248 lines
6.1 KiB
C
248 lines
6.1 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1997, 1998, 2001, 2003 by Ralf Baechle
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/ds1286.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/timer.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/system.h>
|
|
#include <asm/reboot.h>
|
|
#include <asm/sgialib.h>
|
|
#include <asm/sgi/ioc.h>
|
|
#include <asm/sgi/hpc3.h>
|
|
#include <asm/sgi/mc.h>
|
|
#include <asm/sgi/ip22.h>
|
|
|
|
/*
|
|
* Just powerdown if init hasn't done after POWERDOWN_TIMEOUT seconds.
|
|
* I'm not sure if this feature is a good idea, for now it's here just to
|
|
* make the power button make behave just like under IRIX.
|
|
*/
|
|
#define POWERDOWN_TIMEOUT 120
|
|
|
|
/*
|
|
* Blink frequency during reboot grace period and when paniced.
|
|
*/
|
|
#define POWERDOWN_FREQ (HZ / 4)
|
|
#define PANIC_FREQ (HZ / 8)
|
|
|
|
static struct timer_list power_timer, blink_timer, debounce_timer, volume_timer;
|
|
|
|
#define MACHINE_PANICED 1
|
|
#define MACHINE_SHUTTING_DOWN 2
|
|
static int machine_state = 0;
|
|
|
|
static void sgi_machine_restart(char *command) __attribute__((noreturn));
|
|
static void sgi_machine_halt(void) __attribute__((noreturn));
|
|
static void sgi_machine_power_off(void) __attribute__((noreturn));
|
|
|
|
static void sgi_machine_restart(char *command)
|
|
{
|
|
if (machine_state & MACHINE_SHUTTING_DOWN)
|
|
sgi_machine_power_off();
|
|
sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
|
|
while (1);
|
|
}
|
|
|
|
static void sgi_machine_halt(void)
|
|
{
|
|
if (machine_state & MACHINE_SHUTTING_DOWN)
|
|
sgi_machine_power_off();
|
|
ArcEnterInteractiveMode();
|
|
}
|
|
|
|
static void sgi_machine_power_off(void)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
local_irq_disable();
|
|
|
|
/* Disable watchdog */
|
|
tmp = hpc3c0->rtcregs[RTC_CMD] & 0xff;
|
|
hpc3c0->rtcregs[RTC_CMD] = tmp | RTC_WAM;
|
|
hpc3c0->rtcregs[RTC_WSEC] = 0;
|
|
hpc3c0->rtcregs[RTC_WHSEC] = 0;
|
|
|
|
while (1) {
|
|
sgioc->panel = ~SGIOC_PANEL_POWERON;
|
|
/* Good bye cruel world ... */
|
|
|
|
/* If we're still running, we probably got sent an alarm
|
|
interrupt. Read the flag to clear it. */
|
|
tmp = hpc3c0->rtcregs[RTC_HOURS_ALARM];
|
|
}
|
|
}
|
|
|
|
static void power_timeout(unsigned long data)
|
|
{
|
|
sgi_machine_power_off();
|
|
}
|
|
|
|
static void blink_timeout(unsigned long data)
|
|
{
|
|
/* XXX fix this for fullhouse */
|
|
sgi_ioc_reset ^= (SGIOC_RESET_LC0OFF|SGIOC_RESET_LC1OFF);
|
|
sgioc->reset = sgi_ioc_reset;
|
|
|
|
mod_timer(&blink_timer, jiffies+data);
|
|
}
|
|
|
|
static void debounce(unsigned long data)
|
|
{
|
|
del_timer(&debounce_timer);
|
|
if (sgint->istat1 & SGINT_ISTAT1_PWR) {
|
|
/* Interrupt still being sent. */
|
|
debounce_timer.expires = jiffies + 5; /* 0.05s */
|
|
add_timer(&debounce_timer);
|
|
|
|
sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR |
|
|
SGIOC_PANEL_VOLDNINTR | SGIOC_PANEL_VOLDNHOLD |
|
|
SGIOC_PANEL_VOLUPINTR | SGIOC_PANEL_VOLUPHOLD;
|
|
|
|
return;
|
|
}
|
|
|
|
if (machine_state & MACHINE_PANICED)
|
|
sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
|
|
|
|
enable_irq(SGI_PANEL_IRQ);
|
|
}
|
|
|
|
static inline void power_button(void)
|
|
{
|
|
if (machine_state & MACHINE_PANICED)
|
|
return;
|
|
|
|
if ((machine_state & MACHINE_SHUTTING_DOWN) || kill_proc(1,SIGINT,1)) {
