forked from Minki/linux
024aa8732a
Note that the EC GPE processing need not be synchronized in acpi_s2idle_wake() after invoking acpi_ec_dispatch_gpe(), because that function checks the GPE status and dispatches its handler if need be and the SCI action handler is not going to run anyway at that point. Moreover, it is better to drain all of the pending ACPI events before restoring the working-state configuration of GPEs in acpi_s2idle_restore(), because those events are likely to be related to system wakeup, in which case they will not be relevant going forward. Rework the code to take these observations into account. Tested-by: Kenneth R. Crudup <kenny@panix.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1323 lines
32 KiB
C
1323 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sleep.c - ACPI sleep support.
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*
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* Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
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* Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
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* Copyright (c) 2000-2003 Patrick Mochel
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* Copyright (c) 2003 Open Source Development Lab
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*/
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/dmi.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/suspend.h>
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#include <linux/reboot.h>
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include <linux/syscore_ops.h>
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#include <asm/io.h>
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#include <trace/events/power.h>
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#include "internal.h"
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#include "sleep.h"
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/*
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* Some HW-full platforms do not have _S5, so they may need
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* to leverage efi power off for a shutdown.
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*/
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bool acpi_no_s5;
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static u8 sleep_states[ACPI_S_STATE_COUNT];
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static void acpi_sleep_tts_switch(u32 acpi_state)
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{
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acpi_status status;
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status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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/*
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* OS can't evaluate the _TTS object correctly. Some warning
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* message will be printed. But it won't break anything.
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*/
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printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
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}
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}
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static int tts_notify_reboot(struct notifier_block *this,
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unsigned long code, void *x)
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{
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acpi_sleep_tts_switch(ACPI_STATE_S5);
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return NOTIFY_DONE;
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}
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static struct notifier_block tts_notifier = {
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.notifier_call = tts_notify_reboot,
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.next = NULL,
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.priority = 0,
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};
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static int acpi_sleep_prepare(u32 acpi_state)
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{
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#ifdef CONFIG_ACPI_SLEEP
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/* do we have a wakeup address for S2 and S3? */
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if (acpi_state == ACPI_STATE_S3) {
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if (!acpi_wakeup_address)
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return -EFAULT;
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acpi_set_waking_vector(acpi_wakeup_address);
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}
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ACPI_FLUSH_CPU_CACHE();
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#endif
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printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
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acpi_state);
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acpi_enable_wakeup_devices(acpi_state);
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acpi_enter_sleep_state_prep(acpi_state);
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return 0;
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}
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bool acpi_sleep_state_supported(u8 sleep_state)
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{
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acpi_status status;
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u8 type_a, type_b;
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status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b);
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return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware
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|| (acpi_gbl_FADT.sleep_control.address
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&& acpi_gbl_FADT.sleep_status.address));
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}
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#ifdef CONFIG_ACPI_SLEEP
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static bool sleep_no_lps0 __read_mostly;
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module_param(sleep_no_lps0, bool, 0644);
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MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface");
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static u32 acpi_target_sleep_state = ACPI_STATE_S0;
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u32 acpi_target_system_state(void)
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{
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return acpi_target_sleep_state;
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}
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EXPORT_SYMBOL_GPL(acpi_target_system_state);
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static bool pwr_btn_event_pending;
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/*
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* The ACPI specification wants us to save NVS memory regions during hibernation
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* and to restore them during the subsequent resume. Windows does that also for
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* suspend to RAM. However, it is known that this mechanism does not work on
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* all machines, so we allow the user to disable it with the help of the
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* 'acpi_sleep=nonvs' kernel command line option.
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*/
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static bool nvs_nosave;
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void __init acpi_nvs_nosave(void)
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{
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nvs_nosave = true;
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}
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/*
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* The ACPI specification wants us to save NVS memory regions during hibernation
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* but says nothing about saving NVS during S3. Not all versions of Windows
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* save NVS on S3 suspend either, and it is clear that not all systems need
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* NVS to be saved at S3 time. To improve suspend/resume time, allow the
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* user to disable saving NVS on S3 if their system does not require it, but
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* continue to save/restore NVS for S4 as specified.
