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android_kernel_xiaomi_sm8350/drivers/char/mxser_new.c
Alan Cox 606d099cdd [PATCH] tty: switch to ktermios 
This is the grungy swap all the occurrences in the right places patch that
goes with the updates.  At this point we have the same functionality as
before (except that sgttyb() returns speeds not zero) and are ready to
begin turning new stuff on providing nobody reports lots of bugs

If you are a tty driver author converting an out of tree driver the only
impact should be termios->ktermios name changes for the speed/property
setting functions from your upper layers.

If you are implementing your own TCGETS function before then your driver
was broken already and its about to get a whole lot more painful for you so
please fix it 8)

Also fill in c_ispeed/ospeed on init for most devices, although the current
code will do this for you anyway but I'd like eventually to lose that extra
paranoia

[akpm@osdl.org: bluetooth fix]
[mp3@de.ibm.com: sclp fix]
[mp3@de.ibm.com: warning fix for tty3270]
[hugh@veritas.com: fix tty_ioctl powerpc build]
[jdike@addtoit.com: uml: fix ->set_termios declaration]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08 08:28:57 -08:00

2805 lines
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/*
* mxser.c -- MOXA Smartio/Industio family multiport serial driver.
*
* Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw).
* Copyright (C) 2006 Jiri Slaby <jirislaby@gmail.com>
*
* This code is loosely based on the 1.8 moxa driver which is based on
* Linux serial driver, written by Linus Torvalds, Theodore T'so and
* others.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
* <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_new.h"
#define MXSER_VERSION "2.0"
#define MXSERMAJOR 174
#define MXSERCUMAJOR 175
#define MXSER_EVENT_TXLOW 1
#define MXSER_BOARDS 4 /* Max. boards */
#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
#define MXSER_ISR_PASS_LIMIT 99999L
#define MXSER_ERR_IOADDR -1
#define MXSER_ERR_IRQ -2
#define MXSER_ERR_IRQ_CONFLIT -3
#define MXSER_ERR_VECTOR -4
#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 C168_ASIC_ID 1
#define C104_ASIC_ID 2
#define C102_ASIC_ID 0xB
#define CI132_ASIC_ID 4
#define CI134_ASIC_ID 3
#define CI104J_ASIC_ID 5
#define MXSER_HIGHBAUD 1
#define MXSER_HAS2 2
/* This is only for PCI */
static const struct {
int type;
int tx_fifo;
int rx_fifo;
int xmit_fifo_size;
int rx_high_water;
int rx_trigger;
int rx_low_water;
long max_baud;
} Gpci_uart_info[] = {
{MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
{MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
{MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
};
#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
struct mxser_cardinfo {
unsigned int nports;
char *name;
unsigned int flags;
};
static const struct mxser_cardinfo mxser_cards[] = {
{ 8, "C168 series", }, /* C168-ISA */
{ 4, "C104 series", }, /* C104-ISA */
{ 4, "CI-104J series", }, /* CI104J */
{ 8, "C168H/PCI series", }, /* C168-PCI */
{ 4, "C104H/PCI series", }, /* C104-PCI */
{ 4, "C102 series", MXSER_HAS2 }, /* C102-ISA */
{ 4, "CI-132 series", MXSER_HAS2 }, /* CI132 */
{ 4, "CI-134 series", }, /* CI134 */
{ 2, "CP-132 series", }, /* CP132 */
{ 4, "CP-114 series", }, /* CP114 */
{ 4, "CT-114 series", }, /* CT114 */
{ 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
{ 4, "CP-104U series", }, /* CP104U */
{ 8, "CP-168U series", }, /* CP168U */
{ 2, "CP-132U series", }, /* CP132U */
{ 4, "CP-134U series", }, /* CP134U */
{ 4, "CP-104JU series", }, /* CP104JU */
{ 8, "Moxa UC7000 Serial", }, /* RC7000 */
{ 8, "CP-118U series", }, /* CP118U */
{ 2, "CP-102UL series", }, /* CP102UL */
{ 2, "CP-102U series", }, /* CP102U */
{ 8, "CP-118EL series", }, /* CP118EL */
{ 8, "CP-168EL series", }, /* CP168EL */
{ 4, "CP-104EL series", } /* CP104EL */
};
/* driver_data correspond to the lines in the structure above
see also ISA probe function before you change something */
static struct pci_device_id mxser_pcibrds[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
.driver_data = 3 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
.driver_data = 4 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
.driver_data = 8 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
.driver_data = 9 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
.driver_data = 10 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
.driver_data = 11 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
.driver_data = 12 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
.driver_data = 13 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
.driver_data = 14 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
.driver_data = 15 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
