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> |
30b2a553 | 19 | #include <linux/sched.h> |
b83a313b | 20 | |
fb2736bb MB |
21 | #define CREATE_TRACE_POINTS |
22 | #include <trace/events/regmap.h> | |
23 | ||
93de9124 | 24 | #include "internal.h" |
b83a313b | 25 | |
1044c180 MB |
26 | /* |
27 | * Sometimes for failures during very early init the trace | |
28 | * infrastructure isn't available early enough to be used. For this | |
29 | * sort of problem defining LOG_DEVICE will add printks for basic | |
30 | * register I/O on a specific device. | |
31 | */ | |
32 | #undef LOG_DEVICE | |
33 | ||
34 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
35 | unsigned int mask, unsigned int val, | |
36 | bool *change); | |
37 | ||
ad278406 AS |
38 | static int _regmap_bus_read(void *context, unsigned int reg, |
39 | unsigned int *val); | |
07c320dc AS |
40 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
41 | unsigned int val); | |
42 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
43 | unsigned int val); | |
ad278406 | 44 | |
0d509f2b MB |
45 | static void async_cleanup(struct work_struct *work) |
46 | { | |
47 | struct regmap_async *async = container_of(work, struct regmap_async, | |
48 | cleanup); | |
49 | ||
50 | kfree(async->work_buf); | |
51 | kfree(async); | |
52 | } | |
53 | ||
76aad392 DC |
54 | bool regmap_reg_in_ranges(unsigned int reg, |
55 | const struct regmap_range *ranges, | |
56 | unsigned int nranges) | |
57 | { | |
58 | const struct regmap_range *r; | |
59 | int i; | |
60 | ||
61 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
62 | if (regmap_reg_in_range(reg, r)) | |
63 | return true; | |
64 | return false; | |
65 | } | |
66 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
67 | ||
154881e5 MB |
68 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
69 | const struct regmap_access_table *table) | |
76aad392 DC |
70 | { |
71 | /* Check "no ranges" first */ | |
72 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
73 | return false; | |
74 | ||
75 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
76 | if (!table->n_yes_ranges) | |
77 | return true; | |
78 | ||
79 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
80 | table->n_yes_ranges); | |
81 | } | |
154881e5 | 82 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
76aad392 | 83 | |
8de2f081 MB |
84 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
85 | { | |
86 | if (map->max_register && reg > map->max_register) | |
87 | return false; | |
88 | ||
89 | if (map->writeable_reg) | |
90 | return map->writeable_reg(map->dev, reg); | |
91 | ||
76aad392 | 92 | if (map->wr_table) |
154881e5 | 93 | return regmap_check_range_table(map, reg, map->wr_table); |
76aad392 | 94 | |
8de2f081 MB |
95 | return true; |
96 | } | |
97 | ||
98 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
99 | { | |
100 | if (map->max_register && reg > map->max_register) | |
101 | return false; | |
102 | ||
4191f197 WS |
103 | if (map->format.format_write) |
104 | return false; | |
105 | ||
8de2f081 MB |
106 | if (map->readable_reg) |
107 | return map->readable_reg(map->dev, reg); | |
108 | ||
76aad392 | 109 | if (map->rd_table) |
154881e5 | 110 | return regmap_check_range_table(map, reg, map->rd_table); |
76aad392 | 111 | |
8de2f081 MB |
112 | return true; |
113 | } | |
114 | ||
115 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
116 | { | |
4191f197 | 117 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
118 | return false; |
119 | ||
120 | if (map->volatile_reg) | |
121 | return map->volatile_reg(map->dev, reg); | |
122 | ||
76aad392 | 123 | if (map->volatile_table) |
154881e5 | 124 | return regmap_check_range_table(map, reg, map->volatile_table); |
76aad392 | 125 | |
b92be6fe MB |
126 | if (map->cache_ops) |
127 | return false; | |
128 | else | |
129 | return true; | |
8de2f081 MB |
130 | } |
131 | ||
132 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
133 | { | |
4191f197 | 134 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
135 | return false; |
136 | ||
137 | if (map->precious_reg) | |
138 | return map->precious_reg(map->dev, reg); | |
139 | ||
76aad392 | 140 | if (map->precious_table) |
154881e5 | 141 | return regmap_check_range_table(map, reg, map->precious_table); |
76aad392 | 142 | |
8de2f081 MB |
143 | return false; |
144 | } | |
145 | ||
82cd9965 | 146 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 147 | size_t num) |
82cd9965 LPC |
148 | { |
149 | unsigned int i; | |
150 | ||
151 | for (i = 0; i < num; i++) | |
152 | if (!regmap_volatile(map, reg + i)) | |
153 | return false; | |
154 | ||
155 | return true; | |
156 | } | |
157 | ||
9aa50750 WS |
158 | static void regmap_format_2_6_write(struct regmap *map, |
159 | unsigned int reg, unsigned int val) | |
160 | { | |
161 | u8 *out = map->work_buf; | |
162 | ||
163 | *out = (reg << 6) | val; | |
164 | } | |
165 | ||
b83a313b MB |
166 | static void regmap_format_4_12_write(struct regmap *map, |
167 | unsigned int reg, unsigned int val) | |
168 | { | |
169 | __be16 *out = map->work_buf; | |
170 | *out = cpu_to_be16((reg << 12) | val); | |
171 | } | |
172 | ||
173 | static void regmap_format_7_9_write(struct regmap *map, | |
174 | unsigned int reg, unsigned int val) | |
175 | { | |
176 | __be16 *out = map->work_buf; | |
177 | *out = cpu_to_be16((reg << 9) | val); | |
178 | } | |
179 | ||
7e5ec63e LPC |
180 | static void regmap_format_10_14_write(struct regmap *map, |
181 | unsigned int reg, unsigned int val) | |
182 | { | |
183 | u8 *out = map->work_buf; | |
184 | ||
185 | out[2] = val; | |
186 | out[1] = (val >> 8) | (reg << 6); | |
187 | out[0] = reg >> 2; | |
188 | } | |
189 | ||
d939fb9a | 190 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
191 | { |
192 | u8 *b = buf; | |
193 | ||
d939fb9a | 194 | b[0] = val << shift; |
b83a313b MB |
195 | } |
196 | ||
141eba2e | 197 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
198 | { |
199 | __be16 *b = buf; | |
200 | ||
d939fb9a | 201 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
202 | } |
203 | ||
141eba2e SW |
204 | static void regmap_format_16_native(void *buf, unsigned int val, |
205 | unsigned int shift) | |
206 | { | |
207 | *(u16 *)buf = val << shift; | |
208 | } | |
209 | ||
d939fb9a | 210 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
211 | { |
212 | u8 *b = buf; | |
213 | ||
d939fb9a MR |
214 | val <<= shift; |
215 | ||
ea279fc5 MR |
216 | b[0] = val >> 16; |
217 | b[1] = val >> 8; | |
218 | b[2] = val; | |
219 | } | |
220 | ||
141eba2e | 221 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
222 | { |
223 | __be32 *b = buf; | |
224 | ||
d939fb9a | 225 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
226 | } |
227 | ||
141eba2e SW |
228 | static void regmap_format_32_native(void *buf, unsigned int val, |
229 | unsigned int shift) | |
230 | { | |
231 | *(u32 *)buf = val << shift; | |
232 | } | |
233 | ||
8a819ff8 | 234 | static void regmap_parse_inplace_noop(void *buf) |
b83a313b | 235 | { |
8a819ff8 MB |
236 | } |
237 | ||
238 | static unsigned int regmap_parse_8(const void *buf) | |
239 | { | |
240 | const u8 *b = buf; | |
b83a313b MB |
241 | |
242 | return b[0]; | |
243 | } | |
244 | ||
8a819ff8 MB |
245 | static unsigned int regmap_parse_16_be(const void *buf) |
246 | { | |
247 | const __be16 *b = buf; | |
248 | ||
249 | return be16_to_cpu(b[0]); | |
250 | } | |
251 | ||
252 | static void regmap_parse_16_be_inplace(void *buf) | |
b83a313b MB |
253 | { |
254 | __be16 *b = buf; | |
255 | ||
256 | b[0] = be16_to_cpu(b[0]); | |
b83a313b MB |
257 | } |
258 | ||
8a819ff8 | 259 | static unsigned int regmap_parse_16_native(const void *buf) |
141eba2e SW |
260 | { |
261 | return *(u16 *)buf; | |
262 | } | |
263 | ||
8a819ff8 | 264 | static unsigned int regmap_parse_24(const void *buf) |
ea279fc5 | 265 | { |
8a819ff8 | 266 | const u8 *b = buf; |
ea279fc5 MR |
267 | unsigned int ret = b[2]; |
268 | ret |= ((unsigned int)b[1]) << 8; | |
269 | ret |= ((unsigned int)b[0]) << 16; | |
270 | ||
271 | return ret; | |
272 | } | |
273 | ||
8a819ff8 MB |
274 | static unsigned int regmap_parse_32_be(const void *buf) |
275 | { | |
276 | const __be32 *b = buf; | |
277 | ||
278 | return be32_to_cpu(b[0]); | |
279 | } | |
280 | ||
281 | static void regmap_parse_32_be_inplace(void *buf) | |
7d5e525b MB |
282 | { |
283 | __be32 *b = buf; | |
284 | ||
285 | b[0] = be32_to_cpu(b[0]); | |
7d5e525b MB |
286 | } |
287 | ||
8a819ff8 | 288 | static unsigned int regmap_parse_32_native(const void *buf) |
141eba2e SW |
