From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: 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! --- drivers/acpi/sleep/Makefile | 5 + drivers/acpi/sleep/main.c | 234 +++++++++++++++++++ drivers/acpi/sleep/poweroff.c | 39 ++++ drivers/acpi/sleep/proc.c | 509 ++++++++++++++++++++++++++++++++++++++++++ drivers/acpi/sleep/sleep.h | 8 + drivers/acpi/sleep/wakeup.c | 209 +++++++++++++++++ 6 files changed, 1004 insertions(+) create mode 100644 drivers/acpi/sleep/Makefile create mode 100644 drivers/acpi/sleep/main.c create mode 100644 drivers/acpi/sleep/poweroff.c create mode 100644 drivers/acpi/sleep/proc.c create mode 100644 drivers/acpi/sleep/sleep.h create mode 100644 drivers/acpi/sleep/wakeup.c (limited to 'drivers/acpi/sleep') diff --git a/drivers/acpi/sleep/Makefile b/drivers/acpi/sleep/Makefile new file mode 100644 index 000000000000..d6c017709c85 --- /dev/null +++ b/drivers/acpi/sleep/Makefile @@ -0,0 +1,5 @@ +obj-y := poweroff.o wakeup.o +obj-$(CONFIG_ACPI_SLEEP) += main.o +obj-$(CONFIG_ACPI_SLEEP_PROC_FS) += 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 000000000000..0a5d2a94131e --- /dev/null +++ b/drivers/acpi/sleep/main.c @@ -0,0 +1,234 @@ +/* + * sleep.c - ACPI sleep support. + * + * Copyright (c) 2004 David Shaohua Li + * Copyright (c) 2000-2003 Patrick Mochel + * Copyright (c) 2003 Open Source Development Lab + * + * This file is released under the GPLv2. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "sleep.h" + +u8 sleep_states[ACPI_S_STATE_COUNT]; + +static struct pm_ops acpi_pm_ops; + +extern void do_suspend_lowlevel_s4bios(void); +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_DISK] = ACPI_STATE_S4, +}; + +static int init_8259A_after_S1; + +/** + * acpi_pm_prepare - Do preliminary suspend work. + * @pm_state: suspend state we're entering. + * + * Make sure we support the state. If we do, and we need it, set the + * firmware waking vector and do arch-specific nastiness to get the + * wakeup code to the waking vector. + */ + +static int acpi_pm_prepare(suspend_state_t pm_state) +{ + u32 acpi_state = acpi_suspend_states[pm_state]; + + if (!sleep_states[acpi_state]) + return -EPERM; + + /* do we have a wakeup address for S2 and S3? */ + /* Here, we support only S4BIOS, those we set the wakeup address */ + /* S4OS is only supported for now via swsusp.. */ + if (pm_state == PM_SUSPEND_MEM || pm_state == PM_SUSPEND_DISK) { + if (!acpi_wakeup_address) + return -EFAULT; + acpi_set_firmware_waking_vector( + (acpi_physical_address) virt_to_phys( + (void *)acpi_wakeup_address)); + } + ACPI_FLUSH_CPU_CACHE(); + acpi_enable_wakeup_device_prep(acpi_state); + acpi_enter_sleep_state_prep(acpi_state); + return 0; +} + + +/** + * acpi_pm_enter - Actually enter a sleep state. + * @pm_state: State we're entering. + * + * Flush caches and go to sleep. For STR or STD, 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_pm_enter(suspend_state_t pm_state) +{ + acpi_status status = AE_OK; + unsigned long flags = 0; + u32 acpi_state = acpi_suspend_states[pm_state]; + + ACPI_FLUSH_CPU_CACHE(); + + /* Do arch specific saving of state. */ + if (pm_state > PM_SUSPEND_STANDBY) { + int error = acpi_save_state_mem(); + if (error) + return error; + } + + + local_irq_save(flags); + acpi_enable_wakeup_device(acpi_state); + switch (pm_state) + { + case PM_SUSPEND_STANDBY: + barrier(); + status = acpi_enter_sleep_state(acpi_state); + break; + + case PM_SUSPEND_MEM: + do_suspend_lowlevel(); + break; + + case PM_SUSPEND_DISK: + if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM) + status = acpi_enter_sleep_state(acpi_state); + else + do_suspend_lowlevel_s4bios(); + break; + default: + return -EINVAL; + } + local_irq_restore(flags); + printk(KERN_DEBUG "Back to C!\n"); + + /* restore processor state + * We should only be here if we're coming back from STR or STD. + * And, in the case of the latter, the memory image should have already + * been loaded from disk. + */ + if (pm_state > PM_SUSPEND_STANDBY) + acpi_restore_state_mem(); + + + return ACPI_SUCCESS(status) ? 