diff options
Diffstat (limited to 'drivers/acpi/sleep')
-rw-r--r-- | drivers/acpi/sleep/Makefile | 5 | ||||
-rw-r--r-- | drivers/acpi/sleep/main.c | 696 | ||||
-rw-r--r-- | drivers/acpi/sleep/proc.c | 526 | ||||
-rw-r--r-- | drivers/acpi/sleep/sleep.h | 7 | ||||
-rw-r--r-- | drivers/acpi/sleep/wakeup.c | 173 |
5 files changed, 1407 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/Makefile b/drivers/acpi/sleep/Makefile new file mode 100644 index 0000000..f1fb888 --- /dev/null +++ b/drivers/acpi/sleep/Makefile @@ -0,0 +1,5 @@ +obj-y := wakeup.o +obj-y += main.o +obj-$(CONFIG_ACPI_SLEEP) += proc.o + +EXTRA_CFLAGS += $(ACPI_CFLAGS) diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c new file mode 100644 index 0000000..28a691c --- /dev/null +++ b/drivers/acpi/sleep/main.c @@ -0,0 +1,696 @@ +/* + * sleep.c - ACPI sleep support. + * + * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> + * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> + * Copyright (c) 2000-2003 Patrick Mochel + * Copyright (c) 2003 Open Source Development Lab + * + * This file is released under the GPLv2. + * + */ + +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/dmi.h> +#include <linux/device.h> +#include <linux/suspend.h> +#include <linux/reboot.h> + +#include <asm/io.h> + +#include <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.h> +#include "sleep.h" + +u8 sleep_states[ACPI_S_STATE_COUNT]; + +static void acpi_sleep_tts_switch(u32 acpi_state) +{ + union acpi_object in_arg = { ACPI_TYPE_INTEGER }; + struct acpi_object_list arg_list = { 1, &in_arg }; + acpi_status status = AE_OK; + + in_arg.integer.value = acpi_state; + status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + /* + * OS can't evaluate the _TTS object correctly. Some warning + * message will be printed. But it won't break anything. + */ + printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); + } +} + +static int tts_notify_reboot(struct notifier_block *this, + unsigned long code, void *x) +{ + acpi_sleep_tts_switch(ACPI_STATE_S5); + return NOTIFY_DONE; +} + +static struct notifier_block tts_notifier = { + .notifier_call = tts_notify_reboot, + .next = NULL, + .priority = 0, +}; + +static int acpi_sleep_prepare(u32 acpi_state) +{ +#ifdef CONFIG_ACPI_SLEEP + /* do we have a wakeup address for S2 and S3? */ + if (acpi_state == ACPI_STATE_S3) { + if (!acpi_wakeup_address) { + return -EFAULT; + } + acpi_set_firmware_waking_vector( + (acpi_physical_address)acpi_wakeup_address); + + } + ACPI_FLUSH_CPU_CACHE(); + acpi_enable_wakeup_device_prep(acpi_state); +#endif + printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", + acpi_state); + acpi_enter_sleep_state_prep(acpi_state); + return 0; +} + +#ifdef CONFIG_ACPI_SLEEP +static u32 acpi_target_sleep_state = ACPI_STATE_S0; +/* + * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the + * user to request that behavior by using the 'acpi_old_suspend_ordering' + * kernel command line option that causes the following variable to be set. + */ +static bool old_suspend_ordering; + +void __init acpi_old_suspend_ordering(void) +{ + old_suspend_ordering = true; +} + +/* + * According to the ACPI specification the BIOS should make sure that ACPI is + * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still, + * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI + * on such systems during resume. Unfortunately that doesn't help in + * particularly pathological cases in which SCI_EN has to be set directly on + * resume, although the specification states very clearly that this flag is + * owned by the hardware. The set_sci_en_on_resume variable will be set in such + * cases. + */ +static bool set_sci_en_on_resume; + +/** + * acpi_pm_disable_gpes - Disable the GPEs. + */ +static int acpi_pm_disable_gpes(void) +{ + acpi_hw_disable_all_gpes(); + return 0; +} + +/** + * __acpi_pm_prepare - Prepare the platform to enter the target state. + * + * If necessary, set the firmware waking vector and do arch-specific + * nastiness to get the wakeup code to the waking vector. + */ +static int __acpi_pm_prepare(void) +{ + int error = acpi_sleep_prepare(acpi_target_sleep_state); + + if (error) + acpi_target_sleep_state = ACPI_STATE_S0; + return error; +} + +/** + * acpi_pm_prepare - Prepare the platform to enter the target sleep + * state and disable the GPEs. + */ +static int acpi_pm_prepare(void) +{ + int error = __acpi_pm_prepare(); + + if (!error) + acpi_hw_disable_all_gpes(); + return error; +} + +/** + * acpi_pm_finish - Instruct the platform to leave a sleep state. + * + * This is called after we wake back up (or if entering the sleep state + * failed). + */ +static void