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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> |
d81a6d71 | 20 | #include <linux/export.h> |
17a52fd6 | 21 | |
c358e640 DP |
22 | #include <trace/events/asoc.h> |
23 | ||
1321e883 DP |
24 | static bool snd_soc_set_cache_val(void *base, unsigned int idx, |
25 | unsigned int val, unsigned int word_size) | |
26 | { | |
27 | switch (word_size) { | |
28 | case 1: { | |
29 | u8 *cache = base; | |
30 | if (cache[idx] == val) | |
31 | return true; | |
32 | cache[idx] = val; | |
33 | break; | |
34 | } | |
35 | case 2: { | |
36 | u16 *cache = base; | |
37 | if (cache[idx] == val) | |
38 | return true; | |
39 | cache[idx] = val; | |
40 | break; | |
41 | } | |
42 | default: | |
43 | BUG(); | |
44 | } | |
45 | return false; | |
46 | } | |
47 | ||
48 | static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx, | |
49 | unsigned int word_size) | |
50 | { | |
fd137e2b MB |
51 | if (!base) |
52 | return -1; | |
53 | ||
1321e883 DP |
54 | switch (word_size) { |
55 | case 1: { | |
56 | const u8 *cache = base; | |
57 | return cache[idx]; | |
58 | } | |
59 | case 2: { | |
60 | const u16 *cache = base; | |
61 | return cache[idx]; | |
62 | } | |
63 | default: | |
64 | BUG(); | |
65 | } | |
66 | /* unreachable */ | |
67 | return -1; | |
68 | } | |
69 | ||
a7f387d5 | 70 | struct snd_soc_rbtree_node { |
0944cc39 DP |
71 | struct rb_node node; /* the actual rbtree node holding this block */ |
72 | unsigned int base_reg; /* base register handled by this block */ | |
73 | unsigned int word_size; /* number of bytes needed to represent the register index */ | |
74 | void *block; /* block of adjacent registers */ | |
75 | unsigned int blklen; /* number of registers available in the block */ | |
a7f387d5 DP |
76 | } __attribute__ ((packed)); |
77 | ||
78 | struct snd_soc_rbtree_ctx { | |
79 | struct rb_root root; | |
7e146b55 | 80 | struct snd_soc_rbtree_node *cached_rbnode; |
a7f387d5 DP |
81 | }; |
82 | ||
0944cc39 DP |
83 | static inline void snd_soc_rbtree_get_base_top_reg( |
84 | struct snd_soc_rbtree_node *rbnode, | |
85 | unsigned int *base, unsigned int *top) | |
86 | { | |
87 | *base = rbnode->base_reg; | |
88 | *top = rbnode->base_reg + rbnode->blklen - 1; | |
89 | } | |
90 | ||
91 | static unsigned int snd_soc_rbtree_get_register( | |
92 | struct snd_soc_rbtree_node *rbnode, unsigned int idx) | |
93 | { | |
94 | unsigned int val; | |
95 | ||
96 | switch (rbnode->word_size) { | |
97 | case 1: { | |
98 | u8 *p = rbnode->block; | |
99 | val = p[idx]; | |
100 | return val; | |
101 | } | |
102 | case 2: { | |
103 | u16 *p = rbnode->block; | |
104 | val = p[idx]; | |
105 | return val; | |
106 | } | |
107 | default: | |
108 | BUG(); | |
109 | break; | |
110 | } | |
111 | return -1; | |
112 | } | |
113 | ||
114 | static void snd_soc_rbtree_set_register(struct snd_soc_rbtree_node *rbnode, | |
115 | unsigned int idx, unsigned int val) | |
116 | { | |
117 | switch (rbnode->word_size) { | |
118 | case 1: { | |
119 | u8 *p = rbnode->block; | |
120 | p[idx] = val; | |
121 | break; | |
122 | } | |
123 | case 2: { | |
124 | u16 *p = rbnode->block; | |
125 | p[idx] = val; | |
126 | break; | |
127 | } | |
128 | default: | |
129 | BUG(); | |
130 | break; | |
131 | } | |
132 | } | |
133 | ||
a7f387d5 DP |
134 | static struct snd_soc_rbtree_node *snd_soc_rbtree_lookup( |
135 | struct rb_root *root, unsigned int reg) | |
136 | { | |
137 | struct rb_node *node; | |
138 | struct snd_soc_rbtree_node *rbnode; | |
0944cc39 | 139 | unsigned int base_reg, top_reg; |
a7f387d5 DP |
140 | |
141 | node = root->rb_node; | |
142 | while (node) { | |
143 | rbnode = container_of(node, struct snd_soc_rbtree_node, node); | |
0944cc39 DP |
144 | snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg); |
145 | if (reg >= base_reg && reg <= top_reg) | |
a7f387d5 | 146 | return rbnode; |
0944cc39 DP |
147 | else if (reg > top_reg) |
148 | node = node->rb_right; | |
149 | else if (reg < base_reg) | |
150 | node = node->rb_left; | |
a7f387d5 DP |
151 | } |
152 | ||
153 | return NULL; | |
154 | } | |
155 | ||
a7f387d5 DP |
156 | static int snd_soc_rbtree_insert(struct rb_root *root, |
157 | struct snd_soc_rbtree_node *rbnode) | |
158 | { | |
159 | struct rb_node **new, *parent; | |
160 | struct snd_soc_rbtree_node *rbnode_tmp; | |
0944cc39 DP |
161 | unsigned int base_reg_tmp, top_reg_tmp; |
162 | unsigned int base_reg; | |
a7f387d5 DP |
163 | |
164 | parent = NULL; | |
165 | new = &root->rb_node; | |
166 | while (*new) { | |
167 | rbnode_tmp = container_of(*new, struct snd_soc_rbtree_node, | |
168 | node); | |
0944cc39 DP |
169 | /* base and top registers of the current rbnode */ |
170 | snd_soc_rbtree_get_base_top_reg(rbnode_tmp, &base_reg_tmp, | |
171 | &top_reg_tmp); | |
