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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <asm/io.h>
21
22MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
23MODULE_DESCRIPTION("PC Speaker beeper driver");
24MODULE_LICENSE("GPL");
Kay Sievers43cc71e2007-08-18 04:40:39 +020025MODULE_ALIAS("platform:pcspkr");
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Ralf Baechle74521c22007-11-02 17:26:06 +000027#if defined(CONFIG_MIPS) || defined(CONFIG_X86)
Thomas Gleixner28318da2007-07-21 17:11:18 +020028/* Use the global PIT lock ! */
29#include <asm/i8253.h>
30#else
Thomas Gleixner5d5a2982007-10-12 23:04:23 +020031#include <asm/8253pit.h>
Thomas Gleixner28318da2007-07-21 17:11:18 +020032static DEFINE_SPINLOCK(i8253_lock);
33#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
36{
37 unsigned int count = 0;
38 unsigned long flags;
39
40 if (type != EV_SND)
41 return -1;
42
43 switch (code) {
44 case SND_BELL: if (value) value = 1000;
45 case SND_TONE: break;
46 default: return -1;
47 }
48
49 if (value > 20 && value < 32767)
50 count = PIT_TICK_RATE / value;
51
Thomas Gleixner28318da2007-07-21 17:11:18 +020052 spin_lock_irqsave(&i8253_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54 if (count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 /* set command for counter 2, 2 byte write */
56 outb_p(0xB6, 0x43);
57 /* select desired HZ */
58 outb_p(count & 0xff, 0x42);
59 outb((count >> 8) & 0xff, 0x42);
Zoltan Devai59bdb432008-11-12 23:05:40 -050060 /* enable counter 2 */
61 outb_p(inb_p(0x61) | 3, 0x61);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 } else {
63 /* disable counter 2 */
64 outb(inb_p(0x61) & 0xFC, 0x61);
65 }
66
Thomas Gleixner28318da2007-07-21 17:11:18 +020067 spin_unlock_irqrestore(&i8253_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69 return 0;
70}
71
Dmitry Torokhov59317742005-12-21 00:52:22 -050072static int __devinit pcspkr_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
Dmitry Torokhov59317742005-12-21 00:52:22 -050074 struct input_dev *pcspkr_dev;
75 int err;
76
Dmitry Torokhov76b7cddf2005-09-15 02:01:51 -050077 pcspkr_dev = input_allocate_device();
78 if (!pcspkr_dev)
79 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Dmitry Torokhov76b7cddf2005-09-15 02:01:51 -050081 pcspkr_dev->name = "PC Speaker";
Dmitry Torokhov1259f2b2005-10-31 01:30:05 -050082 pcspkr_dev->phys = "isa0061/input0";
Dmitry Torokhov76b7cddf2005-09-15 02:01:51 -050083 pcspkr_dev->id.bustype = BUS_ISA;
84 pcspkr_dev->id.vendor = 0x001f;
85 pcspkr_dev->id.product = 0x0001;
86 pcspkr_dev->id.version = 0x0100;
Dmitry Torokhov293e6392007-04-12 01:35:32 -040087 pcspkr_dev->dev.parent = &dev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Jiri Slaby7b19ada2007-10-18 23:40:32 -070089 pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
90 pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
Dmitry Torokhov76b7cddf2005-09-15 02:01:51 -050091 pcspkr_dev->event = pcspkr_event;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Dmitry Torokhov59317742005-12-21 00:52:22 -050093 err = input_register_device(pcspkr_dev);
94 if (err) {
95 input_free_device(pcspkr_dev);
96 return err;
97 }
98
99 platform_set_drvdata(dev, pcspkr_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101 return 0;
102}
103
Dmitry Torokhov59317742005-12-21 00:52:22 -0500104static int __devexit pcspkr_remove(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105{
Dmitry Torokhov59317742005-12-21 00:52:22 -0500106 struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
107
108 input_unregister_device(pcspkr_dev);
109 platform_set_drvdata(dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 /* turn off the speaker */
111 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
Dmitry Torokhov59317742005-12-21 00:52:22 -0500112
113 return 0;
114}
115
116static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
117{
118 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
119
120 return 0;
121}
122
123static void pcspkr_shutdown(struct platform_device *dev)
124{
125 /* turn off the speaker */
126 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
127}
128
129static struct platform_driver pcspkr_platform_driver = {
130 .driver = {
131 .name = "pcspkr",
132 .owner = THIS_MODULE,
133 },
134 .probe = pcspkr_probe,
135 .remove = __devexit_p(pcspkr_remove),
136 .suspend = pcspkr_suspend,
137 .shutdown = pcspkr_shutdown,
138};
139
140
141static int __init pcspkr_init(void)
142{
Michael Neulinge5c6c8e2006-03-14 00:11:50 -0500143 return platform_driver_register(&pcspkr_platform_driver);
Dmitry Torokhov59317742005-12-21 00:52:22 -0500144}
145
146static void __exit pcspkr_exit(void)
147{
Dmitry Torokhov59317742005-12-21 00:52:22 -0500148 platform_driver_unregister(&pcspkr_platform_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149}
150
151module_init(pcspkr_init);
152module_exit(pcspkr_exit);