acpi_pm_finish(void) +{ + u32 acpi_state = acpi_target_sleep_state; + + if (acpi_state == ACPI_STATE_S0) + return; + + printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", + acpi_state); + acpi_disable_wakeup_device(acpi_state); + acpi_leave_sleep_state(acpi_state); + + /* reset firmware waking vector */ + acpi_set_firmware_waking_vector((acpi_physical_address) 0); + + acpi_target_sleep_state = ACPI_STATE_S0; +} + +/** + * acpi_pm_end - Finish up suspend sequence. + */ +static void acpi_pm_end(void) +{ + /* + * This is necessary in case acpi_pm_finish() is not called during a + * failing transition to a sleep state. + */ + acpi_target_sleep_state = ACPI_STATE_S0; + acpi_sleep_tts_switch(acpi_target_sleep_state); +} +#else /* !CONFIG_ACPI_SLEEP */ +#define acpi_target_sleep_state ACPI_STATE_S0 +#endif /* CONFIG_ACPI_SLEEP */ + +#ifdef CONFIG_SUSPEND +extern void do_suspend_lowlevel(void); + +static u32 acpi_suspend_states[] = { + [PM_SUSPEND_ON] = ACPI_STATE_S0, + [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, + [PM_SUSPEND_MEM] = ACPI_STATE_S3, + [PM_SUSPEND_MAX] = ACPI_STATE_S5 +}; + +/** + * acpi_suspend_begin - Set the target system sleep state to the state + * associated with given @pm_state, if supported. + */ +static int acpi_suspend_begin(suspend_state_t pm_state) +{ + u32 acpi_state = acpi_suspend_states[pm_state]; + int error = 0; + + if (sleep_states[acpi_state]) { + acpi_target_sleep_state = acpi_state; + acpi_sleep_tts_switch(acpi_target_sleep_state); + } else { + printk(KERN_ERR "ACPI does not support this state: %d\n", + pm_state); + error = -ENOSYS; + } + return error; +} + +/** + * acpi_suspend_enter - Actually enter a sleep state. + * @pm_state: ignored + * + * Flush caches and go to sleep. For STR we have to call arch-specific + * assembly, which in turn call acpi_enter_sleep_state(). + * It's unfortunate, but it works. Please fix if you're feeling frisky. + */ +static int acpi_suspend_enter(suspend_state_t pm_state) +{ + acpi_status status = AE_OK; + unsigned long flags = 0; + u32 acpi_state = acpi_target_sleep_state; + + ACPI_FLUSH_CPU_CACHE(); + + /* Do arch specific saving of state. */ + if (acpi_state == ACPI_STATE_S3) { + int error = acpi_save_state_mem(); + + if (error) + return error; + } + + local_irq_save(flags); + acpi_enable_wakeup_device(acpi_state); + switch (acpi_state) { + case ACPI_STATE_S1: + barrier(); + status = acpi_enter_sleep_state(acpi_state); + break; + + case ACPI_STATE_S3: + do_suspend_lowlevel(); + break; + } + + /* If ACPI is not enabled by the BIOS, we need to enable it here. */ + if (set_sci_en_on_resume) + acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1); + else + acpi_enable(); + + /* Reprogram control registers and execute _BFS */ + acpi_leave_sleep_state_prep(acpi_state); + + /* ACPI 3.0 specs (P62) says that it's the responsibility + * of the OSPM to clear the status bit [ implying that the + * POWER_BUTTON event should not reach userspace ] + */ + if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) + acpi_clear_event(ACPI_EVENT_POWER_BUTTON); + + /* + * Disable and clear GPE status before interrupt is enabled. Some GPEs + * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. + * acpi_leave_sleep_state will reenable specific GPEs later + */ + acpi_hw_disable_all_gpes(); + + local_irq_restore(flags); + printk(KERN_DEBUG "Back to C!\n"); + + /* restore processor state */ + if (acpi_state == ACPI_STATE_S3) + acpi_restore_state_mem(); + + return ACPI_SUCCESS(status) ? 0 : -EFAULT; +} + +static int acpi_suspend_state_valid(suspend_state_t pm_state) +{ + u32 acpi_state; + + switch (pm_state) { + case PM_SUSPEND_ON: + case PM_SUSPEND_STANDBY: + case PM_SUSPEND_MEM: + acpi_state = acpi_suspend_states[pm_state]; + + return sleep_states[acpi_state]; + default: + return 0; + } +} + +static struct platform_suspend_ops acpi_suspend_ops = { + .valid = acpi_suspend_state_valid, + .begin = acpi_suspend_begin, + .prepare = acpi_pm_prepare, + .enter = acpi_suspend_enter, + .finish = acpi_pm_finish, + .end = acpi_pm_end, +}; + +/** + * acpi_suspend_begin_old - Set the target system sleep state to the + * state associated with given @pm_state, if supported, and + * execute the _PTS control method. This function is used if the + * pre-ACPI 2.0 suspend ordering has been requested. + */ +static int acpi_suspend_begin_old(suspend_state_t pm_state) +{ + int error = acpi_suspend_begin(pm_state); + + if (!error) + error = __acpi_pm_prepare(); + return error; +} + +/* + * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has + * been requested. + */ +static struct platform_suspend_ops acpi_suspend_ops_old = { + .valid = acpi_suspend_state_valid, + .begin = acpi_suspend_begin_old, + .prepare = acpi_pm_disable_gpes, + .enter = acpi_suspend_enter, + .finish = acpi_pm_finish, + .end = acpi_pm_end, + .recover = acpi_pm_finish, +}; + +static int __init init_old_suspend_ordering(const struct dmi_system_id *d) +{ + old_suspend_ordering = true; + return 0; +} + +static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d) +{ + set_sci_en_on_resume = true; + return 0; +} + +static struct dmi_system_id __initdata acpisleep_dmi_table[] = { + { + .callback = init_old_suspend_ordering, + .ident = "Abit KN9 (nForce4 variant)", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), + DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), + }, + }, + { + .callback = init_old_suspend_ordering, + .ident = "HP xw4600 Workstation", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), + }, + }, + { + .callback = init_set_sci_en_on_resume, + .ident = "Apple MacBook 1,1", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"), + }, + }, + { + .callback = init_set_sci_en_on_resume, + .ident = "Apple MacMini 1,1", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"), + }, + }, + {}, +}; +#endif /* CONFIG_SUSPEND */ + +#ifdef CONFIG_HIBERNATION +static unsigned long s4_hardware_signature; +static struct acpi_table_facs *facs; +static bool nosigcheck; + +void __init acpi_no_s4_hw_signature(void) +{ + nosigcheck = true; +} + +static int acpi_hibernation_begin(void) +{ + acpi_target_sleep_state = ACPI_STATE_S4; + acpi_sleep_tts_switch(acpi_target_sleep_state); + return 0; +} + +static int acpi_hibernation_enter(void) +{ + acpi_status status = AE_OK; + unsigned long flags = 0; + + ACPI_FLUSH_CPU_CACHE(); + + local_irq_save(flags); + acpi_enable_wakeup_device(ACPI_STATE_S4); + /* This shouldn't return. If it returns, we have a problem */ + status = acpi_enter_sleep_state(ACPI_STATE_S4); + /* Reprogram control registers and execute _BFS */ + acpi_leave_sleep_state_prep(ACPI_STATE_S4); + local_irq_restore(flags); + + return ACPI_SUCCESS(status) ? 0 : -EFAULT; +} + +static void acpi_hibernation_leave(void) +{ + /* + * If ACPI is not enabled by the BIOS and the boot kernel, we need to + * enable it here. + */ + acpi_enable(); + /* Reprogram control registers and execute _BFS */ + acpi_leave_sleep_state_prep(ACPI_STATE_S4); + /* Check the hardware signature */ + if (facs && s4_hardware_signature != facs->hardware_signature) { + printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " + "cannot resume!\n"); + panic("ACPI S4 hardware signature mismatch"); + } +} + +static void acpi_pm_enable_gpes(void) +{ + acpi_hw_enable_all_runtime_gpes(); +} + +static struct platform_hibernation_ops acpi_hibernation_ops = { + .begin = acpi_hibernation_begin, + .end = acpi_pm_end, + .pre_snapshot = acpi_pm_prepare, + .finish = acpi_pm_finish, + .prepare = acpi_pm_prepare, + .enter = acpi_hibernation_enter, + .leave = acpi_hibernation_leave, + .pre_restore = acpi_pm_disable_gpes, + .restore_cleanup = acpi_pm_enable_gpes, +}; + +/** + * acpi_hibernation_begin_old - Set the target system sleep state to + * ACPI_STATE_S4 and execute the _PTS control method. This + * function is used if the pre-ACPI 2.0 suspend ordering has been + * requested. + */ +static int acpi_hibernation_begin_old(void) +{ + int error; + /* + * The _TTS object should always be evaluated before the _PTS object. + * When the old_suspended_ordering is true, the _PTS object is + * evaluated in the acpi_sleep_prepare. + */ + acpi_sleep_tts_switch(ACPI_STATE_S4); + + error = acpi_sleep_prepare(ACPI_STATE_S4); + + if (!error) + acpi_target_sleep_state = ACPI_STATE_S4; + return error; +} + +/* + * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has + * been requested. + */ +static struct platform_hibernation_ops acpi_hibernation_ops_old = { + .begin = acpi_hibernation_begin_old, + .end = acpi_pm_end, + .pre_snapshot = acpi_pm_disable_gpes, + .finish = acpi_pm_finish, + .prepare = acpi_pm_disable_gpes, + .enter = acpi_hibernation_enter, + .leave = acpi_hibernation_leave, + .pre_restore = acpi_pm_disable_gpes, + .restore_cleanup = acpi_pm_enable_gpes, + .recover = acpi_pm_finish, +}; +#endif /* CONFIG_HIBERNATION */ + +int acpi_suspend(u32 acpi_state) +{ + suspend_state_t states[] = { + [1] = PM_SUSPEND_STANDBY, + [3] = PM_SUSPEND_MEM, + [5] = PM_SUSPEND_MAX + }; + + if (acpi_state < 6 && states[acpi_state]) + return pm_suspend(states[acpi_state]); + if (acpi_state == 4) + return hibernate(); + return -EINVAL; +} + +#ifdef CONFIG_PM_SLEEP +/** + * acpi_pm_device_sleep_state - return preferred power state of ACPI device + * in the system sleep state given by %acpi_target_sleep_state + * @dev: device to examine; its driver model wakeup flags control + * whether it should be able to wake up the system + * @d_min_p: used to store the upper limit of allowed states range + * Return value: preferred power state of the device on success, -ENODEV on + * failure (ie. if there's no 'struct acpi_device' for @dev) + * + * Find the lowest power (highest number) ACPI device power state that + * device @dev can be in while the system is in the sleep state represented + * by %acpi_target_sleep_state. If @wake is nonzero, the device should be + * able to wake up the system from this sleep state. If @d_min_p is set, + * the highest power (lowest number) device power state of @dev allowed + * in this system sleep state is stored at the location pointed to by it. + * + * The caller must ensure that @dev is valid before using this function. + * The caller is also responsible for figuring out if the device is + * supposed to be able to wake up the system and passing this information + * via @wake. + */ + +int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) +{ + acpi_handle handle = DEVICE_ACPI_HANDLE(dev); + struct acpi_device *adev; + char acpi_method[] = "_SxD"; + unsigned long long d_min, d_max; + + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { + printk(KERN_DEBUG "ACPI handle has no context!\n"); + return -ENODEV; + } + + acpi_method[2] = '0' + acpi_target_sleep_state; + /* + * If the sleep state is S0, we will return D3, but if the device has + * _S0W, we will use the value from _S0W + */ + d_min = ACPI_STATE_D0; + d_max = ACPI_STATE_D3; + + /* + * If present, _SxD methods return the minimum D-state (highest power + * state) we can use for the corresponding S-states. Otherwise, the + * minimum D-state is D0 (ACPI 3.x). + * + * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer + * provided -- that's our fault recovery, we ignore retval. + */ + if (acpi_target_sleep_state > ACPI_STATE_S0) + acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); + + /* + * If _PRW says we can wake up the system from the target sleep state, + * the D-state returned by _SxD is sufficient for that (we assume a + * wakeup-aware driver if wake is set). Still, if _SxW exists + * (ACPI 3.x), it should return the maximum (lowest power) D-state that + * can wake the system. _S0W may be valid, too. + */ + if (acpi_target_sleep_state == ACPI_STATE_S0 || + (device_may_wakeup(dev) && adev->wakeup.state.enabled && + adev->wakeup.sleep_state <= acpi_target_sleep_state)) { + acpi_status status; + + acpi_method[3] = 'W'; + status = acpi_evaluate_integer(handle, acpi_method, NULL, + &d_max); + if (ACPI_FAILURE(status)) { + d_max = d_min; + } else if (d_max < d_min) { + /* Warn the user of the broken DSDT */ + printk(KERN_WARNING "ACPI: Wrong value from %s\n", + acpi_method); + /* Sanitize it */ + d_min = d_max; + } + } + + if (d_min_p) + *d_min_p = d_min; + return d_max; +} + +/** + * acpi_pm_device_sleep_wake - enable or disable the system wake-up + * capability of given device + * @dev: device to handle + * @enable: 'true' - enable, 'false' - disable the wake-up capability + */ +int acpi_pm_device_sleep_wake(struct device *dev, bool enable) +{ + acpi_handle handle; + struct acpi_device *adev; + + if (!device_may_wakeup(dev)) + return -EINVAL; + + handle = DEVICE_ACPI_HANDLE(dev); + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { + printk(KERN_DEBUG "ACPI handle has no context!\n"); + return -ENODEV; + } + + return enable ? + acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : + acpi_disable_wakeup_device_power(adev); +} +#endif + +static void acpi_power_off_prepare(void) +{ + /* Prepare to power off the system */ + acpi_sleep_prepare(ACPI_STATE_S5); + acpi_hw_disable_all_gpes(); +} + +static void acpi_power_off(void) +{ + /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ + printk("%s called\n", __func__); + local_irq_disable(); + acpi_enable_wakeup_device(ACPI_STATE_S5); + acpi_enter_sleep_state(ACPI_STATE_S5); +} + +int __init acpi_sleep_init(void) +{ + acpi_status status; + u8 type_a, type_b; +#ifdef CONFIG_SUSPEND + int i = 0; + + dmi_check_system(acpisleep_dmi_table); +#endif + + if (acpi_disabled) + return 0; + + sleep_states[ACPI_STATE_S0] = 1; + printk(KERN_INFO PREFIX "(supports S0"); + +#ifdef CONFIG_SUSPEND + for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { + status = acpi_get_sleep_type_data(i, &type_a, &type_b); + if (ACPI_SUCCESS(status)) { + sleep_states[i] = 1; + printk(" S%d", i); + } + } + + suspend_set_ops(old_suspend_ordering ? + &acpi_suspend_ops_old : &acpi_suspend_ops); +#endif + +#ifdef CONFIG_HIBERNATION + status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); + if (ACPI_SUCCESS(status)) { + hibernation_set_ops(old_suspend_ordering ? + &acpi_hibernation_ops_old : &acpi_hibernation_ops); + sleep_states[ACPI_STATE_S4] = 1; + printk(" S4"); + if (!nosigcheck) { + acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, + (struct acpi_table_header **)&facs); + if (facs) + s4_hardware_signature = + facs->hardware_signature; + } + } +#endif + status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); + if (ACPI_SUCCESS(status)) { + sleep_states[ACPI_STATE_S5] = 1; + printk(" S5"); + pm_power_off_prepare = acpi_power_off_prepare; + pm_power_off = acpi_power_off; + } + printk(")\n"); + /* + * Register the tts_notifier to reboot notifier list so that the _TTS + * object can also be evaluated when the system enters S5. + */ + register_reboot_notifier(&tts_notifier); + return 0; +} diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c new file mode 100644 index 0000000..4dbc227 --- /dev/null +++ b/drivers/acpi/sleep/proc.c @@ -0,0 +1,526 @@ +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/suspend.h> +#include <linux/bcd.h> +#include <asm/uaccess.h> + +#include <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.h> + +#ifdef CONFIG_X86 +#include <linux/mc146818rtc.h> +#endif + +#include "sleep.h" + +#define _COMPONENT ACPI_SYSTEM_COMPONENT + +/* + * this file provides support for: + * /proc/acpi/sleep + * /proc/acpi/alarm + * /proc/acpi/wakeup + */ + +ACPI_MODULE_NAME("sleep") +#ifdef CONFIG_ACPI_PROCFS +static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset) +{ + int i; + + ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show"); + + for (i = 0; i <= ACPI_STATE_S5; i++) { + if (sleep_states[i]) { + seq_printf(seq, "S%d ", i); + } + } + + seq_puts(seq, "\n"); + + return 0; +} + +static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data); +} + +static ssize_t +acpi_system_write_sleep(struct file *file, + const char __user * buffer, size_t count, loff_t * ppos) +{ + char str[12]; + u32 state = 0; + int error = 0; + + if (count > sizeof(str) - 1) + goto Done; + memset(str, 0, sizeof(str)); + if (copy_from_user(str, buffer, count)) + return -EFAULT; + + /* Check for S4 bios request */ + if (!strcmp(str, "4b")) { + error = acpi_suspend(4); + goto Done; + } + state = simple_strtoul(str, NULL, 0); +#ifdef CONFIG_HIBERNATION + if (state == 4) { + error = hibernate(); + goto Done; + } +#endif + error = acpi_suspend(state); + Done: + return error ? error : count; +} +#endif /* CONFIG_ACPI_PROCFS */ + +#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) || !defined(CONFIG_X86) +/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */ +#else +#define HAVE_ACPI_LEGACY_ALARM +#endif + +#ifdef HAVE_ACPI_LEGACY_ALARM + +static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset) +{ + u32 sec, min, hr; + u32 day, mo, yr, cent = 0; + unsigned char rtc_control = 0; + unsigned long flags; + + ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show"); + + spin_lock_irqsave(&rtc_lock, flags); + + sec = CMOS_READ(RTC_SECONDS_ALARM); + min = CMOS_READ(RTC_MINUTES_ALARM); + hr = CMOS_READ(RTC_HOURS_ALARM); + rtc_control = CMOS_READ(RTC_CONTROL); + + /* If we ever get an FACP with proper values... */ + if (acpi_gbl_FADT.day_alarm) + /* ACPI spec: only low 6 its should be cared */ + day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F; + else + day = CMOS_READ(RTC_DAY_OF_MONTH); + if (acpi_gbl_FADT.month_alarm) + mo = CMOS_READ(acpi_gbl_FADT.month_alarm); + else + mo = CMOS_READ(RTC_MONTH); + if (acpi_gbl_FADT.century) + cent = CMOS_READ(acpi_gbl_FADT.century); + + yr = CMOS_READ(RTC_YEAR); + + spin_unlock_irqrestore(&rtc_lock, flags); + + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { + sec = bcd2bin(sec); + min = bcd2bin(min); + hr = bcd2bin(hr); + day = bcd2bin(day); + mo = bcd2bin(mo); + yr = bcd2bin(yr); + cent = bcd2bin(cent); + } + + /* we're trusting the FADT (see above) */ + if (!acpi_gbl_FADT.century) + /* If we're not trusting the FADT, we should at least make it + * right for _this_ century... ehm, what is _this_ century? + * + * TBD: + * ASAP: find piece of code in the kernel, e.g. star tracker driver, + * which we can trust to determine the century correctly. Atom + * watch driver would be nice, too... + * + * if that has not happened, change for first release in 2050: + * if (yr<50) + * yr += 2100; + * else + * yr += 2000; // current line of code + * + * if that has not happened either, please do on 2099/12/31:23:59:59 + * s/2000/2100 + * + */ + yr += 2000; + else + yr += cent * 