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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/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 platform_device *dev, pm_message_t state)
 141 {
 142         struct snd_card *card = platform_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 platform_device *dev)
 152 {
 153         struct snd_card *card = platform_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 #else
 163 #define pxa2xx_ac97_suspend     NULL
 164 #define pxa2xx_ac97_resume      NULL
 165 #endif
 166
 167 static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
 168 {
 169         struct snd_card *card;
 170         struct snd_ac97_bus *ac97_bus;
 171         struct snd_ac97_template ac97_template;
 172         int ret;
 173
 174         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 175                               THIS_MODULE, 0, &card);
 176         if (ret < 0)
 177                 goto err;
 178
 179         card->dev = &dev->dev;
 180         strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 181
 182         ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
 183         if (ret)
 184                 goto err;
 185
 186         ret = pxa2xx_ac97_hw_probe(dev);
 187         if (ret)
 188                 goto err;
 189
 190         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 191         if (ret)
 192                 goto err_remove;
 193         memset(&ac97_template, 0, sizeof(ac97_template));
 194         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 195         if (ret)
 196                 goto err_remove;
 197
 198         snprintf(card->shortname, sizeof(card->shortname),
 199                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 200         snprintf(card->longname, sizeof(card->longname),
 201                  "%s (%s)", dev->dev.driver->name, card->mixername);
 202
 203         snd_card_set_dev(card, &dev->dev);
 204         ret = snd_card_register(card);
 205         if (ret == 0) {
 206                 platform_set_drvdata(dev, card);
 207                 return 0;
 208         }
 209
 210 err_remove:
 211         pxa2xx_ac97_hw_remove(dev);
 212 err:
 213         if (card)
 214                 snd_card_free(card);
 215         return ret;
 216 }
 217
 218 static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
 219 {
 220         struct snd_card *card = platform_get_drvdata(dev);
 221
 222         if (card) {
 223                 snd_card_free(card);
 224                 platform_set_drvdata(dev, NULL);
 225                 pxa2xx_ac97_hw_remove(dev);
 226         }
 227
 228         return 0;
 229 }
 230
 231 static struct platform_driver pxa2xx_ac97_driver = {
 232         .probe          = pxa2xx_ac97_probe,
 233         .remove         = __devexit_p(pxa2xx_ac97_remove),
 234         .suspend        = pxa2xx_ac97_suspend,
 235         .resume         = pxa2xx_ac97_resume,
 236         .driver         = {
 237                 .name   = "pxa2xx-ac97",
 238                 .owner  = THIS_MODULE,
 239         },
 240 };
 241
 242 static int __init pxa2xx_ac97_init(void)
 243 {
 244         return platform_driver_register(&pxa2xx_ac97_driver);
 245 }
 246
 247 static void __exit pxa2xx_ac97_exit(void)
 248 {
 249         platform_driver_unregister(&pxa2xx_ac97_driver);
 250 }
 251
 252 module_init(pxa2xx_ac97_init);
 253 module_exit(pxa2xx_ac97_exit);
 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");