Viewing file:  bt.c (14.23 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*****************************************************************************
*
* Module Name: bt.c
* $Revision: 29 $
*
*****************************************************************************/
/*
* 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 "bt.h"
#define _COMPONENT ACPI_BATTERY
MODULE_NAME ("bt")
/****************************************************************************
* Internal Functions
****************************************************************************/
/****************************************************************************
*
* FUNCTION: bt_print
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION: Prints out information on a specific battery.
*
****************************************************************************/
void
bt_print (
BT_CONTEXT *battery)
{
#ifdef ACPI_DEBUG
acpi_buffer buffer;
PROC_NAME("bt_print");
if (!battery) {
return;
}
buffer.length = 256;
buffer.pointer = acpi_os_callocate(buffer.length);
if (!buffer.pointer) {
return;
}
/*
* Get the full pathname for this ACPI object.
*/
acpi_get_name(battery->acpi_handle, ACPI_FULL_PATHNAME, &buffer);
/*
* Print out basic battery information.
*/
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "+------------------------------------------------------------\n"));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "| Battery[%02x]:[%p] %s\n", battery->device_handle, battery->acpi_handle, (char*)buffer.pointer));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "| uid[%s] is_present[%d] power_units[%s]\n", battery->uid, battery->is_present, battery->power_units));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "+------------------------------------------------------------\n"));
acpi_os_free(buffer.pointer);
#endif /*ACPI_DEBUG*/
return;
}
/****************************************************************************
*
* FUNCTION: bt_get_info
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
* NOTES: Allocates battery_info - which must be freed by the caller.
*
****************************************************************************/
acpi_status
bt_get_info (
BT_CONTEXT *battery,
BT_BATTERY_INFO **battery_info)
{
acpi_status status = AE_OK;
acpi_buffer bif_buffer, package_format, package_data;
acpi_object *package = NULL;
FUNCTION_TRACE("bt_get_info");
if (!battery || !battery_info || *battery_info) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
memset(&bif_buffer, 0, sizeof(acpi_buffer));
/*
* Evalute _BIF:
* -------------
* And be sure to deallocate bif_buffer.pointer!
*/
status = bm_evaluate_object(battery->acpi_handle, "_BIF", NULL,
&bif_buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Extract Package Data:
* ---------------------
* Type-cast this bif_buffer to a package and use helper
* functions to convert results into BT_BATTERY_INFO structure.
* The first attempt is just to get the size of the package
* data; the second gets the data (once we know the required
* bif_buffer size).
*/
status = bm_cast_buffer(&bif_buffer, (void**)&package,
sizeof(acpi_object));
if (ACPI_FAILURE(status)) {
goto end;
}
package_format.length = sizeof("NNNNNNNNNSSSS");
package_format.pointer = "NNNNNNNNNSSSS";
memset(&package_data, 0, sizeof(acpi_buffer));
status = bm_extract_package_data(package, &package_format,
&package_data);
if (status != AE_BUFFER_OVERFLOW) {
if (status == AE_OK) {
status = AE_ERROR;
}
goto end;
}
package_data.pointer = acpi_os_callocate(package_data.length);
if (!package_data.pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
status = bm_extract_package_data(package, &package_format,
&package_data);
if (ACPI_FAILURE(status)) {
acpi_os_free(package_data.pointer);
goto end;
}
*battery_info = package_data.pointer;
end:
acpi_os_free(bif_buffer.pointer);
return_ACPI_STATUS(status);
}
/****************************************************************************
*
* FUNCTION: bt_get_status
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_get_status (
BT_CONTEXT *battery,
BT_BATTERY_STATUS **battery_status)
{
acpi_status status = AE_OK;
acpi_buffer bst_buffer, package_format, package_data;
acpi_object *package = NULL;
FUNCTION_TRACE("bt_get_status");
if (!battery || !battery_status || *battery_status) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
memset(&bst_buffer, 0, sizeof(acpi_buffer));
/*
* Evalute _BST:
* -------------
* And be sure to deallocate bst_buffer.pointer!
