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
22 /*
23 * DAI hardware audio formats.
24 *
25 * Describes the physical PCM data formating and clocking. Add new formats
26 * to the end.
27 */
28 #define SND_SOC_DAIFMT_I2S 1 /* I2S mode */
29 #define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */
30 #define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */
31 #define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */
32 #define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */
33 #define SND_SOC_DAIFMT_AC97 6 /* AC97 */
34 #define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */
35
36 /* left and right justified also known as MSB and LSB respectively */
37 #define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
38 #define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
39
40 /*
41 * DAI Clock gating.
42 *
43 * DAI bit clocks can be be gated (disabled) when the DAI is not
44 * sending or receiving PCM data in a frame. This can be used to save power.
45 */
46 #define SND_SOC_DAIFMT_CONT (1 << 4) /* continuous clock */
47 #define SND_SOC_DAIFMT_GATED (2 << 4) /* clock is gated */
48
49 /*
50 * DAI hardware signal inversions.
51 *
52 * Specifies whether the DAI can also support inverted clocks for the specified
53 * format.
54 */
55 #define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
56 #define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
57 #define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */
58 #define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */
59
60 /*
61 * DAI hardware clock masters.
62 *
63 * This is wrt the codec, the inverse is true for the interface
64 * i.e. if the codec is clk and FRM master then the interface is
65 * clk and frame slave.
66 */
67 #define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */
68 #define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */
69 #define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */
70 #define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */
71
72 #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
73 #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
74 #define SND_SOC_DAIFMT_INV_MASK 0x0f00
75 #define SND_SOC_DAIFMT_MASTER_MASK 0xf000
76
77 /*
78 * Master Clock Directions
79 */
80 #define SND_SOC_CLOCK_IN 0
81 #define SND_SOC_CLOCK_OUT 1
82
83 #define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 |\
84 SNDRV_PCM_FMTBIT_S16_LE |\
85 SNDRV_PCM_FMTBIT_S16_BE |\
86 SNDRV_PCM_FMTBIT_S20_3LE |\
87 SNDRV_PCM_FMTBIT_S20_3BE |\
88 SNDRV_PCM_FMTBIT_S24_3LE |\
89 SNDRV_PCM_FMTBIT_S24_3BE |\
90 SNDRV_PCM_FMTBIT_S32_LE |\
91 SNDRV_PCM_FMTBIT_S32_BE)
92
93 struct snd_soc_dai_driver;
94 struct snd_soc_dai;
95 struct snd_ac97_bus_ops;
96
97 /* Digital Audio Interface registration */
98 int snd_soc_register_dai(struct device *dev,
99 struct snd_soc_dai_driver *dai_drv);
100 void snd_soc_unregister_dai(struct device *dev);
101 int snd_soc_register_dais(struct device *dev,
102 struct snd_soc_dai_driver *dai_drv, size_t count);
103 void snd_soc_unregister_dais(struct device *dev, size_t count);
104
105 /* Digital Audio Interface clocking API.*/
106 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
107 unsigned int freq, int dir);
108
109 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
110 int div_id, int div);
111
112 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
113 int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
114
115 /* Digital Audio interface formatting */
116 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
117
118 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
119 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
120
121 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
122 unsigned int tx_num, unsigned int *tx_slot,
123 unsigned int rx_num, unsigned int *rx_slot);
124
125 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
126
127 /* Digital Audio Interface mute */
128 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
129
130 struct snd_soc_dai_ops {
131 /*
132 * DAI clocking configuration, all optional.
133 * Called by soc_card drivers, normally in their hw_params.
134 */
135 int (*set_sysclk)(struct snd_soc_dai *dai,
136 int clk_id, unsigned int freq, int dir);
137 int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
138 unsigned int freq_in, unsigned int freq_out);
139 int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
140
141 /*
142 * DAI format configuration
143 * Called by soc_card drivers, normally in their hw_params.
