diff options
| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 15:03:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 15:03:42 -0700 |
| commit | fc385c313275b114bc6ad36e60c5177d63250548 (patch) | |
| tree | 3436184ec3af11e6506df5233889700a74427055 | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k (diff) | |
| parent | U6715 16550A serial driver support (diff) | |
| download | linux-dev-fc385c313275b114bc6ad36e60c5177d63250548.tar.xz linux-dev-fc385c313275b114bc6ad36e60c5177d63250548.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (68 commits)
U6715 16550A serial driver support
Char: nozomi, set tty->driver_data appropriately
Char: nozomi, fix tty->count counting
serial: max3107: Fix gpiolib support
hsu: call PCI pm hooks in suspend/resume function
hsu: some code cleanup
hsu: add a periodic timer to check dma rx channel
hsu: driver for Medfield High Speed UART device
mxser: remove unnesesary NULL check
serial: add support for OX16PCI958 card
serial: 68328serial.c: remove dead (ALMA_ANS | DRAGONIXVZ | M68EZ328ADS)
timbuart: use __devinit and __devexit macros for probe and remove
serial: MMIO32 support for 8250_early.c
serial: mcf: don't take spinlocks in already protected functions
serial: general fixes in the serial_rs485 structure
serial: fix missing bit coverage of ASYNC_FLAGS
serial: "altera_uart: simplify altera_uart_console_putc()" checkpatch fixes
serial: crisv10: formatting of pointers in printk()
vt: Fix warning: statement with no effect due to vt_kern.h
tty_io: remove casts from void*
...
112 files changed, 5498 insertions, 647 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 44f6b19c50bb..d529b1363e95 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -681,8 +681,11 @@ and is between 256 and 4096 characters. It is defined in the file earlycon= [KNL] Output early console device and options. uart[8250],io,<addr>[,options] uart[8250],mmio,<addr>[,options] + uart[8250],mmio32,<addr>[,options] Start an early, polled-mode console on the 8250/16550 UART at the specified I/O port or MMIO address. + MMIO inter-register address stride is either 8bit (mmio) + or 32bit (mmio32). The options are the same as for ttyS, above. earlyprintk= [X86,SH,BLACKFIN] diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h index 67bb9f6fdbe4..59617c3c2be6 100644 --- a/arch/alpha/include/asm/ioctls.h +++ b/arch/alpha/include/asm/ioctls.h @@ -80,6 +80,7 @@ # define TIOCPKT_START 8 # define TIOCPKT_NOSTOP 16 # define TIOCPKT_DOSTOP 32 +# define TIOCPKT_IOCTL 64 #define TIOCNOTTY 0x5422 @@ -91,6 +92,7 @@ #define TIOCGSID 0x5429 /* Return the session ID of FD */ #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCSERCONFIG 0x5453 #define TIOCSERGWILD 0x5454 @@ -106,7 +108,5 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #endif /* _ASM_ALPHA_IOCTLS_H */ diff --git a/arch/alpha/include/asm/termbits.h b/arch/alpha/include/asm/termbits.h index ad854a4a3af6..879dd3589921 100644 --- a/arch/alpha/include/asm/termbits.h +++ b/arch/alpha/include/asm/termbits.h @@ -180,6 +180,7 @@ struct ktermios { #define FLUSHO 0x00800000 #define PENDIN 0x20000000 #define IEXTEN 0x00000400 +#define EXTPROC 0x10000000 /* Values for the ACTION argument to `tcflow'. */ #define TCOOFF 0 diff --git a/arch/arm/include/asm/ioctls.h b/arch/arm/include/asm/ioctls.h index 7f0b6d13296a..0b30894b5482 100644 --- a/arch/arm/include/asm/ioctls.h +++ b/arch/arm/include/asm/ioctls.h @@ -52,6 +52,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCGRS485 0x542E #define TIOCSRS485 0x542F @@ -81,6 +82,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/arm/include/asm/termbits.h b/arch/arm/include/asm/termbits.h index f784d11f40b5..704135d28d1d 100644 --- a/arch/arm/include/asm/termbits.h +++ b/arch/arm/include/asm/termbits.h @@ -177,6 +177,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/avr32/include/asm/ioctls.h b/arch/avr32/include/asm/ioctls.h index e6ac0b661076..b7dd324b46a9 100644 --- a/arch/avr32/include/asm/ioctls.h +++ b/arch/avr32/include/asm/ioctls.h @@ -53,6 +53,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCGRS485 0x542E #define TIOCSRS485 0x542F @@ -72,8 +73,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 /* Used for packet mode */ @@ -84,6 +83,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/avr32/include/asm/termbits.h b/arch/avr32/include/asm/termbits.h index db2daab31fdb..366adc5ebb10 100644 --- a/arch/avr32/include/asm/termbits.h +++ b/arch/avr32/include/asm/termbits.h @@ -175,6 +175,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/cris/include/asm/ioctls.h b/arch/cris/include/asm/ioctls.h index 076c07824eb6..c9129ed37443 100644 --- a/arch/cris/include/asm/ioctls.h +++ b/arch/cris/include/asm/ioctls.h @@ -54,6 +54,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -70,8 +71,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 #define TIOCSERSETRS485 0x5461 /* enable rs-485 (deprecated) */ @@ -87,6 +86,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/cris/include/asm/termbits.h b/arch/cris/include/asm/termbits.h index 66e1a7492a0c..1c43bc874ccf 100644 --- a/arch/cris/include/asm/termbits.h +++ b/arch/cris/include/asm/termbits.h @@ -214,6 +214,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/frv/include/asm/ioctls.h b/arch/frv/include/asm/ioctls.h index d0c30e31fbda..a993e3759ccf 100644 --- a/arch/frv/include/asm/ioctls.h +++ b/arch/frv/include/asm/ioctls.h @@ -53,6 +53,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -79,6 +80,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/frv/include/asm/termbits.h b/arch/frv/include/asm/termbits.h index 5568492b5086..7722e19cc349 100644 --- a/arch/frv/include/asm/termbits.h +++ b/arch/frv/include/asm/termbits.h @@ -180,6 +180,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ diff --git a/arch/h8300/include/asm/ioctls.h b/arch/h8300/include/asm/ioctls.h index 98a53d067269..b6b249f9f308 100644 --- a/arch/h8300/include/asm/ioctls.h +++ b/arch/h8300/include/asm/ioctls.h @@ -53,6 +53,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -79,6 +80,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/h8300/include/asm/termbits.h b/arch/h8300/include/asm/termbits.h index 31eca81db3f7..3287a6244d74 100644 --- a/arch/h8300/include/asm/termbits.h +++ b/arch/h8300/include/asm/termbits.h @@ -179,6 +179,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ diff --git a/arch/ia64/include/asm/ioctls.h b/arch/ia64/include/asm/ioctls.h index f41b636a0bf6..b79c385114ef 100644 --- a/arch/ia64/include/asm/ioctls.h +++ b/arch/ia64/include/asm/ioctls.h @@ -59,6 +59,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -75,8 +76,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 /* Used for packet mode */ @@ -87,6 +86,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/ia64/include/asm/termbits.h b/arch/ia64/include/asm/termbits.h index 9f162e0089ad..c009b94e58d9 100644 --- a/arch/ia64/include/asm/termbits.h +++ b/arch/ia64/include/asm/termbits.h @@ -187,6 +187,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/m32r/include/asm/ioctls.h b/arch/m32r/include/asm/ioctls.h index b9f54bb5d7cf..66288063a4c0 100644 --- a/arch/m32r/include/asm/ioctls.h +++ b/arch/m32r/include/asm/ioctls.h @@ -53,6 +53,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 #define FIOCLEX 0x5451 @@ -69,8 +70,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 /* Used for packet mode */ @@ -81,6 +80,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/m32r/include/asm/termbits.h b/arch/m32r/include/asm/termbits.h index bc104008b55b..957a3c688549 100644 --- a/arch/m32r/include/asm/termbits.h +++ b/arch/m32r/include/asm/termbits.h @@ -179,6 +179,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/m68k/include/asm/ioctls.h b/arch/m68k/include/asm/ioctls.h index b8d2f4be7fd7..91a57d665460 100644 --- a/arch/m68k/include/asm/ioctls.h +++ b/arch/m68k/include/asm/ioctls.h @@ -52,6 +52,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -78,6 +79,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/m68k/include/asm/termbits.h b/arch/m68k/include/asm/termbits.h index 8c14170996bb..aea1e37b765a 100644 --- a/arch/m68k/include/asm/termbits.h +++ b/arch/m68k/include/asm/termbits.h @@ -179,6 +179,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ diff --git a/arch/mips/include/asm/ioctls.h b/arch/mips/include/asm/ioctls.h index 3f04a995ec54..d87cb0465693 100644 --- a/arch/mips/include/asm/ioctls.h +++ b/arch/mips/include/asm/ioctls.h @@ -41,7 +41,7 @@ #define TIOCPKT_START 0x08 /* start output */ #define TIOCPKT_NOSTOP 0x10 /* no more ^S, ^Q */ #define TIOCPKT_DOSTOP 0x20 /* now do ^S ^Q */ -/* #define TIOCPKT_IOCTL 0x40 state change of pty driver */ +#define TIOCPKT_IOCTL 0x40 /* state change of pty driver */ #define TIOCSWINSZ _IOW('t', 103, struct winsize) /* set window size */ #define TIOCGWINSZ _IOR('t', 104, struct winsize) /* get window size */ #define TIOCNOTTY 0x5471 /* void tty association */ @@ -83,6 +83,7 @@ #define TCSETSF2 _IOW('T', 0x2D, struct termios2) #define TIOCGPTN _IOR('T', 0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T', 0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T', 0x36, int) /* Generate signal on Pty slave */ /* I hope the range from 0x5480 on is free ... */ #define TIOCSCTTY 0x5480 /* become controlling tty */ @@ -103,7 +104,5 @@ #define TIOCSERSETMULTI 0x5490 /* Set multiport config */ #define TIOCMIWAIT 0x5491 /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x5492 /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x5493 /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x5494 /* Set Hayes ESP configuration */ #endif /* __ASM_IOCTLS_H */ diff --git a/arch/mips/include/asm/termbits.h b/arch/mips/include/asm/termbits.h index c83c68444e86..76630b396fac 100644 --- a/arch/mips/include/asm/termbits.h +++ b/arch/mips/include/asm/termbits.h @@ -203,6 +203,7 @@ struct ktermios { #define PENDIN 0040000 /* Retype pending input (state). */ #define TOSTOP 0100000 /* Send SIGTTOU for background output. */ #define ITOSTOP TOSTOP +#define EXTPROC 0200000 /* External processing on pty */ /* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */ #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/mn10300/include/asm/ioctls.h b/arch/mn10300/include/asm/ioctls.h index dcbfb452974f..cb8cf1902234 100644 --- a/arch/mn10300/include/asm/ioctls.h +++ b/arch/mn10300/include/asm/ioctls.h @@ -54,6 +54,7 @@ #define TIOCGPTN _IOR('T', 0x30, unsigned int) /* Get Pty Number * (of pty-mux device) */ #define TIOCSPTLCK _IOW('T', 0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T', 0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 #define FIOCLEX 0x5451 @@ -70,8 +71,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 /* Used for packet mode */ @@ -82,6 +81,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/mn10300/include/asm/termbits.h b/arch/mn10300/include/asm/termbits.h index eb2b0dc1f696..130d42495972 100644 --- a/arch/mn10300/include/asm/termbits.h +++ b/arch/mn10300/include/asm/termbits.h @@ -180,6 +180,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/parisc/include/asm/ioctls.h b/arch/parisc/include/asm/ioctls.h index 6747fad07a3e..4e0614456bea 100644 --- a/arch/parisc/include/asm/ioctls.h +++ b/arch/parisc/include/asm/ioctls.h @@ -52,6 +52,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -68,8 +69,6 @@ #define TIOCMIWAIT 0x545C /* wait for a change on serial input line(s) */ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ -#define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -#define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ #define FIOQSIZE 0x5460 /* Get exact space used by quota */ #define TIOCSTART 0x5461 @@ -84,6 +83,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/parisc/include/asm/termbits.h b/arch/parisc/include/asm/termbits.h index d8bbc73b16b7..d1ab92177a5c 100644 --- a/arch/parisc/include/asm/termbits.h +++ b/arch/parisc/include/asm/termbits.h @@ -180,6 +180,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/arch/powerpc/include/asm/ioctls.h b/arch/powerpc/include/asm/ioctls.h index 1842186d872c..851920052e08 100644 --- a/arch/powerpc/include/asm/ioctls.h +++ b/arch/powerpc/include/asm/ioctls.h @@ -80,6 +80,7 @@ # define TIOCPKT_START 8 # define TIOCPKT_NOSTOP 16 # define TIOCPKT_DOSTOP 32 +# define TIOCPKT_IOCTL 64 #define TIOCNOTTY 0x5422 @@ -93,6 +94,7 @@ #define TIOCSRS485 0x542f #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCSERCONFIG 0x5453 #define TIOCSERGWILD 0x5454 diff --git a/arch/powerpc/include/asm/termbits.h b/arch/powerpc/include/asm/termbits.h index 6698188ca550..549d700e18f2 100644 --- a/arch/powerpc/include/asm/termbits.h +++ b/arch/powerpc/include/asm/termbits.h @@ -189,6 +189,7 @@ struct ktermios { #define FLUSHO 0x00800000 #define PENDIN 0x20000000 #define IEXTEN 0x00000400 +#define EXTPROC 0x10000000 /* Values for the ACTION argument to `tcflow'. */ #define TCOOFF 0 diff --git a/arch/s390/include/asm/ioctls.h b/arch/s390/include/asm/ioctls.h index 40e481b1b461..2f3d8736361f 100644 --- a/arch/s390/include/asm/ioctls.h +++ b/arch/s390/include/asm/ioctls.h @@ -60,6 +60,7 @@ #define TCSETSF2 _IOW('T',0x2D, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define FIONCLEX 0x5450 /* these numbers need to be adjusted. */ #define FIOCLEX 0x5451 @@ -86,6 +87,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/arch/sh/include/asm/ioctls.h b/arch/sh/include/asm/ioctls.h index c212c371a4a5..eb6c4c687972 100644 --- a/arch/sh/include/asm/ioctls.h +++ b/arch/sh/include/asm/ioctls.h @@ -69,6 +69,7 @@ # define TIOCPKT_START 8 # define TIOCPKT_NOSTOP 16 # define TIOCPKT_DOSTOP 32 +# define TIOCPKT_IOCTL 64 #define TIOCNOTTY _IO('T', 34) /* 0x5422 */ @@ -84,6 +85,7 @@ #define TCSETSF2 _IOW('T', 45, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCSERCONFIG _IO('T', 83) /* 0x5453 */ #define TIOCSERGWILD _IOR('T', 84, int) /* 0x5454 */ diff --git a/arch/sparc/include/asm/ioctls.h b/arch/sparc/include/asm/ioctls.h index 1fe6855c5c18..53f4ee009bdd 100644 --- a/arch/sparc/include/asm/ioctls.h +++ b/arch/sparc/include/asm/ioctls.h @@ -80,6 +80,7 @@ /* Get minor device of a pty master's FD -- Solaris equiv is ISPTM */ #define TIOCGPTN _IOR('t', 134, unsigned int) /* Get Pty Number */ #define TIOCSPTLCK _IOW('t', 135, int) /* Lock/unlock PTY */ +#define TIOCSIG _IOW('t', 136, int) /* Generate signal on Pty slave */ /* Little f */ #define FIOCLEX _IO('f', 1) @@ -132,5 +133,6 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #endif /* !(_ASM_SPARC_IOCTLS_H) */ diff --git a/arch/sparc/include/asm/termbits.h b/arch/sparc/include/asm/termbits.h index d72dfed1f9d7..23b10ff08df2 100644 --- a/arch/sparc/include/asm/termbits.h +++ b/arch/sparc/include/asm/termbits.h @@ -225,6 +225,7 @@ struct ktermios { #define FLUSHO 0x00002000 #define PENDIN 0x00004000 #define IEXTEN 0x00008000 +#define EXTPROC 0x00010000 /* modem lines */ #define TIOCM_LE 0x001 diff --git a/arch/xtensa/include/asm/ioctls.h b/arch/xtensa/include/asm/ioctls.h index 0ffa942954b9..ab1800012ed9 100644 --- a/arch/xtensa/include/asm/ioctls.h +++ b/arch/xtensa/include/asm/ioctls.h @@ -81,6 +81,7 @@ # define TIOCPKT_START 8 # define TIOCPKT_NOSTOP 16 # define TIOCPKT_DOSTOP 32 +# define TIOCPKT_IOCTL 64 #define TIOCNOTTY _IO('T', 34) @@ -97,6 +98,7 @@ #define TCSETSF2 _IOW('T', 45, struct termios2) #define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */ #define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */ +#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */ #define TIOCSERCONFIG _IO('T', 83) #define TIOCSERGWILD _IOR('T', 84, int) diff --git a/arch/xtensa/include/asm/termbits.h b/arch/xtensa/include/asm/termbits.h index 85aa6a3c0b6e..0d6c8715b24f 100644 --- a/arch/xtensa/include/asm/termbits.h +++ b/arch/xtensa/include/asm/termbits.h @@ -196,6 +196,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ diff --git a/drivers/char/Makefile b/drivers/char/Makefile index 273cee1cc77b..dc9641660605 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -9,6 +9,7 @@ FONTMAPFILE = cp437.uni obj-y += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o tty_buffer.o tty_port.o +obj-y += tty_mutex.o obj-$(CONFIG_LEGACY_PTYS) += pty.o obj-$(CONFIG_UNIX98_PTYS) += pty.o obj-y += misc.o diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c index 4f8d60c25a98..a11c8c9ca3d4 100644 --- a/drivers/char/amiserial.c +++ b/drivers/char/amiserial.c @@ -1072,7 +1072,7 @@ static int get_serial_info(struct async_struct * info, if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); - lock_kernel(); + tty_lock(); tmp.type = state->type; tmp.line = state->line; tmp.port = state->port; @@ -1083,7 +1083,7 @@ static int get_serial_info(struct async_struct * info, tmp.close_delay = state->close_delay; tmp.closing_wait = state->closing_wait; tmp.custom_divisor = state->custom_divisor; - unlock_kernel(); + tty_unlock(); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1100,14 +1100,14 @@ static int set_serial_info(struct async_struct * info, if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) return -EFAULT; - lock_kernel(); + tty_lock(); state = info->state; old_state = *state; change_irq = new_serial.irq != state->irq; change_port = (new_serial.port != state->port); if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) { - unlock_kernel(); + tty_unlock(); return -EINVAL; } @@ -1127,7 +1127,7 @@ static int set_serial_info(struct async_struct * info, } if (new_serial.baud_base < 9600) { - unlock_kernel(); + tty_unlock(); return -EINVAL; } @@ -1163,7 +1163,7 @@ check_and_exit: } } else retval = startup(info); - unlock_kernel(); + tty_unlock(); return retval; } @@ -1528,6 +1528,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) { struct async_struct * info = tty->driver_data; unsigned long orig_jiffies, char_time; + int tty_was_locked = tty_locked(); int lsr; if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) @@ -1538,7 +1539,12 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) orig_jiffies = jiffies; - lock_kernel(); + /* + * tty_wait_until_sent is called from lots of places, + * with or without the BTM. + */ + if (!tty_was_locked) + tty_lock(); /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check @@ -1579,7 +1585,8 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) break; } __set_current_state(TASK_RUNNING); - unlock_kernel(); + if (!tty_was_locked) + tty_unlock(); #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); #endif @@ -1703,7 +1710,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttys%d, count = %d\n", info->line, state->count); #endif + tty_unlock(); schedule(); + tty_lock(); } __set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c index 555cd93c2ee5..d5fa113afe37 100644 --- a/drivers/char/briq_panel.c +++ b/drivers/char/briq_panel.c @@ -67,15 +67,15 @@ static void set_led(char state) static int briq_panel_open(struct inode *ino, struct file *filep) { - lock_kernel(); + tty_lock(); /* enforce single access, vfd_is_open is protected by BKL */ if (vfd_is_open) { - unlock_kernel(); + tty_unlock(); return -EBUSY; } vfd_is_open = 1; - unlock_kernel(); + tty_unlock(); return 0; } diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index 9824b4162904..27aad9422332 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -65,7 +65,6 @@ #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial.h> -#include <linux/smp_lock.h> #include <linux/major.h> #include <linux/string.h> #include <linux/fcntl.h> @@ -1608,7 +1607,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp) * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { - wait_event_interruptible(info->port.close_wait, + wait_event_interruptible_tty(info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } @@ -1655,7 +1654,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout) return; /* Just in case.... */ orig_jiffies = jiffies; - lock_kernel(); /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check @@ -1702,7 +1700,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout) } /* Run one more char cycle */ msleep_interruptible(jiffies_to_msecs(char_time * 5)); - unlock_kernel(); #ifdef CY_DEBUG_WAIT_UNTIL_SENT printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); #endif @@ -1959,7 +1956,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty) int char_count; __u32 tx_put, tx_get, tx_bufsize; - lock_kernel(); tx_get = readl(&buf_ctrl->tx_get); tx_put = readl(&buf_ctrl->tx_put); tx_bufsize = readl(&buf_ctrl->tx_bufsize); @@ -1971,7 +1967,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty) printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); #endif - unlock_kernel(); return info->xmit_cnt + char_count; } #endif /* Z_EXT_CHARS_IN_BUFFER */ @@ -2359,17 +2354,22 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty, struct serial_struct __user *new_info) { struct serial_struct new_serial; + int ret; if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) return -EFAULT; + mutex_lock(&info->port.mutex); if (!capable(CAP_SYS_ADMIN)) { if (new_serial.close_delay != info->port.close_delay || new_serial.baud_base != info->baud || (new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) + { + mutex_unlock(&info->port.mutex); return -EPERM; + } info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK); info->baud = new_serial.baud_base; @@ -2392,10 +2392,12 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty, check_and_exit: if (info->port.flags & ASYNC_INITIALIZED) { cy_set_line_char(info, tty); - return 0; + ret = 0; } else { - return cy_startup(info, tty); + ret = cy_startup(info, tty); } + mutex_unlock(&info->port.mutex); + return ret; } /* set_serial_info */ /* @@ -2438,7 +2440,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file) card = info->card; - lock_kernel(); if (!cy_is_Z(card)) { unsigned long flags; int channel = info->line - card->first_line; @@ -2478,7 +2479,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file) ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); } end: - unlock_kernel(); return result; } /* cy_tiomget */ @@ -2696,7 +2696,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file, printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); #endif - lock_kernel(); switch (cmd) { case CYGETMON: @@ -2817,7 +2816,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file, default: ret_val = -ENOIOCTLCMD; } - unlock_kernel(); #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_ioctl done\n"); diff --git a/drivers/char/epca.c b/drivers/char/epca.c index 6f5ffe1320f7..d9df46aa0fba 100644 --- a/drivers/char/epca.c +++ b/drivers/char/epca.c @@ -36,7 +36,7 @@ #include <linux/ctype.h> #include <linux/tty.h> #include <linux/tty_flip.h> -#include <linux/smp_lock.h> +#include <linux/slab.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/uaccess.h> @@ -2105,7 +2105,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file, break; case DIGI_SETAW: case DIGI_SETAF: - lock_kernel(); if (cmd == DIGI_SETAW) { /* Setup an event to indicate when the transmit buffer empties */ @@ -2118,7 +2117,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file, if (tty->ldisc->ops->flush_buffer) tty->ldisc->ops->flush_buffer(tty); } - unlock_kernel(); /* Fall Thru */ case DIGI_SETA: if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c index 911e1da6def2..07f3ea38b582 100644 --- a/drivers/char/ip2/ip2main.c +++ b/drivers/char/ip2/ip2main.c @@ -1486,7 +1486,9 @@ ip2_open( PTTY tty, struct file *pFile ) if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) { if ( pCh->flags & ASYNC_CLOSING ) { + tty_unlock(); schedule(); + tty_lock(); } if ( tty_hung_up_p(pFile) ) { set_current_state( TASK_RUNNING ); @@ -1548,7 +1550,9 @@ ip2_open( PTTY tty, struct file *pFile ) rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS); break; } + tty_unlock(); schedule(); + tty_lock(); } set_current_state( TASK_RUNNING ); remove_wait_queue(&pCh->open_wait, &wait); diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c index 98310e1aae30..c27e9d21fea9 100644 --- a/drivers/char/isicom.c +++ b/drivers/char/isicom.c @@ -124,7 +124,6 @@ #include <linux/fs.h> #include <linux/sched.h> #include <linux/serial.h> -#include <linux/smp_lock.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/timer.h> @@ -872,7 +871,6 @@ static struct tty_port *isicom_find_port(struct tty_struct *tty) static int isicom_open(struct tty_struct *tty, struct file *filp) { struct isi_port *port; - struct isi_board *card; struct tty_port *tport; tport = isicom_find_port(tty); @@ -1118,8 +1116,7 @@ static int isicom_set_serial_info(struct tty_struct *tty, if (copy_from_user(&newinfo, info, sizeof(newinfo))) return -EFAULT; - lock_kernel(); - + mutex_lock(&port->port.mutex); reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) != (newinfo.flags & ASYNC_SPD_MASK)); @@ -1128,7 +1125,7 @@ static int isicom_set_serial_info(struct tty_struct *tty, (newinfo.closing_wait != port->port.closing_wait) || ((newinfo.flags & ~ASYNC_USR_MASK) != (port->port.flags & ~ASYNC_USR_MASK))) { - unlock_kernel(); + mutex_unlock(&port->port.mutex); return -EPERM; } port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | @@ -1145,7 +1142,7 @@ static int isicom_set_serial_info(struct tty_struct *tty, isicom_config_port(tty); spin_unlock_irqrestore(&port->card->card_lock, flags); } - unlock_kernel(); + mutex_unlock(&port->port.mutex); return 0; } @@ -1154,7 +1151,7 @@ static int isicom_get_serial_info(struct isi_port *port, { struct serial_struct out_info; - lock_kernel(); + mutex_lock(&port->port.mutex); memset(&out_info, 0, sizeof(out_info)); /* out_info.type = ? */ out_info.line = port - isi_ports; @@ -1164,7 +1161,7 @@ static int isicom_get_serial_info(struct isi_port *port, /* out_info.baud_base = ? */ out_info.close_delay = port->port.close_delay; out_info.closing_wait = port->port.closing_wait; - unlock_kernel(); + mutex_unlock(&port->port.mutex); if (copy_to_user(info, &out_info, sizeof(out_info))) return -EFAULT; return 0; diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c index 4e395c956a09..be28391adb79 100644 --- a/drivers/char/istallion.c +++ b/drivers/char/istallion.c @@ -203,9 +203,9 @@ static int stli_shared; * the board has been detected, and whether it is actually running a slave * or not. */ -#define BST_FOUND 0x1 -#define BST_STARTED 0x2 -#define BST_PROBED 0x4 +#define BST_FOUND 0 +#define BST_STARTED 1 +#define BST_PROBED 2 /* * Define the set of port state flags. These are marked for internal @@ -816,7 +816,7 @@ static int stli_open(struct tty_struct *tty, struct file *filp) brdp = stli_brds[brdnr]; if (brdp == NULL) return -ENODEV; - if ((brdp->state & BST_STARTED) == 0) + if (!test_bit(BST_STARTED, &brdp->state)) return -ENODEV; portnr = MINOR2PORT(minordev); if (portnr > brdp->nrports) @@ -954,7 +954,7 @@ static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned l * order of opens and closes may not be preserved across shared * memory, so we must wait until it is complete. */ - wait_event_interruptible(portp->raw_wait, + wait_event_interruptible_tty(portp->raw_wait, !test_bit(ST_CLOSING, &portp->state)); if (signal_pending(current)) { return -ERESTARTSYS; @@ -989,7 +989,7 @@ static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned l set_bit(ST_OPENING, &portp->state); spin_unlock_irqrestore(&brd_lock, flags); - wait_event_interruptible(portp->raw_wait, + wait_event_interruptible_tty(portp->raw_wait, !test_bit(ST_OPENING, &portp->state)); if (signal_pending(current)) rc = -ERESTARTSYS; @@ -1020,7 +1020,7 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned * occurs on this port. */ if (wait) { - wait_event_interruptible(portp->raw_wait, + wait_event_interruptible_tty(portp->raw_wait, !test_bit(ST_CLOSING, &portp->state)); if (signal_pending(current)) { return -ERESTARTSYS; @@ -1052,7 +1052,7 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned * to come back. */ rc = 0; - wait_event_interruptible(portp->raw_wait, + wait_event_interruptible_tty(portp->raw_wait, !test_bit(ST_CLOSING, &portp->state)); if (signal_pending(current)) rc = -ERESTARTSYS; @@ -1073,6 +1073,10 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback) { + /* + * no need for wait_event_tty because clearing ST_CMDING cannot block + * on BTM + */ wait_event_interruptible(portp->raw_wait, !test_bit(ST_CMDING, &portp->state)); if (signal_pending(current)) @@ -1846,7 +1850,7 @@ static void stli_portinfo(struct seq_file *m, struct stlibrd *brdp, struct stlip rc = stli_portcmdstats(NULL, portp); uart = "UNKNOWN"; - if (brdp->state & BST_STARTED) { + if (test_bit(BST_STARTED, &brdp->state)) { switch (stli_comstats.hwid) { case 0: uart = "2681"; break; case 1: uart = "SC26198"; break; @@ -1855,7 +1859,7 @@ static void stli_portinfo(struct seq_file *m, struct stlibrd *brdp, struct stlip } seq_printf(m, "%d: uart:%s ", portnr, uart); - if ((brdp->state & BST_STARTED) && (rc >= 0)) { + if (test_bit(BST_STARTED, &brdp->state) && rc >= 0) { char sep; seq_printf(m, "tx:%d rx:%d", (int) stli_comstats.txtotal, @@ -2355,7 +2359,7 @@ static void stli_poll(unsigned long arg) brdp = stli_brds[brdnr]; if (brdp == NULL) continue; - if ((brdp->state & BST_STARTED) == 0) + if (!test_bit(BST_STARTED, &brdp->state)) continue; spin_lock(&brd_lock); @@ -3140,7 +3144,7 @@ static int stli_initecp(struct stlibrd *brdp) } - brdp->state |= BST_FOUND; + set_bit(BST_FOUND, &brdp->state); return 0; err_unmap: iounmap(brdp->membase); @@ -3297,7 +3301,7 @@ static int stli_initonb(struct stlibrd *brdp) brdp->panels[0] = brdp->nrports; - brdp->state |= BST_FOUND; + set_bit(BST_FOUND, &brdp->state); return 0; err_unmap: iounmap(brdp->membase); @@ -3407,7 +3411,7 @@ stli_donestartup: spin_unlock_irqrestore(&brd_lock, flags); if (rc == 0) - brdp->state |= BST_STARTED; + set_bit(BST_STARTED, &brdp->state); if (! stli_timeron) { stli_timeron++; @@ -3710,7 +3714,7 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev, if (retval) goto err_null; - brdp->state |= BST_PROBED; + set_bit(BST_PROBED, &brdp->state); pci_set_drvdata(pdev, brdp); EBRDENABLE(brdp); @@ -3841,7 +3845,7 @@ static int __init stli_initbrds(void) brdp = stli_brds[i]; if (brdp == NULL) continue; - if (brdp->state & BST_FOUND) { + if (test_bit(BST_FOUND, &brdp->state)) { EBRDENABLE(brdp); brdp->enable = NULL; brdp->disable = NULL; @@ -4011,6 +4015,7 @@ static int stli_getbrdstats(combrd_t __user *bp) return -ENODEV; memset(&stli_brdstats, 0, sizeof(combrd_t)); + stli_brdstats.brd = brdp->brdnr; stli_brdstats.type = brdp->brdtype; stli_brdstats.hwid = 0; @@ -4076,10 +4081,13 @@ static int stli_portcmdstats(struct tty_struct *tty, struct stliport *portp) if (brdp == NULL) return -ENODEV; - if (brdp->state & BST_STARTED) { + mutex_lock(&portp->port.mutex); + if (test_bit(BST_STARTED, &brdp->state)) { if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS, - &stli_cdkstats, sizeof(asystats_t), 1)) < 0) + &stli_cdkstats, sizeof(asystats_t), 1)) < 0) { + mutex_unlock(&portp->port.mutex); return rc; + } } else { memset(&stli_cdkstats, 0, sizeof(asystats_t)); } @@ -4124,6 +4132,7 @@ static int stli_portcmdstats(struct tty_struct *tty, struct stliport *portp) stli_comstats.modem = stli_cdkstats.dcdcnt; stli_comstats.hwid = stli_cdkstats.hwid; stli_comstats.signals = stli_mktiocm(stli_cdkstats.signals); + mutex_unlock(&portp->port.mutex); return 0; } @@ -4186,15 +4195,20 @@ static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp) if (!brdp) return -ENODEV; - if (brdp->state & BST_STARTED) { - if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0) + mutex_lock(&portp->port.mutex); + + if (test_bit(BST_STARTED, &brdp->state)) { + if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0) { + mutex_unlock(&portp->port.mutex); return rc; + } } memset(&stli_comstats, 0, sizeof(comstats_t)); stli_comstats.brd = portp->brdnr; stli_comstats.panel = portp->panelnr; stli_comstats.port = portp->portnr; + mutex_unlock(&portp->port.mutex); if (copy_to_user(cp, &stli_comstats, sizeof(comstats_t))) return -EFAULT; @@ -4266,8 +4280,6 @@ static long stli_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) done = 0; rc = 0; - lock_kernel(); - switch (cmd) { case COM_GETPORTSTATS: rc = stli_getportstats(NULL, NULL, argp); @@ -4290,8 +4302,6 @@ static long stli_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) done++; break; } - unlock_kernel(); - if (done) return rc; @@ -4308,8 +4318,6 @@ static long stli_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) if (brdp->state == 0) return -ENODEV; - lock_kernel(); - switch (cmd) { case STL_BINTR: EBRDINTR(brdp); @@ -4318,10 +4326,10 @@ static long stli_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) rc = stli_startbrd(brdp); break; case STL_BSTOP: - brdp->state &= ~BST_STARTED; + clear_bit(BST_STARTED, &brdp->state); break; case STL_BRESET: - brdp->state &= ~BST_STARTED; + clear_bit(BST_STARTED, &brdp->state); EBRDRESET(brdp); if (stli_shared == 0) { if (brdp->reenable != NULL) @@ -4332,7 +4340,6 @@ static long stli_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) rc = -ENOIOCTLCMD; break; } - unlock_kernel(); return rc; } @@ -4378,7 +4385,8 @@ static void istallion_cleanup_isa(void) unsigned int j; for (j = 0; (j < stli_nrbrds); j++) { - if ((brdp = stli_brds[j]) == NULL || (brdp->state & BST_PROBED)) + if ((brdp = stli_brds[j]) == NULL || + test_bit(BST_PROBED, &brdp->state)) continue; stli_cleanup_ports(brdp); diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c index 25be2102a60a..a7ca75212bfe 100644 --- a/drivers/char/keyboard.c +++ b/drivers/char/keyboard.c @@ -299,7 +299,7 @@ int kbd_rate(struct kbd_repeat *rep) */ static void put_queue(struct vc_data *vc, int ch) { - struct tty_struct *tty = vc->vc_tty; + struct tty_struct *tty = vc->port.tty; if (tty) { tty_insert_flip_char(tty, ch, 0); @@ -309,7 +309,7 @@ static void put_queue(struct vc_data *vc, int ch) static void puts_queue(struct vc_data *vc, char *cp) { - struct tty_struct *tty = vc->vc_tty; + struct tty_struct *tty = vc->port.tty; if (!tty) return; @@ -485,7 +485,7 @@ static void fn_show_ptregs(struct vc_data *vc) static void fn_hold(struct vc_data *vc) { - struct tty_struct *tty = vc->vc_tty; + struct tty_struct *tty = vc->port.tty; if (rep || !tty) return; @@ -563,7 +563,7 @@ static void fn_inc_console(struct vc_data *vc) static void fn_send_intr(struct vc_data *vc) { - struct tty_struct *tty = vc->vc_tty; + struct tty_struct *tty = vc->port.tty; if (!tty) return; @@ -1162,7 +1162,7 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw) struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down }; int rc; - tty = vc->vc_tty; + tty = vc->port.tty; if (tty && (!tty->driver_data)) { /* No driver data? Strange. Okay we fix it then. */ diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c index d2692d443f7b..3fc89da856ae 100644 --- a/drivers/char/mxser.c +++ b/drivers/char/mxser.c @@ -2193,7 +2193,7 @@ static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port port->mon_data.up_txcnt += (cnt - port->xmit_cnt); port->icount.tx += (cnt - port->xmit_cnt); - if (port->xmit_cnt < WAKEUP_CHARS && tty) + if (port->xmit_cnt < WAKEUP_CHARS) tty_wakeup(tty); if (port->xmit_cnt <= 0) { diff --git a/drivers/char/n_gsm.c b/drivers/char/n_gsm.c index e4089c432f15..099105e0894e 100644 --- a/drivers/char/n_gsm.c +++ b/drivers/char/n_gsm.c @@ -43,7 +43,6 @@ #include <linux/sched.h> #include <linux/interrupt.h> #include <linux/tty.h> -#include <linux/timer.h> #include <linux/ctype.h> #include <linux/mm.h> #include <linux/string.h> diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c index c68118efad84..47d32281032c 100644 --- a/drivers/char/n_hdlc.c +++ b/drivers/char/n_hdlc.c @@ -598,18 +598,18 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file, return -EFAULT; } - lock_kernel(); + tty_lock(); for (;;) { if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) { - unlock_kernel(); + tty_unlock(); return -EIO; } n_hdlc = tty2n_hdlc (tty); if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC || tty != n_hdlc->tty) { - unlock_kernel(); + tty_unlock(); return 0; } @@ -619,13 +619,13 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file, /* no data */ if (file->f_flags & O_NONBLOCK) { - unlock_kernel(); + tty_unlock(); return -EAGAIN; } interruptible_sleep_on (&tty->read_wait); if (signal_pending(current)) { - unlock_kernel(); + tty_unlock(); return -EINTR; } } @@ -648,7 +648,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file, kfree(rbuf); else n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,rbuf); - unlock_kernel(); + tty_unlock(); return ret; } /* end of n_hdlc_tty_read() */ @@ -691,7 +691,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file, count = maxframe; } - lock_kernel(); + tty_lock(); add_wait_queue(&tty->write_wait, &wait); set_current_state(TASK_INTERRUPTIBLE); @@ -731,7 +731,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file, n_hdlc_buf_put(&n_hdlc->tx_buf_list,tbuf); n_hdlc_send_frames(n_hdlc,tty); } - unlock_kernel(); + tty_unlock(); return error; } /* end of n_hdlc_tty_write() */ diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c index c1d8b54c816d..a98290d7a2c5 100644 --- a/drivers/char/n_r3964.c +++ b/drivers/char/n_r3964.c @@ -1067,7 +1067,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, TRACE_L("read()"); - lock_kernel(); + tty_lock(); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1079,7 +1079,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, goto unlock; } /* block until there is a message: */ - wait_event_interruptible(pInfo->read_wait, + wait_event_interruptible_tty(pInfo->read_wait, (pMsg = remove_msg(pInfo, pClient))); } @@ -1109,7 +1109,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, } ret = -EPERM; unlock: - unlock_kernel(); + tty_unlock(); return ret; } @@ -1158,7 +1158,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, pHeader->locks = 0; pHeader->owner = NULL; - lock_kernel(); + tty_lock(); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1177,7 +1177,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, add_tx_queue(pInfo, pHeader); trigger_transmit(pInfo); - unlock_kernel(); + tty_unlock(); return 0; } diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index bdae8327143c..428f4fe0b5f7 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -1102,6 +1102,11 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) if (I_IUCLC(tty) && L_IEXTEN(tty)) c = tolower(c); + if (L_EXTPROC(tty)) { + put_tty_queue(c, tty); + return; + } + if (tty->stopped && !tty->flow_stopped && I_IXON(tty) && I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty) && c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && c != SUSP_CHAR(tty)) { @@ -1409,7 +1414,8 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, n_tty_set_room(tty); - if (!