.driver_data = 16 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
.driver_data = 17 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
.driver_data = 18 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
.driver_data = 19 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
.driver_data = 20 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
.driver_data = 21 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
.driver_data = 22 },
{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
.driver_data = 23 },
{ }
};
MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
static int ttymajor = MXSERMAJOR;
static int calloutmajor = MXSERCUMAJOR;
/* 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_LICENSE("GPL");
struct mxser_log {
int tick;
unsigned long rxcnt[MXSER_PORTS];
unsigned long txcnt[MXSER_PORTS];
};
struct mxser_mon {
unsigned long rxcnt;
unsigned long txcnt;
unsigned long up_rxcnt;
unsigned long up_txcnt;
int modem_status;
unsigned char hold_reason;
};
struct mxser_mon_ext {
unsigned long rx_cnt[32];
unsigned long tx_cnt[32];
unsigned long up_rxcnt[32];
unsigned long up_txcnt[32];
int modem_status[32];
long baudrate[32];
int databits[32];
int stopbits[32];
int parity[32];
int flowctrl[32];
int fifo[32];
int iftype[32];
};
struct mxser_board;
struct mxser_port {
struct mxser_board *board;
struct tty_struct *tty;
unsigned long ioaddr;
unsigned long opmode_ioaddr;
int max_baud;
int rx_high_water;
int rx_trigger; /* Rx fifo trigger level */
int rx_low_water;
int baud_base; /* max. speed */
long realbaud;
int type; /* UART type */
int flags; /* defined in tty.h */
long session; /* Session of opening process */
long pgrp; /* pgrp of opening process */
int x_char; /* xon/xoff character */
int IER; /* Interrupt Enable Register */
int MCR; /* Modem control register */
unsigned char stop_rx;
unsigned char ldisc_stop_rx;
int custom_divisor;
int close_delay;
unsigned short closing_wait;
unsigned char err_shadow;
unsigned long event;
int count; /* # of fd on device */
int blocked_open; /* # of blocked opens */
struct async_icount icount; /* kernel counters for 4 input interrupts */
int timeout;
int read_status_mask;
int ignore_status_mask;
int xmit_fifo_size;
unsigned char *xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
struct ktermios normal_termios;
struct ktermios callout_termios;
struct mxser_mon mon_data;
spinlock_t slock;
struct work_struct tqueue;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
wait_queue_head_t delta_msr_wait;
};
struct mxser_board {
unsigned int idx;
int irq;
const struct mxser_cardinfo *info;
unsigned long vector;
unsigned long vector_mask;
int chip_flag;
int uart_type;
struct mxser_port ports[MXSER_PORTS_PER_BOARD];
};
struct mxser_mstatus {
tcflag_t cflag;
int cts;
int dsr;
int ri;
int dcd;
};
static struct mxser_mstatus GMStatus[MXSER_PORTS];
static int mxserBoardCAP[MXSER_BOARDS] = {
0, 0, 0, 0
/* 0x180, 0x280, 0x200, 0x320 */
};
static struct mxser_board mxser_boards[MXSER_BOARDS];
static struct tty_driver *mxvar_sdriver;
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;
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 = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
if (hwid == Gpci_uart_info[i].type)
return (int)hwid;
}
return MOXA_OTHER_UART;
}
static void process_txrx_fifo(struct mxser_port *info)
{
int i;
if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
info->rx_trigger = 1;
info->rx_high_water = 1;
info->rx_low_water = 1;
info->xmit_fifo_size = 1;
} else
for (i = 0; i < UART_INFO_NUM; i++)
if (info->board->chip_flag == Gpci_uart_info[i].type) {
info->rx_trigger = Gpci_uart_info[i].rx_trigger;
info->rx_low_water = Gpci_uart_info[i].rx_low_water;
info->rx_high_water = Gpci_uart_info[i].rx_high_water;
info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
break;
}
}
static void mxser_do_softint(struct work_struct *work)
{
struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
struct tty_struct *tty = info->tty;
if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
tty_wakeup(tty);
}
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
{
unsigned char status = 0;
status = inb(baseaddr + UART_MSR);
mxser_msr[port] &= 0x0F;
mxser_msr[port] |= status;
status = mxser_msr[port];
if (mode)
mxser_msr[port] = 0;
return status;
}
static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
struct mxser_port *port)
{
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) ||
test_bit(TTY_IO_ERROR, &tty->flags)) {
port->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, port->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(&port->open_wait, &wait);
spin_lock_irqsave(&port->slock, flags);
if (!tty_hung_up_p(filp))
port->count--;
spin_unlock_irqrestore(&port->slock, flags);
port->blocked_open++;
while (1) {
spin_lock_irqsave(&port->slock, flags);
outb(inb(port->ioaddr + UART_MCR) |
UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
spin_unlock_irqrestore(&port->slock, flags);
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
if (port->flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
break;
}
if (!(port->flags & ASYNC_CLOSING) &&
(do_clocal ||
(inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&port->open_wait, &wait);
if (!tty_hung_up_p(filp))
port->count++;
port->blocked_open--;
if (retval)
return retval;
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
static int mxser_set_baud(struct mxser_port *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->ioaddr))
return ret;
if (newspd > info->max_baud)
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->ioaddr + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
} else {
spin_lock_irqsave(&info->slock, flags);
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
return ret;
}
cval = inb(info->ioaddr + UART_LCR);
outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
return ret;
}
/*
* 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_port *info,
struct ktermios *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->ioaddr))
return ret;
if (mxser_set_baud_method[info->tty->index] == 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->board->chip_flag) {
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;
if (info->board->chip_flag) {
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
SET_MOXA_MUST_FIFO_VALUE(info);
} else {
switch (info->rx_trigger) {
case 1:
fcr |= UART_FCR_TRIGGER_1;
break;
case 4:
fcr |= UART_FCR_TRIGGER_4;
break;
case 8:
fcr |= UART_FCR_TRIGGER_8;
break;
default:
fcr |= UART_FCR_TRIGGER_14;
break;
}
}
}
/* CTS flow control flag and modem status interrupts */
info->IER &= ~UART_IER_MSI;
info->MCR &= ~UART_MCR_AFE;
if (cflag & CRTSCTS) {
info->flags |= ASYNC_CTS_FLOW;
info->IER |= UART_IER_MSI;
if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
info->MCR |= UART_MCR_AFE;
} else {
status = inb(info->ioaddr + UART_MSR);
if (info->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
info->tty->hw_stopped = 0;
if (info->type != PORT_16550A &&
!info->board->chip_flag) {
outb(info->IER & ~UART_IER_THRI,
info->ioaddr +
UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr +
UART_IER);
}
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->board->chip_flag)) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->ioaddr +
UART_IER);
}
}
}
}
} else {
info->flags &= ~ASYNC_CTS_FLOW;
}
outb(info->MCR, info->ioaddr + 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->ioaddr + 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;
}
}
if (info->board->chip_flag) {
spin_lock_irqsave(&info->slock, flags);
SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
if (I_IXON(info->tty)) {
ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
} else {
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
}
if (I_IXOFF(info->tty)) {
ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
} else {
DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
}
spin_unlock_irqrestore(&info->slock, flags);
}
outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
outb(cval, info->ioaddr + UART_LCR);
return ret;
}
static void mxser_check_modem_status(struct mxser_port *port, int status)
{
/* update input line counters */
if (status & UART_MSR_TERI)
port->icount.rng++;
if (status & UART_MSR_DDSR)
port->icount.dsr++;
if (status & UART_MSR_DDCD)
port->icount.dcd++;
if (status & UART_MSR_DCTS)
port->icount.cts++;
port->mon_data.modem_status = status;
wake_up_interruptible(&port->delta_msr_wait);
if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
if (status & UART_MSR_DCD)
wake_up_interruptible(&port->open_wait);
schedule_work(&port->tqueue);
}
if (port->flags & ASYNC_CTS_FLOW) {
if (port->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
port->tty->hw_stopped = 0;
if ((port->type != PORT_16550A) &&
(!port->board->chip_flag)) {
outb(port->IER & ~UART_IER_THRI,
port->ioaddr + UART_IER);
port->IER |= UART_IER_THRI;
outb(port->IER, port->ioaddr +
UART_IER);
}
set_bit(MXSER_EVENT_TXLOW, &port->event);
schedule_work(&port->tqueue);
}
} else {
if (!(status & UART_MSR_CTS)) {
port->tty->hw_stopped = 1;
if (port->type != PORT_16550A &&
!port->board->chip_flag) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr +
UART_IER);
}
}
}
}
}
static int mxser_startup(struct mxser_port *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->ioaddr || !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->board->chip_flag)
outb((UART_FCR_CLEAR_RCVR |
UART_FCR_CLEAR_XMIT |
MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
else
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
info->ioaddr + UART_FCR);
/*
* At this point there's no way the LSR could still be 0xFF;
* if it is, then bail out, because there's likely no UART
* here.