289 | { |
290 | return *(u32 *)buf; | |
291 | } | |
292 | ||
0d4529c5 | 293 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 294 | { |
0d4529c5 | 295 | struct regmap *map = __map; |
bacdbe07 SW |
296 | mutex_lock(&map->mutex); |
297 | } | |
298 | ||
0d4529c5 | 299 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 300 | { |
0d4529c5 | 301 | struct regmap *map = __map; |
bacdbe07 SW |
302 | mutex_unlock(&map->mutex); |
303 | } | |
304 | ||
0d4529c5 | 305 | static void regmap_lock_spinlock(void *__map) |
bacdbe07 | 306 | { |
0d4529c5 | 307 | struct regmap *map = __map; |
92ab1aab LPC |
308 | unsigned long flags; |
309 | ||
310 | spin_lock_irqsave(&map->spinlock, flags); | |
311 | map->spinlock_flags = flags; | |
bacdbe07 SW |
312 | } |
313 | ||
0d4529c5 | 314 | static void regmap_unlock_spinlock(void *__map) |
bacdbe07 | 315 | { |
0d4529c5 | 316 | struct regmap *map = __map; |
92ab1aab | 317 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
bacdbe07 SW |
318 | } |
319 | ||
72b39f6f MB |
320 | static void dev_get_regmap_release(struct device *dev, void *res) |
321 | { | |
322 | /* | |
323 | * We don't actually have anything to do here; the goal here | |
324 | * is not to manage the regmap but to provide a simple way to | |
325 | * get the regmap back given a struct device. | |
326 | */ | |
327 | } | |
328 | ||
6863ca62 KG |
329 | static bool _regmap_range_add(struct regmap *map, |
330 | struct regmap_range_node *data) | |
331 | { | |
332 | struct rb_root *root = &map->range_tree; | |
333 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
334 | ||
335 | while (*new) { | |
336 | struct regmap_range_node *this = | |
337 | container_of(*new, struct regmap_range_node, node); | |
338 | ||
339 | parent = *new; | |
340 | if (data->range_max < this->range_min) | |
341 | new = &((*new)->rb_left); | |
342 | else if (data->range_min > this->range_max) | |
343 | new = &((*new)->rb_right); | |
344 | else | |
345 | return false; | |
346 | } | |
347 | ||
348 | rb_link_node(&data->node, parent, new); | |
349 | rb_insert_color(&data->node, root); | |
350 | ||
351 | return true; | |
352 | } | |
353 | ||
354 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
355 | unsigned int reg) | |
356 | { | |
357 | struct rb_node *node = map->range_tree.rb_node; | |
358 | ||
359 | while (node) { | |
360 | struct regmap_range_node *this = | |
361 | container_of(node, struct regmap_range_node, node); | |
362 | ||
363 | if (reg < this->range_min) | |
364 | node = node->rb_left; | |
365 | else if (reg > this->range_max) | |
366 | node = node->rb_right; | |
367 | else | |
368 | return this; | |
369 | } | |
370 | ||
371 | return NULL; | |
372 | } | |
373 | ||
374 | static void regmap_range_exit(struct regmap *map) | |
375 | { | |
376 | struct rb_node *next; | |
377 | struct regmap_range_node *range_node; | |
378 | ||
379 | next = rb_first(&map->range_tree); | |
380 | while (next) { | |
381 | range_node = rb_entry(next, struct regmap_range_node, node); | |
382 | next = rb_next(&range_node->node); | |
383 | rb_erase(&range_node->node, &map->range_tree); | |
384 | kfree(range_node); | |
385 | } | |
386 | ||
387 | kfree(map->selector_work_buf); | |
388 | } | |
389 | ||
b83a313b MB |
390 | /** |
391 | * regmap_init(): Initialise register map | |
392 | * | |
393 | * @dev: Device that will be interacted with | |
394 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 395 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
396 | * @config: Configuration for register map |
397 | * | |
398 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
399 | * a struct regmap. This function should generally not be called | |
400 | * directly, it should be called by bus-specific init functions. | |
401 | */ | |
402 | struct regmap *regmap_init(struct device *dev, | |
403 | const struct regmap_bus *bus, | |
0135bbcc | 404 | void *bus_context, |
b83a313b MB |
405 | const struct regmap_config *config) |
406 | { | |
72b39f6f | 407 | struct regmap *map, **m; |
b83a313b | 408 | int ret = -EINVAL; |
141eba2e | 409 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 410 | int i, j; |
b83a313b | 411 | |
d2a5884a | 412 | if (!config) |
abbb18fb | 413 | goto err; |
b83a313b MB |
414 | |
415 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
416 | if (map == NULL) { | |
417 | ret = -ENOMEM; | |
418 | goto err; | |
419 | } | |
420 | ||
0d4529c5 DC |
421 | if (config->lock && config->unlock) { |
422 | map->lock = config->lock; | |
423 | map->unlock = config->unlock; | |
424 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 425 | } else { |
d2a5884a AS |
426 | if ((bus && bus->fast_io) || |
427 | config->fast_io) { | |
0d4529c5 DC |
428 | spin_lock_init(&map->spinlock); |
429 | map->lock = regmap_lock_spinlock; | |
430 | map->unlock = regmap_unlock_spinlock; | |
431 | } else { | |
432 | mutex_init(&map->mutex); | |
433 | map->lock = regmap_lock_mutex; | |
434 | map->unlock = regmap_unlock_mutex; | |
435 | } | |
436 | map->lock_arg = map; | |
bacdbe07 | 437 | } |
c212accc | 438 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 439 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 440 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
441 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
442 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 443 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
444 | if (config->reg_stride) |
445 | map->reg_stride = config->reg_stride; | |
446 | else | |
447 | map->reg_stride = 1; | |
2e33caf1 | 448 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
449 | map->dev = dev; |
450 | map->bus = bus; | |
0135bbcc | 451 | map->bus_context = bus_context; |
2e2ae66d | 452 | map->max_register = config->max_register; |
76aad392 DC |
453 | map->wr_table = config->wr_table; |
454 | map->rd_table = config->rd_table; | |
455 | map->volatile_table = config->volatile_table; | |
456 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
457 | map->writeable_reg = config->writeable_reg; |
458 | map->readable_reg = config->readable_reg; | |
459 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 460 | map->precious_reg = config->precious_reg; |
5d1729e7 | 461 | map->cache_type = config->cache_type; |
72b39f6f | 462 | map->name = config->name; |
b83a313b | 463 | |
0d509f2b MB |
464 | spin_lock_init(&map->async_lock); |
465 | INIT_LIST_HEAD(&map->async_list); | |
466 | init_waitqueue_head(&map->async_waitq); | |
467 | ||
6f306441 LPC |
468 | if (config->read_flag_mask || config->write_flag_mask) { |
469 | map->read_flag_mask = config->read_flag_mask; | |
470 | map->write_flag_mask = config->write_flag_mask; | |
d2a5884a | 471 | } else if (bus) { |
6f306441 LPC |
472 | map->read_flag_mask = bus->read_flag_mask; |
473 | } | |
474 | ||
d2a5884a AS |
475 | if (!bus) { |
476 | map->reg_read = config->reg_read; | |
477 | map->reg_write = config->reg_write; | |
478 | ||
479 | map->defer_caching = false; | |
480 | goto skip_format_initialization; | |
481 | } else { | |
482 | map->reg_read = _regmap_bus_read; | |
483 | } | |
ad278406 | 484 | |
141eba2e SW |
485 | reg_endian = config->reg_format_endian; |
486 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
487 | reg_endian = bus->reg_format_endian_default; | |
488 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
489 | reg_endian = REGMAP_ENDIAN_BIG; | |
490 | ||
491 | val_endian = config->val_format_endian; | |
492 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
493 | val_endian = bus->val_format_endian_default; | |
494 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
495 | val_endian = REGMAP_ENDIAN_BIG; | |
496 | ||
d939fb9a | 497 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
498 | case 2: |
499 | switch (config->val_bits) { | |
500 | case 6: | |
501 | map->format.format_write = regmap_format_2_6_write; | |
502 | break; | |
503 | default: | |
504 | goto err_map; | |
505 | } | |
506 | break; | |
507 | ||
b83a313b MB |
508 | case 4: |
509 | switch (config->val_bits) { | |
510 | case 12: | |
511 | map->format.format_write = regmap_format_4_12_write; | |
512 | break; | |
513 | default: | |
514 | goto err_map; | |
515 | } | |
516 | break; | |
517 | ||
518 | case 7: | |
519 | switch (config->val_bits) { | |
520 | case 9: | |
521 | map->format.format_write = regmap_format_7_9_write; | |
522 | break; | |
523 | default: | |
524 | goto err_map; | |
525 | } | |
526 | break; | |
527 | ||
7e5ec63e LPC |
528 | case 10: |
529 | switch (config->val_bits) { | |
530 | case 14: | |
