#include <linux/miscdevice.h>
#include <linux/serial_core.h>
+#include <asm/io.h>
#include <asm/sn/simulator.h>
-#include <asm/sn/sn2/sn_private.h>
#include <asm/sn/sn_sal.h>
/* number of characters we can transmit to the SAL console at a time */
/* To use dynamic numbers only and not use the assigned major and minor,
* define the following.. */
-/* #define USE_DYNAMIC_MINOR 1 */ /* use dynamic minor number */
-#define USE_DYNAMIC_MINOR 0 /* Don't rely on misc_register dynamic minor */
+ /* #define USE_DYNAMIC_MINOR 1 *//* use dynamic minor number */
+#define USE_DYNAMIC_MINOR 0 /* Don't rely on misc_register dynamic minor */
/* Device name we're using */
#define DEVICE_NAME "ttySG"
-#define DEVICE_NAME_DYNAMIC "ttySG0" /* need full name for misc_register */
+#define DEVICE_NAME_DYNAMIC "ttySG0" /* need full name for misc_register */
/* The major/minor we are using, ignored for USE_DYNAMIC_MINOR */
#define DEVICE_MAJOR 204
#define DEVICE_MINOR 40
+#ifdef CONFIG_MAGIC_SYSRQ
+static char sysrq_serial_str[] = "\eSYS";
+static char *sysrq_serial_ptr = sysrq_serial_str;
+static unsigned long sysrq_requested;
+#endif /* CONFIG_MAGIC_SYSRQ */
+
/*
* Port definition - this kinda drives it all
*/
static struct sn_cons_port sal_console_port;
/* Only used if USE_DYNAMIC_MINOR is set to 1 */
-static struct miscdevice misc; /* used with misc_register for dynamic */
+static struct miscdevice misc; /* used with misc_register for dynamic */
-extern u64 master_node_bedrock_address;
extern void early_sn_setup(void);
#undef DEBUG
static int snt_hw_puts_buffered(const char *, int);
static int snt_poll_getc(void);
static int snt_poll_input_pending(void);
-static int snt_sim_puts(const char *, int);
-static int snt_sim_getc(void);
-static int snt_sim_input_pending(void);
static int snt_intr_getc(void);
static int snt_intr_input_pending(void);
static void sn_transmit_chars(struct sn_cons_port *, int);
.sal_input_pending = snt_poll_input_pending
};
-/* A table for the simulator */
-static struct sn_sal_ops sim_ops = {
- .sal_puts_raw = snt_sim_puts,
- .sal_puts = snt_sim_puts,
- .sal_getc = snt_sim_getc,
- .sal_input_pending = snt_sim_input_pending
-};
-
/* A table for interrupts enabled */
static struct sn_sal_ops intr_ops = {
.sal_puts_raw = snt_hw_puts_raw,
* output is buffered and sent to the SAL asynchronously (either by
* timer callback or by UART interrupt) */
-
/* routines for running the console in polling mode */
/**
* snt_poll_getc - Get a character from the console in polling mode
*
*/
-static int
-snt_poll_getc(void)
+static int snt_poll_getc(void)
{
int ch;
* snt_poll_input_pending - Check if any input is waiting - polling mode.
