/*
|
/*
|
* linux/arch/arm/drivers/char/serial.c
|
* linux/arch/arm/drivers/char/serial.c
|
*
|
*
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
*
|
*
|
* Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now
|
* Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now
|
* much more extensible to support other serial cards based on the
|
* much more extensible to support other serial cards based on the
|
* 16450/16550A UART's. Added support for the AST FourPort and the
|
* 16450/16550A UART's. Added support for the AST FourPort and the
|
* Accent Async board.
|
* Accent Async board.
|
*
|
*
|
* set_serial_info fixed to set the flags, custom divisor, and uart
|
* set_serial_info fixed to set the flags, custom divisor, and uart
|
* type fields. Fix suggested by Michael K. Johnson 12/12/92.
|
* type fields. Fix suggested by Michael K. Johnson 12/12/92.
|
*
|
*
|
* 11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk>
|
* 11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk>
|
*
|
*
|
* 03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk>
|
* 03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk>
|
*
|
*
|
* rs_set_termios fixed to look also for changes of the input
|
* rs_set_termios fixed to look also for changes of the input
|
* flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK.
|
* flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK.
|
* Bernd Anhäupl 05/17/96.
|
* Bernd Anhäupl 05/17/96.
|
*
|
*
|
* This module exports the following rs232 io functions:
|
* This module exports the following rs232 io functions:
|
*
|
*
|
* int rs_init(void);
|
* int rs_init(void);
|
* int rs_open(struct tty_struct * tty, struct file * filp)
|
* int rs_open(struct tty_struct * tty, struct file * filp)
|
*
|
*
|
* Slight modifications for ARM Copyright (C) 1995, 1996 Russell King
|
* Slight modifications for ARM Copyright (C) 1995, 1996 Russell King
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/signal.h>
|
#include <linux/signal.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/timer.h>
|
#include <linux/timer.h>
|
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
#include <linux/tty.h>
|
#include <linux/tty.h>
|
#include <linux/tty_flip.h>
|
#include <linux/tty_flip.h>
|
#include <linux/serial.h>
|
#include <linux/serial.h>
|
#include <linux/serial_reg.h>
|
#include <linux/serial_reg.h>
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/major.h>
|
#include <linux/major.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/ptrace.h>
|
#include <linux/ptrace.h>
|
#include <linux/ioport.h>
|
#include <linux/ioport.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
|
|
#include <asm/system.h>
|
#include <asm/system.h>
|
#include <asm/io.h>
|
#include <asm/io.h>
|
#include <asm/irq.h>
|
#include <asm/irq.h>
|
#include <asm/segment.h>
|
#include <asm/segment.h>
|
#include <asm/bitops.h>
|
#include <asm/bitops.h>
|
#include <asm/serial.h>
|
#include <asm/serial.h>
|
|
|
static char *serial_name = "Serial driver";
|
static char *serial_name = "Serial driver";
|
static char *serial_version = "4.13";
|
static char *serial_version = "4.13";
|
|
|
DECLARE_TASK_QUEUE(tq_serial);
|
DECLARE_TASK_QUEUE(tq_serial);
|
|
|
struct tty_driver serial_driver, callout_driver;
|
struct tty_driver serial_driver, callout_driver;
|
static int serial_refcount;
|
static int serial_refcount;
|
|
|
/* serial subtype definitions */
|
/* serial subtype definitions */
|
#define SERIAL_TYPE_NORMAL 1
|
#define SERIAL_TYPE_NORMAL 1
|
#define SERIAL_TYPE_CALLOUT 2
|
#define SERIAL_TYPE_CALLOUT 2
|
|
|
/* number of characters left in xmit buffer before we ask for more */
|
/* number of characters left in xmit buffer before we ask for more */
|
#define WAKEUP_CHARS 256
|
#define WAKEUP_CHARS 256
|
|
|
/*
|
/*
|
* Serial driver configuration section. Here are the various options:
|
* Serial driver configuration section. Here are the various options:
|
*
|
*
|
* CONFIG_HUB6
|
* CONFIG_HUB6
|
* Enables support for the venerable Bell Technologies
|
* Enables support for the venerable Bell Technologies
|
* HUB6 card.
|
* HUB6 card.
|
*
|
*
|
* SERIAL_PARANOIA_CHECK
|
* SERIAL_PARANOIA_CHECK
|
* Check the magic number for the async_structure where
|
* Check the magic number for the async_structure where
|
* ever possible.
|
* ever possible.
|
*/
|
*/
|
|
|
#define SERIAL_PARANOIA_CHECK
|
#define SERIAL_PARANOIA_CHECK
|
#define CONFIG_SERIAL_NOPAUSE_IO
|
#define CONFIG_SERIAL_NOPAUSE_IO
|
#define SERIAL_DO_RESTART
|
#define SERIAL_DO_RESTART
|
|
|
#undef SERIAL_DEBUG_INTR
|
#undef SERIAL_DEBUG_INTR
|
#undef SERIAL_DEBUG_OPEN
|
#undef SERIAL_DEBUG_OPEN
|
#undef SERIAL_DEBUG_FLOW
|
#undef SERIAL_DEBUG_FLOW
|
|
|
#define RS_STROBE_TIME (10*HZ)
|
#define RS_STROBE_TIME (10*HZ)
|
#define RS_ISR_PASS_LIMIT 256
|
#define RS_ISR_PASS_LIMIT 256
|
|
|
#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
|
#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
|
|
|
#define _INLINE_ inline
|
#define _INLINE_ inline
|
|
|
#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
|
#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
|
#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
|
#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
|
kdevname(tty->device), (info->flags), serial_refcount,info->count,tty->count,s)
|
kdevname(tty->device), (info->flags), serial_refcount,info->count,tty->count,s)
|
#else
|
#else
|
#define DBG_CNT(s)
|
#define DBG_CNT(s)
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* IRQ_timeout - How long the timeout should be for each IRQ
|
* IRQ_timeout - How long the timeout should be for each IRQ
|
* should be after the IRQ has been active.
|
* should be after the IRQ has been active.
|
*/
|
*/
|
|
|
static struct async_struct *IRQ_ports[NR_IRQS];
|
static struct async_struct *IRQ_ports[NR_IRQS];
|
static struct rs_multiport_struct rs_multiport[NR_IRQS];
|
static struct rs_multiport_struct rs_multiport[NR_IRQS];
|
static int IRQ_timeout[NR_IRQS];
|
static int IRQ_timeout[NR_IRQS];
|
static volatile int rs_irq_triggered;
|
static volatile int rs_irq_triggered;
|
static volatile int rs_triggered;
|
static volatile int rs_triggered;
|
static int rs_wild_int_mask;
|
static int rs_wild_int_mask;
|
|
|
static void autoconfig(struct async_struct * info);
|
static void autoconfig(struct async_struct * info);
|
static void change_speed(struct async_struct *info);
|
static void change_speed(struct async_struct *info);
|
|
|
struct async_struct rs_table[] = {
|
struct async_struct rs_table[] = {
|
RS_UARTS
|
RS_UARTS
|
};
|
};
|
|
|
#define NR_PORTS (sizeof(rs_table)/sizeof(struct async_struct))
|
#define NR_PORTS (sizeof(rs_table)/sizeof(struct async_struct))
|
|
|
static struct tty_struct *serial_table[NR_PORTS];
|
static struct tty_struct *serial_table[NR_PORTS];
|
static struct termios *serial_termios[NR_PORTS];
|
static struct termios *serial_termios[NR_PORTS];
|
static struct termios *serial_termios_locked[NR_PORTS];
|
static struct termios *serial_termios_locked[NR_PORTS];
|
|
|
#ifndef MIN
|
#ifndef MIN
|
#define MIN(a,b) ((a) < (b) ? (a) : (b))
|
#define MIN(a,b) ((a) < (b) ? (a) : (b))
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* tmp_buf is used as a temporary buffer by serial_write. We need to
|
* tmp_buf is used as a temporary buffer by serial_write. We need to
|
* lock it in case the memcpy_fromfs blocks while swapping in a page,
|
* lock it in case the memcpy_fromfs blocks while swapping in a page,
|
* and some other program tries to do a serial write at the same time.
|
* and some other program tries to do a serial write at the same time.
|
* Since the lock will only come under contention when the system is
|
* Since the lock will only come under contention when the system is
|
* swapping and available memory is low, it makes sense to share one
|
* swapping and available memory is low, it makes sense to share one
|
* buffer across all the serial ports, since it significantly saves
|
* buffer across all the serial ports, since it significantly saves
|
* memory if large numbers of serial ports are open.
|
* memory if large numbers of serial ports are open.
|
*/
|
*/
|
static unsigned char *tmp_buf;
|
static unsigned char *tmp_buf;
|
static struct semaphore tmp_buf_sem = MUTEX;
|
static struct semaphore tmp_buf_sem = MUTEX;
|
|
|
static inline int serial_paranoia_check(struct async_struct *info,
|
static inline int serial_paranoia_check(struct async_struct *info,
|
kdev_t device, const char *routine)
|
kdev_t device, const char *routine)
|
{
|
{
|
#ifdef SERIAL_PARANOIA_CHECK
|
#ifdef SERIAL_PARANOIA_CHECK
|
static const char *badmagic =
|
static const char *badmagic =
|
"Warning: bad magic number for serial struct (%s) in %s\n";
|
"Warning: bad magic number for serial struct (%s) in %s\n";
|
static const char *badinfo =
|
static const char *badinfo =
|
"Warning: null async_struct for (%s) in %s\n";
|
"Warning: null async_struct for (%s) in %s\n";
|
|
|
if (!info) {
|
if (!info) {
|
printk(badinfo, kdevname(device), routine);
|
printk(badinfo, kdevname(device), routine);
|
return 1;
|
return 1;
|
}
|
}
|
if (info->magic != SERIAL_MAGIC) {
|
if (info->magic != SERIAL_MAGIC) {
|
printk(badmagic, kdevname(device), routine);
|
printk(badmagic, kdevname(device), routine);
|
return 1;
|
return 1;
|
}
|
}
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This is used to figure out the divisor speeds and the timeouts
|
* This is used to figure out the divisor speeds and the timeouts
|
*/
|
*/
|
static int baud_table[] = {
|
static int baud_table[] = {
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
9600, 19200, 38400, 57600, 115200, 0 };
|
9600, 19200, 38400, 57600, 115200, 0 };
|
|
|
static inline unsigned int serial_in(struct async_struct *info, int offset)
|
static inline unsigned int serial_in(struct async_struct *info, int offset)
|
{
|
{
|
#ifdef CONFIG_HUB6
|
#ifdef CONFIG_HUB6
|
if (info->hub6) {
|
if (info->hub6) {
|
outb(info->hub6 - 1 + offset, info->port);
|
outb(info->hub6 - 1 + offset, info->port);
|
return inb(info->port+1);
|
return inb(info->port+1);
|
} else
|
} else
|
#endif
|
#endif
|
return inb(info->port + offset);
|
return inb(info->port + offset);
|
}
|
}
|
|
|
static inline unsigned int serial_inp(struct async_struct *info, int offset)
|
static inline unsigned int serial_inp(struct async_struct *info, int offset)
|
{
|
{
|
#ifdef CONFIG_HUB6
|
#ifdef CONFIG_HUB6
|
if (info->hub6) {
|
if (info->hub6) {
|
outb(info->hub6 - 1 + offset, info->port);
|
outb(info->hub6 - 1 + offset, info->port);
|
return inb_p(info->port+1);
|
return inb_p(info->port+1);
|
} else
|
} else
|
#endif
|
#endif
|
#ifdef CONFIG_SERIAL_NOPAUSE_IO
|
#ifdef CONFIG_SERIAL_NOPAUSE_IO
|
return inb(info->port + offset);
|
return inb(info->port + offset);
|
#else
|
#else
|
return inb_p(info->port + offset);
|
return inb_p(info->port + offset);
|
#endif
|
#endif
|
}
|
}
|
|
|
static inline void serial_out(struct async_struct *info, int offset, int value)
|
static inline void serial_out(struct async_struct *info, int offset, int value)
|
{
|
{
|
#ifdef CONFIG_HUB6
|
#ifdef CONFIG_HUB6
|
if (info->hub6) {
|
if (info->hub6) {
|
outb(info->hub6 - 1 + offset, info->port);
|
outb(info->hub6 - 1 + offset, info->port);
|
outb(value, info->port+1);
|
outb(value, info->port+1);
|
} else
|
} else
|
#endif
|
#endif
|
outb(value, info->port+offset);
|
outb(value, info->port+offset);
|
}
|
}
|
|
|
static inline void serial_outp(struct async_struct *info, int offset,
|
static inline void serial_outp(struct async_struct *info, int offset,
|
int value)
|
int value)
|
{
|
{
|
#ifdef CONFIG_HUB6
|
#ifdef CONFIG_HUB6
|
if (info->hub6) {
|
if (info->hub6) {
|
outb(info->hub6 - 1 + offset, info->port);
|
outb(info->hub6 - 1 + offset, info->port);
|
outb_p(value, info->port+1);
|
outb_p(value, info->port+1);
|
} else
|
} else
|
#endif
|
#endif
|
#ifdef CONFIG_SERIAL_NOPAUSE_IO
|
#ifdef CONFIG_SERIAL_NOPAUSE_IO
|
outb(value, info->port+offset);
|
outb(value, info->port+offset);
|
#else
|
#else
|
outb_p(value, info->port+offset);
|
outb_p(value, info->port+offset);
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_stop() and rs_start()
|
* rs_stop() and rs_start()
|
*
|
*
|
* This routines are called before setting or resetting tty->stopped.
|
* This routines are called before setting or resetting tty->stopped.
|
* They enable or disable transmitter interrupts, as necessary.
|
* They enable or disable transmitter interrupts, as necessary.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static void rs_stop(struct tty_struct *tty)
|
static void rs_stop(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_stop"))
|
if (serial_paranoia_check(info, tty->device, "rs_stop"))
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
if (info->IER & UART_IER_THRI) {
|
if (info->IER & UART_IER_THRI) {
|
info->IER &= ~UART_IER_THRI;
|
info->IER &= ~UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
static void rs_start(struct tty_struct *tty)
|
static void rs_start(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_start"))
|
if (serial_paranoia_check(info, tty->device, "rs_start"))
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
|
if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
|
info->IER |= UART_IER_THRI;
|
info->IER |= UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/*
|
/*
|
* ----------------------------------------------------------------------
|
* ----------------------------------------------------------------------
|
*
|
*
|
* Here starts the interrupt handling routines. All of the following
|
* Here starts the interrupt handling routines. All of the following
|
* subroutines are declared as inline and are folded into
|
* subroutines are declared as inline and are folded into
|
* rs_interrupt(). They were separated out for readability's sake.
|
* rs_interrupt(). They were separated out for readability's sake.
|
*
|
*
|
* Note: rs_interrupt() is a "fast" interrupt, which means that it
|
* Note: rs_interrupt() is a "fast" interrupt, which means that it
|
* runs with interrupts turned off. People who may want to modify
|
* runs with interrupts turned off. People who may want to modify
|
* rs_interrupt() should try to keep the interrupt handler as fast as
|
* rs_interrupt() should try to keep the interrupt handler as fast as
|
* possible. After you are done making modifications, it is not a bad
|
* possible. After you are done making modifications, it is not a bad
|
* idea to do:
|
* idea to do:
|
*
|
*
|
* gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
|
* gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
|
*
|
*
|
* and look at the resulting assemble code in serial.s.
|
* and look at the resulting assemble code in serial.s.
|
*
|
*
|
* - Ted Ts'o (tytso@mit.edu), 7-Mar-93
|
* - Ted Ts'o (tytso@mit.edu), 7-Mar-93
|
* -----------------------------------------------------------------------
|
* -----------------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* This is the serial driver's interrupt routine while we are probing
|
* This is the serial driver's interrupt routine while we are probing
|
* for submarines.
|
* for submarines.
|
*/
|
*/
|
static void rs_probe(int irq, void *dev_id, struct pt_regs * regs)
|
static void rs_probe(int irq, void *dev_id, struct pt_regs * regs)
|
{
|
{
|
rs_irq_triggered = irq;
|
rs_irq_triggered = irq;
|
rs_triggered |= 1 << irq;
|
rs_triggered |= 1 << irq;
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is used by the interrupt handler to schedule
|
* This routine is used by the interrupt handler to schedule
|
* processing in the software interrupt portion of the driver.
|
* processing in the software interrupt portion of the driver.