*/
if (inb(info->ioaddr + UART_LSR) == 0xff) {
spin_unlock_irqrestore(&info->slock, flags);
if (capable(CAP_SYS_ADMIN)) {
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
return 0;
} else
return -ENODEV;
}
/*
* Clear the interrupt registers.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
/*
* Now, initialize the UART
*/
outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
/*
* Finally, enable interrupts
*/
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
if (info->board->chip_flag)
info->IER |= MOXA_MUST_IER_EGDAI;
outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
/*
* And clear the interrupt registers again for luck.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
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_port *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->ioaddr + UART_IER);
if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
outb(info->MCR, info->ioaddr + UART_MCR);
/* clear Rx/Tx FIFO's */
if (info->board->chip_flag)
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
MOXA_MUST_FCR_GDA_MODE_ENABLE,
info->ioaddr + UART_FCR);
else
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
info->ioaddr + UART_FCR);
/* read data port to reset things */
(void) inb(info->ioaddr + UART_RX);
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
if (info->board->chip_flag)
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
spin_unlock_irqrestore(&info->slock, flags);
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/
static int mxser_open(struct tty_struct *tty, struct file *filp)
{
struct mxser_port *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 = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
if (!info->ioaddr)
return -ENODEV;
tty->driver_data = info;
info->tty = tty;
/*
* Start up serial port
*/
info->count++;
retval = mxser_startup(info);
if (retval)
return retval;
retval = mxser_block_til_ready(tty, filp, info);
if (retval)
return retval;
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 = process_session(current);
info->pgrp = process_group(current);
/* 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_port *info = tty->driver_data;
unsigned long timeout;
unsigned long flags;
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", tty->index, 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->board->chip_flag)
info->IER &= ~MOXA_MUST_RECV_ISR;
if (info->flags & ASYNC_INITIALIZED) {
outb(info->IER, info->ioaddr + UART_IER);
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
timeout = jiffies + HZ;
while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
schedule_timeout_interruptible(5);
if (time_after(jiffies, timeout))
break;
}
}
mxser_shutdown(info);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
tty_ldisc_flush(tty);
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_port *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) {
if (!tty->hw_stopped ||
(info->type == PORT_16550A) ||
(info->board->chip_flag)) {
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr +
UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
return total;
}
static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
{
struct mxser_port *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) {
if (!tty->hw_stopped ||
(info->type == PORT_16550A) ||
info->board->chip_flag) {
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
}
static void mxser_flush_chars(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
if (info->xmit_cnt <= 0 ||
tty->stopped ||
!info->xmit_buf ||
(tty->hw_stopped &&
(info->type != PORT_16550A) &&
(!info->board->chip_flag)
))
return;
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_write_room(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
int ret;
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
if (ret < 0)
ret = 0;
return ret;
}
static int mxser_chars_in_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
return info->xmit_cnt;
}
static void mxser_flush_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
char fcr;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
fcr = inb(info->ioaddr + UART_FCR);
outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
info->ioaddr + UART_FCR);
outb(fcr, info->ioaddr + UART_FCR);
spin_unlock_irqrestore(&info->slock, flags);
tty_wakeup(tty);
}
/*
* ------------------------------------------------------------
* friends of mxser_ioctl()
* ------------------------------------------------------------
*/
static int mxser_get_serial_info(struct mxser_port *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->tty->index;
tmp.port = info->ioaddr;
tmp.irq = info->board->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_port *info,
struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
unsigned int flags;
int retval = 0;
if (!new_info || !info->ioaddr)
return -EFAULT;
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
if ((new_serial.irq != info->board->irq) ||
(new_serial.port != info->ioaddr) ||
(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->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_port *info,
unsigned int __user *value)
{
unsigned char status;
unsigned int result;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->ioaddr + 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_port *info, int duration)
{
unsigned long flags;
if (!info->ioaddr)
return;
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