531 | map->format.format_write = regmap_format_10_14_write; | |
532 | break; | |
533 | default: | |
534 | goto err_map; | |
535 | } | |
536 | break; | |
537 | ||
b83a313b MB |
538 | case 8: |
539 | map->format.format_reg = regmap_format_8; | |
540 | break; | |
541 | ||
542 | case 16: | |
141eba2e SW |
543 | switch (reg_endian) { |
544 | case REGMAP_ENDIAN_BIG: | |
545 | map->format.format_reg = regmap_format_16_be; | |
546 | break; | |
547 | case REGMAP_ENDIAN_NATIVE: | |
548 | map->format.format_reg = regmap_format_16_native; | |
549 | break; | |
550 | default: | |
551 | goto err_map; | |
552 | } | |
b83a313b MB |
553 | break; |
554 | ||
237019e7 LPC |
555 | case 24: |
556 | if (reg_endian != REGMAP_ENDIAN_BIG) | |
557 | goto err_map; | |
558 | map->format.format_reg = regmap_format_24; | |
559 | break; | |
560 | ||
7d5e525b | 561 | case 32: |
141eba2e SW |
562 | switch (reg_endian) { |
563 | case REGMAP_ENDIAN_BIG: | |
564 | map->format.format_reg = regmap_format_32_be; | |
565 | break; | |
566 | case REGMAP_ENDIAN_NATIVE: | |
567 | map->format.format_reg = regmap_format_32_native; | |
568 | break; | |
569 | default: | |
570 | goto err_map; | |
571 | } | |
7d5e525b MB |
572 | break; |
573 | ||
b83a313b MB |
574 | default: |
575 | goto err_map; | |
576 | } | |
577 | ||
8a819ff8 MB |
578 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
579 | map->format.parse_inplace = regmap_parse_inplace_noop; | |
580 | ||
b83a313b MB |
581 | switch (config->val_bits) { |
582 | case 8: | |
583 | map->format.format_val = regmap_format_8; | |
584 | map->format.parse_val = regmap_parse_8; | |
8a819ff8 | 585 | map->format.parse_inplace = regmap_parse_inplace_noop; |
b83a313b MB |
586 | break; |
587 | case 16: | |
141eba2e SW |
588 | switch (val_endian) { |
589 | case REGMAP_ENDIAN_BIG: | |
590 | map->format.format_val = regmap_format_16_be; | |
591 | map->format.parse_val = regmap_parse_16_be; | |
8a819ff8 | 592 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
141eba2e SW |
593 | break; |
594 | case REGMAP_ENDIAN_NATIVE: | |
595 | map->format.format_val = regmap_format_16_native; | |
596 | map->format.parse_val = regmap_parse_16_native; | |
597 | break; | |
598 | default: | |
599 | goto err_map; | |
600 | } | |
b83a313b | 601 | break; |
ea279fc5 | 602 | case 24: |
141eba2e SW |
603 | if (val_endian != REGMAP_ENDIAN_BIG) |
604 | goto err_map; | |
ea279fc5 MR |
605 | map->format.format_val = regmap_format_24; |
606 | map->format.parse_val = regmap_parse_24; | |
607 | break; | |
7d5e525b | 608 | case 32: |
141eba2e SW |
609 | switch (val_endian) { |
610 | case REGMAP_ENDIAN_BIG: | |
611 | map->format.format_val = regmap_format_32_be; | |
612 | map->format.parse_val = regmap_parse_32_be; | |
8a819ff8 | 613 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
141eba2e SW |
614 | break; |
615 | case REGMAP_ENDIAN_NATIVE: | |
616 | map->format.format_val = regmap_format_32_native; | |
617 | map->format.parse_val = regmap_parse_32_native; | |
618 | break; | |
619 | default: | |
620 | goto err_map; | |
621 | } | |
7d5e525b | 622 | break; |
b83a313b MB |
623 | } |
624 | ||
141eba2e SW |
625 | if (map->format.format_write) { |
626 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
627 | (val_endian != REGMAP_ENDIAN_BIG)) | |
628 | goto err_map; | |
7a647614 | 629 | map->use_single_rw = true; |
141eba2e | 630 | } |
7a647614 | 631 | |
b83a313b MB |
632 | if (!map->format.format_write && |
633 | !(map->format.format_reg && map->format.format_val)) | |
634 | goto err_map; | |
635 | ||
82159ba8 | 636 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
637 | if (map->work_buf == NULL) { |
638 | ret = -ENOMEM; | |
5204f5e3 | 639 | goto err_map; |
b83a313b MB |
640 | } |
641 | ||
d2a5884a AS |
642 | if (map->format.format_write) { |
643 | map->defer_caching = false; | |
07c320dc | 644 | map->reg_write = _regmap_bus_formatted_write; |
d2a5884a AS |
645 | } else if (map->format.format_val) { |
646 | map->defer_caching = true; | |
07c320dc | 647 | map->reg_write = _regmap_bus_raw_write; |
d2a5884a AS |
648 | } |
649 | ||
650 | skip_format_initialization: | |
07c320dc | 651 | |
6863ca62 | 652 | map->range_tree = RB_ROOT; |
e3549cd0 | 653 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
654 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
655 | struct regmap_range_node *new; | |
656 | ||
657 | /* Sanity check */ | |
061adc06 MB |
658 | if (range_cfg->range_max < range_cfg->range_min) { |
659 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
660 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 661 | goto err_range; |
061adc06 MB |
662 | } |
663 | ||
664 | if (range_cfg->range_max > map->max_register) { | |
665 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
666 | range_cfg->range_max, map->max_register); | |
667 | goto err_range; | |
668 | } | |
669 | ||
670 | if (range_cfg->selector_reg > map->max_register) { | |
671 | dev_err(map->dev, | |
672 | "Invalid range %d: selector out of map\n", i); | |
673 | goto err_range; | |
674 | } | |
675 | ||
676 | if (range_cfg->window_len == 0) { | |
677 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
678 | i); | |
679 | goto err_range; | |
680 | } | |
6863ca62 KG |
681 | |
682 | /* Make sure, that this register range has no selector | |
683 | or data window within its boundary */ | |
e3549cd0 | 684 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
685 | unsigned sel_reg = config->ranges[j].selector_reg; |
686 | unsigned win_min = config->ranges[j].window_start; | |
687 | unsigned win_max = win_min + | |
688 | config->ranges[j].window_len - 1; | |
689 | ||
690 | if (range_cfg->range_min <= sel_reg && | |
691 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
692 | dev_err(map->dev, |
693 | "Range %d: selector for %d in window\n", | |
694 | i, j); | |
6863ca62 KG |
695 | goto err_range; |
696 | } | |
697 | ||
698 | if (!(win_max < range_cfg->range_min || | |
699 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
700 | dev_err(map->dev, |
701 | "Range %d: window for %d in window\n", | |
702 | i, j); | |
6863ca62 KG |
703 | goto err_range; |
704 | } | |
705 | } | |
706 | ||
707 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
708 | if (new == NULL) { | |
709 | ret = -ENOMEM; | |
710 | goto err_range; | |
711 | } | |
712 | ||
4b020b3f | 713 | new->map = map; |
d058bb49 | 714 | new->name = range_cfg->name; |
6863ca62 KG |
715 | new->range_min = range_cfg->range_min; |
716 | new->range_max = range_cfg->range_max; | |
717 | new->selector_reg = range_cfg->selector_reg; | |
718 | new->selector_mask = range_cfg->selector_mask; | |
719 | new->selector_shift = range_cfg->selector_shift; | |
720 | new->window_start = range_cfg->window_start; | |
721 | new->window_len = range_cfg->window_len; | |
722 | ||
723 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 724 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
725 | kfree(new); |
726 | goto err_range; | |
727 | } | |
728 | ||
729 | if (map->selector_work_buf == NULL) { | |
730 | map->selector_work_buf = | |
731 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
732 | if (map->selector_work_buf == NULL) { | |
733 | ret = -ENOMEM; | |
734 | goto err_range; | |
735 | } | |
736 | } | |
737 | } | |
052d2cd1 | 738 | |
c6432ea9 DP |
739 | regmap_debugfs_init(map, config->name); |
740 | ||
e5e3b8ab | 741 | ret = regcache_init(map, config); |
0ff3e62f | 742 | if (ret != 0) |
6863ca62 KG |
743 | goto err_range; |
744 | ||
72b39f6f MB |
745 | /* Add a devres resource for dev_get_regmap() */ |
746 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
747 | if (!m) { | |
748 | ret = -ENOMEM; | |
6863ca62 | 749 | goto err_debugfs; |
72b39f6f MB |
750 | } |
751 | *m = map; | |
752 | devres_add(dev, m); | |
753 | ||
b83a313b MB |
754 | return map; |
755 | ||
bfaa25f3 SW |
756 | err_debugfs: |
757 | regmap_debugfs_exit(map); | |
72b39f6f | 758 | regcache_exit(map); |
6863ca62 KG |
759 | err_range: |
760 | regmap_range_exit(map); | |
58072cbf | 761 | kfree(map->work_buf); |
b83a313b MB |
762 | err_map: |
763 | kfree(map); | |
764 | err: | |
765 | return ERR_PTR(ret); | |
766 | } | |
767 | EXPORT_SYMBOL_GPL(regmap_init); | |
768 | ||
c0eb4676 MB |
769 | static void devm_regmap_release(struct device *dev, void *res) |
770 | { | |
771 | regmap_exit(*(struct regmap **)res); | |
772 | } | |
773 | ||
774 | /** | |
775 | * devm_regmap_init(): Initialise managed register map | |
776 | * | |
777 | * @dev: Device that will be interacted with | |