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*/
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static bool nvs_nosave_s3;
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void __init acpi_nvs_nosave_s3(void)
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{
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nvs_nosave_s3 = true;
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}
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static int __init init_nvs_save_s3(const struct dmi_system_id *d)
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{
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nvs_nosave_s3 = false;
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return 0;
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}
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/*
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* ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
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* user to request that behavior by using the 'acpi_old_suspend_ordering'
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* kernel command line option that causes the following variable to be set.
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*/
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static bool old_suspend_ordering;
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void __init acpi_old_suspend_ordering(void)
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{
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old_suspend_ordering = true;
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}
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static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
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{
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acpi_old_suspend_ordering();
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return 0;
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}
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static int __init init_nvs_nosave(const struct dmi_system_id *d)
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{
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acpi_nvs_nosave();
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return 0;
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}
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static bool acpi_sleep_default_s3;
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static int __init init_default_s3(const struct dmi_system_id *d)
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{
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acpi_sleep_default_s3 = true;
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return 0;
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}
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static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
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{
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.callback = init_old_suspend_ordering,
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.ident = "Abit KN9 (nForce4 variant)",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
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DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "HP xw4600 Workstation",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "M2N8L"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Panasonic CF51-2L",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR,
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"Matsushita Electric Industrial Co.,Ltd."),
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DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW41E_H",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW21E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW21M",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB17FX",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-SR11M",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Everex StepNote Series",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB1Z1E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-NW130D",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCCW29FX",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Averatec AV1020-ED2",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),
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DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus A8N-SLI DELUXE",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus A8N-SLI Premium",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-SR26GN_P",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB1S1E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW520F",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Asus K54C",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "K54C"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Asus K54HR",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
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},
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},
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{
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.callback = init_nvs_save_s3,
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.ident = "Asus 1025C",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
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DMI_MATCH(DMI_PRODUCT_NAME, "1025C"),
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},
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},
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/*
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* https://bugzilla.kernel.org/show_bug.cgi?id=189431
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* Lenovo G50-45 is a platform later than 2012, but needs nvs memory
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* saving during S3.
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*/
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{
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.callback = init_nvs_save_s3,
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.ident = "Lenovo G50-45",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
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},
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},
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/*
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* ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using
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* the Low Power S0 Idle firmware interface (see
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* https://bugzilla.kernel.org/show_bug.cgi?id=199057).
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*/
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{
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.callback = init_default_s3,
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.ident = "ThinkPad X1 Tablet(2016)",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"),
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},
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},
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{},
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};
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static bool ignore_blacklist;
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void __init acpi_sleep_no_blacklist(void)
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{
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ignore_blacklist = true;
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}
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static void __init acpi_sleep_dmi_check(void)
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{
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if (ignore_blacklist)
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return;
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if (dmi_get_bios_year() >= 2012)
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acpi_nvs_nosave_s3();
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dmi_check_system(acpisleep_dmi_table);
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}
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/**
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* acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
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*/
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static int acpi_pm_freeze(void)
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{
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acpi_disable_all_gpes();
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acpi_os_wait_events_complete();
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acpi_ec_block_transactions();
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return 0;
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}
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/**
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* acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
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*/
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static int acpi_pm_pre_suspend(void)
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{
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acpi_pm_freeze();
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return suspend_nvs_save();
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}
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/**
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* __acpi_pm_prepare - Prepare the platform to enter the target state.
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*
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* If necessary, set the firmware waking vector and do arch-specific
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* nastiness to get the wakeup code to the waking vector.
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*/
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static int __acpi_pm_prepare(void)
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{
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int error = acpi_sleep_prepare(acpi_target_sleep_state);
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if (error)
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acpi_target_sleep_state = ACPI_STATE_S0;
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return error;
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}
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|
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/**
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* acpi_pm_prepare - Prepare the platform to enter the target sleep
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* state and disable the GPEs.
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*/
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static int acpi_pm_prepare(void)
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{
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int error = __acpi_pm_prepare();
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if (!error)
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error = acpi_pm_pre_suspend();
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return error;
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}
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|
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/**
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* acpi_pm_finish - Instruct the platform to leave a sleep state.
