^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) 2001 Keith M Wesolowski
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2001 Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2003 Guido Guenther <agx@sigxcpu.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/rtc/ds1685.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/wbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/ip32/mace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/ip32/crime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/ip32/ip32_ints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define POWERDOWN_TIMEOUT 120
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Blink frequency during reboot grace period and when panicked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define POWERDOWN_FREQ (HZ / 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define PANIC_FREQ (HZ / 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern struct platform_device ip32_rtc_device;
^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;
^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) static int has_panicked, shutting_down;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static __noreturn void ip32_poweroff(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) void (*poweroff_func)(struct platform_device *) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) symbol_get(ds1685_rtc_poweroff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #ifdef CONFIG_MODULES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* If the first __symbol_get failed, our module wasn't loaded. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (!poweroff_func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) request_module("rtc-ds1685");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) poweroff_func = symbol_get(ds1685_rtc_poweroff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!poweroff_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pr_emerg("RTC not available for power-off. Spinning forever ...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) (*poweroff_func)((struct platform_device *)data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) symbol_put(ds1685_rtc_poweroff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unreachable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static void ip32_machine_restart(char *cmd) __noreturn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static void ip32_machine_restart(char *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) crime->control = CRIME_CONTROL_HARD_RESET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unreachable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static void blink_timeout(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned long led = mace->perif.ctrl.misc ^ MACEISA_LED_RED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) mace->perif.ctrl.misc = led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) mod_timer(&blink_timer, jiffies + blink_timer_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static void ip32_machine_halt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ip32_poweroff(&ip32_rtc_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static void power_timeout(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ip32_poweroff(&ip32_rtc_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) void ip32_prepare_poweroff(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (has_panicked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (shutting_down || kill_cad_pid(SIGINT, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* No init process or button pressed twice. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ip32_poweroff(&ip32_rtc_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) shutting_down = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) blink_timer_timeout = POWERDOWN_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) blink_timeout(&blink_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) timer_setup(&power_timer, power_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) add_timer(&power_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int panic_event(struct notifier_block *this, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) unsigned long led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (has_panicked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) has_panicked = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* turn off the green LED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) led = mace->perif.ctrl.misc | MACEISA_LED_GREEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) mace->perif.ctrl.misc = led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) blink_timer_timeout = PANIC_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) blink_timeout(&blink_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static struct notifier_block panic_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .notifier_call = panic_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static __init int ip32_reboot_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* turn on the green led only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned long led = mace->perif.ctrl.misc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) led |= MACEISA_LED_RED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) led &= ~MACEISA_LED_GREEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) mace->perif.ctrl.misc = led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) _machine_restart = ip32_machine_restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) _machine_halt = ip32_machine_halt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) pm_power_off = ip32_machine_halt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) timer_setup(&blink_timer, blink_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) subsys_initcall(ip32_reboot_setup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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