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 struct snd_compr_stream;
  22
  23 /*
  24  * DAI hardware audio formats.
  25  *
  26  * Describes the physical PCM data formating and clocking. Add new formats
  27  * to the end.
  28  */
  29 #define SND_SOC_DAIFMT_I2S              1 /* I2S mode */
  30 #define SND_SOC_DAIFMT_RIGHT_J          2 /* Right Justified mode */
  31 #define SND_SOC_DAIFMT_LEFT_J           3 /* Left Justified mode */
  32 #define SND_SOC_DAIFMT_DSP_A            4 /* L data MSB after FRM LRC */
  33 #define SND_SOC_DAIFMT_DSP_B            5 /* L data MSB during FRM LRC */
  34 #define SND_SOC_DAIFMT_AC97             6 /* AC97 */
  35 #define SND_SOC_DAIFMT_PDM              7 /* Pulse density modulation */
  36
  37 /* left and right justified also known as MSB and LSB respectively */
  38 #define SND_SOC_DAIFMT_MSB              SND_SOC_DAIFMT_LEFT_J
  39 #define SND_SOC_DAIFMT_LSB              SND_SOC_DAIFMT_RIGHT_J
  40
  41 /*
  42  * DAI Clock gating.
  43  *
  44  * DAI bit clocks can be be gated (disabled) when the DAI is not
  45  * sending or receiving PCM data in a frame. This can be used to save power.
  46  */
  47 #define SND_SOC_DAIFMT_CONT             (1 << 4) /* continuous clock */
  48 #define SND_SOC_DAIFMT_GATED            (0 << 4) /* clock is gated */
  49
  50 /*
  51  * DAI hardware signal inversions.
  52  *
  53  * Specifies whether the DAI can also support inverted clocks for the specified
  54  * format.
  55  */
  56 #define SND_SOC_DAIFMT_NB_NF            (0 << 8) /* normal bit clock + frame */
  57 #define SND_SOC_DAIFMT_NB_IF            (2 << 8) /* normal BCLK + inv FRM */
  58 #define SND_SOC_DAIFMT_IB_NF            (3 << 8) /* invert BCLK + nor FRM */
  59 #define SND_SOC_DAIFMT_IB_IF            (4 << 8) /* invert BCLK + FRM */
  60
  61 /*
  62  * DAI hardware clock masters.
  63  *
  64  * This is wrt the codec, the inverse is true for the interface
  65  * i.e. if the codec is clk and FRM master then the interface is
  66  * clk and frame slave.
  67  */
  68 #define SND_SOC_DAIFMT_CBM_CFM          (1 << 12) /* codec clk & FRM master */
  69 #define SND_SOC_DAIFMT_CBS_CFM          (2 << 12) /* codec clk slave & FRM master */
  70 #define SND_SOC_DAIFMT_CBM_CFS          (3 << 12) /* codec clk master & frame slave */
  71 #define SND_SOC_DAIFMT_CBS_CFS          (4 << 12) /* codec clk & FRM slave */
  72
  73 #define SND_SOC_DAIFMT_FORMAT_MASK      0x000f
  74 #define SND_SOC_DAIFMT_CLOCK_MASK       0x00f0
  75 #define SND_SOC_DAIFMT_INV_MASK         0x0f00
  76 #define SND_SOC_DAIFMT_MASTER_MASK      0xf000
  77
  78 /*
  79  * Master Clock Directions
  80  */
  81 #define SND_SOC_CLOCK_IN                0
  82 #define SND_SOC_CLOCK_OUT               1
  83
  84 #define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 |\
  85                                SNDRV_PCM_FMTBIT_S16_LE |\
  86                                SNDRV_PCM_FMTBIT_S16_BE |\
  87                                SNDRV_PCM_FMTBIT_S20_3LE |\
  88                                SNDRV_PCM_FMTBIT_S20_3BE |\
  89                                SNDRV_PCM_FMTBIT_S24_3LE |\
  90                                SNDRV_PCM_FMTBIT_S24_3BE |\
  91                                SNDRV_PCM_FMTBIT_S32_LE |\
  92                                SNDRV_PCM_FMTBIT_S32_BE)
  93
  94 struct snd_soc_dai_driver;
  95 struct snd_soc_dai;
  96 struct snd_ac97_bus_ops;
  97
  98 /* Digital Audio Interface clocking API.*/
  99 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 100         unsigned int freq, int dir);
 101
 102 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
 103         int div_id, int div);
 104
 105 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
 106         int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
 107
 108 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
 109
 110 /* Digital Audio interface formatting */
 111 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 112
 113 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 114         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
 115
 116 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
 117         unsigned int tx_num, unsigned int *tx_slot,
 118         unsigned int rx_num, unsigned int *rx_slot);
 119
 120 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 121
 122 /* Digital Audio Interface mute */
 123 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
 124                              int direction);
 125
 126 struct snd_soc_dai_ops {
 127         /*
 128          * DAI clocking configuration, all optional.
 129          * Called by soc_card drivers, normally in their hw_params.
 130          */
 131         int (*set_sysclk)(struct snd_soc_dai *dai,
 132                 int clk_id, unsigned int freq, int dir);
 133         int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
 134                 unsigned int freq_in, unsigned int freq_out);
 135         int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
 136         int (*set_bclk_ratio)(struct snd_soc_dai *dai, unsigned int ratio);
 137
 138         /*
 139          * DAI format configuration
 140          * Called by soc_card drivers, normally in their hw_params.