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) { + if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) || + L_EXTPROC(tty)) { kill_fasync(&tty->fasync, SIGIO, POLL_IN); if (waitqueue_active(&tty->read_wait)) wake_up_interruptible(&tty->read_wait); @@ -1585,7 +1591,7 @@ static int n_tty_open(struct tty_struct *tty) static inline int input_available_p(struct tty_struct *tty, int amt) { tty_flush_to_ldisc(tty); - if (tty->icanon) { + if (tty->icanon && !L_EXTPROC(tty)) { if (tty->canon_data) return 1; } else if (tty->read_cnt >= (amt ? amt : 1)) @@ -1632,6 +1638,11 @@ static int copy_from_read_buf(struct tty_struct *tty, spin_lock_irqsave(&tty->read_lock, flags); tty->read_tail = (tty->read_tail + n) & (N_TTY_BUF_SIZE-1); tty->read_cnt -= n; + /* Turn single EOF into zero-length read */ + if (L_EXTPROC(tty) && tty->icanon && n == 1) { + if (!tty->read_cnt && (*b)[n-1] == EOF_CHAR(tty)) + n--; + } spin_unlock_irqrestore(&tty->read_lock, flags); *b += n; *nr -= n; @@ -1812,7 +1823,7 @@ do_it_again: nr--; } - if (tty->icanon) { + if (tty->icanon && !L_EXTPROC(tty)) { /* N.B. avoid overrun if nr == 0 */ while (nr && tty->read_cnt) { int eol; diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c index a6638003f530..18af923093c3 100644 --- a/drivers/char/nozomi.c +++ b/drivers/char/nozomi.c @@ -1611,6 +1611,8 @@ static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) ret = tty_init_termios(tty); if (ret == 0) { tty_driver_kref_get(driver); + tty->count++; + tty->driver_data = port; driver->ttys[tty->index] = tty; } return ret; @@ -1639,7 +1641,7 @@ static int ntty_activate(struct tty_port *tport, struct tty_struct *tty) static int ntty_open(struct tty_struct *tty, struct file *filp) { - struct port *port = get_port_by_tty(tty); + struct port *port = tty->driver_data; return tty_port_open(&port->port, tty, filp); } diff --git a/drivers/char/pty.c b/drivers/char/pty.c index d83a43130df4..ad46eae1f9bb 100644 --- a/drivers/char/pty.c +++ b/drivers/char/pty.c @@ -62,7 +62,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) if (tty->driver == ptm_driver) devpts_pty_kill(tty->link); #endif + tty_unlock(); tty_vhangup(tty->link); + tty_lock(); } } @@ -171,6 +173,23 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg) return 0; } +/* Send a signal to the slave */ +static int pty_signal(struct tty_struct *tty, int sig) +{ + unsigned long flags; + struct pid *pgrp; + + if (tty->link) { + spin_lock_irqsave(&tty->link->ctrl_lock, flags); + pgrp = get_pid(tty->link->pgrp); + spin_unlock_irqrestore(&tty->link->ctrl_lock, flags); + + kill_pgrp(pgrp, sig, 1); + put_pid(pgrp); + } + return 0; +} + static void pty_flush_buffer(struct tty_struct *tty) { struct tty_struct *to = tty->link; @@ -321,6 +340,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty, struct file *file, switch (cmd) { case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */ return pty_set_lock(tty, (int __user *) arg); + case TIOCSIG: /* Send signal to other side of pty */ + return pty_signal(tty, (int) arg); } return -ENOIOCTLCMD; } @@ -476,6 +497,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty, struct file *file, return pty_set_lock(tty, (int __user *)arg); case TIOCGPTN: /* Get PT Number */ return put_user(tty->index, (unsigned int __user *)arg); + case TIOCSIG: /* Send signal to other side of pty */ + return pty_signal(tty, (int) arg); } return -ENOIOCTLCMD; @@ -626,7 +649,7 @@ static const struct tty_operations pty_unix98_ops = { * allocated_ptys_lock handles the list of free pty numbers */ -static int __ptmx_open(struct inode *inode, struct file *filp) +static int ptmx_open(struct inode *inode, struct file *filp) { struct tty_struct *tty; int retval; @@ -635,11 +658,14 @@ static int __ptmx_open(struct inode *inode, struct file *filp) nonseekable_open(inode, filp); /* find a device that is not in use. */ + tty_lock(); index = devpts_new_index(inode); + tty_unlock(); if (index < 0) return index; mutex_lock(&tty_mutex); + tty_lock(); tty = tty_init_dev(ptm_driver, index, 1); mutex_unlock(&tty_mutex); @@ -657,26 +683,21 @@ static int __ptmx_open(struct inode *inode, struct file *filp) goto out1; retval = ptm_driver->ops->open(tty, filp); - if (!retval) - return 0; + if (retval) + goto out2; out1: + tty_unlock(); + return retval; +out2: + tty_unlock(); tty_release(inode, filp); return retval; out: devpts_kill_index(inode, index); + tty_unlock(); return retval; } -static int ptmx_open(struct inode *inode, struct file *filp) -{ - int ret; - - lock_kernel(); - ret = __ptmx_open(inode, filp); - unlock_kernel(); - return ret; -} - static struct file_operations ptmx_fops; static void __init unix98_pty_init(void) diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c index b02332a5412f..af4de1fe8445 100644 --- a/drivers/char/riscom8.c +++ b/drivers/char/riscom8.c @@ -47,7 +47,6 @@ #include <linux/init.h> #include <linux/delay.h> #include <linux/tty_flip.h> -#include <linux/smp_lock.h> #include <linux/spinlock.h> #include <linux/device.h> @@ -1184,6 +1183,7 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, if (copy_from_user(&tmp, newinfo, sizeof(tmp))) return -EFAULT; + mutex_lock(&port->port.mutex); change_speed = ((port->port.flags & ASYNC_SPD_MASK) != (tmp.flags & ASYNC_SPD_MASK)); @@ -1191,8 +1191,10 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, if ((tmp.close_delay != port->port.close_delay) || (tmp.closing_wait != port->port.closing_wait) || ((tmp.flags & ~ASYNC_USR_MASK) != - (port->port.flags & ~ASYNC_USR_MASK))) + (port->port.flags & ~ASYNC_USR_MASK))) { + mutex_unlock(&port->port.mutex); return -EPERM; + } port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | (tmp.flags & ASYNC_USR_MASK)); } else { @@ -1208,6 +1210,7 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, rc_change_speed(tty, bp, port); spin_unlock_irqrestore(&riscom_lock, flags); } + mutex_unlock(&port->port.mutex); return 0; } @@ -1220,12 +1223,15 @@ static int rc_get_serial_info(struct riscom_port *port, memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_CIRRUS; tmp.line = port - rc_port; + + mutex_lock(&port->port.mutex); tmp.port = bp->base; tmp.irq = bp->irq; tmp.flags = port->port.flags; tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; tmp.close_delay = port->port.close_delay * HZ/100; tmp.closing_wait = port->port.closing_wait * HZ/100; + mutex_unlock(&port->port.mutex); tmp.xmit_fifo_size = CD180_NFIFO; return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; } @@ -1242,14 +1248,10 @@ static int rc_ioctl(struct tty_struct *tty, struct file *filp, switch (cmd) { case TIOCGSERIAL: - lock_kernel(); retval = rc_get_serial_info(port, argp); - unlock_kernel(); break; case TIOCSSERIAL: - lock_kernel(); retval = rc_set_serial_info(tty, port, argp); - unlock_kernel(); break; default: retval = -ENOIOCTLCMD; diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c index 0e29a23ec4c5..79c3bc69165a 100644 --- a/drivers/char/rocket.c +++ b/drivers/char/rocket.c @@ -73,7 +73,6 @@ #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/serial.h> -#include <linux/smp_lock.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/ptrace.h> @@ -1017,6 +1016,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(port, tty, filp) == 0) return; + mutex_lock(&port->mutex); cp = &info->channel; /* * Before we drop DTR, make sure the UART transmitter @@ -1060,9 +1060,13 @@ static void rp_close(struct tty_struct *tty, struct file *filp) info->xmit_buf = NULL; } } + spin_lock_irq(&port->lock); info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE); tty->closing = 0; + spin_unlock_irq(&port->lock); + mutex_unlock(&port->mutex); tty_port_tty_set(port, NULL); + wake_up_interruptible(&port->close_wait); complete_all(&info->close_wait); atomic_dec(&rp_num_ports_open); @@ -1210,11 +1214,13 @@ static int get_config(struct r_port *info, struct rocket_config __user *retinfo) if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof (tmp)); + mutex_lock(&info->port.mutex); tmp.line = info->line; tmp.flags = info->flags; tmp.close_delay = info->port.close_delay; tmp.closing_wait = info->port.closing_wait; tmp.port = rcktpt_io_addr[(info->line >> 5) & 3]; + mutex_unlock(&info->port.mutex); if (copy_to_user(retinfo, &tmp, sizeof (*retinfo))) return -EFAULT; @@ -1229,10 +1235,13 @@ static int set_config(struct tty_struct *tty, struct r_port *info, if (copy_from_user(&new_serial, new_info, sizeof (new_serial))) return -EFAULT; + mutex_lock(&info->port.mutex); if (!capable(CAP_SYS_ADMIN)) { - if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) + if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) { + mutex_unlock(&info->port.mutex); return -EPERM; + } info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK)); configure_r_port(tty, info, NULL); return 0; @@ -1250,6 +1259,7 @@ static int set_config(struct tty_struct *tty, struct r_port *info, tty->alt_speed = 230400; if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP) tty->alt_speed = 460800; + mutex_unlock(&info->port.mutex); configure_r_port(tty, info, NULL); return 0; @@ -1325,8 +1335,6 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file, if (cmd != RCKP_GET_PORTS && rocket_paranoia_check(info, "rp_ioctl")) return -ENXIO; - lock_kernel(); - switch (cmd) { case RCKP_GET_STRUCT: if (copy_to_user(argp, info, sizeof (struct r_port))) @@ -1350,7 +1358,6 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file, default: ret = -ENOIOCTLCMD; } - unlock_kernel(); return ret; } @@ -1471,7 +1478,6 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout) jiffies); printk(KERN_INFO "cps=%d...\n", info->cps); #endif - lock_kernel(); while (1) { txcnt = sGetTxCnt(cp); if (!txcnt) { @@ -1499,7 +1505,6 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout) break; } __set_current_state(TASK_RUNNING); - unlock_kernel(); #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies); #endif @@ -1512,6 +1517,7 @@ static void rp_hangup(struct tty_struct *tty) { CHANNEL_t *cp; struct r_port *info = tty->driver_data; + unsigned long flags; if (rocket_paranoia_check(info, "rp_hangup")) return; @@ -1520,11 +1526,15 @@ static void rp_hangup(struct tty_struct *tty) printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line); #endif rp_flush_buffer(tty); - if (info->port.flags & ASYNC_CLOSING) + spin_lock_irqsave(&info->port.lock, flags); + if (info->port.flags & ASYNC_CLOSING) { + spin_unlock_irqrestore(&info->port.lock, flags); return; + } if (info->port.count) atomic_dec(&rp_num_ports_open); clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); + spin_unlock_irqrestore(&info->port.lock, flags); tty_port_hangup(&info->port); @@ -1535,7 +1545,7 @@ static void rp_hangup(struct tty_struct *tty) sDisCTSFlowCtl(cp); sDisTxSoftFlowCtl(cp); sClrTxXOFF(cp); - info->port.flags &= ~ASYNC_INITIALIZED; + clear_bit(ASYNCB_INITIALIZED, &info->port.flags); wake_up_interruptible(&info->port.open_wait); } diff --git a/drivers/char/selection.c b/drivers/char/selection.c index f97b9e848064..ebae344ce910 100644 --- a/drivers/char/selection.c +++ b/drivers/char/selection.c @@ -26,6 +26,7 @@ #include <linux/selection.h> #include <linux/tiocl.h> #include <linux/console.h> +#include <linux/smp_lock.h> /* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */ #define isspace(c) ((c) == ' ') @@ -312,12 +313,20 @@ int paste_selection(struct tty_struct *tty) struct tty_ldisc *ld; DECLARE_WAITQUEUE(wait, current); + /* always called with BTM from vt_ioctl */ + WARN_ON(!tty_locked()); + acquire_console_sem(); poke_blanked_console(); release_console_sem(); - ld = tty_ldisc_ref_wait(tty); - + ld = tty_ldisc_ref(tty); + if (!ld) { + tty_unlock(); + ld = tty_ldisc_ref_wait(tty); + tty_lock(); + } + add_wait_queue(&vc->paste_wait, &wait); while (sel_buffer && sel_buffer_lth > pasted) { set_current_state(TASK_INTERRUPTIBLE); diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c index ecbe479c7d68..f646725bd567 100644 --- a/drivers/char/serial167.c +++ b/drivers/char/serial167.c @@ -1505,7 +1505,7 @@ cy_ioctl(struct tty_struct *tty, struct file *file, printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */ #endif - lock_kernel(); + tty_lock(); switch (cmd) { case CYGETMON: @@ -1561,7 +1561,7 @@ cy_ioctl(struct tty_struct *tty, struct file *file, default: ret_val = -ENOIOCTLCMD; } - unlock_kernel(); + tty_unlock(); #ifdef SERIAL_DEBUG_OTHER printk("cy_ioctl done\n"); @@ -1786,7 +1786,9 @@ block_til_ready(struct tty_struct *tty, struct file *filp, tty->name, info->count); /**/ #endif - schedule(); + tty_unlock(); + schedule(); + tty_lock(); } __set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c index 2c24fcdc722a..9f8495b4fc8f 100644 --- a/drivers/char/specialix.c +++ b/drivers/char/specialix.c @@ -1365,7 +1365,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, retval = -ERESTARTSYS; break; } + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); @@ -1863,8 +1865,7 @@ static int sx_set_serial_info(struct specialix_port *port, return -EFAULT; } - lock_kernel(); - + mutex_lock(&port->port.mutex); change_speed = ((port->port.flags & ASYNC_SPD_MASK) != (tmp.flags & ASYNC_SPD_MASK)); change_speed |= (tmp.custom_divisor != port->custom_divisor); @@ -1875,7 +1876,7 @@ static int sx_set_serial_info(struct specialix_port *port, ((tmp.flags & ~ASYNC_USR_MASK) != (port->port.flags & ~ASYNC_USR_MASK))) { func_exit(); - unlock_kernel(); + mutex_unlock(&port->port.mutex); return -EPERM; } port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | @@ -1892,7 +1893,7 @@ static int sx_set_serial_info(struct specialix_port *port, sx_change_speed(bp, port); func_exit(); - unlock_kernel(); + mutex_unlock(&port->port.mutex); return 0; } @@ -1906,7 +1907,7 @@ static int sx_get_serial_info(struct specialix_port *port, func_enter(); memset(&tmp, 0, sizeof(tmp)); - lock_kernel(); + mutex_lock(&port->port.mutex); tmp.type = PORT_CIRRUS; tmp.line = port - sx_port; tmp.port = bp->base; @@ -1917,7 +1918,7 @@ static int sx_get_serial_info(struct specialix_port *port, tmp.closing_wait = port->port.closing_wait * HZ/100; tmp.custom_divisor = port->custom_divisor; tmp.xmit_fifo_size = CD186x_NFIFO; - unlock_kernel(); + mutex_unlock(&port->port.mutex); if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { func_exit(); return -EFAULT; diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c index 6049fd731924..f2167f8e5aab 100644 --- a/drivers/char/stallion.c +++ b/drivers/char/stallion.c @@ -807,7 +807,6 @@ static void stl_waituntilsent(struct tty_struct *tty, int timeout) timeout = HZ; tend = jiffies + timeout; - lock_kernel(); while (stl_datastate(portp)) { if (signal_pending(current)) break; @@ -815,7 +814,6 @@ static void stl_waituntilsent(struct tty_struct *tty, int timeout) if (time_after_eq(jiffies, tend)) break; } - unlock_kernel(); } /*****************************************************************************/ @@ -1029,6 +1027,8 @@ static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); memset(&sio, 0, sizeof(struct serial_struct)); + + mutex_lock(&portp->port.mutex); sio.line = portp->portnr; sio.port = portp->ioaddr; sio.flags = portp->port.flags; @@ -1048,6 +1048,7 @@ static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) brdp = stl_brds[portp->brdnr]; if (brdp != NULL) sio.irq = brdp->irq; + mutex_unlock(&portp->port.mutex); return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; } @@ -1069,12 +1070,15 @@ static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) return -EFAULT; + mutex_lock(&portp->port.mutex); if (!capable(CAP_SYS_ADMIN)) { if ((sio.baud_base != portp->baud_base) || (sio.close_delay != portp->close_delay) || ((sio.flags & ~ASYNC_USR_MASK) != - (portp->port.flags & ~ASYNC_USR_MASK))) + (portp->port.flags & ~ASYNC_USR_MASK))) { + mutex_unlock(&portp->port.mutex); return -EPERM; + } } portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) | @@ -1083,6 +1087,7 @@ static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp portp->close_delay = sio.close_delay; portp->closing_wait = sio.closing_wait; portp->custom_divisor = sio.custom_divisor; + mutex_unlock(&portp->port.mutex); stl_setport(portp, tty->termios); return 0; } @@ -1147,8 +1152,6 @@ static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd rc = 0; - lock_kernel(); - switch (cmd) { case TIOCGSERIAL: rc = stl_getserial(portp, argp); @@ -1173,7 +1176,6 @@ static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd rc = -ENOIOCTLCMD; break; } - unlock_kernel(); return rc; } @@ -2327,6 +2329,7 @@ static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comst return -ENODEV; } + mutex_lock(&portp->port.mutex); portp->stats.state = portp->istate; portp->stats.flags = portp->port.flags; portp->stats.hwid = portp->hwid; @@ -2358,6 +2361,7 @@ static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comst (STL_TXBUFSIZE - (tail - head)); portp->stats.signals = (unsigned long) stl_getsignals(portp); + mutex_unlock(&portp->port.mutex); return copy_to_user(cp, &portp->stats, sizeof(comstats_t)) ? -EFAULT : 0; @@ -2382,10 +2386,12 @@ static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) return -ENODEV; } + mutex_lock(&portp->port.mutex); memset(&portp->stats, 0, sizeof(comstats_t)); portp->stats.brd = portp->brdnr; portp->stats.panel = portp->panelnr; portp->stats.port = portp->portnr; + mutex_unlock(&portp->port.mutex); return copy_to_user(cp, &portp->stats, sizeof(comstats_t)) ? -EFAULT : 0; } @@ -2451,7 +2457,6 @@ static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) return -ENODEV; rc = 0; - lock_kernel(); switch (cmd) { case COM_GETPORTSTATS: rc = stl_getportstats(NULL, NULL, argp); @@ -2472,7 +2477,6 @@ static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) rc = -ENOIOCTLCMD; break; } - unlock_kernel(); return rc; } diff --git a/drivers/char/sx.c b/drivers/char/sx.c index a81ec4fcf6ff..5b24db4ff7f1 100644 --- a/drivers/char/sx.c +++ b/drivers/char/sx.c @@ -1699,7 +1699,7 @@ static long sx_fw_ioctl(struct file *filp, unsigned int cmd, if (!capable(CAP_SYS_RAWIO)) return -EPERM; - lock_kernel(); + tty_lock(); sx_dprintk(SX_DEBUG_FIRMWARE, "IOCTL %x: %lx\n", cmd, arg); @@ -1848,7 +1848,7 @@ static long sx_fw_ioctl(struct file *filp, unsigned int cmd, break; } out: - unlock_kernel(); + tty_unlock(); func_exit(); return rc; } @@ -1859,7 +1859,7 @@ static int sx_break(struct tty_struct *tty, int flag) int rv; func_enter(); - lock_kernel(); + tty_lock(); if (flag) rv = sx_send_command(port, HS_START, -1, HS_IDLE_BREAK); @@ -1868,7 +1868,7 @@ static int sx_break(struct tty_struct *tty, int flag) if (rv != 1) printk(KERN_ERR "sx: couldn't send break (%x).\n", read_sx_byte(port->board, CHAN_OFFSET(port, hi_hstat))); - unlock_kernel(); + tty_unlock(); func_exit(); return 0; } @@ -1909,7 +1909,7 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp, /* func_enter2(); */ rc = 0; - lock_kernel(); + tty_lock(); switch (cmd) { case TIOCGSERIAL: rc = gs_getserial(&port->gs, argp); @@ -1921,7 +1921,7 @@ static int sx_ioctl(struct tty_struct *tty, struct file *filp, rc = -ENOIOCTLCMD; break; } - unlock_kernel(); + tty_unlock(); /* func_exit(); */ return rc; diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c index 0658fc548222..a2a58004e188 100644 --- a/drivers/char/synclink.c +++ b/drivers/char/synclink.c @@ -81,7 +81,6 @@ #include <linux/mm.h> #include <linux/seq_file.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/vmalloc.h> @@ -2436,7 +2435,9 @@ static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user * if (!user_icount) { memset(&info->icount, 0, sizeof(info->icount)); } else { + mutex_lock(&info->port.mutex); COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); + mutex_unlock(&info->port.mutex); if (err) return -EFAULT; } @@ -2461,7 +2462,9 @@ static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_p printk("%s(%d):mgsl_get_params(%s)\n", __FILE__,__LINE__, info->device_name); + mutex_lock(&info->port.mutex); COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); + mutex_unlock(&info->port.mutex); if (err) { if ( debug_level >= DEBUG_LEVEL_INFO ) printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n", @@ -2501,11 +2504,13 @@ static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_pa return -EFAULT; } + mutex_lock(&info->port.mutex); spin_lock_irqsave(&info->irq_spinlock,flags); memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); spin_unlock_irqrestore(&info->irq_spinlock,flags); mgsl_change_params(info); + mutex_unlock(&info->port.mutex); return 0; @@ -2935,7 +2940,6 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) { struct mgsl_struct * info = tty->driver_data; - int ret; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__, @@ -2950,10 +2954,7 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file, return -EIO; } - lock_kernel(); - ret = mgsl_ioctl_common(info, cmd, arg); - unlock_kernel(); - return ret; + return mgsl_ioctl_common(info, cmd, arg); } static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg) @@ -3109,12 +3110,14 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp) if (tty_port_close_start(&info->port, tty, filp) == 0) goto cleanup; - + + mutex_lock(&info->port.mutex); if (info->port.flags & ASYNC_INITIALIZED) mgsl_wait_until_sent(tty, info->timeout); mgsl_flush_buffer(tty); tty_ldisc_flush(tty); shutdown(info); + mutex_unlock(&info->port.mutex); tty_port_close_end(&info->port, tty); info->port.tty = NULL; @@ -3162,7 +3165,6 @@ static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) * Note: use tight timings here to satisfy the NIST-PCTS. */ - lock_kernel(); if ( info->params.data_rate ) { char_time = info->timeout/(32 * 5); if (!char_time) @@ -3192,7 +3194,6 @@ static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) break; } } - unlock_kernel(); exit: if (debug_level >= DEBUG_LEVEL_INFO) @@ -3348,7 +3349,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("%s(%d):block_til_ready blocking on %s count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 334cf5c8c8b6..fef80cfcab5c 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -40,8 +40,8 @@ #define DBGBH(fmt) if (debug_level >= DEBUG_LEVEL_BH) printk fmt #define DBGISR(fmt) if (debug_level >= DEBUG_LEVEL_ISR) printk fmt #define DBGDATA(info, buf, size, label) if (debug_level >= DEBUG_LEVEL_DATA) trace_block((info), (buf), (size), (label)) -//#define DBGTBUF(info) dump_tbufs(info) -//#define DBGRBUF(info) dump_rbufs(info) +/*#define DBGTBUF(info) dump_tbufs(info)*/ +/*#define DBGRBUF(info) dump_rbufs(info)*/ #include <linux/module.h> @@ -62,7 +62,6 @@ #include <linux/mm.h> #include <linux/seq_file.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/netdevice.h> #include <linux/vmalloc.h> #include <linux/init.h> @@ -676,12 +675,14 @@ static int open(struct tty_struct *tty, struct file *filp) goto cleanup; } + mutex_lock(&info->port.mutex); info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; spin_lock_irqsave(&info->netlock, flags); if (info->netcount) { retval = -EBUSY; spin_unlock_irqrestore(&info->netlock, flags); + mutex_unlock(&info->port.mutex); goto cleanup; } info->port.count++; @@ -693,7 +694,7 @@ static int open(struct tty_struct *tty, struct file *filp) if (retval < 0) goto cleanup; } - + mutex_unlock(&info->port.mutex); retval = block_til_ready(tty, filp, info); if (retval) { DBGINFO(("%s block_til_ready rc=%d\n", info->device_name, retval)); @@ -725,12 +726,14 @@ static void close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(&info->port, tty, filp) == 0) goto cleanup; + mutex_lock(&info->port.mutex); if (info->port.flags & ASYNC_INITIALIZED) wait_until_sent(tty, info->timeout); flush_buffer(tty); tty_ldisc_flush(tty); shutdown(info); + mutex_unlock(&info->port.mutex); tty_port_close_end(&info->port, tty); info->port.tty = NULL; @@ -741,17 +744,23 @@ cleanup: static void hangup(struct tty_struct *tty) { struct slgt_info *info = tty->driver_data; + unsigned long flags; if (sanity_check(info, tty->name, "hangup")) return; DBGINFO(("%s hangup\n", info->device_name)); flush_buffer(tty); + + mutex_lock(&info->port.mutex); shutdown(info); + spin_lock_irqsave(&info->port.lock, flags); info->port.count = 0; info->port.flags &= ~ASYNC_NORMAL_ACTIVE; info->port.tty = NULL; + spin_unlock_irqrestore(&info->port.lock, flags); + mutex_unlock(&info->port.mutex); wake_up_interruptible(&info->port.open_wait); } @@ -901,8 +910,6 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) * Note: use tight timings here to satisfy the NIST-PCTS. */ - lock_kernel(); - if (info->params.data_rate) { char_time = info->timeout/(32 * 5); if (!char_time) @@ -920,8 +927,6 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) if (timeout && time_after(jiffies, orig_jiffies + timeout)) break; } - unlock_kernel(); - exit: DBGINFO(("%s wait_until_sent exit\n", info->device_name)); } @@ -1041,8 +1046,37 @@ static int ioctl(struct tty_struct *tty, struct file *file, return -EIO; } - lock_kernel(); - + switch (cmd) { + case MGSL_IOCWAITEVENT: + return wait_mgsl_event(info, argp); + case TIOCMIWAIT: + return modem_input_wait(info,(int)arg); + case TIOCGICOUNT: + spin_lock_irqsave(&info->lock,flags); + cnow = info->icount; + spin_unlock_irqrestore(&info->lock,flags); + p_cuser = argp; + if (put_user(cnow.cts, &p_cuser->cts) || + put_user(cnow.dsr, &p_cuser->dsr) || + put_user(cnow.rng, &p_cuser->rng) || + put_user(cnow.dcd, &p_cuser->dcd) || + put_user(cnow.rx, &p_cuser->rx) || + put_user(cnow.tx, &p_cuser->tx) || + put_user(cnow.frame, &p_cuser->frame) || + put_user(cnow.overrun, &p_cuser->overrun) || + put_user(cnow.parity, &p_cuser->parity) || + put_user(cnow.brk, &p_cuser->brk) || + put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) + return -EFAULT; + return 0; + case MGSL_IOCSGPIO: + return set_gpio(info, argp); + case MGSL_IOCGGPIO: + return get_gpio(info, argp); + case MGSL_IOCWAITGPIO: + return wait_gpio(info, argp); + } + mutex_lock(&info->port.mutex); switch (cmd) { case MGSL_IOCGPARAMS: ret = get_params(info, argp); @@ -1068,50 +1102,16 @@ static int ioctl(struct tty_struct *tty, struct file *file, case MGSL_IOCGSTATS: ret = get_stats(info, argp); break; - case MGSL_IOCWAITEVENT: - ret = wait_mgsl_event(info, argp); - break; - case TIOCMIWAIT: - ret = modem_input_wait(info,(int)arg); - break; case MGSL_IOCGIF: ret = get_interface(info, argp); break; case MGSL_IOCSIF: ret = set_interface(info,(int)arg); break; - case MGSL_IOCSGPIO: - ret = set_gpio(info, argp); - break; - case MGSL_IOCGGPIO: - ret = get_gpio(info, argp); - break; - case MGSL_IOCWAITGPIO: - ret = wait_gpio(info, argp); - break; - case TIOCGICOUNT: - spin_lock_irqsave(&info->lock,flags); - cnow = info->icount; - spin_unlock_irqrestore(&info->lock,flags); - p_cuser = argp; - if (put_user(cnow.cts, &p_cuser->cts) || - put_user(cnow.dsr, &p_cuser->dsr) || - put_user(cnow.rng, &p_cuser->rng) || - put_user(cnow.dcd, &p_cuser->dcd) || - put_user(cnow.rx, &p_cuser->rx) || - put_user(cnow.tx, &p_cuser->tx) || - put_user(cnow.frame, &p_cuser->frame) || - put_user(cnow.overrun, &p_cuser->overrun) || - put_user(cnow.parity, &p_cuser->parity) || - put_user(cnow.brk, &p_cuser->brk) || - put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) - ret = -EFAULT; - ret = 0; - break; default: ret = -ENOIOCTLCMD; } - unlock_kernel(); + mutex_unlock(&info->port.mutex); return ret; } @@ -3244,7 +3244,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } DBGINFO(("%s block_til_ready wait\n", tty->driver->name)); + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c index 2b18adc4ee19..e56caf7d82aa 100644 --- a/drivers/char/synclinkmp.c +++ b/drivers/char/synclinkmp.c @@ -52,7 +52,6 @@ #include <linux/mm.h> #include <linux/seq_file.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/netdevice.h> #include <linux/vmalloc.h> #include <linux/init.h> @@ -813,13 +812,15 @@ static void close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(&info->port, tty, filp) == 0) goto cleanup; - + + mutex_lock(&info->port.mutex); if (info->port.flags & ASYNC_INITIALIZED) wait_until_sent(tty, info->timeout); flush_buffer(tty); tty_ldisc_flush(tty); shutdown(info); + mutex_unlock(&info->port.mutex); tty_port_close_end(&info->port, tty); info->port.tty = NULL; @@ -835,6 +836,7 @@ cleanup: static void hangup(struct tty_struct *tty) { SLMP_INFO *info = tty->driver_data; + unsigned long flags; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s hangup()\n", @@ -843,12 +845,16 @@ static void hangup(struct tty_struct *tty) if (sanity_check(info, tty->name, "hangup")) return; + mutex_lock(&info->port.mutex); flush_buffer(tty); shutdown(info); + spin_lock_irqsave(&info->port.lock, flags); info->port.count = 0; info->port.flags &= ~ASYNC_NORMAL_ACTIVE; info->port.tty = NULL; + spin_unlock_irqrestore(&info->port.lock, flags); + mutex_unlock(&info->port.mutex); wake_up_interruptible(&info->port.open_wait); } @@ -1062,9 +1068,7 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) if (sanity_check(info, tty->name, "wait_until_sent")) return; - lock_kernel(); - - if (!