static int shutdown_thread_fn(void *data)
{
int ret;
struct mcu *mcu = glob_mcu;
while (!kthread_should_stop()) {
ret = i2c_smbus_read_byte_data(mcu->client, MCU_REG_CTRL);
if (ret < 0)
pr_err("MCU status reg read failed.\n");
mcu->reg_ctrl = ret;
if (mcu->reg_ctrl & MCU_CTRL_BTN) {
i2c_smbus_write_byte_data(mcu->client, MCU_REG_CTRL,
mcu->reg_ctrl & ~MCU_CTRL_BTN);
ctrl_alt_del();
}
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
}
return 0;
}
static irqreturn_t beat_reset_event(int virq, void *arg)
{
printk(KERN_DEBUG "Beat: reset button pressed\n");
beat_pm_poweroff_flag = 0;
ctrl_alt_del();
return IRQ_HANDLED;
}
static void dsmg600_power_handler(unsigned long data)
{
/* This routine is called twice per second to check the
* state of the power button.
*/
if (gpio_get_value(DSMG600_PB_GPIO)) {
/* IO Pin is 1 (button pushed) */
if (power_button_countdown > 0)
power_button_countdown--;
} else {
/* Done on button release, to allow for auto-power-on mods. */
if (power_button_countdown == 0) {
/* Signal init to do the ctrlaltdel action,
* this will bypass init if it hasn't started
* and do a kernel_restart.
*/
ctrl_alt_del();
/* Change the state of the power LED to "blink" */
gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
} else {
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
}
}
mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
}
/* Handler for quiesce event. Start shutdown procedure. */
static void
sclp_quiesce_handler(struct evbuf_header *evbuf)
{
_machine_restart = (void *) do_machine_quiesce;
_machine_halt = do_machine_quiesce;
_machine_power_off = do_machine_quiesce;
ctrl_alt_del();
}
static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
{
/*
*/
ctrl_alt_del();
return IRQ_HANDLED;
}
static irqreturn_t nas100d_reset_handler(int irq, void *dev_id, struct pt_regs *regs)
{
/* Signal init to do the ctrlaltdel action, this will bypass init if
* it hasn't started and do a kernel_restart.
*/
ctrl_alt_del();
return IRQ_HANDLED;
}
static irqreturn_t fsg_power_handler(int irq, void *dev_id)
{
/* Signal init to do the ctrlaltdel action, this will bypass init if
* it hasn't started and do a kernel_restart.
*/
ctrl_alt_del();
return IRQ_HANDLED;
}
static void boot_it(void)
{
extern int obp_system_intr(void);
if (!obp_system_intr())
ctrl_alt_del();
/* sigh.. attempt to prevent multiple entry */
last_keycode=1;
rep = 0;
}
static void power_button_poll(unsigned long dummy)
{
if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
ctrl_alt_del();
return;
}
power_button_poll_timer.expires = jiffies + (HZ / 10);
add_timer(&power_button_poll_timer);
}
/* Handler for quiesce event. Start shutdown procedure. */
static void sclp_quiesce_handler(struct evbuf_header *evbuf)
{
if (_machine_restart != (void *) do_machine_quiesce) {
old_machine_restart = _machine_restart;
old_machine_halt = _machine_halt;
old_machine_power_off = _machine_power_off;
_machine_restart = (void *) do_machine_quiesce;
