mirror of
https://github.com/reactos/reactos.git
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1827 lines
44 KiB
C
1827 lines
44 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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/*
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* Modified for ReactOS and latest ACPICA
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* Copyright (C)2009 Samuel Serapion
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*/
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#include <precomp.h>
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#define NDEBUG
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#include <debug.h>
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#define _COMPONENT ACPI_BUS_COMPONENT
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ACPI_MODULE_NAME ("acpi_bus")
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#define WALK_UP 0
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#define WALK_DOWN 1
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#define STRUCT_TO_INT(s) (*((int*)&s))
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#define HAS_CHILDREN(d) ((d)->children.next != &((d)->children))
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#define HAS_SIBLINGS(d) (((d)->parent) && ((d)->node.next != &(d)->parent->children))
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#define NODE_TO_DEVICE(n) (list_entry(n, struct acpi_device, node))
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int event_is_open;
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extern void acpi_pic_sci_set_trigger(unsigned int irq, UINT16 trigger);
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typedef int (*acpi_bus_walk_callback)(struct acpi_device*, int, void*);
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struct acpi_device *acpi_root;
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KSPIN_LOCK 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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KEVENT AcpiEventQueue;
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KDPC event_dpc;
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int ProcessorCount, PowerDeviceCount, PowerButtonCount, FixedPowerButtonCount;
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int FixedSleepButtonCount, SleepButtonCount, ThermalZoneCount;
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static int
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acpi_device_register (
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struct acpi_device *device,
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struct acpi_device *parent)
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{
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int result = 0;
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if (!device)
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return_VALUE(AE_BAD_PARAMETER);
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return_VALUE(result);
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}
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static int
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acpi_device_unregister (
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struct acpi_device *device)
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{
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if (!device)
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return_VALUE(AE_BAD_PARAMETER);
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#ifdef CONFIG_LDM
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put_device(&device->dev);
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#endif /*CONFIG_LDM*/
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return_VALUE(0);
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}
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/* --------------------------------------------------------------------------
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Device Management
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-------------------------------------------------------------------------- */
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void
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acpi_bus_data_handler (
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ACPI_HANDLE handle,
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void *context)
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{
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DPRINT1("acpi_bus_data_handler not implemented\n");
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/* TBD */
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return;
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}
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int
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acpi_bus_get_device (
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ACPI_HANDLE handle,
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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_VALUE(AE_BAD_PARAMETER);
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/* TBD: Support fixed-feature devices */
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status = AcpiGetData(handle, acpi_bus_data_handler, (void**)device);
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if (ACPI_FAILURE(status) || !*device) {
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DPRINT( "Error getting context for object [%p]\n",
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handle);
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return_VALUE(AE_NOT_FOUND);
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}
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return 0;
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}
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ACPI_STATUS acpi_bus_get_status_handle(ACPI_HANDLE handle,
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unsigned long long *sta)
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{
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ACPI_STATUS status;
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status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
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if (ACPI_SUCCESS(status))
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return AE_OK;
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if (status == AE_NOT_FOUND) {
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*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
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ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
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return AE_OK;
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}
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return status;
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}
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int
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acpi_bus_get_status (
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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 -1;
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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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(UINT32) 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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(UINT32) STRUCT_TO_INT(device->status)));
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return 0;
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}
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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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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 -1;
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status = AcpiGetData(handle, acpi_bus_private_data_handler, data);
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if (ACPI_FAILURE(status) || !*data) {
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DPRINT("No context for object [%p]\n", handle);
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return -1;
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}
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return 0;
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}
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/* --------------------------------------------------------------------------
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Power Management
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-------------------------------------------------------------------------- */
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int
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acpi_bus_get_power (
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ACPI_HANDLE handle,
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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_VALUE(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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}
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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_VALUE(AE_NOT_FOUND);
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device->power.state = (int) psc;
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}
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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_VALUE(result);
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}
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*state = device->power.state;
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}
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DPRINT("Device [%s] power state is D%d\n",
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device->pnp.bus_id, device->power.state);
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return_VALUE(0);
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}
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int
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acpi_bus_set_power (
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ACPI_HANDLE handle,
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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_VALUE(result);
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if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
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return_VALUE(AE_BAD_PARAMETER);
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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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DPRINT1( "Device is not power manageable\n");
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return_VALUE(AE_NOT_FOUND);
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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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DPRINT1("Device is already at D%d\n", 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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DPRINT1( "Device does not support D%d\n", state);
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return AE_NOT_FOUND;
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}
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if (device->parent && (state < device->parent->power.state)) {
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DPRINT1( "Cannot set device to a higher-powered state than parent\n");
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return AE_NOT_FOUND;
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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. Conversely 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 = AcpiEvaluateObject(device->handle,
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object_name, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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result = AE_NOT_FOUND;
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goto end;
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}
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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 = AcpiEvaluateObject(device->handle,
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object_name, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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result = AE_NOT_FOUND;
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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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DPRINT( "Error 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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DPRINT("Device [%s] transitioned to D%d\n",
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device->pnp.bus_id, state);
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return result;
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}
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BOOLEAN 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 ? 0 : device->flags.power_manageable;
