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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 | |
76aad392 DC |
45 | bool regmap_reg_in_ranges(unsigned int reg, |
46 | const struct regmap_range *ranges, | |
47 | unsigned int nranges) | |
48 | { | |
49 | const struct regmap_range *r; | |
50 | int i; | |
51 | ||
52 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
53 | if (regmap_reg_in_range(reg, r)) | |
54 | return true; | |
55 | return false; | |
56 | } | |
57 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
58 | ||
154881e5 MB |
59 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
60 | const struct regmap_access_table *table) | |
76aad392 DC |
61 | { |
62 | /* Check "no ranges" first */ | |
63 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
64 | return false; | |
65 | ||
66 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
67 | if (!table->n_yes_ranges) | |
68 | return true; | |
69 | ||
70 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
71 | table->n_yes_ranges); | |
72 | } | |
154881e5 | 73 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
76aad392 | 74 | |
8de2f081 MB |
75 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
76 | { | |
77 | if (map->max_register && reg > map->max_register) | |
78 | return false; | |
79 | ||
80 | if (map->writeable_reg) | |
81 | return map->writeable_reg(map->dev, reg); | |
82 | ||
76aad392 | 83 | if (map->wr_table) |
154881e5 | 84 | return regmap_check_range_table(map, reg, map->wr_table); |
76aad392 | 85 | |
8de2f081 MB |
86 | return true; |
87 | } | |
88 | ||
89 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
90 | { | |
91 | if (map->max_register && reg > map->max_register) | |
92 | return false; | |
93 | ||
4191f197 WS |
94 | if (map->format.format_write) |
95 | return false; | |
96 | ||
8de2f081 MB |
97 | if (map->readable_reg) |
98 | return map->readable_reg(map->dev, reg); | |
99 | ||
76aad392 | 100 | if (map->rd_table) |
154881e5 | 101 | return regmap_check_range_table(map, reg, map->rd_table); |
76aad392 | 102 | |
8de2f081 MB |
103 | return true; |
104 | } | |
105 | ||
106 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
107 | { | |
4191f197 | 108 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
109 | return false; |
110 | ||
111 | if (map->volatile_reg) | |
112 | return map->volatile_reg(map->dev, reg); | |
113 | ||
76aad392 | 114 | if (map->volatile_table) |
154881e5 | 115 | return regmap_check_range_table(map, reg, map->volatile_table); |
76aad392 | 116 | |
b92be6fe MB |
117 | if (map->cache_ops) |
118 | return false; | |
119 | else | |
120 | return true; | |
8de2f081 MB |
121 | } |
122 | ||
123 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
124 | { | |
4191f197 | 125 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
126 | return false; |
127 | ||
128 | if (map->precious_reg) | |
129 | return map->precious_reg(map->dev, reg); | |
130 | ||
76aad392 | 131 | if (map->precious_table) |
154881e5 | 132 | return regmap_check_range_table(map, reg, map->precious_table); |
76aad392 | 133 | |
8de2f081 MB |
134 | return false; |
135 | } | |
136 | ||
82cd9965 | 137 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 138 | size_t num) |
82cd9965 LPC |
139 | { |
140 | unsigned int i; | |
141 | ||
142 | for (i = 0; i < num; i++) | |
143 | if (!regmap_volatile(map, reg + i)) | |
144 | return false; | |
145 | ||
146 | return true; | |
147 | } | |
148 | ||
9aa50750 WS |
149 | static void regmap_format_2_6_write(struct regmap *map, |
150 | unsigned int reg, unsigned int val) | |
151 | { | |
152 | u8 *out = map->work_buf; | |
153 | ||
154 | *out = (reg << 6) | val; | |
155 | } | |
156 | ||
b83a313b MB |
157 | static void regmap_format_4_12_write(struct regmap *map, |
158 | unsigned int reg, unsigned int val) | |
159 | { | |
160 | __be16 *out = map->work_buf; | |
161 | *out = cpu_to_be16((reg << 12) | val); | |
162 | } | |
163 | ||
164 | static void regmap_format_7_9_write(struct regmap *map, | |
165 | unsigned int reg, unsigned int val) | |
166 | { | |
167 | __be16 *out = map->work_buf; | |
168 | *out = cpu_to_be16((reg << 9) | val); | |
169 | } | |
170 | ||
7e5ec63e LPC |
171 | static void regmap_format_10_14_write(struct regmap *map, |
172 | unsigned int reg, unsigned int val) | |
173 | { | |
174 | u8 *out = map->work_buf; | |
175 | ||
176 | out[2] = val; | |
177 | out[1] = (val >> 8) | (reg << 6); | |
178 | out[0] = reg >> 2; | |
179 | } | |
180 | ||
d939fb9a | 181 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
182 | { |
183 | u8 *b = buf; | |
184 | ||
d939fb9a | 185 | b[0] = val << shift; |
b83a313b MB |
186 | } |
187 | ||
141eba2e | 188 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
189 | { |
190 | __be16 *b = buf; | |
191 | ||
d939fb9a | 192 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
193 | } |
194 | ||
141eba2e SW |
195 | static void regmap_format_16_native(void *buf, unsigned int val, |
196 | unsigned int shift) | |
197 | { | |
198 | *(u16 *)buf = val << shift; | |
199 | } | |
200 | ||
d939fb9a | 201 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
202 | { |
203 | u8 *b = buf; | |
204 | ||
d939fb9a MR |
205 | val <<= shift; |
206 | ||
ea279fc5 MR |
207 | b[0] = val >> 16; |
208 | b[1] = val >> 8; | |
209 | b[2] = val; | |
210 | } | |
211 | ||
141eba2e | 212 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
213 | { |
214 | __be32 *b = buf; | |
215 | ||
d939fb9a | 216 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
217 | } |
218 | ||
141eba2e SW |
219 | static void regmap_format_32_native(void *buf, unsigned int val, |
220 | unsigned int shift) | |
221 | { | |
222 | *(u32 *)buf = val << shift; | |
223 | } | |
