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-rw-r--r--arch/ia64/hp/sim/simserial.c705
1 files changed, 147 insertions, 558 deletions
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index bff0824..c34785d 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -4,16 +4,11 @@
* This driver is mostly used for bringup purposes and will go away.
* It has a strong dependency on the system console. All outputs
* are rerouted to the same facility as the one used by printk which, in our
- * case means sys_sim.c console (goes via the simulator). The code hereafter
- * is completely leveraged from the serial.c driver.
+ * case means sys_sim.c console (goes via the simulator).
*
* Copyright (C) 1999-2000, 2002-2003 Hewlett-Packard Co
* Stephane Eranian <eranian@hpl.hp.com>
* David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * 02/04/00 D. Mosberger Merged in serial.c bug fixes in rs_close().
- * 02/25/00 D. Mosberger Synced up with 2.3.99pre-5 version of serial.c.
- * 07/30/02 D. Mosberger Replace sti()/cli() with explicit spinlocks & local irq masking
*/
#include <linux/init.h>
@@ -27,15 +22,17 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/capability.h>
+#include <linux/circ_buf.h>
#include <linux/console.h>
+#include <linux/irq.h>
#include <linux/module.h>
#include <linux/serial.h>
-#include <linux/serialP.h>
#include <linux/sysrq.h>
+#include <linux/uaccess.h>
+
+#include <asm/hpsim.h>
-#include <asm/irq.h>
-#include <asm/hw_irq.h>
-#include <asm/uaccess.h>
+#include "hpsim_ssc.h"
#undef SIMSERIAL_DEBUG /* define this to get some debug information */
@@ -43,118 +40,44 @@
#define NR_PORTS 1 /* only one port for now */
-#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
-
-#define SSC_GETCHAR 21
-
-extern long ia64_ssc (long, long, long, long, int);
-extern void ia64_ssc_connect_irq (long intr, long irq);
-
-static char *serial_name = "SimSerial driver";
-static char *serial_version = "0.6";
-
-/*
- * This has been extracted from asm/serial.h. We need one eventually but
- * I don't know exactly what we're going to put in it so just fake one
- * for now.
- */
-#define BASE_BAUD ( 1843200 / 16 )
-
-#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
-
-/*
- * Most of the values here are meaningless to this particular driver.
- * However some values must be preserved for the code (leveraged from serial.c
- * to work correctly).
- * port must not be 0
- * type must not be UNKNOWN
- * So I picked arbitrary (guess from where?) values instead
- */
-static struct serial_state rs_table[NR_PORTS]={
- /* UART CLK PORT IRQ FLAGS */
- { 0, BASE_BAUD, 0x3F8, 0, STD_COM_FLAGS,0,PORT_16550 } /* ttyS0 */
+struct serial_state {
+ struct tty_port port;
+ struct circ_buf xmit;
+ int irq;
+ int x_char;
};
-/*
- * Just for the fun of it !
- */
-static struct serial_uart_config uart_config[] = {
- { "unknown", 1, 0 },
- { "8250", 1, 0 },
- { "16450", 1, 0 },
- { "16550", 1, 0 },
- { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
- { "cirrus", 1, 0 },
- { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH },
- { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO |
- UART_STARTECH },
- { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO},
- { NULL, 0}
-};
+static struct serial_state rs_table[NR_PORTS];
struct tty_driver *hp_simserial_driver;
-static struct async_struct *IRQ_ports[NR_IRQS];
-
static struct console *console;
-static unsigned char *tmp_buf;
-
-extern struct console *console_drivers; /* from kernel/printk.c */
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
-#ifdef SIMSERIAL_DEBUG
- printk("rs_stop: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
- tty->stopped, tty->hw_stopped, tty->flow_stopped);
-#endif
-
-}
-
-static void rs_start(struct tty_struct *tty)
-{
-#ifdef SIMSERIAL_DEBUG
- printk("rs_start: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
- tty->stopped, tty->hw_stopped, tty->flow_stopped);
-#endif
-}
-
-static void receive_chars(struct tty_struct *tty)
+static void receive_chars(struct tty_struct *tty)
{
unsigned char ch;
static unsigned char seen_esc = 0;
while ( (ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR)) ) {
- if ( ch == 27 && seen_esc == 0 ) {
+ if (ch == 27 && seen_esc == 0) {
seen_esc = 1;
continue;
- } else {
- if ( seen_esc==1 && ch == 'O' ) {
- seen_esc = 2;
- continue;
- } else if ( seen_esc == 2 ) {
- if ( ch == 'P' ) /* F1 */
- show_state();
+ } else if (seen_esc == 1 && ch == 'O') {
+ seen_esc = 2;
+ continue;
+ } else if (seen_esc == 2) {
