Commit | Line | Data |
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17a52fd6 MB |
1 | /* |
2 | * soc-cache.c -- ASoC register cache helpers | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
7084a42b | 14 | #include <linux/i2c.h> |
27ded041 | 15 | #include <linux/spi/spi.h> |
17a52fd6 | 16 | #include <sound/soc.h> |
cc28fb8e DP |
17 | #include <linux/lzo.h> |
18 | #include <linux/bitmap.h> | |
a7f387d5 | 19 | #include <linux/rbtree.h> |
17a52fd6 | 20 | |
63b62ab0 BS |
21 | static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec, |
22 | unsigned int reg) | |
23 | { | |
7a30a3db DP |
24 | int ret; |
25 | unsigned int val; | |
db49c146 DP |
26 | |
27 | if (reg >= codec->driver->reg_cache_size || | |
28 | snd_soc_codec_volatile_register(codec, reg)) { | |
29 | if (codec->cache_only) | |
30 | return -1; | |
31 | ||
5aaa062c | 32 | BUG_ON(!codec->hw_read); |
db49c146 DP |
33 | return codec->hw_read(codec, reg); |
34 | } | |
35 | ||
7a30a3db DP |
36 | ret = snd_soc_cache_read(codec, reg, &val); |
37 | if (ret < 0) | |
38 | return -1; | |
39 | return val; | |
63b62ab0 BS |
40 | } |
41 | ||
42 | static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg, | |
43 | unsigned int value) | |
44 | { | |
63b62ab0 BS |
45 | u8 data[2]; |
46 | int ret; | |
47 | ||
63b62ab0 BS |
48 | data[0] = (reg << 4) | ((value >> 8) & 0x000f); |
49 | data[1] = value & 0x00ff; | |
50 | ||
db49c146 | 51 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
52 | reg < codec->driver->reg_cache_size) { |
53 | ret = snd_soc_cache_write(codec, reg, value); | |
54 | if (ret < 0) | |
55 | return -1; | |
56 | } | |
8c961bcc | 57 | |
a3032b47 MB |
58 | if (codec->cache_only) { |
59 | codec->cache_sync = 1; | |
8c961bcc | 60 | return 0; |
a3032b47 | 61 | } |
8c961bcc | 62 | |
63b62ab0 BS |
63 | ret = codec->hw_write(codec->control_data, data, 2); |
64 | if (ret == 2) | |
65 | return 0; | |
66 | if (ret < 0) | |
67 | return ret; | |
68 | else | |
69 | return -EIO; | |
70 | } | |
71 | ||
72 | #if defined(CONFIG_SPI_MASTER) | |
73 | static int snd_soc_4_12_spi_write(void *control_data, const char *data, | |
74 | int len) | |
75 | { | |
76 | struct spi_device *spi = control_data; | |
77 | struct spi_transfer t; | |
78 | struct spi_message m; | |
79 | u8 msg[2]; | |
80 | ||
81 | if (len <= 0) | |
82 | return 0; | |
83 | ||
84 | msg[0] = data[1]; | |
85 | msg[1] = data[0]; | |
86 | ||
87 | spi_message_init(&m); | |
88 | memset(&t, 0, (sizeof t)); | |
89 | ||
90 | t.tx_buf = &msg[0]; | |
91 | t.len = len; | |
92 | ||
93 | spi_message_add_tail(&t, &m); | |
94 | spi_sync(spi, &m); | |
95 | ||
96 | return len; | |
97 | } | |
98 | #else | |
99 | #define snd_soc_4_12_spi_write NULL | |
100 | #endif | |
101 | ||
17a52fd6 MB |
102 | static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec, |
103 | unsigned int reg) | |
104 | { | |
7a30a3db DP |
105 | int ret; |
106 | unsigned int val; | |
db49c146 DP |
107 | |
108 | if (reg >= codec->driver->reg_cache_size || | |
109 | snd_soc_codec_volatile_register(codec, reg)) { | |
110 | if (codec->cache_only) | |
111 | return -1; | |
112 | ||
5aaa062c | 113 | BUG_ON(!codec->hw_read); |
db49c146 DP |
114 | return codec->hw_read(codec, reg); |
115 | } | |
116 | ||
7a30a3db DP |
117 | ret = snd_soc_cache_read(codec, reg, &val); |
118 | if (ret < 0) | |
119 | return -1; | |
120 | return val; | |
17a52fd6 MB |
121 | } |
122 | ||
123 | static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, | |
124 | unsigned int value) | |
125 | { | |
17a52fd6 MB |
126 | u8 data[2]; |
127 | int ret; | |
128 | ||
17a52fd6 MB |
129 | data[0] = (reg << 1) | ((value >> 8) & 0x0001); |
130 | data[1] = value & 0x00ff; | |
131 | ||
db49c146 | 132 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
133 | reg < codec->driver->reg_cache_size) { |
134 | ret = snd_soc_cache_write(codec, reg, value); | |
135 | if (ret < 0) | |
136 | return -1; | |
137 | } | |
8c961bcc | 138 | |
a3032b47 MB |
139 | if (codec->cache_only) { |
140 | codec->cache_sync = 1; | |
8c961bcc | 141 | return 0; |
a3032b47 | 142 | } |
8c961bcc | 143 | |
17a52fd6 MB |
144 | ret = codec->hw_write(codec->control_data, data, 2); |
145 | if (ret == 2) | |
146 | return 0; | |
147 | if (ret < 0) | |
148 | return ret; | |
149 | else | |
150 | return -EIO; | |
151 | } | |
152 | ||
27ded041 MB |
153 | #if defined(CONFIG_SPI_MASTER) |
154 | static int snd_soc_7_9_spi_write(void *control_data, const char *data, | |
155 | int len) | |
156 | { | |
157 | struct spi_device *spi = control_data; | |
158 | struct spi_transfer t; | |
159 | struct spi_message m; | |
160 | u8 msg[2]; | |
161 | ||
162 | if (len <= 0) | |
163 | return 0; | |
164 | ||
165 | msg[0] = data[0]; | |
166 | msg[1] = data[1]; | |
167 | ||
168 | spi_message_init(&m); | |
169 | memset(&t, 0, (sizeof t)); | |
170 | ||
171 | t.tx_buf = &msg[0]; | |
172 | t.len = len; | |
173 | ||
174 | spi_message_add_tail(&t, &m); | |
175 | spi_sync(spi, &m); | |
176 | ||
177 | return len; | |
178 | } | |
179 | #else | |
180 | #define snd_soc_7_9_spi_write NULL | |
181 | #endif | |
182 | ||
341c9b84 JS |
183 | static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg, |
184 | unsigned int value) | |
185 | { | |
341c9b84 | 186 | u8 data[2]; |
7a30a3db | 187 | int ret; |
341c9b84 | 188 | |
f4bee1bb BS |
189 | reg &= 0xff; |
190 | data[0] = reg; | |
341c9b84 JS |
191 | data[1] = value & 0xff; |
192 | ||
005d65fb | 193 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
194 | reg < codec->driver->reg_cache_size) { |
195 | ret = snd_soc_cache_write(codec, reg, value); | |
196 | if (ret < 0) | |
197 | return -1; | |
198 | } | |
341c9b84 | 199 | |
a3032b47 MB |
200 | if (codec->cache_only) { |
201 | codec->cache_sync = 1; | |
8c961bcc | 202 | return 0; |
a3032b47 | 203 | } |
8c961bcc | 204 | |
341c9b84 JS |
205 | if (codec->hw_write(codec->control_data, data, 2) == 2) |
206 | return 0; | |
207 | else | |
208 | return -EIO; | |
209 | } | |
210 | ||
211 | static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec, | |
212 | unsigned int reg) | |
213 | { | |
7a30a3db DP |
214 | int ret; |
215 | unsigned int val; | |
db49c146 | 216 | |
f4bee1bb | 217 | reg &= 0xff; |
db49c146 DP |
218 | if (reg >= codec->driver->reg_cache_size || |
219 | snd_soc_codec_volatile_register(codec, reg)) { | |
220 | if (codec->cache_only) | |
221 | return -1; | |
222 | ||
5aaa062c | 223 | BUG_ON(!codec->hw_read); |
db49c146 DP |
224 | return codec->hw_read(codec, reg); |
225 | } | |
226 | ||
7a30a3db DP |
227 | ret = snd_soc_cache_read(codec, reg, &val); |
