include/sound/soc-dai.h

   1 /*
   2  * linux/sound/soc-dai.h -- ALSA SoC Layer
   3  *
   4  * Copyright:   2005-2008 Wolfson Microelectronics. PLC.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Digital Audio Interface (DAI) API.
  11  */
  12
  13 #ifndef __LINUX_SND_SOC_DAI_H
  14 #define __LINUX_SND_SOC_DAI_H
  15
  16
  17 #include <linux/list.h>
  18
  19 struct snd_pcm_substream;
  20 struct snd_soc_dapm_widget;
  21
  22 /*
  23  * DAI hardware audio formats.
  24  *
  25  * Describes the physical PCM data formating and clocking. Add new formats
  26  * to the end.
  27  */
  28 #define SND_SOC_DAIFMT_I2S              1 /* I2S mode */
  29 #define SND_SOC_DAIFMT_RIGHT_J          2 /* Right Justified mode */
  30 #define SND_SOC_DAIFMT_LEFT_J           3 /* Left Justified mode */
  31 #define SND_SOC_DAIFMT_DSP_A            4 /* L data MSB after FRM LRC */
  32 #define SND_SOC_DAIFMT_DSP_B            5 /* L data MSB during FRM LRC */
  33 #define SND_SOC_DAIFMT_AC97             6 /* AC97 */
  34 #define SND_SOC_DAIFMT_PDM              7 /* Pulse density modulation */
  35
  36 /* left and right justified also known as MSB and LSB respectively */
  37 #define SND_SOC_DAIFMT_MSB              SND_SOC_DAIFMT_LEFT_J
  38 #define SND_SOC_DAIFMT_LSB              SND_SOC_DAIFMT_RIGHT_J
  39
  40 /*
  41  * DAI Clock gating.
  42  *
  43  * DAI bit clocks can be be gated (disabled) when the DAI is not
  44  * sending or receiving PCM data in a frame. This can be used to save power.
  45  */
  46 #define SND_SOC_DAIFMT_CONT             (1 << 4) /* continuous clock */
  47 #define SND_SOC_DAIFMT_GATED            (2 << 4) /* clock is gated */
  48
  49 /*
  50  * DAI hardware signal inversions.
  51  *
  52  * Specifies whether the DAI can also support inverted clocks for the specified
  53  * format.
  54  */
  55 #define SND_SOC_DAIFMT_NB_NF            (1 << 8) /* normal bit clock + frame */
  56 #define SND_SOC_DAIFMT_NB_IF            (2 << 8) /* normal BCLK + inv FRM */
  57 #define SND_SOC_DAIFMT_IB_NF            (3 << 8) /* invert BCLK + nor FRM */
  58 #define SND_SOC_DAIFMT_IB_IF            (4 << 8) /* invert BCLK + FRM */
  59
  60 /*
  61  * DAI hardware clock masters.
  62  *
  63  * This is wrt the codec, the inverse is true for the interface
  64  * i.e. if the codec is clk and FRM master then the interface is
  65  * clk and frame slave.
  66  */
  67 #define SND_SOC_DAIFMT_CBM_CFM          (1 << 12) /* codec clk & FRM master */
  68 #define SND_SOC_DAIFMT_CBS_CFM          (2 << 12) /* codec clk slave & FRM master */
  69 #define SND_SOC_DAIFMT_CBM_CFS          (3 << 12) /* codec clk master & frame slave */
  70 #define SND_SOC_DAIFMT_CBS_CFS          (4 << 12) /* codec clk & FRM slave */
  71
  72 #define SND_SOC_DAIFMT_FORMAT_MASK      0x000f
  73 #define SND_SOC_DAIFMT_CLOCK_MASK       0x00f0
  74 #define SND_SOC_DAIFMT_INV_MASK         0x0f00
  75 #define SND_SOC_DAIFMT_MASTER_MASK      0xf000
  76
  77 /*
  78  * Master Clock Directions
  79  */
  80 #define SND_SOC_CLOCK_IN                0
  81 #define SND_SOC_CLOCK_OUT               1
  82
  83 #define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 |\
  84                                SNDRV_PCM_FMTBIT_S16_LE |\
  85                                SNDRV_PCM_FMTBIT_S16_BE |\
  86                                SNDRV_PCM_FMTBIT_S20_3LE |\
  87                                SNDRV_PCM_FMTBIT_S20_3BE |\
  88                                SNDRV_PCM_FMTBIT_S24_3LE |\
  89                                SNDRV_PCM_FMTBIT_S24_3BE |\
  90                                SNDRV_PCM_FMTBIT_S32_LE |\
  91                                SNDRV_PCM_FMTBIT_S32_BE)
  92
  93 struct snd_soc_dai_driver;
  94 struct snd_soc_dai;
  95 struct snd_ac97_bus_ops;
  96
  97 /* Digital Audio Interface registration */
  98 int snd_soc_register_dai(struct device *dev,
  99                 struct snd_soc_dai_driver *dai_drv);
 100 void snd_soc_unregister_dai(struct device *dev);
 101 int snd_soc_register_dais(struct device *dev,
 102                 struct snd_soc_dai_driver *dai_drv, size_t count);
 103 void snd_soc_unregister_dais(struct device *dev, size_t count);
 104
 105 /* Digital Audio Interface clocking API.*/
 106 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 107         unsigned int freq, int dir);
 108
 109 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
 110         int div_id, int div);
 111
 112 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
 113         int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
 114
 115 /* Digital Audio interface formatting */
 116 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 117
 118 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 119         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
 120
 121 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
 122         unsigned int tx_num, unsigned int *tx_slot,
 123         unsigned int rx_num, unsigned int *rx_slot);
 124
 125 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 126
 127 /* Digital Audio Interface mute */
 128 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
 129
 130 struct snd_soc_dai_ops {
 131         /*
 132          * DAI clocking configuration, all optional.