|
*/
|
*/
|
static _INLINE_ void rs_sched_event(struct async_struct *info,
|
static _INLINE_ void rs_sched_event(struct async_struct *info,
|
int event)
|
int event)
|
{
|
{
|
info->event |= 1 << event;
|
info->event |= 1 << event;
|
queue_task_irq_off(&info->tqueue, &tq_serial);
|
queue_task_irq_off(&info->tqueue, &tq_serial);
|
mark_bh(SERIAL_BH);
|
mark_bh(SERIAL_BH);
|
}
|
}
|
|
|
static _INLINE_ void receive_chars(struct async_struct *info,
|
static _INLINE_ void receive_chars(struct async_struct *info,
|
int *status)
|
int *status)
|
{
|
{
|
struct tty_struct *tty = info->tty;
|
struct tty_struct *tty = info->tty;
|
unsigned char ch;
|
unsigned char ch;
|
int ignored = 0;
|
int ignored = 0;
|
|
|
do {
|
do {
|
ch = serial_inp(info, UART_RX);
|
ch = serial_inp(info, UART_RX);
|
if (*status & info->ignore_status_mask) {
|
if (*status & info->ignore_status_mask) {
|
if (++ignored > 100)
|
if (++ignored > 100)
|
break;
|
break;
|
goto ignore_char;
|
goto ignore_char;
|
}
|
}
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
break;
|
break;
|
tty->flip.count++;
|
tty->flip.count++;
|
if (*status & (UART_LSR_BI)) {
|
if (*status & (UART_LSR_BI)) {
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("handling break....");
|
printk("handling break....");
|
#endif
|
#endif
|
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
|
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
|
if (info->flags & ASYNC_SAK)
|
if (info->flags & ASYNC_SAK)
|
do_SAK(tty);
|
do_SAK(tty);
|
} else if (*status & UART_LSR_PE)
|
} else if (*status & UART_LSR_PE)
|
*tty->flip.flag_buf_ptr++ = TTY_PARITY;
|
*tty->flip.flag_buf_ptr++ = TTY_PARITY;
|
else if (*status & UART_LSR_FE)
|
else if (*status & UART_LSR_FE)
|
*tty->flip.flag_buf_ptr++ = TTY_FRAME;
|
*tty->flip.flag_buf_ptr++ = TTY_FRAME;
|
else if (*status & UART_LSR_OE)
|
else if (*status & UART_LSR_OE)
|
*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
|
*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
|
else
|
else
|
*tty->flip.flag_buf_ptr++ = 0;
|
*tty->flip.flag_buf_ptr++ = 0;
|
*tty->flip.char_buf_ptr++ = ch;
|
*tty->flip.char_buf_ptr++ = ch;
|
ignore_char:
|
ignore_char:
|
*status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
*status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
} while (*status & UART_LSR_DR);
|
} while (*status & UART_LSR_DR);
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("DR...");
|
printk("DR...");
|
#endif
|
#endif
|
}
|
}
|
|
|
static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
|
static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
|
{
|
{
|
int count;
|
int count;
|
|
|
if (info->x_char) {
|
if (info->x_char) {
|
serial_outp(info, UART_TX, info->x_char);
|
serial_outp(info, UART_TX, info->x_char);
|
info->x_char = 0;
|
info->x_char = 0;
|
if (intr_done)
|
if (intr_done)
|
*intr_done = 0;
|
*intr_done = 0;
|
return;
|
return;
|
}
|
}
|
if ((info->xmit_cnt <= 0) || info->tty->stopped ||
|
if ((info->xmit_cnt <= 0) || info->tty->stopped ||
|
info->tty->hw_stopped) {
|
info->tty->hw_stopped) {
|
info->IER &= ~UART_IER_THRI;
|
info->IER &= ~UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
return;
|
return;
|
}
|
}
|
|
|
count = info->xmit_fifo_size;
|
count = info->xmit_fifo_size;
|
do {
|
do {
|
serial_out(info, UART_TX, info->xmit_buf[info->xmit_tail++]);
|
serial_out(info, UART_TX, info->xmit_buf[info->xmit_tail++]);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
if (--info->xmit_cnt <= 0)
|
if (--info->xmit_cnt <= 0)
|
break;
|
break;
|
} while (--count > 0);
|
} while (--count > 0);
|
|
|
if (info->xmit_cnt < WAKEUP_CHARS)
|
if (info->xmit_cnt < WAKEUP_CHARS)
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
|
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("THRE...");
|
printk("THRE...");
|
#endif
|
#endif
|
if (intr_done)
|
if (intr_done)
|
*intr_done = 0;
|
*intr_done = 0;
|
|
|
if (info->xmit_cnt <= 0) {
|
if (info->xmit_cnt <= 0) {
|
info->IER &= ~UART_IER_THRI;
|
info->IER &= ~UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
}
|
}
|
}
|
}
|
|
|
static _INLINE_ void check_modem_status(struct async_struct *info)
|
static _INLINE_ void check_modem_status(struct async_struct *info)
|
{
|
{
|
int status;
|
int status;
|
|
|
status = serial_in(info, UART_MSR);
|
status = serial_in(info, UART_MSR);
|
|
|
if (status & UART_MSR_ANY_DELTA) {
|
if (status & UART_MSR_ANY_DELTA) {
|
/* update input line counters */
|
/* update input line counters */
|
if (status & UART_MSR_TERI)
|
if (status & UART_MSR_TERI)
|
info->icount.rng++;
|
info->icount.rng++;
|
if (status & UART_MSR_DDSR)
|
if (status & UART_MSR_DDSR)
|
info->icount.dsr++;
|
info->icount.dsr++;
|
if (status & UART_MSR_DDCD)
|
if (status & UART_MSR_DDCD)
|
info->icount.dcd++;
|
info->icount.dcd++;
|
if (status & UART_MSR_DCTS)
|
if (status & UART_MSR_DCTS)
|
info->icount.cts++;
|
info->icount.cts++;
|
wake_up_interruptible(&info->delta_msr_wait);
|
wake_up_interruptible(&info->delta_msr_wait);
|
}
|
}
|
|
|
if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
|
if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
|
#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
|
#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
|
printk("ttys%d CD now %s...", info->line,
|
printk("ttys%d CD now %s...", info->line,
|
(status & UART_MSR_DCD) ? "on" : "off");
|
(status & UART_MSR_DCD) ? "on" : "off");
|
#endif
|
#endif
|
if (status & UART_MSR_DCD)
|
if (status & UART_MSR_DCD)
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
(info->flags & ASYNC_CALLOUT_NOHUP))) {
|
(info->flags & ASYNC_CALLOUT_NOHUP))) {
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("scheduling hangup...");
|
printk("scheduling hangup...");
|
#endif
|
#endif
|
queue_task_irq_off(&info->tqueue_hangup,
|
queue_task_irq_off(&info->tqueue_hangup,
|
&tq_scheduler);
|
&tq_scheduler);
|
}
|
}
|
}
|
}
|
if (info->flags & ASYNC_CTS_FLOW) {
|
if (info->flags & ASYNC_CTS_FLOW) {
|
if (info->tty->hw_stopped) {
|
if (info->tty->hw_stopped) {
|
if (status & UART_MSR_CTS) {
|
if (status & UART_MSR_CTS) {
|
#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
|
#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
|
printk("CTS tx start...");
|
printk("CTS tx start...");
|
#endif
|
#endif
|
info->tty->hw_stopped = 0;
|
info->tty->hw_stopped = 0;
|
info->IER |= UART_IER_THRI;
|
info->IER |= UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
return;
|
return;
|
}
|
}
|
} else {
|
} else {
|
if (!(status & UART_MSR_CTS)) {
|
if (!(status & UART_MSR_CTS)) {
|
#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
|
#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
|
printk("CTS tx stop...");
|
printk("CTS tx stop...");
|
#endif
|
#endif
|
info->tty->hw_stopped = 1;
|
info->tty->hw_stopped = 1;
|
info->IER &= ~UART_IER_THRI;
|
info->IER &= ~UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* This is the serial driver's generic interrupt routine
|
* This is the serial driver's generic interrupt routine
|
*/
|
*/
|
static void rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
|
static void rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
|
{
|
{
|
int status;
|
int status;
|
struct async_struct * info;
|
struct async_struct * info;
|
int pass_counter = 0;
|
int pass_counter = 0;
|
struct async_struct *end_mark = 0;
|
struct async_struct *end_mark = 0;
|
int first_multi = 0;
|
int first_multi = 0;
|
struct rs_multiport_struct *multi;
|
struct rs_multiport_struct *multi;
|
|
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("rs_interrupt(%d)...", irq);
|
printk("rs_interrupt(%d)...", irq);
|
#endif
|
#endif
|
|
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (!info)
|
if (!info)
|
return;
|
return;
|
|
|
multi = &rs_multiport[irq];
|
multi = &rs_multiport[irq];
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
first_multi = inb(multi->port_monitor);
|
first_multi = inb(multi->port_monitor);
|
|
|
do {
|
do {
|
if (!info->tty ||
|
if (!info->tty ||
|
(serial_in(info, UART_IIR) & UART_IIR_NO_INT)) {
|
(serial_in(info, UART_IIR) & UART_IIR_NO_INT)) {
|
if (!end_mark)
|
if (!end_mark)
|
end_mark = info;
|
end_mark = info;
|
goto next;
|
goto next;
|
}
|
}
|
end_mark = 0;
|
end_mark = 0;
|
|
|
info->last_active = jiffies;
|
info->last_active = jiffies;
|
|
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("status = %x...", status);
|
printk("status = %x...", status);
|
#endif
|
#endif
|
if (status & UART_LSR_DR)
|
if (status & UART_LSR_DR)
|
receive_chars(info, &status);
|
receive_chars(info, &status);
|
check_modem_status(info);
|
check_modem_status(info);
|
if (status & UART_LSR_THRE)
|
if (status & UART_LSR_THRE)
|
transmit_chars(info, 0);
|
transmit_chars(info, 0);
|
|
|
next:
|
next:
|
info = info->next_port;
|
info = info->next_port;
|
if (!info) {
|
if (!info) {
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
#if 0
|
#if 0
|
printk("rs loop break\n");
|
printk("rs loop break\n");
|
#endif
|
#endif
|
break; /* Prevent infinite loops */
|
break; /* Prevent infinite loops */
|
}
|
}
|
continue;
|
continue;
|
}
|
}
|
} while (end_mark != info);
|
} while (end_mark != info);
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
printk("rs port monitor (normal) irq %d: 0x%x, 0x%x\n",
|
printk("rs port monitor (normal) irq %d: 0x%x, 0x%x\n",
|
info->irq, first_multi, inb(multi->port_monitor));
|
info->irq, first_multi, inb(multi->port_monitor));
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("end.\n");
|
printk("end.\n");
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* This is the serial driver's interrupt routine for a single port
|
* This is the serial driver's interrupt routine for a single port
|
*/
|
*/
|
static void rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
|
static void rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
|
{
|
{
|
int status;
|
int status;
|
int pass_counter = 0;
|
int pass_counter = 0;
|
int first_multi = 0;
|
int first_multi = 0;
|
struct async_struct * info;
|
struct async_struct * info;
|
struct rs_multiport_struct *multi;
|
struct rs_multiport_struct *multi;
|
|
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("rs_interrupt_single(%d)...", irq);
|
printk("rs_interrupt_single(%d)...", irq);
|
#endif
|
#endif
|
|
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (!info || !info->tty)
|
if (!info || !info->tty)
|
return;
|
return;
|
|
|
multi = &rs_multiport[irq];
|
multi = &rs_multiport[irq];
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
first_multi = inb(multi->port_monitor);
|
first_multi = inb(multi->port_monitor);
|
|
|
do {
|
do {
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("status = %x...", status);
|
printk("status = %x...", status);
|
#endif
|
#endif
|
if (status & UART_LSR_DR)
|
if (status & UART_LSR_DR)
|
receive_chars(info, &status);
|
receive_chars(info, &status);
|
check_modem_status(info);
|
check_modem_status(info);
|
if (status & UART_LSR_THRE)
|
if (status & UART_LSR_THRE)
|
transmit_chars(info, 0);
|
transmit_chars(info, 0);
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
#if 0
|
#if 0
|
printk("rs_single loop break.\n");
|
printk("rs_single loop break.\n");
|
#endif
|
#endif
|
break;
|
break;
|
}
|
}
|
} while (!(serial_in(info, UART_IIR) & UART_IIR_NO_INT));
|
} while (!(serial_in(info, UART_IIR) & UART_IIR_NO_INT));
|
info->last_active = jiffies;
|
info->last_active = jiffies;
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
printk("rs port monitor (single) irq %d: 0x%x, 0x%x\n",
|
printk("rs port monitor (single) irq %d: 0x%x, 0x%x\n",
|
info->irq, first_multi, inb(multi->port_monitor));
|
info->irq, first_multi, inb(multi->port_monitor));
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("end.\n");
|
printk("end.\n");
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* This is the serial driver's for multiport boards
|
* This is the serial driver's for multiport boards
|
*/
|
*/
|
static void rs_interrupt_multi(int irq, void *dev_id, struct pt_regs * regs)
|
static void rs_interrupt_multi(int irq, void *dev_id, struct pt_regs * regs)
|
{
|
{
|
int status;
|
int status;
|
struct async_struct * info;
|
struct async_struct * info;
|
int pass_counter = 0;
|
int pass_counter = 0;
|
int first_multi= 0;
|
int first_multi= 0;
|
struct rs_multiport_struct *multi;
|
struct rs_multiport_struct *multi;
|
|
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("rs_interrupt_multi(%d)...", irq);
|
printk("rs_interrupt_multi(%d)...", irq);
|
#endif
|
#endif
|
|
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (!info)
|
if (!info)
|
return;
|
return;
|
multi = &rs_multiport[irq];
|
multi = &rs_multiport[irq];
|
if (!multi->port1) {
|
if (!multi->port1) {
|
/* Should never happen */
|
/* Should never happen */
|
printk("rs_interrupt_multi: NULL port1!\n");
|
printk("rs_interrupt_multi: NULL port1!\n");
|
return;
|
return;
|
}
|
}
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
first_multi = inb(multi->port_monitor);
|
first_multi = inb(multi->port_monitor);
|
|
|
while (1) {
|
while (1) {
|
if (!info->tty ||
|
if (!info->tty ||
|
(serial_in(info, UART_IIR) & UART_IIR_NO_INT))
|
(serial_in(info, UART_IIR) & UART_IIR_NO_INT))
|
goto next;
|
goto next;
|
|
|
info->last_active = jiffies;
|
info->last_active = jiffies;
|
|
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
status = serial_inp(info, UART_LSR) & info->read_status_mask;
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("status = %x...", status);
|
printk("status = %x...", status);
|
#endif
|
#endif
|
if (status & UART_LSR_DR)
|
if (status & UART_LSR_DR)
|
receive_chars(info, &status);
|
receive_chars(info, &status);
|
check_modem_status(info);
|
check_modem_status(info);
|
if (status & UART_LSR_THRE)
|
if (status & UART_LSR_THRE)
|
transmit_chars(info, 0);
|
transmit_chars(info, 0);
|
|
|
next:
|
next:
|
info = info->next_port;
|
info = info->next_port;
|
if (info)
|
if (info)
|
continue;
|
continue;
|
|
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
|
#if 1
|
#if 1
|
printk("rs_multi loop break\n");
|
printk("rs_multi loop break\n");
|
#endif
|
#endif
|
break; /* Prevent infinite loops */
|
break; /* Prevent infinite loops */
|
}
|
}
|
if (multi->port_monitor)
|
if (multi->port_monitor)
|
printk("rs port monitor irq %d: 0x%x, 0x%x\n",
|
printk("rs port monitor irq %d: 0x%x, 0x%x\n",
|
info->irq, first_multi,
|
info->irq, first_multi,
|
inb(multi->port_monitor));
|
inb(multi->port_monitor));
|
if ((inb(multi->port1) & multi->mask1) != multi->match1)
|
if ((inb(multi->port1) & multi->mask1) != multi->match1)
|
continue;
|
continue;
|
if (!multi->port2)
|
if (!multi->port2)
|
break;
|
break;
|
if ((inb(multi->port2) & multi->mask2) != multi->match2)
|
if ((inb(multi->port2) & multi->mask2) != multi->match2)
|
continue;
|
continue;
|
if (!multi->port3)
|
if (!multi->port3)
|
break;
|
break;
|
if ((inb(multi->port3) & multi->mask3) != multi->match3)
|
if ((inb(multi->port3) & multi->mask3) != multi->match3)
|
continue;
|
continue;
|
if (!multi->port4)
|
if (!multi->port4)
|
break;
|
break;
|
if ((inb(multi->port4) & multi->mask4) == multi->match4)
|
if ((inb(multi->port4) & multi->mask4) == multi->match4)
|
continue;
|
continue;
|
break;
|
break;
|
}
|
}
|
#ifdef SERIAL_DEBUG_INTR
|
#ifdef SERIAL_DEBUG_INTR
|
printk("end.\n");
|
printk("end.\n");
|
#endif
|
#endif
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* -------------------------------------------------------------------
|
* -------------------------------------------------------------------
|
* Here ends the serial interrupt routines.
|
* Here ends the serial interrupt routines.
|
* -------------------------------------------------------------------
|
* -------------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* This routine is used to handle the "bottom half" processing for the
|
* This routine is used to handle the "bottom half" processing for the
|
* serial driver, known also the "software interrupt" processing.
|
* serial driver, known also the "software interrupt" processing.
|
* This processing is done at the kernel interrupt level, after the
|
* This processing is done at the kernel interrupt level, after the
|
* rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
|
* rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
|
* is where time-consuming activities which can not be done in the
|
* is where time-consuming activities which can not be done in the
|
* interrupt driver proper are done; the interrupt driver schedules
|
* interrupt driver proper are done; the interrupt driver schedules
|
* them using rs_sched_event(), and they get done here.
|
* them using rs_sched_event(), and they get done here.
|
*/
|
*/
|
static void do_serial_bh(void)
|
static void do_serial_bh(void)
|
{
|
{
|
run_task_queue(&tq_serial);
|
run_task_queue(&tq_serial);
|
}
|
}
|
|
|
static void do_softint(void *private_)
|
static void do_softint(void *private_)
|
{
|
{
|
struct async_struct *info = (struct async_struct *) private_;
|
struct async_struct *info = (struct async_struct *) private_;
|
struct tty_struct *tty;
|
struct tty_struct *tty;
|
|
|
tty = info->tty;
|
tty = info->tty;
|
if (!tty)
|
if (!tty)
|
return;
|
return;
|
|
|
if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
|
if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
tty->ldisc.write_wakeup)
|
tty->ldisc.write_wakeup)
|
(tty->ldisc.write_wakeup)(tty);
|
(tty->ldisc.write_wakeup)(tty);
|
wake_up_interruptible(&tty->write_wait);
|
wake_up_interruptible(&tty->write_wait);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called from the scheduler tqueue when the interrupt
|
* This routine is called from the scheduler tqueue when the interrupt
|
* routine has signalled that a hangup has occurred. The path of
|
* routine has signalled that a hangup has occurred. The path of
|
* hangup processing is:
|
* hangup processing is:
|
*
|
*
|
* serial interrupt routine -> (scheduler tqueue) ->
|
* serial interrupt routine -> (scheduler tqueue) ->
|
* do_serial_hangup() -> tty->hangup() -> rs_hangup()
|
* do_serial_hangup() -> tty->hangup() -> rs_hangup()
|
*
|
*
|
*/
|
*/
|
static void do_serial_hangup(void *private_)
|
static void do_serial_hangup(void *private_)
|
{
|
{
|
struct async_struct *info = (struct async_struct *) private_;
|
struct async_struct *info = (struct async_struct *) private_;
|
struct tty_struct *tty;
|
struct tty_struct *tty;
|
|
|
tty = info->tty;
|
tty = info->tty;
|
if (!tty)
|
if (!tty)
|
return;
|
return;
|
|
|
tty_hangup(tty);
|
tty_hangup(tty);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* This subroutine is called when the RS_TIMER goes off. It is used
|
* This subroutine is called when the RS_TIMER goes off. It is used
|
* by the serial driver to handle ports that do not have an interrupt
|
* by the serial driver to handle ports that do not have an interrupt
|
* (irq=0). This doesn't work very well for 16450's, but gives barely
|
* (irq=0). This doesn't work very well for 16450's, but gives barely
|
* passable results for a 16550A. (Although at the expense of much
|
* passable results for a 16550A. (Although at the expense of much
|
* CPU overhead).
|
* CPU overhead).
|
*/
|
*/
|
static void rs_timer(void)
|
static void rs_timer(void)
|
{
|
{
|
static unsigned long last_strobe = 0;
|
static unsigned long last_strobe = 0;
|
struct async_struct *info;
|
struct async_struct *info;
|
unsigned int i;
|
unsigned int i;
|
|
|
if ((jiffies - last_strobe) >= RS_STROBE_TIME) {
|
if ((jiffies - last_strobe) >= RS_STROBE_TIME) {
|
for (i=0; i < 32; i++) {
|
for (i=0; i < 32; i++) {
|
info = IRQ_ports[i];
|
info = IRQ_ports[i];
|
if (!info)
|
if (!info)
|
continue;
|
continue;
|
cli();
|
cli();
|
if (info->next_port) {
|
if (info->next_port) {
|
do {
|
do {
|
serial_out(info, UART_IER, 0);
|
serial_out(info, UART_IER, 0);
|
info->IER |= UART_IER_THRI;
|
info->IER |= UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
info = info->next_port;
|
info = info->next_port;
|
} while (info);
|
} while (info);
|
if (rs_multiport[i].port1)
|
if (rs_multiport[i].port1)
|
rs_interrupt_multi(i, NULL, NULL);
|
rs_interrupt_multi(i, NULL, NULL);
|
else
|
else
|
rs_interrupt(i, NULL, NULL);
|
rs_interrupt(i, NULL, NULL);
|
} else
|
} else
|
rs_interrupt_single(i, NULL, NULL);
|
rs_interrupt_single(i, NULL, NULL);
|
sti();
|
sti();
|
}
|
}
|
}
|
}
|
last_strobe = jiffies;
|
last_strobe = jiffies;
|
timer_table[RS_TIMER].expires = jiffies + RS_STROBE_TIME;
|
timer_table[RS_TIMER].expires = jiffies + RS_STROBE_TIME;
|
timer_active |= 1 << RS_TIMER;
|
timer_active |= 1 << RS_TIMER;
|
|
|
if (IRQ_ports[0]) {
|
if (IRQ_ports[0]) {
|
cli();
|
cli();
|
rs_interrupt(0, NULL, NULL);
|
rs_interrupt(0, NULL, NULL);
|
sti();
|
sti();
|
|
|
timer_table[RS_TIMER].expires = jiffies + IRQ_timeout[0] - 2;
|
timer_table[RS_TIMER].expires = jiffies + IRQ_timeout[0] - 2;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* ---------------------------------------------------------------
|
* ---------------------------------------------------------------
|
* Low level utility subroutines for the serial driver: routines to
|
* Low level utility subroutines for the serial driver: routines to
|
* figure out the appropriate timeout for an interrupt chain, routines
|
* figure out the appropriate timeout for an interrupt chain, routines
|
* to initialize and startup a serial port, and routines to shutdown a
|
* to initialize and startup a serial port, and routines to shutdown a
|
* serial port. Useful stuff like that.
|
* serial port. Useful stuff like that.
|
* ---------------------------------------------------------------
|
* ---------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* Grab all interrupts in preparation for doing an automatic irq
|
* Grab all interrupts in preparation for doing an automatic irq
|
* detection. dontgrab is a mask of irq's _not_ to grab. Returns a
|
* detection. dontgrab is a mask of irq's _not_ to grab. Returns a
|
* mask of irq's which were grabbed and should therefore be freed
|
* mask of irq's which were grabbed and should therefore be freed
|
* using free_all_interrupts().
