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Linux/sound/arm/pxa2xx-ac97.c

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  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/io.h>
 15 #include <linux/module.h>
 16 #include <linux/platform_device.h>
 17 
 18 #include <sound/core.h>
 19 #include <sound/pcm.h>
 20 #include <sound/ac97_codec.h>
 21 #include <sound/initval.h>
 22 #include <sound/pxa2xx-lib.h>
 23 
 24 #include <mach/regs-ac97.h>
 25 #include <mach/audio.h>
 26 
 27 #include "pxa2xx-pcm.h"
 28 
 29 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 30 {
 31         if (!pxa2xx_ac97_try_cold_reset(ac97)) {
 32                 pxa2xx_ac97_try_warm_reset(ac97);
 33         }
 34 
 35         pxa2xx_ac97_finish_reset(ac97);
 36 }
 37 
 38 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 39         .read   = pxa2xx_ac97_read,
 40         .write  = pxa2xx_ac97_write,
 41         .reset  = pxa2xx_ac97_reset,
 42 };
 43 
 44 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
 45         .name                   = "AC97 PCM out",
 46         .dev_addr               = __PREG(PCDR),
 47         .drcmr                  = &DRCMR(12),
 48         .dcmd                   = DCMD_INCSRCADDR | DCMD_FLOWTRG |
 49                                   DCMD_BURST32 | DCMD_WIDTH4,
 50 };
 51 
 52 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
 53         .name                   = "AC97 PCM in",
 54         .dev_addr               = __PREG(PCDR),
 55         .drcmr                  = &DRCMR(11),
 56         .dcmd                   = DCMD_INCTRGADDR | DCMD_FLOWSRC |
 57                                   DCMD_BURST32 | DCMD_WIDTH4,
 58 };
 59 
 60 static struct snd_pcm *pxa2xx_ac97_pcm;
 61 static struct snd_ac97 *pxa2xx_ac97_ac97;
 62 
 63 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
 64 {
 65         struct snd_pcm_runtime *runtime = substream->runtime;
 66         pxa2xx_audio_ops_t *platform_ops;
 67         int r;
 68 
 69         runtime->hw.channels_min = 2;
 70         runtime->hw.channels_max = 2;
 71 
 72         r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 73             AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
 74         runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
 75         snd_pcm_limit_hw_rates(runtime);
 76 
 77         platform_ops = substream->pcm->card->dev->platform_data;
 78         if (platform_ops && platform_ops->startup)
 79                 return platform_ops->startup(substream, platform_ops->priv);
 80         else
 81                 return 0;
 82 }
 83 
 84 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
 85 {
 86         pxa2xx_audio_ops_t *platform_ops;
 87 
 88         platform_ops = substream->pcm->card->dev->platform_data;
 89         if (platform_ops && platform_ops->shutdown)
 90                 platform_ops->shutdown(substream, platform_ops->priv);
 91 }
 92 
 93 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 94 {
 95         struct snd_pcm_runtime *runtime = substream->runtime;
 96         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 97                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 98         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 99 }
100 
101 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
102         .playback_params        = &pxa2xx_ac97_pcm_out,
103         .capture_params         = &pxa2xx_ac97_pcm_in,
104         .startup                = pxa2xx_ac97_pcm_startup,
105         .shutdown               = pxa2xx_ac97_pcm_shutdown,
106         .prepare                = pxa2xx_ac97_pcm_prepare,
107 };
108 
109 #ifdef CONFIG_PM
110 
111 static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
112 {
113         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
114 
115         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
116         snd_pcm_suspend_all(pxa2xx_ac97_pcm);
117         snd_ac97_suspend(pxa2xx_ac97_ac97);
118         if (platform_ops && platform_ops->suspend)
119                 platform_ops->suspend(platform_ops->priv);
120 
121         return pxa2xx_ac97_hw_suspend();
122 }
123 
124 static int pxa2xx_ac97_do_resume(struct snd_card *card)
125 {
126         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
127         int rc;
128 
129         rc = pxa2xx_ac97_hw_resume();
130         if (rc)
131                 return rc;
132 
133         if (platform_ops && platform_ops->resume)
134                 platform_ops->resume(platform_ops->priv);
135         snd_ac97_resume(pxa2xx_ac97_ac97);
136         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
137 
138         return 0;
139 }
140 
141 static int pxa2xx_ac97_suspend(struct device *dev)
142 {
143         struct snd_card *card = dev_get_drvdata(dev);
144         int ret = 0;
145 
146         if (card)
147                 ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
148 
149         return ret;
150 }
151 
152 static int pxa2xx_ac97_resume(struct device *dev)
153 {
154         struct snd_card *card = dev_get_drvdata(dev);
155         int ret = 0;
156 
157         if (card)
158                 ret = pxa2xx_ac97_do_resume(card);
159 
160         return ret;
161 }
162 
163 static const struct dev_pm_ops pxa2xx_ac97_pm_ops = {
164         .suspend        = pxa2xx_ac97_suspend,
165         .resume         = pxa2xx_ac97_resume,
166 };
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         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
176 
177         if (dev->id >= 0) {
178                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
179                 ret = -ENXIO;
180                 goto err_dev;
181         }
182 
183         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
184                               THIS_MODULE, 0, &card);
185         if (ret < 0)
186                 goto err;
187 
188         card->dev = &dev->dev;
189         strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
190 
191         ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
192         if (ret)
193                 goto err;
194 
195         ret = pxa2xx_ac97_hw_probe(dev);
196         if (ret)
197                 goto err;
198 
199         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
200         if (ret)
201                 goto err_remove;
202         memset(&ac97_template, 0, sizeof(ac97_template));
203         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
204         if (ret)
205                 goto err_remove;
206 
207         snprintf(card->shortname, sizeof(card->shortname),
208                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
209         snprintf(card->longname, sizeof(card->longname),
210                  "%s (%s)", dev->dev.driver->name, card->mixername);
211 
212         if (pdata && pdata->codec_pdata[0])
213                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
214         snd_card_set_dev(card, &dev->dev);
215         ret = snd_card_register(card);
216         if (ret == 0) {
217                 platform_set_drvdata(dev, card);
218                 return 0;
219         }
220 
221 err_remove:
222         pxa2xx_ac97_hw_remove(dev);
223 err:
224         if (card)
225                 snd_card_free(card);
226 err_dev:
227         return ret;
228 }
229 
230 static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
231 {
232         struct snd_card *card = platform_get_drvdata(dev);
233 
234         if (card) {
235                 snd_card_free(card);
236                 platform_set_drvdata(dev, NULL);
237                 pxa2xx_ac97_hw_remove(dev);
238         }
239 
240         return 0;
241 }
242 
243 static struct platform_driver pxa2xx_ac97_driver = {
244         .probe          = pxa2xx_ac97_probe,
245         .remove         = __devexit_p(pxa2xx_ac97_remove),
246         .driver         = {
247                 .name   = "pxa2xx-ac97",
248                 .owner  = THIS_MODULE,
249 #ifdef CONFIG_PM
250                 .pm     = &pxa2xx_ac97_pm_ops,
251 #endif
252         },
253 };
254 
255 module_platform_driver(pxa2xx_ac97_driver);
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");
261 

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