Commit | Line | Data |
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9ab4d072 SS |
1 | /* |
2 | * PC-Speaker driver for Linux | |
3 | * | |
4 | * Copyright (C) 1997-2001 David Woodhouse | |
5 | * Copyright (C) 2001-2008 Stas Sergeev | |
6 | */ | |
7 | ||
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> | |
9ab4d072 | 14 | #include <linux/input.h> |
9ecaedae | 15 | #include <linux/delay.h> |
9ab4d072 SS |
16 | #include <asm/bitops.h> |
17 | #include "pcsp_input.h" | |
18 | #include "pcsp.h" | |
19 | ||
20 | MODULE_AUTHOR("Stas Sergeev <stsp@users.sourceforge.net>"); | |
21 | MODULE_DESCRIPTION("PC-Speaker driver"); | |
22 | MODULE_LICENSE("GPL"); | |
23 | MODULE_SUPPORTED_DEVICE("{{PC-Speaker, pcsp}}"); | |
24 | MODULE_ALIAS("platform:pcspkr"); | |
25 | ||
26 | static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */ | |
27 | static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ | |
28 | static int enable = SNDRV_DEFAULT_ENABLE1; /* Enable this card */ | |
29 | ||
30 | module_param(index, int, 0444); | |
31 | MODULE_PARM_DESC(index, "Index value for pcsp soundcard."); | |
32 | module_param(id, charp, 0444); | |
33 | MODULE_PARM_DESC(id, "ID string for pcsp soundcard."); | |
34 | module_param(enable, bool, 0444); | |
52337310 | 35 | MODULE_PARM_DESC(enable, "Enable PC-Speaker sound."); |
9ab4d072 SS |
36 | |
37 | struct snd_pcsp pcsp_chip; | |
38 | ||
39 | static 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 | /* Register device */ | |
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 | ||
90 | static 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); | |
4b7afb0d | 99 | pcsp_chip.timer.cb_mode = HRTIMER_CB_SOFTIRQ; |
9ab4d072 SS |
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 | ||
138 | static int __devinit alsa_card_pcsp_init(struct device *dev) | |
139 | { | |
52337310 SS |
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 | } | |
9ab4d072 SS |
147 | |
148 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
149 | /* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */ | |
efd89d9d SS |
150 | printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, " |
151 | "which may make the sound noisy.\n"); | |
9ab4d072 SS |
152 | #endif |
153 | ||
9ab4d072 SS |
154 | return 0; |
155 | } | |
156 | ||
157 | static void __devexit alsa_card_pcsp_exit(struct snd_pcsp *chip) | |
158 | { | |
159 | snd_card_free(chip->card); | |
160 | } | |
161 | ||
162 | static int __devinit pcsp_probe(struct platform_device *dev) | |
163 | { | |
164 | int err; | |
52337310 | 165 | |
9ab4d072 SS |
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 | ||
180 | static 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 | ||
189 | static void pcsp_stop_beep(struct snd_pcsp *chip) | |
190 | { | |
1bc1f305 | 191 | spin_lock_irq(&chip->substream_lock); |
9ab4d072 SS |
192 | if (!chip->playback_substream) |
193 | pcspkr_stop_sound(); | |
1bc1f305 | 194 | spin_unlock_irq(&chip->substream_lock); |
9ab4d072 SS |
195 | } |
196 | ||
983e0972 | 197 | #ifdef CONFIG_PM |
9ab4d072 SS |
198 | static 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 | } | |
983e0972 JFS |
205 | #else |
206 | #define pcsp_suspend NULL | |
207 | #endif /* CONFIG_PM */ | |
9ab4d072 SS |
208 | |
209 | static void pcsp_shutdown(struct platform_device *dev) | |
210 | { | |
211 | struct snd_pcsp *chip = platform_get_drvdata(dev); | |
212 | pcsp_stop_beep(chip); | |
213 | } | |
214 | ||
215 | static 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 | ||
226 | static int __init pcsp_init(void) | |
227 | { | |
52337310 SS |
228 | if (!enable) |
229 | return -ENODEV; | |
9ab4d072 SS |
230 | return platform_driver_register(&pcsp_platform_driver); |
231 | } | |
232 | ||
233 | static void __exit pcsp_exit(void) | |
234 | { | |
235 | platform_driver_unregister(&pcsp_platform_driver); | |
236 | } | |
237 | ||
238 | module_init(pcsp_init); | |
239 | module_exit(pcsp_exit); |