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*
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* This is called after we wake back up (or if entering the sleep state
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* failed).
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*/
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static void acpi_pm_finish(void)
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{
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struct acpi_device *pwr_btn_adev;
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u32 acpi_state = acpi_target_sleep_state;
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acpi_ec_unblock_transactions();
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suspend_nvs_free();
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|
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if (acpi_state == ACPI_STATE_S0)
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return;
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printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
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acpi_state);
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acpi_disable_wakeup_devices(acpi_state);
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acpi_leave_sleep_state(acpi_state);
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/* reset firmware waking vector */
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acpi_set_waking_vector(0);
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acpi_target_sleep_state = ACPI_STATE_S0;
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acpi_resume_power_resources();
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|
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/* If we were woken with the fixed power button, provide a small
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* hint to userspace in the form of a wakeup event on the fixed power
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* button device (if it can be found).
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*
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* We delay the event generation til now, as the PM layer requires
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* timekeeping to be running before we generate events. */
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if (!pwr_btn_event_pending)
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return;
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pwr_btn_event_pending = false;
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pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF,
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NULL, -1);
|
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if (pwr_btn_adev) {
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pm_wakeup_event(&pwr_btn_adev->dev, 0);
|
|
acpi_dev_put(pwr_btn_adev);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* acpi_pm_start - Start system PM transition.
|
|
*/
|
|
static void acpi_pm_start(u32 acpi_state)
|
|
{
|
|
acpi_target_sleep_state = acpi_state;
|
|
acpi_sleep_tts_switch(acpi_target_sleep_state);
|
|
acpi_scan_lock_acquire();
|
|
}
|
|
|
|
/**
|
|
* acpi_pm_end - Finish up system PM transition.
|
|
*/
|
|
static void acpi_pm_end(void)
|
|
{
|
|
acpi_turn_off_unused_power_resources();
|
|
acpi_scan_lock_release();
|
|
/*
|
|
* 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 sleep_no_lps0 (1)
|
|
#define acpi_target_sleep_state ACPI_STATE_S0
|
|
#define acpi_sleep_default_s3 (1)
|
|
static inline void acpi_sleep_dmi_check(void) {}
|
|
#endif /* CONFIG_ACPI_SLEEP */
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
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;
|
|
|
|
error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();
|
|
if (error)
|
|
return error;
|
|
|
|
if (!sleep_states[acpi_state]) {
|
|
pr_err("ACPI does not support sleep state S%u\n", acpi_state);
|
|
return -ENOSYS;
|
|
}
|
|
if (acpi_state > ACPI_STATE_S1)
|
|
pm_set_suspend_via_firmware();
|
|
|
|
acpi_pm_start(acpi_state);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
u32 acpi_state = acpi_target_sleep_state;
|
|
int error;
|
|
|
|
ACPI_FLUSH_CPU_CACHE();
|
|
|
|
trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true);
|
|
switch (acpi_state) {
|
|
case ACPI_STATE_S1:
|
|
barrier();
|
|
status = acpi_enter_sleep_state(acpi_state);
|
|
break;
|
|
|
|
case ACPI_STATE_S3:
|
|
if (!acpi_suspend_lowlevel)
|
|
return -ENOSYS;
|
|
error = acpi_suspend_lowlevel();
|
|
if (error)
|
|
return error;
|
|
pr_info(PREFIX "Low-level resume complete\n");
|
|
pm_set_resume_via_firmware();
|
|
break;
|
|
}
|
|
trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false);
|
|
|
|
/* This violates the spec but is required for bug compatibility. */
|
|
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
|
|
|
|
/* Reprogram control registers */
|
|
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 ]
|
|
*
|
|
* However, we do generate a small hint for userspace in the form of
|
|
* a wakeup event. We flag this condition for now and generate the
|
|
* event later, as we're currently too early in resume to be able to
|
|
* generate wakeup events.
