2 * linux/sound/soc-dai.h -- ALSA SoC Layer
4 * Copyright: 2005-2008 Wolfson Microelectronics. PLC.
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.
10 * Digital Audio Interface (DAI) API.
13 #ifndef __LINUX_SND_SOC_DAI_H
14 #define __LINUX_SND_SOC_DAI_H
17 #include <linux/list.h>
19 struct snd_pcm_substream;
22 * DAI hardware audio formats.
24 * Describes the physical PCM data formating and clocking. Add new formats
27 #define SND_SOC_DAIFMT_I2S 0 /* I2S mode */
28 #define SND_SOC_DAIFMT_RIGHT_J 1 /* Right Justified mode */
29 #define SND_SOC_DAIFMT_LEFT_J 2 /* Left Justified mode */
30 #define SND_SOC_DAIFMT_DSP_A 3 /* L data MSB after FRM LRC */
31 #define SND_SOC_DAIFMT_DSP_B 4 /* L data MSB during FRM LRC */
32 #define SND_SOC_DAIFMT_AC97 5 /* AC97 */
33 #define SND_SOC_DAIFMT_PDM 6 /* Pulse density modulation */
35 /* left and right justified also known as MSB and LSB respectively */
36 #define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
37 #define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
42 * DAI bit clocks can be be gated (disabled) when the DAI is not
43 * sending or receiving PCM data in a frame. This can be used to save power.
45 #define SND_SOC_DAIFMT_CONT (0 << 4) /* continuous clock */
46 #define SND_SOC_DAIFMT_GATED (1 << 4) /* clock is gated */
49 * DAI hardware signal inversions.
51 * Specifies whether the DAI can also support inverted clocks for the specified
54 #define SND_SOC_DAIFMT_NB_NF (0 << 8) /* normal bit clock + frame */
55 #define SND_SOC_DAIFMT_NB_IF (1 << 8) /* normal BCLK + inv FRM */
56 #define SND_SOC_DAIFMT_IB_NF (2 << 8) /* invert BCLK + nor FRM */
57 #define SND_SOC_DAIFMT_IB_IF (3 << 8) /* invert BCLK + FRM */
60 * DAI hardware clock masters.
62 * This is wrt the codec, the inverse is true for the interface
63 * i.e. if the codec is clk and FRM master then the interface is
64 * clk and frame slave.
66 #define SND_SOC_DAIFMT_CBM_CFM (0 << 12) /* codec clk & FRM master */
67 #define SND_SOC_DAIFMT_CBS_CFM (1 << 12) /* codec clk slave & FRM master */
68 #define SND_SOC_DAIFMT_CBM_CFS (2 << 12) /* codec clk master & frame slave */
69 #define SND_SOC_DAIFMT_CBS_CFS (3 << 12) /* codec clk & FRM slave */
71 #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
72 #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
73 #define SND_SOC_DAIFMT_INV_MASK 0x0f00
74 #define SND_SOC_DAIFMT_MASTER_MASK 0xf000
77 * Master Clock Directions
79 #define SND_SOC_CLOCK_IN 0
80 #define SND_SOC_CLOCK_OUT 1
82 #define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 |\
83 SNDRV_PCM_FMTBIT_S16_LE |\
84 SNDRV_PCM_FMTBIT_S16_BE |\
85 SNDRV_PCM_FMTBIT_S20_3LE |\
86 SNDRV_PCM_FMTBIT_S20_3BE |\
87 SNDRV_PCM_FMTBIT_S24_3LE |\
88 SNDRV_PCM_FMTBIT_S24_3BE |\
89 SNDRV_PCM_FMTBIT_S32_LE |\
90 SNDRV_PCM_FMTBIT_S32_BE)
92 struct snd_soc_dai_driver;
94 struct snd_ac97_bus_ops;
96 /* Digital Audio Interface registration */
97 int snd_soc_register_dai(struct device *dev,
98 struct snd_soc_dai_driver *dai_drv);
99 void snd_soc_unregister_dai(struct device *dev);
100 int snd_soc_register_dais(struct device *dev,
101 struct snd_soc_dai_driver *dai_drv, size_t count);
102 void snd_soc_unregister_dais(struct device *dev, size_t count);
104 /* Digital Audio Interface clocking API.*/
105 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
106 unsigned int freq, int dir);
108 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
109 int div_id, int div);
111 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
112 int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
114 /* Digital Audio interface formatting */
115 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
117 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
118 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
120 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
121 unsigned int tx_num, unsigned int *tx_slot,
122 unsigned int rx_num, unsigned int *rx_slot);
124 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
126 /* Digital Audio Interface mute */
127 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
129 struct snd_soc_dai_ops {
131 * DAI clocking configuration, all optional.