(info->port.flags & ASYNC_INITIALIZED)) + if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags)) goto exit; orig_jiffies = jiffies; @@ -1094,8 +1098,10 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) break; } } else { - //TODO: determine if there is something similar to USC16C32 - // TXSTATUS_ALL_SENT status + /* + * TODO: determine if there is something similar to USC16C32 + * TXSTATUS_ALL_SENT status + */ while ( info->tx_active && info->tx_enabled) { msleep_interruptible(jiffies_to_msecs(char_time)); if (signal_pending(current)) @@ -1106,7 +1112,6 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) } exit: - unlock_kernel(); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s wait_until_sent() exit\n", __FILE__,__LINE__, info->device_name ); @@ -1122,7 +1127,6 @@ static int write_room(struct tty_struct *tty) if (sanity_check(info, tty->name, "write_room")) return 0; - lock_kernel(); if (info->params.mode == MGSL_MODE_HDLC) { ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; } else { @@ -1130,7 +1134,6 @@ static int write_room(struct tty_struct *tty) if (ret < 0) ret = 0; } - unlock_kernel(); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s write_room()=%d\n", @@ -1251,7 +1254,7 @@ static void tx_release(struct tty_struct *tty) * * Return Value: 0 if success, otherwise error code */ -static int do_ioctl(struct tty_struct *tty, struct file *file, +static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { SLMP_INFO *info = tty->driver_data; @@ -1341,16 +1344,6 @@ static int do_ioctl(struct tty_struct *tty, struct file *file, return 0; } -static int ioctl(struct tty_struct *tty, struct file *file, - unsigned int cmd, unsigned long arg) -{ - int ret; - lock_kernel(); - ret = do_ioctl(tty, file, cmd, arg); - unlock_kernel(); - return ret; -} - /* * /proc fs routines.... */ @@ -2883,7 +2876,9 @@ static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount) if (!user_icount) { memset(&info->icount, 0, sizeof(info->icount)); } else { + mutex_lock(&info->port.mutex); COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); + mutex_unlock(&info->port.mutex); if (err) return -EFAULT; } @@ -2898,7 +2893,9 @@ static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params) printk("%s(%d):%s get_params()\n", __FILE__,__LINE__, info->device_name); + mutex_lock(&info->port.mutex); COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); + mutex_unlock(&info->port.mutex); if (err) { if ( debug_level >= DEBUG_LEVEL_INFO ) printk( "%s(%d):%s get_params() user buffer copy failed\n", @@ -2926,11 +2923,13 @@ static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params) return -EFAULT; } + mutex_lock(&info->port.mutex); spin_lock_irqsave(&info->lock,flags); memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); spin_unlock_irqrestore(&info->lock,flags); change_params(info); + mutex_unlock(&info->port.mutex); return 0; } @@ -3366,7 +3365,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, printk("%s(%d):%s block_til_ready() count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 507441ac6edb..0350c42375a2 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -149,6 +149,7 @@ static long tty_compat_ioctl(struct file *file, unsigned int cmd, #else #define tty_compat_ioctl NULL #endif +static int __tty_fasync(int fd, struct file *filp, int on); static int tty_fasync(int fd, struct file *filp, int on); static void release_tty(struct tty_struct *tty, int idx); static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); @@ -470,7 +471,7 @@ void tty_wakeup(struct tty_struct *tty) EXPORT_SYMBOL_GPL(tty_wakeup); /** - * do_tty_hangup - actual handler for hangup events + * __tty_hangup - actual handler for hangup events * @work: tty device * * This can be called by the "eventd" kernel thread. That is process @@ -483,7 +484,7 @@ EXPORT_SYMBOL_GPL(tty_wakeup); * remains intact. * * Locking: - * BKL + * BTM * redirect lock for undoing redirection * file list lock for manipulating list of ttys * tty_ldisc_lock from called functions @@ -491,10 +492,8 @@ EXPORT_SYMBOL_GPL(tty_wakeup); * tasklist_lock to walk task list for hangup event * ->siglock to protect ->signal/->sighand */ -static void do_tty_hangup(struct work_struct *work) +void __tty_hangup(struct tty_struct *tty) { - struct tty_struct *tty = - container_of(work, struct tty_struct, hangup_work); struct file *cons_filp = NULL; struct file *filp, *f = NULL; struct task_struct *p; @@ -513,9 +512,12 @@ static void do_tty_hangup(struct work_struct *work) } spin_unlock(&redirect_lock); - /* inuse_filps is protected by the single kernel lock */ - lock_kernel(); - check_tty_count(tty, "do_tty_hangup"); + tty_lock(); + + /* inuse_filps is protected by the single tty lock, + this really needs to change if we want to flush the + workqueue with the lock held */ + check_tty_count(tty, "tty_hangup"); file_list_lock(); /* This breaks for file handles being sent over AF_UNIX sockets ? */ @@ -525,7 +527,7 @@ static void do_tty_hangup(struct work_struct *work) if (filp->f_op->write != tty_write) continue; closecount++; - tty_fasync(-1, filp, 0); /* can't block */ + __tty_fasync(-1, filp, 0); /* can't block */ filp->f_op = &hung_up_tty_fops; } file_list_unlock(); @@ -594,11 +596,21 @@ static void do_tty_hangup(struct work_struct *work) */ set_bit(TTY_HUPPED, &tty->flags); tty_ldisc_enable(tty); - unlock_kernel(); + + tty_unlock(); + if (f) fput(f); } +static void do_tty_hangup(struct work_struct *work) +{ + struct tty_struct *tty = + container_of(work, struct tty_struct, hangup_work); + + __tty_hangup(tty); +} + /** * tty_hangup - trigger a hangup event * @tty: tty to hangup @@ -634,11 +646,12 @@ void tty_vhangup(struct tty_struct *tty) printk(KERN_DEBUG "%s vhangup...\n", tty_name(tty, buf)); #endif - do_tty_hangup(&tty->hangup_work); + __tty_hangup(tty); } EXPORT_SYMBOL(tty_vhangup); + /** * tty_vhangup_self - process vhangup for own ctty * @@ -696,7 +709,8 @@ static void session_clear_tty(struct pid *session) * exiting; it is 0 if called by the ioctl TIOCNOTTY. * * Locking: - * BKL is taken for hysterical raisins + * BTM is taken for hysterical raisins, and held when + * called from no_tty(). * tty_mutex is taken to protect tty * ->siglock is taken to protect ->signal/->sighand * tasklist_lock is taken to walk process list for sessions @@ -714,10 +728,10 @@ void disassociate_ctty(int on_exit) tty = get_current_tty(); if (tty) { tty_pgrp = get_pid(tty->pgrp); - lock_kernel(); - if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY) - tty_vhangup(tty); - unlock_kernel(); + if (on_exit) { + if (tty->driver->type != TTY_DRIVER_TYPE_PTY) + tty_vhangup(tty); + } tty_kref_put(tty); } else if (on_exit) { struct pid *old_pgrp; @@ -774,9 +788,9 @@ void disassociate_ctty(int on_exit) void no_tty(void) { struct task_struct *tsk = current; - lock_kernel(); + tty_lock(); disassociate_ctty(0); - unlock_kernel(); + tty_unlock(); proc_clear_tty(tsk); } @@ -879,7 +893,7 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count, struct inode *inode; struct tty_ldisc *ld; - tty = (struct tty_struct *)file->private_data; + tty = file->private_data; inode = file->f_path.dentry->d_inode; if (tty_paranoia_check(tty, inode, "tty_read")) return -EIO; @@ -1013,19 +1027,19 @@ out: * We don't put it into the syslog queue right now maybe in the future if * really needed. * - * We must still hold the BKL and test the CLOSING flag for the moment. + * We must still hold the BTM and test the CLOSING flag for the moment. */ void tty_write_message(struct tty_struct *tty, char *msg) { if (tty) { mutex_lock(&tty->atomic_write_lock); - lock_kernel(); + tty_lock(); if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) { - unlock_kernel(); + tty_unlock(); tty->ops->write(tty, msg, strlen(msg)); } else - unlock_kernel(); + tty_unlock(); tty_write_unlock(tty); } return; @@ -1056,7 +1070,7 @@ static ssize_t tty_write(struct file *file, const char __user *buf, ssize_t ret; struct tty_ldisc *ld; - tty = (struct tty_struct *)file->private_data; + tty = file->private_data; if (tty_paranoia_check(tty, inode, "tty_write")) return -EIO; if (!tty || !tty->ops->write || @@ -1208,18 +1222,14 @@ static int tty_driver_install_tty(struct tty_driver *driver, int ret; if (driver->ops->install) { - lock_kernel(); ret = driver->ops->install(driver, tty); - unlock_kernel(); return ret; } if (tty_init_termios(tty) == 0) { - lock_kernel(); tty_driver_kref_get(driver); tty->count++; driver->ttys[idx] = tty; - unlock_kernel(); return 0; } return -ENOMEM; @@ -1312,14 +1322,11 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, struct tty_struct *tty; int retval; - lock_kernel(); /* Check if pty master is being opened multiple times */ if (driver->subtype == PTY_TYPE_MASTER && (driver->flags & TTY_DRIVER_DEVPTS_MEM) && !first_ok) { - unlock_kernel(); return ERR_PTR(-EIO); } - unlock_kernel(); /* * First time open is complex, especially for PTY devices. @@ -1363,9 +1370,7 @@ release_mem_out: if (printk_ratelimit()) printk(KERN_INFO "tty_init_dev: ldisc open failed, " "clearing slot %d\n", idx); - lock_kernel(); release_tty(tty, idx); - unlock_kernel(); return ERR_PTR(retval); } @@ -1508,14 +1513,14 @@ int tty_release(struct inode *inode, struct file *filp) int idx; char buf[64]; - tty = (struct tty_struct *)filp->private_data; + tty = filp->private_data; if (tty_paranoia_check(tty, inode, "tty_release_dev")) return 0; - lock_kernel(); + tty_lock(); check_tty_count(tty, "tty_release_dev"); - tty_fasync(-1, filp, 0); + __tty_fasync(-1, filp, 0); idx = tty->index; pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY && @@ -1527,18 +1532,18 @@ int tty_release(struct inode *inode, struct file *filp) if (idx < 0 || idx >= tty->driver->num) { printk(KERN_DEBUG "tty_release_dev: bad idx when trying to " "free (%s)\n", tty->name); - unlock_kernel(); + tty_unlock(); return 0; } if (!devpts) { if (tty != tty->driver->ttys[idx]) { - unlock_kernel(); + tty_unlock(); printk(KERN_DEBUG "tty_release_dev: driver.table[%d] not tty " "for (%s)\n", idx, tty->name); return 0; } if (tty->termios != tty->driver->termios[idx]) { - unlock_kernel(); + tty_unlock(); printk(KERN_DEBUG "tty_release_dev: driver.termios[%d] not termios " "for (%s)\n", idx, tty->name); @@ -1556,21 +1561,21 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->driver->other && !(tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)) { if (o_tty != tty->driver->other->ttys[idx]) { - unlock_kernel(); + tty_unlock(); printk(KERN_DEBUG "tty_release_dev: other->table[%d] " "not o_tty for (%s)\n", idx, tty->name); return 0 ; } if (o_tty->termios != tty->driver->other->termios[idx]) { - unlock_kernel(); + tty_unlock(); printk(KERN_DEBUG "tty_release_dev: other->termios[%d] " "not o_termios for (%s)\n", idx, tty->name); return 0; } if (o_tty->link != tty) { - unlock_kernel(); + tty_unlock(); printk(KERN_DEBUG "tty_release_dev: bad pty pointers\n"); return 0; } @@ -1579,7 +1584,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->ops->close) tty->ops->close(tty, filp); - unlock_kernel(); + tty_unlock(); /* * Sanity check: if tty->count is going to zero, there shouldn't be * any waiters on tty->read_wait or tty->write_wait. We test the @@ -1602,7 +1607,7 @@ int tty_release(struct inode *inode, struct file *filp) opens on /dev/tty */ mutex_lock(&tty_mutex); - lock_kernel(); + tty_lock(); tty_closing = tty->count <= 1; o_tty_closing = o_tty && (o_tty->count <= (pty_master ? 1 : 0)); @@ -1633,7 +1638,7 @@ int tty_release(struct inode *inode, struct file *filp) printk(KERN_WARNING "tty_release_dev: %s: read/write wait queue " "active!\n", tty_name(tty, buf)); - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); schedule(); } @@ -1698,7 +1703,7 @@ int tty_release(struct inode *inode, struct file *filp) /* check whether both sides are closing ... */ if (!tty_closing || (o_tty && !o_tty_closing)) { - unlock_kernel(); + tty_unlock(); return 0; } @@ -1718,7 +1723,7 @@ int tty_release(struct inode *inode, struct file *filp) /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); - unlock_kernel(); + tty_unlock(); return 0; } @@ -1760,12 +1765,12 @@ retry_open: retval = 0; mutex_lock(&tty_mutex); - lock_kernel(); + tty_lock(); if (device == MKDEV(TTYAUX_MAJOR, 0)) { tty = get_current_tty(); if (!tty) { - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); return -ENXIO; } @@ -1797,14 +1802,14 @@ retry_open: goto got_driver; } } - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); return -ENODEV; } driver = get_tty_driver(device, &index); if (!driver) { - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); return -ENODEV; } @@ -1814,7 +1819,7 @@ got_driver: tty = tty_driver_lookup_tty(driver, inode, index); if (IS_ERR(tty)) { - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); return PTR_ERR(tty); } @@ -1830,7 +1835,7 @@ got_driver: mutex_unlock(&tty_mutex); tty_driver_kref_put(driver); if (IS_ERR(tty)) { - unlock_kernel(); + tty_unlock(); return PTR_ERR(tty); } @@ -1860,29 +1865,29 @@ got_driver: printk(KERN_DEBUG "error %d in opening %s...", retval, tty->name); #endif + tty_unlock(); /* need to call tty_release without BTM */ tty_release(inode, filp); - if (retval != -ERESTARTSYS) { - unlock_kernel(); + if (retval != -ERESTARTSYS) return retval; - } - if (signal_pending(current)) { - unlock_kernel(); + + if (signal_pending(current)) return retval; - } + schedule(); /* * Need to reset f_op in case a hangup happened. */ + tty_lock(); if (filp->f_op == &hung_up_tty_fops) filp->f_op = &tty_fops; - unlock_kernel(); + tty_unlock(); goto retry_open; } - unlock_kernel(); + tty_unlock(); mutex_lock(&tty_mutex); - lock_kernel(); + tty_lock(); spin_lock_irq(¤t->sighand->siglock); if (!noctty && current->signal->leader && @@ -1890,7 +1895,7 @@ got_driver: tty->session == NULL) __proc_set_tty(current, tty); spin_unlock_irq(¤t->sighand->siglock); - unlock_kernel(); + tty_unlock(); mutex_unlock(&tty_mutex); return 0; } @@ -1915,7 +1920,7 @@ static unsigned int tty_poll(struct file *filp, poll_table *wait) struct tty_ldisc *ld; int ret = 0; - tty = (struct tty_struct *)filp->private_data; + tty = filp->private_data; if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_poll")) return 0; @@ -1926,14 +1931,13 @@ static unsigned int tty_poll(struct file *filp, poll_table *wait) return ret; } -static int tty_fasync(int fd, struct file *filp, int on) +static int __tty_fasync(int fd, struct file *filp, int on) { struct tty_struct *tty; unsigned long flags; int retval = 0; - lock_kernel(); - tty = (struct tty_struct *)filp->private_data; + tty = filp->private_data; if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync")) goto out; @@ -1966,7 +1970,15 @@ static int tty_fasync(int fd, struct file *filp, int on) } retval = 0; out: - unlock_kernel(); + return retval; +} + +static int tty_fasync(int fd, struct file *filp, int on) +{ + int retval; + tty_lock(); + retval = __tty_fasync(fd, filp, on); + tty_unlock(); return retval; } @@ -2485,7 +2497,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg) struct tty_ldisc *ld; struct inode *inode = file->f_dentry->d_inode; - tty = (struct tty_struct *)file->private_data; + tty = file->private_data; if (tty_paranoia_check(tty, inode, "tty_ioctl")) return -EINVAL; diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index 6bd5f8866c74..0c1889971459 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -517,19 +517,25 @@ static void change_termios(struct tty_struct *tty, struct ktermios *new_termios) /* See if packet mode change of state. */ if (tty->link && tty->link->packet) { + int extproc = (old_termios.c_lflag & EXTPROC) | + (tty->termios->c_lflag & EXTPROC); int old_flow = ((old_termios.c_iflag & IXON) && (old_termios.c_cc[VSTOP] == '\023') && (old_termios.c_cc[VSTART] == '\021')); int new_flow = (I_IXON(tty) && STOP_CHAR(tty) == '\023' && START_CHAR(tty) == '\021'); - if (old_flow != new_flow) { + if ((old_flow != new_flow) || extproc) { spin_lock_irqsave(&tty->ctrl_lock, flags); - tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP); - if (new_flow) - tty->ctrl_status |= TIOCPKT_DOSTOP; - else - tty->ctrl_status |= TIOCPKT_NOSTOP; + if (old_flow != new_flow) { + tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP); + if (new_flow) + tty->ctrl_status |= TIOCPKT_DOSTOP; + else + tty->ctrl_status |= TIOCPKT_NOSTOP; + } + if (extproc) + tty->ctrl_status |= TIOCPKT_IOCTL; spin_unlock_irqrestore(&tty->ctrl_lock, flags); wake_up_interruptible(&tty->link->read_wait); } diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c index 500e740ec5e4..412f9775d19c 100644 --- a/drivers/char/tty_ldisc.c +++ b/drivers/char/tty_ldisc.c @@ -440,6 +440,8 @@ static void tty_set_termios_ldisc(struct tty_struct *tty, int num) * * A helper opening method. Also a convenient debugging and check * point. + * + * Locking: always called with BTM already held. */ static int tty_ldisc_open(struct tty_struct *tty, struct tty_ldisc *ld) @@ -447,10 +449,9 @@ static int tty_ldisc_open(struct tty_struct *tty, struct tty_ldisc *ld) WARN_ON(test_and_set_bit(TTY_LDISC_OPEN, &tty->flags)); if (ld->ops->open) { int ret; - /* BKL here locks verus a hangup event */ - lock_kernel(); + /* BTM here locks versus a hangup event */ + WARN_ON(!tty_locked()); ret = ld->ops->open(tty); - unlock_kernel(); return ret; } return 0; @@ -553,7 +554,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) if (IS_ERR(new_ldisc)) return PTR_ERR(new_ldisc); - lock_kernel(); + tty_lock(); /* * We need to look at the tty locking here for pty/tty pairs * when both sides try to change in parallel. @@ -567,12 +568,12 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) */ if (tty->ldisc->ops->num == ldisc) { - unlock_kernel(); + tty_unlock(); tty_ldisc_put(new_ldisc); return 0; } - unlock_kernel(); + tty_unlock(); /* * Problem: What do we do if this blocks ? * We could deadlock here @@ -580,6 +581,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) tty_wait_until_sent(tty, 0); + tty_lock(); mutex_lock(&tty->ldisc_mutex); /* @@ -589,13 +591,13 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) while (test_bit(TTY_LDISC_CHANGING, &tty->flags)) { mutex_unlock(&tty->ldisc_mutex); + tty_unlock(); wait_event(tty_ldisc_wait, test_bit(TTY_LDISC_CHANGING, &tty->flags) == 0); + tty_lock(); mutex_lock(&tty->ldisc_mutex); } - lock_kernel(); - set_bit(TTY_LDISC_CHANGING, &tty->flags); /* @@ -607,7 +609,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) o_ldisc = tty->ldisc; - unlock_kernel(); + tty_unlock(); /* * Make sure we don't change while someone holds a * reference to the line discipline. The TTY_LDISC bit @@ -632,15 +634,15 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) flush_scheduled_work(); + tty_lock(); mutex_lock(&tty->ldisc_mutex); - lock_kernel(); if (test_bit(TTY_HUPPED, &tty->flags)) { /* We were raced by the hangup method. It will have stomped the ldisc data and closed the ldisc down */ clear_bit(TTY_LDISC_CHANGING, &tty->flags); mutex_unlock(&tty->ldisc_mutex); tty_ldisc_put(new_ldisc); - unlock_kernel(); + tty_unlock(); return -EIO; } @@ -682,7 +684,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) if (o_work) schedule_delayed_work(&o_tty->buf.work, 1); mutex_unlock(&tty->ldisc_mutex); - unlock_kernel(); + tty_unlock(); return retval; } @@ -780,7 +782,20 @@ void tty_ldisc_hangup(struct tty_struct *tty) * Avoid racing set_ldisc or tty_ldisc_release */ mutex_lock(&tty->ldisc_mutex); - tty_ldisc_halt(tty); + + /* + * this is like tty_ldisc_halt, but we need to give up + * the BTM before calling cancel_delayed_work_sync, + * which may need to wait for another function taking the BTM + */ + clear_bit(TTY_LDISC, &tty->flags); + tty_unlock(); + cancel_delayed_work_sync(&tty->buf.work); + mutex_unlock(&tty->ldisc_mutex); + + tty_lock(); + mutex_lock(&tty->ldisc_mutex); + /* At this point we have a closed ldisc and we want to reopen it. We could defer this to the next open but it means auditing a lot of other paths so this is @@ -851,8 +866,10 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) * race with the set_ldisc code path. */ + tty_unlock(); tty_ldisc_halt(tty); flush_scheduled_work(); + tty_lock(); mutex_lock(&tty->ldisc_mutex); /* diff --git a/drivers/char/tty_mutex.c b/drivers/char/tty_mutex.c new file mode 100644 index 000000000000..133697540c73 --- /dev/null +++ b/drivers/char/tty_mutex.c @@ -0,0 +1,47 @@ +/* + * drivers/char/tty_lock.c + */ +#include <linux/tty.h> +#include <linux/module.h> +#include <linux/kallsyms.h> +#include <linux/semaphore.h> +#include <linux/sched.h> + +/* + * The 'big tty mutex' + * + * This mutex is taken and released by tty_lock() and tty_unlock(), + * replacing the older big kernel lock. + * It can no longer be taken recursively, and does not get + * released implicitly while sleeping. + * + * Don't use in new code. + */ +static DEFINE_MUTEX(big_tty_mutex); +struct task_struct *__big_tty_mutex_owner; +EXPORT_SYMBOL_GPL(__big_tty_mutex_owner); + +/* + * Getting the big tty mutex. + */ +void __lockfunc tty_lock(void) +{ + struct task_struct *task = current; + + WARN_ON(__big_tty_mutex_owner == task); + + mutex_lock(&big_tty_mutex); + __big_tty_mutex_owner = task; +} +EXPORT_SYMBOL(tty_lock); + +void __lockfunc tty_unlock(void) +{ + struct task_struct *task = current; + + WARN_ON(__big_tty_mutex_owner != task); + __big_tty_mutex_owner = NULL; + + mutex_unlock(&big_tty_mutex); +} +EXPORT_SYMBOL(tty_unlock); diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c index a3bd1d0b66cf..33d37d230f8f 100644 --- a/drivers/char/tty_port.c +++ b/drivers/char/tty_port.c @@ -231,7 +231,7 @@ int tty_port_block_til_ready(struct tty_port *port, /* block if port is in the process of being closed */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { - wait_event_interruptible(port->close_wait, + wait_event_interruptible_tty(port->close_wait, !(port->flags & ASYNC_CLOSING)); if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; @@ -294,7 +294,9 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } + tty_unlock(); schedule(); + tty_lock(); } finish_wait(&port->open_wait, &wait); diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c index c1791a63d99d..bcce46c96b88 100644 --- a/drivers/char/vc_screen.c +++ b/drivers/char/vc_screen.c @@ -463,10 +463,10 @@ vcs_open(struct inode *inode, struct file *filp) unsigned int currcons = iminor(inode) & 127; int ret = 0; - lock_kernel(); + tty_lock(); if(currcons && !vc_cons_allocated(currcons-1)) ret = -ENXIO; - unlock_kernel(); + tty_unlock(); return ret; } diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 44f03ddd8871..c734f9b1263a 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -105,6 +105,7 @@ #include <asm/system.h> #include <linux/uaccess.h> #include <linux/kdb.h> +#include <linux/ctype.h> #define MAX_NR_CON_DRIVER 16 @@ -286,8 +287,12 @@ static inline unsigned short *screenpos(struct vc_data *vc, int offset, int view return p; } +/* Called from the keyboard irq path.. */ static inline void scrolldelta(int lines) { + /* FIXME */ + /* scrolldelta needs some kind of consistency lock, but the BKL was + and still is not protecting versus the scheduled back end */ scrollback_delta += lines; schedule_console_callback(); } @@ -704,7 +709,10 @@ void redraw_screen(struct vc_data *vc, int is_switch) update_attr(vc); clear_buffer_attributes(vc); } - if (update && vc->vc_mode != KD_GRAPHICS) + + /* Forcibly update if we're panicing */ + if ((update && vc->vc_mode != KD_GRAPHICS) || + vt_force_oops_output(vc)) do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); } set_cursor(vc); @@ -742,6 +750,7 @@ static void visual_init(struct vc_data *vc, int num, int init) vc->vc_hi_font_mask = 0; vc->vc_complement_mask = 0; vc->vc_can_do_color = 0; + vc->vc_panic_force_write = false; vc->vc_sw->con_init(vc, init); if (!vc->vc_complement_mask) vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; @@ -774,6 +783,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ if (!vc) return -ENOMEM; vc_cons[currcons].d = vc; + tty_port_init(&vc->port); INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); visual_init(vc, currcons, 1); if (!*vc->vc_uni_pagedir_loc) @@ -963,12 +973,12 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, * Resize a virtual console as seen from the console end of things. We * use the common vc_do_resize methods to update the structures. The * caller must hold the console sem to protect console internals and - * vc->vc_tty + * vc->port.tty */ int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) { - return vc_do_resize(vc->vc_tty, vc, cols, rows); + return vc_do_resize(vc->port.tty, vc, cols, rows); } /** @@ -1796,8 +1806,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_state = ESnormal; return; case ESpalette: - if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) { - vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0'); + if (isxdigit(c)) { + vc->vc_par[vc->vc_npar++] = hex_to_bin(c); if (vc->vc_npar == 7) { int i = vc->vc_par[0] * 3, j = 1; vc->vc_palette[i] = 16 * vc->vc_par[j++]; @@ -2505,7 +2515,7 @@ static void vt_console_print(struct console *co, const char *b, unsigned count) goto quit; } - if (vc->vc_mode != KD_TEXT) + if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) goto quit; /* undraw cursor first */ @@ -2611,8 +2621,6 @@ int tioclinux(struct tty_struct *tty, unsigned long arg) return -EFAULT; ret = 0; - lock_kernel(); - switch (type) { case TIOCL_SETSEL: @@ -2687,7 +2695,6 @@ int tioclinux(struct tty_struct *tty, unsigned long arg) ret = -EINVAL; break; } - unlock_kernel(); return ret; } @@ -2800,12 +2807,12 @@ static int con_open(struct tty_struct *tty, struct file *filp) struct vc_data *vc = vc_cons[currcons].d; /* Still being freed */ - if (vc->vc_tty) { + if (vc->port.tty) { release_console_sem(); return -ERESTARTSYS; } tty->driver_data = vc; - vc->vc_tty = tty; + vc->port.tty = tty; if (!tty->winsize.ws_row && !tty->winsize.ws_col) { tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; @@ -2833,7 +2840,7 @@ static void con_shutdown(struct tty_struct *tty) struct vc_data *vc = tty->driver_data; BUG_ON(vc == NULL); acquire_console_sem(); - vc->vc_tty = NULL; + vc->port.tty = NULL; release_console_sem(); tty_shutdown(tty); } @@ -2915,6 +2922,7 @@ static int __init con_init(void) for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); + tty_port_init(&vc->port); visual_init(vc, currcons, 1); vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); vc_init(vc, vc->vc_rows, vc->vc_cols, @@ -3783,7 +3791,8 @@ void do_unblank_screen(int leaving_gfx) return; } vc = vc_cons[fg_console].d; - if (vc->vc_mode != KD_TEXT) + /* Try to unblank in oops case too */ + if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) return; /* but leave console_blanked != 0 */ if (blankinterval) { @@ -3792,7 +3801,7 @@ void do_unblank_screen(int leaving_gfx) } console_blanked = 0; - if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) + if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) /* Low-level driver cannot restore -> do it ourselves */ update_screen(vc); if (console_blank_hook) diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c index cb19dbc52136..2bbeaaea46e9 100644 --- a/drivers/char/vt_ioctl.c +++ b/drivers/char/vt_ioctl.c @@ -133,7 +133,7 @@ static void vt_event_wait(struct vt_event_wait *vw) list_add(&vw->list, &vt_events); spin_unlock_irqrestore(&vt_event_lock, flags); /* Wait for it to pass */ - wait_event_interruptible(vt_event_waitqueue, vw->done); + wait_event_interruptible_tty(vt_event_waitqueue, vw->done); /* Dequeue it */ spin_lock_irqsave(&vt_event_lock, flags); list_del(&vw->list); @@ -509,7 +509,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, console = vc->vc_num; - lock_kernel(); + tty_lock(); if (!vc_cons_allocated(console)) { /* impossible? */ ret = -ENOIOCTLCMD; @@ -1336,7 +1336,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, ret = -ENOIOCTLCMD; } out: - unlock_kernel(); + tty_unlock(); return ret; eperm: ret = -EPERM; @@ -1369,7 +1369,7 @@ void vc_SAK(struct work_struct *work) acquire_console_sem(); vc = vc_con->d; if (vc) { - tty = vc->vc_tty; + tty = vc->port.tty; /* * SAK should also work in all raw modes and reset * them properly. @@ -1503,7 +1503,7 @@ long vt_compat_ioctl(struct tty_struct *tty, struct file * file, console = vc->vc_num; - lock_kernel(); + tty_lock(); if (!vc_cons_allocated(console)) { /* impossible? */ ret = -ENOIOCTLCMD; @@ -1571,11 +1571,11 @@ long vt_compat_ioctl(struct tty_struct *tty, struct file * file, goto fallback; } out: - unlock_kernel(); + tty_unlock(); return ret; fallback: - unlock_kernel(); + tty_unlock(); return vt_ioctl(tty, file, cmd, arg); } @@ -1761,10 +1761,13 @@ int vt_move_to_console(unsigned int vt, int alloc) return -EIO; } release_console_sem(); + tty_lock(); if (vt_waitactive(vt + 1)) { pr_debug("Suspend: Can't switch VCs."); + tty_unlock(); return -EINTR; } + tty_unlock(); return prev; } diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c index 54acd8b534df..a79525f434a8 100644 --- a/drivers/gpu/drm/i915/intel_fb.c +++ b/drivers/gpu/drm/i915/intel_fb.c @@ -130,7 +130,7 @@ static int intelfb_create(struct intel_fbdev *ifbdev, strcpy(info->fix.id, "inteldrmfb"); - info->flags = FBINFO_DEFAULT; + info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; info->fbops = &intelfb_ops; /* setup aperture base/size for vesafb takeover */ @@ -148,8 +148,6 @@ static int intelfb_create(struct intel_fbdev *ifbdev, info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset; info->fix.smem_len = size; - info->flags = FBINFO_DEFAULT; - info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset, size); if (!info->screen_base) { diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 2fb2444d2322..099f637264aa 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -250,6 +250,7 @@ nouveau_fbcon_create(struct nouveau_fbdev *nfbdev, info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_IMAGEBLIT; + info->flags |= FBINFO_CAN_FORCE_OUTPUT; info->fbops = &nouveau_fbcon_ops; info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset - dev_priv->vm_vram_base; diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c index dc1634bb0c11..dbf86962bdd1 100644 --- a/drivers/gpu/drm/radeon/radeon_fb.c +++ b/drivers/gpu/drm/radeon/radeon_fb.c @@ -224,7 +224,7 @@ static int radeonfb_create(struct radeon_fbdev *rfbdev, drm_fb_helper_fill_fix(info, fb->pitch, fb->depth); - info->flags = FBINFO_DEFAULT; + info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; info->fbops = &radeonfb_ops; tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start; diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c index 8681f1345056..d89aa38c5cf0 100644 --- a/drivers/serial/21285.c +++ b/drivers/serial/21285.c @@ -216,7 +216,7 @@ serial21285_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { unsigned long flags; - unsigned int baud, quot, h_lcr; + unsigned int baud, quot, h_lcr, b; /* * We don't support modem control lines. @@ -234,12 +234,8 @@ serial21285_set_termios(struct uart_port *port, struct ktermios *termios, */ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); quot = uart_get_divisor(port, baud); - - if (port->state && port->state->port.tty) { - struct tty_struct *tty = port->state->port.tty; - unsigned int b = port->uartclk / (16 * quot); - tty_encode_baud_rate(tty, b, b); - } + b = port->uartclk / (16 * quot); + tty_termios_encode_baud_rate(termios, b, b); switch (termios->c_cflag & CSIZE) { case CS5: diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c index 30463862603b..7356a56ac458 100644 --- a/drivers/serial/68328serial.c +++ b/drivers/serial/68328serial.c @@ -78,10 +78,6 @@ struct m68k_serial *m68k_consinfo = 0; #define M68K_CLOCK (16667000) /* FIXME: 16MHz is likely wrong */ -#ifdef CONFIG_CONSOLE -extern wait_queue_head_t keypress_wait; -#endif - struct tty_driver *serial_driver; /* number of characters left in xmit buffer before we ask for more */ @@ -102,19 +98,13 @@ static void change_speed(struct m68k_serial *info); * Setup for console. Argument comes from the boot command line. */ -#if defined(CONFIG_M68EZ328ADS) || defined(CONFIG_ALMA_ANS) || defined(CONFIG_DRAGONIXVZ) -#define CONSOLE_BAUD_RATE 115200 -#define DEFAULT_CBAUD B115200 -#else - /* (es) */ - /* note: this is messy, but it works, again, perhaps defined somewhere else?*/ - #ifdef CONFIG_M68VZ328 - #define CONSOLE_BAUD_RATE 19200 - #define DEFAULT_CBAUD B19200 - #endif - /* (/es) */ +/* note: this is messy, but it works, again, perhaps defined somewhere else?*/ +#ifdef CONFIG_M68VZ328 +#define CONSOLE_BAUD_RATE 19200 +#define DEFAULT_CBAUD B19200 #endif + #ifndef CONSOLE_BAUD_RATE #define CONSOLE_BAUD_RATE 9600 #define DEFAULT_CBAUD B9600 @@ -300,10 +290,6 @@ static void receive_chars(struct m68k_serial *info, unsigned short rx) return; #endif /* CONFIG_MAGIC_SYSRQ */ } - /* It is a 'keyboard interrupt' ;-) */ -#ifdef CONFIG_CONSOLE - wake_up(&keypress_wait); -#endif } if(!tty) @@ -1243,7 +1229,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, retval = -ERESTARTSYS; break; } + tty_unlock(); schedule(); + tty_lock(); } current->state = TASK_RUNNING; remove_wait_queue(&info->open_wait, &wait); diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c index 768612f8e41e..0dff3bbddc8b 100644 --- a/drivers/serial/68360serial.c +++ b/drivers/serial/68360serial.c @@ -1705,7 +1705,6 @@ static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout) printk("jiff=%lu...", jiffies); #endif - lock_kernel(); /* We go through the loop at least once because we can't tell * exactly when the last character exits the shifter. There can * be at least two characters waiting to be sent after the buffers @@ -1734,7 +1733,6 @@ static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout) bdp--; } while (bdp->status & BD_SC_READY); current->state = TASK_RUNNING; - unlock_kernel(); #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); #endif @@ -1862,7 +1860,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttys%d, count = %d\n", info->line, state->count); #endif + tty_unlock(); schedule(); + tty_lock(); } current->state = TASK_RUNNING; remove_wait_queue(&info->open_wait, &wait); diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 09ef57034c9c..24110f6f61e0 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -241,7 +241,7 @@ static const struct serial8250_config uart_config[] = { .fifo_size = 128, .tx_loadsz = 128, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO, + .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, }, [PORT_16654] = { .name = "ST16654", @@ -300,6 +300,13 @@ static const struct serial8250_config uart_config[] = { .