Commit | Line | Data |
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b83a313b MB |
1 | /* |
2 | * Register map access API | |
3 | * | |
4 | * Copyright 2011 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 | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
f5d6eba7 | 13 | #include <linux/device.h> |
b83a313b | 14 | #include <linux/slab.h> |
19694b5e | 15 | #include <linux/export.h> |
b83a313b MB |
16 | #include <linux/mutex.h> |
17 | #include <linux/err.h> | |
6863ca62 | 18 | #include <linux/rbtree.h> |
b83a313b | 19 | |
fb2736bb MB |
20 | #define CREATE_TRACE_POINTS |
21 | #include <trace/events/regmap.h> | |
22 | ||
93de9124 | 23 | #include "internal.h" |
b83a313b | 24 | |
1044c180 MB |
25 | /* |
26 | * Sometimes for failures during very early init the trace | |
27 | * infrastructure isn't available early enough to be used. For this | |
28 | * sort of problem defining LOG_DEVICE will add printks for basic | |
29 | * register I/O on a specific device. | |
30 | */ | |
31 | #undef LOG_DEVICE | |
32 | ||
33 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
34 | unsigned int mask, unsigned int val, | |
35 | bool *change); | |
36 | ||
ad278406 AS |
37 | static int _regmap_bus_read(void *context, unsigned int reg, |
38 | unsigned int *val); | |
39 | ||
76aad392 DC |
40 | bool regmap_reg_in_ranges(unsigned int reg, |
41 | const struct regmap_range *ranges, | |
42 | unsigned int nranges) | |
43 | { | |
44 | const struct regmap_range *r; | |
45 | int i; | |
46 | ||
47 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
48 | if (regmap_reg_in_range(reg, r)) | |
49 | return true; | |
50 | return false; | |
51 | } | |
52 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
53 | ||
54 | static bool _regmap_check_range_table(struct regmap *map, | |
55 | unsigned int reg, | |
56 | const struct regmap_access_table *table) | |
57 | { | |
58 | /* Check "no ranges" first */ | |
59 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
60 | return false; | |
61 | ||
62 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
63 | if (!table->n_yes_ranges) | |
64 | return true; | |
65 | ||
66 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
67 | table->n_yes_ranges); | |
68 | } | |
69 | ||
8de2f081 MB |
70 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
71 | { | |
72 | if (map->max_register && reg > map->max_register) | |
73 | return false; | |
74 | ||
75 | if (map->writeable_reg) | |
76 | return map->writeable_reg(map->dev, reg); | |
77 | ||
76aad392 DC |
78 | if (map->wr_table) |
79 | return _regmap_check_range_table(map, reg, map->wr_table); | |
80 | ||
8de2f081 MB |
81 | return true; |
82 | } | |
83 | ||
84 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
85 | { | |
86 | if (map->max_register && reg > map->max_register) | |
87 | return false; | |
88 | ||
4191f197 WS |
89 | if (map->format.format_write) |
90 | return false; | |
91 | ||
8de2f081 MB |
92 | if (map->readable_reg) |
93 | return map->readable_reg(map->dev, reg); | |
94 | ||
76aad392 DC |
95 | if (map->rd_table) |
96 | return _regmap_check_range_table(map, reg, map->rd_table); | |
97 | ||
8de2f081 MB |
98 | return true; |
99 | } | |
100 | ||
101 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
102 | { | |
4191f197 | 103 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
104 | return false; |
105 | ||
106 | if (map->volatile_reg) | |
107 | return map->volatile_reg(map->dev, reg); | |
108 | ||
76aad392 DC |
109 | if (map->volatile_table) |
110 | return _regmap_check_range_table(map, reg, map->volatile_table); | |
111 | ||
8de2f081 MB |
112 | return true; |
113 | } | |
114 | ||
115 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
116 | { | |
4191f197 | 117 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
118 | return false; |
119 | ||
120 | if (map->precious_reg) | |
121 | return map->precious_reg(map->dev, reg); | |
122 | ||
76aad392 DC |
123 | if (map->precious_table) |
124 | return _regmap_check_range_table(map, reg, map->precious_table); | |
125 | ||
8de2f081 MB |
126 | return false; |
127 | } | |
128 | ||
82cd9965 | 129 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 130 | size_t num) |
82cd9965 LPC |
131 | { |
132 | unsigned int i; | |
133 | ||
134 | for (i = 0; i < num; i++) | |
135 | if (!regmap_volatile(map, reg + i)) | |
136 | return false; | |
137 | ||
138 | return true; | |
139 | } | |
140 | ||
9aa50750 WS |
141 | static void regmap_format_2_6_write(struct regmap *map, |
142 | unsigned int reg, unsigned int val) | |
143 | { | |
144 | u8 *out = map->work_buf; | |
145 | ||
146 | *out = (reg << 6) | val; | |
147 | } | |
148 | ||
b83a313b MB |
149 | static void regmap_format_4_12_write(struct regmap *map, |
150 | unsigned int reg, unsigned int val) | |
151 | { | |
152 | __be16 *out = map->work_buf; | |
153 | *out = cpu_to_be16((reg << 12) | val); | |
154 | } | |
155 | ||
156 | static void regmap_format_7_9_write(struct regmap *map, | |
157 | unsigned int reg, unsigned int val) | |
158 | { | |
159 | __be16 *out = map->work_buf; | |
160 | *out = cpu_to_be16((reg << 9) | val); | |
161 | } | |
162 | ||
7e5ec63e LPC |
163 | static void regmap_format_10_14_write(struct regmap *map, |
164 | unsigned int reg, unsigned int val) | |
165 | { | |
166 | u8 *out = map->work_buf; | |
167 | ||
168 | out[2] = val; | |
169 | out[1] = (val >> 8) | (reg << 6); | |
170 | out[0] = reg >> 2; | |
171 | } | |
172 | ||
d939fb9a | 173 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
174 | { |
175 | u8 *b = buf; | |
176 | ||
d939fb9a | 177 | b[0] = val << shift; |
b83a313b MB |
178 | } |
179 | ||
141eba2e | 180 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
181 | { |
182 | __be16 *b = buf; | |
183 | ||
d939fb9a | 184 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
185 | } |
186 | ||
141eba2e SW |
187 | static void regmap_format_16_native(void *buf, unsigned int val, |
188 | unsigned int shift) | |
189 | { | |
190 | *(u16 *)buf = val << shift; | |
191 | } | |
192 | ||
d939fb9a | 193 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
194 | { |
195 | u8 *b = buf; | |
196 | ||
d939fb9a MR |
197 | val <<= shift; |
198 | ||
ea279fc5 MR |
199 | b[0] = val >> 16; |
200 | b[1] = val >> 8; | |
201 | b[2] = val; | |
202 | } | |
203 | ||
141eba2e | 204 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
205 | { |
206 | __be32 *b = buf; | |
207 | ||
d939fb9a | 208 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
209 | } |
210 | ||
141eba2e SW |
211 | static void regmap_format_32_native(void *buf, unsigned int val, |
212 | unsigned int shift) | |
213 | { | |
214 | *(u32 *)buf = val << shift; | |
215 | } | |
216 | ||
b83a313b MB |
217 | static unsigned int regmap_parse_8(void *buf) |
