1 // SPDX-License-Identifier: GPL-2.0-only
3  * sleep.c - ACPI sleep support.
7  * Copyright (c) 2000-2003 Patrick Mochel
28  * Some HW-full platforms do not have _S5, so they may need
66 	/* do we have a wakeup address for S2 and S3? */  in acpi_sleep_prepare()
70 			return -EFAULT;  in acpi_sleep_prepare()
182 		DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
189 		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
195 	.ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
203 	.ident = "Panasonic CF51-2L",
207 		DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
212 	.ident = "Sony Vaio VGN-FW41E_H",
215 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
220 	.ident = "Sony Vaio VGN-FW21E",
223 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
228 	.ident = "Sony Vaio VGN-FW21M",
231 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"),
244 	.ident = "Sony Vaio VGN-SR11M",
247 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
268 	.ident = "Sony Vaio VGN-NW130D",
271 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
284 	.ident = "Averatec AV1020-ED2",
292 	.ident = "Asus A8N-SLI DELUXE",
295 		DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
300 	.ident = "Asus A8N-SLI Premium",
303 		DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
308 	.ident = "Sony Vaio VGN-SR26GN_P",
311 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
324 	.ident = "Sony Vaio VGN-FW520F",
327 		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
356 	 * Lenovo G50-45 is a platform later than 2012, but needs nvs memory
361 	.ident = "Lenovo G50-45",
369 	.ident = "Lenovo G40-45",
376 	 * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using
422  * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
433  * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
442  *	__acpi_pm_prepare - Prepare the platform to enter the target state.
444  *	If necessary, set the firmware waking vector and do arch-specific
445  *	nastiness to get the wakeup code to the waking vector.
457  *	acpi_pm_prepare - Prepare the platform to enter the target sleep
470  *	acpi_pm_finish - Instruct the platform to leave a sleep state.
499 	 * hint to userspace in the form of a wakeup event on the fixed power  in acpi_pm_finish()
509 						    NULL, -1);  in acpi_pm_finish()
511 		pm_wakeup_event(&pwr_btn_adev->dev, 0);  in acpi_pm_finish()
517  * acpi_pm_start - Start system PM transition.
527  * acpi_pm_end - Finish up system PM transition.
556  *	acpi_suspend_begin - Set the target system sleep state to the state
570 		return -ENOSYS;  in acpi_suspend_begin()
580  *	acpi_suspend_enter - Actually enter a sleep state.
583  *	Flush caches and go to sleep. For STR we have to call arch-specific
604 			return -ENOSYS;  in acpi_suspend_enter()
608 		pr_info(PREFIX "Low-level resume complete\n");  in acpi_suspend_enter()
625 	 * a wakeup event. We flag this condition for now and generate the  in acpi_suspend_enter()
627 	 * generate wakeup events.  in acpi_suspend_enter()
643 	 * (like wakeup GPE) haven't handler, this can avoid such GPE misfire.  in acpi_suspend_enter()
652 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;  in acpi_suspend_enter()
681  *	acpi_suspend_begin_old - Set the target system sleep state to the
683  *		execute the _PTS control method.  This function is used if the
684  *		pre-ACPI 2.0 suspend ordering has been requested.
