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linux/drivers/char/mxser.c
Kirill Smelkov 6f08b72cdd [PATCH] serial moxa: fix wrong BUG 
There is a wrong BUG in mxser_close.

The BUG is triggered when tty->driver_data == NULL, But in fact this is not
a bug, because tty->driver->close is called even when tty->driver->open
fails.

LDD3 tells us to do nothing in such cases.

Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:53:36 -08:00

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/*
* mxser.c -- MOXA Smartio/Industio family multiport serial driver.
*
* Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw).
*
* This code is loosely based on the 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Original release 10/26/00
*
* 02/06/01 Support MOXA Industio family boards.
* 02/06/01 Support TIOCGICOUNT.
* 02/06/01 Fix the problem for connecting to serial mouse.
* 02/06/01 Fix the problem for H/W flow control.
* 02/06/01 Fix the compling warning when CONFIG_PCI
* don't be defined.
*
* Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
* <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
* - Fixed x86_64 cleanness
* - Fixed sleep with spinlock held in mxser_send_break
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/autoconf.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/smp_lock.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bitops.h>
#include <asm/uaccess.h>
#include "mxser.h"
#define MXSER_VERSION "1.8"
#define MXSERMAJOR 174
#define MXSERCUMAJOR 175
#define MXSER_EVENT_TXLOW 1
#define MXSER_EVENT_HANGUP 2
#define MXSER_BOARDS 4 /* Max. boards */
#define MXSER_PORTS 32 /* Max. ports */
#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
#define MXSER_ISR_PASS_LIMIT 256
#define MXSER_ERR_IOADDR -1
#define MXSER_ERR_IRQ -2
#define MXSER_ERR_IRQ_CONFLIT -3
#define MXSER_ERR_VECTOR -4
#define SERIAL_TYPE_NORMAL 1
#define SERIAL_TYPE_CALLOUT 2
#define WAKEUP_CHARS 256
#define UART_MCR_AFE 0x20
#define UART_LSR_SPECIAL 0x1E
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
#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
enum {
MXSER_BOARD_C168_ISA = 1,
MXSER_BOARD_C104_ISA,
MXSER_BOARD_CI104J,
MXSER_BOARD_C168_PCI,
MXSER_BOARD_C104_PCI,
MXSER_BOARD_C102_ISA,
MXSER_BOARD_CI132,
MXSER_BOARD_CI134,
MXSER_BOARD_CP132,
MXSER_BOARD_CP114,
MXSER_BOARD_CT114,
MXSER_BOARD_CP102,
MXSER_BOARD_CP104U,
MXSER_BOARD_CP168U,
MXSER_BOARD_CP132U,
MXSER_BOARD_CP134U,
MXSER_BOARD_CP104JU,
MXSER_BOARD_RC7000,
MXSER_BOARD_CP118U,
MXSER_BOARD_CP102UL,
MXSER_BOARD_CP102U,
};
static char *mxser_brdname[] = {
"C168 series",
"C104 series",
"CI-104J series",
"C168H/PCI series",
"C104H/PCI series",
"C102 series",
"CI-132 series",
"CI-134 series",
"CP-132 series",
"CP-114 series",
"CT-114 series",
"CP-102 series",
"CP-104U series",
"CP-168U series",
"CP-132U series",
"CP-134U series",
"CP-104JU series",
"Moxa UC7000 Serial",
"CP-118U series",
"CP-102UL series",
"CP-102U series",
};
static int mxser_numports[] = {
8, // C168-ISA
4, // C104-ISA
4, // CI104J
8, // C168-PCI
4, // C104-PCI
2, // C102-ISA
2, // CI132
4, // CI134
2, // CP132
4, // CP114
4, // CT114
2, // CP102
4, // CP104U
8, // CP168U
2, // CP132U
4, // CP134U
4, // CP104JU
8, // RC7000
8, // CP118U
2, // CP102UL
2, // CP102U
};
#define UART_TYPE_NUM 2
static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
MOXA_MUST_MU150_HWID,
MOXA_MUST_MU860_HWID
};
// This is only for PCI
#define UART_INFO_NUM 3
struct mxpciuart_info {
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;
};
static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
{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}
};
#ifdef CONFIG_PCI
static struct pci_device_id mxser_pcibrds[] = {
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
{0}
};
MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
#endif
typedef struct _moxa_pci_info {
unsigned short busNum;
unsigned short devNum;
struct pci_dev *pdev; // add by Victor Yu. 06-23-2003
} moxa_pci_info;
static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
static int ttymajor = MXSERMAJOR;
static int calloutmajor = MXSERCUMAJOR;
static int verbose = 0;
/* Variables for insmod */
MODULE_AUTHOR("Casper Yang");
MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
MODULE_PARM(ioaddr, "1-4i");
MODULE_PARM(ttymajor, "i");
MODULE_PARM(calloutmajor, "i");
MODULE_PARM(verbose, "i");
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_hwconf {
int board_type;
int ports;
int irq;
int vector;
int vector_mask;
int uart_type;
int ioaddr[MXSER_PORTS_PER_BOARD];
int baud_base[MXSER_PORTS_PER_BOARD];
moxa_pci_info pciInfo;
int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 09-04-2002
int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 01-05-2004
};
struct mxser_struct {
int port;
int base; /* port base address */
int irq; /* port using irq no. */
int vector; /* port irq vector */
int vectormask; /* port vector mask */
int rx_high_water;
int rx_trigger; /* Rx fifo trigger level */
int rx_low_water;
int baud_base; /* max. speed */
int flags; /* defined in tty.h */
int type; /* UART type */
struct tty_struct *tty;
int read_status_mask;
int ignore_status_mask;
int xmit_fifo_size;
int custom_divisor;
int x_char; /* xon/xoff character */
int close_delay;
unsigned short closing_wait;
int IER; /* Interrupt Enable Register */
int MCR; /* Modem control register */
unsigned long event;
int count; /* # of fd on device */
int blocked_open; /* # of blocked opens */
long session; /* Session of opening process */
long pgrp; /* pgrp of opening process */
unsigned char *xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
struct work_struct tqueue;
struct termios normal_termios;
struct termios callout_termios;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
wait_queue_head_t delta_msr_wait;
struct async_icount icount; /* kernel counters for the 4 input interrupts */
int timeout;
int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
int MaxCanSetBaudRate; // add by Victor Yu. 09-04-2002
int opmode_ioaddr; // add by Victor Yu. 01-05-2004
unsigned char stop_rx;
unsigned char ldisc_stop_rx;
long realbaud;
struct mxser_mon mon_data;
unsigned char err_shadow;
spinlock_t slock;
};
struct mxser_mstatus {
tcflag_t cflag;
int cts;
int dsr;
int ri;
int dcd;
};
static struct mxser_mstatus GMStatus[MXSER_PORTS];
static int mxserBoardCAP[MXSER_BOARDS] = {
0, 0, 0, 0
/* 0x180, 0x280, 0x200, 0x320 */
};
static struct tty_driver *mxvar_sdriver;
static struct mxser_struct mxvar_table[MXSER_PORTS];
static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
static struct termios *mxvar_termios[MXSER_PORTS + 1];
static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
static struct mxser_log mxvar_log;
static int mxvar_diagflag;
static unsigned char mxser_msr[MXSER_PORTS + 1];
static struct mxser_mon_ext mon_data_ext;
static int mxser_set_baud_method[MXSER_PORTS + 1];
static spinlock_t gm_lock;
/*
* This is used to figure out the divisor speeds and the timeouts
*/
static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
/*
* static functions:
*/
static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
static int mxser_init(void);
//static void mxser_poll(unsigned long);
static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
static void mxser_do_softint(void *);
static int mxser_open(struct tty_struct *, struct file *);
static void mxser_close(struct tty_struct *, struct file *);
static int mxser_write(struct tty_struct *, const unsigned char *, int);
static int mxser_write_room(struct tty_struct *);
static void mxser_flush_buffer(struct tty_struct *);
static int mxser_chars_in_buffer(struct tty_struct *);
static void mxser_flush_chars(struct tty_struct *);
static void mxser_put_char(struct tty_struct *, unsigned char);
static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
static int mxser_ioctl_special(unsigned int, void __user *);
static void mxser_throttle(struct tty_struct *);
static void mxser_unthrottle(struct tty_struct *);
static void mxser_set_termios(struct tty_struct *, struct termios *);
static void mxser_stop(struct tty_struct *);
static void mxser_start(struct tty_struct *);
static void mxser_hangup(struct tty_struct *);
static void mxser_rs_break(struct tty_struct *, int);
