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* acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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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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* 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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* 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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#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/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 <asm/mpspec.h>
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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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#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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static int set_copy_dsdt(const struct dmi_system_id *id)
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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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static struct dmi_system_id dsdt_dmi_table[] __initdata = {
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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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.callback = set_copy_dsdt,
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.ident = "TOSHIBA Satellite",
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
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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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int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
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acpi_status status = AE_OK;
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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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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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status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
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if (ACPI_SUCCESS(status))
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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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int acpi_bus_get_status(struct acpi_device *device)
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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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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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(u32) STRUCT_TO_INT(device->status)));
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
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(u32) STRUCT_TO_INT(device->status)));
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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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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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acpi_status status = AE_OK;
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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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EXPORT_SYMBOL(acpi_bus_get_private_data);
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/* --------------------------------------------------------------------------
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-------------------------------------------------------------------------- */
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static int __acpi_bus_get_power(struct acpi_device *device, int *state)
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acpi_status status = 0;
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unsigned long long psc = 0;
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if (!device || !state)
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*state = ACPI_STATE_UNKNOWN;
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if (device->flags.power_manageable) {
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* Get the device's power state either directly (via _PSC) or
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* indirectly (via power resources).
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if (device->power.flags.power_resources) {
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result = acpi_power_get_inferred_state(device, state);
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} else if (device->power.flags.explicit_get) {
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status = acpi_evaluate_integer(device->handle, "_PSC",
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if (ACPI_FAILURE(status))
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/* TBD: Non-recursive algorithm for walking up hierarchy. */
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*state = device->parent ?
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device->parent->power.state : ACPI_STATE_D0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
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device->pnp.bus_id, *state));
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static int __acpi_bus_set_power(struct acpi_device *device, int state)
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acpi_status status = AE_OK;
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char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
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if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
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/* Make sure this is a valid target state */
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if (state == device->power.state) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
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if (!device->power.states[state].flags.valid) {
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printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
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if (device->parent && (state < device->parent->power.state)) {
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printk(KERN_WARNING PREFIX
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"Cannot set device to a higher-powered"
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" state than parent\n");
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* On transitions to a high-powered state we first apply power (via
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* power resources) then evalute _PSx. Conversly for transitions to
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* a lower-powered state.
260
if (state < device->power.state) {
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if (device->power.flags.power_resources) {
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result = acpi_power_transition(device, state);
