diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/8250.c | 85 | ||||
| -rw-r--r-- | drivers/serial/8250_pci.c | 192 | ||||
| -rw-r--r-- | drivers/serial/serial_core.c | 7 | ||||
| -rw-r--r-- | drivers/serial/serial_txx9.c | 14 |
4 files changed, 264 insertions, 34 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 301313002f6b..f94109cbb46e 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -129,7 +129,16 @@ struct uart_8250_port { unsigned char mcr; unsigned char mcr_mask; /* mask of user bits */ unsigned char mcr_force; /* mask of forced bits */ - unsigned char lsr_break_flag; + + /* + * Some bits in registers are cleared on a read, so they must + * be saved whenever the register is read but the bits will not + * be immediately processed. + */ +#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS + unsigned char lsr_saved_flags; +#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA + unsigned char msr_saved_flags; /* * We provide a per-port pm hook. @@ -1238,6 +1247,7 @@ static void serial8250_start_tx(struct uart_port *port) if (up->bugs & UART_BUG_TXEN) { unsigned char lsr, iir; lsr = serial_in(up, UART_LSR); + up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; iir = serial_in(up, UART_IIR) & 0x0f; if ((up->port.type == PORT_RM9000) ? (lsr & UART_LSR_THRE && @@ -1290,18 +1300,10 @@ receive_chars(struct uart_8250_port *up, unsigned int *status) flag = TTY_NORMAL; up->port.icount.rx++; -#ifdef CONFIG_SERIAL_8250_CONSOLE - /* - * Recover the break flag from console xmit - */ - if (up->port.line == up->port.cons->index) { - lsr |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } -#endif + lsr |= up->lsr_saved_flags; + up->lsr_saved_flags = 0; - if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { + if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) { /* * For statistics only */ @@ -1392,6 +1394,8 @@ static unsigned int check_modem_status(struct uart_8250_port *up) { unsigned int status = serial_in(up, UART_MSR); + status |= up->msr_saved_flags; + up->msr_saved_flags = 0; if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && up->port.info != NULL) { if (status & UART_MSR_TERI) @@ -1591,7 +1595,8 @@ static void serial8250_timeout(unsigned long data) static void serial8250_backup_timeout(unsigned long data) { struct uart_8250_port *up = (struct uart_8250_port *)data; - unsigned int iir, ier = 0; + unsigned int iir, ier = 0, lsr; + unsigned long flags; /* * Must disable interrupts or else we risk racing with the interrupt @@ -1610,9 +1615,13 @@ static void serial8250_backup_timeout(unsigned long data) * the "Diva" UART used on the management processor on many HP * ia64 and parisc boxes. */ + spin_lock_irqsave(&up->port.lock, flags); + lsr = serial_in(up, UART_LSR); + up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; + spin_unlock_irqrestore(&up->port.lock, flags); if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) && (!uart_circ_empty(&up->port.info->xmit) || up->port.x_char) && - (serial_in(up, UART_LSR) & UART_LSR_THRE)) { + (lsr & UART_LSR_THRE)) { iir &= ~(UART_IIR_ID | UART_IIR_NO_INT); iir |= UART_IIR_THRI; } @@ -1631,13 +1640,14 @@ static unsigned int serial8250_tx_empty(struct uart_port *port) { struct uart_8250_port *up = (struct uart_8250_port *)port; unsigned long flags; - unsigned int ret; + unsigned int lsr; spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; + lsr = serial_in(up, UART_LSR); + up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; spin_unlock_irqrestore(&up->port.lock, flags); - return ret; + return lsr & UART_LSR_TEMT ? TIOCSER_TEMT : 0; } static unsigned int serial8250_get_mctrl(struct uart_port *port) @@ -1708,8 +1718,7 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits) do { status = serial_in(up, UART_LSR); - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; + up->lsr_saved_flags |= status & LSR_SAVE_FLAGS; if (--tmout == 0) break; @@ -1718,8 +1727,12 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits) /* Wait up to 1s for flow control if necessary */ if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (!(serial_in(up, UART_MSR) & UART_MSR_CTS) && --tmout) { + unsigned int tmout; + for (tmout = 1000000; tmout; tmout--) { + unsigned int msr = serial_in(up, UART_MSR); + up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; + if (msr & UART_MSR_CTS) + break; udelay(1); touch_nmi_watchdog(); } @@ -1889,6 +1902,18 @@ static int serial8250_startup(struct uart_port *port) spin_unlock_irqrestore(&up->port.lock, flags); /* + * Clear the interrupt registers again for luck, and clear the + * saved flags to avoid getting false values from polling + * routines or the previous session. + */ + serial_inp(up, UART_LSR); + serial_inp(up, UART_RX); + serial_inp(up, UART_IIR); + serial_inp(up, UART_MSR); + up->lsr_saved_flags = 0; + up->msr_saved_flags = 0; + + /* * 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. @@ -1906,14 +1931,6 @@ static int serial8250_startup(struct uart_port *port) (void) inb_p(icp); } - /* - * And clear the interrupt registers again for luck. - */ - (void) serial_inp(up, UART_LSR); - (void) serial_inp(up, UART_RX); - (void) serial_inp(up, UART_IIR); - (void) serial_inp(up, UART_MSR); - return 0; } @@ -2484,6 +2501,16 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) wait_for_xmitr(up, BOTH_EMPTY); serial_out(up, UART_IER, ier); + /* + * The receive handling will happen properly because the + * receive ready bit will still be set; it is not cleared + * on read. However, modem control will not, we must + * call it if we have saved something in the saved flags + * while processing with interrupts off. + */ + if (up->msr_saved_flags) + check_modem_status(up); + if (locked) spin_unlock(&up->port.lock); local_irq_restore(flags); diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c index 5e485876f54c..bd66339f7a3f 100644 --- a/drivers/serial/8250_pci.c +++ b/drivers/serial/8250_pci.c @@ -580,6 +580,138 @@ static int pci_netmos_init(struct pci_dev *dev) return num_serial; } +/* + * ITE support by Niels de Vos <niels.devos@wincor-nixdorf.com> + * + * These chips are available with optionally one parallel port and up to + * two serial ports. Unfortunately they all have the same product id. + * + * Basic configuration is done over a region of 32 I/O ports. The base + * ioport is called INTA or INTC, depending on docs/other drivers. + * + * The region of the 32 I/O ports is configured in POSIO0R... + */ + +/* registers */ +#define ITE_887x_MISCR 0x9c +#define ITE_887x_INTCBAR 0x78 +#define ITE_887x_UARTBAR 0x7c +#define ITE_887x_PS0BAR 0x10 +#define ITE_887x_POSIO0 0x60 + +/* I/O space size */ +#define ITE_887x_IOSIZE 32 +/* I/O space size (bits 26-24; 8 bytes = 011b) */ +#define ITE_887x_POSIO_IOSIZE_8 (3 << 24) +/* I/O space size (bits 26-24; 32 bytes = 101b) */ +#define ITE_887x_POSIO_IOSIZE_32 (5 << 24) +/* Decoding speed (1 = slow, 2 = medium, 3 = fast) */ +#define ITE_887x_POSIO_SPEED (3 << 29) +/* enable IO_Space bit */ +#define ITE_887x_POSIO_ENABLE (1 << 31) + +static int __devinit pci_ite887x_init(struct pci_dev *dev) +{ + /* inta_addr are the configuration addresses of the ITE */ + static const short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1e0, + 0x200, 0x280, 0 }; + int ret, i, type; + struct resource *iobase = NULL; + u32 miscr, uartbar, ioport; + + /* search for the base-ioport */ + i = 0; + while (inta_addr[i] && iobase == NULL) { + iobase = request_region(inta_addr[i], ITE_887x_IOSIZE, + "ite887x"); + if (iobase != NULL) { + /* write POSIO0R - speed | size | ioport */ + pci_write_config_dword(dev, ITE_887x_POSIO0, + ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED | + ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]); + /* write INTCBAR - ioport */ + pci_write_config_dword(dev, ITE_887x_INTCBAR, inta_addr[i]); + ret = inb(inta_addr[i]); + if (ret != 0xff) { + /* ioport connected */ + break; + } + release_region(iobase->start, ITE_887x_IOSIZE); + iobase = NULL; + } + i++; + } + + if (!inta_addr[i]) { + printk(KERN_ERR "ite887x: could not find iobase\n"); + return -ENODEV; + } + + /* start of undocumented type checking (see parport_pc.c) */ + type = inb(iobase->start + 0x18) & 0x0f; + + switch (type) { + case 0x2: /* ITE8871 (1P) */ + case 0xa: /* ITE8875 (1P) */ + ret = 0; + break; + case 0xe: /* ITE8872 (2S1P) */ + ret = 2; + break; + case 0x6: /* ITE8873 (1S) */ + ret = 1; + break; + case 0x8: /* ITE8874 (2S) */ + ret = 2; + break; + default: + moan_device("Unknown ITE887x", dev); + ret = -ENODEV; + } + + /* configure all serial ports */ + for (i = 0; i < ret; i++) { + /* read the I/O port from the device */ + pci_read_config_dword(dev, ITE_887x_PS0BAR + (0x4 * (i + 1)), + &ioport); + ioport &= 0x0000FF00; /* the actual base address */ + pci_write_config_dword(dev, ITE_887x_POSIO0 + (0x4 * (i + 1)), + ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED | + ITE_887x_POSIO_IOSIZE_8 | ioport); + + /* write the ioport to the UARTBAR */ + pci_read_config_dword(dev, ITE_887x_UARTBAR, &uartbar); + uartbar &= ~(0xffff << (16 * i)); /* clear half the reg */ + uartbar |= (ioport << (16 * i)); /* set the ioport */ + pci_write_config_dword(dev, ITE_887x_UARTBAR, uartbar); + + /* get current config */ + pci_read_config_dword(dev, ITE_887x_MISCR, &miscr); + /* disable interrupts (UARTx_Routing[3:0]) */ + miscr &= ~(0xf << (12 - 4 * i)); + /* activate the UART (UARTx_En) */ + miscr |= 1 << (23 - i); + /* write new config with activated UART */ + pci_write_config_dword(dev, ITE_887x_MISCR, miscr); + } + + if (ret <= 0) { + /* the device has no UARTs if we get here */ + release_region(iobase->start, ITE_887x_IOSIZE); + } + + return ret; +} + +static void __devexit pci_ite887x_exit(struct pci_dev *dev) +{ + u32 ioport; + /* the ioport is bit 0-15 in POSIO0R */ + pci_read_config_dword(dev, ITE_887x_POSIO0, &ioport); + ioport &= 0xffff; + release_region(ioport, ITE_887x_IOSIZE); +} + static int pci_default_setup(struct serial_private *priv, struct pciserial_board *board, struct uart_port *port, int idx) @@ -653,6 +785,18 @@ static struct pci_serial_quirk pci_serial_quirks[] = { .setup = pci_default_setup, }, /* + * ITE + */ + { + .vendor = PCI_VENDOR_ID_ITE, + .device = PCI_DEVICE_ID_ITE_8872, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .init = pci_ite887x_init, + .setup = pci_default_setup, + .exit = __devexit_p(pci_ite887x_exit), + }, + /* * Panacom */ { @@ -933,6 +1077,7 @@ enum pci_board_num_t { pbn_b1_2_1250000, + pbn_b1_bt_1_115200, pbn_b1_bt_2_921600, pbn_b1_1_1382400, @@ -983,6 +1128,7 @@ enum pci_board_num_t { pbn_exar_XR17C152, pbn_exar_XR17C154, pbn_exar_XR17C158, + pbn_pasemi_1682M, }; /* @@ -1211,6 +1357,13 @@ static struct pciserial_board pci_boards[] __devinitdata = { .uart_offset = 8, }, + [pbn_b1_bt_1_115200] = { + .flags = FL_BASE1|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [pbn_b1_bt_2_921600] = { .flags = FL_BASE1|FL_BASE_BARS, .num_ports = 2, @@ -1498,6 +1651,18 @@ static struct pciserial_board pci_boards[] __devinitdata = { .base_baud = 921600, .uart_offset = 0x200, }, + /* + * PA