static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
static void mxser_receive_chars(struct mxser_struct *, int *);
static void mxser_transmit_chars(struct mxser_struct *);
static void mxser_check_modem_status(struct mxser_struct *, int);
static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
static int mxser_startup(struct mxser_struct *);
static void mxser_shutdown(struct mxser_struct *);
static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
static void mxser_send_break(struct mxser_struct *, int);
static int mxser_tiocmget(struct tty_struct *, struct file *);
static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
static int mxser_set_baud(struct mxser_struct *info, long newspd);
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
static void mxser_startrx(struct tty_struct *tty);
static void mxser_stoprx(struct tty_struct *tty);
static int CheckIsMoxaMust(int io)
{
u8 oldmcr, hwid;
int i;
outb(0, io + UART_LCR);
DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
oldmcr = inb(io + UART_MCR);
outb(0, io + UART_MCR);
SET_MOXA_MUST_XON1_VALUE(io, 0x11);
if ((hwid = inb(io + UART_MCR)) != 0) {
outb(oldmcr, io + UART_MCR);
return (MOXA_OTHER_UART);
}
GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
for (i = 0; i < UART_TYPE_NUM; i++) {
if (hwid == Gmoxa_uart_id[i])
return (int) hwid;
}
return MOXA_OTHER_UART;
}
// above is modified by Victor Yu. 08-15-2002
static struct tty_operations mxser_ops = {
.open = mxser_open,
.close = mxser_close,
.write = mxser_write,
.put_char = mxser_put_char,
.flush_chars = mxser_flush_chars,
.write_room = mxser_write_room,
.chars_in_buffer = mxser_chars_in_buffer,
.flush_buffer = mxser_flush_buffer,
.ioctl = mxser_ioctl,
.throttle = mxser_throttle,
.unthrottle = mxser_unthrottle,
.set_termios = mxser_set_termios,
.stop = mxser_stop,
.start = mxser_start,
.hangup = mxser_hangup,
.break_ctl = mxser_rs_break,
.wait_until_sent = mxser_wait_until_sent,
.tiocmget = mxser_tiocmget,
.tiocmset = mxser_tiocmset,
};
/*
* The MOXA Smartio/Industio serial driver boot-time initialization code!
*/
static int __init mxser_module_init(void)
{
int ret;
if (verbose)
printk(KERN_DEBUG "Loading module mxser ...\n");
ret = mxser_init();
if (verbose)
printk(KERN_DEBUG "Done.\n");
return ret;
}
static void __exit mxser_module_exit(void)
{
int i, err;
if (verbose)
printk(KERN_DEBUG "Unloading module mxser ...\n");
err = tty_unregister_driver(mxvar_sdriver);
if (!err)
put_tty_driver(mxvar_sdriver);
else
printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
for (i = 0; i < MXSER_BOARDS; i++) {
struct pci_dev *pdev;
if (mxsercfg[i].board_type == -1)
continue;
else {
pdev = mxsercfg[i].pciInfo.pdev;
free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
if (pdev != NULL) { //PCI
release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
} else {
release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
release_region(mxsercfg[i].vector, 1);
}
}
}
if (verbose)
printk(KERN_DEBUG "Done.\n");
}
static void process_txrx_fifo(struct mxser_struct *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->IsMoxaMustChipFlag == 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 int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
{
struct mxser_struct *info;
int retval;
int i, n;
n = board * MXSER_PORTS_PER_BOARD;
info = &mxvar_table[n];
/*if (verbose) */ {
printk(KERN_DEBUG " ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
}
for (i = 0; i < hwconf->ports; i++, n++, info++) {
info->port = n;
info->base = hwconf->ioaddr[i];
info->irq = hwconf->irq;
info->vector = hwconf->vector;
info->vectormask = hwconf->vector_mask;
info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
info->stop_rx = 0;
info->ldisc_stop_rx = 0;
info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
//Enhance mode enabled here
if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
}
info->flags = ASYNC_SHARE_IRQ;
info->type = hwconf->uart_type;
info->baud_base = hwconf->baud_base[i];
info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
process_txrx_fifo(info);
info->custom_divisor = hwconf->baud_base[i] * 16;
info->close_delay = 5 * HZ / 10;
info->closing_wait = 30 * HZ;
INIT_WORK(&info->tqueue, mxser_do_softint, info);
info->normal_termios = mxvar_sdriver->init_termios;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
init_waitqueue_head(&info->delta_msr_wait);
memset(&info->mon_data, 0, sizeof(struct mxser_mon));
info->err_shadow = 0;
spin_lock_init(&info->slock);
}
/*
* Allocate the IRQ if necessary
*/
/* before set INT ISR, disable all int */
for (i = 0; i < hwconf->ports; i++) {
outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
}
n = board * MXSER_PORTS_PER_BOARD;
info = &mxvar_table[n];
retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
if (retval) {
printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
printk(" Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
return retval;
}
return 0;
}
static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
{
mxsercfg[board] = *hwconf;
}
#ifdef CONFIG_PCI
static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
{
int i, j;
// unsigned int val;
unsigned int ioaddress;
struct pci_dev *pdev = hwconf->pciInfo.pdev;
//io address
hwconf->board_type = board_type;
hwconf->ports = mxser_numports[board_type - 1];
ioaddress = pci_resource_start(pdev, 2);
request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
for (i = 0; i < hwconf->ports; i++) {
hwconf->ioaddr[i] = ioaddress + 8 * i;
}
//vector
ioaddress = pci_resource_start(pdev, 3);
request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
hwconf->vector = ioaddress;
//irq
hwconf->irq = hwconf->pciInfo.pdev->irq;
hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
hwconf->uart_type = PORT_16550A;
hwconf->vector_mask = 0;
for (i = 0; i < hwconf->ports; i++) {
for (j = 0; j < UART_INFO_NUM; j++) {
if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
//exception....CP-102
if (board_type == MXSER_BOARD_CP102)
hwconf->MaxCanSetBaudRate[i] = 921600;
break;
}
}
}
if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
for (i = 0; i < hwconf->ports; i++) {
if (i < 4)
hwconf->opmode_ioaddr[i] = ioaddress + 4;
else
hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
}
outb(0, ioaddress + 4); // default set to RS232 mode
outb(0, ioaddress + 0x0c); //default set to RS232 mode
}
for (i = 0; i < hwconf->ports; i++) {
hwconf->vector_mask |= (1 << i);
hwconf->baud_base[i] = 921600;
}
return (0);
}
#endif
static int mxser_init(void)
{
int i, m, retval, b, n;
struct pci_dev *pdev = NULL;
int index;
unsigned char busnum, devnum;
struct mxser_hwconf hwconf;
mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
if (!mxvar_sdriver)
return -ENOMEM;
spin_lock_init(&gm_lock);
for (i = 0; i < MXSER_BOARDS; i++) {
mxsercfg[i].board_type = -1;
}
printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
/* Initialize the tty_driver structure */
memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
mxvar_sdriver->name = "ttyM";
mxvar_sdriver->major = ttymajor;
mxvar_sdriver->minor_start = 0;
mxvar_sdriver->num = MXSER_PORTS + 1;
mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
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_set_operations(mxvar_sdriver, &mxser_ops);
mxvar_sdriver->ttys = mxvar_tty;
mxvar_sdriver->termios = mxvar_termios;
mxvar_sdriver->termios_locked = mxvar_termios_locked;
mxvar_diagflag = 0;
memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
memset(&mxvar_log, 0, sizeof(struct mxser_log));
memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
memset(&hwconf, 0, sizeof(struct mxser_hwconf));
m = 0;
/* Start finding ISA boards here */
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
int cap;
if (!(cap = mxserBoardCAP[b]))
continue;
retval = mxser_get_ISA_conf(cap, &hwconf);
if (retval != 0)
printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
if (retval <= 0) {
if (retval == MXSER_ERR_IRQ)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk(KERN_ERR "Invalid I/O address,board not configured\n");
continue;
}
hwconf.pciInfo.busNum = 0;
hwconf.pciInfo.devNum = 0;
hwconf.pciInfo.pdev = NULL;
mxser_getcfg(m, &hwconf);
//init mxsercfg first, or mxsercfg data is not correct on ISR.
