![Bjorn Helgaas](/assets/img/avatar_default.png)
When CONFIG_ACPI_DEBUG=y, the default acpi_dbg_layer and acpi_dbg_level values built into the ACPI CA have some debug output enabled. We'd rather be quiet unless the user actually specified the acpi.debug_level argument. This enables distros to ship with CONFIG_ACPI_DEBUG=y without inundating users with debug output. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
887 lines
22 KiB
C
887 lines
22 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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#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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#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_power_nocheck(const struct dmi_system_id *id)
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{
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printk(KERN_NOTICE PREFIX "%s detected - "
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"disable power check in power transistion\n", id->ident);
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acpi_power_nocheck = 1;
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return 0;
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}
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static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
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{
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set_power_nocheck, "HP Pavilion 05", {
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DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
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DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL},
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{},
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};
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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 = AE_OK;
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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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int acpi_bus_get_status(struct acpi_device *device)
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{
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acpi_status status = AE_OK;
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unsigned long long sta = 0;
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if (!device)
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return -EINVAL;
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/*
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* Evaluate _STA if present.
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*/
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if (device->flags.dynamic_status) {
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status =
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acpi_evaluate_integer(device->handle, "_STA", NULL, &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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}
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/*
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* According to ACPI spec some device can be present and functional
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* even if the parent is not present but functional.
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* In such conditions the child device should not inherit the status
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* from the parent.
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*/
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else
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STRUCT_TO_INT(device->status) =
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ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
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ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
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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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u32 function, 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 = AE_OK;
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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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/* --------------------------------------------------------------------------
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Power Management
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-------------------------------------------------------------------------- */
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int acpi_bus_get_power(acpi_handle handle, int *state)
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{
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int result = 0;
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acpi_status status = 0;
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struct acpi_device *device = NULL;
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unsigned long long psc = 0;
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result = acpi_bus_get_device(handle, &device);
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if (result)
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return result;
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*state = ACPI_STATE_UNKNOWN;
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if (!device->flags.power_manageable) {
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/* TBD: Non-recursive algorithm for walking up hierarchy */
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if (device->parent)
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*state = device->parent->power.state;
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else
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*state = ACPI_STATE_D0;
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} else {
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/*
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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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*/
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if (device->power.flags.explicit_get) {
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status = acpi_evaluate_integer(device->handle, "_PSC",
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NULL, &psc);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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device->power.state = (int)psc;
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} else if (device->power.flags.power_resources) {
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result = acpi_power_get_inferred_state(device);
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if (result)
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return result;
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}
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*state = device->power.state;
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}
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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, device->power.state));
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return 0;
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}
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EXPORT_SYMBOL(acpi_bus_get_power);
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int acpi_bus_set_power(acpi_handle handle, int state)
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{
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int result = 0;
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acpi_status status = AE_OK;
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struct acpi_device *device = NULL;
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char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
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result = acpi_bus_get_device(handle, &device);
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if (result)
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return result;
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if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
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return -EINVAL;
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/* Make sure this is a valid target state */
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if (!device->flags.power_manageable) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n",
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kobject_name(&device->dev.kobj)));
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return -ENODEV;
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}
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/*
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* Get device's current power state
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*/
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if (!acpi_power_nocheck) {
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/*
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* Maybe the incorrect power state is returned on the bogus
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* bios, which is different with the real power state.
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* For example: the bios returns D0 state and the real power
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* state is D3. OS expects to set the device to D0 state. In
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* such case if OS uses the power state returned by the BIOS,
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* the device can't be transisted to the correct power state.
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* So if the acpi_power_nocheck is set, it is unnecessary to
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* get the power state by calling acpi_bus_get_power.
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*/
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acpi_bus_get_power(device->handle, &device->power.state);
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}
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if ((state == device->power.state) && !device->flags.force_power_state) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
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state));
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return 0;
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}
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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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return -ENODEV;
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}
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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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return -ENODEV;
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}
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/*
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* Transition Power
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* ----------------
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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.
