sound/arm/pxa2xx-ac97.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
   4  *
   5  * Author:      Nicolas Pitre
   6  * Created:     Dec 02, 2004
   7  * Copyright:   MontaVista Software Inc.
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/io.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/dmaengine.h>
  15 #include <linux/dma-mapping.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 #include <sound/dmaengine_pcm.h>
  23
  24 #include <linux/platform_data/asoc-pxa.h>
  25
  26 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
  27 {
  28         if (!pxa2xx_ac97_try_cold_reset())
  29                 pxa2xx_ac97_try_warm_reset();
  30
  31         pxa2xx_ac97_finish_reset();
  32 }
  33
  34 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
  35                                               unsigned short reg)
  36 {
  37         int ret;
  38
  39         ret = pxa2xx_ac97_read(ac97->num, reg);
  40         if (ret < 0)
  41                 return 0;
  42         else
  43                 return (unsigned short)(ret & 0xffff);
  44 }
  45
  46 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
  47                                      unsigned short reg, unsigned short val)
  48 {
  49         pxa2xx_ac97_write(ac97->num, reg, val);
  50 }
  51
  52 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  53         .read   = pxa2xx_ac97_legacy_read,
  54         .write  = pxa2xx_ac97_legacy_write,
  55         .reset  = pxa2xx_ac97_legacy_reset,
  56 };
  57
  58 static struct snd_pcm *pxa2xx_ac97_pcm;
  59 static struct snd_ac97 *pxa2xx_ac97_ac97;
  60
  61 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
  62 {
  63         struct snd_pcm_runtime *runtime = substream->runtime;
  64         pxa2xx_audio_ops_t *platform_ops;
  65         int ret, i;
  66
  67         ret = pxa2xx_pcm_open(substream);
  68         if (ret)
  69                 return ret;
  70
  71         runtime->hw.channels_min = 2;
  72         runtime->hw.channels_max = 2;
  73
  74         i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  75                 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
  76         runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
  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                 ret = platform_ops->startup(substream, platform_ops->priv);
  82                 if (ret < 0)
  83                         pxa2xx_pcm_close(substream);
  84         }
  85
  86         return ret;
  87 }
  88
  89 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
  90 {
  91         pxa2xx_audio_ops_t *platform_ops;
  92
  93         platform_ops = substream->pcm->card->dev->platform_data;
  94         if (platform_ops && platform_ops->shutdown)
  95                 platform_ops->shutdown(substream, platform_ops->priv);
  96
  97         return 0;
  98 }
  99
 100 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 101 {
 102         struct snd_pcm_runtime *runtime = substream->runtime;
 103         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 104                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 105         int ret;
 106
 107         ret = pxa2xx_pcm_prepare(substream);
 108         if (ret < 0)
 109                 return ret;
 110
 111         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 112 }
 113
 114 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 115 {
 116         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 117
 118         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 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 DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 166
 167 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
 168         .open           = pxa2xx_ac97_pcm_open,
 169         .close          = pxa2xx_ac97_pcm_close,
 170         .hw_params      = pxa2xx_pcm_hw_params,
 171         .prepare        = pxa2xx_ac97_pcm_prepare,
 172         .trigger        = pxa2xx_pcm_trigger,
 173         .pointer        = pxa2xx_pcm_pointer,
 174 };
 175
 176
 177 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
 178 {
 179         struct snd_pcm *pcm;
 180         int ret;
 181
 182         ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
 183         if (ret)
 184                 goto out;
 185
 186         ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 187         if (ret)
 188                 goto out;
 189
 190         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops);
 191         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops);
 192         ret = pxa2xx_pcm_preallocate_dma_buffer(pcm);
 193         if (ret)
 194                 goto out;
 195
 196         pxa2xx_ac97_pcm = pcm;
 197         ret = 0;
 198
 199  out:
 200         return ret;
 201 }
 202
 203 static int pxa2xx_ac97_probe(struct platform_device *dev)
 204 {
 205         struct snd_card *card;
 206         struct snd_ac97_bus *ac97_bus;
 207         struct snd_ac97_template ac97_template;
 208         int ret;
 209         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
 210
 211         if (dev->id >= 0) {
 212                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
 213                 ret = -ENXIO;
 214                 goto err_dev;
 215         }
 216
 217         ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 218                            THIS_MODULE, 0, &card);
 219         if (ret < 0)
 220                 goto err;
 221
 222         strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 223
 224         ret = pxa2xx_ac97_pcm_new(card);
 225         if (ret)
 226                 goto err;
 227
 228         ret = pxa2xx_ac97_hw_probe(dev);
 229         if (ret)
 230                 goto err;
 231
 232         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 233         if (ret)
 234                 goto err_remove;
 235         memset(&ac97_template, 0, sizeof(ac97_template));
 236         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 237         if (ret)
 238                 goto err_remove;
 239
 240         snprintf(card->shortname, sizeof(card->shortname),
 241                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 242         snprintf(card->longname, sizeof(card->longname),
 243                  "%s (%s)", dev->dev.driver->name, card->mixername);
 244
 245         if (pdata && pdata->codec_pdata[0])
 246                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 247         ret = snd_card_register(card);
 248         if (ret == 0) {
 249                 platform_set_drvdata(dev, card);
 250                 return 0;
 251         }
 252
 253 err_remove:
 254         pxa2xx_ac97_hw_remove(dev);
 255 err:
 256         if (card)
 257                 snd_card_free(card);
 258 err_dev:
 259         return ret;
 260 }
 261
 262 static void pxa2xx_ac97_remove(struct platform_device *dev)
 263 {
 264         struct snd_card *card = platform_get_drvdata(dev);
 265
 266         if (card) {
 267                 snd_card_free(card);
 268                 pxa2xx_ac97_hw_remove(dev);
 269         }
 270 }
 271
 272 static struct platform_driver pxa2xx_ac97_driver = {
 273         .probe          = pxa2xx_ac97_probe,
 274         .remove_new     = pxa2xx_ac97_remove,
 275         .driver         = {
 276                 .name   = "pxa2xx-ac97",
 277                 .pm     = &pxa2xx_ac97_pm_ops,
 278         },
 279 };
 280
 281 module_platform_driver(pxa2xx_ac97_driver);
 282
 283 MODULE_AUTHOR("Nicolas Pitre");
 284 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 285 MODULE_LICENSE("GPL");
 286 MODULE_ALIAS("platform:pxa2xx-ac97");