_machine_halt = do_machine_quiesce;
_machine_power_off = do_machine_quiesce;
}
ctrl_alt_del();
}
static void shutdown_handler(struct xenbus_watch *watch,
const char **vec, unsigned int len)
{
extern void ctrl_alt_del(void);
char *str;
struct xenbus_transaction xbt;
int err, new_state = SHUTDOWN_INVALID;
if ((shutting_down != SHUTDOWN_INVALID) &&
(shutting_down != SHUTDOWN_RESUMING))
return;
again:
err = xenbus_transaction_start(&xbt);
if (err)
return;
str = (char *)xenbus_read(xbt, "control", "shutdown", NULL);
/* Ignore read errors and empty reads. */
if (XENBUS_IS_ERR_READ(str)) {
xenbus_transaction_end(xbt, 1);
return;
}
/*将其清空后，如果热迁移时suspend失败则会导致迁移挂死，去掉后suspend失败后则会迁移超时*/
//xenbus_write(xbt, "control", "shutdown", "");
err = xenbus_transaction_end(xbt, 0);
if (err == -EAGAIN) {
kfree(str);
goto again;
}
printk(KERN_WARNING "%s(%d): receive shutdown request %s\n", __FUNCTION__, __LINE__, str);
if (strcmp(str, "poweroff") == 0)
new_state = SHUTDOWN_POWEROFF;
else if (strcmp(str, "reboot") == 0)
ctrl_alt_del();
else if (strcmp(str, "suspend") == 0)
new_state = SHUTDOWN_SUSPEND;
else if (strcmp(str, "halt") == 0)
new_state = SHUTDOWN_HALT;
else
printk("Ignoring shutdown request: %s\n", str);
switch_shutdown_state(new_state);
kfree(str);
}
static void shutdown_handler(struct xenbus_watch *watch,
const char **vec, unsigned int len)
{
extern void ctrl_alt_del(void);
char *str;
struct xenbus_transaction xbt;
int err;
if (shutting_down != SHUTDOWN_INVALID)
return;
again:
err = xenbus_transaction_start(&xbt);
if (err)
return;
str = (char *)xenbus_read(xbt, "control", "shutdown", NULL);
/* Ignore read errors and empty reads. */
if (XENBUS_IS_ERR_READ(str)) {
xenbus_transaction_end(xbt, 1);
return;
}
xenbus_write(xbt, "control", "shutdown", "");
err = xenbus_transaction_end(xbt, 0);
if (err == -EAGAIN) {
kfree(str);
goto again;
}
if (strcmp(str, "poweroff") == 0)
shutting_down = SHUTDOWN_POWEROFF;
else if (strcmp(str, "reboot") == 0)
ctrl_alt_del();
else if (strcmp(str, "suspend") == 0)
shutting_down = SHUTDOWN_SUSPEND;
else if (strcmp(str, "halt") == 0)
shutting_down = SHUTDOWN_HALT;
else {
printk("Ignoring shutdown request: %s\n", str);
shutting_down = SHUTDOWN_INVALID;
}
if (shutting_down != SHUTDOWN_INVALID)
schedule_work(&shutdown_work);
kfree(str);
}
static void shutdown_handler(struct xenbus_watch *watch,
const char **vec, unsigned int len)
{
char *str;
struct xenbus_transaction xbt;
int err;
if (shutting_down != SHUTDOWN_INVALID)
return;
again:
err = xenbus_transaction_start(&xbt);
if (err)
return;
str = (char *)xenbus_read(xbt, "control", "shutdown", NULL);
/* Ignore read errors and empty reads. */
if (XENBUS_IS_ERR_READ(str)) {
xenbus_transaction_end(xbt, 1);
return;
}
xenbus_write(xbt, "control", "shutdown", "");
err = xenbus_transaction_end(xbt, 0);
if (err == -EAGAIN) {
kfree(str);
goto again;
}
if (strcmp(str, "poweroff") == 0 ||
strcmp(str, "halt") == 0) {
shutting_down = SHUTDOWN_POWEROFF;