778 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 779 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
780 | * @config: Configuration for register map |
781 | * | |
782 | * The return value will be an ERR_PTR() on error or a valid pointer | |
783 | * to a struct regmap. This function should generally not be called | |
784 | * directly, it should be called by bus-specific init functions. The | |
785 | * map will be automatically freed by the device management code. | |
786 | */ | |
787 | struct regmap *devm_regmap_init(struct device *dev, | |
788 | const struct regmap_bus *bus, | |
0135bbcc | 789 | void *bus_context, |
c0eb4676 MB |
790 | const struct regmap_config *config) |
791 | { | |
792 | struct regmap **ptr, *regmap; | |
793 | ||
794 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
795 | if (!ptr) | |
796 | return ERR_PTR(-ENOMEM); | |
797 | ||
0135bbcc | 798 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
799 | if (!IS_ERR(regmap)) { |
800 | *ptr = regmap; | |
801 | devres_add(dev, ptr); | |
802 | } else { | |
803 | devres_free(ptr); | |
804 | } | |
805 | ||
806 | return regmap; | |
807 | } | |
808 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
809 | ||
67252287 SK |
810 | static void regmap_field_init(struct regmap_field *rm_field, |
811 | struct regmap *regmap, struct reg_field reg_field) | |
812 | { | |
813 | int field_bits = reg_field.msb - reg_field.lsb + 1; | |
814 | rm_field->regmap = regmap; | |
815 | rm_field->reg = reg_field.reg; | |
816 | rm_field->shift = reg_field.lsb; | |
817 | rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); | |
818 | } | |
819 | ||
820 | /** | |
821 | * devm_regmap_field_alloc(): Allocate and initialise a register field | |
822 | * in a register map. | |
823 | * | |
824 | * @dev: Device that will be interacted with | |
825 | * @regmap: regmap bank in which this register field is located. | |
826 | * @reg_field: Register field with in the bank. | |
827 | * | |
828 | * The return value will be an ERR_PTR() on error or a valid pointer | |
829 | * to a struct regmap_field. The regmap_field will be automatically freed | |
830 | * by the device management code. | |
831 | */ | |
832 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, | |
833 | struct regmap *regmap, struct reg_field reg_field) | |
834 | { | |
835 | struct regmap_field *rm_field = devm_kzalloc(dev, | |
836 | sizeof(*rm_field), GFP_KERNEL); | |
837 | if (!rm_field) | |
838 | return ERR_PTR(-ENOMEM); | |
839 | ||
840 | regmap_field_init(rm_field, regmap, reg_field); | |
841 | ||
842 | return rm_field; | |
843 | ||
844 | } | |
845 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); | |
846 | ||
847 | /** | |
848 | * devm_regmap_field_free(): Free register field allocated using | |
849 | * devm_regmap_field_alloc. Usally drivers need not call this function, | |
850 | * as the memory allocated via devm will be freed as per device-driver | |
851 | * life-cyle. | |
852 | * | |
853 | * @dev: Device that will be interacted with | |
854 | * @field: regmap field which should be freed. | |
855 | */ | |
856 | void devm_regmap_field_free(struct device *dev, | |
857 | struct regmap_field *field) | |
858 | { | |
859 | devm_kfree(dev, field); | |
860 | } | |
861 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); | |
862 | ||
863 | /** | |
864 | * regmap_field_alloc(): Allocate and initialise a register field | |
865 | * in a register map. | |
866 | * | |
867 | * @regmap: regmap bank in which this register field is located. | |
868 | * @reg_field: Register field with in the bank. | |
869 | * | |
870 | * The return value will be an ERR_PTR() on error or a valid pointer | |
871 | * to a struct regmap_field. The regmap_field should be freed by the | |
872 | * user once its finished working with it using regmap_field_free(). | |
873 | */ | |
874 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, | |
875 | struct reg_field reg_field) | |
876 | { | |
877 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); | |
878 | ||
879 | if (!rm_field) | |
880 | return ERR_PTR(-ENOMEM); | |
881 | ||
882 | regmap_field_init(rm_field, regmap, reg_field); | |
883 | ||
884 | return rm_field; | |
885 | } | |
886 | EXPORT_SYMBOL_GPL(regmap_field_alloc); | |
887 | ||
888 | /** | |
889 | * regmap_field_free(): Free register field allocated using regmap_field_alloc | |
890 | * | |
891 | * @field: regmap field which should be freed. | |
892 | */ | |
893 | void regmap_field_free(struct regmap_field *field) | |
894 | { | |
895 | kfree(field); | |
896 | } | |
897 | EXPORT_SYMBOL_GPL(regmap_field_free); | |
898 | ||
bf315173 MB |
899 | /** |
900 | * regmap_reinit_cache(): Reinitialise the current register cache | |
901 | * | |
902 | * @map: Register map to operate on. | |
903 | * @config: New configuration. Only the cache data will be used. | |
904 | * | |
905 | * Discard any existing register cache for the map and initialize a | |
906 | * new cache. This can be used to restore the cache to defaults or to | |
907 | * update the cache configuration to reflect runtime discovery of the | |
908 | * hardware. | |
4d879514 DP |
909 | * |
910 | * No explicit locking is done here, the user needs to ensure that | |
911 | * this function will not race with other calls to regmap. | |
bf315173 MB |
912 | */ |
913 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
914 | { | |
bf315173 | 915 | regcache_exit(map); |
a24f64a6 | 916 | regmap_debugfs_exit(map); |
bf315173 MB |
917 | |
918 | map->max_register = config->max_register; | |
919 | map->writeable_reg = config->writeable_reg; | |
920 | map->readable_reg = config->readable_reg; | |
921 | map->volatile_reg = config->volatile_reg; | |
922 | map->precious_reg = config->precious_reg; | |
923 | map->cache_type = config->cache_type; | |
924 | ||
d3c242e1 | 925 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 926 | |
421e8d2d MB |
927 | map->cache_bypass = false; |
928 | map->cache_only = false; | |
929 | ||
4d879514 | 930 | return regcache_init(map, config); |
bf315173 | 931 | } |
752a6a5f | 932 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 933 | |
b83a313b MB |
934 | /** |
935 | * regmap_exit(): Free a previously allocated register map | |
936 | */ | |
937 | void regmap_exit(struct regmap *map) | |
938 | { | |
5d1729e7 | 939 | regcache_exit(map); |
31244e39 | 940 | regmap_debugfs_exit(map); |
6863ca62 | 941 | regmap_range_exit(map); |
d2a5884a | 942 | if (map->bus && map->bus->free_context) |
0135bbcc | 943 | map->bus->free_context(map->bus_context); |
b83a313b | 944 | kfree(map->work_buf); |
b83a313b MB |
945 | kfree(map); |
946 | } | |
947 | EXPORT_SYMBOL_GPL(regmap_exit); | |
948 | ||
72b39f6f MB |
949 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
950 | { | |
951 | struct regmap **r = res; | |
952 | if (!r || !*r) { | |
953 | WARN_ON(!r || !*r); | |
954 | return 0; | |
955 | } | |
956 | ||
957 | /* If the user didn't specify a name match any */ | |
958 | if (data) | |
959 | return (*r)->name == data; | |
960 | else | |
961 | return 1; | |
962 | } | |
963 | ||
964 | /** | |
965 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
966 | * | |
967 | * @dev: Device to retrieve the map for | |
968 | * @name: Optional name for the register map, usually NULL. | |
969 | * | |
970 | * Returns the regmap for the device if one is present, or NULL. If | |
971 | * name is specified then it must match the name specified when | |
972 | * registering the device, if it is NULL then the first regmap found | |
973 | * will be used. Devices with multiple register maps are very rare, | |
974 | * generic code should normally not need to specify a name. | |
975 | */ | |
976 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
977 | { | |
978 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
979 | dev_get_regmap_match, (void *)name); | |
980 | ||
981 | if (!r) | |
982 | return NULL; | |
983 | return *r; | |
984 | } | |
985 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
986 | ||
6863ca62 | 987 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 988 | struct regmap_range_node *range, |
6863ca62 KG |
989 | unsigned int val_num) |
990 | { | |
6863ca62 KG |
991 | void *orig_work_buf; |
992 | unsigned int win_offset; | |
993 | unsigned int win_page; | |
994 | bool page_chg; | |
995 | int ret; | |
996 | ||
98bc7dfd MB |
997 | win_offset = (*reg - range->range_min) % range->window_len; |
998 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 999 | |
98bc7dfd MB |
1000 | if (val_num > 1) { |
1001 | /* Bulk write shouldn't cross range boundary */ | |