100; + + seq_printf(seq, "%4.4u-", yr); + (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo); + (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day); + (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr); + (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min); + (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec); + + return 0; +} + +static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data); +} + +static int get_date_field(char **p, u32 * value) +{ + char *next = NULL; + char *string_end = NULL; + int result = -EINVAL; + + /* + * Try to find delimeter, only to insert null. The end of the + * string won't have one, but is still valid. + */ + if (*p == NULL) + return result; + + next = strpbrk(*p, "- :"); + if (next) + *next++ = '\0'; + + *value = simple_strtoul(*p, &string_end, 10); + + /* Signal success if we got a good digit */ + if (string_end != *p) + result = 0; + + if (next) + *p = next; + else + *p = NULL; + + return result; +} + +/* Read a possibly BCD register, always return binary */ +static u32 cmos_bcd_read(int offset, int rtc_control) +{ + u32 val = CMOS_READ(offset); + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) + val = bcd2bin(val); + return val; +} + +/* Write binary value into possibly BCD register */ +static void cmos_bcd_write(u32 val, int offset, int rtc_control) +{ + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) + val = bin2bcd(val); + CMOS_WRITE(val, offset); +} + +static ssize_t +acpi_system_write_alarm(struct file *file, + const char __user * buffer, size_t count, loff_t * ppos) +{ + int result = 0; + char alarm_string[30] = { '\0' }; + char *p = alarm_string; + u32 sec, min, hr, day, mo, yr; + int adjust = 0; + unsigned char rtc_control = 0; + + ACPI_FUNCTION_TRACE("acpi_system_write_alarm"); + + if (count > sizeof(alarm_string) - 1) + return_VALUE(-EINVAL); + + if (copy_from_user(alarm_string, buffer, count)) + return_VALUE(-EFAULT); + + alarm_string[count] = '\0'; + + /* check for time adjustment */ + if (alarm_string[0] == '+') { + p++; + adjust = 1; + } + + if ((result = get_date_field(&p, &yr))) + goto end; + if ((result = get_date_field(&p, &mo))) + goto end; + if ((result = get_date_field(&p, &day))) + goto end; + if ((result = get_date_field(&p, &hr))) + goto end; + if ((result = get_date_field(&p, &min))) + goto end; + if ((result = get_date_field(&p, &sec))) + goto end; + + spin_lock_irq(&rtc_lock); + + rtc_control = CMOS_READ(RTC_CONTROL); + + if (adjust) { + yr += cmos_bcd_read(RTC_YEAR, rtc_control); + mo += cmos_bcd_read(RTC_MONTH, rtc_control); + day += cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control); + hr += cmos_bcd_read(RTC_HOURS, rtc_control); + min += cmos_bcd_read(RTC_MINUTES, rtc_control); + sec += cmos_bcd_read(RTC_SECONDS, rtc_control); + } + + spin_unlock_irq(&rtc_lock); + + if (sec > 59) { + min += sec/60; + sec = sec%60; + } + if (min > 59) { + hr += min/60; + min = min%60; + } + if (hr > 23) { + day += hr/24; + hr = hr%24; + } + if (day > 31) { + mo += day/32; + day = day%32; + } + if (mo > 12) { + yr += mo/13; + mo = mo%13; + } + + spin_lock_irq(&rtc_lock); + /* + * Disable alarm interrupt before setting alarm timer or else + * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs + */ + rtc_control &= ~RTC_AIE; + CMOS_WRITE(rtc_control, RTC_CONTROL); + CMOS_READ(RTC_INTR_FLAGS); + + /* write the fields the rtc knows about */ + cmos_bcd_write(hr, RTC_HOURS_ALARM, rtc_control); + cmos_bcd_write(min, RTC_MINUTES_ALARM, rtc_control); + cmos_bcd_write(sec, RTC_SECONDS_ALARM, rtc_control); + + /* + * If the system supports an enhanced alarm it will have non-zero + * offsets into the CMOS RAM here -- which for some reason are pointing + * to the RTC area of memory. + */ + if (acpi_gbl_FADT.day_alarm) + cmos_bcd_write(day, acpi_gbl_FADT.day_alarm, rtc_control); + if (acpi_gbl_FADT.month_alarm) + cmos_bcd_write(mo, acpi_gbl_FADT.month_alarm, rtc_control); + if (acpi_gbl_FADT.century) { + if (adjust) + yr += cmos_bcd_read(acpi_gbl_FADT.century, rtc_control) * 100; + cmos_bcd_write(yr / 100, acpi_gbl_FADT.century, rtc_control); + } + /* enable the rtc alarm interrupt */ + rtc_control |= RTC_AIE; + CMOS_WRITE(rtc_control, RTC_CONTROL); + CMOS_READ(RTC_INTR_FLAGS); + + spin_unlock_irq(&rtc_lock); + + acpi_clear_event(ACPI_EVENT_RTC); + acpi_enable_event(ACPI_EVENT_RTC, 0); + + *ppos += count; + + result = 0; + end: + return_VALUE(result ? result : count); +} +#endif /* HAVE_ACPI_LEGACY_ALARM */ + +extern struct list_head acpi_wakeup_device_list; +extern spinlock_t acpi_device_lock; + +static int +acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) +{ + struct list_head *node, *next; + + seq_printf(seq, "Device\tS-state\t Status Sysfs node\n"); + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = + container_of(node, struct