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 pxad_param pxa2xx_ac97_pcm_stereo_in_req = {
  72         .prio = PXAD_PRIO_LOWEST,
  73         .drcmr = 11,
  74 };
  75
  76 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
  77         .addr           = __PREG(PCDR),
  78         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  79         .maxburst       = 32,
  80         .filter_data    = &pxa2xx_ac97_pcm_stereo_in_req,
  81 };
  82
  83 static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = {
  84         .prio = PXAD_PRIO_LOWEST,
  85         .drcmr = 12,
  86 };
  87
  88 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
  89         .addr           = __PREG(PCDR),
  90         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
  91         .maxburst       = 32,
  92         .filter_data    = &pxa2xx_ac97_pcm_stereo_out_req,
  93 };
  94
  95 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = {
  96         .prio = PXAD_PRIO_LOWEST,
  97         .drcmr = 10,
  98 };
  99 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
 100         .addr           = __PREG(MODR),
 101         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 102         .maxburst       = 16,
 103         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_out_req,
 104 };
 105
 106 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = {
 107         .prio = PXAD_PRIO_LOWEST,
 108         .drcmr = 9,
 109 };
 110 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
 111         .addr           = __PREG(MODR),
 112         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 113         .maxburst       = 16,
 114         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_in_req,
 115 };
 116
 117 static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = {
 118         .prio = PXAD_PRIO_LOWEST,
 119         .drcmr = 8,
 120 };
 121 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
 122         .addr           = __PREG(MCDR),
 123         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 124         .maxburst       = 16,
 125         .filter_data    = &pxa2xx_ac97_pcm_aux_mic_mono_req,
 126 };
 127
 128 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
 129                                     struct snd_soc_dai *cpu_dai)
 130 {
 131         struct snd_dmaengine_dai_dma_data *dma_data;
 132
 133         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 134                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
 135         else
 136                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
 137
 138         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 139
 140         return 0;
 141 }
 142
 143 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
 144                                    struct snd_soc_dai *cpu_dai)
 145 {
 146         struct snd_dmaengine_dai_dma_data *dma_data;
 147
 148         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 149                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
 150         else
 151                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
 152
 153         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 154
 155         return 0;
 156 }
 157
 158 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
 159                                    struct snd_soc_dai *cpu_dai)
 160 {
 161         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 162                 return -ENODEV;
 163         snd_soc_dai_set_dma_data(cpu_dai, substream,
 164                                  &pxa2xx_ac97_pcm_mic_mono_in);
 165
 166         return 0;
 167 }
 168
 169 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 170                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 171                 SNDRV_PCM_RATE_48000)
 172
 173 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
 174         .startup        = pxa2xx_ac97_hifi_startup,
 175 };
 176
 177 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
 178         .startup        = pxa2xx_ac97_aux_startup,
 179 };
 180
 181 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
 182         .startup        = pxa2xx_ac97_mic_startup,
 183 };
 184
 185 /*
 186  * There is only 1 physical AC97 interface for pxa2xx, but it
 187  * has extra fifo's that can be used for aux DACs and ADCs.
 188  */
 189 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 190 {
 191         .name = "pxa2xx-ac97",
 192         .bus_control = true,
 193         .playback = {
 194                 .stream_name = "AC97 Playback",
 195                 .channels_min = 2,
 196                 .channels_max = 2,
 197                 .rates = PXA2XX_AC97_RATES,
 198                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 199         .capture = {
 200                 .stream_name = "AC97 Capture",
 201                 .channels_min = 2,
 202                 .channels_max = 2,
 203                 .rates = PXA2XX_AC97_RATES,
 204                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 205         .ops = &pxa_ac97_hifi_dai_ops,
 206 },
 207 {
 208         .name = "pxa2xx-ac97-aux",
 209         .bus_control = true,
 210         .playback = {
 211                 .stream_name = "AC97 Aux Playback",
 212                 .channels_min = 1,
 213                 .channels_max = 1,
 214                 .rates = PXA2XX_AC97_RATES,
 215                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 216         .capture = {
 217                 .stream_name = "AC97 Aux Capture",
 218                 .channels_min = 1,
 219                 .channels_max = 1,
 220                 .rates = PXA2XX_AC97_RATES,
 221                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 222         .ops = &pxa_ac97_aux_dai_ops,
 223 },
 224 {
 225         .name = "pxa2xx-ac97-mic",
 226         .bus_control = true,
 227         .capture = {
 228                 .stream_name = "AC97 Mic Capture",
 229                 .channels_min = 1,
 230                 .channels_max = 1,
 231                 .rates = PXA2XX_AC97_RATES,
 232                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 233         .ops = &pxa_ac97_mic_dai_ops,
 234 },
 235 };
 236
 237 static const struct snd_soc_component_driver pxa_ac97_component = {
 238         .name           = "pxa-ac97",
 239 };
 240
 241 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 242 {
 243         int ret;
 244
 245         if (pdev->id != -1) {
 246                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
 247                 return -ENXIO;
 248         }
 249
 250         ret = pxa2xx_ac97_hw_probe(pdev);
 251         if (ret) {
 252                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
 253                 return ret;
 254         }
 255
 256         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
 257         if (ret != 0)
 258                 return ret;
 259
 260         /* Punt most of the init to the SoC probe; we may need the machine
 261          * driver to do interesting things with the clocking to get us up
 262          * and running.
 263          */
 264         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
 265                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
 266 }
 267
 268 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
 269 {
 270         snd_soc_unregister_component(&pdev->dev);
 271         snd_soc_set_ac97_ops(NULL);
 272         pxa2xx_ac97_hw_remove(pdev);
 273         return 0;
 274 }
 275
 276 #ifdef CONFIG_PM_SLEEP
 277 static int pxa2xx_ac97_dev_suspend(struct device *dev)
 278 {
 279         return pxa2xx_ac97_hw_suspend();
 280 }
 281
 282 static int pxa2xx_ac97_dev_resume(struct device *dev)
 283 {
 284         return pxa2xx_ac97_hw_resume();
 285 }
 286
 287 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
 288                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
 289 #endif
 290
 291 static struct platform_driver pxa2xx_ac97_driver = {
 292         .probe          = pxa2xx_ac97_dev_probe,
 293         .remove         = pxa2xx_ac97_dev_remove,
 294         .driver         = {
 295                 .name   = "pxa2xx-ac97",
 296 #ifdef CONFIG_PM_SLEEP
 297                 .pm     = &pxa2xx_ac97_pm_ops,
 298 #endif
 299         },
 300 };
 301
 302 module_platform_driver(pxa2xx_ac97_driver);
 303
 304 MODULE_AUTHOR("Nicolas Pitre");
 305 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 306 MODULE_LICENSE("GPL");
 307 MODULE_ALIAS("platform:pxa2xx-ac97");