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}
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BOOLEAN 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 ? 0 : device->wakeup.flags.valid;
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}
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static int
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acpi_bus_get_power_flags (
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struct acpi_device *device)
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{
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ACPI_STATUS status = 0;
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ACPI_HANDLE handle = 0;
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UINT32 i = 0;
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if (!device)
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return AE_NOT_FOUND;
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/*
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* Power Management Flags
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*/
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status = AcpiGetHandle(device->handle, "_PSC", &handle);
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if (ACPI_SUCCESS(status))
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device->power.flags.explicit_get = 1;
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status = AcpiGetHandle(device->handle, "_IRC", &handle);
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if (ACPI_SUCCESS(status))
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device->power.flags.inrush_current = 1;
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status = AcpiGetHandle(device->handle, "_PRW", &handle);
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if (ACPI_SUCCESS(status))
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device->flags.wake_capable = 1;
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/*
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* Enumerate supported power management states
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*/
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for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
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struct acpi_device_power_state *ps = &device->power.states[i];
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char object_name[5] = {'_','P','R','0'+i,'\0'};
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/* Evaluate "_PRx" to se if power resources are referenced */
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status = acpi_evaluate_reference(device->handle, object_name, NULL,
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&ps->resources);
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if (ACPI_SUCCESS(status) && ps->resources.count) {
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device->power.flags.power_resources = 1;
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ps->flags.valid = 1;
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}
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/* Evaluate "_PSx" to see if we can do explicit sets */
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object_name[2] = 'S';
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status = AcpiGetHandle(device->handle, object_name, &handle);
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if (ACPI_SUCCESS(status)) {
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ps->flags.explicit_set = 1;
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ps->flags.valid = 1;
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}
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/* State is valid if we have some power control */
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if (ps->resources.count || ps->flags.explicit_set)
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ps->flags.valid = 1;
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ps->power = -1; /* Unknown - driver assigned */
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ps->latency = -1; /* Unknown - driver assigned */
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}
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/* Set defaults for D0 and D3 states (always valid) */
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device->power.states[ACPI_STATE_D0].flags.valid = 1;
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device->power.states[ACPI_STATE_D0].power = 100;
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device->power.states[ACPI_STATE_D3].flags.valid = 1;
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device->power.states[ACPI_STATE_D3].power = 0;
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device->power.state = ACPI_STATE_UNKNOWN;
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return 0;
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}
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/* --------------------------------------------------------------------------
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Performance Management
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-------------------------------------------------------------------------- */
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static int
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acpi_bus_get_perf_flags (
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struct acpi_device *device)
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{
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if (!device)
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return AE_NOT_FOUND;
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device->performance.state = ACPI_STATE_UNKNOWN;
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return 0;
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}
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/* --------------------------------------------------------------------------
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Event Management
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-------------------------------------------------------------------------- */
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void
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NTAPI
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acpi_bus_generate_event_dpc(PKDPC Dpc,
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PVOID DeferredContext,
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PVOID SystemArgument1,
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PVOID SystemArgument2)
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{
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struct acpi_bus_event *event;
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struct acpi_device *device = SystemArgument1;
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ULONG_PTR TypeData = (ULONG_PTR)SystemArgument2;
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KIRQL OldIrql;
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event = ExAllocatePoolWithTag(NonPagedPool,sizeof(struct acpi_bus_event), 'epcA');
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if (!event)
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return;
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sprintf(event->device_class, "%s", device->pnp.device_class);
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sprintf(event->bus_id, "%s", device->pnp.bus_id);
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event->type = (TypeData & 0xFF000000) >> 24;
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event->data = (TypeData & 0x00FFFFFF);
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KeAcquireSpinLock(&acpi_bus_event_lock, &OldIrql);
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list_add_tail(&event->node, &acpi_bus_event_list);
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KeReleaseSpinLock(&acpi_bus_event_lock, OldIrql);
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KeSetEvent(&AcpiEventQueue, IO_NO_INCREMENT, FALSE);
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}
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|
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int
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acpi_bus_generate_event (
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struct acpi_device *device,
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UINT8 type,
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int data)
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{
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ULONG_PTR TypeData = 0;
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DPRINT("acpi_bus_generate_event\n");
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if (!device)
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return_VALUE(AE_BAD_PARAMETER);
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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_VALUE(0);
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/* Data shouldn't even get near 24 bits */
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ASSERT(!(data & 0xFF000000));
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TypeData = data;
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TypeData |= type << 24;
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KeInsertQueueDpc(&event_dpc, device, (PVOID)TypeData);
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return_VALUE(0);
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}
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|
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int
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acpi_bus_receive_event (
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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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KIRQL OldIrql;
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//DECLARE_WAITQUEUE(wait, current);
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DPRINT("acpi_bus_receive_event\n");
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if (!event)
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return AE_BAD_PARAMETER;
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event_is_open++;
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KeWaitForSingleObject(&AcpiEventQueue,
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Executive,
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KernelMode,
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FALSE,
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NULL);
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event_is_open--;
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KeClearEvent(&AcpiEventQueue);
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|
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if (list_empty(&acpi_bus_event_list))
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return_VALUE(AE_NOT_FOUND);
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|
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// spin_lock_irqsave(&acpi_bus_event_lock, flags);
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KeAcquireSpinLock(&acpi_bus_event_lock, &OldIrql);
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entry = list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node);
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if (entry)
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list_del(&entry->node);
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KeReleaseSpinLock(&acpi_bus_event_lock, OldIrql);
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// spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
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|
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if (!entry)
|
|
return_VALUE(AE_NOT_FOUND);
|
|
|
|
memcpy(event, entry, sizeof(struct acpi_bus_event));
|
|
|
|
ExFreePoolWithTag(entry, 'epcA');
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Namespace Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
|
/**
|
|
* acpi_bus_walk
|
|
* -------------
|
|
* Used to walk the ACPI Bus's device namespace. Can walk down (depth-first)
|
|
* or up. Able to parse starting at any node in the namespace. Note that a
|
|
* callback return value of -249 will terminate the walk.
|
|
*
|
|
* @start: starting point
|
|
* callback: function to call for every device encountered while parsing
|
|
* direction: direction to parse (up or down)
|
|
* @data: context for this search operation
|
|
*/
|
|
static int
|
|
acpi_bus_walk (
|
|
struct acpi_device *start,
|
|
acpi_bus_walk_callback callback,
|
|
int direction,
|
|
void *data)
|
|
{
|
|
int result = 0;
|
|
int level = 0;
|
|
struct acpi_device *device = NULL;
|
|
|
|
if (!start || !callback)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
device = start;
|
|
|
|
/*
|
|
* Parse Namespace
|
|
* ---------------
|
|
* Parse a given subtree (specified by start) in the given direction.
