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path: root/drivers/tty/mxser.c
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-rw-r--r--drivers/tty/mxser.c2415
1 files changed, 771 insertions, 1644 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 9d00ff5ef961..2436e0b10f9a 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -41,9 +41,112 @@
#include <asm/irq.h>
#include <linux/uaccess.h>
-#include "mxser.h"
+/*
+ * Semi-public control interfaces
+ */
+
+/*
+ * MOXA ioctls
+ */
+
+#define MOXA 0x400
+#define MOXA_SET_OP_MODE (MOXA + 66)
+#define MOXA_GET_OP_MODE (MOXA + 67)
+
+#define RS232_MODE 0
+#define RS485_2WIRE_MODE 1
+#define RS422_MODE 2
+#define RS485_4WIRE_MODE 3
+#define OP_MODE_MASK 3
+
+/* --------------------------------------------------- */
+
+/*
+ * Follow just what Moxa Must chip defines.
+ *
+ * When LCR register (offset 0x03) is written the following value, the Must chip
+ * will enter enhanced mode. And a write to EFR (offset 0x02) bit 6,7 will
+ * change bank.
+ */
+#define MOXA_MUST_ENTER_ENHANCED 0xBF
+
+/* when enhanced mode is enabled, access to general bank register */
+#define MOXA_MUST_GDL_REGISTER 0x07
+#define MOXA_MUST_GDL_MASK 0x7F
+#define MOXA_MUST_GDL_HAS_BAD_DATA 0x80
+
+#define MOXA_MUST_LSR_RERR 0x80 /* error in receive FIFO */
+/* enhanced register bank select and enhanced mode setting register */
+/* This works only when LCR register equals to 0xBF */
+#define MOXA_MUST_EFR_REGISTER 0x02
+#define MOXA_MUST_EFR_EFRB_ENABLE 0x10 /* enhanced mode enable */
+/* enhanced register bank set 0, 1, 2 */
+#define MOXA_MUST_EFR_BANK0 0x00
+#define MOXA_MUST_EFR_BANK1 0x40
+#define MOXA_MUST_EFR_BANK2 0x80
+#define MOXA_MUST_EFR_BANK3 0xC0
+#define MOXA_MUST_EFR_BANK_MASK 0xC0
+
+/* set XON1 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XON1_REGISTER 0x04
+
+/* set XON2 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XON2_REGISTER 0x05
+
+/* set XOFF1 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XOFF1_REGISTER 0x06
+
+/* set XOFF2 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XOFF2_REGISTER 0x07
+
+#define MOXA_MUST_RBRTL_REGISTER 0x04
+#define MOXA_MUST_RBRTH_REGISTER 0x05
+#define MOXA_MUST_RBRTI_REGISTER 0x06
+#define MOXA_MUST_THRTL_REGISTER 0x07
+#define MOXA_MUST_ENUM_REGISTER 0x04
+#define MOXA_MUST_HWID_REGISTER 0x05
+#define MOXA_MUST_ECR_REGISTER 0x06
+#define MOXA_MUST_CSR_REGISTER 0x07
+
+#define MOXA_MUST_FCR_GDA_MODE_ENABLE 0x20 /* good data mode enable */
+#define MOXA_MUST_FCR_GDA_ONLY_ENABLE 0x10 /* only good data put into RxFIFO */
+
+#define MOXA_MUST_IER_ECTSI 0x80 /* enable CTS interrupt */
+#define MOXA_MUST_IER_ERTSI 0x40 /* enable RTS interrupt */
+#define MOXA_MUST_IER_XINT 0x20 /* enable Xon/Xoff interrupt */
+#define MOXA_MUST_IER_EGDAI 0x10 /* enable GDA interrupt */
+
+#define MOXA_MUST_RECV_ISR (UART_IER_RDI | MOXA_MUST_IER_EGDAI)
+
+/* GDA interrupt pending */
+#define MOXA_MUST_IIR_GDA 0x1C
+#define MOXA_MUST_IIR_RDA 0x04
+#define MOXA_MUST_IIR_RTO 0x0C
+#define MOXA_MUST_IIR_LSR 0x06
+
+/* received Xon/Xoff or specical interrupt pending */
+#define MOXA_MUST_IIR_XSC 0x10
+
+/* RTS/CTS change state interrupt pending */
+#define MOXA_MUST_IIR_RTSCTS 0x20
+#define MOXA_MUST_IIR_MASK 0x3E
+
+#define MOXA_MUST_MCR_XON_FLAG 0x40
+#define MOXA_MUST_MCR_XON_ANY 0x80
+#define MOXA_MUST_MCR_TX_XON 0x08
+
+#define MOXA_MUST_EFR_SF_MASK 0x0F /* software flow control on chip mask value */
+#define MOXA_MUST_EFR_SF_TX1 0x08 /* send Xon1/Xoff1 */
+#define MOXA_MUST_EFR_SF_TX2 0x04 /* send Xon2/Xoff2 */
+#define MOXA_MUST_EFR_SF_TX12 0x0C /* send Xon1,Xon2/Xoff1,Xoff2 */
+#define MOXA_MUST_EFR_SF_TX_NO 0x00 /* don't send Xon/Xoff */
+#define MOXA_MUST_EFR_SF_TX_MASK 0x0C /* Tx software flow control mask */
+#define MOXA_MUST_EFR_SF_RX_NO 0x00 /* don't receive Xon/Xoff */
+#define MOXA_MUST_EFR_SF_RX1 0x02 /* receive Xon1/Xoff1 */
+#define MOXA_MUST_EFR_SF_RX2 0x01 /* receive Xon2/Xoff2 */
+#define MOXA_MUST_EFR_SF_RX12 0x03 /* receive Xon1,Xon2/Xoff1,Xoff2 */
+#define MOXA_MUST_EFR_SF_RX_MASK 0x03 /* Rx software flow control mask */
-#define MXSER_VERSION "2.0.5" /* 1.14 */
#define MXSERMAJOR 174
#define MXSER_BOARDS 4 /* Max. boards */
@@ -51,170 +154,103 @@
#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
#define MXSER_ISR_PASS_LIMIT 100
-/*CheckIsMoxaMust return value*/
-#define MOXA_OTHER_UART 0x00
-#define MOXA_MUST_MU150_HWID 0x01
-#define MOXA_MUST_MU860_HWID 0x02
-
#define WAKEUP_CHARS 256
-#define UART_MCR_AFE 0x20
-#define UART_LSR_SPECIAL 0x1E
-
-#define PCI_DEVICE_ID_POS104UL 0x1044
-#define PCI_DEVICE_ID_CB108 0x1080
-#define PCI_DEVICE_ID_CP102UF 0x1023
-#define PCI_DEVICE_ID_CP112UL 0x1120
-#define PCI_DEVICE_ID_CB114 0x1142
-#define PCI_DEVICE_ID_CP114UL 0x1143
-#define PCI_DEVICE_ID_CB134I 0x1341
-#define PCI_DEVICE_ID_CP138U 0x1380
-
-
-#define C168_ASIC_ID 1
-#define C104_ASIC_ID 2
-#define C102_ASIC_ID 0xB
-#define CI132_ASIC_ID 4
-#define CI134_ASIC_ID 3
-#define CI104J_ASIC_ID 5
-
-#define MXSER_HIGHBAUD 1
-#define MXSER_HAS2 2
+#define MXSER_BAUD_BASE 921600
+#define MXSER_CUSTOM_DIVISOR (MXSER_BAUD_BASE * 16)
+
+#define PCI_DEVICE_ID_MOXA_RC7000 0x0001
+#define PCI_DEVICE_ID_MOXA_CP102 0x1020
+#define PCI_DEVICE_ID_MOXA_CP102UL 0x1021
+#define PCI_DEVICE_ID_MOXA_CP102U 0x1022
+#define PCI_DEVICE_ID_MOXA_CP102UF 0x1023
+#define PCI_DEVICE_ID_MOXA_C104 0x1040
+#define PCI_DEVICE_ID_MOXA_CP104U 0x1041
+#define PCI_DEVICE_ID_MOXA_CP104JU 0x1042
+#define PCI_DEVICE_ID_MOXA_CP104EL 0x1043
+#define PCI_DEVICE_ID_MOXA_POS104UL 0x1044
+#define PCI_DEVICE_ID_MOXA_CB108 0x1080
+#define PCI_DEVICE_ID_MOXA_CP112UL 0x1120
+#define PCI_DEVICE_ID_MOXA_CT114 0x1140
+#define PCI_DEVICE_ID_MOXA_CP114 0x1141
+#define PCI_DEVICE_ID_MOXA_CB114 0x1142
+#define PCI_DEVICE_ID_MOXA_CP114UL 0x1143
+#define PCI_DEVICE_ID_MOXA_CP118U 0x1180
+#define PCI_DEVICE_ID_MOXA_CP118EL 0x1181
+#define PCI_DEVICE_ID_MOXA_CP132 0x1320
+#define PCI_DEVICE_ID_MOXA_CP132U 0x1321
+#define PCI_DEVICE_ID_MOXA_CP134U 0x1340
+#define PCI_DEVICE_ID_MOXA_CB134I 0x1341
+#define PCI_DEVICE_ID_MOXA_CP138U 0x1380
+#define PCI_DEVICE_ID_MOXA_C168 0x1680
+#define PCI_DEVICE_ID_MOXA_CP168U 0x1681
+#define PCI_DEVICE_ID_MOXA_CP168EL 0x1682
+
+#define MXSER_NPORTS(ddata) ((ddata) & 0xffU)
+#define MXSER_HIGHBAUD 0x0100
+
+enum mxser_must_hwid {
+ MOXA_OTHER_UART = 0x00,
+ MOXA_MUST_MU150_HWID = 0x01,
+ MOXA_MUST_MU860_HWID = 0x02,
+};
-/* This is only for PCI */
static const struct {
- int type;
- int tx_fifo;
- int rx_fifo;
- int xmit_fifo_size;
- int rx_high_water;
- int rx_trigger;
- int rx_low_water;
- long max_baud;
+ u8 type;
+ u8 fifo_size;
+ u8 rx_high_water;
+ u8 rx_low_water;
+ speed_t max_baud;
} Gpci_uart_info[] = {
- {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
- {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
- {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
+ { MOXA_OTHER_UART, 16, 14, 1, 921600 },
+ { MOXA_MUST_MU150_HWID, 64, 48, 16, 230400 },
+ { MOXA_MUST_MU860_HWID, 128, 96, 32, 921600 }
};
#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
-struct mxser_cardinfo {
- char *name;
- unsigned int nports;
- unsigned int flags;
-};
-
-static const struct mxser_cardinfo mxser_cards[] = {
-/* 0*/ { "C168 series", 8, },
- { "C104 series", 4, },
- { "CI-104J series", 4, },
- { "C168H/PCI series", 8, },
- { "C104H/PCI series", 4, },
-/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
- { "CI-132 series", 4, MXSER_HAS2 },
- { "CI-134 series", 4, },
- { "CP-132 series", 2, },
- { "CP-114 series", 4, },
-/*10*/ { "CT-114 series", 4, },
- { "CP-102 series", 2, MXSER_HIGHBAUD },
- { "CP-104U series", 4, },
- { "CP-168U series", 8, },
- { "CP-132U series", 2, },
-/*15*/ { "CP-134U series", 4, },
- { "CP-104JU series", 4, },
- { "Moxa UC7000 Serial", 8, }, /* RC7000 */
- { "CP-118U series", 8, },
- { "CP-102UL series", 2, },
-/*20*/ { "CP-102U series", 2, },
- { "CP-118EL series", 8, },
- { "CP-168EL series", 8, },
- { "CP-104EL series", 4, },
- { "CB-108 series", 8, },
-/*25*/ { "CB-114 series", 4, },
- { "CB-134I series", 4, },
- { "CP-138U series", 8, },
- { "POS-104UL series", 4, },
- { "CP-114UL series", 4, },
-/*30*/ { "CP-102UF series", 2, },
- { "CP-112UL series", 2, },
-};
/* driver_data correspond to the lines in the structure above
see also ISA probe function before you change something */
static const struct pci_device_id mxser_pcibrds[] = {
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
+ { PCI_DEVICE_DATA(MOXA, C168, 8) },
+ { PCI_DEVICE_DATA(MOXA, C104, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP132, 2) },
+ { PCI_DEVICE_DATA(MOXA, CP114, 4) },
+ { PCI_DEVICE_DATA(MOXA, CT114, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP102, 2 | MXSER_HIGHBAUD) },
+ { PCI_DEVICE_DATA(MOXA, CP104U, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP168U, 8) },
+ { PCI_DEVICE_DATA(MOXA, CP132U, 2) },
+ { PCI_DEVICE_DATA(MOXA, CP134U, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP104JU, 4) },
+ { PCI_DEVICE_DATA(MOXA, RC7000, 8) }, /* RC7000 */
+ { PCI_DEVICE_DATA(MOXA, CP118U, 8) },
+ { PCI_DEVICE_DATA(MOXA, CP102UL, 2) },
+ { PCI_DEVICE_DATA(MOXA, CP102U, 2) },
+ { PCI_DEVICE_DATA(MOXA, CP118EL, 8) },
+ { PCI_DEVICE_DATA(MOXA, CP168EL, 8) },
+ { PCI_DEVICE_DATA(MOXA, CP104EL, 4) },
+ { PCI_DEVICE_DATA(MOXA, CB108, 8) },
+ { PCI_DEVICE_DATA(MOXA, CB114, 4) },
+ { PCI_DEVICE_DATA(MOXA, CB134I, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP138U, 8) },
+ { PCI_DEVICE_DATA(MOXA, POS104UL, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP114UL, 4) },
+ { PCI_DEVICE_DATA(MOXA, CP102UF, 2) },
+ { PCI_DEVICE_DATA(MOXA, CP112UL, 2) },
{ }
};
MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
-static unsigned long ioaddr[MXSER_BOARDS];
static int ttymajor = MXSERMAJOR;
/* Variables for insmod */
MODULE_AUTHOR("Casper Yang");
MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
-module_param_hw_array(ioaddr, ulong, ioport, NULL, 0);
-MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
module_param(ttymajor, int, 0);
MODULE_LICENSE("GPL");
-struct mxser_log {
- int tick;
- unsigned long rxcnt[MXSER_PORTS];
- unsigned long txcnt[MXSER_PORTS];
-};
-
-struct mxser_mon {
- unsigned long rxcnt;
- unsigned long txcnt;
- unsigned long up_rxcnt;
- unsigned long up_txcnt;
- int modem_status;
- unsigned char hold_reason;
-};
-
-struct mxser_mon_ext {
- unsigned long rx_cnt[32];
- unsigned long tx_cnt[32];
- unsigned long up_rxcnt[32];
- unsigned long up_txcnt[32];
- int modem_status[32];
-
- long baudrate[32];
- int databits[32];
- int stopbits[32];
- int parity[32];
- int flowctrl[32];
- int fifo[32];
- int iftype[32];
-};
-
struct mxser_board;
struct mxser_port {
@@ -223,325 +259,203 @@ struct mxser_port {
unsigned long ioaddr;
unsigned long opmode_ioaddr;
- int max_baud;
- int rx_high_water;
- int rx_trigger; /* Rx fifo trigger level */
- int rx_low_water;
- int baud_base; /* max. speed */
+ u8 rx_high_water;
+ u8 rx_low_water;
int type; /* UART type */
- int x_char; /* xon/xoff character */
- int IER; /* Interrupt Enable Register */
- int MCR; /* Modem control register */
-
- unsigned char stop_rx;
- unsigned char ldisc_stop_rx;
-
- int custom_divisor;
- unsigned char err_shadow;
+ unsigned char x_char; /* xon/xoff character */
+ u8 IER; /* Interrupt Enable Register */
+ u8 MCR; /* Modem control register */
+ u8 FCR; /* FIFO control register */
struct async_icount icount; /* kernel counters for 4 input interrupts */
unsigned int timeout;
- int read_status_mask;
- int ignore_status_mask;
- unsigned int xmit_fifo_size;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
- int closing;
-
- struct ktermios normal_termios;
-
- struct mxser_mon mon_data;
+ u8 read_status_mask;
+ u8 ignore_status_mask;
+ u8 xmit_fifo_size;
spinlock_t slock;
};
struct mxser_board {
unsigned int idx;
+ unsigned short nports;
int irq;
- const struct mxser_cardinfo *info;
unsigned long vector;
- unsigned long vector_mask;
- int chip_flag;
- int uart_type;
-
- struct mxser_port ports[MXSER_PORTS_PER_BOARD];
-};
+ enum mxser_must_hwid must_hwid;
+ speed_t max_baud;
-struct mxser_mstatus {
- tcflag_t cflag;
- int cts;
- int dsr;
- int ri;
- int dcd;
+ struct mxser_port ports[];
};
-static struct mxser_board mxser_boards[MXSER_BOARDS];
+static DECLARE_BITMAP(mxser_boards, MXSER_BOARDS);
static struct tty_driver *mxvar_sdriver;
-static struct mxser_log mxvar_log;
-static int mxser_set_baud_method[MXSER_PORTS + 1];
-static void mxser_enable_must_enchance_mode(unsigned long baseio)
+static u8 __mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set,
+ bool restore_LCR)
{
- u8 oldlcr;
- u8 efr;
+ u8 oldlcr, efr;
oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENHANCED, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr |= MOXA_MUST_EFR_EFRB_ENABLE;
+ efr &= ~clear;
+ efr |= set;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-#ifdef CONFIG_PCI
-static void mxser_disable_must_enchance_mode(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
+ if (restore_LCR)
+ outb(oldlcr, baseio + UART_LCR);
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
+ return oldlcr;
+}
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+static u8 mxser_must_select_bank(unsigned long baseio, u8 bank)
+{
+ return __mxser_must_set_EFR(baseio, MOXA_MUST_EFR_BANK_MASK, bank,
+ false);
}
-#endif
static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK0;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK0);
outb(value, baseio + MOXA_MUST_XON1_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK0;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK0);
outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_set_must_fifo_value(struct mxser_port *info)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(info->ioaddr + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
-
- efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK1;
-
- outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
- outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
- outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
- outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
+ u8 oldlcr = mxser_must_select_bank(info->ioaddr, MOXA_MUST_EFR_BANK1);
+ outb(info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
+ outb(info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
+ outb(info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
outb(oldlcr, info->ioaddr + UART_LCR);
}
static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK2;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK2);
outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
-#ifdef CONFIG_PCI
-static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
+static u8 mxser_get_must_hardware_id(unsigned long baseio)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK2;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
+ u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK2);
+ u8 id = inb(baseio + MOXA_MUST_HWID_REGISTER);
outb(oldlcr, baseio + UART_LCR);
+
+ return id;
}
-#endif
-static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
+static void mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+ __mxser_must_set_EFR(baseio, clear, set, true);
}
-static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
+static void mxser_must_set_enhance_mode(unsigned long baseio, bool enable)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
- efr |= MOXA_MUST_EFR_SF_TX1;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+ mxser_must_set_EFR(baseio,
+ enable ? 0 : MOXA_MUST_EFR_EFRB_ENABLE,
+ enable ? MOXA_MUST_EFR_EFRB_ENABLE : 0);
}
-static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
+static void mxser_must_no_sw_flow_control(unsigned long baseio)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+ mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_MASK, 0);
}
-static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
+static void mxser_must_set_tx_sw_flow_control(unsigned long baseio, bool enable)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
- efr |= MOXA_MUST_EFR_SF_RX1;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+ mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_TX_MASK,
+ enable ? MOXA_MUST_EFR_SF_TX1 : 0);
}
-static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
+static void mxser_must_set_rx_sw_flow_control(unsigned long baseio, bool enable)
{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
+ mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_RX_MASK,
+ enable ? MOXA_MUST_EFR_SF_RX1 : 0);
}
-#ifdef CONFIG_PCI
-static int CheckIsMoxaMust(unsigned long io)
+static enum mxser_must_hwid mxser_must_get_hwid(unsigned long io)
{
u8 oldmcr, hwid;
int i;
outb(0, io + UART_LCR);
- mxser_disable_must_enchance_mode(io);
+ mxser_must_set_enhance_mode(io, false);
oldmcr = inb(io + UART_MCR);
outb(0, io + UART_MCR);
mxser_set_must_xon1_value(io, 0x11);
- if ((hwid = inb(io + UART_MCR)) != 0) {
+ if (inb(io + UART_MCR) != 0) {
outb(oldmcr, io + UART_MCR);
return MOXA_OTHER_UART;
}
- mxser_get_must_hardware_id(io, &hwid);
- for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
+ hwid = mxser_get_must_hardware_id(io);
+ for (i = 1; i < UART_INFO_NUM; i++) /* 0 = OTHER_UART */
if (hwid == Gpci_uart_info[i].type)
- return (int)hwid;
- }
+ return hwid;
+
return MOXA_OTHER_UART;
}
-#endif
-static void process_txrx_fifo(struct mxser_port *info)
+static bool mxser_16550A_or_MUST(struct mxser_port *info)
{
- int i;
+ return info->type == PORT_16550A || info->board->must_hwid;
+}
- if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
- info->rx_trigger = 1;
+static void mxser_process_txrx_fifo(struct mxser_port *info)
+{
+ unsigned int i;
+
+ if (info->type == PORT_16450 || info->type == PORT_8250) {
info->rx_high_water = 1;
info->rx_low_water = 1;
info->xmit_fifo_size = 1;
- } else
- for (i = 0; i < UART_INFO_NUM; i++)
- if (info->board->chip_flag == Gpci_uart_info[i].type) {
- info->rx_trigger = Gpci_uart_info[i].rx_trigger;
- info->rx_low_water = Gpci_uart_info[i].rx_low_water;
- info->rx_high_water = Gpci_uart_info[i].rx_high_water;
- info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
- break;
- }
+ return;
+ }
+
+ for (i = 0; i < UART_INFO_NUM; i++)
+ if (info->board->must_hwid == Gpci_uart_info[i].type) {
+ info->rx_low_water = Gpci_uart_info[i].rx_low_water;
+ info->rx_high_water = Gpci_uart_info[i].rx_high_water;
+ info->xmit_fifo_size = Gpci_uart_info[i].fifo_size;
+ break;
+ }
}
-static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
+static void __mxser_start_tx(struct mxser_port *info)
{
- static unsigned char mxser_msr[MXSER_PORTS + 1];
- unsigned char status = 0;
+ outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+}
- status = inb(baseaddr + UART_MSR);
+static void mxser_start_tx(struct mxser_port *info)
+{
+ unsigned long flags;
- mxser_msr[port] &= 0x0F;
- mxser_msr[port] |= status;
- status = mxser_msr[port];
- if (mode)
- mxser_msr[port] = 0;
+ spin_lock_irqsave(&info->slock, flags);
+ __mxser_start_tx(info);
+ spin_unlock_irqrestore(&info->slock, flags);
+}
- return status;
+static void __mxser_stop_tx(struct mxser_port *info)
+{
+ info->IER &= ~UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
}
static int mxser_carrier_raised(struct tty_port *port)
@@ -554,38 +468,36 @@ static void mxser_dtr_rts(struct tty_port *port, int on)
{
struct mxser_port *mp = container_of(port, struct mxser_port, port);
unsigned long flags;
+ u8 mcr;
spin_lock_irqsave(&mp->slock, flags);
+ mcr = inb(mp->ioaddr + UART_MCR);
if (on)
- outb(inb(mp->ioaddr + UART_MCR) |
- UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+ mcr |= UART_MCR_DTR | UART_MCR_RTS;
else
- outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
