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/io.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/dmaengine.h>
  18
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/ac97_codec.h>
  22 #include <sound/initval.h>
  23 #include <sound/pxa2xx-lib.h>
  24 #include <sound/dmaengine_pcm.h>
  25
  26 #include <mach/regs-ac97.h>
  27 #include <mach/audio.h>
  28
  29 #include "pxa2xx-pcm.h"
  30
  31 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
  32 {
  33         if (!pxa2xx_ac97_try_cold_reset(ac97)) {
  34                 pxa2xx_ac97_try_warm_reset(ac97);
  35         }
  36
  37         pxa2xx_ac97_finish_reset(ac97);
  38 }
  39
  40 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  41         .read   = pxa2xx_ac97_read,
  42         .write  = pxa2xx_ac97_write,
  43         .reset  = pxa2xx_ac97_reset,
  44 };
  45
  46 static unsigned long pxa2xx_ac97_pcm_out_req = 12;
  47 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
  48         .addr           = __PREG(PCDR),
  49         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  50         .maxburst       = 32,
  51         .filter_data    = &pxa2xx_ac97_pcm_out_req,
  52 };
  53
  54 static unsigned long pxa2xx_ac97_pcm_in_req = 11;
  55 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
  56         .addr           = __PREG(PCDR),
  57         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  58         .maxburst       = 32,
  59         .filter_data    = &pxa2xx_ac97_pcm_in_req,
  60 };
  61
  62 static struct snd_pcm *pxa2xx_ac97_pcm;
  63 static struct snd_ac97 *pxa2xx_ac97_ac97;
  64
  65 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
  66 {
  67         struct snd_pcm_runtime *runtime = substream->runtime;
  68         pxa2xx_audio_ops_t *platform_ops;
  69         int r;
  70
  71         runtime->hw.channels_min = 2;
  72         runtime->hw.channels_max = 2;
  73
  74         r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  75             AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
  76         runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
  77         snd_pcm_limit_hw_rates(runtime);
  78
  79         platform_ops = substream->pcm->card->dev->platform_data;
  80         if (platform_ops && platform_ops->startup)
  81                 return platform_ops->startup(substream, platform_ops->priv);
  82         else
  83                 return 0;
  84 }
  85
  86 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
  87 {
  88         pxa2xx_audio_ops_t *platform_ops;
  89
  90         platform_ops = substream->pcm->card->dev->platform_data;
  91         if (platform_ops && platform_ops->shutdown)
  92                 platform_ops->shutdown(substream, platform_ops->priv);
  93 }
  94
  95 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
  96 {
  97         struct snd_pcm_runtime *runtime = substream->runtime;
  98         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  99                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 100         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 101 }
 102
 103 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
 104         .playback_params        = &pxa2xx_ac97_pcm_out,
 105         .capture_params         = &pxa2xx_ac97_pcm_in,
 106         .startup                = pxa2xx_ac97_pcm_startup,
 107         .shutdown               = pxa2xx_ac97_pcm_shutdown,
 108         .prepare                = pxa2xx_ac97_pcm_prepare,
 109 };
 110
 111 #ifdef CONFIG_PM_SLEEP
 112
 113 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 114 {
 115         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 116
 117         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 118         snd_pcm_suspend_all(pxa2xx_ac97_pcm);
 119         snd_ac97_suspend(pxa2xx_ac97_ac97);
 120         if (platform_ops && platform_ops->suspend)
 121                 platform_ops->suspend(platform_ops->priv);
 122
 123         return pxa2xx_ac97_hw_suspend();
 124 }
 125
 126 static int pxa2xx_ac97_do_resume(struct snd_card *card)
 127 {
 128         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 129         int rc;
 130
 131         rc = pxa2xx_ac97_hw_resume();
 132         if (rc)
 133                 return rc;
 134
 135         if (platform_ops && platform_ops->resume)
 136                 platform_ops->resume(platform_ops->priv);
 137         snd_ac97_resume(pxa2xx_ac97_ac97);
 138         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 139
 140         return 0;
 141 }
 142
 143 static int pxa2xx_ac97_suspend(struct device *dev)
 144 {
 145         struct snd_card *card = dev_get_drvdata(dev);
 146         int ret = 0;
 147
 148         if (card)
 149                 ret = pxa2xx_ac97_do_suspend(card);
 150
 151         return ret;
 152 }
 153
 154 static int pxa2xx_ac97_resume(struct device *dev)
 155 {
 156         struct snd_card *card = dev_get_drvdata(dev);
 157         int ret = 0;
 158
 159         if (card)
 160                 ret = pxa2xx_ac97_do_resume(card);
 161
 162         return ret;
 163 }
 164
 165 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 166 #endif
 167
 168 static int 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 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                 pxa2xx_ac97_hw_remove(dev);
 236         }
 237
 238         return 0;
 239 }
 240
 241 static struct platform_driver pxa2xx_ac97_driver = {
 242         .probe          = pxa2xx_ac97_probe,
 243         .remove         = pxa2xx_ac97_remove,
 244         .driver         = {
 245                 .name   = "pxa2xx-ac97",
 246                 .owner  = THIS_MODULE,
 247 #ifdef CONFIG_PM_SLEEP
 248                 .pm     = &pxa2xx_ac97_pm_ops,
 249 #endif
 250         },
 251 };
 252
 253 module_platform_driver(pxa2xx_ac97_driver);
 254
 255 MODULE_AUTHOR("Nicolas Pitre");
 256 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 257 MODULE_LICENSE("GPL");
 258 MODULE_ALIAS("platform:pxa2xx-ac97");