|
|
* Walking 'up' simply means that we execute the callback on leaf
|
|
* devices prior to their parents (useful for things like removing
|
|
* or powering down a subtree).
|
|
*/
|
|
|
|
while (device) {
|
|
|
|
if (direction == WALK_DOWN)
|
|
if (-249 == callback(device, level, data))
|
|
break;
|
|
|
|
/* Depth First */
|
|
|
|
if (HAS_CHILDREN(device)) {
|
|
device = NODE_TO_DEVICE(device->children.next);
|
|
++level;
|
|
continue;
|
|
}
|
|
|
|
if (direction == WALK_UP)
|
|
if (-249 == callback(device, level, data))
|
|
break;
|
|
|
|
/* Now Breadth */
|
|
|
|
if (HAS_SIBLINGS(device)) {
|
|
device = NODE_TO_DEVICE(device->node.next);
|
|
continue;
|
|
}
|
|
|
|
/* Scope Exhausted - Find Next */
|
|
|
|
while ((device = device->parent)) {
|
|
--level;
|
|
if (HAS_SIBLINGS(device)) {
|
|
device = NODE_TO_DEVICE(device->node.next);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((direction == WALK_UP) && (result == 0))
|
|
callback(start, level, data);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Notification Handling
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
acpi_bus_check_device (ACPI_HANDLE handle)
|
|
{
|
|
struct acpi_device *device;
|
|
ACPI_STATUS status = 0;
|
|
struct acpi_device_status old_status;
|
|
|
|
if (acpi_bus_get_device(handle, &device))
|
|
return;
|
|
if (!device)
|
|
return;
|
|
|
|
old_status = device->status;
|
|
|
|
/*
|
|
* Make sure this device's parent is present before we go about
|
|
* messing with the device.
|
|
*/
|
|
if (device->parent && !device->parent->status.present) {
|
|
device->status = device->parent->status;
|
|
return;
|
|
}
|
|
|
|
status = acpi_bus_get_status(device);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
|
|
return;
|
|
|
|
|
|
/*
|
|
* Device Insertion/Removal
|
|
*/
|
|
if ((device->status.present) && !(old_status.present)) {
|
|
DPRINT("Device insertion detected\n");
|
|
/* TBD: Handle device insertion */
|
|
}
|
|
else if (!(device->status.present) && (old_status.present)) {
|
|
DPRINT("Device removal detected\n");
|
|
/* TBD: Handle device removal */
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void
|
|
acpi_bus_check_scope (ACPI_HANDLE handle)
|
|
{
|
|
/* Status Change? */
|
|
acpi_bus_check_device(handle);
|
|
|
|
/*
|
|
* TBD: Enumerate child devices within this device's scope and
|
|
* run acpi_bus_check_device()'s on them.
|
|
*/
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_notify
|
|
* ---------------
|
|
* Callback for all 'system-level' device notifications (values 0x00-0x7F).
|
|
*/
|
|
static void
|
|
acpi_bus_notify (
|
|
ACPI_HANDLE handle,
|
|
UINT32 type,
|
|
void *data)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_driver *driver;
|
|
|
|
DPRINT1("Notification %#02x to handle %p\n", type, handle);
|
|
|
|
//blocking_notifier_call_chain(&acpi_bus_notify_list,
|
|
// type, (void *)handle);
|
|
|
|
acpi_bus_get_device(handle, &device);
|
|
|
|
switch (type) {
|
|
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
DPRINT("Received BUS CHECK notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
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:
|
|
DPRINT("Received DEVICE CHECK notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
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:
|
|
DPRINT("Received DEVICE WAKE notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
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_EJECT_REQUEST:
|
|
DPRINT1("Received EJECT REQUEST notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
|
|
DPRINT1("Received DEVICE CHECK LIGHT notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
/* TBD: Exactly what does 'light' mean? */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
|
|
DPRINT1("Received FREQUENCY MISMATCH notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
|
|
DPRINT1("Received BUS MODE MISMATCH notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_POWER_FAULT:
|
|
DPRINT1("Received POWER FAULT notification for device [%s]\n",
|
|
device ? device->pnp.bus_id : "n/a");
|
|
/* TBD */
|
|
break;
|
|
|
|
default:
|
|
DPRINT1("Received unknown/unsupported notification [%08x] for device [%s]\n",
|
|
type, device ? device->pnp.bus_id : "n/a");
|
|
break;
|
|
}
|
|
|
|
if (device) {
|
|
driver = device->driver;
|
|
if (driver && driver->ops.notify &&
|
|
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
|
|
driver->ops.notify(device, type);
|
|
}
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
|
static LIST_HEAD(acpi_bus_drivers);
|
|
//static DECLARE_MUTEX(acpi_bus_drivers_lock);
|
|
static FAST_MUTEX acpi_bus_drivers_lock;
|
|
|
|
|
|
/**
|
|
* acpi_bus_match
|
|
* --------------
|
|
* Checks the device's hardware (_HID) or compatible (_CID) ids to see if it
|
|
* matches the specified driver's criteria.
|
|
*/
|
|
static int
|
|
acpi_bus_match (
|
|
struct acpi_device *device,
|
|
struct acpi_driver *driver)
|
|
{
|
|
int error = 0;
|
|
|
|
if (device->flags.hardware_id)
|
|
if (strstr(driver->ids, device->pnp.hardware_id))
|
|
goto Done;
|
|
|
|
if (device->flags.compatible_ids) {
|
|
ACPI_PNP_DEVICE_ID_LIST *cid_list = device->pnp.cid_list;
|
|
int i;
|
|
|
|
/* compare multiple _CID entries against driver ids */
|
|
for (i = 0; i < cid_list->Count; i++)
|
|
{
|
|
if (strstr(driver->ids, cid_list->Ids[i].String))
|
|
goto Done;
|
|
}
|
|
}
|
|
error = -2;
|
|
|
|
Done:
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_driver_init
|
|
* --------------------
|
|
* Used to initialize a device via its device driver. Called whenever a
|
|
* driver is bound to a device. Invokes the driver's add() and start() ops.