+ if (ch == 'P') /* F1 */
+ show_state();
#ifdef CONFIG_MAGIC_SYSRQ
- if ( ch == 'S' ) { /* F4 */
- do
- ch = ia64_ssc(0, 0, 0, 0,
- SSC_GETCHAR);
- while (!ch);
- handle_sysrq(ch);
- }
-#endif
- seen_esc = 0;
- continue;
+ if (ch == 'S') { /* F4 */
+ do {
+ ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR);
+ } while (!ch);
+ handle_sysrq(ch);
}
+#endif
+ seen_esc = 0;
+ continue;
}
seen_esc = 0;
@@ -169,22 +92,19 @@ static void receive_chars(struct tty_struct *tty)
*/
static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
{
- struct async_struct * info;
+ struct serial_state *info = dev_id;
+ struct tty_struct *tty = tty_port_tty_get(&info->port);
- /*
- * I don't know exactly why they don't use the dev_id opaque data
- * pointer instead of this extra lookup table
- */
- info = IRQ_ports[irq];
- if (!info || !info->tty) {
- printk(KERN_INFO "simrs_interrupt_single: info|tty=0 info=%p problem\n", info);
+ if (!tty) {
+ printk(KERN_INFO "%s: tty=0 problem\n", __func__);
return IRQ_NONE;
}
/*
* pretty simple in our case, because we only get interrupts
* on inbound traffic
*/
- receive_chars(info->tty);
+ receive_chars(tty);
+ tty_kref_put(tty);
return IRQ_HANDLED;
}
@@ -194,17 +114,12 @@ static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
* -------------------------------------------------------------------
*/
-static void do_softint(struct work_struct *private_)
-{
- printk(KERN_ERR "simserial: do_softint called\n");
-}
-
static int rs_put_char(struct tty_struct *tty, unsigned char ch)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
unsigned long flags;
- if (!tty || !info->xmit.buf)
+ if (!info->xmit.buf)
return 0;
local_irq_save(flags);
@@ -218,12 +133,12 @@ static int rs_put_char(struct tty_struct *tty, unsigned char ch)
return 1;
}
-static void transmit_chars(struct async_struct *info, int *intr_done)
+static void transmit_chars(struct tty_struct *tty, struct serial_state *info,
+ int *intr_done)
{
int count;
unsigned long flags;
-
local_irq_save(flags);
if (info->x_char) {
@@ -231,16 +146,16 @@ static void transmit_chars(struct async_struct *info, int *intr_done)
console->write(console, &c, 1);
- info->state->icount.tx++;
info->x_char = 0;
goto out;
}
- if (info->xmit.head == info->xmit.tail || info->tty->stopped || info->tty->hw_stopped) {
+ if (info->xmit.head == info->xmit.tail || tty->stopped ||
+ tty->hw_stopped) {
#ifdef SIMSERIAL_DEBUG
printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
- info->xmit.head, info->xmit.tail, info->tty->stopped);
+ info->xmit.head, info->xmit.tail, tty->stopped);
#endif
goto out;
}
@@ -272,24 +187,24 @@ out:
static void rs_flush_chars(struct tty_struct *tty)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
- if (info->xmit.head == info->xmit.tail || tty->stopped || tty->hw_stopped ||
- !info->xmit.buf)
+ if (info->xmit.head == info->xmit.tail || tty->stopped ||
+ tty->hw_stopped || !info->xmit.buf)
return;
- transmit_chars(info, NULL);
+ transmit_chars(tty, info, NULL);
}
-
static int rs_write(struct tty_struct * tty,
const unsigned char *buf, int count)
{
+ struct serial_state *info = tty->driver_data;
int c, ret = 0;
- struct async_struct *info = (struct async_struct *)tty->driver_data;
unsigned long flags;
- if (!tty || !info->xmit.buf || !tmp_buf) return 0;
+ if (!info->xmit.buf)
+ return 0;
local_irq_save(flags);
while (1) {
@@ -310,30 +225,30 @@ static int rs_write(struct tty_struct * tty,
/*
* Hey, we transmit directly from here in our case
*/
- if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE)
- && !tty->stopped && !tty->hw_stopped) {
- transmit_chars(info, NULL);
- }
+ if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) &&
+ !tty->stopped && !tty->hw_stopped)
+ transmit_chars(tty, info, NULL);
+
return ret;
}
static int rs_write_room(struct tty_struct *tty)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
}
static int rs_chars_in_buffer(struct tty_struct *tty)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
}
static void rs_flush_buffer(struct tty_struct *tty)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
unsigned long flags;
local_irq_save(flags);
@@ -349,7 +264,7 @@ static void rs_flush_buffer(struct tty_struct *tty)
*/
static void rs_send_xchar(struct tty_struct *tty, char ch)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
info->x_char = ch;
if (ch) {
@@ -357,7 +272,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
* I guess we could call console->write() directly but
* let's do that for now.
