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![Bjorn Helgaas](/assets/img/avatar_default.png)
These local variables are all initialized at their first use, so there's no point in initializing them earlier. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
837 lines
20 KiB
C
837 lines
20 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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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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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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#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/acpi_bus.h>
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#include <acpi/acpi_drivers.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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#define STRUCT_TO_INT(s) (*((int*)&s))
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#ifdef CONFIG_X86
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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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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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int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
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{
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acpi_status status;
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if (!device)
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return -EINVAL;
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/* TBD: Support fixed-feature devices */
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status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
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if (ACPI_FAILURE(status) || !*device) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
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handle));
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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(acpi_bus_get_device);
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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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STRUCT_TO_INT(device->status) = (int) 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,
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(u32) STRUCT_TO_INT(device->status)));
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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,
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(u32) STRUCT_TO_INT(device->status)));
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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_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) || !*data) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
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handle));
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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(acpi_bus_get_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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static 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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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_TYPE]
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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_TYPE] = OSC_QUERY_ENABLE;
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capbuf[OSC_SUPPORT_TYPE] = 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_TYPE] |= 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_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
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#endif
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#ifdef ACPI_HOTPLUG_OST
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capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
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#endif
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if (!ghes_disable)
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capbuf[OSC_SUPPORT_TYPE] |= 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_TYPE)
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osc_sb_apei_support_acked =
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capbuf_ret[OSC_SUPPORT_TYPE] & 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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Event Management
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-------------------------------------------------------------------------- */
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#ifdef CONFIG_ACPI_PROC_EVENT
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static DEFINE_SPINLOCK(acpi_bus_event_lock);
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LIST_HEAD(acpi_bus_event_list);
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DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
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extern int event_is_open;
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int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
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{
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struct acpi_bus_event *event;
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unsigned long flags;
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/* drop event on the floor if no one's listening */
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if (!event_is_open)
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return 0;
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event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
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if (!event)
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return -ENOMEM;
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strcpy(event->device_class, device_class);
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strcpy(event->bus_id, bus_id);
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event->type = type;
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event->data = data;
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spin_lock_irqsave(&acpi_bus_event_lock, flags);
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list_add_tail(&event->node, &acpi_bus_event_list);
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spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
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wake_up_interruptible(&acpi_bus_event_queue);
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return 0;
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}
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EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
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int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
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{
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if (!device)
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return -EINVAL;
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return acpi_bus_generate_proc_event4(device->pnp.device_class,
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device->pnp.bus_id, type, data);
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}
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EXPORT_SYMBOL(acpi_bus_generate_proc_event);
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int acpi_bus_receive_event(struct acpi_bus_event *event)
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{
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unsigned long flags;
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struct acpi_bus_event *entry = NULL;
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DECLARE_WAITQUEUE(wait, current);
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if (!event)
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return -EINVAL;
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if (list_empty(&acpi_bus_event_list)) {
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set_current_state(TASK_INTERRUPTIBLE);
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add_wait_queue(&acpi_bus_event_queue, &wait);
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if (list_empty(&acpi_bus_event_list))
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schedule();
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remove_wait_queue(&acpi_bus_event_queue, &wait);
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set_current_state(TASK_RUNNING);
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if (signal_pending(current))
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return -ERESTARTSYS;
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}
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spin_lock_irqsave(&acpi_bus_event_lock, flags);
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if (!list_empty(&acpi_bus_event_list)) {
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entry = list_entry(acpi_bus_event_list.next,
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struct acpi_bus_event, node);
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list_del(&entry->node);
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}
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spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
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if (!entry)
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return -ENODEV;
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memcpy(event, entry, sizeof(struct acpi_bus_event));
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kfree(entry);
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return 0;
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}
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#endif /* CONFIG_ACPI_PROC_EVENT */
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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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static void acpi_bus_check_device(acpi_handle handle)
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{
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struct acpi_device *device;
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acpi_status status;
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struct acpi_device_status old_status;
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if (acpi_bus_get_device(handle, &device))
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return;
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if (!device)
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return;
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old_status = device->status;
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|
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/*
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* Make sure this device's parent is present before we go about
|
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* messing with the device.
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*/
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if (device->parent && !device->parent->status.present) {
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device->status = device->parent->status;
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return;
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}
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status = acpi_bus_get_status(device);
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if (ACPI_FAILURE(status))
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return;
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if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
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return;
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|
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/*
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* Device Insertion/Removal
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*/
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if ((device->status.present) && !(old_status.present)) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
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/* TBD: Handle device insertion */
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} else if (!(device->status.present) && (old_status.present)) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
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/* TBD: Handle device removal */
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}
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}
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|
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static void acpi_bus_check_scope(acpi_handle handle)
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{
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/* Status Change? */
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acpi_bus_check_device(handle);
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|
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/*
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* TBD: Enumerate child devices within this device's scope and
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* run acpi_bus_check_device()'s on them.
|
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*/
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}
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|
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static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
|
|
int register_acpi_bus_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
|
|
|
|
void unregister_acpi_bus_notifier(struct notifier_block *nb)
|
|
{
|
|
blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
|
|
|
|
/**
|
|
* acpi_bus_notify
|
|
* ---------------
|
|
* Callback for all 'system-level' device notifications (values 0x00-0x7F).
|
|
*/
|
|
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_driver *driver;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
|
|
type, handle));
|
|
|
|
blocking_notifier_call_chain(&acpi_bus_notify_list,
|
|
type, (void *)handle);
|
|
|
|
switch (type) {
|
|
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
acpi_bus_check_scope(handle);
|
|
/*
|
|
* TBD: We'll need to outsource certain events to non-ACPI
|
|
* drivers via the device manager (device.c).
|
|
*/
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
acpi_bus_check_device(handle);
|
|
/*
|
|
* TBD: We'll need to outsource certain events to non-ACPI
|
|
* drivers via the device manager (device.c).
|
|
*/
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_WAKE:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_EJECT_REQUEST:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
|
|
/* TBD: Exactly what does 'light' mean? */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_POWER_FAULT:
|
|
/* TBD */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received unknown/unsupported notification [%08x]\n",
|
|
type));
|
|
break;
|
|
}
|
|
|
|
acpi_bus_get_device(handle, &device);
|
|
if (device) {
|
|
driver = device->driver;
|
|
if (driver && driver->ops.notify &&
|
|
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
|
|
driver->ops.notify(device, type);
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Initialization/Cleanup
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int __init acpi_bus_init_irq(void)
|
|
{
|
|
acpi_status status;
|
|
union acpi_object arg = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list arg_list = { 1, &arg };
|
|
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_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);
|
|
|
|
arg.integer.value = acpi_irq_model;
|
|
|
|
status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
|
|
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 acpi_gbl_permanent_mmap;
|
|
|
|
|
|
void __init acpi_early_init(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
|
|
|
|
/* 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
|
|
|
|
status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
|
|
goto error0;
|
|
}
|
|
|
|
return;
|
|
|
|
error0:
|
|
disable_acpi();
|
|
return;
|
|
}
|
|
|
|
static int __init acpi_bus_init(void)
|
|
{
|
|
int result;
|
|
acpi_status status;
|
|
extern acpi_status acpi_os_initialize1(void);
|
|
|
|
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);
|
|
|
|
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);
|