224 | ||
8a819ff8 | 225 | static void regmap_parse_inplace_noop(void *buf) |
b83a313b | 226 | { |
8a819ff8 MB |
227 | } |
228 | ||
229 | static unsigned int regmap_parse_8(const void *buf) | |
230 | { | |
231 | const u8 *b = buf; | |
b83a313b MB |
232 | |
233 | return b[0]; | |
234 | } | |
235 | ||
8a819ff8 MB |
236 | static unsigned int regmap_parse_16_be(const void *buf) |
237 | { | |
238 | const __be16 *b = buf; | |
239 | ||
240 | return be16_to_cpu(b[0]); | |
241 | } | |
242 | ||
243 | static void regmap_parse_16_be_inplace(void *buf) | |
b83a313b MB |
244 | { |
245 | __be16 *b = buf; | |
246 | ||
247 | b[0] = be16_to_cpu(b[0]); | |
b83a313b MB |
248 | } |
249 | ||
8a819ff8 | 250 | static unsigned int regmap_parse_16_native(const void *buf) |
141eba2e SW |
251 | { |
252 | return *(u16 *)buf; | |
253 | } | |
254 | ||
8a819ff8 | 255 | static unsigned int regmap_parse_24(const void *buf) |
ea279fc5 | 256 | { |
8a819ff8 | 257 | const u8 *b = buf; |
ea279fc5 MR |
258 | unsigned int ret = b[2]; |
259 | ret |= ((unsigned int)b[1]) << 8; | |
260 | ret |= ((unsigned int)b[0]) << 16; | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
8a819ff8 MB |
265 | static unsigned int regmap_parse_32_be(const void *buf) |
266 | { | |
267 | const __be32 *b = buf; | |
268 | ||
269 | return be32_to_cpu(b[0]); | |
270 | } | |
271 | ||
272 | static void regmap_parse_32_be_inplace(void *buf) | |
7d5e525b MB |
273 | { |
274 | __be32 *b = buf; | |
275 | ||
276 | b[0] = be32_to_cpu(b[0]); | |
7d5e525b MB |
277 | } |
278 | ||
8a819ff8 | 279 | static unsigned int regmap_parse_32_native(const void *buf) |
141eba2e SW |
280 | { |
281 | return *(u32 *)buf; | |
282 | } | |
283 | ||
0d4529c5 | 284 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 285 | { |
0d4529c5 | 286 | struct regmap *map = __map; |
bacdbe07 SW |
287 | mutex_lock(&map->mutex); |
288 | } | |
289 | ||
0d4529c5 | 290 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 291 | { |
0d4529c5 | 292 | struct regmap *map = __map; |
bacdbe07 SW |
293 | mutex_unlock(&map->mutex); |
294 | } | |
295 | ||
0d4529c5 | 296 | static void regmap_lock_spinlock(void *__map) |
b4519c71 | 297 | __acquires(&map->spinlock) |
bacdbe07 | 298 | { |
0d4529c5 | 299 | struct regmap *map = __map; |
92ab1aab LPC |
300 | unsigned long flags; |
301 | ||
302 | spin_lock_irqsave(&map->spinlock, flags); | |
303 | map->spinlock_flags = flags; | |
bacdbe07 SW |
304 | } |
305 | ||
0d4529c5 | 306 | static void regmap_unlock_spinlock(void *__map) |
b4519c71 | 307 | __releases(&map->spinlock) |
bacdbe07 | 308 | { |
0d4529c5 | 309 | struct regmap *map = __map; |
92ab1aab | 310 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
bacdbe07 SW |
311 | } |
312 | ||
72b39f6f MB |
313 | static void dev_get_regmap_release(struct device *dev, void *res) |
314 | { | |
315 | /* | |
316 | * We don't actually have anything to do here; the goal here | |
317 | * is not to manage the regmap but to provide a simple way to | |
318 | * get the regmap back given a struct device. | |
319 | */ | |
320 | } | |
321 | ||
6863ca62 KG |
322 | static bool _regmap_range_add(struct regmap *map, |
323 | struct regmap_range_node *data) | |
324 | { | |
325 | struct rb_root *root = &map->range_tree; | |
326 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
327 | ||
328 | while (*new) { | |
329 | struct regmap_range_node *this = | |
330 | container_of(*new, struct regmap_range_node, node); | |
331 | ||
332 | parent = *new; | |
333 | if (data->range_max < this->range_min) | |
334 | new = &((*new)->rb_left); | |
335 | else if (data->range_min > this->range_max) | |
336 | new = &((*new)->rb_right); | |
337 | else | |
338 | return false; | |
339 | } | |
340 | ||
341 | rb_link_node(&data->node, parent, new); | |
342 | rb_insert_color(&data->node, root); | |
343 | ||
344 | return true; | |
345 | } | |
346 | ||
347 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
348 | unsigned int reg) | |
349 | { | |
350 | struct rb_node *node = map->range_tree.rb_node; | |
351 | ||
352 | while (node) { | |
353 | struct regmap_range_node *this = | |
354 | container_of(node, struct regmap_range_node, node); | |
355 | ||
356 | if (reg < this->range_min) | |
357 | node = node->rb_left; | |
358 | else if (reg > this->range_max) | |
359 | node = node->rb_right; | |
360 | else | |
361 | return this; | |
362 | } | |
363 | ||
364 | return NULL; | |
365 | } | |
366 | ||
367 | static void regmap_range_exit(struct regmap *map) | |
368 | { | |
369 | struct rb_node *next; | |
370 | struct regmap_range_node *range_node; | |
371 | ||
372 | next = rb_first(&map->range_tree); | |
373 | while (next) { | |
374 | range_node = rb_entry(next, struct regmap_range_node, node); | |
375 | next = rb_next(&range_node->node); | |
376 | rb_erase(&range_node->node, &map->range_tree); | |
377 | kfree(range_node); | |
378 | } | |
379 | ||
380 | kfree(map->selector_work_buf); | |
381 | } | |
382 | ||
b83a313b MB |
383 | /** |
384 | * regmap_init(): Initialise register map | |
385 | * | |
386 | * @dev: Device that will be interacted with | |
387 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 388 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
389 | * @config: Configuration for register map |
390 | * | |
391 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
392 | * a struct regmap. This function should generally not be called | |
393 | * directly, it should be called by bus-specific init functions. | |
394 | */ | |
395 | struct regmap *regmap_init(struct device *dev, | |
396 | const struct regmap_bus *bus, | |
0135bbcc | 397 | void *bus_context, |
b83a313b MB |
398 | const struct regmap_config *config) |
399 | { | |
