bt_osl.c
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上传日期:2013-02-24
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文件大小:10k
- /******************************************************************************
- *
- * Module Name: bt_osl.c
- * $Revision: 24 $
- *
- *****************************************************************************/
- /*
- * 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
- */
- /*
- * Changes:
- * Brendan Burns <bburns@wso.williams.edu> 2000-11-15
- * - added proc battery interface
- * - parse returned data from _BST and _BIF
- * Andy Grover <andrew.grover@intel.com> 2000-12-8
- * - improved proc interface
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/types.h>
- #include <linux/proc_fs.h>
- #include <acpi.h>
- #include "bt.h"
- MODULE_AUTHOR("Andrew Grover");
- MODULE_DESCRIPTION("ACPI Component Architecture (CA) - Control Method Battery Driver");
- MODULE_LICENSE("GPL");
- #define BT_PROC_ROOT "battery"
- #define BT_PROC_STATUS "status"
- #define BT_PROC_INFO "info"
- extern struct proc_dir_entry *bm_proc_root;
- static struct proc_dir_entry *bt_proc_root = NULL;
- /****************************************************************************
- *
- * FUNCTION: bt_osl_proc_read_info
- *
- ****************************************************************************/
- static int
- bt_osl_proc_read_info (
- char *page,
- char **start,
- off_t off,
- int count,
- int *eof,
- void *context)
- {
- BT_CONTEXT *battery = NULL;
- BT_BATTERY_INFO *battery_info = NULL;
- char *p = page;
- int len = 0;
- if (!context || (off != 0)) {
- goto end;
- }
- battery = (BT_CONTEXT*)context;
- /*
- * Battery Present?
- * ----------------
- */
- if (!battery->is_present) {
- p += sprintf(p, "Present: non");
- goto end;
- }
- else {
- p += sprintf(p, "Present: yesn");
- }
- /*
- * Get Battery Information:
- * ------------------------
- */
- if (ACPI_FAILURE(bt_get_info(battery, &battery_info))) {
- p += sprintf(p, "Error reading battery information (_BIF)n");
- goto end;
- }
- if (battery_info->design_capacity == BT_UNKNOWN) {
- p += sprintf(p, "Design Capacity: unknownn");
- }
- else {
- p += sprintf(p, "Design Capacity: %d %shn",
- (u32)battery_info->design_capacity,
- battery->power_units);
- }
-
- if (battery_info->last_full_capacity == BT_UNKNOWN) {
- p += sprintf(p, "Last Full Capacity: unknownn");
- }
- else {
- p += sprintf(p, "Last Full Capacity: %d %shn",
- (u32)battery_info->last_full_capacity,
- battery->power_units);
- }
- if (battery_info->battery_technology == 0) {
- p += sprintf(p, "Battery Technology: primary (non-rechargeable)n");
- }
- else if (battery_info->battery_technology == 1) {
- p += sprintf(p, "Battery Technology: secondary (rechargeable)n");
- }
- else {
- p += sprintf(p, "Battery Technology: unknownn");
- }
- if (battery_info->design_voltage == BT_UNKNOWN) {
- p += sprintf(p, "Design Voltage: unknownn");
- }
- else {
- p += sprintf(p, "Design Voltage: %d mVn",
- (u32)battery_info->design_voltage);
- }
-
- p += sprintf(p, "Design Capacity Warning: %d %shn",
- (u32)battery_info->design_capacity_warning,
- battery->power_units);
- p += sprintf(p, "Design Capacity Low: %d %shn",
- (u32)battery_info->design_capacity_low,
- battery->power_units);
- p += sprintf(p, "Capacity Granularity 1: %d %shn",
- (u32)battery_info->battery_capacity_granularity_1,
- battery->power_units);
- p += sprintf(p, "Capacity Granularity 2: %d %shn",
- (u32)battery_info->battery_capacity_granularity_2,
- battery->power_units);
- p += sprintf(p, "Model Number: %sn",
- battery_info->model_number);
- p += sprintf(p, "Serial Number: %sn",
- battery_info->serial_number);
- p += sprintf(p, "Battery Type: %sn",
- battery_info->battery_type);
- p += sprintf(p, "OEM Info: %sn",
- battery_info->oem_info);
-
- end:
- len = (p - page);
- if (len <= off+count) *eof = 1;
- *start = page + off;
- len -= off;
- if (len>count) len = count;
- if (len<0) len = 0;
- acpi_os_free(battery_info);
- return(len);
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_proc_read_status
- *
- ****************************************************************************/
- static int
- bt_osl_proc_read_status (
- char *page,
- char **start,
- off_t off,
- int count,
- int *eof,
- void *context)
- {
- BT_CONTEXT *battery = NULL;
- BT_BATTERY_STATUS *battery_status = NULL;
- char *p = page;
- int len = 0;
- if (!context || (off != 0)) {
- goto end;
- }
- battery = (BT_CONTEXT*)context;
- /*
- * Battery Present?
