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 #include <linux/dma/pxa-dma.h>
  19
  20 #include <sound/core.h>
  21 #include <sound/pcm.h>
  22 #include <sound/ac97_codec.h>
  23 #include <sound/initval.h>
  24 #include <sound/pxa2xx-lib.h>
  25 #include <sound/dmaengine_pcm.h>
  26
  27 #include <mach/regs-ac97.h>
  28 #include <mach/audio.h>
  29
  30 #include "pxa2xx-pcm.h"
  31
  32 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
  33 {
  34         if (!pxa2xx_ac97_try_cold_reset(ac97)) {
  35                 pxa2xx_ac97_try_warm_reset(ac97);
  36         }
  37
  38         pxa2xx_ac97_finish_reset(ac97);
  39 }
  40
  41 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  42         .read   = pxa2xx_ac97_read,
  43         .write  = pxa2xx_ac97_write,
  44         .reset  = pxa2xx_ac97_reset,
  45 };
  46
  47 static struct pxad_param pxa2xx_ac97_pcm_out_req = {
  48         .prio = PXAD_PRIO_LOWEST,
  49         .drcmr = 12,
  50 };
  51
  52 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
  53         .addr           = __PREG(PCDR),
  54         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  55         .maxburst       = 32,
  56         .filter_data    = &pxa2xx_ac97_pcm_out_req,
  57 };
  58
  59 static struct pxad_param pxa2xx_ac97_pcm_in_req = {
  60         .prio = PXAD_PRIO_LOWEST,
  61         .drcmr = 11,
  62 };
  63
  64 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
  65         .addr           = __PREG(PCDR),
  66         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  67         .maxburst       = 32,
  68         .filter_data    = &pxa2xx_ac97_pcm_in_req,
  69 };
  70
  71 static struct snd_pcm *pxa2xx_ac97_pcm;
  72 static struct snd_ac97 *pxa2xx_ac97_ac97;
  73
  74 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
  75 {
  76         struct snd_pcm_runtime *runtime = substream->runtime;
  77         pxa2xx_audio_ops_t *platform_ops;
  78         int r;
  79
  80         runtime->hw.channels_min = 2;
  81         runtime->hw.channels_max = 2;
  82
  83         r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  84             AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
  85         runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
  86         snd_pcm_limit_hw_rates(runtime);
  87
  88         platform_ops = substream->pcm->card->dev->platform_data;
  89         if (platform_ops && platform_ops->startup)
  90                 return platform_ops->startup(substream, platform_ops->priv);
  91         else
  92                 return 0;
  93 }
  94
  95 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
  96 {
  97         pxa2xx_audio_ops_t *platform_ops;
  98
  99         platform_ops = substream->pcm->card->dev->platform_data;
 100         if (platform_ops && platform_ops->shutdown)
 101                 platform_ops->shutdown(substream, platform_ops->priv);
 102 }
 103
 104 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 105 {
 106         struct snd_pcm_runtime *runtime = substream->runtime;
 107         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 108                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 109         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 110 }
 111
 112 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
 113         .playback_params        = &pxa2xx_ac97_pcm_out,
 114         .capture_params         = &pxa2xx_ac97_pcm_in,
 115         .startup                = pxa2xx_ac97_pcm_startup,
 116         .shutdown               = pxa2xx_ac97_pcm_shutdown,
 117         .prepare                = pxa2xx_ac97_pcm_prepare,
 118 };
 119
 120 #ifdef CONFIG_PM_SLEEP
 121
 122 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 123 {
 124         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 125
 126         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 127         snd_pcm_suspend_all(pxa2xx_ac97_pcm);
 128         snd_ac97_suspend(pxa2xx_ac97_ac97);
 129         if (platform_ops && platform_ops->suspend)
 130                 platform_ops->suspend(platform_ops->priv);
 131
 132         return pxa2xx_ac97_hw_suspend();
 133 }
 134
 135 static int pxa2xx_ac97_do_resume(struct snd_card *card)
 136 {
 137         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 138         int rc;
 139
 140         rc = pxa2xx_ac97_hw_resume();
 141         if (rc)
 142                 return rc;
 143
 144         if (platform_ops && platform_ops->resume)
 145                 platform_ops->resume(platform_ops->priv);
 146         snd_ac97_resume(pxa2xx_ac97_ac97);
 147         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 148
 149         return 0;
 150 }
 151
 152 static int pxa2xx_ac97_suspend(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_suspend(card);
 159
 160         return ret;
 161 }
 162
 163 static int pxa2xx_ac97_resume(struct device *dev)
 164 {
 165         struct snd_card *card = dev_get_drvdata(dev);
 166         int ret = 0;
 167
 168         if (card)
 169                 ret = pxa2xx_ac97_do_resume(card);
 170
 171         return ret;
 172 }
 173
 174 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 175 #endif
 176
 177 static int pxa2xx_ac97_probe(struct platform_device *dev)
 178 {
 179         struct snd_card *card;
 180         struct snd_ac97_bus *ac97_bus;
 181         struct snd_ac97_template ac97_template;
 182         int ret;
 183         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
 184
 185         if (dev->id >= 0) {
 186                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
 187                 ret = -ENXIO;
 188                 goto err_dev;
 189         }
 190
 191         ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 192                            THIS_MODULE, 0, &card);
 193         if (ret < 0)
 194                 goto err;
 195
 196         strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 197
 198         ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
 199         if (ret)
 200                 goto err;
 201
 202         ret = pxa2xx_ac97_hw_probe(dev);
 203         if (ret)
 204                 goto err;
 205
 206         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 207         if (ret)
 208                 goto err_remove;
 209         memset(&ac97_template, 0, sizeof(ac97_template));
 210         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 211         if (ret)
 212                 goto err_remove;
 213
 214         snprintf(card->shortname, sizeof(card->shortname),
 215                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 216         snprintf(card->longname, sizeof(card->longname),
 217                  "%s (%s)", dev->dev.driver->name, card->mixername);
 218
 219         if (pdata && pdata->codec_pdata[0])
 220                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 221         ret = snd_card_register(card);
 222         if (ret == 0) {
 223                 platform_set_drvdata(dev, card);
 224                 return 0;
 225         }
 226
 227 err_remove:
 228         pxa2xx_ac97_hw_remove(dev);
 229 err:
 230         if (card)
 231                 snd_card_free(card);
 232 err_dev:
 233         return ret;
 234 }
 235
 236 static int pxa2xx_ac97_remove(struct platform_device *dev)
 237 {
 238         struct snd_card *card = platform_get_drvdata(dev);
 239
 240         if (card) {
 241                 snd_card_free(card);
 242                 pxa2xx_ac97_hw_remove(dev);
 243         }
 244
 245         return 0;
 246 }
 247
 248 static struct platform_driver pxa2xx_ac97_driver = {
 249         .probe          = pxa2xx_ac97_probe,
 250         .remove         = pxa2xx_ac97_remove,
 251         .driver         = {
 252                 .name   = "pxa2xx-ac97",
 253 #ifdef CONFIG_PM_SLEEP
 254                 .pm     = &pxa2xx_ac97_pm_ops,
 255 #endif
 256         },
 257 };
 258
 259 module_platform_driver(pxa2xx_ac97_driver);
 260
 261 MODULE_AUTHOR("Nicolas Pitre");
 262 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 263 MODULE_LICENSE("GPL");
 264 MODULE_ALIAS("platform:pxa2xx-ac97");