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path: root/kernel/power/tuxonice_power_off.c
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Diffstat (limited to 'kernel/power/tuxonice_power_off.c')
-rw-r--r--kernel/power/tuxonice_power_off.c286
1 files changed, 0 insertions, 286 deletions
diff --git a/kernel/power/tuxonice_power_off.c b/kernel/power/tuxonice_power_off.c
deleted file mode 100644
index 7c78773cf..000000000
--- a/kernel/power/tuxonice_power_off.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/*
- * kernel/power/tuxonice_power_off.c
- *
- * Copyright (C) 2006-2015 Nigel Cunningham (nigel at nigelcunningham com au)
- *
- * This file is released under the GPLv2.
- *
- * Support for powering down.
- */
-
-#include <linux/device.h>
-#include <linux/suspend.h>
-#include <linux/mm.h>
-#include <linux/pm.h>
-#include <linux/reboot.h>
-#include <linux/cpu.h>
-#include <linux/console.h>
-#include <linux/fs.h>
-#include "tuxonice.h"
-#include "tuxonice_ui.h"
-#include "tuxonice_power_off.h"
-#include "tuxonice_sysfs.h"
-#include "tuxonice_modules.h"
-#include "tuxonice_io.h"
-
-unsigned long toi_poweroff_method; /* 0 - Kernel power off */
-
-static int wake_delay;
-static char lid_state_file[256], wake_alarm_dir[256];
-static struct file *lid_file, *alarm_file, *epoch_file;
-static int post_wake_state = -1;
-
-static int did_suspend_to_both;
-
-/*
- * __toi_power_down
- * Functionality : Powers down or reboots the computer once the image
- * has been written to disk.
- * Key Assumptions : Able to reboot/power down via code called or that
- * the warning emitted if the calls fail will be visible
- * to the user (ie printk resumes devices).
- */
-
-static void __toi_power_down(int method)
-{
- int error;
-
- toi_cond_pause(1, test_action_state(TOI_REBOOT) ? "Ready to reboot." :
- "Powering down.");
-
- if (test_result_state(TOI_ABORTED))
- goto out;
-
- if (test_action_state(TOI_REBOOT))
- kernel_restart(NULL);
-
- switch (method) {
- case 0:
- break;
- case 3:
- /*
- * Re-read the overwritten part of pageset2 to make post-resume
- * faster.
- */
- if (read_pageset2(1))
- panic("Attempt to reload pagedir 2 failed. "
- "Try rebooting.");
-
- pm_prepare_console();
-
- error = pm_notifier_call_chain(PM_SUSPEND_PREPARE);
- if (!error) {
- pm_restore_gfp_mask();
- error = suspend_devices_and_enter(PM_SUSPEND_MEM);
- pm_restrict_gfp_mask();
- if (!error)
- did_suspend_to_both = 1;
- }
- pm_notifier_call_chain(PM_POST_SUSPEND);
- pm_restore_console();
-
- /* Success - we're now post-resume-from-ram */
- if (did_suspend_to_both)
- return;
-
- /* Failed to suspend to ram - do normal power off */
- break;
- case 4:
- /*
- * If succeeds, doesn't return. If fails, do a simple
- * powerdown.