|
* using free_all_interrupts().
|
*/
|
*/
|
static int grab_all_interrupts(int dontgrab)
|
static int grab_all_interrupts(int dontgrab)
|
{
|
{
|
int irq_lines = 0;
|
int irq_lines = 0;
|
int i, mask;
|
int i, mask;
|
|
|
for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
|
for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
|
if (!(mask & dontgrab) && !request_irq(i, rs_probe, SA_INTERRUPT, "serial probe", NULL)) {
|
if (!(mask & dontgrab) && !request_irq(i, rs_probe, SA_INTERRUPT, "serial probe", NULL)) {
|
irq_lines |= mask;
|
irq_lines |= mask;
|
}
|
}
|
}
|
}
|
return irq_lines;
|
return irq_lines;
|
}
|
}
|
|
|
/*
|
/*
|
* Release all interrupts grabbed by grab_all_interrupts
|
* Release all interrupts grabbed by grab_all_interrupts
|
*/
|
*/
|
static void free_all_interrupts(int irq_lines)
|
static void free_all_interrupts(int irq_lines)
|
{
|
{
|
int i;
|
int i;
|
|
|
for (i = 0; i < 16; i++) {
|
for (i = 0; i < 16; i++) {
|
if (irq_lines & (1 << i))
|
if (irq_lines & (1 << i))
|
free_irq(i, NULL);
|
free_irq(i, NULL);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* This routine figures out the correct timeout for a particular IRQ.
|
* This routine figures out the correct timeout for a particular IRQ.
|
* It uses the smallest timeout of all of the serial ports in a
|
* It uses the smallest timeout of all of the serial ports in a
|
* particular interrupt chain. Now only used for IRQ 0....
|
* particular interrupt chain. Now only used for IRQ 0....
|
*/
|
*/
|
static void figure_IRQ_timeout(int irq)
|
static void figure_IRQ_timeout(int irq)
|
{
|
{
|
struct async_struct *info;
|
struct async_struct *info;
|
int timeout = 60*HZ; /* 60 seconds === a long time :-) */
|
int timeout = 60*HZ; /* 60 seconds === a long time :-) */
|
|
|
info = IRQ_ports[irq];
|
info = IRQ_ports[irq];
|
if (!info) {
|
if (!info) {
|
IRQ_timeout[irq] = 60*HZ;
|
IRQ_timeout[irq] = 60*HZ;
|
return;
|
return;
|
}
|
}
|
while (info) {
|
while (info) {
|
if (info->timeout < timeout)
|
if (info->timeout < timeout)
|
timeout = info->timeout;
|
timeout = info->timeout;
|
info = info->next_port;
|
info = info->next_port;
|
}
|
}
|
if (!irq)
|
if (!irq)
|
timeout = timeout / 2;
|
timeout = timeout / 2;
|
IRQ_timeout[irq] = timeout ? timeout : 1;
|
IRQ_timeout[irq] = timeout ? timeout : 1;
|
}
|
}
|
|
|
static int startup(struct async_struct * info)
|
static int startup(struct async_struct * info)
|
{
|
{
|
unsigned short ICP;
|
unsigned short ICP;
|
unsigned long flags;
|
unsigned long flags;
|
int retval;
|
int retval;
|
void (*handler)(int, void *, struct pt_regs *);
|
void (*handler)(int, void *, struct pt_regs *);
|
unsigned long page;
|
unsigned long page;
|
|
|
page = get_free_page(GFP_KERNEL);
|
page = get_free_page(GFP_KERNEL);
|
if (!page)
|
if (!page)
|
return -ENOMEM;
|
return -ENOMEM;
|
|
|
|
|
save_flags_cli(flags);
|
save_flags_cli(flags);
|
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
if (info->flags & ASYNC_INITIALIZED) {
|
free_page(page);
|
free_page(page);
|
restore_flags(flags);
|
restore_flags(flags);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (!info->port || !info->type) {
|
if (!info->port || !info->type) {
|
if (info->tty)
|
if (info->tty)
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
free_page(page);
|
free_page(page);
|
restore_flags(flags);
|
restore_flags(flags);
|
return 0;
|
return 0;
|
}
|
}
|
if (info->xmit_buf)
|
if (info->xmit_buf)
|
free_page(page);
|
free_page(page);
|
else
|
else
|
info->xmit_buf = (unsigned char *) page;
|
info->xmit_buf = (unsigned char *) page;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("starting up ttys%d (irq %d)...", info->line, info->irq);
|
printk("starting up ttys%d (irq %d)...", info->line, info->irq);
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Clear the FIFO buffers and disable them
|
* Clear the FIFO buffers and disable them
|
* (they will be reenabled in change_speed())
|
* (they will be reenabled in change_speed())
|
*/
|
*/
|
if (info->type == PORT_16650) {
|
if (info->type == PORT_16650) {
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
UART_FCR_CLEAR_XMIT));
|
UART_FCR_CLEAR_XMIT));
|
info->xmit_fifo_size = 1; /* disabled for now */
|
info->xmit_fifo_size = 1; /* disabled for now */
|
} else if (info->type == PORT_16550A) {
|
} else if (info->type == PORT_16550A) {
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
UART_FCR_CLEAR_XMIT));
|
UART_FCR_CLEAR_XMIT));
|
info->xmit_fifo_size = 16;
|
info->xmit_fifo_size = 16;
|
} else
|
} else
|
info->xmit_fifo_size = 1;
|
info->xmit_fifo_size = 1;
|
|
|
/*
|
/*
|
* At this point there's no way the LSR could still be 0xFF;
|
* 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
|
* if it is, then bail out, because there's likely no UART
|
* here.
|
* here.
|
*/
|
*/
|
if (serial_inp(info, UART_LSR) == 0xff) {
|
if (serial_inp(info, UART_LSR) == 0xff) {
|
restore_flags(flags);
|
restore_flags(flags);
|
if (suser()) {
|
if (suser()) {
|
if (info->tty)
|
if (info->tty)
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
return 0;
|
return 0;
|
} else
|
} else
|
return -ENODEV;
|
return -ENODEV;
|
}
|
}
|
|
|
/*
|
/*
|
* Allocate the IRQ if necessary
|
* Allocate the IRQ if necessary
|
*/
|
*/
|
if (info->irq && (!IRQ_ports[info->irq] ||
|
if (info->irq && (!IRQ_ports[info->irq] ||
|
!IRQ_ports[info->irq]->next_port)) {
|
!IRQ_ports[info->irq]->next_port)) {
|
if (IRQ_ports[info->irq]) {
|
if (IRQ_ports[info->irq]) {
|
free_irq(info->irq, NULL);
|
free_irq(info->irq, NULL);
|
if (rs_multiport[info->irq].port1)
|
if (rs_multiport[info->irq].port1)
|
handler = rs_interrupt_multi;
|
handler = rs_interrupt_multi;
|
else
|
else
|
handler = rs_interrupt;
|
handler = rs_interrupt;
|
} else
|
} else
|
handler = rs_interrupt_single;
|
handler = rs_interrupt_single;
|
|
|
retval = request_irq(info->irq, handler, IRQ_T(info),
|
retval = request_irq(info->irq, handler, IRQ_T(info),
|
"serial", NULL);
|
"serial", NULL);
|
if (retval) {
|
if (retval) {
|
restore_flags(flags);
|
restore_flags(flags);
|
if (suser()) {
|
if (suser()) {
|
if (info->tty)
|
if (info->tty)
|
set_bit(TTY_IO_ERROR,
|
set_bit(TTY_IO_ERROR,
|
&info->tty->flags);
|
&info->tty->flags);
|
return 0;
|
return 0;
|
} else
|
} else
|
return retval;
|
return retval;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Clear the interrupt registers.
|
* Clear the interrupt registers.
|
*/
|
*/
|
/* (void) serial_inp(info, UART_LSR); */ /* (see above) */
|
/* (void) serial_inp(info, UART_LSR); */ /* (see above) */
|
(void) serial_inp(info, UART_RX);
|
(void) serial_inp(info, UART_RX);
|
(void) serial_inp(info, UART_IIR);
|
(void) serial_inp(info, UART_IIR);
|
(void) serial_inp(info, UART_MSR);
|
(void) serial_inp(info, UART_MSR);
|
|
|
/*
|
/*
|
* Now, initialize the UART
|
* Now, initialize the UART
|
*/
|
*/
|
serial_outp(info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
|
serial_outp(info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
|
if (info->flags & ASYNC_FOURPORT) {
|
if (info->flags & ASYNC_FOURPORT) {
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
|
info->MCR_noint = UART_MCR_DTR | UART_MCR_OUT1;
|
info->MCR_noint = UART_MCR_DTR | UART_MCR_OUT1;
|
} else {
|
} else {
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
|
info->MCR_noint = UART_MCR_DTR | UART_MCR_RTS;
|
info->MCR_noint = UART_MCR_DTR | UART_MCR_RTS;
|
}
|
}
|
#if defined(__alpha__) && !defined(CONFIG_PCI)
|
#if defined(__alpha__) && !defined(CONFIG_PCI)
|
info->MCR |= UART_MCR_OUT1 | UART_MCR_OUT2;
|
info->MCR |= UART_MCR_OUT1 | UART_MCR_OUT2;
|
info->MCR_noint |= UART_MCR_OUT1 | UART_MCR_OUT2;
|
info->MCR_noint |= UART_MCR_OUT1 | UART_MCR_OUT2;
|
#endif
|
#endif
|
if (info->irq == 0)
|
if (info->irq == 0)
|
info->MCR = info->MCR_noint;
|
info->MCR = info->MCR_noint;
|
serial_outp(info, UART_MCR, info->MCR);
|
serial_outp(info, UART_MCR, info->MCR);
|
|
|
/*
|
/*
|
* Finally, enable interrupts
|
* Finally, enable interrupts
|
*/
|
*/
|
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
|
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
|
serial_outp(info, UART_IER, info->IER); /* enable interrupts */
|
serial_outp(info, UART_IER, info->IER); /* enable interrupts */
|
|
|
if (info->flags & ASYNC_FOURPORT) {
|
if (info->flags & ASYNC_FOURPORT) {
|
/* Enable interrupts on the AST Fourport board */
|
/* Enable interrupts on the AST Fourport board */
|
ICP = (info->port & 0xFE0) | 0x01F;
|
ICP = (info->port & 0xFE0) | 0x01F;
|
outb_p(0x80, ICP);
|
outb_p(0x80, ICP);
|
(void) inb_p(ICP);
|
(void) inb_p(ICP);
|
}
|
}
|
|
|
/*
|
/*
|
* And clear the interrupt registers again for luck.
|
* And clear the interrupt registers again for luck.
|
*/
|
*/
|
(void)serial_inp(info, UART_LSR);
|
(void)serial_inp(info, UART_LSR);
|
(void)serial_inp(info, UART_RX);
|
(void)serial_inp(info, UART_RX);
|
(void)serial_inp(info, UART_IIR);
|
(void)serial_inp(info, UART_IIR);
|
(void)serial_inp(info, UART_MSR);
|
(void)serial_inp(info, UART_MSR);
|
|
|
if (info->tty)
|
if (info->tty)
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
/*
|
/*
|
* Insert serial port into IRQ chain.
|
* Insert serial port into IRQ chain.
|
*/
|
*/
|
info->prev_port = 0;
|
info->prev_port = 0;
|
info->next_port = IRQ_ports[info->irq];
|
info->next_port = IRQ_ports[info->irq];
|
if (info->next_port)
|
if (info->next_port)
|
info->next_port->prev_port = info;
|
info->next_port->prev_port = info;
|
IRQ_ports[info->irq] = info;
|
IRQ_ports[info->irq] = info;
|
figure_IRQ_timeout(info->irq);
|
figure_IRQ_timeout(info->irq);
|
|
|
/*
|
/*
|
* Set up serial timers...
|
* Set up serial timers...
|
*/
|
*/
|
timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
|
timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
|
timer_active |= 1 << RS_TIMER;
|
timer_active |= 1 << RS_TIMER;
|
|
|
/*
|
/*
|
* and set the speed of the serial port
|
* and set the speed of the serial port
|
*/
|
*/
|
change_speed(info);
|
change_speed(info);
|
|
|
info->flags |= ASYNC_INITIALIZED;
|
info->flags |= ASYNC_INITIALIZED;
|
restore_flags(flags);
|
restore_flags(flags);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine will shutdown a serial port; interrupts are disabled, and
|
* This routine will shutdown a serial port; interrupts are disabled, and
|
* DTR is dropped if the hangup on close termio flag is on.
|
* DTR is dropped if the hangup on close termio flag is on.
|
*/
|
*/
|
static void shutdown(struct async_struct * info)
|
static void shutdown(struct async_struct * info)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
int retval;
|
int retval;
|
|
|
if (!(info->flags & ASYNC_INITIALIZED))
|
if (!(info->flags & ASYNC_INITIALIZED))
|
return;
|
return;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("Shutting down serial port %d (irq %d)....", info->line,
|
printk("Shutting down serial port %d (irq %d)....", info->line,
|
info->irq);
|
info->irq);
|
#endif
|
#endif
|
|
|
save_flags_cli(flags); /* Disable interrupts */
|
save_flags_cli(flags); /* Disable interrupts */
|
|
|
/*
|
/*
|
* clear delta_msr_wait queue to avoid mem leaks: we may free the irq
|
* clear delta_msr_wait queue to avoid mem leaks: we may free the irq
|
* here so the queue might never be waken up
|
* here so the queue might never be waken up
|
*/
|
*/
|
wake_up_interruptible(&info->delta_msr_wait);
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
|
/*
|
/*
|
* First unlink the serial port from the IRQ chain...
|
* First unlink the serial port from the IRQ chain...
|
*/
|
*/
|
if (info->next_port)
|
if (info->next_port)
|
info->next_port->prev_port = info->prev_port;
|
info->next_port->prev_port = info->prev_port;
|
if (info->prev_port)
|
if (info->prev_port)
|
info->prev_port->next_port = info->next_port;
|
info->prev_port->next_port = info->next_port;
|
else
|
else
|
IRQ_ports[info->irq] = info->next_port;
|
IRQ_ports[info->irq] = info->next_port;
|
figure_IRQ_timeout(info->irq);
|
figure_IRQ_timeout(info->irq);
|
|
|
/*
|
/*
|
* Free the IRQ, if necessary
|
* Free the IRQ, if necessary
|
*/
|
*/
|
if (info->irq && (!IRQ_ports[info->irq] ||
|
if (info->irq && (!IRQ_ports[info->irq] ||
|
!IRQ_ports[info->irq]->next_port)) {
|
!IRQ_ports[info->irq]->next_port)) {
|
if (IRQ_ports[info->irq]) {
|
if (IRQ_ports[info->irq]) {
|
free_irq(info->irq, NULL);
|
free_irq(info->irq, NULL);
|
retval = request_irq(info->irq, rs_interrupt_single,
|
retval = request_irq(info->irq, rs_interrupt_single,
|
IRQ_T(info), "serial", NULL);
|
IRQ_T(info), "serial", NULL);
|
|
|
if (retval)
|
if (retval)
|
printk("serial shutdown: request_irq: error %d"
|
printk("serial shutdown: request_irq: error %d"
|
" Couldn't reacquire IRQ.\n", retval);
|
" Couldn't reacquire IRQ.\n", retval);
|
} else
|
} else
|
free_irq(info->irq, NULL);
|
free_irq(info->irq, NULL);
|
}
|
}
|
|
|
if (info->xmit_buf) {
|
if (info->xmit_buf) {
|
free_page((unsigned long) info->xmit_buf);
|
free_page((unsigned long) info->xmit_buf);
|
info->xmit_buf = 0;
|
info->xmit_buf = 0;
|
}
|
}
|
|
|
info->IER = 0;
|
info->IER = 0;
|
serial_outp(info, UART_IER, 0x00); /* disable all intrs */
|
serial_outp(info, UART_IER, 0x00); /* disable all intrs */
|
if (info->flags & ASYNC_FOURPORT) {
|
if (info->flags & ASYNC_FOURPORT) {
|
/* reset interrupts on the AST Fourport board */
|
/* reset interrupts on the AST Fourport board */
|
(void) inb((info->port & 0xFE0) | 0x01F);
|
(void) inb((info->port & 0xFE0) | 0x01F);
|
}
|
}
|
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
|
info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
|
info->MCR_noint &= ~(UART_MCR_DTR|UART_MCR_RTS);
|
info->MCR_noint &= ~(UART_MCR_DTR|UART_MCR_RTS);
|
}
|
}
|
serial_outp(info, UART_MCR, info->MCR_noint);
|
serial_outp(info, UART_MCR, info->MCR_noint);
|
|
|
/* disable FIFO's */
|
/* disable FIFO's */
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
UART_FCR_CLEAR_XMIT));
|
UART_FCR_CLEAR_XMIT));
|
(void)serial_in(info, UART_RX); /* read data port to reset things */
|
(void)serial_in(info, UART_RX); /* read data port to reset things */
|
|
|
if (info->tty)
|
if (info->tty)
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
info->flags &= ~ASYNC_INITIALIZED;
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called to set the UART divisor registers to match
|
* This routine is called to set the UART divisor registers to match
|
* the specified baud rate for a serial port.
|
* the specified baud rate for a serial port.
|
*/
|
*/
|
static void change_speed(struct async_struct *info)
|
static void change_speed(struct async_struct *info)
|
{
|
{
|
unsigned short port;
|
unsigned short port;
|
int quot = 0;
|
int quot = 0;
|
unsigned cflag,cval,fcr;
|
unsigned cflag,cval,fcr;
|
int i;
|
int i;
|
|
|
if (!info->tty || !info->tty->termios)
|
if (!info->tty || !info->tty->termios)
|
return;
|
return;
|
cflag = info->tty->termios->c_cflag;
|
cflag = info->tty->termios->c_cflag;
|
if (!(port = info->port))
|
if (!(port = info->port))
|
return;
|
return;
|
i = cflag & CBAUD;
|
i = cflag & CBAUD;
|
if (i & CBAUDEX) {
|
if (i & CBAUDEX) {
|
i &= ~CBAUDEX;
|
i &= ~CBAUDEX;
|
if (i < 1 || i > 2)
|
if (i < 1 || i > 2)
|
info->tty->termios->c_cflag &= ~CBAUDEX;
|
info->tty->termios->c_cflag &= ~CBAUDEX;
|
else
|
else
|
i += 15;
|
i += 15;
|
}
|
}
|
if (i == 15) {
|
if (i == 15) {
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
i += 1;
|
i += 1;
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
i += 2;
|
i += 2;
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
|
quot = info->custom_divisor;
|
quot = info->custom_divisor;
|
}
|
}
|
if (quot) {
|
if (quot) {
|
info->timeout = ((info->xmit_fifo_size*HZ*15*quot) /
|
info->timeout = ((info->xmit_fifo_size*HZ*15*quot) /
|
info->baud_base) + 2;
|
info->baud_base) + 2;
|
} else if (baud_table[i] == 134) {
|
} else if (baud_table[i] == 134) {
|
quot = (2*info->baud_base / 269);
|
quot = (2*info->baud_base / 269);
|
info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
|
info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
|
} else if (baud_table[i]) {
|
} else if (baud_table[i]) {
|
quot = info->baud_base / baud_table[i];
|
quot = info->baud_base / baud_table[i];
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
|
} else {
|
} else {
|
quot = 0;
|
quot = 0;
|
info->timeout = 0;
|
info->timeout = 0;
|
}
|
}
|
if (quot) {
|
if (quot) {
|
info->MCR |= UART_MCR_DTR;
|
info->MCR |= UART_MCR_DTR;
|
info->MCR_noint |= UART_MCR_DTR;
|
info->MCR_noint |= UART_MCR_DTR;
|
cli();
|
cli();
|
serial_out(info, UART_MCR, info->MCR);
|
serial_out(info, UART_MCR, info->MCR);
|
sti();
|
sti();
|
} else {
|
} else {
|
info->MCR &= ~UART_MCR_DTR;
|
info->MCR &= ~UART_MCR_DTR;
|
info->MCR_noint &= ~UART_MCR_DTR;
|
info->MCR_noint &= ~UART_MCR_DTR;
|
cli();
|
cli();
|
serial_out(info, UART_MCR, info->MCR);
|
serial_out(info, UART_MCR, info->MCR);
|
sti();
|
sti();
|
return;
|
return;
|
}
|
}
|
/* byte size and parity */
|
/* byte size and parity */
|
switch (cflag & CSIZE) {
|
switch (cflag & CSIZE) {
|
case CS5: cval = 0x00; break;
|
case CS5: cval = 0x00; break;
|
case CS6: cval = 0x01; break;
|
case CS6: cval = 0x01; break;
|
case CS7: cval = 0x02; break;
|
case CS7: cval = 0x02; break;
|
case CS8: cval = 0x03; break;
|
case CS8: cval = 0x03; break;
|
default: cval = 0x00; break; /* too keep GCC shut... */
|
default: cval = 0x00; break; /* too keep GCC shut... */
|
}
|
}
|
if (cflag & CSTOPB) {
|
if (cflag & CSTOPB) {
|
cval |= 0x04;
|
cval |= 0x04;
|
}
|
}
|
if (cflag & PARENB)
|
if (cflag & PARENB)
|
cval |= UART_LCR_PARITY;
|
cval |= UART_LCR_PARITY;
|
if (!(cflag & PARODD))
|
if (!(cflag & PARODD))
|
cval |= UART_LCR_EPAR;
|
cval |= UART_LCR_EPAR;
|
if (info->type == PORT_16550A) {
|
if (info->type == PORT_16550A) {
|
if ((info->baud_base / quot) < 2400)
|
if ((info->baud_base / quot) < 2400)
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
|
else
|
else
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
|
} else if (info->type == PORT_16650) {
|
} else if (info->type == PORT_16650) {
|
/*
|
/*
|
* On the 16650, we disable the FIFOs altogether
|
* On the 16650, we disable the FIFOs altogether
|
* because of a design bug in how the implement
|
* because of a design bug in how the implement
|
* things. We could support it by completely changing
|
* things. We could support it by completely changing
|
* how we handle the interrupt driver, but not today....
