sound/soc/pxa/pxa2xx-ac97.c

   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/io.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/dmaengine.h>
  18
  19 #include <sound/core.h>
  20 #include <sound/ac97_codec.h>
  21 #include <sound/soc.h>
  22 #include <sound/pxa2xx-lib.h>
  23 #include <sound/dmaengine_pcm.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/regs-ac97.h>
  27 #include <mach/audio.h>
  28
  29 #include "pxa2xx-ac97.h"
  30
  31 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
  32 {
  33         pxa2xx_ac97_try_warm_reset(ac97);
  34
  35         pxa2xx_ac97_finish_reset(ac97);
  36 }
  37
  38 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
  39 {
  40         pxa2xx_ac97_try_cold_reset(ac97);
  41
  42         pxa2xx_ac97_finish_reset(ac97);
  43 }
  44
  45 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  46         .read   = pxa2xx_ac97_read,
  47         .write  = pxa2xx_ac97_write,
  48         .warm_reset     = pxa2xx_ac97_warm_reset,
  49         .reset  = pxa2xx_ac97_cold_reset,
  50 };
  51
  52 static unsigned long pxa2xx_ac97_pcm_stereo_in_req = 12;
  53 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  54         .addr           = __PREG(PCDR),
  55         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  56         .maxburst       = 32,
  57         .filter_data    = &pxa2xx_ac97_pcm_stereo_in_req,
  58 };
  59
  60 static unsigned long pxa2xx_ac97_pcm_stereo_out_req = 11;
  61 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  62         .addr           = __PREG(PCDR),
  63         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  64         .maxburst       = 32,
  65         .filter_data    = &pxa2xx_ac97_pcm_stereo_out_req,
  66 };
  67
  68 static unsigned long pxa2xx_ac97_pcm_aux_mono_out_req = 10;
  69 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
  70         .addr           = __PREG(MODR),
  71         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  72         .maxburst       = 16,
  73         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_out_req,
  74 };
  75
  76 static unsigned long pxa2xx_ac97_pcm_aux_mono_in_req = 9;
  77 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
  78         .addr           = __PREG(MODR),
  79         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  80         .maxburst       = 16,
  81         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_in_req,
  82 };
  83
  84 static unsigned long pxa2xx_ac97_pcm_aux_mic_mono_req = 8;
  85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
  86         .addr           = __PREG(MCDR),
  87         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  88         .maxburst       = 16,
  89         .filter_data    = &pxa2xx_ac97_pcm_aux_mic_mono_req,
  90 };
  91
  92 #ifdef CONFIG_PM
  93 static int pxa2xx_ac97_suspend(struct snd_soc_dai *dai)
  94 {
  95         return pxa2xx_ac97_hw_suspend();
  96 }
  97
  98 static int pxa2xx_ac97_resume(struct snd_soc_dai *dai)
  99 {
 100         return pxa2xx_ac97_hw_resume();
 101 }
 102
 103 #else
 104 #define pxa2xx_ac97_suspend     NULL
 105 #define pxa2xx_ac97_resume      NULL
 106 #endif
 107
 108 static int pxa2xx_ac97_probe(struct snd_soc_dai *dai)
 109 {
 110         return pxa2xx_ac97_hw_probe(to_platform_device(dai->dev));
 111 }
 112
 113 static int pxa2xx_ac97_remove(struct snd_soc_dai *dai)
 114 {
 115         pxa2xx_ac97_hw_remove(to_platform_device(dai->dev));
 116         return 0;
 117 }
 118
 119 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
 120                                  struct snd_pcm_hw_params *params,
 121                                  struct snd_soc_dai *cpu_dai)
 122 {
 123         struct snd_dmaengine_dai_dma_data *dma_data;
 124
 125         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 126                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 127         else
 128                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 129
 130         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 131
 132         return 0;
 133 }
 134
 135 static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
 136                                      struct snd_pcm_hw_params *params,
 137                                      struct snd_soc_dai *cpu_dai)
 138 {
 139         struct snd_dmaengine_dai_dma_data *dma_data;
 140
 141         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 142                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 143         else
 144                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 145
 146         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 147
 148         return 0;
 149 }
 150
 151 static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
 152                                      struct snd_pcm_hw_params *params,
 153                                      struct snd_soc_dai *cpu_dai)
 154 {
 155         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 156                 return -ENODEV;
 157         else
 158                 snd_soc_dai_set_dma_data(cpu_dai, substream,
 159                                          &pxa2xx_ac97_pcm_mic_mono_in);
 160
 161         return 0;
 162 }
 163
 164 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 165                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 166                 SNDRV_PCM_RATE_48000)
 167
 168 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 169         .hw_params      = pxa2xx_ac97_hw_params,
 170 };
 171
 172 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 173         .hw_params      = pxa2xx_ac97_hw_aux_params,
 174 };
 175
 176 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 177         .hw_params      = pxa2xx_ac97_hw_mic_params,
 178 };
 179
 180 /*
 181  * There is only 1 physical AC97 interface for pxa2xx, but it
 182  * has extra fifo's that can be used for aux DACs and ADCs.
