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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * PC Speaker beeper driver for Linux
3 *
4 * Copyright (c) 2002 Vojtech Pavlik
5 * Copyright (c) 1992 Orest Zborowski
6 *
7 */
8
9/*
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/input.h>
Dmitry Torokhov59317742005-12-21 00:52:22 -050019#include <linux/platform_device.h>
Arnd Bergmann08604bd2009-06-16 15:31:12 -070020#include <linux/timex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <asm/io.h>
22
23MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24MODULE_DESCRIPTION("PC Speaker beeper driver");
25MODULE_LICENSE("GPL");
Kay Sievers43cc71e2007-08-18 04:40:39 +020026MODULE_ALIAS("platform:pcspkr");
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Ralf Baechle74521c22007-11-02 17:26:06 +000028#if defined(CONFIG_MIPS) || defined(CONFIG_X86)
Thomas Gleixner28318da2007-07-21 17:11:18 +020029/* Use the global PIT lock ! */
30#include <asm/i8253.h>
31#else
Thomas Gleixner5d5a2982007-10-12 23:04:23 +020032#include <asm/8253pit.h>
Thomas Gleixner28318da2007-07-21 17:11:18 +020033static DEFINE_SPINLOCK(i8253_lock);
34#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
37{
38 unsigned int count = 0;
39 unsigned long flags;
40
41 if (type != EV_SND)
42 return -1;
43
44 switch (code) {
45 case SND_BELL: if (value) value = 1000;
46 case SND_TONE: break;
47 default: return -1;
48 }
49
50 if (value > 20 && value < 32767)
51 count = PIT_TICK_RATE / value;
52
Thomas Gleixner28318da2007-07-21 17:11:18 +020053 spin_lock_irqsave(&i8253_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55 if (count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 /* set command for counter 2, 2 byte write */
57 outb_p(0xB6, 0x43);
58 /* select desired HZ */
59 outb_p(count & 0xff, 0x42);
60 outb((count >> 8) & 0xff, 0x42);
Zoltan Devai59bdb432008-11-12 23:05:40 -050061 /* enable counter 2 */
62 outb_p(inb_p(0x61) | 3, 0x61);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 } else {
64 /* disable counter 2 */
65 outb(inb_p(0x61) & 0xFC, 0x61);
66 }
67
Thomas Gleixner28318da2007-07-21 17:11:18 +020068 spin_unlock_irqrestore(&i8253_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70 return 0;
71}
72
Dmitry Torokhov59317742005-12-21 00:52:22 -050073static int __devinit pcspkr_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Dmitry Torokhov59317742005-12-21 00:52:22 -050075 struct input_dev *pcspkr_dev;
76 int err;
77
Dmitry Torokhov76b7cdd2005-09-15 02:01:51 -050078 pcspkr_dev = input_allocate_device();
79 if (!pcspkr_dev)
80 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
Dmitry Torokhov76b7cdd2005-09-15 02:01:51 -050082 pcspkr_dev->name = "PC Speaker";
Dmitry Torokhov1259f2b2005-10-31 01:30:05 -050083 pcspkr_dev->phys = "isa0061/input0";
Dmitry Torokhov76b7cdd2005-09-15 02:01:51 -050084 pcspkr_dev->id.bustype = BUS_ISA;
85 pcspkr_dev->id.vendor = 0x001f;
86 pcspkr_dev->id.product = 0x0001;
87 pcspkr_dev->id.version = 0x0100;
Dmitry Torokhov293e6392007-04-12 01:35:32 -040088 pcspkr_dev->dev.parent = &dev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Jiri Slaby7b19ada2007-10-18 23:40:32 -070090 pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
91 pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
Dmitry Torokhov76b7cdd2005-09-15 02:01:51 -050092 pcspkr_dev->event = pcspkr_event;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Dmitry Torokhov59317742005-12-21 00:52:22 -050094 err = input_register_device(pcspkr_dev);
95 if (err) {
96 input_free_device(pcspkr_dev);
97 return err;
98 }
99
100 platform_set_drvdata(dev, pcspkr_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102 return 0;
103}
104
Dmitry Torokhov59317742005-12-21 00:52:22 -0500105static int __devexit pcspkr_remove(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
Dmitry Torokhov59317742005-12-21 00:52:22 -0500107 struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
108
109 input_unregister_device(pcspkr_dev);
110 platform_set_drvdata(dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 /* turn off the speaker */
112 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
Dmitry Torokhov59317742005-12-21 00:52:22 -0500113
114 return 0;
115}
116
Frans Pop35db7152009-07-12 20:51:32 -0700117static int pcspkr_suspend(struct device *dev)
Dmitry Torokhov59317742005-12-21 00:52:22 -0500118{
119 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
120
121 return 0;
122}
123
124static void pcspkr_shutdown(struct platform_device *dev)
125{
126 /* turn off the speaker */
127 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
128}
129
Frans Pop35db7152009-07-12 20:51:32 -0700130static struct dev_pm_ops pcspkr_pm_ops = {
131 .suspend = pcspkr_suspend,
132};
133
Dmitry Torokhov59317742005-12-21 00:52:22 -0500134static struct platform_driver pcspkr_platform_driver = {
135 .driver = {
136 .name = "pcspkr",
137 .owner = THIS_MODULE,
Frans Pop35db7152009-07-12 20:51:32 -0700138 .pm = &pcspkr_pm_ops,
Dmitry Torokhov59317742005-12-21 00:52:22 -0500139 },
140 .probe = pcspkr_probe,
141 .remove = __devexit_p(pcspkr_remove),
Dmitry Torokhov59317742005-12-21 00:52:22 -0500142 .shutdown = pcspkr_shutdown,
143};
144
145
146static int __init pcspkr_init(void)
147{
Michael Neulinge5c6c8e2006-03-14 00:11:50 -0500148 return platform_driver_register(&pcspkr_platform_driver);
Dmitry Torokhov59317742005-12-21 00:52:22 -0500149}
150
151static void __exit pcspkr_exit(void)
152{
Dmitry Torokhov59317742005-12-21 00:52:22 -0500153 platform_driver_unregister(&pcspkr_platform_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156module_init(pcspkr_init);
157module_exit(pcspkr_exit);