*/
- transmit_chars(info, NULL);
+ transmit_chars(tty, info, NULL);
}
}
@@ -371,14 +286,15 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
*/
static void rs_throttle(struct tty_struct * tty)
{
- if (I_IXOFF(tty)) rs_send_xchar(tty, STOP_CHAR(tty));
+ if (I_IXOFF(tty))
+ rs_send_xchar(tty, STOP_CHAR(tty));
printk(KERN_INFO "simrs_throttle called\n");
}
static void rs_unthrottle(struct tty_struct * tty)
{
- struct async_struct *info = (struct async_struct *)tty->driver_data;
+ struct serial_state *info = tty->driver_data;
if (I_IXOFF(tty)) {
if (info->x_char)
@@ -389,7 +305,6 @@ static void rs_unthrottle(struct tty_struct * tty)
printk(KERN_INFO "simrs_unthrottle called\n");
}
-
static int rs_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
{
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
@@ -400,48 +315,21 @@ static int rs_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
}
switch (cmd) {
- case TIOCGSERIAL:
- printk(KERN_INFO "simrs_ioctl TIOCGSERIAL called\n");
- return 0;
- case TIOCSSERIAL:
- printk(KERN_INFO "simrs_ioctl TIOCSSERIAL called\n");
- return 0;
- case TIOCSERCONFIG:
- printk(KERN_INFO "rs_ioctl: TIOCSERCONFIG called\n");
- return -EINVAL;
-
- case TIOCSERGETLSR: /* Get line status register */
- printk(KERN_INFO "rs_ioctl: TIOCSERGETLSR called\n");
- return -EINVAL;
-
- case TIOCSERGSTRUCT:
- printk(KERN_INFO "rs_ioctl: TIOCSERGSTRUCT called\n");
-#if 0
- if (copy_to_user((struct async_struct *) arg,
- info, sizeof(struct async_struct)))
- return -EFAULT;
-#endif
- return 0;
-
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- printk(KERN_INFO "rs_ioctl: TIOCMIWAIT: called\n");
- return 0;
- case TIOCSERGWILD:
- case TIOCSERSWILD:
- /* "setserial -W" is called in Debian boot */
- printk (KERN_INFO "TIOCSER?WILD ioctl obsolete, ignored.\n");
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
+ case TIOCGSERIAL:
+ case TIOCSSERIAL:
+ case TIOCSERGSTRUCT:
+ case TIOCMIWAIT:
+ return 0;
+ case TIOCSERCONFIG:
+ case TIOCSERGETLSR: /* Get line status register */
+ return -EINVAL;
+ case TIOCSERGWILD:
+ case TIOCSERSWILD:
+ /* "setserial -W" is called in Debian boot */
+ printk (KERN_INFO "TIOCSER?WILD ioctl obsolete, ignored.\n");
+ return 0;
+ }
+ return -ENOIOCTLCMD;
}
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
@@ -452,220 +340,50 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS)) {
tty->hw_stopped = 0;
- rs_start(tty);
}
}
/*
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
*/
-static void shutdown(struct async_struct * info)
+static void shutdown(struct tty_port *port)
{
- unsigned long flags;
- struct serial_state *state;
- int retval;
-
- if (!(info->flags & ASYNC_INITIALIZED)) return;
-
- state = info->state;
-
-#ifdef SIMSERIAL_DEBUG
- printk("Shutting down serial port %d (irq %d)....", info->line,
- state->irq);
-#endif
+ struct serial_state *info = container_of(port, struct serial_state,
+ port);
+ unsigned long flags;
local_irq_save(flags);
- {
- /*
- * First unlink the serial port from the IRQ chain...