|
* how we handle the interrupt driver, but not today....
|
*
|
*
|
* N.B. Because there's no way to set a FIFO trigger
|
* N.B. Because there's no way to set a FIFO trigger
|
* at 1 char, we'd probably disable at speed below
|
* at 1 char, we'd probably disable at speed below
|
* 2400 baud anyway...
|
* 2400 baud anyway...
|
*/
|
*/
|
fcr = 0;
|
fcr = 0;
|
} else
|
} else
|
fcr = 0;
|
fcr = 0;
|
|
|
/* CTS flow control flag and modem status interrupts */
|
/* CTS flow control flag and modem status interrupts */
|
info->IER &= ~UART_IER_MSI;
|
info->IER &= ~UART_IER_MSI;
|
if (cflag & CRTSCTS) {
|
if (cflag & CRTSCTS) {
|
info->flags |= ASYNC_CTS_FLOW;
|
info->flags |= ASYNC_CTS_FLOW;
|
info->IER |= UART_IER_MSI;
|
info->IER |= UART_IER_MSI;
|
} else
|
} else
|
info->flags &= ~ASYNC_CTS_FLOW;
|
info->flags &= ~ASYNC_CTS_FLOW;
|
if (cflag & CLOCAL)
|
if (cflag & CLOCAL)
|
info->flags &= ~ASYNC_CHECK_CD;
|
info->flags &= ~ASYNC_CHECK_CD;
|
else {
|
else {
|
info->flags |= ASYNC_CHECK_CD;
|
info->flags |= ASYNC_CHECK_CD;
|
info->IER |= UART_IER_MSI;
|
info->IER |= UART_IER_MSI;
|
}
|
}
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
|
|
/*
|
/*
|
* Set up parity check flag
|
* Set up parity check flag
|
*/
|
*/
|
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
|
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
|
|
|
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
|
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
|
if (I_INPCK(info->tty))
|
if (I_INPCK(info->tty))
|
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
|
if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
|
info->read_status_mask |= UART_LSR_BI;
|
info->read_status_mask |= UART_LSR_BI;
|
|
|
info->ignore_status_mask = 0;
|
info->ignore_status_mask = 0;
|
#if 0
|
#if 0
|
/* This should be safe, but for some broken bits of hardware... */
|
/* This should be safe, but for some broken bits of hardware... */
|
if (I_IGNPAR(info->tty)) {
|
if (I_IGNPAR(info->tty)) {
|
info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
|
info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
|
info->read_status_mask |= UART_LSR_PE | UART_LSR_FE;
|
info->read_status_mask |= UART_LSR_PE | UART_LSR_FE;
|
}
|
}
|
#endif
|
#endif
|
if (I_IGNBRK(info->tty)) {
|
if (I_IGNBRK(info->tty)) {
|
info->ignore_status_mask |= UART_LSR_BI;
|
info->ignore_status_mask |= UART_LSR_BI;
|
info->read_status_mask |= UART_LSR_BI;
|
info->read_status_mask |= UART_LSR_BI;
|
/*
|
/*
|
* If we're ignore parity and break indicators, ignore
|
* If we're ignore parity and break indicators, ignore
|
* overruns too. (For real raw support).
|
* overruns too. (For real raw support).
|
*/
|
*/
|
if (I_IGNPAR(info->tty)) {
|
if (I_IGNPAR(info->tty)) {
|
info->ignore_status_mask |= UART_LSR_OE |
|
info->ignore_status_mask |= UART_LSR_OE |
|
UART_LSR_PE | UART_LSR_FE;
|
UART_LSR_PE | UART_LSR_FE;
|
info->read_status_mask |= UART_LSR_OE |
|
info->read_status_mask |= UART_LSR_OE |
|
UART_LSR_PE | UART_LSR_FE;
|
UART_LSR_PE | UART_LSR_FE;
|
}
|
}
|
}
|
}
|
cli();
|
cli();
|
serial_outp(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
|
serial_outp(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
|
serial_outp(info, UART_DLL, quot & 0xff); /* LS of divisor */
|
serial_outp(info, UART_DLL, quot & 0xff); /* LS of divisor */
|
serial_outp(info, UART_DLM, quot >> 8); /* MS of divisor */
|
serial_outp(info, UART_DLM, quot >> 8); /* MS of divisor */
|
serial_outp(info, UART_LCR, cval); /* reset DLAB */
|
serial_outp(info, UART_LCR, cval); /* reset DLAB */
|
serial_outp(info, UART_FCR, fcr); /* set fcr */
|
serial_outp(info, UART_FCR, fcr); /* set fcr */
|
sti();
|
sti();
|
}
|
}
|
|
|
static void rs_put_char(struct tty_struct *tty, unsigned char ch)
|
static void rs_put_char(struct tty_struct *tty, unsigned char ch)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_put_char"))
|
if (serial_paranoia_check(info, tty->device, "rs_put_char"))
|
return;
|
return;
|
|
|
if (!tty || !info->xmit_buf)
|
if (!tty || !info->xmit_buf)
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
|
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
|
|
info->xmit_buf[info->xmit_head++] = ch;
|
info->xmit_buf[info->xmit_head++] = ch;
|
info->xmit_head &= SERIAL_XMIT_SIZE-1;
|
info->xmit_head &= SERIAL_XMIT_SIZE-1;
|
info->xmit_cnt++;
|
info->xmit_cnt++;
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
static void rs_flush_chars(struct tty_struct *tty)
|
static void rs_flush_chars(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
|
if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
|
return;
|
return;
|
|
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
!info->xmit_buf)
|
!info->xmit_buf)
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
info->IER |= UART_IER_THRI;
|
info->IER |= UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
static int rs_write(struct tty_struct * tty, int from_user,
|
static int rs_write(struct tty_struct * tty, int from_user,
|
const unsigned char *buf, int count)
|
const unsigned char *buf, int count)
|
{
|
{
|
int c, total = 0;
|
int c, total = 0;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_write"))
|
if (serial_paranoia_check(info, tty->device, "rs_write"))
|
return 0;
|
return 0;
|
|
|
if (!tty || !info->xmit_buf || !tmp_buf)
|
if (!tty || !info->xmit_buf || !tmp_buf)
|
return 0;
|
return 0;
|
|
|
if (from_user)
|
if (from_user)
|
down(&tmp_buf_sem);
|
down(&tmp_buf_sem);
|
save_flags(flags);
|
save_flags(flags);
|
while (1) {
|
while (1) {
|
cli();
|
cli();
|
c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
if (c <= 0)
|
if (c <= 0)
|
break;
|
break;
|
|
|
if (from_user) {
|
if (from_user) {
|
memcpy_fromfs(tmp_buf, buf, c);
|
memcpy_fromfs(tmp_buf, buf, c);
|
c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
|
memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
|
} else
|
} else
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt += c;
|
info->xmit_cnt += c;
|
restore_flags(flags);
|
restore_flags(flags);
|
buf += c;
|
buf += c;
|
count -= c;
|
count -= c;
|
total += c;
|
total += c;
|
}
|
}
|
if (from_user)
|
if (from_user)
|
up(&tmp_buf_sem);
|
up(&tmp_buf_sem);
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
|
!(info->IER & UART_IER_THRI)) {
|
!(info->IER & UART_IER_THRI)) {
|
info->IER |= UART_IER_THRI;
|
info->IER |= UART_IER_THRI;
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
return total;
|
return total;
|
}
|
}
|
|
|
static int rs_write_room(struct tty_struct *tty)
|
static int rs_write_room(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
int ret;
|
int ret;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_write_room"))
|
if (serial_paranoia_check(info, tty->device, "rs_write_room"))
|
return 0;
|
return 0;
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
if (ret < 0)
|
if (ret < 0)
|
ret = 0;
|
ret = 0;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static int rs_chars_in_buffer(struct tty_struct *tty)
|
static int rs_chars_in_buffer(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
|
if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
|
return 0;
|
return 0;
|
return info->xmit_cnt;
|
return info->xmit_cnt;
|
}
|
}
|
|
|
static void rs_flush_buffer(struct tty_struct *tty)
|
static void rs_flush_buffer(struct tty_struct *tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
|
if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
|
return;
|
return;
|
cli();
|
cli();
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
sti();
|
sti();
|
wake_up_interruptible(&tty->write_wait);
|
wake_up_interruptible(&tty->write_wait);
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
tty->ldisc.write_wakeup)
|
tty->ldisc.write_wakeup)
|
(tty->ldisc.write_wakeup)(tty);
|
(tty->ldisc.write_wakeup)(tty);
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_throttle()
|
* rs_throttle()
|
*
|
*
|
* This routine is called by the upper-layer tty layer to signal that
|
* This routine is called by the upper-layer tty layer to signal that
|
* incoming characters should be throttled.
|
* incoming characters should be throttled.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static void rs_throttle(struct tty_struct * tty)
|
static void rs_throttle(struct tty_struct * tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
#ifdef SERIAL_DEBUG_THROTTLE
|
#ifdef SERIAL_DEBUG_THROTTLE
|
char buf[64];
|
char buf[64];
|
|
|
printk("throttle %s: %d....\n", _tty_name(tty, buf),
|
printk("throttle %s: %d....\n", _tty_name(tty, buf),
|
tty->ldisc.chars_in_buffer(tty));
|
tty->ldisc.chars_in_buffer(tty));
|
#endif
|
#endif
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_throttle"))
|
if (serial_paranoia_check(info, tty->device, "rs_throttle"))
|
return;
|
return;
|
|
|
if (I_IXOFF(tty))
|
if (I_IXOFF(tty))
|
info->x_char = STOP_CHAR(tty);
|
info->x_char = STOP_CHAR(tty);
|
|
|
info->MCR &= ~UART_MCR_RTS;
|
info->MCR &= ~UART_MCR_RTS;
|
info->MCR_noint &= ~UART_MCR_RTS;
|
info->MCR_noint &= ~UART_MCR_RTS;
|
cli();
|
cli();
|
serial_out(info, UART_MCR, info->MCR);
|
serial_out(info, UART_MCR, info->MCR);
|
sti();
|
sti();
|
}
|
}
|
|
|
static void rs_unthrottle(struct tty_struct * tty)
|
static void rs_unthrottle(struct tty_struct * tty)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
#ifdef SERIAL_DEBUG_THROTTLE
|
#ifdef SERIAL_DEBUG_THROTTLE
|
char buf[64];
|
char buf[64];
|
|
|
printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
|
printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
|
tty->ldisc.chars_in_buffer(tty));
|
tty->ldisc.chars_in_buffer(tty));
|
#endif
|
#endif
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
|
if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
|
return;
|
return;
|
|
|
if (I_IXOFF(tty)) {
|
if (I_IXOFF(tty)) {
|
if (info->x_char)
|
if (info->x_char)
|
info->x_char = 0;
|
info->x_char = 0;
|
else
|
else
|
info->x_char = START_CHAR(tty);
|
info->x_char = START_CHAR(tty);
|
}
|
}
|
info->MCR |= UART_MCR_RTS;
|
info->MCR |= UART_MCR_RTS;
|
info->MCR_noint |= UART_MCR_RTS;
|
info->MCR_noint |= UART_MCR_RTS;
|
cli();
|
cli();
|
serial_out(info, UART_MCR, info->MCR);
|
serial_out(info, UART_MCR, info->MCR);
|
sti();
|
sti();
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_ioctl() and friends
|
* rs_ioctl() and friends
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
|
|
static int get_serial_info(struct async_struct * info,
|
static int get_serial_info(struct async_struct * info,
|
struct serial_struct * retinfo)
|
struct serial_struct * retinfo)
|
{
|
{
|
struct serial_struct tmp;
|
struct serial_struct tmp;
|
|
|
if (!retinfo)
|
if (!retinfo)
|
return -EFAULT;
|
return -EFAULT;
|
memset(&tmp, 0, sizeof(tmp));
|
memset(&tmp, 0, sizeof(tmp));
|
tmp.type = info->type;
|
tmp.type = info->type;
|
tmp.line = info->line;
|
tmp.line = info->line;
|
tmp.port = info->port;
|
tmp.port = info->port;
|
tmp.irq = info->irq;
|
tmp.irq = info->irq;
|
tmp.flags = info->flags;
|
tmp.flags = info->flags;
|
tmp.baud_base = info->baud_base;
|
tmp.baud_base = info->baud_base;
|
tmp.close_delay = info->close_delay;
|
tmp.close_delay = info->close_delay;
|
tmp.closing_wait = info->closing_wait;
|
tmp.closing_wait = info->closing_wait;
|
tmp.custom_divisor = info->custom_divisor;
|
tmp.custom_divisor = info->custom_divisor;
|
tmp.hub6 = info->hub6;
|
tmp.hub6 = info->hub6;
|
memcpy_tofs(retinfo,&tmp,sizeof(*retinfo));
|
memcpy_tofs(retinfo,&tmp,sizeof(*retinfo));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int set_serial_info(struct async_struct * info,
|
static int set_serial_info(struct async_struct * info,
|
struct serial_struct * new_info)
|
struct serial_struct * new_info)
|
{
|
{
|
struct serial_struct new_serial;
|
struct serial_struct new_serial;
|
struct async_struct old_info;
|
struct async_struct old_info;
|
unsigned int i,change_irq,change_port;
|
unsigned int i,change_irq,change_port;
|
int retval = 0;
|
int retval = 0;
|
|
|
if (!new_info)
|
if (!new_info)
|
return -EFAULT;
|
return -EFAULT;
|
memcpy_fromfs(&new_serial,new_info,sizeof(new_serial));
|
memcpy_fromfs(&new_serial,new_info,sizeof(new_serial));
|
old_info = *info;
|
old_info = *info;
|
|
|
change_irq = new_serial.irq != info->irq;
|
change_irq = new_serial.irq != info->irq;
|
change_port = (new_serial.port != info->port) || (new_serial.hub6 != info->hub6);
|
change_port = (new_serial.port != info->port) || (new_serial.hub6 != info->hub6);
|
|
|
if (!suser()) {
|
if (!suser()) {
|
if (change_irq || change_port ||
|
if (change_irq || change_port ||
|
(new_serial.baud_base != info->baud_base) ||
|
(new_serial.baud_base != info->baud_base) ||
|
(new_serial.type != info->type) ||
|
(new_serial.type != info->type) ||
|
(new_serial.close_delay != info->close_delay) ||
|
(new_serial.close_delay != info->close_delay) ||
|
((new_serial.flags & ~ASYNC_USR_MASK) !=
|
((new_serial.flags & ~ASYNC_USR_MASK) !=
|
(info->flags & ~ASYNC_USR_MASK)))
|
(info->flags & ~ASYNC_USR_MASK)))
|
return -EPERM;
|
return -EPERM;
|
info->flags = ((info->flags & ~ASYNC_USR_MASK) |
|
info->flags = ((info->flags & ~ASYNC_USR_MASK) |
|
(new_serial.flags & ASYNC_USR_MASK));
|
(new_serial.flags & ASYNC_USR_MASK));
|
info->custom_divisor = new_serial.custom_divisor;
|
info->custom_divisor = new_serial.custom_divisor;
|
goto check_and_exit;
|
goto check_and_exit;
|
}
|
}
|
#if 0
|
#if 0
|
if (new_serial.irq == 2)
|
if (new_serial.irq == 2)
|
new_serial.irq = 9;
|
new_serial.irq = 9;
|
|
|
if ((new_serial.irq > 15) || (new_serial.port > 0xffff) ||
|
if ((new_serial.irq > 15) || (new_serial.port > 0xffff) ||
|
(new_serial.type < PORT_UNKNOWN) || (new_serial.type > PORT_MAX)) {
|
(new_serial.type < PORT_UNKNOWN) || (new_serial.type > PORT_MAX)) {
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
#else
|
#else
|
if ((new_serial.irq > 31) || (new_serial.type < PORT_UNKNOWN) ||
|
if ((new_serial.irq > 31) || (new_serial.type < PORT_UNKNOWN) ||
|
(new_serial.type > PORT_MAX)) {
|
(new_serial.type > PORT_MAX)) {
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
#endif
|
#endif
|
|
|
/* Make sure address is not already in use */
|
/* Make sure address is not already in use */
|
if (new_serial.type) {
|
if (new_serial.type) {
|
for (i = 0 ; i < NR_PORTS; i++)
|
for (i = 0 ; i < NR_PORTS; i++)
|
if ((info != &rs_table[i]) &&
|
if ((info != &rs_table[i]) &&
|
(rs_table[i].port == new_serial.port) &&
|
(rs_table[i].port == new_serial.port) &&
|
rs_table[i].type)
|
rs_table[i].type)
|
return -EADDRINUSE;
|
return -EADDRINUSE;
|
}
|
}
|
|
|
if ((change_port || change_irq) && (info->count > 1))
|
if ((change_port || change_irq) && (info->count > 1))
|
return -EBUSY;
|
return -EBUSY;
|
|
|
/*
|
/*
|
* OK, past this point, all the error checking has been done.
|
* OK, past this point, all the error checking has been done.
|
* At this point, we start making changes.....
|
* At this point, we start making changes.....
|
*/
|
*/
|
|
|
info->baud_base = new_serial.baud_base;
|
info->baud_base = new_serial.baud_base;
|
info->flags = ((info->flags & ~ASYNC_FLAGS) |
|
info->flags = ((info->flags & ~ASYNC_FLAGS) |
|
(new_serial.flags & ASYNC_FLAGS));
|
(new_serial.flags & ASYNC_FLAGS));
|
info->custom_divisor = new_serial.custom_divisor;
|
info->custom_divisor = new_serial.custom_divisor;
|
info->type = new_serial.type;
|
info->type = new_serial.type;
|
info->close_delay = new_serial.close_delay * HZ/100;
|
info->close_delay = new_serial.close_delay * HZ/100;
|
info->closing_wait = new_serial.closing_wait * HZ/100;
|
info->closing_wait = new_serial.closing_wait * HZ/100;
|
|
|
release_region(info->port,8);
|
release_region(info->port,8);
|
if (change_port || change_irq) {
|
if (change_port || change_irq) {
|
/*
|
/*
|
* We need to shutdown the serial port at the old
|
* We need to shutdown the serial port at the old
|
* port/irq combination.
