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164 lines
4 KiB
C
164 lines
4 KiB
C
/******************************************************************************
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*
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* Module Name: bmrequest.c
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 Andrew Grover
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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
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* (at 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_BUS_MANAGER
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MODULE_NAME ("bmrequest")
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/****************************************************************************
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* External Functions
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****************************************************************************/
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/****************************************************************************
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*
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* FUNCTION: bm_generate_request
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*
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* PARAMETERS: <TBD>
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*
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* RETURN: <TBD>
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*
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* DESCRIPTION: <TBD>
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*
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****************************************************************************/
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ACPI_STATUS
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bm_generate_request (
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BM_NODE *node,
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BM_REQUEST *request)
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{
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ACPI_STATUS status = AE_OK;
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FUNCTION_TRACE("bm_generate_request");
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if (!node || !request) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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DEBUG_PRINT(ACPI_INFO, ("Sending request [0x%02x] to device [0x%02x].\n", request->command, node->device.handle));
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if (!(node->device.flags & BM_FLAGS_DRIVER_CONTROL) ||
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!(node->driver.request)) {
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DEBUG_PRINT(ACPI_WARN, ("No driver installed for device [0x%02x].\n", node->device.handle));
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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status = node->driver.request(request, node->driver.context);
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return_ACPI_STATUS(status);
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}
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/****************************************************************************
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*
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* FUNCTION: bm_request
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*
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* PARAMETERS: <TBD>
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*
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* RETURN: <TBD>
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*
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* DESCRIPTION: <TBD>
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*
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****************************************************************************/
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ACPI_STATUS
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bm_request (
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BM_REQUEST *request)
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{
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ACPI_STATUS status = AE_OK;
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BM_NODE *node = NULL;
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BM_DEVICE *device = NULL;
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FUNCTION_TRACE("bm_request");
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/*
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* Must have a valid request structure.
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*/
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if (!request) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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DEBUG_PRINT(ACPI_INFO, ("Received request for device [0x%02x] command [0x%08x].\n", request->handle, request->command));
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/*
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* Resolve the node.
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*/
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status = bm_get_node(request->handle, 0, &node);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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device = &(node->device);
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/*
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* Device-Specific Request?
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* ------------------------
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* If a device-specific command (>=0x80) forward this request to
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* the appropriate driver.
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*/
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if (request->command & BM_COMMAND_DEVICE_SPECIFIC) {
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status = bm_generate_request(node, request);
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return_ACPI_STATUS(status);
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}
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/*
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* Bus-Specific Requests:
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* ----------------------
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*/
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switch (request->command) {
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case BM_COMMAND_GET_POWER_STATE:
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status = bm_get_power_state(node);
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if (ACPI_FAILURE(status)) {
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break;
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}
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status = bm_copy_to_buffer(&(request->buffer),
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&(device->power.state), sizeof(BM_POWER_STATE));
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break;
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case BM_COMMAND_SET_POWER_STATE:
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{
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BM_POWER_STATE *power_state = NULL;
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status = bm_cast_buffer(&(request->buffer),
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(void**)&power_state, sizeof(BM_POWER_STATE));
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if (ACPI_FAILURE(status)) {
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break;
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}
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status = bm_set_power_state(node, *power_state);
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}
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break;
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default:
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status = AE_SUPPORT;
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request->status = AE_SUPPORT;
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break;
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}
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return_ACPI_STATUS(status);
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}
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