228 | if (ret < 0) | |
229 | return -1; | |
230 | return val; | |
341c9b84 JS |
231 | } |
232 | ||
f479fd93 DP |
233 | #if defined(CONFIG_SPI_MASTER) |
234 | static int snd_soc_8_8_spi_write(void *control_data, const char *data, | |
235 | int len) | |
236 | { | |
237 | struct spi_device *spi = control_data; | |
238 | struct spi_transfer t; | |
239 | struct spi_message m; | |
240 | u8 msg[2]; | |
241 | ||
242 | if (len <= 0) | |
243 | return 0; | |
244 | ||
245 | msg[0] = data[0]; | |
246 | msg[1] = data[1]; | |
247 | ||
248 | spi_message_init(&m); | |
249 | memset(&t, 0, (sizeof t)); | |
250 | ||
251 | t.tx_buf = &msg[0]; | |
252 | t.len = len; | |
253 | ||
254 | spi_message_add_tail(&t, &m); | |
255 | spi_sync(spi, &m); | |
256 | ||
257 | return len; | |
258 | } | |
259 | #else | |
260 | #define snd_soc_8_8_spi_write NULL | |
261 | #endif | |
262 | ||
afa2f106 MB |
263 | static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, |
264 | unsigned int value) | |
265 | { | |
afa2f106 | 266 | u8 data[3]; |
7a30a3db | 267 | int ret; |
afa2f106 MB |
268 | |
269 | data[0] = reg; | |
270 | data[1] = (value >> 8) & 0xff; | |
271 | data[2] = value & 0xff; | |
272 | ||
3e13f65e | 273 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
274 | reg < codec->driver->reg_cache_size) { |
275 | ret = snd_soc_cache_write(codec, reg, value); | |
276 | if (ret < 0) | |
277 | return -1; | |
278 | } | |
afa2f106 | 279 | |
a3032b47 MB |
280 | if (codec->cache_only) { |
281 | codec->cache_sync = 1; | |
8c961bcc | 282 | return 0; |
a3032b47 | 283 | } |
8c961bcc | 284 | |
afa2f106 MB |
285 | if (codec->hw_write(codec->control_data, data, 3) == 3) |
286 | return 0; | |
287 | else | |
288 | return -EIO; | |
289 | } | |
290 | ||
291 | static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, | |
292 | unsigned int reg) | |
293 | { | |
7a30a3db DP |
294 | int ret; |
295 | unsigned int val; | |
afa2f106 | 296 | |
f0fba2ad | 297 | if (reg >= codec->driver->reg_cache_size || |
8c961bcc MB |
298 | snd_soc_codec_volatile_register(codec, reg)) { |
299 | if (codec->cache_only) | |
391d8a04 | 300 | return -1; |
8c961bcc | 301 | |
5aaa062c | 302 | BUG_ON(!codec->hw_read); |
afa2f106 | 303 | return codec->hw_read(codec, reg); |
8c961bcc | 304 | } |
7a30a3db DP |
305 | |
306 | ret = snd_soc_cache_read(codec, reg, &val); | |
307 | if (ret < 0) | |
308 | return -1; | |
309 | return val; | |
afa2f106 MB |
310 | } |
311 | ||
f479fd93 DP |
312 | #if defined(CONFIG_SPI_MASTER) |
313 | static int snd_soc_8_16_spi_write(void *control_data, const char *data, | |
314 | int len) | |
315 | { | |
316 | struct spi_device *spi = control_data; | |
317 | struct spi_transfer t; | |
318 | struct spi_message m; | |
319 | u8 msg[3]; | |
320 | ||
321 | if (len <= 0) | |
322 | return 0; | |
323 | ||
324 | msg[0] = data[0]; | |
325 | msg[1] = data[1]; | |
326 | msg[2] = data[2]; | |
327 | ||
328 | spi_message_init(&m); | |
329 | memset(&t, 0, (sizeof t)); | |
330 | ||
331 | t.tx_buf = &msg[0]; | |
332 | t.len = len; | |
333 | ||
334 | spi_message_add_tail(&t, &m); | |
335 | spi_sync(spi, &m); | |
336 | ||
337 | return len; | |
338 | } | |
339 | #else | |
340 | #define snd_soc_8_16_spi_write NULL | |
341 | #endif | |
342 | ||
85dfcdff CC |
343 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
344 | static unsigned int snd_soc_8_8_read_i2c(struct snd_soc_codec *codec, | |
345 | unsigned int r) | |
346 | { | |
347 | struct i2c_msg xfer[2]; | |
348 | u8 reg = r; | |
349 | u8 data; | |
350 | int ret; | |
351 | struct i2c_client *client = codec->control_data; | |
352 | ||
353 | /* Write register */ | |
354 | xfer[0].addr = client->addr; | |
355 | xfer[0].flags = 0; | |
356 | xfer[0].len = 1; | |
357 | xfer[0].buf = ® | |
358 | ||
359 | /* Read data */ | |
360 | xfer[1].addr = client->addr; | |
361 | xfer[1].flags = I2C_M_RD; | |
362 | xfer[1].len = 1; | |
363 | xfer[1].buf = &data; | |
364 | ||
365 | ret = i2c_transfer(client->adapter, xfer, 2); | |
366 | if (ret != 2) { | |
367 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | return data; | |
372 | } | |
373 | #else | |
374 | #define snd_soc_8_8_read_i2c NULL | |
375 | #endif | |
376 | ||
17244c24 | 377 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
afa2f106 MB |
378 | static unsigned int snd_soc_8_16_read_i2c(struct snd_soc_codec *codec, |
379 | unsigned int r) | |
380 | { | |
381 | struct i2c_msg xfer[2]; | |
382 | u8 reg = r; | |
383 | u16 data; | |
384 | int ret; | |
385 | struct i2c_client *client = codec->control_data; | |
386 | ||
387 | /* Write register */ | |
388 | xfer[0].addr = client->addr; | |
389 | xfer[0].flags = 0; | |
390 | xfer[0].len = 1; | |
391 | xfer[0].buf = ® | |
392 | ||
393 | /* Read data */ | |
394 | xfer[1].addr = client->addr; | |
395 | xfer[1].flags = I2C_M_RD; | |
396 | xfer[1].len = 2; | |
397 | xfer[1].buf = (u8 *)&data; | |
398 | ||
399 | ret = i2c_transfer(client->adapter, xfer, 2); | |
400 | if (ret != 2) { | |
401 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); | |
402 | return 0; | |
403 | } | |
404 | ||
405 | return (data >> 8) | ((data & 0xff) << 8); | |
406 | } | |
407 | #else | |
408 | #define snd_soc_8_16_read_i2c NULL | |
409 | #endif | |
17a52fd6 | 410 | |
994dc424 BS |
411 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
412 | static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec, | |
413 | unsigned int r) | |
414 | { | |
415 | struct i2c_msg xfer[2]; | |
416 | u16 reg = r; | |
417 | u8 data; | |
418 | int ret; | |
419 | struct i2c_client *client = codec->control_data; | |
420 | ||
421 | /* Write register */ | |
422 | xfer[0].addr = client->addr; | |
423 | xfer[0].flags = 0; | |
424 | xfer[0].len = 2; | |
425 | xfer[0].buf = (u8 *)® | |
426 | ||
427 | /* Read data */ | |
428 | xfer[1].addr = client->addr; | |
429 | xfer[1].flags = I2C_M_RD; | |
430 | xfer[1].len = 1; | |
431 | xfer[1].buf = &data; | |
432 | ||
433 | ret = i2c_transfer(client->adapter, xfer, 2); | |
434 | if (ret != 2) { | |
435 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return data; | |
440 | } | |
441 | #else | |
442 | #define snd_soc_16_8_read_i2c NULL | |
443 | #endif | |
444 | ||
445 | static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec, | |
446 | unsigned int reg) | |
447 | { | |
7a30a3db DP |
448 | int ret; |
449 | unsigned int val; | |
994dc424 BS |
450 | |
451 | reg &= 0xff; | |
db49c146 DP |
452 | if (reg >= codec->driver->reg_cache_size || |
453 | snd_soc_codec_volatile_register(codec, reg)) { | |
454 | if (codec->cache_only) | |
455 | return -1; | |