*
*/
-static int
-snt_poll_input_pending(void)
+static int snt_poll_input_pending(void)
{
int status, input;
return !status && input;
}
-/* routines for running the console on the simulator */
-
-/**
- * snt_sim_puts - send to the console, used in simulator mode
- * @str: String to send
- * @count: length of string
- *
- */
-static int
-snt_sim_puts(const char *str, int count)
-{
- int counter = count;
-
-#ifdef FLAG_DIRECT_CONSOLE_WRITES
- /* This is an easy way to pre-pend the output to know whether the output
- * was done via sal or directly */
- writeb('[', master_node_bedrock_address + (UART_TX << 3));
- writeb('+', master_node_bedrock_address + (UART_TX << 3));
- writeb(']', master_node_bedrock_address + (UART_TX << 3));
- writeb(' ', master_node_bedrock_address + (UART_TX << 3));
-#endif /* FLAG_DIRECT_CONSOLE_WRITES */
- while (counter > 0) {
- writeb(*str, master_node_bedrock_address + (UART_TX << 3));
- counter--;
- str++;
- }
- return count;
-}
-
-/**
- * snt_sim_getc - Get character from console in simulator mode
- *
- */
-static int
-snt_sim_getc(void)
-{
- return readb(master_node_bedrock_address + (UART_RX << 3));
-}
-
-/**
- * snt_sim_input_pending - Check if there is input pending in simulator mode
- *
- */
-static int
-snt_sim_input_pending(void)
-{
- return readb(master_node_bedrock_address +
- (UART_LSR << 3)) & UART_LSR_DR;
-}
-
/* routines for an interrupt driven console (normal) */
/**
* snt_intr_getc - Get a character from the console, interrupt mode
*
*/
-static int
-snt_intr_getc(void)
+static int snt_intr_getc(void)
{
return ia64_sn_console_readc();
}
* snt_intr_input_pending - Check if input is pending, interrupt mode
*
*/
-static int
-snt_intr_input_pending(void)
+static int snt_intr_input_pending(void)
{
return ia64_sn_console_intr_status() & SAL_CONSOLE_INTR_RECV;
}
* @len: Length
*
*/
-static int
-snt_hw_puts_raw(const char *s, int len)
+static int snt_hw_puts_raw(const char *s, int len)
{
/* this will call the PROM and not return until this is done */
return ia64_sn_console_putb(s, len);
* @len: Length
*
*/
-static int
-snt_hw_puts_buffered(const char *s, int len)
+static int snt_hw_puts_buffered(const char *s, int len)
{
/* queue data to the PROM */
return ia64_sn_console_xmit_chars((char *)s, len);
* @port: Port to operate with (we ignore since we only have one port)
*
*/
-static const char *
-snp_type(struct uart_port *port)
+static const char *snp_type(struct uart_port *port)
{
return ("SGI SN L1");
}
* @port: Port to operate on (we ignore since we only have one port)
*
*/
-static unsigned int
-snp_tx_empty(struct uart_port *port)
+static unsigned int snp_tx_empty(struct uart_port *port)
{
return 1;
}
* @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, unsigned int tty_stop)
{
}
* @port: Port to operate on - we ignore - no-op function
*
*/
-static void
-snp_release_port(struct uart_port *port)
+static void snp_release_port(struct uart_port *port)
{
}
* @port: Port to operate on - we ignore - no-op function
*
*/
-static void
-snp_enable_ms(struct uart_port *port)
+static void snp_enable_ms(struct uart_port *port)
{
}
* @port: Port to shut down - we ignore
*
*/
-static void
-snp_shutdown(struct uart_port *port)
+static void snp_shutdown(struct uart_port *port)
{
}
* @mctrl: Lines to set/unset - we ignore
*
*/
-static void
-snp_set_mctrl(struct uart_port *port, unsigned int mctrl)
+static void snp_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
}
* @port: port to operate on - we only have one port so we ignore this
*
*/
-static unsigned int
-snp_get_mctrl(struct uart_port *port)
+static unsigned int snp_get_mctrl(struct uart_port *port)
{
return TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS;
}
* @port: Port to operate on - we ignore
*
*/
-static void
-snp_stop_rx(struct uart_port *port)
+static void snp_stop_rx(struct uart_port *port)
{
}
* @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, unsigned int tty_stop)
{
if (sal_console_port.sc_ops->sal_wakeup_transmit)
- sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port, TRANSMIT_BUFFERED);
+ sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port,
+ TRANSMIT_BUFFERED);
}
* @break_state: Break state
*
*/
-static void
-snp_break_ctl(struct uart_port *port, int break_state)
+static void snp_break_ctl(struct uart_port *port, int break_state)
{
}
* @port: Port to operate on
*
*/
-static int
-snp_startup(struct uart_port *port)
+static int snp_startup(struct uart_port *port)
{
return 0;
}
* @port: port to operate on
*
*/
-static int
-snp_request_port(struct uart_port *port)
+static int snp_request_port(struct uart_port *port)
{
return 0;
}
* @flags: flags used for port setup
*
*/
-static void
-snp_config_port(struct uart_port *port, int flags)
+static void snp_config_port(struct uart_port *port, int flags)
{
}
* itself may be broken.
*
*/
-static int
-sn_debug_printf(const char *fmt, ...)
+static int sn_debug_printf(const char *fmt, ...)