- * ----------------
- */
- if (!battery->is_present) {
- p += sprintf(p, "Present: non");
- goto end;
- }
- else {
- p += sprintf(p, "Present: yesn");
- }
- /*
- * Get Battery Status:
- * -------------------
- */
- if (ACPI_FAILURE(bt_get_status(battery, &battery_status))) {
- p += sprintf(p, "Error reading battery status (_BST)n");
- goto end;
- }
- /*
- * Store Data:
- * -----------
- */
- if (!battery_status->state) {
- p += sprintf(p, "State: okn");
- }
- else {
- if (battery_status->state & 0x1)
- p += sprintf(p, "State: dischargingn");
- if (battery_status->state & 0x2)
- p += sprintf(p, "State: chargingn");
- if (battery_status->state & 0x4)
- p += sprintf(p, "State: critically lown");
- }
- if (battery_status->present_rate == BT_UNKNOWN) {
- p += sprintf(p, "Present Rate: unknownn");
- }
- else {
- p += sprintf(p, "Present Rate: %d %sn",
- (u32)battery_status->present_rate,
- battery->power_units);
- }
- if (battery_status->remaining_capacity == BT_UNKNOWN) {
- p += sprintf(p, "Remaining Capacity: unknownn");
- }
- else {
- p += sprintf(p, "Remaining Capacity: %d %shn",
- (u32)battery_status->remaining_capacity,
- battery->power_units);
- }
- if (battery_status->present_voltage == BT_UNKNOWN) {
- p += sprintf(p, "Battery Voltage: unknownn");
- }
- else {
- p += sprintf(p, "Battery Voltage: %d mVn",
- (u32)battery_status->present_voltage);
- }
- end:
- len = (p - page);
- if (len <= off+count) *eof = 1;
- *start = page + off;
- len -= off;
- if (len>count) len = count;
- if (len<0) len = 0;
- acpi_os_free(battery_status);
- return(len);
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_add_device
- *
- ****************************************************************************/
- acpi_status
- bt_osl_add_device(
- BT_CONTEXT *battery)
- {
- struct proc_dir_entry *proc_entry = NULL;
- if (!battery) {
- return(AE_BAD_PARAMETER);
- }
- if (battery->is_present) {
- printk("ACPI: Battery socket found, battery presentn");
- }
- else {
- printk("ACPI: Battery socket found, battery absentn");
- }
- proc_entry = proc_mkdir(battery->uid, bt_proc_root);
- if (!proc_entry) {
- return(AE_ERROR);
- }
- create_proc_read_entry(BT_PROC_STATUS, S_IFREG | S_IRUGO,
- proc_entry, bt_osl_proc_read_status, (void*)battery);
- create_proc_read_entry(BT_PROC_INFO, S_IFREG | S_IRUGO,
- proc_entry, bt_osl_proc_read_info, (void*)battery);
- return(AE_OK);
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_remove_device
- *
- ****************************************************************************/
- acpi_status
- bt_osl_remove_device (
- BT_CONTEXT *battery)
- {
- char proc_entry[64];
- if (!battery) {
- return(AE_BAD_PARAMETER);
- }
- sprintf(proc_entry, "%s/%s", battery->uid, BT_PROC_INFO);
- remove_proc_entry(proc_entry, bt_proc_root);
- sprintf(proc_entry, "%s/%s", battery->uid, BT_PROC_STATUS);
- remove_proc_entry(proc_entry, bt_proc_root);
- sprintf(proc_entry, "%s", battery->uid);
- remove_proc_entry(proc_entry, bt_proc_root);
- return(AE_OK);
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_generate_event
- *
- ****************************************************************************/
- acpi_status
- bt_osl_generate_event (
- u32 event,
- BT_CONTEXT *battery)
- {
- acpi_status status = AE_OK;
- if (!battery) {
- return(AE_BAD_PARAMETER);
- }
- switch (event) {
- case BT_NOTIFY_STATUS_CHANGE:
- case BT_NOTIFY_INFORMATION_CHANGE:
- status = bm_osl_generate_event(battery->device_handle,
- BT_PROC_ROOT, battery->uid, event, 0);
- break;
- default:
- return(AE_BAD_PARAMETER);
- break;
- }
- return(status);
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_init
- *
- * PARAMETERS: <none>
- *
- * RETURN: 0: Success
- *
- * DESCRIPTION: Module initialization.
- *
- ****************************************************************************/
- static int __init
- bt_osl_init (void)
- {
- acpi_status status = AE_OK;
- /* abort if no busmgr */
- if (!bm_proc_root)
- return -ENODEV;
- bt_proc_root = proc_mkdir(BT_PROC_ROOT, bm_proc_root);
- if (!bt_proc_root) {
- status = AE_ERROR;
- }
- else {
- status = bt_initialize();
- if (ACPI_FAILURE(status)) {
- remove_proc_entry(BT_PROC_ROOT, bm_proc_root);
- }
- }
- return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
- }
- /****************************************************************************
- *
- * FUNCTION: bt_osl_cleanup
- *
- * PARAMETERS: <none>
- *
- * RETURN: <none>
- *
- * DESCRIPTION: Module cleanup.
- *
- ****************************************************************************/
- static void __exit
- bt_osl_cleanup (void)
- {
- bt_terminate();
- if (bt_proc_root) {
- remove_proc_entry(BT_PROC_ROOT, bm_proc_root);
- }
- return;
- }
- module_init(bt_osl_init);
- module_exit(bt_osl_cleanup);