72b39f6f | 400 | struct regmap *map, **m; |
b83a313b | 401 | int ret = -EINVAL; |
141eba2e | 402 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 403 | int i, j; |
b83a313b | 404 | |
d2a5884a | 405 | if (!config) |
abbb18fb | 406 | goto err; |
b83a313b MB |
407 | |
408 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
409 | if (map == NULL) { | |
410 | ret = -ENOMEM; | |
411 | goto err; | |
412 | } | |
413 | ||
0d4529c5 DC |
414 | if (config->lock && config->unlock) { |
415 | map->lock = config->lock; | |
416 | map->unlock = config->unlock; | |
417 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 418 | } else { |
d2a5884a AS |
419 | if ((bus && bus->fast_io) || |
420 | config->fast_io) { | |
0d4529c5 DC |
421 | spin_lock_init(&map->spinlock); |
422 | map->lock = regmap_lock_spinlock; | |
423 | map->unlock = regmap_unlock_spinlock; | |
424 | } else { | |
425 | mutex_init(&map->mutex); | |
426 | map->lock = regmap_lock_mutex; | |
427 | map->unlock = regmap_unlock_mutex; | |
428 | } | |
429 | map->lock_arg = map; | |
bacdbe07 | 430 | } |
c212accc | 431 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 432 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 433 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
434 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
435 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 436 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
437 | if (config->reg_stride) |
438 | map->reg_stride = config->reg_stride; | |
439 | else | |
440 | map->reg_stride = 1; | |
2e33caf1 | 441 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
442 | map->dev = dev; |
443 | map->bus = bus; | |
0135bbcc | 444 | map->bus_context = bus_context; |
2e2ae66d | 445 | map->max_register = config->max_register; |
76aad392 DC |
446 | map->wr_table = config->wr_table; |
447 | map->rd_table = config->rd_table; | |
448 | map->volatile_table = config->volatile_table; | |
449 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
450 | map->writeable_reg = config->writeable_reg; |
451 | map->readable_reg = config->readable_reg; | |
452 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 453 | map->precious_reg = config->precious_reg; |
5d1729e7 | 454 | map->cache_type = config->cache_type; |
72b39f6f | 455 | map->name = config->name; |
b83a313b | 456 | |
0d509f2b MB |
457 | spin_lock_init(&map->async_lock); |
458 | INIT_LIST_HEAD(&map->async_list); | |
7e09a979 | 459 | INIT_LIST_HEAD(&map->async_free); |
0d509f2b MB |
460 | init_waitqueue_head(&map->async_waitq); |
461 | ||
6f306441 LPC |
462 | if (config->read_flag_mask || config->write_flag_mask) { |
463 | map->read_flag_mask = config->read_flag_mask; | |
464 | map->write_flag_mask = config->write_flag_mask; | |
d2a5884a | 465 | } else if (bus) { |
6f306441 LPC |
466 | map->read_flag_mask = bus->read_flag_mask; |
467 | } | |
468 | ||
d2a5884a AS |
469 | if (!bus) { |
470 | map->reg_read = config->reg_read; | |
471 | map->reg_write = config->reg_write; | |
472 | ||
473 | map->defer_caching = false; | |
474 | goto skip_format_initialization; | |
475 | } else { | |
476 | map->reg_read = _regmap_bus_read; | |
477 | } | |
ad278406 | 478 | |
141eba2e SW |
479 | reg_endian = config->reg_format_endian; |
480 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
481 | reg_endian = bus->reg_format_endian_default; | |
482 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
483 | reg_endian = REGMAP_ENDIAN_BIG; | |
484 | ||
485 | val_endian = config->val_format_endian; | |
486 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
487 | val_endian = bus->val_format_endian_default; | |
488 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
489 | val_endian = REGMAP_ENDIAN_BIG; | |
490 | ||
d939fb9a | 491 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
492 | case 2: |
493 | switch (config->val_bits) { | |
494 | case 6: | |
495 | map->format.format_write = regmap_format_2_6_write; | |
496 | break; | |
497 | default: | |
498 | goto err_map; | |
499 | } | |
500 | break; | |
501 | ||
b83a313b MB |
502 | case 4: |
503 | switch (config->val_bits) { | |
504 | case 12: | |
505 | map->format.format_write = regmap_format_4_12_write; | |
506 | break; | |
507 | default: | |
508 | goto err_map; | |
509 | } | |
510 | break; | |
511 | ||
512 | case 7: | |
513 | switch (config->val_bits) { | |
514 | case 9: | |
515 | map->format.format_write = regmap_format_7_9_write; | |
516 | break; | |
517 | default: | |
518 | goto err_map; | |
519 | } | |
520 | break; | |
521 | ||
7e5ec63e LPC |
522 | case 10: |
523 | switch (config->val_bits) { | |
524 | case 14: | |
525 | map->format.format_write = regmap_format_10_14_write; | |
526 | break; | |
527 | default: | |
528 | goto err_map; | |
529 | } | |
530 | break; | |
531 | ||
b83a313b MB |
532 | case 8: |
533 | map->format.format_reg = regmap_format_8; | |
534 | break; | |
535 | ||
536 | case 16: | |
141eba2e SW |
537 | switch (reg_endian) { |
538 | case REGMAP_ENDIAN_BIG: | |
539 | map->format.format_reg = regmap_format_16_be; | |
540 | break; | |
541 | case REGMAP_ENDIAN_NATIVE: | |
542 | map->format.format_reg = regmap_format_16_native; | |
543 | break; | |
544 | default: | |
545 | goto err_map; | |
546 | } | |
b83a313b MB |
547 | break; |
548 | ||
237019e7 LPC |
549 | case 24: |
550 | if (reg_endian != REGMAP_ENDIAN_BIG) | |
551 | goto err_map; | |
552 | map->format.format_reg = regmap_format_24; | |
553 | break; | |
554 | ||
7d5e525b | 555 | case 32: |
141eba2e SW |
556 | switch (reg_endian) { |
557 | case REGMAP_ENDIAN_BIG: | |
558 | map->format.format_reg = regmap_format_32_be; | |
559 | break; | |
560 | case REGMAP_ENDIAN_NATIVE: | |