1002 | if (*reg + val_num - 1 > range->range_max) | |
1003 | return -EINVAL; | |
6863ca62 | 1004 | |
98bc7dfd MB |
1005 | /* ... or single page boundary */ |
1006 | if (val_num > range->window_len - win_offset) | |
1007 | return -EINVAL; | |
1008 | } | |
6863ca62 | 1009 | |
98bc7dfd MB |
1010 | /* It is possible to have selector register inside data window. |
1011 | In that case, selector register is located on every page and | |
1012 | it needs no page switching, when accessed alone. */ | |
1013 | if (val_num > 1 || | |
1014 | range->window_start + win_offset != range->selector_reg) { | |
1015 | /* Use separate work_buf during page switching */ | |
1016 | orig_work_buf = map->work_buf; | |
1017 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 1018 | |
98bc7dfd MB |
1019 | ret = _regmap_update_bits(map, range->selector_reg, |
1020 | range->selector_mask, | |
1021 | win_page << range->selector_shift, | |
1022 | &page_chg); | |
632a5b01 | 1023 | |
98bc7dfd | 1024 | map->work_buf = orig_work_buf; |
6863ca62 | 1025 | |
0ff3e62f | 1026 | if (ret != 0) |
98bc7dfd | 1027 | return ret; |
6863ca62 KG |
1028 | } |
1029 | ||
98bc7dfd MB |
1030 | *reg = range->window_start + win_offset; |
1031 | ||
6863ca62 KG |
1032 | return 0; |
1033 | } | |
1034 | ||
584de329 MB |
1035 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
1036 | const void *val, size_t val_len, bool async) | |
b83a313b | 1037 | { |
98bc7dfd | 1038 | struct regmap_range_node *range; |
0d509f2b | 1039 | unsigned long flags; |
6f306441 | 1040 | u8 *u8 = map->work_buf; |
0d509f2b MB |
1041 | void *work_val = map->work_buf + map->format.reg_bytes + |
1042 | map->format.pad_bytes; | |
b83a313b MB |
1043 | void *buf; |
1044 | int ret = -ENOTSUPP; | |
1045 | size_t len; | |
73304781 MB |
1046 | int i; |
1047 | ||
f1b5c5c3 | 1048 | WARN_ON(!map->bus); |
d2a5884a | 1049 | |
73304781 MB |
1050 | /* Check for unwritable registers before we start */ |
1051 | if (map->writeable_reg) | |
1052 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
1053 | if (!map->writeable_reg(map->dev, |
1054 | reg + (i * map->reg_stride))) | |
73304781 | 1055 | return -EINVAL; |
b83a313b | 1056 | |
c9157198 LD |
1057 | if (!map->cache_bypass && map->format.parse_val) { |
1058 | unsigned int ival; | |
1059 | int val_bytes = map->format.val_bytes; | |
1060 | for (i = 0; i < val_len / val_bytes; i++) { | |
5a08d156 | 1061 | ival = map->format.parse_val(val + (i * val_bytes)); |
f01ee60f SW |
1062 | ret = regcache_write(map, reg + (i * map->reg_stride), |
1063 | ival); | |
c9157198 LD |
1064 | if (ret) { |
1065 | dev_err(map->dev, | |
6d04b8ac | 1066 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
1067 | reg + i, ret); |
1068 | return ret; | |
1069 | } | |
1070 | } | |
1071 | if (map->cache_only) { | |
1072 | map->cache_dirty = true; | |
1073 | return 0; | |
1074 | } | |
1075 | } | |
1076 | ||
98bc7dfd MB |
1077 | range = _regmap_range_lookup(map, reg); |
1078 | if (range) { | |
8a2ceac6 MB |
1079 | int val_num = val_len / map->format.val_bytes; |
1080 | int win_offset = (reg - range->range_min) % range->window_len; | |
1081 | int win_residue = range->window_len - win_offset; | |
1082 | ||
1083 | /* If the write goes beyond the end of the window split it */ | |
1084 | while (val_num > win_residue) { | |
1a61cfe3 | 1085 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
1086 | win_residue, val_len / map->format.val_bytes); |
1087 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0d509f2b | 1088 | map->format.val_bytes, async); |
8a2ceac6 MB |
1089 | if (ret != 0) |
1090 | return ret; | |
1091 | ||
1092 | reg += win_residue; | |
1093 | val_num -= win_residue; | |
1094 | val += win_residue * map->format.val_bytes; | |
1095 | val_len -= win_residue * map->format.val_bytes; | |
1096 | ||
1097 | win_offset = (reg - range->range_min) % | |
1098 | range->window_len; | |
1099 | win_residue = range->window_len - win_offset; | |
1100 | } | |
1101 | ||
1102 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 1103 | if (ret != 0) |
98bc7dfd MB |
1104 | return ret; |
1105 | } | |
6863ca62 | 1106 | |
d939fb9a | 1107 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 1108 | |
6f306441 LPC |
1109 | u8[0] |= map->write_flag_mask; |
1110 | ||
0d509f2b MB |
1111 | if (async && map->bus->async_write) { |
1112 | struct regmap_async *async = map->bus->async_alloc(); | |
1113 | if (!async) | |
1114 | return -ENOMEM; | |
1115 | ||
fe7d4ccd MB |
1116 | trace_regmap_async_write_start(map->dev, reg, val_len); |
1117 | ||
0d509f2b MB |
1118 | async->work_buf = kzalloc(map->format.buf_size, |
1119 | GFP_KERNEL | GFP_DMA); | |
1120 | if (!async->work_buf) { | |
1121 | kfree(async); | |
1122 | return -ENOMEM; | |
1123 | } | |
1124 | ||
1125 | INIT_WORK(&async->cleanup, async_cleanup); | |
1126 | async->map = map; | |
1127 | ||
1128 | /* If the caller supplied the value we can use it safely. */ | |
1129 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
1130 | map->format.reg_bytes + map->format.val_bytes); | |
1131 | if (val == work_val) | |
1132 | val = async->work_buf + map->format.pad_bytes + | |
1133 | map->format.reg_bytes; | |
1134 | ||
1135 | spin_lock_irqsave(&map->async_lock, flags); | |
1136 | list_add_tail(&async->list, &map->async_list); | |
1137 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1138 | ||
1139 | ret = map->bus->async_write(map->bus_context, async->work_buf, | |
1140 | map->format.reg_bytes + | |
1141 | map->format.pad_bytes, | |
1142 | val, val_len, async); | |
1143 | ||
1144 | if (ret != 0) { | |
1145 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1146 | ret); | |
1147 | ||
1148 | spin_lock_irqsave(&map->async_lock, flags); | |
1149 | list_del(&async->list); | |
1150 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1151 | ||
1152 | kfree(async->work_buf); | |
1153 | kfree(async); | |
1154 | } | |
f951b658 MB |
1155 | |
1156 | return ret; | |
0d509f2b MB |
1157 | } |
1158 | ||
fb2736bb MB |
1159 | trace_regmap_hw_write_start(map->dev, reg, |
1160 | val_len / map->format.val_bytes); | |
1161 | ||
2547e201 MB |
1162 | /* If we're doing a single register write we can probably just |
1163 | * send the work_buf directly, otherwise try to do a gather | |
1164 | * write. | |
1165 | */ | |
0d509f2b | 1166 | if (val == work_val) |
0135bbcc | 1167 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1168 | map->format.reg_bytes + |
1169 | map->format.pad_bytes + | |
1170 | val_len); | |
2547e201 | 1171 | else if (map->bus->gather_write) |
0135bbcc | 1172 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1173 | map->format.reg_bytes + |
1174 | map->format.pad_bytes, | |
b83a313b MB |
1175 | val, val_len); |
1176 | ||
2547e201 | 1177 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1178 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1179 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1180 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1181 | if (!buf) |
1182 | return -ENOMEM; | |
1183 | ||
1184 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1185 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1186 | val, val_len); | |
0135bbcc | 1187 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1188 | |
1189 | kfree(buf); | |
1190 | } | |
1191 | ||
fb2736bb MB |
1192 | trace_regmap_hw_write_done(map->dev, reg, |
1193 | val_len / map->format.val_bytes); | |
1194 | ||
b83a313b MB |
1195 | return ret; |
1196 | } | |
1197 | ||
221ad7f2 MB |
1198 | /** |
1199 | * regmap_can_raw_write - Test if regmap_raw_write() is supported | |
1200 | * | |
1201 | * @map: Map to check. | |
1202 | */ | |
1203 | bool regmap_can_raw_write(struct regmap *map) | |
1204 | { | |
1205 | return map->bus && map->format.format_val && map->format.format_reg; | |
1206 | } | |
1207 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); | |
1208 | ||
07c320dc AS |
1209 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1210 | unsigned int val) | |
1211 | { | |
1212 | int ret; | |
1213 | struct regmap_range_node *range; | |
1214 | struct regmap *map = context; | |
1215 | ||
f1b5c5c3 | 1216 | WARN_ON(!map->bus || !map->format.format_write); |
07c320dc AS |
1217 | |
1218 | range = _regmap_range_lookup(map, reg); | |
1219 | if (range) { | |
1220 | ret = _regmap_select_page(map, ®, range, 1); | |
1221 | if (ret != 0) | |
1222 | return ret; | |
1223 | } | |
1224 | ||
1225 | map->format.format_write(map, reg, val); | |
1226 | ||
1227 | trace_regmap_hw_write_start(map->dev, reg, 1); | |