172 | /* base register of the rbnode to be added */ | |
173 | base_reg = rbnode->base_reg; | |
a7f387d5 | 174 | parent = *new; |
0944cc39 DP |
175 | /* if this register has already been inserted, just return */ |
176 | if (base_reg >= base_reg_tmp && | |
177 | base_reg <= top_reg_tmp) | |
a7f387d5 | 178 | return 0; |
0944cc39 DP |
179 | else if (base_reg > top_reg_tmp) |
180 | new = &((*new)->rb_right); | |
181 | else if (base_reg < base_reg_tmp) | |
182 | new = &((*new)->rb_left); | |
a7f387d5 DP |
183 | } |
184 | ||
185 | /* insert the node into the rbtree */ | |
186 | rb_link_node(&rbnode->node, parent, new); | |
187 | rb_insert_color(&rbnode->node, root); | |
188 | ||
189 | return 1; | |
190 | } | |
191 | ||
192 | static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec) | |
193 | { | |
194 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
195 | struct rb_node *node; | |
196 | struct snd_soc_rbtree_node *rbnode; | |
0944cc39 | 197 | unsigned int regtmp; |
ffdaa48a | 198 | unsigned int val, def; |
7a33d4ce | 199 | int ret; |
0944cc39 | 200 | int i; |
a7f387d5 DP |
201 | |
202 | rbtree_ctx = codec->reg_cache; | |
203 | for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) { | |
204 | rbnode = rb_entry(node, struct snd_soc_rbtree_node, node); | |
0944cc39 DP |
205 | for (i = 0; i < rbnode->blklen; ++i) { |
206 | regtmp = rbnode->base_reg + i; | |
0944cc39 | 207 | val = snd_soc_rbtree_get_register(rbnode, i); |
ffdaa48a MB |
208 | def = snd_soc_get_cache_val(codec->reg_def_copy, i, |
209 | rbnode->word_size); | |
210 | if (val == def) | |
211 | continue; | |
212 | ||
6c5b756a LPC |
213 | WARN_ON(!snd_soc_codec_writable_register(codec, regtmp)); |
214 | ||
0944cc39 DP |
215 | codec->cache_bypass = 1; |
216 | ret = snd_soc_write(codec, regtmp, val); | |
217 | codec->cache_bypass = 0; | |
218 | if (ret) | |
219 | return ret; | |
220 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", | |
221 | regtmp, val); | |
222 | } | |
a7f387d5 DP |
223 | } |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
0944cc39 DP |
228 | static int snd_soc_rbtree_insert_to_block(struct snd_soc_rbtree_node *rbnode, |
229 | unsigned int pos, unsigned int reg, | |
230 | unsigned int value) | |
231 | { | |
232 | u8 *blk; | |
233 | ||
234 | blk = krealloc(rbnode->block, | |
235 | (rbnode->blklen + 1) * rbnode->word_size, GFP_KERNEL); | |
236 | if (!blk) | |
237 | return -ENOMEM; | |
238 | ||
239 | /* insert the register value in the correct place in the rbnode block */ | |
240 | memmove(blk + (pos + 1) * rbnode->word_size, | |
241 | blk + pos * rbnode->word_size, | |
242 | (rbnode->blklen - pos) * rbnode->word_size); | |
243 | ||
244 | /* update the rbnode block, its size and the base register */ | |
245 | rbnode->block = blk; | |
246 | rbnode->blklen++; | |
247 | if (!pos) | |
248 | rbnode->base_reg = reg; | |
249 | ||
250 | snd_soc_rbtree_set_register(rbnode, pos, value); | |
251 | return 0; | |
252 | } | |
253 | ||
a7f387d5 DP |
254 | static int snd_soc_rbtree_cache_write(struct snd_soc_codec *codec, |
255 | unsigned int reg, unsigned int value) | |
256 | { | |
257 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
0944cc39 DP |
258 | struct snd_soc_rbtree_node *rbnode, *rbnode_tmp; |
259 | struct rb_node *node; | |
260 | unsigned int val; | |
261 | unsigned int reg_tmp; | |
7e146b55 | 262 | unsigned int base_reg, top_reg; |
0944cc39 DP |
263 | unsigned int pos; |
264 | int i; | |
265 | int ret; | |
a7f387d5 DP |
266 | |
267 | rbtree_ctx = codec->reg_cache; | |
7e146b55 DP |
268 | /* look up the required register in the cached rbnode */ |
269 | rbnode = rbtree_ctx->cached_rbnode; | |
270 | if (rbnode) { | |
271 | snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg); | |
272 | if (reg >= base_reg && reg <= top_reg) { | |
273 | reg_tmp = reg - base_reg; | |
274 | val = snd_soc_rbtree_get_register(rbnode, reg_tmp); | |
275 | if (val == value) | |
276 | return 0; | |
277 | snd_soc_rbtree_set_register(rbnode, reg_tmp, value); | |
278 | return 0; | |
279 | } | |
280 | } | |
281 | /* if we can't locate it in the cached rbnode we'll have | |
282 | * to traverse the rbtree looking for it. | |
283 | */ | |
a7f387d5 DP |
284 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); |
285 | if (rbnode) { | |
0944cc39 DP |
286 | reg_tmp = reg - rbnode->base_reg; |
287 | val = snd_soc_rbtree_get_register(rbnode, reg_tmp); | |
288 | if (val == value) | |
a7f387d5 | 289 | return 0; |
0944cc39 | 290 | snd_soc_rbtree_set_register(rbnode, reg_tmp, value); |
7e146b55 | 291 | rbtree_ctx->cached_rbnode = rbnode; |
a7f387d5 DP |
292 | } else { |
293 | /* bail out early, no need to create the rbnode yet */ | |
294 | if (!value) | |
295 | return 0; | |
0944cc39 DP |