144 */
145 int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
146 int (*set_tdm_slot)(struct snd_soc_dai *dai,
147 unsigned int tx_mask, unsigned int rx_mask,
148 int slots, int slot_width);
149 int (*set_channel_map)(struct snd_soc_dai *dai,
150 unsigned int tx_num, unsigned int *tx_slot,
151 unsigned int rx_num, unsigned int *rx_slot);
152 int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
153
154 /*
155 * DAI digital mute - optional.
156 * Called by soc-core to minimise any pops.
157 */
158 int (*digital_mute)(struct snd_soc_dai *dai, int mute);
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 int (*trigger)(struct snd_pcm_substream *, int,
175 struct snd_soc_dai *);
176 /*
177 * For hardware based FIFO caused delay reporting.
178 * Optional.
179 */
180 snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
181 struct snd_soc_dai *);
182 };
183
184 /*
185 * Digital Audio Interface Driver.
186 *
187 * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
188 * operations and capabilities. Codec and platform drivers will register this
189 * structure for every DAI they have.
190 *
191 * This structure covers the clocking, formating and ALSA operations for each
192 * interface.
193 */
194 struct snd_soc_dai_driver {
195 /* DAI description */
196 const char *name;
197 unsigned int id;
198 int ac97_control;
199
200 /* DAI driver callbacks */
201 int (*probe)(struct snd_soc_dai *dai);
202 int (*remove)(struct snd_soc_dai *dai);
203 int (*suspend)(struct snd_soc_dai *dai);
204 int (*resume)(struct snd_soc_dai *dai);
205
206 /* ops */
207 const struct snd_soc_dai_ops *ops;
208
209 /* DAI capabilities */
210 struct snd_soc_pcm_stream capture;
211 struct snd_soc_pcm_stream playback;
212 unsigned int symmetric_rates:1;
213
214 /* probe ordering - for components with runtime dependencies */
215 int probe_order;
216 int remove_order;
217 };
218
219 /*
220 * Digital Audio Interface runtime data.
221 *
222 * Holds runtime data for a DAI.
223 */
224 struct snd_soc_dai {
225 const char *name;
226 int id;
227 struct device *dev;
228 void *ac97_pdata; /* platform_data for the ac97 codec */
229
230 /* driver ops */
231 struct snd_soc_dai_driver *driver;
232
233 /* DAI runtime info */
234 unsigned int capture_active:1; /* stream is in use */
235 unsigned int playback_active:1; /* stream is in use */
236 unsigned int symmetric_rates:1;
237 struct snd_pcm_runtime *runtime;
238 unsigned int active;
239 unsigned char pop_wait:1;
240 unsigned char probed:1;
241
242 struct snd_soc_dapm_widget *playback_widget;
243 struct snd_soc_dapm_widget *capture_widget;
244
245 /* DAI DMA data */
246 void *playback_dma_data;
247 void *capture_dma_data;
248
249 /* Symmetry data - only valid if symmetry is being enforced */
250 unsigned int rate;
251
252 /* parent platform/codec */
253 struct snd_soc_platform *platform;
254 struct snd_soc_codec *codec;
255
256 struct snd_soc_card *card;
257
258 struct list_head list;
259 struct list_head card_list;
260 };
261
snd_soc_dai_get_dma_data(const struct snd_soc_dai * dai,const struct snd_pcm_substream * ss)262 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
263 const struct snd_pcm_substream *ss)
264 {
265 return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
266 dai->playback_dma_data : dai->capture_dma_data;
267 }
268
snd_soc_dai_set_dma_data(struct snd_soc_dai * dai,const struct snd_pcm_substream * ss,void * data)269 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
270 const struct snd_pcm_substream *ss,
271 void *data)
272 {
273 if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
274 dai->playback_dma_data = data;
275 else
276 dai->capture_dma_data = data;
277 }
278
snd_soc_dai_set_drvdata(struct snd_soc_dai * dai,void * data)279 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
280 void *data)
281 {
282 dev_set_drvdata(dai->dev, data);
283 }
284
snd_soc_dai_get_drvdata(struct snd_soc_dai * dai)285 static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
286 {
287 return dev_get_drvdata(dai->dev);
288 }
289
290 #endif
291