0 : -EFAULT; +} + + +/** + * acpi_pm_finish - Finish up suspend sequence. + * @pm_state: State we're coming out of. + * + * This is called after we wake back up (or if entering the sleep state + * failed). + */ + +static int acpi_pm_finish(suspend_state_t pm_state) +{ + u32 acpi_state = acpi_suspend_states[pm_state]; + + acpi_leave_sleep_state(acpi_state); + acpi_disable_wakeup_device(acpi_state); + + /* reset firmware waking vector */ + acpi_set_firmware_waking_vector((acpi_physical_address) 0); + + if (init_8259A_after_S1) { + printk("Broken toshiba laptop -> kicking interrupts\n"); + init_8259A(0); + } + return 0; +} + + +int acpi_suspend(u32 acpi_state) +{ + suspend_state_t states[] = { + [1] = PM_SUSPEND_STANDBY, + [3] = PM_SUSPEND_MEM, + [4] = PM_SUSPEND_DISK, + }; + + if (acpi_state <= 4 && states[acpi_state]) + return pm_suspend(states[acpi_state]); + return -EINVAL; +} + +static struct pm_ops acpi_pm_ops = { + .prepare = acpi_pm_prepare, + .enter = acpi_pm_enter, + .finish = acpi_pm_finish, +}; + + +/* + * Toshiba fails to preserve interrupts over S1, reinitialization + * of 8259 is needed after S1 resume. + */ +static int __init init_ints_after_s1(struct dmi_system_id *d) +{ + printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident); + init_8259A_after_S1 = 1; + return 0; +} + +static struct dmi_system_id __initdata acpisleep_dmi_table[] = { + { + .callback = init_ints_after_s1, + .ident = "Toshiba Satellite 4030cdt", + .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"), }, + }, + { }, +}; + +static int __init acpi_sleep_init(void) +{ + int i = 0; + + dmi_check_system(acpisleep_dmi_table); + + if (acpi_disabled) + return 0; + + printk(KERN_INFO PREFIX "(supports"); + for (i=0; i < ACPI_S_STATE_COUNT; i++) { + acpi_status status; + u8 type_a, type_b; + status = acpi_get_sleep_type_data(i, &type_a, &type_b); + if (ACPI_SUCCESS(status)) { + sleep_states[i] = 1; + printk(" S%d", i); + } + if (i == ACPI_STATE_S4) { + if (acpi_gbl_FACS->S4bios_f) { + sleep_states[i] = 1; + printk(" S4bios"); + acpi_pm_ops.pm_disk_mode = PM_DISK_FIRMWARE; + } + if (sleep_states[i]) + acpi_pm_ops.pm_disk_mode = PM_DISK_PLATFORM; + } + } + printk(")\n"); + + pm_set_ops(&acpi_pm_ops); + return 0; +} + +late_initcall(acpi_sleep_init); diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c new file mode 100644 index 000000000000..da237754ded9 --- /dev/null +++ b/drivers/acpi/sleep/poweroff.c @@ -0,0 +1,39 @@ +/* + * poweroff.c - ACPI handler for powering off the system. + * + * AKA S5, but it is independent of whether or not the kernel supports + * any other sleep support in the system. + */ + +#include +#include +#include +#include +#include "sleep.h" + +static void +acpi_power_off (void) +{ + printk("%s called\n",__FUNCTION__); + /* Some SMP machines only can poweroff in boot CPU */ + set_cpus_allowed(current, cpumask_of_cpu(0)); + acpi_wakeup_gpe_poweroff_prepare(); + acpi_enter_sleep_state_prep(ACPI_STATE_S5); + ACPI_DISABLE_IRQS(); + acpi_enter_sleep_state(ACPI_STATE_S5); +} + +static int acpi_poweroff_init(void) +{ + if (!acpi_disabled) { + u8 type_a, type_b; + acpi_status status; + + status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); + if (ACPI_SUCCESS(status)) + pm_power_off = acpi_power_off; + } + return 0; +} + +late_initcall(acpi_poweroff_init); diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c new file mode 100644 index 000000000000..fd7c5a0649af --- /dev/null +++ b/drivers/acpi/sleep/proc.c @@ -0,0 +1,509 @@ +#include +#include +#include +#include +#include + +#include +#include + +#ifdef CONFIG_X86 +#include +#endif + +#include "sleep.h" + +#define ACPI_SYSTEM_FILE_SLEEP "sleep" +#define ACPI_SYSTEM_FILE_ALARM "alarm" +#define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup" + +#define _COMPONENT ACPI_SYSTEM_COMPONENT +ACPI_MODULE_NAME ("sleep") + + +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); + if (i == ACPI_STATE_S4 && acpi_gbl_FACS->S4bios_f) + seq_printf(seq, "S4bios "); + } + } + + 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_SOFTWARE_SUSPEND + if (state == 4) { + error = software_suspend(); + goto Done; + } +#endif + error = acpi_suspend(state); + Done: + return error ? error : count; +} + +static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset) +{ + u32 sec, min, hr; + u32 day, mo, yr; + 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_alrm) + /* ACPI spec: only low 6 its should be cared */ + day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F; + else + day = CMOS_READ(RTC_DAY_OF_MONTH); + if (acpi_gbl_FADT->mon_alrm) + mo = CMOS_READ(acpi_gbl_FADT->mon_alrm); + else + mo = CMOS_READ(RTC_MONTH); + if (acpi_gbl_FADT->century) + yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR); + else + yr = CMOS_READ(RTC_YEAR); + + spin_unlock_irqrestore(&rtc_lock, flags); + + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { + BCD_TO_BIN(sec); + BCD_TO_BIN(min); + BCD_TO_BIN(hr); + BCD_TO_BIN(day); + BCD_TO_BIN(mo); + BCD_TO_BIN(yr); + } + + /* 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; + + 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. + */ + 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; + + return result; +} + + +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; + + if (sec > 59) { + min += 1; + sec -= 60; + } + if (min > 59) { + hr += 1; + min -= 60; + } + if (hr > 23) { + day += 1; + hr -= 24; + } + if (day > 31) { + mo += 1; + day -= 31; + } + if (mo > 12) { + yr += 1; + mo -= 12; + } + + spin_lock_irq(&rtc_lock); + + rtc_control = CMOS_READ(RTC_CONTROL); + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { + BIN_TO_BCD(yr); + BIN_TO_BCD(mo); + BIN_TO_BCD(day); + BIN_TO_BCD(hr); + BIN_TO_BCD(min); + BIN_TO_BCD(sec); + } + + if (adjust) { + yr += CMOS_READ(RTC_YEAR); + mo += CMOS_READ(RTC_MONTH); + day += CMOS_READ(RTC_DAY_OF_MONTH); + hr += CMOS_READ(RTC_HOURS); + min += CMOS_READ(RTC_MINUTES); + sec += CMOS_READ(RTC_SECONDS); + } + + spin_unlock_irq(&rtc_lock); + + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { + BCD_TO_BIN(yr); + BCD_TO_BIN(mo); + BCD_TO_BIN(day); + BCD_TO_BIN(hr); + BCD_TO_BIN(min); + BCD_TO_BIN(sec); + } + + if (sec > 59) { + min++; + sec -= 60; + } + if (min > 59) { + hr++; + min -= 60; + } + if (hr > 23) { + day++; + hr -= 24; + } + if (day > 31) { + mo++; + day -= 31; + } + if (mo > 12) { + yr++; + mo -= 12; + } + if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { + BIN_TO_BCD(yr); + BIN_TO_BCD(mo); + BIN_TO_BCD(day); + BIN_TO_BCD(hr); + BIN_TO_BCD(min); + BIN_TO_BCD(sec); + } + + 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_WRITE(hr, RTC_HOURS_ALARM); + CMOS_WRITE(min, RTC_MINUTES_ALARM); + CMOS_WRITE(sec, RTC_SECONDS_ALARM); + + /* + * 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_alrm) + CMOS_WRITE(day, acpi_gbl_FADT->day_alrm); + if (acpi_gbl_FADT->mon_alrm) + CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm); + if (acpi_gbl_FADT->century) + CMOS_WRITE(yr/100, acpi_gbl_FADT->century); + /* 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); +} + +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 Sleep state Status\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); + + if (!dev->wakeup.flags.valid) + continue; + spin_unlock(&acpi_device_lock); + if (dev->wakeup.flags.run_wake) + seq_printf(seq, "%4s %4d %8s\n", + dev->pnp.bus_id, (u32) dev->wakeup.sleep_state, + dev->wakeup.state.enabled ? "*enabled" : "*disabled"); + else + seq_printf(seq, "%4s %4d %8s\n", + dev->pnp.bus_id, (u32) dev->wakeup.sleep_state, + dev->wakeup.state.enabled ? "enabled" : "disabled"); + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); + return 0; +} + +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) { + 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; + } + } + } + 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 struct file_operations acpi_system_wakeup_device_fops = { + .open = acpi_system_wakeup_device_open_fs, + .read = seq_read, + .write = acpi_system_write_wakeup_device, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_system_sleep_fops = { + .open = acpi_system_sleep_open_fs, + .read = seq_read, + .write = acpi_system_write_sleep, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct file_operations acpi_system_alarm_fops = { + .