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![Rafael J. Wysocki](/assets/img/avatar_default.png)
* acpi-pm: ACPI / bus: Move duplicate code to a separate new function mfd: Add support for Intel Sunrisepoint LPSS devices dmaengine: add a driver for Intel integrated DMA 64-bit mfd: make mfd_remove_devices() iterate in reverse order driver core: implement device_for_each_child_reverse() klist: implement klist_prev() Driver core: wakeup the parent device before trying probe ACPI / PM: Attach ACPI power domain only once PM / QoS: Make it possible to expose device latency tolerance to userspace ACPI / PM: Update the copyright notice and description of power.c
1104 lines
29 KiB
C
1104 lines
29 KiB
C
/*
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* acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
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*
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/sched.h>
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#include <linux/pm.h>
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#include <linux/device.h>
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#include <linux/proc_fs.h>
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#include <linux/acpi.h>
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#include <linux/slab.h>
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#include <linux/regulator/machine.h>
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#ifdef CONFIG_X86
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#include <asm/mpspec.h>
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#endif
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#include <linux/pci.h>
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#include <acpi/apei.h>
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#include <linux/dmi.h>
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#include <linux/suspend.h>
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#include "internal.h"
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#define _COMPONENT ACPI_BUS_COMPONENT
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ACPI_MODULE_NAME("bus");
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struct acpi_device *acpi_root;
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struct proc_dir_entry *acpi_root_dir;
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EXPORT_SYMBOL(acpi_root_dir);
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#ifdef CONFIG_X86
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#ifdef CONFIG_ACPI_CUSTOM_DSDT
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static inline int set_copy_dsdt(const struct dmi_system_id *id)
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{
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return 0;
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}
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#else
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static int set_copy_dsdt(const struct dmi_system_id *id)
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{
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printk(KERN_NOTICE "%s detected - "
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"force copy of DSDT to local memory\n", id->ident);
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acpi_gbl_copy_dsdt_locally = 1;
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return 0;
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}
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#endif
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static struct dmi_system_id dsdt_dmi_table[] __initdata = {
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/*
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* Invoke DSDT corruption work-around on all Toshiba Satellite.
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* https://bugzilla.kernel.org/show_bug.cgi?id=14679
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*/
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{
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.callback = set_copy_dsdt,
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.ident = "TOSHIBA Satellite",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
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},
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},
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{}
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};
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#else
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static struct dmi_system_id dsdt_dmi_table[] __initdata = {
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{}
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};
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#endif
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/* --------------------------------------------------------------------------
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Device Management
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-------------------------------------------------------------------------- */
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acpi_status acpi_bus_get_status_handle(acpi_handle handle,
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unsigned long long *sta)
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{
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acpi_status status;
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status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
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if (ACPI_SUCCESS(status))
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return AE_OK;
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if (status == AE_NOT_FOUND) {
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*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
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ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
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return AE_OK;
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}
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return status;
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}
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int acpi_bus_get_status(struct acpi_device *device)
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{
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acpi_status status;
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unsigned long long sta;
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status = acpi_bus_get_status_handle(device->handle, &sta);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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acpi_set_device_status(device, sta);
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if (device->status.functional && !device->status.present) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
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"functional but not present;\n",
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device->pnp.bus_id, (u32)sta));
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
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device->pnp.bus_id, (u32)sta));
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return 0;
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}
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EXPORT_SYMBOL(acpi_bus_get_status);
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void acpi_bus_private_data_handler(acpi_handle handle,
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void *context)
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{
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return;
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}
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EXPORT_SYMBOL(acpi_bus_private_data_handler);
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int acpi_bus_attach_private_data(acpi_handle handle, void *data)
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{
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acpi_status status;
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status = acpi_attach_data(handle,
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acpi_bus_private_data_handler, data);
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if (ACPI_FAILURE(status)) {
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acpi_handle_debug(handle, "Error attaching device data\n");
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return -ENODEV;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
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int acpi_bus_get_private_data(acpi_handle handle, void **data)
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{
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acpi_status status;
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if (!*data)
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return -EINVAL;
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status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
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if (ACPI_FAILURE(status)) {
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acpi_handle_debug(handle, "No context for object\n");
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return -ENODEV;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
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void acpi_bus_detach_private_data(acpi_handle handle)
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{
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acpi_detach_data(handle, acpi_bus_private_data_handler);
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}
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EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
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static void acpi_print_osc_error(acpi_handle handle,
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struct acpi_osc_context *context, char *error)
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{
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
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int i;
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if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
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printk(KERN_DEBUG "%s\n", error);
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else {
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printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
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kfree(buffer.pointer);
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}
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printk(KERN_DEBUG"_OSC request data:");
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for (i = 0; i < context->cap.length; i += sizeof(u32))
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printk("%x ", *((u32 *)(context->cap.pointer + i)));
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printk("\n");
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}
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acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
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{