- mp->ioaddr + UART_MCR);
+ mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
+ outb(mcr, mp->ioaddr + UART_MCR);
spin_unlock_irqrestore(&mp->slock, flags);
}
-static int mxser_set_baud(struct tty_struct *tty, long newspd)
+static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
{
struct mxser_port *info = tty->driver_data;
unsigned int quot = 0, baud;
unsigned char cval;
u64 timeout;
- if (!info->ioaddr)
- return -1;
-
- if (newspd > info->max_baud)
+ if (newspd > info->board->max_baud)
return -1;
if (newspd == 134) {
- quot = 2 * info->baud_base / 269;
+ quot = 2 * MXSER_BAUD_BASE / 269;
tty_encode_baud_rate(tty, 134, 134);
} else if (newspd) {
- quot = info->baud_base / newspd;
+ quot = MXSER_BAUD_BASE / newspd;
if (quot == 0)
quot = 1;
- baud = info->baud_base/quot;
+ baud = MXSER_BAUD_BASE / quot;
tty_encode_baud_rate(tty, baud, baud);
} else {
quot = 0;
@@ -596,7 +508,7 @@ static int mxser_set_baud(struct tty_struct *tty, long newspd)
* u64 domain
*/
timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot;
- do_div(timeout, info->baud_base);
+ do_div(timeout, MXSER_BAUD_BASE);
info->timeout = timeout + HZ / 50; /* Add .02 seconds of slop */
if (quot) {
@@ -616,9 +528,8 @@ static int mxser_set_baud(struct tty_struct *tty, long newspd)
outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
-#ifdef BOTHER
if (C_BAUD(tty) == BOTHER) {
- quot = info->baud_base % newspd;
+ quot = MXSER_BAUD_BASE % newspd;
quot *= 8;
if (quot % newspd > newspd / 2) {
quot /= newspd;
@@ -627,51 +538,60 @@ static int mxser_set_baud(struct tty_struct *tty, long newspd)
quot /= newspd;
mxser_set_must_enum_value(info->ioaddr, quot);
- } else
-#endif
+ } else {
mxser_set_must_enum_value(info->ioaddr, 0);
+ }
return 0;
}
+static void mxser_handle_cts(struct tty_struct *tty, struct mxser_port *info,
+ u8 msr)
+{
+ bool cts = msr & UART_MSR_CTS;
+
+ if (tty->hw_stopped) {
+ if (cts) {
+ tty->hw_stopped = 0;
+
+ if (!mxser_16550A_or_MUST(info))
+ __mxser_start_tx(info);
+ tty_wakeup(tty);
+ }
+ return;
+ } else if (cts)
+ return;
+
+ tty->hw_stopped = 1;
+ if (!mxser_16550A_or_MUST(info))
+ __mxser_stop_tx(info);
+}
+
/*
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
-static int mxser_change_speed(struct tty_struct *tty)
+static void mxser_change_speed(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
- unsigned cflag, cval, fcr;
- int ret = 0;
- unsigned char status;
+ unsigned cflag, cval;
cflag = tty->termios.c_cflag;
- if (!info->ioaddr)
- return ret;
- if (mxser_set_baud_method[tty->index] == 0)
- mxser_set_baud(tty, tty_get_baud_rate(tty));
+ if (mxser_set_baud(tty, tty_get_baud_rate(tty))) {
+ /* Use previous rate on a failure */
+ if (old_termios) {
+ speed_t baud = tty_termios_baud_rate(old_termios);
+ tty_encode_baud_rate(tty, baud, baud);
+ }
+ }
/* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- cval = 0x00;
- break;
- case CS6:
- cval = 0x01;
- break;
- case CS7:
- cval = 0x02;
- break;
- case CS8:
- cval = 0x03;
- break;
- default:
- cval = 0x00;
- break; /* too keep GCC shut... */
- }
+ cval = UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag));
+
if (cflag & CSTOPB)
- cval |= 0x04;
+ cval |= UART_LCR_STOP;
if (cflag & PARENB)
cval |= UART_LCR_PARITY;
if (!(cflag & PARODD))
@@ -679,33 +599,26 @@ static int mxser_change_speed(struct tty_struct *tty)
if (cflag & CMSPAR)
cval |= UART_LCR_SPAR;
- if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
- if (info->board->chip_flag) {
- fcr = UART_FCR_ENABLE_FIFO;
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else
- fcr = 0;
- } else {
- fcr = UART_FCR_ENABLE_FIFO;
- if (info->board->chip_flag) {
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else {
- switch (info->rx_trigger) {
- case 1:
- fcr |= UART_FCR_TRIGGER_1;
- break;
- case 4:
- fcr |= UART_FCR_TRIGGER_4;
- break;
- case 8:
- fcr |= UART_FCR_TRIGGER_8;
- break;
- default:
- fcr |= UART_FCR_TRIGGER_14;
- break;
- }
+ info->FCR = 0;
+ if (info->board->must_hwid) {
+ info->FCR |= UART_FCR_ENABLE_FIFO |
+ MOXA_MUST_FCR_GDA_MODE_ENABLE;
+ mxser_set_must_fifo_value(info);
+ } else if (info->type != PORT_8250 && info->type != PORT_16450) {
+ info->FCR |= UART_FCR_ENABLE_FIFO;
+ switch (info->rx_high_water) {
+ case 1:
+ info->FCR |= UART_FCR_TRIGGER_1;
+ break;
+ case 4:
+ info->FCR |= UART_FCR_TRIGGER_4;
+ break;
+ case 8:
+ info->FCR |= UART_FCR_TRIGGER_8;
+ break;
+ default:
+ info->FCR |= UART_FCR_TRIGGER_14;
+ break;
}
}
@@ -715,35 +628,11 @@ static int mxser_change_speed(struct tty_struct *tty)
tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
if (cflag & CRTSCTS) {
info->IER |= UART_IER_MSI;
- if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
+ if (mxser_16550A_or_MUST(info)) {
info->MCR |= UART_MCR_AFE;
} else {
- status = inb(info->ioaddr + UART_MSR);
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
- if (info->type != PORT_16550A &&
- !info->board->chip_flag) {
- outb(info->IER & ~UART_IER_THRI,
- info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if ((info->type != PORT_16550A) &&
- (!info->board->chip_flag)) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- }
- }
+ mxser_handle_cts(tty, info,
+ inb(info->ioaddr + UART_MSR));
}
}
outb(info->MCR, info->ioaddr + UART_MCR);
@@ -781,112 +670,82 @@ static int mxser_change_speed(struct tty_struct *tty)
UART_LSR_FE;
}
}
- if (info->board->chip_flag) {
+ if (info->board->must_hwid) {
mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
- if (I_IXON(tty)) {
- mxser_enable_must_rx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
- }
- if (I_IXOFF(tty)) {
- mxser_enable_must_tx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_tx_software_flow_control(
- info->ioaddr);
- }
+ mxser_must_set_rx_sw_flow_control(info->ioaddr, I_IXON(tty));
+ mxser_must_set_tx_sw_flow_control(info->ioaddr, I_IXOFF(tty));
}
- outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
+ outb(info->FCR, info->ioaddr + UART_FCR);
outb(cval, info->ioaddr + UART_LCR);
-
- return ret;
}
-static void mxser_check_modem_status(struct tty_struct *tty,
- struct mxser_port *port, int status)
+static u8 mxser_check_modem_status(struct tty_struct *tty,
+ struct mxser_port *port)
{
+ u8 msr = inb(port->ioaddr + UART_MSR);
+
+ if (!(msr & UART_MSR_ANY_DELTA))
+ return msr;
+
/* update input line counters */
- if (status & UART_MSR_TERI)
+ if (msr & UART_MSR_TERI)
port->icount.rng++;
- if (status & UART_MSR_DDSR)
+ if (msr & UART_MSR_DDSR)
port->icount.dsr++;
- if (status & UART_MSR_DDCD)
+ if (msr & UART_MSR_DDCD)
port->icount.dcd++;
- if (status & UART_MSR_DCTS)
+ if (msr & UART_MSR_DCTS)
port->icount.cts++;
- port->mon_data.modem_status = status;
wake_up_interruptible(&port->port.delta_msr_wait);
- if (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) {
- if (status & UART_MSR_DCD)
+ if (tty_port_check_carrier(&port->port) && (msr & UART_MSR_DDCD)) {
+ if (msr & UART_MSR_DCD)
wake_up_interruptible(&port->port.open_wait);
}
- if (tty_port_cts_enabled(&port->port)) {
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
-
- if ((port->type != PORT_16550A) &&
- (!port->board->chip_flag)) {
- outb(port->IER & ~UART_IER_THRI,
- port->ioaddr + UART_IER);
- port->IER |= UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if (port->type != PORT_16550A &&
- !port->board->chip_flag) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- }
- }
- }
+ if (tty_port_cts_enabled(&port->port))
+ mxser_handle_cts(tty, port, msr);
+
+ return msr;
+}
+
+static void mxser_disable_and_clear_FIFO(struct mxser_port *info)
+{
+ u8 fcr = UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
+
+ if (info->board->must_hwid)
+ fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
+
+ outb(fcr, info->ioaddr + UART_FCR);
}
static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
{
struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long page;
unsigned long flags;
+ int ret;
- page = __get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
+ ret = tty_port_alloc_xmit_buf(port);
+ if (ret < 0)
+ return ret;
spin_lock_irqsave(&info->slock, flags);
- if (!info->ioaddr || !info->type) {
+ if (!info->type) {
set_bit(TTY_IO_ERROR, &tty->flags);
- free_page(page);
spin_unlock_irqrestore(&info->slock, flags);
- return 0;
+ ret = 0;
+ goto err_free_xmit;
}
- info->port.xmit_buf = (unsigned char *) page;
/*
* Clear the FIFO buffers and disable them
* (they will be reenabled in mxser_change_speed())
*/
- if (info->board->chip_flag)
- outb((UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
- else
- outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->ioaddr + UART_FCR);
+ mxser_disable_and_clear_FIFO(info);
/*
* At this point there's no way the LSR could still be 0xFF;
@@ -898,8 +757,10 @@ static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
if (capable(CAP_SYS_ADMIN)) {
set_bit(TTY_IO_ERROR, &tty->flags);
return 0;
- } else
- return -ENODEV;
+ }
+
+ ret = -ENODEV;
+ goto err_free_xmit;
}
/*
@@ -922,7 +783,7 @@ static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
*/
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
- if (info->board->chip_flag)
+ if (info->board->must_hwid)
info->IER |= MOXA_MUST_IER_EGDAI;
outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
@@ -935,15 +796,32 @@ static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
(void) inb(info->ioaddr + UART_MSR);
clear_bit(TTY_IO_ERROR, &tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ kfifo_reset(&port->xmit_fifo);
/*
* and set the speed of the serial port
*/
- mxser_change_speed(tty);
+ mxser_change_speed(tty, NULL);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
+err_free_xmit:
+ tty_port_free_xmit_buf(port);
+ return ret;
+}
+
+/*
+ * To stop accepting input, we disable the receive line status interrupts, and
+ * tell the interrupt driver to stop checking the data ready bit in the line
+ * status register.