acpi_device, wakeup_list); + struct device *ldev; + + if (!dev->wakeup.flags.valid) + continue; + spin_unlock(&acpi_device_lock); + + ldev = acpi_get_physical_device(dev->handle); + seq_printf(seq, "%s\t S%d\t%c%-8s ", + dev->pnp.bus_id, + (u32) dev->wakeup.sleep_state, + dev->wakeup.flags.run_wake ? '*' : ' ', + dev->wakeup.state.enabled ? "enabled" : "disabled"); + if (ldev) + seq_printf(seq, "%s:%s", + ldev->bus ? ldev->bus->name : "no-bus", + dev_name(ldev)); + seq_printf(seq, "\n"); + put_device(ldev); + + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); + return 0; +} + +static void physical_device_enable_wakeup(struct acpi_device *adev) +{ + struct device *dev = acpi_get_physical_device(adev->handle); + + if (dev && device_can_wakeup(dev)) + device_set_wakeup_enable(dev, adev->wakeup.state.enabled); +} + +static ssize_t +acpi_system_write_wakeup_device(struct file *file, + const char __user * buffer, + size_t count, loff_t * ppos) +{ + struct list_head *node, *next; + char strbuf[5]; + char str[5] = ""; + int len = count; + struct acpi_device *found_dev = NULL; + + if (len > 4) + len = 4; + + if (copy_from_user(strbuf, buffer, len)) + return -EFAULT; + strbuf[len] = '\0'; + sscanf(strbuf, "%s", str); + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = + container_of(node, struct acpi_device, wakeup_list); + if (!dev->wakeup.flags.valid) + continue; + + if (!strncmp(dev->pnp.bus_id, str, 4)) { + dev->wakeup.state.enabled = + dev->wakeup.state.enabled ? 0 : 1; + found_dev = dev; + break; + } + } + if (found_dev) { + physical_device_enable_wakeup(found_dev); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = container_of(node, + struct + acpi_device, + wakeup_list); + + if ((dev != found_dev) && + (dev->wakeup.gpe_number == + found_dev->wakeup.gpe_number) + && (dev->wakeup.gpe_device == + found_dev->wakeup.gpe_device)) { + printk(KERN_WARNING + "ACPI: '%s' and '%s' have the same GPE, " + "can't disable/enable one seperately\n", + dev->pnp.bus_id, found_dev->pnp.bus_id); + dev->wakeup.state.enabled = + found_dev->wakeup.state.enabled; + physical_device_enable_wakeup(dev); + } + } + } + spin_unlock(&acpi_device_lock); + return count; +} + +static int +acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_system_wakeup_device_seq_show, + PDE(inode)->data); +} + +static const struct file_operations acpi_system_wakeup_device_fops = { + .owner = THIS_MODULE, + .open = acpi_system_wakeup_device_open_fs, + .read = seq_read, + .write = acpi_system_write_wakeup_device, + .llseek = seq_lseek, + .release = single_release, +}; + +#ifdef CONFIG_ACPI_PROCFS +static const struct file_operations acpi_system_sleep_fops = { + .owner = THIS_MODULE, + .open = acpi_system_sleep_open_fs, + .read = seq_read, + .write = acpi_system_write_sleep, + .llseek = seq_lseek, + .release = single_release, +}; +#endif /* CONFIG_ACPI_PROCFS */ + +#ifdef HAVE_ACPI_LEGACY_ALARM +static const struct file_operations acpi_system_alarm_fops = { + .owner = THIS_MODULE, + .open = acpi_system_alarm_open_fs, + .read = seq_read, + .write = acpi_system_write_alarm, + .llseek = seq_lseek, + .release = single_release, +}; + +static u32 rtc_handler(void *context) +{ + acpi_clear_event(ACPI_EVENT_RTC); + acpi_disable_event(ACPI_EVENT_RTC, 0); + + return ACPI_INTERRUPT_HANDLED; +} +#endif /* HAVE_ACPI_LEGACY_ALARM */ + +static int __init acpi_sleep_proc_init(void) +{ + if (acpi_disabled) + return 0; + +#ifdef CONFIG_ACPI_PROCFS + /* 'sleep' [R/W] */ + proc_create("sleep", S_IFREG | S_IRUGO | S_IWUSR, + acpi_root_dir, &acpi_system_sleep_fops); +#endif /* CONFIG_ACPI_PROCFS */ + +#ifdef HAVE_ACPI_LEGACY_ALARM + /* 'alarm' [R/W] */ + proc_create("alarm", S_IFREG | S_IRUGO | S_IWUSR, + acpi_root_dir, &acpi_system_alarm_fops); + + acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); + /* + * Disable the RTC event after installing RTC handler. + * Only when RTC alarm is set will it be enabled. + */ + acpi_clear_event(ACPI_EVENT_RTC); + acpi_disable_event(ACPI_EVENT_RTC, 0); +#endif /* HAVE_ACPI_LEGACY_ALARM */ + + /* 'wakeup device' [R/W] */ + proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR, + acpi_root_dir, &acpi_system_wakeup_device_fops); + + return 0; +} + +late_initcall(acpi_sleep_proc_init); diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h new file mode 100644 index 0000000..cfaf8f5 --- /dev/null +++ b/drivers/acpi/sleep/sleep.h @@ -0,0 +1,7 @@ + +extern u8 sleep_states[]; +extern int acpi_suspend (u32 state); + +extern void acpi_enable_wakeup_device_prep(u8 sleep_state); +extern void acpi_enable_wakeup_device(u8 sleep_state); +extern void acpi_disable_wakeup_device(u8 sleep_state); diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c new file mode 100644 index 0000000..dea4c23 --- /dev/null +++ b/drivers/acpi/sleep/wakeup.c @@ -0,0 +1,173 @@ +/* + * wakeup.c - support wakeup devices + * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com> + */ + +#include <linux/init.h> +#include <linux/acpi.h> +#include <acpi/acpi_drivers.