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/ac97/controller.h>
  21 #include <sound/core.h>
  22 #include <sound/ac97_codec.h>
  23 #include <sound/soc.h>
  24 #include <sound/pxa2xx-lib.h>
  25 #include <sound/dmaengine_pcm.h>
  26
  27 #include <mach/hardware.h>
  28 #include <mach/regs-ac97.h>
  29 #include <mach/audio.h>
  30
  31 static void pxa2xx_ac97_warm_reset(struct ac97_controller *adrv)
  32 {
  33         pxa2xx_ac97_try_warm_reset();
  34
  35         pxa2xx_ac97_finish_reset();
  36 }
  37
  38 static void pxa2xx_ac97_cold_reset(struct ac97_controller *adrv)
  39 {
  40         pxa2xx_ac97_try_cold_reset();
  41
  42         pxa2xx_ac97_finish_reset();
  43 }
  44
  45 static int pxa2xx_ac97_read_actrl(struct ac97_controller *adrv, int slot,
  46                                   unsigned short reg)
  47 {
  48         return pxa2xx_ac97_read(slot, reg);
  49 }
  50
  51 static int pxa2xx_ac97_write_actrl(struct ac97_controller *adrv, int slot,
  52                                    unsigned short reg, unsigned short val)
  53 {
  54         return pxa2xx_ac97_write(slot, reg, val);
  55 }
  56
  57 static struct ac97_controller_ops pxa2xx_ac97_ops = {
  58         .read   = pxa2xx_ac97_read_actrl,
  59         .write  = pxa2xx_ac97_write_actrl,
  60         .warm_reset     = pxa2xx_ac97_warm_reset,
  61         .reset  = pxa2xx_ac97_cold_reset,
  62 };
  63
  64 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  65         .addr           = __PREG(PCDR),
  66         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  67         .chan_name      = "pcm_pcm_stereo_in",
  68         .maxburst       = 32,
  69 };
  70
  71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  72         .addr           = __PREG(PCDR),
  73         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  74         .chan_name      = "pcm_pcm_stereo_out",
  75         .maxburst       = 32,
  76 };
  77
  78 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
  79         .addr           = __PREG(MODR),
  80         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  81         .chan_name      = "pcm_aux_mono_out",
  82         .maxburst       = 16,
  83 };
  84
  85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
  86         .addr           = __PREG(MODR),
  87         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  88         .chan_name      = "pcm_aux_mono_in",
  89         .maxburst       = 16,
  90 };
  91
  92 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
  93         .addr           = __PREG(MCDR),
  94         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
  95         .chan_name      = "pcm_aux_mic_mono",
  96         .maxburst       = 16,
  97 };
  98
  99 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
 100                                     struct snd_soc_dai *cpu_dai)
 101 {
 102         struct snd_dmaengine_dai_dma_data *dma_data;
 103
 104         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 105                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 106         else
 107                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 108
 109         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 110
 111         return 0;
 112 }
 113
 114 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
 115                                    struct snd_soc_dai *cpu_dai)
 116 {
 117         struct snd_dmaengine_dai_dma_data *dma_data;
 118
 119         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 120                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 121         else
 122                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 123
 124         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 125
 126         return 0;
 127 }
 128
 129 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
 130                                    struct snd_soc_dai *cpu_dai)
 131 {
 132         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 133                 return -ENODEV;
 134         snd_soc_dai_set_dma_data(cpu_dai, substream,
 135                                  &pxa2xx_ac97_pcm_mic_mono_in);
 136
 137         return 0;
 138 }
 139
 140 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 141                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 142                 SNDRV_PCM_RATE_48000)
 143
 144 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 145         .startup        = pxa2xx_ac97_hifi_startup,
 146 };
 147
 148 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 149         .startup        = pxa2xx_ac97_aux_startup,
 150 };
 151
 152 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 153         .startup        = pxa2xx_ac97_mic_startup,
 154 };
 155
 156 /*
 157  * There is only 1 physical AC97 interface for pxa2xx, but it
 158  * has extra fifo's that can be used for aux DACs and ADCs.
