diff options
Diffstat (limited to 'Documentation/sound')
-rw-r--r-- | Documentation/sound/alsa/soc/DAI.txt | 358 | ||||
-rw-r--r-- | Documentation/sound/alsa/soc/clocking.txt | 13 |
2 files changed, 271 insertions, 100 deletions
diff --git a/Documentation/sound/alsa/soc/DAI.txt b/Documentation/sound/alsa/soc/DAI.txt index 919de76bab8d..251545a88693 100644 --- a/Documentation/sound/alsa/soc/DAI.txt +++ b/Documentation/sound/alsa/soc/DAI.txt | |||
@@ -12,7 +12,8 @@ The bit clock (BCLK) is always driven by the CODEC (usually 12.288MHz) and the | |||
12 | frame (FRAME) (usually 48kHz) is always driven by the controller. Each AC97 | 12 | frame (FRAME) (usually 48kHz) is always driven by the controller. Each AC97 |
13 | frame is 21uS long and is divided into 13 time slots. | 13 | frame is 21uS long and is divided into 13 time slots. |
14 | 14 | ||
15 | The AC97 specification can be found at http://intel.com/ | 15 | The AC97 specification can be found at :- |
16 | http://www.intel.com/design/chipsets/audio/ac97_r23.pdf | ||
16 | 17 | ||
17 | 18 | ||
18 | I2S | 19 | I2S |
@@ -77,16 +78,16 @@ sample rates first and then test your interface. | |||
77 | struct snd_soc_dai_mode is defined (in soc.h) as:- | 78 | struct snd_soc_dai_mode is defined (in soc.h) as:- |
78 | 79 | ||
79 | /* SoC DAI mode */ | 80 | /* SoC DAI mode */ |
80 | struct snd_soc_hw_mode { | 81 | struct snd_soc_dai_mode { |
81 | unsigned int fmt:16; /* SND_SOC_DAIFMT_* */ | 82 | u16 fmt; /* SND_SOC_DAIFMT_* */ |
82 | unsigned int tdm:16; /* SND_SOC_DAITDM_* */ | 83 | u16 tdm; /* SND_SOC_HWTDM_* */ |
83 | unsigned int pcmfmt:6; /* SNDRV_PCM_FORMAT_* */ | 84 | u64 pcmfmt; /* SNDRV_PCM_FMTBIT_* */ |
84 | unsigned int pcmrate:16; /* SND_SOC_DAIRATE_* */ | 85 | u16 pcmrate; /* SND_SOC_HWRATE_* */ |
85 | unsigned int pcmdir:2; /* SND_SOC_DAIDIR_* */ | 86 | u16 pcmdir:2; /* SND_SOC_HWDIR_* */ |
86 | unsigned int flags:8; /* hw flags */ | 87 | u16 flags:8; /* hw flags */ |
87 | unsigned int fs:32; /* mclk to rate dividers */ | 88 | u16 fs; /* mclk to rate divider */ |
88 | unsigned int bfs:16; /* mclk to bclk dividers */ | 89 | u64 bfs; /* mclk to bclk dividers */ |
89 | unsigned long priv; /* private mode data */ | 90 | unsigned long priv; /* private mode data */ |
90 | }; | 91 | }; |
91 | 92 | ||
92 | fmt: | 93 | fmt: |
@@ -140,14 +141,14 @@ pcmfmt: | |||
140 | The hardware PCM format. This describes the PCM formats supported by the DAI | 141 | The hardware PCM format. This describes the PCM formats supported by the DAI |
141 | mode e.g. | 142 | mode e.g. |
142 | 143 | ||
143 | .hwpcmfmt = SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S20_3LE | \ | 144 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S20_3LE | \ |
144 | SNDRV_PCM_FORMAT_S24_3LE | 145 | SNDRV_PCM_FORMAT_S24_3LE |
145 | 146 | ||
146 | pcmrate: | 147 | pcmrate: |
147 | ---------- | 148 | ---------- |
148 | The PCM sample rates supported by the DAI mode. e.g. | 149 | The PCM sample rates supported by the DAI mode. e.g. |
149 | 150 | ||
150 | .hwpcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ | 151 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ |
151 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | 152 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ |
152 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | 153 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
153 | 154 | ||
@@ -161,9 +162,14 @@ flags: | |||
161 | -------- | 162 | -------- |
162 | The DAI hardware flags supported by the mode. | 163 | The DAI hardware flags supported by the mode. |
163 | 164 | ||
164 | SND_SOC_DAI_BFS_DIV | 165 | /* use bfs mclk divider mode (BCLK = MCLK / x) */ |
165 | This flag states that bit clock is generated by dividing MCLK in this mode, if | 166 | #define SND_SOC_DAI_BFS_DIV 0x1 |
166 | this flag is absent the bitclock generated by mulitiplying sample rate. | 167 | /* use bfs rate mulitplier (BCLK = RATE * x)*/ |
168 | #define SND_SOC_DAI_BFS_RATE 0x2 | ||