*/
status = bm_evaluate_object(battery->acpi_handle, "_BST",
NULL, &bst_buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Extract Package Data:
* ---------------------
* Type-cast this bst_buffer to a package and use helper
* functions to convert results into BT_BATTERY_STATUS structure.
* The first attempt is just to get the size of the package data;
* the second gets the data (once we know the required bst_buffer
* size).
*/
status = bm_cast_buffer(&bst_buffer, (void**)&package,
sizeof(acpi_object));
if (ACPI_FAILURE(status)) {
goto end;
}
package_format.length = sizeof("NNNN");
package_format.pointer = "NNNN";
memset(&package_data, 0, sizeof(acpi_buffer));
status = bm_extract_package_data(package, &package_format,
&package_data);
if (status != AE_BUFFER_OVERFLOW) {
if (status == AE_OK) {
status = AE_ERROR;
}
goto end;
}
package_data.pointer = acpi_os_callocate(package_data.length);
if (!package_data.pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
status = bm_extract_package_data(package, &package_format,
&package_data);
if (ACPI_FAILURE(status)) {
acpi_os_free(package_data.pointer);
goto end;
}
*battery_status = package_data.pointer;
end:
acpi_os_free(bst_buffer.pointer);
return_ACPI_STATUS(status);
}
/****************************************************************************
*
* FUNCTION: bt_check_device
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_check_device (
BT_CONTEXT *battery)
{
acpi_status status = AE_OK;
BM_DEVICE_STATUS battery_status = BM_STATUS_UNKNOWN;
u32 was_present = FALSE;
BT_BATTERY_INFO *battery_info = NULL;
FUNCTION_TRACE("bt_check_device");
if (!battery) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
was_present = battery->is_present;
/*
* Battery Present?
* ----------------
* Get the device status and check if battery slot is occupied.
*/
status = bm_get_device_status(battery->device_handle, &battery_status);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Unable to get battery status.\n"));
return_ACPI_STATUS(status);
}
if (battery_status & BM_STATUS_BATTERY_PRESENT) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Battery socket occupied.\n"));
battery->is_present = TRUE;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Battery socket not occupied.\n"));
battery->is_present = FALSE;
}
/*
* Battery Appeared?
* -----------------
*/
if (!was_present && battery->is_present) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Battery insertion detected.\n"));
/*
* Units of Power?
* ---------------
* Get the 'units of power', as we'll need this to report
* status information.
*/
status = bt_get_info(battery, &battery_info);
if (ACPI_SUCCESS(status)) {
battery->power_units = (battery_info->power_unit)
? BT_POWER_UNITS_AMPS : BT_POWER_UNITS_WATTS;
acpi_os_free(battery_info);
}
}
/*
* Battery Disappeared?
* --------------------
*/
else if (was_present && !battery->is_present) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Battery removal detected.\n"));
battery->power_units = BT_POWER_UNITS_DEFAULT;
}
return_ACPI_STATUS(status);
}
/*****************************************************************************
*
* FUNCTION: bt_add_device
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_add_device (
BM_HANDLE device_handle,
void **context)
{
acpi_status status = AE_OK;
BM_DEVICE *device = NULL;
BT_CONTEXT *battery = NULL;
FUNCTION_TRACE("bt_add_device");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Adding battery device [%02x].\n", device_handle));
if (!context || *context) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Get information on this device.
*/
status = bm_get_device_info(device_handle, &device);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Allocate a new BT_CONTEXT structure.
*/
battery = acpi_os_callocate(sizeof(BT_CONTEXT));
if (!battery) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
battery->device_handle = device->handle;
battery->acpi_handle = device->acpi_handle;
strncpy(battery->uid, device->id.uid, sizeof(battery->uid));
battery->power_units = BT_POWER_UNITS_DEFAULT;
battery->is_present = FALSE;
/*
* See if battery is really present.