|
* port/irq combination.
|
*/
|
*/
|
shutdown(info);
|
shutdown(info);
|
info->irq = new_serial.irq;
|
info->irq = new_serial.irq;
|
info->port = new_serial.port;
|
info->port = new_serial.port;
|
info->hub6 = new_serial.hub6;
|
info->hub6 = new_serial.hub6;
|
}
|
}
|
if(info->type != PORT_UNKNOWN)
|
if(info->type != PORT_UNKNOWN)
|
request_region(info->port,8,"serial(set)");
|
request_region(info->port,8,"serial(set)");
|
|
|
|
|
check_and_exit:
|
check_and_exit:
|
if (!info->port || !info->type)
|
if (!info->port || !info->type)
|
return 0;
|
return 0;
|
if (info->flags & ASYNC_INITIALIZED) {
|
if (info->flags & ASYNC_INITIALIZED) {
|
if (((old_info.flags & ASYNC_SPD_MASK) !=
|
if (((old_info.flags & ASYNC_SPD_MASK) !=
|
(info->flags & ASYNC_SPD_MASK)) ||
|
(info->flags & ASYNC_SPD_MASK)) ||
|
(old_info.custom_divisor != info->custom_divisor))
|
(old_info.custom_divisor != info->custom_divisor))
|
change_speed(info);
|
change_speed(info);
|
} else
|
} else
|
retval = startup(info);
|
retval = startup(info);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* get_lsr_info - get line status register info
|
* get_lsr_info - get line status register info
|
*
|
*
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
* is emptied. On bus types like RS485, the transmitter must
|
* is emptied. On bus types like RS485, the transmitter must
|
* release the bus after transmitting. This must be done when
|
* release the bus after transmitting. This must be done when
|
* the transmit shift register is empty, not be done when the
|
* the transmit shift register is empty, not be done when the
|
* transmit holding register is empty. This functionality
|
* transmit holding register is empty. This functionality
|
* allows an RS485 driver to be written in user space.
|
* allows an RS485 driver to be written in user space.
|
*/
|
*/
|
static int get_lsr_info(struct async_struct * info, unsigned int *value)
|
static int get_lsr_info(struct async_struct * info, unsigned int *value)
|
{
|
{
|
unsigned char status;
|
unsigned char status;
|
unsigned int result;
|
unsigned int result;
|
|
|
cli();
|
cli();
|
status = serial_in(info, UART_LSR);
|
status = serial_in(info, UART_LSR);
|
sti();
|
sti();
|
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
|
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
|
put_user(result,value);
|
put_user(result,value);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int get_modem_info(struct async_struct * info, unsigned int *value)
|
static int get_modem_info(struct async_struct * info, unsigned int *value)
|
{
|
{
|
unsigned char control, status;
|
unsigned char control, status;
|
unsigned int result;
|
unsigned int result;
|
|
|
control = info->MCR;
|
control = info->MCR;
|
cli();
|
cli();
|
status = serial_in(info, UART_MSR);
|
status = serial_in(info, UART_MSR);
|
sti();
|
sti();
|
result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
|
result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
|
| ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
|
| ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
|
| ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
|
| ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
|
| ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
|
| ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
|
| ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
|
| ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
|
| ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
|
| ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
|
put_user(result,value);
|
put_user(result,value);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int set_modem_info(struct async_struct * info, unsigned int cmd,
|
static int set_modem_info(struct async_struct * info, unsigned int cmd,
|
unsigned int *value)
|
unsigned int *value)
|
{
|
{
|
int error;
|
int error;
|
unsigned int arg;
|
unsigned int arg;
|
|
|
error = verify_area(VERIFY_READ, value, sizeof(int));
|
error = verify_area(VERIFY_READ, value, sizeof(int));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
arg = get_user(value);
|
arg = get_user(value);
|
switch (cmd) {
|
switch (cmd) {
|
case TIOCMBIS:
|
case TIOCMBIS:
|
if (arg & TIOCM_RTS) {
|
if (arg & TIOCM_RTS) {
|
info->MCR |= UART_MCR_RTS;
|
info->MCR |= UART_MCR_RTS;
|
info->MCR_noint |= UART_MCR_RTS;
|
info->MCR_noint |= UART_MCR_RTS;
|
}
|
}
|
if (arg & TIOCM_DTR) {
|
if (arg & TIOCM_DTR) {
|
info->MCR |= UART_MCR_DTR;
|
info->MCR |= UART_MCR_DTR;
|
info->MCR_noint |= UART_MCR_DTR;
|
info->MCR_noint |= UART_MCR_DTR;
|
}
|
}
|
break;
|
break;
|
case TIOCMBIC:
|
case TIOCMBIC:
|
if (arg & TIOCM_RTS) {
|
if (arg & TIOCM_RTS) {
|
info->MCR &= ~UART_MCR_RTS;
|
info->MCR &= ~UART_MCR_RTS;
|
info->MCR_noint &= ~UART_MCR_RTS;
|
info->MCR_noint &= ~UART_MCR_RTS;
|
}
|
}
|
if (arg & TIOCM_DTR) {
|
if (arg & TIOCM_DTR) {
|
info->MCR &= ~UART_MCR_DTR;
|
info->MCR &= ~UART_MCR_DTR;
|
info->MCR_noint &= ~UART_MCR_DTR;
|
info->MCR_noint &= ~UART_MCR_DTR;
|
}
|
}
|
break;
|
break;
|
case TIOCMSET:
|
case TIOCMSET:
|
info->MCR = ((info->MCR & ~(UART_MCR_RTS | UART_MCR_DTR))
|
info->MCR = ((info->MCR & ~(UART_MCR_RTS | UART_MCR_DTR))
|
| ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
|
| ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
|
| ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
|
| ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
|
info->MCR_noint = ((info->MCR_noint
|
info->MCR_noint = ((info->MCR_noint
|
& ~(UART_MCR_RTS | UART_MCR_DTR))
|
& ~(UART_MCR_RTS | UART_MCR_DTR))
|
| ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
|
| ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
|
| ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
|
| ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
|
break;
|
break;
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
cli();
|
cli();
|
serial_out(info, UART_MCR, info->MCR);
|
serial_out(info, UART_MCR, info->MCR);
|
sti();
|
sti();
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int do_autoconfig(struct async_struct * info)
|
static int do_autoconfig(struct async_struct * info)
|
{
|
{
|
int retval;
|
int retval;
|
|
|
if (!suser())
|
if (!suser())
|
return -EPERM;
|
return -EPERM;
|
|
|
if (info->count > 1)
|
if (info->count > 1)
|
return -EBUSY;
|
return -EBUSY;
|
|
|
shutdown(info);
|
shutdown(info);
|
|
|
cli();
|
cli();
|
autoconfig(info);
|
autoconfig(info);
|
sti();
|
sti();
|
|
|
retval = startup(info);
|
retval = startup(info);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* This routine sends a break character out the serial port.
|
* This routine sends a break character out the serial port.
|
*/
|
*/
|
static void send_break( struct async_struct * info, int duration)
|
static void send_break( struct async_struct * info, int duration)
|
{
|
{
|
if (!info->port)
|
if (!info->port)
|
return;
|
return;
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + duration;
|
current->timeout = jiffies + duration;
|
cli();
|
cli();
|
serial_out(info, UART_LCR, serial_inp(info, UART_LCR) | UART_LCR_SBC);
|
serial_out(info, UART_LCR, serial_inp(info, UART_LCR) | UART_LCR_SBC);
|
schedule();
|
schedule();
|
serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
|
serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
|
sti();
|
sti();
|
}
|
}
|
|
|
/*
|
/*
|
* This routine returns a bitfield of "wild interrupts". Basically,
|
* This routine returns a bitfield of "wild interrupts". Basically,
|
* any unclaimed interrupts which is flapping around.
|
* any unclaimed interrupts which is flapping around.
|
*/
|
*/
|
static int check_wild_interrupts(int doprint)
|
static int check_wild_interrupts(int doprint)
|
{
|
{
|
int i, mask;
|
int i, mask;
|
int wild_interrupts = 0;
|
int wild_interrupts = 0;
|
int irq_lines;
|
int irq_lines;
|
unsigned long timeout;
|
unsigned long timeout;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
/* Turn on interrupts (they may be off) */
|
/* Turn on interrupts (they may be off) */
|
save_flags(flags); sti();
|
save_flags(flags); sti();
|
|
|
irq_lines = grab_all_interrupts(0);
|
irq_lines = grab_all_interrupts(0);
|
|
|
/*
|
/*
|
* Delay for 0.1 seconds -- we use a busy loop since this may
|
* Delay for 0.1 seconds -- we use a busy loop since this may
|
* occur during the bootup sequence
|
* occur during the bootup sequence
|
*/
|
*/
|
timeout = jiffies+HZ/10;
|
timeout = jiffies+HZ/10;
|
while (timeout >= jiffies)
|
while (timeout >= jiffies)
|
;
|
;
|
|
|
rs_triggered = 0; /* Reset after letting things settle */
|
rs_triggered = 0; /* Reset after letting things settle */
|
|
|
timeout = jiffies+HZ/10;
|
timeout = jiffies+HZ/10;
|
while (timeout >= jiffies)
|
while (timeout >= jiffies)
|
;
|
;
|
|
|
for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
|
for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
|
if ((rs_triggered & (1 << i)) &&
|
if ((rs_triggered & (1 << i)) &&
|
(irq_lines & (1 << i))) {
|
(irq_lines & (1 << i))) {
|
wild_interrupts |= mask;
|
wild_interrupts |= mask;
|
if (doprint)
|
if (doprint)
|
printk("Wild interrupt? (IRQ %d)\n", i);
|
printk("Wild interrupt? (IRQ %d)\n", i);
|
}
|
}
|
}
|
}
|
free_all_interrupts(irq_lines);
|
free_all_interrupts(irq_lines);
|
restore_flags(flags);
|
restore_flags(flags);
|
return wild_interrupts;
|
return wild_interrupts;
|
}
|
}
|
|
|
static int get_multiport_struct(struct async_struct * info,
|
static int get_multiport_struct(struct async_struct * info,
|
struct serial_multiport_struct *retinfo)
|
struct serial_multiport_struct *retinfo)
|
{
|
{
|
struct serial_multiport_struct ret;
|
struct serial_multiport_struct ret;
|
struct rs_multiport_struct *multi;
|
struct rs_multiport_struct *multi;
|
|
|
multi = &rs_multiport[info->irq];
|
multi = &rs_multiport[info->irq];
|
|
|
ret.port_monitor = multi->port_monitor;
|
ret.port_monitor = multi->port_monitor;
|
|
|
ret.port1 = multi->port1;
|
ret.port1 = multi->port1;
|
ret.mask1 = multi->mask1;
|
ret.mask1 = multi->mask1;
|
ret.match1 = multi->match1;
|
ret.match1 = multi->match1;
|
|
|
ret.port2 = multi->port2;
|
ret.port2 = multi->port2;
|
ret.mask2 = multi->mask2;
|
ret.mask2 = multi->mask2;
|
ret.match2 = multi->match2;
|
ret.match2 = multi->match2;
|
|
|
ret.port3 = multi->port3;
|
ret.port3 = multi->port3;
|
ret.mask3 = multi->mask3;
|
ret.mask3 = multi->mask3;
|
ret.match3 = multi->match3;
|
ret.match3 = multi->match3;
|
|
|
ret.port4 = multi->port4;
|
ret.port4 = multi->port4;
|
ret.mask4 = multi->mask4;
|
ret.mask4 = multi->mask4;
|
ret.match4 = multi->match4;
|
ret.match4 = multi->match4;
|
|
|
ret.irq = info->irq;
|
ret.irq = info->irq;
|
|
|
memcpy_tofs(retinfo,&ret,sizeof(*retinfo));
|
memcpy_tofs(retinfo,&ret,sizeof(*retinfo));
|
return 0;
|
return 0;
|
|
|
}
|
}
|
|
|
static int set_multiport_struct(struct async_struct * info,
|
static int set_multiport_struct(struct async_struct * info,
|
struct serial_multiport_struct *in_multi)
|
struct serial_multiport_struct *in_multi)
|
{
|
{
|
struct serial_multiport_struct new_multi;
|
struct serial_multiport_struct new_multi;
|
struct rs_multiport_struct *multi;
|
struct rs_multiport_struct *multi;
|
int was_multi, now_multi;
|
int was_multi, now_multi;
|
int retval;
|
int retval;
|
void (*handler)(int, void *, struct pt_regs *);
|
void (*handler)(int, void *, struct pt_regs *);
|
|
|
if (!suser())
|
if (!suser())
|
return -EPERM;
|
return -EPERM;
|
if (!in_multi)
|
if (!in_multi)
|
return -EFAULT;
|
return -EFAULT;
|
memcpy_fromfs(&new_multi, in_multi,
|
memcpy_fromfs(&new_multi, in_multi,
|
sizeof(struct serial_multiport_struct));
|
sizeof(struct serial_multiport_struct));
|
|
|
if (new_multi.irq != info->irq || info->irq == 0 ||
|
if (new_multi.irq != info->irq || info->irq == 0 ||
|
!IRQ_ports[info->irq])
|
!IRQ_ports[info->irq])
|
return -EINVAL;
|
return -EINVAL;
|
|
|
multi = &rs_multiport[info->irq];
|
multi = &rs_multiport[info->irq];
|
was_multi = (multi->port1 != 0);
|
was_multi = (multi->port1 != 0);
|
|
|
multi->port_monitor = new_multi.port_monitor;
|
multi->port_monitor = new_multi.port_monitor;
|
|
|
if (multi->port1)
|
if (multi->port1)
|
release_region(multi->port1,1);
|
release_region(multi->port1,1);
|
multi->port1 = new_multi.port1;
|
multi->port1 = new_multi.port1;
|
multi->mask1 = new_multi.mask1;
|
multi->mask1 = new_multi.mask1;
|
multi->match1 = new_multi.match1;
|
multi->match1 = new_multi.match1;
|
if (multi->port1)
|
if (multi->port1)
|
request_region(multi->port1,1,"serial(multiport1)");
|
request_region(multi->port1,1,"serial(multiport1)");
|
|
|
if (multi->port2)
|
if (multi->port2)
|
release_region(multi->port2,1);
|
release_region(multi->port2,1);
|
multi->port2 = new_multi.port2;
|
multi->port2 = new_multi.port2;
|
multi->mask2 = new_multi.mask2;
|
multi->mask2 = new_multi.mask2;
|
multi->match2 = new_multi.match2;
|
multi->match2 = new_multi.match2;
|
if (multi->port2)
|
if (multi->port2)
|
request_region(multi->port2,1,"serial(multiport2)");
|
request_region(multi->port2,1,"serial(multiport2)");
|
|
|
if (multi->port3)
|
if (multi->port3)
|
release_region(multi->port3,1);
|
release_region(multi->port3,1);
|
multi->port3 = new_multi.port3;
|
multi->port3 = new_multi.port3;
|
multi->mask3 = new_multi.mask3;
|
multi->mask3 = new_multi.mask3;
|
multi->match3 = new_multi.match3;
|
multi->match3 = new_multi.match3;
|
if (multi->port3)
|
if (multi->port3)
|
request_region(multi->port3,1,"serial(multiport3)");
|
request_region(multi->port3,1,"serial(multiport3)");
|
|
|
if (multi->port4)
|
if (multi->port4)
|
release_region(multi->port4,1);
|
release_region(multi->port4,1);
|
multi->port4 = new_multi.port4;
|
multi->port4 = new_multi.port4;
|
multi->mask4 = new_multi.mask4;
|
multi->mask4 = new_multi.mask4;
|
multi->match4 = new_multi.match4;
|
multi->match4 = new_multi.match4;
|
if (multi->port4)
|
if (multi->port4)
|
request_region(multi->port4,1,"serial(multiport4)");
|
request_region(multi->port4,1,"serial(multiport4)");
|
|
|
now_multi = (multi->port1 != 0);
|
now_multi = (multi->port1 != 0);
|
|
|
if (IRQ_ports[info->irq]->next_port &&
|
if (IRQ_ports[info->irq]->next_port &&
|
(was_multi != now_multi)) {
|
(was_multi != now_multi)) {
|
free_irq(info->irq, NULL);
|
free_irq(info->irq, NULL);
|
if (now_multi)
|
if (now_multi)
|
handler = rs_interrupt_multi;
|
handler = rs_interrupt_multi;
|
else
|
else
|
handler = rs_interrupt;
|
handler = rs_interrupt;
|
|
|
retval = request_irq(info->irq, handler, IRQ_T(info),
|
retval = request_irq(info->irq, handler, IRQ_T(info),
|
"serial", NULL);
|
"serial", NULL);
|
if (retval) {
|
if (retval) {
|
printk("Couldn't reallocate serial interrupt "
|
printk("Couldn't reallocate serial interrupt "
|
"driver!!\n");
|
"driver!!\n");
|
}
|
}
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int rs_ioctl(struct tty_struct *tty, struct file * file,
|
static int rs_ioctl(struct tty_struct *tty, struct file * file,
|
unsigned int cmd, unsigned long arg)
|
unsigned int cmd, unsigned long arg)
|
{
|
{
|
int error;
|
int error;
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
int retval;
|
int retval;
|
struct async_icount cprev, cnow; /* kernel counter temps */
|
struct async_icount cprev, cnow; /* kernel counter temps */
|
struct serial_icounter_struct *p_cuser; /* user space */
|
struct serial_icounter_struct *p_cuser; /* user space */
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
|
if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
|
return -ENODEV;
|
return -ENODEV;
|
|
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
|
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
|
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
|
(cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) &&
|
(cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) &&
|
(cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
|
(cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
switch (cmd) {
|
switch (cmd) {
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
retval = tty_check_change(tty);
|
retval = tty_check_change(tty);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
tty_wait_until_sent(tty, 0);
|
tty_wait_until_sent(tty, 0);
|
if (!arg)
|
if (!arg)
|
send_break(info, HZ/4); /* 1/4 second */
|
send_break(info, HZ/4); /* 1/4 second */
|
return 0;
|
return 0;
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
retval = tty_check_change(tty);
|
retval = tty_check_change(tty);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
tty_wait_until_sent(tty, 0);
|
tty_wait_until_sent(tty, 0);
|
send_break(info, arg ? arg*(HZ/10) : HZ/4);
|
send_break(info, arg ? arg*(HZ/10) : HZ/4);
|
return 0;
|
return 0;
|
case TIOCGSOFTCAR:
|
case TIOCGSOFTCAR:
|
error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
|
error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
put_fs_long(C_CLOCAL(tty) ? 1 : 0,
|
put_fs_long(C_CLOCAL(tty) ? 1 : 0,
|
(unsigned long *) arg);
|
(unsigned long *) arg);
|
return 0;
|
return 0;
|
case TIOCSSOFTCAR:
|
case TIOCSSOFTCAR:
|
error = verify_area(VERIFY_READ, (void *) arg,sizeof(long));
|
error = verify_area(VERIFY_READ, (void *) arg,sizeof(long));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
arg = get_fs_long((unsigned long *) arg);
|
arg = get_fs_long((unsigned long *) arg);
|
tty->termios->c_cflag =
|
tty->termios->c_cflag =
|
((tty->termios->c_cflag & ~CLOCAL) |
|
((tty->termios->c_cflag & ~CLOCAL) |
|
(arg ? CLOCAL : 0));
|
(arg ? CLOCAL : 0));
|
return 0;
|
return 0;
|
case TIOCMGET:
|
case TIOCMGET:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(unsigned int));
|
sizeof(unsigned int));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return get_modem_info(info, (unsigned int *) arg);
|
return get_modem_info(info, (unsigned int *) arg);
|
case TIOCMBIS:
|
case TIOCMBIS:
|
case TIOCMBIC:
|
case TIOCMBIC:
|
case TIOCMSET:
|
case TIOCMSET:
|
return set_modem_info(info, cmd, (unsigned int *) arg);
|
return set_modem_info(info, cmd, (unsigned int *) arg);
|
case TIOCGSERIAL:
|
case TIOCGSERIAL:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct serial_struct));
|
sizeof(struct serial_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return get_serial_info(info,
|
return get_serial_info(info,
|
(struct serial_struct *) arg);
|
(struct serial_struct *) arg);
|
case TIOCSSERIAL:
|
case TIOCSSERIAL:
|
error = verify_area(VERIFY_READ, (void *) arg,
|
error = verify_area(VERIFY_READ, (void *) arg,
|
sizeof(struct serial_struct));
|
sizeof(struct serial_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return set_serial_info(info,
|
return set_serial_info(info,
|
(struct serial_struct *) arg);
|
(struct serial_struct *) arg);
|
case TIOCSERCONFIG:
|
case TIOCSERCONFIG:
|
return do_autoconfig(info);
|
return do_autoconfig(info);
|
|
|
case TIOCSERGWILD:
|
case TIOCSERGWILD:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(int));
|
sizeof(int));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
put_fs_long(rs_wild_int_mask, (unsigned long *) arg);
|
put_fs_long(rs_wild_int_mask, (unsigned long *) arg);
|
return 0;
|
return 0;
|
|
|
case TIOCSERGETLSR: /* Get line status register */
|
case TIOCSERGETLSR: /* Get line status register */
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(unsigned int));
|
sizeof(unsigned int));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
else
|
else
|
return get_lsr_info(info, (unsigned int *) arg);
|
return get_lsr_info(info, (unsigned int *) arg);
|
|
|
case TIOCSERSWILD:
|
case TIOCSERSWILD:
|
if (!suser())
|
if (!suser())
|
return -EPERM;
|
return -EPERM;
|
error = verify_area(VERIFY_READ, (void *) arg,sizeof(long));
|
error = verify_area(VERIFY_READ, (void *) arg,sizeof(long));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
rs_wild_int_mask = get_fs_long((unsigned long *) arg);
|
rs_wild_int_mask = get_fs_long((unsigned long *) arg);
|
if (rs_wild_int_mask < 0)
|
if (rs_wild_int_mask < 0)
|
rs_wild_int_mask = check_wild_interrupts(0);
|
rs_wild_int_mask = check_wild_interrupts(0);
|
return 0;
|
return 0;
|
|
|
case TIOCSERGSTRUCT:
|
case TIOCSERGSTRUCT:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct async_struct));
|
sizeof(struct async_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
memcpy_tofs((struct async_struct *) arg,
|
memcpy_tofs((struct async_struct *) arg,
|
info, sizeof(struct async_struct));
|
info, sizeof(struct async_struct));
|
return 0;
|
return 0;
|
|
|
case TIOCSERGETMULTI:
|
case TIOCSERGETMULTI:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct serial_multiport_struct));
|
sizeof(struct serial_multiport_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return get_multiport_struct(info,
|
return get_multiport_struct(info,
|
(struct serial_multiport_struct *) arg);
|
(struct serial_multiport_struct *) arg);
|
case TIOCSERSETMULTI:
|
case TIOCSERSETMULTI:
|
error = verify_area(VERIFY_READ, (void *) arg,
|
error = verify_area(VERIFY_READ, (void *) arg,
|
sizeof(struct serial_multiport_struct));
|
sizeof(struct serial_multiport_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return set_multiport_struct(info,
|
return set_multiport_struct(info,
|
(struct serial_multiport_struct *) arg);
|
(struct serial_multiport_struct *) arg);
|
/*
|
/*
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
* - mask passed in arg for lines of interest
|
* - mask passed in arg for lines of interest
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
* Caller should use TIOCGICOUNT to see which one it was
|
* Caller should use TIOCGICOUNT to see which one it was
|
*/
|
*/
|
case TIOCMIWAIT:
|
case TIOCMIWAIT:
|
cli();
|
cli();
|
cprev = info->icount; /* note the counters on entry */
|
cprev = info->icount; /* note the counters on entry */
|
sti();
|
sti();
|
while (1) {
|
while (1) {
|
interruptible_sleep_on(&info->delta_msr_wait);
|
interruptible_sleep_on(&info->delta_msr_wait);
|
/* see if a signal did it */
|
/* see if a signal did it */
|
if (current->signal & ~current->blocked)
|
if (current->signal & ~current->blocked)
|
return -ERESTARTSYS;
|
return -ERESTARTSYS;
|
cli();
|
cli();
|
cnow = info->icount; /* atomic copy */
|
cnow = info->icount; /* atomic copy */
|
sti();
|
sti();
|
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
|
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
|
cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
|
cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
|
return -EIO; /* no change => error */
|
return -EIO; /* no change => error */
|
if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
|
if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
|
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
|
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
|
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
|
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
|
return 0;
|
return 0;
|
}
|
}
|
cprev = cnow;
|
cprev = cnow;
|
}
|
}
|
/* NOTREACHED */
|
/* NOTREACHED */
|
|
|
/*
|
/*
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
* Return: write counters to the user passed counter struct
|
* Return: write counters to the user passed counter struct
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
* RI where only 0->1 is counted.