218 | { | |
219 | u8 *b = buf; | |
220 | ||
221 | return b[0]; | |
222 | } | |
223 | ||
141eba2e | 224 | static unsigned int regmap_parse_16_be(void *buf) |
b83a313b MB |
225 | { |
226 | __be16 *b = buf; | |
227 | ||
228 | b[0] = be16_to_cpu(b[0]); | |
229 | ||
230 | return b[0]; | |
231 | } | |
232 | ||
141eba2e SW |
233 | static unsigned int regmap_parse_16_native(void *buf) |
234 | { | |
235 | return *(u16 *)buf; | |
236 | } | |
237 | ||
ea279fc5 MR |
238 | static unsigned int regmap_parse_24(void *buf) |
239 | { | |
240 | u8 *b = buf; | |
241 | unsigned int ret = b[2]; | |
242 | ret |= ((unsigned int)b[1]) << 8; | |
243 | ret |= ((unsigned int)b[0]) << 16; | |
244 | ||
245 | return ret; | |
246 | } | |
247 | ||
141eba2e | 248 | static unsigned int regmap_parse_32_be(void *buf) |
7d5e525b MB |
249 | { |
250 | __be32 *b = buf; | |
251 | ||
252 | b[0] = be32_to_cpu(b[0]); | |
253 | ||
254 | return b[0]; | |
255 | } | |
256 | ||
141eba2e SW |
257 | static unsigned int regmap_parse_32_native(void *buf) |
258 | { | |
259 | return *(u32 *)buf; | |
260 | } | |
261 | ||
0d4529c5 | 262 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 263 | { |
0d4529c5 | 264 | struct regmap *map = __map; |
bacdbe07 SW |
265 | mutex_lock(&map->mutex); |
266 | } | |
267 | ||
0d4529c5 | 268 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 269 | { |
0d4529c5 | 270 | struct regmap *map = __map; |
bacdbe07 SW |
271 | mutex_unlock(&map->mutex); |
272 | } | |
273 | ||
0d4529c5 | 274 | static void regmap_lock_spinlock(void *__map) |
bacdbe07 | 275 | { |
0d4529c5 | 276 | struct regmap *map = __map; |
bacdbe07 SW |
277 | spin_lock(&map->spinlock); |
278 | } | |
279 | ||
0d4529c5 | 280 | static void regmap_unlock_spinlock(void *__map) |
bacdbe07 | 281 | { |
0d4529c5 | 282 | struct regmap *map = __map; |
bacdbe07 SW |
283 | spin_unlock(&map->spinlock); |
284 | } | |
285 | ||
72b39f6f MB |
286 | static void dev_get_regmap_release(struct device *dev, void *res) |
287 | { | |
288 | /* | |
289 | * We don't actually have anything to do here; the goal here | |
290 | * is not to manage the regmap but to provide a simple way to | |
291 | * get the regmap back given a struct device. | |
292 | */ | |
293 | } | |
294 | ||
6863ca62 KG |
295 | static bool _regmap_range_add(struct regmap *map, |
296 | struct regmap_range_node *data) | |
297 | { | |
298 | struct rb_root *root = &map->range_tree; | |
299 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
300 | ||
301 | while (*new) { | |
302 | struct regmap_range_node *this = | |
303 | container_of(*new, struct regmap_range_node, node); | |
304 | ||
305 | parent = *new; | |
306 | if (data->range_max < this->range_min) | |
307 | new = &((*new)->rb_left); | |
308 | else if (data->range_min > this->range_max) | |
309 | new = &((*new)->rb_right); | |
310 | else | |
311 | return false; | |
312 | } | |
313 | ||
314 | rb_link_node(&data->node, parent, new); | |
315 | rb_insert_color(&data->node, root); | |
316 | ||
317 | return true; | |
318 | } | |
319 | ||
320 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
321 | unsigned int reg) | |
322 | { | |
323 | struct rb_node *node = map->range_tree.rb_node; | |
324 | ||
325 | while (node) { | |
326 | struct regmap_range_node *this = | |
327 | container_of(node, struct regmap_range_node, node); | |
328 | ||
329 | if (reg < this->range_min) | |
330 | node = node->rb_left; | |
331 | else if (reg > this->range_max) | |
332 | node = node->rb_right; | |
333 | else | |
334 | return this; | |
335 | } | |
336 | ||
337 | return NULL; | |
338 | } | |
339 | ||
340 | static void regmap_range_exit(struct regmap *map) | |
341 | { | |
342 | struct rb_node *next; | |
343 | struct regmap_range_node *range_node; | |
344 | ||
345 | next = rb_first(&map->range_tree); | |
346 | while (next) { | |
347 | range_node = rb_entry(next, struct regmap_range_node, node); | |
348 | next = rb_next(&range_node->node); | |
349 | rb_erase(&range_node->node, &map->range_tree); | |
350 | kfree(range_node); | |
351 | } | |
352 | ||
353 | kfree(map->selector_work_buf); | |
354 | } | |
355 | ||
b83a313b MB |
356 | /** |
357 | * regmap_init(): Initialise register map | |
358 | * | |
359 | * @dev: Device that will be interacted with | |
360 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 361 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
362 | * @config: Configuration for register map |
363 | * | |
364 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
365 | * a struct regmap. This function should generally not be called | |
366 | * directly, it should be called by bus-specific init functions. | |
367 | */ | |
368 | struct regmap *regmap_init(struct device *dev, | |
369 | const struct regmap_bus *bus, | |
0135bbcc | 370 | void *bus_context, |
b83a313b MB |
371 | const struct regmap_config *config) |
372 | { | |
72b39f6f | 373 | struct regmap *map, **m; |
b83a313b | 374 | int ret = -EINVAL; |
141eba2e | 375 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 376 | int i, j; |
b83a313b MB |
377 | |
378 | if (!bus || !config) | |
abbb18fb | 379 | goto err; |
b83a313b MB |
380 | |
381 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
382 | if (map == NULL) { | |
383 | ret = -ENOMEM; | |
384 | goto err; | |
385 | } | |
386 | ||
0d4529c5 DC |
387 | if (config->lock && config->unlock) { |
388 | map->lock = config->lock; | |
389 | map->unlock = config->unlock; | |
390 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 391 | } else { |
0d4529c5 DC |
392 | if (bus->fast_io) { |
393 | spin_lock_init(&map->spinlock); | |
394 | map->lock = regmap_lock_spinlock; | |
395 | map->unlock = regmap_unlock_spinlock; | |
396 | } else { | |
397 | mutex_init(&map->mutex); | |
398 | map->lock = regmap_lock_mutex; | |
399 | map->unlock = regmap_unlock_mutex; | |
400 | } | |
401 | map->lock_arg = map; | |
bacdbe07 | 402 | } |
c212accc | 403 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 404 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 405 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
406 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
407 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 408 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
409 | if (config->reg_stride) |
410 | map->reg_stride = config->reg_stride; | |
411 | else | |
412 | map->reg_stride = 1; | |
2e33caf1 | 413 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
414 | map->dev = dev; |
415 | map->bus = bus; | |
0135bbcc | 416 | map->bus_context = bus_context; |
2e2ae66d | 417 | map->max_register = config->max_register; |
76aad392 DC |
418 | map->wr_table = config->wr_table; |
419 | map->rd_table = config->rd_table; | |