132 * Called by soc_card drivers, normally in their hw_params.
134 int (*set_sysclk)(struct snd_soc_dai *dai,
135 int clk_id, unsigned int freq, int dir);
136 int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
137 unsigned int freq_in, unsigned int freq_out);
138 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
141 * DAI format configuration
142 * Called by soc_card drivers, normally in their hw_params.
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);
154 * DAI digital mute - optional.
155 * Called by soc-core to minimise any pops.
157 int (*digital_mute)(struct snd_soc_dai *dai, int mute);
160 * ALSA PCM audio operations - all optional.
161 * Called by soc-core during audio PCM operations.
163 int (*startup)(struct snd_pcm_substream *,
164 struct snd_soc_dai *);
165 void (*shutdown)(struct snd_pcm_substream *,
166 struct snd_soc_dai *);
167 int (*hw_params)(struct snd_pcm_substream *,
168 struct snd_pcm_hw_params *, struct snd_soc_dai *);
169 int (*hw_free)(struct snd_pcm_substream *,
170 struct snd_soc_dai *);
171 int (*prepare)(struct snd_pcm_substream *,
172 struct snd_soc_dai *);
173 int (*trigger)(struct snd_pcm_substream *, int,
174 struct snd_soc_dai *);
176 * For hardware based FIFO caused delay reporting.
179 snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
180 struct snd_soc_dai *);
184 * Digital Audio Interface Driver.
186 * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
187 * operations and capabilities. Codec and platform drivers will register this
188 * structure for every DAI they have.
190 * This structure covers the clocking, formating and ALSA operations for each
193 struct snd_soc_dai_driver {
194 /* DAI description */
199 /* DAI driver callbacks */
200 int (*probe)(struct snd_soc_dai *dai);
201 int (*remove)(struct snd_soc_dai *dai);
202 int (*suspend)(struct snd_soc_dai *dai);
203 int (*resume)(struct snd_soc_dai *dai);
206 const struct snd_soc_dai_ops *ops;
208 /* DAI capabilities */
209 struct snd_soc_pcm_stream capture;
210 struct snd_soc_pcm_stream playback;
211 unsigned int symmetric_rates:1;
215 * Digital Audio Interface runtime data.
217 * Holds runtime data for a DAI.
223 void *ac97_pdata; /* platform_data for the ac97 codec */
226 struct snd_soc_dai_driver *driver;
228 /* DAI runtime info */
229 unsigned int capture_active:1; /* stream is in use */
230 unsigned int playback_active:1; /* stream is in use */
231 unsigned int symmetric_rates:1;
232 struct snd_pcm_runtime *runtime;
234 unsigned char pop_wait:1;
235 unsigned char probed:1;
238 void *playback_dma_data;
239 void *capture_dma_data;
241 /* parent platform/codec */
243 struct snd_soc_platform *platform;
244 struct snd_soc_codec *codec;
246 struct snd_soc_card *card;
248 struct list_head list;
249 struct list_head card_list;
252 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
253 const struct snd_pcm_substream *ss)
255 return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
256 dai->playback_dma_data : dai->capture_dma_data;
259 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
260 const struct snd_pcm_substream *ss,
263 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
264 dai->playback_dma_data = data;
266 dai->capture_dma_data = data;
269 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
272 dev_set_drvdata(dai->dev, data);
275 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
277 return dev_get_drvdata(dai->dev);