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519 mauro 1 
/*
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 * $Id: speaker.c,v 1.1 2004-03-22 14:48:15 mauro Exp $
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 *
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 *  Copyright (c) 1999-2001 Vojtech Pavlik
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 */
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/*
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 *  Input driver event debug module - dumps all events into syslog
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 */
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/*
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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 */
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#include <linuxcomp.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/init.h>
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#include <linux/device.h>
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//#define DEBUG_SPK
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Input driver event debug module");
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MODULE_LICENSE("GPL");
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static char speaker_name[] = "speaker";
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static struct input_handler speaker_handler;
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/*
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 * Making beeps and bells.
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 */
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void spk_nosound(unsigned long ignored)
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{
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        struct list_head * node;
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        list_for_each(node,&speaker_handler.h_list) {
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                struct input_handle *handle = to_handle_h(node);
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                if (test_bit(EV_SND, handle->dev->evbit)) {
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                        if (test_bit(SND_TONE, handle->dev->sndbit))
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                                input_event(handle->dev, EV_SND, SND_TONE, 0);
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                        if (test_bit(SND_BELL, handle->dev->sndbit))
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                                input_event(handle->dev, EV_SND, SND_BELL, 0);
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                }
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        }
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}
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static struct timer_list spk_mksound_timer =
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                TIMER_INITIALIZER(spk_nosound, 0, 0);
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void spk_mksound(unsigned int hz, unsigned int ticks)
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{
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        struct list_head * node;
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        del_timer(&spk_mksound_timer);
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        if (hz) {
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                list_for_each_prev(node,&speaker_handler.h_list) {
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                        struct input_handle *handle = to_handle_h(node);
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                        if (test_bit(EV_SND, handle->dev->evbit)) {
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                                if (test_bit(SND_TONE, handle->dev->sndbit)) {
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                                        input_event(handle->dev, EV_SND, SND_TONE, hz);
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                                        break;
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                                }
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                                if (test_bit(SND_BELL, handle->dev->sndbit)) {
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                                        input_event(handle->dev, EV_SND, SND_BELL, 1);
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                                        break;
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                                }
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                        }
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                }
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                if (ticks)
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                        mod_timer(&spk_mksound_timer, jiffies26 + ticks);
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        } else
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                spk_nosound(0);
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}
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static void speaker_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
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{
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        if (type != EV_SND)
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                return;
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#ifdef DEBUG_SPK
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        printk(KERN_DEBUG "speaker.c: Event. Dev: %s, Type: %d, Code: %d, Value: %d\n", handle->dev->phys, type, code, value);
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#endif
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}
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static struct input_handle *speaker_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
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{
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        struct input_handle *handle;
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        if (!test_bit(EV_SND, dev->evbit))
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                return NULL;
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        if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
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                return NULL;
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        memset(handle, 0, sizeof(struct input_handle));
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        handle->dev = dev;
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        handle->handler = handler;
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        handle->name = speaker_name;
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        input_open_device(handle);
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#ifdef DEBUG_SPK
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        printk(KERN_DEBUG "speaker.c: Connected device: \"%s\", %s\n", dev->name, dev->phys);
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#endif
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        return handle;
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}
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static void speaker_disconnect(struct input_handle *handle)
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{
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#ifdef DEBUG_SPK
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        printk(KERN_DEBUG "speaker.c: Disconnected device: %s\n", handle->dev->phys);
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#endif 
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        input_close_device(handle);
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        kfree(handle);
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}
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static struct input_device_id speaker_ids[] = {
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        { .driver_info = 1 },   // Matches all devices
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        { },                    // Terminating zero entry
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};
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/*static struct input_device_id speaker_ids[] = {
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        {
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                .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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                .evbit = { BIT(EV_SND) },
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        },     
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        { },    // Terminating entry
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};*/
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MODULE_DEVICE_TABLE(input, speaker_ids);
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static struct input_handler speaker_handler = {
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        .event =        speaker_event,
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        .connect =      speaker_connect,
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        .disconnect =   speaker_disconnect,
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        .name =         "speaker",
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        .id_table =     speaker_ids,
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};
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int __init speaker_init(void)
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{
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        input_register_handler(&speaker_handler);
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        return 0;
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}
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void __exit speaker_exit(void)
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{
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        input_unregister_handler(&speaker_handler);
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}
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module_init(speaker_init);
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module_exit(speaker_exit);