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int i;
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static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
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24, 26, 28, 30, 32, 34};
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if (strlen(str) != 36)
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return AE_BAD_PARAMETER;
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for (i = 0; i < 36; i++) {
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if (i == 8 || i == 13 || i == 18 || i == 23) {
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if (str[i] != '-')
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return AE_BAD_PARAMETER;
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} else if (!isxdigit(str[i]))
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return AE_BAD_PARAMETER;
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}
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for (i = 0; i < 16; i++) {
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uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
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uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
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}
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return AE_OK;
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}
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EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
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acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
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{
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acpi_status status;
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struct acpi_object_list input;
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union acpi_object in_params[4];
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union acpi_object *out_obj;
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u8 uuid[16];
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u32 errors;
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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
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if (!context)
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return AE_ERROR;
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if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
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return AE_ERROR;
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context->ret.length = ACPI_ALLOCATE_BUFFER;
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context->ret.pointer = NULL;
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/* Setting up input parameters */
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input.count = 4;
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input.pointer = in_params;
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in_params[0].type = ACPI_TYPE_BUFFER;
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in_params[0].buffer.length = 16;
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in_params[0].buffer.pointer = uuid;
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in_params[1].type = ACPI_TYPE_INTEGER;
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in_params[1].integer.value = context->rev;
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in_params[2].type = ACPI_TYPE_INTEGER;
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in_params[2].integer.value = context->cap.length/sizeof(u32);
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in_params[3].type = ACPI_TYPE_BUFFER;
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in_params[3].buffer.length = context->cap.length;
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in_params[3].buffer.pointer = context->cap.pointer;
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status = acpi_evaluate_object(handle, "_OSC", &input, &output);
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if (ACPI_FAILURE(status))
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return status;
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if (!output.length)
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return AE_NULL_OBJECT;
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out_obj = output.pointer;
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if (out_obj->type != ACPI_TYPE_BUFFER
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|| out_obj->buffer.length != context->cap.length) {
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acpi_print_osc_error(handle, context,
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"_OSC evaluation returned wrong type");
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status = AE_TYPE;
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goto out_kfree;
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}
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/* Need to ignore the bit0 in result code */
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errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
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if (errors) {
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if (errors & OSC_REQUEST_ERROR)
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acpi_print_osc_error(handle, context,
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"_OSC request failed");
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if (errors & OSC_INVALID_UUID_ERROR)
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acpi_print_osc_error(handle, context,
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"_OSC invalid UUID");
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if (errors & OSC_INVALID_REVISION_ERROR)
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acpi_print_osc_error(handle, context,
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"_OSC invalid revision");
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if (errors & OSC_CAPABILITIES_MASK_ERROR) {
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if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
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& OSC_QUERY_ENABLE)
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goto out_success;
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status = AE_SUPPORT;
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goto out_kfree;
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}
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status = AE_ERROR;
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goto out_kfree;
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}
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out_success:
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context->ret.length = out_obj->buffer.length;
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context->ret.pointer = kmemdup(out_obj->buffer.pointer,
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context->ret.length, GFP_KERNEL);
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if (!context->ret.pointer) {
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status = AE_NO_MEMORY;
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goto out_kfree;
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}
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status = AE_OK;
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out_kfree:
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kfree(output.pointer);
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if (status != AE_OK)
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context->ret.pointer = NULL;
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return status;
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}
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EXPORT_SYMBOL(acpi_run_osc);
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bool osc_sb_apei_support_acked;
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static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
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static void acpi_bus_osc_support(void)
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{
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u32 capbuf[2];
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struct acpi_osc_context context = {
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.uuid_str = sb_uuid_str,
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.rev = 1,
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.cap.length = 8,
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.cap.pointer = capbuf,
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};
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acpi_handle handle;
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capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
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capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
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#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
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defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
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#endif
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#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
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#endif
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
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if (!ghes_disable)
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
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if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
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return;
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if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
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u32 *capbuf_ret = context.ret.pointer;
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if (context.ret.length > OSC_SUPPORT_DWORD)
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osc_sb_apei_support_acked =
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capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
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kfree(context.ret.pointer);
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}
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/* do we need to check other returned cap? Sounds no */
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}
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/* --------------------------------------------------------------------------
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Notification Handling
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-------------------------------------------------------------------------- */
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/**
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* acpi_bus_notify
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* ---------------
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* Callback for all 'system-level' device notifications (values 0x00-0x7F).