//mxser_initbrd will hook ISR.
if (mxser_initbrd(m, &hwconf) < 0)
continue;
m++;
}
/* Start finding ISA boards from module arg */
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
int cap;
if (!(cap = ioaddr[b]))
continue;
retval = mxser_get_ISA_conf(cap, &hwconf);
if (retval != 0)
printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
if (retval <= 0) {
if (retval == MXSER_ERR_IRQ)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk(KERN_ERR "Invalid I/O address,board not configured\n");
continue;
}
hwconf.pciInfo.busNum = 0;
hwconf.pciInfo.devNum = 0;
hwconf.pciInfo.pdev = NULL;
mxser_getcfg(m, &hwconf);
//init mxsercfg first, or mxsercfg data is not correct on ISR.
//mxser_initbrd will hook ISR.
if (mxser_initbrd(m, &hwconf) < 0)
continue;
m++;
}
/* start finding PCI board here */
#ifdef CONFIG_PCI
n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
index = 0;
b = 0;
while (b < n) {
pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
if (pdev == NULL) {
b++;
continue;
}
hwconf.pciInfo.busNum = busnum = pdev->bus->number;
hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
hwconf.pciInfo.pdev = pdev;
printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
index++;
if (m >= MXSER_BOARDS) {
printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
} else {
if (pci_enable_device(pdev)) {
printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
continue;
}
retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
if (retval < 0) {
if (retval == MXSER_ERR_IRQ)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_IRQ_CONFLIT)
printk(KERN_ERR "Invalid interrupt number,board not configured\n");
else if (retval == MXSER_ERR_VECTOR)
printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
else if (retval == MXSER_ERR_IOADDR)
printk(KERN_ERR "Invalid I/O address,board not configured\n");
continue;
}
mxser_getcfg(m, &hwconf);
//init mxsercfg first, or mxsercfg data is not correct on ISR.
//mxser_initbrd will hook ISR.
if (mxser_initbrd(m, &hwconf) < 0)
continue;
m++;
}
}
#endif
retval = tty_register_driver(mxvar_sdriver);
if (retval) {
printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
put_tty_driver(mxvar_sdriver);
for (i = 0; i < MXSER_BOARDS; i++) {
if (mxsercfg[i].board_type == -1)
continue;
else {
free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
//todo: release io, vector
}
}
return retval;
}
return 0;
}
static void mxser_do_softint(void *private_)
{
struct mxser_struct *info = (struct mxser_struct *) private_;
struct tty_struct *tty;
tty = info->tty;
if (tty) {
if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
tty_wakeup(tty);
if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
tty_hangup(tty);
}
}
static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
{
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;
}
/*
* 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.
*/
static int mxser_open(struct tty_struct *tty, struct file *filp)
{
struct mxser_struct *info;
int retval, line;
/* initialize driver_data in case something fails */
tty->driver_data = NULL;
line = tty->index;
if (line == MXSER_PORTS)
return 0;
if (line < 0 || line > MXSER_PORTS)
return -ENODEV;
info = mxvar_table + line;
if (!info->base)
return (-ENODEV);
tty->driver_data = info;
info->tty = tty;
/*
* Start up serial port
*/
retval = mxser_startup(info);
if (retval)
return (retval);
retval = mxser_block_til_ready(tty, filp, info);
if (retval)
return (retval);
info->count++;
if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
*tty->termios = info->normal_termios;
else
*tty->termios = info->callout_termios;
mxser_change_speed(info, NULL);
}
info->session = current->signal->session;
info->pgrp = process_group(current);
clear_bit(TTY_DONT_FLIP, &tty->flags);
//status = mxser_get_msr(info->base, 0, info->port);
//mxser_check_modem_status(info, status);
/* unmark here for very high baud rate (ex. 921600 bps) used
*/
tty->low_latency = 1;
return 0;
}
/*
* 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_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long timeout;
unsigned long flags;
struct tty_ldisc *ld;
if (tty->index == MXSER_PORTS)
return;
if (!info)
return;
spin_lock_irqsave(&info->slock, flags);
if (tty_hung_up_p(filp)) {
spin_unlock_irqrestore(&info->slock, flags);
return;
}
if ((tty->count == 1) && (info->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
info->count = 0;
}
if (info->count) {
spin_unlock_irqrestore(&info->slock, flags);
return;
}
info->flags |= ASYNC_CLOSING;
spin_unlock_irqrestore(&info->slock, flags);
/*
* Save the termios structure, since this port may have
* separate termios for callout and dialin.