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00, .flags = UART_CAP_FIFO | UART_CAP_AFE, }, + [PORT_U6_16550A] = { + .name = "U6_16550A", + .fifo_size = 64, + .tx_loadsz = 64, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .flags = UART_CAP_FIFO | UART_CAP_AFE, + }, }; #if defined(CONFIG_MIPS_ALCHEMY) @@ -1070,6 +1077,15 @@ static void autoconfig_16550a(struct uart_8250_port *up) DEBUG_AUTOCONF("Couldn't force IER_UUE to 0 "); } serial_outp(up, UART_IER, iersave); + + /* + * We distinguish between 16550A and U6 16550A by counting + * how many bytes are in the FIFO. + */ + if (up->port.type == PORT_16550A && size_fifo(up) == 64) { + up->port.type = PORT_U6_16550A; + up->capabilities |= UART_CAP_AFE; + } } /* @@ -2224,9 +2240,9 @@ static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int return quot; } -static void -serial8250_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) +void +serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) { struct uart_8250_port *up = (struct uart_8250_port *)port; unsigned char cval, fcr = 0; @@ -2402,16 +2418,22 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios, if (tty_termios_baud_rate(termios)) tty_termios_encode_baud_rate(termios, baud, baud); } +EXPORT_SYMBOL(serial8250_do_set_termios); static void -serial8250_set_ldisc(struct uart_port *port) +serial8250_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) { - int line = port->line; - - if (line >= port->state->port.tty->driver->num) - return; + if (port->set_termios) + port->set_termios(port, termios, old); + else + serial8250_do_set_termios(port, termios, old); +} - if (port->state->port.tty->ldisc->ops->num == N_PPS) { +static void +serial8250_set_ldisc(struct uart_port *port, int new) +{ + if (new == N_PPS) { port->flags |= UPF_HARDPPS_CD; serial8250_enable_ms(port); } else @@ -2987,6 +3009,7 @@ static int __devinit serial8250_probe(struct platform_device *dev) port.type = p->type; port.serial_in = p->serial_in; port.serial_out = p->serial_out; + port.set_termios = p->set_termios; port.dev = &dev->dev; port.irqflags |= irqflag; ret = serial8250_register_port(&port); @@ -3150,6 +3173,9 @@ int serial8250_register_port(struct uart_port *port) uart->port.serial_in = port->serial_in; if (port->serial_out) uart->port.serial_out = port->serial_out; + /* Possibly override set_termios call */ + if (port->set_termios) + uart->port.set_termios = port->set_termios; ret = uart_add_one_port(&serial8250_reg, &uart->port); if (ret == 0) diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c index f279745e9fef..b745792ec25a 100644 --- a/drivers/serial/8250_early.c +++ b/drivers/serial/8250_early.c @@ -19,9 +19,11 @@ * The user can specify the device directly, e.g., * earlycon=uart8250,io,0x3f8,9600n8 * earlycon=uart8250,mmio,0xff5e0000,115200n8 + * earlycon=uart8250,mmio32,0xff5e0000,115200n8 * or * console=uart8250,io,0x3f8,9600n8 * console=uart8250,mmio,0xff5e0000,115200n8 + * console=uart8250,mmio32,0xff5e0000,115200n8 */ #include <linux/tty.h> @@ -48,18 +50,31 @@ static struct early_serial8250_device early_device; static unsigned int __init serial_in(struct uart_port *port, int offset) { - if (port->iotype == UPIO_MEM) + switch (port->iotype) { + case UPIO_MEM: return readb(port->membase + offset); - else + case UPIO_MEM32: + return readl(port->membase + (offset << 2)); + case UPIO_PORT: return inb(port->iobase + offset); + default: + return 0; + } } static void __init serial_out(struct uart_port *port, int offset, int value) { - if (port->iotype == UPIO_MEM) + switch (port->iotype) { + case UPIO_MEM: writeb(value, port->membase + offset); - else + break; + case UPIO_MEM32: + writel(value, port->membase + (offset << 2)); + break; + case UPIO_PORT: outb(value, port->iobase + offset); + break; + } } #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) @@ -137,15 +152,21 @@ static int __init parse_options(struct early_serial8250_device *device, char *options) { struct uart_port *port = &device->port; - int mmio, length; + int mmio, mmio32, length; if (!options) return -ENODEV; port->uartclk = BASE_BAUD * 16; - if (!strncmp(options, "mmio,", 5)) { - port->iotype = UPIO_MEM; - port->mapbase = simple_strtoul(options + 5, &options, 0); + + mmio = !strncmp(options, "mmio,", 5); + mmio32 = !strncmp(options, "mmio32,", 7); + if (mmio || mmio32) { + port->iotype = (mmio ? UPIO_MEM : UPIO_MEM32); + port->mapbase = simple_strtoul(options + (mmio ? 5 : 7), + &options, 0); + if (mmio32) + port->regshift = 2; #ifdef CONFIG_FIX_EARLYCON_MEM set_fixmap_nocache(FIX_EARLYCON_MEM_BASE, port->mapbase & PAGE_MASK); @@ -157,11 +178,10 @@ static int __init parse_options(struct early_serial8250_device *device, if (!port->membase) { printk(KERN_ERR "%s: Couldn't ioremap 0x%llx\n", __func__, - (unsigned long long)port->mapbase); + (unsigned long long) port->mapbase); return -ENOMEM; } #endif - mmio = 1; } else if (!strncmp(options, "io,", 3)) { port->iotype = UPIO_PORT; port->iobase = simple_strtoul(options + 3, &options, 0); @@ -181,11 +201,18 @@ static int __init parse_options(struct early_serial8250_device *device, device->baud); } - printk(KERN_INFO "Early serial console at %s 0x%llx (options '%s')\n", - mmio ? "MMIO" : "I/O port", - mmio ? (unsigned long long) port->mapbase - : (unsigned long long) port->iobase, - device->options); + if (mmio || mmio32) + printk(KERN_INFO + "Early serial console at MMIO%s 0x%llu (options '%s')\n", + mmio32 ? "32" : "", + (unsigned long long)port->mapbase, + device->options); + else + printk(KERN_INFO + "Early serial console at I/O port 0x%lu (options '%s')\n", + port->iobase, + device->options); + return 0; } diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c index 746a44621d91..53be4d35a0aa 100644 --- a/drivers/serial/8250_pci.c +++ b/drivers/serial/8250_pci.c @@ -994,6 +994,7 @@ static int skip_tx_en_setup(struct serial_private *priv, #define PCI_DEVICE_ID_TITAN_800E 0xA014 #define PCI_DEVICE_ID_TITAN_200EI 0xA016 #define PCI_DEVICE_ID_TITAN_200EISI 0xA017 +#define PCI_DEVICE_ID_OXSEMI_16PCI958 0x9538 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 @@ -1542,6 +1543,8 @@ enum pci_board_num_t { pbn_b2_4_921600, pbn_b2_8_921600, + pbn_b2_8_1152000, + pbn_b2_bt_1_115200, pbn_b2_bt_2_115200, pbn_b2_bt_4_115200, @@ -1960,6 +1963,13 @@ static struct pciserial_board pci_boards[] __devinitdata = { .uart_offset = 8, }, + [pbn_b2_8_1152000] = { + .flags = FL_BASE2, + .num_ports = 8, + .base_baud = 1152000, + .uart_offset = 8, + }, + [pbn_b2_bt_1_115200] = { .flags = FL_BASE2|FL_BASE_BARS, .num_ports = 1, @@ -2875,6 +2885,9 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_bt_2_921600 }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI958, + PCI_ANY_ID , PCI_ANY_ID, 0, 0, + pbn_b2_8_1152000 }, /* * Oxford Semiconductor Inc. Tornado PCI express device range. diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index e437ce8c1748..a22e60c06f48 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -542,6 +542,7 @@ config SERIAL_S5PV210 help Serial port support for Samsung's S5P Family of SoC's + config SERIAL_MAX3100 tristate "MAX3100 support" depends on SPI @@ -549,6 +550,22 @@ config SERIAL_MAX3100 help MAX3100 chip support +config SERIAL_MAX3107 + tristate "MAX3107 support" + depends on SPI + select SERIAL_CORE + help + MAX3107 chip support + +config SERIAL_MAX3107_AAVA + tristate "MAX3107 AAVA platform support" + depends on X86_MRST && SERIAL_MAX3107 && GPIOLIB + select SERIAL_CORE + help + Support for the MAX3107 chip configuration found on the AAVA + platform. Includes the extra initialisation and GPIO support + neded for this device. + config SERIAL_DZ bool "DECstation DZ serial driver" depends on MACH_DECSTATION && 32BIT @@ -690,6 +707,33 @@ config SERIAL_SA1100_CONSOLE your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) +config SERIAL_MRST_MAX3110 + tristate "SPI UART driver for Max3110" + depends on SPI_DW_PCI + select SERIAL_CORE + select SERIAL_CORE_CONSOLE + help + This is the UART protocol driver for the MAX3110 device on + the Intel Moorestown platform. On other systems use the max3100 + driver. + +config MRST_MAX3110_IRQ + boolean "Enable GPIO IRQ for Max3110 over Moorestown" + default n + depends on SERIAL_MRST_MAX3110 && GPIO_LANGWELL + help + This has to be enabled after Moorestown GPIO driver is loaded + +config SERIAL_MFD_HSU + tristate "Medfield High Speed UART support" + depends on PCI + select SERIAL_CORE + +config SERIAL_MFD_HSU_CONSOLE + boolean "Medfile HSU serial console support" + depends on SERIAL_MFD_HSU=y + select SERIAL_CORE_CONSOLE + config SERIAL_BFIN tristate "Blackfin serial port support" depends on BLACKFIN diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 208a85572c32..1ca4fd599ffe 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -46,6 +46,8 @@ obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o obj-$(CONFIG_SERIAL_S5PV210) += s5pv210.o obj-$(CONFIG_SERIAL_MAX3100) += max3100.o +obj-$(CONFIG_SERIAL_MAX3107) += max3107.o +obj-$(CONFIG_SERIAL_MAX3107_AAVA) += max3107-aava.o obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o obj-$(CONFIG_SERIAL_MUX) += mux.o obj-$(CONFIG_SERIAL_68328) += 68328serial.o @@ -84,3 +86,5 @@ obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o +obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o +obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c index 0f1189605d21..f8d8a00554da 100644 --- a/drivers/serial/altera_uart.c +++ b/drivers/serial/altera_uart.c @@ -394,7 +394,7 @@ int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp) static void altera_uart_console_putc(struct uart_port *port, const char c) { while (!(readl(port->membase + ALTERA_UART_STATUS_REG) & - ALTERA_UART_STATUS_TRDY_MSK)) + ALTERA_UART_STATUS_TRDY_MSK)) cpu_relax(); writel(c, port->membase + ALTERA_UART_TXDATA_REG); diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index a182def7007d..3892666b5fbd 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -217,7 +217,8 @@ void atmel_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf) if (rs485conf->flags & SER_RS485_ENABLED) { dev_dbg(port->dev, "Setting UART to RS485\n"); atmel_port->tx_done_mask = ATMEL_US_TXEMPTY; - UART_PUT_TTGR(port, rs485conf->delay_rts_before_send); + if (rs485conf->flags & SER_RS485_RTS_AFTER_SEND) + UART_PUT_TTGR(port, rs485conf->delay_rts_after_send); mode |= ATMEL_US_USMODE_RS485; } else { dev_dbg(port->dev, "Setting UART to RS232\n"); @@ -292,7 +293,9 @@ static void atmel_set_mctrl(struct uart_port *port, u_int mctrl) if (atmel_port->rs485.flags & SER_RS485_ENABLED) { dev_dbg(port->dev, "Setting UART to RS485\n"); - UART_PUT_TTGR(port, atmel_port->rs485.delay_rts_before_send); + if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND) + UART_PUT_TTGR(port, + atmel_port->rs485.delay_rts_after_send); mode |= ATMEL_US_USMODE_RS485; } else { dev_dbg(port->dev, "Setting UART to RS232\n"); @@ -1211,7 +1214,9 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, if (atmel_port->rs485.flags & SER_RS485_ENABLED) { dev_dbg(port->dev, "Setting UART to RS485\n"); - UART_PUT_TTGR(port, atmel_port->rs485.delay_rts_before_send); + if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND) + UART_PUT_TTGR(port, + atmel_port->rs485.delay_rts_after_send); mode |= ATMEL_US_USMODE_RS485; } else { dev_dbg(port->dev, "Setting UART to RS232\n"); diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index 511cbf687877..a9eff2b18eab 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -957,15 +957,12 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser) * Enable the IrDA function if tty->ldisc.num is N_IRDA. * In other cases, disable IrDA function. */ -static void bfin_serial_set_ldisc(struct uart_port *port) +static void bfin_serial_set_ldisc(struct uart_port *port, int ld) { int line = port->line; unsigned short val; - if (line >= port->state->port.tty->driver->num) - return; - - switch (port->state->port.tty->termios->c_line) { + switch (ld) { case N_IRDA: val = UART_GET_GCTL(&bfin_serial_ports[line]); val |= (IREN | RPOLC); diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c index 30626440a062..c856905bb3bd 100644 --- a/drivers/serial/crisv10.c +++ b/drivers/serial/crisv10.c @@ -3935,7 +3935,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) * Check R_DMA_CHx_STATUS bit 0-6=number of available bytes in FIFO * R_DMA_CHx_HWSW bit 31-16=nbr of bytes left in DMA buffer (0=64k) */ - lock_kernel(); orig_jiffies = jiffies; while (info->xmit.head != info->xmit.tail || /* More in send queue */ (*info->ostatusadr & 0x007f) || /* more in FIFO */ @@ -3952,7 +3951,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) curr_time_usec - info->last_tx_active_usec; } set_current_state(TASK_RUNNING); - unlock_kernel(); } /* @@ -3992,7 +3990,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible(info->close_wait, + wait_event_interruptible_tty(info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART if (info->flags & ASYNC_HUP_NOTIFY) @@ -4068,7 +4066,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttyS%d, count = %d\n", info->line, info->count); #endif + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); @@ -4150,7 +4150,7 @@ rs_open(struct tty_struct *tty, struct file * filp) */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible(info->close_wait, + wait_event_interruptible_tty(info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART return ((info->flags & ASYNC_HUP_NOTIFY) ? @@ -4533,8 +4533,8 @@ static int __init rs_init(void) INIT_WORK(&info->work, do_softint); if (info->enabled) { - printk(KERN_INFO "%s%d at 0x%x is a builtin UART with DMA\n", - serial_driver->name, info->line, (unsigned int)info->ioport); + printk(KERN_INFO "%s%d at %p is a builtin UART with DMA\n", + serial_driver->name, info->line, info->ioport); } } #ifdef CONFIG_ETRAX_FAST_TIMER diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index eacb588a9345..66ecc7ab6dab 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -909,13 +909,11 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, rational_best_approximation(16 * div * baud, sport->port.uartclk, 1 << 16, 1 << 16, &num, &denom); - if (port->state && port->state->port.tty) { - tdiv64 = sport->port.uartclk; - tdiv64 *= num; - do_div(tdiv64, denom * 16 * div); - tty_encode_baud_rate(sport->port.state->port.tty, + tdiv64 = sport->port.uartclk; + tdiv64 *= num; + do_div(tdiv64, denom * 16 * div); + tty_termios_encode_baud_rate(termios, (speed_t)tdiv64, (speed_t)tdiv64); - } num -= 1; denom -= 1; diff --git a/drivers/serial/ioc3_serial.c b/drivers/serial/ioc3_serial.c index f164ba4eba02..93de907b1208 100644 --- a/drivers/serial/ioc3_serial.c +++ b/drivers/serial/ioc3_serial.c @@ -954,12 +954,13 @@ ioc3_change_speed(struct uart_port *the_port, struct ktermios *new_termios, struct ktermios *old_termios) { struct ioc3_port *port = get_ioc3_port(the_port); - unsigned int cflag; + unsigned int cflag, iflag; int baud; int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8; struct uart_state *state = the_port->state; cflag = new_termios->c_cflag; + iflag = new_termios->c_iflag; switch (cflag & CSIZE) { case CS5: @@ -1000,12 +1001,12 @@ ioc3_change_speed(struct uart_port *the_port, state->port.tty->low_latency = 1; - if (I_IGNPAR(state->port.tty)) + if (iflag & IGNPAR) the_port->ignore_status_mask &= ~(N_PARITY_ERROR | N_FRAMING_ERROR); - if (I_IGNBRK(state->port.tty)) { + if (iflag & IGNBRK) { the_port->ignore_status_mask &= ~N_BREAK; - if (I_IGNPAR(state->port.tty)) + if (iflag & IGNPAR) the_port->ignore_status_mask &= ~N_OVERRUN_ERROR; } if (!(cflag & CREAD)) { diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c index 8ad28fc64926..fcfe82653ac8 100644 --- a/drivers/serial/ioc4_serial.c +++ b/drivers/serial/ioc4_serial.c @@ -1685,11 +1685,12 @@ ioc4_change_speed(struct uart_port *the_port, { struct ioc4_port *port = get_ioc4_port(the_port, 0); int baud, bits; - unsigned cflag; + unsigned cflag, iflag; int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8; struct uart_state *state = the_port->state; cflag = new_termios->c_cflag; + iflag = new_termios->c_iflag; switch (cflag & CSIZE) { case CS5: @@ -1741,12 +1742,12 @@ ioc4_change_speed(struct uart_port *the_port, state->port.tty->low_latency = 1; - if (I_IGNPAR(state->port.tty)) + if (iflag & IGNPAR) the_port->ignore_status_mask &= ~(N_PARITY_ERROR | N_FRAMING_ERROR); - if (I_IGNBRK(state->port.tty)) { + if (iflag & IGNBRK) { the_port->ignore_status_mask &= ~N_BREAK; - if (I_IGNPAR(state->port.tty)) + if (iflag & IGNPAR) the_port->ignore_status_mask &= ~N_OVERRUN_ERROR; } if (!(cflag & CREAD)) { diff --git a/drivers/serial/max3100.c b/drivers/serial/max3100.c index 3351c3bd59e4..beb1afa27d8d 100644 --- a/drivers/serial/max3100.c +++ b/drivers/serial/max3100.c @@ -430,17 +430,14 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios, int baud = 0; unsigned cflag; u32 param_new, param_mask, parity = 0; - struct tty_struct *tty = s->port.state->port.tty; dev_dbg(&s->spi->dev, "%s\n", __func__); - if (!tty) - return; cflag = termios->c_cflag; param_new = 0; param_mask = 0; - baud = tty_get_baud_rate(tty); + baud = tty_termios_baud_rate(termios); param_new = s->conf & MAX3100_BAUD; switch (baud) { case 300: @@ -485,7 +482,7 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios, default: baud = s->baud; } - tty_encode_baud_rate(tty, baud, baud); + tty_termios_encode_baud_rate(termios, baud, baud); s->baud = baud; param_mask |= MAX3100_BAUD; diff --git a/drivers/serial/max3107-aava.c b/drivers/serial/max3107-aava.c new file mode 100644 index 000000000000..a1fe304f2f52 --- /dev/null +++ b/drivers/serial/max3107-aava.c @@ -0,0 +1,344 @@ +/* + * max3107.c - spi uart protocol driver for Maxim 3107 + * Based on max3100.c + * by Christian Pellegrin <chripell@evolware.org> + * and max3110.c + * by Feng Tang <feng.tang@intel.com> + * + * Copyright (C) Aavamobile 2009 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/serial_core.h> +#include <linux/serial.h> +#include <linux/spi/spi.h> +#include <linux/freezer.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/sfi.h> +#include <asm/mrst.h> +#include "max3107.h" + +/* GPIO direction to input function */ +static int max3107_gpio_direction_in(struct gpio_chip *chip, unsigned offset) +{ + struct max3107_port *s = container_of(chip, struct max3107_port, chip); + u16 buf[1]; /* Buffer for SPI transfer */ + + if (offset >= MAX3107_GPIO_COUNT) { + dev_err(&s->spi->dev, "Invalid GPIO\n"); + return -EINVAL; + } + + /* Read current GPIO configuration register */ + buf[0] = MAX3107_GPIOCFG_REG; + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { + dev_err(&s->spi->dev, "SPI transfer GPIO read failed\n"); + return -EIO; + } + buf[0] &= MAX3107_SPI_RX_DATA_MASK; + + /* Set GPIO to input */ + buf[0] &= ~(0x0001 << offset); + + /* Write new GPIO configuration register value */ + buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIOCFG_REG); + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, 2)) { + dev_err(&s->spi->dev, "SPI transfer GPIO write failed\n"); + return -EIO; + } + return 0; +} + +/* GPIO direction to output function */ +static int max3107_gpio_direction_out(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct max3107_port *s = container_of(chip, struct max3107_port, chip); + u16 buf[2]; /* Buffer for SPI transfers */ + + if (offset >= MAX3107_GPIO_COUNT) { + dev_err(&s->spi->dev, "Invalid GPIO\n"); + return -EINVAL; + } + + /* Read current GPIO configuration and data registers */ + buf[0] = MAX3107_GPIOCFG_REG; + buf[1] = MAX3107_GPIODATA_REG; + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 4)) { + dev_err(&s->spi->dev, "SPI transfer gpio failed\n"); + return -EIO; + } + buf[0] &= MAX3107_SPI_RX_DATA_MASK; + buf[1] &= MAX3107_SPI_RX_DATA_MASK; + + /* Set GPIO to output */ + buf[0] |= (0x0001 << offset); + /* Set value */ + if (value) + buf[1] |= (0x0001 << offset); + else + buf[1] &= ~(0x0001 << offset); + + /* Write new GPIO configuration and data register values */ + buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIOCFG_REG); + buf[1] |= (MAX3107_WRITE_BIT | MAX3107_GPIODATA_REG); + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, 4)) { + dev_err(&s->spi->dev, + "SPI transfer for GPIO conf data w failed\n"); + return -EIO; + } + return 0; +} + +/* GPIO value query function */ +static int max3107_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct max3107_port *s = container_of(chip, struct max3107_port, chip); + u16 buf[1]; /* Buffer for SPI transfer */ + + if (offset >= MAX3107_GPIO_COUNT) { + dev_err(&s->spi->dev, "Invalid GPIO\n"); + return -EINVAL; + } + + /* Read current GPIO data register */ + buf[0] = MAX3107_GPIODATA_REG; + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { + dev_err(&s->spi->dev, "SPI transfer GPIO data r failed\n"); + return -EIO; + } + buf[0] &= MAX3107_SPI_RX_DATA_MASK; + + /* Return value */ + return buf[0] & (0x0001 << offset); +} + +/* GPIO value set function */ +static void max3107_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct max3107_port *s = container_of(chip, struct max3107_port, chip); + u16 buf[2]; /* Buffer for SPI transfers */ + + if (offset >= MAX3107_GPIO_COUNT) { + dev_err(&s->spi->dev, "Invalid GPIO\n"); + return; + } + + /* Read current GPIO configuration registers*/ + buf[0] = MAX3107_GPIODATA_REG; + buf[1] = MAX3107_GPIOCFG_REG; + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 4)) { + dev_err(&s->spi->dev, + "SPI transfer for GPIO data and config read failed\n"); + return; + } + buf[0] &= MAX3107_SPI_RX_DATA_MASK; + buf[1] &= MAX3107_SPI_RX_DATA_MASK; + + if (!(buf[1] & (0x0001 << offset))) { + /* Configured as input, can't set value */ + dev_warn(&s->spi->dev, + "Trying to set value for input GPIO\n"); + return; + } + + /* Set value */ + if (value) + buf[0] |= (0x0001 << offset); + else + buf[0] &= ~(0x0001 << offset); + + /* Write new GPIO data register value */ + buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIODATA_REG); + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, 2)) + dev_err(&s->spi->dev, "SPI transfer GPIO data w failed\n"); +} + +/* GPIO chip data */ +static struct gpio_chip max3107_gpio_chip = { + .owner = THIS_MODULE, + .direction_input = max3107_gpio_direction_in, + .direction_output = max3107_gpio_direction_out, + .get = max3107_gpio_get, + .set = max3107_gpio_set, + .can_sleep = 1, + .base = MAX3107_GPIO_BASE, + .ngpio = MAX3107_GPIO_COUNT, +}; + +/** + * max3107_aava_reset - reset on AAVA systems + * @spi: The SPI device we are probing + * + * Reset the device ready for probing. + */ + +static int max3107_aava_reset(struct spi_device *spi) +{ + /* Reset the chip */ + if (gpio_request(MAX3107_RESET_GPIO, "max3107")) { + pr_err("Requesting RESET GPIO failed\n"); + return -EIO; + } + if (gpio_direction_output(MAX3107_RESET_GPIO, 0)) { + pr_err("Setting RESET GPIO to 0 failed\n"); + gpio_free(MAX3107_RESET_GPIO); + return -EIO; + } + msleep(MAX3107_RESET_DELAY); + if (gpio_direction_output(MAX3107_RESET_GPIO, 1)) { + pr_err("Setting RESET GPIO to 1 failed\n"); + gpio_free(MAX3107_RESET_GPIO); + return -EIO; + } + gpio_free(MAX3107_RESET_GPIO); + msleep(MAX3107_WAKEUP_DELAY); + return 0; +} + +static int max3107_aava_configure(struct max3107_port *s) +{ + int retval; + + /* Initialize GPIO chip data */ + s->chip = max3107_gpio_chip; + s->chip.label = s->spi->modalias; + s->chip.dev = &s->spi->dev; + + /* Add GPIO chip */ + retval = gpiochip_add(&s->chip); + if (retval) { + dev_err(&s->spi->dev, "Adding GPIO chip failed\n"); + return retval; + } + + /* Temporary fix for EV2 boot problems, set modem reset to 0 */ + max3107_gpio_direction_out(&s->chip, 3, 0); + return 0; +} + +#if 0 +/* This will get enabled once we have the board stuff merged for this + specific case */ + +static const struct baud_table brg13_ext[] = { + { 300, MAX3107_BRG13_B300 }, + { 600, MAX3107_BRG13_B600 }, + { 1200, MAX3107_BRG13_B1200 }, + { 2400, MAX3107_BRG13_B2400 }, + { 4800, MAX3107_BRG13_B4800 }, + { 9600, MAX3107_BRG13_B9600 }, + { 19200, MAX3107_BRG13_B19200 }, + { 57600, MAX3107_BRG13_B57600 }, + { 115200, MAX3107_BRG13_B115200 }, + { 230400, MAX3107_BRG13_B230400 }, + { 460800, MAX3107_BRG13_B460800 }, + { 921600, MAX3107_BRG13_B921600 }, + { 0, 0 } +}; + +static void max3107_aava_init(struct max3107_port *s) +{ + /*override for AAVA SC specific*/ + if (mrst_platform_id() == MRST_PLATFORM_AAVA_SC) { + if (get_koski_build_id() <= KOSKI_EV2) + if (s->ext_clk) { + s->brg_cfg = MAX3107_BRG13_B9600; + s->baud_tbl = (struct baud_table *)brg13_ext; + } + } +} +#endif + +static int __devexit max3107_aava_remove(struct spi_device *spi) +{ + struct max3107_port *s = dev_get_drvdata(&spi->dev); + + /* Remove GPIO chip */ + if (gpiochip_remove(&s->chip)) + dev_warn(&spi->dev, "Removing GPIO chip failed\n"); + + /* Then do the default remove */ + return max3107_remove(spi); +} + +/* Platform data */ +static struct max3107_plat aava_plat_data = { + .loopback = 0, + .ext_clk = 1, +/* .init = max3107_aava_init, */ + .configure = max3107_aava_configure, + .hw_suspend = max3107_hw_susp, + .polled_mode = 0, + .poll_time = 0, +}; + + +static int __devinit max3107_probe_aava(struct spi_device *spi) +{ + int err = max3107_aava_reset(spi); + if (err < 0) + return err; + return max3107_probe(spi, &aava_plat_data); +} + +/* Spi driver data */ +static struct spi_driver max3107_driver = { + .driver = { + .name = "aava-max3107", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = max3107_probe_aava, + .remove = __devexit_p(max3107_aava_remove), + .suspend = max3107_suspend, + .resume = max3107_resume, +}; + +/* Driver init function */ +static int __init max3107_init(void) +{ + return spi_register_driver(&max3107_driver); +} + +/* Driver exit function */ +static void __exit max3107_exit(void) +{ + spi_unregister_driver(&max3107_driver); +} + +module_init(max3107_init); +module_exit(max3107_exit); + +MODULE_DESCRIPTION("MAX3107 driver"); +MODULE_AUTHOR("Aavamobile"); +MODULE_ALIAS("aava-max3107-spi"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/max3107.c b/drivers/serial/max3107.c new file mode 100644 index 000000000000..67283c1a57ff --- /dev/null +++ b/drivers/serial/max3107.c @@ -0,0 +1,1197 @@ +/* + * max3107.c - spi uart protocol driver for Maxim 3107 + * Based on max3100.c + * by Christian Pellegrin <chripell@evolware.org> + * and max3110.c + * by Feng Tang <feng.tang@intel.com> + * + * Copyright (C) Aavamobile 2009 + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/serial_core.h> +#include <linux/serial.h> +#include <linux/gpio.h> +#include <linux/spi/spi.h> +#include <linux/freezer.h> +#include "max3107.h" + +static const struct baud_table brg26_ext[] = { + { 300, MAX3107_BRG26_B300 }, + { 600, MAX3107_BRG26_B600 }, + { 1200, MAX3107_BRG26_B1200 }, + { 2400, MAX3107_BRG26_B2400 }, + { 4800, MAX3107_BRG26_B4800 }, + { 9600, MAX3107_BRG26_B9600 }, + { 19200, MAX3107_BRG26_B19200 }, + { 57600, MAX3107_BRG26_B57600 }, + { 115200, MAX3107_BRG26_B115200 }, + { 230400, MAX3107_BRG26_B230400 }, + { 460800, MAX3107_BRG26_B460800 }, + { 921600, MAX3107_BRG26_B921600 }, + { 0, 0 } +}; + +static const struct baud_table brg13_int[] = { + { 300, MAX3107_BRG13_IB300 }, + { 600, MAX3107_BRG13_IB600 }, + { 1200, MAX3107_BRG13_IB1200 }, + { 2400, MAX3107_BRG13_IB2400 }, + { 4800, MAX3107_BRG13_IB4800 }, + { 9600, MAX3107_BRG13_IB9600 }, + { 19200, MAX3107_BRG13_IB19200 }, + { 57600, MAX3107_BRG13_IB57600 }, + { 115200, MAX3107_BRG13_IB115200 }, + { 230400, MAX3107_BRG13_IB230400 }, + { 460800, MAX3107_BRG13_IB460800 }, + { 921600, MAX3107_BRG13_IB921600 }, + { 0, 0 } +}; + +static u32 get_new_brg(int baud, struct max3107_port *s) +{ + int i; + const struct baud_table *baud_tbl = s->baud_tbl; + + for (i = 0; i < 13; i++) { + if (baud == baud_tbl[i].baud) + return baud_tbl[i].new_brg; + } + + return 0; +} + +/* Perform SPI transfer for write/read of device register(s) */ +int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len) +{ + struct spi_message spi_msg; + struct spi_transfer spi_xfer; + + /* Initialize SPI ,message */ + spi_message_init(&spi_msg); + + /* Initialize SPI transfer */ + memset(&spi_xfer, 0, sizeof spi_xfer); + spi_xfer.len = len; + spi_xfer.tx_buf = tx; + spi_xfer.rx_buf = rx; + spi_xfer.speed_hz = MAX3107_SPI_SPEED; + + /* Add SPI transfer to SPI message */ + spi_message_add_tail(&spi_xfer, &spi_msg); + +#ifdef DBG_TRACE_SPI_DATA + { + int i; + pr_info("tx len %d:\n", spi_xfer.len); + for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) + pr_info(" %x", ((u8 *)spi_xfer.tx_buf)[i]); + pr_info("\n"); + } +#endif + + /* Perform synchronous SPI transfer */ + if (spi_sync(s->spi, &spi_msg)) { + dev_err(&s->spi->dev, "spi_sync failure\n"); + return -EIO; + } + +#ifdef DBG_TRACE_SPI_DATA + if (spi_xfer.rx_buf) { + int i; + pr_info("rx len %d:\n", spi_xfer.len); + for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) + pr_info(" %x", ((u8 *)spi_xfer.rx_buf)[i]); + pr_info("\n"); + } +#endif + return 0; +} +EXPORT_SYMBOL_GPL(max3107_rw); + +/* Puts received data to circular buffer */ +static void put_data_to_circ_buf(struct max3107_port *s, unsigned char *data, + int len) +{ + struct uart_port *port = &s->port; + struct tty_struct *tty; + + if (!port->state) + return; + + tty = port->state->port.tty; + if (!tty) + return; + + /* Insert received data */ + tty_insert_flip_string(tty, data, len); + /* Update RX counter */ + port->icount.rx += len; +} + +/* Handle data receiving */ +static void max3107_handlerx(struct max3107_port *s, u16 rxlvl) +{ + int i; + int j; + int len; /* SPI transfer buffer length */ + u16 *buf; + u8 *valid_str; + + if (!s->rx_enabled) + /* RX is disabled */ + return; + + if (rxlvl == 0) { + /* RX fifo is empty */ + return; + } else if (rxlvl >= MAX3107_RX_FIFO_SIZE) { + dev_warn(&s->spi->dev, "Possible RX FIFO overrun %d\n", rxlvl); + /* Ensure sanity of RX level */ + rxlvl = MAX3107_RX_FIFO_SIZE; + } + if ((s->rxbuf == 0) || (s->rxstr == 0)) { + dev_warn(&s->spi->dev, "Rx buffer/str isn't ready\n"); + return; + } + buf = s->rxbuf; + valid_str = s->rxstr; + while (rxlvl) { + pr_debug("rxlvl %d\n", rxlvl); + /* Clear buffer */ + memset(buf, 0, sizeof(u16) * (MAX3107_RX_FIFO_SIZE + 2)); + len = 0; + if (s->irqen_reg & MAX3107_IRQ_RXFIFO_BIT) { + /* First disable RX FIFO interrupt */ + pr_debug("Disabling RX INT\n"); + buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); + s->irqen_reg &= ~MAX3107_IRQ_RXFIFO_BIT; + buf[0] |= s->irqen_reg; + len++; + } + /* Just increase the length by amount of words in FIFO since + * buffer was zeroed and SPI transfer of 0x0000 means reading + * from RX FIFO + */ + len += rxlvl; + /* Append RX level query */ + buf[len] = MAX3107_RXFIFOLVL_REG; + len++; + + /* Perform the SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, len * 2)) { + dev_err(&s->spi->dev, "SPI transfer for RX h failed\n"); + return; + } + + /* Skip RX FIFO interrupt disabling word if it was added */ + j = ((len - 1) - rxlvl); + /* Read received words */ + for (i = 0; i < rxlvl; i++, j++) + valid_str[i] = (u8)buf[j]; + put_data_to_circ_buf(s, valid_str, rxlvl); + /* Get new RX level */ + rxlvl = (buf[len - 1] & MAX3107_SPI_RX_DATA_MASK); + } + + if (s->rx_enabled) { + /* RX still enabled, re-enable RX FIFO interrupt */ + pr_debug("Enabling RX INT\n"); + buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); + s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; + buf[0] |= s->irqen_reg; + if (max3107_rw(s, (u8 *)buf, NULL, 2)) + dev_err(&s->spi->dev, "RX FIFO INT enabling failed\n"); + } + + /* Push the received data to receivers */ + if (s->port.state->port.tty) + tty_flip_buffer_push(s->port.state->port.tty); +} + + +/* Handle data sending */ +static void max3107_handletx(struct max3107_port *s) +{ + struct circ_buf *xmit = &s->port.state->xmit; + int i; + unsigned long flags; + int len; /* SPI transfer buffer length */ + u16 *buf; + + if (!s->tx_fifo_empty) + /* Don't send more data before previous data is sent */ + return; + + if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port)) + /* No data to send or TX is stopped */ + return; + + if (!s->txbuf) { + dev_warn(&s->spi->dev, "Txbuf isn't ready\n"); + return; + } + buf = s->txbuf; + /* Get length of data pending in circular buffer */ + len = uart_circ_chars_pending(xmit); + if (len) { + /* Limit to size of TX FIFO */ + if (len > MAX3107_TX_FIFO_SIZE) + len = MAX3107_TX_FIFO_SIZE; + + pr_debug("txlen %d\n", len); + + /* Update TX counter */ + s->port.icount.tx += len; + + /* TX FIFO will no longer be empty */ + s->tx_fifo_empty = 0; + + i = 0; + if (s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT) { + /* First disable TX empty interrupt */ + pr_debug("Disabling TE INT\n"); + buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); + s->irqen_reg &= ~MAX3107_IRQ_TXEMPTY_BIT; + buf[i] |= s->irqen_reg; + i++; + len++; + } + /* Add data to send */ + spin_lock_irqsave(&s->port.lock, flags); + for ( ; i < len ; i++) { + buf[i] = (MAX3107_WRITE_BIT | MAX3107_THR_REG); + buf[i] |= ((u16)xmit->buf[xmit->tail] & + MAX3107_SPI_TX_DATA_MASK); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + } + spin_unlock_irqrestore(&s->port.lock, flags); + if (!(s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT)) { + /* Enable TX empty interrupt */ + pr_debug("Enabling TE INT\n"); + buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); + s->irqen_reg |= MAX3107_IRQ_TXEMPTY_BIT; + buf[i] |= s->irqen_reg; + i++; + len++; + } + if (!s->tx_enabled) { + /* Enable TX */ + pr_debug("Enable TX\n"); + buf[i] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); + spin_lock_irqsave(&s->data_lock, flags); + s->mode1_reg &= ~MAX3107_MODE1_TXDIS_BIT; + buf[i] |= s->mode1_reg; + spin_unlock_irqrestore(&s->data_lock, flags); + s->tx_enabled = 1; + i++; + len++; + } + + /* Perform the SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, len*2)) { + dev_err(&s->spi->dev, + "SPI transfer TX handling failed\n"); + return; + } + } + + /* Indicate wake up if circular buffer is getting low on data */ + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&s->port); + +} + +/* Handle interrupts + * Also reads and returns current RX FIFO level + */ +static u16 handle_interrupt(struct max3107_port *s) +{ + u16 buf[4]; /* Buffer for SPI transfers */ + u8 irq_status; + u16 rx_level; + unsigned long flags; + + /* Read IRQ status register */ + buf[0] = MAX3107_IRQSTS_REG; + /* Read status IRQ status register */ + buf[1] = MAX3107_STS_IRQSTS_REG; + /* Read LSR IRQ status register */ + buf[2] = MAX3107_LSR_IRQSTS_REG; + /* Query RX level */ + buf[3] = MAX3107_RXFIFOLVL_REG; + + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 8)) { + dev_err(&s->spi->dev, + "SPI transfer for INTR handling failed\n"); + return 0; + } + + irq_status = (u8)buf[0]; + pr_debug("IRQSTS %x\n", irq_status); + rx_level = (buf[3] & MAX3107_SPI_RX_DATA_MASK); + + if (irq_status & MAX3107_IRQ_LSR_BIT) { + /* LSR interrupt */ + if (buf[2] & MAX3107_LSR_RXTO_BIT) + /* RX timeout interrupt, + * handled by normal RX handling + */ + pr_debug("RX TO INT\n"); + } + + if (irq_status & MAX3107_IRQ_TXEMPTY_BIT) { + /* Tx empty interrupt, + * disable TX and set tx_fifo_empty flag + */ + pr_debug("TE INT, disabling TX\n"); + buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); + spin_lock_irqsave(&s->data_lock, flags); + s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; + buf[0] |= s->mode1_reg; + spin_unlock_irqrestore(&s->data_lock, flags); + if (max3107_rw(s, (u8 *)buf, NULL, 2)) + dev_err(&s->spi->dev, "SPI transfer TX dis failed\n"); + s->tx_enabled = 0; + s->tx_fifo_empty = 1; + } + + if (irq_status & MAX3107_IRQ_RXFIFO_BIT) + /* RX FIFO interrupt, + * handled by normal RX handling + */ + pr_debug("RFIFO INT\n"); + + /* Return RX level */ + return rx_level; +} + +/* Trigger work thread*/ +static void max3107_dowork(struct max3107_port *s) +{ + if (!work_pending(&s->work) && !freezing(current) && !s->suspended) + queue_work(s->workqueue, &s->work); + else + dev_warn(&s->spi->dev, "interrup isn't serviced normally!