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*/
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static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
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{
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struct acpi_device *adev;
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struct acpi_driver *driver;
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u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
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bool hotplug_event = false;
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switch (type) {
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case ACPI_NOTIFY_BUS_CHECK:
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acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
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hotplug_event = true;
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break;
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case ACPI_NOTIFY_DEVICE_CHECK:
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
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hotplug_event = true;
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break;
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case ACPI_NOTIFY_DEVICE_WAKE:
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
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break;
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case ACPI_NOTIFY_EJECT_REQUEST:
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acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
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hotplug_event = true;
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break;
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case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
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/* TBD: Exactly what does 'light' mean? */
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break;
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case ACPI_NOTIFY_FREQUENCY_MISMATCH:
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acpi_handle_err(handle, "Device cannot be configured due "
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"to a frequency mismatch\n");
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break;
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case ACPI_NOTIFY_BUS_MODE_MISMATCH:
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acpi_handle_err(handle, "Device cannot be configured due "
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"to a bus mode mismatch\n");
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break;
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case ACPI_NOTIFY_POWER_FAULT:
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acpi_handle_err(handle, "Device has suffered a power fault\n");
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break;
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default:
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acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
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break;
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}
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adev = acpi_bus_get_acpi_device(handle);
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if (!adev)
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goto err;
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driver = adev->driver;
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if (driver && driver->ops.notify &&
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(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
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driver->ops.notify(adev, type);
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if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
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return;
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acpi_bus_put_acpi_device(adev);
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return;
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err:
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acpi_evaluate_ost(handle, type, ost_code, NULL);
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}
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static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
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{
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struct acpi_device *device = data;
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device->driver->ops.notify(device, event);
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}
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static void acpi_device_notify_fixed(void *data)
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{
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struct acpi_device *device = data;
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|
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/* Fixed hardware devices have no handles */
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acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
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}
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|
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static u32 acpi_device_fixed_event(void *data)
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{
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acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
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return ACPI_INTERRUPT_HANDLED;
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}
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|
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static int acpi_device_install_notify_handler(struct acpi_device *device)
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{
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acpi_status status;
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if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_device_fixed_event,
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device);
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else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_device_fixed_event,
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device);
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else
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status = acpi_install_notify_handler(device->handle,
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ACPI_DEVICE_NOTIFY,
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acpi_device_notify,
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device);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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return 0;
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}
|
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|
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static void acpi_device_remove_notify_handler(struct acpi_device *device)
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{
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if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
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acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_device_fixed_event);
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else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
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acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_device_fixed_event);
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else
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acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
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acpi_device_notify);
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}
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|
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/* --------------------------------------------------------------------------
|
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Device Matching
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev,
|
|
const struct device *dev)
|
|
{
|
|
struct mutex *physical_node_lock = &adev->physical_node_lock;
|
|
|
|
mutex_lock(physical_node_lock);
|
|
if (list_empty(&adev->physical_node_list)) {
|
|
adev = NULL;
|
|
} else {
|
|
const struct acpi_device_physical_node *node;
|
|
|
|
node = list_first_entry(&adev->physical_node_list,
|
|
struct acpi_device_physical_node, node);
|
|
if (node->dev != dev)
|
|
adev = NULL;
|
|
}
|
|
mutex_unlock(physical_node_lock);
|
|
return adev;
|
|
}
|
|
|
|
/**
|
|
* acpi_device_is_first_physical_node - Is given dev first physical node
|
|
* @adev: ACPI companion device
|
|
* @dev: Physical device to check
|
|
*
|
|
* Function checks if given @dev is the first physical devices attached to
|
|
* the ACPI companion device. This distinction is needed in some cases
|
|
* where the same companion device is shared between many physical devices.