296 | /* look for an adjacent register to the one we are about to add */ |
297 | for (node = rb_first(&rbtree_ctx->root); node; | |
298 | node = rb_next(node)) { | |
299 | rbnode_tmp = rb_entry(node, struct snd_soc_rbtree_node, node); | |
300 | for (i = 0; i < rbnode_tmp->blklen; ++i) { | |
301 | reg_tmp = rbnode_tmp->base_reg + i; | |
302 | if (abs(reg_tmp - reg) != 1) | |
303 | continue; | |
304 | /* decide where in the block to place our register */ | |
305 | if (reg_tmp + 1 == reg) | |
306 | pos = i + 1; | |
307 | else | |
308 | pos = i; | |
309 | ret = snd_soc_rbtree_insert_to_block(rbnode_tmp, pos, | |
310 | reg, value); | |
311 | if (ret) | |
312 | return ret; | |
7e146b55 | 313 | rbtree_ctx->cached_rbnode = rbnode_tmp; |
0944cc39 DP |
314 | return 0; |
315 | } | |
316 | } | |
317 | /* we did not manage to find a place to insert it in an existing | |
318 | * block so create a new rbnode with a single register in its block. | |
319 | * This block will get populated further if any other adjacent | |
320 | * registers get modified in the future. | |
a7f387d5 DP |
321 | */ |
322 | rbnode = kzalloc(sizeof *rbnode, GFP_KERNEL); | |
323 | if (!rbnode) | |
324 | return -ENOMEM; | |
0944cc39 DP |
325 | rbnode->blklen = 1; |
326 | rbnode->base_reg = reg; | |
327 | rbnode->word_size = codec->driver->reg_word_size; | |
328 | rbnode->block = kmalloc(rbnode->blklen * rbnode->word_size, | |
329 | GFP_KERNEL); | |
330 | if (!rbnode->block) { | |
331 | kfree(rbnode); | |
332 | return -ENOMEM; | |
333 | } | |
334 | snd_soc_rbtree_set_register(rbnode, 0, value); | |
a7f387d5 | 335 | snd_soc_rbtree_insert(&rbtree_ctx->root, rbnode); |
7e146b55 | 336 | rbtree_ctx->cached_rbnode = rbnode; |
a7f387d5 DP |
337 | } |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static int snd_soc_rbtree_cache_read(struct snd_soc_codec *codec, | |
343 | unsigned int reg, unsigned int *value) | |
344 | { | |
345 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
346 | struct snd_soc_rbtree_node *rbnode; | |
7e146b55 | 347 | unsigned int base_reg, top_reg; |
0944cc39 | 348 | unsigned int reg_tmp; |
a7f387d5 DP |
349 | |
350 | rbtree_ctx = codec->reg_cache; | |
7e146b55 DP |
351 | /* look up the required register in the cached rbnode */ |
352 | rbnode = rbtree_ctx->cached_rbnode; | |
353 | if (rbnode) { | |
354 | snd_soc_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg); | |
355 | if (reg >= base_reg && reg <= top_reg) { | |
356 | reg_tmp = reg - base_reg; | |
357 | *value = snd_soc_rbtree_get_register(rbnode, reg_tmp); | |
358 | return 0; | |
359 | } | |
360 | } | |
361 | /* if we can't locate it in the cached rbnode we'll have | |
362 | * to traverse the rbtree looking for it. | |
363 | */ | |
a7f387d5 DP |
364 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); |
365 | if (rbnode) { | |
0944cc39 DP |
366 | reg_tmp = reg - rbnode->base_reg; |
367 | *value = snd_soc_rbtree_get_register(rbnode, reg_tmp); | |
7e146b55 | 368 | rbtree_ctx->cached_rbnode = rbnode; |
a7f387d5 DP |
369 | } else { |
370 | /* uninitialized registers default to 0 */ | |
371 | *value = 0; | |
372 | } | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec) | |
378 | { | |
379 | struct rb_node *next; | |
380 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
381 | struct snd_soc_rbtree_node *rbtree_node; | |
382 | ||
383 | /* if we've already been called then just return */ | |
384 | rbtree_ctx = codec->reg_cache; | |
385 | if (!rbtree_ctx) | |
386 | return 0; | |
387 | ||
388 | /* free up the rbtree */ | |
389 | next = rb_first(&rbtree_ctx->root); | |
390 | while (next) { | |
391 | rbtree_node = rb_entry(next, struct snd_soc_rbtree_node, node); | |
392 | next = rb_next(&rbtree_node->node); | |
393 | rb_erase(&rbtree_node->node, &rbtree_ctx->root); | |
0944cc39 | 394 | kfree(rbtree_node->block); |
a7f387d5 DP |
395 | kfree(rbtree_node); |
396 | } | |
397 | ||
398 | /* release the resources */ | |
399 | kfree(codec->reg_cache); | |
400 | codec->reg_cache = NULL; | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec) | |
406 | { | |
407 | struct snd_soc_rbtree_ctx *rbtree_ctx; | |
1321e883 | 408 | unsigned int word_size; |
0944cc39 | 409 | unsigned int val; |
1321e883 DP |
410 | int i; |
411 | int ret; | |
a7f387d5 DP |
412 | |
413 | codec->reg_cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL); | |
414 | if (!codec->reg_cache) | |
415 | return -ENOMEM; | |
416 | ||
417 | rbtree_ctx = codec->reg_cache; | |
418 | rbtree_ctx->root = RB_ROOT; | |
7e146b55 | 419 | rbtree_ctx->cached_rbnode = NULL; |
a7f387d5 | 420 | |
3335ddca | 421 | if (!codec->reg_def_copy) |
a7f387d5 DP |
422 | return 0; |
423 | ||
1321e883 DP |
424 | word_size = codec->driver->reg_word_size; |
425 | for (i = 0; i < codec->driver->reg_cache_size; ++i) { | |
0944cc39 DP |