|
|
*/
|
|
if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
|
|
acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED;
|
|
|
|
acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status);
|
|
|
|
if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) {
|
|
acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
|
|
/* Flag for later */
|
|
pwr_btn_event_pending = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_disable_all_gpes();
|
|
/* Allow EC transactions to happen. */
|
|
acpi_ec_unblock_transactions();
|
|
|
|
suspend_nvs_restore();
|
|
|
|
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 const struct platform_suspend_ops acpi_suspend_ops = {
|
|
.valid = acpi_suspend_state_valid,
|
|
.begin = acpi_suspend_begin,
|
|
.prepare_late = acpi_pm_prepare,
|
|
.enter = acpi_suspend_enter,
|
|
.wake = 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 const struct platform_suspend_ops acpi_suspend_ops_old = {
|
|
.valid = acpi_suspend_state_valid,
|
|
.begin = acpi_suspend_begin_old,
|
|
.prepare_late = acpi_pm_pre_suspend,
|
|
.enter = acpi_suspend_enter,
|
|
.wake = acpi_pm_finish,
|
|
.end = acpi_pm_end,
|
|
.recover = acpi_pm_finish,
|
|
};
|
|
|
|
static bool s2idle_wakeup;
|
|
|
|
/*
|
|
* On platforms supporting the Low Power S0 Idle interface there is an ACPI
|
|
* device object with the PNP0D80 compatible device ID (System Power Management
|
|
* Controller) and a specific _DSM method under it. That method, if present,
|
|
* can be used to indicate to the platform that the OS is transitioning into a
|
|
* low-power state in which certain types of activity are not desirable or that
|
|
* it is leaving such a state, which allows the platform to adjust its operation
|
|
* mode accordingly.
|
|
*/
|
|
static const struct acpi_device_id lps0_device_ids[] = {
|
|
{"PNP0D80", },
|
|
{"", },
|
|
};
|
|
|
|
#define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"
|
|
|
|
#define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1
|
|
#define ACPI_LPS0_SCREEN_OFF 3
|
|
#define ACPI_LPS0_SCREEN_ON 4
|
|
#define ACPI_LPS0_ENTRY 5
|
|
#define ACPI_LPS0_EXIT 6
|
|
|
|
static acpi_handle lps0_device_handle;
|
|
static guid_t lps0_dsm_guid;
|
|
static char lps0_dsm_func_mask;
|
|
|
|
/* Device constraint entry structure */
|
|
struct lpi_device_info {
|
|
char *name;
|
|
int enabled;
|
|
union acpi_object *package;
|
|
};
|
|
|
|
/* Constraint package structure */
|
|
struct lpi_device_constraint {
|
|
int uid;
|
|
int min_dstate;
|
|
int function_states;
|
|
};
|
|
|
|
struct lpi_constraints {
|
|
acpi_handle handle;
|
|
int min_dstate;
|
|
};
|
|
|
|
static struct lpi_constraints *lpi_constraints_table;
|
|
static int lpi_constraints_table_size;
|
|
|
|
static void lpi_device_get_constraints(void)
|
|
{
|
|
union acpi_object *out_obj;
|
|
int i;
|
|
|
|
out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid,
|
|
1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS,
|
|
NULL, ACPI_TYPE_PACKAGE);
|
|
|
|
acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n",
|
|
out_obj ? "successful" : "failed");
|
|
|
|
if (!out_obj)
|
|
return;
|
|
|
|
lpi_constraints_table = kcalloc(out_obj->package.count,
|
|
sizeof(*lpi_constraints_table),
|
|
GFP_KERNEL);
|
|
if (!lpi_constraints_table)
|
|
goto free_acpi_buffer;
|
|
|
|
acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n");
|
|
|
|
for (i = 0; i < out_obj->package.count; i++) {
|
|
struct lpi_constraints *constraint;
|
|
acpi_status status;
|
|
union acpi_object *package = &out_obj->package.elements[i];
|
|
struct lpi_device_info info = { };
|
|
int package_count = 0, j;
|
|
|
|
if (!package)
|
|
continue;
|
|
|
|
for (j = 0; j < package->package.count; ++j) {
|
|
union acpi_object *element =
|
|
&(package->package.elements[j]);
|
|
|
|
switch (element->type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
info.enabled = element->integer.value;
|
|
break;
|
|
case ACPI_TYPE_STRING:
|
|
info.name = element->string.pointer;
|
|
break;
|
|