|
|
*
|
|
* Note that the caller have to provide valid @adev pointer.
|
|
*/
|
|
bool acpi_device_is_first_physical_node(struct acpi_device *adev,
|
|
const struct device *dev)
|
|
{
|
|
return !!acpi_primary_dev_companion(adev, dev);
|
|
}
|
|
|
|
/*
|
|
* acpi_companion_match() - Can we match via ACPI companion device
|
|
* @dev: Device in question
|
|
*
|
|
* Check if the given device has an ACPI companion and if that companion has
|
|
* a valid list of PNP IDs, and if the device is the first (primary) physical
|
|
* device associated with it. Return the companion pointer if that's the case
|
|
* or NULL otherwise.
|
|
*
|
|
* If multiple physical devices are attached to a single ACPI companion, we need
|
|
* to be careful. The usage scenario for this kind of relationship is that all
|
|
* of the physical devices in question use resources provided by the ACPI
|
|
* companion. A typical case is an MFD device where all the sub-devices share
|
|
* the parent's ACPI companion. In such cases we can only allow the primary
|
|
* (first) physical device to be matched with the help of the companion's PNP
|
|
* IDs.
|
|
*
|
|
* Additional physical devices sharing the ACPI companion can still use
|
|
* resources available from it but they will be matched normally using functions
|
|
* provided by their bus types (and analogously for their modalias).
|
|
*/
|
|
struct acpi_device *acpi_companion_match(const struct device *dev)
|
|
{
|
|
struct acpi_device *adev;
|
|
|
|
adev = ACPI_COMPANION(dev);
|
|
if (!adev)
|
|
return NULL;
|
|
|
|
if (list_empty(&adev->pnp.ids))
|
|
return NULL;
|
|
|
|
return acpi_primary_dev_companion(adev, dev);
|
|
}
|
|
|
|
/**
|
|
* acpi_of_match_device - Match device object using the "compatible" property.
|
|
* @adev: ACPI device object to match.
|
|
* @of_match_table: List of device IDs to match against.
|
|
*
|
|
* If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
|
|
* identifiers and a _DSD object with the "compatible" property, use that
|
|
* property to match against the given list of identifiers.
|
|
*/
|
|
static bool acpi_of_match_device(struct acpi_device *adev,
|
|
const struct of_device_id *of_match_table)
|
|
{
|
|
const union acpi_object *of_compatible, *obj;
|
|
int i, nval;
|
|
|
|
if (!adev)
|
|
return false;
|
|
|
|
of_compatible = adev->data.of_compatible;
|
|
if (!of_match_table || !of_compatible)
|
|
return false;
|
|
|
|
if (of_compatible->type == ACPI_TYPE_PACKAGE) {
|
|
nval = of_compatible->package.count;
|
|
obj = of_compatible->package.elements;
|
|
} else { /* Must be ACPI_TYPE_STRING. */
|
|
nval = 1;
|
|
obj = of_compatible;
|
|
}
|
|
/* Now we can look for the driver DT compatible strings */
|
|
for (i = 0; i < nval; i++, obj++) {
|
|
const struct of_device_id *id;
|
|
|
|
for (id = of_match_table; id->compatible[0]; id++)
|
|
if (!strcasecmp(obj->string.pointer, id->compatible))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool __acpi_match_device_cls(const struct acpi_device_id *id,
|
|
struct acpi_hardware_id *hwid)
|
|
{
|
|
int i, msk, byte_shift;
|
|
char buf[3];
|
|
|
|
if (!id->cls)
|
|
return false;
|
|
|
|
/* Apply class-code bitmask, before checking each class-code byte */
|
|
for (i = 1; i <= 3; i++) {
|
|
byte_shift = 8 * (3 - i);
|
|
msk = (id->cls_msk >> byte_shift) & 0xFF;
|
|
if (!msk)
|
|
continue;
|
|
|
|
sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
|
|
if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const struct acpi_device_id *__acpi_match_device(
|
|
struct acpi_device *device,
|
|
const struct acpi_device_id *ids,
|
|
const struct of_device_id *of_ids)
|
|
{
|
|
const struct acpi_device_id *id;
|
|
struct acpi_hardware_id *hwid;
|
|
|
|
/*
|
|
* If the device is not present, it is unnecessary to load device
|
|
* driver for it.
