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