|
|
*/
|
|
static int
|
|
acpi_bus_driver_init (
|
|
struct acpi_device *device,
|
|
struct acpi_driver *driver)
|
|
{
|
|
int result = 0;
|
|
|
|
if (!device || !driver)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
if (!driver->ops.add)
|
|
return_VALUE(-38);
|
|
|
|
result = driver->ops.add(device);
|
|
if (result) {
|
|
device->driver = NULL;
|
|
//acpi_driver_data(device) = NULL;
|
|
return_VALUE(result);
|
|
}
|
|
|
|
device->driver = driver;
|
|
|
|
/*
|
|
* TBD - Configuration Management: Assign resources to device based
|
|
* upon possible configuration and currently allocated resources.
|
|
*/
|
|
|
|
if (driver->ops.start) {
|
|
result = driver->ops.start(device);
|
|
if (result && driver->ops.remove)
|
|
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
|
|
return_VALUE(result);
|
|
}
|
|
|
|
DPRINT("Driver successfully bound to device\n");
|
|
|
|
if (driver->ops.scan) {
|
|
driver->ops.scan(device);
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_attach
|
|
* -------------
|
|
* Callback for acpi_bus_walk() used to find devices that match a specific
|
|
* driver's criteria and then attach the driver.
|
|
*/
|
|
static int
|
|
acpi_bus_attach (
|
|
struct acpi_device *device,
|
|
int level,
|
|
void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_driver *driver = NULL;
|
|
|
|
if (!device || !data)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
driver = (struct acpi_driver *) data;
|
|
|
|
if (device->driver)
|
|
return_VALUE(-9);
|
|
|
|
if (!device->status.present)
|
|
return_VALUE(AE_NOT_FOUND);
|
|
|
|
result = acpi_bus_match(device, driver);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
DPRINT("Found driver [%s] for device [%s]\n",
|
|
driver->name, device->pnp.bus_id);
|
|
|
|
result = acpi_bus_driver_init(device, driver);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
down(&acpi_bus_drivers_lock);
|
|
++driver->references;
|
|
up(&acpi_bus_drivers_lock);
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_unattach
|
|
* -----------------
|
|
* Callback for acpi_bus_walk() used to find devices that match a specific
|
|
* driver's criteria and unattach the driver.
|
|
*/
|
|
static int
|
|
acpi_bus_unattach (
|
|
struct acpi_device *device,
|
|
int level,
|
|
void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_driver *driver = (struct acpi_driver *) data;
|
|
|
|
if (!device || !driver)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
if (device->driver != driver)
|
|
return_VALUE(-6);
|
|
|
|
if (!driver->ops.remove)
|
|
return_VALUE(-23);
|
|
|
|
result = driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
device->driver = NULL;
|
|
acpi_driver_data(device) = NULL;
|
|
|
|
down(&acpi_bus_drivers_lock);
|
|
driver->references--;
|
|
up(&acpi_bus_drivers_lock);
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_find_driver
|
|
* --------------------
|
|
* Parses the list of registered drivers looking for a driver applicable for
|
|
* the specified device.
|
|
*/
|
|
static int
|
|
acpi_bus_find_driver (
|
|
struct acpi_device *device)
|
|
{
|
|
int result = AE_NOT_FOUND;
|
|
struct list_head *entry = NULL;
|
|
struct acpi_driver *driver = NULL;
|
|
|
|
if (!device || device->driver)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
down(&acpi_bus_drivers_lock);
|
|
|
|
list_for_each(entry, &acpi_bus_drivers) {
|
|
|
|
driver = list_entry(entry, struct acpi_driver, node);
|
|
|
|
if (acpi_bus_match(device, driver))
|
|
continue;
|
|
|
|
result = acpi_bus_driver_init(device, driver);
|
|
if (!result)
|
|
++driver->references;
|
|
|
|
break;
|
|
}
|
|
|
|
up(&acpi_bus_drivers_lock);
|
|
|
|
return_VALUE(result);
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_register_driver
|
|
* ------------------------
|
|
* Registers a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and binds.
|
|
*/
|
|
int
|
|
acpi_bus_register_driver (
|
|
struct acpi_driver *driver)
|
|
{
|
|
if (!driver)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
//if (acpi_disabled)
|
|
// return_VALUE(AE_NOT_FOUND);
|
|
|
|
down(&acpi_bus_drivers_lock);
|
|
list_add_tail(&driver->node, &acpi_bus_drivers);
|
|
up(&acpi_bus_drivers_lock);
|
|
|
|
acpi_bus_walk(acpi_root, acpi_bus_attach,
|
|
WALK_DOWN, driver);
|
|
|
|
return_VALUE(driver->references);
|
|
}
|
|
|
|
|
|
/**
|
|
* acpi_bus_unregister_driver
|
|
* --------------------------
|
|
* Unregisters a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and unbinds.