 183  */
 184 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 185 {
 186         .name = "pxa2xx-ac97",
 187         .ac97_control = 1,
 188         .probe = pxa2xx_ac97_probe,
 189         .remove = pxa2xx_ac97_remove,
 190         .suspend = pxa2xx_ac97_suspend,
 191         .resume = pxa2xx_ac97_resume,
 192         .playback = {
 193                 .stream_name = "AC97 Playback",
 194                 .channels_min = 2,
 195                 .channels_max = 2,
 196                 .rates = PXA2XX_AC97_RATES,
 197                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 198         .capture = {
 199                 .stream_name = "AC97 Capture",
 200                 .channels_min = 2,
 201                 .channels_max = 2,
 202                 .rates = PXA2XX_AC97_RATES,
 203                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 204         .ops = &pxa_ac97_hifi_dai_ops,
 205 },
 206 {
 207         .name = "pxa2xx-ac97-aux",
 208         .ac97_control = 1,
 209         .playback = {
 210                 .stream_name = "AC97 Aux Playback",
 211                 .channels_min = 1,
 212                 .channels_max = 1,
 213                 .rates = PXA2XX_AC97_RATES,
 214                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 215         .capture = {
 216                 .stream_name = "AC97 Aux Capture",
 217                 .channels_min = 1,
 218                 .channels_max = 1,
 219                 .rates = PXA2XX_AC97_RATES,
 220                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 221         .ops = &pxa_ac97_aux_dai_ops,
 222 },
 223 {
 224         .name = "pxa2xx-ac97-mic",
 225         .ac97_control = 1,
 226         .capture = {
 227                 .stream_name = "AC97 Mic Capture",
 228                 .channels_min = 1,
 229                 .channels_max = 1,
 230                 .rates = PXA2XX_AC97_RATES,
 231                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 232         .ops = &pxa_ac97_mic_dai_ops,
 233 },
 234 };
 235
 236 static const struct snd_soc_component_driver pxa_ac97_component = {
 237         .name           = "pxa-ac97",
 238 };
 239
 240 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 241 {
 242         int ret;
 243
 244         if (pdev->id != -1) {
 245                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 246                 return -ENXIO;
 247         }
 248
 249         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
 250         if (ret != 0)
 251                 return ret;
 252
 253         /* Punt most of the init to the SoC probe; we may need the machine
 254          * driver to do interesting things with the clocking to get us up
 255          * and running.
 256          */
 257         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
 258                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
 259 }
 260
 261 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
 262 {
 263         snd_soc_unregister_component(&pdev->dev);
 264         snd_soc_set_ac97_ops(NULL);
 265         return 0;
 266 }
 267
 268 static struct platform_driver pxa2xx_ac97_driver = {
 269         .probe          = pxa2xx_ac97_dev_probe,
 270         .remove         = pxa2xx_ac97_dev_remove,
 271         .driver         = {
 272                 .name   = "pxa2xx-ac97",
 273                 .owner  = THIS_MODULE,
 274         },
 275 };
 276
 277 module_platform_driver(pxa2xx_ac97_driver);
 278
 279 MODULE_AUTHOR("Nicolas Pitre");
 280 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 281 MODULE_LICENSE("GPL");