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 hardware signal inversions.
50 * Specifies whether the DAI can also support inverted clocks for the specified
53 #define SND_SOC_DAIFMT_NB_NF (0 << 8) /* normal bit clock + frame */
54 #define SND_SOC_DAIFMT_NB_IF (1 << 8) /* normal bclk + inv frm */
55 #define SND_SOC_DAIFMT_IB_NF (2 << 8) /* invert bclk + nor frm */
56 #define SND_SOC_DAIFMT_IB_IF (3 << 8) /* invert bclk + frm */
59 * DAI hardware clock masters.
61 * This is wrt the codec, the inverse is true for the interface
62 * i.e. if the codec is clk and frm master then the interface is
63 * clk and frame slave.
65 #define SND_SOC_DAIFMT_CBM_CFM (0 << 12) /* codec clk & frm master */
66 #define SND_SOC_DAIFMT_CBS_CFM (1 << 12) /* codec clk slave & frm master */
67 #define SND_SOC_DAIFMT_CBM_CFS (2 << 12) /* codec clk master & frame slave */
68 #define SND_SOC_DAIFMT_CBS_CFS (3 << 12) /* codec clk & frm slave */
70 #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
71 #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
72 #define SND_SOC_DAIFMT_INV_MASK 0x0f00
73 #define SND_SOC_DAIFMT_MASTER_MASK 0xf000
76 * Master Clock Directions
78 #define SND_SOC_CLOCK_IN 0
79 #define SND_SOC_CLOCK_OUT 1
81 #define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S16_LE |\
82 SNDRV_PCM_FMTBIT_S32_LE |\
83 SNDRV_PCM_FMTBIT_S32_BE)
85 struct snd_soc_dai_ops;
87 struct snd_ac97_bus_ops;
89 /* Digital Audio Interface registration */
90 int snd_soc_register_dai(struct snd_soc_dai *dai);
91 void snd_soc_unregister_dai(struct snd_soc_dai *dai);
92 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count);
93 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count);
95 /* Digital Audio Interface clocking API.*/
96 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
97 unsigned int freq, int dir);
99 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
100 int div_id, int div);
102 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
103 int pll_id, unsigned int freq_in, unsigned int freq_out);
105 /* Digital Audio interface formatting */
106 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
108 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
109 unsigned int mask, int slots);
111 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
113 /* Digital Audio Interface mute */
114 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
117 * Digital Audio Interface.
119 * Describes the Digital Audio Interface in terms of it's ALSA, DAI and AC97
120 * operations an capabilities. Codec and platfom drivers will register a this
121 * structure for every DAI they have.
123 * This structure covers the clocking, formating and ALSA operations for each
126 struct snd_soc_dai_ops {
128 * DAI clocking configuration, all optional.
129 * Called by soc_card drivers, normally in their hw_params.
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,
134 int pll_id, unsigned int freq_in, unsigned int freq_out);
135 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
138 * DAI format configuration
139 * Called by soc_card drivers, normally in their hw_params.
141 int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
142 int (*set_tdm_slot)(struct snd_soc_dai *dai,
143 unsigned int mask, int slots);
144 int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
147 * DAI digital mute - optional.
148 * Called by soc-core to minimise any pops.
150 int (*digital_mute)(struct snd_soc_dai *dai, int mute);
153 * ALSA PCM audio operations - all optional.
154 * Called by soc-core during audio PCM operations.
156 int (*startup)(struct snd_pcm_substream *,
157 struct snd_soc_dai *);
158 void (*shutdown)(struct snd_pcm_substream *,
159 struct snd_soc_dai *);
160 int (*hw_params)(struct snd_pcm_substream *,
161 struct snd_pcm_hw_params *, struct snd_soc_dai *);
162 int (*hw_free)(struct snd_pcm_substream *,
163 struct snd_soc_dai *);
164 int (*prepare)(struct snd_pcm_substream *,
165 struct snd_soc_dai *);
166 int (*trigger)(struct snd_pcm_substream *, int,
167 struct snd_soc_dai *);
171 * Digital Audio Interface runtime data.
173 * Holds runtime data for a DAI.
176 /* DAI description */
184 int (*probe)(struct platform_device *pdev,
185 struct snd_soc_dai *dai);
186 void (*remove)(struct platform_device *pdev,
187 struct snd_soc_dai *dai);
188 int (*suspend)(struct snd_soc_dai *dai);
189 int (*resume)(struct snd_soc_dai *dai);
192 struct snd_soc_dai_ops *ops;
194 /* DAI capabilities */
195 struct snd_soc_pcm_stream capture;
196 struct snd_soc_pcm_stream playback;
197 unsigned int symmetric_rates:1;
199 /* DAI runtime info */
200 struct snd_pcm_runtime *runtime;
201 struct snd_soc_codec *codec;
203 unsigned char pop_wait:1;
206 /* DAI private data */
209 /* parent platform */
210 struct snd_soc_platform *platform;
212 struct list_head list;