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <acpi/acevents.h> +#include "sleep.h" + +#define _COMPONENT ACPI_SYSTEM_COMPONENT +ACPI_MODULE_NAME("wakeup_devices") + +extern struct list_head acpi_wakeup_device_list; +extern spinlock_t acpi_device_lock; + +/** + * acpi_enable_wakeup_device_prep - prepare wakeup devices + * @sleep_state: ACPI state + * Enable all wakup devices power if the devices' wakeup level + * is higher than requested sleep level + */ + +void acpi_enable_wakeup_device_prep(u8 sleep_state) +{ + struct list_head *node, *next; + + ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device_prep"); + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = container_of(node, + struct acpi_device, + wakeup_list); + + if (!dev->wakeup.flags.valid || + !dev->wakeup.state.enabled || + (sleep_state > (u32) dev->wakeup.sleep_state)) + continue; + + spin_unlock(&acpi_device_lock); + acpi_enable_wakeup_device_power(dev, sleep_state); + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); +} + +/** + * acpi_enable_wakeup_device - enable wakeup devices + * @sleep_state: ACPI state + * Enable all wakup devices's GPE + */ +void acpi_enable_wakeup_device(u8 sleep_state) +{ + struct list_head *node, *next; + + /* + * Caution: this routine must be invoked when interrupt is disabled + * Refer ACPI2.0: P212 + */ + ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device"); + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = + container_of(node, struct acpi_device, wakeup_list); + + if (!dev->wakeup.flags.valid) + continue; + + /* If users want to disable run-wake GPE, + * we only disable it for wake and leave it for runtime + */ + if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) + || sleep_state > (u32) dev->wakeup.sleep_state) { + if (dev->wakeup.flags.run_wake) { + spin_unlock(&acpi_device_lock); + /* set_gpe_type will disable GPE, leave it like that */ + acpi_set_gpe_type(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, + ACPI_GPE_TYPE_RUNTIME); + spin_lock(&acpi_device_lock); + } + continue; + } + spin_unlock(&acpi_device_lock); + if (!dev->wakeup.flags.run_wake) + acpi_enable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number); + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); +} + +/** + * acpi_disable_wakeup_device - disable devices' wakeup capability + * @sleep_state: ACPI state + * Disable all wakup devices's GPE and wakeup capability + */ +void acpi_disable_wakeup_device(u8 sleep_state) +{ + struct list_head *node, *next; + + ACPI_FUNCTION_TRACE("acpi_disable_wakeup_device"); + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = + container_of(node, struct acpi_device, wakeup_list); + + if (!dev->wakeup.flags.valid) + continue; + + if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) + || sleep_state > (u32) dev->wakeup.sleep_state) { + if (dev->wakeup.flags.run_wake) { + spin_unlock(&acpi_device_lock); + acpi_set_gpe_type(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, + ACPI_GPE_TYPE_WAKE_RUN); + /* Re-enable it, since set_gpe_type will disable it */ + acpi_enable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number); + spin_lock(&acpi_device_lock); + } + continue; + } + + spin_unlock(&acpi_device_lock); + acpi_disable_wakeup_device_power(dev); + /* Never disable run-wake GPE */ + if (!dev->wakeup.flags.run_wake) { + acpi_disable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number); + acpi_clear_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_NOT_ISR); + } + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); +} + +static int __init acpi_wakeup_device_init(void) +{ + struct list_head *node, *next; + + if (acpi_disabled) + return 0; + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device *dev = container_of(node, + struct acpi_device, + wakeup_list); + /* In case user doesn't load button driver */ + if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled) + continue; + spin_unlock(&acpi_device_lock); + acpi_set_gpe_type(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, + ACPI_GPE_TYPE_WAKE_RUN); + acpi_enable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number); + dev->wakeup.state.enabled = 1; + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); + return 0; +} + +late_initcall(acpi_wakeup_device_init); |