Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c
new file mode 100644
index 0000000..ed5c60a
--- /dev/null
+++ b/arch/mips/sgi-ip22/ip22-reset.c
@@ -0,0 +1,247 @@
+/*
+ * 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);