\n"); +} + +/* Work thread */ +static void max3107_work(struct work_struct *w) +{ + struct max3107_port *s = container_of(w, struct max3107_port, work); + u16 rxlvl = 0; + int len; /* SPI transfer buffer length */ + u16 buf[5]; /* Buffer for SPI transfers */ + unsigned long flags; + + /* Start by reading current RX FIFO level */ + buf[0] = MAX3107_RXFIFOLVL_REG; + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { + dev_err(&s->spi->dev, "SPI transfer RX lev failed\n"); + rxlvl = 0; + } else { + rxlvl = (buf[0] & MAX3107_SPI_RX_DATA_MASK); + } + + do { + pr_debug("rxlvl %d\n", rxlvl); + + /* Handle RX */ + max3107_handlerx(s, rxlvl); + rxlvl = 0; + + if (s->handle_irq) { + /* Handle pending interrupts + * We also get new RX FIFO level since new data may + * have been received while pushing received data to + * receivers + */ + s->handle_irq = 0; + rxlvl = handle_interrupt(s); + } + + /* Handle TX */ + max3107_handletx(s); + + /* Handle configuration changes */ + len = 0; + spin_lock_irqsave(&s->data_lock, flags); + if (s->mode1_commit) { + pr_debug("mode1_commit\n"); + buf[len] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); + buf[len++] |= s->mode1_reg; + s->mode1_commit = 0; + } + if (s->lcr_commit) { + pr_debug("lcr_commit\n"); + buf[len] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG); + buf[len++] |= s->lcr_reg; + s->lcr_commit = 0; + } + if (s->brg_commit) { + pr_debug("brg_commit\n"); + buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG); + buf[len++] |= ((s->brg_cfg >> 16) & + MAX3107_SPI_TX_DATA_MASK); + buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG); + buf[len++] |= ((s->brg_cfg >> 8) & + MAX3107_SPI_TX_DATA_MASK); + buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG); + buf[len++] |= ((s->brg_cfg) & 0xff); + s->brg_commit = 0; + } + spin_unlock_irqrestore(&s->data_lock, flags); + + if (len > 0) { + if (max3107_rw(s, (u8 *)buf, NULL, len * 2)) + dev_err(&s->spi->dev, + "SPI transfer config failed\n"); + } + + /* Reloop if interrupt handling indicated data in RX FIFO */ + } while (rxlvl); + +} + +/* Set sleep mode */ +static void max3107_set_sleep(struct max3107_port *s, int mode) +{ + u16 buf[1]; /* Buffer for SPI transfer */ + unsigned long flags; + pr_debug("enter, mode %d\n", mode); + + buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); + spin_lock_irqsave(&s->data_lock, flags); + switch (mode) { + case MAX3107_DISABLE_FORCED_SLEEP: + s->mode1_reg &= ~MAX3107_MODE1_FORCESLEEP_BIT; + break; + case MAX3107_ENABLE_FORCED_SLEEP: + s->mode1_reg |= MAX3107_MODE1_FORCESLEEP_BIT; + break; + case MAX3107_DISABLE_AUTOSLEEP: + s->mode1_reg &= ~MAX3107_MODE1_AUTOSLEEP_BIT; + break; + case MAX3107_ENABLE_AUTOSLEEP: + s->mode1_reg |= MAX3107_MODE1_AUTOSLEEP_BIT; + break; + default: + spin_unlock_irqrestore(&s->data_lock, flags); + dev_warn(&s->spi->dev, "invalid sleep mode\n"); + return; + } + buf[0] |= s->mode1_reg; + spin_unlock_irqrestore(&s->data_lock, flags); + + if (max3107_rw(s, (u8 *)buf, NULL, 2)) + dev_err(&s->spi->dev, "SPI transfer sleep mode failed\n"); + + if (mode == MAX3107_DISABLE_AUTOSLEEP || + mode == MAX3107_DISABLE_FORCED_SLEEP) + msleep(MAX3107_WAKEUP_DELAY); +} + +/* Perform full register initialization */ +static void max3107_register_init(struct max3107_port *s) +{ + u16 buf[11]; /* Buffer for SPI transfers */ + + /* 1. Configure baud rate, 9600 as default */ + s->baud = 9600; + /* the below is default*/ + if (s->ext_clk) { + s->brg_cfg = MAX3107_BRG26_B9600; + s->baud_tbl = (struct baud_table *)brg26_ext; + } else { + s->brg_cfg = MAX3107_BRG13_IB9600; + s->baud_tbl = (struct baud_table *)brg13_int; + } + + if (s->pdata->init) + s->pdata->init(s); + + buf[0] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG) + | ((s->brg_cfg >> 16) & MAX3107_SPI_TX_DATA_MASK); + buf[1] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG) + | ((s->brg_cfg >> 8) & MAX3107_SPI_TX_DATA_MASK); + buf[2] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG) + | ((s->brg_cfg) & 0xff); + + /* 2. Configure LCR register, 8N1 mode by default */ + s->lcr_reg = MAX3107_LCR_WORD_LEN_8; + buf[3] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG) + | s->lcr_reg; + + /* 3. Configure MODE 1 register */ + s->mode1_reg = 0; + /* Enable IRQ pin */ + s->mode1_reg |= MAX3107_MODE1_IRQSEL_BIT; + /* Disable TX */ + s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; + s->tx_enabled = 0; + /* RX is enabled */ + s->rx_enabled = 1; + buf[4] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG) + | s->mode1_reg; + + /* 4. Configure MODE 2 register */ + buf[5] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); + if (s->loopback) { + /* Enable loopback */ + buf[5] |= MAX3107_MODE2_LOOPBACK_BIT; + } + /* Reset FIFOs */ + buf[5] |= MAX3107_MODE2_FIFORST_BIT; + s->tx_fifo_empty = 1; + + /* 5. Configure FIFO trigger level register */ + buf[6] = (MAX3107_WRITE_BIT | MAX3107_FIFOTRIGLVL_REG); + /* RX FIFO trigger for 16 words, TX FIFO trigger not used */ + buf[6] |= (MAX3107_FIFOTRIGLVL_RX(16) | MAX3107_FIFOTRIGLVL_TX(0)); + + /* 6. Configure flow control levels */ + buf[7] = (MAX3107_WRITE_BIT | MAX3107_FLOWLVL_REG); + /* Flow control halt level 96, resume level 48 */ + buf[7] |= (MAX3107_FLOWLVL_RES(48) | MAX3107_FLOWLVL_HALT(96)); + + /* 7. Configure flow control */ + buf[8] = (MAX3107_WRITE_BIT | MAX3107_FLOWCTRL_REG); + /* Enable auto CTS and auto RTS flow control */ + buf[8] |= (MAX3107_FLOWCTRL_AUTOCTS_BIT | MAX3107_FLOWCTRL_AUTORTS_BIT); + + /* 8. Configure RX timeout register */ + buf[9] = (MAX3107_WRITE_BIT | MAX3107_RXTO_REG); + /* Timeout after 48 character intervals */ + buf[9] |= 0x0030; + + /* 9. Configure LSR interrupt enable register */ + buf[10] = (MAX3107_WRITE_BIT | MAX3107_LSR_IRQEN_REG); + /* Enable RX timeout interrupt */ + buf[10] |= MAX3107_LSR_RXTO_BIT; + + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, 22)) + dev_err(&s->spi->dev, "SPI transfer for init failed\n"); + + /* 10. Clear IRQ status register by reading it */ + buf[0] = MAX3107_IRQSTS_REG; + + /* 11. Configure interrupt enable register */ + /* Enable LSR interrupt */ + s->irqen_reg = MAX3107_IRQ_LSR_BIT; + /* Enable RX FIFO interrupt */ + s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; + buf[1] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG) + | s->irqen_reg; + + /* 12. Clear FIFO reset that was set in step 6 */ + buf[2] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); + if (s->loopback) { + /* Keep loopback enabled */ + buf[2] |= MAX3107_MODE2_LOOPBACK_BIT; + } + + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 6)) + dev_err(&s->spi->dev, "SPI transfer for init failed\n"); + +} + +/* IRQ handler */ +static irqreturn_t max3107_irq(int irqno, void *dev_id) +{ + struct max3107_port *s = dev_id; + + if (irqno != s->spi->irq) { + /* Unexpected IRQ */ + return IRQ_NONE; + } + + /* Indicate irq */ + s->handle_irq = 1; + + /* Trigger work thread */ + max3107_dowork(s); + + return IRQ_HANDLED; +} + +/* HW suspension function + * + * Currently autosleep is used to decrease current consumption, alternative + * approach would be to set the chip to reset mode if UART is not being + * used but that would mess the GPIOs + * + */ +void max3107_hw_susp(struct max3107_port *s, int suspend) +{ + pr_debug("enter, suspend %d\n", suspend); + + if (suspend) { + /* Suspend requested, + * enable autosleep to decrease current consumption + */ + s->suspended = 1; + max3107_set_sleep(s, MAX3107_ENABLE_AUTOSLEEP); + } else { + /* Resume requested, + * disable autosleep + */ + s->suspended = 0; + max3107_set_sleep(s, MAX3107_DISABLE_AUTOSLEEP); + } +} +EXPORT_SYMBOL_GPL(max3107_hw_susp); + +/* Modem status IRQ enabling */ +static void max3107_enable_ms(struct uart_port *port) +{ + /* Modem status not supported */ +} + +/* Data send function */ +static void max3107_start_tx(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + + /* Trigger work thread for sending data */ + max3107_dowork(s); +} + +/* Function for checking that there is no pending transfers */ +static unsigned int max3107_tx_empty(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + + pr_debug("returning %d\n", + (s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit))); + return s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit); +} + +/* Function for stopping RX */ +static void max3107_stop_rx(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + unsigned long flags; + + /* Set RX disabled in MODE 1 register */ + spin_lock_irqsave(&s->data_lock, flags); + s->mode1_reg |= MAX3107_MODE1_RXDIS_BIT; + s->mode1_commit = 1; + spin_unlock_irqrestore(&s->data_lock, flags); + /* Set RX disabled */ + s->rx_enabled = 0; + /* Trigger work thread for doing the actual configuration change */ + max3107_dowork(s); +} + +/* Function for returning control pin states */ +static unsigned int max3107_get_mctrl(struct uart_port *port) +{ + /* DCD and DSR are not wired and CTS/RTS is handled automatically + * so just indicate DSR and CAR asserted + */ + return TIOCM_DSR | TIOCM_CAR; +} + +/* Function for setting control pin states */ +static void max3107_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* DCD and DSR are not wired and CTS/RTS is hadnled automatically + * so do nothing + */ +} + +/* Function for configuring UART parameters */ +static void max3107_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + struct tty_struct *tty; + int baud; + u16 new_lcr = 0; + u32 new_brg = 0; + unsigned long flags; + + if (!port->state) + return; + + tty = port->state->port.tty; + if (!tty) + return; + + /* Get new LCR register values */ + /* Word size */ + if ((termios->c_cflag & CSIZE) == CS7) + new_lcr |= MAX3107_LCR_WORD_LEN_7; + else + new_lcr |= MAX3107_LCR_WORD_LEN_8; + + /* Parity */ + if (termios->c_cflag & PARENB) { + new_lcr |= MAX3107_LCR_PARITY_BIT; + if (!(termios->c_cflag & PARODD)) + new_lcr |= MAX3107_LCR_EVENPARITY_BIT; + } + + /* Stop bits */ + if (termios->c_cflag & CSTOPB) { + /* 2 stop bits */ + new_lcr |= MAX3107_LCR_STOPLEN_BIT; + } + + /* Mask termios capabilities we don't support */ + termios->c_cflag &= ~CMSPAR; + + /* Set status ignore mask */ + s->port.ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + s->port.ignore_status_mask |= MAX3107_ALL_ERRORS; + + /* Set low latency to immediately handle pushed data */ + s->port.state->port.tty->low_latency = 1; + + /* Get new baud rate generator configuration */ + baud = tty_get_baud_rate(tty); + + spin_lock_irqsave(&s->data_lock, flags); + new_brg = get_new_brg(baud, s); + /* if can't find the corrent config, use previous */ + if (!new_brg) { + baud = s->baud; + new_brg = s->brg_cfg; + } + spin_unlock_irqrestore(&s->data_lock, flags); + tty_termios_encode_baud_rate(termios, baud, baud); + s->baud = baud; + + /* Update timeout according to new baud rate */ + uart_update_timeout(port, termios->c_cflag, baud); + + spin_lock_irqsave(&s->data_lock, flags); + if (s->lcr_reg != new_lcr) { + s->lcr_reg = new_lcr; + s->lcr_commit = 1; + } + if (s->brg_cfg != new_brg) { + s->brg_cfg = new_brg; + s->brg_commit = 1; + } + spin_unlock_irqrestore(&s->data_lock, flags); + + /* Trigger work thread for doing the actual configuration change */ + max3107_dowork(s); +} + +/* Port shutdown function */ +static void max3107_shutdown(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + + if (s->suspended && s->pdata->hw_suspend) + s->pdata->hw_suspend(s, 0); + + /* Free the interrupt */ + free_irq(s->spi->irq, s); + + if (s->workqueue) { + /* Flush and destroy work queue */ + flush_workqueue(s->workqueue); + destroy_workqueue(s->workqueue); + s->workqueue = NULL; + } + + /* Suspend HW */ + if (s->pdata->hw_suspend) + s->pdata->hw_suspend(s, 1); +} + +/* Port startup function */ +static int max3107_startup(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + + /* Initialize work queue */ + s->workqueue = create_freezeable_workqueue("max3107"); + if (!s->workqueue) { + dev_err(&s->spi->dev, "Workqueue creation failed\n"); + return -EBUSY; + } + INIT_WORK(&s->work, max3107_work); + + /* Setup IRQ */ + if (request_irq(s->spi->irq, max3107_irq, IRQF_TRIGGER_FALLING, + "max3107", s)) { + dev_err(&s->spi->dev, "IRQ reguest failed\n"); + destroy_workqueue(s->workqueue); + s->workqueue = NULL; + return -EBUSY; + } + + /* Resume HW */ + if (s->pdata->hw_suspend) + s->pdata->hw_suspend(s, 0); + + /* Init registers */ + max3107_register_init(s); + + return 0; +} + +/* Port type function */ +static const char *max3107_type(struct uart_port *port) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + return s->spi->modalias; +} + +/* Port release function */ +static void max3107_release_port(struct uart_port *port) +{ + /* Do nothing */ +} + +/* Port request function */ +static int max3107_request_port(struct uart_port *port) +{ + /* Do nothing */ + return 0; +} + +/* Port config function */ +static void max3107_config_port(struct uart_port *port, int flags) +{ + struct max3107_port *s = container_of(port, struct max3107_port, port); + s->port.type = PORT_MAX3107; +} + +/* Port verify function */ +static int max3107_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + if (ser->type == PORT_UNKNOWN || ser->type == PORT_MAX3107) + return 0; + + return -EINVAL; +} + +/* Port stop TX function */ +static void max3107_stop_tx(struct uart_port *port) +{ + /* Do nothing */ +} + +/* Port break control function */ +static void max3107_break_ctl(struct uart_port *port, int break_state) +{ + /* We don't support break control, do nothing */ +} + + +/* Port functions */ +static struct uart_ops max3107_ops = { + .tx_empty = max3107_tx_empty, + .set_mctrl = max3107_set_mctrl, + .get_mctrl = max3107_get_mctrl, + .stop_tx = max3107_stop_tx, + .start_tx = max3107_start_tx, + .stop_rx = max3107_stop_rx, + .enable_ms = max3107_enable_ms, + .break_ctl = max3107_break_ctl, + .startup = max3107_startup, + .shutdown = max3107_shutdown, + .set_termios = max3107_set_termios, + .type = max3107_type, + .release_port = max3107_release_port, + .request_port = max3107_request_port, + .config_port = max3107_config_port, + .verify_port = max3107_verify_port, +}; + +/* UART driver data */ +static struct uart_driver max3107_uart_driver = { + .owner = THIS_MODULE, + .driver_name = "ttyMAX", + .dev_name = "ttyMAX", + .nr = 1, +}; + +static int driver_registered = 0; + + + +/* 'Generic' platform data */ +static struct max3107_plat generic_plat_data = { + .loopback = 0, + .ext_clk = 1, + .hw_suspend = max3107_hw_susp, + .polled_mode = 0, + .poll_time = 0, +}; + + +/*******************************************************************/ + +/** + * max3107_probe - SPI bus probe entry point + * @spi: the spi device + * + * SPI wants us to probe this device and if appropriate claim it. + * Perform any platform specific requirements and then initialise + * the device. + */ + +int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata) +{ + struct max3107_port *s; + u16 buf[2]; /* Buffer for SPI transfers */ + int retval; + + pr_info("enter max3107 probe\n"); + + /* Allocate port structure */ + s = kzalloc(sizeof(*s), GFP_KERNEL); + if (!s) { + pr_err("Allocating port structure failed\n"); + return -ENOMEM; + } + + s->pdata = pdata; + + /* SPI Rx buffer + * +2 for RX FIFO interrupt + * disabling and RX level query + */ + s->rxbuf = kzalloc(sizeof(u16) * (MAX3107_RX_FIFO_SIZE+2), GFP_KERNEL); + if (!s->rxbuf) { + pr_err("Allocating RX buffer failed\n"); + return -ENOMEM; + } + s->rxstr = kzalloc(sizeof(u8) * MAX3107_RX_FIFO_SIZE, GFP_KERNEL); + if (!s->rxstr) { + pr_err("Allocating RX buffer failed\n"); + return -ENOMEM; + } + /* SPI Tx buffer + * SPI transfer buffer + * +3 for TX FIFO empty + * interrupt disabling and + * enabling and TX enabling + */ + s->txbuf = kzalloc(sizeof(u16) * MAX3107_TX_FIFO_SIZE + 3, GFP_KERNEL); + if (!s->txbuf) { + pr_err("Allocating TX buffer failed\n"); + return -ENOMEM; + } + /* Initialize shared data lock */ + spin_lock_init(&s->data_lock); + + /* SPI intializations */ + dev_set_drvdata(&spi->dev, s); + spi->mode = SPI_MODE_0; + spi->dev.platform_data = pdata; + spi->bits_per_word = 16; + s->ext_clk = pdata->ext_clk; + s->loopback = pdata->loopback; + spi_setup(spi); + s->spi = spi; + + /* Check REV ID to ensure we are talking to what we expect */ + buf[0] = MAX3107_REVID_REG; + if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { + dev_err(&s->spi->dev, "SPI transfer for REVID read failed\n"); + return -EIO; + } + if ((buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID1 && + (buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID2) { + dev_err(&s->spi->dev, "REVID %x does not match\n", + (buf[0] & MAX3107_SPI_RX_DATA_MASK)); + return -ENODEV; + } + + /* Disable all interrupts */ + buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG | 0x0000); + buf[0] |= 0x0000; + + /* Configure clock source */ + buf[1] = (MAX3107_WRITE_BIT | MAX3107_CLKSRC_REG); + if (s->ext_clk) { + /* External clock */ + buf[1] |= MAX3107_CLKSRC_EXTCLK_BIT; + } + + /* PLL bypass ON */ + buf[1] |= MAX3107_CLKSRC_PLLBYP_BIT; + + /* Perform SPI transfer */ + if (max3107_rw(s, (u8 *)buf, NULL, 4)) { + dev_err(&s->spi->dev, "SPI transfer for init failed\n"); + return -EIO; + } + + /* Register UART driver */ + if (!driver_registered) { + retval = uart_register_driver(&max3107_uart_driver); + if (retval) { + dev_err(&s->spi->dev, "Registering UART driver failed\n"); + return retval; + } + driver_registered = 1; + } + + /* Initialize UART port data */ + s->port.fifosize = 128; + s->port.ops = &max3107_ops; + s->port.line = 0; + s->port.dev = &spi->dev; + s->port.uartclk = 9600; + s->port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; + s->port.irq = s->spi->irq; + s->port.type = PORT_MAX3107; + + /* Add UART port */ + retval = uart_add_one_port(&max3107_uart_driver, &s->port); + if (retval < 0) { + dev_err(&s->spi->dev, "Adding UART port failed\n"); + return retval; + } + + if (pdata->configure) { + retval = pdata->configure(s); + if (retval < 0) + return retval; + } + + /* Go to suspend mode */ + if (pdata->hw_suspend) + pdata->hw_suspend(s, 1); + + return 0; +} +EXPORT_SYMBOL_GPL(max3107_probe); + +/* Driver remove function */ +int max3107_remove(struct spi_device *spi) +{ + struct max3107_port *s = dev_get_drvdata(&spi->dev); + + pr_info("enter max3107 remove\n"); + + /* Remove port */ + if (uart_remove_one_port(&max3107_uart_driver, &s->port)) + dev_warn(&s->spi->dev, "Removing UART port failed\n"); + + + /* Free TxRx buffer */ + kfree(s->rxbuf); + kfree(s->rxstr); + kfree(s->txbuf); + + /* Free port structure */ + kfree(s); + + return 0; +} +EXPORT_SYMBOL_GPL(max3107_remove); + +/* Driver suspend function */ +int max3107_suspend(struct spi_device *spi, pm_message_t state) +{ +#ifdef CONFIG_PM + struct max3107_port *s = dev_get_drvdata(&spi->dev); + + pr_debug("enter suspend\n"); + + /* Suspend UART port */ + uart_suspend_port(&max3107_uart_driver, &s->port); + + /* Go to suspend mode */ + if (s->pdata->hw_suspend) + s->pdata->hw_suspend(s, 1); +#endif /* CONFIG_PM */ + return 0; +} +EXPORT_SYMBOL_GPL(max3107_suspend); + +/* Driver resume function */ +int max3107_resume(struct spi_device *spi) +{ +#ifdef CONFIG_PM + struct max3107_port *s = dev_get_drvdata(&spi->dev); + + pr_debug("enter resume\n"); + + /* Resume from suspend */ + if (s->pdata->hw_suspend) + s->pdata->hw_suspend(s, 0); + + /* Resume UART port */ + uart_resume_port(&max3107_uart_driver, &s->port); +#endif /* CONFIG_PM */ + return 0; +} +EXPORT_SYMBOL_GPL(max3107_resume); + +static int max3107_probe_generic(struct spi_device *spi) +{ + return max3107_probe(spi, &generic_plat_data); +} + +/* Spi driver data */ +static struct spi_driver max3107_driver = { + .driver = { + .name = "max3107", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = max3107_probe_generic, + .remove = __devexit_p(max3107_remove), + .suspend = max3107_suspend, + .resume = max3107_resume, +}; + +/* Driver init function */ +static int __init max3107_init(void) +{ + pr_info("enter max3107 init\n"); + return spi_register_driver(&max3107_driver); +} + +/* Driver exit function */ +static void __exit max3107_exit(void) +{ + pr_info("enter max3107 exit\n"); + /* Unregister UART driver */ + if (driver_registered) + uart_unregister_driver(&max3107_uart_driver); + spi_unregister_driver(&max3107_driver); +} + +module_init(max3107_init); +module_exit(max3107_exit); + +MODULE_DESCRIPTION("MAX3107 driver"); +MODULE_AUTHOR("Aavamobile"); +MODULE_ALIAS("max3107-spi"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/max3107.h b/drivers/serial/max3107.h new file mode 100644 index 000000000000..7ab632392502 --- /dev/null +++ b/drivers/serial/max3107.h @@ -0,0 +1,441 @@ +/* + * max3107.h - spi uart protocol driver header for Maxim 3107 + * + * Copyright (C) Aavamobile 2009 + * Based on serial_max3100.h by Christian Pellegrin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef _MAX3107_H +#define _MAX3107_H + +/* Serial error status definitions */ +#define MAX3107_PARITY_ERROR 1 +#define MAX3107_FRAME_ERROR 2 +#define MAX3107_OVERRUN_ERROR 4 +#define MAX3107_ALL_ERRORS (MAX3107_PARITY_ERROR | \ + MAX3107_FRAME_ERROR | \ + MAX3107_OVERRUN_ERROR) + +/* GPIO definitions */ +#define MAX3107_GPIO_BASE 88 +#define MAX3107_GPIO_COUNT 4 + + +/* GPIO connected to chip's reset pin */ +#define MAX3107_RESET_GPIO 87 + + +/* Chip reset delay */ +#define MAX3107_RESET_DELAY 10 + +/* Chip wakeup delay */ +#define MAX3107_WAKEUP_DELAY 50 + + +/* Sleep mode definitions */ +#define MAX3107_DISABLE_FORCED_SLEEP 0 +#define MAX3107_ENABLE_FORCED_SLEEP 1 +#define MAX3107_DISABLE_AUTOSLEEP 2 +#define MAX3107_ENABLE_AUTOSLEEP 3 + + +/* Definitions for register access with SPI transfers + * + * SPI transfer format: + * + * Master to slave bits xzzzzzzzyyyyyyyy + * Slave to master bits aaaaaaaabbbbbbbb + * + * where: + * x = 0 for reads, 1 for writes + * z = register address + * y = new register value if write, 0 if read + * a = unspecified + * b = register value if read, unspecified if write + */ + +/* SPI speed */ +#define MAX3107_SPI_SPEED (3125000 * 2) + +/* Write bit */ +#define MAX3107_WRITE_BIT (1 << 15) + +/* SPI TX data mask */ +#define MAX3107_SPI_RX_DATA_MASK (0x00ff) + +/* SPI RX data mask */ +#define MAX3107_SPI_TX_DATA_MASK (0x00ff) + +/* Register access masks */ +#define MAX3107_RHR_REG (0x0000) /* RX FIFO */ +#define MAX3107_THR_REG (0x0000) /* TX FIFO */ +#define MAX3107_IRQEN_REG (0x0100) /* IRQ enable */ +#define MAX3107_IRQSTS_REG (0x0200) /* IRQ status */ +#define MAX3107_LSR_IRQEN_REG (0x0300) /* LSR IRQ enable */ +#define MAX3107_LSR_IRQSTS_REG (0x0400) /* LSR IRQ status */ +#define MAX3107_SPCHR_IRQEN_REG (0x0500) /* Special char IRQ enable */ +#define MAX3107_SPCHR_IRQSTS_REG (0x0600) /* Special char IRQ status */ +#define MAX3107_STS_IRQEN_REG (0x0700) /* Status IRQ enable */ +#define MAX3107_STS_IRQSTS_REG (0x0800) /* Status IRQ status */ +#define MAX3107_MODE1_REG (0x0900) /* MODE1 */ +#define MAX3107_MODE2_REG (0x0a00) /* MODE2 */ +#define MAX3107_LCR_REG (0x0b00) /* LCR */ +#define MAX3107_RXTO_REG (0x0c00) /* RX timeout */ +#define MAX3107_HDPIXDELAY_REG (0x0d00) /* Auto transceiver delays */ +#define MAX3107_IRDA_REG (0x0e00) /* IRDA settings */ +#define MAX3107_FLOWLVL_REG (0x0f00) /* Flow control levels */ +#define MAX3107_FIFOTRIGLVL_REG (0x1000) /* FIFO IRQ trigger levels */ +#define MAX3107_TXFIFOLVL_REG (0x1100) /* TX FIFO level */ +#define MAX3107_RXFIFOLVL_REG (0x1200) /* RX FIFO level */ +#define MAX3107_FLOWCTRL_REG (0x1300) /* Flow control */ +#define MAX3107_XON1_REG (0x1400) /* XON1 character */ +#define MAX3107_XON2_REG (0x1500) /* XON2 character */ +#define MAX3107_XOFF1_REG (0x1600) /* XOFF1 character */ +#define MAX3107_XOFF2_REG (0x1700) /* XOFF2 character */ +#define MAX3107_GPIOCFG_REG (0x1800) /* GPIO config */ +#define MAX3107_GPIODATA_REG (0x1900) /* GPIO data */ +#define MAX3107_PLLCFG_REG (0x1a00) /* PLL config */ +#define MAX3107_BRGCFG_REG (0x1b00) /* Baud rate generator conf */ +#define MAX3107_BRGDIVLSB_REG (0x1c00) /* Baud rate divisor LSB */ +#define MAX3107_BRGDIVMSB_REG (0x1d00) /* Baud rate divisor MSB */ +#define MAX3107_CLKSRC_REG (0x1e00) /* Clock source */ +#define MAX3107_REVID_REG (0x1f00) /* Revision identification */ + +/* IRQ register bits */ +#define MAX3107_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ +#define MAX3107_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ +#define MAX3107_IRQ_STS_BIT (1 << 2) /* Status interrupt */ +#define MAX3107_IRQ_RXFIFO_BIT (1 << 3) /* RX FIFO interrupt */ +#define MAX3107_IRQ_TXFIFO_BIT (1 << 4) /* TX FIFO interrupt */ +#define MAX3107_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */ +#define MAX3107_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */ +#define MAX3107_IRQ_CTS_BIT (1 << 7) /* CTS interrupt */ + +/* LSR register bits */ +#define MAX3107_LSR_RXTO_BIT (1 << 0) /* RX timeout */ +#define MAX3107_LSR_RXOVR_BIT (1 << 1) /* RX overrun */ +#define MAX3107_LSR_RXPAR_BIT (1 << 2) /* RX parity error */ +#define MAX3107_LSR_FRERR_BIT (1 << 3) /* Frame error */ +#define MAX3107_LSR_RXBRK_BIT (1 << 4) /* RX break */ +#define MAX3107_LSR_RXNOISE_BIT (1 << 5) /* RX noise */ +#define MAX3107_LSR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ +#define MAX3107_LSR_CTS_BIT (1 << 7) /* CTS pin state */ + +/* Special character register bits */ +#define MAX3107_SPCHR_XON1_BIT (1 << 0) /* XON1 character */ +#define MAX3107_SPCHR_XON2_BIT (1 << 1) /* XON2 character */ +#define MAX3107_SPCHR_XOFF1_BIT (1 << 2) /* XOFF1 character */ +#define MAX3107_SPCHR_XOFF2_BIT (1 << 3) /* XOFF2 character */ +#define MAX3107_SPCHR_BREAK_BIT (1 << 4) /* RX break */ +#define MAX3107_SPCHR_MULTIDROP_BIT (1 << 5) /* 9-bit multidrop addr char */ +#define MAX3107_SPCHR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ +#define MAX3107_SPCHR_UNDEF7_BIT (1 << 7) /* Undefined/not used */ + +/* Status register bits */ +#define MAX3107_STS_GPIO0_BIT (1 << 0) /* GPIO 0 interrupt */ +#define MAX3107_STS_GPIO1_BIT (1 << 1) /* GPIO 1 interrupt */ +#define MAX3107_STS_GPIO2_BIT (1 << 2) /* GPIO 2 interrupt */ +#define MAX3107_STS_GPIO3_BIT (1 << 3) /* GPIO 3 interrupt */ +#define MAX3107_STS_UNDEF4_BIT (1 << 4) /* Undefined/not used */ +#define MAX3107_STS_CLKREADY_BIT (1 << 5) /* Clock ready */ +#define MAX3107_STS_SLEEP_BIT (1 << 6) /* Sleep interrupt */ +#define MAX3107_STS_UNDEF7_BIT (1 << 7) /* Undefined/not used */ + +/* MODE1 register bits */ +#define MAX3107_MODE1_RXDIS_BIT (1 << 0) /* RX disable */ +#define MAX3107_MODE1_TXDIS_BIT (1 << 1) /* TX disable */ +#define MAX3107_MODE1_TXHIZ_BIT (1 << 2) /* TX pin three-state */ +#define MAX3107_MODE1_RTSHIZ_BIT (1 << 3) /* RTS pin three-state */ +#define MAX3107_MODE1_TRNSCVCTRL_BIT (1 << 4) /* Transceiver ctrl enable */ +#define MAX3107_MODE1_FORCESLEEP_BIT (1 << 5) /* Force sleep mode */ +#define MAX3107_MODE1_AUTOSLEEP_BIT (1 << 6) /* Auto sleep enable */ +#define MAX3107_MODE1_IRQSEL_BIT (1 << 7) /* IRQ pin enable */ + +/* MODE2 register bits */ +#define MAX3107_MODE2_RST_BIT (1 << 0) /* Chip reset */ +#define MAX3107_MODE2_FIFORST_BIT (1 << 1) /* FIFO reset */ +#define MAX3107_MODE2_RXTRIGINV_BIT (1 << 2) /* RX FIFO INT invert */ +#define MAX3107_MODE2_RXEMPTINV_BIT (1 << 3) /* RX FIFO empty INT invert */ +#define MAX3107_MODE2_SPCHR_BIT (1 << 4) /* Special chr detect enable */ +#define MAX3107_MODE2_LOOPBACK_BIT (1 << 5) /* Internal loopback enable */ +#define MAX3107_MODE2_MULTIDROP_BIT (1 << 6) /* 9-bit multidrop enable */ +#define MAX3107_MODE2_ECHOSUPR_BIT (1 << 7) /* ECHO suppression enable */ + +/* LCR register bits */ +#define MAX3107_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */ +#define MAX3107_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1 + * + * Word length bits table: + * 00 -> 5 bit words + * 01 -> 6 bit words + * 10 -> 7 bit words + * 11 -> 8 bit words + */ +#define MAX3107_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit + * + * STOP length bit table: + * 0 -> 1 stop bit + * 1 -> 1-1.5 stop bits if + * word length is 5, + * 2 stop bits otherwise + */ +#define MAX3107_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */ +#define MAX3107_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */ +#define MAX3107_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ +#define MAX3107_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ +#define MAX3107_LCR_RTS_BIT (1 << 7) /* RTS pin control */ +#define MAX3107_LCR_WORD_LEN_5 (0x0000) +#define MAX3107_LCR_WORD_LEN_6 (0x0001) +#define MAX3107_LCR_WORD_LEN_7 (0x0002) +#define MAX3107_LCR_WORD_LEN_8 (0x0003) + + +/* IRDA register bits */ +#define MAX3107_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ +#define MAX3107_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ +#define MAX3107_IRDA_SHORTIR_BIT (1 << 2) /* Short SIR mode enable */ +#define MAX3107_IRDA_MIR_BIT (1 << 3) /* MIR mode enable */ +#define MAX3107_IRDA_RXINV_BIT (1 << 4) /* RX logic inversion enable */ +#define MAX3107_IRDA_TXINV_BIT (1 << 5) /* TX logic inversion enable */ +#define MAX3107_IRDA_UNDEF6_BIT (1 << 6) /* Undefined/not used */ +#define MAX3107_IRDA_UNDEF7_BIT (1 << 7) /* Undefined/not used */ + +/* Flow control trigger level register masks */ +#define MAX3107_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ +#define MAX3107_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ +#define MAX3107_FLOWLVL_HALT(words) ((words/8) & 0x000f) +#define MAX3107_FLOWLVL_RES(words) (((words/8) & 0x000f) << 4) + +/* FIFO interrupt trigger level register masks */ +#define MAX3107_FIFOTRIGLVL_TX_MASK (0x000f) /* TX FIFO trigger level */ +#define MAX3107_FIFOTRIGLVL_RX_MASK (0x00f0) /* RX FIFO trigger level */ +#define MAX3107_FIFOTRIGLVL_TX(words) ((words/8) & 0x000f) +#define MAX3107_FIFOTRIGLVL_RX(words) (((words/8) & 0x000f) << 4) + +/* Flow control register bits */ +#define MAX3107_FLOWCTRL_AUTORTS_BIT (1 << 0) /* Auto RTS flow ctrl enable */ +#define MAX3107_FLOWCTRL_AUTOCTS_BIT (1 << 1) /* Auto CTS flow ctrl enable */ +#define MAX3107_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs + * are used in conjunction with + * XOFF2 for definition of + * special character */ +#define MAX3107_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ +#define MAX3107_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ +#define MAX3107_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 + * + * SWFLOW bits 1 & 0 table: + * 00 -> no transmitter flow + * control + * 01 -> receiver compares + * XON2 and XOFF2 + * and controls + * transmitter + * 10 -> receiver compares + * XON1 and XOFF1 + * and controls + * transmitter + * 11 -> receiver compares + * XON1, XON2, XOFF1 and + * XOFF2 and controls + * transmitter + */ +#define MAX3107_FLOWCTRL_SWFLOW2_BIT (1 << 6) /* SWFLOW bit 2 */ +#define MAX3107_FLOWCTRL_SWFLOW3_BIT (1 << 7) /* SWFLOW bit 3 + * + * SWFLOW bits 3 & 2 table: + * 00 -> no received flow + * control + * 01 -> transmitter generates + * XON2 and XOFF2 + * 10 -> transmitter generates + * XON1 and XOFF1 + * 11 -> transmitter generates + * XON1, XON2, XOFF1 and + * XOFF2 + */ + +/* GPIO configuration register bits */ +#define MAX3107_GPIOCFG_GP0OUT_BIT (1 << 0) /* GPIO 0 output enable */ +#define MAX3107_GPIOCFG_GP1OUT_BIT (1 << 1) /* GPIO 1 output enable */ +#define MAX3107_GPIOCFG_GP2OUT_BIT (1 << 2) /* GPIO 2 output enable */ +#define MAX3107_GPIOCFG_GP3OUT_BIT (1 << 3) /* GPIO 3 output enable */ +#define MAX3107_GPIOCFG_GP0OD_BIT (1 << 4) /* GPIO 0 open-drain enable */ +#define MAX3107_GPIOCFG_GP1OD_BIT (1 << 5) /* GPIO 1 open-drain enable */ +#define MAX3107_GPIOCFG_GP2OD_BIT (1 << 6) /* GPIO 2 open-drain enable */ +#define MAX3107_GPIOCFG_GP3OD_BIT (1 << 7) /* GPIO 3 open-drain enable */ + +/* GPIO DATA register bits */ +#define MAX3107_GPIODATA_GP0OUT_BIT (1 << 0) /* GPIO 0 output value */ +#define MAX3107_GPIODATA_GP1OUT_BIT (1 << 1) /* GPIO 1 output value */ +#define MAX3107_GPIODATA_GP2OUT_BIT (1 << 2) /* GPIO 2 output value */ +#define MAX3107_GPIODATA_GP3OUT_BIT (1 << 3) /* GPIO 3 output value */ +#define MAX3107_GPIODATA_GP0IN_BIT (1 << 4) /* GPIO 0 input value */ +#define MAX3107_GPIODATA_GP1IN_BIT (1 << 5) /* GPIO 1 input value */ +#define MAX3107_GPIODATA_GP2IN_BIT (1 << 6) /* GPIO 2 input value */ +#define MAX3107_GPIODATA_GP3IN_BIT (1 << 7) /* GPIO 3 input value */ + +/* PLL configuration register masks */ +#define MAX3107_PLLCFG_PREDIV_MASK (0x003f) /* PLL predivision value */ +#define MAX3107_PLLCFG_PLLFACTOR_MASK (0x00c0) /* PLL multiplication factor */ + +/* Baud rate generator configuration register masks and bits */ +#define MAX3107_BRGCFG_FRACT_MASK (0x000f) /* Fractional portion of + * Baud rate generator divisor + */ +#define MAX3107_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ +#define MAX3107_BRGCFG_4XMODE_BIT (1 << 5) /* Quadruple