561 | map->format.format_reg = regmap_format_32_native; | |
562 | break; | |
563 | default: | |
564 | goto err_map; | |
565 | } | |
7d5e525b MB |
566 | break; |
567 | ||
b83a313b MB |
568 | default: |
569 | goto err_map; | |
570 | } | |
571 | ||
8a819ff8 MB |
572 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
573 | map->format.parse_inplace = regmap_parse_inplace_noop; | |
574 | ||
b83a313b MB |
575 | switch (config->val_bits) { |
576 | case 8: | |
577 | map->format.format_val = regmap_format_8; | |
578 | map->format.parse_val = regmap_parse_8; | |
8a819ff8 | 579 | map->format.parse_inplace = regmap_parse_inplace_noop; |
b83a313b MB |
580 | break; |
581 | case 16: | |
141eba2e SW |
582 | switch (val_endian) { |
583 | case REGMAP_ENDIAN_BIG: | |
584 | map->format.format_val = regmap_format_16_be; | |
585 | map->format.parse_val = regmap_parse_16_be; | |
8a819ff8 | 586 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
141eba2e SW |
587 | break; |
588 | case REGMAP_ENDIAN_NATIVE: | |
589 | map->format.format_val = regmap_format_16_native; | |
590 | map->format.parse_val = regmap_parse_16_native; | |
591 | break; | |
592 | default: | |
593 | goto err_map; | |
594 | } | |
b83a313b | 595 | break; |
ea279fc5 | 596 | case 24: |
141eba2e SW |
597 | if (val_endian != REGMAP_ENDIAN_BIG) |
598 | goto err_map; | |
ea279fc5 MR |
599 | map->format.format_val = regmap_format_24; |
600 | map->format.parse_val = regmap_parse_24; | |
601 | break; | |
7d5e525b | 602 | case 32: |
141eba2e SW |
603 | switch (val_endian) { |
604 | case REGMAP_ENDIAN_BIG: | |
605 | map->format.format_val = regmap_format_32_be; | |
606 | map->format.parse_val = regmap_parse_32_be; | |
8a819ff8 | 607 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
141eba2e SW |
608 | break; |
609 | case REGMAP_ENDIAN_NATIVE: | |
610 | map->format.format_val = regmap_format_32_native; | |
611 | map->format.parse_val = regmap_parse_32_native; | |
612 | break; | |
613 | default: | |
614 | goto err_map; | |
615 | } | |
7d5e525b | 616 | break; |
b83a313b MB |
617 | } |
618 | ||
141eba2e SW |
619 | if (map->format.format_write) { |
620 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
621 | (val_endian != REGMAP_ENDIAN_BIG)) | |
622 | goto err_map; | |
7a647614 | 623 | map->use_single_rw = true; |
141eba2e | 624 | } |
7a647614 | 625 | |
b83a313b MB |
626 | if (!map->format.format_write && |
627 | !(map->format.format_reg && map->format.format_val)) | |
628 | goto err_map; | |
629 | ||
82159ba8 | 630 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
631 | if (map->work_buf == NULL) { |
632 | ret = -ENOMEM; | |
5204f5e3 | 633 | goto err_map; |
b83a313b MB |
634 | } |
635 | ||
d2a5884a AS |
636 | if (map->format.format_write) { |
637 | map->defer_caching = false; | |
07c320dc | 638 | map->reg_write = _regmap_bus_formatted_write; |
d2a5884a AS |
639 | } else if (map->format.format_val) { |
640 | map->defer_caching = true; | |
07c320dc | 641 | map->reg_write = _regmap_bus_raw_write; |
d2a5884a AS |
642 | } |
643 | ||
644 | skip_format_initialization: | |
07c320dc | 645 | |
6863ca62 | 646 | map->range_tree = RB_ROOT; |
e3549cd0 | 647 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
648 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
649 | struct regmap_range_node *new; | |
650 | ||
651 | /* Sanity check */ | |
061adc06 MB |
652 | if (range_cfg->range_max < range_cfg->range_min) { |
653 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
654 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 655 | goto err_range; |
061adc06 MB |
656 | } |
657 | ||
658 | if (range_cfg->range_max > map->max_register) { | |
659 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
660 | range_cfg->range_max, map->max_register); | |
661 | goto err_range; | |
662 | } | |
663 | ||
664 | if (range_cfg->selector_reg > map->max_register) { | |
665 | dev_err(map->dev, | |
666 | "Invalid range %d: selector out of map\n", i); | |
667 | goto err_range; | |
668 | } | |
669 | ||
670 | if (range_cfg->window_len == 0) { | |
671 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
672 | i); | |
673 | goto err_range; | |
674 | } | |
6863ca62 KG |
675 | |
676 | /* Make sure, that this register range has no selector | |
677 | or data window within its boundary */ | |
e3549cd0 | 678 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
679 | unsigned sel_reg = config->ranges[j].selector_reg; |
680 | unsigned win_min = config->ranges[j].window_start; | |
681 | unsigned win_max = win_min + | |
682 | config->ranges[j].window_len - 1; | |
683 | ||
f161d220 PZ |
684 | /* Allow data window inside its own virtual range */ |
685 | if (j == i) | |
686 | continue; | |
687 | ||
6863ca62 KG |
688 | if (range_cfg->range_min <= sel_reg && |
689 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
690 | dev_err(map->dev, |
691 | "Range %d: selector for %d in window\n", | |
692 | i, j); | |
6863ca62 KG |
693 | goto err_range; |
694 | } | |
695 | ||
696 | if (!(win_max < range_cfg->range_min || | |
697 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
698 | dev_err(map->dev, |
699 | "Range %d: window for %d in window\n", | |
700 | i, j); | |
6863ca62 KG |
701 | goto err_range; |
702 | } | |
703 | } | |
704 | ||
705 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
706 | if (new == NULL) { | |
707 | ret = -ENOMEM; | |
708 | goto err_range; | |
709 | } | |
710 | ||
4b020b3f | 711 | new->map = map; |
d058bb49 | 712 | new->name = range_cfg->name; |
6863ca62 KG |
713 | new->range_min = range_cfg->range_min; |
714 | new->range_max = range_cfg->range_max; | |
715 | new->selector_reg = range_cfg->selector_reg; | |