*/
if (info->flags & ASYNC_NORMAL_ACTIVE)
info->normal_termios = *tty->termios;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, info->closing_wait);
/*
* 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->IsMoxaMustChipFlag)
info->IER &= ~MOXA_MUST_RECV_ISR;
/* by William
info->read_status_mask &= ~UART_LSR_DR;
*/
if (info->flags & ASYNC_INITIALIZED) {
outb(info->IER, info->base + 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->base + UART_LSR) & UART_LSR_TEMT)) {
schedule_timeout_interruptible(5);
if (time_after(jiffies, timeout))
break;
}
}
mxser_shutdown(info);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
ld = tty_ldisc_ref(tty);
if (ld) {
if(ld->flush_buffer)
ld->flush_buffer(tty);
tty_ldisc_deref(ld);
}
tty->closing = 0;
info->event = 0;
info->tty = NULL;
if (info->blocked_open) {
if (info->close_delay)
schedule_timeout_interruptible(info->close_delay);
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
}
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
int c, total = 0;
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
if (!tty || !info->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->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);
buf += c;
count -= c;
total += c;
}
if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
spin_lock_irqsave(&info->slock, flags);
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
return total;
}
static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
if (!tty || !info->xmit_buf)
return;
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
return;
spin_lock_irqsave(&info->slock, flags);
info->xmit_buf[info->xmit_head++] = ch;
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
info->xmit_cnt++;
spin_unlock_irqrestore(&info->slock, flags);
if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
spin_lock_irqsave(&info->slock, flags);
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
}
static void mxser_flush_chars(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
return;
spin_lock_irqsave(&info->slock, flags);
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_write_room(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
int ret;
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
if (ret < 0)
ret = 0;
return (ret);
}
static int mxser_chars_in_buffer(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
return info->xmit_cnt;
}
static void mxser_flush_buffer(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
char fcr;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/* below added by shinhay */
fcr = inb(info->base + UART_FCR);
outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
outb(fcr, info->base + UART_FCR);
spin_unlock_irqrestore(&info->slock, flags);
/* above added by shinhay */
wake_up_interruptible(&tty->write_wait);
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
(tty->ldisc.write_wakeup) (tty);
}
static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
int retval;
struct async_icount cprev, cnow; /* kernel counter temps */
struct serial_icounter_struct __user *p_cuser;
unsigned long templ;
unsigned long flags;
void __user *argp = (void __user *)arg;
if (tty->index == MXSER_PORTS)
return (mxser_ioctl_special(cmd, argp));
// following add by Victor Yu. 01-05-2004
if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
int opmode, p;
static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
int shiftbit;
unsigned char val, mask;
p = info->port % 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;
val = inb(info->opmode_ioaddr);
val &= mask;
val |= (opmode << shiftbit);
outb(val, info->opmode_ioaddr);
} else {
shiftbit = p * 2;
opmode = inb(info->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
if (copy_to_user(argp, &opmode, sizeof(int)))
return -EFAULT;
}
return 0;
}
// above add by Victor Yu. 01-05-2004
if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return (-EIO);
}
switch (cmd) {
case TCSBRK: /* SVID version: non-zero arg --> no break */
retval = tty_check_change(tty);
if (retval)
return (retval);
tty_wait_until_sent(tty, 0);
if (!arg)
mxser_send_break(info, HZ / 4); /* 1/4 second */
return (0);
case TCSBRKP: /* support for POSIX tcsendbreak() */
retval = tty_check_change(tty);
if (retval)
return (retval);
tty_wait_until_sent(tty, 0);
mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
return (0);
case TIOCGSOFTCAR:
return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
case TIOCSSOFTCAR:
if (get_user(templ, (unsigned long __user *) argp))
return -EFAULT;
arg = templ;
tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
return (0);
case TIOCGSERIAL:
return mxser_get_serial_info(info, argp);
case TIOCSSERIAL:
return mxser_set_serial_info(info, argp);
case TIOCSERGETLSR: /* Get line status register */
return mxser_get_lsr_info(info, argp);
/*
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
* - mask passed in arg for lines of interest
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
* Caller should use TIOCGICOUNT to see which one it was
*/
case TIOCMIWAIT:{
DECLARE_WAITQUEUE(wait, current);
int ret;
spin_lock_irqsave(&info->slock, flags);
cprev = info->icount; /* note the counters on entry */
spin_unlock_irqrestore(&info->slock, flags);
add_wait_queue(&info->delta_msr_wait, &wait);
while (1) {
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount; /* atomic copy */
spin_unlock_irqrestore(&info->slock, flags);
set_current_state(TASK_INTERRUPTIBLE);
if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
ret = 0;
break;
}
/* see if a signal did it */
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
cprev = cnow;
}
current->state = TASK_RUNNING;
remove_wait_queue(&info->delta_msr_wait, &wait);
break;
}
/* NOTREACHED */
/*
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
* Return: write counters to the user passed counter struct
* NB: both 1->0 and 0->1 transitions are counted except for
* RI where only 0->1 is counted.
*/
case TIOCGICOUNT:
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount;
spin_unlock_irqrestore(&info->slock, flags);
p_cuser = argp;
/* modified by casper 1/11/2000 */
if (put_user(cnow.frame, &p_cuser->frame))
return -EFAULT;
if (put_user(cnow.brk, &p_cuser->brk))
return -EFAULT;
if (put_user(cnow.overrun, &p_cuser->overrun))
return -EFAULT;
if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
return -EFAULT;
if (put_user(cnow.parity, &p_cuser->parity))
return -EFAULT;
if (put_user(cnow.rx, &p_cuser->rx))
return -EFAULT;
if (put_user(cnow.tx, &p_cuser->tx))
return -EFAULT;
put_user(cnow.cts, &p_cuser->cts);
put_user(cnow.dsr, &p_cuser->dsr);
put_user(cnow.rng, &p_cuser->rng);
put_user(cnow.dcd, &p_cuser->dcd);
/* */
return 0;
case MOXA_HighSpeedOn:
return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
case MOXA_SDS_RSTICOUNTER:{
info->mon_data.rxcnt = 0;
info->mon_data.txcnt = 0;
return 0;
}
// (above) added by James.
case MOXA_ASPP_SETBAUD:{
long baud;
if (get_user(baud, (long __user *) argp))
return -EFAULT;
mxser_set_baud(info, baud);
return 0;
}
case MOXA_ASPP_GETBAUD:
if (copy_to_user(argp, &info->realbaud, sizeof(long)))
return -EFAULT;
return 0;
case MOXA_ASPP_OQUEUE:{
int len, lsr;
len = mxser_chars_in_buffer(tty);
lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
len += (lsr ? 0 : 1);
if (copy_to_user(argp, &len, sizeof(int)))
return -EFAULT;
return 0;
}
case MOXA_ASPP_MON:{
int mcr, status;
// info->mon_data.ser_param = tty->termios->c_cflag;
status = mxser_get_msr(info->base, 1, info->port, info);
mxser_check_modem_status(info, status);
mcr = inb(info->base + UART_MCR);
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 (info->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 (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
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[info->port] = method;
if (copy_to_user(argp, &method, sizeof(int)))
return -EFAULT;
return 0;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
#ifndef CMSPAR
