asoc: tegra: Add TDM mode support
[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/regs-ac97.h>
24 #include <mach/audio.h>
25
26 #include "pxa2xx-pcm.h"
27
28 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
29 {
30         if (!pxa2xx_ac97_try_cold_reset(ac97)) {
31                 pxa2xx_ac97_try_warm_reset(ac97);
32         }
33
34         pxa2xx_ac97_finish_reset(ac97);
35 }
36
37 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
38         .read   = pxa2xx_ac97_read,
39         .write  = pxa2xx_ac97_write,
40         .reset  = pxa2xx_ac97_reset,
41 };
42
43 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
44         .name                   = "AC97 PCM out",
45         .dev_addr               = __PREG(PCDR),
46         .drcmr                  = &DRCMR(12),
47         .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
48                                   DCMD_BURST32 | DCMD_WIDTH4,
49 };
50
51 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
52         .name                   = "AC97 PCM in",
53         .dev_addr               = __PREG(PCDR),
54         .drcmr                  = &DRCMR(11),
55         .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
56                                   DCMD_BURST32 | DCMD_WIDTH4,
57 };
58
59 static struct snd_pcm *pxa2xx_ac97_pcm;
60 static struct snd_ac97 *pxa2xx_ac97_ac97;
61
62 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
63 {
64         struct snd_pcm_runtime *runtime = substream->runtime;
65         pxa2xx_audio_ops_t *platform_ops;
66         int r;
67
68         runtime->hw.channels_min = 2;
69         runtime->hw.channels_max = 2;
70
71         r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
72             AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
73         runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
74         snd_pcm_limit_hw_rates(runtime);
75
76         platform_ops = substream->pcm->card->dev->platform_data;
77         if (platform_ops && platform_ops->startup)
78                 return platform_ops->startup(substream, platform_ops->priv);
79         else
80                 return 0;
81 }
82
83 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
84 {
85         pxa2xx_audio_ops_t *platform_ops;
86
87         platform_ops = substream->pcm->card->dev->platform_data;
88         if (platform_ops && platform_ops->shutdown)
89                 platform_ops->shutdown(substream, platform_ops->priv);
90 }
91
92 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
93 {
94         struct snd_pcm_runtime *runtime = substream->runtime;
95         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
96                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
97         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
98 }
99
100 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
101         .playback_params        = &pxa2xx_ac97_pcm_out,
102         .capture_params         = &pxa2xx_ac97_pcm_in,
103         .startup                = pxa2xx_ac97_pcm_startup,
104         .shutdown               = pxa2xx_ac97_pcm_shutdown,
105         .prepare                = pxa2xx_ac97_pcm_prepare,
106 };
107
108 #ifdef CONFIG_PM
109
110 static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
111 {
112         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
113
114         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
115         snd_pcm_suspend_all(pxa2xx_ac97_pcm);
116         snd_ac97_suspend(pxa2xx_ac97_ac97);
117         if (platform_ops && platform_ops->suspend)
118                 platform_ops->suspend(platform_ops->priv);
119
120         return pxa2xx_ac97_hw_suspend();
121 }
122
123 static int pxa2xx_ac97_do_resume(struct snd_card *card)
124 {
125         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
126         int rc;
127
128         rc = pxa2xx_ac97_hw_resume();
129         if (rc)
130                 return rc;
131
132         if (platform_ops && platform_ops->resume)
133                 platform_ops->resume(platform_ops->priv);
134         snd_ac97_resume(pxa2xx_ac97_ac97);
135         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
136
137         return 0;
138 }
139
140 static int pxa2xx_ac97_suspend(struct device *dev)
141 {
142         struct snd_card *card = dev_get_drvdata(dev);
143         int ret = 0;
144
145         if (card)
146                 ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
147
148         return ret;
149 }
150
151 static int pxa2xx_ac97_resume(struct device *dev)
152 {
153         struct snd_card *card = dev_get_drvdata(dev);
154         int ret = 0;
155
156         if (card)
157                 ret = pxa2xx_ac97_do_resume(card);
158
159         return ret;
160 }
161
162 static const struct dev_pm_ops pxa2xx_ac97_pm_ops = {
163         .suspend        = pxa2xx_ac97_suspend,
164         .resume         = pxa2xx_ac97_resume,
165 };
166 #endif
167
168 static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
169 {
170         struct snd_card *card;
171         struct snd_ac97_bus *ac97_bus;
172         struct snd_ac97_template ac97_template;
173         int ret;
174         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
175
176         if (dev->id >= 0) {
177                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
178                 ret = -ENXIO;
179                 goto err_dev;
180         }
181
182         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
183                               THIS_MODULE, 0, &card);
184         if (ret < 0)
185                 goto err;
186
187         card->dev = &dev->dev;
188         strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
189
190         ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
191         if (ret)
192                 goto err;
193
194         ret = pxa2xx_ac97_hw_probe(dev);
195         if (ret)
196                 goto err;
197
198         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
199         if (ret)
200                 goto err_remove;
201         memset(&ac97_template, 0, sizeof(ac97_template));
202         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
203         if (ret)
204                 goto err_remove;
205
206         snprintf(card->shortname, sizeof(card->shortname),
207                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
208         snprintf(card->longname, sizeof(card->longname),
209                  "%s (%s)", dev->dev.driver->name, card->mixername);
210
211         if (pdata && pdata->codec_pdata[0])
212                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
213         snd_card_set_dev(card, &dev->dev);
214         ret = snd_card_register(card);
215         if (ret == 0) {
216                 platform_set_drvdata(dev, card);
217                 return 0;
218         }
219
220 err_remove:
221         pxa2xx_ac97_hw_remove(dev);
222 err:
223         if (card)
224                 snd_card_free(card);
225 err_dev:
226         return ret;
227 }
228
229 static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
230 {
231         struct snd_card *card = platform_get_drvdata(dev);
232
233         if (card) {
234                 snd_card_free(card);
235                 platform_set_drvdata(dev, NULL);
236                 pxa2xx_ac97_hw_remove(dev);
237         }
238
239         return 0;
240 }
241
242 static struct platform_driver pxa2xx_ac97_driver = {
243         .probe          = pxa2xx_ac97_probe,
244         .remove         = __devexit_p(pxa2xx_ac97_remove),
245         .driver         = {
246                 .name   = "pxa2xx-ac97",
247                 .owner  = THIS_MODULE,
248 #ifdef CONFIG_PM
249                 .pm     = &pxa2xx_ac97_pm_ops,
250 #endif
251         },
252 };
253
254 static int __init pxa2xx_ac97_init(void)
255 {
256         return platform_driver_register(&pxa2xx_ac97_driver);
257 }
258
259 static void __exit pxa2xx_ac97_exit(void)
260 {
261         platform_driver_unregister(&pxa2xx_ac97_driver);
262 }
263
264 module_init(pxa2xx_ac97_init);
265 module_exit(pxa2xx_ac97_exit);
266
267 MODULE_AUTHOR("Nicolas Pitre");
268 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
269 MODULE_LICENSE("GPL");
270 MODULE_ALIAS("platform:pxa2xx-ac97");