716 | new->selector_mask = range_cfg->selector_mask; | |
717 | new->selector_shift = range_cfg->selector_shift; | |
718 | new->window_start = range_cfg->window_start; | |
719 | new->window_len = range_cfg->window_len; | |
720 | ||
721 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 722 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
723 | kfree(new); |
724 | goto err_range; | |
725 | } | |
726 | ||
727 | if (map->selector_work_buf == NULL) { | |
728 | map->selector_work_buf = | |
729 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
730 | if (map->selector_work_buf == NULL) { | |
731 | ret = -ENOMEM; | |
732 | goto err_range; | |
733 | } | |
734 | } | |
735 | } | |
052d2cd1 | 736 | |
c6432ea9 DP |
737 | regmap_debugfs_init(map, config->name); |
738 | ||
e5e3b8ab | 739 | ret = regcache_init(map, config); |
0ff3e62f | 740 | if (ret != 0) |
6863ca62 KG |
741 | goto err_range; |
742 | ||
72b39f6f MB |
743 | /* Add a devres resource for dev_get_regmap() */ |
744 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
745 | if (!m) { | |
746 | ret = -ENOMEM; | |
6863ca62 | 747 | goto err_debugfs; |
72b39f6f MB |
748 | } |
749 | *m = map; | |
750 | devres_add(dev, m); | |
751 | ||
b83a313b MB |
752 | return map; |
753 | ||
bfaa25f3 SW |
754 | err_debugfs: |
755 | regmap_debugfs_exit(map); | |
72b39f6f | 756 | regcache_exit(map); |
6863ca62 KG |
757 | err_range: |
758 | regmap_range_exit(map); | |
58072cbf | 759 | kfree(map->work_buf); |
b83a313b MB |
760 | err_map: |
761 | kfree(map); | |
762 | err: | |
763 | return ERR_PTR(ret); | |
764 | } | |
765 | EXPORT_SYMBOL_GPL(regmap_init); | |
766 | ||
c0eb4676 MB |
767 | static void devm_regmap_release(struct device *dev, void *res) |
768 | { | |
769 | regmap_exit(*(struct regmap **)res); | |
770 | } | |
771 | ||
772 | /** | |
773 | * devm_regmap_init(): Initialise managed register map | |
774 | * | |
775 | * @dev: Device that will be interacted with | |
776 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 777 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
778 | * @config: Configuration for register map |
779 | * | |
780 | * The return value will be an ERR_PTR() on error or a valid pointer | |
781 | * to a struct regmap. This function should generally not be called | |
782 | * directly, it should be called by bus-specific init functions. The | |
783 | * map will be automatically freed by the device management code. | |
784 | */ | |
785 | struct regmap *devm_regmap_init(struct device *dev, | |
786 | const struct regmap_bus *bus, | |
0135bbcc | 787 | void *bus_context, |
c0eb4676 MB |
788 | const struct regmap_config *config) |
789 | { | |
790 | struct regmap **ptr, *regmap; | |
791 | ||
792 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
793 | if (!ptr) | |
794 | return ERR_PTR(-ENOMEM); | |
795 | ||
0135bbcc | 796 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
797 | if (!IS_ERR(regmap)) { |
798 | *ptr = regmap; | |
799 | devres_add(dev, ptr); | |
800 | } else { | |
801 | devres_free(ptr); | |
802 | } | |
803 | ||
804 | return regmap; | |
805 | } | |
806 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
807 | ||
67252287 SK |
808 | static void regmap_field_init(struct regmap_field *rm_field, |
809 | struct regmap *regmap, struct reg_field reg_field) | |
810 | { | |
811 | int field_bits = reg_field.msb - reg_field.lsb + 1; | |
812 | rm_field->regmap = regmap; | |
813 | rm_field->reg = reg_field.reg; | |
814 | rm_field->shift = reg_field.lsb; | |
815 | rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); | |
816 | } | |
817 | ||
818 | /** | |
819 | * devm_regmap_field_alloc(): Allocate and initialise a register field | |
820 | * in a register map. | |
821 | * | |
822 | * @dev: Device that will be interacted with | |
823 | * @regmap: regmap bank in which this register field is located. | |
824 | * @reg_field: Register field with in the bank. | |
825 | * | |
826 | * The return value will be an ERR_PTR() on error or a valid pointer | |
827 | * to a struct regmap_field. The regmap_field will be automatically freed | |
828 | * by the device management code. | |
829 | */ | |
830 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, | |
831 | struct regmap *regmap, struct reg_field reg_field) | |
832 | { | |
833 | struct regmap_field *rm_field = devm_kzalloc(dev, | |
834 | sizeof(*rm_field), GFP_KERNEL); | |
835 | if (!rm_field) | |
836 | return ERR_PTR(-ENOMEM); | |
837 | ||
838 | regmap_field_init(rm_field, regmap, reg_field); | |
839 | ||
840 | return rm_field; | |
841 | ||
842 | } | |
843 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); | |
844 | ||
845 | /** | |
846 | * devm_regmap_field_free(): Free register field allocated using | |
847 | * devm_regmap_field_alloc. Usally drivers need not call this function, | |
848 | * as the memory allocated via devm will be freed as per device-driver | |
849 | * life-cyle. | |
850 | * | |
851 | * @dev: Device that will be interacted with | |
852 | * @field: regmap field which should be freed. | |
853 | */ | |
854 | void devm_regmap_field_free(struct device *dev, | |
855 | struct regmap_field *field) | |
856 | { | |
857 | devm_kfree(dev, field); | |
858 | } | |
859 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); | |
860 | ||
861 | /** | |
862 | * regmap_field_alloc(): Allocate and initialise a register field | |
863 | * in a register map. | |
864 | * | |
865 | * @regmap: regmap bank in which this register field is located. | |
866 | * @reg_field: Register field with in the bank. | |
867 | * | |
868 | * The return value will be an ERR_PTR() on error or a valid pointer | |
869 | * to a struct regmap_field. The regmap_field should be freed by the | |