420 | map->volatile_table = config->volatile_table; | |
421 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
422 | map->writeable_reg = config->writeable_reg; |
423 | map->readable_reg = config->readable_reg; | |
424 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 425 | map->precious_reg = config->precious_reg; |
5d1729e7 | 426 | map->cache_type = config->cache_type; |
72b39f6f | 427 | map->name = config->name; |
b83a313b | 428 | |
6f306441 LPC |
429 | if (config->read_flag_mask || config->write_flag_mask) { |
430 | map->read_flag_mask = config->read_flag_mask; | |
431 | map->write_flag_mask = config->write_flag_mask; | |
432 | } else { | |
433 | map->read_flag_mask = bus->read_flag_mask; | |
434 | } | |
435 | ||
ad278406 AS |
436 | map->reg_read = _regmap_bus_read; |
437 | ||
141eba2e SW |
438 | reg_endian = config->reg_format_endian; |
439 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
440 | reg_endian = bus->reg_format_endian_default; | |
441 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
442 | reg_endian = REGMAP_ENDIAN_BIG; | |
443 | ||
444 | val_endian = config->val_format_endian; | |
445 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
446 | val_endian = bus->val_format_endian_default; | |
447 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
448 | val_endian = REGMAP_ENDIAN_BIG; | |
449 | ||
d939fb9a | 450 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
451 | case 2: |
452 | switch (config->val_bits) { | |
453 | case 6: | |
454 | map->format.format_write = regmap_format_2_6_write; | |
455 | break; | |
456 | default: | |
457 | goto err_map; | |
458 | } | |
459 | break; | |
460 | ||
b83a313b MB |
461 | case 4: |
462 | switch (config->val_bits) { | |
463 | case 12: | |
464 | map->format.format_write = regmap_format_4_12_write; | |
465 | break; | |
466 | default: | |
467 | goto err_map; | |
468 | } | |
469 | break; | |
470 | ||
471 | case 7: | |
472 | switch (config->val_bits) { | |
473 | case 9: | |
474 | map->format.format_write = regmap_format_7_9_write; | |
475 | break; | |
476 | default: | |
477 | goto err_map; | |
478 | } | |
479 | break; | |
480 | ||
7e5ec63e LPC |
481 | case 10: |
482 | switch (config->val_bits) { | |
483 | case 14: | |
484 | map->format.format_write = regmap_format_10_14_write; | |
485 | break; | |
486 | default: | |
487 | goto err_map; | |
488 | } | |
489 | break; | |
490 | ||
b83a313b MB |
491 | case 8: |
492 | map->format.format_reg = regmap_format_8; | |
493 | break; | |
494 | ||
495 | case 16: | |
141eba2e SW |
496 | switch (reg_endian) { |
497 | case REGMAP_ENDIAN_BIG: | |
498 | map->format.format_reg = regmap_format_16_be; | |
499 | break; | |
500 | case REGMAP_ENDIAN_NATIVE: | |
501 | map->format.format_reg = regmap_format_16_native; | |
502 | break; | |
503 | default: | |
504 | goto err_map; | |
505 | } | |
b83a313b MB |
506 | break; |
507 | ||
7d5e525b | 508 | case 32: |
141eba2e SW |
509 | switch (reg_endian) { |
510 | case REGMAP_ENDIAN_BIG: | |
511 | map->format.format_reg = regmap_format_32_be; | |
512 | break; | |
513 | case REGMAP_ENDIAN_NATIVE: | |
514 | map->format.format_reg = regmap_format_32_native; | |
515 | break; | |
516 | default: | |
517 | goto err_map; | |
518 | } | |
7d5e525b MB |
519 | break; |
520 | ||
b83a313b MB |
521 | default: |
522 | goto err_map; | |
523 | } | |
524 | ||
525 | switch (config->val_bits) { | |
526 | case 8: | |
527 | map->format.format_val = regmap_format_8; | |
528 | map->format.parse_val = regmap_parse_8; | |
529 | break; | |
530 | case 16: | |
141eba2e SW |
531 | switch (val_endian) { |
532 | case REGMAP_ENDIAN_BIG: | |
533 | map->format.format_val = regmap_format_16_be; | |
534 | map->format.parse_val = regmap_parse_16_be; | |
535 | break; | |
536 | case REGMAP_ENDIAN_NATIVE: | |
537 | map->format.format_val = regmap_format_16_native; | |
538 | map->format.parse_val = regmap_parse_16_native; | |
539 | break; | |
540 | default: | |
541 | goto err_map; | |
542 | } | |
b83a313b | 543 | break; |
ea279fc5 | 544 | case 24: |
141eba2e SW |
545 | if (val_endian != REGMAP_ENDIAN_BIG) |
546 | goto err_map; | |
ea279fc5 MR |
547 | map->format.format_val = regmap_format_24; |
548 | map->format.parse_val = regmap_parse_24; | |
549 | break; | |
7d5e525b | 550 | case 32: |
141eba2e SW |
551 | switch (val_endian) { |
552 | case REGMAP_ENDIAN_BIG: | |
553 | map->format.format_val = regmap_format_32_be; | |
554 | map->format.parse_val = regmap_parse_32_be; | |
555 | break; | |
556 | case REGMAP_ENDIAN_NATIVE: | |
557 | map->format.format_val = regmap_format_32_native; | |
558 | map->format.parse_val = regmap_parse_32_native; | |
559 | break; | |
560 | default: | |
561 | goto err_map; | |
562 | } | |
7d5e525b | 563 | break; |
b83a313b MB |
564 | } |
565 | ||
141eba2e SW |
566 | if (map->format.format_write) { |
567 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
568 | (val_endian != REGMAP_ENDIAN_BIG)) | |
569 | goto err_map; | |
7a647614 | 570 | map->use_single_rw = true; |
141eba2e | 571 | } |
7a647614 | 572 | |
b83a313b MB |
573 | if (!map->format.format_write && |
574 | !(map->format.format_reg && map->format.format_val)) | |
575 | goto err_map; | |
576 | ||
82159ba8 | 577 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
578 | if (map->work_buf == NULL) { |
579 | ret = -ENOMEM; | |
5204f5e3 | 580 | goto err_map; |
b83a313b MB |
581 | } |
582 | ||
6863ca62 | 583 | map->range_tree = RB_ROOT; |
e3549cd0 | 584 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
585 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
586 | struct regmap_range_node *new; | |
587 | ||
588 | /* Sanity check */ | |
061adc06 MB |
589 | if (range_cfg->range_max < range_cfg->range_min) { |
590 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
591 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 592 | goto err_range; |
061adc06 MB |
593 | } |
594 | ||
595 | if (range_cfg->range_max > map->max_register) { | |
596 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
597 | range_cfg->range_max, map->max_register); | |
598 | goto err_range; | |
599 | } | |
600 | ||
601 | if (range_cfg->selector_reg > map->max_register) { | |
602 | dev_err(map->dev, | |
603 | "Invalid range %d: selector out of map\n", i); | |
604 | goto err_range; | |
605 | } | |
606 | ||
607 | if (range_cfg->window_len == 0) { | |
608 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
609 | i); | |
610 | goto err_range; | |
611 | } | |
6863ca62 KG |
612 | |
613 | /* Make sure, that this register range has no selector | |
614 | or data window within its boundary */ | |
e3549cd0 | 615 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
616 | unsigned sel_reg = config->ranges[j].selector_reg; |