|
* RI where only 0->1 is counted.
|
*/
|
*/
|
case TIOCGICOUNT:
|
case TIOCGICOUNT:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct serial_icounter_struct));
|
sizeof(struct serial_icounter_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
cli();
|
cli();
|
cnow = info->icount;
|
cnow = info->icount;
|
sti();
|
sti();
|
p_cuser = (struct serial_icounter_struct *) arg;
|
p_cuser = (struct serial_icounter_struct *) arg;
|
put_user(cnow.cts, &p_cuser->cts);
|
put_user(cnow.cts, &p_cuser->cts);
|
put_user(cnow.dsr, &p_cuser->dsr);
|
put_user(cnow.dsr, &p_cuser->dsr);
|
put_user(cnow.rng, &p_cuser->rng);
|
put_user(cnow.rng, &p_cuser->rng);
|
put_user(cnow.dcd, &p_cuser->dcd);
|
put_user(cnow.dcd, &p_cuser->dcd);
|
return 0;
|
return 0;
|
|
|
default:
|
default:
|
return -ENOIOCTLCMD;
|
return -ENOIOCTLCMD;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
{
|
{
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
struct async_struct *info = (struct async_struct *)tty->driver_data;
|
|
|
if ( (tty->termios->c_cflag == old_termios->c_cflag)
|
if ( (tty->termios->c_cflag == old_termios->c_cflag)
|
&& ( RELEVANT_IFLAG(tty->termios->c_iflag)
|
&& ( RELEVANT_IFLAG(tty->termios->c_iflag)
|
== RELEVANT_IFLAG(old_termios->c_iflag)))
|
== RELEVANT_IFLAG(old_termios->c_iflag)))
|
return;
|
return;
|
|
|
change_speed(info);
|
change_speed(info);
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
tty->hw_stopped = 0;
|
tty->hw_stopped = 0;
|
rs_start(tty);
|
rs_start(tty);
|
}
|
}
|
|
|
#if 0
|
#if 0
|
/*
|
/*
|
* No need to wake up processes in open wait, since they
|
* No need to wake up processes in open wait, since they
|
* sample the CLOCAL flag once, and don't recheck it.
|
* sample the CLOCAL flag once, and don't recheck it.
|
* XXX It's not clear whether the current behavior is correct
|
* XXX It's not clear whether the current behavior is correct
|
* or not. Hence, this may change.....
|
* or not. Hence, this may change.....
|
*/
|
*/
|
if (!(old_termios->c_cflag & CLOCAL) &&
|
if (!(old_termios->c_cflag & CLOCAL) &&
|
(tty->termios->c_cflag & CLOCAL))
|
(tty->termios->c_cflag & CLOCAL))
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_close()
|
* rs_close()
|
*
|
*
|
* This routine is called when the serial port gets closed. First, we
|
* 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
|
* wait for the last remaining data to be sent. Then, we unlink its
|
* async structure from the interrupt chain if necessary, and we free
|
* async structure from the interrupt chain if necessary, and we free
|
* that IRQ if nothing is left in the chain.
|
* that IRQ if nothing is left in the chain.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static void rs_close(struct tty_struct *tty, struct file * filp)
|
static void rs_close(struct tty_struct *tty, struct file * filp)
|
{
|
{
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
unsigned long timeout;
|
unsigned long timeout;
|
|
|
if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
|
if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
|
|
if (tty_hung_up_p(filp)) {
|
if (tty_hung_up_p(filp)) {
|
DBG_CNT("before DEC-hung");
|
DBG_CNT("before DEC-hung");
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_close ttys%d, count = %d\n", info->line, info->count);
|
printk("rs_close ttys%d, count = %d\n", info->line, info->count);
|
#endif
|
#endif
|
if ((tty->count == 1) && (info->count != 1)) {
|
if ((tty->count == 1) && (info->count != 1)) {
|
/*
|
/*
|
* Uh, oh. tty->count is 1, which means that the tty
|
* Uh, oh. tty->count is 1, which means that the tty
|
* structure will be freed. Info->count should always
|
* structure will be freed. Info->count should always
|
* be one in these conditions. If it's greater than
|
* be one in these conditions. If it's greater than
|
* one, we've got real problems, since it means the
|
* one, we've got real problems, since it means the
|
* serial port won't be shutdown.
|
* serial port won't be shutdown.
|
*/
|
*/
|
printk("rs_close: bad serial port count; tty->count is 1, "
|
printk("rs_close: bad serial port count; tty->count is 1, "
|
"info->count is %d\n", info->count);
|
"info->count is %d\n", info->count);
|
info->count = 1;
|
info->count = 1;
|
}
|
}
|
if (--info->count < 0) {
|
if (--info->count < 0) {
|
printk("rs_close: bad serial port count for ttys%d: %d\n",
|
printk("rs_close: bad serial port count for ttys%d: %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
info->count = 0;
|
info->count = 0;
|
}
|
}
|
if (info->count) {
|
if (info->count) {
|
DBG_CNT("before DEC-2");
|
DBG_CNT("before DEC-2");
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
info->flags |= ASYNC_CLOSING;
|
info->flags |= ASYNC_CLOSING;
|
/*
|
/*
|
* Save the termios structure, since this port may have
|
* Save the termios structure, since this port may have
|
* separate termios for callout and dialin.
|
* separate termios for callout and dialin.
|
*/
|
*/
|
if (info->flags & ASYNC_NORMAL_ACTIVE)
|
if (info->flags & ASYNC_NORMAL_ACTIVE)
|
info->normal_termios = *tty->termios;
|
info->normal_termios = *tty->termios;
|
if (info->flags & ASYNC_CALLOUT_ACTIVE)
|
if (info->flags & ASYNC_CALLOUT_ACTIVE)
|
info->callout_termios = *tty->termios;
|
info->callout_termios = *tty->termios;
|
/*
|
/*
|
* Now we wait for the transmit buffer to clear; and we notify
|
* Now we wait for the transmit buffer to clear; and we notify
|
* the line discipline to only process XON/XOFF characters.
|
* the line discipline to only process XON/XOFF characters.
|
*/
|
*/
|
tty->closing = 1;
|
tty->closing = 1;
|
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
tty_wait_until_sent(tty, info->closing_wait);
|
tty_wait_until_sent(tty, info->closing_wait);
|
/*
|
/*
|
* At this point we stop accepting input. To do this, we
|
* At this point we stop accepting input. To do this, we
|
* disable the receive line status interrupts, and tell the
|
* disable the receive line status interrupts, and tell the
|
* interrupt driver to stop checking the data ready bit in the
|
* interrupt driver to stop checking the data ready bit in the
|
* line status register.
|
* line status register.
|
*/
|
*/
|
info->IER &= ~UART_IER_RLSI;
|
info->IER &= ~UART_IER_RLSI;
|
info->read_status_mask &= ~UART_LSR_DR;
|
info->read_status_mask &= ~UART_LSR_DR;
|
if (info->flags & ASYNC_INITIALIZED) {
|
if (info->flags & ASYNC_INITIALIZED) {
|
serial_out(info, UART_IER, info->IER);
|
serial_out(info, UART_IER, info->IER);
|
/*
|
/*
|
* Before we drop DTR, make sure the UART transmitter
|
* Before we drop DTR, make sure the UART transmitter
|
* has completely drained; this is especially
|
* has completely drained; this is especially
|
* important if there is a transmit FIFO!
|
* important if there is a transmit FIFO!
|
*/
|
*/
|
timeout = jiffies+HZ;
|
timeout = jiffies+HZ;
|
while (!(serial_inp(info, UART_LSR) & UART_LSR_TEMT)) {
|
while (!(serial_inp(info, UART_LSR) & UART_LSR_TEMT)) {
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + info->timeout;
|
current->timeout = jiffies + info->timeout;
|
schedule();
|
schedule();
|
if (jiffies > timeout)
|
if (jiffies > timeout)
|
break;
|
break;
|
}
|
}
|
}
|
}
|
shutdown(info);
|
shutdown(info);
|
if (tty->driver.flush_buffer)
|
if (tty->driver.flush_buffer)
|
tty->driver.flush_buffer(tty);
|
tty->driver.flush_buffer(tty);
|
if (tty->ldisc.flush_buffer)
|
if (tty->ldisc.flush_buffer)
|
tty->ldisc.flush_buffer(tty);
|
tty->ldisc.flush_buffer(tty);
|
tty->closing = 0;
|
tty->closing = 0;
|
info->event = 0;
|
info->event = 0;
|
info->tty = 0;
|
info->tty = 0;
|
if (info->blocked_open) {
|
if (info->blocked_open) {
|
if (info->close_delay) {
|
if (info->close_delay) {
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + info->close_delay;
|
current->timeout = jiffies + info->close_delay;
|
schedule();
|
schedule();
|
}
|
}
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
}
|
}
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
|
ASYNC_CLOSING);
|
ASYNC_CLOSING);
|
wake_up_interruptible(&info->close_wait);
|
wake_up_interruptible(&info->close_wait);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/*
|
/*
|
* rs_hangup() --- called by tty_hangup() when a hangup is signaled.
|
* rs_hangup() --- called by tty_hangup() when a hangup is signaled.
|
*/
|
*/
|
void rs_hangup(struct tty_struct *tty)
|
void rs_hangup(struct tty_struct *tty)
|
{
|
{
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
struct async_struct * info = (struct async_struct *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_hangup"))
|
if (serial_paranoia_check(info, tty->device, "rs_hangup"))
|
return;
|
return;
|
|
|
rs_flush_buffer(tty);
|
rs_flush_buffer(tty);
|
shutdown(info);
|
shutdown(info);
|
info->event = 0;
|
info->event = 0;
|
info->count = 0;
|
info->count = 0;
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
|
info->tty = 0;
|
info->tty = 0;
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_open() and friends
|
* rs_open() and friends
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static int block_til_ready(struct tty_struct *tty, struct file * filp,
|
static int block_til_ready(struct tty_struct *tty, struct file * filp,
|
struct async_struct *info)
|
struct async_struct *info)
|
{
|
{
|
struct wait_queue wait = { current, NULL };
|
struct wait_queue wait = { current, NULL };
|
int retval;
|
int retval;
|
int do_clocal = 0;
|
int do_clocal = 0;
|
|
|
/*
|
/*
|
* If the device is in the middle of being closed, then block
|
* If the device is in the middle of being closed, then block
|
* until it's done, and then try again.
|
* until it's done, and then try again.
|
*/
|
*/
|
if (tty_hung_up_p(filp) ||
|
if (tty_hung_up_p(filp) ||
|
(info->flags & ASYNC_CLOSING)) {
|
(info->flags & ASYNC_CLOSING)) {
|
if (info->flags & ASYNC_CLOSING)
|
if (info->flags & ASYNC_CLOSING)
|
interruptible_sleep_on(&info->close_wait);
|
interruptible_sleep_on(&info->close_wait);
|
#ifdef SERIAL_DO_RESTART
|
#ifdef SERIAL_DO_RESTART
|
if (info->flags & ASYNC_HUP_NOTIFY)
|
if (info->flags & ASYNC_HUP_NOTIFY)
|
return -EAGAIN;
|
return -EAGAIN;
|
else
|
else
|
return -ERESTARTSYS;
|
return -ERESTARTSYS;
|
#else
|
#else
|
return -EAGAIN;
|
return -EAGAIN;
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* If this is a callout device, then just make sure the normal
|
* If this is a callout device, then just make sure the normal
|
* device isn't being used.
|
* device isn't being used.
|
*/
|
*/
|
if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
|
if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
|
if (info->flags & ASYNC_NORMAL_ACTIVE)
|
if (info->flags & ASYNC_NORMAL_ACTIVE)
|
return -EBUSY;
|
return -EBUSY;
|
if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
(info->flags & ASYNC_SESSION_LOCKOUT) &&
|
(info->flags & ASYNC_SESSION_LOCKOUT) &&
|
(info->session != current->session))
|
(info->session != current->session))
|
return -EBUSY;
|
return -EBUSY;
|
if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
(info->flags & ASYNC_PGRP_LOCKOUT) &&
|
(info->flags & ASYNC_PGRP_LOCKOUT) &&
|
(info->pgrp != current->pgrp))
|
(info->pgrp != current->pgrp))
|
return -EBUSY;
|
return -EBUSY;
|
info->flags |= ASYNC_CALLOUT_ACTIVE;
|
info->flags |= ASYNC_CALLOUT_ACTIVE;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* If non-blocking mode is set, or the port is not enabled,
|
* If non-blocking mode is set, or the port is not enabled,
|
* then make the check up front and then exit.
|
* then make the check up front and then exit.
|
*/
|
*/
|
if ((filp->f_flags & O_NONBLOCK) ||
|
if ((filp->f_flags & O_NONBLOCK) ||
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
if (info->flags & ASYNC_CALLOUT_ACTIVE)
|
if (info->flags & ASYNC_CALLOUT_ACTIVE)
|
return -EBUSY;
|
return -EBUSY;
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (info->flags & ASYNC_CALLOUT_ACTIVE) {
|
if (info->flags & ASYNC_CALLOUT_ACTIVE) {
|
if (info->normal_termios.c_cflag & CLOCAL)
|
if (info->normal_termios.c_cflag & CLOCAL)
|
do_clocal = 1;
|
do_clocal = 1;
|
} else {
|
} else {
|
if (tty->termios->c_cflag & CLOCAL)
|
if (tty->termios->c_cflag & CLOCAL)
|
do_clocal = 1;
|
do_clocal = 1;
|
}
|
}
|
|
|
/*
|
/*
|
* Block waiting for the carrier detect and the line to become
|
* Block waiting for the carrier detect and the line to become
|
* free (i.e., not in use by the callout). While we are in
|
* free (i.e., not in use by the callout). While we are in
|
* this loop, info->count is dropped by one, so that
|
* this loop, info->count is dropped by one, so that
|
* rs_close() knows when to free things. We restore it upon
|
* rs_close() knows when to free things. We restore it upon
|
* exit, either normal or abnormal.
|
* exit, either normal or abnormal.