870 | * user once its finished working with it using regmap_field_free(). | |
871 | */ | |
872 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, | |
873 | struct reg_field reg_field) | |
874 | { | |
875 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); | |
876 | ||
877 | if (!rm_field) | |
878 | return ERR_PTR(-ENOMEM); | |
879 | ||
880 | regmap_field_init(rm_field, regmap, reg_field); | |
881 | ||
882 | return rm_field; | |
883 | } | |
884 | EXPORT_SYMBOL_GPL(regmap_field_alloc); | |
885 | ||
886 | /** | |
887 | * regmap_field_free(): Free register field allocated using regmap_field_alloc | |
888 | * | |
889 | * @field: regmap field which should be freed. | |
890 | */ | |
891 | void regmap_field_free(struct regmap_field *field) | |
892 | { | |
893 | kfree(field); | |
894 | } | |
895 | EXPORT_SYMBOL_GPL(regmap_field_free); | |
896 | ||
bf315173 MB |
897 | /** |
898 | * regmap_reinit_cache(): Reinitialise the current register cache | |
899 | * | |
900 | * @map: Register map to operate on. | |
901 | * @config: New configuration. Only the cache data will be used. | |
902 | * | |
903 | * Discard any existing register cache for the map and initialize a | |
904 | * new cache. This can be used to restore the cache to defaults or to | |
905 | * update the cache configuration to reflect runtime discovery of the | |
906 | * hardware. | |
4d879514 DP |
907 | * |
908 | * No explicit locking is done here, the user needs to ensure that | |
909 | * this function will not race with other calls to regmap. | |
bf315173 MB |
910 | */ |
911 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
912 | { | |
bf315173 | 913 | regcache_exit(map); |
a24f64a6 | 914 | regmap_debugfs_exit(map); |
bf315173 MB |
915 | |
916 | map->max_register = config->max_register; | |
917 | map->writeable_reg = config->writeable_reg; | |
918 | map->readable_reg = config->readable_reg; | |
919 | map->volatile_reg = config->volatile_reg; | |
920 | map->precious_reg = config->precious_reg; | |
921 | map->cache_type = config->cache_type; | |
922 | ||
d3c242e1 | 923 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 924 | |
421e8d2d MB |
925 | map->cache_bypass = false; |
926 | map->cache_only = false; | |
927 | ||
4d879514 | 928 | return regcache_init(map, config); |
bf315173 | 929 | } |
752a6a5f | 930 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 931 | |
b83a313b MB |
932 | /** |
933 | * regmap_exit(): Free a previously allocated register map | |
934 | */ | |
935 | void regmap_exit(struct regmap *map) | |
936 | { | |
7e09a979 MB |
937 | struct regmap_async *async; |
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); |
7e09a979 MB |
945 | while (!list_empty(&map->async_free)) { |
946 | async = list_first_entry_or_null(&map->async_free, | |
947 | struct regmap_async, | |
948 | list); | |
949 | list_del(&async->list); | |
950 | kfree(async->work_buf); | |
951 | kfree(async); | |
952 | } | |
b83a313b MB |
953 | kfree(map); |
954 | } | |
955 | EXPORT_SYMBOL_GPL(regmap_exit); | |
956 | ||
72b39f6f MB |
957 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
958 | { | |
959 | struct regmap **r = res; | |
960 | if (!r || !*r) { | |
961 | WARN_ON(!r || !*r); | |
962 | return 0; | |
963 | } | |
964 | ||
965 | /* If the user didn't specify a name match any */ | |
966 | if (data) | |
967 | return (*r)->name == data; | |
968 | else | |
969 | return 1; | |
970 | } | |
971 | ||
972 | /** | |
973 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
974 | * | |
975 | * @dev: Device to retrieve the map for | |
976 | * @name: Optional name for the register map, usually NULL. | |
977 | * | |
978 | * Returns the regmap for the device if one is present, or NULL. If | |
979 | * name is specified then it must match the name specified when | |
980 | * registering the device, if it is NULL then the first regmap found | |
981 | * will be used. Devices with multiple register maps are very rare, | |
982 | * generic code should normally not need to specify a name. | |
983 | */ | |
984 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
985 | { | |
986 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
987 | dev_get_regmap_match, (void *)name); | |
988 | ||
989 | if (!r) | |
990 | return NULL; | |
991 | return *r; | |
992 | } | |
993 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
994 | ||
6863ca62 | 995 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 996 | struct regmap_range_node *range, |
6863ca62 KG |
997 | unsigned int val_num) |
998 | { | |
6863ca62 KG |
999 | void *orig_work_buf; |
1000 | unsigned int win_offset; | |
1001 | unsigned int win_page; | |
1002 | bool page_chg; | |
1003 | int ret; | |
1004 | ||
98bc7dfd MB |
1005 | win_offset = (*reg - range->range_min) % range->window_len; |
1006 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 1007 | |
98bc7dfd MB |
1008 | if (val_num > 1) { |
1009 | /* Bulk write shouldn't cross range boundary */ | |
1010 | if (*reg + val_num - 1 > range->range_max) | |
1011 | return -EINVAL; | |
6863ca62 | 1012 | |
98bc7dfd MB |
1013 | /* ... or single page boundary */ |
1014 | if (val_num > range->window_len - win_offset) | |
1015 | return -EINVAL; | |
1016 | } | |
6863ca62 | 1017 | |
98bc7dfd MB |
1018 | /* It is possible to have selector register inside data window. |
1019 | In that case, selector register is located on every page and | |
1020 | it needs no page switching, when accessed alone. */ | |
1021 | if (val_num > 1 || | |
1022 | range->window_start + win_offset != range->selector_reg) { | |
1023 | /* Use separate work_buf during page switching */ | |
1024 | orig_work_buf = map->work_buf; | |