+ */
+static void mxser_stop_rx(struct mxser_port *info)
+{
+ info->IER &= ~UART_IER_RLSI;
+ if (info->board->must_hwid)
+ info->IER &= ~MOXA_MUST_RECV_ISR;
+
+ outb(info->IER, info->ioaddr + UART_IER);
}
/*
@@ -956,40 +834,33 @@ static void mxser_shutdown_port(struct tty_port *port)
spin_lock_irqsave(&info->slock, flags);
+ mxser_stop_rx(info);
+
/*
* clear delta_msr_wait queue to avoid mem leaks: we may free the irq
* here so the queue might never be waken up
*/
wake_up_interruptible(&info->port.delta_msr_wait);
- /*
- * Free the xmit buffer, if necessary
- */
- if (info->port.xmit_buf) {
- free_page((unsigned long) info->port.xmit_buf);
- info->port.xmit_buf = NULL;
- }
-
info->IER = 0;
outb(0x00, info->ioaddr + UART_IER);
/* clear Rx/Tx FIFO's */
- if (info->board->chip_flag)
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE,
- info->ioaddr + UART_FCR);
- else
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
- info->ioaddr + UART_FCR);
+ mxser_disable_and_clear_FIFO(info);
/* read data port to reset things */
(void) inb(info->ioaddr + UART_RX);
- if (info->board->chip_flag)
- SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
+ if (info->board->must_hwid)
+ mxser_must_no_sw_flow_control(info->ioaddr);
spin_unlock_irqrestore(&info->slock, flags);
+
+ /* make sure ISR is not running while we free the buffer */
+ synchronize_irq(info->board->irq);
+
+ tty_port_free_xmit_buf(port);
}
/*
@@ -1000,205 +871,91 @@ static void mxser_shutdown_port(struct tty_port *port)
*/
static int mxser_open(struct tty_struct *tty, struct file *filp)
{
- struct mxser_port *info;
- int line;
+ struct tty_port *tport = tty->port;
+ struct mxser_port *port = container_of(tport, struct mxser_port, port);
- line = tty->index;
- if (line == MXSER_PORTS)
- return 0;
- info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
- if (!info->ioaddr)
- return -ENODEV;
+ tty->driver_data = port;
- tty->driver_data = info;
- return tty_port_open(&info->port, tty, filp);
+ return tty_port_open(tport, tty, filp);
}
static void mxser_flush_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- char fcr;
unsigned long flags;
-
spin_lock_irqsave(&info->slock, flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ kfifo_reset(&info->port.xmit_fifo);
- fcr = inb(info->ioaddr + UART_FCR);
- outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
+ outb(info->FCR | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
info->ioaddr + UART_FCR);
- outb(fcr, info->ioaddr + UART_FCR);
spin_unlock_irqrestore(&info->slock, flags);
tty_wakeup(tty);
}
-
-static void mxser_close_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long timeout;
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->IER &= ~UART_IER_RLSI;
- if (info->board->chip_flag)
- info->IER &= ~MOXA_MUST_RECV_ISR;
-
- outb(info->IER, info->ioaddr + UART_IER);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = jiffies + HZ;
- while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
- schedule_timeout_interruptible(5);
- if (time_after(jiffies, timeout))
- break;
- }
-}
-
-/*
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- */
static void mxser_close(struct tty_struct *tty, struct file *filp)
{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
-
- if (tty->index == MXSER_PORTS || info == NULL)
- return;
- if (tty_port_close_start(port, tty, filp) == 0)
- return;
- info->closing = 1;
- mutex_lock(&port->mutex);
- mxser_close_port(port);
- mxser_flush_buffer(tty);
- if (tty_port_initialized(port) && C_HUPCL(tty))
- tty_port_lower_dtr_rts(port);
- mxser_shutdown_port(port);
- tty_port_set_initialized(port, 0);
- mutex_unlock(&port->mutex);
- info->closing = 0;
- /* Right now the tty_port set is done outside of the close_end helper
- as we don't yet have everyone using refcounts */
- tty_port_close_end(port, tty);
- tty_port_tty_set(port, NULL);
+ tty_port_close(tty->port, tty, filp);
}
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
- int c, total = 0;
struct mxser_port *info = tty->driver_data;
unsigned long flags;
+ int written;
+ bool is_empty;
- if (!info->port.xmit_buf)
- return 0;
-
- while (1) {
- c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0)
- break;
-
- memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_head = (info->xmit_head + c) &
- (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- spin_unlock_irqrestore(&info->slock, flags);
+ spin_lock_irqsave(&info->slock, flags);
+ written = kfifo_in(&info->port.xmit_fifo, buf, count);
+ is_empty = kfifo_is_empty(&info->port.xmit_fifo);
+ spin_unlock_irqrestore(&info->slock, flags);
- buf += c;
- count -= c;
- total += c;
- }
+ if (!is_empty && !tty->flow.stopped)
+ if (!tty->hw_stopped || mxser_16550A_or_MUST(info))
+ mxser_start_tx(info);
- if (info->xmit_cnt && !tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- (info->board->chip_flag)) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return total;
+ return written;
}
static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
-
- if (!info->port.xmit_buf)
- return 0;
-
- if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
- return 0;
+ int ret;
spin_lock_irqsave(&info->slock, flags);
- info->port.xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE - 1;
- info->xmit_cnt++;
+ ret = kfifo_put(&info->port.xmit_fifo, ch);
spin_unlock_irqrestore(&info->slock, flags);
- if (!tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- info->board->chip_flag) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return 1;
+
+ return ret;
}
static void mxser_flush_chars(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- unsigned long flags;
- if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
- (tty->hw_stopped && info->type != PORT_16550A &&
- !info->board->chip_flag))
+ if (kfifo_is_empty(&info->port.xmit_fifo) || tty->flow.stopped ||
+ (tty->hw_stopped && !mxser_16550A_or_MUST(info)))
return;
- spin_lock_irqsave(&info->slock, flags);
-
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
-
- spin_unlock_irqrestore(&info->slock, flags);
+ mxser_start_tx(info);
}
-static int mxser_write_room(struct tty_struct *tty)
+static unsigned int mxser_write_room(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- int ret;
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- return ret < 0 ? 0 : ret;
+ return kfifo_avail(&info->port.xmit_fifo);
}
-static int mxser_chars_in_buffer(struct tty_struct *tty)
+static unsigned int mxser_chars_in_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- return info->xmit_cnt;
+
+ return kfifo_len(&info->port.xmit_fifo);
}
/*
@@ -1211,20 +968,24 @@ static int mxser_get_serial_info(struct tty_struct *tty,
{
struct mxser_port *info = tty->driver_data;
struct tty_port *port = &info->port;
-
- if (tty->index == MXSER_PORTS)
- return -ENOTTY;
+ unsigned int closing_wait, close_delay;
mutex_lock(&port->mutex);
- ss->type = info->type,
- ss->line = tty->index,
- ss->port = info->ioaddr,
- ss->irq = info->board->irq,
- ss->flags = info->port.flags,
- ss->baud_base = info->baud_base,
- ss->close_delay = info->port.close_delay,
- ss->closing_wait = info->port.closing_wait,
- ss->custom_divisor = info->custom_divisor,
+
+ close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
+ closing_wait = info->port.closing_wait;
+ if (closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ closing_wait = jiffies_to_msecs(closing_wait) / 10;
+
+ ss->type = info->type;
+ ss->line = tty->index;
+ ss->port = info->ioaddr;
+ ss->irq = info->board->irq;
+ ss->flags = info->port.flags;
+ ss->baud_base = MXSER_BAUD_BASE;
+ ss->close_delay = close_delay;
+ ss->closing_wait = closing_wait;
+ ss->custom_divisor = MXSER_CUSTOM_DIVISOR,
mutex_unlock(&port->mutex);
return 0;
}
@@ -1236,19 +997,13 @@ static int mxser_set_serial_info(struct tty_struct *tty,
struct tty_port *port = &info->port;
speed_t baud;
unsigned long sl_flags;
- unsigned int flags;
+ unsigned int old_speed, close_delay, closing_wait;
int retval = 0;
- if (tty->index == MXSER_PORTS)
- return -ENOTTY;
if (tty_io_error(tty))
return -EIO;
mutex_lock(&port->mutex);
- if (!info->ioaddr) {
- mutex_unlock(&port->mutex);
- return -ENODEV;
- }
if (ss->irq != info->board->irq ||
ss->port != info->ioaddr) {
@@ -1256,17 +1011,23 @@ static int mxser_set_serial_info(struct tty_struct *tty,
return -EINVAL;
}
- flags = port->flags & ASYNC_SPD_MASK;
+ old_speed = port->flags & ASYNC_SPD_MASK;
+
+ close_delay = msecs_to_jiffies(ss->close_delay * 10);
+ closing_wait = ss->closing_wait;
+ if (closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ closing_wait = msecs_to_jiffies(closing_wait * 10);
if (!capable(CAP_SYS_ADMIN)) {
- if ((ss->baud_base != info->baud_base) ||
- (ss->close_delay != info->port.close_delay) ||
- ((ss->flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) {
+ if ((ss->baud_base != MXSER_BAUD_BASE) ||
+ (close_delay != port->close_delay) ||
+ (closing_wait != port->closing_wait) ||
+ ((ss->flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) {
mutex_unlock(&port->mutex);
return -EPERM;
}
- info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
- (ss->flags & ASYNC_USR_MASK));
+ port->flags = (port->flags & ~ASYNC_USR_MASK) |
+ (ss->flags & ASYNC_USR_MASK);
} else {
/*
* OK, past this point, all the error checking has been done.