{
static char printk_buf[1024];
int printed_len;
va_list args;
va_start(args, fmt);
- printed_len = vsnprintf(printk_buf, sizeof (printk_buf), fmt, args);
+ printed_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
if (!sal_console_port.sc_ops) {
- if (IS_RUNNING_ON_SIMULATOR())
- sal_console_port.sc_ops = &sim_ops;
- else
- sal_console_port.sc_ops = &poll_ops;
-
+ sal_console_port.sc_ops = &poll_ops;
early_sn_setup();
}
sal_console_port.sc_ops->sal_puts_raw(printk_buf, printed_len);
va_end(args);
return printed_len;
}
-#endif /* DEBUG */
+#endif /* DEBUG */
/*
* Interrupt handling routines.
*/
-
/**
* 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,
* we don't try to send characters to it...
*
*/
static void
-sn_receive_chars(struct sn_cons_port *port, struct pt_regs *regs)
+sn_receive_chars(struct sn_cons_port *port, struct pt_regs *regs,
+ unsigned long flags)
{
int ch;
struct tty_struct *tty;
"obtaining data from the console (0x%0x)\n", ch);
break;
}
-#if defined(CONFIG_SERIAL_SGI_L1_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
- if (uart_handle_sysrq_char(&port->sc_port, ch, regs))
- continue;
-#endif /* CONFIG_SERIAL_SGI_L1_CONSOLE && CONFIG_MAGIC_SYSRQ */
+#ifdef CONFIG_MAGIC_SYSRQ
+ if (sysrq_requested) {
+ unsigned long sysrq_timeout = sysrq_requested + HZ*5;
+
+ sysrq_requested = 0;
+ if (ch && time_before(jiffies, sysrq_timeout)) {
+ spin_unlock_irqrestore(&port->sc_port.lock, flags);
+ handle_sysrq(ch, regs, NULL);
+ spin_lock_irqsave(&port->sc_port.lock, flags);
+ /* ignore actual sysrq command char */
+ continue;
+ }
+ }
+ if (ch == *sysrq_serial_ptr) {
+ if (!(*++sysrq_serial_ptr)) {
+ sysrq_requested = jiffies;
+ sysrq_serial_ptr = sysrq_serial_str;
+ }
+ /*
+ * ignore the whole sysrq string except for the
+ * leading escape
+ */
+ if (ch != '\e')
+ continue;
+ }
+ else
+ sysrq_serial_ptr = sysrq_serial_str;
+#endif /* CONFIG_MAGIC_SYSRQ */
/* record the character to pass up to the tty layer */
if (tty) {
if (tty->flip.count == TTY_FLIPBUF_SIZE)
break;
}
- else {
- }
port->sc_port.icount.rx++;
}
* ignore them until we register with the serial core stuffs.
*
*/
-static void
-sn_transmit_chars(struct sn_cons_port *port, int raw)
+static void sn_transmit_chars(struct sn_cons_port *port, int raw)
{
int xmit_count, tail, head, loops, ii;
int result;
if (port->sc_port.info) {
/* We're initilized, using serial core infrastructure */
xmit = &port->sc_port.info->xmit;
- }
- else {
+ } else {
/* Probably sn_sal_switch_to_asynch has been run but serial core isn't
* initilized yet. Just return. Writes are going through
* sn_sal_console_write (due to register_console) at this time.