baud rate */ +#define MAX3107_BRGCFG_UNDEF6_BIT (1 << 6) /* Undefined/not used */ +#define MAX3107_BRGCFG_UNDEF7_BIT (1 << 7) /* Undefined/not used */ + +/* Clock source register bits */ +#define MAX3107_CLKSRC_INTOSC_BIT (1 << 0) /* Internal osc enable */ +#define MAX3107_CLKSRC_CRYST_BIT (1 << 1) /* Crystal osc enable */ +#define MAX3107_CLKSRC_PLL_BIT (1 << 2) /* PLL enable */ +#define MAX3107_CLKSRC_PLLBYP_BIT (1 << 3) /* PLL bypass */ +#define MAX3107_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ +#define MAX3107_CLKSRC_UNDEF5_BIT (1 << 5) /* Undefined/not used */ +#define MAX3107_CLKSRC_UNDEF6_BIT (1 << 6) /* Undefined/not used */ +#define MAX3107_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ + + +/* HW definitions */ +#define MAX3107_RX_FIFO_SIZE 128 +#define MAX3107_TX_FIFO_SIZE 128 +#define MAX3107_REVID1 0x00a0 +#define MAX3107_REVID2 0x00a1 + + +/* Baud rate generator configuration values for external clock 13MHz */ +#define MAX3107_BRG13_B300 (0x0A9400 | 0x05) +#define MAX3107_BRG13_B600 (0x054A00 | 0x03) +#define MAX3107_BRG13_B1200 (0x02A500 | 0x01) +#define MAX3107_BRG13_B2400 (0x015200 | 0x09) +#define MAX3107_BRG13_B4800 (0x00A900 | 0x04) +#define MAX3107_BRG13_B9600 (0x005400 | 0x0A) +#define MAX3107_BRG13_B19200 (0x002A00 | 0x05) +#define MAX3107_BRG13_B38400 (0x001500 | 0x03) +#define MAX3107_BRG13_B57600 (0x000E00 | 0x02) +#define MAX3107_BRG13_B115200 (0x000700 | 0x01) +#define MAX3107_BRG13_B230400 (0x000300 | 0x08) +#define MAX3107_BRG13_B460800 (0x000100 | 0x0c) +#define MAX3107_BRG13_B921600 (0x000100 | 0x1c) + +/* Baud rate generator configuration values for external clock 26MHz */ +#define MAX3107_BRG26_B300 (0x152800 | 0x0A) +#define MAX3107_BRG26_B600 (0x0A9400 | 0x05) +#define MAX3107_BRG26_B1200 (0x054A00 | 0x03) +#define MAX3107_BRG26_B2400 (0x02A500 | 0x01) +#define MAX3107_BRG26_B4800 (0x015200 | 0x09) +#define MAX3107_BRG26_B9600 (0x00A900 | 0x04) +#define MAX3107_BRG26_B19200 (0x005400 | 0x0A) +#define MAX3107_BRG26_B38400 (0x002A00 | 0x05) +#define MAX3107_BRG26_B57600 (0x001C00 | 0x03) +#define MAX3107_BRG26_B115200 (0x000E00 | 0x02) +#define MAX3107_BRG26_B230400 (0x000700 | 0x01) +#define MAX3107_BRG26_B460800 (0x000300 | 0x08) +#define MAX3107_BRG26_B921600 (0x000100 | 0x0C) + +/* Baud rate generator configuration values for internal clock */ +#define MAX3107_BRG13_IB300 (0x008000 | 0x00) +#define MAX3107_BRG13_IB600 (0x004000 | 0x00) +#define MAX3107_BRG13_IB1200 (0x002000 | 0x00) +#define MAX3107_BRG13_IB2400 (0x001000 | 0x00) +#define MAX3107_BRG13_IB4800 (0x000800 | 0x00) +#define MAX3107_BRG13_IB9600 (0x000400 | 0x00) +#define MAX3107_BRG13_IB19200 (0x000200 | 0x00) +#define MAX3107_BRG13_IB38400 (0x000100 | 0x00) +#define MAX3107_BRG13_IB57600 (0x000000 | 0x0B) +#define MAX3107_BRG13_IB115200 (0x000000 | 0x05) +#define MAX3107_BRG13_IB230400 (0x000000 | 0x03) +#define MAX3107_BRG13_IB460800 (0x000000 | 0x00) +#define MAX3107_BRG13_IB921600 (0x000000 | 0x00) + + +struct baud_table { + int baud; + u32 new_brg; +}; + +struct max3107_port { + /* UART port structure */ + struct uart_port port; + + /* SPI device structure */ + struct spi_device *spi; + +#if defined(CONFIG_GPIOLIB) + /* GPIO chip stucture */ + struct gpio_chip chip; +#endif + + /* Workqueue that does all the magic */ + struct workqueue_struct *workqueue; + struct work_struct work; + + /* Lock for shared data */ + spinlock_t data_lock; + + /* Device configuration */ + int ext_clk; /* 1 if external clock used */ + int loopback; /* Current loopback mode state */ + int baud; /* Current baud rate */ + + /* State flags */ + int suspended; /* Indicates suspend mode */ + int tx_fifo_empty; /* Flag for TX FIFO state */ + int rx_enabled; /* Flag for receiver state */ + int tx_enabled; /* Flag for transmitter state */ + + u16 irqen_reg; /* Current IRQ enable register value */ + /* Shared data */ + u16 mode1_reg; /* Current mode1 register value*/ + int mode1_commit; /* Flag for setting new mode1 register value */ + u16 lcr_reg; /* Current LCR register value */ + int lcr_commit; /* Flag for setting new LCR register value */ + u32 brg_cfg; /* Current Baud rate generator config */ + int brg_commit; /* Flag for setting new baud rate generator + * config + */ + struct baud_table *baud_tbl; + int handle_irq; /* Indicates that IRQ should be handled */ + + /* Rx buffer and str*/ + u16 *rxbuf; + u8 *rxstr; + /* Tx buffer*/ + u16 *txbuf; + + struct max3107_plat *pdata; /* Platform data */ +}; + +/* Platform data structure */ +struct max3107_plat { + /* Loopback mode enable */ + int loopback; + /* External clock enable */ + int ext_clk; + /* Called during the register initialisation */ + void (*init)(struct max3107_port *s); + /* Called when the port is found and configured */ + int (*configure)(struct max3107_port *s); + /* HW suspend function */ + void (*hw_suspend) (struct max3107_port *s, int suspend); + /* Polling mode enable */ + int polled_mode; + /* Polling period if polling mode enabled */ + int poll_time; +}; + +extern int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len); +extern void max3107_hw_susp(struct max3107_port *s, int suspend); +extern int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata); +extern int max3107_remove(struct spi_device *spi); +extern int max3107_suspend(struct spi_device *spi, pm_message_t state); +extern int max3107_resume(struct spi_device *spi); + +#endif /* _LINUX_SERIAL_MAX3107_H */ diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c index b5aaef965f24..3394b7cc1722 100644 --- a/drivers/serial/mcf.c +++ b/drivers/serial/mcf.c @@ -70,16 +70,14 @@ static unsigned int mcf_tx_empty(struct uart_port *port) static unsigned int mcf_get_mctrl(struct uart_port *port) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; unsigned int sigs; - spin_lock_irqsave(&port->lock, flags); sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ? 0 : TIOCM_CTS; sigs |= (pp->sigs & TIOCM_RTS); sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0); sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0); - spin_unlock_irqrestore(&port->lock, flags); + return sigs; } @@ -88,16 +86,13 @@ static unsigned int mcf_get_mctrl(struct uart_port *port) static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->sigs = sigs; mcf_setppdtr(port->line, (sigs & TIOCM_DTR)); if (sigs & TIOCM_RTS) writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1); else writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0); - spin_unlock_irqrestore(&port->lock, flags); } /****************************************************************************/ @@ -105,12 +100,9 @@ static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs) static void mcf_start_tx(struct uart_port *port) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr |= MCFUART_UIR_TXREADY; writeb(pp->imr, port->membase + MCFUART_UIMR); - spin_unlock_irqrestore(&port->lock, flags); } /****************************************************************************/ @@ -118,12 +110,9 @@ static void mcf_start_tx(struct uart_port *port) static void mcf_stop_tx(struct uart_port *port) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr &= ~MCFUART_UIR_TXREADY; writeb(pp->imr, port->membase + MCFUART_UIMR); - spin_unlock_irqrestore(&port->lock, flags); } /****************************************************************************/ @@ -131,12 +120,9 @@ static void mcf_stop_tx(struct uart_port *port) static void mcf_stop_rx(struct uart_port *port) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr &= ~MCFUART_UIR_RXREADY; writeb(pp->imr, port->membase + MCFUART_UIMR); - spin_unlock_irqrestore(&port->lock, flags); } /****************************************************************************/ @@ -366,13 +352,22 @@ static irqreturn_t mcf_interrupt(int irq, void *data) struct uart_port *port = data; struct mcf_uart *pp = container_of(port, struct mcf_uart, port); unsigned int isr; + irqreturn_t ret = IRQ_NONE; isr = readb(port->membase + MCFUART_UISR) & pp->imr; - if (isr & MCFUART_UIR_RXREADY) + + spin_lock(&port->lock); + if (isr & MCFUART_UIR_RXREADY) { mcf_rx_chars(pp); - if (isr & MCFUART_UIR_TXREADY) + ret = IRQ_HANDLED; + } + if (isr & MCFUART_UIR_TXREADY) { mcf_tx_chars(pp); - return IRQ_HANDLED; + ret = IRQ_HANDLED; + } + spin_unlock(&port->lock); + + return ret; } /****************************************************************************/ diff --git a/drivers/serial/mfd.c b/drivers/serial/mfd.c new file mode 100644 index 000000000000..bc9af503907f --- /dev/null +++ b/drivers/serial/mfd.c @@ -0,0 +1,1498 @@ +/* + * mfd.c: driver for High Speed UART device of Intel Medfield platform + * + * Refer pxa.c, 8250.c and some other drivers in drivers/serial/ + * + * (C) Copyright 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; version 2 + * of the License. + */ + +/* Notes: + * 1. DMA channel allocation: 0/1 channel are assigned to port 0, + * 2/3 chan to port 1, 4/5 chan to port 3. Even number chans + * are used for RX, odd chans for TX + * + * 2. In A0 stepping, UART will not support TX half empty flag + * + * 3. The RI/DSR/DCD/DTR are not pinned out, DCD & DSR are always + * asserted, only when the HW is reset the DDCD and DDSR will + * be triggered + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/serial_reg.h> +#include <linux/circ_buf.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial_core.h> +#include <linux/serial_mfd.h> +#include <linux/dma-mapping.h> +#include <linux/pci.h> +#include <linux/io.h> +#include <linux/debugfs.h> + +#define MFD_HSU_A0_STEPPING 1 + +#define HSU_DMA_BUF_SIZE 2048 + +#define chan_readl(chan, offset) readl(chan->reg + offset) +#define chan_writel(chan, offset, val) writel(val, chan->reg + offset) + +#define mfd_readl(obj, offset) readl(obj->reg + offset) +#define mfd_writel(obj, offset, val) writel(val, obj->reg + offset) + +#define HSU_DMA_TIMEOUT_CHECK_FREQ (HZ/10) + +struct hsu_dma_buffer { + u8 *buf; + dma_addr_t dma_addr; + u32 dma_size; + u32 ofs; +}; + +struct hsu_dma_chan { + u32 id; + enum dma_data_direction dirt; + struct uart_hsu_port *uport; + void __iomem *reg; + struct timer_list rx_timer; /* only needed by RX channel */ +}; + +struct uart_hsu_port { + struct uart_port port; + unsigned char ier; + unsigned char lcr; + unsigned char mcr; + unsigned int lsr_break_flag; + char name[12]; + int index; + struct device *dev; + + struct hsu_dma_chan *txc; + struct hsu_dma_chan *rxc; + struct hsu_dma_buffer txbuf; + struct hsu_dma_buffer rxbuf; + int use_dma; /* flag for DMA/PIO */ + int running; + int dma_tx_on; +}; + +/* Top level data structure of HSU */ +struct hsu_port { + void __iomem *reg; + unsigned long paddr; + unsigned long iolen; + u32 irq; + + struct uart_hsu_port port[3]; + struct hsu_dma_chan chans[10]; + + struct dentry *debugfs; +}; + +static inline unsigned int serial_in(struct uart_hsu_port *up, int offset) +{ + unsigned int val; + + if (offset > UART_MSR) { + offset <<= 2; + val = readl(up->port.membase + offset); + } else + val = (unsigned int)readb(up->port.membase + offset); + + return val; +} + +static inline void serial_out(struct uart_hsu_port *up, int offset, int value) +{ + if (offset > UART_MSR) { + offset <<= 2; + writel(value, up->port.membase + offset); + } else { + unsigned char val = value & 0xff; + writeb(val, up->port.membase + offset); + } +} + +#ifdef CONFIG_DEBUG_FS + +#define HSU_REGS_BUFSIZE 1024 + +static int hsu_show_regs_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t port_show_regs(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct uart_hsu_port *up = file->private_data; + char *buf; + u32 len = 0; + ssize_t ret; + + buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL); + if (!buf) + return 0; + + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MFD HSU port[%d] regs:\n", up->index); + + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "=================================\n"); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "IER: \t\t0x%08x\n", serial_in(up, UART_IER)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "IIR: \t\t0x%08x\n", serial_in(up, UART_IIR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "LCR: \t\t0x%08x\n", serial_in(up, UART_LCR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MCR: \t\t0x%08x\n", serial_in(up, UART_MCR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "LSR: \t\t0x%08x\n", serial_in(up, UART_LSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MSR: \t\t0x%08x\n", serial_in(up, UART_MSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "FOR: \t\t0x%08x\n", serial_in(up, UART_FOR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "PS: \t\t0x%08x\n", serial_in(up, UART_PS)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MUL: \t\t0x%08x\n", serial_in(up, UART_MUL)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "DIV: \t\t0x%08x\n", serial_in(up, UART_DIV)); + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + return ret; +} + +static ssize_t dma_show_regs(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct hsu_dma_chan *chan = file->private_data; + char *buf; + u32 len = 0; + ssize_t ret; + + buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL); + if (!buf) + return 0; + + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MFD HSU DMA channel [%d] regs:\n", chan->id); + + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "=================================\n"); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "CR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_CR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "DCR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_DCR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "BSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_BSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "MOTSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_MOTSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0SAR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0TSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1SAR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1TSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2SAR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2TSR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3SAR)); + len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, + "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3TSR)); + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + return ret; +} + +static const struct file_operations port_regs_ops = { + .owner = THIS_MODULE, + .open = hsu_show_regs_open, + .read = port_show_regs, +}; + +static const struct file_operations dma_regs_ops = { + .owner = THIS_MODULE, + .open = hsu_show_regs_open, + .read = dma_show_regs, +}; + +static int hsu_debugfs_init(struct hsu_port *hsu) +{ + int i; + char name[32]; + + hsu->debugfs = debugfs_create_dir("hsu", NULL); + if (!hsu->debugfs) + return -ENOMEM; + + for (i = 0; i < 3; i++) { + snprintf(name, sizeof(name), "port_%d_regs", i); + debugfs_create_file(name, S_IFREG | S_IRUGO, + hsu->debugfs, (void *)(&hsu->port[i]), &port_regs_ops); + } + + for (i = 0; i < 6; i++) { + snprintf(name, sizeof(name), "dma_chan_%d_regs", i); + debugfs_create_file(name, S_IFREG | S_IRUGO, + hsu->debugfs, (void *)&hsu->chans[i], &dma_regs_ops); + } + + return 0; +} + +static void hsu_debugfs_remove(struct hsu_port *hsu) +{ + if (hsu->debugfs) + debugfs_remove_recursive(hsu->debugfs); +} + +#else +static inline int hsu_debugfs_init(struct hsu_port *hsu) +{ + return 0; +} + +static inline void hsu_debugfs_remove(struct hsu_port *hsu) +{ +} +#endif /* CONFIG_DEBUG_FS */ + +static void serial_hsu_enable_ms(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + + up->ier |= UART_IER_MSI; + serial_out(up, UART_IER, up->ier); +} + +void hsu_dma_tx(struct uart_hsu_port *up) +{ + struct circ_buf *xmit = &up->port.state->xmit; + struct hsu_dma_buffer *dbuf = &up->txbuf; + int count; + + /* test_and_set_bit may be better, but anyway it's in lock protected mode */ + if (up->dma_tx_on) + return; + + /* Update the circ buf info */ + xmit->tail += dbuf->ofs; + xmit->tail &= UART_XMIT_SIZE - 1; + + up->port.icount.tx += dbuf->ofs; + dbuf->ofs = 0; + + /* Disable the channel */ + chan_writel(up->txc, HSU_CH_CR, 0x0); + + if (!uart_circ_empty(xmit) && !uart_tx_stopped(&up->port)) { + dma_sync_single_for_device(up->port.dev, + dbuf->dma_addr, + dbuf->dma_size, + DMA_TO_DEVICE); + + count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); + dbuf->ofs = count; + + /* Reprogram the channel */ + chan_writel(up->txc, HSU_CH_D0SAR, dbuf->dma_addr + xmit->tail); + chan_writel(up->txc, HSU_CH_D0TSR, count); + + /* Reenable the channel */ + chan_writel(up->txc, HSU_CH_DCR, 0x1 + | (0x1 << 8) + | (0x1 << 16) + | (0x1 << 24)); + up->dma_tx_on = 1; + chan_writel(up->txc, HSU_CH_CR, 0x1); + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&up->port); +} + +/* The buffer is already cache coherent */ +void hsu_dma_start_rx_chan(struct hsu_dma_chan *rxc, struct hsu_dma_buffer *dbuf) +{ + dbuf->ofs = 0; + + chan_writel(rxc, HSU_CH_BSR, 32); + chan_writel(rxc, HSU_CH_MOTSR, 4); + + chan_writel(rxc, HSU_CH_D0SAR, dbuf->dma_addr); + chan_writel(rxc, HSU_CH_D0TSR, dbuf->dma_size); + chan_writel(rxc, HSU_CH_DCR, 0x1 | (0x1 << 8) + | (0x1 << 16) + | (0x1 << 24) /* timeout bit, see HSU Errata 1 */ + ); + chan_writel(rxc, HSU_CH_CR, 0x3); + + mod_timer(&rxc->rx_timer, jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ); +} + +/* Protected by spin_lock_irqsave(port->lock) */ +static void serial_hsu_start_tx(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + + if (up->use_dma) { + hsu_dma_tx(up); + } else if (!(up->ier & UART_IER_THRI)) { + up->ier |= UART_IER_THRI; + serial_out(up, UART_IER, up->ier); + } +} + +static void serial_hsu_stop_tx(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + struct hsu_dma_chan *txc = up->txc; + + if (up->use_dma) + chan_writel(txc, HSU_CH_CR, 0x0); + else if (up->ier & UART_IER_THRI) { + up->ier &= ~UART_IER_THRI; + serial_out(up, UART_IER, up->ier); + } +} + +/* This is always called in spinlock protected mode, so + * modify timeout timer is safe here */ +void hsu_dma_rx(struct uart_hsu_port *up, u32 int_sts) +{ + struct hsu_dma_buffer *dbuf = &up->rxbuf; + struct hsu_dma_chan *chan = up->rxc; + struct uart_port *port = &up->port; + struct tty_struct *tty = port->state->port.tty; + int count; + + if (!tty) + return; + + /* + * First need to know how many is already transferred, + * then check if its a timeout DMA irq, and return + * the trail bytes out, push them up and reenable the + * channel + */ + + /* Timeout IRQ, need wait some time, see Errata 2 */ + if (int_sts & 0xf00) + udelay(2); + + /* Stop the channel */ + chan_writel(chan, HSU_CH_CR, 0x0); + + count = chan_readl(chan, HSU_CH_D0SAR) - dbuf->dma_addr; + if (!count) { + /* Restart the channel before we leave */ + chan_writel(chan, HSU_CH_CR, 0x3); + return; + } + del_timer(&chan->rx_timer); + + dma_sync_single_for_cpu(port->dev, dbuf->dma_addr, + dbuf->dma_size, DMA_FROM_DEVICE); + + /* + * Head will only wrap around when we recycle + * the DMA buffer, and when that happens, we + * explicitly set tail to 0. So head will + * always be greater than tail. + */ + tty_insert_flip_string(tty, dbuf->buf, count); + port->icount.rx += count; + + dma_sync_single_for_device(up->port.dev, dbuf->dma_addr, + dbuf->dma_size, DMA_FROM_DEVICE); + + /* Reprogram the channel */ + chan_writel(chan, HSU_CH_D0SAR, dbuf->dma_addr); + chan_writel(chan, HSU_CH_D0TSR, dbuf->dma_size); + chan_writel(chan, HSU_CH_DCR, 0x1 + | (0x1 << 8) + | (0x1 << 16) + | (0x1 << 24) /* timeout bit, see HSU Errata 1 */ + ); + tty_flip_buffer_push(tty); + + chan_writel(chan, HSU_CH_CR, 0x3); + chan->rx_timer.expires = jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ; + add_timer(&chan->rx_timer); + +} + +static void serial_hsu_stop_rx(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + struct hsu_dma_chan *chan = up->rxc; + + if (up->use_dma) + chan_writel(chan, HSU_CH_CR, 0x2); + else { + up->ier &= ~UART_IER_RLSI; + up->port.read_status_mask &= ~UART_LSR_DR; + serial_out(up, UART_IER, up->ier); + } +} + +static inline void receive_chars(struct uart_hsu_port *up, int *status) +{ + struct tty_struct *tty = up->port.state->port.tty; + unsigned int ch, flag; + unsigned int max_count = 256; + + if (!tty) + return; + + do { + ch = serial_in(up, UART_RX); + flag = TTY_NORMAL; + up->port.icount.rx++; + + if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | + UART_LSR_FE | UART_LSR_OE))) { + + dev_warn(up->dev, "We really rush into ERR/BI case" + "status = 0x%02x", *status); + /* For statistics only */ + if (*status & UART_LSR_BI) { + *status &= ~(UART_LSR_FE | UART_LSR_PE); + up->port.icount.brk++; + /* + * We do the SysRQ and SAK checking + * here because otherwise the break + * may get masked by ignore_status_mask + * or read_status_mask. + */ + if (uart_handle_break(&up->port)) + goto ignore_char; + } else if (*status & UART_LSR_PE) + up->port.icount.parity++; + else if (*status & UART_LSR_FE) + up->port.icount.frame++; + if (*status & UART_LSR_OE) + up->port.icount.overrun++; + + /* Mask off conditions which should be ignored. */ + *status &= up->port.read_status_mask; + +#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE + if (up->port.cons && + up->port.cons->index == up->port.line) { + /* Recover the break flag from console xmit */ + *status |= up->lsr_break_flag; + up->lsr_break_flag = 0; + } +#endif + if (*status & UART_LSR_BI) { + flag = TTY_BREAK; + } else if (*status & UART_LSR_PE) + flag = TTY_PARITY; + else if (*status & UART_LSR_FE) + flag = TTY_FRAME; + } + + if (uart_handle_sysrq_char(&up->port, ch)) + goto ignore_char; + + uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag); + ignore_char: + *status = serial_in(up, UART_LSR); + } while ((*status & UART_LSR_DR) && max_count--); + tty_flip_buffer_push(tty); +} + +static void transmit_chars(struct uart_hsu_port *up) +{ + struct circ_buf *xmit = &up->port.state->xmit; + int count; + + if (up->port.x_char) { + serial_out(up, UART_TX, up->port.x_char); + up->port.icount.tx++; + up->port.x_char = 0; + return; + } + if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { + serial_hsu_stop_tx(&up->port); + return; + } + +#ifndef MFD_HSU_A0_STEPPING + count = up->port.fifosize / 2; +#else + /* + * A0 only supports fully empty IRQ, and the first char written + * into it won't clear the EMPT bit, so we may need be cautious + * by useing a shorter buffer + */ + count = up->port.fifosize - 4; +#endif + do { + serial_out(up, UART_TX, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + + up->port.icount.tx++; + if (uart_circ_empty(xmit)) + break; + } while (--count > 0); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&up->port); + + if (uart_circ_empty(xmit)) + serial_hsu_stop_tx(&up->port); +} + +static inline void check_modem_status(struct uart_hsu_port *up) +{ + int status; + + status = serial_in(up, UART_MSR); + + if ((status & UART_MSR_ANY_DELTA) == 0) + return; + + if (status & UART_MSR_TERI) + up->port.icount.rng++; + if (status & UART_MSR_DDSR) + up->port.icount.dsr++; + /* We may only get DDCD when HW init and reset */ + if (status & UART_MSR_DDCD) + uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); + /* Will start/stop_tx accordingly */ + if (status & UART_MSR_DCTS) + uart_handle_cts_change(&up->port, status & UART_MSR_CTS); + + wake_up_interruptible(&up->port.state->port.delta_msr_wait); +} + +/* + * This handles the interrupt from one port. + */ +static irqreturn_t port_irq(int irq, void *dev_id) +{ + struct uart_hsu_port *up = dev_id; + unsigned int iir, lsr; + unsigned long flags; + + if (unlikely(!up->running)) + return IRQ_NONE; + + spin_lock_irqsave(&up->port.lock, flags); + if (up->use_dma) { + lsr = serial_in(up, UART_LSR); + if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE | + UART_LSR_FE | UART_LSR_OE))) + dev_warn(up->dev, + "Got lsr irq while using DMA, lsr = 0x%2x\n", + lsr); + check_modem_status(up); + spin_unlock_irqrestore(&up->port.lock, flags); + return IRQ_HANDLED; + } + + iir = serial_in(up, UART_IIR); + if (iir & UART_IIR_NO_INT) { + spin_unlock_irqrestore(&up->port.lock, flags); + return IRQ_NONE; + } + + lsr = serial_in(up, UART_LSR); + if (lsr & UART_LSR_DR) + receive_chars(up, &lsr); + check_modem_status(up); + + /* lsr will be renewed during the receive_chars */ + if (lsr & UART_LSR_THRE) + transmit_chars(up); + + spin_unlock_irqrestore(&up->port.lock, flags); + return IRQ_HANDLED; +} + +static inline void dma_chan_irq(struct hsu_dma_chan *chan) +{ + struct uart_hsu_port *up = chan->uport; + unsigned long flags; + u32 int_sts; + + spin_lock_irqsave(&up->port.lock, flags); + + if (!up->use_dma || !up->running) + goto exit; + + /* + * No matter what situation, need read clear the IRQ status + * There is a bug, see Errata 5, HSD 2900918 + */ + int_sts = chan_readl(chan, HSU_CH_SR); + + /* Rx channel */ + if (chan->dirt == DMA_FROM_DEVICE) + hsu_dma_rx(up, int_sts); + + /* Tx channel */ + if (chan->dirt == DMA_TO_DEVICE) { + chan_writel(chan, HSU_CH_CR, 0x0); + up->dma_tx_on = 0; + hsu_dma_tx(up); + } + +exit: + spin_unlock_irqrestore(&up->port.lock, flags); + return; +} + +static irqreturn_t dma_irq(int irq, void *dev_id) +{ + struct hsu_port *hsu = dev_id; + u32 int_sts, i; + + int_sts = mfd_readl(hsu, HSU_GBL_DMAISR); + + /* Currently we only have 6 channels may be used */ + for (i = 0; i < 6; i++) { + if (int_sts & 0x1) + dma_chan_irq(&hsu->chans[i]); + int_sts >>= 1; + } + + return IRQ_HANDLED; +} + +static unsigned int serial_hsu_tx_empty(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned long flags; + unsigned int ret; + + spin_lock_irqsave(&up->port.lock, flags); + ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; + spin_unlock_irqrestore(&up->port.lock, flags); + + return ret; +} + +static unsigned int serial_hsu_get_mctrl(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned char status; + unsigned int ret; + + status = serial_in(up, UART_MSR); + + ret = 0; + if (status & UART_MSR_DCD) + ret |= TIOCM_CAR; + if (status & UART_MSR_RI) + ret |= TIOCM_RNG; + if (status & UART_MSR_DSR) + ret |= TIOCM_DSR; + if (status & UART_MSR_CTS) + ret |= TIOCM_CTS; + return ret; +} + +static void serial_hsu_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned char mcr = 0; + + if (mctrl & TIOCM_RTS) + mcr |= UART_MCR_RTS; + if (mctrl & TIOCM_DTR) + mcr |= UART_MCR_DTR; + if (mctrl & TIOCM_OUT1) + mcr |= UART_MCR_OUT1; + if (mctrl & TIOCM_OUT2) + mcr |= UART_MCR_OUT2; + if (mctrl & TIOCM_LOOP) + mcr |= UART_MCR_LOOP; + + mcr |= up->mcr; + + serial_out(up, UART_MCR, mcr); +} + +static void serial_hsu_break_ctl(struct uart_port *port, int break_state) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned long flags; + + spin_lock_irqsave(&up->port.lock, flags); + if (break_state == -1) + up->lcr |= UART_LCR_SBC; + else + up->lcr &= ~UART_LCR_SBC; + serial_out(up, UART_LCR, up->lcr); + spin_unlock_irqrestore(&up->port.lock, flags); +} + +/* + * What special to do: + * 1. chose the 64B fifo mode + * 2. make sure not to select half empty mode for A0 stepping + * 3. start dma or pio depends on configuration + * 4. we only allocate dma memory when needed + */ +static int serial_hsu_startup(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned long flags; + + /* + * Clear the FIFO buffers and disable them. + * (they will be reenabled in set_termios()) + */ + serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); + serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); + serial_out(up, UART_FCR, 0); + + /* Clear the interrupt registers. */ + (void) serial_in(up, UART_LSR); + (void) serial_in(up, UART_RX); + (void) serial_in(up, UART_IIR); + (void) serial_in(up, UART_MSR); + + /* Now, initialize the UART, default is 8n1 */ + serial_out(up, UART_LCR, UART_LCR_WLEN8); + + spin_lock_irqsave(&up->port.lock, flags); + + up->port.mctrl |= TIOCM_OUT2; + serial_hsu_set_mctrl(&up->port, up->port.mctrl); + + /* + * Finally, enable interrupts. Note: Modem status interrupts + * are set via set_termios(), which will be occurring imminently + * anyway, so we don't enable them here. + */ + if (!up->use_dma) + up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE; + else + up->ier = 0; + serial_out(up, UART_IER, up->ier); + + spin_unlock_irqrestore(&up->port.lock, flags); + + /* DMA init */ + if (up->use_dma) { + struct hsu_dma_buffer *dbuf; + struct circ_buf *xmit = &port->state->xmit; + + up->dma_tx_on = 0; + + /* First allocate the RX buffer */ + dbuf = &up->rxbuf; + dbuf->buf = kzalloc(HSU_DMA_BUF_SIZE, GFP_KERNEL); + if (!dbuf->buf) { + up->use_dma = 0; + goto exit; + } + dbuf->dma_addr = dma_map_single(port->dev, + dbuf->buf, + HSU_DMA_BUF_SIZE, + DMA_FROM_DEVICE); + dbuf->dma_size = HSU_DMA_BUF_SIZE; + + /* Start the RX channel right now */ + hsu_dma_start_rx_chan(up->rxc, dbuf); + + /* Next init the TX DMA */ + dbuf = &up->txbuf; + dbuf->buf = xmit->buf; + dbuf->dma_addr = dma_map_single(port->dev, + dbuf->buf, + UART_XMIT_SIZE, + DMA_TO_DEVICE); + dbuf->dma_size = UART_XMIT_SIZE; + + /* This should not be changed all around */ + chan_writel(up->txc, HSU_CH_BSR, 32); + chan_writel(up->txc, HSU_CH_MOTSR, 4); + dbuf->ofs = 0; + } + +exit: + /* And clear the interrupt registers again for luck. */ + (void) serial_in(up, UART_LSR); + (void) serial_in(up, UART_RX); + (void) serial_in(up, UART_IIR); + (void) serial_in(up, UART_MSR); + + up->running = 1; + return 0; +} + +static void serial_hsu_shutdown(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + unsigned long flags; + + del_timer_sync(&up->rxc->rx_timer); + + /* Disable interrupts from this port */ + up->ier = 0; + serial_out(up, UART_IER, 0); + up->running = 0; + + spin_lock_irqsave(&up->port.lock, flags); + up->port.mctrl &= ~TIOCM_OUT2; + serial_hsu_set_mctrl(&up->port, up->port.mctrl); + spin_unlock_irqrestore(&up->port.lock, flags); + + /* Disable break condition and FIFOs */ + serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC); + serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | + UART_FCR_CLEAR_XMIT); + serial_out(up, UART_FCR, 0); +} + +static void +serial_hsu_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + struct tty_struct *tty = port->state->port.tty; + unsigned char cval, fcr = 0; + unsigned long flags; + unsigned int baud, quot; + u32 mul = 0x3600; + u32 ps = 0x10; + + switch (termios->c_cflag & CSIZE) { + case CS5: + cval = UART_LCR_WLEN5; + break; + case CS6: + cval = UART_LCR_WLEN6; + break; + case CS7: + cval = UART_LCR_WLEN7; + break; + default: + case CS8: + cval = UART_LCR_WLEN8; + break; + } + + /* CMSPAR isn't supported by this driver */ + if (tty) + tty->termios->c_cflag &= ~CMSPAR; + + if (termios->c_cflag & CSTOPB) + cval |= UART_LCR_STOP; + if (termios->c_cflag & PARENB) + cval |= UART_LCR_PARITY; + if (!(termios->c_cflag & PARODD)) + cval |= UART_LCR_EPAR; + + /* + * For those basic low baud rate we can get the direct + * scalar from 2746800, like 115200 = 2746800/24, for those + * higher baud rate, we have to handle them case by case, + * but DIV reg is never touched as its default value 0x3d09 + */ + baud = uart_get_baud_rate(port, termios, old, 0, 4000000); + quot = uart_get_divisor(port, baud); + + switch (baud) { + case 3500000: + mul = 0x3345; + ps = 0xC; + quot = 1; + break; + case 2500000: + mul = 0x2710; + ps = 0x10; + quot = 1; + break; + case 18432000: + mul = 0x2400; + ps = 0x10; + quot = 1; + break; + case 1500000: + mul = 0x1D4C; + ps = 0xc; + quot = 1; + break; + default: + ; + } + + if ((up->port.uartclk / quot) < (2400 * 16)) + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B; + else if ((up->port.uartclk / quot) < (230400 * 16)) + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_16B; + else + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_32B; + + fcr |= UART_FCR_HSU_64B_FIFO; +#ifdef MFD_HSU_A0_STEPPING + /* A0 doesn't support half empty IRQ */ + fcr |= UART_FCR_FULL_EMPT_TXI; +#endif + + /* + * Ok, we're now changing the port state. Do it with + * interrupts disabled. + */ + spin_lock_irqsave(&up->port.lock, flags); + + /* Update the per-port timeout */ + uart_update_timeout(port, termios->c_cflag, baud); + + up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; + if (termios->c_iflag & INPCK) + up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; + if (termios->c_iflag & (BRKINT | PARMRK)) + up->port.read_status_mask |= UART_LSR_BI; + + /* Characters to ignore */ + up->port.ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; + if (termios->c_iflag & IGNBRK) { + up->port.ignore_status_mask |= UART_LSR_BI; + /* + * If we're ignoring parity and break indicators, + * ignore overruns too (for real raw support). + */ + if (termios->c_iflag & IGNPAR) + up->port.ignore_status_mask |= UART_LSR_OE; + } + + /* Ignore all characters if CREAD is not set */ + if ((termios->c_cflag & CREAD) == 0) + up->port.ignore_status_mask |= UART_LSR_DR; + + /* + * CTS flow control flag and modem status interrupts, disable + * MSI by default + */ + up->ier &= ~UART_IER_MSI; + if (UART_ENABLE_MS(&up->port, termios->c_cflag)) + up->ier |= UART_IER_MSI; + + serial_out(up, UART_IER, up->ier); + + if (termios->c_cflag & CRTSCTS) + up->mcr |= UART_MCR_AFE | UART_MCR_RTS; + else + up->mcr &= ~UART_MCR_AFE; + + serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */ + serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ + serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ + serial_out(up, UART_LCR, cval); /* reset DLAB */ + serial_out(up, UART_MUL, mul); /* set MUL */ + serial_out(up, UART_PS, ps); /* set PS */ + up->lcr = cval; /* Save LCR */ + serial_hsu_set_mctrl(&up->port, up->port.mctrl); + serial_out(up, UART_FCR, fcr); + spin_unlock_irqrestore(&up->port.lock, flags); +} + +static void +serial_hsu_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ +} + +static void serial_hsu_release_port(struct uart_port *port) +{ +} + +static int serial_hsu_request_port(struct uart_port *port) +{ + return 0; +} + +static void serial_hsu_config_port(struct uart_port *port, int flags) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + up->port.type = PORT_MFD; +} + +static int +serial_hsu_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + /* We don't want the core code to modify any port params */ + return -EINVAL; +} + +static const char * +serial_hsu_type(struct uart_port *port) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + return up->name; +} + +/* Mainly for uart console use */ +static struct uart_hsu_port *serial_hsu_ports[3]; +static struct uart_driver serial_hsu_reg; + +#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE + +#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) + +/* Wait for transmitter & holding register to empty */ +static inline void wait_for_xmitr(struct uart_hsu_port *up) +{ + unsigned int status, tmout = 1000; + + /* Wait up to 1ms for the character to be sent. */ + do { + status = serial_in(up, UART_LSR); + + if (status & UART_LSR_BI) + up->lsr_break_flag = UART_LSR_BI; + + if (--tmout == 0) + break; + udelay(1); + } while (!