#define CMSPAR 010000000000
#endif
static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
{
int i, result, status;
switch (cmd) {
case MOXA_GET_CONF:
if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
return -EFAULT;
return 0;
case MOXA_GET_MAJOR:
if (copy_to_user(argp, &ttymajor, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GET_CUMAJOR:
if (copy_to_user(argp, &calloutmajor, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_CHKPORTENABLE:
result = 0;
for (i = 0; i < MXSER_PORTS; i++) {
if (mxvar_table[i].base)
result |= (1 << i);
}
return put_user(result, (unsigned long __user *) argp);
case MOXA_GETDATACOUNT:
if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
return -EFAULT;
return (0);
case MOXA_GETMSTATUS:
for (i = 0; i < MXSER_PORTS; i++) {
GMStatus[i].ri = 0;
if (!mxvar_table[i].base) {
GMStatus[i].dcd = 0;
GMStatus[i].dsr = 0;
GMStatus[i].cts = 0;
continue;
}
if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
else
GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
status = inb(mxvar_table[i].base + UART_MSR);
if (status & 0x80 /*UART_MSR_DCD */ )
GMStatus[i].dcd = 1;
else
GMStatus[i].dcd = 0;
if (status & 0x20 /*UART_MSR_DSR */ )
GMStatus[i].dsr = 1;
else
GMStatus[i].dsr = 0;
if (status & 0x10 /*UART_MSR_CTS */ )
GMStatus[i].cts = 1;
else
GMStatus[i].cts = 0;
}
if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
return -EFAULT;
return 0;
case MOXA_ASPP_MON_EXT:{
int status;
int opmode, p;
int shiftbit;
unsigned cflag, iflag;
for (i = 0; i < MXSER_PORTS; i++) {
if (!mxvar_table[i].base)
continue;
status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
// mxser_check_modem_status(&mxvar_table[i], status);
if (status & UART_MSR_TERI)
mxvar_table[i].icount.rng++;
if (status & UART_MSR_DDSR)
mxvar_table[i].icount.dsr++;
if (status & UART_MSR_DDCD)
mxvar_table[i].icount.dcd++;
if (status & UART_MSR_DCTS)
mxvar_table[i].icount.cts++;
mxvar_table[i].mon_data.modem_status = status;
mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
cflag = mxvar_table[i].normal_termios.c_cflag;
iflag = mxvar_table[i].normal_termios.c_iflag;
} else {
cflag = mxvar_table[i].tty->termios->c_cflag;
iflag = mxvar_table[i].tty->termios->c_iflag;
}
mon_data_ext.databits[i] = cflag & CSIZE;
mon_data_ext.stopbits[i] = cflag & CSTOPB;
mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
mon_data_ext.flowctrl[i] = 0x00;
if (cflag & CRTSCTS)
mon_data_ext.flowctrl[i] |= 0x03;
if (iflag & (IXON | IXOFF))
mon_data_ext.flowctrl[i] |= 0x0C;
if (mxvar_table[i].type == PORT_16550A)
mon_data_ext.fifo[i] = 1;
else
mon_data_ext.fifo[i] = 0;
p = i % 4;
shiftbit = p * 2;
opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
mon_data_ext.iftype[i] = opmode;
}
if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
return -EFAULT;
return 0;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
static void mxser_stoprx(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
//unsigned long flags;
info->ldisc_stop_rx = 1;
if (I_IXOFF(tty)) {
//MX_LOCK(&info->slock);
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag) {
info->IER &= ~MOXA_MUST_RECV_ISR;
outb(info->IER, info->base + UART_IER);
} else {
// above add by Victor Yu. 09-02-2002
info->x_char = STOP_CHAR(tty);
// outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
outb(0, info->base + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
} // add by Victor Yu. 09-02-2002
//MX_UNLOCK(&info->slock);
}
if (info->tty->termios->c_cflag & CRTSCTS) {
//MX_LOCK(&info->slock);
info->MCR &= ~UART_MCR_RTS;
outb(info->MCR, info->base + UART_MCR);
//MX_UNLOCK(&info->slock);
}
}
static void mxser_startrx(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
//unsigned long flags;
info->ldisc_stop_rx = 0;
if (I_IXOFF(tty)) {
if (info->x_char)
info->x_char = 0;
else {
//MX_LOCK(&info->slock);
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag) {
info->IER |= MOXA_MUST_RECV_ISR;
outb(info->IER, info->base + UART_IER);
} else {
// above add by Victor Yu. 09-02-2002
info->x_char = START_CHAR(tty);
// outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
info->IER |= UART_IER_THRI; /* force Tx interrupt */
outb(info->IER, info->base + UART_IER);
} // add by Victor Yu. 09-02-2002
//MX_UNLOCK(&info->slock);
}
}
if (info->tty->termios->c_cflag & CRTSCTS) {
//MX_LOCK(&info->slock);
info->MCR |= UART_MCR_RTS;
outb(info->MCR, info->base + UART_MCR);
//MX_UNLOCK(&info->slock);
}
}
/*
* 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_struct *info = (struct mxser_struct *)tty->driver_data;
//unsigned long flags;
//MX_LOCK(&info->slock);
mxser_stoprx(tty);
//MX_UNLOCK(&info->slock);
}
static void mxser_unthrottle(struct tty_struct *tty)
{
//struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
//unsigned long flags;
//MX_LOCK(&info->slock);
mxser_startrx(tty);
//MX_UNLOCK(&info->slock);
}
static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
mxser_change_speed(info, old_termios);
if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
tty->hw_stopped = 0;
mxser_start(tty);
}
}
/* Handle sw stopped */
if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
tty->stopped = 0;
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag) {
spin_lock_irqsave(&info->slock, flags);
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
spin_unlock_irqrestore(&info->slock, flags);
}
// above add by Victor Yu. 09-02-2002
mxser_start(tty);
}
}
/*
* mxser_stop() and mxser_start()
*
* This routines are called before setting or resetting tty->stopped.
* They enable or disable transmitter interrupts, as necessary.
*/
static void mxser_stop(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->IER & UART_IER_THRI) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_start(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
/*
* mxser_wait_until_sent() --- wait until the transmitter is empty
*/
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long orig_jiffies, char_time;
int lsr;
if (info->type == PORT_UNKNOWN)
return;
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
* interval should also be less than the timeout.
*
* Note: we have to use pretty tight timings here to satisfy
* the NIST-PCTS.
*/
char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
char_time = char_time / 5;
if (char_time == 0)
char_time = 1;
if (timeout && timeout < char_time)
char_time = timeout;
/*
* If the transmitter hasn't cleared in twice the approximate
* amount of time to send the entire FIFO, it probably won't
* ever clear. This assumes the UART isn't doing flow
* control, which is currently the case. Hence, if it ever
* takes longer than info->timeout, this is probably due to a
* UART bug of some kind. So, we clamp the timeout parameter at
* 2*info->timeout.
*/
if (!timeout || timeout > 2 * info->timeout)
timeout = 2 * info->timeout;
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
printk("jiff=%lu...", jiffies);
#endif
while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
#endif
schedule_timeout_interruptible(char_time);
if (signal_pending(current))
break;
if (timeout && time_after(jiffies, orig_jiffies + timeout))
break;
}
set_current_state(TASK_RUNNING);
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
#endif
}
/*
* This routine is called by tty_hangup() when a hangup is signaled.
*/
void mxser_hangup(struct tty_struct *tty)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
mxser_flush_buffer(tty);
mxser_shutdown(info);
info->event = 0;
info->count = 0;
info->flags &= ~ASYNC_NORMAL_ACTIVE;
info->tty = NULL;
wake_up_interruptible(&info->open_wait);
}
// added by James 03-12-2004.
/*
* mxser_rs_break() --- routine which turns the break handling on or off
*/
static void mxser_rs_break(struct tty_struct *tty, int break_state)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (break_state == -1)
outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
else
outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
// (above) added by James.