426 | val = snd_soc_get_cache_val(codec->reg_def_copy, i, |
427 | word_size); | |
1321e883 DP |
428 | if (!val) |
429 | continue; | |
0944cc39 DP |
430 | ret = snd_soc_rbtree_cache_write(codec, i, val); |
431 | if (ret) | |
432 | goto err; | |
a7f387d5 DP |
433 | } |
434 | ||
435 | return 0; | |
0944cc39 DP |
436 | |
437 | err: | |
438 | snd_soc_cache_exit(codec); | |
439 | return ret; | |
a7f387d5 DP |
440 | } |
441 | ||
68d44ee0 | 442 | #ifdef CONFIG_SND_SOC_CACHE_LZO |
cc28fb8e DP |
443 | struct snd_soc_lzo_ctx { |
444 | void *wmem; | |
445 | void *dst; | |
446 | const void *src; | |
447 | size_t src_len; | |
448 | size_t dst_len; | |
449 | size_t decompressed_size; | |
450 | unsigned long *sync_bmp; | |
451 | int sync_bmp_nbits; | |
452 | }; | |
453 | ||
454 | #define LZO_BLOCK_NUM 8 | |
455 | static int snd_soc_lzo_block_count(void) | |
456 | { | |
457 | return LZO_BLOCK_NUM; | |
458 | } | |
459 | ||
460 | static int snd_soc_lzo_prepare(struct snd_soc_lzo_ctx *lzo_ctx) | |
461 | { | |
462 | lzo_ctx->wmem = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); | |
463 | if (!lzo_ctx->wmem) | |
464 | return -ENOMEM; | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static int snd_soc_lzo_compress(struct snd_soc_lzo_ctx *lzo_ctx) | |
469 | { | |
470 | size_t compress_size; | |
471 | int ret; | |
472 | ||
473 | ret = lzo1x_1_compress(lzo_ctx->src, lzo_ctx->src_len, | |
474 | lzo_ctx->dst, &compress_size, lzo_ctx->wmem); | |
475 | if (ret != LZO_E_OK || compress_size > lzo_ctx->dst_len) | |
476 | return -EINVAL; | |
477 | lzo_ctx->dst_len = compress_size; | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int snd_soc_lzo_decompress(struct snd_soc_lzo_ctx *lzo_ctx) | |
482 | { | |
483 | size_t dst_len; | |
484 | int ret; | |
485 | ||
486 | dst_len = lzo_ctx->dst_len; | |
487 | ret = lzo1x_decompress_safe(lzo_ctx->src, lzo_ctx->src_len, | |
488 | lzo_ctx->dst, &dst_len); | |
489 | if (ret != LZO_E_OK || dst_len != lzo_ctx->dst_len) | |
490 | return -EINVAL; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | static int snd_soc_lzo_compress_cache_block(struct snd_soc_codec *codec, | |
495 | struct snd_soc_lzo_ctx *lzo_ctx) | |
496 | { | |
497 | int ret; | |
498 | ||
499 | lzo_ctx->dst_len = lzo1x_worst_compress(PAGE_SIZE); | |
500 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); | |
501 | if (!lzo_ctx->dst) { | |
502 | lzo_ctx->dst_len = 0; | |
503 | return -ENOMEM; | |
504 | } | |
505 | ||
506 | ret = snd_soc_lzo_compress(lzo_ctx); | |
507 | if (ret < 0) | |
508 | return ret; | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int snd_soc_lzo_decompress_cache_block(struct snd_soc_codec *codec, | |
513 | struct snd_soc_lzo_ctx *lzo_ctx) | |
514 | { | |
515 | int ret; | |
516 | ||
517 | lzo_ctx->dst_len = lzo_ctx->decompressed_size; | |
518 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); | |
519 | if (!lzo_ctx->dst) { | |
520 | lzo_ctx->dst_len = 0; | |
521 | return -ENOMEM; | |
522 | } | |
523 | ||
524 | ret = snd_soc_lzo_decompress(lzo_ctx); | |
525 | if (ret < 0) | |
526 | return ret; | |
527 | return 0; | |
528 | } | |
529 | ||
530 | static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec, | |
531 | unsigned int reg) | |
532 | { | |
001ae4c0 | 533 | const struct snd_soc_codec_driver *codec_drv; |
cc28fb8e DP |
534 | |
535 | codec_drv = codec->driver; | |
cc28fb8e | 536 | return (reg * codec_drv->reg_word_size) / |
aea170a0 | 537 | DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()); |
cc28fb8e DP |
538 | } |
539 | ||
540 | static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec, | |
541 | unsigned int reg) | |
542 | { | |
001ae4c0 | 543 | const struct snd_soc_codec_driver *codec_drv; |
cc28fb8e DP |
544 | |
545 | codec_drv = codec->driver; | |
aea170a0 | 546 | return reg % (DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()) / |
cc28fb8e DP |
547 | codec_drv->reg_word_size); |
548 | } | |
549 | ||
550 | static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec) | |
551 | { | |
aea170a0 | 552 | return DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()); |
cc28fb8e DP |
553 | } |
554 | ||
555 | static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec) | |
556 | { | |
557 | struct snd_soc_lzo_ctx **lzo_blocks; | |
558 | unsigned int val; | |
559 | int i; | |
7a33d4ce | 560 | int ret; |
cc28fb8e DP |
561 | |
562 | lzo_blocks = codec->reg_cache; | |
563 | for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { | |
6c5b756a | 564 | WARN_ON(!snd_soc_codec_writable_register(codec, i)); |
7a33d4ce DP |
565 | ret = snd_soc_cache_read(codec, i, &val); |
566 | if (ret) | |
567 | return ret; | |
9978007b | 568 | codec->cache_bypass = 1; |
7a33d4ce | 569 | ret = snd_soc_write(codec, i, val); |