orderly_poweroff(false);
} else if (strcmp(str, "reboot") == 0) {
shutting_down = SHUTDOWN_POWEROFF; /* ? */
ctrl_alt_del();
#ifdef CONFIG_PM_SLEEP
} else if (strcmp(str, "suspend") == 0) {
do_suspend();
#endif
} else {
printk(KERN_INFO "Ignoring shutdown request: %s\n", str);
shutting_down = SHUTDOWN_INVALID;
}
kfree(str);
}
static irqreturn_t gpio_interrupt(int irq, void *ignored)
{
int state;
if (!ssb_chipco_irq_status(&bcm47xx_bus.ssb.chipco,
SSB_CHIPCO_IRQ_GPIO))
return IRQ_NONE;
state = gpio_get_value(WGT634U_GPIO_RESET);
gpio_polarity(WGT634U_GPIO_RESET, state);
if (!state) {
printk(KERN_INFO "Reset button pressed");
ctrl_alt_del();
}
return IRQ_HANDLED;
}
static irqreturn_t gpio_interrupt(int irq, void *ignored)
{
int state;
/* Interrupts are shared, check if the current one is
a GPIO interrupt. */
if (!ssb_chipco_irq_status(&bcm47xx_bus.ssb.chipco,
SSB_CHIPCO_IRQ_GPIO))
return IRQ_NONE;
state = gpio_get_value(WGT634U_GPIO_RESET);
/* Interrupt are level triggered, revert the interrupt polarity
to clear the interrupt. */
gpio_polarity(WGT634U_GPIO_RESET, state);
if (!state) {
printk(KERN_INFO "Reset button pressed");
ctrl_alt_del();
}
return IRQ_HANDLED;
}
/*
* s390_machine_check_handler
*
* machine check handler, dequeueing machine check entries
* and processing them
*/
static int s390_machine_check_handler( void *parm)
{
struct semaphore *sem = parm;
unsigned long flags;
mache_t *pmache;
int found = 0;
/* set name to something sensible */
strcpy (current->comm, "kmcheck");
/* block all signals */
sigfillset(¤t->blocked);
#ifdef S390_MACHCHK_DEBUG
printk( KERN_NOTICE "mach_handler : ready\n");
#endif
do {
#ifdef S390_MACHCHK_DEBUG
printk( KERN_NOTICE "mach_handler : waiting for wakeup\n");
#endif
down_interruptible( sem );
#ifdef S390_MACHCHK_DEBUG
printk( KERN_NOTICE "\nmach_handler : wakeup ... \n");
#endif
found = 0; /* init ... */
__save_flags( flags );
__cli();
do {
pmache = s390_dequeue_mchchk();
if ( pmache )
{
found = 1;
if ( pmache->mcic.mcc.mcd.cp )
{
crwe_t *pcrwe_n;
crwe_t *pcrwe_h;
s390_do_crw_pending( pmache->mc.crwe );
pcrwe_h = pmache->mc.crwe;
pcrwe_n = pmache->mc.crwe->crwe_next;
pmache->mcic.mcc.mcd.cp = 0;
pmache->mc.crwe = NULL;
spin_lock( &crw_queue_lock);
while ( pcrwe_h )
{
pcrwe_h->crwe_next = crw_buffer_anchor;
crw_buffer_anchor = pcrwe_h;
pcrwe_h = pcrwe_n;
if ( pcrwe_h != NULL )
pcrwe_n = pcrwe_h->crwe_next;
} /* endwhile */
spin_unlock( &crw_queue_lock);
} /* endif */
#ifdef CONFIG_MACHCHK_WARNING
if ( pmache->mcic.mcc.mcd.w )
{
ctrl_alt_del(); // shutdown NOW!
#ifdef S390_MACHCHK_DEBUG
printk( KERN_DEBUG "mach_handler : kill -SIGPWR init\n");
#endif
} /* endif */
#endif
#ifdef CONFIG_MACHCHK_WARNING
if ( pmache->mcic.mcc.mcd.w )
{
ctrl_alt_del(); // shutdown NOW!
#ifdef S390_MACHCHK_DEBUG
printk( KERN_DEBUG "mach_handler : kill -SIGPWR init\n");
#endif
} /* endif */
#endif
s390_enqueue_free_mchchk( pmache );
}
else
{
// unconditional surrender ...