schedule_timeout(duration);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
{
struct mxser_port *info = tty->driver_data;
unsigned char control, status;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
if (test_bit(TTY_IO_ERROR, &tty->flags))
return -EIO;
control = info->MCR;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->ioaddr + UART_MSR);
if (status & UART_MSR_ANY_DELTA)
mxser_check_modem_status(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_port *info = tty->driver_data;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
if (test_bit(TTY_IO_ERROR, &tty->flags))
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->ioaddr + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
}
static int mxser_program_mode(int port)
{
int id, i, j, n;
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);
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);
}
#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_ioctl_special(unsigned int cmd, void __user *argp)
{
struct mxser_port *port;
int result, status;
unsigned int i, j;
switch (cmd) {
case MOXA_GET_CONF:
/* if (copy_to_user(argp, mxsercfg,
sizeof(struct mxser_hwconf) * 4))
return -EFAULT;
return 0;*/
return -ENXIO;
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_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
if (mxser_boards[i].ports[j].ioaddr)
result |= (1 << i);
return put_user(result, (unsigned long __user *)argp);
case MOXA_GETDATACOUNT:
if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
return -EFAULT;
return 0;
case MOXA_GETMSTATUS:
for (i = 0; i < MXSER_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
port = &mxser_boards[i].ports[j];
GMStatus[i].ri = 0;
if (!port->ioaddr) {
GMStatus[i].dcd = 0;
GMStatus[i].dsr = 0;
GMStatus[i].cts = 0;
continue;
}
if (!port->tty || !port->tty->termios)
GMStatus[i].cflag =
port->normal_termios.c_cflag;
else
GMStatus[i].cflag =
port->tty->termios->c_cflag;
status = inb(port->ioaddr + 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, p, shiftbit;
unsigned long opmode;
unsigned cflag, iflag;
for (i = 0; i < MXSER_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
port = &mxser_boards[i].ports[j];
if (!port->ioaddr)
continue;
status = mxser_get_msr(port->ioaddr, 0, i);
if (status & UART_MSR_TERI)
port->icount.rng++;
if (status & UART_MSR_DDSR)
port->icount.dsr++;
if (status & UART_MSR_DDCD)
port->icount.dcd++;
if (status & UART_MSR_DCTS)
port->icount.cts++;
port->mon_data.modem_status = status;
mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
mon_data_ext.up_rxcnt[i] =
port->mon_data.up_rxcnt;
mon_data_ext.up_txcnt[i] =
port->mon_data.up_txcnt;
mon_data_ext.modem_status[i] =
port->mon_data.modem_status;
mon_data_ext.baudrate[i] = port->realbaud;
if (!port->tty || !port->tty->termios) {
cflag = port->normal_termios.c_cflag;
iflag = port->normal_termios.c_iflag;
} else {
cflag = port->tty->termios->c_cflag;
iflag = port->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 (port->type == PORT_16550A)
mon_data_ext.fifo[i] = 1;
else
mon_data_ext.fifo[i] = 0;
p = i % 4;
shiftbit = p * 2;
opmode = inb(port->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
mon_data_ext.iftype[i] = opmode;
}
if (copy_to_user(argp, &mon_data_ext,
sizeof(mon_data_ext)))
return -EFAULT;
return 0;
} default:
return -ENOIOCTLCMD;
}
return 0;
}
static int mxser_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct mxser_port *info = tty->driver_data;
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;
int retval;
if (tty->index == MXSER_PORTS)
return mxser_ioctl_special(cmd, argp);
if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
int p;
unsigned long opmode;
static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
int shiftbit;
unsigned char val, mask;
p = tty->index % 4;
if (cmd == MOXA_SET_OP_MODE) {
if (get_user(opmode, (int __user *) argp))
return -EFAULT;
if (opmode != RS232_MODE &&
opmode != RS485_2WIRE_MODE &&
opmode != RS422_MODE &&
opmode != RS485_4WIRE_MODE)
return -EFAULT;
mask = ModeMask[p];
shiftbit = p * 2;
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;
}
if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
test_bit(TTY_IO_ERROR, &tty->flags))
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;
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;
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->ioaddr + 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;
status = mxser_get_msr(info->ioaddr, 1, tty->index);
mxser_check_modem_status(info, status);
mcr = inb(info->ioaddr + 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[tty->index] = method;
if (copy_to_user(argp, &method, sizeof(int)))
return -EFAULT;
return 0;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
static void mxser_stoprx(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
info->ldisc_stop_rx = 1;
if (I_IXOFF(tty)) {
if (info->board->chip_flag) {
info->IER &= ~MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
info->x_char = STOP_CHAR(tty);
outb(0, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
}
if (info->tty->termios->c_cflag & CRTSCTS) {
info->MCR &= ~UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
}
}
/*
* This routine is called by the upper-layer tty layer to signal that
* incoming characters should be throttled.
*/
static void mxser_throttle(struct tty_struct *tty)
{
mxser_stoprx(tty);
