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 #include <linux/dma/pxa-dma.h>
  19
  20 #include <sound/core.h>
  21 #include <sound/ac97_codec.h>
  22 #include <sound/soc.h>
  23 #include <sound/pxa2xx-lib.h>
  24 #include <sound/dmaengine_pcm.h>
  25
  26 #include <mach/hardware.h>
  27 #include <mach/regs-ac97.h>
  28 #include <mach/audio.h>
  29
  30 #include "pxa2xx-ac97.h"
  31
  32 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
  33 {
  34         pxa2xx_ac97_try_warm_reset(ac97);
  35
  36         pxa2xx_ac97_finish_reset(ac97);
  37 }
  38
  39 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
  40 {
  41         pxa2xx_ac97_try_cold_reset(ac97);
  42
  43         pxa2xx_ac97_finish_reset(ac97);
  44 }
  45
  46 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  47         .read   = pxa2xx_ac97_read,
  48         .write  = pxa2xx_ac97_write,
  49         .warm_reset     = pxa2xx_ac97_warm_reset,
  50         .reset  = pxa2xx_ac97_cold_reset,
  51 };
  52
  53 static struct pxad_param pxa2xx_ac97_pcm_stereo_in_req = {
  54         .prio = PXAD_PRIO_LOWEST,
  55         .drcmr = 11,
  56 };
  57
  58 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  59         .addr           = __PREG(PCDR),
  60         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  61         .maxburst       = 32,
  62         .filter_data    = &pxa2xx_ac97_pcm_stereo_in_req,
  63 };
  64
  65 static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = {
  66         .prio = PXAD_PRIO_LOWEST,
  67         .drcmr = 12,
  68 };
  69
  70 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  71         .addr           = __PREG(PCDR),
  72         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  73         .maxburst       = 32,
  74         .filter_data    = &pxa2xx_ac97_pcm_stereo_out_req,
  75 };
  76
  77 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = {
  78         .prio = PXAD_PRIO_LOWEST,
  79         .drcmr = 10,
  80 };
  81 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
  82         .addr           = __PREG(MODR),
  83         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  84         .maxburst       = 16,
  85         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_out_req,
  86 };
  87
  88 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = {
  89         .prio = PXAD_PRIO_LOWEST,
  90         .drcmr = 9,
  91 };
  92 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
  93         .addr           = __PREG(MODR),
  94         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  95         .maxburst       = 16,
  96         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_in_req,
  97 };
  98
  99 static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = {
 100         .prio = PXAD_PRIO_LOWEST,
 101         .drcmr = 8,
 102 };
 103 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
 104         .addr           = __PREG(MCDR),
 105         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 106         .maxburst       = 16,
 107         .filter_data    = &pxa2xx_ac97_pcm_aux_mic_mono_req,
 108 };
 109
 110 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
 111                                     struct snd_soc_dai *cpu_dai)
 112 {
 113         struct snd_dmaengine_dai_dma_data *dma_data;
 114
 115         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 116                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 117         else
 118                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 119
 120         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 121
 122         return 0;
 123 }
 124
 125 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
 126                                    struct snd_soc_dai *cpu_dai)
 127 {
 128         struct snd_dmaengine_dai_dma_data *dma_data;
 129
 130         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 131                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 132         else
 133                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 134
 135         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 136
 137         return 0;
 138 }
 139
 140 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
 141                                    struct snd_soc_dai *cpu_dai)
 142 {
 143         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 144                 return -ENODEV;
 145         else
 146                 snd_soc_dai_set_dma_data(cpu_dai, substream,
 147                                          &pxa2xx_ac97_pcm_mic_mono_in);
 148
 149         return 0;
 150 }
 151
 152 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 153                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 154                 SNDRV_PCM_RATE_48000)
 155
 156 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 157         .startup        = pxa2xx_ac97_hifi_startup,
 158 };
 159
 160 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 161         .startup        = pxa2xx_ac97_aux_startup,
 162 };
 163
 164 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 165         .startup        = pxa2xx_ac97_mic_startup,
 166 };
 167
 168 /*
 169  * There is only 1 physical AC97 interface for pxa2xx, but it
 170  * has extra fifo's that can be used for aux DACs and ADCs.