 159  */
 160 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 161 {
 162         .name = "pxa2xx-ac97",
 163         .bus_control = true,
 164         .playback = {
 165                 .stream_name = "AC97 Playback",
 166                 .channels_min = 2,
 167                 .channels_max = 2,
 168                 .rates = PXA2XX_AC97_RATES,
 169                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 170         .capture = {
 171                 .stream_name = "AC97 Capture",
 172                 .channels_min = 2,
 173                 .channels_max = 2,
 174                 .rates = PXA2XX_AC97_RATES,
 175                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 176         .ops = &pxa_ac97_hifi_dai_ops,
 177 },
 178 {
 179         .name = "pxa2xx-ac97-aux",
 180         .bus_control = true,
 181         .playback = {
 182                 .stream_name = "AC97 Aux Playback",
 183                 .channels_min = 1,
 184                 .channels_max = 1,
 185                 .rates = PXA2XX_AC97_RATES,
 186                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 187         .capture = {
 188                 .stream_name = "AC97 Aux Capture",
 189                 .channels_min = 1,
 190                 .channels_max = 1,
 191                 .rates = PXA2XX_AC97_RATES,
 192                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 193         .ops = &pxa_ac97_aux_dai_ops,
 194 },
 195 {
 196         .name = "pxa2xx-ac97-mic",
 197         .bus_control = true,
 198         .capture = {
 199                 .stream_name = "AC97 Mic Capture",
 200                 .channels_min = 1,
 201                 .channels_max = 1,
 202                 .rates = PXA2XX_AC97_RATES,
 203                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 204         .ops = &pxa_ac97_mic_dai_ops,
 205 },
 206 };
 207
 208 static const struct snd_soc_component_driver pxa_ac97_component = {
 209         .name           = "pxa-ac97",
 210         .ops            = &pxa2xx_pcm_ops,
 211         .pcm_new        = pxa2xx_soc_pcm_new,
 212         .pcm_free       = pxa2xx_pcm_free_dma_buffers,
 213 };
 214
 215 #ifdef CONFIG_OF
 216 static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
 217         { .compatible = "marvell,pxa250-ac97", },
 218         { .compatible = "marvell,pxa270-ac97", },
 219         { .compatible = "marvell,pxa300-ac97", },
 220         { }
 221 };
 222 MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
 223
 224 #endif
 225
 226 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 227 {
 228         int ret;
 229         struct ac97_controller *ctrl;
 230         pxa2xx_audio_ops_t *pdata = pdev->dev.platform_data;
 231         void **codecs_pdata;
 232
 233         if (pdev->id != -1) {
 234                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 235                 return -ENXIO;
 236         }
 237
 238         ret = pxa2xx_ac97_hw_probe(pdev);
 239         if (ret) {
 240                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
 241                 return ret;
 242         }
 243
 244         codecs_pdata = pdata ? pdata->codec_pdata : NULL;
 245         ctrl = snd_ac97_controller_register(&pxa2xx_ac97_ops, &pdev->dev,
 246                                             AC97_SLOTS_AVAILABLE_ALL,
 247                                             codecs_pdata);
 248         if (IS_ERR(ctrl))
 249                 return PTR_ERR(ctrl);
 250
 251         platform_set_drvdata(pdev, ctrl);
 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         struct ac97_controller *ctrl = platform_get_drvdata(pdev);
 263
 264         snd_soc_unregister_component(&pdev->dev);
 265         snd_ac97_controller_unregister(ctrl);
 266         pxa2xx_ac97_hw_remove(pdev);
 267         return 0;
 268 }
 269
 270 #ifdef CONFIG_PM_SLEEP
 271 static int pxa2xx_ac97_dev_suspend(struct device *dev)
 272 {
 273         return pxa2xx_ac97_hw_suspend();
 274 }
 275
 276 static int pxa2xx_ac97_dev_resume(struct device *dev)
 277 {
 278         return pxa2xx_ac97_hw_resume();
 279 }
 280
 281 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
 282                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
 283 #endif
 284
 285 static struct platform_driver pxa2xx_ac97_driver = {
 286         .probe          = pxa2xx_ac97_dev_probe,
 287         .remove         = pxa2xx_ac97_dev_remove,
 288         .driver         = {
 289                 .name   = "pxa2xx-ac97",
 290 #ifdef CONFIG_PM_SLEEP
 291                 .pm     = &pxa2xx_ac97_pm_ops,
 292 #endif
 293                 .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
 294         },
 295 };
 296
 297 module_platform_driver(pxa2xx_ac97_driver);
 298
 299 MODULE_AUTHOR("Nicolas Pitre");
 300 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 301 MODULE_LICENSE("GPL");
 302 MODULE_ALIAS("platform:pxa2xx-ac97");