- */
- if (info->next_port)
- info->next_port->prev_port = info->prev_port;
- if (info->prev_port)
- info->prev_port->next_port = info->next_port;
- else
- IRQ_ports[state->irq] = info->next_port;
-
- /*
- * Free the IRQ, if necessary
- */
- if (state->irq && (!IRQ_ports[state->irq] ||
- !IRQ_ports[state->irq]->next_port)) {
- if (IRQ_ports[state->irq]) {
- free_irq(state->irq, NULL);
- retval = request_irq(state->irq, rs_interrupt_single,
- IRQ_T(info), "serial", NULL);
-
- if (retval)
- printk(KERN_ERR "serial shutdown: request_irq: error %d"
- " Couldn't reacquire IRQ.\n", retval);
- } else
- free_irq(state->irq, NULL);
- }
-
- if (info->xmit.buf) {
- free_page((unsigned long) info->xmit.buf);
- info->xmit.buf = NULL;
- }
-
- if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
+ if (info->irq)
+ free_irq(info->irq, info);
- info->flags &= ~ASYNC_INITIALIZED;
+ if (info->xmit.buf) {
+ free_page((unsigned long) info->xmit.buf);
+ info->xmit.buf = NULL;
}
local_irq_restore(flags);
}
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
static void rs_close(struct tty_struct *tty, struct file * filp)
{
- struct async_struct * info = (struct async_struct *)tty->driver_data;
- struct serial_state *state;
- unsigned long flags;
-
- if (!info ) return;
-
- state = info->state;
-
- local_irq_save(flags);
- if (tty_hung_up_p(filp)) {
-#ifdef SIMSERIAL_DEBUG
- printk("rs_close: hung_up\n");
-#endif
- local_irq_restore(flags);
- return;
- }
-#ifdef SIMSERIAL_DEBUG
- printk("rs_close ttys%d, count = %d\n", info->line, state->count);
-#endif
- if ((tty->count == 1) && (state->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. state->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
- "state->count is %d\n", state->count);
- state->count = 1;
- }
- if (--state->count < 0) {
- printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
- info->line, state->count);
- state->count = 0;
- }
- if (state->count) {
- local_irq_restore(flags);
- return;
- }
- info->flags |= ASYNC_CLOSING;
- local_irq_restore(flags);
+ struct serial_state *info = tty->driver_data;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- shutdown(info);
- rs_flush_buffer(tty);
- tty_ldisc_flush(tty);
- info->event = 0;
- info->tty = NULL;
- if (info->blocked_open) {
- if (info->close_delay)
- schedule_timeout_interruptible(info->close_delay);
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
+ tty_port_close(&info->port, tty, filp);
}
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-}
-
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
static void rs_hangup(struct tty_struct *tty)
{
- struct async_struct * info = (struct async_struct *)tty->driver_data;
- struct serial_state *state = info->state;
-
-#ifdef SIMSERIAL_DEBUG
- printk("rs_hangup: called\n");
-#endif
-
- state = info->state;
+ struct serial_state *info = tty->driver_data;
rs_flush_buffer(tty);
- if (info->flags & ASYNC_CLOSING)
- return;
- shutdown(info);
-
- info->event = 0;
- state->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
- info->tty = NULL;
- wake_up_interruptible(&info->open_wait);
+ tty_port_hangup(&info->port);
}
-
-static int get_async_struct(int line, struct async_struct **ret_info)
+static int activate(struct tty_port *port, struct tty_struct *tty)
{
- struct async_struct *info;
- struct serial_state *sstate;
-
- sstate = rs_table + line;
- sstate->count++;
- if (sstate->info) {
- *ret_info = sstate->info;
- return 0;
- }
- info = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
- if (!info) {
- sstate->count--;
- return -ENOMEM;
- }
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- init_waitqueue_head(&info->delta_msr_wait);
- info->magic = SERIAL_MAGIC;
- info->port = sstate->port;
- info->flags = sstate->flags;
- info->xmit_fifo_size = sstate->xmit_fifo_size;
- info->line = line;