- */
- hibernation_platform_enter();
- break;
- case 5:
- /* Historic entry only now */
- break;
- }
-
- if (method && method != 5)
- toi_cond_pause(1,
- "Falling back to alternate power off method.");
-
- if (test_result_state(TOI_ABORTED))
- goto out;
-
- if (pm_power_off)
- kernel_power_off();
- kernel_halt();
- toi_cond_pause(1, "Powerdown failed.");
- while (1)
- cpu_relax();
-
-out:
- if (read_pageset2(1))
- panic("Attempt to reload pagedir 2 failed. Try rebooting.");
- return;
-}
-
-#define CLOSE_FILE(file) \
- if (file) { \
- filp_close(file, NULL); file = NULL; \
- }
-
-static void powerdown_cleanup(int toi_or_resume)
-{
- if (!toi_or_resume)
- return;
-
- CLOSE_FILE(lid_file);
- CLOSE_FILE(alarm_file);
- CLOSE_FILE(epoch_file);
-}
-
-static void open_file(char *format, char *arg, struct file **var, int mode,
- char *desc)
-{
- char buf[256];
-
- if (strlen(arg)) {
- sprintf(buf, format, arg);
- *var = filp_open(buf, mode, 0);
- if (IS_ERR(*var) || !*var) {
- printk(KERN_INFO "Failed to open %s file '%s' (%p).\n",
- desc, buf, *var);
- *var = NULL;
- }
- }
-}
-
-static int powerdown_init(int toi_or_resume)
-{
- if (!toi_or_resume)
- return 0;
-
- did_suspend_to_both = 0;
-
- open_file("/proc/acpi/button/%s/state", lid_state_file, &lid_file,
- O_RDONLY, "lid");
-
- if (strlen(wake_alarm_dir)) {
- open_file("/sys/class/rtc/%s/wakealarm", wake_alarm_dir,
- &alarm_file, O_WRONLY, "alarm");
-
- open_file("/sys/class/rtc/%s/since_epoch", wake_alarm_dir,
- &epoch_file, O_RDONLY, "epoch");
- }
-
- return 0;
-}
-
-static int lid_closed(void)
-{
- char array[25];
- ssize_t size;
- loff_t pos = 0;
-
- if (!lid_file)
- return 0;
-
- size = vfs_read(lid_file, (char __user *) array, 25, &pos);
- if ((int) size < 1) {
- printk(KERN_INFO "Failed to read lid state file (%d).\n",
- (int) size);
- return 0;
- }
-
- if (!strcmp(array, "state: closed\n"))
- return 1;
-
- return 0;
-}
-
-static void write_alarm_file(int value)
-{
- ssize_t size;
- char buf[40];
- loff_t pos = 0;
-
- if (!alarm_file)
- return;
-
- sprintf(buf, "%d\n", value);
-
- size = vfs_write(alarm_file, (char __user *)buf, strlen(buf), &pos);
-
- if (size < 0)
- printk(KERN_INFO "Error %d writing alarm value %s.\n",
- (int) size, buf);
-}
-
-/**
- * toi_check_resleep: See whether to powerdown again after waking.
- *
- * After waking, check whether we should powerdown again in a (usually
- * different) way. We only do this if the lid switch is still closed.
- */
-void toi_check_resleep(void)
-{
- /* We only return if we suspended to ram and woke. */
- if (lid_closed() && post_wake_state >= 0)
- __toi_power_down(post_wake_state);
-}
-
-void toi_power_down(void)
-{
- if (alarm_file && wake_delay) {
- char array[25];
- loff_t pos = 0;
- size_t size = vfs_read(epoch_file, (char __user *) array, 25,
- &pos);
-
- if (((int) size) < 1)
- printk(KERN_INFO "Failed to read epoch file (%d).\n",
- (int) size);
- else {
- unsigned long since_epoch;
- if (!kstrtoul(array, 0, &since_epoch)) {
- /* Clear any wakeup time. */
- write_alarm_file(0);
-
- /* Set new wakeup time. */
- write_alarm_file(since_epoch + wake_delay);
- }
- }
- }
-
- __toi_power_down(toi_poweroff_method);
-
- toi_check_resleep();
-}
-
-static struct toi_sysfs_data sysfs_params[] = {
-#if defined(CONFIG_ACPI)
- SYSFS_STRING("lid_file", SYSFS_RW, lid_state_file, 256, 0, NULL),
- SYSFS_INT("wake_delay", SYSFS_RW, &wake_delay, 0, INT_MAX, 0, NULL),
- SYSFS_STRING("wake_alarm_dir", SYSFS_RW, wake_alarm_dir, 256, 0, NULL),
- SYSFS_INT("post_wake_state", SYSFS_RW, &post_wake_state, -1, 5, 0,
- NULL),
- SYSFS_UL("powerdown_method", SYSFS_RW, &toi_poweroff_method, 0, 5, 0),
- SYSFS_INT("did_suspend_to_both", SYSFS_READONLY, &did_suspend_to_both,
- 0, 0, 0, NULL)
-#endif
-};
-
-static struct toi_module_ops powerdown_ops = {
- .type = MISC_HIDDEN_MODULE,
- .name = "poweroff",
- .initialise = powerdown_init,
- .cleanup = powerdown_cleanup,
- .directory = "[ROOT]",
- .module = THIS_MODULE,
- .sysfs_data = sysfs_params,
- .num_sysfs_entries = sizeof(sysfs_params) /
- sizeof(struct toi_sysfs_data),
-};
-
-int toi_poweroff_init(void)
-{
- return toi_register_module(&powerdown_ops);
-}
-
-void toi_poweroff_exit(void)
-{
- toi_unregister_module(&powerdown_ops);
-}
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