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 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
  93                                  struct snd_pcm_hw_params *params,
  94                                  struct snd_soc_dai *cpu_dai)
  95 {
  96         struct snd_dmaengine_dai_dma_data *dma_data;
  97
  98         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  99                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 100         else
 101                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 102
 103         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 104
 105         return 0;
 106 }
 107
 108 static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
 109                                      struct snd_pcm_hw_params *params,
 110                                      struct snd_soc_dai *cpu_dai)
 111 {
 112         struct snd_dmaengine_dai_dma_data *dma_data;
 113
 114         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 115                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 116         else
 117                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 118
 119         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 120
 121         return 0;
 122 }
 123
 124 static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
 125                                      struct snd_pcm_hw_params *params,
 126                                      struct snd_soc_dai *cpu_dai)
 127 {
 128         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 129                 return -ENODEV;
 130         else
 131                 snd_soc_dai_set_dma_data(cpu_dai, substream,
 132                                          &pxa2xx_ac97_pcm_mic_mono_in);
 133
 134         return 0;
 135 }
 136
 137 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 138                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 139                 SNDRV_PCM_RATE_48000)
 140
 141 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 142         .hw_params      = pxa2xx_ac97_hw_params,
 143 };
 144
 145 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 146         .hw_params      = pxa2xx_ac97_hw_aux_params,
 147 };
 148
 149 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 150         .hw_params      = pxa2xx_ac97_hw_mic_params,
 151 };
 152
 153 /*
 154  * There is only 1 physical AC97 interface for pxa2xx, but it
 155  * has extra fifo's that can be used for aux DACs and ADCs.
 156  */
 157 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 158 {
 159         .name = "pxa2xx-ac97",
 160         .bus_control = true,
 161         .playback = {
 162                 .stream_name = "AC97 Playback",
 163                 .channels_min = 2,
 164                 .channels_max = 2,
 165                 .rates = PXA2XX_AC97_RATES,
 166                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 167         .capture = {
 168                 .stream_name = "AC97 Capture",
 169                 .channels_min = 2,
 170                 .channels_max = 2,
 171                 .rates = PXA2XX_AC97_RATES,
 172                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 173         .ops = &pxa_ac97_hifi_dai_ops,
 174 },
 175 {
 176         .name = "pxa2xx-ac97-aux",
 177         .bus_control = true,
 178         .playback = {
 179                 .stream_name = "AC97 Aux Playback",
 180                 .channels_min = 1,
 181                 .channels_max = 1,
 182                 .rates = PXA2XX_AC97_RATES,
 183                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 184         .capture = {
 185                 .stream_name = "AC97 Aux Capture",
 186                 .channels_min = 1,
 187                 .channels_max = 1,
 188                 .rates = PXA2XX_AC97_RATES,
 189                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 190         .ops = &pxa_ac97_aux_dai_ops,
 191 },
 192 {
 193         .name = "pxa2xx-ac97-mic",
 194         .bus_control = true,
 195         .capture = {
 196                 .stream_name = "AC97 Mic Capture",
 197                 .channels_min = 1,
 198                 .channels_max = 1,
 199                 .rates = PXA2XX_AC97_RATES,
 200                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 201         .ops = &pxa_ac97_mic_dai_ops,
 202 },
 203 };
 204
 205 static const struct snd_soc_component_driver pxa_ac97_component = {
 206         .name           = "pxa-ac97",
 207 };
 208
 209 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 210 {
 211         int ret;
 212
 213         if (pdev->id != -1) {
 214                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 215                 return -ENXIO;
 216         }
 217
 218         ret = pxa2xx_ac97_hw_probe(pdev);
 219         if (ret) {
 220                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
 221                 return ret;
 222         }
 223
 224         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
 225         if (ret != 0)
 226                 return ret;
 227
 228         /* Punt most of the init to the SoC probe; we may need the machine
 229          * driver to do interesting things with the clocking to get us up
 230          * and running.
 231          */
 232         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
 233                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
 234 }
 235
 236 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
 237 {
 238         snd_soc_unregister_component(&pdev->dev);
 239         snd_soc_set_ac97_ops(NULL);
 240         pxa2xx_ac97_hw_remove(pdev);
 241         return 0;
 242 }
 243
 244 #ifdef CONFIG_PM_SLEEP
 245 static int pxa2xx_ac97_dev_suspend(struct device *dev)
 246 {
 247         return pxa2xx_ac97_hw_suspend();
 248 }
 249
 250 static int pxa2xx_ac97_dev_resume(struct device *dev)
 251 {
 252         return pxa2xx_ac97_hw_resume();
 253 }
 254
 255 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
 256                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
 257 #endif
 258
 259 static struct platform_driver pxa2xx_ac97_driver = {
 260         .probe          = pxa2xx_ac97_dev_probe,
 261         .remove         = pxa2xx_ac97_dev_remove,
 262         .driver         = {
 263                 .name   = "pxa2xx-ac97",
 264 #ifdef CONFIG_PM_SLEEP
 265                 .pm     = &pxa2xx_ac97_pm_ops,
 266 #endif
 267         },
 268 };
 269
 270 module_platform_driver(pxa2xx_ac97_driver);
 271
 272 MODULE_AUTHOR("Nicolas Pitre");
 273 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 274 MODULE_LICENSE("GPL");