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, 0); /* no-op for us */
}
/**
* @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 pt_regs *regs)
{
- struct sn_cons_port *port = (struct sn_cons_port *) dev_id;
+ struct sn_cons_port *port = (struct sn_cons_port *)dev_id;
unsigned long flags;
int status = ia64_sn_console_intr_status();
spin_lock_irqsave(&port->sc_port.lock, flags);
if (status & SAL_CONSOLE_INTR_RECV) {
- sn_receive_chars(port, regs);
+ sn_receive_chars(port, regs, flags);
}
if (status & SAL_CONSOLE_INTR_XMIT) {
sn_transmit_chars(port, TRANSMIT_BUFFERED);
* returns the console irq if interrupt is successfully registered, else 0
*
*/
-static int
-sn_sal_connect_interrupt(struct sn_cons_port *port)
+static int sn_sal_connect_interrupt(struct sn_cons_port *port)
{
- if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt, SA_INTERRUPT,
+ if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt,
+ SA_INTERRUPT | SA_SHIRQ,
"SAL console driver", port) >= 0) {
return SGI_UART_VECTOR;
}
* Obviously not used in interrupt mode
*
*/
-static void
-sn_sal_timer_poll(unsigned long data)
+static void sn_sal_timer_poll(unsigned long data)
{
- struct sn_cons_port *port = (struct sn_cons_port *) data;
+ struct sn_cons_port *port = (struct sn_cons_port *)data;
unsigned long flags;
if (!port)
if (!port->sc_port.irq) {
spin_lock_irqsave(&port->sc_port.lock, flags);
- sn_receive_chars(port, NULL);
+ sn_receive_chars(port, NULL, flags);
sn_transmit_chars(port, TRANSMIT_RAW);
spin_unlock_irqrestore(&port->sc_port.lock, flags);
mod_timer(&port->sc_timer,
* if we didn't already come through here via sn_sal_serial_console_init.
*
*/
-static void __init
-sn_sal_switch_to_asynch(struct sn_cons_port *port)
+static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port)
{
unsigned long flags;
spin_lock_irqsave(&port->sc_port.lock, flags);
/* early_printk invocation may have done this for us */
- if (!port->sc_ops) {
- if (IS_RUNNING_ON_SIMULATOR())
- port->sc_ops = &sim_ops;
- else
- port->sc_ops = &poll_ops;
- }
+ if (!port->sc_ops)
+ port->sc_ops = &poll_ops;
/* we can't turn on the console interrupt (as request_irq
* calls kmalloc, which isn't set up yet), so we rely on a
*/
init_timer(&port->sc_timer);
port->sc_timer.function = sn_sal_timer_poll;
- port->sc_timer.data = (unsigned long) port;
+ port->sc_timer.data = (unsigned long)port;
if (IS_RUNNING_ON_SIMULATOR())
port->sc_interrupt_timeout = 6;
* We attempt to switch to interrupt mode here by calling
* sn_sal_connect_interrupt. If that works out, we enable receive interrupts.
*/
-static void __init
-sn_sal_switch_to_interrupts(struct sn_cons_port *port)
+static void __init sn_sal_switch_to_interrupts(struct sn_cons_port *port)
{
int irq;
unsigned long flags;
* Kernel console definitions
*/
-#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
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;
.write = sn_sal_console_write,
.device = uart_console_device,
.setup = sn_sal_console_setup,
- .index = -1, /* unspecified */
+ .index = -1, /* unspecified */
.data = &sal_console_uart,
};
#define SAL_CONSOLE &sal_console
-#else
-#define SAL_CONSOLE 0
-#endif /* CONFIG_SERIAL_SGI_L1_CONSOLE */
static struct uart_driver sal_console_uart = {
.owner = THIS_MODULE,
.driver_name = "sn_console",
.dev_name = DEVICE_NAME,
- .major = 0, /* major/minor set at registration time per USE_DYNAMIC_MINOR */
+ .major = 0, /* major/minor set at registration time per USE_DYNAMIC_MINOR */
.minor = 0,
- .nr = 1, /* one port */
+ .nr = 1, /* one port */
.cons = SAL_CONSOLE,
};
* core and try to enable interrupt driven mode.