169 | /* use bfs rcw multiplier (BCLK = RATE * CHN * WORD SIZE) */ | ||
170 | #define SND_SOC_DAI_BFS_RCW 0x4 | ||
171 | /* capture and playback can use different clocks */ | ||
172 | #define SND_SOC_DAI_ASYNC 0x8 | ||
167 | 173 | ||
168 | NOTE: Bitclock division and mulitiplication modes can be safely matched by the | 174 | NOTE: Bitclock division and mulitiplication modes can be safely matched by the |
169 | core logic. | 175 | core logic. |
@@ -181,7 +187,7 @@ depends on the codec or CPU DAI). | |||
181 | 187 | ||
182 | The BFS supported by the DAI mode. This can either be the ratio between the | 188 | The BFS supported by the DAI mode. This can either be the ratio between the |
183 | bitclock (BCLK) and the sample rate OR the ratio between the system clock and | 189 | bitclock (BCLK) and the sample rate OR the ratio between the system clock and |
184 | the sample rate. Depends on the SND_SOC_DAI_BFS_DIV flag above. | 190 | the sample rate. Depends on the flags above. |
185 | 191 | ||
186 | priv: | 192 | priv: |
187 | ----- | 193 | ----- |
@@ -207,10 +213,15 @@ Simple codec that only runs at 8k & 48k @ 256FS in master mode, can generate a | |||
207 | BCLK of either MCLK/2 or MCLK/4. | 213 | BCLK of either MCLK/2 or MCLK/4. |
208 | 214 | ||
209 | /* codec master */ | 215 | /* codec master */ |
210 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 216 | { |
211 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | 217 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
212 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 218 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
213 | 256, SND_SOC_FSBD(2) | SND_SOC_FSBD(4)}, | 219 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, |
220 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
221 | .flags = SND_SOC_DAI_BFS_DIV, | ||
222 | .fs = 256, | ||
223 | .bfs = SND_SOC_FSBD(2) | SND_SOC_FSBD(4), | ||
224 | } | ||
214 | 225 | ||
215 | 226 | ||
216 | Example 2 | 227 | Example 2 |
@@ -219,32 +230,95 @@ Simple codec that only runs at 8k & 48k @ 256FS in master mode, can generate a | |||
219 | BCLK of either Rate * 32 or Rate * 64. | 230 | BCLK of either Rate * 32 or Rate * 64. |
220 | 231 | ||
221 | /* codec master */ | 232 | /* codec master */ |
222 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 233 | { |
223 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | 234 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
224 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, 0, | 235 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
225 | 256, SND_SOC_FSB(32) | SND_SOC_FSB(64)}, | 236 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, |
237 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
238 | .flags = SND_SOC_DAI_BFS_RATE, | ||
239 | .fs = 256, | ||
240 | .bfs = 32, | ||
241 | }, | ||
242 | { | ||
243 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, | ||
244 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
245 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | ||
246 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
247 | .flags = SND_SOC_DAI_BFS_RATE, | ||
248 | .fs = 256, | ||
249 | .bfs = 64, | ||
250 | }, | ||
226 | 251 | ||
227 | 252 | ||
228 | Example 3 | 253 | Example 3 |
229 | --------- | 254 | --------- |
255 | Codec that runs at 8k & 48k @ 256FS in master mode, can generate a BCLK that | ||
256 | is a multiple of Rate * channels * word size. (RCW) i.e. | ||
257 | |||
258 | BCLK = 8000 * 2 * 16 (8k, stereo, 16bit) | ||
259 | = 256kHz | ||
260 | |||
261 | This codecs supports a RCW multiple of 1,2 | ||
262 | |||
263 | { | ||
264 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, | ||
265 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
266 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | ||
267 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
268 | .flags = SND_SOC_DAI_BFS_RCW, | ||
269 | .fs = 256, | ||
270 | .bfs = SND_SOC_FSBW(1) | SND_SOC_FSBW(2), | ||
