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;
20 struct snd_soc_dapm_widget;
21 struct snd_compr_stream;
24 * DAI hardware audio formats.
26 * Describes the physical PCM data formating and clocking. Add new formats
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 */
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
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.
47 #define SND_SOC_DAIFMT_CONT (1 << 4) /* continuous clock */
48 #define SND_SOC_DAIFMT_GATED (2 << 4) /* clock is gated */
51 * DAI hardware signal inversions.
53 * Specifies whether the DAI can also support inverted clocks for the specified
56 #define SND_SOC_DAIFMT_NB_NF (1 << 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 */
62 * DAI hardware clock masters.
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.
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 */
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
79 * Master Clock Directions
81 #define SND_SOC_CLOCK_IN 0
82 #define SND_SOC_CLOCK_OUT 1
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)
94 struct snd_soc_dai_driver;
96 struct snd_ac97_bus_ops;
98 /* Digital Audio Interface registration */
99 int snd_soc_register_dai(struct device *dev,
100 struct snd_soc_dai_driver *dai_drv);
101 void snd_soc_unregister_dai(struct device *dev);
102 int snd_soc_register_dais(struct device *dev,
103 struct snd_soc_dai_driver *dai_drv, size_t count);
104 void snd_soc_unregister_dais(struct device *dev, size_t count);
106 /* Digital Audio Interface clocking API.*/
107 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
108 unsigned int freq, int dir);
110 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
111 int div_id, int div);
113 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
114 int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
116 /* Digital Audio interface formatting */
117 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
119 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
120 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
122 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
123 unsigned int tx_num, unsigned int *tx_slot,
124 unsigned int rx_num, unsigned int *rx_slot);
126 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
128 /* Digital Audio Interface mute */
129 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
131 struct snd_soc_dai_ops {
133 * DAI clocking configuration, all optional.
134 * Called by soc_card drivers, normally in their hw_params.
136 int (*set_sysclk)(struct snd_soc_dai *dai,
137 int clk_id, unsigned int freq, int dir);
138 int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
139 unsigned int freq_in, unsigned int freq_out);
140 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
143 * DAI format configuration
144 * Called by soc_card drivers, normally in their hw_params.
146 int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
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);
156 * DAI digital mute - optional.
157 * Called by soc-core to minimise any pops.
159 int (*digital_mute)(struct snd_soc_dai *dai, int mute);
162 * ALSA PCM audio operations - all optional.
163 * Called by soc-core during audio PCM operations.
165 int (*startup)(struct snd_pcm_substream *,
166 struct snd_soc_dai *);
167 void (*shutdown)(struct snd_pcm_substream *,
168 struct snd_soc_dai *);
169 int (*hw_params)(struct snd_pcm_substream *,
170 struct snd_pcm_hw_params *, struct snd_soc_dai *);
171 int (*hw_free)(struct snd_pcm_substream *,
172 struct snd_soc_dai *);
173 int (*prepare)(struct snd_pcm_substream *,
174 struct snd_soc_dai *);
175 int (*trigger)(struct snd_pcm_substream *, int,
176 struct snd_soc_dai *);
177 int (*bespoke_trigger)(struct snd_pcm_substream *, int,
178 struct snd_soc_dai *);
180 * For hardware based FIFO caused delay reporting.
183 snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
184 struct snd_soc_dai *);
188 * Digital Audio Interface Driver.
190 * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
191 * operations and capabilities. Codec and platform drivers will register this
192 * structure for every DAI they have.
194 * This structure covers the clocking, formating and ALSA operations for each
197 struct snd_soc_dai_driver {
198 /* DAI description */
204 /* DAI driver callbacks */
205 int (*probe)(struct snd_soc_dai *dai);
206 int (*remove)(struct snd_soc_dai *dai);
207 int (*suspend)(struct snd_soc_dai *dai);
208 int (*resume)(struct snd_soc_dai *dai);
213 const struct snd_soc_dai_ops *ops;
215 /* DAI capabilities */
216 struct snd_soc_pcm_stream capture;
217 struct snd_soc_pcm_stream playback;
218 unsigned int symmetric_rates:1;
220 /* probe ordering - for components with runtime dependencies */
226 * Digital Audio Interface runtime data.
228 * Holds runtime data for a DAI.
234 void *ac97_pdata; /* platform_data for the ac97 codec */
237 struct snd_soc_dai_driver *driver;
239 /* DAI runtime info */
240 unsigned int capture_active:1; /* stream is in use */
241 unsigned int playback_active:1; /* stream is in use */
242 unsigned int symmetric_rates:1;
243 struct snd_pcm_runtime *runtime;
245 unsigned char pop_wait:1;
246 unsigned char probed:1;
248 struct snd_soc_dapm_widget *playback_widget;
249 struct snd_soc_dapm_widget *capture_widget;
250 struct snd_soc_dapm_context dapm;
253 void *playback_dma_data;
254 void *capture_dma_data;
256 /* Symmetry data - only valid if symmetry is being enforced */
259 /* parent platform/codec */
260 struct snd_soc_platform *platform;
261 struct snd_soc_codec *codec;
263 struct snd_soc_card *card;
265 struct list_head list;
266 struct list_head card_list;
269 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
270 const struct snd_pcm_substream *ss)
272 return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
273 dai->playback_dma_data : dai->capture_dma_data;
276 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
277 const struct snd_pcm_substream *ss,
280 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
281 dai->playback_dma_data = data;
283 dai->capture_dma_data = data;
286 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
289 dev_set_drvdata(dai->dev, data);
292 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
294 return dev_get_drvdata(dai->dev);