@@ -1274,13 +1035,12 @@ static int mxser_set_serial_info(struct tty_struct *tty,
*/
port->flags = ((port->flags & ~ASYNC_FLAGS) |
(ss->flags & ASYNC_FLAGS));
- port->close_delay = ss->close_delay * HZ / 100;
- port->closing_wait = ss->closing_wait * HZ / 100;
- port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ port->close_delay = close_delay;
+ port->closing_wait = closing_wait;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
- (ss->baud_base != info->baud_base ||
+ (ss->baud_base != MXSER_BAUD_BASE ||
ss->custom_divisor !=
- info->custom_divisor)) {
+ MXSER_CUSTOM_DIVISOR)) {
if (ss->custom_divisor == 0) {
mutex_unlock(&port->mutex);
return -EINVAL;
@@ -1288,16 +1048,16 @@ static int mxser_set_serial_info(struct tty_struct *tty,
baud = ss->baud_base / ss->custom_divisor;
tty_encode_baud_rate(tty, baud, baud);
}
- }
- info->type = ss->type;
+ info->type = ss->type;
- process_txrx_fifo(info);
+ mxser_process_txrx_fifo(info);
+ }
if (tty_port_initialized(port)) {
- if (flags != (port->flags & ASYNC_SPD_MASK)) {
+ if (old_speed != (port->flags & ASYNC_SPD_MASK)) {
spin_lock_irqsave(&info->slock, sl_flags);
- mxser_change_speed(tty);
+ mxser_change_speed(tty, NULL);
spin_unlock_irqrestore(&info->slock, sl_flags);
}
} else {
@@ -1336,28 +1096,24 @@ static int mxser_get_lsr_info(struct mxser_port *info,
static int mxser_tiocmget(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- unsigned char control, status;
+ unsigned char control;
unsigned long flags;
+ u8 msr;
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
if (tty_io_error(tty))
return -EIO;
- control = info->MCR;
-
spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_MSR);
- if (status & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, info, status);
+ control = info->MCR;
+ msr = mxser_check_modem_status(tty, info);
spin_unlock_irqrestore(&info->slock, flags);
+
return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
- ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
- ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
- ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
- ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
+ ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) |
+ ((msr & UART_MSR_RI) ? TIOCM_RNG : 0) |
+ ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0) |
+ ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0);
}
static int mxser_tiocmset(struct tty_struct *tty,
@@ -1366,9 +1122,6 @@ static int mxser_tiocmset(struct tty_struct *tty,
struct mxser_port *info = tty->driver_data;
unsigned long flags;
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
if (tty_io_error(tty))
return -EIO;
@@ -1389,267 +1142,6 @@ static int mxser_tiocmset(struct tty_struct *tty,
return 0;
}
-static int __init mxser_program_mode(int port)
-{
- int id, i, j, n;
-
- outb(0, port);
- outb(0, port);
- outb(0, port);
- (void)inb(port);
- (void)inb(port);
- outb(0, port);
- (void)inb(port);
-
- id = inb(port + 1) & 0x1F;
- if ((id != C168_ASIC_ID) &&
- (id != C104_ASIC_ID) &&
- (id != C102_ASIC_ID) &&
- (id != CI132_ASIC_ID) &&
- (id != CI134_ASIC_ID) &&
- (id != CI104J_ASIC_ID))
- return -1;
- for (i = 0, j = 0; i < 4; i++) {
- n = inb(port + 2);
- if (n == 'M') {
- j = 1;
- } else if ((j == 1) && (n == 1)) {
- j = 2;
- break;
- } else
- j = 0;
- }
- if (j != 2)
- id = -2;
- return id;
-}
-
-static void __init mxser_normal_mode(int port)
-{
- int i, n;
-
- outb(0xA5, port + 1);
- outb(0x80, port + 3);
- outb(12, port + 0); /* 9600 bps */
- outb(0, port + 1);
- outb(0x03, port + 3); /* 8 data bits */
- outb(0x13, port + 4); /* loop back mode */
- for (i = 0; i < 16; i++) {
- n = inb(port + 5);
- if ((n & 0x61) == 0x60)
- break;
- if ((n & 1) == 1)
- (void)inb(port);
- }
- outb(0x00, port + 4);
-}
-
-#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
-#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
-#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
-#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
-#define EN_CCMD 0x000 /* Chip's command register */
-#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
-#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
-#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
-#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
-#define EN0_DCFG 0x00E /* Data configuration reg WR */
-#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
-#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
-#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
-static int __init mxser_read_register(int port, unsigned short *regs)
-{
- int i, k, value, id;
- unsigned int j;
-
- id = mxser_program_mode(port);
- if (id < 0)
- return id;
- for (i = 0; i < 14; i++) {
- k = (i & 0x3F) | 0x180;
- for (j = 0x100; j > 0; j >>= 1) {
- outb(CHIP_CS, port);
- if (k & j) {
- outb(CHIP_CS | CHIP_DO, port);
- outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
- } else {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
- }
- }
- (void)inb(port);
- value = 0;
- for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port);
- if (inb(port) & CHIP_DI)
- value |= j;
- }
- regs[i] = value;
- outb(0, port);
- }
- mxser_normal_mode(port);
- return id;
-}
-
-static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
-{
- struct mxser_port *ip;
- struct tty_port *port;
- struct tty_struct *tty;
- int result, status;
- unsigned int i, j;
- int ret = 0;
-
- switch (cmd) {
- case MOXA_GET_MAJOR:
- printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
- "%x (GET_MAJOR), fix your userspace\n",
- current->comm, cmd);
- return put_user(ttymajor, (int __user *)argp);
-
- case MOXA_CHKPORTENABLE:
- result = 0;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
- if (mxser_boards[i].ports[j].ioaddr)
- result |= (1 << i);
- return put_user(result, (unsigned long __user *)argp);
- case MOXA_GETDATACOUNT:
- /* The receive side is locked by port->slock but it isn't
- clear that an exact snapshot is worth copying here */
- if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
- ret = -EFAULT;
- return ret;
- case MOXA_GETMSTATUS: {
- struct mxser_mstatus ms, __user *msu = argp;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
- memset(&ms, 0, sizeof(ms));
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr)
- goto copy;
-
- tty = tty_port_tty_get(port);
-
- if (!tty)
- ms.cflag = ip->normal_termios.c_cflag;
- else
- ms.cflag = tty->termios.c_cflag;
- tty_kref_put(tty);
- spin_lock_irq(&ip->slock);
- status = inb(ip->ioaddr + UART_MSR);
- spin_unlock_irq(&ip->slock);
- if (status & UART_MSR_DCD)
- ms.dcd = 1;
- if (status & UART_MSR_DSR)
- ms.dsr = 1;
- if (status & UART_MSR_CTS)
- ms.cts = 1;
- copy:
- mutex_unlock(&port->mutex);
- if (copy_to_user(msu, &ms, sizeof(ms)))
- return -EFAULT;
- msu++;
- }
- return 0;
- }
- case MOXA_ASPP_MON_EXT: {
- struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
- unsigned int cflag, iflag, p;
- u8 opmode;
-
- me = kzalloc(sizeof(*me), GFP_KERNEL);
- if (!me)
- return -ENOMEM;
-
- for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
- if (p >= ARRAY_SIZE(me->rx_cnt)) {
- i = MXSER_BOARDS;
- break;
- }
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr) {
- mutex_unlock(&port->mutex);
- continue;
- }
-
- spin_lock_irq(&ip->slock);
- status = mxser_get_msr(ip->ioaddr, 0, p);
-
- if (status & UART_MSR_TERI)
- ip->icount.rng++;
- if (status & UART_MSR_DDSR)
- ip->icount.dsr++;
- if (status & UART_MSR_DDCD)
- ip->icount.dcd++;
- if (status & UART_MSR_DCTS)
- ip->icount.cts++;
-
- ip->mon_data.modem_status = status;
- me->rx_cnt[p] = ip->mon_data.rxcnt;
- me->tx_cnt[p] = ip->mon_data.txcnt;
- me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
- me->up_txcnt[p] = ip->mon_data.up_txcnt;
- me->modem_status[p] =
- ip->mon_data.modem_status;
- spin_unlock_irq(&ip->slock);
-
- tty = tty_port_tty_get(&ip->port);
-
- if (!tty) {
- cflag = ip->normal_termios.c_cflag;
- iflag = ip->normal_termios.c_iflag;
- me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
- } else {
- cflag = tty->termios.c_cflag;
- iflag = tty->termios.c_iflag;
- me->baudrate[p] = tty_get_baud_rate(tty);
- }
- tty_kref_put(tty);
-
- me->databits[p] = cflag & CSIZE;
- me->stopbits[p] = cflag & CSTOPB;
- me->parity[p] = cflag & (PARENB | PARODD |
- CMSPAR);
-
- if (cflag & CRTSCTS)
- me->flowctrl[p] |= 0x03;
-
- if (iflag & (IXON | IXOFF))
- me->flowctrl[p] |= 0x0C;
-
- if (ip->type == PORT_16550A)
- me->fifo[p] = 1;
-
- if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
- opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
- opmode &= OP_MODE_MASK;
- } else {
- opmode = RS232_MODE;
- }
- me->iftype[p] = opmode;
- mutex_unlock(&port->mutex);
- }
- }
- if (copy_to_user(argp, me, sizeof(*me)))
- ret = -EFAULT;
- kfree(me);
- return ret;
- }
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
struct async_icount *cprev)
{
@@ -1671,6 +1163,41 @@ static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
return ret;
}
+/* We should likely switch to TIOCGRS485/TIOCSRS485. */
+static int mxser_ioctl_op_mode(struct mxser_port *port, int index, bool set,
+ int __user *u_opmode)
+{
+ int opmode, p = index % 4;
+ int shiftbit = p * 2;
+ u8 val;
+
+ if (port->board->must_hwid != MOXA_MUST_MU860_HWID)
+ return -EFAULT;
+
+ if (set) {
+ if (get_user(opmode, u_opmode))
+ return -EFAULT;
+
+ if (opmode & ~OP_MODE_MASK)
+ return -EINVAL;
+
+ spin_lock_irq(&port->slock);
+ val = inb(port->opmode_ioaddr);
+ val &= ~(OP_MODE_MASK << shiftbit);
+ val |= (opmode << shiftbit);
+ outb(val, port->opmode_ioaddr);
+ spin_unlock_irq(&port->slock);
+
+ return 0;
+ }
+
+ spin_lock_irq(&port->slock);
+ opmode = inb(port->opmode_ioaddr) >> shiftbit;
+ spin_unlock_irq(&port->slock);
+
+ return put_user(opmode & OP_MODE_MASK, u_opmode);
+}
+
static int mxser_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
@@ -1679,47 +1206,9 @@ static int mxser_ioctl(struct tty_struct *tty,
unsigned long flags;
void __user *argp = (void __user *)arg;
- if (tty->index == MXSER_PORTS)
- return mxser_ioctl_special(cmd, argp);
-
- if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
- int p;
- unsigned long opmode;
- static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
- int shiftbit;
- unsigned char val, mask;
-
- if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
- return -EFAULT;
-
- p = tty->index % 4;
- if (cmd == MOXA_SET_OP_MODE) {
- if (get_user(opmode, (int __user *) argp))
- return -EFAULT;
- if (opmode != RS232_MODE &&
- opmode != RS485_2WIRE_MODE &&
- opmode != RS422_MODE &&
- opmode != RS485_4WIRE_MODE)
- return -EFAULT;
- mask = ModeMask[p];
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- val = inb(info->opmode_ioaddr);
- val &= mask;
- val |= (opmode << shiftbit);
- outb(val, info->opmode_ioaddr);
- spin_unlock_irq(&info->slock);
- } else {
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- opmode = inb(info->opmode_ioaddr) >> shiftbit;
- spin_unlock_irq(&info->slock);
- opmode &= OP_MODE_MASK;
- if (put_user(opmode, (int __user *)argp))
- return -EFAULT;
- }
- return 0;
- }
+ if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE)
+ return mxser_ioctl_op_mode(info, tty->index,
+ cmd == MOXA_SET_OP_MODE, argp);
if (cmd != TIOCMIWAIT && tty_io_error(tty))
return -EIO;
@@ -1740,72 +1229,6 @@ static int mxser_ioctl(struct tty_struct *tty,
return wait_event_interruptible(info->port.delta_msr_wait,
mxser_cflags_changed(info, arg, &cnow));
- case MOXA_HighSpeedOn:
- return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
- case MOXA_SDS_RSTICOUNTER:
- spin_lock_irq(&info->slock);
- info->mon_data.rxcnt = 0;
- info->mon_data.txcnt = 0;
- spin_unlock_irq(&info->slock);
- return 0;
-
- case MOXA_ASPP_OQUEUE:{
- int len, lsr;
-
- len = mxser_chars_in_buffer(tty);
- spin_lock_irq(&info->slock);
- lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
- spin_unlock_irq(&info->slock);
- len += (lsr ? 0 : 1);
-
- return put_user(len, (int __user *)argp);
- }
- case MOXA_ASPP_MON: {
- int mcr, status;
-
- spin_lock_irq(&info->slock);
- status = mxser_get_msr(info->ioaddr, 1, tty->index);
- mxser_check_modem_status(tty, info, status);
-
- mcr = inb(info->ioaddr + UART_MCR);
- spin_unlock_irq(&info->slock);
-
- if (mcr & MOXA_MUST_MCR_XON_FLAG)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
-
- if (mcr & MOXA_MUST_MCR_TX_XON)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
-
- if (tty->hw_stopped)
- info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
- else
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
-
- if (copy_to_user(argp, &info->mon_data,
- sizeof(struct mxser_mon)))
- return -EFAULT;
-
- return 0;
- }
- case MOXA_ASPP_LSTATUS: {
- if (put_user(info->err_shadow, (unsigned char __user *)argp))
- return -EFAULT;
-
- info->err_shadow = 0;
- return 0;
- }
- case MOXA_SET_BAUD_METHOD: {
- int method;
-
- if (get_user(method, (int __user *)argp))
- return -EFAULT;
- mxser_set_baud_method[tty->index] = method;
- return put_user(method, (int __user *)argp);
- }
default:
return -ENOIOCTLCMD;
}
@@ -1845,13 +1268,16 @@ static int mxser_get_icount(struct tty_struct *tty,
return 0;
}
-static void mxser_stoprx(struct tty_struct *tty)
+/*
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ */
+static void mxser_throttle(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
- info->ldisc_stop_rx = 1;
if (I_IXOFF(tty)) {
- if (info->board->chip_flag) {
+ if (info->board->must_hwid) {
info->IER &= ~MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
@@ -1868,26 +1294,16 @@ static void mxser_stoprx(struct tty_struct *tty)
}
}
-/*
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- */
-static void mxser_throttle(struct tty_struct *tty)
-{
- mxser_stoprx(tty);
-}
-
static void mxser_unthrottle(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
/* startrx */
- info->ldisc_stop_rx = 0;
if (I_IXOFF(tty)) {
if (info->x_char)
info->x_char = 0;
else {
- if (info->board->chip_flag) {
+ if (info->board->must_hwid) {
info->IER |= MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
@@ -1908,7 +1324,7 @@ static void mxser_unthrottle(struct tty_struct *tty)
/*
* mxser_stop() and mxser_start()
*
- * This routines are called before setting or resetting tty->stopped.