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*/
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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 (result)
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goto end;
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}
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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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result = -ENODEV;
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goto end;
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}
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}
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} else {
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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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result = -ENODEV;
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goto end;
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}
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}
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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 (result)
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goto end;
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}
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}
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end:
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if (result)
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printk(KERN_WARNING PREFIX
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"Transitioning device [%s] to D%d\n",
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device->pnp.bus_id, state);
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else {
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device->power.state = state;
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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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}
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return result;
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}
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EXPORT_SYMBOL(acpi_bus_set_power);
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bool acpi_bus_power_manageable(acpi_handle handle)
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{
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struct acpi_device *device;
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int result;
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result = acpi_bus_get_device(handle, &device);
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return result ? false : device->flags.power_manageable;
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}
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EXPORT_SYMBOL(acpi_bus_power_manageable);
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bool acpi_bus_can_wakeup(acpi_handle handle)
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{
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struct acpi_device *device;
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int result;
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result = acpi_bus_get_device(handle, &device);
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return result ? false : device->wakeup.flags.valid;
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}
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EXPORT_SYMBOL(acpi_bus_can_wakeup);
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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 = 0;
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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 = kmalloc(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 = 0;
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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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Notification Handling
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-------------------------------------------------------------------------- */
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static int
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acpi_bus_check_device(struct acpi_device *device, int *status_changed)
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{
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acpi_status status = 0;
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struct acpi_device_status old_status;
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if (!device)
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return -EINVAL;
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if (status_changed)
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*status_changed = 0;
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old_status = device->status;
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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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if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) {
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if (status_changed)
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*status_changed = 1;
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}
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return 0;
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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 -ENODEV;
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if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
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return 0;
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if (status_changed)
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*status_changed = 1;
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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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return 0;
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}
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static int acpi_bus_check_scope(struct acpi_device *device)
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{
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int result = 0;
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int status_changed = 0;
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if (!device)
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return -EINVAL;
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/* Status Change? */
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result = acpi_bus_check_device(device, &status_changed);
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if (result)
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return result;
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if (!status_changed)
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return 0;
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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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return 0;
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}
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static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
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int register_acpi_bus_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
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}
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EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
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void unregister_acpi_bus_notifier(struct notifier_block *nb)
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{
|
|
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)
|
|
{
|
|
int result = 0;
|
|
struct acpi_device *device = NULL;
|
|
|
|
blocking_notifier_call_chain(&acpi_bus_notify_list,
|
|
type, (void *)handle);
|
|
|
|
if (acpi_bus_get_device(handle, &device))
|
|
return;
|
|
|
|
switch (type) {
|
|
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received BUS CHECK notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
result = acpi_bus_check_scope(device);
|
|
/*
|
|
* 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_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received DEVICE CHECK notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
result = acpi_bus_check_device(device, NULL);
|
|
/*
|
|
* TBD: We'll need to outsource certain events to non-ACPI
|
|
* drivers via the device manager (device.c).
|
|
*/
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_WAKE:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received DEVICE WAKE notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_EJECT_REQUEST:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received EJECT REQUEST notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received DEVICE CHECK LIGHT notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD: Exactly what does 'light' mean? */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received FREQUENCY MISMATCH notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received BUS MODE MISMATCH notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_POWER_FAULT:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received POWER FAULT notification for device [%s]\n",
|
|
device->pnp.bus_id));
|
|
/* TBD */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received unknown/unsupported notification [%08x]\n",
|
|
type));
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Initialization/Cleanup
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int __init acpi_bus_init_irq(void)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
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 = AE_OK;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
/*
|
|
* ACPI CA initializes acpi_dbg_level to non-zero, which means
|
|
* we get debug output merely by turning on CONFIG_ACPI_DEBUG.
|
|
* Turn it off so we don't get output unless the user specifies
|
|
* acpi.debug_level.
|
|
*/
|
|
acpi_dbg_level = 0;
|
|
|
|
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;
|
|
|
|
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_HARDWARE_INIT |
|
|
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 = 0;
|
|
acpi_status status = AE_OK;
|
|
extern acpi_status acpi_os_initialize1(void);
|
|
|
|
|
|
status = acpi_os_initialize1();
|
|
|
|
status =
|
|
acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to start the ACPI Interpreter\n");
|
|
goto error1;
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to initialize ACPI OS objects\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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
static int __init acpi_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
result = acpi_bus_init();
|
|
|
|
if (!result) {
|
|
pci_mmcfg_late_init();
|
|
if (!(pm_flags & PM_APM))
|
|
pm_flags |= PM_ACPI;
|
|
else {
|
|
printk(KERN_INFO PREFIX
|
|
"APM is already active, exiting\n");
|
|
disable_acpi();
|
|
result = -ENODEV;
|
|
}
|
|
} else
|
|
disable_acpi();
|
|
/*
|
|
* If the laptop falls into the DMI check table, the power state check
|
|
* will be disabled in the course of device power transistion.
|
|
*/
|
|
dmi_check_system(power_nocheck_dmi_table);
|
|
return result;
|
|
}
|
|
|
|
subsys_initcall(acpi_init);
|