271 | } | ||
272 | |||
273 | |||
274 | Example 4 | ||
275 | --------- | ||
230 | Codec that only runs at 8k & 48k @ 256FS in master mode, can generate a | 276 | Codec that only runs at 8k & 48k @ 256FS in master mode, can generate a |
231 | BCLK of either Rate * 32 or Rate * 64. Codec can also run in slave mode as long | 277 | BCLK of either Rate * 32 or Rate * 64. Codec can also run in slave mode as long |
232 | as BCLK is rate * 32 or rate * 64. | 278 | as BCLK is rate * 32 or rate * 64. |
233 | 279 | ||
234 | /* codec master */ | 280 | /* codec master */ |
235 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 281 | { |
236 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | 282 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
237 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, 0, | 283 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
238 | 256, SND_SOC_FSB(32) | SND_SOC_FSB(64)}, | 284 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, |
285 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
286 | .flags = SND_SOC_DAI_BFS_RATE, | ||
287 | .fs = 256, | ||
288 | .bfs = 32, | ||
289 | }, | ||
290 | { | ||
291 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, | ||
292 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
293 | .pcmrate = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | ||
294 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
295 | .flags = SND_SOC_DAI_BFS_RATE, | ||
296 | .fs = 256, | ||
297 | .bfs = 64, | ||
298 | }, | ||
239 | 299 | ||
240 | /* codec slave */ | 300 | /* codec slave */ |
241 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), | 301 | { |
242 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | 302 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, |
243 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, 0, | 303 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
244 | SND_SOC_FS_ALL, SND_SOC_FSB(32) | SND_SOC_FSB(64)}, | 304 | .pcmdir = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, |
305 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
306 | .flags = SND_SOC_DAI_BFS_RATE, | ||
307 | .fs = SND_SOC_FS_ALL, | ||
308 | .bfs = 32, | ||
309 | }, | ||
310 | { | ||
311 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, | ||
312 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
313 | .pcmdir = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000, | ||
314 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
315 | .flags = SND_SOC_DAI_BFS_RATE, | ||
316 | .fs = SND_SOC_FS_ALL, | ||
317 | .bfs = 64, | ||
318 | }, | ||
245 | 319 | ||
246 | 320 | ||
247 | Example 4 | 321 | Example 5 |
248 | --------- | 322 | --------- |
249 | Codec that only runs at 8k, 16k, 32k, 48k, 96k @ 128FS, 192FS & 256FS in master | 323 | Codec that only runs at 8k, 16k, 32k, 48k, 96k @ 128FS, 192FS & 256FS in master |
250 | mode and can generate a BCLK of MCLK / (1,2,4,8,16). Codec can also run in slave | 324 | mode and can generate a BCLK of MCLK / (1,2,4,8,16). Codec can also run in slave |
@@ -259,29 +333,48 @@ mode as and does not care about FS or BCLK (as long as there is enough bandwidth | |||
259 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000) | 333 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000) |
260 | 334 | ||
261 | /* codec master @ 128, 192 & 256 FS */ | 335 | /* codec master @ 128, 192 & 256 FS */ |
262 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 336 | { |
263 | SNDRV_PCM_FORMAT_S16_LE, CODEC_RATES, | 337 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
264 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 338 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
265 | 128, CODEC_FSB}, | 339 | .pcmrate = CODEC_RATES, |
266 | 340 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | |
267 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 341 | .flags = SND_SOC_DAI_BFS_DIV, |
268 | SNDRV_PCM_FORMAT_S16_LE, CODEC_RATES, | 342 | .fs = 128, |