696  * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
714  * Controller) and a specific _DSM method under it.  That method, if present,
716  * low-power state in which certain types of activity are not desirable or that
725 #define ACPI_LPS0_DSM_UUID	"c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"
774 	lpi_constraints_table = kcalloc(out_obj->package.count,  in lpi_device_get_constraints()
782 	for (i = 0; i < out_obj->package.count; i++) {  in lpi_device_get_constraints()
785 		union acpi_object *package = &out_obj->package.elements[i];  in lpi_device_get_constraints()
792 		for (j = 0; j < package->package.count; ++j) {  in lpi_device_get_constraints()
794 					&(package->package.elements[j]);  in lpi_device_get_constraints()
796 			switch (element->type) {  in lpi_device_get_constraints()
798 				info.enabled = element->integer.value;  in lpi_device_get_constraints()
801 				info.name = element->string.pointer;  in lpi_device_get_constraints()
804 				package_count = element->package.count;  in lpi_device_get_constraints()
805 				info.package = element->package.elements;  in lpi_device_get_constraints()
815 		status = acpi_get_handle(NULL, info.name, &constraint->handle);  in lpi_device_get_constraints()
822 		constraint->min_dstate = -1;  in lpi_device_get_constraints()
830 			switch (info_obj->type) {  in lpi_device_get_constraints()
835 				if (info_obj->package.count < 2)  in lpi_device_get_constraints()
838 				cnstr_pkg = info_obj->package.elements;  in lpi_device_get_constraints()
840 				dev_info.uid = obj->integer.value;  in lpi_device_get_constraints()
842 				dev_info.min_dstate = obj->integer.value;  in lpi_device_get_constraints()
849 				constraint->min_dstate = dev_info.min_dstate;  in lpi_device_get_constraints()
854 		if (constraint->min_dstate < 0) {  in lpi_device_get_constraints()
883 			acpi_power_state_string(adev->power.state));  in lpi_check_constraints()
885 		if (!adev->flags.power_manageable) {  in lpi_check_constraints()
891 		if (adev->power.state < lpi_constraints_table[i].min_dstate)  in lpi_check_constraints()
895 				acpi_power_state_string(adev->power.state));  in lpi_check_constraints()
926 	out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);  in lps0_device_attach()
927 	if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) {  in lps0_device_attach()
928 		acpi_handle_debug(adev->handle,  in lps0_device_attach()
933 	lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer;  in lps0_device_attach()
937 	acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",  in lps0_device_attach()
940 	lps0_device_handle = adev->handle;  in lps0_device_attach()
945 	 * Use suspend-to-idle by default if the default suspend mode was not  in lps0_device_attach()
952 	 * Some LPS0 systems, like ASUS Zenbook UX430UNR/i7-8550U, require the  in lps0_device_attach()
953 	 * EC GPE to be enabled while suspended for certain wakeup devices to  in lps0_device_attach()
954 	 * work, so mark it as wakeup-capable.  in lps0_device_attach()
981 	/* Change the configuration of GPEs to avoid spurious wakeup. */  in acpi_s2idle_prepare()
1012 		 * wakeup is pending anyway and the SCI is not the source of  in acpi_s2idle_wake()
1016 			pm_pr_dbg("Wakeup unrelated to ACPI SCI\n");  in acpi_s2idle_wake()
1022 		 * wakeup is regarded as valid.  in acpi_s2idle_wake()
1025 			pm_pr_dbg("ACPI fixed event wakeup\n");  in acpi_s2idle_wake()
1031 			pm_pr_dbg("ACPI custom handler wakeup\n");  in acpi_s2idle_wake()
1035 		/* Check non-EC GPE wakeups and dispatch the EC GPE. */  in acpi_s2idle_wake()
1037 			pm_pr_dbg("ACPI non-EC GPE wakeup\n");  in acpi_s2idle_wake()
1042 		 * Cancel the SCI wakeup and process all pending events in case  in acpi_s2idle_wake()
1043 		 * there are any wakeup ones in there.  in acpi_s2idle_wake()
1045 		 * Note that if any non-EC GPEs are active at this point, the  in acpi_s2idle_wake()
1047 		 * should be missed by canceling the wakeup here.  in acpi_s2idle_wake()
1054 		 * new wakeup events till the rearming below, so if any of them  in acpi_s2idle_wake()
1059 			pm_pr_dbg("Wakeup after ACPI Notify sync\n");  in acpi_s2idle_wake()
1082 	 * Drain pending events before restoring the working-state configuration  in acpi_s2idle_restore()
1211 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;  in acpi_hibernation_enter()
1225 	if (facs && s4_hardware_signature != facs->hardware_signature)  in acpi_hibernation_leave()
1252  *	acpi_hibernation_begin_old - Set the target system sleep state to
1253  *		ACPI_STATE_S4 and execute the _PTS control method.  This
1254  *		function is used if the pre-ACPI 2.0 suspend ordering has been
1286  * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
1315 		s4_hardware_signature = facs->hardware_signature;  in acpi_sleep_hibernate_setup()