9978007b | 570 | codec->cache_bypass = 0; |
7a33d4ce DP |
571 | if (ret) |
572 | return ret; | |
cc28fb8e DP |
573 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
574 | i, val); | |
575 | } | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int snd_soc_lzo_cache_write(struct snd_soc_codec *codec, | |
581 | unsigned int reg, unsigned int value) | |
582 | { | |
583 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; | |
584 | int ret, blkindex, blkpos; | |
585 | size_t blksize, tmp_dst_len; | |
586 | void *tmp_dst; | |
587 | ||
588 | /* index of the compressed lzo block */ | |
589 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); | |
590 | /* register index within the decompressed block */ | |
591 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); | |
592 | /* size of the compressed block */ | |
593 | blksize = snd_soc_lzo_get_blksize(codec); | |
594 | lzo_blocks = codec->reg_cache; | |
595 | lzo_block = lzo_blocks[blkindex]; | |
596 | ||
597 | /* save the pointer and length of the compressed block */ | |
598 | tmp_dst = lzo_block->dst; | |
599 | tmp_dst_len = lzo_block->dst_len; | |
600 | ||
601 | /* prepare the source to be the compressed block */ | |
602 | lzo_block->src = lzo_block->dst; | |
603 | lzo_block->src_len = lzo_block->dst_len; | |
604 | ||
605 | /* decompress the block */ | |
606 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); | |
607 | if (ret < 0) { | |
608 | kfree(lzo_block->dst); | |
609 | goto out; | |
610 | } | |
611 | ||
612 | /* write the new value to the cache */ | |
1321e883 DP |
613 | if (snd_soc_set_cache_val(lzo_block->dst, blkpos, value, |
614 | codec->driver->reg_word_size)) { | |
615 | kfree(lzo_block->dst); | |
616 | goto out; | |
cc28fb8e DP |
617 | } |
618 | ||
619 | /* prepare the source to be the decompressed block */ | |
620 | lzo_block->src = lzo_block->dst; | |
621 | lzo_block->src_len = lzo_block->dst_len; | |
622 | ||
623 | /* compress the block */ | |
624 | ret = snd_soc_lzo_compress_cache_block(codec, lzo_block); | |
625 | if (ret < 0) { | |
626 | kfree(lzo_block->dst); | |
627 | kfree(lzo_block->src); | |
628 | goto out; | |
629 | } | |
630 | ||
631 | /* set the bit so we know we have to sync this register */ | |
632 | set_bit(reg, lzo_block->sync_bmp); | |
633 | kfree(tmp_dst); | |
634 | kfree(lzo_block->src); | |
635 | return 0; | |
636 | out: | |
637 | lzo_block->dst = tmp_dst; | |
638 | lzo_block->dst_len = tmp_dst_len; | |
639 | return ret; | |
640 | } | |
641 | ||
642 | static int snd_soc_lzo_cache_read(struct snd_soc_codec *codec, | |
643 | unsigned int reg, unsigned int *value) | |
644 | { | |
645 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; | |
646 | int ret, blkindex, blkpos; | |
647 | size_t blksize, tmp_dst_len; | |
648 | void *tmp_dst; | |
649 | ||
650 | *value = 0; | |
651 | /* index of the compressed lzo block */ | |
652 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); | |
653 | /* register index within the decompressed block */ | |
654 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); | |
655 | /* size of the compressed block */ | |
656 | blksize = snd_soc_lzo_get_blksize(codec); | |
657 | lzo_blocks = codec->reg_cache; | |
658 | lzo_block = lzo_blocks[blkindex]; | |
659 | ||
660 | /* save the pointer and length of the compressed block */ | |
661 | tmp_dst = lzo_block->dst; | |
662 | tmp_dst_len = lzo_block->dst_len; | |
663 | ||
664 | /* prepare the source to be the compressed block */ | |
665 | lzo_block->src = lzo_block->dst; | |
666 | lzo_block->src_len = lzo_block->dst_len; | |
667 | ||
668 | /* decompress the block */ | |
669 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); | |
1321e883 | 670 | if (ret >= 0) |
cc28fb8e | 671 | /* fetch the value from the cache */ |
1321e883 DP |
672 | *value = snd_soc_get_cache_val(lzo_block->dst, blkpos, |
673 | codec->driver->reg_word_size); | |
cc28fb8e DP |
674 | |
675 | kfree(lzo_block->dst); | |
676 | /* restore the pointer and length of the compressed block */ | |
677 | lzo_block->dst = tmp_dst; | |
678 | lzo_block->dst_len = tmp_dst_len; | |
679 | return 0; | |
680 | } | |
681 | ||
682 | static int snd_soc_lzo_cache_exit(struct snd_soc_codec *codec) | |
683 | { | |
684 | struct snd_soc_lzo_ctx **lzo_blocks; | |
685 | int i, blkcount; | |
686 | ||
687 | lzo_blocks = codec->reg_cache; | |
688 | if (!lzo_blocks) | |
689 | return 0; | |
690 | ||
691 | blkcount = snd_soc_lzo_block_count(); | |
692 | /* | |
693 | * the pointer to the bitmap used for syncing the cache | |
694 | * is shared amongst all lzo_blocks. Ensure it is freed | |
695 | * only once. | |
696 | */ | |
697 | if (lzo_blocks[0]) | |
698 | kfree(lzo_blocks[0]->sync_bmp); | |
699 | for (i = 0; i < blkcount; ++i) { | |
700 | if (lzo_blocks[i]) { | |