case ACPI_TYPE_PACKAGE:
|
|
package_count = element->package.count;
|
|
info.package = element->package.elements;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!info.enabled || !info.package || !info.name)
|
|
continue;
|
|
|
|
constraint = &lpi_constraints_table[lpi_constraints_table_size];
|
|
|
|
status = acpi_get_handle(NULL, info.name, &constraint->handle);
|
|
if (ACPI_FAILURE(status))
|
|
continue;
|
|
|
|
acpi_handle_debug(lps0_device_handle,
|
|
"index:%d Name:%s\n", i, info.name);
|
|
|
|
constraint->min_dstate = -1;
|
|
|
|
for (j = 0; j < package_count; ++j) {
|
|
union acpi_object *info_obj = &info.package[j];
|
|
union acpi_object *cnstr_pkg;
|
|
union acpi_object *obj;
|
|
struct lpi_device_constraint dev_info;
|
|
|
|
switch (info_obj->type) {
|
|
case ACPI_TYPE_INTEGER:
|
|
/* version */
|
|
break;
|
|
case ACPI_TYPE_PACKAGE:
|
|
if (info_obj->package.count < 2)
|
|
break;
|
|
|
|
cnstr_pkg = info_obj->package.elements;
|
|
obj = &cnstr_pkg[0];
|
|
dev_info.uid = obj->integer.value;
|
|
obj = &cnstr_pkg[1];
|
|
dev_info.min_dstate = obj->integer.value;
|
|
|
|
acpi_handle_debug(lps0_device_handle,
|
|
"uid:%d min_dstate:%s\n",
|
|
dev_info.uid,
|
|
acpi_power_state_string(dev_info.min_dstate));
|
|
|
|
constraint->min_dstate = dev_info.min_dstate;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (constraint->min_dstate < 0) {
|
|
acpi_handle_debug(lps0_device_handle,
|
|
"Incomplete constraint defined\n");
|
|
continue;
|
|
}
|
|
|
|
lpi_constraints_table_size++;
|
|
}
|
|
|
|
acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n");
|
|
|
|
free_acpi_buffer:
|
|
ACPI_FREE(out_obj);
|
|
}
|
|
|
|
static void lpi_check_constraints(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < lpi_constraints_table_size; ++i) {
|
|
acpi_handle handle = lpi_constraints_table[i].handle;
|
|
struct acpi_device *adev;
|
|
|
|
if (!handle || acpi_bus_get_device(handle, &adev))
|
|
continue;
|
|
|
|
acpi_handle_debug(handle,
|
|
"LPI: required min power state:%s current power state:%s\n",
|
|
acpi_power_state_string(lpi_constraints_table[i].min_dstate),
|
|
acpi_power_state_string(adev->power.state));
|
|
|
|
if (!adev->flags.power_manageable) {
|
|
acpi_handle_info(handle, "LPI: Device not power manageable\n");
|
|
lpi_constraints_table[i].handle = NULL;
|
|
continue;
|
|
}
|
|
|
|
if (adev->power.state < lpi_constraints_table[i].min_dstate)
|
|
acpi_handle_info(handle,
|
|
"LPI: Constraint not met; min power state:%s current power state:%s\n",
|
|
acpi_power_state_string(lpi_constraints_table[i].min_dstate),
|
|
acpi_power_state_string(adev->power.state));
|
|
}
|
|
}
|
|
|
|
static void acpi_sleep_run_lps0_dsm(unsigned int func)
|
|
{
|
|
union acpi_object *out_obj;
|
|
|
|
if (!(lps0_dsm_func_mask & (1 << func)))
|
|
return;
|
|
|
|
out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL);
|
|
ACPI_FREE(out_obj);
|
|
|
|
acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n",
|
|
func, out_obj ? "successful" : "failed");
|
|
}
|
|
|
|
static int lps0_device_attach(struct acpi_device *adev,
|
|
const struct acpi_device_id *not_used)
|
|
{
|
|
union acpi_object *out_obj;
|
|
|
|
if (lps0_device_handle)
|
|
return 0;
|
|
|
|
if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
|
|
return 0;
|
|
|
|
guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid);
|
|
/* Check if the _DSM is present and as expected. */
|
|
out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);
|
|
if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) {
|
|
acpi_handle_debug(adev->handle,
|
|
"_DSM function 0 evaluation failed\n");
|
|
return 0;
|
|
}
|
|
|
|
lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer;
|
|
|
|
ACPI_FREE(out_obj);
|
|
|
|
acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
|
|
lps0_dsm_func_mask);
|
|
|
|
lps0_device_handle = adev->handle;
|
|
|
|
lpi_device_get_constraints();
|
|
|
|
/*
|
|
* Use suspend-to-idle by default if the default suspend mode was not
|
|
* set from the command line.
