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linux/drivers/char/mxser.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

3180 lines
83 KiB
C
Raw Blame History

/*
* 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/module.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) ? IRQF_SHARED : IRQF_DISABLED)
#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_param_array(ioaddr, int, NULL, 0);
module_param(ttymajor, int, 0);
module_param(calloutmajor, int, 0);
module_param(verbose, bool, 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_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 *);
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 const 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 failed, IRQ (%d) may conflict 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 = ARRAY_SIZE(mxser_pcibrds) - 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 = 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);
/*
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 = 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 = tty->driver_data;
unsigned long flags;
if (!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 = tty->driver_data;
unsigned long flags;
if (!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 = 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 = 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 = tty->driver_data;
return info->xmit_cnt;
}
static void mxser_flush_buffer(struct tty_struct *tty)
{
struct mxser_struct *info = tty->driver_data;
char fcr;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/* 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 = 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 = 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);
/* mask by Victor Yu. 09-02-2002 */
/* outb(info->IER, 0); */
outb(0, info->base + UART_IER);
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); */
}
}
static void mxser_startrx(struct tty_struct *tty)
{
struct mxser_struct *info = 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);
/* mask by Victor Yu. 09-02-2002 */
/* outb(info->IER, 0); */
/* add by Victor Yu. 09-02-2002 */
outb(0, info->base + UART_IER);
/* force Tx interrupt */
info->IER |= UART_IER_THRI;
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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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)
{
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->receive_room;
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);
/* add by Victor Yu. 02-11-2004 */
if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
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) {
baud = tty_get_baud_rate(info->tty);
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 = 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 = 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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