}
static void mxser_unthrottle(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
/* startrx */
info->ldisc_stop_rx = 0;
if (I_IXOFF(tty)) {
if (info->x_char)
info->x_char = 0;
else {
if (info->board->chip_flag) {
info->IER |= MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
info->x_char = START_CHAR(tty);
outb(0, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
}
}
if (info->tty->termios->c_cflag & CRTSCTS) {
info->MCR |= UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
}
}
/*
* 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_port *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->ioaddr + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_start(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->xmit_cnt && info->xmit_buf) {
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
struct mxser_port *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;
if (info->board->chip_flag) {
spin_lock_irqsave(&info->slock, flags);
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
spin_unlock_irqrestore(&info->slock, flags);
}
mxser_start(tty);
}
}
/*
* mxser_wait_until_sent() --- wait until the transmitter is empty
*/
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct mxser_port *info = tty->driver_data;
unsigned long orig_jiffies, char_time;
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->ioaddr + 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_port *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);
}
/*
* 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_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (break_state == -1)
outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
info->ioaddr + UART_LCR);
else
outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_receive_chars(struct mxser_port *port, int *status)
{
struct tty_struct *tty = port->tty;
unsigned char ch, gdl;
int ignored = 0;
int cnt = 0;
int recv_room;
int max = 256;
unsigned long flags;
spin_lock_irqsave(&port->slock, flags);
recv_room = tty->receive_room;
if ((recv_room == 0) && (!port->ldisc_stop_rx))
mxser_stoprx(tty);
if (port->board->chip_flag != MOXA_OTHER_UART) {
if (*status & UART_LSR_SPECIAL)
goto intr_old;
if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
(*status & MOXA_MUST_LSR_RERR))
goto intr_old;
if (*status & MOXA_MUST_LSR_RERR)
goto intr_old;
gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
gdl &= MOXA_MUST_GDL_MASK;
if (gdl >= recv_room) {
if (!port->ldisc_stop_rx)
mxser_stoprx(tty);
}
while (gdl--) {
ch = inb(port->ioaddr + UART_RX);
tty_insert_flip_char(tty, ch, 0);
cnt++;
}
goto end_intr;
}
intr_old:
do {
if (max-- < 0)
break;
ch = inb(port->ioaddr + UART_RX);
if (port->board->chip_flag && (*status & UART_LSR_OE))
outb(0x23, port->ioaddr + UART_FCR);
*status &= port->read_status_mask;
if (*status & port->ignore_status_mask) {
if (++ignored > 100)
break;
} else {
char flag = 0;
if (*status & UART_LSR_SPECIAL) {
if (*status & UART_LSR_BI) {
flag = TTY_BREAK;
port->icount.brk++;
if (port->flags & ASYNC_SAK)
do_SAK(tty);
} else if (*status & UART_LSR_PE) {
flag = TTY_PARITY;
port->icount.parity++;
} else if (*status & UART_LSR_FE) {
flag = TTY_FRAME;
port->icount.frame++;
} else if (*status & UART_LSR_OE) {
flag = TTY_OVERRUN;
port->icount.overrun++;
}
}
tty_insert_flip_char(tty, ch, flag);
cnt++;
if (cnt >= recv_room) {
if (!port->ldisc_stop_rx)
mxser_stoprx(tty);
break;
}
}
if (port->board->chip_flag)
break;
*status = inb(port->ioaddr + UART_LSR);
} while (*status & UART_LSR_DR);
end_intr:
mxvar_log.rxcnt[port->tty->index] += cnt;
port->mon_data.rxcnt += cnt;
port->mon_data.up_rxcnt += cnt;
spin_unlock_irqrestore(&port->slock, flags);
tty_flip_buffer_push(tty);
}
static void mxser_transmit_chars(struct mxser_port *port)
{
int count, cnt;
unsigned long flags;
spin_lock_irqsave(&port->slock, flags);
if (port->x_char) {
outb(port->x_char, port->ioaddr + UART_TX);
port->x_char = 0;
mxvar_log.txcnt[port->tty->index]++;
port->mon_data.txcnt++;
port->mon_data.up_txcnt++;
port->icount.tx++;
goto unlock;
}
if (port->xmit_buf == 0)
goto unlock;
if ((port->xmit_cnt <= 0) || port->tty->stopped ||
(port->tty->hw_stopped &&
(port->type != PORT_16550A) &&
(!port->board->chip_flag))) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr + UART_IER);
goto unlock;
}
cnt = port->xmit_cnt;
count = port->xmit_fifo_size;
do {
outb(port->xmit_buf[port->xmit_tail++],
port->ioaddr + UART_TX);
port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
if (--port->xmit_cnt <= 0)
break;
} while (--count > 0);
mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
port->mon_data.txcnt += (cnt - port->xmit_cnt);
port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
port->icount.tx += (cnt - port->xmit_cnt);
if (port->xmit_cnt < WAKEUP_CHARS) {
set_bit(MXSER_EVENT_TXLOW, &port->event);
schedule_work(&port->tqueue);
}
if (port->xmit_cnt <= 0) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr + UART_IER);
}
unlock:
spin_unlock_irqrestore(&port->slock, flags);
}
/*
* 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_board *brd = NULL;
struct mxser_port *port;
int max, irqbits, bits, msr;
int pass_counter = 0;
unsigned int int_cnt;
int handled = IRQ_NONE;
for (i = 0; i < MXSER_BOARDS; i++)
if (dev_id == &mxser_boards[i]) {
brd = dev_id;
break;
}
if (i == MXSER_BOARDS)
goto irq_stop;
if (brd == NULL)
goto irq_stop;
max = brd->info->nports;
