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8#include <linux/init.h>
9#include <linux/module.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 <linux/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 bool enable = SNDRV_DEFAULT_ENABLE1;
29static bool nopcm;
30
31module_param(index, int, 0444);
32MODULE_PARM_DESC(index, "Index value for pcsp soundcard.");
33module_param(id, charp, 0444);
34MODULE_PARM_DESC(id, "ID string for pcsp soundcard.");
35module_param(enable, bool, 0444);
36MODULE_PARM_DESC(enable, "Enable PC-Speaker sound.");
37module_param(nopcm, bool, 0444);
38MODULE_PARM_DESC(nopcm, "Disable PC-Speaker PCM sound. Only beeps remain.");
39
40struct snd_pcsp pcsp_chip;
41
42static int snd_pcsp_create(struct snd_card *card)
43{
44 static struct snd_device_ops ops = { };
45 unsigned int resolution = hrtimer_resolution;
46 int err, 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
86
87 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
88 if (err < 0)
89 return err;
90
91 return 0;
92}
93
94static int snd_card_pcsp_probe(int devnum, struct device *dev)
95{
96 struct snd_card *card;
97 int err;
98
99 if (devnum != 0)
100 return -EINVAL;
101
102 hrtimer_init(&pcsp_chip.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
103 pcsp_chip.timer.function = pcsp_do_timer;
104
105 err = snd_card_new(dev, index, id, THIS_MODULE, 0, &card);
106 if (err < 0)
107 return err;
108
109 err = snd_pcsp_create(card);
110 if (err < 0) {
111 snd_card_free(card);
112 return err;
113 }
114 if (!nopcm) {
115 err = snd_pcsp_new_pcm(&pcsp_chip);
116 if (err < 0) {
117 snd_card_free(card);
118 return err;
119 }
120 }
121 err = snd_pcsp_new_mixer(&pcsp_chip, nopcm);
122 if (err < 0) {
123 snd_card_free(card);
124 return err;
125 }
126
127 strcpy(card->driver, "PC-Speaker");
128 strcpy(card->shortname, "pcsp");
129 sprintf(card->longname, "Internal PC-Speaker at port 0x%x",
130 pcsp_chip.port);
131
132 err = snd_card_register(card);
133 if (err < 0) {
134 snd_card_free(card);
135 return err;
136 }
137
138 return 0;
139}
140
141static int alsa_card_pcsp_init(struct device *dev)
142{
143 int err;
144
145 err = snd_card_pcsp_probe(0, dev);
146 if (err) {
147 printk(KERN_ERR "PC-Speaker initialization failed.\n");
148 return err;
149 }
150
151#ifdef CONFIG_DEBUG_PAGEALLOC
152
153 printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
154 "which may make the sound noisy.\n");
155#endif
156
157 return 0;
158}
159
160static void alsa_card_pcsp_exit(struct snd_pcsp *chip)
161{
162 snd_card_free(chip->card);
163}
164
165static int pcsp_probe(struct platform_device *dev)
166{
167 int err;
168
169 err = pcspkr_input_init(&pcsp_chip.input_dev, &dev->dev);
170 if (err < 0)
171 return err;
172
173 err = alsa_card_pcsp_init(&dev->dev);
174 if (err < 0) {
175 pcspkr_input_remove(pcsp_chip.input_dev);
176 return err;
177 }
178
179 platform_set_drvdata(dev, &pcsp_chip);
180 return 0;
181}
182
183static int pcsp_remove(struct platform_device *dev)
184{
185 struct snd_pcsp *chip = platform_get_drvdata(dev);
186 pcspkr_input_remove(chip->input_dev);
187 alsa_card_pcsp_exit(chip);
188 return 0;
189}
190
191static void pcsp_stop_beep(struct snd_pcsp *chip)
192{
193 pcsp_sync_stop(chip);
194 pcspkr_stop_sound();
195}
196
197#ifdef CONFIG_PM_SLEEP
198static int pcsp_suspend(struct device *dev)
199{
200 struct snd_pcsp *chip = dev_get_drvdata(dev);
201 pcsp_stop_beep(chip);
202 snd_pcm_suspend_all(chip->pcm);
203 return 0;
204}
205
206static SIMPLE_DEV_PM_OPS(pcsp_pm, pcsp_suspend, NULL);
207#define PCSP_PM_OPS &pcsp_pm
208#else
209#define PCSP_PM_OPS NULL
210#endif
211
212static void pcsp_shutdown(struct platform_device *dev)
213{
214 struct snd_pcsp *chip = platform_get_drvdata(dev);
215 pcsp_stop_beep(chip);
216}
217
218static struct platform_driver pcsp_platform_driver = {
219 .driver = {
220 .name = "pcspkr",
221 .pm = PCSP_PM_OPS,
222 },
223 .probe = pcsp_probe,
224 .remove = pcsp_remove,
225 .shutdown = pcsp_shutdown,
226};
227
228static int __init pcsp_init(void)
229{
230 if (!enable)
231 return -ENODEV;
232 return platform_driver_register(&pcsp_platform_driver);
233}
234
235static void __exit pcsp_exit(void)
236{
237 platform_driver_unregister(&pcsp_platform_driver);
238}
239
240module_init(pcsp_init);
241module_exit(pcsp_exit);
242
