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TOMOYO Linux Cross Reference
Linux/include/sound/soc-dai.h

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

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