|
|
*/
|
|
void
|
|
acpi_bus_unregister_driver (
|
|
struct acpi_driver *driver)
|
|
{
|
|
if (!driver)
|
|
return;
|
|
|
|
acpi_bus_walk(acpi_root, acpi_bus_unattach, WALK_UP, driver);
|
|
|
|
if (driver->references)
|
|
return;
|
|
|
|
down(&acpi_bus_drivers_lock);
|
|
list_del(&driver->node);
|
|
up(&acpi_bus_drivers_lock);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Device Enumeration
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int
|
|
acpi_bus_get_flags (
|
|
struct acpi_device *device)
|
|
{
|
|
ACPI_STATUS status = AE_OK;
|
|
ACPI_HANDLE temp = NULL;
|
|
|
|
/* Presence of _STA indicates 'dynamic_status' */
|
|
status = AcpiGetHandle(device->handle, "_STA", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.dynamic_status = 1;
|
|
|
|
/* Presence of _CID indicates 'compatible_ids' */
|
|
status = AcpiGetHandle(device->handle, "_CID", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.compatible_ids = 1;
|
|
|
|
/* Presence of _RMV indicates 'removable' */
|
|
status = AcpiGetHandle(device->handle, "_RMV", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.removable = 1;
|
|
|
|
/* Presence of _EJD|_EJ0 indicates 'ejectable' */
|
|
status = AcpiGetHandle(device->handle, "_EJD", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.ejectable = 1;
|
|
else {
|
|
status = AcpiGetHandle(device->handle, "_EJ0", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.ejectable = 1;
|
|
}
|
|
|
|
/* Presence of _LCK indicates 'lockable' */
|
|
status = AcpiGetHandle(device->handle, "_LCK", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.lockable = 1;
|
|
|
|
/* Presence of _PS0|_PR0 indicates 'power manageable' */
|
|
status = AcpiGetHandle(device->handle, "_PS0", &temp);
|
|
if (ACPI_FAILURE(status))
|
|
status = AcpiGetHandle(device->handle, "_PR0", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.power_manageable = 1;
|
|
|
|
/* TBD: Performance management */
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
int
|
|
acpi_bus_add (
|
|
struct acpi_device **child,
|
|
struct acpi_device *parent,
|
|
ACPI_HANDLE handle,
|
|
int type)
|
|
{
|
|
int result = 0;
|
|
ACPI_STATUS status = AE_OK;
|
|
struct acpi_device *device = NULL;
|
|
char bus_id[5] = {'?',0};
|
|
ACPI_BUFFER buffer;
|
|
ACPI_DEVICE_INFO *info = NULL;
|
|
char *hid = NULL;
|
|
char *uid = NULL;
|
|
ACPI_PNP_DEVICE_ID_LIST *cid_list = NULL;
|
|
int i = 0;
|
|
acpi_unique_id static_uid_buffer;
|
|
|
|
if (!child)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
device = ExAllocatePoolWithTag(NonPagedPool,sizeof(struct acpi_device), 'DpcA');
|
|
if (!device) {
|
|
DPRINT1("Memory allocation error\n");
|
|
return_VALUE(-12);
|
|
}
|
|
memset(device, 0, sizeof(struct acpi_device));
|
|
|
|
device->handle = handle;
|
|
device->parent = parent;
|
|
|
|
/*
|
|
* Bus ID
|
|
* ------
|
|
* The device's Bus ID is simply the object name.
|
|
* TBD: Shouldn't this value be unique (within the ACPI namespace)?
|
|
*/
|
|
switch (type) {
|
|
case ACPI_BUS_TYPE_SYSTEM:
|
|
snprintf(device->pnp.bus_id, sizeof(device->pnp.bus_id), "%s", "ACPI");
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER_BUTTONF:
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
snprintf(device->pnp.bus_id, sizeof(device->pnp.bus_id), "%s", "PWRF");
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTONF:
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
snprintf(device->pnp.bus_id, sizeof(device->pnp.bus_id), "%s", "SLPF");
|
|
break;
|
|
default:
|
|
buffer.Length = sizeof(bus_id);
|
|
buffer.Pointer = bus_id;
|
|
AcpiGetName(handle, ACPI_SINGLE_NAME, &buffer);
|
|
|
|
|
|
/* Clean up trailing underscores (if any) */
|
|
for (i = 3; i > 1; i--) {
|
|
if (bus_id[i] == '_')
|
|
bus_id[i] = '\0';
|
|
else
|
|
break;
|
|
}
|
|
snprintf(device->pnp.bus_id, sizeof(device->pnp.bus_id), "%s", bus_id);
|
|
buffer.Pointer = NULL;
|
|
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Flags
|
|
* -----
|
|
* Get prior to calling acpi_bus_get_status() so we know whether
|
|
* or not _STA is present. Note that we only look for object
|
|
* handles -- cannot evaluate objects until we know the device is
|
|
* present and properly initialized.
|
|
*/
|
|
result = acpi_bus_get_flags(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
/*
|
|
* Status
|
|
* ------
|
|
* See if the device is present. We always assume that non-Device()
|
|
* objects (e.g. thermal zones, power resources, processors, etc.) are
|
|
* present, functioning, etc. (at least when parent object is present).
|
|
* Note that _STA has a different meaning for some objects (e.g.
|
|
* power resources) so we need to be careful how we use it.
|
|
*/
|
|
switch (type) {
|
|
case ACPI_BUS_TYPE_DEVICE:
|
|
result = acpi_bus_get_status(device);
|
|
if (result)
|
|
goto end;
|
|
break;
|
|
default:
|
|
STRUCT_TO_INT(device->status) = 0x0F;
|
|
break;
|
|
}
|
|
if (!device->status.present) {
|
|
result = -2;
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Initialize Device
|
|
* -----------------
|
|
* TBD: Synch with Core's enumeration/initialization process.