|
|
/* No init process or button pressed twice. */
|
|
sgi_machine_power_off();
|
|
}
|
|
|
|
machine_state |= MACHINE_SHUTTING_DOWN;
|
|
blink_timer.data = POWERDOWN_FREQ;
|
|
blink_timeout(POWERDOWN_FREQ);
|
|
|
|
init_timer(&power_timer);
|
|
power_timer.function = power_timeout;
|
|
power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
|
|
add_timer(&power_timer);
|
|
}
|
|
|
|
void (*indy_volume_button)(int) = NULL;
|
|
|
|
EXPORT_SYMBOL(indy_volume_button);
|
|
|
|
static inline void volume_up_button(unsigned long data)
|
|
{
|
|
del_timer(&volume_timer);
|
|
|
|
if (indy_volume_button)
|
|
indy_volume_button(1);
|
|
|
|
if (sgint->istat1 & SGINT_ISTAT1_PWR) {
|
|
volume_timer.expires = jiffies + 1;
|
|
add_timer(&volume_timer);
|
|
}
|
|
}
|
|
|
|
static inline void volume_down_button(unsigned long data)
|
|
{
|
|
del_timer(&volume_timer);
|
|
|
|
if (indy_volume_button)
|
|
indy_volume_button(-1);
|
|
|
|
if (sgint->istat1 & SGINT_ISTAT1_PWR) {
|
|
volume_timer.expires = jiffies + 1;
|
|
add_timer(&volume_timer);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t panel_int(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
unsigned int buttons;
|
|
|
|
buttons = sgioc->panel;
|
|
sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR;
|
|
|
|
if (sgint->istat1 & SGINT_ISTAT1_PWR) {
|
|
/* Wait until interrupt goes away */
|
|
disable_irq(SGI_PANEL_IRQ);
|
|
init_timer(&debounce_timer);
|
|
debounce_timer.function = debounce;
|
|
debounce_timer.expires = jiffies + 5;
|
|
add_timer(&debounce_timer);
|
|
}
|
|
|
|
/* Power button was pressed
|
|
* ioc.ps page 22: "The Panel Register is called Power Control by Full
|
|
* House. Only lowest 2 bits are used. Guiness uses upper four bits
|
|
* for volume control". This is not true, all bits are pulled high
|
|
* on fullhouse */
|
|
if (ip22_is_fullhouse() || !(buttons & SGIOC_PANEL_POWERINTR)) {
|
|
power_button();
|
|
return IRQ_HANDLED;
|
|
}
|
|
/* TODO: mute/unmute */
|
|
/* Volume up button was pressed */
|
|
if (!(buttons & SGIOC_PANEL_VOLUPINTR)) {
|
|
init_timer(&volume_timer);
|
|
volume_timer.function = volume_up_button;
|
|
volume_timer.expires = jiffies + 1;
|
|
add_timer(&volume_timer);
|
|
}
|
|
/* Volume down button was pressed */
|
|
if (!(buttons & SGIOC_PANEL_VOLDNINTR)) {
|
|
init_timer(&volume_timer);
|
|
volume_timer.function = volume_down_button;
|
|
volume_timer.expires = jiffies + 1;
|
|
add_timer(&volume_timer);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int panic_event(struct notifier_block *this, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
if (machine_state & MACHINE_PANICED)
|
|
return NOTIFY_DONE;
|
|
machine_state |= MACHINE_PANICED;
|
|
|
|
blink_timer.data = PANIC_FREQ;
|
|
blink_timeout(PANIC_FREQ);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block panic_block = {
|
|
.notifier_call = panic_event,
|
|
};
|
|
|
|
static int __init reboot_setup(void)
|
|
{
|
|
_machine_restart = sgi_machine_restart;
|
|
_machine_halt = sgi_machine_halt;
|
|
_machine_power_off = sgi_machine_power_off;
|
|
|
|
request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL);
|
|
init_timer(&blink_timer);
|
|
blink_timer.function = blink_timeout;
|
|
notifier_chain_register(&panic_notifier_list, &panic_block);
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(reboot_setup);
|