 133          * Called by soc_card drivers, normally in their hw_params.
 134          */
 135         int (*set_sysclk)(struct snd_soc_dai *dai,
 136                 int clk_id, unsigned int freq, int dir);
 137         int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
 138                 unsigned int freq_in, unsigned int freq_out);
 139         int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
 140
 141         /*
 142          * DAI format configuration
 143          * Called by soc_card drivers, normally in their hw_params.
 144          */
 145         int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
 146         int (*set_tdm_slot)(struct snd_soc_dai *dai,
 147                 unsigned int tx_mask, unsigned int rx_mask,
 148                 int slots, int slot_width);
 149         int (*set_channel_map)(struct snd_soc_dai *dai,
 150                 unsigned int tx_num, unsigned int *tx_slot,
 151                 unsigned int rx_num, unsigned int *rx_slot);
 152         int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
 153
 154         /*
 155          * DAI digital mute - optional.
 156          * Called by soc-core to minimise any pops.
 157          */
 158         int (*digital_mute)(struct snd_soc_dai *dai, int mute);
 159
 160         /*
 161          * ALSA PCM audio operations - all optional.
 162          * Called by soc-core during audio PCM operations.
 163          */
 164         int (*startup)(struct snd_pcm_substream *,
 165                 struct snd_soc_dai *);
 166         void (*shutdown)(struct snd_pcm_substream *,
 167                 struct snd_soc_dai *);
 168         int (*hw_params)(struct snd_pcm_substream *,
 169                 struct snd_pcm_hw_params *, struct snd_soc_dai *);
 170         int (*hw_free)(struct snd_pcm_substream *,
 171                 struct snd_soc_dai *);
 172         int (*prepare)(struct snd_pcm_substream *,
 173                 struct snd_soc_dai *);
 174         int (*trigger)(struct snd_pcm_substream *, int,
 175                 struct snd_soc_dai *);
 176         /*
 177          * For hardware based FIFO caused delay reporting.
 178          * Optional.
 179          */
 180         snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
 181                 struct snd_soc_dai *);
 182 };
 183
 184 /*
 185  * Digital Audio Interface Driver.
 186  *
 187  * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
 188  * operations and capabilities. Codec and platform drivers will register this
 189  * structure for every DAI they have.
 190  *
 191  * This structure covers the clocking, formating and ALSA operations for each
 192  * interface.
 193  */
 194 struct snd_soc_dai_driver {
 195         /* DAI description */
 196         const char *name;
 197         unsigned int id;
 198         int ac97_control;
 199
 200         /* DAI driver callbacks */
 201         int (*probe)(struct snd_soc_dai *dai);
 202         int (*remove)(struct snd_soc_dai *dai);
 203         int (*suspend)(struct snd_soc_dai *dai);
 204         int (*resume)(struct snd_soc_dai *dai);
 205
 206         /* ops */
 207         const struct snd_soc_dai_ops *ops;
 208
 209         /* DAI capabilities */
 210         struct snd_soc_pcm_stream capture;
 211         struct snd_soc_pcm_stream playback;
 212         unsigned int symmetric_rates:1;
 213
 214         /* probe ordering - for components with runtime dependencies */
 215         int probe_order;
 216         int remove_order;
 217 };
 218
 219 /*
 220  * Digital Audio Interface runtime data.
 221  *
 222  * Holds runtime data for a DAI.
 223  */
 224 struct snd_soc_dai {
 225         const char *name;
 226         int id;
 227         struct device *dev;
 228         void *ac97_pdata;       /* platform_data for the ac97 codec */
 229
 230         /* driver ops */
 231         struct snd_soc_dai_driver *driver;
 232
 233         /* DAI runtime info */
 234         unsigned int capture_active:1;          /* stream is in use */
 235         unsigned int playback_active:1;         /* stream is in use */
 236         unsigned int symmetric_rates:1;
 237         struct snd_pcm_runtime *runtime;
 238         unsigned int active;
 239         unsigned char pop_wait:1;
 240         unsigned char probed:1;
 241
 242         struct snd_soc_dapm_widget *playback_widget;
 243         struct snd_soc_dapm_widget *capture_widget;
 244
 245         /* DAI DMA data */
 246         void *playback_dma_data;
 247         void *capture_dma_data;
 248
 249         /* Symmetry data - only valid if symmetry is being enforced */
 250         unsigned int rate;
 251
 252         /* parent platform/codec */
 253         struct snd_soc_platform *platform;
 254         struct snd_soc_codec *codec;
 255
 256         struct snd_soc_card *card;
 257
 258         struct list_head list;
 259         struct list_head card_list;
 260 };
 261
 262 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
 263                                              const struct snd_pcm_substream *ss)
 264 {
 265         return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 266                 dai->playback_dma_data : dai->capture_dma_data;
 267 }
 268
 269 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
 270                                             const struct snd_pcm_substream *ss,
 271                                             void *data)
 272 {
 273         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
 274                 dai->playback_dma_data = data;
 275         else
 276                 dai->capture_dma_data = data;
 277 }
 278
 279 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
 280                 void *data)
 281 {
 282         dev_set_drvdata(dai->dev, data);
 283 }
 284
 285 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
 286 {
 287         return dev_get_drvdata(dai->dev);
 288 }
 289
 290 #endif