|
|
*/
|
|
|
|
/*
|
|
* Hardware ID, Unique ID, & Bus Address
|
|
* -------------------------------------
|
|
*/
|
|
switch (type) {
|
|
case ACPI_BUS_TYPE_DEVICE:
|
|
status = AcpiGetObjectInfo(handle,&info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error reading device info\n"));
|
|
result = AE_NOT_FOUND;
|
|
info = NULL;
|
|
goto end;
|
|
}
|
|
if (info->Valid & ACPI_VALID_HID)
|
|
hid = info->HardwareId.String;
|
|
if (info->Valid & ACPI_VALID_UID)
|
|
uid = info->UniqueId.String;
|
|
if (info->Valid & ACPI_VALID_CID) {
|
|
cid_list = &info->CompatibleIdList;
|
|
device->pnp.cid_list = ExAllocatePoolWithTag(NonPagedPool,cid_list->ListSize, 'DpcA');
|
|
if (device->pnp.cid_list) {
|
|
char *p = (char *)&device->pnp.cid_list->Ids[cid_list->Count];
|
|
device->pnp.cid_list->Count = cid_list->Count;
|
|
device->pnp.cid_list->ListSize = cid_list->ListSize;
|
|
for (i = 0; i < cid_list->Count; i++) {
|
|
device->pnp.cid_list->Ids[i].Length = cid_list->Ids[i].Length;
|
|
device->pnp.cid_list->Ids[i].String = p;
|
|
ASSERT(p + cid_list->Ids[i].Length <= (char *)device->pnp.cid_list + cid_list->ListSize);
|
|
memcpy(device->pnp.cid_list->Ids[i].String,
|
|
cid_list->Ids[i].String, cid_list->Ids[i].Length);
|
|
p += cid_list->Ids[i].Length;
|
|
}
|
|
}
|
|
else
|
|
DPRINT("Memory allocation error\n");
|
|
}
|
|
if (info->Valid & ACPI_VALID_ADR) {
|
|
device->pnp.bus_address = info->Address;
|
|
device->flags.bus_address = 1;
|
|
}
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER:
|
|
hid = ACPI_POWER_HID;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (PowerDeviceCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_PROCESSOR:
|
|
hid = ACPI_PROCESSOR_HID;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "_%d", (ProcessorCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_SYSTEM:
|
|
hid = ACPI_SYSTEM_HID;
|
|
break;
|
|
case ACPI_BUS_TYPE_THERMAL:
|
|
hid = ACPI_THERMAL_HID;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (ThermalZoneCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
hid = ACPI_BUTTON_HID_POWER;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (PowerButtonCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER_BUTTONF:
|
|
hid = ACPI_BUTTON_HID_POWERF;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (FixedPowerButtonCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
hid = ACPI_BUTTON_HID_SLEEP;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (SleepButtonCount++));
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTONF:
|
|
hid = ACPI_BUTTON_HID_SLEEPF;
|
|
uid = static_uid_buffer;
|
|
snprintf(uid, sizeof(static_uid_buffer), "%d", (FixedSleepButtonCount++));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* \_SB
|
|
* ----
|
|
* Fix for the system root bus device -- the only root-level device.
|
|
*/
|
|
if (((ACPI_HANDLE)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
|
|
hid = ACPI_BUS_HID;
|
|
snprintf(device->pnp.device_name, sizeof(device->pnp.device_name), "%s", ACPI_BUS_DEVICE_NAME);
|
|
snprintf(device->pnp.device_class, sizeof(device->pnp.device_class), "%s", ACPI_BUS_CLASS);
|
|
}
|
|
|
|
if (hid) {
|
|
device->pnp.hardware_id = ExAllocatePoolWithTag(NonPagedPool, strlen(hid) + 1, 'DpcA');
|
|
if (device->pnp.hardware_id) {
|
|
snprintf(device->pnp.hardware_id, strlen(hid) + 1, "%s", hid);
|
|
device->flags.hardware_id = 1;
|
|
}
|
|
}
|
|
if (uid) {
|
|
snprintf(device->pnp.unique_id, sizeof(device->pnp.unique_id), "%s", uid);
|
|
device->flags.unique_id = 1;
|
|
}
|
|
|
|
/*
|
|
* If we called get_object_info, we now are finished with the buffer,
|
|
* so we can free it.
|
|
*/
|
|
//if (buffer.Pointer)
|
|
//AcpiOsFree(buffer.Pointer);
|
|
|
|
/*
|
|
* Power Management
|
|
* ----------------
|
|
*/
|
|
if (device->flags.power_manageable) {
|
|
result = acpi_bus_get_power_flags(device);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Performance Management
|
|
* ----------------------
|
|
*/
|
|
if (device->flags.performance_manageable) {
|
|
result = acpi_bus_get_perf_flags(device);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Context
|
|
* -------
|
|
* Attach this 'struct acpi_device' to the ACPI object. This makes
|
|
* resolutions from handle->device very efficient. Note that we need
|
|
* to be careful with fixed-feature devices as they all attach to the
|
|
* root object.
|
|
*/
|
|
switch (type) {
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
case ACPI_BUS_TYPE_POWER_BUTTONF:
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTONF:
|
|
break;
|
|
default:
|
|
status = AcpiAttachData(device->handle,
|
|
acpi_bus_data_handler, device);
|
|
break;
|
|
}
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error attaching device data\n"));
|
|
result = AE_NOT_FOUND;
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Linkage
|
|
* -------
|
|
* Link this device to its parent and siblings.
|
|
*/
|
|
INIT_LIST_HEAD(&device->children);
|
|
if (!device->parent)
|
|
INIT_LIST_HEAD(&device->node);
|
|
else
|
|
list_add_tail(&device->node, &device->parent->children);
|
|
|
|
/*
|
|
* Global Device Hierarchy:
|
|
* ------------------------
|
|
* Register this device with the global device hierarchy.
|
|
*/
|
|
acpi_device_register(device, parent);
|
|
|
|
/*
|
|
* Bind _ADR-Based Devices
|
|
* -----------------------
|
|
* If there's a a bus address (_ADR) then we utilize the parent's
|
|
* 'bind' function (if exists) to bind the ACPI- and natively-
|
|
* enumerated device representations.
|
|
*/
|
|
if (device->flags.bus_address) {
|
|
if (device->parent && device->parent->ops.bind)
|
|
device->parent->ops.bind(device);
|
|
}
|
|
|
|
/*
|
|
* Locate & Attach Driver
|
|
* ----------------------
|
|
* If there's a hardware id (_HID) or compatible ids (_CID) we check
|
|
* to see if there's a driver installed for this kind of device. Note
|
|
* that drivers can install before or after a device is enumerated.
|
|
*
|
|
* TBD: Assumes LDM provides driver hot-plug capability.