1025 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 1026 | |
98bc7dfd MB |
1027 | ret = _regmap_update_bits(map, range->selector_reg, |
1028 | range->selector_mask, | |
1029 | win_page << range->selector_shift, | |
1030 | &page_chg); | |
632a5b01 | 1031 | |
98bc7dfd | 1032 | map->work_buf = orig_work_buf; |
6863ca62 | 1033 | |
0ff3e62f | 1034 | if (ret != 0) |
98bc7dfd | 1035 | return ret; |
6863ca62 KG |
1036 | } |
1037 | ||
98bc7dfd MB |
1038 | *reg = range->window_start + win_offset; |
1039 | ||
6863ca62 KG |
1040 | return 0; |
1041 | } | |
1042 | ||
584de329 | 1043 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
0a819809 | 1044 | const void *val, size_t val_len) |
b83a313b | 1045 | { |
98bc7dfd | 1046 | struct regmap_range_node *range; |
0d509f2b | 1047 | unsigned long flags; |
6f306441 | 1048 | u8 *u8 = map->work_buf; |
0d509f2b MB |
1049 | void *work_val = map->work_buf + map->format.reg_bytes + |
1050 | map->format.pad_bytes; | |
b83a313b MB |
1051 | void *buf; |
1052 | int ret = -ENOTSUPP; | |
1053 | size_t len; | |
73304781 MB |
1054 | int i; |
1055 | ||
f1b5c5c3 | 1056 | WARN_ON(!map->bus); |
d2a5884a | 1057 | |
73304781 MB |
1058 | /* Check for unwritable registers before we start */ |
1059 | if (map->writeable_reg) | |
1060 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
1061 | if (!map->writeable_reg(map->dev, |
1062 | reg + (i * map->reg_stride))) | |
73304781 | 1063 | return -EINVAL; |
b83a313b | 1064 | |
c9157198 LD |
1065 | if (!map->cache_bypass && map->format.parse_val) { |
1066 | unsigned int ival; | |
1067 | int val_bytes = map->format.val_bytes; | |
1068 | for (i = 0; i < val_len / val_bytes; i++) { | |
5a08d156 | 1069 | ival = map->format.parse_val(val + (i * val_bytes)); |
f01ee60f SW |
1070 | ret = regcache_write(map, reg + (i * map->reg_stride), |
1071 | ival); | |
c9157198 LD |
1072 | if (ret) { |
1073 | dev_err(map->dev, | |
6d04b8ac | 1074 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
1075 | reg + i, ret); |
1076 | return ret; | |
1077 | } | |
1078 | } | |
1079 | if (map->cache_only) { | |
1080 | map->cache_dirty = true; | |
1081 | return 0; | |
1082 | } | |
1083 | } | |
1084 | ||
98bc7dfd MB |
1085 | range = _regmap_range_lookup(map, reg); |
1086 | if (range) { | |
8a2ceac6 MB |
1087 | int val_num = val_len / map->format.val_bytes; |
1088 | int win_offset = (reg - range->range_min) % range->window_len; | |
1089 | int win_residue = range->window_len - win_offset; | |
1090 | ||
1091 | /* If the write goes beyond the end of the window split it */ | |
1092 | while (val_num > win_residue) { | |
1a61cfe3 | 1093 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
1094 | win_residue, val_len / map->format.val_bytes); |
1095 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0a819809 | 1096 | map->format.val_bytes); |
8a2ceac6 MB |
1097 | if (ret != 0) |
1098 | return ret; | |
1099 | ||
1100 | reg += win_residue; | |
1101 | val_num -= win_residue; | |
1102 | val += win_residue * map->format.val_bytes; | |
1103 | val_len -= win_residue * map->format.val_bytes; | |
1104 | ||
1105 | win_offset = (reg - range->range_min) % | |
1106 | range->window_len; | |
1107 | win_residue = range->window_len - win_offset; | |
1108 | } | |
1109 | ||
1110 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 1111 | if (ret != 0) |
98bc7dfd MB |
1112 | return ret; |
1113 | } | |
6863ca62 | 1114 | |
d939fb9a | 1115 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 1116 | |
6f306441 LPC |
1117 | u8[0] |= map->write_flag_mask; |
1118 | ||
651e013e MB |
1119 | /* |
1120 | * Essentially all I/O mechanisms will be faster with a single | |
1121 | * buffer to write. Since register syncs often generate raw | |
1122 | * writes of single registers optimise that case. | |
1123 | */ | |
1124 | if (val != work_val && val_len == map->format.val_bytes) { | |
1125 | memcpy(work_val, val, map->format.val_bytes); | |
1126 | val = work_val; | |
1127 | } | |
1128 | ||
0a819809 | 1129 | if (map->async && map->bus->async_write) { |
7e09a979 | 1130 | struct regmap_async *async; |
0d509f2b | 1131 | |
fe7d4ccd MB |
1132 | trace_regmap_async_write_start(map->dev, reg, val_len); |
1133 | ||
7e09a979 MB |
1134 | spin_lock_irqsave(&map->async_lock, flags); |
1135 | async = list_first_entry_or_null(&map->async_free, | |
1136 | struct regmap_async, | |
1137 | list); | |
1138 | if (async) | |
1139 | list_del(&async->list); | |
1140 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1141 | ||
1142 | if (!async) { | |
1143 | async = map->bus->async_alloc(); | |
1144 | if (!async) | |
1145 | return -ENOMEM; | |
1146 | ||
1147 | async->work_buf = kzalloc(map->format.buf_size, | |
1148 | GFP_KERNEL | GFP_DMA); | |
1149 | if (!async->work_buf) { | |
1150 | kfree(async); | |
1151 | return -ENOMEM; | |
1152 | } | |
0d509f2b MB |
1153 | } |
1154 | ||
0d509f2b MB |
1155 | async->map = map; |
1156 | ||
1157 | /* If the caller supplied the value we can use it safely. */ | |
1158 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
1159 | map->format.reg_bytes + map->format.val_bytes); | |
1160 | if (val == work_val) | |
1161 | val = async->work_buf + map->format.pad_bytes + | |
1162 | map->format.reg_bytes; | |
1163 | ||
1164 | spin_lock_irqsave(&map->async_lock, flags); | |
1165 | list_add_tail(&async->list, &map->async_list); | |
1166 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1167 | ||
1168 | ret = map->bus->async_write(map->bus_context, async->work_buf, | |
1169 | map->format.reg_bytes + | |
1170 | map->format.pad_bytes, | |
1171 | val, val_len, async); | |
1172 | ||
1173 | if (ret != 0) { | |
1174 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1175 | ret); | |
1176 | ||