/*
* This is the serial driver's generic interrupt routine
*/
static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
int status, iir, i;
struct mxser_struct *info;
struct mxser_struct *port;
int max, irqbits, bits, msr;
int pass_counter = 0;
int handled = IRQ_NONE;
port = NULL;
//spin_lock(&gm_lock);
for (i = 0; i < MXSER_BOARDS; i++) {
if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
port = dev_id;
break;
}
}
if (i == MXSER_BOARDS) {
goto irq_stop;
}
if (port == 0) {
goto irq_stop;
}
max = mxser_numports[mxsercfg[i].board_type - 1];
while (1) {
irqbits = inb(port->vector) & port->vectormask;
if (irqbits == port->vectormask) {
break;
}
handled = IRQ_HANDLED;
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
if (irqbits == port->vectormask) {
break;
}
if (bits & irqbits)
continue;
info = port + i;
// following add by Victor Yu. 09-13-2002
iir = inb(info->base + UART_IIR);
if (iir & UART_IIR_NO_INT)
continue;
iir &= MOXA_MUST_IIR_MASK;
if (!info->tty) {
status = inb(info->base + UART_LSR);
outb(0x27, info->base + UART_FCR);
inb(info->base + UART_MSR);
continue;
}
// above add by Victor Yu. 09-13-2002
/*
if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
info->IER |= MOXA_MUST_RECV_ISR;
outb(info->IER, info->base + UART_IER);
}
*/
/* mask by Victor Yu. 09-13-2002
if ( !info->tty ||
(inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
continue;
*/
/* mask by Victor Yu. 09-02-2002
status = inb(info->base + UART_LSR) & info->read_status_mask;
*/
// following add by Victor Yu. 09-02-2002
status = inb(info->base + UART_LSR);
if (status & UART_LSR_PE) {
info->err_shadow |= NPPI_NOTIFY_PARITY;
}
if (status & UART_LSR_FE) {
info->err_shadow |= NPPI_NOTIFY_FRAMING;
}
if (status & UART_LSR_OE) {
info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
}
if (status & UART_LSR_BI)
info->err_shadow |= NPPI_NOTIFY_BREAK;
if (info->IsMoxaMustChipFlag) {
/*
if ( (status & 0x02) && !(status & 0x01) ) {
outb(info->base+UART_FCR, 0x23);
continue;
}
*/
if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
mxser_receive_chars(info, &status);
} else {
// above add by Victor Yu. 09-02-2002
status &= info->read_status_mask;
if (status & UART_LSR_DR)
mxser_receive_chars(info, &status);
}
msr = inb(info->base + UART_MSR);
if (msr & UART_MSR_ANY_DELTA) {
mxser_check_modem_status(info, msr);
}
// following add by Victor Yu. 09-13-2002
if (info->IsMoxaMustChipFlag) {
if ((iir == 0x02) && (status & UART_LSR_THRE)) {
mxser_transmit_chars(info);
}
} else {
// above add by Victor Yu. 09-13-2002
if (status & UART_LSR_THRE) {
/* 8-2-99 by William
if ( info->x_char || (info->xmit_cnt > 0) )
*/
mxser_transmit_chars(info);
}
}
}
if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
break; /* Prevent infinite loops */
}
}
irq_stop:
//spin_unlock(&gm_lock);
return handled;
}
static void mxser_receive_chars(struct mxser_struct *info, int *status)
{
struct tty_struct *tty = info->tty;
unsigned char ch, gdl;
int ignored = 0;
int cnt = 0;
int recv_room;
int max = 256;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
recv_room = tty->ldisc.receive_room(tty);
if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
//mxser_throttle(tty);
mxser_stoprx(tty);
//return;
}
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
if (*status & UART_LSR_SPECIAL) {
goto intr_old;
}
// following add by Victor Yu. 02-11-2004
if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
goto intr_old;
// above add by Victor Yu. 02-14-2004
if (*status & MOXA_MUST_LSR_RERR)
goto intr_old;
gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004
gdl &= MOXA_MUST_GDL_MASK;
if (gdl >= recv_room) {
if (!info->ldisc_stop_rx) {
//mxser_throttle(tty);
mxser_stoprx(tty);
}
//return;
}
while (gdl--) {
ch = inb(info->base + UART_RX);
tty_insert_flip_char(tty, ch, 0);
cnt++;
/*
if((cnt>=HI_WATER) && (info->stop_rx==0)){
mxser_stoprx(tty);
info->stop_rx=1;
break;
} */
}
goto end_intr;
}
intr_old:
// above add by Victor Yu. 09-02-2002
do {
if (max-- < 0)
break;
/*
if((cnt>=HI_WATER) && (info->stop_rx==0)){
mxser_stoprx(tty);
info->stop_rx=1;
break;
}
*/
ch = inb(info->base + UART_RX);
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
outb(0x23, info->base + UART_FCR);
*status &= info->read_status_mask;
// above add by Victor Yu. 09-02-2002
if (*status & info->ignore_status_mask) {
if (++ignored > 100)
break;
} else {
char flag = 0;
if (*status & UART_LSR_SPECIAL) {
if (*status & UART_LSR_BI) {
flag = TTY_BREAK;
/* added by casper 1/11/2000 */
info->icount.brk++;
/* */
if (info->flags & ASYNC_SAK)
do_SAK(tty);
} else if (*status & UART_LSR_PE) {
flag = TTY_PARITY;
/* added by casper 1/11/2000 */
info->icount.parity++;
/* */
} else if (*status & UART_LSR_FE) {
flag = TTY_FRAME;
/* added by casper 1/11/2000 */
info->icount.frame++;
/* */
} else if (*status & UART_LSR_OE) {
flag = TTY_OVERRUN;
/* added by casper 1/11/2000 */
info->icount.overrun++;
/* */
}
}
tty_insert_flip_char(tty, ch, flag);
cnt++;
if (cnt >= recv_room) {
if (!info->ldisc_stop_rx) {
//mxser_throttle(tty);
mxser_stoprx(tty);
}
break;
}
}
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag)
break;
// above add by Victor Yu. 09-02-2002
/* mask by Victor Yu. 09-02-2002
*status = inb(info->base + UART_LSR) & info->read_status_mask;
*/
// following add by Victor Yu. 09-02-2002
*status = inb(info->base + UART_LSR);
// above add by Victor Yu. 09-02-2002
} while (*status & UART_LSR_DR);
end_intr: // add by Victor Yu. 09-02-2002
mxvar_log.rxcnt[info->port] += cnt;
info->mon_data.rxcnt += cnt;
info->mon_data.up_rxcnt += cnt;
spin_unlock_irqrestore(&info->slock, flags);
tty_flip_buffer_push(tty);
}
static void mxser_transmit_chars(struct mxser_struct *info)
{
int count, cnt;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->x_char) {
outb(info->x_char, info->base + UART_TX);
info->x_char = 0;
mxvar_log.txcnt[info->port]++;
info->mon_data.txcnt++;
info->mon_data.up_txcnt++;
/* added by casper 1/11/2000 */
info->icount.tx++;
/* */
spin_unlock_irqrestore(&info->slock, flags);
return;
}
if (info->xmit_buf == 0) {
spin_unlock_irqrestore(&info->slock, flags);
return;
}
if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
return;
}
cnt = info->xmit_cnt;
count = info->xmit_fifo_size;
do {
outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
if (--info->xmit_cnt <= 0)
break;
} while (--count > 0);
mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
// added by James 03-12-2004.
info->mon_data.txcnt += (cnt - info->xmit_cnt);
info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
// (above) added by James.
/* added by casper 1/11/2000 */
info->icount.tx += (cnt - info->xmit_cnt);
/* */
if (info->xmit_cnt < WAKEUP_CHARS) {
set_bit(MXSER_EVENT_TXLOW, &info->event);
schedule_work(&info->tqueue);
}
if (info->xmit_cnt <= 0) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_check_modem_status(struct mxser_struct *info, int status)
{
/* update input line counters */
if (status & UART_MSR_TERI)
info->icount.rng++;
if (status & UART_MSR_DDSR)
info->icount.dsr++;
if (status & UART_MSR_DDCD)
info->icount.dcd++;
if (status & UART_MSR_DCTS)
info->icount.cts++;
info->mon_data.modem_status = status;
wake_up_interruptible(&info->delta_msr_wait);
if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
if (status & UART_MSR_DCD)
wake_up_interruptible(&info->open_wait);
schedule_work(&info->tqueue);
}
if (info->flags & ASYNC_CTS_FLOW) {
if (info->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
info->tty->hw_stopped = 0;
if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
set_bit(MXSER_EVENT_TXLOW, &info->event);
schedule_work(&info->tqueue); }
} else {
if (!(status & UART_MSR_CTS)) {
info->tty->hw_stopped = 1;
if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
}
}
}
}
static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
{
DECLARE_WAITQUEUE(wait, current);
int retval;
int do_clocal = 0;
unsigned long flags;
/*
* If non-blocking mode is set, or the port is not enabled,
* then make the check up front and then exit.