*
*/
-static int __init
-sn_sal_module_init(void)
+static int __init sn_sal_module_init(void)
{
int retval;
- printk(KERN_INFO "sn_console: Console driver init\n");
-
if (!ia64_platform_is("sn2"))
return -ENODEV;
+ printk(KERN_INFO "sn_console: Console driver init\n");
+
if (USE_DYNAMIC_MINOR == 1) {
misc.minor = MISC_DYNAMIC_MINOR;
misc.name = DEVICE_NAME_DYNAMIC;
retval = misc_register(&misc);
if (retval != 0) {
- printk("Failed to register console device using misc_register.\n");
+ printk
+ ("Failed to register console device using misc_register.\n");
return -ENODEV;
}
sal_console_uart.major = MISC_MAJOR;
sal_console_uart.minor = misc.minor;
- }
- else {
+ } else {
sal_console_uart.major = DEVICE_MAJOR;
sal_console_uart.minor = DEVICE_MINOR;
}
/* We register the driver and the port before switching to interrupts
- * or async above so the proper uart structures are populated */
+ * or async above so the proper uart structures are populated */
if (uart_register_driver(&sal_console_uart) < 0) {
- printk("ERROR sn_sal_module_init failed uart_register_driver, line %d\n",
- __LINE__);
+ printk
+ ("ERROR sn_sal_module_init failed uart_register_driver, line %d\n",
+ __LINE__);
return -ENODEV;
}
- sal_console_port.sc_port.lock = SPIN_LOCK_UNLOCKED;
+ spin_lock_init(&sal_console_port.sc_port.lock);
/* Setup the port struct with the minimum needed */
sal_console_port.sc_port.membase = (char *)1; /* just needs to be non-zero */
* sn_sal_module_exit - When we're unloaded, remove the driver/port
*
*/
-static void __exit
-sn_sal_module_exit(void)
+static void __exit sn_sal_module_exit(void)
{
del_timer_sync(&sal_console_port.sc_timer);
uart_remove_one_port(&sal_console_uart, &sal_console_port.sc_port);
module_init(sn_sal_module_init);
module_exit(sn_sal_module_exit);
-#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
-
/**
* puts_raw_fixed - sn_sal_console_write helper for adding \r's as required
* @puts_raw : puts function to do the writing
*
*/
-static void puts_raw_fixed(int (*puts_raw) (const char *s, int len), const char *s, int count)
+static void puts_raw_fixed(int (*puts_raw) (const char *s, int len),
+ const char *s, int count)
{
const char *s1;
if (port->sc_port.info) {
/* somebody really wants this output, might be an
- * oops, kdb, panic, etc. make sure they get it. */
+ * 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 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
+ * 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.
- */
+ * 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 (!spin_is_locked(&port->sc_port.lock)
+ || stole_lock) {
if (!stole_lock) {
- spin_lock_irqsave(&port->sc_port.lock, flags);
+ spin_lock_irqsave(&port->
+ sc_port.lock,
+ flags);
got_lock = 1;
}
break;
- }
- else {
+ } 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;
+ 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;
}
}
/* 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);
+ spin_unlock_irqrestore(&port->sc_port.lock,
+ flags);
stole_lock = 0;
- }
- else {
+ } else {
/* fell thru */
stole_lock = 1;
}
puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
- }
- else {
+ } else {
stole_lock = 0;
#endif
spin_lock_irqsave(&port->sc_port.lock, flags);
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)
}
+#endif
}
else {
/* Not yet registered with serial core - simple case */
* here so providing it is easier.
*
*/
-static int __init
-sn_sal_console_setup(struct console *co, char *options)
+static int __init sn_sal_console_setup(struct console *co, char *options)
{
return 0;
}
.name = "sn_sal",
.write = sn_sal_console_write_early,
.flags = CON_PRINTBUFFER,
- .index = -1,
+ .index = -1,
};
/**
* sn_sal_serial_console_init is called, this console is unregistered
* and a new one registered.
*/
-int __init
-sn_serial_console_early_setup(void)
+int __init sn_serial_console_early_setup(void)
{
if (!ia64_platform_is("sn2"))
return -1;
- if (IS_RUNNING_ON_SIMULATOR())
- sal_console_port.sc_ops = &sim_ops;
- else
- sal_console_port.sc_ops = &poll_ops;
-
- early_sn_setup(); /* Find SAL entry points */
+ sal_console_port.sc_ops = &poll_ops;
+ early_sn_setup(); /* Find SAL entry points */
register_console(&sal_console_early);
return 0;
}
-
/**
* sn_sal_serial_console_init - Early console output - set up for register
*
* it here doesn't hurt anything.
*
*/
-static int __init
-sn_sal_serial_console_init(void)
+static int __init sn_sal_serial_console_init(void)
{
if (ia64_platform_is("sn2")) {
sn_sal_switch_to_asynch(&sal_console_port);
- DPRINTF ("sn_sal_serial_console_init : register console\n");
+ DPRINTF("sn_sal_serial_console_init : register console\n");
register_console(&sal_console);
unregister_console(&sal_console_early);
}
}
console_initcall(sn_sal_serial_console_init);
-
-#endif /* CONFIG_SERIAL_SGI_L1_CONSOLE */
git://git.onelab.eu / linux-2.6.git / blobdiff