#ifdef S390_MACHCHK_DEBUG
printk( KERN_DEBUG "mach_handler : nothing to do, sleeping\n");
#endif
} /* endif */
} while ( pmache );
__restore_flags( flags );
} while ( 1 );
return( 0);
}
void keyboard_irq(int irq, struct pt_regs *regs, void *dev_id)
{
static unsigned int ModeState = 0;
static int E0Prefix = 0;
int code, mode, E0 = 0;
register char *keyp;
register char *IsReleasep;
code = inb_p((void *) KBD_IO);
mode = inb_p((void *) KBD_CTL);
/* Necessary for the XT. */
outb_p((unsigned char) (mode | 0x80), (void *) KBD_CTL);
outb_p((unsigned char) mode, (void *) KBD_CTL);
if (kraw) {
AddQueue((unsigned char) code);
return;
}
if (code == 0xE0) { /* Remember this has been received */
E0Prefix = 1;
return;
}
if (E0Prefix) {
E0 = 1;
E0Prefix = 0;
}
IsReleasep = (char *)(code & 0x80);
switch (code & 0x7F) {
case 29:
IsReleasep ? (ModeState &= ~CTRL) : (ModeState |= CTRL);
return;
case 42:
IsReleasep ? (ModeState &= ~LSHIFT) : (ModeState |= LSHIFT);
return;
case 54:
IsReleasep ? (ModeState &= ~RSHIFT) : (ModeState |= RSHIFT);
return;
case 56:
#if defined(CONFIG_KEYMAP_DE) || defined(CONFIG_KEYMAP_SE)
if (E0 == 0) {
IsReleasep ? (ModeState &= ~ALT) : (ModeState |= ALT);
} else {
IsReleasep ? (ModeState &= ~ALT_GR) : (ModeState |= ALT_GR);
}
#else
IsReleasep ? (ModeState &= ~ALT) : (ModeState |= ALT);
#endif
return;
case 58:
ModeState ^= IsReleasep ? 0 : CAPS;
return;
case 69:
ModeState ^= IsReleasep ? 0 : NUM;
return;
default:
if (IsReleasep)
return;
break;
}
/* Handle CTRL-ALT-DEL */
if ((code == 0x53) && (ModeState & CTRL) && (ModeState & ALT))
ctrl_alt_del();
/*
* Pick the right keymap
*/
if (ModeState & CAPS && !(ModeState & ANYSHIFT))
keyp = (char *) xtkb_scan_caps[code];
else if (ModeState & ANYSHIFT && !(ModeState & CAPS))
keyp = (char *) xtkb_scan_shifted[code];
/* added for belgian keyboard (Stefke) */
else if ((ModeState & CTRL) && (ModeState & ALT))
keyp = (char *) xtkb_scan_ctrl_alt[code];
/* end belgian */
/* added for German keyboard (Klaus Syttkus) */
else if (ModeState & ALT_GR)
keyp = (char *) xtkb_scan_ctrl_alt[code];
/* end German */
else
keyp = (char *) xtkb_scan[code];
if (ModeState & CTRL && code < 14 && !(ModeState & ALT))
keyp = (char *) xtkb_scan_shifted[code];
if (code < 70 && ModeState & NUM)
keyp = (char *) xtkb_scan_shifted[code];
/*
* Apply special modifiers
*/
if (ModeState & ALT && !(ModeState & CTRL)) /* Changed to support CTRL-ALT */
keyp = (char *)(((int) keyp) | 0x80); /* META-.. */
if (!keyp) /* non meta-@ is 64 */
keyp = (char *) '@';
if (ModeState & CTRL && !(ModeState & ALT)) /* Changed to support CTRL-ALT */
keyp = (char *)(((int) keyp) & 0x1F); /* CTRL-.. */
if (code < 0x45 && code > 0x3A) { /* F1 .. F10 */
#ifdef CONFIG_CONSOLE_DIRECT
if (ModeState & ALT) {
Console_set_vc((unsigned) (code - 0x3B));
return;
}
#endif
AddQueue(ESC);
AddQueue((unsigned char) (code - 0x3B + 'a'));
return;
}
if (E0) /* Is extended scancode */
switch (code) {
case 0x48: /* Arrow up */
AddQueue(ESC);
AddQueue('A');
return;
case 0x50: /* Arrow down */
AddQueue(ESC);
AddQueue('B');
return;
case 0x4D: /* Arrow right */
AddQueue(ESC);
AddQueue('C');
return;
case 0x4B: /* Arrow left */
AddQueue(ESC);
AddQueue('D');
return;
case 0x1c: /* keypad enter */
AddQueue('\n');
return;
}
if (((int)keyp) == '\r')
keyp = (char *) '\n';
AddQueue((unsigned char) keyp);
}
static void do_reboot(void)
{
shutting_down = SHUTDOWN_POWEROFF; /* ? */
ctrl_alt_del();
}
static void gcn_rsw_normal_reset(unsigned long dummy)
{
ctrl_alt_del();
}
static void boot_it(void)
{
ctrl_alt_del();
}