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 int snd_soc_dai_is_dummy(struct snd_soc_dai *dai); 127 128 struct snd_soc_dai_ops { 129 /* 130 * DAI clocking configuration, all optional. 131 * Called by soc_card drivers, normally in their hw_params. 132 */ 133 int (*set_sysclk)(struct snd_soc_dai *dai, 134 int clk_id, unsigned int freq, int dir); 135 int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source, 136 unsigned int freq_in, unsigned int freq_out); 137 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div); 138 int (*set_bclk_ratio)(struct snd_soc_dai *dai, unsigned int ratio); 139 140 /* 141 * DAI format configuration 142 * Called by soc_card drivers, normally in their hw_params. 143 */ 144 int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt); 145 int (*xlate_tdm_slot_mask)(unsigned int slots, 146 unsigned int *tx_mask, unsigned int *rx_mask); 147 int (*set_tdm_slot)(struct snd_soc_dai *dai, 148 unsigned int tx_mask, unsigned int rx_mask, 149 int slots, int slot_width); 150 int (*set_channel_map)(struct snd_soc_dai *dai, 151 unsigned int tx_num, unsigned int *tx_slot, 152 unsigned int rx_num, unsigned int *rx_slot); 153 int (*set_tristate)(struct snd_soc_dai *dai, int tristate); 154 155 /* 156 * DAI digital mute - optional. 157 * Called by soc-core to minimise any pops. 158 */ 159 int (*digital_mute)(struct snd_soc_dai *dai, int mute); 160 int (*mute_stream)(struct snd_soc_dai *dai, int mute, int stream); 161 162 /* 163 * ALSA PCM audio operations - all optional. 164 * Called by soc-core during audio PCM operations. 165 */ 166 int (*startup)(struct snd_pcm_substream *, 167 struct snd_soc_dai *); 168 void (*shutdown)(struct snd_pcm_substream *, 169 struct snd_soc_dai *); 170 int (*hw_params)(struct snd_pcm_substream *, 171 struct snd_pcm_hw_params *, struct snd_soc_dai *); 172 int (*hw_free)(struct snd_pcm_substream *, 173 struct snd_soc_dai *); 174 int (*prepare)(struct snd_pcm_substream *, 175 struct snd_soc_dai *); 176 /* 177 * NOTE: Commands passed to the trigger function are not necessarily 178 * compatible with the current state of the dai. For example this 179 * sequence of commands is possible: START STOP STOP. 180 * So do not unconditionally use refcounting functions in the trigger 181 * function, e.g. clk_enable/disable. 182 */ 183 int (*trigger)(struct snd_pcm_substream *, int, 184 struct snd_soc_dai *); 185 int (*bespoke_trigger)(struct snd_pcm_substream *, int, 186 struct snd_soc_dai *); 187 /* 188 * For hardware based FIFO caused delay reporting. 189 * Optional. 190 */ 191 snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *, 192 struct snd_soc_dai *); 193 }; 194 195 /* 196 * Digital Audio Interface Driver. 197 * 198 * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97 199 * operations and capabilities. Codec and platform drivers will register this 200 * structure for every DAI they have. 201 * 202 * This structure covers the clocking, formating and ALSA operations for each 203 * interface. 204 */ 205 struct snd_soc_dai_driver { 206 /* DAI description */ 207 const char *name; 208 unsigned int id; 209 int ac97_control; 210 unsigned int base; 211 212 /* DAI driver callbacks */ 213 int (*probe)(struct snd_soc_dai *dai); 214 int (*remove)(struct snd_soc_dai *dai); 215 int (*suspend)(struct snd_soc_dai *dai); 216 int (*resume)(struct snd_soc_dai *dai); 217 /* compress dai */ 218 bool compress_dai; 219 220 /* ops */ 221 const struct snd_soc_dai_ops *ops; 222 223 /* DAI capabilities */ 224 struct snd_soc_pcm_stream capture; 225 struct snd_soc_pcm_stream playback; 226 unsigned int symmetric_rates:1; 227 unsigned int symmetric_channels:1; 228 unsigned int symmetric_samplebits:1; 229 230 /* probe ordering - for components with runtime dependencies */ 231 int probe_order; 232 int remove_order; 233 }; 234 235 /* 236 * Digital Audio Interface runtime data. 237 * 238 * Holds runtime data for a DAI. 239 */ 240 struct snd_soc_dai { 241 const char *name; 242 int id; 243 struct device *dev; 244 void *ac97_pdata; /* platform_data for the ac97 codec */ 245 246 /* driver ops */ 247 struct snd_soc_dai_driver *driver; 248 249 /* DAI runtime info */ 250 unsigned int capture_active:1; /* stream is in use */ 251 unsigned int playback_active:1; /* stream is in use */ 252 unsigned int symmetric_rates:1; 253 unsigned int symmetric_channels:1; 254 unsigned int symmetric_samplebits:1; 255 struct snd_pcm_runtime *runtime; 256 unsigned int active; 257 unsigned char probed:1; 258 259 struct snd_soc_dapm_widget *playback_widget; 260 struct snd_soc_dapm_widget *capture_widget; 261 struct snd_soc_dapm_context dapm; 262 263 /* DAI DMA data */ 264 void *playback_dma_data; 265 void *capture_dma_data; 266 267 /* Symmetry data - only valid if symmetry is being enforced */ 268 unsigned int rate; 269 unsigned int channels; 270 unsigned int sample_bits; 271 272 /* parent platform/codec */ 273 struct snd_soc_platform *platform; 274 struct snd_soc_codec *codec; 275 struct snd_soc_component *component; 276 277 struct snd_soc_card *card; 278 279 struct list_head list; 280 struct list_head card_list; 281 }; 282 283 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai, 284 const struct snd_pcm_substream *ss) 285 { 286 return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 287 dai->playback_dma_data : dai->capture_dma_data; 288 } 289 290 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai, 291 const struct snd_pcm_substream *ss, 292 void *data) 293 { 294 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) 295 dai->playback_dma_data = data; 296 else 297 dai->capture_dma_data = data; 298 } 299 300 static inline void snd_soc_dai_init_dma_data(struct snd_soc_dai *dai, 301 void *playback, void *capture) 302 { 303 dai->playback_dma_data = playback; 304 dai->capture_dma_data = capture; 305 } 306 307 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai, 308 void *data) 309 { 310 dev_set_drvdata(dai->dev, data); 311 } 312 313 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai) 314 { 315 return dev_get_drvdata(dai->dev); 316 } 317 318 #endif 319