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; +} + +static int acpi_sleep_proc_init(void) +{ + struct proc_dir_entry *entry = NULL; + + if (acpi_disabled) + return 0; + + /* 'sleep' [R/W]*/ + entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP, + S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); + if (entry) + entry->proc_fops = &acpi_system_sleep_fops; + + /* 'alarm' [R/W] */ + entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM, + S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); + if (entry) + entry->proc_fops = &acpi_system_alarm_fops; + + /* 'wakeup device' [R/W]*/ + entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE, + S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); + if (entry) + entry->proc_fops = &acpi_system_wakeup_device_fops; + + acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); + 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 000000000000..efd0001c6f05 --- /dev/null +++ b/drivers/acpi/sleep/sleep.h @@ -0,0 +1,8 @@ + +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); +extern void acpi_wakeup_gpe_poweroff_prepare(void); diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c new file mode 100644 index 000000000000..d9b199969d5d --- /dev/null +++ b/drivers/acpi/sleep/wakeup.c @@ -0,0 +1,209 @@ +/* + * wakeup.c - support wakeup devices + * Copyright (C) 2004 Li Shaohua + */ + +#include +#include +#include +#include +#include +#include +#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; + +#ifdef CONFIG_ACPI_SLEEP +/** + * 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); + 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 users want to disable run-wake GPE, + * we only disable it for wake and leave it for runtime + */ + if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) { + spin_unlock(&acpi_device_lock); + acpi_set_gpe_type(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_GPE_TYPE_RUNTIME); + /* Re-enable it, since set_gpe_type will disable it */ + acpi_enable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_ISR); + spin_lock(&acpi_device_lock); + continue; + } + + if (!dev->wakeup.flags.valid || + !dev->wakeup.state.enabled || + (sleep_state > (u32) dev->wakeup.sleep_state)) + continue; + + spin_unlock(&acpi_device_lock); + /* run-wake GPE has been enabled */ + if (!dev->wakeup.flags.run_wake) + acpi_enable_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_ISR); + dev->wakeup.state.active = 1; + 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.run_wake && !dev->wakeup.state.enabled) { + 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, ACPI_NOT_ISR); + spin_lock(&acpi_device_lock); + continue; + } + + if (!dev->wakeup.flags.valid || + !dev->wakeup.state.active || + (sleep_state > (u32) dev->wakeup.sleep_state)) + 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_NOT_ISR); + acpi_clear_gpe(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_NOT_ISR); + } + dev->wakeup.state.active = 0; + 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; + printk("ACPI wakeup devices: \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); + + /* In case user doesn't load button driver */ + if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) { + 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, ACPI_NOT_ISR); + dev->wakeup.state.enabled = 1; + spin_lock(&acpi_device_lock); + } + printk("%4s ", dev->pnp.bus_id); + } + spin_unlock(&acpi_device_lock); + printk("\n"); + + return 0; +} + +late_initcall(acpi_wakeup_device_init); +#endif + +/* + * Disable all wakeup GPEs before power off. + * + * Since acpi_enter_sleep_state() will disable all + * RUNTIME GPEs, we simply mark all GPES that + * are not enabled for wakeup from S5 as RUNTIME. + */ +void acpi_wakeup_gpe_poweroff_prepare(void) +{ + struct list_head * node, * next; + + list_for_each_safe(node, next, &acpi_wakeup_device_list) { + struct acpi_device * dev = container_of(node, + struct acpi_device, wakeup_list); + + /* The GPE can wakeup system from S5, don't touch it */ + if ((u32)dev->wakeup.sleep_state == ACPI_STATE_S5) + continue; + /* acpi_set_gpe_type will automatically disable GPE */ + acpi_set_gpe_type(dev->wakeup.gpe_device, + dev->wakeup.gpe_number, ACPI_GPE_TYPE_RUNTIME); + } +} -- cgit v1.2.1