456 | ||
5aaa062c | 457 | BUG_ON(!codec->hw_read); |
db49c146 DP |
458 | return codec->hw_read(codec, reg); |
459 | } | |
460 | ||
7a30a3db DP |
461 | ret = snd_soc_cache_read(codec, reg, &val); |
462 | if (ret < 0) | |
463 | return -1; | |
464 | return val; | |
994dc424 BS |
465 | } |
466 | ||
467 | static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg, | |
468 | unsigned int value) | |
469 | { | |
994dc424 BS |
470 | u8 data[3]; |
471 | int ret; | |
472 | ||
994dc424 BS |
473 | data[0] = (reg >> 8) & 0xff; |
474 | data[1] = reg & 0xff; | |
475 | data[2] = value; | |
476 | ||
477 | reg &= 0xff; | |
db49c146 | 478 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
479 | reg < codec->driver->reg_cache_size) { |
480 | ret = snd_soc_cache_write(codec, reg, value); | |
481 | if (ret < 0) | |
482 | return -1; | |
483 | } | |
8c961bcc | 484 | |
a3032b47 MB |
485 | if (codec->cache_only) { |
486 | codec->cache_sync = 1; | |
8c961bcc | 487 | return 0; |
a3032b47 | 488 | } |
8c961bcc | 489 | |
994dc424 BS |
490 | ret = codec->hw_write(codec->control_data, data, 3); |
491 | if (ret == 3) | |
492 | return 0; | |
493 | if (ret < 0) | |
494 | return ret; | |
495 | else | |
496 | return -EIO; | |
497 | } | |
498 | ||
499 | #if defined(CONFIG_SPI_MASTER) | |
500 | static int snd_soc_16_8_spi_write(void *control_data, const char *data, | |
501 | int len) | |
502 | { | |
503 | struct spi_device *spi = control_data; | |
504 | struct spi_transfer t; | |
505 | struct spi_message m; | |
506 | u8 msg[3]; | |
507 | ||
508 | if (len <= 0) | |
509 | return 0; | |
510 | ||
511 | msg[0] = data[0]; | |
512 | msg[1] = data[1]; | |
513 | msg[2] = data[2]; | |
514 | ||
515 | spi_message_init(&m); | |
516 | memset(&t, 0, (sizeof t)); | |
517 | ||
518 | t.tx_buf = &msg[0]; | |
519 | t.len = len; | |
520 | ||
521 | spi_message_add_tail(&t, &m); | |
522 | spi_sync(spi, &m); | |
523 | ||
524 | return len; | |
525 | } | |
526 | #else | |
527 | #define snd_soc_16_8_spi_write NULL | |
528 | #endif | |
529 | ||
bc6552f4 MB |
530 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
531 | static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec, | |
532 | unsigned int r) | |
533 | { | |
534 | struct i2c_msg xfer[2]; | |
535 | u16 reg = cpu_to_be16(r); | |
536 | u16 data; | |
537 | int ret; | |
538 | struct i2c_client *client = codec->control_data; | |
539 | ||
540 | /* Write register */ | |
541 | xfer[0].addr = client->addr; | |
542 | xfer[0].flags = 0; | |
543 | xfer[0].len = 2; | |
544 | xfer[0].buf = (u8 *)® | |
545 | ||
546 | /* Read data */ | |
547 | xfer[1].addr = client->addr; | |
548 | xfer[1].flags = I2C_M_RD; | |
549 | xfer[1].len = 2; | |
550 | xfer[1].buf = (u8 *)&data; | |
551 | ||
552 | ret = i2c_transfer(client->adapter, xfer, 2); | |
553 | if (ret != 2) { | |
554 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | return be16_to_cpu(data); | |
559 | } | |
560 | #else | |
561 | #define snd_soc_16_16_read_i2c NULL | |
562 | #endif | |
563 | ||
564 | static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec, | |
565 | unsigned int reg) | |
566 | { | |
7a30a3db DP |
567 | int ret; |
568 | unsigned int val; | |
bc6552f4 | 569 | |
f0fba2ad | 570 | if (reg >= codec->driver->reg_cache_size || |
bc6552f4 MB |
571 | snd_soc_codec_volatile_register(codec, reg)) { |
572 | if (codec->cache_only) | |
391d8a04 | 573 | return -1; |
bc6552f4 | 574 | |
5aaa062c | 575 | BUG_ON(!codec->hw_read); |
bc6552f4 MB |
576 | return codec->hw_read(codec, reg); |
577 | } | |
578 | ||
7a30a3db DP |
579 | ret = snd_soc_cache_read(codec, reg, &val); |
580 | if (ret < 0) | |
581 | return -1; | |
582 | ||
583 | return val; | |
bc6552f4 MB |
584 | } |
585 | ||
586 | static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg, | |
587 | unsigned int value) | |
588 | { | |
bc6552f4 MB |
589 | u8 data[4]; |
590 | int ret; | |
591 | ||
592 | data[0] = (reg >> 8) & 0xff; | |
593 | data[1] = reg & 0xff; | |
594 | data[2] = (value >> 8) & 0xff; | |
595 | data[3] = value & 0xff; | |
596 | ||
db49c146 | 597 | if (!snd_soc_codec_volatile_register(codec, reg) && |
7a30a3db DP |
598 | reg < codec->driver->reg_cache_size) { |
599 | ret = snd_soc_cache_write(codec, reg, value); | |
600 | if (ret < 0) | |
601 | return -1; | |
602 | } | |
bc6552f4 MB |
603 | |
604 | if (codec->cache_only) { | |
605 | codec->cache_sync = 1; | |
606 | return 0; | |
607 | } | |
608 | ||
609 | ret = codec->hw_write(codec->control_data, data, 4); | |
610 | if (ret == 4) | |
611 | return 0; | |
612 | if (ret < 0) | |
613 | return ret; | |
614 | else | |
615 | return -EIO; | |
616 | } | |
994dc424 | 617 | |
f479fd93 DP |
618 | #if defined(CONFIG_SPI_MASTER) |
619 | static int snd_soc_16_16_spi_write(void *control_data, const char *data, | |
620 | int len) | |
621 | { | |
622 | struct spi_device *spi = control_data; | |
623 | struct spi_transfer t; | |
624 | struct spi_message m; | |
625 | u8 msg[4]; | |
626 | ||
627 | if (len <= 0) | |
628 | return 0; | |
629 | ||
630 | msg[0] = data[0]; | |
631 | msg[1] = data[1]; | |
632 | msg[2] = data[2]; | |
633 | msg[3] = data[3]; | |
634 | ||
635 | spi_message_init(&m); | |
636 | memset(&t, 0, (sizeof t)); | |
637 | ||
638 | t.tx_buf = &msg[0]; | |
639 | t.len = len; | |
640 | ||
641 | spi_message_add_tail(&t, &m); | |
642 | spi_sync(spi, &m); | |
643 | ||
644 | return len; | |
645 | } | |
646 | #else | |
647 | #define snd_soc_16_16_spi_write NULL | |
648 | #endif | |
649 | ||
17a52fd6 MB |
650 | static struct { |
651 | int addr_bits; | |
652 | int data_bits; | |
afa2f106 | 653 | int (*write)(struct snd_soc_codec *codec, unsigned int, unsigned int); |
27ded041 | 654 | int (*spi_write)(void *, const char *, int); |
17a52fd6 | 655 | unsigned int (*read)(struct snd_soc_codec *, unsigned int); |
afa2f106 | 656 | unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int); |
17a52fd6 | 657 | } io_types[] = { |
63b62ab0 BS |
658 | { |
659 | .addr_bits = 4, .data_bits = 12, | |
660 | .write = snd_soc_4_12_write, .read = snd_soc_4_12_read, | |
661 | .spi_write = snd_soc_4_12_spi_write, | |
662 | }, | |
d62ab358 MB |
663 | { |
664 | .addr_bits = 7, .data_bits = 9, | |
665 | .write = snd_soc_7_9_write, .read = snd_soc_7_9_read, | |
8998c899 | 666 | .spi_write = snd_soc_7_9_spi_write, |
d62ab358 MB |
667 | }, |
668 | { | |
669 | .addr_bits = 8, .data_bits = 8, | |
670 | .write = snd_soc_8_8_write, .read = snd_soc_8_8_read, | |
85dfcdff | 671 | .i2c_read = snd_soc_8_8_read_i2c, |
f479fd93 | 672 | .spi_write = snd_soc_8_8_spi_write, |
d62ab358 MB |
673 | }, |
