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