701 | kfree(lzo_blocks[i]->wmem); | |
702 | kfree(lzo_blocks[i]->dst); | |
703 | } | |
704 | /* each lzo_block is a pointer returned by kmalloc or NULL */ | |
705 | kfree(lzo_blocks[i]); | |
706 | } | |
707 | kfree(lzo_blocks); | |
708 | codec->reg_cache = NULL; | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec) | |
713 | { | |
714 | struct snd_soc_lzo_ctx **lzo_blocks; | |
aea170a0 | 715 | size_t bmp_size; |
001ae4c0 | 716 | const struct snd_soc_codec_driver *codec_drv; |
cc28fb8e DP |
717 | int ret, tofree, i, blksize, blkcount; |
718 | const char *p, *end; | |
719 | unsigned long *sync_bmp; | |
720 | ||
721 | ret = 0; | |
722 | codec_drv = codec->driver; | |
cc28fb8e DP |
723 | |
724 | /* | |
725 | * If we have not been given a default register cache | |
726 | * then allocate a dummy zero-ed out region, compress it | |
727 | * and remember to free it afterwards. | |
728 | */ | |
729 | tofree = 0; | |
3335ddca | 730 | if (!codec->reg_def_copy) |
cc28fb8e DP |
731 | tofree = 1; |
732 | ||
3335ddca | 733 | if (!codec->reg_def_copy) { |
aea170a0 | 734 | codec->reg_def_copy = kzalloc(codec->reg_size, GFP_KERNEL); |
3335ddca | 735 | if (!codec->reg_def_copy) |
cc28fb8e DP |
736 | return -ENOMEM; |
737 | } | |
738 | ||
739 | blkcount = snd_soc_lzo_block_count(); | |
740 | codec->reg_cache = kzalloc(blkcount * sizeof *lzo_blocks, | |
741 | GFP_KERNEL); | |
742 | if (!codec->reg_cache) { | |
743 | ret = -ENOMEM; | |
744 | goto err_tofree; | |
745 | } | |
746 | lzo_blocks = codec->reg_cache; | |
747 | ||
748 | /* | |
749 | * allocate a bitmap to be used when syncing the cache with | |
750 | * the hardware. Each time a register is modified, the corresponding | |
751 | * bit is set in the bitmap, so we know that we have to sync | |
752 | * that register. | |
753 | */ | |
754 | bmp_size = codec_drv->reg_cache_size; | |
465d7fcc | 755 | sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof(long), |
cc28fb8e DP |
756 | GFP_KERNEL); |
757 | if (!sync_bmp) { | |
758 | ret = -ENOMEM; | |
759 | goto err; | |
760 | } | |
09c74a9d | 761 | bitmap_zero(sync_bmp, bmp_size); |
cc28fb8e DP |
762 | |
763 | /* allocate the lzo blocks and initialize them */ | |
764 | for (i = 0; i < blkcount; ++i) { | |
765 | lzo_blocks[i] = kzalloc(sizeof **lzo_blocks, | |
766 | GFP_KERNEL); | |
767 | if (!lzo_blocks[i]) { | |
768 | kfree(sync_bmp); | |
769 | ret = -ENOMEM; | |
770 | goto err; | |
771 | } | |
772 | lzo_blocks[i]->sync_bmp = sync_bmp; | |
04f8fd17 | 773 | lzo_blocks[i]->sync_bmp_nbits = bmp_size; |
cc28fb8e DP |
774 | /* alloc the working space for the compressed block */ |
775 | ret = snd_soc_lzo_prepare(lzo_blocks[i]); | |
776 | if (ret < 0) | |
777 | goto err; | |
778 | } | |
779 | ||
780 | blksize = snd_soc_lzo_get_blksize(codec); | |
3335ddca | 781 | p = codec->reg_def_copy; |
aea170a0 | 782 | end = codec->reg_def_copy + codec->reg_size; |
cc28fb8e DP |
783 | /* compress the register map and fill the lzo blocks */ |
784 | for (i = 0; i < blkcount; ++i, p += blksize) { | |
785 | lzo_blocks[i]->src = p; | |
786 | if (p + blksize > end) | |
787 | lzo_blocks[i]->src_len = end - p; | |
788 | else | |
789 | lzo_blocks[i]->src_len = blksize; | |
790 | ret = snd_soc_lzo_compress_cache_block(codec, | |
791 | lzo_blocks[i]); | |
792 | if (ret < 0) | |
793 | goto err; | |
794 | lzo_blocks[i]->decompressed_size = | |
795 | lzo_blocks[i]->src_len; | |
796 | } | |
797 | ||
3335ddca DP |
798 | if (tofree) { |
799 | kfree(codec->reg_def_copy); | |
800 | codec->reg_def_copy = NULL; | |
801 | } | |
cc28fb8e DP |
802 | return 0; |
803 | err: | |
804 | snd_soc_cache_exit(codec); | |
805 | err_tofree: | |
3335ddca DP |
806 | if (tofree) { |
807 | kfree(codec->reg_def_copy); | |
808 | codec->reg_def_copy = NULL; | |
809 | } | |
cc28fb8e DP |
810 | return ret; |
811 | } | |
68d44ee0 | 812 | #endif |
cc28fb8e | 813 | |
7a30a3db DP |
814 | static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec) |
815 | { | |
816 | int i; | |
7a33d4ce | 817 | int ret; |
001ae4c0 | 818 | const struct snd_soc_codec_driver *codec_drv; |
7a30a3db DP |
819 | unsigned int val; |
820 | ||
821 | codec_drv = codec->driver; | |
822 | for (i = 0; i < codec_drv->reg_cache_size; ++i) { | |
7a33d4ce DP |
823 | ret = snd_soc_cache_read(codec, i, &val); |
824 | if (ret) | |
825 | return ret; | |
d779fce5 DP |
826 | if (codec->reg_def_copy) |
827 | if (snd_soc_get_cache_val(codec->reg_def_copy, | |
1321e883 DP |
828 | i, codec_drv->reg_word_size) == val) |
829 | continue; | |
6c5b756a LPC |
830 | |
831 | WARN_ON(!snd_soc_codec_writable_register(codec, i)); | |
832 | ||
7a33d4ce DP |
833 | ret = snd_soc_write(codec, i, val); |
834 | if (ret) | |
835 | return ret; | |
7a30a3db DP |
836 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
837 | i, val); | |
