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 <mach/regs-ac97.h>
  25 #include <mach/audio.h>
  26
  27 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
  28 {
  29         if (!pxa2xx_ac97_try_cold_reset())
  30                 pxa2xx_ac97_try_warm_reset();
  31
  32         pxa2xx_ac97_finish_reset();
  33 }
  34
  35 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
  36                                               unsigned short reg)
  37 {
  38         int ret;
  39
  40         ret = pxa2xx_ac97_read(ac97->num, reg);
  41         if (ret < 0)
  42                 return 0;
  43         else
  44                 return (unsigned short)(ret & 0xffff);
  45 }
  46
  47 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
  48                                      unsigned short reg, unsigned short val)
  49 {
  50         int __always_unused ret;
  51
  52         ret = pxa2xx_ac97_write(ac97->num, reg, val);
  53 }
  54
  55 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  56         .read   = pxa2xx_ac97_legacy_read,
  57         .write  = pxa2xx_ac97_legacy_write,
  58         .reset  = pxa2xx_ac97_legacy_reset,
  59 };
  60
  61 static struct snd_pcm *pxa2xx_ac97_pcm;
  62 static struct snd_ac97 *pxa2xx_ac97_ac97;
  63
  64 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
  65 {
  66         struct snd_pcm_runtime *runtime = substream->runtime;
  67         pxa2xx_audio_ops_t *platform_ops;
  68         int ret, i;
  69
  70         ret = pxa2xx_pcm_open(substream);
  71         if (ret)
  72                 return ret;
  73
  74         runtime->hw.channels_min = 2;
  75         runtime->hw.channels_max = 2;
  76
  77         i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  78                 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
  79         runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
  80         snd_pcm_limit_hw_rates(runtime);
  81
  82         platform_ops = substream->pcm->card->dev->platform_data;
  83         if (platform_ops && platform_ops->startup) {
  84                 ret = platform_ops->startup(substream, platform_ops->priv);
  85                 if (ret < 0)
  86                         pxa2xx_pcm_close(substream);
  87         }
  88
  89         return ret;
  90 }
  91
  92 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
  93 {
  94         pxa2xx_audio_ops_t *platform_ops;
  95
  96         platform_ops = substream->pcm->card->dev->platform_data;
  97         if (platform_ops && platform_ops->shutdown)
  98                 platform_ops->shutdown(substream, platform_ops->priv);
  99
 100         return 0;
 101 }
 102
 103 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 104 {
 105         struct snd_pcm_runtime *runtime = substream->runtime;
 106         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 107                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 108         int ret;
 109
 110         ret = pxa2xx_pcm_prepare(substream);
 111         if (ret < 0)
 112                 return ret;
 113
 114         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 115 }
 116
 117 #ifdef CONFIG_PM_SLEEP
 118
 119 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 120 {
 121         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 122
 123         snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 124         snd_ac97_suspend(pxa2xx_ac97_ac97);
 125         if (platform_ops && platform_ops->suspend)
 126                 platform_ops->suspend(platform_ops->priv);
 127
 128         return pxa2xx_ac97_hw_suspend();
 129 }
 130
 131 static int pxa2xx_ac97_do_resume(struct snd_card *card)
 132 {
 133         pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 134         int rc;
 135
 136         rc = pxa2xx_ac97_hw_resume();
 137         if (rc)
 138                 return rc;
 139
 140         if (platform_ops && platform_ops->resume)
 141                 platform_ops->resume(platform_ops->priv);
 142         snd_ac97_resume(pxa2xx_ac97_ac97);
 143         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 144
 145         return 0;
 146 }
 147
 148 static int pxa2xx_ac97_suspend(struct device *dev)
 149 {
 150         struct snd_card *card = dev_get_drvdata(dev);
 151         int ret = 0;
 152
 153         if (card)
 154                 ret = pxa2xx_ac97_do_suspend(card);
 155
 156         return ret;
 157 }
 158
 159 static int pxa2xx_ac97_resume(struct device *dev)
 160 {
 161         struct snd_card *card = dev_get_drvdata(dev);
 162         int ret = 0;
 163
 164         if (card)