269 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 343 | .bfs = CODEC_FSB, |
270 | 192, CODEC_FSB}, | 344 | }, |
271 | 345 | ||
272 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 346 | { |
273 | SNDRV_PCM_FORMAT_S16_LE, CODEC_RATES, | 347 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
274 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 348 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
275 | 256, CODEC_FSB}, | 349 | .pcmrate = CODEC_RATES, |
350 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
351 | .flags = SND_SOC_DAI_BFS_DIV, | ||
352 | .fs = 192, | ||
353 | .bfs = CODEC_FSB | ||
354 | }, | ||
355 | |||
356 | { | ||
357 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, | ||
358 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
359 | .pcmrate = CODEC_RATES, | ||
360 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
361 | .flags = SND_SOC_DAI_BFS_DIV, | ||
362 | .fs = 256, | ||
363 | .bfs = CODEC_FSB, | ||
364 | }, | ||
276 | 365 | ||
277 | /* codec slave */ | 366 | /* codec slave */ |
278 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), | 367 | { |
279 | SNDRV_PCM_FORMAT_S16_LE, CODEC_RATES, | 368 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, |
280 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, 0, | 369 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
281 | SND_SOC_FS_ALL, SND_SOC_FSB_ALL}, | 370 | .pcmrate = CODEC_RATES, |
371 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
372 | .fs = SND_SOC_FS_ALL, | ||
373 | .bfs = SND_SOC_FSB_ALL, | ||
374 | }, | ||
282 | 375 | ||
283 | 376 | ||
284 | Example 5 | 377 | Example 6 |
285 | --------- | 378 | --------- |
286 | Codec that only runs at 8k, 44.1k, 48k @ different FS in master mode (for use | 379 | Codec that only runs at 8k, 44.1k, 48k @ different FS in master mode (for use |
287 | with a fixed MCLK) and can generate a BCLK of MCLK / (1,2,4,8,16). | 380 | with a fixed MCLK) and can generate a BCLK of MCLK / (1,2,4,8,16). |
@@ -298,45 +391,66 @@ sizes. | |||
298 | SNDRV_PCM_FORMAT_S24_3LE | SNDRV_PCM_FORMAT_S24_LE | SNDRV_PCM_FORMAT_S32_LE) | 391 | SNDRV_PCM_FORMAT_S24_3LE | SNDRV_PCM_FORMAT_S24_LE | SNDRV_PCM_FORMAT_S32_LE) |
299 | 392 | ||
300 | /* codec master */ | 393 | /* codec master */ |
301 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 394 | { |
302 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_8000, | 395 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
303 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 396 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
304 | 1536, CODEC_FSB}, | 397 | .pcmrate = SNDRV_PCM_RATE_8000, |
305 | 398 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | |
306 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 399 | .flags = SND_SOC_DAI_BFS_DIV, |
307 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_44100, | 400 | .fs = 1536, |
308 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 401 | .bfs = CODEC_FSB, |
309 | 272, CODEC_FSB}, | 402 | }, |
310 | 403 | ||
311 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, SND_SOC_DAITDM_LRDW(0,0), | 404 | { |
312 | SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_RATE_48000, | 405 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, |
313 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, SND_SOC_DAI_BFS_DIV, | 406 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
314 | 256, CODEC_FSB}, | 407 | .pcmrate = SNDRV_PCM_RATE_44100, |
408 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
409 | .flags = SND_SOC_DAI_BFS_DIV, | ||
410 | .fs = 272, | ||
411 | .bfs = CODEC_FSB, | ||
412 | }, | ||
413 | |||
414 | { | ||
415 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM, | ||
416 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, | ||
417 | .pcmrate = SNDRV_PCM_RATE_48000, | ||
418 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
419 | .flags = SND_SOC_DAI_BFS_DIV, | ||
420 | .fs = 256, | ||
421 | .bfs = CODEC_FSB, | ||