674 | { | |
675 | .addr_bits = 8, .data_bits = 16, | |
676 | .write = snd_soc_8_16_write, .read = snd_soc_8_16_read, | |
677 | .i2c_read = snd_soc_8_16_read_i2c, | |
f479fd93 | 678 | .spi_write = snd_soc_8_16_spi_write, |
d62ab358 | 679 | }, |
994dc424 BS |
680 | { |
681 | .addr_bits = 16, .data_bits = 8, | |
682 | .write = snd_soc_16_8_write, .read = snd_soc_16_8_read, | |
683 | .i2c_read = snd_soc_16_8_read_i2c, | |
684 | .spi_write = snd_soc_16_8_spi_write, | |
685 | }, | |
bc6552f4 MB |
686 | { |
687 | .addr_bits = 16, .data_bits = 16, | |
688 | .write = snd_soc_16_16_write, .read = snd_soc_16_16_read, | |
689 | .i2c_read = snd_soc_16_16_read_i2c, | |
f479fd93 | 690 | .spi_write = snd_soc_16_16_spi_write, |
bc6552f4 | 691 | }, |
17a52fd6 MB |
692 | }; |
693 | ||
694 | /** | |
695 | * snd_soc_codec_set_cache_io: Set up standard I/O functions. | |
696 | * | |
697 | * @codec: CODEC to configure. | |
698 | * @type: Type of cache. | |
699 | * @addr_bits: Number of bits of register address data. | |
700 | * @data_bits: Number of bits of data per register. | |
7084a42b | 701 | * @control: Control bus used. |
17a52fd6 MB |
702 | * |
703 | * Register formats are frequently shared between many I2C and SPI | |
704 | * devices. In order to promote code reuse the ASoC core provides | |
705 | * some standard implementations of CODEC read and write operations | |
706 | * which can be set up using this function. | |
707 | * | |
708 | * The caller is responsible for allocating and initialising the | |
709 | * actual cache. | |
710 | * | |
711 | * Note that at present this code cannot be used by CODECs with | |
712 | * volatile registers. | |
713 | */ | |
714 | int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, | |
7084a42b MB |
715 | int addr_bits, int data_bits, |
716 | enum snd_soc_control_type control) | |
17a52fd6 MB |
717 | { |
718 | int i; | |
719 | ||
17a52fd6 MB |
720 | for (i = 0; i < ARRAY_SIZE(io_types); i++) |
721 | if (io_types[i].addr_bits == addr_bits && | |
722 | io_types[i].data_bits == data_bits) | |
723 | break; | |
724 | if (i == ARRAY_SIZE(io_types)) { | |
725 | printk(KERN_ERR | |
726 | "No I/O functions for %d bit address %d bit data\n", | |
727 | addr_bits, data_bits); | |
728 | return -EINVAL; | |
729 | } | |
730 | ||
c3acec26 MB |
731 | codec->write = io_types[i].write; |
732 | codec->read = io_types[i].read; | |
17a52fd6 | 733 | |
7084a42b MB |
734 | switch (control) { |
735 | case SND_SOC_CUSTOM: | |
736 | break; | |
737 | ||
738 | case SND_SOC_I2C: | |
17244c24 | 739 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
7084a42b MB |
740 | codec->hw_write = (hw_write_t)i2c_master_send; |
741 | #endif | |
afa2f106 MB |
742 | if (io_types[i].i2c_read) |
743 | codec->hw_read = io_types[i].i2c_read; | |
a6d14342 MB |
744 | |
745 | codec->control_data = container_of(codec->dev, | |
746 | struct i2c_client, | |
747 | dev); | |
7084a42b MB |
748 | break; |
749 | ||
750 | case SND_SOC_SPI: | |
27ded041 MB |
751 | if (io_types[i].spi_write) |
752 | codec->hw_write = io_types[i].spi_write; | |
a6d14342 MB |
753 | |
754 | codec->control_data = container_of(codec->dev, | |
755 | struct spi_device, | |
756 | dev); | |
7084a42b MB |
757 | break; |
758 | } | |
759 | ||
17a52fd6 MB |
760 | return 0; |
761 | } | |
762 | EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io); | |
7a30a3db | 763 | |
a7f387d5 DP |
764 | struct snd_soc_rbtree_node { |
765 | struct rb_node node; | |
766 | unsigned int reg; | |
767 | unsigned int value; | |
768 | unsigned int defval; | |
769 | } __attribute__ ((packed)); | |
770 | ||
771 | struct snd_soc_rbtree_ctx { | |
772 | struct rb_root root; | |
773 | }; | |
774 | ||
775 | static struct snd_soc_rbtree_node *snd_soc_rbtree_lookup( | |
776 | struct rb_root *root, unsigned int reg) | |
777 | { | |
778 | struct rb_node *node; | |
779 | struct snd_soc_rbtree_node *rbnode; | |
780 | ||
781 | node = root->rb_node; | |
782 | while (node) { | |
783 | rbnode = container_of(node, struct snd_soc_rbtree_node, node); | |
784 | if (rbnode->reg < reg) | |
785 | node = node->rb_left; | |
786 | else if (rbnode->reg > reg) | |
787 | node = node->rb_right; | |
788 | else | |
789 | return rbnode; | |
790 | } | |
791 | ||
792 | return NULL; | |
793 | } | |
794 | ||
a7f387d5 DP |
795 | static int snd_soc_rbtree_insert(struct rb_root *root, |
796 | struct snd_soc_rbtree_node *rbnode) | |
797 | { | |
798 | struct rb_node **new, *parent; | |
799 | struct snd_soc_rbtree_node *rbnode_tmp; | |
800 | ||
801 | parent = NULL; | |
802 | new = &root->rb_node; | |
803 | while (*new) { | |
804 | rbnode_tmp = container_of(*new, struct snd_soc_rbtree_node, | |
805 | node); | |
806 | parent = *new; | |
807 | if (rbnode_tmp->reg < rbnode->reg) | |
808 | new = &((*new)->rb_left); | |
809 | else if (rbnode_tmp->reg > rbnode->reg) | |
810 | new = &((*new)->rb_right); | |
811 | else | |
812 | return 0; | |
813 | } | |
814 | ||
815 | /* insert the node into the rbtree */ | |
816 | rb_link_node(&rbnode->node, parent, new); | |
817 | rb_insert_color(&rbnode->node, root); | |
818 | ||
819 | return 1; | |
820 | } | |
821 | ||
822 | static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec) | |
823 | { | |
824 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
825 | struct rb_node *node; | |
826 | struct snd_soc_rbtree_node *rbnode; | |
827 | unsigned int val; | |
7a33d4ce | 828 | int ret; |
a7f387d5 DP |
829 | |
830 | rbtree_ctx = codec->reg_cache; | |
831 | for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) { | |
832 | rbnode = rb_entry(node, struct snd_soc_rbtree_node, node); | |
833 | if (rbnode->value == rbnode->defval) | |
834 | continue; | |
7a33d4ce DP |
835 | ret = snd_soc_cache_read(codec, rbnode->reg, &val); |
836 | if (ret) | |
837 | return ret; | |
838 | ret = snd_soc_write(codec, rbnode->reg, val); | |
839 | if (ret) | |
840 | return ret; | |
a7f387d5 DP |
841 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
842 | rbnode->reg, val); | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | static int snd_soc_rbtree_cache_write(struct snd_soc_codec *codec, | |
849 | unsigned int reg, unsigned int value) | |
850 | { | |
851 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
852 | struct snd_soc_rbtree_node *rbnode; | |
853 | ||
854 | rbtree_ctx = codec->reg_cache; | |
855 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); | |
856 | if (rbnode) { | |
857 | if (rbnode->value == value) | |
858 | return 0; | |
859 | rbnode->value = value; | |
860 | } else { | |