|
*/
|
*/
|
retval = 0;
|
retval = 0;
|
add_wait_queue(&info->open_wait, &wait);
|
add_wait_queue(&info->open_wait, &wait);
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready before block: ttys%d, count = %d\n",
|
printk("block_til_ready before block: ttys%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
cli();
|
cli();
|
if (!tty_hung_up_p(filp))
|
if (!tty_hung_up_p(filp))
|
info->count--;
|
info->count--;
|
sti();
|
sti();
|
info->blocked_open++;
|
info->blocked_open++;
|
while (1) {
|
while (1) {
|
cli();
|
cli();
|
if (!(info->flags & ASYNC_CALLOUT_ACTIVE))
|
if (!(info->flags & ASYNC_CALLOUT_ACTIVE))
|
serial_out(info, UART_MCR,
|
serial_out(info, UART_MCR,
|
serial_inp(info, UART_MCR) |
|
serial_inp(info, UART_MCR) |
|
(UART_MCR_DTR | UART_MCR_RTS));
|
(UART_MCR_DTR | UART_MCR_RTS));
|
sti();
|
sti();
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
if (tty_hung_up_p(filp) ||
|
if (tty_hung_up_p(filp) ||
|
!(info->flags & ASYNC_INITIALIZED)) {
|
!(info->flags & ASYNC_INITIALIZED)) {
|
#ifdef SERIAL_DO_RESTART
|
#ifdef SERIAL_DO_RESTART
|
if (info->flags & ASYNC_HUP_NOTIFY)
|
if (info->flags & ASYNC_HUP_NOTIFY)
|
retval = -EAGAIN;
|
retval = -EAGAIN;
|
else
|
else
|
retval = -ERESTARTSYS;
|
retval = -ERESTARTSYS;
|
#else
|
#else
|
retval = -EAGAIN;
|
retval = -EAGAIN;
|
#endif
|
#endif
|
break;
|
break;
|
}
|
}
|
if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
|
!(info->flags & ASYNC_CLOSING) &&
|
!(info->flags & ASYNC_CLOSING) &&
|
(do_clocal || (serial_in(info, UART_MSR) &
|
(do_clocal || (serial_in(info, UART_MSR) &
|
UART_MSR_DCD)))
|
UART_MSR_DCD)))
|
break;
|
break;
|
if (current->signal & ~current->blocked) {
|
if (current->signal & ~current->blocked) {
|
retval = -ERESTARTSYS;
|
retval = -ERESTARTSYS;
|
break;
|
break;
|
}
|
}
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready blocking: ttys%d, count = %d\n",
|
printk("block_til_ready blocking: ttys%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
schedule();
|
schedule();
|
}
|
}
|
current->state = TASK_RUNNING;
|
current->state = TASK_RUNNING;
|
remove_wait_queue(&info->open_wait, &wait);
|
remove_wait_queue(&info->open_wait, &wait);
|
if (!tty_hung_up_p(filp))
|
if (!tty_hung_up_p(filp))
|
info->count++;
|
info->count++;
|
info->blocked_open--;
|
info->blocked_open--;
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready after blocking: ttys%d, count = %d\n",
|
printk("block_til_ready after blocking: ttys%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called whenever a serial port is opened. It
|
* This routine is called whenever a serial port is opened. It
|
* enables interrupts for a serial port, linking in its async structure into
|
* enables interrupts for a serial port, linking in its async structure into
|
* the IRQ chain. It also performs the serial-specific
|
* the IRQ chain. It also performs the serial-specific
|
* initialization for the tty structure.
|
* initialization for the tty structure.
|
*/
|
*/
|
int rs_open(struct tty_struct *tty, struct file * filp)
|
int rs_open(struct tty_struct *tty, struct file * filp)
|
{
|
{
|
struct async_struct *info;
|
struct async_struct *info;
|
int retval, line;
|
int retval, line;
|
unsigned long page;
|
unsigned long page;
|
|
|
line = MINOR(tty->device) - tty->driver.minor_start;
|
line = MINOR(tty->device) - tty->driver.minor_start;
|
if ((line < 0) || (line >= NR_PORTS))
|
if ((line < 0) || (line >= NR_PORTS))
|
return -ENODEV;
|
return -ENODEV;
|
info = rs_table + line;
|
info = rs_table + line;
|
if (serial_paranoia_check(info, tty->device, "rs_open"))
|
if (serial_paranoia_check(info, tty->device, "rs_open"))
|
return -ENODEV;
|
return -ENODEV;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
|
printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
|
info->count);
|
info->count);
|
#endif
|
#endif
|
info->count++;
|
info->count++;
|
tty->driver_data = info;
|
tty->driver_data = info;
|
info->tty = tty;
|
info->tty = tty;
|
|
|
if (!tmp_buf) {
|
if (!tmp_buf) {
|
page = get_free_page(GFP_KERNEL);
|
page = get_free_page(GFP_KERNEL);
|
if (!page)
|
if (!page)
|
return -ENOMEM;
|
return -ENOMEM;
|
if (tmp_buf)
|
if (tmp_buf)
|
free_page(page);
|
free_page(page);
|
else
|
else
|
tmp_buf = (unsigned char *) page;
|
tmp_buf = (unsigned char *) page;
|
}
|
}
|
|
|
/*
|
/*
|
* Start up serial port
|
* Start up serial port
|
*/
|
*/
|
retval = startup(info);
|
retval = startup(info);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
retval = block_til_ready(tty, filp, info);
|
retval = block_til_ready(tty, filp, info);
|
if (retval) {
|
if (retval) {
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open returning after block_til_ready with %d\n",
|
printk("rs_open returning after block_til_ready with %d\n",
|
retval);
|
retval);
|
#endif
|
#endif
|
return retval;
|
return retval;
|
}
|
}
|
|
|
if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
|
if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
|
if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
|
if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
|
*tty->termios = info->normal_termios;
|
*tty->termios = info->normal_termios;
|
else
|
else
|
*tty->termios = info->callout_termios;
|
*tty->termios = info->callout_termios;
|
change_speed(info);
|
change_speed(info);
|
}
|
}
|
|
|
info->session = current->session;
|
info->session = current->session;
|
info->pgrp = current->pgrp;
|
info->pgrp = current->pgrp;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open ttys%d successful...", info->line);
|
printk("rs_open ttys%d successful...", info->line);
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* ---------------------------------------------------------------------
|
* ---------------------------------------------------------------------
|
* rs_init() and friends
|
* rs_init() and friends
|
*
|
*
|
* rs_init() is called at boot-time to initialize the serial driver.
|
* rs_init() is called at boot-time to initialize the serial driver.
|
* ---------------------------------------------------------------------
|
* ---------------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* This routine prints out the appropriate serial driver version
|
* This routine prints out the appropriate serial driver version
|
* number, and identifies which options were configured into this
|
* number, and identifies which options were configured into this
|
* driver.
|
* driver.
|
*/
|
*/
|
static void show_serial_version(void)
|
static void show_serial_version(void)
|
{
|
{
|
printk(KERN_INFO "%s version %s with", serial_name, serial_version);
|
printk(KERN_INFO "%s version %s with", serial_name, serial_version);
|
#ifdef CONFIG_HUB6
|
#ifdef CONFIG_HUB6
|
printk(" HUB-6");
|
printk(" HUB-6");
|
#define SERIAL_OPT
|
#define SERIAL_OPT
|
#endif
|
#endif
|
#ifdef SERIAL_OPT
|
#ifdef SERIAL_OPT
|
printk(" enabled\n");
|
printk(" enabled\n");
|
#else
|
#else
|
printk(" no serial options enabled\n");
|
printk(" no serial options enabled\n");
|
#endif
|
#endif
|
#undef SERIAL_OPT
|
#undef SERIAL_OPT
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called by do_auto_irq(); it attempts to determine
|
* This routine is called by do_auto_irq(); it attempts to determine
|
* which interrupt a serial port is configured to use. It is not
|
* which interrupt a serial port is configured to use. It is not
|
* fool-proof, but it works a large part of the time.
|
* fool-proof, but it works a large part of the time.
|
*/
|
*/
|
static int get_auto_irq(struct async_struct *info)
|
static int get_auto_irq(struct async_struct *info)
|
{
|
{
|
unsigned char save_MCR, save_IER, save_ICP=0;
|
unsigned char save_MCR, save_IER, save_ICP=0;
|
unsigned short ICP=0, port = info->port;
|
unsigned short ICP=0, port = info->port;
|
unsigned long timeout;
|
unsigned long timeout;
|
|
|
/*
|
/*
|
* Enable interrupts and see who answers
|
* Enable interrupts and see who answers
|
*/
|
*/
|
rs_irq_triggered = 0;
|
rs_irq_triggered = 0;
|
cli();
|
cli();
|
save_IER = serial_inp(info, UART_IER);
|
save_IER = serial_inp(info, UART_IER);
|
save_MCR = serial_inp(info, UART_MCR);
|
save_MCR = serial_inp(info, UART_MCR);
|
if (info->flags & ASYNC_FOURPORT) {
|
if (info->flags & ASYNC_FOURPORT) {
|
serial_outp(info, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
|
serial_outp(info, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
|
serial_outp(info, UART_IER, 0x0f); /* enable all intrs */
|
serial_outp(info, UART_IER, 0x0f); /* enable all intrs */
|
ICP = (port & 0xFE0) | 0x01F;
|
ICP = (port & 0xFE0) | 0x01F;
|
save_ICP = inb_p(ICP);
|
save_ICP = inb_p(ICP);
|
outb_p(0x80, ICP);
|
outb_p(0x80, ICP);
|
(void) inb_p(ICP);
|
(void) inb_p(ICP);
|
} else {
|
} else {
|
serial_outp(info, UART_MCR,
|
serial_outp(info, UART_MCR,
|
UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
|
UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
|
serial_outp(info, UART_IER, 0x0f); /* enable all intrs */
|
serial_outp(info, UART_IER, 0x0f); /* enable all intrs */
|
}
|
}
|
sti();
|
sti();
|
/*
|
/*
|
* Next, clear the interrupt registers.
|
* Next, clear the interrupt registers.
|
*/
|
*/
|
(void)serial_inp(info, UART_LSR);
|
(void)serial_inp(info, UART_LSR);
|
(void)serial_inp(info, UART_RX);
|
(void)serial_inp(info, UART_RX);
|
(void)serial_inp(info, UART_IIR);
|
(void)serial_inp(info, UART_IIR);
|
(void)serial_inp(info, UART_MSR);
|
(void)serial_inp(info, UART_MSR);
|
|
|
timeout = jiffies+2*HZ/100;
|
timeout = jiffies+2*HZ/100;
|
while (timeout >= jiffies) {
|
while (timeout >= jiffies) {
|
if (rs_irq_triggered)
|
if (rs_irq_triggered)
|
break;
|
break;
|
}
|
}
|
/*
|
/*
|
* Now check to see if we got any business, and clean up.
|
* Now check to see if we got any business, and clean up.
|
*/
|
*/
|
cli();
|
cli();
|
serial_outp(info, UART_IER, save_IER);
|
serial_outp(info, UART_IER, save_IER);
|
serial_outp(info, UART_MCR, save_MCR);
|
serial_outp(info, UART_MCR, save_MCR);
|
if (info->flags & ASYNC_FOURPORT)
|
if (info->flags & ASYNC_FOURPORT)
|
outb_p(save_ICP, ICP);
|
outb_p(save_ICP, ICP);
|
sti();
|
sti();
|
return(rs_irq_triggered);
|
return(rs_irq_triggered);
|
}
|
}
|
|
|
/*
|
/*
|
* Calls get_auto_irq() multiple times, to make sure we don't get
|
* Calls get_auto_irq() multiple times, to make sure we don't get
|
* faked out by random interrupts
|
* faked out by random interrupts
|
*/
|
*/
|
static int do_auto_irq(struct async_struct * info)
|
static int do_auto_irq(struct async_struct * info)
|
{
|
{
|
unsigned port = info->port;
|
unsigned port = info->port;
|
int irq_lines = 0;
|
int irq_lines = 0;
|
int irq_try_1 = 0, irq_try_2 = 0;
|
int irq_try_1 = 0, irq_try_2 = 0;
|
int retries;
|
int retries;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (!port)
|
if (!port)
|
return 0;
|
return 0;
|
|
|
/* Turn on interrupts (they may be off) */
|
/* Turn on interrupts (they may be off) */
|
save_flags(flags); sti();
|
save_flags(flags); sti();
|
|
|
irq_lines = grab_all_interrupts(rs_wild_int_mask);
|
irq_lines = grab_all_interrupts(rs_wild_int_mask);
|
|
|
for (retries = 0; retries < 5; retries++) {
|
for (retries = 0; retries < 5; retries++) {
|
if (!irq_try_1)
|
if (!irq_try_1)
|
irq_try_1 = get_auto_irq(info);
|
irq_try_1 = get_auto_irq(info);
|
if (!irq_try_2)
|
if (!irq_try_2)
|
irq_try_2 = get_auto_irq(info);
|
irq_try_2 = get_auto_irq(info);
|
if (irq_try_1 && irq_try_2) {
|
if (irq_try_1 && irq_try_2) {
|
if (irq_try_1 == irq_try_2)
|
if (irq_try_1 == irq_try_2)
|
break;
|
break;
|
irq_try_1 = irq_try_2 = 0;
|
irq_try_1 = irq_try_2 = 0;
|
}
|
}
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
free_all_interrupts(irq_lines);
|
free_all_interrupts(irq_lines);
|
return (irq_try_1 == irq_try_2) ? irq_try_1 : 0;
|
return (irq_try_1 == irq_try_2) ? irq_try_1 : 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called by rs_init() to initialize a specific serial
|
* This routine is called by rs_init() to initialize a specific serial
|
* port. It determines what type of UART chip this serial port is
|
* port. It determines what type of UART chip this serial port is
|
* using: 8250, 16450, 16550, 16550A. The important question is
|
* using: 8250, 16450, 16550, 16550A. The important question is
|
* whether or not this UART is a 16550A or not, since this will
|
* whether or not this UART is a 16550A or not, since this will
|
* determine whether or not we can use its FIFO features or not.
|
* determine whether or not we can use its FIFO features or not.
|
*/
|
*/
|
static void autoconfig(struct async_struct * info)
|
static void autoconfig(struct async_struct * info)
|
{
|
{
|
unsigned char status1, status2, scratch, scratch2;
|
unsigned char status1, status2, scratch, scratch2;
|
unsigned port = info->port;
|
unsigned port = info->port;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
info->type = PORT_UNKNOWN;
|
info->type = PORT_UNKNOWN;
|
|
|
if (!port)
|
if (!port)
|
return;
|
return;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
|
|
/*
|
/*
|
* Do a simple existence test first; if we fail this, there's
|
* Do a simple existence test first; if we fail this, there's
|
* no point trying anything else.
|
* no point trying anything else.
|
*
|
*
|
* 0x80 is used as a nonsense port to prevent against false
|
* 0x80 is used as a nonsense port to prevent against false
|
* positives due to ISA bus float. The assumption is that
|
* positives due to ISA bus float. The assumption is that
|
* 0x80 is a non-existent port; which should be safe since
|
* 0x80 is a non-existent port; which should be safe since
|
* include/asm/io.h also makes this assumption.
|
* include/asm/io.h also makes this assumption.
|
*/
|
*/
|
scratch = serial_inp(info, UART_IER);
|
scratch = serial_inp(info, UART_IER);
|
serial_outp(info, UART_IER, 0);
|
serial_outp(info, UART_IER, 0);
|
outb(0xff, 0x080);
|
outb(0xff, 0x080);
|
scratch2 = serial_inp(info, UART_IER);
|
scratch2 = serial_inp(info, UART_IER);
|
serial_outp(info, UART_IER, scratch);
|
serial_outp(info, UART_IER, scratch);
|
if (scratch2) {
|
if (scratch2) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return; /* We failed; there's nothing here */
|
return; /* We failed; there's nothing here */
|
}
|
}
|
|
|
/*
|
/*
|
* Check to see if a UART is really there. Certain broken
|
* Check to see if a UART is really there. Certain broken
|
* internal modems based on the Rockwell chipset fail this
|
* internal modems based on the Rockwell chipset fail this
|
* test, because they apparently don't implement the loopback
|
* test, because they apparently don't implement the loopback
|
* test mode. So this test is skipped on the COM 1 through
|
* test mode. So this test is skipped on the COM 1 through
|
* COM 4 ports. This *should* be safe, since no board
|
* COM 4 ports. This *should* be safe, since no board
|
* manufacturer would be stupid enough to design a board
|
* manufacturer would be stupid enough to design a board
|
* that conflicts with COM 1-4 --- we hope!
|
* that conflicts with COM 1-4 --- we hope!
|
*/
|
*/
|
if (!(info->flags & ASYNC_SKIP_TEST)) {
|
if (!(info->flags & ASYNC_SKIP_TEST)) {
|
scratch = serial_inp(info, UART_MCR);
|
scratch = serial_inp(info, UART_MCR);
|
serial_outp(info, UART_MCR, UART_MCR_LOOP | scratch);
|
serial_outp(info, UART_MCR, UART_MCR_LOOP | scratch);
|
scratch2 = serial_inp(info, UART_MSR);
|
scratch2 = serial_inp(info, UART_MSR);
|
serial_outp(info, UART_MCR, UART_MCR_LOOP | 0x0A);
|
serial_outp(info, UART_MCR, UART_MCR_LOOP | 0x0A);
|
status1 = serial_inp(info, UART_MSR) & 0xF0;
|
status1 = serial_inp(info, UART_MSR) & 0xF0;
|
serial_outp(info, UART_MCR, scratch);
|
serial_outp(info, UART_MCR, scratch);
|
serial_outp(info, UART_MSR, scratch2);
|
serial_outp(info, UART_MSR, scratch2);
|
if (status1 != 0x90) {
|
if (status1 != 0x90) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* If the AUTO_IRQ flag is set, try to do the automatic IRQ
|
* If the AUTO_IRQ flag is set, try to do the automatic IRQ
|
* detection.
|
* detection.
|
*/
|
*/
|
if (info->flags & ASYNC_AUTO_IRQ)
|
if (info->flags & ASYNC_AUTO_IRQ)
|
info->irq = do_auto_irq(info);
|
info->irq = do_auto_irq(info);
|
|
|
scratch2 = serial_in(info, UART_LCR);
|
scratch2 = serial_in(info, UART_LCR);
|
serial_outp(info, UART_LCR, scratch2 | UART_LCR_DLAB);
|
serial_outp(info, UART_LCR, scratch2 | UART_LCR_DLAB);
|
serial_outp(info, UART_EFR, 0); /* EFR is the same as FCR */
|
serial_outp(info, UART_EFR, 0); /* EFR is the same as FCR */
|
serial_outp(info, UART_LCR, scratch2);
|
serial_outp(info, UART_LCR, scratch2);
|
serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
|
serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
|
scratch = serial_in(info, UART_IIR) >> 6;
|
scratch = serial_in(info, UART_IIR) >> 6;
|
info->xmit_fifo_size = 1;
|
info->xmit_fifo_size = 1;
|
switch (scratch) {
|
switch (scratch) {
|
case 0:
|
case 0:
|
info->type = PORT_16450;
|
info->type = PORT_16450;
|
break;
|
break;
|
case 1:
|
case 1:
|
info->type = PORT_UNKNOWN;
|
info->type = PORT_UNKNOWN;
|
break;
|
break;
|
case 2:
|
case 2:
|
info->type = PORT_16550;
|
info->type = PORT_16550;
|
break;
|
break;
|
case 3:
|
case 3:
|
serial_outp(info, UART_LCR, scratch2 | UART_LCR_DLAB);
|
serial_outp(info, UART_LCR, scratch2 | UART_LCR_DLAB);
|
if (serial_in(info, UART_EFR) == 0) {
|
if (serial_in(info, UART_EFR) == 0) {
|
info->type = PORT_16650;
|
info->type = PORT_16650;
|
info->xmit_fifo_size = 32;
|
info->xmit_fifo_size = 32;
|
} else {
|
} else {
|
info->type = PORT_16550A;
|
info->type = PORT_16550A;
|
info->xmit_fifo_size = 16;
|
info->xmit_fifo_size = 16;
|
}
|
}
|
serial_outp(info, UART_LCR, scratch2);
|
serial_outp(info, UART_LCR, scratch2);
|
break;
|
break;
|
}
|
}
|
if (info->type == PORT_16450) {
|
if (info->type == PORT_16450) {
|
scratch = serial_in(info, UART_SCR);
|
scratch = serial_in(info, UART_SCR);
|
serial_outp(info, UART_SCR, 0xa5);
|
serial_outp(info, UART_SCR, 0xa5);
|
status1 = serial_in(info, UART_SCR);
|
status1 = serial_in(info, UART_SCR);
|
serial_outp(info, UART_SCR, 0x5a);
|
serial_outp(info, UART_SCR, 0x5a);
|
status2 = serial_in(info, UART_SCR);
|
status2 = serial_in(info, UART_SCR);
|
serial_outp(info, UART_SCR, scratch);
|
serial_outp(info, UART_SCR, scratch);
|
|
|
if ((status1 != 0xa5) || (status2 != 0x5a))
|
if ((status1 != 0xa5) || (status2 != 0x5a))
|
info->type = PORT_8250;
|
info->type = PORT_8250;
|
}
|
}
|
request_region(info->port,8,"serial(auto)");
|
request_region(info->port,8,"serial(auto)");
|
|
|
/*
|
/*
|
* Reset the UART.