|
|
*/
|
|
if (!device || !device->status.present)
|
|
return NULL;
|
|
|
|
list_for_each_entry(hwid, &device->pnp.ids, list) {
|
|
/* First, check the ACPI/PNP IDs provided by the caller. */
|
|
for (id = ids; id->id[0] || id->cls; id++) {
|
|
if (id->id[0] && !strcmp((char *) id->id, hwid->id))
|
|
return id;
|
|
else if (id->cls && __acpi_match_device_cls(id, hwid))
|
|
return id;
|
|
}
|
|
|
|
/*
|
|
* Next, check ACPI_DT_NAMESPACE_HID and try to match the
|
|
* "compatible" property if found.
|
|
*
|
|
* The id returned by the below is not valid, but the only
|
|
* caller passing non-NULL of_ids here is only interested in
|
|
* whether or not the return value is NULL.
|
|
*/
|
|
if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
|
|
&& acpi_of_match_device(device, of_ids))
|
|
return id;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* acpi_match_device - Match a struct device against a given list of ACPI IDs
|
|
* @ids: Array of struct acpi_device_id object to match against.
|
|
* @dev: The device structure to match.
|
|
*
|
|
* Check if @dev has a valid ACPI handle and if there is a struct acpi_device
|
|
* object for that handle and use that object to match against a given list of
|
|
* device IDs.
|
|
*
|
|
* Return a pointer to the first matching ID on success or %NULL on failure.
|
|
*/
|
|
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
|
|
const struct device *dev)
|
|
{
|
|
return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_match_device);
|
|
|
|
int acpi_match_device_ids(struct acpi_device *device,
|
|
const struct acpi_device_id *ids)
|
|
{
|
|
return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
|
|
}
|
|
EXPORT_SYMBOL(acpi_match_device_ids);
|
|
|
|
bool acpi_driver_match_device(struct device *dev,
|
|
const struct device_driver *drv)
|
|
{
|
|
if (!drv->acpi_match_table)
|
|
return acpi_of_match_device(ACPI_COMPANION(dev),
|
|
drv->of_match_table);
|
|
|
|
return !!__acpi_match_device(acpi_companion_match(dev),
|
|
drv->acpi_match_table, drv->of_match_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_driver_match_device);
|
|
|
|
/* --------------------------------------------------------------------------
|
|
ACPI Driver Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* acpi_bus_register_driver - register a driver with the ACPI bus
|
|
* @driver: driver being registered
|
|
*
|
|
* Registers a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and binds. Returns zero for
|
|
* success or a negative error status for failure.
|
|
*/
|
|
int acpi_bus_register_driver(struct acpi_driver *driver)
|
|
{
|
|
int ret;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
driver->drv.name = driver->name;
|
|
driver->drv.bus = &acpi_bus_type;
|
|
driver->drv.owner = driver->owner;
|
|
|
|
ret = driver_register(&driver->drv);
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_bus_register_driver);
|
|
|
|
/**
|
|
* acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
|
|
* @driver: driver to unregister
|
|
*
|
|
* Unregisters a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and unbinds.
