bmnotify.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /*****************************************************************************
- *
- * Module Name: bmnotify.c
- * $Revision: 21 $
- *
- *****************************************************************************/
- /*
- * 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 ("bmnotify")
- /****************************************************************************
- * Internal Functions
- ****************************************************************************/
- /****************************************************************************
- *
- * FUNCTION: bm_generate_notify
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- acpi_status
- bm_generate_notify (
- BM_NODE *node,
- u32 notify_type)
- {
- acpi_status status = AE_OK;
- BM_DEVICE *device = NULL;
- FUNCTION_TRACE("bm_generate_notify");
- if (!node) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
- device = &(node->device);
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Sending notify [%02x] to device [%02x].n", notify_type, node->device.handle));
- if (!BM_IS_DRIVER_CONTROL(device)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "No driver installed for device [%02x].n", device->handle));
- return_ACPI_STATUS(AE_NOT_EXIST);
- }
- status = node->driver.notify(notify_type, node->device.handle,
- &(node->driver.context));
- return_ACPI_STATUS(status);
- }
- /****************************************************************************
- *
- * FUNCTION: bm_device_check
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- acpi_status
- bm_device_check (
- BM_NODE *node,
- u32 *status_change)
- {
- acpi_status status = AE_OK;
- BM_DEVICE *device = NULL;
- BM_DEVICE_STATUS old_status = BM_STATUS_UNKNOWN;
- FUNCTION_TRACE("bm_device_check");
- if (!node) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
- device = &(node->device);
- if (status_change) {
- *status_change = FALSE;
- }
- old_status = device->status;
- /*
- * Parent Present?
- * ---------------
- * Only check this device if its parent is present (which implies
- * this device MAY be present).
- */
- if (!BM_NODE_PRESENT(node->parent)) {
- return_ACPI_STATUS(AE_OK);
- }
- /*
- * Get Status:
- * -----------
- * And see if the status has changed.
- */
- status = bm_get_status(device);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- if (old_status == node->device.status) {
- return_ACPI_STATUS(AE_OK);
- }
- if (status_change) {
- *status_change = TRUE;
- }
-
- /*
- * Device Insertion?
- * -----------------
- */
- if ((device->status & BM_STATUS_PRESENT) &&
- !(old_status & BM_STATUS_PRESENT)) {
- /* TBD: Make sure driver is loaded, and if not, load. */
- status = bm_generate_notify(node, BM_NOTIFY_DEVICE_ADDED);
- }
- /*
- * Device Removal?
- * ---------------
- */
- else if (!(device->status & BM_STATUS_PRESENT) &&
- (old_status & BM_STATUS_PRESENT)) {
- /* TBD: Unload driver if last device instance. */
- status = bm_generate_notify(node, BM_NOTIFY_DEVICE_REMOVED);
- }
- return_ACPI_STATUS(AE_OK);
- }
- /****************************************************************************
- *
- * FUNCTION: bm_bus_check
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- acpi_status
- bm_bus_check (
- BM_NODE *parent_node)
- {
- acpi_status status = AE_OK;
- u32 status_change = FALSE;
- FUNCTION_TRACE("bm_bus_check");
- if (!parent_node) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
- /*
- * Status Change?
- * --------------
- */
- status = bm_device_check(parent_node, &status_change);
- if (ACPI_FAILURE(status) || !status_change) {
- return_ACPI_STATUS(status);
- }
- /*
- * Enumerate Scope:
- * ----------------
- * TBD: Enumerate child devices within this device's scope and
- * run bm_device_check()'s on them...
- */
- return_ACPI_STATUS(AE_OK);
- }
- /****************************************************************************
- * External Functions
- ****************************************************************************/
- /****************************************************************************
- *
- * FUNCTION: bm_notify
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
- void
- bm_notify (
- acpi_handle acpi_handle,
- u32 notify_value,
- void *context)
- {
- acpi_status status = AE_OK;
- BM_NODE *node = NULL;
- FUNCTION_TRACE("bm_notify");
- /*
- * Resolve the ACPI handle.
- */
- status = bm_get_node(0, acpi_handle, &node);
- if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Recieved notify [%02x] for unknown device [%p].n", notify_value, acpi_handle));
- return_VOID;
- }
- /*
- * Device-Specific or Standard?
- * ----------------------------
- * Device-specific notifies are forwarded to the control module's
- * notify() function for processing. Standard notifies are handled
- * internally.
- */
- if (notify_value > 0x7F) {
- status = bm_generate_notify(node, notify_value);
- }
- else {
- switch (notify_value) {
- case BM_NOTIFY_BUS_CHECK:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received BUS CHECK notification for device [%02x].n", node->device.handle));
- status = bm_bus_check(node);
- break;
- case BM_NOTIFY_DEVICE_CHECK:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received DEVICE CHECK notification for device [%02x].n", node->device.handle));
- status = bm_device_check(node, NULL);
- break;
- case BM_NOTIFY_DEVICE_WAKE:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received DEVICE WAKE notification for device [%02x].n", node->device.handle));
- /* TBD */
- break;
- case BM_NOTIFY_EJECT_REQUEST:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received EJECT REQUEST notification for device [%02x].n", node->device.handle));
- /* TBD */
- break;
- case BM_NOTIFY_DEVICE_CHECK_LIGHT:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received DEVICE CHECK LIGHT notification for device [%02x].n", node->device.handle));
- /* TBD: Exactly what does the 'light' mean? */
- status = bm_device_check(node, NULL);
- break;
- case BM_NOTIFY_FREQUENCY_MISMATCH:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received FREQUENCY MISMATCH notification for device [%02x].n", node->device.handle));
- /* TBD */
- break;
- case BM_NOTIFY_BUS_MODE_MISMATCH:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received BUS MODE MISMATCH notification for device [%02x].n", node->device.handle));
- /* TBD */
- break;
- case BM_NOTIFY_POWER_FAULT:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received POWER FAULT notification.n"));
- /* TBD */
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Received unknown/unsupported notification.n"));
- break;
- }
- }
- return_VOID;
- }