1228 | ||
1229 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1230 | map->format.buf_size); | |
1231 | ||
1232 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1233 | ||
1234 | return ret; | |
1235 | } | |
1236 | ||
1237 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
1238 | unsigned int val) | |
1239 | { | |
1240 | struct regmap *map = context; | |
1241 | ||
f1b5c5c3 | 1242 | WARN_ON(!map->bus || !map->format.format_val); |
07c320dc AS |
1243 | |
1244 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1245 | + map->format.pad_bytes, val, 0); | |
1246 | return _regmap_raw_write(map, reg, | |
1247 | map->work_buf + | |
1248 | map->format.reg_bytes + | |
1249 | map->format.pad_bytes, | |
0d509f2b | 1250 | map->format.val_bytes, false); |
07c320dc AS |
1251 | } |
1252 | ||
d2a5884a AS |
1253 | static inline void *_regmap_map_get_context(struct regmap *map) |
1254 | { | |
1255 | return (map->bus) ? map : map->bus_context; | |
1256 | } | |
1257 | ||
4d2dc095 DP |
1258 | int _regmap_write(struct regmap *map, unsigned int reg, |
1259 | unsigned int val) | |
b83a313b | 1260 | { |
fb2736bb | 1261 | int ret; |
d2a5884a | 1262 | void *context = _regmap_map_get_context(map); |
b83a313b | 1263 | |
d2a5884a | 1264 | if (!map->cache_bypass && !map->defer_caching) { |
5d1729e7 DP |
1265 | ret = regcache_write(map, reg, val); |
1266 | if (ret != 0) | |
1267 | return ret; | |
8ae0d7e8 MB |
1268 | if (map->cache_only) { |
1269 | map->cache_dirty = true; | |
5d1729e7 | 1270 | return 0; |
8ae0d7e8 | 1271 | } |
5d1729e7 DP |
1272 | } |
1273 | ||
1044c180 MB |
1274 | #ifdef LOG_DEVICE |
1275 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1276 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1277 | #endif | |
1278 | ||
fb2736bb MB |
1279 | trace_regmap_reg_write(map->dev, reg, val); |
1280 | ||
d2a5884a | 1281 | return map->reg_write(context, reg, val); |
b83a313b MB |
1282 | } |
1283 | ||
1284 | /** | |
1285 | * regmap_write(): Write a value to a single register | |
1286 | * | |
1287 | * @map: Register map to write to | |
1288 | * @reg: Register to write to | |
1289 | * @val: Value to be written | |
1290 | * | |
1291 | * A value of zero will be returned on success, a negative errno will | |
1292 | * be returned in error cases. | |
1293 | */ | |
1294 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1295 | { | |
1296 | int ret; | |
1297 | ||
f01ee60f SW |
1298 | if (reg % map->reg_stride) |
1299 | return -EINVAL; | |
1300 | ||
0d4529c5 | 1301 | map->lock(map->lock_arg); |
b83a313b MB |
1302 | |
1303 | ret = _regmap_write(map, reg, val); | |
1304 | ||
0d4529c5 | 1305 | map->unlock(map->lock_arg); |
b83a313b MB |
1306 | |
1307 | return ret; | |
1308 | } | |
1309 | EXPORT_SYMBOL_GPL(regmap_write); | |
1310 | ||
1311 | /** | |
1312 | * regmap_raw_write(): Write raw values to one or more registers | |
1313 | * | |
1314 | * @map: Register map to write to | |
1315 | * @reg: Initial register to write to | |
1316 | * @val: Block of data to be written, laid out for direct transmission to the | |
1317 | * device | |
1318 | * @val_len: Length of data pointed to by val. | |
1319 | * | |
1320 | * This function is intended to be used for things like firmware | |
1321 | * download where a large block of data needs to be transferred to the | |
1322 | * device. No formatting will be done on the data provided. | |
1323 | * | |
1324 | * A value of zero will be returned on success, a negative errno will | |
1325 | * be returned in error cases. | |
1326 | */ | |
1327 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1328 | const void *val, size_t val_len) | |
1329 | { | |
1330 | int ret; | |
1331 | ||
221ad7f2 | 1332 | if (!regmap_can_raw_write(map)) |
d2a5884a | 1333 | return -EINVAL; |
851960ba SW |
1334 | if (val_len % map->format.val_bytes) |
1335 | return -EINVAL; | |
1336 | ||
0d4529c5 | 1337 | map->lock(map->lock_arg); |
b83a313b | 1338 | |
0d509f2b | 1339 | ret = _regmap_raw_write(map, reg, val, val_len, false); |
b83a313b | 1340 | |
0d4529c5 | 1341 | map->unlock(map->lock_arg); |
b83a313b MB |
1342 | |
1343 | return ret; | |
1344 | } | |
1345 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1346 | ||
67252287 SK |
1347 | /** |
1348 | * regmap_field_write(): Write a value to a single register field | |
1349 | * | |
1350 | * @field: Register field to write to | |
1351 | * @val: Value to be written | |
1352 | * | |
1353 | * A value of zero will be returned on success, a negative errno will | |
1354 | * be returned in error cases. | |
1355 | */ | |
1356 | int regmap_field_write(struct regmap_field *field, unsigned int val) | |
1357 | { | |
1358 | return regmap_update_bits(field->regmap, field->reg, | |
1359 | field->mask, val << field->shift); | |
1360 | } | |
1361 | EXPORT_SYMBOL_GPL(regmap_field_write); | |
1362 | ||
8eaeb219 LD |
1363 | /* |
1364 | * regmap_bulk_write(): Write multiple registers to the device | |
1365 | * | |
1366 | * @map: Register map to write to | |
1367 | * @reg: First register to be write from | |
1368 | * @val: Block of data to be written, in native register size for device | |
1369 | * @val_count: Number of registers to write | |
1370 | * | |
1371 | * This function is intended to be used for writing a large block of | |
31b35e9e | 1372 | * data to the device either in single transfer or multiple transfer. |
8eaeb219 LD |
1373 | * |
1374 | * A value of zero will be returned on success, a negative errno will | |
1375 | * be returned in error cases. | |
1376 | */ | |
1377 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1378 | size_t val_count) | |
1379 | { | |
1380 | int ret = 0, i; | |
1381 | size_t val_bytes = map->format.val_bytes; | |
1382 | void *wval; | |
1383 | ||
d2a5884a AS |
1384 | if (!map->bus) |
1385 | return -EINVAL; | |
8a819ff8 | 1386 | if (!map->format.parse_inplace) |
8eaeb219 | 1387 | return -EINVAL; |
f01ee60f SW |
1388 | if (reg % map->reg_stride) |
1389 | return -EINVAL; | |
8eaeb219 | 1390 | |
0d4529c5 | 1391 | map->lock(map->lock_arg); |
8eaeb219 LD |
1392 | |
1393 | /* No formatting is require if val_byte is 1 */ | |
1394 | if (val_bytes == 1) { | |
1395 | wval = (void *)val; | |
1396 | } else { | |
1397 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1398 | if (!wval) { | |
1399 | ret = -ENOMEM; | |
1400 | dev_err(map->dev, "Error in memory allocation\n"); | |
1401 | goto out; | |
1402 | } | |
1403 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1404 | map->format.parse_inplace(wval + i); |
8eaeb219 | 1405 | } |
2e33caf1 AJ |
1406 | /* |
1407 | * Some devices does not support bulk write, for | |
1408 | * them we have a series of single write operations. | |
1409 | */ | |
1410 | if (map->use_single_rw) { | |
1411 | for (i = 0; i < val_count; i++) { | |
1412 | ret = regmap_raw_write(map, | |
0d509f2b MB |
1413 | reg + (i * map->reg_stride), |
1414 | val + (i * val_bytes), | |
1415 | val_bytes); | |
2e33caf1 AJ |
1416 | if (ret != 0) |
1417 | return ret; | |
1418 | } | |
1419 | } else { | |
0d509f2b MB |
1420 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count, |
1421 | false); | |
2e33caf1 | 1422 | } |
8eaeb219 LD |
1423 | |
1424 | if (val_bytes != 1) | |
1425 | kfree(wval); | |
1426 | ||
1427 | out: | |
0d4529c5 | 1428 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1429 | return ret; |
1430 | } | |
1431 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1432 | ||
0d509f2b MB |
1433 | /** |
1434 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1435 | * asynchronously | |
1436 | * | |
1437 | * @map: Register map to write to | |
1438 | * @reg: Initial register to write to | |
1439 | * @val: Block of data to be written, laid out for direct transmission to the | |
1440 | * device. Must be valid until regmap_async_complete() is called. | |
1441 | * @val_len: Length of data pointed to by val. | |
1442 | * | |
1443 | * This function is intended to be used for things like firmware | |
1444 | * download where a large block of data needs to be transferred to the | |
1445 | * device. No formatting will be done on the data provided. | |
1446 | * | |
1447 | * If supported by the underlying bus the write will be scheduled | |
1448 | * asynchronously, helping maximise I/O speed on higher speed buses | |
1449 | * like SPI. regmap_async_complete() can be called to ensure that all | |
1450 | * asynchrnous writes have been completed. | |
1451 | * | |
1452 | * A value of zero will be returned on success, a negative errno will | |
1453 | * be returned in error cases. | |
1454 | */ | |