- INIT_WORK(&info->work, do_softint);
- info->state = sstate;
- if (sstate->info) {
- kfree(info);
- *ret_info = sstate->info;
- return 0;
- }
- *ret_info = sstate->info = info;
- return 0;
-}
-
-static int
-startup(struct async_struct *info)
-{
- unsigned long flags;
- int retval=0;
- irq_handler_t handler;
- struct serial_state *state= info->state;
- unsigned long page;
+ struct serial_state *state = container_of(port, struct serial_state,
+ port);
+ unsigned long flags, page;
+ int retval = 0;
page = get_zeroed_page(GFP_KERNEL);
if (!page)
@@ -673,86 +391,31 @@ startup(struct async_struct *info)
local_irq_save(flags);
- if (info->flags & ASYNC_INITIALIZED) {
- free_page(page);
- goto errout;
- }
-
- if (!state->port || !state->type) {
- if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
- free_page(page);
- goto errout;
- }
- if (info->xmit.buf)
+ if (state->xmit.buf)
free_page(page);
else
- info->xmit.buf = (unsigned char *) page;
-
-#ifdef SIMSERIAL_DEBUG
- printk("startup: ttys%d (irq %d)...", info->line, state->irq);
-#endif
+ state->xmit.buf = (unsigned char *) page;
- /*
- * Allocate the IRQ if necessary
- */
- if (state->irq && (!IRQ_ports[state->irq] ||
- !IRQ_ports[state->irq]->next_port)) {
- if (IRQ_ports[state->irq]) {
- retval = -EBUSY;
- goto errout;
- } else
- handler = rs_interrupt_single;
-
- retval = request_irq(state->irq, handler, IRQ_T(info), "simserial", NULL);
- if (retval) {
- if (capable(CAP_SYS_ADMIN)) {
- if (info->tty)
- set_bit(TTY_IO_ERROR,
- &info->tty->flags);
- retval = 0;
- }
+ if (state->irq) {
+ retval = request_irq(state->irq, rs_interrupt_single, 0,
+ "simserial", state);
+ if (retval)
goto errout;
- }
}
- /*
- * Insert serial port into IRQ chain.
- */
- info->prev_port = NULL;
- info->next_port = IRQ_ports[state->irq];
- if (info->next_port)
- info->next_port->prev_port = info;
- IRQ_ports[state->irq] = info;
-
- if (info->tty) clear_bit(TTY_IO_ERROR, &info->tty->flags);
-
- info->xmit.head = info->xmit.tail = 0;
-
-#if 0
- /*
- * Set up serial timers...
- */
- timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
- timer_active |= 1 << RS_TIMER;
-#endif
+ state->xmit.head = state->xmit.tail = 0;
/*
* Set up the tty->alt_speed kludge
*/
- if (info->tty) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- info->tty->alt_speed = 460800;
- }
-
- info->flags |= ASYNC_INITIALIZED;
- local_irq_restore(flags);
- return 0;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ tty->alt_speed = 460800;
errout:
local_irq_restore(flags);
@@ -768,56 +431,11 @@ errout:
*/
static int rs_open(struct tty_struct *tty, struct file * filp)
{
- struct async_struct *info;
- int retval, line;
- unsigned long page;
+ struct serial_state *info = rs_table + tty->index;
+ struct tty_port *port = &info->port;
- line = tty->index;
- if ((line < 0) || (line >= NR_PORTS))
- return -ENODEV;
- retval = get_async_struct(line, &info);
- if (retval)
- return retval;
tty->driver_data = info;
- info->tty = tty;
-
-#ifdef SIMSERIAL_DEBUG
- printk("rs_open %s, count = %d\n", tty->name, info->state->count);
-#endif
- info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- if (!tmp_buf) {
- page = get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
-
- /*
- * If the port is the middle of closing, bail out now
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * Start up serial port
- */
- retval = startup(info);
- if (retval) {
- return retval;
- }
+ tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
/*
* figure out which console to use (should be one already)
@@ -828,30 +446,21 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
console = console->next;
}
-#ifdef SIMSERIAL_DEBUG
- printk("rs_open ttys%d successful\n", info->line);
-#endif
- return 0;
+ return tty_port_open(port, tty, filp);
}
/*
* /proc fs routines....