|
* Reset the UART.
|
*/
|
*/
|
#if defined(__alpha__) && !defined(CONFIG_PCI)
|
#if defined(__alpha__) && !defined(CONFIG_PCI)
|
/*
|
/*
|
* I wonder what DEC did to the OUT1 and OUT2 lines?
|
* I wonder what DEC did to the OUT1 and OUT2 lines?
|
* clearing them results in endless interrupts.
|
* clearing them results in endless interrupts.
|
*/
|
*/
|
serial_outp(info, UART_MCR, 0x0c);
|
serial_outp(info, UART_MCR, 0x0c);
|
#else
|
#else
|
serial_outp(info, UART_MCR, 0x00);
|
serial_outp(info, UART_MCR, 0x00);
|
#endif
|
#endif
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
|
UART_FCR_CLEAR_XMIT));
|
UART_FCR_CLEAR_XMIT));
|
(void)serial_in(info, UART_RX);
|
(void)serial_in(info, UART_RX);
|
|
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
int register_serial(struct serial_struct *req);
|
int register_serial(struct serial_struct *req);
|
void unregister_serial(int line);
|
void unregister_serial(int line);
|
|
|
static struct symbol_table serial_syms = {
|
static struct symbol_table serial_syms = {
|
#include <linux/symtab_begin.h>
|
#include <linux/symtab_begin.h>
|
X(register_serial),
|
X(register_serial),
|
X(unregister_serial),
|
X(unregister_serial),
|
#include <linux/symtab_end.h>
|
#include <linux/symtab_end.h>
|
};
|
};
|
|
|
/*
|
/*
|
* The serial driver boot-time initialization code!
|
* The serial driver boot-time initialization code!
|
*/
|
*/
|
int rs_init(void)
|
int rs_init(void)
|
{
|
{
|
int i;
|
int i;
|
struct async_struct * info;
|
struct async_struct * info;
|
#ifdef CONFIG_ATOMWIDE_SERIAL
|
#ifdef CONFIG_ATOMWIDE_SERIAL
|
extern void atomwide_serial_init (void);
|
extern void atomwide_serial_init (void);
|
|
|
atomwide_serial_init ();
|
atomwide_serial_init ();
|
#endif
|
#endif
|
|
|
init_bh(SERIAL_BH, do_serial_bh);
|
init_bh(SERIAL_BH, do_serial_bh);
|
timer_table[RS_TIMER].fn = rs_timer;
|
timer_table[RS_TIMER].fn = rs_timer;
|
timer_table[RS_TIMER].expires = 0;
|
timer_table[RS_TIMER].expires = 0;
|
#ifdef CONFIG_AUTO_IRQ
|
#ifdef CONFIG_AUTO_IRQ
|
rs_wild_int_mask = check_wild_interrupts(1);
|
rs_wild_int_mask = check_wild_interrupts(1);
|
#endif
|
#endif
|
|
|
for (i = 0; i < 32; i++) {
|
for (i = 0; i < 32; i++) {
|
IRQ_ports[i] = 0;
|
IRQ_ports[i] = 0;
|
IRQ_timeout[i] = 0;
|
IRQ_timeout[i] = 0;
|
memset(&rs_multiport[i], 0, sizeof(struct rs_multiport_struct));
|
memset(&rs_multiport[i], 0, sizeof(struct rs_multiport_struct));
|
}
|
}
|
|
|
show_serial_version();
|
show_serial_version();
|
|
|
/* Initialize the tty_driver structure */
|
/* Initialize the tty_driver structure */
|
|
|
memset(&serial_driver, 0, sizeof(struct tty_driver));
|
memset(&serial_driver, 0, sizeof(struct tty_driver));
|
serial_driver.magic = TTY_DRIVER_MAGIC;
|
serial_driver.magic = TTY_DRIVER_MAGIC;
|
serial_driver.name = "ttyS";
|
serial_driver.name = "ttyS";
|
serial_driver.major = TTY_MAJOR;
|
serial_driver.major = TTY_MAJOR;
|
serial_driver.minor_start = 64;
|
serial_driver.minor_start = 64;
|
serial_driver.num = NR_PORTS;
|
serial_driver.num = NR_PORTS;
|
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
|
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
|
serial_driver.subtype = SERIAL_TYPE_NORMAL;
|
serial_driver.subtype = SERIAL_TYPE_NORMAL;
|
serial_driver.init_termios = tty_std_termios;
|
serial_driver.init_termios = tty_std_termios;
|
serial_driver.init_termios.c_cflag =
|
serial_driver.init_termios.c_cflag =
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
serial_driver.flags = TTY_DRIVER_REAL_RAW;
|
serial_driver.flags = TTY_DRIVER_REAL_RAW;
|
serial_driver.refcount = &serial_refcount;
|
serial_driver.refcount = &serial_refcount;
|
serial_driver.table = serial_table;
|
serial_driver.table = serial_table;
|
serial_driver.termios = serial_termios;
|
serial_driver.termios = serial_termios;
|
serial_driver.termios_locked = serial_termios_locked;
|
serial_driver.termios_locked = serial_termios_locked;
|
|
|
serial_driver.open = rs_open;
|
serial_driver.open = rs_open;
|
serial_driver.close = rs_close;
|
serial_driver.close = rs_close;
|
serial_driver.write = rs_write;
|
serial_driver.write = rs_write;
|
serial_driver.put_char = rs_put_char;
|
serial_driver.put_char = rs_put_char;
|
serial_driver.flush_chars = rs_flush_chars;
|
serial_driver.flush_chars = rs_flush_chars;
|
serial_driver.write_room = rs_write_room;
|
serial_driver.write_room = rs_write_room;
|
serial_driver.chars_in_buffer = rs_chars_in_buffer;
|
serial_driver.chars_in_buffer = rs_chars_in_buffer;
|
serial_driver.flush_buffer = rs_flush_buffer;
|
serial_driver.flush_buffer = rs_flush_buffer;
|
serial_driver.ioctl = rs_ioctl;
|
serial_driver.ioctl = rs_ioctl;
|
serial_driver.throttle = rs_throttle;
|
serial_driver.throttle = rs_throttle;
|
serial_driver.unthrottle = rs_unthrottle;
|
serial_driver.unthrottle = rs_unthrottle;
|
serial_driver.set_termios = rs_set_termios;
|
serial_driver.set_termios = rs_set_termios;
|
serial_driver.stop = rs_stop;
|
serial_driver.stop = rs_stop;
|
serial_driver.start = rs_start;
|
serial_driver.start = rs_start;
|
serial_driver.hangup = rs_hangup;
|
serial_driver.hangup = rs_hangup;
|
|
|
/*
|
/*
|
* The callout device is just like normal device except for
|
* The callout device is just like normal device except for
|
* major number and the subtype code.
|
* major number and the subtype code.
|
*/
|
*/
|
callout_driver = serial_driver;
|
callout_driver = serial_driver;
|
callout_driver.name = "cua";
|
callout_driver.name = "cua";
|
callout_driver.major = TTYAUX_MAJOR;
|
callout_driver.major = TTYAUX_MAJOR;
|
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
|
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
|
|
|
if (tty_register_driver(&serial_driver))
|
if (tty_register_driver(&serial_driver))
|
panic("Couldn't register serial driver\n");
|
panic("Couldn't register serial driver\n");
|
if (tty_register_driver(&callout_driver))
|
if (tty_register_driver(&callout_driver))
|
panic("Couldn't register callout driver\n");
|
panic("Couldn't register callout driver\n");
|
|
|
for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
|
for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
|
info->magic = SERIAL_MAGIC;
|
info->magic = SERIAL_MAGIC;
|
info->line = i;
|
info->line = i;
|
info->tty = 0;
|
info->tty = 0;
|
info->type = PORT_UNKNOWN;
|
info->type = PORT_UNKNOWN;
|
info->custom_divisor = 0;
|
info->custom_divisor = 0;
|
info->close_delay = 5*HZ/10;
|
info->close_delay = 5*HZ/10;
|
info->closing_wait = 30*HZ;
|
info->closing_wait = 30*HZ;
|
info->x_char = 0;
|
info->x_char = 0;
|
info->event = 0;
|
info->event = 0;
|
info->count = 0;
|
info->count = 0;
|
info->blocked_open = 0;
|
info->blocked_open = 0;
|
info->tqueue.routine = do_softint;
|
info->tqueue.routine = do_softint;
|
info->tqueue.data = info;
|
info->tqueue.data = info;
|
info->tqueue_hangup.routine = do_serial_hangup;
|
info->tqueue_hangup.routine = do_serial_hangup;
|
info->tqueue_hangup.data = info;
|
info->tqueue_hangup.data = info;
|
info->callout_termios =callout_driver.init_termios;
|
info->callout_termios =callout_driver.init_termios;
|
info->normal_termios = serial_driver.init_termios;
|
info->normal_termios = serial_driver.init_termios;
|
info->open_wait = 0;
|
info->open_wait = 0;
|
info->close_wait = 0;
|
info->close_wait = 0;
|
info->delta_msr_wait = 0;
|
info->delta_msr_wait = 0;
|
info->icount.cts = info->icount.dsr =
|
info->icount.cts = info->icount.dsr =
|
info->icount.rng = info->icount.dcd = 0;
|
info->icount.rng = info->icount.dcd = 0;
|
info->next_port = 0;
|
info->next_port = 0;
|
info->prev_port = 0;
|
info->prev_port = 0;
|
#if 0
|
#if 0
|
if (info->irq == 2)
|
if (info->irq == 2)
|
info->irq = 9;
|
info->irq = 9;
|
#endif
|
#endif
|
if (info->type == PORT_UNKNOWN) {
|
if (info->type == PORT_UNKNOWN) {
|
if (!(info->flags & ASYNC_BOOT_AUTOCONF))
|
if (!(info->flags & ASYNC_BOOT_AUTOCONF))
|
continue;
|
continue;
|
autoconfig(info);
|
autoconfig(info);
|
if (info->type == PORT_UNKNOWN)
|
if (info->type == PORT_UNKNOWN)
|
continue;
|
continue;
|
}
|
}
|
printk(KERN_INFO "tty%02d%s at 0x%04x (irq = %d)", info->line,
|
printk(KERN_INFO "tty%02d%s at 0x%04x (irq = %d)", info->line,
|
(info->flags & ASYNC_FOURPORT) ? " FourPort" : "",
|
(info->flags & ASYNC_FOURPORT) ? " FourPort" : "",
|
info->port, info->irq);
|
info->port, info->irq);
|
switch (info->type) {
|
switch (info->type) {
|
case PORT_8250:
|
case PORT_8250:
|
printk(" is a 8250\n");
|
printk(" is a 8250\n");
|
break;
|
break;
|
case PORT_16450:
|
case PORT_16450:
|
printk(" is a 16450\n");
|
printk(" is a 16450\n");
|
break;
|
break;
|
case PORT_16550:
|
case PORT_16550:
|
printk(" is a 16550\n");
|
printk(" is a 16550\n");
|
break;
|
break;
|
case PORT_16550A:
|
case PORT_16550A:
|
printk(" is a 16550A\n");
|
printk(" is a 16550A\n");
|
break;
|
break;
|
case PORT_16650:
|
case PORT_16650:
|
printk(" is a 16650\n");
|
printk(" is a 16650\n");
|
break;
|
break;
|
default:
|
default:
|
printk("\n");
|
printk("\n");
|
break;
|
break;
|
}
|
}
|
}
|
}
|
register_symtab(&serial_syms);
|
register_symtab(&serial_syms);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
int register_pre_init_serial (struct serial_struct *req)
|
int register_pre_init_serial (struct serial_struct *req)
|
{
|
{
|
int i;
|
int i;
|
struct async_struct *info;
|
struct async_struct *info;
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
for (i = 0; i < NR_PORTS; i++) {
|
if (rs_table[i].port == req->port)
|
if (rs_table[i].port == req->port)
|
break;
|
break;
|
}
|
}
|
|
|
if (i == NR_PORTS) {
|
if (i == NR_PORTS) {
|
for (i = 0; i < NR_PORTS; i++)
|
for (i = 0; i < NR_PORTS; i++)
|
if (!rs_table[i].port)
|
if (!rs_table[i].port)
|
break;
|
break;
|
}
|
}
|
if (i == NR_PORTS)
|
if (i == NR_PORTS)
|
return -1;
|
return -1;
|
|
|
info = &rs_table[i];
|
info = &rs_table[i];
|
if (info->count) {
|
if (info->count) {
|
printk ("Couldn't configure serial #%d (port=%d, irq=%d): "
|
printk ("Couldn't configure serial #%d (port=%d, irq=%d): "
|
"device already open\n", i, req->port, req->irq);
|
"device already open\n", i, req->port, req->irq);
|
return -1;
|
return -1;
|
}
|
}
|
info->irq = req->irq;
|
info->irq = req->irq;
|
info->port = req->port;
|
info->port = req->port;
|
info->baud_base = req->baud_base;
|
info->baud_base = req->baud_base;
|
serial_outp (info, UART_IER, 0);
|
serial_outp (info, UART_IER, 0);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* register_serial and unregister_serial allows for serial ports to be
|
* register_serial and unregister_serial allows for serial ports to be
|
* configured at run-time, to support PCMCIA modems.
|
* configured at run-time, to support PCMCIA modems.
|
*/
|
*/
|
int register_serial(struct serial_struct *req)
|
int register_serial(struct serial_struct *req)
|
{
|
{
|
int i;
|
int i;
|
unsigned long flags;
|
unsigned long flags;
|
struct async_struct *info;
|
struct async_struct *info;
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
for (i = 0; i < NR_PORTS; i++) {
|
for (i = 0; i < NR_PORTS; i++) {
|
if (rs_table[i].port == req->port)
|
if (rs_table[i].port == req->port)
|
break;
|
break;
|
}
|
}
|
if (i == NR_PORTS) {
|
if (i == NR_PORTS) {
|
for (i = 0; i < NR_PORTS; i++)
|
for (i = 0; i < NR_PORTS; i++)
|
if ((rs_table[i].type == PORT_UNKNOWN) &&
|
if ((rs_table[i].type == PORT_UNKNOWN) &&
|
(rs_table[i].count == 0))
|
(rs_table[i].count == 0))
|
break;
|
break;
|
}
|
}
|
if (i == NR_PORTS) {
|
if (i == NR_PORTS) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return -1;
|
return -1;
|
}
|
}
|
info = &rs_table[i];
|
info = &rs_table[i];
|
if (rs_table[i].count) {
|
if (rs_table[i].count) {
|
restore_flags(flags);
|
restore_flags(flags);
|
printk("Couldn't configure serial #%d (port=%d,irq=%d): "
|
printk("Couldn't configure serial #%d (port=%d,irq=%d): "
|
"device already open\n", i, req->port, req->irq);
|
"device already open\n", i, req->port, req->irq);
|
return -1;
|
return -1;
|
}
|
}
|
info->irq = req->irq;
|
info->irq = req->irq;
|
info->port = req->port;
|
info->port = req->port;
|
if (req->baud_base) /* rmk: need this to set the baud rate... */
|
if (req->baud_base) /* rmk: need this to set the baud rate... */
|
info->baud_base = req->baud_base;
|
info->baud_base = req->baud_base;
|
serial_outp(info, UART_IER, 0); /* rmk: need to make sure port is disabled */
|
serial_outp(info, UART_IER, 0); /* rmk: need to make sure port is disabled */
|
info->flags = req->flags;
|
info->flags = req->flags;
|
autoconfig(info);
|
autoconfig(info);
|
if (info->type == PORT_UNKNOWN) {
|
if (info->type == PORT_UNKNOWN) {
|
restore_flags(flags);
|
restore_flags(flags);
|
printk("register_serial(): autoconfig failed\n");
|
printk("register_serial(): autoconfig failed\n");
|
return -1;
|
return -1;
|
}
|
}
|
printk(KERN_INFO "tty%02d at 0x%04x (irq = %d)", info->line,
|
printk(KERN_INFO "tty%02d at 0x%04x (irq = %d)", info->line,
|
info->port, info->irq);
|
info->port, info->irq);
|
switch (info->type) {
|
switch (info->type) {
|
case PORT_8250:
|
case PORT_8250:
|
printk(" is a 8250\n"); break;
|
printk(" is a 8250\n"); break;
|
case PORT_16450:
|
case PORT_16450:
|
printk(" is a 16450\n"); break;
|
printk(" is a 16450\n"); break;
|
case PORT_16550:
|
case PORT_16550:
|
printk(" is a 16550\n"); break;
|
printk(" is a 16550\n"); break;
|
case PORT_16550A:
|
case PORT_16550A:
|
printk(" is a 16550A\n"); break;
|
printk(" is a 16550A\n"); break;
|
default:
|
default:
|
printk("\n"); break;
|
printk("\n"); break;
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
register_symtab(&serial_syms);
|
register_symtab(&serial_syms);
|
return info->line;
|
return info->line;
|
}
|
}
|
|
|
void unregister_serial(int line)
|
void unregister_serial(int line)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
struct async_struct *info = &rs_table[line];
|
struct async_struct *info = &rs_table[line];
|
|
|
save_flags_cli (flags);
|
save_flags_cli (flags);
|
if (info->tty)
|
if (info->tty)
|
tty_hangup(info->tty);
|
tty_hangup(info->tty);
|
info->type = PORT_UNKNOWN;
|
info->type = PORT_UNKNOWN;
|
release_region(info->port,8);
|
release_region(info->port,8);
|
printk(KERN_INFO "tty%02d unloaded\n", info->line);
|
printk(KERN_INFO "tty%02d unloaded\n", info->line);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
return rs_init();
|
return rs_init();
|
}
|
}
|
|
|
void cleanup_module(void)
|
void cleanup_module(void)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
int e1, e2;
|
int e1, e2;
|
int i;
|
int i;
|
|
|
/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
|
/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
|
save_flags_cli(flags);
|
save_flags_cli(flags);
|
timer_active &= ~(1 << RS_TIMER);
|
timer_active &= ~(1 << RS_TIMER);
|
timer_table[RS_TIMER].fn = NULL;
|
timer_table[RS_TIMER].fn = NULL;
|
timer_table[RS_TIMER].expires = 0;
|
timer_table[RS_TIMER].expires = 0;
|
if ((e1 = tty_unregister_driver(&serial_driver)))
|
if ((e1 = tty_unregister_driver(&serial_driver)))
|
printk("SERIAL: failed to unregister serial driver (%d)\n",
|
printk("SERIAL: failed to unregister serial driver (%d)\n",
|
e1);
|
e1);
|
if ((e2 = tty_unregister_driver(&callout_driver)))
|
if ((e2 = tty_unregister_driver(&callout_driver)))
|
printk("SERIAL: failed to unregister callout driver (%d)\n",
|
printk("SERIAL: failed to unregister callout driver (%d)\n",
|
e2);
|
e2);
|
restore_flags(flags);
|
restore_flags(flags);
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
for (i = 0; i < NR_PORTS; i++) {
|
if (rs_table[i].type != PORT_UNKNOWN)
|
if (rs_table[i].type != PORT_UNKNOWN)
|
release_region(rs_table[i].port, 8);
|
release_region(rs_table[i].port, 8);
|
}
|
}
|
if (tmp_buf) {
|
if (tmp_buf) {
|
free_page((unsigned long)tmp_buf);
|
free_page((unsigned long)tmp_buf);
|
tmp_buf = NULL;
|
tmp_buf = NULL;
|
}
|
}
|
}
|
}
|
#endif /* MODULE */
|
#endif /* MODULE */
|
|
|