(status & BOTH_EMPTY)); + + /* Wait up to 1s for flow control if necessary */ + if (up->port.flags & UPF_CONS_FLOW) { + tmout = 1000000; + while (--tmout && + ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) + udelay(1); + } +} + +static void serial_hsu_console_putchar(struct uart_port *port, int ch) +{ + struct uart_hsu_port *up = + container_of(port, struct uart_hsu_port, port); + + wait_for_xmitr(up); + serial_out(up, UART_TX, ch); +} + +/* + * Print a string to the serial port trying not to disturb + * any possible real use of the port... + * + * The console_lock must be held when we get here. + */ +static void +serial_hsu_console_write(struct console *co, const char *s, unsigned int count) +{ + struct uart_hsu_port *up = serial_hsu_ports[co->index]; + unsigned long flags; + unsigned int ier; + int locked = 1; + + local_irq_save(flags); + if (up->port.sysrq) + locked = 0; + else if (oops_in_progress) { + locked = spin_trylock(&up->port.lock); + } else + spin_lock(&up->port.lock); + + /* First save the IER then disable the interrupts */ + ier = serial_in(up, UART_IER); + serial_out(up, UART_IER, 0); + + uart_console_write(&up->port, s, count, serial_hsu_console_putchar); + + /* + * Finally, wait for transmitter to become empty + * and restore the IER + */ + wait_for_xmitr(up); + serial_out(up, UART_IER, ier); + + if (locked) + spin_unlock(&up->port.lock); + local_irq_restore(flags); +} + +static struct console serial_hsu_console; + +static int __init +serial_hsu_console_setup(struct console *co, char *options) +{ + struct uart_hsu_port *up; + int baud = 115200; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + int ret; + + if (co->index == -1 || co->index >= serial_hsu_reg.nr) + co->index = 0; + up = serial_hsu_ports[co->index]; + if (!up) + return -ENODEV; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + ret = uart_set_options(&up->port, co, baud, parity, bits, flow); + + return ret; +} + +static struct console serial_hsu_console = { + .name = "ttyMFD", + .write = serial_hsu_console_write, + .device = uart_console_device, + .setup = serial_hsu_console_setup, + .flags = CON_PRINTBUFFER, + .index = 2, + .data = &serial_hsu_reg, +}; +#endif + +struct uart_ops serial_hsu_pops = { + .tx_empty = serial_hsu_tx_empty, + .set_mctrl = serial_hsu_set_mctrl, + .get_mctrl = serial_hsu_get_mctrl, + .stop_tx = serial_hsu_stop_tx, + .start_tx = serial_hsu_start_tx, + .stop_rx = serial_hsu_stop_rx, + .enable_ms = serial_hsu_enable_ms, + .break_ctl = serial_hsu_break_ctl, + .startup = serial_hsu_startup, + .shutdown = serial_hsu_shutdown, + .set_termios = serial_hsu_set_termios, + .pm = serial_hsu_pm, + .type = serial_hsu_type, + .release_port = serial_hsu_release_port, + .request_port = serial_hsu_request_port, + .config_port = serial_hsu_config_port, + .verify_port = serial_hsu_verify_port, +}; + +static struct uart_driver serial_hsu_reg = { + .owner = THIS_MODULE, + .driver_name = "MFD serial", + .dev_name = "ttyMFD", + .major = TTY_MAJOR, + .minor = 128, + .nr = 3, +}; + +#ifdef CONFIG_PM +static int serial_hsu_suspend(struct pci_dev *pdev, pm_message_t state) +{ + void *priv = pci_get_drvdata(pdev); + struct uart_hsu_port *up; + + /* Make sure this is not the internal dma controller */ + if (priv && (pdev->device != 0x081E)) { + up = priv; + uart_suspend_port(&serial_hsu_reg, &up->port); + } + + pci_save_state(pdev); + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + return 0; +} + +static int serial_hsu_resume(struct pci_dev *pdev) +{ + void *priv = pci_get_drvdata(pdev); + struct uart_hsu_port *up; + int ret; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + + ret = pci_enable_device(pdev); + if (ret) + dev_warn(&pdev->dev, + "HSU: can't re-enable device, try to continue\n"); + + if (priv && (pdev->device != 0x081E)) { + up = priv; + uart_resume_port(&serial_hsu_reg, &up->port); + } + return 0; +} +#else +#define serial_hsu_suspend NULL +#define serial_hsu_resume NULL +#endif + +/* temp global pointer before we settle down on using one or four PCI dev */ +static struct hsu_port *phsu; + +static int serial_hsu_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct uart_hsu_port *uport; + int index, ret; + + printk(KERN_INFO "HSU: found PCI Serial controller(ID: %04x:%04x)\n", + pdev->vendor, pdev->device); + + switch (pdev->device) { + case 0x081B: + index = 0; + break; + case 0x081C: + index = 1; + break; + case 0x081D: + index = 2; + break; + case 0x081E: + /* internal DMA controller */ + index = 3; + break; + default: + dev_err(&pdev->dev, "HSU: out of index!"); + return -ENODEV; + } + + ret = pci_enable_device(pdev); + if (ret) + return ret; + + if (index == 3) { + /* DMA controller */ + ret = request_irq(pdev->irq, dma_irq, 0, "hsu_dma", phsu); + if (ret) { + dev_err(&pdev->dev, "can not get IRQ\n"); + goto err_disable; + } + pci_set_drvdata(pdev, phsu); + } else { + /* UART port 0~2 */ + uport = &phsu->port[index]; + uport->port.irq = pdev->irq; + uport->port.dev = &pdev->dev; + uport->dev = &pdev->dev; + + ret = request_irq(pdev->irq, port_irq, 0, uport->name, uport); + if (ret) { + dev_err(&pdev->dev, "can not get IRQ\n"); + goto err_disable; + } + uart_add_one_port(&serial_hsu_reg, &uport->port); + +#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE + if (index == 2) { + register_console(&serial_hsu_console); + uport->port.cons = &serial_hsu_console; + } +#endif + pci_set_drvdata(pdev, uport); + } + + return 0; + +err_disable: + pci_disable_device(pdev); + return ret; +} + +static void hsu_dma_rx_timeout(unsigned long data) +{ + struct hsu_dma_chan *chan = (void *)data; + struct uart_hsu_port *up = chan->uport; + struct hsu_dma_buffer *dbuf = &up->rxbuf; + int count = 0; + unsigned long flags; + + spin_lock_irqsave(&up->port.lock, flags); + + count = chan_readl(chan, HSU_CH_D0SAR) - dbuf->dma_addr; + + if (!count) { + mod_timer(&chan->rx_timer, jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ); + goto exit; + } + + hsu_dma_rx(up, 0); +exit: + spin_unlock_irqrestore(&up->port.lock, flags); +} + +static void hsu_global_init(void) +{ + struct hsu_port *hsu; + struct uart_hsu_port *uport; + struct hsu_dma_chan *dchan; + int i, ret; + + hsu = kzalloc(sizeof(struct hsu_port), GFP_KERNEL); + if (!hsu) + return; + + /* Get basic io resource and map it */ + hsu->paddr = 0xffa28000; + hsu->iolen = 0x1000; + + if (!(request_mem_region(hsu->paddr, hsu->iolen, "HSU global"))) + pr_warning("HSU: error in request mem region\n"); + + hsu->reg = ioremap_nocache((unsigned long)hsu->paddr, hsu->iolen); + if (!hsu->reg) { + pr_err("HSU: error in ioremap\n"); + ret = -ENOMEM; + goto err_free_region; + } + + /* Initialise the 3 UART ports */ + uport = hsu->port; + for (i = 0; i < 3; i++) { + uport->port.type = PORT_MFD; + uport->port.iotype = UPIO_MEM; + uport->port.mapbase = (resource_size_t)hsu->paddr + + HSU_PORT_REG_OFFSET + + i * HSU_PORT_REG_LENGTH; + uport->port.membase = hsu->reg + HSU_PORT_REG_OFFSET + + i * HSU_PORT_REG_LENGTH; + + sprintf(uport->name, "hsu_port%d", i); + uport->port.fifosize = 64; + uport->port.ops = &serial_hsu_pops; + uport->port.line = i; + uport->port.flags = UPF_IOREMAP; + /* set the scalable maxim support rate to 2746800 bps */ + uport->port.uartclk = 115200 * 24 * 16; + + uport->running = 0; + uport->txc = &hsu->chans[i * 2]; + uport->rxc = &hsu->chans[i * 2 + 1]; + + serial_hsu_ports[i] = uport; + uport->index = i; + uport++; + } + + /* Initialise 6 dma channels */ + dchan = hsu->chans; + for (i = 0; i < 6; i++) { + dchan->id = i; + dchan->dirt = (i & 0x1) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; + dchan->uport = &hsu->port[i/2]; + dchan->reg = hsu->reg + HSU_DMA_CHANS_REG_OFFSET + + i * HSU_DMA_CHANS_REG_LENGTH; + + /* Work around for RX */ + if (dchan->dirt == DMA_FROM_DEVICE) { + init_timer(&dchan->rx_timer); + dchan->rx_timer.function = hsu_dma_rx_timeout; + dchan->rx_timer.data = (unsigned long)dchan; + } + dchan++; + } + + phsu = hsu; + + hsu_debugfs_init(hsu); + return; + +err_free_region: + release_mem_region(hsu->paddr, hsu->iolen); + kfree(hsu); + return; +} + +static void serial_hsu_remove(struct pci_dev *pdev) +{ + struct hsu_port *hsu; + int i; + + hsu = pci_get_drvdata(pdev); + if (!hsu) + return; + + for (i = 0; i < 3; i++) + uart_remove_one_port(&serial_hsu_reg, &hsu->port[i].port); + + pci_set_drvdata(pdev, NULL); + free_irq(hsu->irq, hsu); + pci_disable_device(pdev); +} + +/* First 3 are UART ports, and the 4th is the DMA */ +static const struct pci_device_id pci_ids[] __devinitdata = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081B) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081C) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081D) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081E) }, + {}, +}; + +static struct pci_driver hsu_pci_driver = { + .name = "HSU serial", + .id_table = pci_ids, + .probe = serial_hsu_probe, + .remove = __devexit_p(serial_hsu_remove), + .suspend = serial_hsu_suspend, + .resume = serial_hsu_resume, +}; + +static int __init hsu_pci_init(void) +{ + int ret; + + hsu_global_init(); + + ret = uart_register_driver(&serial_hsu_reg); + if (ret) + return ret; + + return pci_register_driver(&hsu_pci_driver); +} + +static void __exit hsu_pci_exit(void) +{ + pci_unregister_driver(&hsu_pci_driver); + uart_unregister_driver(&serial_hsu_reg); + + hsu_debugfs_remove(phsu); + + kfree(phsu); +} + +module_init(hsu_pci_init); +module_exit(hsu_pci_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:medfield-hsu"); diff --git a/drivers/serial/mrst_max3110.c b/drivers/serial/mrst_max3110.c new file mode 100644 index 000000000000..f6ad1ecbff79 --- /dev/null +++ b/drivers/serial/mrst_max3110.c @@ -0,0 +1,844 @@ +/* + * max3110.c - spi uart protocol driver for Maxim 3110 on Moorestown + * + * Copyright (C) Intel 2008 Feng Tang <feng.tang@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * Note: + * 1. From Max3110 spec, the Rx FIFO has 8 words, while the Tx FIFO only has + * 1 word. If SPI master controller doesn't support sclk frequency change, + * then the char need be sent out one by one with some delay + * + * 2. Currently only RX availabe interrrupt is used, no need for waiting TXE + * interrupt for a low speed UART device + */ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/platform_device.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial_core.h> +#include <linux/serial_reg.h> + +#include <linux/kthread.h> +#include <linux/delay.h> +#include <asm/atomic.h> +#include <linux/spi/spi.h> +#include <linux/spi/dw_spi.h> + +#include "mrst_max3110.h" + +#define PR_FMT "mrst_max3110: " + +#define UART_TX_NEEDED 1 +#define CON_TX_NEEDED 2 +#define BIT_IRQ_PENDING 3 + +struct uart_max3110 { + struct uart_port port; + struct spi_device *spi; + char *name; + + wait_queue_head_t wq; + struct task_struct *main_thread; + struct task_struct *read_thread; + struct mutex thread_mutex;; + + u32 baud; + u16 cur_conf; + u8 clock; + u8 parity, word_7bits; + + unsigned long uart_flags; + + /* console related */ + struct circ_buf con_xmit; + + /* irq related */ + u16 irq; +}; + +/* global data structure, may need be removed */ +struct uart_max3110 *pmax; +static inline void receive_char(struct uart_max3110 *max, u8 ch); +static void receive_chars(struct uart_max3110 *max, + unsigned char *str, int len); +static int max3110_read_multi(struct uart_max3110 *max, int len, u8 *buf); +static void max3110_console_receive(struct uart_max3110 *max); + +int max3110_write_then_read(struct uart_max3110 *max, + const u8 *txbuf, u8 *rxbuf, unsigned len, int always_fast) +{ + struct spi_device *spi = max->spi; + struct spi_message message; + struct spi_transfer x; + int ret; + + if (!txbuf || !rxbuf) + return -EINVAL; + + spi_message_init(&message); + memset(&x, 0, sizeof x); + x.len = len; + x.tx_buf = txbuf; + x.rx_buf = rxbuf; + spi_message_add_tail(&x, &message); + + if (always_fast) + x.speed_hz = 3125000; + else if (max->baud) + x.speed_hz = max->baud; + + /* Do the i/o */ + ret = spi_sync(spi, &message); + return ret; +} + +/* Write a u16 to the device, and return one u16 read back */ +int max3110_out(struct uart_max3110 *max, const u16 out) +{ + u16 tmp; + int ret; + + ret = max3110_write_then_read(max, (u8 *)&out, (u8 *)&tmp, 2, 1); + if (ret) + return ret; + + /* If some valid data is read back */ + if (tmp & MAX3110_READ_DATA_AVAILABLE) + receive_char(max, (tmp & 0xff)); + + return ret; +} + +#define MAX_READ_LEN 20 +/* + * This is usually used to read data from SPIC RX FIFO, which doesn't + * need any delay like flushing character out. It returns how many + * valide bytes are read back + */ +static int max3110_read_multi(struct uart_max3110 *max, int len, u8 *buf) +{ + u16 out[MAX_READ_LEN], in[MAX_READ_LEN]; + u8 *pbuf, valid_str[MAX_READ_LEN]; + int i, j, bytelen; + + if (len > MAX_READ_LEN) { + pr_err(PR_FMT "read len %d is too large\n", len); + return 0; + } + + bytelen = len * 2; + memset(out, 0, bytelen); + memset(in, 0, bytelen); + + if (max3110_write_then_read(max, (u8 *)out, (u8 *)in, bytelen, 1)) + return 0; + + /* If caller don't provide a buffer, then handle received char */ + pbuf = buf ? buf : valid_str; + + for (i = 0, j = 0; i < len; i++) { + if (in[i] & MAX3110_READ_DATA_AVAILABLE) + pbuf[j++] = (u8)(in[i] & 0xff); + } + + if (j && (pbuf == valid_str)) + receive_chars(max, valid_str, j); + + return j; +} + +static void serial_m3110_con_putchar(struct uart_port *port, int ch) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + struct circ_buf *xmit = &max->con_xmit; + + if (uart_circ_chars_free(xmit)) { + xmit->buf[xmit->head] = (char)ch; + xmit->head = (xmit->head + 1) & (PAGE_SIZE - 1); + } + + + if (!test_and_set_bit(CON_TX_NEEDED, &max->uart_flags)) + wake_up_process(max->main_thread); +} + +/* + * Print a string to the serial port trying not to disturb + * any possible real use of the port... + * + * The console_lock must be held when we get here. + */ +static void serial_m3110_con_write(struct console *co, + const char *s, unsigned int count) +{ + if (!pmax) + return; + + uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar); +} + +static int __init +serial_m3110_con_setup(struct console *co, char *options) +{ + struct uart_max3110 *max = pmax; + int baud = 115200; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + pr_info(PR_FMT "setting up console\n"); + + if (!max) { + pr_err(PR_FMT "pmax is NULL, return"); + return -ENODEV; + } + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(&max->port, co, baud, parity, bits, flow); +} + +static struct tty_driver *serial_m3110_con_device(struct console *co, + int *index) +{ + struct uart_driver *p = co->data; + *index = co->index; + return p->tty_driver; +} + +static struct uart_driver serial_m3110_reg; +static struct console serial_m3110_console = { + .name = "ttyS", + .write = serial_m3110_con_write, + .device = serial_m3110_con_device, + .setup = serial_m3110_con_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &serial_m3110_reg, +}; + +#define MRST_CONSOLE (&serial_m3110_console) + +static unsigned int serial_m3110_tx_empty(struct uart_port *port) +{ + return 1; +} + +static void serial_m3110_stop_tx(struct uart_port *port) +{ + return; +} + +/* stop_rx will be called in spin_lock env */ +static void serial_m3110_stop_rx(struct uart_port *port) +{ + return; +} + +#define WORDS_PER_XFER 128 +static inline void send_circ_buf(struct uart_max3110 *max, + struct circ_buf *xmit) +{ + int len, left = 0; + u16 obuf[WORDS_PER_XFER], ibuf[WORDS_PER_XFER]; + u8 valid_str[WORDS_PER_XFER]; + int i, j; + + while (!uart_circ_empty(xmit)) { + left = uart_circ_chars_pending(xmit); + while (left) { + len = (left >= WORDS_PER_XFER) ? WORDS_PER_XFER : left; + + memset(obuf, 0, len * 2); + memset(ibuf, 0, len * 2); + for (i = 0; i < len; i++) { + obuf[i] = (u8)xmit->buf[xmit->tail] | WD_TAG; + xmit->tail = (xmit->tail + 1) & + (UART_XMIT_SIZE - 1); + } + max3110_write_then_read(max, (u8 *)obuf, + (u8 *)ibuf, len * 2, 0); + + for (i = 0, j = 0; i < len; i++) { + if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE) + valid_str[j++] = (u8)(ibuf[i] & 0xff); + } + + if (j) + receive_chars(max, valid_str, j); + + max->port.icount.tx += len; + left -= len; + } + } +} + +static void transmit_char(struct uart_max3110 *max) +{ + struct uart_port *port = &max->port; + struct circ_buf *xmit = &port->state->xmit; + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) + return; + + send_circ_buf(max, xmit); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (uart_circ_empty(xmit)) + serial_m3110_stop_tx(port); +} + +/* This will be called by uart_write() and tty_write, can't + * go to sleep */ +static void serial_m3110_start_tx(struct uart_port *port) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + + if (!test_and_set_bit(UART_TX_NEEDED, &max->uart_flags)) + wake_up_process(max->main_thread); +} + +static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len) +{ + struct uart_port *port = &max->port; + struct tty_struct *tty; + int usable; + + /* If uart is not opened, just return */ + if (!port->state) + return; + + tty = port->state->port.tty; + if (!tty) + return; /* receive some char before the tty is opened */ + + while (len) { + usable = tty_buffer_request_room(tty, len); + if (usable) { + tty_insert_flip_string(tty, str, usable); + str += usable; + port->icount.rx += usable; + tty_flip_buffer_push(tty); + } + len -= usable; + } +} + +static inline void receive_char(struct uart_max3110 *max, u8 ch) +{ + receive_chars(max, &ch, 1); +} + +static void max3110_console_receive(struct uart_max3110 *max) +{ + int loop = 1, num, total = 0; + u8 recv_buf[512], *pbuf; + + pbuf = recv_buf; + do { + num = max3110_read_multi(max, 8, pbuf); + + if (num) { + loop = 10; + pbuf += num; + total += num; + + if (total >= 500) { + receive_chars(max, recv_buf, total); + pbuf = recv_buf; + total = 0; + } + } + } while (--loop); + + if (total) + receive_chars(max, recv_buf, total); +} + +static int max3110_main_thread(void *_max) +{ + struct uart_max3110 *max = _max; + wait_queue_head_t *wq = &max->wq; + int ret = 0; + struct circ_buf *xmit = &max->con_xmit; + + init_waitqueue_head(wq); + pr_info(PR_FMT "start main thread\n"); + + do { + wait_event_interruptible(*wq, max->uart_flags || kthread_should_stop()); + + mutex_lock(&max->thread_mutex); + + if (test_and_clear_bit(BIT_IRQ_PENDING, &max->uart_flags)) + max3110_console_receive(max); + + /* first handle console output */ + if (test_and_clear_bit(CON_TX_NEEDED, &max->uart_flags)) + send_circ_buf(max, xmit); + + /* handle uart output */ + if (test_and_clear_bit(UART_TX_NEEDED, &max->uart_flags)) + transmit_char(max); + + mutex_unlock(&max->thread_mutex); + + } while (!kthread_should_stop()); + + return ret; +} + +#ifdef CONFIG_MRST_MAX3110_IRQ +static irqreturn_t serial_m3110_irq(int irq, void *dev_id) +{ + struct uart_max3110 *max = dev_id; + + /* max3110's irq is a falling edge, not level triggered, + * so no need to disable the irq */ + if (!test_and_set_bit(BIT_IRQ_PENDING, &max->uart_flags)) + wake_up_process(max->main_thread); + + return IRQ_HANDLED; +} +#else +/* if don't use RX IRQ, then need a thread to polling read */ +static int max3110_read_thread(void *_max) +{ + struct uart_max3110 *max = _max; + + pr_info(PR_FMT "start read thread\n"); + do { + mutex_lock(&max->thread_mutex); + max3110_console_receive(max); + mutex_unlock(&max->thread_mutex); + + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(HZ / 20); + } while (!kthread_should_stop()); + + return 0; +} +#endif + +static int serial_m3110_startup(struct uart_port *port) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + u16 config = 0; + int ret = 0; + + if (port->line != 0) + pr_err(PR_FMT "uart port startup failed\n"); + + /* firstly disable all IRQ and config it to 115200, 8n1 */ + config = WC_TAG | WC_FIFO_ENABLE + | WC_1_STOPBITS + | WC_8BIT_WORD + | WC_BAUD_DR2; + ret = max3110_out(max, config); + + /* as we use thread to handle tx/rx, need set low latency */ + port->state->port.tty->low_latency = 1; + +#ifdef CONFIG_MRST_MAX3110_IRQ + ret = request_irq(max->irq, serial_m3110_irq, + IRQ_TYPE_EDGE_FALLING, "max3110", max); + if (ret) + return ret; + + /* enable RX IRQ only */ + config |= WC_RXA_IRQ_ENABLE; + max3110_out(max, config); +#else + /* if IRQ is disabled, start a read thread for input data */ + max->read_thread = + kthread_run(max3110_read_thread, max, "max3110_read"); +#endif + + max->cur_conf = config; + return 0; +} + +static void serial_m3110_shutdown(struct uart_port *port) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + u16 config; + + if (max->read_thread) { + kthread_stop(max->read_thread); + max->read_thread = NULL; + } + +#ifdef CONFIG_MRST_MAX3110_IRQ + free_irq(max->irq, max); +#endif + + /* Disable interrupts from this port */ + config = WC_TAG | WC_SW_SHDI; + max3110_out(max, config); +} + +static void serial_m3110_release_port(struct uart_port *port) +{ +} + +static int serial_m3110_request_port(struct uart_port *port) +{ + return 0; +} + +static void serial_m3110_config_port(struct uart_port *port, int flags) +{ + /* give it fake type */ + port->type = PORT_PXA; +} + +static int +serial_m3110_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + /* we don't want the core code to modify any port params */ + return -EINVAL; +} + + +static const char *serial_m3110_type(struct uart_port *port) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + return max->name; +} + +static void +serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + struct uart_max3110 *max = + container_of(port, struct uart_max3110, port); + unsigned char cval; + unsigned int baud, parity = 0; + int clk_div = -1; + u16 new_conf = max->cur_conf; + + switch (termios->c_cflag & CSIZE) { + case CS7: + cval = UART_LCR_WLEN7; + new_conf |= WC_7BIT_WORD; + break; + default: + case CS8: + cval = UART_LCR_WLEN8; + new_conf |= WC_8BIT_WORD; + break; + } + + baud = uart_get_baud_rate(port, termios, old, 0, 230400); + + /* first calc the div for 1.8MHZ clock case */ + switch (baud) { + case 300: + clk_div = WC_BAUD_DR384; + break; + case 600: + clk_div = WC_BAUD_DR192; + break; + case 1200: + clk_div = WC_BAUD_DR96; + break; + case 2400: + clk_div = WC_BAUD_DR48; + break; + case 4800: + clk_div = WC_BAUD_DR24; + break; + case 9600: + clk_div = WC_BAUD_DR12; + break; + case 19200: + clk_div = WC_BAUD_DR6; + break; + case 38400: + clk_div = WC_BAUD_DR3; + break; + case 57600: + clk_div = WC_BAUD_DR2; + break; + case 115200: + clk_div = WC_BAUD_DR1; + break; + case 230400: + if (max->clock & MAX3110_HIGH_CLK) + break; + default: + /* pick the previous baud rate */ + baud = max->baud; + clk_div = max->cur_conf & WC_BAUD_DIV_MASK; + tty_termios_encode_baud_rate(termios, baud, baud); + } + + if (max->clock & MAX3110_HIGH_CLK) { + clk_div += 1; + /* high clk version max3110 doesn't support B300 */ + if (baud == 300) + baud = 600; + if (baud == 230400) + clk_div = WC_BAUD_DR1; + tty_termios_encode_baud_rate(termios, baud, baud); + } + + new_conf = (new_conf & ~WC_BAUD_DIV_MASK) | clk_div; + if (termios->c_cflag & CSTOPB) + new_conf |= WC_2_STOPBITS; + else + new_conf &= ~WC_2_STOPBITS; + + if (termios->c_cflag & PARENB) { + new_conf |= WC_PARITY_ENABLE; + parity |= UART_LCR_PARITY; + } else + new_conf &= ~WC_PARITY_ENABLE; + + if (!(termios->c_cflag & PARODD)) + parity |= UART_LCR_EPAR; + max->parity = parity; + + uart_update_timeout(port, termios->c_cflag, baud); + + new_conf |= WC_TAG; + if (new_conf != max->cur_conf) { + max3110_out(max, new_conf); + max->cur_conf = new_conf; + max->baud = baud; + } +} + +/* don't handle hw handshaking */ +static unsigned int serial_m3110_get_mctrl(struct uart_port *port) +{ + return TIOCM_DSR | TIOCM_CAR | TIOCM_DSR; +} + +static void serial_m3110_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ +} + +static void serial_m3110_break_ctl(struct uart_port *port, int break_state) +{ +} + +static void serial_m3110_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ +} + +static void serial_m3110_enable_ms(struct uart_port *port) +{ +} + +struct uart_ops serial_m3110_ops = { + .tx_empty = serial_m3110_tx_empty, + .set_mctrl = serial_m3110_set_mctrl, + .get_mctrl = serial_m3110_get_mctrl, + .stop_tx = serial_m3110_stop_tx, + .start_tx = serial_m3110_start_tx, + .stop_rx = serial_m3110_stop_rx, + .enable_ms = serial_m3110_enable_ms, + .break_ctl = serial_m3110_break_ctl, + .startup = serial_m3110_startup, + .shutdown = serial_m3110_shutdown, + .set_termios = serial_m3110_set_termios, /* must have */ + .pm = serial_m3110_pm, + .type = serial_m3110_type, + .release_port = serial_m3110_release_port, + .request_port = serial_m3110_request_port, + .config_port = serial_m3110_config_port, + .verify_port = serial_m3110_verify_port, +}; + +static struct uart_driver serial_m3110_reg = { + .owner = THIS_MODULE, + .driver_name = "MRST serial", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, + .nr = 1, + .cons = MRST_CONSOLE, +}; + +static int serial_m3110_suspend(struct spi_device *spi, pm_message_t state) +{ + return 0; +} + +static int serial_m3110_resume(struct spi_device *spi) +{ + return 0; +} + +static struct dw_spi_chip spi0_uart = { + .poll_mode = 1, + .enable_dma = 0, + .type = SPI_FRF_SPI, +}; + +static int serial_m3110_probe(struct spi_device *spi) +{ + struct uart_max3110 *max; + int ret; + unsigned char *buffer; + u16 res; + max = kzalloc(sizeof(*max), GFP_KERNEL); + if (!max) + return -ENOMEM; + + /* set spi info */ + spi->mode = SPI_MODE_0; + spi->bits_per_word = 16; + max->clock = MAX3110_HIGH_CLK; + spi->controller_data = &spi0_uart; + + spi_setup(spi); + + max->port.type = PORT_PXA; /* need apply for a max3110 type */ + max->port.fifosize = 2; /* only have 16b buffer */ + max->port.ops = &serial_m3110_ops; + max->port.line = 0; + max->port.dev = &spi->dev; + max->port.uartclk = 115200; + + max->spi = spi; + max->name = spi->modalias; /* use spi name as the name */ + max->irq = (u16)spi->irq; + + mutex_init(&max->thread_mutex); + + max->word_7bits = 0; + max->parity = 0; + max->baud = 0; + + max->cur_conf = 0; + max->uart_flags = 0; + + /* Check if reading configuration register returns something sane */ + + res = RC_TAG; + ret = max3110_write_then_read(max, (u8 *)&res, (u8 *)&res, 2, 0); + if (ret < 0 || res == 0 || res == 0xffff) { + printk(KERN_ERR "MAX3111 deemed not present (conf reg %04x)", + res); + ret = -ENODEV; + goto err_get_page; + } + buffer = (unsigned char *)__get_free_page(GFP_KERNEL); + if (!buffer) { + ret = -ENOMEM; + goto err_get_page; + } + max->con_xmit.buf = (unsigned char *)buffer; + max->con_xmit.head = max->con_xmit.tail = 0; + + max->main_thread = kthread_run(max3110_main_thread, + max, "max3110_main"); + if (IS_ERR(max->main_thread)) { + ret = PTR_ERR(max->main_thread); + goto err_kthread; + } + + pmax = max; + /* give membase a psudo value to pass serial_core's check */ + max->port.membase = (void *)0xff110000; + uart_add_one_port(&serial_m3110_reg, &max->port); + + return 0; + +err_kthread: + free_page((unsigned long)buffer); +err_get_page: + pmax = NULL; + kfree(max); + return ret; +} + +static int max3110_remove(struct spi_device *dev) +{ + struct uart_max3110 *max = pmax; + + if (!pmax) + return 0; + + pmax = NULL; + uart_remove_one_port(&serial_m3110_reg, &max->port); + + free_page((unsigned long)max->con_xmit.buf); + + if (max->main_thread) + kthread_stop(max->main_thread); + + kfree(max); + return 0; +} + +static struct spi_driver uart_max3110_driver = { + .driver = { + .name = "spi_max3111", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = serial_m3110_probe, + .remove = __devexit_p(max3110_remove), + .suspend = serial_m3110_suspend, + .resume = serial_m3110_resume, +}; + + +int __init serial_m3110_init(void) +{ + int ret = 0; + + ret = uart_register_driver(&serial_m3110_reg); + if (ret) + return ret; + + ret = spi_register_driver(&uart_max3110_driver); + if (ret) + uart_unregister_driver(&serial_m3110_reg); + + return ret; +} + +void __exit serial_m3110_exit(void) +{ + spi_unregister_driver(&uart_max3110_driver); + uart_unregister_driver(&serial_m3110_reg); +} + +module_init(serial_m3110_init); +module_exit(serial_m3110_exit); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("max3110-uart"); diff --git a/drivers/serial/mrst_max3110.h b/drivers/serial/mrst_max3110.h new file mode 100644 index 000000000000..363478acb2c3 --- /dev/null +++ b/drivers/serial/mrst_max3110.h @@ -0,0 +1,59 @@ +#ifndef _MRST_MAX3110_H +#define _MRST_MAX3110_H + +#define MAX3110_HIGH_CLK 0x1 /* 3.6864 MHZ */ +#define MAX3110_LOW_CLK 0x0 /* 1.8432 MHZ */ + +/* status bits for all 4 MAX3110 operate modes */ +#define MAX3110_READ_DATA_AVAILABLE (1 << 15) +#define MAX3110_WRITE_BUF_EMPTY (1 << 14) + +#define WC_TAG (3 << 14) +#define RC_TAG (1 << 14) +#define WD_TAG (2 << 14) +#define RD_TAG (0 << 14) + +/* bits def for write configuration */ +#define WC_FIFO_ENABLE_MASK (1 << 13) +#define WC_FIFO_ENABLE (0 << 13) + +#define WC_SW_SHDI (1 << 12) + +#define WC_IRQ_MASK (0xF << 8) +#define WC_TXE_IRQ_ENABLE (1 << 11) /* TX empty irq */ +#define WC_RXA_IRQ_ENABLE (1 << 10) /* RX availabe irq */ +#define WC_PAR_HIGH_IRQ_ENABLE (1 << 9) +#define WC_REC_ACT_IRQ_ENABLE (1 << 8) + +#define WC_IRDA_ENABLE (1 << 7) + +#define WC_STOPBITS_MASK (1 << 6) +#define WC_2_STOPBITS (1 << 6) +#define WC_1_STOPBITS (0 << 6) + +#define WC_PARITY_ENABLE_MASK (1 << 5) +#define WC_PARITY_ENABLE (1 << 5) + +#define WC_WORDLEN_MASK (1 << 4) +#define WC_7BIT_WORD (1 << 4) +#define WC_8BIT_WORD (0 << 4) + +#define WC_BAUD_DIV_MASK (0xF) +#define WC_BAUD_DR1 (0x0) +#define WC_BAUD_DR2 (0x1) +#define WC_BAUD_DR4 (0x2) +#define WC_BAUD_DR8 (0x3) +#define WC_BAUD_DR16 (0x4) +#define WC_BAUD_DR32 (0x5) +#define WC_BAUD_DR64 (0x6) +#define WC_BAUD_DR128 (0x7) +#define WC_BAUD_DR3 (0x8) +#define WC_BAUD_DR6 (0x9) +#define WC_BAUD_DR12 (0xA) +#define WC_BAUD_DR24 (0xB) +#define WC_BAUD_DR48 (0xC) +#define WC_BAUD_DR96 (0xD) +#define WC_BAUD_DR192 (0xE) +#define WC_BAUD_DR384 (0xF) + +#endif diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 7f2830709512..cd8511298bcb 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -58,9 +58,9 @@ static struct lock_class_key port_lock_key; #define uart_console(port) (0) #endif -static void uart_change_speed(struct uart_state *state, +static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, struct ktermios *old_termios); -static void uart_wait_until_sent(struct tty_struct *tty, int timeout); +static void __uart_wait_until_sent(struct uart_port *port, int timeout); static void uart_change_pm(struct uart_state *state, int pm_state); /* @@ -137,7 +137,7 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear) * Startup the port. This will be called once per open. All calls * will be serialised by the per-port mutex. */ -static int uart_startup(struct uart_state *state, int init_hw) +static int uart_startup(struct tty_struct *tty, struct uart_state *state, int init_hw) { struct uart_port *uport = state->uart_port; struct tty_port *port = &state->port; @@ -152,7 +152,7 @@ static int uart_startup(struct uart_state *state, int init_hw) * once we have successfully opened the port. Also set * up the tty->alt_speed kludge */ - set_bit(TTY_IO_ERROR, &port->tty->flags); + set_bit(TTY_IO_ERROR, &tty->flags); if (uport->type == PORT_UNKNOWN) return 0; @@ -177,26 +177,26 @@ static int uart_startup(struct uart_state *state, int init_hw) /* * Initialise the hardware port settings. */ - uart_change_speed(state, NULL); + uart_change_speed(tty, state, NULL); /* * Setup the RTS and DTR signals once the * port is open and ready to respond. */ - if (port->tty->termios->c_cflag & CBAUD) + if (tty->termios->c_cflag & CBAUD) uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR); } if (port->flags & ASYNC_CTS_FLOW) { spin_lock_irq(&uport->lock); if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS)) - port->tty->hw_stopped = 1; + tty->hw_stopped = 1; spin_unlock_irq(&uport->lock); } set_bit(ASYNCB_INITIALIZED, &port->flags); - clear_bit(TTY_IO_ERROR, &port->tty->flags); + clear_bit(TTY_IO_ERROR, &tty->flags); } if (retval && capable(CAP_SYS_ADMIN)) @@ -210,11 +210,10 @@ static int uart_startup(struct uart_state *state, int init_hw) * DTR is dropped if the hangup on close termio flag is on. Calls to * uart_shutdown are serialised by the per-port semaphore. */ -static void uart_shutdown(struct uart_state *state) +static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) { struct uart_port *uport = state->uart_port; struct tty_port *port = &state->port; - struct tty_struct *tty = port->tty; /* * Set the TTY IO error marker @@ -430,11 +429,10 @@ uart_get_divisor(struct uart_port *port, unsigned int baud) EXPORT_SYMBOL(uart_get_divisor); /* FIXME: Consistent locking policy */ -static void -uart_change_speed(struct uart_state *state, struct ktermios *old_termios) +static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, + struct ktermios *old_termios) { struct tty_port *port = &state->port; - struct tty_struct *tty = port->tty; struct uart_port *uport = state->uart_port; struct ktermios *termios; @@ -463,8 +461,8 @@ uart_change_speed(struct uart_state *state, struct ktermios *old_termios) uport->ops->set_termios(uport, termios, old_termios); } -static inline int -__uart_put_char(struct uart_port *port, struct circ_buf *circ, unsigned char c) +static inline int __uart_put_char(struct uart_port *port, + struct circ_buf *circ, unsigned char c) { unsigned long flags; int ret = 0; @@ -494,8 +492,8 @@ static void uart_flush_chars(struct tty_struct *tty) uart_start(tty); } -static int -uart_write(struct tty_struct *tty, const unsigned char *buf, int count) +static int uart_write(struct tty_struct *tty, + const unsigned char *buf, int count) { struct uart_state *state = tty->driver_data; struct uart_port *port; @@ -675,7 +673,7 @@ static int uart_get_info(struct uart_state *state, return 0; } -static int uart_set_info(struct uart_state *state, +static int uart_set_info(struct tty_struct *tty, struct uart_state *state, struct serial_struct __user *newinfo) { struct serial_struct new_serial; @@ -770,7 +768,7 @@ static int uart_set_info(struct uart_state *state, * We need to shutdown the serial port at the old * port/type/irq combination. */ - uart_shutdown(state); + uart_shutdown(tty, state); } if (change_port) { @@ -869,25 +867,27 @@ static int uart_set_info(struct uart_state *state, "is deprecated.