while (1) {
irqbits = inb(brd->vector) & brd->vector_mask;
if (irqbits == brd->vector_mask)
break;
handled = IRQ_HANDLED;
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
if (irqbits == brd->vector_mask)
break;
if (bits & irqbits)
continue;
port = &brd->ports[i];
int_cnt = 0;
do {
iir = inb(port->ioaddr + UART_IIR);
if (iir & UART_IIR_NO_INT)
break;
iir &= MOXA_MUST_IIR_MASK;
if (!port->tty) {
status = inb(port->ioaddr + UART_LSR);
outb(0x27, port->ioaddr + UART_FCR);
inb(port->ioaddr + UART_MSR);
break;
}
status = inb(port->ioaddr + UART_LSR);
if (status & UART_LSR_PE)
port->err_shadow |= NPPI_NOTIFY_PARITY;
if (status & UART_LSR_FE)
port->err_shadow |= NPPI_NOTIFY_FRAMING;
if (status & UART_LSR_OE)
port->err_shadow |=
NPPI_NOTIFY_HW_OVERRUN;
if (status & UART_LSR_BI)
port->err_shadow |= NPPI_NOTIFY_BREAK;
if (port->board->chip_flag) {
if (iir == MOXA_MUST_IIR_GDA ||
iir == MOXA_MUST_IIR_RDA ||
iir == MOXA_MUST_IIR_RTO ||
iir == MOXA_MUST_IIR_LSR)
mxser_receive_chars(port,
&status);
} else {
status &= port->read_status_mask;
if (status & UART_LSR_DR)
mxser_receive_chars(port,
&status);
}
msr = inb(port->ioaddr + UART_MSR);
if (msr & UART_MSR_ANY_DELTA)
mxser_check_modem_status(port, msr);
if (port->board->chip_flag) {
if (iir == 0x02 && (status &
UART_LSR_THRE))
mxser_transmit_chars(port);
} else {
if (status & UART_LSR_THRE)
mxser_transmit_chars(port);
}
} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
}
if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
break; /* Prevent infinite loops */
}
irq_stop:
return handled;
}
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 void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
unsigned int irq)
{
if (irq)
free_irq(brd->irq, brd);
if (pdev != NULL) { /* PCI */
pci_release_region(pdev, 2);
pci_release_region(pdev, 3);
pci_dev_put(pdev);
} else {
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
release_region(brd->vector, 1);
}
}
static int __devinit mxser_initbrd(struct mxser_board *brd,
struct pci_dev *pdev)
{
struct mxser_port *info;
unsigned int i;
int retval;
printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
for (i = 0; i < brd->info->nports; i++) {
info = &brd->ports[i];
info->board = brd;
info->stop_rx = 0;
info->ldisc_stop_rx = 0;
/* Enhance mode enabled here */
if (brd->chip_flag != MOXA_OTHER_UART)
ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
info->flags = ASYNC_SHARE_IRQ;
info->type = brd->uart_type;
process_txrx_fifo(info);
info->custom_divisor = info->baud_base * 16;
info->close_delay = 5 * HZ / 10;
info->closing_wait = 30 * HZ;
INIT_WORK(&info->tqueue, mxser_do_softint);
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);
/* before set INT ISR, disable all int */
outb(inb(info->ioaddr + UART_IER) & 0xf0,
info->ioaddr + UART_IER);
}
/*
* Allocate the IRQ if necessary
*/
retval = request_irq(brd->irq, mxser_interrupt,
(brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
IRQF_DISABLED, "mxser", brd);
if (retval) {
printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
"conflict with another device.\n",
brd->info->name, brd->irq);
/* We hold resources, we need to release them. */
mxser_release_res(brd, pdev, 0);
return retval;
}
return 0;
}
static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
{
int id, i, bits;
unsigned short regs[16], irq;
unsigned char scratch, scratch2;
brd->chip_flag = MOXA_OTHER_UART;
id = mxser_read_register(cap, regs);
switch (id) {
case C168_ASIC_ID:
brd->info = &mxser_cards[0];
break;
case C104_ASIC_ID:
brd->info = &mxser_cards[1];
break;
case CI104J_ASIC_ID:
brd->info = &mxser_cards[2];
break;
case C102_ASIC_ID:
brd->info = &mxser_cards[5];
break;
case CI132_ASIC_ID:
brd->info = &mxser_cards[6];
break;
case CI134_ASIC_ID:
brd->info = &mxser_cards[7];
break;
default:
return 0;
}
irq = 0;
/* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
Flag-hack checks if configuration should be read as 2-port here. */
if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
if (irq != (regs[9] & 0xFF00))
return MXSER_ERR_IRQ_CONFLIT;
} else if (brd->info->nports == 4) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if (irq != regs[9])
return MXSER_ERR_IRQ_CONFLIT;
} else if (brd->info->nports == 8) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if ((irq != regs[9]) || (irq != regs[10]))
return MXSER_ERR_IRQ_CONFLIT;
}
if (!irq)
return MXSER_ERR_IRQ;
brd->irq = ((int)(irq & 0xF000) >> 12);
for (i = 0; i < 8; i++)
brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
if ((regs[12] & 0x80) == 0)
return MXSER_ERR_VECTOR;
brd->vector = (int)regs[11]; /* interrupt vector */
if (id == 1)
brd->vector_mask = 0x00FF;
else
brd->vector_mask = 0x000F;
for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
if (regs[12] & bits) {
brd->ports[i].baud_base = 921600;
brd->ports[i].max_baud = 921600;
} else {
brd->ports[i].baud_base = 115200;
brd->ports[i].max_baud = 115200;
}
}
scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
outb(0, cap + UART_EFR); /* EFR is the same as FCR */
outb(scratch2, cap + UART_LCR);
outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
scratch = inb(cap + UART_IIR);
if (scratch & 0xC0)
brd->uart_type = PORT_16550A;
else
brd->uart_type = PORT_16450;
if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
"mxser(IO)"))
return MXSER_ERR_IOADDR;
if (!request_region(brd->vector, 1, "mxser(vector)")) {
