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 */
34 /* left and right justified also known as MSB and LSB respectively */
35 #define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
36 #define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
41 * DAI bit clocks can be be gated (disabled) when not the DAI is not
42 * sending or receiving PCM data in a frame. This can be used to save power.
44 #define SND_SOC_DAIFMT_CONT (0 << 4) /* continuous clock */
45 #define SND_SOC_DAIFMT_GATED (1 << 4) /* clock is gated */
48 * DAI Left/Right Clocks.
50 * Specifies whether the DAI can support different samples for similtanious
51 * playback and capture. This usually requires a seperate physical frame
52 * clock for playback and capture.
54 #define SND_SOC_DAIFMT_SYNC (0 << 5) /* Tx FRM = Rx FRM */
55 #define SND_SOC_DAIFMT_ASYNC (1 << 5) /* Tx FRM ~ Rx FRM */
60 * Time Division Multiplexing. Allows PCM data to be multplexed with other
63 #define SND_SOC_DAIFMT_TDM (1 << 6)
66 * DAI hardware signal inversions.
68 * Specifies whether the DAI can also support inverted clocks for the specified
71 #define SND_SOC_DAIFMT_NB_NF (0 << 8) /* normal bit clock + frame */
72 #define SND_SOC_DAIFMT_NB_IF (1 << 8) /* normal bclk + inv frm */
73 #define SND_SOC_DAIFMT_IB_NF (2 << 8) /* invert bclk + nor frm */
74 #define SND_SOC_DAIFMT_IB_IF (3 << 8) /* invert bclk + frm */
77 * DAI hardware clock masters.
79 * This is wrt the codec, the inverse is true for the interface
80 * i.e. if the codec is clk and frm master then the interface is
81 * clk and frame slave.
83 #define SND_SOC_DAIFMT_CBM_CFM (0 << 12) /* codec clk & frm master */
84 #define SND_SOC_DAIFMT_CBS_CFM (1 << 12) /* codec clk slave & frm master */
85 #define SND_SOC_DAIFMT_CBM_CFS (2 << 12) /* codec clk master & frame slave */
86 #define SND_SOC_DAIFMT_CBS_CFS (3 << 12) /* codec clk & frm slave */
88 #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
89 #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
90 #define SND_SOC_DAIFMT_INV_MASK 0x0f00
91 #define SND_SOC_DAIFMT_MASTER_MASK 0xf000
94 * Master Clock Directions
96 #define SND_SOC_CLOCK_IN 0
97 #define SND_SOC_CLOCK_OUT 1
99 struct snd_soc_dai_ops;
101 struct snd_ac97_bus_ops;
103 /* Digital Audio Interface registration */
104 int snd_soc_register_dai(struct snd_soc_dai *dai);
105 void snd_soc_unregister_dai(struct snd_soc_dai *dai);
106 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count);
107 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count);
109 /* Digital Audio Interface clocking API.*/
110 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
111 unsigned int freq, int dir);
113 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
114 int div_id, int div);
116 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
117 int pll_id, unsigned int freq_in, unsigned int freq_out);
119 /* Digital Audio interface formatting */
120 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
122 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
123 unsigned int mask, int slots);
125 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
127 /* Digital Audio Interface mute */
128 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
131 * Digital Audio Interface.
133 * Describes the Digital Audio Interface in terms of it's ALSA, DAI and AC97
134 * operations an capabilities. Codec and platfom drivers will register a this
135 * structure for every DAI they have.
137 * This structure covers the clocking, formating and ALSA operations for each
140 struct snd_soc_dai_ops {
142 * DAI clocking configuration, all optional.
143 * Called by soc_card drivers, normally in their hw_params.
145 int (*set_sysclk)(struct snd_soc_dai *dai,
146 int clk_id, unsigned int freq, int dir);
147 int (*set_pll)(struct snd_soc_dai *dai,
148 int pll_id, unsigned int freq_in, unsigned int freq_out);
149 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
152 * DAI format configuration
153 * Called by soc_card drivers, normally in their hw_params.
155 int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
156 int (*set_tdm_slot)(struct snd_soc_dai *dai,
157 unsigned int mask, int slots);
158 int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
161 * DAI digital mute - optional.
162 * Called by soc-core to minimise any pops.
164 int (*digital_mute)(struct snd_soc_dai *dai, int mute);
167 * ALSA PCM audio operations - all optional.
168 * Called by soc-core during audio PCM operations.
170 int (*startup)(struct snd_pcm_substream *,
171 struct snd_soc_dai *);
172 void (*shutdown)(struct snd_pcm_substream *,
173 struct snd_soc_dai *);
174 int (*hw_params)(struct snd_pcm_substream *,
175 struct snd_pcm_hw_params *, struct snd_soc_dai *);
176 int (*hw_free)(struct snd_pcm_substream *,
177 struct snd_soc_dai *);
178 int (*prepare)(struct snd_pcm_substream *,
179 struct snd_soc_dai *);
180 int (*trigger)(struct snd_pcm_substream *, int,
181 struct snd_soc_dai *);
185 * Digital Audio Interface runtime data.
187 * Holds runtime data for a DAI.
190 /* DAI description */
198 int (*probe)(struct platform_device *pdev,
199 struct snd_soc_dai *dai);
200 void (*remove)(struct platform_device *pdev,
201 struct snd_soc_dai *dai);
202 int (*suspend)(struct snd_soc_dai *dai);
203 int (*resume)(struct snd_soc_dai *dai);
206 struct snd_soc_dai_ops *ops;
208 /* DAI capabilities */
209 struct snd_soc_pcm_stream capture;
210 struct snd_soc_pcm_stream playback;
212 /* DAI runtime info */
213 struct snd_pcm_runtime *runtime;
214 struct snd_soc_codec *codec;
216 unsigned char pop_wait:1;
219 /* DAI private data */
222 /* parent codec/platform */
224 struct snd_soc_codec *codec;
225 struct snd_soc_platform *platform;
228 struct list_head list;