Input: pcspkr - register with driver core as a platfrom device
[linux-2.6.git] / drivers / input / misc / pcspkr.c
1 /*
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>
19 #include <linux/platform_device.h>
20 #include <asm/8253pit.h>
21 #include <asm/io.h>
22
23 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24 MODULE_DESCRIPTION("PC Speaker beeper driver");
25 MODULE_LICENSE("GPL");
26
27 static struct platform_device *pcspkr_platform_device;
28 static DEFINE_SPINLOCK(i8253_beep_lock);
29
30 static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
31 {
32         unsigned int count = 0;
33         unsigned long flags;
34
35         if (type != EV_SND)
36                 return -1;
37
38         switch (code) {
39                 case SND_BELL: if (value) value = 1000;
40                 case SND_TONE: break;
41                 default: return -1;
42         }
43
44         if (value > 20 && value < 32767)
45                 count = PIT_TICK_RATE / value;
46
47         spin_lock_irqsave(&i8253_beep_lock, flags);
48
49         if (count) {
50                 /* enable counter 2 */
51                 outb_p(inb_p(0x61) | 3, 0x61);
52                 /* set command for counter 2, 2 byte write */
53                 outb_p(0xB6, 0x43);
54                 /* select desired HZ */
55                 outb_p(count & 0xff, 0x42);
56                 outb((count >> 8) & 0xff, 0x42);
57         } else {
58                 /* disable counter 2 */
59                 outb(inb_p(0x61) & 0xFC, 0x61);
60         }
61
62         spin_unlock_irqrestore(&i8253_beep_lock, flags);
63
64         return 0;
65 }
66
67 static int __devinit pcspkr_probe(struct platform_device *dev)
68 {
69         struct input_dev *pcspkr_dev;
70         int err;
71
72         pcspkr_dev = input_allocate_device();
73         if (!pcspkr_dev)
74                 return -ENOMEM;
75
76         pcspkr_dev->name = "PC Speaker";
77         pcspkr_dev->phys = "isa0061/input0";
78         pcspkr_dev->id.bustype = BUS_ISA;
79         pcspkr_dev->id.vendor = 0x001f;
80         pcspkr_dev->id.product = 0x0001;
81         pcspkr_dev->id.version = 0x0100;
82         pcspkr_dev->cdev.dev = &dev->dev;
83
84         pcspkr_dev->evbit[0] = BIT(EV_SND);
85         pcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
86         pcspkr_dev->event = pcspkr_event;
87
88         err = input_register_device(pcspkr_dev);
89         if (err) {
90                 input_free_device(pcspkr_dev);
91                 return err;
92         }
93
94         platform_set_drvdata(dev, pcspkr_dev);
95
96         return 0;
97 }
98
99 static int __devexit pcspkr_remove(struct platform_device *dev)
100 {
101         struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
102
103         input_unregister_device(pcspkr_dev);
104         platform_set_drvdata(dev, NULL);
105         /* turn off the speaker */
106         pcspkr_event(NULL, EV_SND, SND_BELL, 0);
107
108         return 0;
109 }
110
111 static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
112 {
113         pcspkr_event(NULL, EV_SND, SND_BELL, 0);
114
115         return 0;
116 }
117
118 static void pcspkr_shutdown(struct platform_device *dev)
119 {
120         /* turn off the speaker */
121         pcspkr_event(NULL, EV_SND, SND_BELL, 0);
122 }
123
124 static struct platform_driver pcspkr_platform_driver = {
125         .driver         = {
126                 .name   = "pcspkr",
127                 .owner  = THIS_MODULE,
128         },
129         .probe          = pcspkr_probe,
130         .remove         = __devexit_p(pcspkr_remove),
131         .suspend        = pcspkr_suspend,
132         .shutdown       = pcspkr_shutdown,
133 };
134
135
136 static int __init pcspkr_init(void)
137 {
138         int err;
139
140         err = platform_driver_register(&pcspkr_platform_driver);
141         if (err)
142                 return err;
143
144         pcspkr_platform_device = platform_device_alloc("pcspkr", -1);
145         if (!pcspkr_platform_device) {
146                 err = -ENOMEM;
147                 goto err_unregister_driver;
148         }
149
150         err = platform_device_add(pcspkr_platform_device);
151         if (err)
152                 goto err_free_device;
153
154         return 0;
155
156  err_free_device:
157         platform_device_put(pcspkr_platform_device);
158  err_unregister_driver:
159         platform_driver_unregister(&pcspkr_platform_driver);
160
161         return err;
162 }
163
164 static void __exit pcspkr_exit(void)
165 {
166         platform_device_unregister(pcspkr_platform_device);
167         platform_driver_unregister(&pcspkr_platform_driver);
168 }
169
170 module_init(pcspkr_init);
171 module_exit(pcspkr_exit);