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
return MXSER_ERR_VECTOR;
}
return brd->info->nports;
}
static int __devinit mxser_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct mxser_board *brd;
unsigned int i, j;
unsigned long ioaddress;
int retval = -EINVAL;
for (i = 0; i < MXSER_BOARDS; i++)
if (mxser_boards[i].info == NULL)
break;
if (i >= MXSER_BOARDS) {
printk(KERN_ERR "Too many Smartio/Industio family boards found "
"(maximum %d), board not configured\n", MXSER_BOARDS);
goto err;
}
brd = &mxser_boards[i];
brd->idx = i * MXSER_PORTS_PER_BOARD;
printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
mxser_cards[ent->driver_data].name,
pdev->bus->number, PCI_SLOT(pdev->devfn));
retval = pci_enable_device(pdev);
if (retval) {
printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
goto err;
}
/* io address */
ioaddress = pci_resource_start(pdev, 2);
retval = pci_request_region(pdev, 2, "mxser(IO)");
if (retval)
goto err;
brd->info = &mxser_cards[ent->driver_data];
for (i = 0; i < brd->info->nports; i++)
brd->ports[i].ioaddr = ioaddress + 8 * i;
/* vector */
ioaddress = pci_resource_start(pdev, 3);
retval = pci_request_region(pdev, 3, "mxser(vector)");
if (retval)
goto err_relio;
brd->vector = ioaddress;
/* irq */
brd->irq = pdev->irq;
brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
brd->uart_type = PORT_16550A;
brd->vector_mask = 0;
for (i = 0; i < brd->info->nports; i++) {
for (j = 0; j < UART_INFO_NUM; j++) {
if (Gpci_uart_info[j].type == brd->chip_flag) {
brd->ports[i].max_baud =
Gpci_uart_info[j].max_baud;
/* exception....CP-102 */
if (brd->info->flags & MXSER_HIGHBAUD)
brd->ports[i].max_baud = 921600;
break;
}
}
}
if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
for (i = 0; i < brd->info->nports; i++) {
if (i < 4)
brd->ports[i].opmode_ioaddr = ioaddress + 4;
else
brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
}
outb(0, ioaddress + 4); /* default set to RS232 mode */
outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
}
for (i = 0; i < brd->info->nports; i++) {
brd->vector_mask |= (1 << i);
brd->ports[i].baud_base = 921600;
}
/* mxser_initbrd will hook ISR. */
if (mxser_initbrd(brd, pdev) < 0)
goto err_relvec;
for (i = 0; i < brd->info->nports; i++)
tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
pci_set_drvdata(pdev, brd);
return 0;
err_relvec:
pci_release_region(pdev, 3);
err_relio:
pci_release_region(pdev, 2);
brd->info = NULL;
err:
return retval;
}
static void __devexit mxser_remove(struct pci_dev *pdev)
{
struct mxser_board *brd = pci_get_drvdata(pdev);
unsigned int i;
for (i = 0; i < brd->info->nports; i++)
tty_unregister_device(mxvar_sdriver, brd->idx + i);
mxser_release_res(brd, pdev, 1);
}
static struct pci_driver mxser_driver = {
.name = "mxser",
.id_table = mxser_pcibrds,
.probe = mxser_probe,
.remove = __devexit_p(mxser_remove)
};
static int __init mxser_module_init(void)
{
struct mxser_board *brd;
unsigned long cap;
unsigned int i, m, isaloop;
int retval, b;
pr_debug("Loading module mxser ...\n");
mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
if (!mxvar_sdriver)
return -ENOMEM;
spin_lock_init(&gm_lock);
printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
MXSER_VERSION);
/* Initialize the tty_driver structure */
mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
mxvar_sdriver->name = "ttyMI";
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_DRIVER_DYNAMIC_DEV;
tty_set_operations(mxvar_sdriver, &mxser_ops);
retval = tty_register_driver(mxvar_sdriver);
if (retval) {
printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
"tty driver !\n");
goto err_put;
}
mxvar_diagflag = 0;
m = 0;
/* Start finding ISA boards here */
for (isaloop = 0; isaloop < 2; isaloop++)
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
if (!isaloop)
cap = mxserBoardCAP[b]; /* predefined */
else
cap = ioaddr[b]; /* module param */
if (!cap)
continue;
brd = &mxser_boards[m];
retval = mxser_get_ISA_conf(cap, brd);
if (retval != 0)
printk(KERN_INFO "Found MOXA %s board "
"(CAP=0x%x)\n",
brd->info->name, 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");
brd->info = NULL;
continue;
}
/* mxser_initbrd will hook ISR. */
if (mxser_initbrd(brd, NULL) < 0) {
brd->info = NULL;
continue;
}
brd->idx = m * MXSER_PORTS_PER_BOARD;
for (i = 0; i < brd->info->nports; i++)
tty_register_device(mxvar_sdriver, brd->idx + i,
NULL);
m++;
}
retval = pci_register_driver(&mxser_driver);
if (retval) {
printk(KERN_ERR "Can't register pci driver\n");
if (!m) {
retval = -ENODEV;
goto err_unr;
} /* else: we have some ISA cards under control */
}
pr_debug("Done.\n");
return 0;
err_unr:
tty_unregister_driver(mxvar_sdriver);
err_put:
put_tty_driver(mxvar_sdriver);
return retval;
}
static void __exit mxser_module_exit(void)
{
unsigned int i, j;
pr_debug("Unloading module mxser ...\n");
pci_unregister_driver(&mxser_driver);
for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
if (mxser_boards[i].info != NULL)
for (j = 0; j < mxser_boards[i].info->nports; j++)
tty_unregister_device(mxvar_sdriver,
mxser_boards[i].idx + j);
tty_unregister_driver(mxvar_sdriver);
put_tty_driver(mxvar_sdriver);
for (i = 0; i < MXSER_BOARDS; i++)
if (mxser_boards[i].info != NULL)
mxser_release_res(&mxser_boards[i], NULL, 1);
pr_debug("Done.\n");
}
module_init(mxser_module_init);
module_exit(mxser_module_exit);
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