617 | unsigned win_min = config->ranges[j].window_start; | |
618 | unsigned win_max = win_min + | |
619 | config->ranges[j].window_len - 1; | |
620 | ||
621 | if (range_cfg->range_min <= sel_reg && | |
622 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
623 | dev_err(map->dev, |
624 | "Range %d: selector for %d in window\n", | |
625 | i, j); | |
6863ca62 KG |
626 | goto err_range; |
627 | } | |
628 | ||
629 | if (!(win_max < range_cfg->range_min || | |
630 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
631 | dev_err(map->dev, |
632 | "Range %d: window for %d in window\n", | |
633 | i, j); | |
6863ca62 KG |
634 | goto err_range; |
635 | } | |
636 | } | |
637 | ||
638 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
639 | if (new == NULL) { | |
640 | ret = -ENOMEM; | |
641 | goto err_range; | |
642 | } | |
643 | ||
4b020b3f | 644 | new->map = map; |
d058bb49 | 645 | new->name = range_cfg->name; |
6863ca62 KG |
646 | new->range_min = range_cfg->range_min; |
647 | new->range_max = range_cfg->range_max; | |
648 | new->selector_reg = range_cfg->selector_reg; | |
649 | new->selector_mask = range_cfg->selector_mask; | |
650 | new->selector_shift = range_cfg->selector_shift; | |
651 | new->window_start = range_cfg->window_start; | |
652 | new->window_len = range_cfg->window_len; | |
653 | ||
654 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 655 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
656 | kfree(new); |
657 | goto err_range; | |
658 | } | |
659 | ||
660 | if (map->selector_work_buf == NULL) { | |
661 | map->selector_work_buf = | |
662 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
663 | if (map->selector_work_buf == NULL) { | |
664 | ret = -ENOMEM; | |
665 | goto err_range; | |
666 | } | |
667 | } | |
668 | } | |
052d2cd1 | 669 | |
e5e3b8ab | 670 | ret = regcache_init(map, config); |
0ff3e62f | 671 | if (ret != 0) |
6863ca62 KG |
672 | goto err_range; |
673 | ||
674 | regmap_debugfs_init(map, config->name); | |
5d1729e7 | 675 | |
72b39f6f MB |
676 | /* Add a devres resource for dev_get_regmap() */ |
677 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
678 | if (!m) { | |
679 | ret = -ENOMEM; | |
6863ca62 | 680 | goto err_debugfs; |
72b39f6f MB |
681 | } |
682 | *m = map; | |
683 | devres_add(dev, m); | |
684 | ||
b83a313b MB |
685 | return map; |
686 | ||
bfaa25f3 SW |
687 | err_debugfs: |
688 | regmap_debugfs_exit(map); | |
72b39f6f | 689 | regcache_exit(map); |
6863ca62 KG |
690 | err_range: |
691 | regmap_range_exit(map); | |
58072cbf | 692 | kfree(map->work_buf); |
b83a313b MB |
693 | err_map: |
694 | kfree(map); | |
695 | err: | |
696 | return ERR_PTR(ret); | |
697 | } | |
698 | EXPORT_SYMBOL_GPL(regmap_init); | |
699 | ||
c0eb4676 MB |
700 | static void devm_regmap_release(struct device *dev, void *res) |
701 | { | |
702 | regmap_exit(*(struct regmap **)res); | |
703 | } | |
704 | ||
705 | /** | |
706 | * devm_regmap_init(): Initialise managed register map | |
707 | * | |
708 | * @dev: Device that will be interacted with | |
709 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 710 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
711 | * @config: Configuration for register map |
712 | * | |
713 | * The return value will be an ERR_PTR() on error or a valid pointer | |
714 | * to a struct regmap. This function should generally not be called | |
715 | * directly, it should be called by bus-specific init functions. The | |
716 | * map will be automatically freed by the device management code. | |
717 | */ | |
718 | struct regmap *devm_regmap_init(struct device *dev, | |
719 | const struct regmap_bus *bus, | |
0135bbcc | 720 | void *bus_context, |
c0eb4676 MB |
721 | const struct regmap_config *config) |
722 | { | |
723 | struct regmap **ptr, *regmap; | |
724 | ||
725 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
726 | if (!ptr) | |
727 | return ERR_PTR(-ENOMEM); | |
728 | ||
0135bbcc | 729 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
730 | if (!IS_ERR(regmap)) { |
731 | *ptr = regmap; | |
732 | devres_add(dev, ptr); | |
733 | } else { | |
734 | devres_free(ptr); | |
735 | } | |
736 | ||
737 | return regmap; | |
738 | } | |
739 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
740 | ||
bf315173 MB |
741 | /** |
742 | * regmap_reinit_cache(): Reinitialise the current register cache | |
743 | * | |
744 | * @map: Register map to operate on. | |
745 | * @config: New configuration. Only the cache data will be used. | |
746 | * | |
747 | * Discard any existing register cache for the map and initialize a | |
748 | * new cache. This can be used to restore the cache to defaults or to | |
749 | * update the cache configuration to reflect runtime discovery of the | |
750 | * hardware. | |
4d879514 DP |
751 | * |
752 | * No explicit locking is done here, the user needs to ensure that | |
753 | * this function will not race with other calls to regmap. | |
bf315173 MB |
754 | */ |
755 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
756 | { | |
bf315173 | 757 | regcache_exit(map); |
a24f64a6 | 758 | regmap_debugfs_exit(map); |
bf315173 MB |
759 | |
760 | map->max_register = config->max_register; | |
761 | map->writeable_reg = config->writeable_reg; | |
762 | map->readable_reg = config->readable_reg; | |
763 | map->volatile_reg = config->volatile_reg; | |
764 | map->precious_reg = config->precious_reg; | |
765 | map->cache_type = config->cache_type; | |
766 | ||
d3c242e1 | 767 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 768 | |
421e8d2d MB |
769 | map->cache_bypass = false; |
770 | map->cache_only = false; | |
771 | ||
4d879514 | 772 | return regcache_init(map, config); |
bf315173 | 773 | } |
752a6a5f | 774 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 775 | |
b83a313b MB |
776 | /** |
777 | * regmap_exit(): Free a previously allocated register map | |
778 | */ | |
779 | void regmap_exit(struct regmap *map) | |
780 | { | |
5d1729e7 | 781 | regcache_exit(map); |
31244e39 | 782 | regmap_debugfs_exit(map); |
6863ca62 | 783 | regmap_range_exit(map); |
0135bbcc SW |
784 | if (map->bus->free_context) |
785 | map->bus->free_context(map->bus_context); | |
b83a313b | 786 | kfree(map->work_buf); |
b83a313b MB |
787 | kfree(map); |
788 | } | |
789 | EXPORT_SYMBOL_GPL(regmap_exit); | |
790 | ||
72b39f6f MB |
791 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
792 | { | |
793 | struct regmap **r = res; | |
794 | if (!r || !*r) { | |
795 | WARN_ON(!r || !*r); | |
796 | return 0; | |
797 | } | |
798 | ||
799 | /* If the user didn't specify a name match any */ | |
800 | if (data) | |
801 | return (*r)->name == data; | |
802 | else | |
803 | return 1; | |
804 | } | |
805 | ||