838 | } | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static int snd_soc_flat_cache_write(struct snd_soc_codec *codec, | |
843 | unsigned int reg, unsigned int value) | |
844 | { | |
1321e883 DP |
845 | snd_soc_set_cache_val(codec->reg_cache, reg, value, |
846 | codec->driver->reg_word_size); | |
7a30a3db DP |
847 | return 0; |
848 | } | |
849 | ||
850 | static int snd_soc_flat_cache_read(struct snd_soc_codec *codec, | |
851 | unsigned int reg, unsigned int *value) | |
852 | { | |
1321e883 DP |
853 | *value = snd_soc_get_cache_val(codec->reg_cache, reg, |
854 | codec->driver->reg_word_size); | |
7a30a3db DP |
855 | return 0; |
856 | } | |
857 | ||
858 | static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec) | |
859 | { | |
860 | if (!codec->reg_cache) | |
861 | return 0; | |
862 | kfree(codec->reg_cache); | |
863 | codec->reg_cache = NULL; | |
864 | return 0; | |
865 | } | |
866 | ||
867 | static int snd_soc_flat_cache_init(struct snd_soc_codec *codec) | |
868 | { | |
d779fce5 DP |
869 | if (codec->reg_def_copy) |
870 | codec->reg_cache = kmemdup(codec->reg_def_copy, | |
aea170a0 | 871 | codec->reg_size, GFP_KERNEL); |
7a30a3db | 872 | else |
aea170a0 | 873 | codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL); |
7a30a3db DP |
874 | if (!codec->reg_cache) |
875 | return -ENOMEM; | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
880 | /* an array of all supported compression types */ | |
881 | static const struct snd_soc_cache_ops cache_types[] = { | |
be4fcddd | 882 | /* Flat *must* be the first entry for fallback */ |
7a30a3db | 883 | { |
df0701bb | 884 | .id = SND_SOC_FLAT_COMPRESSION, |
0d735eaa | 885 | .name = "flat", |
7a30a3db DP |
886 | .init = snd_soc_flat_cache_init, |
887 | .exit = snd_soc_flat_cache_exit, | |
888 | .read = snd_soc_flat_cache_read, | |
889 | .write = snd_soc_flat_cache_write, | |
890 | .sync = snd_soc_flat_cache_sync | |
cc28fb8e | 891 | }, |
68d44ee0 | 892 | #ifdef CONFIG_SND_SOC_CACHE_LZO |
cc28fb8e DP |
893 | { |
894 | .id = SND_SOC_LZO_COMPRESSION, | |
0d735eaa | 895 | .name = "LZO", |
cc28fb8e DP |
896 | .init = snd_soc_lzo_cache_init, |
897 | .exit = snd_soc_lzo_cache_exit, | |
898 | .read = snd_soc_lzo_cache_read, | |
899 | .write = snd_soc_lzo_cache_write, | |
900 | .sync = snd_soc_lzo_cache_sync | |
a7f387d5 | 901 | }, |
68d44ee0 | 902 | #endif |
a7f387d5 DP |
903 | { |
904 | .id = SND_SOC_RBTREE_COMPRESSION, | |
0d735eaa | 905 | .name = "rbtree", |
a7f387d5 DP |
906 | .init = snd_soc_rbtree_cache_init, |
907 | .exit = snd_soc_rbtree_cache_exit, | |
908 | .read = snd_soc_rbtree_cache_read, | |
909 | .write = snd_soc_rbtree_cache_write, | |
910 | .sync = snd_soc_rbtree_cache_sync | |
7a30a3db DP |
911 | } |
912 | }; | |
913 | ||
914 | int snd_soc_cache_init(struct snd_soc_codec *codec) | |
915 | { | |
916 | int i; | |
917 | ||
918 | for (i = 0; i < ARRAY_SIZE(cache_types); ++i) | |
23bbce34 | 919 | if (cache_types[i].id == codec->compress_type) |
7a30a3db | 920 | break; |
be4fcddd MB |
921 | |
922 | /* Fall back to flat compression */ | |
7a30a3db | 923 | if (i == ARRAY_SIZE(cache_types)) { |
be4fcddd MB |
924 | dev_warn(codec->dev, "Could not match compress type: %d\n", |
925 | codec->compress_type); | |
926 | i = 0; | |
7a30a3db DP |
927 | } |
928 | ||
929 | mutex_init(&codec->cache_rw_mutex); | |
930 | codec->cache_ops = &cache_types[i]; | |
931 | ||
0d735eaa DP |
932 | if (codec->cache_ops->init) { |
933 | if (codec->cache_ops->name) | |
934 | dev_dbg(codec->dev, "Initializing %s cache for %s codec\n", | |
935 | codec->cache_ops->name, codec->name); | |
7a30a3db | 936 | return codec->cache_ops->init(codec); |
0d735eaa | 937 | } |
acd61451 | 938 | return -ENOSYS; |
7a30a3db DP |
939 | } |
940 | ||
941 | /* | |
942 | * NOTE: keep in mind that this function might be called | |
943 | * multiple times. | |
944 | */ | |
945 | int snd_soc_cache_exit(struct snd_soc_codec *codec) | |
946 | { | |
0d735eaa DP |
947 | if (codec->cache_ops && codec->cache_ops->exit) { |
948 | if (codec->cache_ops->name) | |
949 | dev_dbg(codec->dev, "Destroying %s cache for %s codec\n", | |
950 | codec->cache_ops->name, codec->name); | |
7a30a3db | 951 | return codec->cache_ops->exit(codec); |
0d735eaa | 952 | } |
acd61451 | 953 | return -ENOSYS; |
7a30a3db DP |
954 | } |
955 | ||
956 | /** | |
957 | * snd_soc_cache_read: Fetch the value of a given register from the cache. | |
958 | * | |
959 | * @codec: CODEC to configure. | |
960 | * @reg: The register index. | |
961 | * @value: The value to be returned. | |
962 | */ | |
963 | int snd_soc_cache_read(struct snd_soc_codec *codec, | |
964 | unsigned int reg, unsigned int *value) | |
965 | { | |
966 | int ret; | |
967 | ||
968 | mutex_lock(&codec->cache_rw_mutex); | |
969 | ||
