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/******************************************************************************
*
* Module Name: bn_osl.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 <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <acpi.h>
#include "bn.h"
MODULE_AUTHOR("Andrew Grover");
MODULE_DESCRIPTION("ACPI Component Architecture (CA) - Button Driver");
MODULE_LICENSE("GPL");
#define BN_PROC_ROOT "button"
#define BN_PROC_POWER_BUTTON "power"
#define BN_PROC_SLEEP_BUTTON "sleep"
#define BN_PROC_LID_SWITCH "lid"
extern struct proc_dir_entry *bm_proc_root;
static struct proc_dir_entry *bn_proc_root = NULL;
#define BN_TYPE_UNKNOWN 0
#define BN_TYPE_FIXED 1
#define BN_TYPE_GENERIC 2
static int bn_power_button = BN_TYPE_UNKNOWN;
static int bn_sleep_button = BN_TYPE_UNKNOWN;
static int bn_lid_switch = BN_TYPE_UNKNOWN;
/****************************************************************************
*
* FUNCTION: bn_osl_add_device
*
****************************************************************************/
acpi_status
bn_osl_add_device(
BN_CONTEXT *button)
{
acpi_status status = AE_OK;
if (!button) {
return(AE_BAD_PARAMETER);
}
switch (button->type) {
case BN_TYPE_POWER_BUTTON_FIXED:
bn_power_button = BN_TYPE_FIXED;
printk(KERN_INFO "ACPI: Power Button (FF) found\n");
if (!proc_mkdir(BN_PROC_POWER_BUTTON, bn_proc_root)) {
status = AE_ERROR;
}
break;
case BN_TYPE_POWER_BUTTON:
/*
* Avoid creating multiple /proc entries when (buggy) ACPI
* BIOS tables erroneously list both fixed- and generic-
* feature buttons. Note that fixed-feature buttons are
* always enumerated first (and there can only be one) so
* we only need to check here.
*/
switch (bn_power_button) {
case BN_TYPE_GENERIC:
printk(KERN_WARNING "ACPI: Multiple generic-space power buttons detected, using first\n");
break;
case BN_TYPE_FIXED:
printk(KERN_WARNING "ACPI: Multiple power buttons detected, ignoring fixed-feature\n");
default:
printk(KERN_INFO "ACPI: Power Button (CM) found\n");
bn_power_button = BN_TYPE_GENERIC;
if (!proc_mkdir(BN_PROC_POWER_BUTTON, bn_proc_root)) {
status = AE_ERROR;
}
break;
}
break;
case BN_TYPE_SLEEP_BUTTON_FIXED:
bn_sleep_button = BN_TYPE_FIXED;
printk(KERN_INFO "ACPI: Sleep Button (FF) found\n");
if (!proc_mkdir(BN_PROC_SLEEP_BUTTON, bn_proc_root)) {
status = AE_ERROR;
}
break;
case BN_TYPE_SLEEP_BUTTON:
/*
* Avoid creating multiple /proc entries when (buggy) ACPI
* BIOS tables erroneously list both fixed- and generic-
* feature buttons. Note that fixed-feature buttons are
* always enumerated first (and there can only be one) so
* we only need to check here.
*/
switch (bn_sleep_button) {
case BN_TYPE_GENERIC:
printk(KERN_WARNING "ACPI: Multiple generic-space sleep buttons detected, using first\n");
break;
case BN_TYPE_FIXED:
printk(KERN_WARNING "ACPI: Multiple sleep buttons detected, ignoring fixed-feature\n");
default:
bn_sleep_button = BN_TYPE_GENERIC;
printk(KERN_INFO "ACPI: Sleep Button (CM) found\n");
if (!proc_mkdir(BN_PROC_SLEEP_BUTTON, bn_proc_root)) {
status = AE_ERROR;
}
break;
}
break;
case BN_TYPE_LID_SWITCH:
if (bn_lid_switch) {
printk(KERN_WARNING "ACPI: Multiple generic-space lid switches detected, using first\n");
break;
}
bn_lid_switch = BN_TYPE_GENERIC;
printk(KERN_INFO "ACPI: Lid Switch (CM) found\n");
if (!proc_mkdir(BN_PROC_LID_SWITCH, bn_proc_root)) {
status = AE_ERROR;
}
break;
}
return(status);
}
/****************************************************************************
*
* FUNCTION: bn_osl_remove_device
*
****************************************************************************/
acpi_status
bn_osl_remove_device (
BN_CONTEXT *button)
{
if (!button) {
return(AE_BAD_PARAMETER);
}
switch (button->type) {
case BN_TYPE_POWER_BUTTON:
case BN_TYPE_POWER_BUTTON_FIXED:
remove_proc_entry(BN_PROC_POWER_BUTTON, bn_proc_root);
break;
case BN_TYPE_SLEEP_BUTTON:
case BN_TYPE_SLEEP_BUTTON_FIXED:
remove_proc_entry(BN_PROC_SLEEP_BUTTON, bn_proc_root);
break;
case BN_TYPE_LID_SWITCH:
remove_proc_entry(BN_PROC_LID_SWITCH, bn_proc_root);
break;
}
return(AE_OK);
}
/****************************************************************************
*
* FUNCTION: bn_osl_generate_event
*
****************************************************************************/
acpi_status
bn_osl_generate_event (
u32 event,
BN_CONTEXT *button)
{
acpi_status status = AE_OK;
if (!button) {
return(AE_BAD_PARAMETER);
}
switch (event) {
case BN_NOTIFY_STATUS_CHANGE:
switch(button->type) {
case BN_TYPE_POWER_BUTTON:
case BN_TYPE_POWER_BUTTON_FIXED:
status = bm_osl_generate_event(button->device_handle,
BN_PROC_ROOT, BN_PROC_POWER_BUTTON, event, 0);
break;
case BN_TYPE_SLEEP_BUTTON:
case BN_TYPE_SLEEP_BUTTON_FIXED:
status = bm_osl_generate_event(button->device_handle,
BN_PROC_ROOT, BN_PROC_SLEEP_BUTTON, event, 0);
break;
case BN_TYPE_LID_SWITCH:
status = bm_osl_generate_event(button->device_handle,
BN_PROC_ROOT, BN_PROC_LID_SWITCH, event, 0);
break;
default:
status = AE_SUPPORT;
break;
}
break;
default:
return(AE_BAD_PARAMETER);
break;
}
return(status);
}
/****************************************************************************
*
* FUNCTION: bn_osl_init
*
* PARAMETERS: <none>
*
* RETURN: 0: Success
*
* DESCRIPTION: Module initialization.
*
****************************************************************************/
static int __init
bn_osl_init (void)
{
acpi_status status = AE_OK;
/* abort if no busmgr */
if (!bm_proc_root)
return -ENODEV;
bn_proc_root = proc_mkdir(BN_PROC_ROOT, bm_proc_root);
if (!bn_proc_root) {
status = AE_ERROR;
}
else {
status = bn_initialize();
if (ACPI_FAILURE(status)) {
remove_proc_entry(BN_PROC_ROOT, bm_proc_root);
}
}
return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
}
/****************************************************************************
*
* FUNCTION: bn_osl_cleanup
*
* PARAMETERS: <none>
*
* RETURN: <none>
*
* DESCRIPTION: Module cleanup.
*
****************************************************************************/
static void __exit
bn_osl_cleanup (void)
{
bn_terminate();
if (bn_proc_root) {
remove_proc_entry(BN_PROC_ROOT, bm_proc_root);
}
return;
}
module_init(bn_osl_init);
module_exit(bn_osl_cleanup);
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