806 | /** | |
807 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
808 | * | |
809 | * @dev: Device to retrieve the map for | |
810 | * @name: Optional name for the register map, usually NULL. | |
811 | * | |
812 | * Returns the regmap for the device if one is present, or NULL. If | |
813 | * name is specified then it must match the name specified when | |
814 | * registering the device, if it is NULL then the first regmap found | |
815 | * will be used. Devices with multiple register maps are very rare, | |
816 | * generic code should normally not need to specify a name. | |
817 | */ | |
818 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
819 | { | |
820 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
821 | dev_get_regmap_match, (void *)name); | |
822 | ||
823 | if (!r) | |
824 | return NULL; | |
825 | return *r; | |
826 | } | |
827 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
828 | ||
6863ca62 | 829 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 830 | struct regmap_range_node *range, |
6863ca62 KG |
831 | unsigned int val_num) |
832 | { | |
6863ca62 KG |
833 | void *orig_work_buf; |
834 | unsigned int win_offset; | |
835 | unsigned int win_page; | |
836 | bool page_chg; | |
837 | int ret; | |
838 | ||
98bc7dfd MB |
839 | win_offset = (*reg - range->range_min) % range->window_len; |
840 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 841 | |
98bc7dfd MB |
842 | if (val_num > 1) { |
843 | /* Bulk write shouldn't cross range boundary */ | |
844 | if (*reg + val_num - 1 > range->range_max) | |
845 | return -EINVAL; | |
6863ca62 | 846 | |
98bc7dfd MB |
847 | /* ... or single page boundary */ |
848 | if (val_num > range->window_len - win_offset) | |
849 | return -EINVAL; | |
850 | } | |
6863ca62 | 851 | |
98bc7dfd MB |
852 | /* It is possible to have selector register inside data window. |
853 | In that case, selector register is located on every page and | |
854 | it needs no page switching, when accessed alone. */ | |
855 | if (val_num > 1 || | |
856 | range->window_start + win_offset != range->selector_reg) { | |
857 | /* Use separate work_buf during page switching */ | |
858 | orig_work_buf = map->work_buf; | |
859 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 860 | |
98bc7dfd MB |
861 | ret = _regmap_update_bits(map, range->selector_reg, |
862 | range->selector_mask, | |
863 | win_page << range->selector_shift, | |
864 | &page_chg); | |
632a5b01 | 865 | |
98bc7dfd | 866 | map->work_buf = orig_work_buf; |
6863ca62 | 867 | |
0ff3e62f | 868 | if (ret != 0) |
98bc7dfd | 869 | return ret; |
6863ca62 KG |
870 | } |
871 | ||
98bc7dfd MB |
872 | *reg = range->window_start + win_offset; |
873 | ||
6863ca62 KG |
874 | return 0; |
875 | } | |
876 | ||
b83a313b MB |
877 | static int _regmap_raw_write(struct regmap *map, unsigned int reg, |
878 | const void *val, size_t val_len) | |
879 | { | |
98bc7dfd | 880 | struct regmap_range_node *range; |
6f306441 | 881 | u8 *u8 = map->work_buf; |
b83a313b MB |
882 | void *buf; |
883 | int ret = -ENOTSUPP; | |
884 | size_t len; | |
73304781 MB |
885 | int i; |
886 | ||
887 | /* Check for unwritable registers before we start */ | |
888 | if (map->writeable_reg) | |
889 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
890 | if (!map->writeable_reg(map->dev, |
891 | reg + (i * map->reg_stride))) | |
73304781 | 892 | return -EINVAL; |
b83a313b | 893 | |
c9157198 LD |
894 | if (!map->cache_bypass && map->format.parse_val) { |
895 | unsigned int ival; | |
896 | int val_bytes = map->format.val_bytes; | |
897 | for (i = 0; i < val_len / val_bytes; i++) { | |
898 | memcpy(map->work_buf, val + (i * val_bytes), val_bytes); | |
899 | ival = map->format.parse_val(map->work_buf); | |
f01ee60f SW |
900 | ret = regcache_write(map, reg + (i * map->reg_stride), |
901 | ival); | |
c9157198 LD |
902 | if (ret) { |
903 | dev_err(map->dev, | |
6d04b8ac | 904 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
905 | reg + i, ret); |
906 | return ret; | |
907 | } | |
908 | } | |
909 | if (map->cache_only) { | |
910 | map->cache_dirty = true; | |
911 | return 0; | |
912 | } | |
913 | } | |
914 | ||
98bc7dfd MB |
915 | range = _regmap_range_lookup(map, reg); |
916 | if (range) { | |
8a2ceac6 MB |
917 | int val_num = val_len / map->format.val_bytes; |
918 | int win_offset = (reg - range->range_min) % range->window_len; | |
919 | int win_residue = range->window_len - win_offset; | |
920 | ||
921 | /* If the write goes beyond the end of the window split it */ | |
922 | while (val_num > win_residue) { | |
1a61cfe3 | 923 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
924 | win_residue, val_len / map->format.val_bytes); |
925 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
926 | map->format.val_bytes); | |
927 | if (ret != 0) | |
928 | return ret; | |
929 | ||
930 | reg += win_residue; | |
931 | val_num -= win_residue; | |
932 | val += win_residue * map->format.val_bytes; | |
933 | val_len -= win_residue * map->format.val_bytes; | |
934 | ||
935 | win_offset = (reg - range->range_min) % | |
936 | range->window_len; | |
937 | win_residue = range->window_len - win_offset; | |
938 | } | |
939 | ||
940 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 941 | if (ret != 0) |
98bc7dfd MB |
942 | return ret; |
943 | } | |
6863ca62 | 944 | |
d939fb9a | 945 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 946 | |
6f306441 LPC |
947 | u8[0] |= map->write_flag_mask; |
948 | ||
fb2736bb MB |
949 | trace_regmap_hw_write_start(map->dev, reg, |
950 | val_len / map->format.val_bytes); | |
951 | ||
2547e201 MB |
952 | /* If we're doing a single register write we can probably just |
953 | * send the work_buf directly, otherwise try to do a gather | |
954 | * write. | |
955 | */ | |
82159ba8 MB |
956 | if (val == (map->work_buf + map->format.pad_bytes + |
957 | map->format.reg_bytes)) | |
0135bbcc | 958 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
959 | map->format.reg_bytes + |
960 | map->format.pad_bytes + | |
961 | val_len); | |
2547e201 | 962 | else if (map->bus->gather_write) |
0135bbcc | 963 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
964 | map->format.reg_bytes + |
965 | map->format.pad_bytes, | |
b83a313b MB |
966 | val, val_len); |
967 | ||
2547e201 | 968 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 969 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
970 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
971 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
972 | if (!buf) |
973 | return -ENOMEM; | |
974 | ||
975 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
976 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
977 | val, val_len); | |
