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mxser.c
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mxser.c
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/*
* mxser.c -- MOXA Smartio/Industio family multiport serial driver.
*
* Copyright (C) 1999-2006 Moxa Technologies ([email protected]).
* Copyright (C) 2006-2008 Jiri Slaby <[email protected]>
*
* This code is loosely based on the 1.8 moxa driver which is based on
* Linux serial driver, written by Linus Torvalds, Theodore T'so and
* others.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
* <[email protected]>. The original 1.8 code is available on
* www.moxa.com.
* - Fixed x86_64 cleanness
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/gfp.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "mxser.h"
#define MXSER_VERSION "2.0.5" /* 1.14 */
#define MXSERMAJOR 174
#define MXSER_BOARDS 4 /* Max. boards */
#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
#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
/* 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;
} 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}
};
#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 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 },
{ }
};
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_array(ioaddr, ulong, 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 {
struct tty_port port;
struct mxser_board *board;
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 */
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;
struct async_icount icount; /* kernel counters for 4 input interrupts */
int timeout;
int read_status_mask;
int ignore_status_mask;
int xmit_fifo_size;
int xmit_head;
int xmit_tail;
int xmit_cnt;
struct ktermios normal_termios;
struct mxser_mon mon_data;
spinlock_t slock;
};
struct mxser_board {
unsigned int idx;
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];
};
struct mxser_mstatus {
tcflag_t cflag;
int cts;
int dsr;
int ri;
int dcd;
};
static struct mxser_board 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)
{
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_EFRB_ENABLE;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_enchance_mode(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_EFRB_ENABLE;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
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);
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);
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);
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);
outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
{
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);
outb(oldlcr, baseio + UART_LCR);
}
static void SET_MOXA_MUST_NO_SOFTWARE_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_MASK;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_enable_must_tx_software_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;
efr |= MOXA_MUST_EFR_SF_TX1;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_tx_software_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);
}
static void mxser_enable_must_rx_software_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_RX_MASK;
efr |= MOXA_MUST_EFR_SF_RX1;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_rx_software_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_RX_MASK;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
#ifdef CONFIG_PCI
static int __devinit CheckIsMoxaMust(unsigned long io)
{
u8 oldmcr, hwid;
int i;
outb(0, io + UART_LCR);
mxser_disable_must_enchance_mode(io);
oldmcr = inb(io + UART_MCR);
outb(0, io + UART_MCR);
mxser_set_must_xon1_value(io, 0x11);
if ((hwid = 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 */
if (hwid == Gpci_uart_info[i].type)
return (int)hwid;
}
return MOXA_OTHER_UART;
}
#endif
static void process_txrx_fifo(struct mxser_port *info)
{
int i;
if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
info->rx_trigger = 1;
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;
}
}
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
{
static unsigned char mxser_msr[MXSER_PORTS + 1];
unsigned char status = 0;
status = inb(baseaddr + UART_MSR);
mxser_msr[port] &= 0x0F;
mxser_msr[port] |= status;
status = mxser_msr[port];
if (mode)
mxser_msr[port] = 0;
return status;
}
static int mxser_carrier_raised(struct tty_port *port)
{
struct mxser_port *mp = container_of(port, struct mxser_port, port);
return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
}
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;
spin_lock_irqsave(&mp->slock, flags);
if (on)
outb(inb(mp->ioaddr + UART_MCR) |
UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
else
outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
mp->ioaddr + UART_MCR);
spin_unlock_irqrestore(&mp->slock, flags);
}
static int mxser_set_baud(struct tty_struct *tty, long newspd)
{
struct mxser_port *info = tty->driver_data;
int quot = 0, baud;
unsigned char cval;
if (!info->ioaddr)
return -1;
if (newspd > info->max_baud)
return -1;
if (newspd == 134) {
quot = 2 * info->baud_base / 269;
tty_encode_baud_rate(tty, 134, 134);