422 | }, | ||
315 | 423 | ||
316 | /* codec slave */ | 424 | /* codec slave */ |
317 | {SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), | 425 | { |
318 | SNDRV_PCM_FORMAT_S16_LE, CODEC_RATES, | 426 | .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS, |
319 | SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, 0, | 427 | .pcmfmt = SNDRV_PCM_FORMAT_S16_LE, |
320 | SND_SOC_FS_ALL, SND_SOC_FSB_ALL}, | 428 | .pcmrate = CODEC_RATES, |
429 | .pcmdir = SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE, | ||
430 | .fs = SND_SOC_FS_ALL, | ||
431 | .bfs = SND_SOC_FSB_ALL, | ||
432 | }, | ||
321 | 433 | ||
322 | 434 | ||
323 | Example 6 | 435 | Example 7 |
324 | --------- | 436 | --------- |
325 | AC97 Codec that does not support VRA (i.e only runs at 48k). | 437 | AC97 Codec that does not support VRA (i.e only runs at 48k). |
326 | 438 | ||
327 | #define AC97_DIR \ | 439 | #define AC97_DIR \ |
328 | (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) | 440 | (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) |
329 | 441 | ||
330 | |||
331 | #define AC97_PCM_FORMATS \ | 442 | #define AC97_PCM_FORMATS \ |
332 | (SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S18_3LE | \ | 443 | (SNDRV_PCM_FORMAT_S16_LE | SNDRV_PCM_FORMAT_S18_3LE | \ |
333 | SNDRV_PCM_FORMAT_S20_3LE) | 444 | SNDRV_PCM_FORMAT_S20_3LE) |
334 | 445 | ||
335 | /* AC97 with no VRA */ | 446 | /* AC97 with no VRA */ |
336 | {0, 0, AC97_PCM_FORMATS, SNDRV_PCM_RATE_48000}, | 447 | { |
448 | .pcmfmt = AC97_PCM_FORMATS, | ||
449 | .pcmrate = SNDRV_PCM_RATE_48000, | ||
450 | } | ||
337 | 451 | ||
338 | 452 | ||
339 | Example 7 | 453 | Example 8 |
340 | --------- | 454 | --------- |
341 | 455 | ||
342 | CPU DAI that supports 8k - 48k @ 256FS and BCLK = MCLK / 4 in master mode. | 456 | CPU DAI that supports 8k - 48k @ 256FS and BCLK = MCLK / 4 in master mode. |
@@ -354,27 +468,79 @@ BCLK = 64 * rate. (Intel XScale I2S controller). | |||
354 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | 468 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ |
355 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | 469 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) |
356 | 470 | ||
471 | /* priv is divider */ | ||
472 | static struct snd_soc_dai_mode pxa2xx_i2s_modes[] = { | ||
357 | /* pxa2xx I2S frame and clock master modes */ | 473 | /* pxa2xx I2S frame and clock master modes */ |
358 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 474 | { |
359 | SNDRV_PCM_RATE_8000, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 475 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, |
360 | SND_SOC_FSBD(4), 0x48}, | 476 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, |
361 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 477 | .pcmrate = SNDRV_PCM_RATE_8000, |
362 | SNDRV_PCM_RATE_11025, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 478 | .pcmdir = PXA_I2S_DIR, |
363 | SND_SOC_FSBD(4), 0x34}, | 479 | .flags = SND_SOC_DAI_BFS_DIV, |
364 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 480 | .fs = 256, |
365 | SNDRV_PCM_RATE_16000, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 481 | .bfs = SND_SOC_FSBD(4), |
366 | SND_SOC_FSBD(4), 0x24}, | 482 | .priv = 0x48, |
367 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 483 | }, |
368 | SNDRV_PCM_RATE_22050, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 484 | { |
369 | SND_SOC_FSBD(4), 0x1a}, | 485 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, |
370 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 486 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, |
371 | SNDRV_PCM_RATE_44100, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 487 | .pcmrate = SNDRV_PCM_RATE_11025, |
372 | SND_SOC_FSBD(4), 0xd}, | 488 | .pcmdir = PXA_I2S_DIR, |
373 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 489 | .flags = SND_SOC_DAI_BFS_DIV, |
374 | SNDRV_PCM_RATE_48000, PXA_I2S_DIR, SND_SOC_DAI_BFS_DIV, 256, | 490 | .fs = 256, |
