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
  29static 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
  38static 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
  44static 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
  52static 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
  60static struct snd_pcm *pxa2xx_ac97_pcm;
  61static struct snd_ac97 *pxa2xx_ac97_ac97;
  62
  63static 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
  84static 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
  93static 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
 101static 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_SLEEP
 110
 111static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 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
 124static 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
 141static 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);
 148
 149        return ret;
 150}
 151
 152static 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
 163static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 164#endif
 165
 166static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
 167{
 168        struct snd_card *card;
 169        struct snd_ac97_bus *ac97_bus;
 170        struct snd_ac97_template ac97_template;
 171        int ret;
 172        pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
 173
 174        if (dev->id >= 0) {
 175                dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
 176                ret = -ENXIO;
 177                goto err_dev;
 178        }
 179
 180        ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 181                              THIS_MODULE, 0, &card);
 182        if (ret < 0)
 183                goto err;
 184
 185        card->dev = &dev->dev;
 186        strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 187
 188        ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
 189        if (ret)
 190                goto err;
 191
 192        ret = pxa2xx_ac97_hw_probe(dev);
 193        if (ret)
 194                goto err;
 195
 196        ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 197        if (ret)
 198                goto err_remove;
 199        memset(&ac97_template, 0, sizeof(ac97_template));
 200        ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 201        if (ret)
 202                goto err_remove;
 203
 204        snprintf(card->shortname, sizeof(card->shortname),
 205                 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 206        snprintf(card->longname, sizeof(card->longname),
 207                 "%s (%s)", dev->dev.driver->name, card->mixername);
 208
 209        if (pdata && pdata->codec_pdata[0])
 210                snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 211        snd_card_set_dev(card, &dev->dev);
 212        ret = snd_card_register(card);
 213        if (ret == 0) {
 214                platform_set_drvdata(dev, card);
 215                return 0;
 216        }
 217
 218err_remove:
 219        pxa2xx_ac97_hw_remove(dev);
 220err:
 221        if (card)
 222                snd_card_free(card);
 223err_dev:
 224        return ret;
 225}
 226
 227static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
 228{
 229        struct snd_card *card = platform_get_drvdata(dev);
 230
 231        if (card) {
 232                snd_card_free(card);
 233                platform_set_drvdata(dev, NULL);
 234                pxa2xx_ac97_hw_remove(dev);
 235        }
 236
 237        return 0;
 238}
 239
 240static struct platform_driver pxa2xx_ac97_driver = {
 241        .probe          = pxa2xx_ac97_probe,
 242        .remove         = __devexit_p(pxa2xx_ac97_remove),
 243        .driver         = {
 244                .name   = "pxa2xx-ac97",
 245                .owner  = THIS_MODULE,
 246#ifdef CONFIG_PM_SLEEP
 247                .pm     = &pxa2xx_ac97_pm_ops,
 248#endif
 249        },
 250};
 251
 252module_platform_driver(pxa2xx_ac97_driver);
 253
 254MODULE_AUTHOR("Nicolas Pitre");
 255MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 256MODULE_LICENSE("GPL");
 257MODULE_ALIAS("platform:pxa2xx-ac97");
 258
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