} else if (newspd) {
quot = info->baud_base / newspd;
if (quot == 0)
quot = 1;
baud = info->baud_base/quot;
tty_encode_baud_rate(tty, baud, baud);
} else {
quot = 0;
}
info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
info->timeout += HZ / 50; /* Add .02 seconds of slop */
if (quot) {
info->MCR |= UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
} else {
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
return 0;
}
cval = inb(info->ioaddr + UART_LCR);
outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
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 *= 8;
if (quot % newspd > newspd / 2) {
quot /= newspd;
quot++;
} else
quot /= newspd;
mxser_set_must_enum_value(info->ioaddr, quot);
} else
#endif
mxser_set_must_enum_value(info->ioaddr, 0);
return 0;
}
/*
* 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,
struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
unsigned cflag, cval, fcr;
int ret = 0;
unsigned char status;
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));
/* 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... */
}
if (cflag & CSTOPB)
cval |= 0x04;
if (cflag & PARENB)
cval |= UART_LCR_PARITY;
if (!(cflag & PARODD))
cval |= UART_LCR_EPAR;
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;
}
}
}
/* CTS flow control flag and modem status interrupts */
info->IER &= ~UART_IER_MSI;
info->MCR &= ~UART_MCR_AFE;
if (cflag & CRTSCTS) {
info->port.flags |= ASYNC_CTS_FLOW;
info->IER |= UART_IER_MSI;
if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
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);
}
}
}
}
} else {
info->port.flags &= ~ASYNC_CTS_FLOW;
}
outb(info->MCR, info->ioaddr + UART_MCR);
if (cflag & CLOCAL) {
info->port.flags &= ~ASYNC_CHECK_CD;
} else {
info->port.flags |= ASYNC_CHECK_CD;
info->IER |= UART_IER_MSI;
}
outb(info->IER, info->ioaddr + UART_IER);
/*
* Set up parity check flag
*/
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
if (I_INPCK(tty))
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
if (I_BRKINT(tty) || I_PARMRK(tty))
info->read_status_mask |= UART_LSR_BI;
info->ignore_status_mask = 0;
if (I_IGNBRK(tty)) {
info->ignore_status_mask |= UART_LSR_BI;
info->read_status_mask |= UART_LSR_BI;
/*
* If we're ignore parity and break indicators, ignore
* overruns too. (For real raw support).
*/
if (I_IGNPAR(tty)) {
info->ignore_status_mask |=
UART_LSR_OE |
UART_LSR_PE |
UART_LSR_FE;
info->read_status_mask |=
UART_LSR_OE |
UART_LSR_PE |
UART_LSR_FE;
}
}
if (info->board->chip_flag) {
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);
}
}
outb(fcr, info->ioaddr + UART_FCR); /* set 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)
{
/* update input line counters */
if (status & UART_MSR_TERI)
port->icount.rng++;
if (status & UART_MSR_DDSR)
port->icount.dsr++;
if (status & UART_MSR_DDCD)
port->icount.dcd++;
if (status & UART_MSR_DCTS)
port->icount.cts++;
port->mon_data.modem_status = status;
wake_up_interruptible(&port->port.delta_msr_wait);
if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
if (status & UART_MSR_DCD)
wake_up_interruptible(&port->port.open_wait);
}
if (port->port.flags & ASYNC_CTS_FLOW) {
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);
}
}
}
}
}
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;
page = __get_free_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
spin_lock_irqsave(&info->slock, flags);
if (!info->ioaddr || !info->type) {
set_bit(TTY_IO_ERROR, &tty->flags);
free_page(page);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
}
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);
/*
* At this point there's no way the LSR could still be 0xFF;
* if it is, then bail out, because there's likely no UART
* here.
*/
if (inb(info->ioaddr + UART_LSR) == 0xff) {
spin_unlock_irqrestore(&info->slock, flags);
if (capable(CAP_SYS_ADMIN)) {
if (tty)
set_bit(TTY_IO_ERROR, &tty->flags);
return 0;
} else
return -ENODEV;
}
/*
* Clear the interrupt registers.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
/*
* Now, initialize the UART
*/
outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
/*
* Finally, enable interrupts
*/
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
if (info->board->chip_flag)
info->IER |= MOXA_MUST_IER_EGDAI;
outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
/*
* And clear the interrupt registers again for luck.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
clear_bit(TTY_IO_ERROR, &tty->flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/*
* and set the speed of the serial port
*/
mxser_change_speed(tty, NULL);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
}
/*
* This routine will shutdown a serial port
*/
static void mxser_shutdown_port(struct tty_port *port)
{
struct mxser_port *info = container_of(port, struct mxser_port, port);
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
/*
* 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);
/* 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);
spin_unlock_irqrestore(&info->slock, flags);
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/