*/
status = bt_check_device(battery);
if (ACPI_FAILURE(status)) {
goto end;
}
status = bt_osl_add_device(battery);
if (ACPI_FAILURE(status)) {
goto end;
}
*context = battery;
bt_print(battery);
end:
if (ACPI_FAILURE(status)) {
acpi_os_free(battery);
}
return_ACPI_STATUS(status);
}
/*****************************************************************************
*
* FUNCTION: bt_remove_device
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_remove_device (
void **context)
{
acpi_status status = AE_OK;
BT_CONTEXT *battery = NULL;
FUNCTION_TRACE("bt_remove_device");
if (!context || !*context) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
battery = (BT_CONTEXT*)*context;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Removing battery device [%02x].\n", battery->device_handle));
bt_osl_remove_device(battery);
acpi_os_free(battery);
*context = NULL;
return_ACPI_STATUS(status);
}
/*****************************************************************************
* External Functions
*****************************************************************************/
/*****************************************************************************
*
* FUNCTION: bt_initialize
*
* PARAMETERS: <none>
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_initialize (void)
{
acpi_status status = AE_OK;
BM_DEVICE_ID criteria;
BM_DRIVER driver;
FUNCTION_TRACE("bt_initialize");
memset(&criteria, 0, sizeof(BM_DEVICE_ID));
memset(&driver, 0, sizeof(BM_DRIVER));
/*
* Register driver for driver method battery devices.
*/
MEMCPY(criteria.hid, BT_HID_CM_BATTERY, sizeof(BT_HID_CM_BATTERY));
driver.notify = &bt_notify;
driver.request = &bt_request;
status = bm_register_driver(&criteria, &driver);
return_ACPI_STATUS(status);
}
/****************************************************************************
*
* FUNCTION: bt_terminate
*
* PARAMETERS: <none>
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_terminate (void)
{
acpi_status status = AE_OK;
BM_DEVICE_ID criteria;
BM_DRIVER driver;
FUNCTION_TRACE("bt_terminate");
memset(&criteria, 0, sizeof(BM_DEVICE_ID));
memset(&driver, 0, sizeof(BM_DRIVER));
/*
* Unregister driver for driver method battery devices.
*/
MEMCPY(criteria.hid, BT_HID_CM_BATTERY, sizeof(BT_HID_CM_BATTERY));
driver.notify = &bt_notify;
driver.request = &bt_request;
status = bm_unregister_driver(&criteria, &driver);
return_ACPI_STATUS(status);
}
/****************************************************************************
*
* FUNCTION: bt_notify
*
* PARAMETERS: <none>
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_notify (
BM_NOTIFY notify_type,
BM_HANDLE device_handle,
void **context)
{
acpi_status status = AE_OK;
FUNCTION_TRACE("bt_notify");
if (!context) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
switch (notify_type) {
case BM_NOTIFY_DEVICE_ADDED:
status = bt_add_device(device_handle, context);
break;
case BM_NOTIFY_DEVICE_REMOVED:
status = bt_remove_device(context);
break;
case BT_NOTIFY_STATUS_CHANGE:
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status change (_BST) event detected.\n"));
status = bt_osl_generate_event(notify_type,
((BT_CONTEXT*)*context));
break;
case BT_NOTIFY_INFORMATION_CHANGE:
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Information change (_BIF) event detected.\n"));
status = bt_check_device((BT_CONTEXT*)*context);
if (ACPI_SUCCESS(status)) {
status = bt_osl_generate_event(notify_type,
((BT_CONTEXT*)*context));
}
break;
default:
status = AE_SUPPORT;
break;
}
return_ACPI_STATUS(status);
}
/****************************************************************************
*
* FUNCTION: bt_request
*
* PARAMETERS:
*
* RETURN:
*
* DESCRIPTION:
*
****************************************************************************/
acpi_status
bt_request (
BM_REQUEST *request,
void *context)
{
acpi_status status = AE_OK;
FUNCTION_TRACE("bt_request");
/*
* Must have a valid request structure and context.
*/
if (!request || !context)
return_ACPI_STATUS(AE_BAD_PARAMETER);
/*
* Handle request:
* ---------------
*/
switch (request->command) {
default:
status = AE_SUPPORT;
break;
}
request->status = status;
return_ACPI_STATUS(status);
}
|