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