|
|
*/
|
|
if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3)
|
|
mem_sleep_current = PM_SUSPEND_TO_IDLE;
|
|
|
|
/*
|
|
* Some LPS0 systems, like ASUS Zenbook UX430UNR/i7-8550U, require the
|
|
* EC GPE to be enabled while suspended for certain wakeup devices to
|
|
* work, so mark it as wakeup-capable.
|
|
*/
|
|
acpi_ec_mark_gpe_for_wake();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct acpi_scan_handler lps0_handler = {
|
|
.ids = lps0_device_ids,
|
|
.attach = lps0_device_attach,
|
|
};
|
|
|
|
static int acpi_s2idle_begin(void)
|
|
{
|
|
acpi_scan_lock_acquire();
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_s2idle_prepare(void)
|
|
{
|
|
if (acpi_sci_irq_valid()) {
|
|
enable_irq_wake(acpi_sci_irq);
|
|
acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE);
|
|
}
|
|
|
|
acpi_enable_wakeup_devices(ACPI_STATE_S0);
|
|
|
|
/* Change the configuration of GPEs to avoid spurious wakeup. */
|
|
acpi_enable_all_wakeup_gpes();
|
|
acpi_os_wait_events_complete();
|
|
|
|
s2idle_wakeup = true;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_s2idle_prepare_late(void)
|
|
{
|
|
if (!lps0_device_handle || sleep_no_lps0)
|
|
return 0;
|
|
|
|
if (pm_debug_messages_on)
|
|
lpi_check_constraints();
|
|
|
|
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
|
|
acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_s2idle_sync(void)
|
|
{
|
|
/*
|
|
* The EC driver uses the system workqueue and an additional special
|
|
* one, so those need to be flushed too.
|
|
*/
|
|
acpi_ec_flush_work();
|
|
acpi_os_wait_events_complete(); /* synchronize Notify handling */
|
|
}
|
|
|
|
static void acpi_s2idle_wake(void)
|
|
{
|
|
/*
|
|
* If IRQD_WAKEUP_ARMED is set for the SCI at this point, the SCI has
|
|
* not triggered while suspended, so bail out.
|
|
*/
|
|
if (!acpi_sci_irq_valid() ||
|
|
irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq)))
|
|
return;
|
|
|
|
/*
|
|
* If there are EC events to process, the wakeup may be a spurious one
|
|
* coming from the EC.
|
|
*/
|
|
if (acpi_ec_dispatch_gpe()) {
|
|
/*
|
|
* Cancel the wakeup and process all pending events in case
|
|
* there are any wakeup ones in there.
|
|
*
|
|
* Note that if any non-EC GPEs are active at this point, the
|
|
* SCI will retrigger after the rearming below, so no events
|
|
* should be missed by canceling the wakeup here.
|
|
*/
|
|
pm_system_cancel_wakeup();
|
|
|
|
acpi_s2idle_sync();
|
|
|
|
rearm_wake_irq(acpi_sci_irq);
|
|
}
|
|
}
|
|
|
|
static void acpi_s2idle_restore_early(void)
|
|
{
|
|
if (!lps0_device_handle || sleep_no_lps0)
|
|
return;
|
|
|
|
acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
|
|
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
|
|
}
|
|
|
|
static void acpi_s2idle_restore(void)
|
|
{
|
|
/*
|
|
* Drain pending events before restoring the working-state configuration
|
|
* of GPEs.