\n", current->comm, tty_name(port->tty, buf)); } - uart_change_speed(state, NULL); + uart_change_speed(tty, state, NULL); } } else - retval = uart_startup(state, 1); + retval = uart_startup(tty, state, 1); exit: mutex_unlock(&port->mutex); return retval; } - -/* - * uart_get_lsr_info - get line status register info. - * Note: uart_ioctl protects us against hangups. +/** + * uart_get_lsr_info - get line status register info + * @tty: tty associated with the UART + * @state: UART being queried + * @value: returned modem value + * + * Note: uart_ioctl protects us against hangups. */ -static int uart_get_lsr_info(struct uart_state *state, - unsigned int __user *value) +static int uart_get_lsr_info(struct tty_struct *tty, + struct uart_state *state, unsigned int __user *value) { struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; unsigned int result; result = uport->ops->tx_empty(uport); @@ -900,7 +900,7 @@ static int uart_get_lsr_info(struct uart_state *state, */ if (uport->x_char || ((uart_circ_chars_pending(&state->xmit) > 0) && - !port->tty->stopped && !port->tty->hw_stopped)) + !tty->stopped && !tty->hw_stopped)) result &= ~TIOCSER_TEMT; return put_user(result, value); @@ -961,7 +961,7 @@ static int uart_break_ctl(struct tty_struct *tty, int break_state) return 0; } -static int uart_do_autoconfig(struct uart_state *state) +static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state) { struct uart_port *uport = state->uart_port; struct tty_port *port = &state->port; @@ -980,7 +980,7 @@ static int uart_do_autoconfig(struct uart_state *state) ret = -EBUSY; if (tty_port_users(port) == 1) { - uart_shutdown(state); + uart_shutdown(tty, state); /* * If we already have a port type configured, @@ -999,7 +999,7 @@ static int uart_do_autoconfig(struct uart_state *state) */ uport->ops->config_port(uport, flags); - ret = uart_startup(state, 1); + ret = uart_startup(tty, state, 1); } mutex_unlock(&port->mutex); return ret; @@ -1122,11 +1122,11 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, break; case TIOCSSERIAL: - ret = uart_set_info(state, uarg); + ret = uart_set_info(tty, state, uarg); break; case TIOCSERCONFIG: - ret = uart_do_autoconfig(state); + ret = uart_do_autoconfig(tty, state); break; case TIOCSERGWILD: /* obsolete */ @@ -1172,7 +1172,7 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, */ switch (cmd) { case TIOCSERGETLSR: /* Get line status register */ - ret = uart_get_lsr_info(state, uarg); + ret = uart_get_lsr_info(tty, state, uarg); break; default: { @@ -1194,7 +1194,7 @@ static void uart_set_ldisc(struct tty_struct *tty) struct uart_port *uport = state->uart_port; if (uport->ops->set_ldisc) - uport->ops->set_ldisc(uport); + uport->ops->set_ldisc(uport, tty->termios->c_line); } static void uart_set_termios(struct tty_struct *tty, @@ -1219,7 +1219,7 @@ static void uart_set_termios(struct tty_struct *tty, return; } - uart_change_speed(state, old_termios); + uart_change_speed(tty, state, old_termios); /* Handle transition to B0 status */ if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) @@ -1272,8 +1272,9 @@ static void uart_close(struct tty_struct *tty, struct file *filp) struct uart_state *state = tty->driver_data; struct tty_port *port; struct uart_port *uport; + unsigned long flags; - BUG_ON(!kernel_locked()); + BUG_ON(!tty_locked()); if (!state) return; @@ -1284,9 +1285,12 @@ static void uart_close(struct tty_struct *tty, struct file *filp) pr_debug("uart_close(%d) called\n", uport->line); mutex_lock(&port->mutex); + spin_lock_irqsave(&port->lock, flags); - if (tty_hung_up_p(filp)) + if (tty_hung_up_p(filp)) { + spin_unlock_irqrestore(&port->lock, flags); goto done; + } if ((tty->count == 1) && (port->count != 1)) { /* @@ -1305,8 +1309,10 @@ static void uart_close(struct tty_struct *tty, struct file *filp) tty->name, port->count); port->count = 0; } - if (port->count) + if (port->count) { + spin_unlock_irqrestore(&port->lock, flags); goto done; + } /* * Now we wait for the transmit buffer to clear; and we notify @@ -1314,9 +1320,18 @@ static void uart_close(struct tty_struct *tty, struct file *filp) * setting tty->closing. */ tty->closing = 1; + spin_unlock_irqrestore(&port->lock, flags); - if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent(tty, msecs_to_jiffies(port->closing_wait)); + if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { + /* + * hack: open-coded tty_wait_until_sent to avoid + * recursive tty_lock + */ + long timeout = msecs_to_jiffies(port->closing_wait); + if (wait_event_interruptible_timeout(tty->write_wait, + !tty_chars_in_buffer(tty), timeout) >= 0) + __uart_wait_until_sent(uport, timeout); + } /* * At this point, we stop accepting input. To do this, we @@ -1332,45 +1347,47 @@ static void uart_close(struct tty_struct *tty, struct file *filp) * has completely drained; this is especially * important if there is a transmit FIFO! */ - uart_wait_until_sent(tty, uport->timeout); + __uart_wait_until_sent(uport, uport->timeout); } - uart_shutdown(state); + uart_shutdown(tty, state); uart_flush_buffer(tty); tty_ldisc_flush(tty); - tty->closing = 0; tty_port_tty_set(port, NULL); + spin_lock_irqsave(&port->lock, flags); + tty->closing = 0; if (port->blocked_open) { + spin_unlock_irqrestore(&port->lock, flags); if (port->close_delay) msleep_interruptible(port->close_delay); + spin_lock_irqsave(&port->lock, flags); } else if (!uart_console(uport)) { + spin_unlock_irqrestore(&port->lock, flags); uart_change_pm(state, 3); + spin_lock_irqsave(&port->lock, flags); } /* * Wake up anyone trying to open this port. */ clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); + spin_unlock_irqrestore(&port->lock, flags); wake_up_interruptible(&port->open_wait); done: mutex_unlock(&port->mutex); } -static void uart_wait_until_sent(struct tty_struct *tty, int timeout) +static void __uart_wait_until_sent(struct uart_port *port, int timeout) { - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; unsigned long char_time, expire; if (port->type == PORT_UNKNOWN || port->fifosize == 0) return; - lock_kernel(); - /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check @@ -1416,7 +1433,16 @@ static void uart_wait_until_sent(struct tty_struct *tty, int timeout) break; } set_current_state(TASK_RUNNING); /* might not be needed */ - unlock_kernel(); +} + +static void uart_wait_until_sent(struct tty_struct *tty, int timeout) +{ + struct uart_state *state = tty->driver_data; + struct uart_port *port = state->uart_port; + + tty_lock(); + __uart_wait_until_sent(port, timeout); + tty_unlock(); } /* @@ -1429,16 +1455,19 @@ static void uart_hangup(struct tty_struct *tty) { struct uart_state *state = tty->driver_data; struct tty_port *port = &state->port; + unsigned long flags; - BUG_ON(!kernel_locked()); + BUG_ON(!tty_locked()); pr_debug("uart_hangup(%d)\n", state->uart_port->line); mutex_lock(&port->mutex); if (port->flags & ASYNC_NORMAL_ACTIVE) { uart_flush_buffer(tty); - uart_shutdown(state); + uart_shutdown(tty, state); + spin_lock_irqsave(&port->lock, flags); port->count = 0; clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); + spin_unlock_irqrestore(&port->lock, flags); tty_port_tty_set(port, NULL); wake_up_interruptible(&port->open_wait); wake_up_interruptible(&port->delta_msr_wait); @@ -1446,15 +1475,19 @@ static void uart_hangup(struct tty_struct *tty) mutex_unlock(&port->mutex); } -/* - * Copy across the serial console cflag setting into the termios settings - * for the initial open of the port. This allows continuity between the - * kernel settings, and the settings init adopts when it opens the port - * for the first time. +/** + * uart_update_termios - update the terminal hw settings + * @tty: tty associated with UART + * @state: UART to update + * + * Copy across the serial console cflag setting into the termios settings + * for the initial open of the port. This allows continuity between the + * kernel settings, and the settings init adopts when it opens the port + * for the first time. */ -static void uart_update_termios(struct uart_state *state) +static void uart_update_termios(struct tty_struct *tty, + struct uart_state *state) { - struct tty_struct *tty = state->port.tty; struct uart_port *port = state->uart_port; if (uart_console(port) && port->cons->cflag) { @@ -1471,7 +1504,7 @@ static void uart_update_termios(struct uart_state *state) /* * Make termios settings take effect. */ - uart_change_speed(state, NULL); + uart_change_speed(tty, state, NULL); /* * And finally enable the RTS and DTR signals. @@ -1481,90 +1514,37 @@ static void uart_update_termios(struct uart_state *state) } } -/* - * Block the open until the port is ready. We must be called with - * the per-port semaphore held. - */ -static int -uart_block_til_ready(struct file *filp, struct uart_state *state) +static int uart_carrier_raised(struct tty_port *port) { - DECLARE_WAITQUEUE(wait, current); + struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - unsigned int mctrl; - - port->blocked_open++; - port->count--; - - add_wait_queue(&port->open_wait, &wait); - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - - /* - * If we have been hung up, tell userspace/restart open. - */ - if (tty_hung_up_p(filp) || port->tty == NULL) - break; - - /* - * If the port has been closed, tell userspace/restart open. - */ - if (!(port->flags & ASYNC_INITIALIZED)) - break; + int mctrl; + spin_lock_irq(&uport->lock); + uport->ops->enable_ms(uport); + mctrl = uport->ops->get_mctrl(uport); + spin_unlock_irq(&uport->lock); + if (mctrl & TIOCM_CAR) + return 1; + return 0; +} - /* - * If non-blocking mode is set, or CLOCAL mode is set, - * we don't want to wait for the modem status lines to - * indicate that the port is ready. - * - * Also, if the port is not enabled/configured, we want - * to allow the open to succeed here. Note that we will - * have set TTY_IO_ERROR for a non-existant port. - */ - if ((filp->f_flags & O_NONBLOCK) || - (port->tty->termios->c_cflag & CLOCAL) || - (port->tty->flags & (1 << TTY_IO_ERROR))) - break; +static void uart_dtr_rts(struct tty_port *port, int onoff) +{ + struct uart_state *state = container_of(port, struct uart_state, port); + struct uart_port *uport = state->uart_port; - /* - * Set DTR to allow modem to know we're waiting. Do - * not set RTS here - we want to make sure we catch - * the data from the modem. - */ - if (port->tty->termios->c_cflag & CBAUD) - uart_set_mctrl(uport, TIOCM_DTR); + if (onoff) { + uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS); /* - * and wait for the carrier to indicate that the - * modem is ready for us. + * If this is the first open to succeed, + * adjust things to suit. */ - spin_lock_irq(&uport->lock); - uport->ops->enable_ms(uport); - mctrl = uport->ops->get_mctrl(uport); - spin_unlock_irq(&uport->lock); - if (mctrl & TIOCM_CAR) - break; - - mutex_unlock(&port->mutex); - schedule(); - mutex_lock(&port->mutex); - - if (signal_pending(current)) - break; + if (!test_and_set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags)) + uart_update_termios(port->tty, state); } - set_current_state(TASK_RUNNING); - remove_wait_queue(&port->open_wait, &wait); - - port->count++; - port->blocked_open--; - - if (signal_pending(current)) - return -ERESTARTSYS; - - if (!port->tty || tty_hung_up_p(filp)) - return -EAGAIN; - - return 0; + else + uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); } static struct uart_state *uart_get(struct uart_driver *drv, int line) @@ -1611,7 +1591,7 @@ static int uart_open(struct tty_struct *tty, struct file *filp) struct tty_port *port; int retval, line = tty->index; - BUG_ON(!kernel_locked()); + BUG_ON(!tty_locked()); pr_debug("uart_open(%d) called\n", line); /* @@ -1668,23 +1648,14 @@ static int uart_open(struct tty_struct *tty, struct file *filp) /* * Start up the serial port. */ - retval = uart_startup(state, 0); + retval = uart_startup(tty, state, 0); /* * If we succeeded, wait until the port is ready. */ - if (retval == 0) - retval = uart_block_til_ready(filp, state); mutex_unlock(&port->mutex); - - /* - * If this is the first open to succeed, adjust things to suit. - */ - if (retval == 0 && !(port->flags & ASYNC_NORMAL_ACTIVE)) { - set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); - - uart_update_termios(state); - } + if (retval == 0) + retval = tty_port_block_til_ready(port, tty, filp); fail: return retval; @@ -2010,9 +1981,13 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) struct tty_port *port = &state->port; struct device *tty_dev; struct uart_match match = {uport, drv}; + struct tty_struct *tty; mutex_lock(&port->mutex); + /* Must be inside the mutex lock until we convert to tty_port */ + tty = port->tty; + tty_dev = device_find_child(uport->dev, &match, serial_match_port); if (device_may_wakeup(tty_dev)) { enable_irq_wake(uport->irq); @@ -2105,9 +2080,12 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) ops->set_mctrl(uport, 0); spin_unlock_irq(&uport->lock); if (console_suspend_enabled || !uart_console(uport)) { + /* Protected by port mutex for now */ + struct tty_struct *tty = port->tty; ret = ops->startup(uport); if (ret == 0) { - uart_change_speed(state, NULL); + if (tty) + uart_change_speed(tty, state, NULL); spin_lock_irq(&uport->lock); ops->set_mctrl(uport, uport->mctrl); ops->start_tx(uport); @@ -2119,7 +2097,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) * Clear the "initialized" flag so we won't try * to call the low level drivers shutdown method. */ - uart_shutdown(state); + uart_shutdown(tty, state); } } @@ -2312,6 +2290,11 @@ static const struct tty_operations uart_ops = { #endif }; +static const struct tty_port_operations uart_port_ops = { + .carrier_raised = uart_carrier_raised, + .dtr_rts = uart_dtr_rts, +}; + /** * uart_register_driver - register a driver with the uart core layer * @drv: low level driver structure @@ -2368,6 +2351,7 @@ int uart_register_driver(struct uart_driver *drv) struct tty_port *port = &state->port; tty_port_init(port); + port->ops = &uart_port_ops; port->close_delay = 500; /* .5 seconds */ port->closing_wait = 30000; /* 30 seconds */ tasklet_init(&state->tlet, uart_tasklet_action, diff --git a/drivers/serial/timbuart.c b/drivers/serial/timbuart.c index 67ca642713b8..1f36b7eb7351 100644 --- a/drivers/serial/timbuart.c +++ b/drivers/serial/timbuart.c @@ -423,7 +423,7 @@ static struct uart_driver timbuart_driver = { .nr = 1 }; -static int timbuart_probe(struct platform_device *dev) +static int __devinit timbuart_probe(struct platform_device *dev) { int err, irq; struct timbuart_port *uart; @@ -489,7 +489,7 @@ err_mem: return err; } -static int timbuart_remove(struct platform_device *dev) +static int __devexit timbuart_remove(struct platform_device *dev) { struct timbuart_port *uart = platform_get_drvdata(dev); @@ -507,7 +507,7 @@ static struct platform_driver timbuart_platform_driver = { .owner = THIS_MODULE, }, .probe = timbuart_probe, - .remove = timbuart_remove, + .remove = __devexit_p(timbuart_remove), }; /*--------------------------------------------------------------------------*/ diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 89d260d6b031..1833b3a71515 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -636,19 +636,13 @@ static void acm_tty_unregister(struct acm *acm) static int acm_tty_chars_in_buffer(struct tty_struct *tty); -static void acm_port_down(struct acm *acm, int drain) +static void acm_port_down(struct acm *acm) { int i, nr = acm->rx_buflimit; mutex_lock(&open_mutex); if (acm->dev) { usb_autopm_get_interface(acm->control); acm_set_control(acm, acm->ctrlout = 0); - /* try letting the last writes drain naturally */ - if (drain) { - wait_event_interruptible_timeout(acm->drain_wait, - (ACM_NW == acm_wb_is_avail(acm)) || !acm->dev, - ACM_CLOSE_TIMEOUT * HZ); - } usb_kill_urb(acm->ctrlurb); for (i = 0; i < ACM_NW; i++) usb_kill_urb(acm->wb[i].urb); @@ -664,7 +658,7 @@ static void acm_tty_hangup(struct tty_struct *tty) { struct acm *acm = tty->driver_data; tty_port_hangup(&acm->port); - acm_port_down(acm, 0); + acm_port_down(acm); } static void acm_tty_close(struct tty_struct *tty, struct file *filp) @@ -685,7 +679,7 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&open_mutex); return; } - acm_port_down(acm, 0); + acm_port_down(acm); tty_port_close_end(&acm->port, tty); tty_port_tty_set(&acm->port, NULL); } diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index fd35f73b5721..b92070c103cd 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -609,8 +609,10 @@ static void digi_wakeup_write_lock(struct work_struct *work) static void digi_wakeup_write(struct usb_serial_port *port) { struct tty_struct *tty = tty_port_tty_get(&port->port); - tty_wakeup(tty); - tty_kref_put(tty); + if (tty) { + tty_wakeup(tty); + tty_kref_put(tty); + } } @@ -1682,7 +1684,7 @@ static int digi_read_inb_callback(struct urb *urb) priv->dp_throttle_restart = 1; /* receive data */ - if (opcode == DIGI_CMD_RECEIVE_DATA) { + if (tty && opcode == DIGI_CMD_RECEIVE_DATA) { /* get flag from port_status */ flag = 0; @@ -1763,10 +1765,12 @@ static int digi_read_oob_callback(struct urb *urb) return -1; tty = tty_port_tty_get(&port->port); + rts = 0; - rts = tty->termios->c_cflag & CRTSCTS; + if (tty) + rts = tty->termios->c_cflag & CRTSCTS; - if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) { + if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { spin_lock(&priv->dp_port_lock); /* convert from digi flags to termiox flags */ if (val & DIGI_READ_INPUT_SIGNALS_CTS) { diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 3b3f5749af92..26bf7cbfecc2 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -283,7 +283,8 @@ static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) struct fbcon_ops *ops = info->fbcon_par; return (info->state != FBINFO_STATE_RUNNING || - vc->vc_mode != KD_TEXT || ops->graphics); + vc->vc_mode != KD_TEXT || ops->graphics) && + !vt_force_oops_output(vc); } static inline int get_color(struct vc_data *vc, struct fb_info *info, @@ -1073,6 +1074,7 @@ static void fbcon_init(struct vc_data *vc, int init) if (p->userfont) charcnt = FNTCHARCNT(p->fontdata); + vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT); vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; if (charcnt == 256) { diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 182dd6f8aadd..54e32c513610 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -1108,7 +1108,6 @@ static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512) charmap += 4 * cmapsz; #endif - unlock_kernel(); spin_lock_irq(&vga_lock); /* First, the Sequencer */ vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); @@ -1192,7 +1191,6 @@ static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512) vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); } spin_unlock_irq(&vga_lock); - lock_kernel(); return 0; } diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 5d9b936c458b..70227e0dc01d 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -946,6 +946,7 @@ COMPATIBLE_IOCTL(TIOCGPGRP) COMPATIBLE_IOCTL(TIOCGPTN) COMPATIBLE_IOCTL(TIOCSPTLCK) COMPATIBLE_IOCTL(TIOCSERGETLSR) +COMPATIBLE_IOCTL(TIOCSIG) #ifdef TCGETS2 COMPATIBLE_IOCTL(TCGETS2) COMPATIBLE_IOCTL(TCSETS2) diff --git a/include/asm-generic/ioctls.h b/include/asm-generic/ioctls.h index a799e20a769e..8554cb6a81b9 100644 --- a/include/asm-generic/ioctls.h +++ b/include/asm-generic/ioctls.h @@ -69,6 +69,7 @@ #define TCSETX 0x5433 #define TCSETXF 0x5434 #define TCSETXW 0x5435 +#define TIOCSIG _IOW('T', 0x36, int) /* pty: generate signal */ #define FIONCLEX 0x5450 #define FIOCLEX 0x5451 @@ -87,12 +88,10 @@ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */ /* - * some architectures define FIOQSIZE as 0x545E, which is used for - * TIOCGHAYESESP on others + * Some arches already define FIOQSIZE due to a historical + * conflict with a Hayes modem-specific ioctl value. */ #ifndef FIOQSIZE -# define TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */ -# define TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */ # define FIOQSIZE 0x5460 #endif @@ -104,6 +103,7 @@ #define TIOCPKT_START 8 #define TIOCPKT_NOSTOP 16 #define TIOCPKT_DOSTOP 32 +#define TIOCPKT_IOCTL 64 #define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ diff --git a/include/asm-generic/termbits.h b/include/asm-generic/termbits.h index 1c9773d48cb0..232b4781aef3 100644 --- a/include/asm-generic/termbits.h +++ b/include/asm-generic/termbits.h @@ -178,6 +178,7 @@ struct ktermios { #define FLUSHO 0010000 #define PENDIN 0040000 #define IEXTEN 0100000 +#define EXTPROC 0200000 /* tcflow() and TCXONC use these */ #define TCOOFF 0 diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index 38fe59dc89ae..7f0c32908568 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -21,6 +21,8 @@ struct vt_struct; #define NPAR 16 struct vc_data { + struct tty_port port; /* Upper level data */ + unsigned short vc_num; /* Console number */ unsigned int vc_cols; /* [#] Console size */ unsigned int vc_rows; @@ -56,7 +58,6 @@ struct vc_data { /* VT terminal data */ unsigned int vc_state; /* Escape sequence parser state */ unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */ - struct tty_struct *vc_tty; /* TTY we are attached to */ /* data for manual vt switching */ struct vt_mode vt_mode; struct pid *vt_pid; @@ -105,6 +106,7 @@ struct vc_data { struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */ unsigned long vc_uni_pagedir; unsigned long *vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */ + bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */ /* additional information is in vt_kern.h */ }; diff --git a/include/linux/fb.h b/include/linux/fb.h index 0c5659c41b01..f0268deca658 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -825,6 +825,10 @@ struct fb_tile_ops { */ #define FBINFO_BE_MATH 0x100000 +/* report to the VT layer that this fb driver can accept forced console + output like oopses */ +#define FBINFO_CAN_FORCE_OUTPUT 0x200000 + struct fb_info { int node; int flags; diff --git a/include/linux/istallion.h b/include/linux/istallion.h index 7faca98c7d14..ad700a60c158 100644 --- a/include/linux/istallion.h +++ b/include/linux/istallion.h @@ -86,7 +86,7 @@ struct stlibrd { unsigned long magic; unsigned int brdnr; unsigned int brdtype; - unsigned int state; + unsigned long state; unsigned int nrpanels; unsigned int nrports; unsigned int nrdevs; diff --git a/include/linux/serial.h b/include/linux/serial.h index c8613c3ff9d3..1ebc694a6d52 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -77,7 +77,8 @@ struct serial_struct { #define PORT_16654 11 #define PORT_16850 12 #define PORT_RSA 13 /* RSA-DV II/S card */ -#define PORT_MAX 13 +#define PORT_U6_16550A 14 +#define PORT_MAX 14 #define SERIAL_IO_PORT 0 #define SERIAL_IO_HUB6 1 @@ -151,7 +152,7 @@ struct serial_uart_config { #define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART) #define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE) -#define ASYNC_FLAGS ((1U << ASYNCB_LAST_USER) - 1) +#define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1) #define ASYNC_USR_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI| \ ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY) #define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI) @@ -210,8 +211,10 @@ struct serial_rs485 { #define SER_RS485_ENABLED (1 << 0) #define SER_RS485_RTS_ON_SEND (1 << 1) #define SER_RS485_RTS_AFTER_SEND (1 << 2) +#define SER_RS485_RTS_BEFORE_SEND (1 << 3) __u32 delay_rts_before_send; /* Milliseconds */ - __u32 padding[6]; /* Memory is cheap, new structs + __u32 delay_rts_after_send; /* Milliseconds */ + __u32 padding[5]; /* Memory is cheap, new structs are a royal PITA .. */ }; diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index fb46aba11fb5..7638deaaba65 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -32,6 +32,9 @@ struct plat_serial8250_port { unsigned int type; /* If UPF_FIXED_TYPE */ unsigned int (*serial_in)(struct uart_port *, int); void (*serial_out)(struct uart_port *, int, int); + void (*set_termios)(struct uart_port *, + struct ktermios *new, + struct ktermios *old); }; /* @@ -71,5 +74,7 @@ extern int early_serial_setup(struct uart_port *port); extern int serial8250_find_port(struct uart_port *p); extern int serial8250_find_port_for_earlycon(void); extern int setup_early_serial8250_console(char *cmdline); +extern void serial8250_do_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old); #endif diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index f10db6e5f3b5..8129ca2d57e3 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -186,6 +186,12 @@ #define PORT_ALTERA_JTAGUART 91 #define PORT_ALTERA_UART 92 +/* MAX3107 */ +#define PORT_MAX3107 94 + +/* High Speed UART for Medfield */ +#define PORT_MFD 95 + #ifdef __KERNEL__ #include <linux/compiler.h> @@ -220,7 +226,7 @@ struct uart_ops { void (*flush_buffer)(struct uart_port *); void (*set_termios)(struct uart_port *, struct ktermios *new, struct ktermios *old); - void (*set_ldisc)(struct uart_port *); + void (*set_ldisc)(struct uart_port *, int new); void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); int (*set_wake)(struct uart_port *, unsigned int state); @@ -276,6 +282,9 @@ struct uart_port { unsigned char __iomem *membase; /* read/write[bwl] */ unsigned int (*serial_in)(struct uart_port *, int); void (*serial_out)(struct uart_port *, int, int); + void (*set_termios)(struct uart_port *, + struct ktermios *new, + struct ktermios *old); unsigned int irq; /* irq number */ unsigned long irqflags; /* irq flags */ unsigned int uartclk; /* base uart clock */ diff --git a/include/linux/serial_mfd.h b/include/linux/serial_mfd.h new file mode 100644 index 000000000000..2b071e0b034d --- /dev/null +++ b/include/linux/serial_mfd.h @@ -0,0 +1,47 @@ +#ifndef _SERIAL_MFD_H_ +#define _SERIAL_MFD_H_ + +/* HW register offset definition */ +#define UART_FOR 0x08 +#define UART_PS 0x0C +#define UART_MUL 0x0D +#define UART_DIV 0x0E + +#define HSU_GBL_IEN 0x0 +#define HSU_GBL_IST 0x4 + +#define HSU_GBL_INT_BIT_PORT0 0x0 +#define HSU_GBL_INT_BIT_PORT1 0x1 +#define HSU_GBL_INT_BIT_PORT2 0x2 +#define HSU_GBL_INT_BIT_IRI 0x3 +#define HSU_GBL_INT_BIT_HDLC 0x4 +#define HSU_GBL_INT_BIT_DMA 0x5 + +#define HSU_GBL_ISR 0x8 +#define HSU_GBL_DMASR 0x400 +#define HSU_GBL_DMAISR 0x404 + +#define HSU_PORT_REG_OFFSET 0x80 +#define HSU_PORT0_REG_OFFSET 0x80 +#define HSU_PORT1_REG_OFFSET 0x100 +#define HSU_PORT2_REG_OFFSET 0x180 +#define HSU_PORT_REG_LENGTH 0x80 + +#define HSU_DMA_CHANS_REG_OFFSET 0x500 +#define HSU_DMA_CHANS_REG_LENGTH 0x40 + +#define HSU_CH_SR 0x0 /* channel status reg */ +#define HSU_CH_CR 0x4 /* control reg */ +#define HSU_CH_DCR 0x8 /* descriptor control reg */ +#define HSU_CH_BSR 0x10 /* max fifo buffer size reg */ +#define HSU_CH_MOTSR 0x14 /* minimum ocp transfer size */ +#define HSU_CH_D0SAR 0x20 /* desc 0 start addr */ +#define HSU_CH_D0TSR 0x24 /* desc 0 transfer size */ +#define HSU_CH_D1SAR 0x28 +#define HSU_CH_D1TSR 0x2C +#define HSU_CH_D2SAR 0x30 +#define HSU_CH_D2TSR 0x34 +#define HSU_CH_D3SAR 0x38 +#define HSU_CH_D3TSR 0x3C + +#endif diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h index cf9327c051ad..c7a0ce11cd47 100644 --- a/include/linux/serial_reg.h +++ b/include/linux/serial_reg.h @@ -221,8 +221,24 @@ #define UART_FCR_PXAR16 0x80 /* receive FIFO threshold = 16 */ #define UART_FCR_PXAR32 0xc0 /* receive FIFO threshold = 32 */ +/* + * Intel MID on-chip HSU (High Speed UART) defined bits + */ +#define UART_FCR_HSU_64_1B 0x00 /* receive FIFO treshold = 1 */ +#define UART_FCR_HSU_64_16B 0x40 /* receive FIFO treshold = 16 */ +#define UART_FCR_HSU_64_32B 0x80 /* receive FIFO treshold = 32 */ +#define UART_FCR_HSU_64_56B 0xc0 /* receive FIFO treshold = 56 */ + +#define UART_FCR_HSU_16_1B 0x00 /* receive FIFO treshold = 1 */ +#define UART_FCR_HSU_16_4B 0x40 /* receive FIFO treshold = 4 */ +#define UART_FCR_HSU_16_8B 0x80 /* receive FIFO treshold = 8 */ +#define UART_FCR_HSU_16_14B 0xc0 /* receive FIFO treshold = 14 */ +#define UART_FCR_HSU_64B_FIFO 0x20 /* chose 64 bytes FIFO */ +#define UART_FCR_HSU_16B_FIFO 0x00 /* chose 16 bytes FIFO */ +#define UART_FCR_HALF_EMPT_TXI 0x00 /* trigger TX_EMPT IRQ for half empty */ +#define UART_FCR_FULL_EMPT_TXI 0x08 /* trigger TX_EMPT IRQ for full empty */ /* * These register definitions are for the 16C950 diff --git a/include/linux/tty.h b/include/linux/tty.h index 7802a243ee13..1437da3ddc62 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -13,6 +13,7 @@ #include <linux/tty_driver.h> #include <linux/tty_ldisc.h> #include <linux/mutex.h> +#include <linux/smp_lock.h> #include <asm/system.h> @@ -179,6 +180,7 @@ struct tty_bufhead { #define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO) #define L_PENDIN(tty) _L_FLAG((tty), PENDIN) #define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN) +#define L_EXTPROC(tty) _L_FLAG((tty), EXTPROC) struct device; struct signal_struct; @@ -415,6 +417,7 @@ extern int is_ignored(int sig); extern int tty_signal(int sig, struct tty_struct *tty); extern void tty_hangup(struct tty_struct *tty); extern void tty_vhangup(struct tty_struct *tty); +extern void tty_vhangup_locked(struct tty_struct *tty); extern void tty_vhangup_self(void); extern void tty_unhangup(struct file *filp); extern int tty_hung_up_p(struct file *filp); @@ -575,5 +578,54 @@ extern int vt_ioctl(struct tty_struct *tty, struct file *file, extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg); +/* tty_mutex.c */ +/* functions for preparation of BKL removal */ +extern void __lockfunc tty_lock(void) __acquires(tty_lock); +extern void __lockfunc tty_unlock(void) __releases(tty_lock); +extern struct task_struct *__big_tty_mutex_owner; +#define tty_locked() (current == __big_tty_mutex_owner) + +/* + * wait_event_interruptible_tty -- wait for a condition with the tty lock held + * + * The condition we are waiting for might take a long time to + * become true, or might depend on another thread taking the + * BTM. In either case, we need to drop the BTM to guarantee + * forward progress. This is a leftover from the conversion + * from the BKL and should eventually get removed as the BTM + * falls out of use. + * + * Do not use in new code. + */ +#define wait_event_interruptible_tty(wq, condition) \ +({ \ + int __ret = 0; \ + if (!(condition)) { \ + __wait_event_interruptible_tty(wq, condition, __ret); \ + } \ + __ret; \ +}) + +#define __wait_event_interruptible_tty(wq, condition, ret) \ +do { \ + DEFINE_WAIT(__wait); \ + \ + for (;;) { \ + prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \ + if (condition) \ + break; \ + if (!signal_pending(current)) { \ + tty_unlock(); \ + schedule(); \ + tty_lock(); \ + continue; \ + } \ + ret = -ERESTARTSYS; \ + break; \ + } \ + finish_wait(&wq, &__wait); \ +} while (0) + + #endif /* __KERNEL__ */ #endif diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h index 7f56db4a79f0..6625cc1ab758 100644 --- a/include/linux/vt_kern.h +++ b/include/linux/vt_kern.h @@ -76,17 +76,52 @@ int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc); #define vc_translate(vc, c) ((vc)->vc_translate[(c) | \ ((vc)->vc_toggle_meta ? 0x80 : 0)]) #else -#define con_set_trans_old(arg) (0) -#define con_get_trans_old(arg) (-EINVAL) -#define con_set_trans_new(arg) (0) -#define con_get_trans_new(arg) (-EINVAL) -#define con_clear_unimap(vc, ui) (0) -#define con_set_unimap(vc, ct, list) (0) -#define con_set_default_unimap(vc) (0) -#define con_copy_unimap(d, s) (0) -#define con_get_unimap(vc, ct, uct, list) (-EINVAL) -#define con_free_unimap(vc) do { ; } while (0) -#define con_protect_unimap(vc, rdonly) do { ; } while (0) +static inline int con_set_trans_old(unsigned char __user *table) +{ + return 0; +} +static inline int con_get_trans_old(unsigned char __user *table) +{ + return -EINVAL; +} +static inline int con_set_trans_new(unsigned short __user *table) +{ + return 0; +} +static inline int con_get_trans_new(unsigned short __user *table) +{ + return -EINVAL; +} +static inline int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui) +{ + return 0; +} +static inline +int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) +{ + return 0; +} +static inline +int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, + struct unipair __user *list) +{ + return -EINVAL; +} +static inline int con_set_default_unimap(struct vc_data *vc) +{ + return 0; +} +static inline void con_free_unimap(struct vc_data *vc) +{ +} +static inline void con_protect_unimap(struct vc_data *vc, int rdonly) +{ +} +static inline +int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) +{ + return 0; +} #define vc_translate(vc, c) (c) #endif @@ -100,6 +135,13 @@ extern int unbind_con_driver(const struct consw *csw, int first, int last, int deflt); int vty_init(const struct file_operations *console_fops); +static inline bool vt_force_oops_output(struct vc_data *vc) +{ + if (oops_in_progress && vc->vc_panic_force_write) + return true; + return false; +} + /* * vc_screen.c shares this temporary buffer with the console write code so that * we can easily avoid touching user space while holding the console spinlock. |