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if (device->power.states[state].flags.explicit_set) {
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status = acpi_evaluate_object(device->handle,
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object_name, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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if (device->power.states[state].flags.explicit_set) {
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status = acpi_evaluate_object(device->handle,
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object_name, NULL, NULL);
278
if (ACPI_FAILURE(status)) {
283
if (device->power.flags.power_resources) {
284
result = acpi_power_transition(device, state);
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printk(KERN_WARNING PREFIX
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"Device [%s] failed to transition to D%d\n",
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device->pnp.bus_id, state);
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device->power.state = state;
297
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device [%s] transitioned to D%d\n",
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device->pnp.bus_id, state));
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int acpi_bus_set_power(acpi_handle handle, int state)
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struct acpi_device *device;
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result = acpi_bus_get_device(handle, &device);
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if (!device->flags.power_manageable) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Device [%s] is not power manageable\n",
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dev_name(&device->dev)));
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return __acpi_bus_set_power(device, state);
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EXPORT_SYMBOL(acpi_bus_set_power);
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int acpi_bus_init_power(struct acpi_device *device)
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device->power.state = ACPI_STATE_UNKNOWN;
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result = __acpi_bus_get_power(device, &state);
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if (device->power.flags.power_resources)
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result = acpi_power_on_resources(device, state);
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device->power.state = state;
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int acpi_bus_update_power(acpi_handle handle, int *state_p)
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struct acpi_device *device;
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result = acpi_bus_get_device(handle, &device);
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result = __acpi_bus_get_power(device, &state);
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result = __acpi_bus_set_power(device, state);
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if (!result && state_p)
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EXPORT_SYMBOL_GPL(acpi_bus_update_power);
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bool acpi_bus_power_manageable(acpi_handle handle)
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struct acpi_device *device;
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result = acpi_bus_get_device(handle, &device);
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return result ? false : device->flags.power_manageable;
383
EXPORT_SYMBOL(acpi_bus_power_manageable);
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bool acpi_bus_can_wakeup(acpi_handle handle)
387
struct acpi_device *device;
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result = acpi_bus_get_device(handle, &device);
391
return result ? false : device->wakeup.flags.valid;
394
EXPORT_SYMBOL(acpi_bus_can_wakeup);
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static void acpi_print_osc_error(acpi_handle handle,
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struct acpi_osc_context *context, char *error)
399
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
402
if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
403
printk(KERN_DEBUG "%s\n", error);
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printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
406
kfree(buffer.pointer);
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printk(KERN_DEBUG"_OSC request data:");
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for (i = 0; i < context->cap.length; i += sizeof(u32))
410
printk("%x ", *((u32 *)(context->cap.pointer + i)));
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static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
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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;
422
for (i = 0; i < 36; i++) {
423
if (i == 8 || i == 13 || i == 18 || i == 23) {
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return AE_BAD_PARAMETER;
426
} else if (!isxdigit(str[i]))
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return AE_BAD_PARAMETER;
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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;
431
uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
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acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
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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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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
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if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
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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 */
455
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;
467
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
468
if (ACPI_FAILURE(status))
472
return AE_NULL_OBJECT;
474
out_obj = output.pointer;
475
if (out_obj->type != ACPI_TYPE_BUFFER
476
|| out_obj->buffer.length != context->cap.length) {
477
acpi_print_osc_error(handle, context,
478
"_OSC evaluation returned wrong type");
482
/* Need to ignore the bit0 in result code */
483
errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
485
if (errors & OSC_REQUEST_ERROR)
486
acpi_print_osc_error(handle, context,
487
"_OSC request failed");
488
if (errors & OSC_INVALID_UUID_ERROR)
489
acpi_print_osc_error(handle, context,
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"_OSC invalid UUID");
491
if (errors & OSC_INVALID_REVISION_ERROR)
492
acpi_print_osc_error(handle, context,
493
"_OSC invalid revision");
494
if (errors & OSC_CAPABILITIES_MASK_ERROR) {
495
if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
505
context->ret.length = out_obj->buffer.length;
506
context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