861 | /* bail out early, no need to create the rbnode yet */ | |
862 | if (!value) | |
863 | return 0; | |
864 | /* | |
865 | * for uninitialized registers whose value is changed | |
866 | * from the default zero, create an rbnode and insert | |
867 | * it into the tree. | |
868 | */ | |
869 | rbnode = kzalloc(sizeof *rbnode, GFP_KERNEL); | |
870 | if (!rbnode) | |
871 | return -ENOMEM; | |
872 | rbnode->reg = reg; | |
873 | rbnode->value = value; | |
874 | snd_soc_rbtree_insert(&rbtree_ctx->root, rbnode); | |
875 | } | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
880 | static int snd_soc_rbtree_cache_read(struct snd_soc_codec *codec, | |
881 | unsigned int reg, unsigned int *value) | |
882 | { | |
883 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
884 | struct snd_soc_rbtree_node *rbnode; | |
885 | ||
886 | rbtree_ctx = codec->reg_cache; | |
887 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); | |
888 | if (rbnode) { | |
889 | *value = rbnode->value; | |
890 | } else { | |
891 | /* uninitialized registers default to 0 */ | |
892 | *value = 0; | |
893 | } | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec) | |
899 | { | |
900 | struct rb_node *next; | |
901 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
902 | struct snd_soc_rbtree_node *rbtree_node; | |
903 | ||
904 | /* if we've already been called then just return */ | |
905 | rbtree_ctx = codec->reg_cache; | |
906 | if (!rbtree_ctx) | |
907 | return 0; | |
908 | ||
909 | /* free up the rbtree */ | |
910 | next = rb_first(&rbtree_ctx->root); | |
911 | while (next) { | |
912 | rbtree_node = rb_entry(next, struct snd_soc_rbtree_node, node); | |
913 | next = rb_next(&rbtree_node->node); | |
914 | rb_erase(&rbtree_node->node, &rbtree_ctx->root); | |
915 | kfree(rbtree_node); | |
916 | } | |
917 | ||
918 | /* release the resources */ | |
919 | kfree(codec->reg_cache); | |
920 | codec->reg_cache = NULL; | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec) | |
926 | { | |
927 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
928 | ||
929 | codec->reg_cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL); | |
930 | if (!codec->reg_cache) | |
931 | return -ENOMEM; | |
932 | ||
933 | rbtree_ctx = codec->reg_cache; | |
934 | rbtree_ctx->root = RB_ROOT; | |
935 | ||
3335ddca | 936 | if (!codec->reg_def_copy) |
a7f387d5 DP |
937 | return 0; |
938 | ||
939 | /* | |
940 | * populate the rbtree with the initialized registers. All other | |
941 | * registers will be inserted into the tree when they are first written. | |
942 | * | |
943 | * The reasoning behind this, is that we need to step through and | |
944 | * dereference the cache in u8/u16 increments without sacrificing | |
945 | * portability. This could also be done using memcpy() but that would | |
946 | * be slightly more cryptic. | |
947 | */ | |
948 | #define snd_soc_rbtree_populate(cache) \ | |
949 | ({ \ | |
950 | int ret, i; \ | |
951 | struct snd_soc_rbtree_node *rbtree_node; \ | |
952 | \ | |
953 | ret = 0; \ | |
3335ddca | 954 | cache = codec->reg_def_copy; \ |
a7f387d5 DP |
955 | for (i = 0; i < codec->driver->reg_cache_size; ++i) { \ |
956 | if (!cache[i]) \ | |
957 | continue; \ | |
958 | rbtree_node = kzalloc(sizeof *rbtree_node, GFP_KERNEL); \ | |
959 | if (!rbtree_node) { \ | |
960 | ret = -ENOMEM; \ | |
961 | snd_soc_cache_exit(codec); \ | |
962 | break; \ | |
963 | } \ | |
964 | rbtree_node->reg = i; \ | |
965 | rbtree_node->value = cache[i]; \ | |
966 | rbtree_node->defval = cache[i]; \ | |
967 | snd_soc_rbtree_insert(&rbtree_ctx->root, \ | |
968 | rbtree_node); \ | |
969 | } \ | |
970 | ret; \ | |
971 | }) | |
972 | ||
973 | switch (codec->driver->reg_word_size) { | |
974 | case 1: { | |
975 | const u8 *cache; | |
976 | ||
977 | return snd_soc_rbtree_populate(cache); | |
978 | } | |
979 | case 2: { | |
980 | const u16 *cache; | |
981 | ||
982 | return snd_soc_rbtree_populate(cache); | |
983 | } | |
984 | default: | |
985 | BUG(); | |
986 | } | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
cc28fb8e DP |
991 | struct snd_soc_lzo_ctx { |
992 | void *wmem; | |
993 | void *dst; | |
994 | const void *src; | |
995 | size_t src_len; | |
996 | size_t dst_len; | |
997 | size_t decompressed_size; | |
998 | unsigned long *sync_bmp; | |
999 | int sync_bmp_nbits; | |
1000 | }; | |
1001 | ||
1002 | #define LZO_BLOCK_NUM 8 | |
1003 | static int snd_soc_lzo_block_count(void) | |
1004 | { | |
1005 | return LZO_BLOCK_NUM; | |
1006 | } | |
1007 | ||
1008 | static int snd_soc_lzo_prepare(struct snd_soc_lzo_ctx *lzo_ctx) | |
1009 | { | |
1010 | lzo_ctx->wmem = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); | |
1011 | if (!lzo_ctx->wmem) | |
1012 | return -ENOMEM; | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static int snd_soc_lzo_compress(struct snd_soc_lzo_ctx *lzo_ctx) | |
1017 | { | |
1018 | size_t compress_size; | |
1019 | int ret; | |
1020 | ||
1021 | ret = lzo1x_1_compress(lzo_ctx->src, lzo_ctx->src_len, | |
1022 | lzo_ctx->dst, &compress_size, lzo_ctx->wmem); | |
1023 | if (ret != LZO_E_OK || compress_size > lzo_ctx->dst_len) | |
1024 | return -EINVAL; | |
1025 | lzo_ctx->dst_len = compress_size; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static int snd_soc_lzo_decompress(struct snd_soc_lzo_ctx *lzo_ctx) | |
1030 | { | |
1031 | size_t dst_len; | |
1032 | int ret; | |
1033 | ||
1034 | dst_len = lzo_ctx->dst_len; | |
1035 | ret = lzo1x_decompress_safe(lzo_ctx->src, lzo_ctx->src_len, | |
1036 | lzo_ctx->dst, &dst_len); | |
1037 | if (ret != LZO_E_OK || dst_len != lzo_ctx->dst_len) | |
1038 | return -EINVAL; | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static int snd_soc_lzo_compress_cache_block(struct snd_soc_codec *codec, | |
1043 | struct snd_soc_lzo_ctx *lzo_ctx) | |
1044 | { | |
1045 | int ret; | |
1046 | ||
1047 | lzo_ctx->dst_len = lzo1x_worst_compress(PAGE_SIZE); | |
1048 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); | |
1049 | if (!lzo_ctx->dst) { | |
1050 | lzo_ctx->dst_len = 0; | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
1054 | ret = snd_soc_lzo_compress(lzo_ctx); | |
1055 | if (ret < 0) | |
1056 | return ret; | |
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | static int snd_soc_lzo_decompress_cache_block(struct snd_soc_codec *codec, | |
1061 | struct snd_soc_lzo_ctx *lzo_ctx) | |
1062 | { | |
1063 | int ret; | |
1064 | ||
1065 | lzo_ctx->dst_len = lzo_ctx->decompressed_size; | |
1066 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); | |
1067 | if (!lzo_ctx->dst) { | |
1068 | lzo_ctx->dst_len = 0; | |