|
|
*/
|
|
acpi_os_wait_events_complete(); /* synchronize GPE processing */
|
|
acpi_s2idle_sync();
|
|
|
|
s2idle_wakeup = false;
|
|
|
|
acpi_enable_all_runtime_gpes();
|
|
|
|
acpi_disable_wakeup_devices(ACPI_STATE_S0);
|
|
|
|
if (acpi_sci_irq_valid()) {
|
|
acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
|
|
disable_irq_wake(acpi_sci_irq);
|
|
}
|
|
}
|
|
|
|
static void acpi_s2idle_end(void)
|
|
{
|
|
acpi_scan_lock_release();
|
|
}
|
|
|
|
static const struct platform_s2idle_ops acpi_s2idle_ops = {
|
|
.begin = acpi_s2idle_begin,
|
|
.prepare = acpi_s2idle_prepare,
|
|
.prepare_late = acpi_s2idle_prepare_late,
|
|
.wake = acpi_s2idle_wake,
|
|
.restore_early = acpi_s2idle_restore_early,
|
|
.restore = acpi_s2idle_restore,
|
|
.end = acpi_s2idle_end,
|
|
};
|
|
|
|
static void acpi_sleep_suspend_setup(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++)
|
|
if (acpi_sleep_state_supported(i))
|
|
sleep_states[i] = 1;
|
|
|
|
suspend_set_ops(old_suspend_ordering ?
|
|
&acpi_suspend_ops_old : &acpi_suspend_ops);
|
|
|
|
acpi_scan_add_handler(&lps0_handler);
|
|
s2idle_set_ops(&acpi_s2idle_ops);
|
|
}
|
|
|
|
#else /* !CONFIG_SUSPEND */
|
|
#define s2idle_wakeup (false)
|
|
#define lps0_device_handle (NULL)
|
|
static inline void acpi_sleep_suspend_setup(void) {}
|
|
#endif /* !CONFIG_SUSPEND */
|
|
|
|
bool acpi_s2idle_wakeup(void)
|
|
{
|
|
return s2idle_wakeup;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static u32 saved_bm_rld;
|
|
|
|
static int acpi_save_bm_rld(void)
|
|
{
|
|
acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_restore_bm_rld(void)
|
|
{
|
|
u32 resumed_bm_rld = 0;
|
|
|
|
acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
|
|
if (resumed_bm_rld == saved_bm_rld)
|
|
return;
|
|
|
|
acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
|
|
}
|
|
|
|
static struct syscore_ops acpi_sleep_syscore_ops = {
|
|
.suspend = acpi_save_bm_rld,
|
|
.resume = acpi_restore_bm_rld,
|
|
};
|
|
|
|
static void acpi_sleep_syscore_init(void)
|
|
{
|
|
register_syscore_ops(&acpi_sleep_syscore_ops);
|
|
}
|
|
#else
|
|
static inline void acpi_sleep_syscore_init(void) {}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
#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(pm_message_t stage)
|
|
{
|
|
if (!nvs_nosave) {
|
|
int error = suspend_nvs_alloc();
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (stage.event == PM_EVENT_HIBERNATE)
|
|
pm_set_suspend_via_firmware();
|
|
|
|
acpi_pm_start(ACPI_STATE_S4);
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_hibernation_enter(void)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FLUSH_CPU_CACHE();
|
|
|
|
/* This shouldn't return. If it returns, we have a problem */
|
|
status = acpi_enter_sleep_state(ACPI_STATE_S4);
|
|
/* Reprogram control registers */
|
|
acpi_leave_sleep_state_prep(ACPI_STATE_S4);
|
|
|
|
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
|
|
}
|
|
|
|
static void acpi_hibernation_leave(void)
|
|
{
|
|
pm_set_resume_via_firmware();
|
|
/*
|
|
* If ACPI is not enabled by the BIOS and the boot kernel, we need to
|
|
* enable it here.
