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