|
|
*/
|
|
void acpi_bus_unregister_driver(struct acpi_driver *driver)
|
|
{
|
|
driver_unregister(&driver->drv);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_bus_unregister_driver);
|
|
|
|
/* --------------------------------------------------------------------------
|
|
ACPI Bus operations
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = to_acpi_driver(drv);
|
|
|
|
return acpi_dev->flags.match_driver
|
|
&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
|
|
}
|
|
|
|
static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
|
|
}
|
|
|
|
static int acpi_device_probe(struct device *dev)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
|
|
int ret;
|
|
|
|
if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
|
|
return -EINVAL;
|
|
|
|
if (!acpi_drv->ops.add)
|
|
return -ENOSYS;
|
|
|
|
ret = acpi_drv->ops.add(acpi_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
acpi_dev->driver = acpi_drv;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Driver [%s] successfully bound to device [%s]\n",
|
|
acpi_drv->name, acpi_dev->pnp.bus_id));
|
|
|
|
if (acpi_drv->ops.notify) {
|
|
ret = acpi_device_install_notify_handler(acpi_dev);
|
|
if (ret) {
|
|
if (acpi_drv->ops.remove)
|
|
acpi_drv->ops.remove(acpi_dev);
|
|
|
|
acpi_dev->driver = NULL;
|
|
acpi_dev->driver_data = NULL;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
|
|
acpi_drv->name, acpi_dev->pnp.bus_id));
|
|
get_device(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_device_remove(struct device * dev)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = acpi_dev->driver;
|
|
|
|
if (acpi_drv) {
|
|
if (acpi_drv->ops.notify)
|
|
acpi_device_remove_notify_handler(acpi_dev);
|
|
if (acpi_drv->ops.remove)
|
|
acpi_drv->ops.remove(acpi_dev);
|
|
}
|
|
acpi_dev->driver = NULL;
|
|
acpi_dev->driver_data = NULL;
|
|
|
|
put_device(dev);
|
|
return 0;
|
|
}
|
|
|
|
struct bus_type acpi_bus_type = {
|
|
.name = "acpi",
|
|
.match = acpi_bus_match,
|
|
.probe = acpi_device_probe,
|
|
.remove = acpi_device_remove,
|
|
.uevent = acpi_device_uevent,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Initialization/Cleanup
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int __init acpi_bus_init_irq(void)
|
|
{
|
|
acpi_status status;
|
|
char *message = NULL;
|
|
|
|
|
|
/*
|
|
* Let the system know what interrupt model we are using by
|
|
* evaluating the \_PIC object, if exists.
|
|
*/
|
|
|
|
switch (acpi_irq_model) {
|
|
case ACPI_IRQ_MODEL_PIC:
|
|
message = "PIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_IOAPIC:
|
|
message = "IOAPIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_IOSAPIC:
|
|
message = "IOSAPIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_GIC:
|
|
message = "GIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_PLATFORM:
|
|
message = "platform specific model";
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
|
|
|
|
status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
|
|
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_early_init - Initialize ACPICA and populate the ACPI namespace.
|
|
*
|
|
* The ACPI tables are accessible after this, but the handling of events has not
|
|
* been initialized and the global lock is not available yet, so AML should not
|
|
* be executed at this point.
|
|
*
|
|
* Doing this before switching the EFI runtime services to virtual mode allows
|
|
* the EfiBootServices memory to be freed slightly earlier on boot.
|
|
*/
|
|
void __init acpi_early_init(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
|
|
|
|
/* It's safe to verify table checksums during late stage */
|
|
acpi_gbl_verify_table_checksum = TRUE;
|
|
|
|
/* enable workarounds, unless strict ACPI spec. compliance */
|
|
if (!acpi_strict)
|
|
acpi_gbl_enable_interpreter_slack = TRUE;
|
|
|
|
acpi_gbl_permanent_mmap = 1;
|
|
|
|
/*
|
|
* If the machine falls into the DMI check table,
|
|
* DSDT will be copied to memory
|
|
*/
|
|
dmi_check_system(dsdt_dmi_table);
|
|
|
|
status = acpi_reallocate_root_table();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to reallocate ACPI tables\n");
|
|
goto error0;
|
|
}
|
|
|
|
status = acpi_initialize_subsystem();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to initialize the ACPI Interpreter\n");
|
|
goto error0;
|
|
}
|
|
|
|
status = acpi_load_tables();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to load the System Description Tables\n");
|
|
goto error0;
|
|
}
|
|
|
|
#ifdef CONFIG_X86
|
|
if (!acpi_ioapic) {
|
|
/* compatible (0) means level (3) */
|
|
if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
|
|
acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
|
|
acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
|
|
}
|
|
/* Set PIC-mode SCI trigger type */
|
|
acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
|
|
(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
|
|
} else {
|
|
/*
|
|
* now that acpi_gbl_FADT is initialized,
|
|
* update it with result from INT_SRC_OVR parsing
|
|
*/
|
|
acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
|
|
}
|
|
#endif
|
|
return;
|
|
|
|
error0:
|
|
disable_acpi();
|
|
}
|
|
|
|
/**
|
|
* acpi_subsystem_init - Finalize the early initialization of ACPI.