970 | if (value && codec->cache_ops && codec->cache_ops->read) { | |
971 | ret = codec->cache_ops->read(codec, reg, value); | |
972 | mutex_unlock(&codec->cache_rw_mutex); | |
973 | return ret; | |
974 | } | |
975 | ||
976 | mutex_unlock(&codec->cache_rw_mutex); | |
acd61451 | 977 | return -ENOSYS; |
7a30a3db DP |
978 | } |
979 | EXPORT_SYMBOL_GPL(snd_soc_cache_read); | |
980 | ||
981 | /** | |
982 | * snd_soc_cache_write: Set the value of a given register in the cache. | |
983 | * | |
984 | * @codec: CODEC to configure. | |
985 | * @reg: The register index. | |
986 | * @value: The new register value. | |
987 | */ | |
988 | int snd_soc_cache_write(struct snd_soc_codec *codec, | |
989 | unsigned int reg, unsigned int value) | |
990 | { | |
991 | int ret; | |
992 | ||
993 | mutex_lock(&codec->cache_rw_mutex); | |
994 | ||
995 | if (codec->cache_ops && codec->cache_ops->write) { | |
996 | ret = codec->cache_ops->write(codec, reg, value); | |
997 | mutex_unlock(&codec->cache_rw_mutex); | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | mutex_unlock(&codec->cache_rw_mutex); | |
acd61451 | 1002 | return -ENOSYS; |
7a30a3db DP |
1003 | } |
1004 | EXPORT_SYMBOL_GPL(snd_soc_cache_write); | |
1005 | ||
1006 | /** | |
1007 | * snd_soc_cache_sync: Sync the register cache with the hardware. | |
1008 | * | |
1009 | * @codec: CODEC to configure. | |
1010 | * | |
1011 | * Any registers that should not be synced should be marked as | |
1012 | * volatile. In general drivers can choose not to use the provided | |
1013 | * syncing functionality if they so require. | |
1014 | */ | |
1015 | int snd_soc_cache_sync(struct snd_soc_codec *codec) | |
1016 | { | |
1017 | int ret; | |
c358e640 | 1018 | const char *name; |
7a30a3db DP |
1019 | |
1020 | if (!codec->cache_sync) { | |
1021 | return 0; | |
1022 | } | |
1023 | ||
46fdaa3b | 1024 | if (!codec->cache_ops || !codec->cache_ops->sync) |
acd61451 | 1025 | return -ENOSYS; |
46fdaa3b | 1026 | |
c358e640 DP |
1027 | if (codec->cache_ops->name) |
1028 | name = codec->cache_ops->name; | |
1029 | else | |
1030 | name = "unknown"; | |
1031 | ||
46fdaa3b DC |
1032 | if (codec->cache_ops->name) |
1033 | dev_dbg(codec->dev, "Syncing %s cache for %s codec\n", | |
1034 | codec->cache_ops->name, codec->name); | |
1035 | trace_snd_soc_cache_sync(codec, name, "start"); | |
1036 | ret = codec->cache_ops->sync(codec); | |
1037 | if (!ret) | |
1038 | codec->cache_sync = 0; | |
1039 | trace_snd_soc_cache_sync(codec, name, "end"); | |
1040 | return ret; | |
7a30a3db DP |
1041 | } |
1042 | EXPORT_SYMBOL_GPL(snd_soc_cache_sync); | |
066d16c3 DP |
1043 | |
1044 | static int snd_soc_get_reg_access_index(struct snd_soc_codec *codec, | |
1045 | unsigned int reg) | |
1046 | { | |
1047 | const struct snd_soc_codec_driver *codec_drv; | |
1048 | unsigned int min, max, index; | |
1049 | ||
1050 | codec_drv = codec->driver; | |
1051 | min = 0; | |
1052 | max = codec_drv->reg_access_size - 1; | |
1053 | do { | |
1054 | index = (min + max) / 2; | |
1055 | if (codec_drv->reg_access_default[index].reg == reg) | |
1056 | return index; | |
1057 | if (codec_drv->reg_access_default[index].reg < reg) | |
1058 | min = index + 1; | |
1059 | else | |
1060 | max = index; | |
1061 | } while (min <= max); | |
1062 | return -1; | |
1063 | } | |
1064 | ||
1065 | int snd_soc_default_volatile_register(struct snd_soc_codec *codec, | |
1066 | unsigned int reg) | |
1067 | { | |
1068 | int index; | |
1069 | ||
1070 | if (reg >= codec->driver->reg_cache_size) | |
1071 | return 1; | |
1072 | index = snd_soc_get_reg_access_index(codec, reg); | |
1073 | if (index < 0) | |
1074 | return 0; | |
1075 | return codec->driver->reg_access_default[index].vol; | |
1076 | } | |
1077 | EXPORT_SYMBOL_GPL(snd_soc_default_volatile_register); | |
1078 | ||
1079 | int snd_soc_default_readable_register(struct snd_soc_codec *codec, | |
1080 | unsigned int reg) | |
1081 | { | |
1082 | int index; | |
1083 | ||
1084 | if (reg >= codec->driver->reg_cache_size) | |
1085 | return 1; | |
1086 | index = snd_soc_get_reg_access_index(codec, reg); | |
1087 | if (index < 0) | |
1088 | return 0; | |
1089 | return codec->driver->reg_access_default[index].read; | |
1090 | } | |
1091 | EXPORT_SYMBOL_GPL(snd_soc_default_readable_register); | |
8020454c DP |
1092 | |
1093 | int snd_soc_default_writable_register(struct snd_soc_codec *codec, | |
1094 | unsigned int reg) | |
1095 | { | |
1096 | int index; | |
1097 | ||
1098 | if (reg >= codec->driver->reg_cache_size) | |
1099 | return 1; | |
1100 | index = snd_soc_get_reg_access_index(codec, reg); | |
1101 | if (index < 0) | |
1102 | return 0; | |
1103 | return codec->driver->reg_access_default[index].write; | |
1104 | } | |
1105 | EXPORT_SYMBOL_GPL(snd_soc_default_writable_register); |