 171  */
 172 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 173 {
 174         .name = "pxa2xx-ac97",
 175         .bus_control = true,
 176         .playback = {
 177                 .stream_name = "AC97 Playback",
 178                 .channels_min = 2,
 179                 .channels_max = 2,
 180                 .rates = PXA2XX_AC97_RATES,
 181                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 182         .capture = {
 183                 .stream_name = "AC97 Capture",
 184                 .channels_min = 2,
 185                 .channels_max = 2,
 186                 .rates = PXA2XX_AC97_RATES,
 187                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 188         .ops = &pxa_ac97_hifi_dai_ops,
 189 },
 190 {
 191         .name = "pxa2xx-ac97-aux",
 192         .bus_control = true,
 193         .playback = {
 194                 .stream_name = "AC97 Aux Playback",
 195                 .channels_min = 1,
 196                 .channels_max = 1,
 197                 .rates = PXA2XX_AC97_RATES,
 198                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 199         .capture = {
 200                 .stream_name = "AC97 Aux Capture",
 201                 .channels_min = 1,
 202                 .channels_max = 1,
 203                 .rates = PXA2XX_AC97_RATES,
 204                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 205         .ops = &pxa_ac97_aux_dai_ops,
 206 },
 207 {
 208         .name = "pxa2xx-ac97-mic",
 209         .bus_control = true,
 210         .capture = {
 211                 .stream_name = "AC97 Mic Capture",
 212                 .channels_min = 1,
 213                 .channels_max = 1,
 214                 .rates = PXA2XX_AC97_RATES,
 215                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 216         .ops = &pxa_ac97_mic_dai_ops,
 217 },
 218 };
 219
 220 static const struct snd_soc_component_driver pxa_ac97_component = {
 221         .name           = "pxa-ac97",
 222 };
 223
 224 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 225 {
 226         int ret;
 227
 228         if (pdev->id != -1) {
 229                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 230                 return -ENXIO;
 231         }
 232
 233         ret = pxa2xx_ac97_hw_probe(pdev);
 234         if (ret) {
 235                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
 236                 return ret;
 237         }
 238
 239         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
 240         if (ret != 0)
 241                 return ret;
 242
 243         /* Punt most of the init to the SoC probe; we may need the machine
 244          * driver to do interesting things with the clocking to get us up
 245          * and running.
 246          */
 247         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
 248                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
 249 }
 250
 251 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
 252 {
 253         snd_soc_unregister_component(&pdev->dev);
 254         snd_soc_set_ac97_ops(NULL);
 255         pxa2xx_ac97_hw_remove(pdev);
 256         return 0;
 257 }
 258
 259 #ifdef CONFIG_PM_SLEEP
 260 static int pxa2xx_ac97_dev_suspend(struct device *dev)
 261 {
 262         return pxa2xx_ac97_hw_suspend();
 263 }
 264
 265 static int pxa2xx_ac97_dev_resume(struct device *dev)
 266 {
 267         return pxa2xx_ac97_hw_resume();
 268 }
 269
 270 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
 271                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
 272 #endif
 273
 274 static struct platform_driver pxa2xx_ac97_driver = {
 275         .probe          = pxa2xx_ac97_dev_probe,
 276         .remove         = pxa2xx_ac97_dev_remove,
 277         .driver         = {
 278                 .name   = "pxa2xx-ac97",
 279 #ifdef CONFIG_PM_SLEEP
 280                 .pm     = &pxa2xx_ac97_pm_ops,
 281 #endif
 282         },
 283 };
 284
 285 module_platform_driver(pxa2xx_ac97_driver);
 286
 287 MODULE_AUTHOR("Nicolas Pitre");
 288 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 289 MODULE_LICENSE("GPL");