^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1997, 1998, 2001, 03, 05, 06 by Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/rtc/ds1286.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/sgialib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/sgi/ioc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/sgi/hpc3.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/sgi/mc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/sgi/ip22.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Just powerdown if init hasn't done after POWERDOWN_TIMEOUT seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * I'm not sure if this feature is a good idea, for now it's here just to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * make the power button make behave just like under IRIX.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define POWERDOWN_TIMEOUT 120
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Blink frequency during reboot grace period and when panicked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define POWERDOWN_FREQ (HZ / 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define PANIC_FREQ (HZ / 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static struct timer_list power_timer, blink_timer, debounce_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static unsigned long blink_timer_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define MACHINE_PANICED 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MACHINE_SHUTTING_DOWN 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int machine_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static void __noreturn sgi_machine_power_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned int tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* Disable watchdog */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) tmp = hpc3c0->rtcregs[RTC_CMD] & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) hpc3c0->rtcregs[RTC_CMD] = tmp | RTC_WAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) hpc3c0->rtcregs[RTC_WSEC] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) hpc3c0->rtcregs[RTC_WHSEC] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) sgioc->panel = ~SGIOC_PANEL_POWERON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Good bye cruel world ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* If we're still running, we probably got sent an alarm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) interrupt. Read the flag to clear it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) tmp = hpc3c0->rtcregs[RTC_HOURS_ALARM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void __noreturn sgi_machine_restart(char *command)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (machine_state & MACHINE_SHUTTING_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) sgi_machine_power_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void __noreturn sgi_machine_halt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (machine_state & MACHINE_SHUTTING_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) sgi_machine_power_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ArcEnterInteractiveMode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static void power_timeout(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) sgi_machine_power_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static void blink_timeout(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* XXX fix this for fullhouse */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sgi_ioc_reset ^= (SGIOC_RESET_LC0OFF|SGIOC_RESET_LC1OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) sgioc->reset = sgi_ioc_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) mod_timer(&blink_timer, jiffies + blink_timer_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static void debounce(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) del_timer(&debounce_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (sgint->istat1 & SGINT_ISTAT1_PWR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Interrupt still being sent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) debounce_timer.expires = jiffies + (HZ / 20); /* 0.05s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) add_timer(&debounce_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) SGIOC_PANEL_VOLDNINTR | SGIOC_PANEL_VOLDNHOLD |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) SGIOC_PANEL_VOLUPINTR | SGIOC_PANEL_VOLUPHOLD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (machine_state & MACHINE_PANICED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) enable_irq(SGI_PANEL_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static inline void power_button(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (machine_state & MACHINE_PANICED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if ((machine_state & MACHINE_SHUTTING_DOWN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) kill_cad_pid(SIGINT, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* No init process or button pressed twice. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) sgi_machine_power_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) machine_state |= MACHINE_SHUTTING_DOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) blink_timer_timeout = POWERDOWN_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) blink_timeout(&blink_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) timer_setup(&power_timer, power_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) add_timer(&power_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static irqreturn_t panel_int(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) unsigned int buttons;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) buttons = sgioc->panel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (sgint->istat1 & SGINT_ISTAT1_PWR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* Wait until interrupt goes away */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) disable_irq_nosync(SGI_PANEL_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) timer_setup(&debounce_timer, debounce, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) debounce_timer.expires = jiffies + 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) add_timer(&debounce_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Power button was pressed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * ioc.ps page 22: "The Panel Register is called Power Control by Full
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * House. Only lowest 2 bits are used. Guiness uses upper four bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * for volume control". This is not true, all bits are pulled high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * on fullhouse */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (!(buttons & SGIOC_PANEL_POWERINTR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) power_button();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static int panic_event(struct notifier_block *this, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (machine_state & MACHINE_PANICED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) machine_state |= MACHINE_PANICED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) blink_timer_timeout = PANIC_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) blink_timeout(&blink_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static struct notifier_block panic_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .notifier_call = panic_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static int __init reboot_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) _machine_restart = sgi_machine_restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) _machine_halt = sgi_machine_halt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) pm_power_off = sgi_machine_power_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) res = request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) printk(KERN_ERR "Allocation of front panel IRQ failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) timer_setup(&blink_timer, blink_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) subsys_initcall(reboot_setup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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