*/
if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
info->flags |= ASYNC_NORMAL_ACTIVE;
return (0);
}
if (tty->termios->c_cflag & CLOCAL)
do_clocal = 1;
/*
* Block waiting for the carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
* this loop, info->count is dropped by one, so that
* mxser_close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
retval = 0;
add_wait_queue(&info->open_wait, &wait);
spin_lock_irqsave(&info->slock, flags);
if (!tty_hung_up_p(filp))
info->count--;
spin_unlock_irqrestore(&info->slock, flags);
info->blocked_open++;
while (1) {
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
if (info->flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
break;
}
if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
if (!tty_hung_up_p(filp))
info->count++;
info->blocked_open--;
if (retval)
return (retval);
info->flags |= ASYNC_NORMAL_ACTIVE;
return (0);
}
static int mxser_startup(struct mxser_struct *info)
{
unsigned long page;
unsigned long flags;
page = __get_free_page(GFP_KERNEL);
if (!page)
return (-ENOMEM);
spin_lock_irqsave(&info->slock, flags);
if (info->flags & ASYNC_INITIALIZED) {
free_page(page);
spin_unlock_irqrestore(&info->slock, flags);
return (0);
}
if (!info->base || !info->type) {
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
free_page(page);
spin_unlock_irqrestore(&info->slock, flags);
return (0);
}
if (info->xmit_buf)
free_page(page);
else
info->xmit_buf = (unsigned char *) page;
/*
* Clear the FIFO buffers and disable them
* (they will be reenabled in mxser_change_speed())
*/
if (info->IsMoxaMustChipFlag)
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
else
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + 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->base + UART_LSR) == 0xff) {
spin_unlock_irqrestore(&info->slock, flags);
if (capable(CAP_SYS_ADMIN)) {
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
return (0);
} else
return (-ENODEV);
}
/*
* Clear the interrupt registers.
*/
(void) inb(info->base + UART_LSR);
(void) inb(info->base + UART_RX);
(void) inb(info->base + UART_IIR);
(void) inb(info->base + UART_MSR);
/*
* Now, initialize the UART
*/
outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
outb(info->MCR, info->base + UART_MCR);
/*
* Finally, enable interrupts
*/
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
// info->IER = UART_IER_RLSI | UART_IER_RDI;
// following add by Victor Yu. 08-30-2002
if (info->IsMoxaMustChipFlag)
info->IER |= MOXA_MUST_IER_EGDAI;
// above add by Victor Yu. 08-30-2002
outb(info->IER, info->base + UART_IER); /* enable interrupts */
/*
* And clear the interrupt registers again for luck.
*/
(void) inb(info->base + UART_LSR);
(void) inb(info->base + UART_RX);
(void) inb(info->base + UART_IIR);
(void) inb(info->base + UART_MSR);
if (info->tty)
clear_bit(TTY_IO_ERROR, &info->tty->flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/*
* and set the speed of the serial port
*/
spin_unlock_irqrestore(&info->slock, flags);
mxser_change_speed(info, NULL);
info->flags |= ASYNC_INITIALIZED;
return (0);
}
/*
* This routine will shutdown a serial port; interrupts maybe disabled, and
* DTR is dropped if the hangup on close termio flag is on.
*/
static void mxser_shutdown(struct mxser_struct *info)
{
unsigned long flags;
if (!(info->flags & ASYNC_INITIALIZED))
return;
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->delta_msr_wait);
/*
* Free the IRQ, if necessary
*/
if (info->xmit_buf) {
free_page((unsigned long) info->xmit_buf);
info->xmit_buf = NULL;
}
info->IER = 0;
outb(0x00, info->base + UART_IER);
if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
outb(info->MCR, info->base + UART_MCR);
/* clear Rx/Tx FIFO's */
// following add by Victor Yu. 08-30-2002
if (info->IsMoxaMustChipFlag)
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
else
// above add by Victor Yu. 08-30-2002
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
/* read data port to reset things */
(void) inb(info->base + UART_RX);
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
// following add by Victor Yu. 09-23-2002
if (info->IsMoxaMustChipFlag) {
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
}
// above add by Victor Yu. 09-23-2002
spin_unlock_irqrestore(&info->slock, flags);
}
/*
* 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 mxser_struct *info, struct termios *old_termios)
{
unsigned cflag, cval, fcr;
int ret = 0;
unsigned char status;
long baud;
unsigned long flags;
if (!info->tty || !info->tty->termios)
return ret;
cflag = info->tty->termios->c_cflag;
if (!(info->base))
return ret;
#ifndef B921600
#define B921600 (B460800 +1)
#endif
if (mxser_set_baud_method[info->port] == 0) {
switch (cflag & (CBAUD | CBAUDEX)) {
case B921600:
baud = 921600;
break;
case B460800:
baud = 460800;
break;
case B230400:
baud = 230400;
break;
case B115200:
baud = 115200;
break;
case B57600:
baud = 57600;
break;
case B38400:
baud = 38400;
break;
case B19200:
baud = 19200;
break;
case B9600:
baud = 9600;
break;
case B4800:
baud = 4800;
break;
case B2400:
baud = 2400;
break;
case B1800:
baud = 1800;
break;
case B1200:
baud = 1200;
break;
case B600:
baud = 600;
break;
case B300:
baud = 300;
break;
case B200:
baud = 200;
break;
case B150:
baud = 150;
break;
case B134:
baud = 134;
break;
case B110:
baud = 110;
break;
case B75:
baud = 75;
break;
case B50:
baud = 50;
break;
default:
baud = 0;
break;
}
mxser_set_baud(info, 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... */
}
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->IsMoxaMustChipFlag) {
fcr = UART_FCR_ENABLE_FIFO;
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
SET_MOXA_MUST_FIFO_VALUE(info);
} else
fcr = 0;
} else {
fcr = UART_FCR_ENABLE_FIFO;
// following add by Victor Yu. 08-30-2002
if (info->IsMoxaMustChipFlag) {
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
SET_MOXA_MUST_FIFO_VALUE(info);
} else {
// above add by Victor Yu. 08-30-2002
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->flags |= ASYNC_CTS_FLOW;
info->IER |= UART_IER_MSI;
if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
info->MCR |= UART_MCR_AFE;
//status = mxser_get_msr(info->base, 0, info->port);
/* save_flags(flags);
cli();
status = inb(baseaddr + UART_MSR);
restore_flags(flags);*/
//mxser_check_modem_status(info, status);
} else {
//status = mxser_get_msr(info->base, 0, info->port);
//MX_LOCK(&info->slock);
status = inb(info->base + UART_MSR);
//MX_UNLOCK(&info->slock);
if (info->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
info->tty->hw_stopped = 0;
if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
info->IER |= UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
set_bit(MXSER_EVENT_TXLOW, &info->event);
schedule_work(&info->tqueue); }
} else {
if (!(status & UART_MSR_CTS)) {
info->tty->hw_stopped = 1;
if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->base + UART_IER);
}
}
}
}
} else {
info->flags &= ~ASYNC_CTS_FLOW;
}
outb(info->MCR, info->base + UART_MCR);
if (cflag & CLOCAL) {
info->flags &= ~ASYNC_CHECK_CD;
} else {
info->flags |= ASYNC_CHECK_CD;
info->IER |= UART_IER_MSI;
}
outb(info->IER, info->base + UART_IER);
/*
* Set up parity check flag
*/
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
if (I_INPCK(info->tty))
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
info->read_status_mask |= UART_LSR_BI;
info->ignore_status_mask = 0;
if (I_IGNBRK(info->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(info->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;
}
}
// following add by Victor Yu. 09-02-2002
if (info->IsMoxaMustChipFlag) {
spin_lock_irqsave(&info->slock, flags);
SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
if (I_IXON(info->tty)) {
ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
} else {
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
}
if (I_IXOFF(info->tty)) {
ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
} else {
DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