375 | SND_SOC_FSBD(4), 0xc}, | 491 | .bfs = SND_SOC_FSBD(4), |
492 | .priv = 0x34, | ||
493 | }, | ||
494 | { | ||
495 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, | ||
496 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, | ||
497 | .pcmrate = SNDRV_PCM_RATE_16000, | ||
498 | .pcmdir = PXA_I2S_DIR, | ||
499 | .flags = SND_SOC_DAI_BFS_DIV, | ||
500 | .fs = 256, | ||
501 | .bfs = SND_SOC_FSBD(4), | ||
502 | .priv = 0x24, | ||
503 | }, | ||
504 | { | ||
505 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, | ||
506 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, | ||
507 | .pcmrate = SNDRV_PCM_RATE_22050, | ||
508 | .pcmdir = PXA_I2S_DIR, | ||
509 | .flags = SND_SOC_DAI_BFS_DIV, | ||
510 | .fs = 256, | ||
511 | .bfs = SND_SOC_FSBD(4), | ||
512 | .priv = 0x1a, | ||
513 | }, | ||
514 | { | ||
515 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, | ||
516 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, | ||
517 | .pcmrate = SNDRV_PCM_RATE_44100, | ||
518 | .pcmdir = PXA_I2S_DIR, | ||
519 | .flags = SND_SOC_DAI_BFS_DIV, | ||
520 | .fs = 256, | ||
521 | .bfs = SND_SOC_FSBD(4), | ||
522 | .priv = 0xd, | ||
523 | }, | ||
524 | { | ||
525 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBS_CFS, | ||
526 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, | ||
527 | .pcmrate = SNDRV_PCM_RATE_48000, | ||
528 | .pcmdir = PXA_I2S_DIR, | ||
529 | .flags = SND_SOC_DAI_BFS_DIV, | ||
530 | .fs = 256, | ||
531 | .bfs = SND_SOC_FSBD(4), | ||
532 | .priv = 0xc, | ||
533 | }, | ||
376 | 534 | ||
377 | /* pxa2xx I2S frame master and clock slave mode */ | 535 | /* pxa2xx I2S frame master and clock slave mode */ |
378 | {PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBM_CFS, SND_SOC_DAITDM_LRDW(0,0), SNDRV_PCM_FORMAT_S16_LE, | 536 | { |
379 | PXA_I2S_RATES, PXA_I2S_DIR, 0, SND_SOC_FS_ALL, SND_SOC_FSB(64)}, | 537 | .fmt = PXA_I2S_DAIFMT | SND_SOC_DAIFMT_CBM_CFS, |
380 | 538 | .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE, | |
539 | .pcmrate = PXA_I2S_RATES, | ||
540 | .pcmdir = PXA_I2S_DIR, | ||
541 | .fs = SND_SOC_FS_ALL, | ||
542 | .flags = SND_SOC_DAI_BFS_RATE, | ||
543 | .bfs = 64, | ||
544 | .priv = 0x48, | ||
545 | }, | ||
546 | }; | ||
diff --git a/Documentation/sound/alsa/soc/clocking.txt b/Documentation/sound/alsa/soc/clocking.txt index 88a16c9e1979..1f55fd8cb117 100644 --- a/Documentation/sound/alsa/soc/clocking.txt +++ b/Documentation/sound/alsa/soc/clocking.txt | |||
@@ -26,9 +26,9 @@ between the codec and CPU. | |||
26 | 26 | ||
27 | The DAI also has a frame clock to signal the start of each audio frame. This | 27 | The DAI also has a frame clock to signal the start of each audio frame. This |
28 | clock is sometimes referred to as LRC (left right clock) or FRAME. This clock | 28 | clock is sometimes referred to as LRC (left right clock) or FRAME. This clock |
29 | runs at exactly the sample rate. | 29 | runs at exactly the sample rate (LRC = Rate). |
30 | 30 | ||
31 | Bit Clock is usually always a ratio of MCLK or a multiple of LRC. i.e. | 31 | Bit Clock can be generated as follows:- |
32 | 32 | ||
33 | BCLK = MCLK / x | 33 | BCLK = MCLK / x |
34 | 34 | ||
@@ -36,9 +36,14 @@ BCLK = MCLK / x | |||
36 | 36 | ||
37 | BCLK = LRC * x | 37 | BCLK = LRC * x |
38 | 38 | ||
39 | or | ||
40 | |||
41 | BCLK = LRC * Channels * Word Size | ||
42 | |||
39 | This relationship depends on the codec or SoC CPU in particular. ASoC can quite | 43 | This relationship depends on the codec or SoC CPU in particular. ASoC can quite |
40 | easily match a codec that generates BCLK by division (FSBD) with a CPU that | 44 | easily match BCLK generated by division (SND_SOC_DAI_BFS_DIV) with BCLK by |
41 | generates BCLK by multiplication (FSB). | 45 | multiplication (SND_SOC_DAI_BFS_RATE) or BCLK generated by |
46 | Rate * Channels * Word size (RCW or SND_SOC_DAI_BFS_RCW). | ||
42 | 47 | ||
43 | 48 | ||
44 | ASoC Clocking | 49 | ASoC Clocking |