507
if (!context->ret.pointer) {
508
status = AE_NO_MEMORY;
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memcpy(context->ret.pointer, out_obj->buffer.pointer,
512
context->ret.length);
516
kfree(output.pointer);
518
context->ret.pointer = NULL;
521
EXPORT_SYMBOL(acpi_run_osc);
523
bool osc_sb_apei_support_acked;
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static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
525
static void acpi_bus_osc_support(void)
528
struct acpi_osc_context context = {
529
.uuid_str = sb_uuid_str,
532
.cap.pointer = capbuf,
536
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
537
capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
538
#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
539
defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
540
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
543
#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
544
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
548
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
549
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
551
if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
552
u32 *capbuf_ret = context.ret.pointer;
553
if (context.ret.length > OSC_SUPPORT_TYPE)
554
osc_sb_apei_support_acked =
555
capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
556
kfree(context.ret.pointer);
558
/* do we need to check other returned cap? Sounds no */
561
/* --------------------------------------------------------------------------
563
-------------------------------------------------------------------------- */
565
#ifdef CONFIG_ACPI_PROC_EVENT
566
static DEFINE_SPINLOCK(acpi_bus_event_lock);
568
LIST_HEAD(acpi_bus_event_list);
569
DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
571
extern int event_is_open;
573
int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
575
struct acpi_bus_event *event;
576
unsigned long flags = 0;
578
/* drop event on the floor if no one's listening */
582
event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
586
strcpy(event->device_class, device_class);
587
strcpy(event->bus_id, bus_id);
591
spin_lock_irqsave(&acpi_bus_event_lock, flags);
592
list_add_tail(&event->node, &acpi_bus_event_list);
593
spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
595
wake_up_interruptible(&acpi_bus_event_queue);
601
EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
603
int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
607
return acpi_bus_generate_proc_event4(device->pnp.device_class,
608
device->pnp.bus_id, type, data);
611
EXPORT_SYMBOL(acpi_bus_generate_proc_event);
613
int acpi_bus_receive_event(struct acpi_bus_event *event)
615
unsigned long flags = 0;
616
struct acpi_bus_event *entry = NULL;
618
DECLARE_WAITQUEUE(wait, current);
624
if (list_empty(&acpi_bus_event_list)) {
626
set_current_state(TASK_INTERRUPTIBLE);
627
add_wait_queue(&acpi_bus_event_queue, &wait);
629
if (list_empty(&acpi_bus_event_list))
632
remove_wait_queue(&acpi_bus_event_queue, &wait);
633
set_current_state(TASK_RUNNING);
635
if (signal_pending(current))
639
spin_lock_irqsave(&acpi_bus_event_lock, flags);
640
if (!list_empty(&acpi_bus_event_list)) {
641
entry = list_entry(acpi_bus_event_list.next,
642
struct acpi_bus_event, node);
643
list_del(&entry->node);
645
spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
650
memcpy(event, entry, sizeof(struct acpi_bus_event));
657
#endif /* CONFIG_ACPI_PROC_EVENT */
659
/* --------------------------------------------------------------------------
660
Notification Handling
661
-------------------------------------------------------------------------- */
663
static void acpi_bus_check_device(acpi_handle handle)
665
struct acpi_device *device;
667
struct acpi_device_status old_status;
669
if (acpi_bus_get_device(handle, &device))
674
old_status = device->status;
677
* Make sure this device's parent is present before we go about
678
* messing with the device.
680
if (device->parent && !device->parent->status.present) {
681
device->status = device->parent->status;
685
status = acpi_bus_get_status(device);
686
if (ACPI_FAILURE(status))
689
if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
693
* Device Insertion/Removal
695
if ((device->status.present) && !(old_status.present)) {
696
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
697
/* TBD: Handle device insertion */
698
} else if (!(device->status.present) && (old_status.present)) {
699
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
700
/* TBD: Handle device removal */
704
static void acpi_bus_check_scope(acpi_handle handle)
707
acpi_bus_check_device(handle);
710
* TBD: Enumerate child devices within this device's scope and
711
* run acpi_bus_check_device()'s on them.
715
static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
716
int register_acpi_bus_notifier(struct notifier_block *nb)
718
return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
720
EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
722
void unregister_acpi_bus_notifier(struct notifier_block *nb)
724
blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
726
EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
731
* Callback for all 'system-level' device notifications (values 0x00-0x7F).
733
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
735
struct acpi_device *device = NULL;
736
struct acpi_driver *driver;
738
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
741
blocking_notifier_call_chain(&acpi_bus_notify_list,
742
type, (void *)handle);
746
case ACPI_NOTIFY_BUS_CHECK:
747
acpi_bus_check_scope(handle);
749
* TBD: We'll need to outsource certain events to non-ACPI
750
* drivers via the device manager (device.c).
754
case ACPI_NOTIFY_DEVICE_CHECK:
755
acpi_bus_check_device(handle);
757
* TBD: We'll need to outsource certain events to non-ACPI
758
* drivers via the device manager (device.c).
762
case ACPI_NOTIFY_DEVICE_WAKE:
766
case ACPI_NOTIFY_EJECT_REQUEST:
770
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
771
/* TBD: Exactly what does 'light' mean? */
774
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
778
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
782
case ACPI_NOTIFY_POWER_FAULT:
787
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
788
"Received unknown/unsupported notification [%08x]\n",
793
acpi_bus_get_device(handle, &device);
795
driver = device->driver;
796
if (driver && driver->ops.notify &&
797
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
798
driver->ops.notify(device, type);
802
/* --------------------------------------------------------------------------
803
Initialization/Cleanup
804
-------------------------------------------------------------------------- */
806
static int __init acpi_bus_init_irq(void)
808
acpi_status status = AE_OK;
809
union acpi_object arg = { ACPI_TYPE_INTEGER };
810
struct acpi_object_list arg_list = { 1, &arg };
811
char *message = NULL;
815
* Let the system know what interrupt model we are using by
816
* evaluating the \_PIC object, if exists.