}
/*
if ( I_IXANY(info->tty) ) {
info->MCR |= MOXA_MUST_MCR_XON_ANY;
ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
} else {
info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
}
*/
spin_unlock_irqrestore(&info->slock, flags);
}
// above add by Victor Yu. 09-02-2002
outb(fcr, info->base + UART_FCR); /* set fcr */
outb(cval, info->base + UART_LCR);
return ret;
}
static int mxser_set_baud(struct mxser_struct *info, long newspd)
{
int quot = 0;
unsigned char cval;
int ret = 0;
unsigned long flags;
if (!info->tty || !info->tty->termios)
return ret;
if (!(info->base))
return ret;
if (newspd > info->MaxCanSetBaudRate)
return 0;
info->realbaud = newspd;
if (newspd == 134) {
quot = (2 * info->baud_base / 269);
} else if (newspd) {
quot = info->baud_base / newspd;
if (quot == 0)
quot = 1;
} 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) {
spin_lock_irqsave(&info->slock, flags);
info->MCR |= UART_MCR_DTR;
outb(info->MCR, info->base + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
} else {
spin_lock_irqsave(&info->slock, flags);
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->base + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
return ret;
}
cval = inb(info->base + UART_LCR);
outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
outb(cval, info->base + UART_LCR); /* reset DLAB */
return ret;
}
/*
* ------------------------------------------------------------
* friends of mxser_ioctl()
* ------------------------------------------------------------
*/
static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
if (!retinfo)
return (-EFAULT);
memset(&tmp, 0, sizeof(tmp));
tmp.type = info->type;
tmp.line = info->port;
tmp.port = info->base;
tmp.irq = info->irq;
tmp.flags = info->flags;
tmp.baud_base = info->baud_base;
tmp.close_delay = info->close_delay;
tmp.closing_wait = info->closing_wait;
tmp.custom_divisor = info->custom_divisor;
tmp.hub6 = 0;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return (0);
}
static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
unsigned int flags;
int retval = 0;
if (!new_info || !info->base)
return (-EFAULT);
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
return (-EPERM);
flags = info->flags & ASYNC_SPD_MASK;
if (!capable(CAP_SYS_ADMIN)) {
if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
return (-EPERM);
info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
} else {
/*
* OK, past this point, all the error checking has been done.
* At this point, we start making changes.....
*/
info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
info->close_delay = new_serial.close_delay * HZ / 100;
info->closing_wait = new_serial.closing_wait * HZ / 100;
info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
info->tty->low_latency = 0; //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
}
/* added by casper, 3/17/2000, for mouse */
info->type = new_serial.type;
process_txrx_fifo(info);
/* */
if (info->flags & ASYNC_INITIALIZED) {
if (flags != (info->flags & ASYNC_SPD_MASK)) {
mxser_change_speed(info, NULL);
}
} else {
retval = mxser_startup(info);
}
return (retval);
}
/*
* mxser_get_lsr_info - get line status register info
*
* Purpose: Let user call ioctl() to get info when the UART physically
* is emptied. On bus types like RS485, the transmitter must
* release the bus after transmitting. This must be done when
* the transmit shift register is empty, not be done when the
* transmit holding register is empty. This functionality
* allows an RS485 driver to be written in user space.
*/
static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
{
unsigned char status;
unsigned int result;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->base + UART_LSR);
spin_unlock_irqrestore(&info->slock, flags);
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
return put_user(result, value);
}
/*
* This routine sends a break character out the serial port.
*/
static void mxser_send_break(struct mxser_struct *info, int duration)
{
unsigned long flags;
if (!info->base)
return;
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
schedule_timeout(duration);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned char control, status;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return (-ENOIOCTLCMD);
if (tty->flags & (1 << TTY_IO_ERROR))
return (-EIO);
control = info->MCR;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->base + UART_MSR);
if (status & UART_MSR_ANY_DELTA)
mxser_check_modem_status(info, status);
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);
}
static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
{
struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
spin_lock_irqsave(&info->slock, flags);
if (set & TIOCM_RTS)
info->MCR |= UART_MCR_RTS;
if (set & TIOCM_DTR)
info->MCR |= UART_MCR_DTR;
if (clear & TIOCM_RTS)
info->MCR &= ~UART_MCR_RTS;
if (clear & TIOCM_DTR)
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->base + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
}
static int mxser_read_register(int, unsigned short *);
static int mxser_program_mode(int);
static void mxser_normal_mode(int);
static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
{
int id, i, bits;
unsigned short regs[16], irq;
unsigned char scratch, scratch2;
hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
id = mxser_read_register(cap, regs);
if (id == C168_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_C168_ISA;
hwconf->ports = 8;
} else if (id == C104_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_C104_ISA;
hwconf->ports = 4;
} else if (id == C102_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_C102_ISA;
hwconf->ports = 2;
} else if (id == CI132_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_CI132;
hwconf->ports = 2;
} else if (id == CI134_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_CI134;
hwconf->ports = 4;
} else if (id == CI104J_ASIC_ID) {
hwconf->board_type = MXSER_BOARD_CI104J;
hwconf->ports = 4;
} else
return (0);
irq = 0;
if (hwconf->ports == 2) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
if (irq != (regs[9] & 0xFF00))
return (MXSER_ERR_IRQ_CONFLIT);
} else if (hwconf->ports == 4) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if (irq != regs[9])
return (MXSER_ERR_IRQ_CONFLIT);
} else if (hwconf->ports == 8) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if ((irq != regs[9]) || (irq != regs[10]))
return (MXSER_ERR_IRQ_CONFLIT);
}
if (!irq) {
return (MXSER_ERR_IRQ);
}
hwconf->irq = ((int) (irq & 0xF000) >> 12);
for (i = 0; i < 8; i++)
hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
if ((regs[12] & 0x80) == 0) {
return (MXSER_ERR_VECTOR);
}
hwconf->vector = (int) regs[11]; /* interrupt vector */
if (id == 1)
hwconf->vector_mask = 0x00FF;
else
hwconf->vector_mask = 0x000F;
for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
if (regs[12] & bits) {
hwconf->baud_base[i] = 921600;
hwconf->MaxCanSetBaudRate[i] = 921600; // add by Victor Yu. 09-04-2002
} else {
hwconf->baud_base[i] = 115200;
hwconf->MaxCanSetBaudRate[i] = 115200; // add by Victor Yu. 09-04-2002
}
}
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)
hwconf->uart_type = PORT_16550A;
else
hwconf->uart_type = PORT_16450;
if (id == 1)
hwconf->ports = 8;
else
hwconf->ports = 4;
request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
request_region(hwconf->vector, 1, "mxser(vector)");
return (hwconf->ports);
}
#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 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_program_mode(int port)
{
int id, i, j, n;
//unsigned long flags;
spin_lock(&gm_lock);
outb(0, port);
outb(0, port);
outb(0, port);
(void) inb(port);
(void) inb(port);
outb(0, port);
(void) inb(port);
//restore_flags(flags);
spin_unlock(&gm_lock);
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 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);
}
module_init(mxser_module_init);
module_exit(mxser_module_exit);
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