1069 | return -ENOMEM; | |
1070 | } | |
1071 | ||
1072 | ret = snd_soc_lzo_decompress(lzo_ctx); | |
1073 | if (ret < 0) | |
1074 | return ret; | |
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec, | |
1079 | unsigned int reg) | |
1080 | { | |
1081 | struct snd_soc_codec_driver *codec_drv; | |
1082 | size_t reg_size; | |
1083 | ||
1084 | codec_drv = codec->driver; | |
1085 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; | |
1086 | return (reg * codec_drv->reg_word_size) / | |
1087 | DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()); | |
1088 | } | |
1089 | ||
1090 | static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec, | |
1091 | unsigned int reg) | |
1092 | { | |
1093 | struct snd_soc_codec_driver *codec_drv; | |
1094 | size_t reg_size; | |
1095 | ||
1096 | codec_drv = codec->driver; | |
1097 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; | |
1098 | return reg % (DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()) / | |
1099 | codec_drv->reg_word_size); | |
1100 | } | |
1101 | ||
1102 | static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec) | |
1103 | { | |
1104 | struct snd_soc_codec_driver *codec_drv; | |
1105 | size_t reg_size; | |
1106 | ||
1107 | codec_drv = codec->driver; | |
1108 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; | |
1109 | return DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()); | |
1110 | } | |
1111 | ||
1112 | static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec) | |
1113 | { | |
1114 | struct snd_soc_lzo_ctx **lzo_blocks; | |
1115 | unsigned int val; | |
1116 | int i; | |
7a33d4ce | 1117 | int ret; |
cc28fb8e DP |
1118 | |
1119 | lzo_blocks = codec->reg_cache; | |
1120 | for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { | |
7a33d4ce DP |
1121 | ret = snd_soc_cache_read(codec, i, &val); |
1122 | if (ret) | |
1123 | return ret; | |
1124 | ret = snd_soc_write(codec, i, val); | |
1125 | if (ret) | |
1126 | return ret; | |
cc28fb8e DP |
1127 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
1128 | i, val); | |
1129 | } | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static int snd_soc_lzo_cache_write(struct snd_soc_codec *codec, | |
1135 | unsigned int reg, unsigned int value) | |
1136 | { | |
1137 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; | |
1138 | int ret, blkindex, blkpos; | |
1139 | size_t blksize, tmp_dst_len; | |
1140 | void *tmp_dst; | |
1141 | ||
1142 | /* index of the compressed lzo block */ | |
1143 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); | |
1144 | /* register index within the decompressed block */ | |
1145 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); | |
1146 | /* size of the compressed block */ | |
1147 | blksize = snd_soc_lzo_get_blksize(codec); | |
1148 | lzo_blocks = codec->reg_cache; | |
1149 | lzo_block = lzo_blocks[blkindex]; | |
1150 | ||
1151 | /* save the pointer and length of the compressed block */ | |
1152 | tmp_dst = lzo_block->dst; | |
1153 | tmp_dst_len = lzo_block->dst_len; | |
1154 | ||
1155 | /* prepare the source to be the compressed block */ | |
1156 | lzo_block->src = lzo_block->dst; | |
1157 | lzo_block->src_len = lzo_block->dst_len; | |
1158 | ||
1159 | /* decompress the block */ | |
1160 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); | |
1161 | if (ret < 0) { | |
1162 | kfree(lzo_block->dst); | |
1163 | goto out; | |
1164 | } | |
1165 | ||
1166 | /* write the new value to the cache */ | |
1167 | switch (codec->driver->reg_word_size) { | |
1168 | case 1: { | |
1169 | u8 *cache; | |
1170 | cache = lzo_block->dst; | |
1171 | if (cache[blkpos] == value) { | |
1172 | kfree(lzo_block->dst); | |
1173 | goto out; | |
1174 | } | |
1175 | cache[blkpos] = value; | |
1176 | } | |
1177 | break; | |
1178 | case 2: { | |
1179 | u16 *cache; | |
1180 | cache = lzo_block->dst; | |
1181 | if (cache[blkpos] == value) { | |
1182 | kfree(lzo_block->dst); | |
1183 | goto out; | |
1184 | } | |
1185 | cache[blkpos] = value; | |
1186 | } | |
1187 | break; | |
1188 | default: | |
1189 | BUG(); | |
1190 | } | |
1191 | ||
1192 | /* prepare the source to be the decompressed block */ | |
1193 | lzo_block->src = lzo_block->dst; | |
1194 | lzo_block->src_len = lzo_block->dst_len; | |
1195 | ||
1196 | /* compress the block */ | |
1197 | ret = snd_soc_lzo_compress_cache_block(codec, lzo_block); | |
1198 | if (ret < 0) { | |
1199 | kfree(lzo_block->dst); | |
1200 | kfree(lzo_block->src); | |
1201 | goto out; | |
1202 | } | |
1203 | ||
1204 | /* set the bit so we know we have to sync this register */ | |
1205 | set_bit(reg, lzo_block->sync_bmp); | |
1206 | kfree(tmp_dst); | |
1207 | kfree(lzo_block->src); | |
1208 | return 0; | |
1209 | out: | |
1210 | lzo_block->dst = tmp_dst; | |
1211 | lzo_block->dst_len = tmp_dst_len; | |
1212 | return ret; | |
1213 | } | |
1214 | ||
1215 | static int snd_soc_lzo_cache_read(struct snd_soc_codec *codec, | |
1216 | unsigned int reg, unsigned int *value) | |
1217 | { | |
1218 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; | |
1219 | int ret, blkindex, blkpos; | |
1220 | size_t blksize, tmp_dst_len; | |
1221 | void *tmp_dst; | |
1222 | ||
1223 | *value = 0; | |
1224 | /* index of the compressed lzo block */ | |
1225 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); | |
1226 | /* register index within the decompressed block */ | |
1227 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); | |
1228 | /* size of the compressed block */ | |
1229 | blksize = snd_soc_lzo_get_blksize(codec); | |
1230 | lzo_blocks = codec->reg_cache; | |
1231 | lzo_block = lzo_blocks[blkindex]; | |
1232 | ||
1233 | /* save the pointer and length of the compressed block */ | |
1234 | tmp_dst = lzo_block->dst; | |
1235 | tmp_dst_len = lzo_block->dst_len; | |
1236 | ||
1237 | /* prepare the source to be the compressed block */ | |
1238 | lzo_block->src = lzo_block->dst; | |
1239 | lzo_block->src_len = lzo_block->dst_len; | |
1240 | ||
1241 | /* decompress the block */ | |
1242 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); | |
1243 | if (ret >= 0) { | |
1244 | /* fetch the value from the cache */ | |
1245 | switch (codec->driver->reg_word_size) { | |
1246 | case 1: { | |
1247 | u8 *cache; | |
1248 | cache = lzo_block->dst; | |
1249 | *value = cache[blkpos]; | |
1250 | } | |
1251 | break; | |
1252 | case 2: { | |
1253 | u16 *cache; | |
1254 | cache = lzo_block->dst; | |
1255 | *value = cache[blkpos]; | |
1256 | } | |
1257 | break; | |
1258 | default: | |
1259 | BUG(); | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | kfree(lzo_block->dst); | |
