1 // SPDX-License-Identifier: GPL-2.0-only
3  * sleep.c - ACPI sleep support.
7  * Copyright (c) 2000-2003 Patrick Mochel
30  * Some HW-full platforms do not have _S5, so they may need
72 	/* do we have a wakeup address for S2 and S3? */  in acpi_sleep_prepare()
76 			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"),
370 	 * Lenovo G50-45 is a platform later than 2012, but needs nvs memory
375 	.ident = "Lenovo G50-45",
383 	.ident = "Lenovo G40-45",
390 	 * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using
424  * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
435  * acpi_pm_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
444  *	__acpi_pm_prepare - Prepare the platform to enter the target state.
446  *	If necessary, set the firmware waking vector and do arch-specific
447  *	nastiness to get the wakeup code to the waking vector.
459  *	acpi_pm_prepare - Prepare the platform to enter the target sleep
472  *	acpi_pm_finish - Instruct the platform to leave a sleep state.
500 	 * hint to userspace in the form of a wakeup event on the fixed power  in acpi_pm_finish()
510 						    NULL, -1);  in acpi_pm_finish()
512 		pm_wakeup_event(&pwr_btn_adev->dev, 0);  in acpi_pm_finish()
518  * acpi_pm_start - Start system PM transition.
529  * acpi_pm_end - Finish up system PM transition.
558  * acpi_suspend_begin - Set the target system sleep state to the state
573 		return -ENOSYS;  in acpi_suspend_begin()
583  *	acpi_suspend_enter - Actually enter a sleep state.
586  *	Flush caches and go to sleep. For STR we have to call arch-specific
605 			return -ENOSYS;  in acpi_suspend_enter()
609 		pr_info("Low-level resume complete\n");  in acpi_suspend_enter()
626 	 * a wakeup event. We flag this condition for now and generate the  in acpi_suspend_enter()
628 	 * generate wakeup events.  in acpi_suspend_enter()
644 	 * enabled. Some GPEs (like wakeup GPEs) have no handlers and this can  in acpi_suspend_enter()
652 	 * if there is no contention, so avoid doing that by using a low-level  in acpi_suspend_enter()
661 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;  in acpi_suspend_enter()
690  * acpi_suspend_begin_old - Set the target system sleep state to the
692  *	execute the _PTS control method.  This function is used if the
693  *	pre-ACPI 2.0 suspend ordering has been requested.
706  * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
734 			pr_warn("Warning: Failed to enable wakeup from IRQ %d: %d\n",  in acpi_s2idle_prepare()
742 	/* Change the configuration of GPEs to avoid spurious wakeup. */  in acpi_s2idle_prepare()
759 		 * wakeup is pending anyway and the SCI is not the source of  in acpi_s2idle_wake()
763 			pm_pr_dbg("Wakeup unrelated to ACPI SCI\n");  in acpi_s2idle_wake()
769 		 * wakeup is regarded as valid.  in acpi_s2idle_wake()
772 			pm_pr_dbg("ACPI fixed event wakeup\n");  in acpi_s2idle_wake()
778 			pm_pr_dbg("ACPI custom handler wakeup\n");  in acpi_s2idle_wake()
783 		 * Check non-EC GPE wakeups and if there are none, cancel the  in acpi_s2idle_wake()
784 		 * SCI-related wakeup and dispatch the EC GPE.  in acpi_s2idle_wake()
787 			pm_pr_dbg("ACPI non-EC GPE wakeup\n");  in acpi_s2idle_wake()
795 		 * new wakeup events till the rearming below, so if any of them  in acpi_s2idle_wake()
800 			pm_pr_dbg("Wakeup after ACPI Notify sync\n");  in acpi_s2idle_wake()
804 		pm_pr_dbg("Rearming ACPI SCI for wakeup\n");  in acpi_s2idle_wake()
816 	 * Drain pending events before restoring the working-state configuration  in acpi_s2idle_restore()
851 		pr_info("Efficient low-power S0 idle declared\n");  in acpi_s2idle_setup()
920 int acpi_check_s4_hw_signature = -1; /* Default behaviour is just to warn */
946 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;  in acpi_hibernation_enter()
960 	if (facs && s4_hardware_signature != facs->hardware_signature)  in acpi_hibernation_leave()
987  * acpi_hibernation_begin_old - Set the target system sleep state to
988  *	ACPI_STATE_S4 and execute the _PTS control method.  This
989  *	function is used if the pre-ACPI 2.0 suspend ordering has been
1022  * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
1056 		s4_hardware_signature = facs->hardware_signature;  in acpi_sleep_hibernate_setup()
1065 			swsusp_hardware_signature = facs->hardware_signature;  in acpi_sleep_hibernate_setup()