* driver for that.
*
*
- * Copyright (c) 2004 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* http://oss.sgi.com/projects/GenInfo/NoticeExplan
*/
-#include <linux/config.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/serial.h>
};
static struct sn_cons_port sal_console_port;
+static int sn_process_input;
/* Only used if USE_DYNAMIC_MINOR is set to 1 */
static struct miscdevice misc; /* used with misc_register for dynamic */
/**
* snp_stop_tx - stop the transmitter - no-op for us
* @port: Port to operat eon - we ignore - no-op function
- * @tty_stop: Set to 1 if called via uart_stop
*
*/
-static void snp_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void snp_stop_tx(struct uart_port *port)
{
}
/**
* snp_start_tx - Start transmitter
* @port: Port to operate on
- * @tty_stop: Set to 1 if called via uart_start
*
*/
-static void snp_start_tx(struct uart_port *port, unsigned int tty_stop)
+static void snp_start_tx(struct uart_port *port)
{
if (sal_console_port.sc_ops->sal_wakeup_transmit)
sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port,
*
*/
static void
-snp_set_termios(struct uart_port *port, struct termios *termios,
- struct termios *old)
+snp_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
{
}
/**
* sn_receive_chars - Grab characters, pass them to tty layer
* @port: Port to operate on
- * @regs: Saved registers (needed by uart_handle_sysrq_char)
* @flags: irq flags
*
* Note: If we're not registered with the serial core infrastructure yet,
*
*/
static void
-sn_receive_chars(struct sn_cons_port *port, struct pt_regs *regs,
- unsigned long flags)
+sn_receive_chars(struct sn_cons_port *port, unsigned long flags)
{
int ch;
struct tty_struct *tty;
sysrq_requested = 0;
if (ch && time_before(jiffies, sysrq_timeout)) {
spin_unlock_irqrestore(&port->sc_port.lock, flags);
- handle_sysrq(ch, regs, NULL);
+ handle_sysrq(ch, NULL);
spin_lock_irqsave(&port->sc_port.lock, flags);
/* ignore actual sysrq command char */
continue;
/* record the character to pass up to the tty layer */
if (tty) {
- *tty->flip.char_buf_ptr = ch;
- *tty->flip.flag_buf_ptr = TTY_NORMAL;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
- if (tty->flip.count == TTY_FLIPBUF_SIZE)
+ if(tty_insert_flip_char(tty, ch, TTY_NORMAL) == 0)
break;
}
port->sc_port.icount.rx++;
if (uart_circ_empty(xmit) || uart_tx_stopped(&port->sc_port)) {
/* Nothing to do. */
+ ia64_sn_console_intr_disable(SAL_CONSOLE_INTR_XMIT);
return;
}
uart_write_wakeup(&port->sc_port);
if (uart_circ_empty(xmit))
- snp_stop_tx(&port->sc_port, 0); /* no-op for us */
+ snp_stop_tx(&port->sc_port); /* no-op for us */
}
/**
* sn_sal_interrupt - Handle console interrupts
* @irq: irq #, useful for debug statements
* @dev_id: our pointer to our port (sn_cons_port which contains the uart port)
- * @regs: Saved registers, used by sn_receive_chars for uart_handle_sysrq_char
*
*/
-static irqreturn_t sn_sal_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t sn_sal_interrupt(int irq, void *dev_id)
{
struct sn_cons_port *port = (struct sn_cons_port *)dev_id;
unsigned long flags;
spin_lock_irqsave(&port->sc_port.lock, flags);
if (status & SAL_CONSOLE_INTR_RECV) {
- sn_receive_chars(port, regs, flags);
+ sn_receive_chars(port, flags);
}
if (status & SAL_CONSOLE_INTR_XMIT) {
sn_transmit_chars(port, TRANSMIT_BUFFERED);
static int sn_sal_connect_interrupt(struct sn_cons_port *port)
{
if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt,
- SA_INTERRUPT | SA_SHIRQ,
+ IRQF_DISABLED | IRQF_SHARED,
"SAL console driver", port) >= 0) {
return SGI_UART_VECTOR;
}
if (!port->sc_port.irq) {
spin_lock_irqsave(&port->sc_port.lock, flags);
- sn_receive_chars(port, NULL, flags);
+ if (sn_process_input)
+ sn_receive_chars(port, flags);
sn_transmit_chars(port, TRANSMIT_RAW);
spin_unlock_irqrestore(&port->sc_port.lock, flags);
mod_timer(&port->sc_timer,
static void sn_sal_console_write(struct console *, const char *, unsigned);
static int __init sn_sal_console_setup(struct console *, char *);
-extern struct uart_driver sal_console_uart;
+static struct uart_driver sal_console_uart;
extern struct tty_driver *uart_console_device(struct console *, int *);
static struct console sal_console = {
int retval;
if (!ia64_platform_is("sn2"))
- return -ENODEV;
+ return 0;
printk(KERN_INFO "sn_console: Console driver init\n");
misc.name = DEVICE_NAME_DYNAMIC;
retval = misc_register(&misc);
if (retval != 0) {
- printk
- ("Failed to register console device using misc_register.\n");