*/
-static inline void line_info(struct seq_file *m, struct serial_state *state)
-{
- seq_printf(m, "%d: uart:%s port:%lX irq:%d\n",
- state->line, uart_config[state->type].name,
- state->port, state->irq);
-}
-
static int rs_proc_show(struct seq_file *m, void *v)
{
int i;
- seq_printf(m, "simserinfo:1.0 driver:%s\n", serial_version);
+ seq_printf(m, "simserinfo:1.0\n");
for (i = 0; i < NR_PORTS; i++)
- line_info(m, &rs_table[i]);
+ seq_printf(m, "%d: uart:16550 port:3F8 irq:%d\n",
+ i, rs_table[i].irq);
return 0;
}
@@ -868,25 +477,6 @@ static const struct file_operations rs_proc_fops = {
.release = single_release,
};
-/*
- * ---------------------------------------------------------------------
- * rs_init() and friends
- *
- * rs_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-static inline void show_serial_version(void)
-{
- printk(KERN_INFO "%s version %s with", serial_name, serial_version);
- printk(KERN_INFO " no serial options enabled\n");
-}
-
static const struct tty_operations hp_ops = {
.open = rs_open,
.close = rs_close,
@@ -901,34 +491,31 @@ static const struct tty_operations hp_ops = {
.unthrottle = rs_unthrottle,
.send_xchar = rs_send_xchar,
.set_termios = rs_set_termios,
- .stop = rs_stop,
- .start = rs_start,
.hangup = rs_hangup,
- .wait_until_sent = rs_wait_until_sent,
.proc_fops = &rs_proc_fops,
};
-/*
- * The serial driver boot-time initialization code!
- */
-static int __init
-simrs_init (void)
+static const struct tty_port_operations hp_port_ops = {
+ .activate = activate,
+ .shutdown = shutdown,
+};
+
+static int __init simrs_init(void)
{
- int i, rc;
- struct serial_state *state;
+ struct serial_state *state;
+ int retval;
if (!ia64_platform_is("hpsim"))
return -ENODEV;
- hp_simserial_driver = alloc_tty_driver(1);
+ hp_simserial_driver = alloc_tty_driver(NR_PORTS);
if (!hp_simserial_driver)
return -ENOMEM;
- show_serial_version();
+ printk(KERN_INFO "SimSerial driver with no serial options enabled\n");
/* Initialize the tty_driver structure */
- hp_simserial_driver->owner = THIS_MODULE;
hp_simserial_driver->driver_name = "simserial";
hp_simserial_driver->name = "ttyS";
hp_simserial_driver->major = TTY_MAJOR;
@@ -941,31 +528,33 @@ simrs_init (void)
hp_simserial_driver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(hp_simserial_driver, &hp_ops);
- /*
- * Let's have a little bit of fun !
- */
- for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
+ state = rs_table;
+ tty_port_init(&state->port);
+ state->port.ops = &hp_port_ops;
+ state->port.close_delay = 0; /* XXX really 0? */
- if (state->type == PORT_UNKNOWN) continue;
+ retval = hpsim_get_irq(KEYBOARD_INTR);
+ if (retval < 0) {
+ printk(KERN_ERR "%s: out of interrupt vectors!\n",
+ __func__);
+ goto err_free_tty;
+ }
- if (!state->irq) {
- if ((rc = assign_irq_vector(AUTO_ASSIGN)) < 0)
- panic("%s: out of interrupt vectors!\n",
- __func__);
- state->irq = rc;
- ia64_ssc_connect_irq(KEYBOARD_INTR, state->irq);
- }
+ state->irq = retval;
- printk(KERN_INFO "ttyS%d at 0x%04lx (irq = %d) is a %s\n",
- state->line,
- state->port, state->irq,
- uart_config[state->type].name);
- }
+ /* the port is imaginary */
+ printk(KERN_INFO "ttyS0 at 0x03f8 (irq = %d) is a 16550\n", state->irq);
- if (tty_register_driver(hp_simserial_driver))
- panic("Couldn't register simserial driver\n");
+ retval = tty_register_driver(hp_simserial_driver);
+ if (retval) {
+ printk(KERN_ERR "Couldn't register simserial driver\n");
+ goto err_free_tty;
+ }
return 0;
+err_free_tty:
+ put_tty_driver(hp_simserial_driver);
+ return retval;
}
#ifndef MODULE
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