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();
  33
  34         pxa2xx_ac97_finish_reset();
  35 }
  36
  37 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
  38 {
  39         pxa2xx_ac97_try_cold_reset();
  40
  41         pxa2xx_ac97_finish_reset();
  42 }
  43
  44 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
  45                                               unsigned short reg)
  46 {
  47         int ret;
  48
  49         ret = pxa2xx_ac97_read(ac97->num, reg);
  50         if (ret < 0)
  51                 return 0;
  52         else
  53                 return (unsigned short)(ret & 0xffff);
  54 }
  55
  56 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
  57                                      unsigned short reg, unsigned short val)
  58 {
  59         int ret;
  60
  61         ret = pxa2xx_ac97_write(ac97->num, reg, val);
  62 }
  63
  64 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
  65         .read   = pxa2xx_ac97_legacy_read,
  66         .write  = pxa2xx_ac97_legacy_write,
  67         .warm_reset     = pxa2xx_ac97_warm_reset,
  68         .reset  = pxa2xx_ac97_cold_reset,
  69 };
  70
  71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  72         .addr           = __PREG(PCDR),
  73         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  74         .chan_name      = "pcm_pcm_stereo_in",
  75         .maxburst       = 32,
  76 };
  77
  78 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  79         .addr           = __PREG(PCDR),
  80         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  81         .chan_name      = "pcm_pcm_stereo_out",
  82         .maxburst       = 32,
  83 };
  84
  85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
  86         .addr           = __PREG(MODR),
  87         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  88         .chan_name      = "pcm_aux_mono_out",
  89         .maxburst       = 16,
  90 };
  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         .chan_name      = "pcm_aux_mono_in",
  96         .maxburst       = 16,
  97 };
  98
  99 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
 100         .addr           = __PREG(MCDR),
 101         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 102         .chan_name      = "pcm_aux_mic_mono",
 103         .maxburst       = 16,
 104 };
 105
 106 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
 107                                     struct snd_soc_dai *cpu_dai)
 108 {
 109         struct snd_dmaengine_dai_dma_data *dma_data;
 110
 111         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 112                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 113         else
 114                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 115
 116         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 117
 118         return 0;
 119 }
 120
 121 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
 122                                    struct snd_soc_dai *cpu_dai)
 123 {
 124         struct snd_dmaengine_dai_dma_data *dma_data;
 125
 126         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 127                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 128         else
 129                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 130
 131         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 132
 133         return 0;
 134 }
 135
 136 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
 137                                    struct snd_soc_dai *cpu_dai)
 138 {
 139         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 140                 return -ENODEV;
 141         snd_soc_dai_set_dma_data(cpu_dai, substream,
 142                                  &pxa2xx_ac97_pcm_mic_mono_in);
 143
 144         return 0;
 145 }
 146
 147 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 148                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 149                 SNDRV_PCM_RATE_48000)
 150
 151 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 152         .startup        = pxa2xx_ac97_hifi_startup,
 153 };
 154
 155 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 156         .startup        = pxa2xx_ac97_aux_startup,
 157 };
 158
 159 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 160         .startup        = pxa2xx_ac97_mic_startup,
 161 };
 162
 163 /*
 164  * There is only 1 physical AC97 interface for pxa2xx, but it
 165  * has extra fifo's that can be used for aux DACs and ADCs.
 166  */
 167 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 168 {
 169         .name = "pxa2xx-ac97",
 170         .bus_control = true,
 171         .playback = {
 172                 .stream_name = "AC97 Playback",
 173                 .channels_min = 2,
 174                 .channels_max = 2,
 175                 .rates = PXA2XX_AC97_RATES,
 176                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 177         .capture = {
 178                 .stream_name = "AC97 Capture",
 179                 .channels_min = 2,
 180                 .channels_max = 2,
 181                 .rates = PXA2XX_AC97_RATES,
 182                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 183         .ops = &pxa_ac97_hifi_dai_ops,
 184 },
 185 {
 186         .name = "pxa2xx-ac97-aux",
 187         .bus_control = true,
 188         .playback = {
 189                 .stream_name = "AC97 Aux Playback",
 190                 .channels_min = 1,
 191                 .channels_max = 1,
 192                 .rates = PXA2XX_AC97_RATES,
 193                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 194         .capture = {
 195                 .stream_name = "AC97 Aux Capture",
 196                 .channels_min = 1,
 197                 .channels_max = 1,
 198                 .rates = PXA2XX_AC97_RATES,
 199                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 200         .ops = &pxa_ac97_aux_dai_ops,
 201 },
 202 {
 203         .name = "pxa2xx-ac97-mic",
 204         .bus_control = true,
 205         .capture = {
 206                 .stream_name = "AC97 Mic Capture",
 207                 .channels_min = 1,
 208                 .channels_max = 1,
 209                 .rates = PXA2XX_AC97_RATES,
 210                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 211         .ops = &pxa_ac97_mic_dai_ops,
 212 },
 213 };
 214
 215 static const struct snd_soc_component_driver pxa_ac97_component = {
 216         .name           = "pxa-ac97",
 217         .ops            = &pxa2xx_pcm_ops,
 218         .pcm_new        = pxa2xx_soc_pcm_new,
 219         .pcm_free       = pxa2xx_pcm_free_dma_buffers,
 220 };
 221
 222 #ifdef CONFIG_OF
 223 static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
 224         { .compatible = "marvell,pxa250-ac97", },
 225         { .compatible = "marvell,pxa270-ac97", },
 226         { .compatible = "marvell,pxa300-ac97", },
 227         { }
 228 };
 229 MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
 230
 231 #endif
 232
 233 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 234 {
 235         int ret;
 236
 237         if (pdev->id != -1) {
 238                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 239                 return -ENXIO;
 240         }
 241
 242         ret = pxa2xx_ac97_hw_probe(pdev);
 243         if (ret) {
 244                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
 245                 return ret;
 246         }
 247
 248         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
 249         if (ret != 0)
 250                 return ret;
 251
 252         /* Punt most of the init to the SoC probe; we may need the machine
 253          * driver to do interesting things with the clocking to get us up
 254          * and running.
 255          */
 256         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
 257                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
 258 }
 259
 260 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
 261 {
 262         snd_soc_unregister_component(&pdev->dev);
 263         snd_soc_set_ac97_ops(NULL);
 264         pxa2xx_ac97_hw_remove(pdev);
 265         return 0;
 266 }
 267
 268 #ifdef CONFIG_PM_SLEEP
 269 static int pxa2xx_ac97_dev_suspend(struct device *dev)
 270 {
 271         return pxa2xx_ac97_hw_suspend();
 272 }
 273
 274 static int pxa2xx_ac97_dev_resume(struct device *dev)
 275 {
 276         return pxa2xx_ac97_hw_resume();
 277 }
 278
 279 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
 280                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
 281 #endif
 282
 283 static struct platform_driver pxa2xx_ac97_driver = {
 284         .probe          = pxa2xx_ac97_dev_probe,
 285         .remove         = pxa2xx_ac97_dev_remove,
 286         .driver         = {
 287                 .name   = "pxa2xx-ac97",
 288 #ifdef CONFIG_PM_SLEEP
 289                 .pm     = &pxa2xx_ac97_pm_ops,
 290 #endif
 291                 .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
 292         },
 293 };
 294
 295 module_platform_driver(pxa2xx_ac97_driver);
 296
 297 MODULE_AUTHOR("Nicolas Pitre");
 298 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 299 MODULE_LICENSE("GPL");
 300 MODULE_ALIAS("platform:pxa2xx-ac97");