Semi PWRficient PA6T-1682M on-chip UART + */ + [pbn_pasemi_1682M] = { + .flags = FL_BASE0, + .num_ports = 1, + .base_baud = 8333333, + }, +}; + +static const struct pci_device_id softmodem_blacklist[] = { + { PCI_VDEVICE ( AL, 0x5457 ), }, /* ALi Corporation M5457 AC'97 Modem */ }; /* @@ -1508,6 +1673,7 @@ static struct pciserial_board pci_boards[] __devinitdata = { static int __devinit serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) { + const struct pci_device_id *blacklist; int num_iomem, num_port, first_port = -1, i; /* @@ -1522,6 +1688,18 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) (dev->class & 0xff) > 6) return -ENODEV; + /* + * Do not access blacklisted devices that are known not to + * feature serial ports. + */ + for (blacklist = softmodem_blacklist; + blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist); + blacklist++) { + if (dev->vendor == blacklist->vendor && + dev->device == blacklist->device) + return -ENODEV; + } + num_iomem = num_port = 0; for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { if (pci_resource_flags(dev, i) & IORESOURCE_IO) { @@ -2364,6 +2542,13 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_1_115200 }, + /* + * ITE + */ + { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, + pbn_b1_bt_1_115200 }, /* * IntaShield IS-200 @@ -2382,6 +2567,13 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_SUBVENDOR_ID_PERLE, PCI_SUBDEVICE_ID_PCI_RAS8, 0, 0, pbn_b2_8_921600 }, /* + * PA Semi PA6T-1682M on-chip UART + */ + { PCI_VENDOR_ID_PASEMI, 0xa004, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pasemi_1682M }, + + /* * These entries match devices with class COMMUNICATION_SERIAL, * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL */ diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 030a6063541d..a055f58f342f 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -1146,11 +1146,14 @@ static void uart_set_termios(struct tty_struct *tty, struct ktermios *old_termio /* * These are the bits that are used to setup various - * flags in the low level driver. + * flags in the low level driver. We can ignore the Bfoo + * bits in c_cflag; c_[io]speed will always be set + * appropriately by set_termios() in tty_ioctl.c */ #define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) - if ((cflag ^ old_termios->c_cflag) == 0 && + tty->termios->c_ospeed == old_termios->c_ospeed && + tty->termios->c_ispeed == old_termios->c_ispeed && RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) return; diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c index b8f91e018b21..0930e2a85514 100644 --- a/drivers/serial/serial_txx9.c +++ b/drivers/serial/serial_txx9.c @@ -37,7 +37,7 @@ #include <asm/io.h> -static char *serial_version = "1.09"; +static char *serial_version = "1.10"; static char *serial_name = "TX39/49 Serial driver"; #define PASS_LIMIT 256 @@ -436,8 +436,10 @@ static unsigned int serial_txx9_get_mctrl(struct uart_port *port) struct uart_txx9_port *up = (struct uart_txx9_port *)port; unsigned int ret; - ret = ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS) - | ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS); + /* no modem control lines */ + ret = TIOCM_CAR | TIOCM_DSR; + ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS; + ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS; return ret; } @@ -557,6 +559,12 @@ serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, unsigned long flags; unsigned int baud, quot; + /* + * We don't support modem control lines. + */ + termios->c_cflag &= ~(HUPCL | CMSPAR); + termios->c_cflag |= CLOCAL; + cval = sio_in(up, TXX9_SILCR); /* byte size and parity */ cval &= ~TXX9_SILCR_UMODE_MASK; |