+ * This routines are called before setting or resetting tty->flow.stopped.
* They enable or disable transmitter interrupts, as necessary.
*/
static void mxser_stop(struct tty_struct *tty)
@@ -1917,10 +1333,8 @@ static void mxser_stop(struct tty_struct *tty)
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
- if (info->IER & UART_IER_THRI) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
+ if (info->IER & UART_IER_THRI)
+ __mxser_stop_tx(info);
spin_unlock_irqrestore(&info->slock, flags);
}
@@ -1930,21 +1344,19 @@ static void mxser_start(struct tty_struct *tty)
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
- if (info->xmit_cnt && info->port.xmit_buf) {
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
+ if (!kfifo_is_empty(&info->port.xmit_fifo))
+ __mxser_start_tx(info);
spin_unlock_irqrestore(&info->slock, flags);
}
-static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void mxser_set_termios(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
- mxser_change_speed(tty);
+ mxser_change_speed(tty, old_termios);
spin_unlock_irqrestore(&info->slock, flags);
if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
@@ -1954,12 +1366,11 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi
/* Handle sw stopped */
if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
- tty->stopped = 0;
+ tty->flow.stopped = 0;
- if (info->board->chip_flag) {
+ if (info->board->must_hwid) {
spin_lock_irqsave(&info->slock, flags);
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
+ mxser_must_set_rx_sw_flow_control(info->ioaddr, false);
spin_unlock_irqrestore(&info->slock, flags);
}
@@ -1967,15 +1378,25 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi
}
}
+static bool mxser_tx_empty(struct mxser_port *info)
+{
+ unsigned long flags;
+ u8 lsr;
+
+ spin_lock_irqsave(&info->slock, flags);
+ lsr = inb(info->ioaddr + UART_LSR);
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ return !(lsr & UART_LSR_TEMT);
+}
+
/*
* mxser_wait_until_sent() --- wait until the transmitter is empty
*/
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct mxser_port *info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
- unsigned long flags;
- int lsr;
+ unsigned long expire, char_time;
if (info->type == PORT_UNKNOWN)
return;
@@ -1983,7 +1404,6 @@ static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
if (info->xmit_fifo_size == 0)
return; /* Just in case.... */
- orig_jiffies = jiffies;
/*
* 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
@@ -1998,6 +1418,9 @@ static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
char_time = 1;
if (timeout && timeout < char_time)
char_time = timeout;
+
+ char_time = jiffies_to_msecs(char_time);
+
/*
* If the transmitter hasn't cleared in twice the approximate
* amount of time to send the entire FIFO, it probably won't
@@ -2010,18 +1433,15 @@ static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
if (!timeout || timeout > 2 * info->timeout)
timeout = 2 * info->timeout;
- spin_lock_irqsave(&info->slock, flags);
- while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
- spin_unlock_irqrestore(&info->slock, flags);
- schedule_timeout_interruptible(char_time);
- spin_lock_irqsave(&info->slock, flags);
+ expire = jiffies + timeout;
+
+ while (mxser_tx_empty(info)) {
+ msleep_interruptible(char_time);
if (signal_pending(current))
break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ if (time_after(jiffies, expire))
break;
}
- spin_unlock_irqrestore(&info->slock, flags);
- set_current_state(TASK_RUNNING);
}
/*
@@ -2042,168 +1462,194 @@ static int mxser_rs_break(struct tty_struct *tty, int break_state)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
+ u8 lcr;
spin_lock_irqsave(&info->slock, flags);
+ lcr = inb(info->ioaddr + UART_LCR);
if (break_state == -1)
- outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
- info->ioaddr + UART_LCR);
+ lcr |= UART_LCR_SBC;
else
- outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
- info->ioaddr + UART_LCR);
+ lcr &= ~UART_LCR_SBC;
+ outb(lcr, info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
+
return 0;
}
-static void mxser_receive_chars(struct tty_struct *tty,
- struct mxser_port *port, int *status)
+static bool mxser_receive_chars_new(struct mxser_port *port, u8 status)
{
- unsigned char ch, gdl;
- int ignored = 0;
- int cnt = 0;
- int recv_room;
- int max = 256;
+ enum mxser_must_hwid hwid = port->board->must_hwid;
+ u8 gdl;
- recv_room = tty->receive_room;
- if (recv_room == 0 && !port->ldisc_stop_rx)
- mxser_stoprx(tty);
- if (port->board->chip_flag != MOXA_OTHER_UART) {
-
- if (*status & UART_LSR_SPECIAL)
- goto intr_old;
- if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
- (*status & MOXA_MUST_LSR_RERR))
- goto intr_old;
- if (*status & MOXA_MUST_LSR_RERR)
- goto intr_old;
-
- gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
-
- if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
- gdl &= MOXA_MUST_GDL_MASK;
- if (gdl >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
- }
- while (gdl--) {
- ch = inb(port->ioaddr + UART_RX);
- tty_insert_flip_char(&port->port, ch, 0);
- cnt++;
- }
- goto end_intr;
+ if (hwid == MOXA_OTHER_UART)
+ return false;
+ if (status & (UART_LSR_BRK_ERROR_BITS | MOXA_MUST_LSR_RERR))
+ return false;
+
+ gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
+ if (hwid == MOXA_MUST_MU150_HWID)
+ gdl &= MOXA_MUST_GDL_MASK;
+
+ while (gdl--) {
+ u8 ch = inb(port->ioaddr + UART_RX);
+ if (!tty_insert_flip_char(&port->port, ch, 0))
+ port->icount.buf_overrun++;
}
-intr_old:
+
+ return true;
+}
+
+static u8 mxser_receive_chars_old(struct tty_struct *tty,
+ struct mxser_port *port, u8 status)
+{
+ enum mxser_must_hwid hwid = port->board->must_hwid;
+ int ignored = 0;
+ int max = 256;
+ u8 ch;
do {
if (max-- < 0)
break;
ch = inb(port->ioaddr + UART_RX);
- if (port->board->chip_flag && (*status & UART_LSR_OE))
- outb(0x23, port->ioaddr + UART_FCR);
- *status &= port->read_status_mask;
- if (*status & port->ignore_status_mask) {
+ if (hwid && (status & UART_LSR_OE))
+ outb(port->FCR | UART_FCR_CLEAR_RCVR,
+ port->ioaddr + UART_FCR);
+ status &= port->read_status_mask;
+ if (status & port->ignore_status_mask) {
if (++ignored > 100)
break;
} else {
char flag = 0;
- if (*status & UART_LSR_SPECIAL) {
- if (*status & UART_LSR_BI) {
+ if (status & UART_LSR_BRK_ERROR_BITS) {
+ if (status & UART_LSR_BI) {
flag = TTY_BREAK;
port->icount.brk++;
if (port->port.flags & ASYNC_SAK)
do_SAK(tty);
- } else if (*status & UART_LSR_PE) {
+ } else if (status & UART_LSR_PE) {
flag = TTY_PARITY;
port->icount.parity++;
- } else if (*status & UART_LSR_FE) {
+ } else if (status & UART_LSR_FE) {
flag = TTY_FRAME;
port->icount.frame++;
- } else if (*status & UART_LSR_OE) {
+ } else if (status & UART_LSR_OE) {
flag = TTY_OVERRUN;
port->icount.overrun++;
- } else
- flag = TTY_BREAK;
+ }
}
- tty_insert_flip_char(&port->port, ch, flag);
- cnt++;
- if (cnt >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
+ if (!tty_insert_flip_char(&port->port, ch, flag)) {
+ port->icount.buf_overrun++;
break;
}
-
}
- if (port->board->chip_flag)
+ if (hwid)
break;
- *status = inb(port->ioaddr + UART_LSR);
- } while (*status & UART_LSR_DR);
+ status = inb(port->ioaddr + UART_LSR);
+ } while (status & UART_LSR_DR);
-end_intr:
- mxvar_log.rxcnt[tty->index] += cnt;
- port->mon_data.rxcnt += cnt;
- port->mon_data.up_rxcnt += cnt;
+ return status;
+}
+
+static u8 mxser_receive_chars(struct tty_struct *tty,
+ struct mxser_port *port, u8 status)
+{
+ if (!mxser_receive_chars_new(port, status))
+ status = mxser_receive_chars_old(tty, port, status);
- /*
- * We are called from an interrupt context with &port->slock
- * being held. Drop it temporarily in order to prevent
- * recursive locking.
