ALSA: drop outdated and broken sa11xx-uda1341 driver
[linux-2.6.git] / sound / arm / pxa2xx-ac97.c
1 /*
2  * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
3  *
4  * Author:      Nicolas Pitre
5  * Created:     Dec 02, 2004
6  * Copyright:   MontaVista Software Inc.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/ac97_codec.h>
20 #include <sound/initval.h>
21 #include <sound/pxa2xx-lib.h>
22
23 #include <mach/hardware.h>
24 #include <mach/pxa-regs.h>
25 #include <mach/regs-ac97.h>
26 #include <mach/audio.h>
27
28 #include "pxa2xx-pcm.h"
29
30 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
31 {
32         if (!pxa2xx_ac97_try_cold_reset(ac97)) {
33                 pxa2xx_ac97_try_warm_reset(ac97);
34         }
35
36         pxa2xx_ac97_finish_reset(ac97);
37 }
38
39 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
40         .read   = pxa2xx_ac97_read,
41         .write  = pxa2xx_ac97_write,
42         .reset  = pxa2xx_ac97_reset,
43 };
44
45 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
46         .name                   = "AC97 PCM out",
47         .dev_addr               = __PREG(PCDR),
48         .drcmr                  = &DRCMR(12),
49         .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
50                                   DCMD_BURST32 | DCMD_WIDTH4,
51 };
52
53 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
54         .name                   = "AC97 PCM in",
55         .dev_addr               = __PREG(PCDR),
56         .drcmr                  = &DRCMR(11),
57         .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
58                                   DCMD_BURST32 | DCMD_WIDTH4,
59 };
60
61 static struct snd_pcm *pxa2xx_ac97_pcm;
62 static struct snd_ac97 *pxa2xx_ac97_ac97;
63
64 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
65 {
66         struct snd_pcm_runtime *runtime = substream->runtime;
67         pxa2xx_audio_ops_t *platform_ops;
68         int r;
69
70         runtime->hw.channels_min = 2;
71         runtime->hw.channels_max = 2;
72
73         r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
74             AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
75         runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
76         snd_pcm_limit_hw_rates(runtime);
77
78         platform_ops = substream->pcm->card->dev->platform_data;
79         if (platform_ops && platform_ops->startup)
80                 return platform_ops->startup(substream, platform_ops->priv);
81         else
82                 return 0;
83 }
84
85 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
86 {
87         pxa2xx_audio_ops_t *platform_ops;
88
89         platform_ops = substream->pcm->card->dev->platform_data;
90         if (platform_ops && platform_ops->shutdown)
91                 platform_ops->shutdown(substream, platform_ops->priv);
92 }
93
94 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
95 {
96         struct snd_pcm_runtime *runtime = substream->runtime;
97         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
98                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
99         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
100 }
101
102 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
103         .playback_params        = &pxa2xx_ac97_pcm_out,
104         .capture_params         = &pxa2xx_ac97_pcm_in,
105         .startup                = pxa2xx_ac97_pcm_startup,
106         .shutdown               = pxa2xx_ac97_pcm_shutdown,
107         .prepare                = pxa2xx_ac97_pcm_prepare,
108 };
109
110 #ifdef CONFIG_PM
111
112 static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
113 {
114         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
115
116         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
117         snd_pcm_suspend_all(pxa2xx_ac97_pcm);
118         snd_ac97_suspend(pxa2xx_ac97_ac97);
119         if (platform_ops && platform_ops->suspend)
120                 platform_ops->suspend(platform_ops->priv);
121
122         return pxa2xx_ac97_hw_suspend();
123 }
124
125 static int pxa2xx_ac97_do_resume(struct snd_card *card)
126 {
127         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
128         int rc;
129
130         rc = pxa2xx_ac97_hw_resume();
131         if (rc)
132                 return rc;
133
134         if (platform_ops && platform_ops->resume)
135                 platform_ops->resume(platform_ops->priv);
136         snd_ac97_resume(pxa2xx_ac97_ac97);
137         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
138
139         return 0;
140 }
141
142 static int pxa2xx_ac97_suspend(struct platform_device *dev, pm_message_t state)
143 {
144         struct snd_card *card = platform_get_drvdata(dev);
145         int ret = 0;
146
147         if (card)
148                 ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
149
150         return ret;
151 }
152
153 static int pxa2xx_ac97_resume(struct platform_device *dev)
154 {
155         struct snd_card *card = platform_get_drvdata(dev);
156         int ret = 0;
157
158         if (card)
159                 ret = pxa2xx_ac97_do_resume(card);
160
161         return ret;
162 }
163
164 #else
165 #define pxa2xx_ac97_suspend     NULL
166 #define pxa2xx_ac97_resume      NULL
167 #endif
168
169 static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
170 {
171         struct snd_card *card;
172         struct snd_ac97_bus *ac97_bus;
173         struct snd_ac97_template ac97_template;
174         int ret;
175
176         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
177                               THIS_MODULE, 0, &card);
178         if (ret < 0)
179                 goto err;
180
181         card->dev = &dev->dev;
182         strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
183
184         ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
185         if (ret)
186                 goto err;
187
188         ret = pxa2xx_ac97_hw_probe(dev);
189         if (ret)
190                 goto err;
191
192         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
193         if (ret)
194                 goto err_remove;
195         memset(&ac97_template, 0, sizeof(ac97_template));
196         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
197         if (ret)
198                 goto err_remove;
199
200         snprintf(card->shortname, sizeof(card->shortname),
201                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
202         snprintf(card->longname, sizeof(card->longname),
203                  "%s (%s)", dev->dev.driver->name, card->mixername);
204
205         snd_card_set_dev(card, &dev->dev);
206         ret = snd_card_register(card);
207         if (ret == 0) {
208                 platform_set_drvdata(dev, card);
209                 return 0;
210         }
211
212 err_remove:
213         pxa2xx_ac97_hw_remove(dev);
214 err:
215         if (card)
216                 snd_card_free(card);
217         return ret;
218 }
219
220 static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
221 {
222         struct snd_card *card = platform_get_drvdata(dev);
223
224         if (card) {
225                 snd_card_free(card);
226                 platform_set_drvdata(dev, NULL);
227                 pxa2xx_ac97_hw_remove(dev);
228         }
229
230         return 0;
231 }
232
233 static struct platform_driver pxa2xx_ac97_driver = {
234         .probe          = pxa2xx_ac97_probe,
235         .remove         = __devexit_p(pxa2xx_ac97_remove),
236         .suspend        = pxa2xx_ac97_suspend,
237         .resume         = pxa2xx_ac97_resume,
238         .driver         = {
239                 .name   = "pxa2xx-ac97",
240                 .owner  = THIS_MODULE,
241         },
242 };
243
244 static int __init pxa2xx_ac97_init(void)
245 {
246         return platform_driver_register(&pxa2xx_ac97_driver);
247 }
248
249 static void __exit pxa2xx_ac97_exit(void)
250 {
251         platform_driver_unregister(&pxa2xx_ac97_driver);
252 }
253
254 module_init(pxa2xx_ac97_init);
255 module_exit(pxa2xx_ac97_exit);
256
257 MODULE_AUTHOR("Nicolas Pitre");
258 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
259 MODULE_LICENSE("GPL");
260 MODULE_ALIAS("platform:pxa2xx-ac97");