1455 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
1456 | const void *val, size_t val_len) | |
1457 | { | |
1458 | int ret; | |
1459 | ||
1460 | if (val_len % map->format.val_bytes) | |
1461 | return -EINVAL; | |
1462 | if (reg % map->reg_stride) | |
1463 | return -EINVAL; | |
1464 | ||
1465 | map->lock(map->lock_arg); | |
1466 | ||
1467 | ret = _regmap_raw_write(map, reg, val, val_len, true); | |
1468 | ||
1469 | map->unlock(map->lock_arg); | |
1470 | ||
1471 | return ret; | |
1472 | } | |
1473 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
1474 | ||
b83a313b MB |
1475 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1476 | unsigned int val_len) | |
1477 | { | |
98bc7dfd | 1478 | struct regmap_range_node *range; |
b83a313b MB |
1479 | u8 *u8 = map->work_buf; |
1480 | int ret; | |
1481 | ||
f1b5c5c3 | 1482 | WARN_ON(!map->bus); |
d2a5884a | 1483 | |
98bc7dfd MB |
1484 | range = _regmap_range_lookup(map, reg); |
1485 | if (range) { | |
1486 | ret = _regmap_select_page(map, ®, range, | |
1487 | val_len / map->format.val_bytes); | |
0ff3e62f | 1488 | if (ret != 0) |
98bc7dfd MB |
1489 | return ret; |
1490 | } | |
6863ca62 | 1491 | |
d939fb9a | 1492 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1493 | |
1494 | /* | |
6f306441 | 1495 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1496 | * register addresss; since it's always the high bits for all |
1497 | * current formats we can do this here rather than in | |
1498 | * formatting. This may break if we get interesting formats. | |
1499 | */ | |
6f306441 | 1500 | u8[0] |= map->read_flag_mask; |
b83a313b | 1501 | |
fb2736bb MB |
1502 | trace_regmap_hw_read_start(map->dev, reg, |
1503 | val_len / map->format.val_bytes); | |
1504 | ||
0135bbcc | 1505 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1506 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1507 | val, val_len); |
b83a313b | 1508 | |
fb2736bb MB |
1509 | trace_regmap_hw_read_done(map->dev, reg, |
1510 | val_len / map->format.val_bytes); | |
1511 | ||
1512 | return ret; | |
b83a313b MB |
1513 | } |
1514 | ||
ad278406 AS |
1515 | static int _regmap_bus_read(void *context, unsigned int reg, |
1516 | unsigned int *val) | |
1517 | { | |
1518 | int ret; | |
1519 | struct regmap *map = context; | |
1520 | ||
1521 | if (!map->format.parse_val) | |
1522 | return -EINVAL; | |
1523 | ||
1524 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1525 | if (ret == 0) | |
1526 | *val = map->format.parse_val(map->work_buf); | |
1527 | ||
1528 | return ret; | |
1529 | } | |
1530 | ||
b83a313b MB |
1531 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1532 | unsigned int *val) | |
1533 | { | |
1534 | int ret; | |
d2a5884a AS |
1535 | void *context = _regmap_map_get_context(map); |
1536 | ||
f1b5c5c3 | 1537 | WARN_ON(!map->reg_read); |
b83a313b | 1538 | |
5d1729e7 DP |
1539 | if (!map->cache_bypass) { |
1540 | ret = regcache_read(map, reg, val); | |
1541 | if (ret == 0) | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | if (map->cache_only) | |
1546 | return -EBUSY; | |
1547 | ||
d2a5884a | 1548 | ret = map->reg_read(context, reg, val); |
fb2736bb | 1549 | if (ret == 0) { |
1044c180 MB |
1550 | #ifdef LOG_DEVICE |
1551 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1552 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1553 | #endif | |
1554 | ||
fb2736bb | 1555 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1556 | |
ad278406 AS |
1557 | if (!map->cache_bypass) |
1558 | regcache_write(map, reg, *val); | |
1559 | } | |
f2985367 | 1560 | |
b83a313b MB |
1561 | return ret; |
1562 | } | |
1563 | ||
1564 | /** | |
1565 | * regmap_read(): Read a value from a single register | |
1566 | * | |
1567 | * @map: Register map to write to | |
1568 | * @reg: Register to be read from | |
1569 | * @val: Pointer to store read value | |
1570 | * | |
1571 | * A value of zero will be returned on success, a negative errno will | |
1572 | * be returned in error cases. | |
1573 | */ | |
1574 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1575 | { | |
1576 | int ret; | |
1577 | ||
f01ee60f SW |
1578 | if (reg % map->reg_stride) |
1579 | return -EINVAL; | |
1580 | ||
0d4529c5 | 1581 | map->lock(map->lock_arg); |
b83a313b MB |
1582 | |
1583 | ret = _regmap_read(map, reg, val); | |
1584 | ||
0d4529c5 | 1585 | map->unlock(map->lock_arg); |
b83a313b MB |
1586 | |
1587 | return ret; | |
1588 | } | |
1589 | EXPORT_SYMBOL_GPL(regmap_read); | |
1590 | ||
1591 | /** | |
1592 | * regmap_raw_read(): Read raw data from the device | |
1593 | * | |
1594 | * @map: Register map to write to | |
1595 | * @reg: First register to be read from | |
1596 | * @val: Pointer to store read value | |
1597 | * @val_len: Size of data to read | |
1598 | * | |
1599 | * A value of zero will be returned on success, a negative errno will | |
1600 | * be returned in error cases. | |
1601 | */ | |
1602 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1603 | size_t val_len) | |
1604 | { | |
b8fb5ab1 MB |
1605 | size_t val_bytes = map->format.val_bytes; |
1606 | size_t val_count = val_len / val_bytes; | |
1607 | unsigned int v; | |
1608 | int ret, i; | |
04e016ad | 1609 | |
d2a5884a AS |
1610 | if (!map->bus) |
1611 | return -EINVAL; | |
851960ba SW |
1612 | if (val_len % map->format.val_bytes) |
1613 | return -EINVAL; | |
f01ee60f SW |
1614 | if (reg % map->reg_stride) |
1615 | return -EINVAL; | |
851960ba | 1616 | |
0d4529c5 | 1617 | map->lock(map->lock_arg); |
b83a313b | 1618 | |
b8fb5ab1 MB |
1619 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1620 | map->cache_type == REGCACHE_NONE) { | |
1621 | /* Physical block read if there's no cache involved */ | |
1622 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1623 | ||
1624 | } else { | |
1625 | /* Otherwise go word by word for the cache; should be low | |
1626 | * cost as we expect to hit the cache. | |
1627 | */ | |
1628 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1629 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1630 | &v); | |
b8fb5ab1 MB |
1631 | if (ret != 0) |
1632 | goto out; | |
1633 | ||
d939fb9a | 1634 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1635 | } |
1636 | } | |
b83a313b | 1637 | |
b8fb5ab1 | 1638 | out: |
0d4529c5 | 1639 | map->unlock(map->lock_arg); |
b83a313b MB |
1640 | |
1641 | return ret; | |
1642 | } | |
1643 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1644 | ||
67252287 SK |
1645 | /** |
1646 | * regmap_field_read(): Read a value to a single register field | |
1647 | * | |
1648 | * @field: Register field to read from | |
1649 | * @val: Pointer to store read value | |
1650 | * | |
1651 | * A value of zero will be returned on success, a negative errno will | |
1652 | * be returned in error cases. | |
1653 | */ | |
1654 | int regmap_field_read(struct regmap_field *field, unsigned int *val) | |
1655 | { | |
1656 | int ret; | |
1657 | unsigned int reg_val; | |
1658 | ret = regmap_read(field->regmap, field->reg, ®_val); | |
1659 | if (ret != 0) | |
1660 | return ret; | |
1661 | ||
1662 | reg_val &= field->mask; | |
1663 | reg_val >>= field->shift; | |
1664 | *val = reg_val; | |
1665 | ||
1666 | return ret; | |
1667 | } | |
1668 | EXPORT_SYMBOL_GPL(regmap_field_read); | |
1669 | ||
b83a313b MB |
1670 | /** |
1671 | * regmap_bulk_read(): Read multiple registers from the device | |
1672 | * | |
1673 | * @map: Register map to write to | |
1674 | * @reg: First register to be read from | |
1675 | * @val: Pointer to store read value, in native register size for device | |
1676 | * @val_count: Number of registers to read | |
1677 | * | |
1678 | * A value of zero will be returned on success, a negative errno will | |
1679 | * be returned in error cases. | |
1680 | */ | |
1681 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1682 | size_t val_count) | |
1683 | { | |
1684 | int ret, i; | |
1685 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1686 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1687 | |
d2a5884a AS |
1688 | if (!map->bus) |
1689 | return -EINVAL; | |
8a819ff8 | 1690 | if (!map->format.parse_inplace) |
b83a313b | 1691 | return -EINVAL; |
f01ee60f SW |
1692 | if (reg % map->reg_stride) |
1693 | return -EINVAL; | |
b83a313b | 1694 | |
de2d808f | 1695 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1696 | /* |
1697 | * Some devices does not support bulk read, for | |
1698 | * them we have a series of single read operations. | |
1699 | */ | |
1700 | if (map->use_single_rw) { | |
1701 | for (i = 0; i < val_count; i++) { | |