0135bbcc | 978 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
979 | |
980 | kfree(buf); | |
981 | } | |
982 | ||
fb2736bb MB |
983 | trace_regmap_hw_write_done(map->dev, reg, |
984 | val_len / map->format.val_bytes); | |
985 | ||
b83a313b MB |
986 | return ret; |
987 | } | |
988 | ||
4d2dc095 DP |
989 | int _regmap_write(struct regmap *map, unsigned int reg, |
990 | unsigned int val) | |
b83a313b | 991 | { |
98bc7dfd | 992 | struct regmap_range_node *range; |
fb2736bb | 993 | int ret; |
b83a313b MB |
994 | BUG_ON(!map->format.format_write && !map->format.format_val); |
995 | ||
c9157198 | 996 | if (!map->cache_bypass && map->format.format_write) { |
5d1729e7 DP |
997 | ret = regcache_write(map, reg, val); |
998 | if (ret != 0) | |
999 | return ret; | |
8ae0d7e8 MB |
1000 | if (map->cache_only) { |
1001 | map->cache_dirty = true; | |
5d1729e7 | 1002 | return 0; |
8ae0d7e8 | 1003 | } |
5d1729e7 DP |
1004 | } |
1005 | ||
1044c180 MB |
1006 | #ifdef LOG_DEVICE |
1007 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1008 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1009 | #endif | |
1010 | ||
fb2736bb MB |
1011 | trace_regmap_reg_write(map->dev, reg, val); |
1012 | ||
b83a313b | 1013 | if (map->format.format_write) { |
98bc7dfd MB |
1014 | range = _regmap_range_lookup(map, reg); |
1015 | if (range) { | |
1016 | ret = _regmap_select_page(map, ®, range, 1); | |
0ff3e62f | 1017 | if (ret != 0) |
98bc7dfd MB |
1018 | return ret; |
1019 | } | |
6863ca62 | 1020 | |
b83a313b MB |
1021 | map->format.format_write(map, reg, val); |
1022 | ||
fb2736bb MB |
1023 | trace_regmap_hw_write_start(map->dev, reg, 1); |
1024 | ||
0135bbcc | 1025 | ret = map->bus->write(map->bus_context, map->work_buf, |
fb2736bb MB |
1026 | map->format.buf_size); |
1027 | ||
1028 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1029 | ||
1030 | return ret; | |
b83a313b | 1031 | } else { |
82159ba8 | 1032 | map->format.format_val(map->work_buf + map->format.reg_bytes |
d939fb9a | 1033 | + map->format.pad_bytes, val, 0); |
b83a313b | 1034 | return _regmap_raw_write(map, reg, |
82159ba8 MB |
1035 | map->work_buf + |
1036 | map->format.reg_bytes + | |
1037 | map->format.pad_bytes, | |
b83a313b MB |
1038 | map->format.val_bytes); |
1039 | } | |
1040 | } | |
1041 | ||
1042 | /** | |
1043 | * regmap_write(): Write a value to a single register | |
1044 | * | |
1045 | * @map: Register map to write to | |
1046 | * @reg: Register to write to | |
1047 | * @val: Value to be written | |
1048 | * | |
1049 | * A value of zero will be returned on success, a negative errno will | |
1050 | * be returned in error cases. | |
1051 | */ | |
1052 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1053 | { | |
1054 | int ret; | |
1055 | ||
f01ee60f SW |
1056 | if (reg % map->reg_stride) |
1057 | return -EINVAL; | |
1058 | ||
0d4529c5 | 1059 | map->lock(map->lock_arg); |
b83a313b MB |
1060 | |
1061 | ret = _regmap_write(map, reg, val); | |
1062 | ||
0d4529c5 | 1063 | map->unlock(map->lock_arg); |
b83a313b MB |
1064 | |
1065 | return ret; | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(regmap_write); | |
1068 | ||
1069 | /** | |
1070 | * regmap_raw_write(): Write raw values to one or more registers | |
1071 | * | |
1072 | * @map: Register map to write to | |
1073 | * @reg: Initial register to write to | |
1074 | * @val: Block of data to be written, laid out for direct transmission to the | |
1075 | * device | |
1076 | * @val_len: Length of data pointed to by val. | |
1077 | * | |
1078 | * This function is intended to be used for things like firmware | |
1079 | * download where a large block of data needs to be transferred to the | |
1080 | * device. No formatting will be done on the data provided. | |
1081 | * | |
1082 | * A value of zero will be returned on success, a negative errno will | |
1083 | * be returned in error cases. | |
1084 | */ | |
1085 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1086 | const void *val, size_t val_len) | |
1087 | { | |
1088 | int ret; | |
1089 | ||
851960ba SW |
1090 | if (val_len % map->format.val_bytes) |
1091 | return -EINVAL; | |
f01ee60f SW |
1092 | if (reg % map->reg_stride) |
1093 | return -EINVAL; | |
851960ba | 1094 | |
0d4529c5 | 1095 | map->lock(map->lock_arg); |
b83a313b MB |
1096 | |
1097 | ret = _regmap_raw_write(map, reg, val, val_len); | |
1098 | ||
0d4529c5 | 1099 | map->unlock(map->lock_arg); |
b83a313b MB |
1100 | |
1101 | return ret; | |
1102 | } | |
1103 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1104 | ||
8eaeb219 LD |
1105 | /* |
1106 | * regmap_bulk_write(): Write multiple registers to the device | |
1107 | * | |
1108 | * @map: Register map to write to | |
1109 | * @reg: First register to be write from | |
1110 | * @val: Block of data to be written, in native register size for device | |
1111 | * @val_count: Number of registers to write | |
1112 | * | |
1113 | * This function is intended to be used for writing a large block of | |
1114 | * data to be device either in single transfer or multiple transfer. | |
1115 | * | |
1116 | * A value of zero will be returned on success, a negative errno will | |
1117 | * be returned in error cases. | |
1118 | */ | |
1119 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1120 | size_t val_count) | |
1121 | { | |
1122 | int ret = 0, i; | |
1123 | size_t val_bytes = map->format.val_bytes; | |
1124 | void *wval; | |
1125 | ||
1126 | if (!map->format.parse_val) | |
1127 | return -EINVAL; | |
f01ee60f SW |
1128 | if (reg % map->reg_stride) |
1129 | return -EINVAL; | |
8eaeb219 | 1130 | |
0d4529c5 | 1131 | map->lock(map->lock_arg); |
8eaeb219 LD |
1132 | |
1133 | /* No formatting is require if val_byte is 1 */ | |
1134 | if (val_bytes == 1) { | |
1135 | wval = (void *)val; | |
1136 | } else { | |
1137 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1138 | if (!wval) { | |
1139 | ret = -ENOMEM; | |
1140 | dev_err(map->dev, "Error in memory allocation\n"); | |
1141 | goto out; | |
1142 | } | |
1143 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1144 | map->format.parse_val(wval + i); | |
1145 | } | |
2e33caf1 AJ |
1146 | /* |
1147 | * Some devices does not support bulk write, for | |
1148 | * them we have a series of single write operations. | |
1149 | */ | |
1150 | if (map->use_single_rw) { | |
1151 | for (i = 0; i < val_count; i++) { | |
1152 | ret = regmap_raw_write(map, | |
1153 | reg + (i * map->reg_stride), | |
1154 | val + (i * val_bytes), | |
1155 | val_bytes); | |
1156 | if (ret != 0) | |
1157 | return ret; | |
1158 | } | |
1159 | } else { | |
1160 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); | |
1161 | } | |
8eaeb219 LD |
1162 | |
1163 | if (val_bytes != 1) | |