 165                 ret = pxa2xx_ac97_do_resume(card);
 166
 167         return ret;
 168 }
 169
 170 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 171 #endif
 172
 173 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
 174         .open           = pxa2xx_ac97_pcm_open,
 175         .close          = pxa2xx_ac97_pcm_close,
 176         .hw_params      = pxa2xx_pcm_hw_params,
 177         .hw_free        = pxa2xx_pcm_hw_free,
 178         .prepare        = pxa2xx_ac97_pcm_prepare,
 179         .trigger        = pxa2xx_pcm_trigger,
 180         .pointer        = pxa2xx_pcm_pointer,
 181         .mmap           = pxa2xx_pcm_mmap,
 182 };
 183
 184
 185 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
 186 {
 187         struct snd_pcm *pcm;
 188         int stream, ret;
 189
 190         ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
 191         if (ret)
 192                 goto out;
 193
 194         pcm->private_free = pxa2xx_pcm_free_dma_buffers;
 195
 196         ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 197         if (ret)
 198                 goto out;
 199
 200         stream = SNDRV_PCM_STREAM_PLAYBACK;
 201         snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
 202         ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
 203         if (ret)
 204                 goto out;
 205
 206         stream = SNDRV_PCM_STREAM_CAPTURE;
 207         snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
 208         ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
 209         if (ret)
 210                 goto out;
 211
 212         pxa2xx_ac97_pcm = pcm;
 213         ret = 0;
 214
 215  out:
 216         return ret;
 217 }
 218
 219 static int pxa2xx_ac97_probe(struct platform_device *dev)
 220 {
 221         struct snd_card *card;
 222         struct snd_ac97_bus *ac97_bus;
 223         struct snd_ac97_template ac97_template;
 224         int ret;
 225         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
 226
 227         if (dev->id >= 0) {
 228                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
 229                 ret = -ENXIO;
 230                 goto err_dev;
 231         }
 232
 233         ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 234                            THIS_MODULE, 0, &card);
 235         if (ret < 0)
 236                 goto err;
 237
 238         strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 239
 240         ret = pxa2xx_ac97_pcm_new(card);
 241         if (ret)
 242                 goto err;
 243
 244         ret = pxa2xx_ac97_hw_probe(dev);
 245         if (ret)
 246                 goto err;
 247
 248         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 249         if (ret)
 250                 goto err_remove;
 251         memset(&ac97_template, 0, sizeof(ac97_template));
 252         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 253         if (ret)
 254                 goto err_remove;
 255
 256         snprintf(card->shortname, sizeof(card->shortname),
 257                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 258         snprintf(card->longname, sizeof(card->longname),
 259                  "%s (%s)", dev->dev.driver->name, card->mixername);
 260
 261         if (pdata && pdata->codec_pdata[0])
 262                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 263         ret = snd_card_register(card);
 264         if (ret == 0) {
 265                 platform_set_drvdata(dev, card);
 266                 return 0;
 267         }
 268
 269 err_remove:
 270         pxa2xx_ac97_hw_remove(dev);
 271 err:
 272         if (card)
 273                 snd_card_free(card);
 274 err_dev:
 275         return ret;
 276 }
 277
 278 static int pxa2xx_ac97_remove(struct platform_device *dev)
 279 {
 280         struct snd_card *card = platform_get_drvdata(dev);
 281
 282         if (card) {
 283                 snd_card_free(card);
 284                 pxa2xx_ac97_hw_remove(dev);
 285         }
 286
 287         return 0;
 288 }
 289
 290 static struct platform_driver pxa2xx_ac97_driver = {
 291         .probe          = pxa2xx_ac97_probe,
 292         .remove         = pxa2xx_ac97_remove,
 293         .driver         = {
 294                 .name   = "pxa2xx-ac97",
 295 #ifdef CONFIG_PM_SLEEP
 296                 .pm     = &pxa2xx_ac97_pm_ops,
 297 #endif
 298         },
 299 };
 300
 301 module_platform_driver(pxa2xx_ac97_driver);
 302
 303 MODULE_AUTHOR("Nicolas Pitre");
 304 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 305 MODULE_LICENSE("GPL");
 306 MODULE_ALIAS("platform:pxa2xx-ac97");