- */
- spin_unlock(&port->slock);
tty_flip_buffer_push(&port->port);
- spin_lock(&port->slock);
+
+ return status;
}
static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
{
- int count, cnt;
+ int count;
if (port->x_char) {
outb(port->x_char, port->ioaddr + UART_TX);
port->x_char = 0;
- mxvar_log.txcnt[tty->index]++;
- port->mon_data.txcnt++;
- port->mon_data.up_txcnt++;
port->icount.tx++;
return;
}
- if (port->port.xmit_buf == NULL)
- return;
-
- if (port->xmit_cnt <= 0 || tty->stopped ||
- (tty->hw_stopped &&
- (port->type != PORT_16550A) &&
- (!port->board->chip_flag))) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
+ if (kfifo_is_empty(&port->port.xmit_fifo) || tty->flow.stopped ||
+ (tty->hw_stopped && !mxser_16550A_or_MUST(port))) {
+ __mxser_stop_tx(port);
return;
}
- cnt = port->xmit_cnt;
count = port->xmit_fifo_size;
do {
- outb(port->port.xmit_buf[port->xmit_tail++],
- port->ioaddr + UART_TX);
- port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
- if (--port->xmit_cnt <= 0)
+ unsigned char c;
+
+ if (!kfifo_get(&port->port.xmit_fifo, &c))
break;
- } while (--count > 0);
- mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
- port->mon_data.txcnt += (cnt - port->xmit_cnt);
- port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
- port->icount.tx += (cnt - port->xmit_cnt);
+ outb(c, port->ioaddr + UART_TX);
+ port->icount.tx++;
+ } while (--count > 0);
- if (port->xmit_cnt < WAKEUP_CHARS)
+ if (kfifo_len(&port->port.xmit_fifo) < WAKEUP_CHARS)
tty_wakeup(tty);
- if (port->xmit_cnt <= 0) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
+ if (kfifo_is_empty(&port->port.xmit_fifo))
+ __mxser_stop_tx(port);
+}
+
+static bool mxser_port_isr(struct mxser_port *port)
+{
+ struct tty_struct *tty;
+ u8 iir, status;
+ bool error = false;
+
+ iir = inb(port->ioaddr + UART_IIR);
+ if (iir & UART_IIR_NO_INT)
+ return true;
+
+ iir &= MOXA_MUST_IIR_MASK;
+ tty = tty_port_tty_get(&port->port);
+ if (!tty) {
+ status = inb(port->ioaddr + UART_LSR);
+ outb(port->FCR | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
+ port->ioaddr + UART_FCR);
+ inb(port->ioaddr + UART_MSR);
+
+ error = true;
+ goto put_tty;
+ }
+
+ status = inb(port->ioaddr + UART_LSR);
+
+ if (port->board->must_hwid) {
+ if (iir == MOXA_MUST_IIR_GDA ||
+ iir == MOXA_MUST_IIR_RDA ||
+ iir == MOXA_MUST_IIR_RTO ||
+ iir == MOXA_MUST_IIR_LSR)
+ status = mxser_receive_chars(tty, port, status);
+ } else {
+ status &= port->read_status_mask;
+ if (status & UART_LSR_DR)
+ status = mxser_receive_chars(tty, port, status);
}
+
+ mxser_check_modem_status(tty, port);
+
+ if (port->board->must_hwid) {
+ if (iir == 0x02 && (status & UART_LSR_THRE))
+ mxser_transmit_chars(tty, port);
+ } else {
+ if (status & UART_LSR_THRE)
+ mxser_transmit_chars(tty, port);
+ }
+
+put_tty:
+ tty_kref_put(tty);
+
+ return error;
}
/*
@@ -2211,33 +1657,21 @@ static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port
*/
static irqreturn_t mxser_interrupt(int irq, void *dev_id)
{
- int status, iir, i;
- struct mxser_board *brd = NULL;
+ struct mxser_board *brd = dev_id;
struct mxser_port *port;
- int max, irqbits, bits, msr;
unsigned int int_cnt, pass_counter = 0;
+ unsigned int i, max = brd->nports;
int handled = IRQ_NONE;
- struct tty_struct *tty;
+ u8 irqbits, bits, mask = BIT(max) - 1;
- for (i = 0; i < MXSER_BOARDS; i++)
- if (dev_id == &mxser_boards[i]) {
- brd = dev_id;
- break;
- }
-
- if (i == MXSER_BOARDS)
- goto irq_stop;
- if (brd == NULL)
- goto irq_stop;
- max = brd->info->nports;
while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
- irqbits = inb(brd->vector) & brd->vector_mask;
- if (irqbits == brd->vector_mask)
+ irqbits = inb(brd->vector) & mask;
+ if (irqbits == mask)
break;
handled = IRQ_HANDLED;
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
- if (irqbits == brd->vector_mask)
+ if (irqbits == mask)
break;
if (bits & irqbits)
continue;
@@ -2246,65 +1680,13 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
int_cnt = 0;
spin_lock(&port->slock);
do {
- iir = inb(port->ioaddr + UART_IIR);
- if (iir & UART_IIR_NO_INT)
- break;
- iir &= MOXA_MUST_IIR_MASK;
- tty = tty_port_tty_get(&port->port);
- if (!tty || port->closing ||
- !tty_port_initialized(&port->port)) {
- status = inb(port->ioaddr + UART_LSR);
- outb(0x27, port->ioaddr + UART_FCR);
- inb(port->ioaddr + UART_MSR);
- tty_kref_put(tty);
+ if (mxser_port_isr(port))
break;
- }
-
- status = inb(port->ioaddr + UART_LSR);
-
- if (status & UART_LSR_PE)
- port->err_shadow |= NPPI_NOTIFY_PARITY;
- if (status & UART_LSR_FE)
- port->err_shadow |= NPPI_NOTIFY_FRAMING;
- if (status & UART_LSR_OE)
- port->err_shadow |=
- NPPI_NOTIFY_HW_OVERRUN;
- if (status & UART_LSR_BI)
- port->err_shadow |= NPPI_NOTIFY_BREAK;
-
- if (port->board->chip_flag) {
- if (iir == MOXA_MUST_IIR_GDA ||
- iir == MOXA_MUST_IIR_RDA ||
- iir == MOXA_MUST_IIR_RTO ||
- iir == MOXA_MUST_IIR_LSR)
- mxser_receive_chars(tty, port,
- &status);
-
- } else {
- status &= port->read_status_mask;
- if (status & UART_LSR_DR)
- mxser_receive_chars(tty, port,
- &status);
- }
- msr = inb(port->ioaddr + UART_MSR);
- if (msr & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, port, msr);
-
- if (port->board->chip_flag) {
- if (iir == 0x02 && (status &
- UART_LSR_THRE))
- mxser_transmit_chars(tty, port);
- } else {
- if (status & UART_LSR_THRE)
- mxser_transmit_chars(tty, port);
- }
- tty_kref_put(tty);
} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
spin_unlock(&port->slock);
}
}
-irq_stop:
return handled;
}
@@ -2344,254 +1726,102 @@ static const struct tty_port_operations mxser_port_ops = {
* The MOXA Smartio/Industio serial driver boot-time initialization code!
*/
-static bool allow_overlapping_vector;
-module_param(allow_overlapping_vector, bool, S_IRUGO);
-MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
-
-static bool mxser_overlapping_vector(struct mxser_board *brd)
+static void mxser_initbrd(struct mxser_board *brd, bool high_baud)
{
- return allow_overlapping_vector &&
- brd->vector >= brd->ports[0].ioaddr &&
- brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
-}
-
-static int mxser_request_vector(struct mxser_board *brd)
-{
- if (mxser_overlapping_vector(brd))
- return 0;
- return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
-}
+ struct mxser_port *info;
+ unsigned int i;
+ bool is_mu860;
-static void mxser_release_vector(struct mxser_board *brd)
-{
- if (mxser_overlapping_vector(brd))
- return;
- release_region(brd->vector, 1);
-}
+ brd->must_hwid = mxser_must_get_hwid(brd->ports[0].ioaddr);
+ is_mu860 = brd->must_hwid == MOXA_MUST_MU860_HWID;
-static void mxser_release_ISA_res(struct mxser_board *brd)
-{
- release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
- mxser_release_vector(brd);
-}
+ for (i = 0; i < UART_INFO_NUM; i++) {
+ if (Gpci_uart_info[i].type == brd->must_hwid) {
+ brd->max_baud = Gpci_uart_info[i].max_baud;
-static int mxser_initbrd(struct mxser_board *brd)
-{
- struct mxser_port *info;
- unsigned int i;
- int retval;
+ /* exception....CP-102 */
+ if (high_baud)
+ brd->max_baud = 921600;
+ break;
+ }
+ }
- printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
- brd->ports[0].max_baud);
+ if (is_mu860) {
+ /* set to RS232 mode by default */
+ outb(0, brd->vector + 4);
+ outb(0, brd->vector + 0x0c);
+ }
- for (i = 0; i < brd->info->nports; i++) {
+ for (i = 0; i < brd->nports; i++) {
info = &brd->ports[i];
+ if (is_mu860) {
+ if (i < 4)
+ info->opmode_ioaddr = brd->vector + 4;
+ else
+ info->opmode_ioaddr = brd->vector + 0x0c;
+ }
tty_port_init(&info->port);
info->port.ops = &mxser_port_ops;
info->board = brd;
- info->stop_rx = 0;
- info->ldisc_stop_rx = 0;
/* Enhance mode enabled here */
- if (brd->chip_flag != MOXA_OTHER_UART)
- mxser_enable_must_enchance_mode(info->ioaddr);
+ if (brd->must_hwid != MOXA_OTHER_UART)
+ mxser_must_set_enhance_mode(info->ioaddr, true);
- info->type = brd->uart_type;
+ info->type = PORT_16550A;
- process_txrx_fifo(info);
+ mxser_process_txrx_fifo(info);
- info->custom_divisor = info->baud_base * 16;
info->port.close_delay = 5 * HZ / 10;
info->port.closing_wait = 30 * HZ;
- info->normal_termios = mxvar_sdriver->init_termios;
- memset(&info->mon_data, 0, sizeof(struct mxser_mon));
- info->err_shadow = 0;
spin_lock_init(&info->slock);
/* before set INT ISR, disable all int */
outb(inb(info->ioaddr + UART_IER) & 0xf0,
info->ioaddr + UART_IER);
}
-
- retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
- brd);
- if (retval) {
- for (i = 0; i < brd->info->nports; i++)
- tty_port_destroy(&brd->ports[i].port);
- printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
- "conflict with another device.\n",
- brd->info->name, brd->irq);
- }
-
- return retval;
-}
-
-static void mxser_board_remove(struct mxser_board *brd)
-{
- unsigned int i;
-
- for (i = 0; i < brd->info->nports; i++) {
- tty_unregister_device(mxvar_sdriver, brd->idx + i);
- tty_port_destroy(&brd->ports[i].port);
- }
- free_irq(brd->irq, brd);
-}
-
-static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
-{
- int id, i, bits, ret;
- unsigned short regs[16], irq;
- unsigned char scratch, scratch2;
-
- brd->chip_flag = MOXA_OTHER_UART;
-
- id = mxser_read_register(cap, regs);
- switch (id) {
- case C168_ASIC_ID:
- brd->info = &mxser_cards[0];
- break;
- case C104_ASIC_ID:
- brd->info = &mxser_cards[1];
- break;
- case CI104J_ASIC_ID:
- brd->info = &mxser_cards[2];
- break;
- case C102_ASIC_ID:
- brd->info = &mxser_cards[5];
- break;
- case CI132_ASIC_ID:
- brd->info = &mxser_cards[6];