1164 | kfree(wval); | |
1165 | ||
1166 | out: | |
0d4529c5 | 1167 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1168 | return ret; |
1169 | } | |
1170 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1171 | ||
b83a313b MB |
1172 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1173 | unsigned int val_len) | |
1174 | { | |
98bc7dfd | 1175 | struct regmap_range_node *range; |
b83a313b MB |
1176 | u8 *u8 = map->work_buf; |
1177 | int ret; | |
1178 | ||
98bc7dfd MB |
1179 | range = _regmap_range_lookup(map, reg); |
1180 | if (range) { | |
1181 | ret = _regmap_select_page(map, ®, range, | |
1182 | val_len / map->format.val_bytes); | |
0ff3e62f | 1183 | if (ret != 0) |
98bc7dfd MB |
1184 | return ret; |
1185 | } | |
6863ca62 | 1186 | |
d939fb9a | 1187 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1188 | |
1189 | /* | |
6f306441 | 1190 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1191 | * register addresss; since it's always the high bits for all |
1192 | * current formats we can do this here rather than in | |
1193 | * formatting. This may break if we get interesting formats. | |
1194 | */ | |
6f306441 | 1195 | u8[0] |= map->read_flag_mask; |
b83a313b | 1196 | |
fb2736bb MB |
1197 | trace_regmap_hw_read_start(map->dev, reg, |
1198 | val_len / map->format.val_bytes); | |
1199 | ||
0135bbcc | 1200 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1201 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1202 | val, val_len); |
b83a313b | 1203 | |
fb2736bb MB |
1204 | trace_regmap_hw_read_done(map->dev, reg, |
1205 | val_len / map->format.val_bytes); | |
1206 | ||
1207 | return ret; | |
b83a313b MB |
1208 | } |
1209 | ||
ad278406 AS |
1210 | static int _regmap_bus_read(void *context, unsigned int reg, |
1211 | unsigned int *val) | |
1212 | { | |
1213 | int ret; | |
1214 | struct regmap *map = context; | |
1215 | ||
1216 | if (!map->format.parse_val) | |
1217 | return -EINVAL; | |
1218 | ||
1219 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1220 | if (ret == 0) | |
1221 | *val = map->format.parse_val(map->work_buf); | |
1222 | ||
1223 | return ret; | |
1224 | } | |
1225 | ||
b83a313b MB |
1226 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1227 | unsigned int *val) | |
1228 | { | |
1229 | int ret; | |
ad278406 | 1230 | BUG_ON(!map->reg_read); |
b83a313b | 1231 | |
5d1729e7 DP |
1232 | if (!map->cache_bypass) { |
1233 | ret = regcache_read(map, reg, val); | |
1234 | if (ret == 0) | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | if (map->cache_only) | |
1239 | return -EBUSY; | |
1240 | ||
ad278406 | 1241 | ret = map->reg_read(map, reg, val); |
fb2736bb | 1242 | if (ret == 0) { |
1044c180 MB |
1243 | #ifdef LOG_DEVICE |
1244 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1245 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1246 | #endif | |
1247 | ||
fb2736bb | 1248 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1249 | |
ad278406 AS |
1250 | if (!map->cache_bypass) |
1251 | regcache_write(map, reg, *val); | |
1252 | } | |
f2985367 | 1253 | |
b83a313b MB |
1254 | return ret; |
1255 | } | |
1256 | ||
1257 | /** | |
1258 | * regmap_read(): Read a value from a single register | |
1259 | * | |
1260 | * @map: Register map to write to | |
1261 | * @reg: Register to be read from | |
1262 | * @val: Pointer to store read value | |
1263 | * | |
1264 | * A value of zero will be returned on success, a negative errno will | |
1265 | * be returned in error cases. | |
1266 | */ | |
1267 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1268 | { | |
1269 | int ret; | |
1270 | ||
f01ee60f SW |
1271 | if (reg % map->reg_stride) |
1272 | return -EINVAL; | |
1273 | ||
0d4529c5 | 1274 | map->lock(map->lock_arg); |
b83a313b MB |
1275 | |
1276 | ret = _regmap_read(map, reg, val); | |
1277 | ||
0d4529c5 | 1278 | map->unlock(map->lock_arg); |
b83a313b MB |
1279 | |
1280 | return ret; | |
1281 | } | |
1282 | EXPORT_SYMBOL_GPL(regmap_read); | |
1283 | ||
1284 | /** | |
1285 | * regmap_raw_read(): Read raw data from the device | |
1286 | * | |
1287 | * @map: Register map to write to | |
1288 | * @reg: First register to be read from | |
1289 | * @val: Pointer to store read value | |
1290 | * @val_len: Size of data to read | |
1291 | * | |
1292 | * A value of zero will be returned on success, a negative errno will | |
1293 | * be returned in error cases. | |
1294 | */ | |
1295 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1296 | size_t val_len) | |
1297 | { | |
b8fb5ab1 MB |
1298 | size_t val_bytes = map->format.val_bytes; |
1299 | size_t val_count = val_len / val_bytes; | |
1300 | unsigned int v; | |
1301 | int ret, i; | |
04e016ad | 1302 | |
851960ba SW |
1303 | if (val_len % map->format.val_bytes) |
1304 | return -EINVAL; | |
f01ee60f SW |
1305 | if (reg % map->reg_stride) |
1306 | return -EINVAL; | |
851960ba | 1307 | |
0d4529c5 | 1308 | map->lock(map->lock_arg); |
b83a313b | 1309 | |
b8fb5ab1 MB |
1310 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1311 | map->cache_type == REGCACHE_NONE) { | |
1312 | /* Physical block read if there's no cache involved */ | |
1313 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1314 | ||
1315 | } else { | |
1316 | /* Otherwise go word by word for the cache; should be low | |
1317 | * cost as we expect to hit the cache. | |
1318 | */ | |
1319 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1320 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1321 | &v); | |
b8fb5ab1 MB |
1322 | if (ret != 0) |
1323 | goto out; | |
1324 | ||
d939fb9a | 1325 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1326 | } |
1327 | } | |
b83a313b | 1328 | |
b8fb5ab1 | 1329 | out: |
0d4529c5 | 1330 | map->unlock(map->lock_arg); |
b83a313b MB |
1331 | |
1332 | return ret; | |
1333 | } | |
1334 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1335 | ||
1336 | /** | |
1337 | * regmap_bulk_read(): Read multiple registers from the device | |
1338 | * | |
1339 | * @map: Register map to write to | |
1340 | * @reg: First register to be read from | |
1341 | * @val: Pointer to store read value, in native register size for device | |
1342 | * @val_count: Number of registers to read | |
1343 | * | |
1344 | * A value of zero will be returned on success, a negative errno will | |
1345 | * be returned in error cases. | |
1346 | */ | |
1347 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1348 | size_t val_count) | |
1349 | { | |
1350 | int ret, i; | |
1351 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1352 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1353 | |
b83a313b MB |
1354 | if (!map->format.parse_val) |
1355 | return -EINVAL; | |
f01ee60f SW |
1356 | if (reg % map->reg_stride) |