+ printk(KERN_WARNING "Failed to register console "
+ "device using misc_register.\n");
return -ENODEV;
}
sal_console_uart.major = MISC_MAJOR;
if (!IS_RUNNING_ON_SIMULATOR()) {
sn_sal_switch_to_interrupts(&sal_console_port);
}
+ sn_process_input = 1;
return 0;
}
{
unsigned long flags = 0;
struct sn_cons_port *port = &sal_console_port;
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
static int stole_lock = 0;
-#endif
BUG_ON(!port->sc_is_asynch);
/* We can't look at the xmit buffer if we're not registered with serial core
* yet. So only do the fancy recovery after registering
*/
- if (port->sc_port.info) {
-
- /* somebody really wants this output, might be an
- * oops, kdb, panic, etc. make sure they get it. */
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
- if (spin_is_locked(&port->sc_port.lock)) {
- int lhead = port->sc_port.info->xmit.head;
- int ltail = port->sc_port.info->xmit.tail;
- int counter, got_lock = 0;
+ if (!port->sc_port.info) {
+ /* Not yet registered with serial core - simple case */
+ puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
+ return;
+ }
- /*
- * We attempt to determine if someone has died with the
- * lock. We wait ~20 secs after the head and tail ptrs
- * stop moving and assume the lock holder is not functional
- * and plow ahead. If the lock is freed within the time out
- * period we re-get the lock and go ahead normally. We also
- * remember if we have plowed ahead so that we don't have
- * to wait out the time out period again - the asumption
- * is that we will time out again.
- */
+ /* somebody really wants this output, might be an
+ * oops, kdb, panic, etc. make sure they get it. */
+ if (spin_is_locked(&port->sc_port.lock)) {
+ int lhead = port->sc_port.info->xmit.head;
+ int ltail = port->sc_port.info->xmit.tail;
+ int counter, got_lock = 0;
+
+ /*
+ * We attempt to determine if someone has died with the
+ * lock. We wait ~20 secs after the head and tail ptrs
+ * stop moving and assume the lock holder is not functional
+ * and plow ahead. If the lock is freed within the time out
+ * period we re-get the lock and go ahead normally. We also
+ * remember if we have plowed ahead so that we don't have
+ * to wait out the time out period again - the asumption
+ * is that we will time out again.
+ */
- for (counter = 0; counter < 150; mdelay(125), counter++) {
- if (!spin_is_locked(&port->sc_port.lock)
- || stole_lock) {
- if (!stole_lock) {
- spin_lock_irqsave(&port->
- sc_port.lock,
- flags);
- got_lock = 1;
- }
- break;
- } else {
- /* still locked */
- if ((lhead !=
- port->sc_port.info->xmit.head)
- || (ltail !=
- port->sc_port.info->xmit.
- tail)) {
- lhead =
- port->sc_port.info->xmit.
- head;
- ltail =
- port->sc_port.info->xmit.
- tail;
- counter = 0;
- }
+ for (counter = 0; counter < 150; mdelay(125), counter++) {
+ if (!spin_is_locked(&port->sc_port.lock)
+ || stole_lock) {
+ if (!stole_lock) {
+ spin_lock_irqsave(&port->sc_port.lock,
+ flags);
+ got_lock = 1;
}
- }
- /* flush anything in the serial core xmit buffer, raw */
- sn_transmit_chars(port, 1);
- if (got_lock) {
- spin_unlock_irqrestore(&port->sc_port.lock,
- flags);
- stole_lock = 0;
+ break;
} else {
- /* fell thru */
- stole_lock = 1;
+ /* still locked */
+ if ((lhead != port->sc_port.info->xmit.head)
+ || (ltail !=
+ port->sc_port.info->xmit.tail)) {
+ lhead =
+ port->sc_port.info->xmit.head;
+ ltail =
+ port->sc_port.info->xmit.tail;
+ counter = 0;
+ }
}
- puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
- } else {
- stole_lock = 0;
-#endif
- spin_lock_irqsave(&port->sc_port.lock, flags);
- sn_transmit_chars(port, 1);
+ }
+ /* flush anything in the serial core xmit buffer, raw */
+ sn_transmit_chars(port, 1);
+ if (got_lock) {
spin_unlock_irqrestore(&port->sc_port.lock, flags);
-
- puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
+ stole_lock = 0;
+ } else {
+ /* fell thru */
+ stole_lock = 1;
}
-#endif
- }
- else {
- /* Not yet registered with serial core - simple case */
+ puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
+ } else {
+ stole_lock = 0;
+ spin_lock_irqsave(&port->sc_port.lock, flags);
+ sn_transmit_chars(port, 1);
+ spin_unlock_irqrestore(&port->sc_port.lock, flags);
+
puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
}
}
return -1;
sal_console_port.sc_ops = &poll_ops;
+ spin_lock_init(&sal_console_port.sc_port.lock);
early_sn_setup(); /* Find SAL entry points */
register_console(&sal_console_early);
git://git.onelab.eu / linux-2.6.git / blobdiff