1702 | ret = regmap_raw_read(map, | |
1703 | reg + (i * map->reg_stride), | |
1704 | val + (i * val_bytes), | |
1705 | val_bytes); | |
1706 | if (ret != 0) | |
1707 | return ret; | |
1708 | } | |
1709 | } else { | |
1710 | ret = regmap_raw_read(map, reg, val, | |
1711 | val_bytes * val_count); | |
1712 | if (ret != 0) | |
1713 | return ret; | |
1714 | } | |
de2d808f MB |
1715 | |
1716 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1717 | map->format.parse_inplace(val + i); |
de2d808f MB |
1718 | } else { |
1719 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1720 | unsigned int ival; |
f01ee60f | 1721 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1722 | &ival); |
de2d808f MB |
1723 | if (ret != 0) |
1724 | return ret; | |
6560ffd1 | 1725 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1726 | } |
1727 | } | |
b83a313b MB |
1728 | |
1729 | return 0; | |
1730 | } | |
1731 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1732 | ||
018690d3 MB |
1733 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1734 | unsigned int mask, unsigned int val, | |
1735 | bool *change) | |
b83a313b MB |
1736 | { |
1737 | int ret; | |
d91e8db2 | 1738 | unsigned int tmp, orig; |
b83a313b | 1739 | |
d91e8db2 | 1740 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1741 | if (ret != 0) |
fc3ebd78 | 1742 | return ret; |
b83a313b | 1743 | |
d91e8db2 | 1744 | tmp = orig & ~mask; |
b83a313b MB |
1745 | tmp |= val & mask; |
1746 | ||
018690d3 | 1747 | if (tmp != orig) { |
d91e8db2 | 1748 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1749 | *change = true; |
1750 | } else { | |
1751 | *change = false; | |
1752 | } | |
b83a313b | 1753 | |
b83a313b MB |
1754 | return ret; |
1755 | } | |
018690d3 MB |
1756 | |
1757 | /** | |
1758 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1759 | * | |
1760 | * @map: Register map to update | |
1761 | * @reg: Register to update | |
1762 | * @mask: Bitmask to change | |
1763 | * @val: New value for bitmask | |
1764 | * | |
1765 | * Returns zero for success, a negative number on error. | |
1766 | */ | |
1767 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1768 | unsigned int mask, unsigned int val) | |
1769 | { | |
1770 | bool change; | |
fc3ebd78 KG |
1771 | int ret; |
1772 | ||
0d4529c5 | 1773 | map->lock(map->lock_arg); |
fc3ebd78 | 1774 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1775 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1776 | |
1777 | return ret; | |
018690d3 | 1778 | } |
b83a313b | 1779 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1780 | |
018690d3 MB |
1781 | /** |
1782 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1783 | * register map and report if updated | |
1784 | * | |
1785 | * @map: Register map to update | |
1786 | * @reg: Register to update | |
1787 | * @mask: Bitmask to change | |
1788 | * @val: New value for bitmask | |
1789 | * @change: Boolean indicating if a write was done | |
1790 | * | |
1791 | * Returns zero for success, a negative number on error. | |
1792 | */ | |
1793 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1794 | unsigned int mask, unsigned int val, | |
1795 | bool *change) | |
1796 | { | |
fc3ebd78 KG |
1797 | int ret; |
1798 | ||
0d4529c5 | 1799 | map->lock(map->lock_arg); |
fc3ebd78 | 1800 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1801 | map->unlock(map->lock_arg); |
fc3ebd78 | 1802 | return ret; |
018690d3 MB |
1803 | } |
1804 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1805 | ||
0d509f2b MB |
1806 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
1807 | { | |
1808 | struct regmap *map = async->map; | |
1809 | bool wake; | |
1810 | ||
fe7d4ccd MB |
1811 | trace_regmap_async_io_complete(map->dev); |
1812 | ||
0d509f2b MB |
1813 | spin_lock(&map->async_lock); |
1814 | ||
1815 | list_del(&async->list); | |
1816 | wake = list_empty(&map->async_list); | |
1817 | ||
1818 | if (ret != 0) | |
1819 | map->async_ret = ret; | |
1820 | ||
1821 | spin_unlock(&map->async_lock); | |
1822 | ||
1823 | schedule_work(&async->cleanup); | |
1824 | ||
1825 | if (wake) | |
1826 | wake_up(&map->async_waitq); | |
1827 | } | |
f804fb56 | 1828 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
0d509f2b MB |
1829 | |
1830 | static int regmap_async_is_done(struct regmap *map) | |
1831 | { | |
1832 | unsigned long flags; | |
1833 | int ret; | |
1834 | ||
1835 | spin_lock_irqsave(&map->async_lock, flags); | |
1836 | ret = list_empty(&map->async_list); | |
1837 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1838 | ||
1839 | return ret; | |
1840 | } | |
1841 | ||
1842 | /** | |
1843 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
1844 | * | |
1845 | * @map: Map to operate on. | |
1846 | * | |
1847 | * Blocks until any pending asynchronous I/O has completed. Returns | |
1848 | * an error code for any failed I/O operations. | |
1849 | */ | |
1850 | int regmap_async_complete(struct regmap *map) | |
1851 | { | |
1852 | unsigned long flags; | |
1853 | int ret; | |
1854 | ||
1855 | /* Nothing to do with no async support */ | |
1856 | if (!map->bus->async_write) | |
1857 | return 0; | |
1858 | ||
fe7d4ccd MB |
1859 | trace_regmap_async_complete_start(map->dev); |
1860 | ||
0d509f2b MB |
1861 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
1862 | ||
1863 | spin_lock_irqsave(&map->async_lock, flags); | |
1864 | ret = map->async_ret; | |
1865 | map->async_ret = 0; | |
1866 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1867 | ||
fe7d4ccd MB |
1868 | trace_regmap_async_complete_done(map->dev); |
1869 | ||
0d509f2b MB |
1870 | return ret; |
1871 | } | |
f88948ef | 1872 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
0d509f2b | 1873 | |
22f0d90a MB |
1874 | /** |
1875 | * regmap_register_patch: Register and apply register updates to be applied | |
1876 | * on device initialistion | |
1877 | * | |
1878 | * @map: Register map to apply updates to. | |
1879 | * @regs: Values to update. | |
1880 | * @num_regs: Number of entries in regs. | |
1881 | * | |
1882 | * Register a set of register updates to be applied to the device | |
1883 | * whenever the device registers are synchronised with the cache and | |
1884 | * apply them immediately. Typically this is used to apply | |
1885 | * corrections to be applied to the device defaults on startup, such | |
1886 | * as the updates some vendors provide to undocumented registers. | |
1887 | */ | |
1888 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1889 | int num_regs) | |
1890 | { | |
aab13ebc | 1891 | struct reg_default *p; |
22f0d90a MB |
1892 | int i, ret; |
1893 | bool bypass; | |
1894 | ||
0d4529c5 | 1895 | map->lock(map->lock_arg); |
22f0d90a MB |
1896 | |
1897 | bypass = map->cache_bypass; | |
1898 | ||
1899 | map->cache_bypass = true; | |
1900 | ||
1901 | /* Write out first; it's useful to apply even if we fail later. */ | |
1902 | for (i = 0; i < num_regs; i++) { | |
1903 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1904 | if (ret != 0) { | |
1905 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1906 | regs[i].reg, regs[i].def, ret); | |
1907 | goto out; | |
1908 | } | |
1909 | } | |
1910 | ||
aab13ebc MB |
1911 | p = krealloc(map->patch, |
1912 | sizeof(struct reg_default) * (map->patch_regs + num_regs), | |
1913 | GFP_KERNEL); | |
1914 | if (p) { | |
1915 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); | |
1916 | map->patch = p; | |
1917 | map->patch_regs += num_regs; | |
22f0d90a MB |
1918 | } else { |
1919 | ret = -ENOMEM; | |
1920 | } | |
1921 | ||
1922 | out: | |
1923 | map->cache_bypass = bypass; | |
1924 | ||
0d4529c5 | 1925 | map->unlock(map->lock_arg); |
22f0d90a MB |
1926 | |
1927 | return ret; | |
1928 | } | |
1929 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1930 | ||
eae4b51b | 1931 | /* |
a6539c32 MB |
1932 | * regmap_get_val_bytes(): Report the size of a register value |
1933 | * | |
1934 | * Report the size of a register value, mainly intended to for use by | |
1935 | * generic infrastructure built on top of regmap. | |
1936 | */ | |
1937 | int regmap_get_val_bytes(struct regmap *map) | |
1938 | { | |
1939 | if (map->format.format_write) | |
1940 | return -EINVAL; | |
1941 | ||
1942 | return map->format.val_bytes; | |
1943 | } | |
1944 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1945 | ||
31244e39 MB |
1946 | static int __init regmap_initcall(void) |
1947 | { | |
1948 | regmap_debugfs_initcall(); | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | postcore_initcall(regmap_initcall); |