|
|
*/
|
|
if (device->flags.hardware_id || device->flags.compatible_ids)
|
|
acpi_bus_find_driver(device);
|
|
|
|
end:
|
|
if (info != NULL)
|
|
ACPI_FREE(info);
|
|
if (result) {
|
|
if (device->pnp.cid_list) {
|
|
ExFreePoolWithTag(device->pnp.cid_list, 'DpcA');
|
|
}
|
|
if (device->pnp.hardware_id) {
|
|
ExFreePoolWithTag(device->pnp.hardware_id, 'DpcA');
|
|
}
|
|
ExFreePoolWithTag(device, 'DpcA');
|
|
return_VALUE(result);
|
|
}
|
|
*child = device;
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_bus_remove (
|
|
struct acpi_device *device,
|
|
int type)
|
|
{
|
|
|
|
if (!device)
|
|
return_VALUE(AE_NOT_FOUND);
|
|
|
|
acpi_device_unregister(device);
|
|
|
|
if (device->pnp.cid_list)
|
|
ExFreePoolWithTag(device->pnp.cid_list, 'DpcA');
|
|
|
|
if (device->pnp.hardware_id)
|
|
ExFreePoolWithTag(device->pnp.hardware_id, 'DpcA');
|
|
|
|
if (device)
|
|
ExFreePoolWithTag(device, 'DpcA');
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
int
|
|
acpi_bus_scan (
|
|
struct acpi_device *start)
|
|
{
|
|
ACPI_STATUS status = AE_OK;
|
|
struct acpi_device *parent = NULL;
|
|
struct acpi_device *child = NULL;
|
|
ACPI_HANDLE phandle = 0;
|
|
ACPI_HANDLE chandle = 0;
|
|
ACPI_OBJECT_TYPE type = 0;
|
|
UINT32 level = 1;
|
|
|
|
if (!start)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
parent = start;
|
|
phandle = start->handle;
|
|
|
|
/*
|
|
* Parse through the ACPI namespace, identify all 'devices', and
|
|
* create a new 'struct acpi_device' for each.
|
|
*/
|
|
while ((level > 0) && parent) {
|
|
|
|
status = AcpiGetNextObject(ACPI_TYPE_ANY, phandle,
|
|
chandle, &chandle);
|
|
|
|
/*
|
|
* If this scope is exhausted then move our way back up.
|
|
*/
|
|
if (ACPI_FAILURE(status)) {
|
|
level--;
|
|
chandle = phandle;
|
|
AcpiGetParent(phandle, &phandle);
|
|
if (parent->parent)
|
|
parent = parent->parent;
|
|
continue;
|
|
}
|
|
|
|
status = AcpiGetType(chandle, &type);
|
|
if (ACPI_FAILURE(status))
|
|
continue;
|
|
|
|
/*
|
|
* If this is a scope object then parse it (depth-first).
|
|
*/
|
|
if (type == ACPI_TYPE_LOCAL_SCOPE) {
|
|
level++;
|
|
phandle = chandle;
|
|
chandle = 0;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* We're only interested in objects that we consider 'devices'.
|
|
*/
|
|
switch (type) {
|
|
case ACPI_TYPE_DEVICE:
|
|
type = ACPI_BUS_TYPE_DEVICE;
|
|
break;
|
|
case ACPI_TYPE_PROCESSOR:
|
|
type = ACPI_BUS_TYPE_PROCESSOR;
|
|
break;
|
|
case ACPI_TYPE_THERMAL:
|
|
type = ACPI_BUS_TYPE_THERMAL;
|
|
break;
|
|
case ACPI_TYPE_POWER:
|
|
type = ACPI_BUS_TYPE_POWER;
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
status = acpi_bus_add(&child, parent, chandle, type);
|
|
if (ACPI_FAILURE(status))
|
|
continue;
|
|
|
|
/*
|
|
* If the device is present, enabled, and functioning then
|
|
* parse its scope (depth-first). Note that we need to
|
|
* represent absent devices to facilitate PnP notifications
|
|
* -- but only the subtree head (not all of its children,
|
|
* which will be enumerated when the parent is inserted).
|
|
*
|
|
* TBD: Need notifications and other detection mechanisms
|
|
* in place before we can fully implement this.
|
|
*/
|
|
if (child->status.present) {
|
|
status = AcpiGetNextObject(ACPI_TYPE_ANY, chandle,
|
|
0, NULL);
|
|
if (ACPI_SUCCESS(status)) {
|
|
level++;
|
|
phandle = chandle;
|
|
chandle = 0;
|
|
parent = child;
|
|
}
|
|
}
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_bus_scan_fixed (
|
|
struct acpi_device *root)
|
|
{
|
|
int result = 0;
|
|
struct acpi_device *device = NULL;
|
|
|
|
if (!root)
|
|
return_VALUE(AE_NOT_FOUND);
|
|
|
|
/* If ACPI_FADT_POWER_BUTTON is set, then a control
|
|
* method power button is present. Otherwise, a fixed
|
|
* power button is present.
|
|
*/
|
|
if (AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON)
|
|
result = acpi_bus_add(&device, acpi_root,
|
|
NULL, ACPI_BUS_TYPE_POWER_BUTTON);
|
|
else
|
|
{
|
|
/* Enable the fixed power button so we get notified if it is pressed */
|
|
AcpiWriteBitRegister(ACPI_BITREG_POWER_BUTTON_ENABLE, 1);
|
|
|
|
result = acpi_bus_add(&device, acpi_root,
|
|
NULL, ACPI_BUS_TYPE_POWER_BUTTONF);
|
|
}
|
|
|
|
/* This one is a bit more complicated and we do it wrong
|
|
* right now. If ACPI_FADT_SLEEP_BUTTON is set but no
|
|
* device object is present then no sleep button is present, but
|
|
* if the flags is clear and there is no device object then it is
|
|
* a fixed sleep button. If the flag is set and there is a device object
|
|
* the we have a control method button just like above.
