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/******************************************************************************
*
* 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);
}
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