1264 | /* restore the pointer and length of the compressed block */ | |
1265 | lzo_block->dst = tmp_dst; | |
1266 | lzo_block->dst_len = tmp_dst_len; | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static int snd_soc_lzo_cache_exit(struct snd_soc_codec *codec) | |
1271 | { | |
1272 | struct snd_soc_lzo_ctx **lzo_blocks; | |
1273 | int i, blkcount; | |
1274 | ||
1275 | lzo_blocks = codec->reg_cache; | |
1276 | if (!lzo_blocks) | |
1277 | return 0; | |
1278 | ||
1279 | blkcount = snd_soc_lzo_block_count(); | |
1280 | /* | |
1281 | * the pointer to the bitmap used for syncing the cache | |
1282 | * is shared amongst all lzo_blocks. Ensure it is freed | |
1283 | * only once. | |
1284 | */ | |
1285 | if (lzo_blocks[0]) | |
1286 | kfree(lzo_blocks[0]->sync_bmp); | |
1287 | for (i = 0; i < blkcount; ++i) { | |
1288 | if (lzo_blocks[i]) { | |
1289 | kfree(lzo_blocks[i]->wmem); | |
1290 | kfree(lzo_blocks[i]->dst); | |
1291 | } | |
1292 | /* each lzo_block is a pointer returned by kmalloc or NULL */ | |
1293 | kfree(lzo_blocks[i]); | |
1294 | } | |
1295 | kfree(lzo_blocks); | |
1296 | codec->reg_cache = NULL; | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec) | |
1301 | { | |
1302 | struct snd_soc_lzo_ctx **lzo_blocks; | |
1303 | size_t reg_size, bmp_size; | |
1304 | struct snd_soc_codec_driver *codec_drv; | |
1305 | int ret, tofree, i, blksize, blkcount; | |
1306 | const char *p, *end; | |
1307 | unsigned long *sync_bmp; | |
1308 | ||
1309 | ret = 0; | |
1310 | codec_drv = codec->driver; | |
1311 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; | |
1312 | ||
1313 | /* | |
1314 | * If we have not been given a default register cache | |
1315 | * then allocate a dummy zero-ed out region, compress it | |
1316 | * and remember to free it afterwards. | |
1317 | */ | |
1318 | tofree = 0; | |
3335ddca | 1319 | if (!codec->reg_def_copy) |
cc28fb8e DP |
1320 | tofree = 1; |
1321 | ||
3335ddca DP |
1322 | if (!codec->reg_def_copy) { |
1323 | codec->reg_def_copy = kzalloc(reg_size, | |
cc28fb8e | 1324 | GFP_KERNEL); |
3335ddca | 1325 | if (!codec->reg_def_copy) |
cc28fb8e DP |
1326 | return -ENOMEM; |
1327 | } | |
1328 | ||
1329 | blkcount = snd_soc_lzo_block_count(); | |
1330 | codec->reg_cache = kzalloc(blkcount * sizeof *lzo_blocks, | |
1331 | GFP_KERNEL); | |
1332 | if (!codec->reg_cache) { | |
1333 | ret = -ENOMEM; | |
1334 | goto err_tofree; | |
1335 | } | |
1336 | lzo_blocks = codec->reg_cache; | |
1337 | ||
1338 | /* | |
1339 | * allocate a bitmap to be used when syncing the cache with | |
1340 | * the hardware. Each time a register is modified, the corresponding | |
1341 | * bit is set in the bitmap, so we know that we have to sync | |
1342 | * that register. | |
1343 | */ | |
1344 | bmp_size = codec_drv->reg_cache_size; | |
1345 | sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof (long), | |
1346 | GFP_KERNEL); | |
1347 | if (!sync_bmp) { | |
1348 | ret = -ENOMEM; | |
1349 | goto err; | |
1350 | } | |
09c74a9d | 1351 | bitmap_zero(sync_bmp, bmp_size); |
cc28fb8e DP |
1352 | |
1353 | /* allocate the lzo blocks and initialize them */ | |
1354 | for (i = 0; i < blkcount; ++i) { | |
1355 | lzo_blocks[i] = kzalloc(sizeof **lzo_blocks, | |
1356 | GFP_KERNEL); | |
1357 | if (!lzo_blocks[i]) { | |
1358 | kfree(sync_bmp); | |
1359 | ret = -ENOMEM; | |
1360 | goto err; | |
1361 | } | |
1362 | lzo_blocks[i]->sync_bmp = sync_bmp; | |
1363 | lzo_blocks[i]->sync_bmp_nbits = reg_size; | |
1364 | /* alloc the working space for the compressed block */ | |
1365 | ret = snd_soc_lzo_prepare(lzo_blocks[i]); | |
1366 | if (ret < 0) | |
1367 | goto err; | |
1368 | } | |
1369 | ||
1370 | blksize = snd_soc_lzo_get_blksize(codec); | |
3335ddca DP |
1371 | p = codec->reg_def_copy; |
1372 | end = codec->reg_def_copy + reg_size; | |
cc28fb8e DP |
1373 | /* compress the register map and fill the lzo blocks */ |
1374 | for (i = 0; i < blkcount; ++i, p += blksize) { | |
1375 | lzo_blocks[i]->src = p; | |
1376 | if (p + blksize > end) | |
1377 | lzo_blocks[i]->src_len = end - p; | |
1378 | else | |
1379 | lzo_blocks[i]->src_len = blksize; | |
1380 | ret = snd_soc_lzo_compress_cache_block(codec, | |
1381 | lzo_blocks[i]); | |
1382 | if (ret < 0) | |
1383 | goto err; | |
1384 | lzo_blocks[i]->decompressed_size = | |
1385 | lzo_blocks[i]->src_len; | |
1386 | } | |
1387 | ||
3335ddca DP |
1388 | if (tofree) { |
1389 | kfree(codec->reg_def_copy); | |
1390 | codec->reg_def_copy = NULL; | |
1391 | } | |
cc28fb8e DP |
1392 | return 0; |
1393 | err: | |
1394 | snd_soc_cache_exit(codec); | |
1395 | err_tofree: | |
3335ddca DP |
1396 | if (tofree) { |
1397 | kfree(codec->reg_def_copy); | |
1398 | codec->reg_def_copy = NULL; | |
1399 | } | |
cc28fb8e DP |
1400 | return ret; |
1401 | } | |
1402 | ||
7a30a3db DP |
1403 | static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec) |
1404 | { | |
1405 | int i; | |
7a33d4ce | 1406 | int ret; |
7a30a3db DP |
1407 | struct snd_soc_codec_driver *codec_drv; |
1408 | unsigned int val; | |
1409 | ||
1410 | codec_drv = codec->driver; | |
1411 | for (i = 0; i < codec_drv->reg_cache_size; ++i) { | |
7a33d4ce DP |
1412 | ret = snd_soc_cache_read(codec, i, &val); |
1413 | if (ret) | |
1414 | return ret; | |
7a30a3db DP |
1415 | if (codec_drv->reg_cache_default) { |
1416 | switch (codec_drv->reg_word_size) { | |
1417 | case 1: { | |
1418 | const u8 *cache; | |
1419 | ||
1420 | cache = codec_drv->reg_cache_default; | |
1421 | if (cache[i] == val) | |
1422 | continue; | |
1423 | } | |
1424 | break; | |
1425 | case 2: { | |
1426 | const u16 *cache; | |
1427 | ||
1428 | cache = codec_drv->reg_cache_default; | |
1429 | if (cache[i] == val) | |
1430 | continue; | |
1431 | } | |
1432 | break; | |
1433 | default: | |
1434 | BUG(); | |
1435 | } | |
1436 | } | |
7a33d4ce DP |
1437 | ret = snd_soc_write(codec, i, val); |
1438 | if (ret) | |
1439 | return ret; | |
7a30a3db DP |
1440 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
1441 | i, val); | |
1442 | } | |
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int snd_soc_flat_cache_write(struct snd_soc_codec *codec, | |
1447 | unsigned int reg, unsigned int value) | |
1448 | { | |
1449 | switch (codec->driver->reg_word_size) { | |
1450 | case 1: { | |
1451 | u8 *cache; | |
1452 | ||
1453 | cache = codec->reg_cache; | |
1454 | cache[reg] = value; | |
1455 | } | |
1456 | break; | |
1457 | case 2: { | |
1458 | u16 *cache; | |
1459 | ||
1460 | cache = codec->reg_cache; | |
1461 | cache[reg] = value; | |
1462 | } | |
1463 | break; | |
