1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* PC-Speaker driver for Linux
*
* Copyright (C) 1997-2001 David Woodhouse
* Copyright (C) 2001-2008 Stas Sergeev
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <asm/bitops.h>
#include "pcsp_input.h"
#include "pcsp.h"
MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>");
MODULE_DESCRIPTION("PC-Speaker driver");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}");
MODULE_ALIAS("platform:pcspkr");
static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
static bool enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */
static bool nopcm; /* Disable PCM capability of the driver */
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
module_param(enable, bool, 0444);
MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
module_param(nopcm, bool, 0444);
MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");
struct snd_pcsp pcsp_chip;
static int snd_pcsp_create(struct snd_card *card)
{
static struct snd_device_ops ops = { };
struct timespec tp;
int err;
int div, min_div, order;
hrtimer_get_res(CLOCK_MONOTONIC, &tp);
if (!nopcm) {
if (tp.tv_sec || tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
"(%linS)\n", tp.tv_nsec);
printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
"enabled.\n");
printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
nopcm = 1;
}
}
if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
min_div = MIN_DIV;
else
min_div = MAX_DIV;
#if PCSP_DEBUG
printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
loops_per_jiffy, min_div, tp.tv_nsec);
#endif
div = MAX_DIV / min_div;
order = fls(div) - 1;
pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
pcsp_chip.playback_ptr = 0;
pcsp_chip.period_ptr = 0;
atomic_set(&pcsp_chip.timer_active, 0);
pcsp_chip.enable = 1;
pcsp_chip.pcspkr = 1;
spin_lock_init(&pcsp_chip.substream_lock);
pcsp_chip.card = card;
pcsp_chip.port = 0x61;
pcsp_chip.irq = -1;
pcsp_chip.dma = -1;
/* Register device */
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
if (err < 0)
return err;
return 0;
}
static int snd_card_pcsp_probe(int devnum, struct device *dev)
{
struct snd_card *card;
int err;
if (devnum != 0)
return -EINVAL;
hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
pcsp_chip.timer.function = pcsp_do_timer;
err = snd_card_create(index, id, THIS_MODULE, 0, &card);
if (err < 0)
return err;
err = snd_pcsp_create(card);
if (err < 0) {
snd_card_free(card);
return err;
}
if (!nopcm) {
err = snd_pcsp_new_pcm(&pcsp_chip);
if (err < 0) {
snd_card_free(card);
return err;
}
}
err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
if (err < 0) {
snd_card_free(card);
return err;
}
snd_card_set_dev(pcsp_chip.card, dev);
strcpy(card->driver, "PC-Speaker");
strcpy(card->shortname, "pcsp");
sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
pcsp_chip.port);
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return err;
}
return 0;
}
static int alsa_card_pcsp_init(struct device *dev)
{
int err;
err = snd_card_pcsp_probe(0, dev);
if (err) {
printk(KERN_ERR "PC-Speaker initialization failed.\n");
return err;
}
#ifdef CONFIG_DEBUG_PAGEALLOC
/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
"which may make the sound noisy.\n");
#endif
return 0;
}
static void alsa_card_pcsp_exit(struct snd_pcsp *chip)
{
snd_card_free(chip->card);
}
static int pcsp_probe(struct platform_device *dev)
{
int err;
err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
if (err < 0)
return err;
err = alsa_card_pcsp_init(&dev->dev);
if (err < 0) {
pcspkr_input_remove(pcsp_chip.input_dev);
return err;
}
platform_set_drvdata(dev, &pcsp_chip);
return 0;
}
static int pcsp_remove(struct platform_device *dev)
{
struct snd_pcsp *chip = platform_get_drvdata(dev);
pcspkr_input_remove(chip->input_dev);
alsa_card_pcsp_exit(chip);
return 0;
}
static void pcsp_stop_beep(struct snd_pcsp *chip)
{
pcsp_sync_stop(chip);
pcspkr_stop_sound();
}
#ifdef CONFIG_PM_SLEEP
static int pcsp_suspend(struct device *dev)
{
struct snd_pcsp *chip = dev_get_drvdata(dev);
pcsp_stop_beep(chip);
snd_pcm_suspend_all(chip->pcm);
return 0;
}
static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
#define PCSP_PM_OPS &pcsp_pm
#else
#define PCSP_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static void pcsp_shutdown(struct platform_device *dev)
{
struct snd_pcsp *chip = platform_get_drvdata(dev);
pcsp_stop_beep(chip);
}
static struct platform_driver pcsp_platform_driver = {
.driver = {
.name = "pcspkr",
.owner = THIS_MODULE,
.pm = PCSP_PM_OPS,
},
.probe = pcsp_probe,
.remove = pcsp_remove,
.shutdown = pcsp_shutdown,
};
static int __init pcsp_init(void)
{
if (!enable)
return -ENODEV;
return platform_driver_register(&pcsp_platform_driver);
}
static void __exit pcsp_exit(void)
{
platform_driver_unregister(&pcsp_platform_driver);
}
module_init(pcsp_init);
module_exit(pcsp_exit);
|