819
switch (acpi_irq_model) {
820
case ACPI_IRQ_MODEL_PIC:
823
case ACPI_IRQ_MODEL_IOAPIC:
826
case ACPI_IRQ_MODEL_IOSAPIC:
829
case ACPI_IRQ_MODEL_PLATFORM:
830
message = "platform specific model";
833
printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
837
printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
839
arg.integer.value = acpi_irq_model;
841
status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
842
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
843
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
850
u8 acpi_gbl_permanent_mmap;
853
void __init acpi_early_init(void)
855
acpi_status status = AE_OK;
860
printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
862
/* enable workarounds, unless strict ACPI spec. compliance */
864
acpi_gbl_enable_interpreter_slack = TRUE;
866
acpi_gbl_permanent_mmap = 1;
869
* If the machine falls into the DMI check table,
870
* DSDT will be copied to memory
872
dmi_check_system(dsdt_dmi_table);
874
status = acpi_reallocate_root_table();
875
if (ACPI_FAILURE(status)) {
876
printk(KERN_ERR PREFIX
877
"Unable to reallocate ACPI tables\n");
881
status = acpi_initialize_subsystem();
882
if (ACPI_FAILURE(status)) {
883
printk(KERN_ERR PREFIX
884
"Unable to initialize the ACPI Interpreter\n");
888
status = acpi_load_tables();
889
if (ACPI_FAILURE(status)) {
890
printk(KERN_ERR PREFIX
891
"Unable to load the System Description Tables\n");
897
/* compatible (0) means level (3) */
898
if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
899
acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
900
acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
902
/* Set PIC-mode SCI trigger type */
903
acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
904
(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
907
* now that acpi_gbl_FADT is initialized,
908
* update it with result from INT_SRC_OVR parsing
910
acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
914
status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
915
if (ACPI_FAILURE(status)) {
916
printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
927
static int __init acpi_bus_init(void)
930
acpi_status status = AE_OK;
931
extern acpi_status acpi_os_initialize1(void);
933
acpi_os_initialize1();
935
status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
936
if (ACPI_FAILURE(status)) {
937
printk(KERN_ERR PREFIX
938
"Unable to start the ACPI Interpreter\n");
943
* ACPI 2.0 requires the EC driver to be loaded and work before
944
* the EC device is found in the namespace (i.e. before acpi_initialize_objects()
947
* This is accomplished by looking for the ECDT table, and getting
948
* the EC parameters out of that.
950
status = acpi_ec_ecdt_probe();
951
/* Ignore result. Not having an ECDT is not fatal. */
953
acpi_bus_osc_support();
955
status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
956
if (ACPI_FAILURE(status)) {
957
printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
962
* _PDC control method may load dynamic SSDT tables,
963
* and we need to install the table handler before that.
967
acpi_early_processor_set_pdc();
970
* Maybe EC region is required at bus_scan/acpi_get_devices. So it
971
* is necessary to enable it as early as possible.
973
acpi_boot_ec_enable();
975
printk(KERN_INFO PREFIX "Interpreter enabled\n");
977
/* Initialize sleep structures */
981
* Get the system interrupt model and evaluate \_PIC.
983
result = acpi_bus_init_irq();
988
* Register the for all standard device notifications.
991
acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
992
&acpi_bus_notify, NULL);
993
if (ACPI_FAILURE(status)) {
994
printk(KERN_ERR PREFIX
995
"Unable to register for device notifications\n");
1000
* Create the top ACPI proc directory
1002
acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1006
/* Mimic structured exception handling */
1012
struct kobject *acpi_kobj;
1014
static int __init acpi_init(void)
1018
if (acpi_disabled) {
1019
printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1023
acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1025
printk(KERN_WARNING "%s: kset create error\n", __func__);
1029
init_acpi_device_notify();
1030
result = acpi_bus_init();
1036
pci_mmcfg_late_init();
1039
acpi_debugfs_init();
1040
acpi_sleep_proc_init();
1041
acpi_wakeup_device_init();
1045
subsys_initcall(acpi_init);