1464 | default: | |
1465 | BUG(); | |
1466 | } | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | static int snd_soc_flat_cache_read(struct snd_soc_codec *codec, | |
1472 | unsigned int reg, unsigned int *value) | |
1473 | { | |
1474 | switch (codec->driver->reg_word_size) { | |
1475 | case 1: { | |
1476 | u8 *cache; | |
1477 | ||
1478 | cache = codec->reg_cache; | |
1479 | *value = cache[reg]; | |
1480 | } | |
1481 | break; | |
1482 | case 2: { | |
1483 | u16 *cache; | |
1484 | ||
1485 | cache = codec->reg_cache; | |
1486 | *value = cache[reg]; | |
1487 | } | |
1488 | break; | |
1489 | default: | |
1490 | BUG(); | |
1491 | } | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec) | |
1497 | { | |
1498 | if (!codec->reg_cache) | |
1499 | return 0; | |
1500 | kfree(codec->reg_cache); | |
1501 | codec->reg_cache = NULL; | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static int snd_soc_flat_cache_init(struct snd_soc_codec *codec) | |
1506 | { | |
1507 | struct snd_soc_codec_driver *codec_drv; | |
1508 | size_t reg_size; | |
1509 | ||
1510 | codec_drv = codec->driver; | |
1511 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; | |
1512 | ||
3335ddca DP |
1513 | /* |
1514 | * for flat compression, we don't need to keep a copy of the | |
1515 | * original defaults register cache as it will definitely not | |
1516 | * be marked as __devinitconst | |
1517 | */ | |
1518 | kfree(codec->reg_def_copy); | |
1519 | codec->reg_def_copy = NULL; | |
1520 | ||
7a30a3db DP |
1521 | if (codec_drv->reg_cache_default) |
1522 | codec->reg_cache = kmemdup(codec_drv->reg_cache_default, | |
1523 | reg_size, GFP_KERNEL); | |
1524 | else | |
1525 | codec->reg_cache = kzalloc(reg_size, GFP_KERNEL); | |
1526 | if (!codec->reg_cache) | |
1527 | return -ENOMEM; | |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | /* an array of all supported compression types */ | |
1533 | static const struct snd_soc_cache_ops cache_types[] = { | |
1534 | { | |
df0701bb | 1535 | .id = SND_SOC_FLAT_COMPRESSION, |
7a30a3db DP |
1536 | .init = snd_soc_flat_cache_init, |
1537 | .exit = snd_soc_flat_cache_exit, | |
1538 | .read = snd_soc_flat_cache_read, | |
1539 | .write = snd_soc_flat_cache_write, | |
1540 | .sync = snd_soc_flat_cache_sync | |
cc28fb8e DP |
1541 | }, |
1542 | { | |
1543 | .id = SND_SOC_LZO_COMPRESSION, | |
1544 | .init = snd_soc_lzo_cache_init, | |
1545 | .exit = snd_soc_lzo_cache_exit, | |
1546 | .read = snd_soc_lzo_cache_read, | |
1547 | .write = snd_soc_lzo_cache_write, | |
1548 | .sync = snd_soc_lzo_cache_sync | |
a7f387d5 DP |
1549 | }, |
1550 | { | |
1551 | .id = SND_SOC_RBTREE_COMPRESSION, | |
1552 | .init = snd_soc_rbtree_cache_init, | |
1553 | .exit = snd_soc_rbtree_cache_exit, | |
1554 | .read = snd_soc_rbtree_cache_read, | |
1555 | .write = snd_soc_rbtree_cache_write, | |
1556 | .sync = snd_soc_rbtree_cache_sync | |
7a30a3db DP |
1557 | } |
1558 | }; | |
1559 | ||
1560 | int snd_soc_cache_init(struct snd_soc_codec *codec) | |
1561 | { | |
1562 | int i; | |
1563 | ||
1564 | for (i = 0; i < ARRAY_SIZE(cache_types); ++i) | |
23bbce34 | 1565 | if (cache_types[i].id == codec->compress_type) |
7a30a3db DP |
1566 | break; |
1567 | if (i == ARRAY_SIZE(cache_types)) { | |
1568 | dev_err(codec->dev, "Could not match compress type: %d\n", | |
23bbce34 | 1569 | codec->compress_type); |
7a30a3db DP |
1570 | return -EINVAL; |
1571 | } | |
1572 | ||
1573 | mutex_init(&codec->cache_rw_mutex); | |
1574 | codec->cache_ops = &cache_types[i]; | |
1575 | ||
1576 | if (codec->cache_ops->init) | |
1577 | return codec->cache_ops->init(codec); | |
1578 | return -EINVAL; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * NOTE: keep in mind that this function might be called | |
1583 | * multiple times. | |
1584 | */ | |
1585 | int snd_soc_cache_exit(struct snd_soc_codec *codec) | |
1586 | { | |
1587 | if (codec->cache_ops && codec->cache_ops->exit) | |
1588 | return codec->cache_ops->exit(codec); | |
1589 | return -EINVAL; | |
1590 | } | |
1591 | ||
1592 | /** | |
1593 | * snd_soc_cache_read: Fetch the value of a given register from the cache. | |
1594 | * | |
1595 | * @codec: CODEC to configure. | |
1596 | * @reg: The register index. | |
1597 | * @value: The value to be returned. | |
1598 | */ | |
1599 | int snd_soc_cache_read(struct snd_soc_codec *codec, | |
1600 | unsigned int reg, unsigned int *value) | |
1601 | { | |
1602 | int ret; | |
1603 | ||
1604 | mutex_lock(&codec->cache_rw_mutex); | |
1605 | ||
1606 | if (value && codec->cache_ops && codec->cache_ops->read) { | |
1607 | ret = codec->cache_ops->read(codec, reg, value); | |
1608 | mutex_unlock(&codec->cache_rw_mutex); | |
1609 | return ret; | |
1610 | } | |
1611 | ||
1612 | mutex_unlock(&codec->cache_rw_mutex); | |
1613 | return -EINVAL; | |
1614 | } | |
1615 | EXPORT_SYMBOL_GPL(snd_soc_cache_read); | |
1616 | ||
1617 | /** | |
1618 | * snd_soc_cache_write: Set the value of a given register in the cache. | |
1619 | * | |
1620 | * @codec: CODEC to configure. | |
1621 | * @reg: The register index. | |
1622 | * @value: The new register value. | |
1623 | */ | |
1624 | int snd_soc_cache_write(struct snd_soc_codec *codec, | |
1625 | unsigned int reg, unsigned int value) | |
1626 | { | |
1627 | int ret; | |
1628 | ||
1629 | mutex_lock(&codec->cache_rw_mutex); | |
1630 | ||
1631 | if (codec->cache_ops && codec->cache_ops->write) { | |
1632 | ret = codec->cache_ops->write(codec, reg, value); | |
1633 | mutex_unlock(&codec->cache_rw_mutex); | |
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | mutex_unlock(&codec->cache_rw_mutex); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | EXPORT_SYMBOL_GPL(snd_soc_cache_write); | |
1641 | ||
1642 | /** | |
1643 | * snd_soc_cache_sync: Sync the register cache with the hardware. | |
1644 | * | |
1645 | * @codec: CODEC to configure. | |
1646 | * | |
1647 | * Any registers that should not be synced should be marked as | |
1648 | * volatile. In general drivers can choose not to use the provided | |
1649 | * syncing functionality if they so require. | |
1650 | */ | |
1651 | int snd_soc_cache_sync(struct snd_soc_codec *codec) | |
1652 | { | |
1653 | int ret; | |
1654 | ||
1655 | if (!codec->cache_sync) { | |
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | if (codec->cache_ops && codec->cache_ops->sync) { | |
1660 | ret = codec->cache_ops->sync(codec); | |
1661 | if (!ret) | |
1662 | codec->cache_sync = 0; | |
1663 | return ret; | |
1664 | } | |
1665 | ||
1666 | return -EINVAL; | |
1667 | } | |
1668 | EXPORT_SYMBOL_GPL(snd_soc_cache_sync); |