|
|
*/
|
|
if (AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON)
|
|
result = acpi_bus_add(&device, acpi_root,
|
|
NULL, ACPI_BUS_TYPE_SLEEP_BUTTON);
|
|
else
|
|
{
|
|
/* Enable the fixed sleep button so we get notified if it is pressed */
|
|
AcpiWriteBitRegister(ACPI_BITREG_SLEEP_BUTTON_ENABLE, 1);
|
|
|
|
result = acpi_bus_add(&device, acpi_root,
|
|
NULL, ACPI_BUS_TYPE_SLEEP_BUTTONF);
|
|
}
|
|
|
|
return_VALUE(result);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Initialization/Cleanup
|
|
-------------------------------------------------------------------------- */
|
|
|
|
int
|
|
acpi_bus_init (void)
|
|
{
|
|
int result = 0;
|
|
ACPI_STATUS status = AE_OK;
|
|
|
|
DPRINT("acpi_bus_init\n");
|
|
|
|
KeInitializeDpc(&event_dpc, acpi_bus_generate_event_dpc, NULL);
|
|
|
|
status = AcpiEnableSubsystem(ACPI_FULL_INITIALIZATION);
|
|
if (ACPI_FAILURE(status)) {
|
|
DPRINT1("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. This is accomplished
|
|
* by looking for the ECDT table, and getting the EC parameters out
|
|
* of that.
|
|
*/
|
|
//result = acpi_ec_ecdt_probe();
|
|
/* Ignore result. Not having an ECDT is not fatal. */
|
|
|
|
status = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION);
|
|
if (ACPI_FAILURE(status)) {
|
|
DPRINT1("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();
|
|
|
|
/* Initialize sleep structures */
|
|
//acpi_sleep_init();
|
|
|
|
/*
|
|
* Register the for all standard device notifications.
|
|
*/
|
|
status = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, acpi_bus_notify, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
DPRINT1("Unable to register for device notifications\n");
|
|
result = AE_NOT_FOUND;
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* Create the root device in the bus's device tree
|
|
*/
|
|
result = acpi_bus_add(&acpi_root, NULL, ACPI_ROOT_OBJECT,
|
|
ACPI_BUS_TYPE_SYSTEM);
|
|
if (result)
|
|
goto error2;
|
|
|
|
|
|
/*
|
|
* Enumerate devices in the ACPI namespace.
|
|
*/
|
|
result = acpi_bus_scan_fixed(acpi_root);
|
|
if (result)
|
|
DPRINT1("acpi_bus_scan_fixed failed\n");
|
|
result = acpi_bus_scan(acpi_root);
|
|
if (result)
|
|
DPRINT1("acpi_bus_scan failed\n");
|
|
|
|
return_VALUE(0);
|
|
|
|
/* Mimic structured exception handling */
|
|
error2:
|
|
AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT,
|
|
ACPI_SYSTEM_NOTIFY, acpi_bus_notify);
|
|
error1:
|
|
AcpiTerminate();
|
|
return_VALUE(AE_NOT_FOUND);
|
|
}
|
|
|
|
static void
|
|
acpi_bus_exit (void)
|
|
{
|
|
ACPI_STATUS status = AE_OK;
|
|
|
|
DPRINT1("acpi_bus_exit\n");
|
|
|
|
status = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT,
|
|
ACPI_SYSTEM_NOTIFY, acpi_bus_notify);
|
|
if (ACPI_FAILURE(status))
|
|
DPRINT1("Error removing notify handler\n");
|
|
|
|
#ifdef CONFIG_ACPI_PCI
|
|
acpi_pci_root_exit();
|
|
acpi_pci_link_exit();
|
|
#endif
|
|
#ifdef CONFIG_ACPI_EC
|
|
acpi_ec_exit();
|
|
#endif
|
|
//acpi_power_exit();
|
|
acpi_system_exit();
|
|
|
|
acpi_bus_remove(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
|
|
|
|
status = AcpiTerminate();
|
|
if (ACPI_FAILURE(status))
|
|
DPRINT1("Unable to terminate the ACPI Interpreter\n");
|
|
else
|
|
DPRINT1("Interpreter disabled\n");
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
int
|
|
acpi_init (void)
|
|
{
|
|
int result = 0;
|
|
|
|
DPRINT("acpi_init\n");
|
|
|
|
DPRINT("Subsystem revision %08x\n",ACPI_CA_VERSION);
|
|
|
|
KeInitializeSpinLock(&acpi_bus_event_lock);
|
|
KeInitializeEvent(&AcpiEventQueue, NotificationEvent, FALSE);
|
|
ExInitializeFastMutex(&acpi_bus_drivers_lock);
|
|
|
|
result = acpi_bus_init();
|
|
|
|
//if (!result) {
|
|
//pci_mmcfg_late_init();
|
|
//if (!(pm_flags & PM_APM))
|
|
// pm_flags |= PM_ACPI;
|
|
//else {
|
|
//DPRINT1("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);
|
|
|
|
/*
|
|
* Install drivers required for proper enumeration of the
|
|
* ACPI namespace.
|
|
*/
|
|
acpi_system_init(); /* ACPI System */
|
|
acpi_power_init(); /* ACPI Bus Power Management */
|
|
acpi_button_init();
|
|
//acpi_ec_init(); /* ACPI Embedded Controller */
|
|
#ifdef CONFIG_ACPI_PCI
|
|
if (!acpi_pci_disabled) {
|
|
acpi_pci_link_init(); /* ACPI PCI Interrupt Link */
|
|
acpi_pci_root_init(); /* ACPI PCI Root Bridge */
|
|
}
|
|
#endif
|
|
|
|
//acpi_scan_init();
|
|
//acpi_ec_init();
|
|
//acpi_power_init();
|
|
//acpi_system_init();
|
|
//acpi_debug_init();
|
|
//acpi_sleep_proc_init();
|
|
//acpi_wakeup_device_init();
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
void
|
|
acpi_exit (void)
|
|
{
|
|
DPRINT("acpi_exit\n");
|
|
|
|
#ifdef CONFIG_PM
|
|
pm_active = 0;
|
|
#endif
|
|
|
|
acpi_bus_exit();
|
|
|
|
return_VOID;
|
|
}
|
|
|