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