bmrequest.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /******************************************************************************
- *
- * Module Name: bmrequest.c
- * $Revision: 16 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 Andrew Grover
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <acpi.h>
- #include "bm.h"
- #define _COMPONENT ACPI_BUS
- MODULE_NAME ("bmrequest")
- /****************************************************************************
- * External Functions
- ****************************************************************************/
- /****************************************************************************
- *
- * FUNCTION: bm_generate_request
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- acpi_status
- bm_generate_request (
- BM_NODE *node,
- BM_REQUEST *request)
- {
- acpi_status status = AE_OK;
- BM_DEVICE *device = NULL;
- FUNCTION_TRACE("bm_generate_request");
- if (!node || !request) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
- device = &(node->device);
- if (!BM_IS_DRIVER_CONTROL(device)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No driver installed for device [%02x].n", device->handle));
- return_ACPI_STATUS(AE_NOT_EXIST);
- }
- status = node->driver.request(request, node->driver.context);
- return_ACPI_STATUS(status);
- }
- /****************************************************************************
- *
- * FUNCTION: bm_request
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- acpi_status
- bm_request (
- BM_REQUEST *request)
- {
- acpi_status status = AE_OK;
- BM_NODE *node = NULL;
- BM_DEVICE *device = NULL;
- FUNCTION_TRACE("bm_request");
- /*
- * Must have a valid request structure.
- */
- if (!request) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received request for device [%02x] command [%02x].n", request->handle, request->command));
- /*
- * Resolve the node.
- */
- status = bm_get_node(request->handle, 0, &node);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- device = &(node->device);
- /*
- * Device-Specific Request?
- * ------------------------
- * If a device-specific command (>=0x80) forward this request to
- * the appropriate driver.
- */
- if (request->command & BM_COMMAND_DEVICE_SPECIFIC) {
- status = bm_generate_request(node, request);
- return_ACPI_STATUS(status);
- }
- /*
- * Bus-Specific Requests:
- * ----------------------
- */
- switch (request->command) {
- case BM_COMMAND_GET_POWER_STATE:
- status = bm_get_power_state(node);
- if (ACPI_FAILURE(status)) {
- break;
- }
- status = bm_copy_to_buffer(&(request->buffer),
- &(device->power.state), sizeof(BM_POWER_STATE));
- break;
- case BM_COMMAND_SET_POWER_STATE:
- {
- BM_POWER_STATE *power_state = NULL;
- status = bm_cast_buffer(&(request->buffer),
- (void**)&power_state, sizeof(BM_POWER_STATE));
- if (ACPI_FAILURE(status)) {
- break;
- }
- status = bm_set_power_state(node, *power_state);
- }
- break;
- default:
- status = AE_SUPPORT;
- request->status = AE_SUPPORT;
- break;
- }
- return_ACPI_STATUS(status);
- }