1357 | return -EINVAL; | |
b83a313b | 1358 | |
de2d808f | 1359 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1360 | /* |
1361 | * Some devices does not support bulk read, for | |
1362 | * them we have a series of single read operations. | |
1363 | */ | |
1364 | if (map->use_single_rw) { | |
1365 | for (i = 0; i < val_count; i++) { | |
1366 | ret = regmap_raw_read(map, | |
1367 | reg + (i * map->reg_stride), | |
1368 | val + (i * val_bytes), | |
1369 | val_bytes); | |
1370 | if (ret != 0) | |
1371 | return ret; | |
1372 | } | |
1373 | } else { | |
1374 | ret = regmap_raw_read(map, reg, val, | |
1375 | val_bytes * val_count); | |
1376 | if (ret != 0) | |
1377 | return ret; | |
1378 | } | |
de2d808f MB |
1379 | |
1380 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1381 | map->format.parse_val(val + i); | |
1382 | } else { | |
1383 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1384 | unsigned int ival; |
f01ee60f | 1385 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1386 | &ival); |
de2d808f MB |
1387 | if (ret != 0) |
1388 | return ret; | |
6560ffd1 | 1389 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1390 | } |
1391 | } | |
b83a313b MB |
1392 | |
1393 | return 0; | |
1394 | } | |
1395 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1396 | ||
018690d3 MB |
1397 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1398 | unsigned int mask, unsigned int val, | |
1399 | bool *change) | |
b83a313b MB |
1400 | { |
1401 | int ret; | |
d91e8db2 | 1402 | unsigned int tmp, orig; |
b83a313b | 1403 | |
d91e8db2 | 1404 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1405 | if (ret != 0) |
fc3ebd78 | 1406 | return ret; |
b83a313b | 1407 | |
d91e8db2 | 1408 | tmp = orig & ~mask; |
b83a313b MB |
1409 | tmp |= val & mask; |
1410 | ||
018690d3 | 1411 | if (tmp != orig) { |
d91e8db2 | 1412 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1413 | *change = true; |
1414 | } else { | |
1415 | *change = false; | |
1416 | } | |
b83a313b | 1417 | |
b83a313b MB |
1418 | return ret; |
1419 | } | |
018690d3 MB |
1420 | |
1421 | /** | |
1422 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1423 | * | |
1424 | * @map: Register map to update | |
1425 | * @reg: Register to update | |
1426 | * @mask: Bitmask to change | |
1427 | * @val: New value for bitmask | |
1428 | * | |
1429 | * Returns zero for success, a negative number on error. | |
1430 | */ | |
1431 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1432 | unsigned int mask, unsigned int val) | |
1433 | { | |
1434 | bool change; | |
fc3ebd78 KG |
1435 | int ret; |
1436 | ||
0d4529c5 | 1437 | map->lock(map->lock_arg); |
fc3ebd78 | 1438 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1439 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1440 | |
1441 | return ret; | |
018690d3 | 1442 | } |
b83a313b | 1443 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1444 | |
018690d3 MB |
1445 | /** |
1446 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1447 | * register map and report if updated | |
1448 | * | |
1449 | * @map: Register map to update | |
1450 | * @reg: Register to update | |
1451 | * @mask: Bitmask to change | |
1452 | * @val: New value for bitmask | |
1453 | * @change: Boolean indicating if a write was done | |
1454 | * | |
1455 | * Returns zero for success, a negative number on error. | |
1456 | */ | |
1457 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1458 | unsigned int mask, unsigned int val, | |
1459 | bool *change) | |
1460 | { | |
fc3ebd78 KG |
1461 | int ret; |
1462 | ||
0d4529c5 | 1463 | map->lock(map->lock_arg); |
fc3ebd78 | 1464 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1465 | map->unlock(map->lock_arg); |
fc3ebd78 | 1466 | return ret; |
018690d3 MB |
1467 | } |
1468 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1469 | ||
22f0d90a MB |
1470 | /** |
1471 | * regmap_register_patch: Register and apply register updates to be applied | |
1472 | * on device initialistion | |
1473 | * | |
1474 | * @map: Register map to apply updates to. | |
1475 | * @regs: Values to update. | |
1476 | * @num_regs: Number of entries in regs. | |
1477 | * | |
1478 | * Register a set of register updates to be applied to the device | |
1479 | * whenever the device registers are synchronised with the cache and | |
1480 | * apply them immediately. Typically this is used to apply | |
1481 | * corrections to be applied to the device defaults on startup, such | |
1482 | * as the updates some vendors provide to undocumented registers. | |
1483 | */ | |
1484 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1485 | int num_regs) | |
1486 | { | |
1487 | int i, ret; | |
1488 | bool bypass; | |
1489 | ||
1490 | /* If needed the implementation can be extended to support this */ | |
1491 | if (map->patch) | |
1492 | return -EBUSY; | |
1493 | ||
0d4529c5 | 1494 | map->lock(map->lock_arg); |
22f0d90a MB |
1495 | |
1496 | bypass = map->cache_bypass; | |
1497 | ||
1498 | map->cache_bypass = true; | |
1499 | ||
1500 | /* Write out first; it's useful to apply even if we fail later. */ | |
1501 | for (i = 0; i < num_regs; i++) { | |
1502 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1503 | if (ret != 0) { | |
1504 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1505 | regs[i].reg, regs[i].def, ret); | |
1506 | goto out; | |
1507 | } | |
1508 | } | |
1509 | ||
2a14d7d9 | 1510 | map->patch = kcalloc(num_regs, sizeof(struct reg_default), GFP_KERNEL); |
22f0d90a MB |
1511 | if (map->patch != NULL) { |
1512 | memcpy(map->patch, regs, | |
1513 | num_regs * sizeof(struct reg_default)); | |
1514 | map->patch_regs = num_regs; | |
1515 | } else { | |
1516 | ret = -ENOMEM; | |
1517 | } | |
1518 | ||
1519 | out: | |
1520 | map->cache_bypass = bypass; | |
1521 | ||
0d4529c5 | 1522 | map->unlock(map->lock_arg); |
22f0d90a MB |
1523 | |
1524 | return ret; | |
1525 | } | |
1526 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1527 | ||
eae4b51b | 1528 | /* |
a6539c32 MB |
1529 | * regmap_get_val_bytes(): Report the size of a register value |
1530 | * | |
1531 | * Report the size of a register value, mainly intended to for use by | |
1532 | * generic infrastructure built on top of regmap. | |
1533 | */ | |
1534 | int regmap_get_val_bytes(struct regmap *map) | |
1535 | { | |
1536 | if (map->format.format_write) | |
1537 | return -EINVAL; | |
1538 | ||
1539 | return map->format.val_bytes; | |
1540 | } | |
1541 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1542 | ||
31244e39 MB |
1543 | static int __init regmap_initcall(void) |
1544 | { | |
1545 | regmap_debugfs_initcall(); | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | postcore_initcall(regmap_initcall); |