|
|
*/
|
|
acpi_enable();
|
|
/* Reprogram control registers */
|
|
acpi_leave_sleep_state_prep(ACPI_STATE_S4);
|
|
/* Check the hardware signature */
|
|
if (facs && s4_hardware_signature != facs->hardware_signature)
|
|
pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n");
|
|
/* Restore the NVS memory area */
|
|
suspend_nvs_restore();
|
|
/* Allow EC transactions to happen. */
|
|
acpi_ec_unblock_transactions();
|
|
}
|
|
|
|
static void acpi_pm_thaw(void)
|
|
{
|
|
acpi_ec_unblock_transactions();
|
|
acpi_enable_all_runtime_gpes();
|
|
}
|
|
|
|
static const 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_freeze,
|
|
.restore_cleanup = acpi_pm_thaw,
|
|
};
|
|
|
|
/**
|
|
* 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(pm_message_t stage)
|
|
{
|
|
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)
|
|
return error;
|
|
|
|
if (!nvs_nosave) {
|
|
error = suspend_nvs_alloc();
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (stage.event == PM_EVENT_HIBERNATE)
|
|
pm_set_suspend_via_firmware();
|
|
|
|
acpi_target_sleep_state = ACPI_STATE_S4;
|
|
acpi_scan_lock_acquire();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
|
|
* been requested.
|
|
*/
|
|
static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
|
|
.begin = acpi_hibernation_begin_old,
|
|
.end = acpi_pm_end,
|
|
.pre_snapshot = acpi_pm_pre_suspend,
|
|
.prepare = acpi_pm_freeze,
|
|
.finish = acpi_pm_finish,
|
|
.enter = acpi_hibernation_enter,
|
|
.leave = acpi_hibernation_leave,
|
|
.pre_restore = acpi_pm_freeze,
|
|
.restore_cleanup = acpi_pm_thaw,
|
|
.recover = acpi_pm_finish,
|
|
};
|
|
|
|
static void acpi_sleep_hibernate_setup(void)
|
|
{
|
|
if (!acpi_sleep_state_supported(ACPI_STATE_S4))
|
|
return;
|
|
|
|
hibernation_set_ops(old_suspend_ordering ?
|
|
&acpi_hibernation_ops_old : &acpi_hibernation_ops);
|
|
sleep_states[ACPI_STATE_S4] = 1;
|
|
if (nosigcheck)
|
|
return;
|
|
|
|
acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs);
|
|
if (facs)
|
|
s4_hardware_signature = facs->hardware_signature;
|
|
}
|
|
#else /* !CONFIG_HIBERNATION */
|
|
static inline void acpi_sleep_hibernate_setup(void) {}
|
|
#endif /* !CONFIG_HIBERNATION */
|
|
|
|
static void acpi_power_off_prepare(void)
|
|
{
|
|
/* Prepare to power off the system */
|
|
acpi_sleep_prepare(ACPI_STATE_S5);
|
|
acpi_disable_all_gpes();
|
|
acpi_os_wait_events_complete();
|
|
}
|
|
|
|
static void acpi_power_off(void)
|
|
{
|
|
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
|
|
printk(KERN_DEBUG "%s called\n", __func__);
|
|
local_irq_disable();
|
|
acpi_enter_sleep_state(ACPI_STATE_S5);
|
|
}
|
|
|
|
int __init acpi_sleep_init(void)
|
|
{
|
|
char supported[ACPI_S_STATE_COUNT * 3 + 1];
|
|
char *pos = supported;
|
|
int i;
|
|
|
|
acpi_sleep_dmi_check();
|
|
|
|
sleep_states[ACPI_STATE_S0] = 1;
|
|
|
|
acpi_sleep_syscore_init();
|
|
acpi_sleep_suspend_setup();
|
|
acpi_sleep_hibernate_setup();
|
|
|
|
if (acpi_sleep_state_supported(ACPI_STATE_S5)) {
|
|
sleep_states[ACPI_STATE_S5] = 1;
|
|
pm_power_off_prepare = acpi_power_off_prepare;
|
|
pm_power_off = acpi_power_off;
|
|
} else {
|
|
acpi_no_s5 = true;
|
|
}
|
|
|
|
supported[0] = 0;
|
|
for (i = 0; i < ACPI_S_STATE_COUNT; i++) {
|
|
if (sleep_states[i])
|
|
pos += sprintf(pos, " S%d", i);
|
|
}
|
|
pr_info(PREFIX "(supports%s)\n", supported);
|
|
|
|
/*
|
|
* 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;
|
|
}
|