/****************************************************************************** * * 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 #include #include #include #include #include #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: * * 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: * * RETURN: * * 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);