|
|
*
|
|
* Switch over the platform to the ACPI mode (if possible), initialize the
|
|
* handling of ACPI events, install the interrupt and global lock handlers.
|
|
*
|
|
* Doing this too early is generally unsafe, but at the same time it needs to be
|
|
* done before all things that really depend on ACPI. The right spot appears to
|
|
* be before finalizing the EFI initialization.
|
|
*/
|
|
void __init acpi_subsystem_init(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
|
|
disable_acpi();
|
|
} else {
|
|
/*
|
|
* If the system is using ACPI then we can be reasonably
|
|
* confident that any regulators are managed by the firmware
|
|
* so tell the regulator core it has everything it needs to
|
|
* know.
|
|
*/
|
|
regulator_has_full_constraints();
|
|
}
|
|
}
|
|
|
|
static int __init acpi_bus_init(void)
|
|
{
|
|
int result;
|
|
acpi_status status;
|
|
|
|
acpi_os_initialize1();
|
|
|
|
status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to start the ACPI Interpreter\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* ACPI 2.0 requires the EC driver to be loaded and work before
|
|
* the EC device is found in the namespace (i.e. before acpi_initialize_objects()
|
|
* is called).
|
|
*
|
|
* This is accomplished by looking for the ECDT table, and getting
|
|
* the EC parameters out of that.
|
|
*/
|
|
status = acpi_ec_ecdt_probe();
|
|
/* Ignore result. Not having an ECDT is not fatal. */
|
|
|
|
status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* _OSC method may exist in module level code,
|
|
* so it must be run after ACPI_FULL_INITIALIZATION
|
|
*/
|
|
acpi_bus_osc_support();
|
|
|
|
/*
|
|
* _PDC control method may load dynamic SSDT tables,
|
|
* and we need to install the table handler before that.
|
|
*/
|
|
acpi_sysfs_init();
|
|
|
|
acpi_early_processor_set_pdc();
|
|
|
|
/*
|
|
* Maybe EC region is required at bus_scan/acpi_get_devices. So it
|
|
* is necessary to enable it as early as possible.
|
|
*/
|
|
acpi_boot_ec_enable();
|
|
|
|
printk(KERN_INFO PREFIX "Interpreter enabled\n");
|
|
|
|
/* Initialize sleep structures */
|
|
acpi_sleep_init();
|
|
|
|
/*
|
|
* Get the system interrupt model and evaluate \_PIC.
|
|
*/
|
|
result = acpi_bus_init_irq();
|
|
if (result)
|
|
goto error1;
|
|
|
|
/*
|
|
* Register the for all standard device notifications.
|
|
*/
|
|
status =
|
|
acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
|
|
&acpi_bus_notify, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to register for device notifications\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* Create the top ACPI proc directory
|
|
*/
|
|
acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
|
|
|
|
result = bus_register(&acpi_bus_type);
|
|
if (!result)
|
|
return 0;
|
|
|
|
/* Mimic structured exception handling */
|
|
error1:
|
|
acpi_terminate();
|
|
return -ENODEV;
|
|
}
|
|
|
|
struct kobject *acpi_kobj;
|
|
EXPORT_SYMBOL_GPL(acpi_kobj);
|
|
|
|
static int __init acpi_init(void)
|
|
{
|
|
int result;
|
|
|
|
if (acpi_disabled) {
|
|
printk(KERN_INFO PREFIX "Interpreter disabled.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
|
|
if (!acpi_kobj) {
|
|
printk(KERN_WARNING "%s: kset create error\n", __func__);
|
|
acpi_kobj = NULL;
|
|
}
|
|
|
|
init_acpi_device_notify();
|
|
result = acpi_bus_init();
|
|
if (result) {
|
|
disable_acpi();
|
|
return result;
|
|
}
|
|
|
|
pci_mmcfg_late_init();
|
|
acpi_scan_init();
|
|
acpi_ec_init();
|
|
acpi_debugfs_init();
|
|
acpi_sleep_proc_init();
|
|
acpi_wakeup_device_init();
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(acpi_init);
|