 141          */
 142         int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
 143         int (*set_tdm_slot)(struct snd_soc_dai *dai,
 144                 unsigned int tx_mask, unsigned int rx_mask,
 145                 int slots, int slot_width);
 146         int (*set_channel_map)(struct snd_soc_dai *dai,
 147                 unsigned int tx_num, unsigned int *tx_slot,
 148                 unsigned int rx_num, unsigned int *rx_slot);
 149         int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
 150
 151         /*
 152          * DAI digital mute - optional.
 153          * Called by soc-core to minimise any pops.
 154          */
 155         int (*digital_mute)(struct snd_soc_dai *dai, int mute);
 156         int (*mute_stream)(struct snd_soc_dai *dai, int mute, int stream);
 157
 158         /*
 159          * ALSA PCM audio operations - all optional.
 160          * Called by soc-core during audio PCM operations.
 161          */
 162         int (*startup)(struct snd_pcm_substream *,
 163                 struct snd_soc_dai *);
 164         void (*shutdown)(struct snd_pcm_substream *,
 165                 struct snd_soc_dai *);
 166         int (*hw_params)(struct snd_pcm_substream *,
 167                 struct snd_pcm_hw_params *, struct snd_soc_dai *);
 168         int (*hw_free)(struct snd_pcm_substream *,
 169                 struct snd_soc_dai *);
 170         int (*prepare)(struct snd_pcm_substream *,
 171                 struct snd_soc_dai *);
 172         /*
 173          * NOTE: Commands passed to the trigger function are not necessarily
 174          * compatible with the current state of the dai. For example this
 175          * sequence of commands is possible: START STOP STOP.
 176          * So do not unconditionally use refcounting functions in the trigger
 177          * function, e.g. clk_enable/disable.
 178          */
 179         int (*trigger)(struct snd_pcm_substream *, int,
 180                 struct snd_soc_dai *);
 181         int (*bespoke_trigger)(struct snd_pcm_substream *, int,
 182                 struct snd_soc_dai *);
 183         /*
 184          * For hardware based FIFO caused delay reporting.
 185          * Optional.
 186          */
 187         snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
 188                 struct snd_soc_dai *);
 189 };
 190
 191 /*
 192  * Digital Audio Interface Driver.
 193  *
 194  * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
 195  * operations and capabilities. Codec and platform drivers will register this
 196  * structure for every DAI they have.
 197  *
 198  * This structure covers the clocking, formating and ALSA operations for each
 199  * interface.
 200  */
 201 struct snd_soc_dai_driver {
 202         /* DAI description */
 203         const char *name;
 204         unsigned int id;
 205         int ac97_control;
 206         unsigned int base;
 207
 208         /* DAI driver callbacks */
 209         int (*probe)(struct snd_soc_dai *dai);
 210         int (*remove)(struct snd_soc_dai *dai);
 211         int (*suspend)(struct snd_soc_dai *dai);
 212         int (*resume)(struct snd_soc_dai *dai);
 213         /* compress dai */
 214         bool compress_dai;
 215
 216         /* ops */
 217         const struct snd_soc_dai_ops *ops;
 218
 219         /* DAI capabilities */
 220         struct snd_soc_pcm_stream capture;
 221         struct snd_soc_pcm_stream playback;
 222         unsigned int symmetric_rates:1;
 223
 224         /* probe ordering - for components with runtime dependencies */
 225         int probe_order;
 226         int remove_order;
 227 };
 228
 229 /*
 230  * Digital Audio Interface runtime data.
 231  *
 232  * Holds runtime data for a DAI.
 233  */
 234 struct snd_soc_dai {
 235         const char *name;
 236         int id;
 237         struct device *dev;
 238         void *ac97_pdata;       /* platform_data for the ac97 codec */
 239
 240         /* driver ops */
 241         struct snd_soc_dai_driver *driver;
 242
 243         /* DAI runtime info */
 244         unsigned int capture_active:1;          /* stream is in use */
 245         unsigned int playback_active:1;         /* stream is in use */
 246         unsigned int symmetric_rates:1;
 247         struct snd_pcm_runtime *runtime;
 248         unsigned int active;
 249         unsigned char probed:1;
 250
 251         struct snd_soc_dapm_widget *playback_widget;
 252         struct snd_soc_dapm_widget *capture_widget;
 253         struct snd_soc_dapm_context dapm;
 254
 255         /* DAI DMA data */
 256         void *playback_dma_data;
 257         void *capture_dma_data;
 258
 259         /* Symmetry data - only valid if symmetry is being enforced */
 260         unsigned int rate;
 261
 262         /* parent platform/codec */
 263         struct snd_soc_platform *platform;
 264         struct snd_soc_codec *codec;
 265
 266         struct snd_soc_card *card;
 267
 268         struct list_head list;
 269         struct list_head card_list;
 270 };
 271
 272 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
 273                                              const struct snd_pcm_substream *ss)
 274 {
 275         return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 276                 dai->playback_dma_data : dai->capture_dma_data;
 277 }
 278
 279 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
 280                                             const struct snd_pcm_substream *ss,
 281                                             void *data)
 282 {
 283         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
 284                 dai->playback_dma_data = data;
 285         else
 286                 dai->capture_dma_data = data;
 287 }
 288
 289 static inline void snd_soc_dai_init_dma_data(struct snd_soc_dai *dai,
 290                                              void *playback, void *capture)
 291 {
 292         dai->playback_dma_data = playback;
 293         dai->capture_dma_data = capture;
 294 }
 295
 296 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
 297                 void *data)
 298 {
 299         dev_set_drvdata(dai->dev, data);
 300 }
 301
 302 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
 303 {
 304         return dev_get_drvdata(dai->dev);
 305 }
 306
 307 #endif