- break;
- case CI134_ASIC_ID:
- brd->info = &mxser_cards[7];
- break;
- default:
- return 0;
- }
-
- irq = 0;
- /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
- Flag-hack checks if configuration should be read as 2-port here. */
- if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- if (irq != (regs[9] & 0xFF00))
- goto err_irqconflict;
- } else if (brd->info->nports == 4) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if (irq != regs[9])
- goto err_irqconflict;
- } else if (brd->info->nports == 8) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if ((irq != regs[9]) || (irq != regs[10]))
- goto err_irqconflict;
- }
-
- if (!irq) {
- printk(KERN_ERR "mxser: interrupt number unset\n");
- return -EIO;
- }
- brd->irq = ((int)(irq & 0xF000) >> 12);
- for (i = 0; i < 8; i++)
- brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
- if ((regs[12] & 0x80) == 0) {
- printk(KERN_ERR "mxser: invalid interrupt vector\n");
- return -EIO;
- }
- brd->vector = (int)regs[11]; /* interrupt vector */
- if (id == 1)
- brd->vector_mask = 0x00FF;
- else
- brd->vector_mask = 0x000F;
- for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
- if (regs[12] & bits) {
- brd->ports[i].baud_base = 921600;
- brd->ports[i].max_baud = 921600;
- } else {
- brd->ports[i].baud_base = 115200;
- brd->ports[i].max_baud = 115200;
- }
- }
- scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
- outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
- outb(0, cap + UART_EFR); /* EFR is the same as FCR */
- outb(scratch2, cap + UART_LCR);
- outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
- scratch = inb(cap + UART_IIR);
-
- if (scratch & 0xC0)
- brd->uart_type = PORT_16550A;
- else
- brd->uart_type = PORT_16450;
- if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
- "mxser(IO)")) {
- printk(KERN_ERR "mxser: can't request ports I/O region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return -EIO;
- }
-
- ret = mxser_request_vector(brd);
- if (ret) {
- release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
- printk(KERN_ERR "mxser: can't request interrupt vector region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return ret;
- }
- return brd->info->nports;
-
-err_irqconflict:
- printk(KERN_ERR "mxser: invalid interrupt number\n");
- return -EIO;
}
static int mxser_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
-#ifdef CONFIG_PCI
struct mxser_board *brd;
- unsigned int i, j;
+ unsigned int i, base;
unsigned long ioaddress;
+ unsigned short nports = MXSER_NPORTS(ent->driver_data);
struct device *tty_dev;
int retval = -EINVAL;
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info == NULL)
- break;
-
+ i = find_first_zero_bit(mxser_boards, MXSER_BOARDS);
if (i >= MXSER_BOARDS) {
dev_err(&pdev->dev, "too many boards found (maximum %d), board "
"not configured\n", MXSER_BOARDS);
goto err;
}
- brd = &mxser_boards[i];
- brd->idx = i * MXSER_PORTS_PER_BOARD;
- dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
- mxser_cards[ent->driver_data].name,
- pdev->bus->number, PCI_SLOT(pdev->devfn));
+ brd = devm_kzalloc(&pdev->dev, struct_size(brd, ports, nports),
+ GFP_KERNEL);
+ if (!brd)
+ goto err;
+
+ brd->idx = i;
+ __set_bit(brd->idx, mxser_boards);
+ base = i * MXSER_PORTS_PER_BOARD;
- retval = pci_enable_device(pdev);
+ retval = pcim_enable_device(pdev);
if (retval) {
dev_err(&pdev->dev, "PCI enable failed\n");
- goto err;
+ goto err_zero;
}
/* io address */
ioaddress = pci_resource_start(pdev, 2);
retval = pci_request_region(pdev, 2, "mxser(IO)");
if (retval)
- goto err_dis;
+ goto err_zero;
- brd->info = &mxser_cards[ent->driver_data];
- for (i = 0; i < brd->info->nports; i++)
+ brd->nports = nports;
+ for (i = 0; i < nports; i++)
brd->ports[i].ioaddr = ioaddress + 8 * i;
/* vector */
@@ -2604,53 +1834,23 @@ static int mxser_probe(struct pci_dev *pdev,
/* irq */
brd->irq = pdev->irq;
- brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
- brd->uart_type = PORT_16550A;
- brd->vector_mask = 0;
-
- for (i = 0; i < brd->info->nports; i++) {
- for (j = 0; j < UART_INFO_NUM; j++) {
- if (Gpci_uart_info[j].type == brd->chip_flag) {
- brd->ports[i].max_baud =
- Gpci_uart_info[j].max_baud;
-
- /* exception....CP-102 */
- if (brd->info->flags & MXSER_HIGHBAUD)
- brd->ports[i].max_baud = 921600;
- break;
- }
- }
- }
-
- if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
- for (i = 0; i < brd->info->nports; i++) {
- if (i < 4)
- brd->ports[i].opmode_ioaddr = ioaddress + 4;
- else
- brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
- }
- outb(0, ioaddress + 4); /* default set to RS232 mode */
- outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
- }
+ mxser_initbrd(brd, ent->driver_data & MXSER_HIGHBAUD);
- for (i = 0; i < brd->info->nports; i++) {
- brd->vector_mask |= (1 << i);
- brd->ports[i].baud_base = 921600;
+ retval = devm_request_irq(&pdev->dev, brd->irq, mxser_interrupt,
+ IRQF_SHARED, "mxser", brd);
+ if (retval) {
+ dev_err(&pdev->dev, "request irq failed");
+ goto err_relbrd;
}
- /* mxser_initbrd will hook ISR. */
- retval = mxser_initbrd(brd);
- if (retval)
- goto err_rel3;
-
- for (i = 0; i < brd->info->nports; i++) {
+ for (i = 0; i < nports; i++) {
tty_dev = tty_port_register_device(&brd->ports[i].port,
- mxvar_sdriver, brd->idx + i, &pdev->dev);
+ mxvar_sdriver, base + i, &pdev->dev);
if (IS_ERR(tty_dev)) {
retval = PTR_ERR(tty_dev);
for (; i > 0; i--)
tty_unregister_device(mxvar_sdriver,
- brd->idx + i - 1);
+ base + i - 1);
goto err_relbrd;
}
}
@@ -2659,35 +1859,25 @@ static int mxser_probe(struct pci_dev *pdev,
return 0;
err_relbrd:
- for (i = 0; i < brd->info->nports; i++)
+ for (i = 0; i < nports; i++)
tty_port_destroy(&brd->ports[i].port);
- free_irq(brd->irq, brd);
-err_rel3:
- pci_release_region(pdev, 3);
err_zero:
- brd->info = NULL;
- pci_release_region(pdev, 2);
-err_dis:
- pci_disable_device(pdev);
+ __clear_bit(brd->idx, mxser_boards);
err:
return retval;
-#else
- return -ENODEV;
-#endif
}
static void mxser_remove(struct pci_dev *pdev)
{
-#ifdef CONFIG_PCI
struct mxser_board *brd = pci_get_drvdata(pdev);
+ unsigned int i, base = brd->idx * MXSER_PORTS_PER_BOARD;
- mxser_board_remove(brd);
+ for (i = 0; i < brd->nports; i++) {
+ tty_unregister_device(mxvar_sdriver, base + i);
+ tty_port_destroy(&brd->ports[i].port);
+ }
- pci_release_region(pdev, 2);
- pci_release_region(pdev, 3);
- pci_disable_device(pdev);
- brd->info = NULL;
-#endif
+ __clear_bit(brd->idx, mxser_boards);
}
static struct pci_driver mxser_driver = {
@@ -2699,17 +1889,12 @@ static struct pci_driver mxser_driver = {
static int __init mxser_module_init(void)
{
- struct mxser_board *brd;
- struct device *tty_dev;
- unsigned int b, i, m;
int retval;
- mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
- if (!mxvar_sdriver)
- return -ENOMEM;
-
- printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
- MXSER_VERSION);
+ mxvar_sdriver = tty_alloc_driver(MXSER_PORTS, TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV);
+ if (IS_ERR(mxvar_sdriver))
+ return PTR_ERR(mxvar_sdriver);
/* Initialize the tty_driver structure */
mxvar_sdriver->name = "ttyMI";
@@ -2719,7 +1904,6 @@ static int __init mxser_module_init(void)
mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
mxvar_sdriver->init_termios = tty_std_termios;
mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
- mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
tty_set_operations(mxvar_sdriver, &mxser_ops);
retval = tty_register_driver(mxvar_sdriver);
@@ -2729,82 +1913,25 @@ static int __init mxser_module_init(void)
goto err_put;
}
- /* Start finding ISA boards here */
- for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
- if (!ioaddr[b])
- continue;
-
- brd = &mxser_boards[m];
- retval = mxser_get_ISA_conf(ioaddr[b], brd);
- if (retval <= 0) {
- brd->info = NULL;
- continue;
- }
-
- printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
- brd->info->name, ioaddr[b]);
-
- /* mxser_initbrd will hook ISR. */
- if (mxser_initbrd(brd) < 0) {
- mxser_release_ISA_res(brd);
- brd->info = NULL;
- continue;
- }
-
- brd->idx = m * MXSER_PORTS_PER_BOARD;
- for (i = 0; i < brd->info->nports; i++) {
- tty_dev = tty_port_register_device(&brd->ports[i].port,
- mxvar_sdriver, brd->idx + i, NULL);
- if (IS_ERR(tty_dev)) {
- for (; i > 0; i--)
- tty_unregister_device(mxvar_sdriver,
- brd->idx + i - 1);
- for (i = 0; i < brd->info->nports; i++)
- tty_port_destroy(&brd->ports[i].port);
- free_irq(brd->irq, brd);
- mxser_release_ISA_res(brd);
- brd->info = NULL;
- break;
- }
- }
- if (brd->info == NULL)
- continue;
-
- m++;
- }
-
retval = pci_register_driver(&mxser_driver);
if (retval) {
printk(KERN_ERR "mxser: can't register pci driver\n");
- if (!m) {
- retval = -ENODEV;
- goto err_unr;
- } /* else: we have some ISA cards under control */
+ goto err_unr;
}
return 0;
err_unr:
tty_unregister_driver(mxvar_sdriver);
err_put:
- put_tty_driver(mxvar_sdriver);
+ tty_driver_kref_put(mxvar_sdriver);
return retval;
}
static void __exit mxser_module_exit(void)
{
- unsigned int i;
-
pci_unregister_driver(&mxser_driver);
-
- for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
- if (mxser_boards[i].info != NULL)
- mxser_board_remove(&mxser_boards[i]);
tty_unregister_driver(mxvar_sdriver);
- put_tty_driver(mxvar_sdriver);
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info != NULL)
- mxser_release_ISA_res(&mxser_boards[i]);
+ tty_driver_kref_put(mxvar_sdriver);
}
module_init(mxser_module_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.