1177 | spin_lock_irqsave(&map->async_lock, flags); | |
7e09a979 | 1178 | list_move(&async->list, &map->async_free); |
0d509f2b | 1179 | spin_unlock_irqrestore(&map->async_lock, flags); |
0d509f2b | 1180 | } |
f951b658 MB |
1181 | |
1182 | return ret; | |
0d509f2b MB |
1183 | } |
1184 | ||
fb2736bb MB |
1185 | trace_regmap_hw_write_start(map->dev, reg, |
1186 | val_len / map->format.val_bytes); | |
1187 | ||
2547e201 MB |
1188 | /* If we're doing a single register write we can probably just |
1189 | * send the work_buf directly, otherwise try to do a gather | |
1190 | * write. | |
1191 | */ | |
0d509f2b | 1192 | if (val == work_val) |
0135bbcc | 1193 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1194 | map->format.reg_bytes + |
1195 | map->format.pad_bytes + | |
1196 | val_len); | |
2547e201 | 1197 | else if (map->bus->gather_write) |
0135bbcc | 1198 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1199 | map->format.reg_bytes + |
1200 | map->format.pad_bytes, | |
b83a313b MB |
1201 | val, val_len); |
1202 | ||
2547e201 | 1203 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1204 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1205 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1206 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1207 | if (!buf) |
1208 | return -ENOMEM; | |
1209 | ||
1210 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1211 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1212 | val, val_len); | |
0135bbcc | 1213 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1214 | |
1215 | kfree(buf); | |
1216 | } | |
1217 | ||
fb2736bb MB |
1218 | trace_regmap_hw_write_done(map->dev, reg, |
1219 | val_len / map->format.val_bytes); | |
1220 | ||
b83a313b MB |
1221 | return ret; |
1222 | } | |
1223 | ||
221ad7f2 MB |
1224 | /** |
1225 | * regmap_can_raw_write - Test if regmap_raw_write() is supported | |
1226 | * | |
1227 | * @map: Map to check. | |
1228 | */ | |
1229 | bool regmap_can_raw_write(struct regmap *map) | |
1230 | { | |
1231 | return map->bus && map->format.format_val && map->format.format_reg; | |
1232 | } | |
1233 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); | |
1234 | ||
07c320dc AS |
1235 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1236 | unsigned int val) | |
1237 | { | |
1238 | int ret; | |
1239 | struct regmap_range_node *range; | |
1240 | struct regmap *map = context; | |
1241 | ||
f1b5c5c3 | 1242 | WARN_ON(!map->bus || !map->format.format_write); |
07c320dc AS |
1243 | |
1244 | range = _regmap_range_lookup(map, reg); | |
1245 | if (range) { | |
1246 | ret = _regmap_select_page(map, ®, range, 1); | |
1247 | if (ret != 0) | |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | map->format.format_write(map, reg, val); | |
1252 | ||
1253 | trace_regmap_hw_write_start(map->dev, reg, 1); | |
1254 | ||
1255 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1256 | map->format.buf_size); | |
1257 | ||
1258 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1259 | ||
1260 | return ret; | |
1261 | } | |
1262 | ||
1263 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
1264 | unsigned int val) | |
1265 | { | |
1266 | struct regmap *map = context; | |
1267 | ||
f1b5c5c3 | 1268 | WARN_ON(!map->bus || !map->format.format_val); |
07c320dc AS |
1269 | |
1270 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1271 | + map->format.pad_bytes, val, 0); | |
1272 | return _regmap_raw_write(map, reg, | |
1273 | map->work_buf + | |
1274 | map->format.reg_bytes + | |
1275 | map->format.pad_bytes, | |
0a819809 | 1276 | map->format.val_bytes); |
07c320dc AS |
1277 | } |
1278 | ||
d2a5884a AS |
1279 | static inline void *_regmap_map_get_context(struct regmap *map) |
1280 | { | |
1281 | return (map->bus) ? map : map->bus_context; | |
1282 | } | |
1283 | ||
4d2dc095 DP |
1284 | int _regmap_write(struct regmap *map, unsigned int reg, |
1285 | unsigned int val) | |
b83a313b | 1286 | { |
fb2736bb | 1287 | int ret; |
d2a5884a | 1288 | void *context = _regmap_map_get_context(map); |
b83a313b | 1289 | |
515f2261 IN |
1290 | if (!regmap_writeable(map, reg)) |
1291 | return -EIO; | |
1292 | ||
d2a5884a | 1293 | if (!map->cache_bypass && !map->defer_caching) { |
5d1729e7 DP |
1294 | ret = regcache_write(map, reg, val); |
1295 | if (ret != 0) | |
1296 | return ret; | |
8ae0d7e8 MB |
1297 | if (map->cache_only) { |
1298 | map->cache_dirty = true; | |
5d1729e7 | 1299 | return 0; |
8ae0d7e8 | 1300 | } |
5d1729e7 DP |
1301 | } |
1302 | ||
1044c180 MB |
1303 | #ifdef LOG_DEVICE |
1304 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1305 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1306 | #endif | |
1307 | ||
fb2736bb MB |
1308 | trace_regmap_reg_write(map->dev, reg, val); |
1309 | ||
d2a5884a | 1310 | return map->reg_write(context, reg, val); |
b83a313b MB |
1311 | } |
1312 | ||
1313 | /** | |
1314 | * regmap_write(): Write a value to a single register | |
1315 | * | |
1316 | * @map: Register map to write to | |
1317 | * @reg: Register to write to | |
1318 | * @val: Value to be written | |
1319 | * | |
1320 | * A value of zero will be returned on success, a negative errno will | |
1321 | * be returned in error cases. | |
1322 | */ | |
1323 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1324 | { | |
1325 | int ret; | |
1326 | ||
f01ee60f SW |
1327 | if (reg % map->reg_stride) |
1328 | return -EINVAL; | |
1329 | ||
0d4529c5 | 1330 | map->lock(map->lock_arg); |
b83a313b MB |
1331 | |
1332 | ret = _regmap_write(map, reg, val); | |
1333 | ||
0d4529c5 | 1334 | map->unlock(map->lock_arg); |
b83a313b MB |
1335 | |
1336 | return ret; | |
1337 | } | |
1338 | EXPORT_SYMBOL_GPL(regmap_write); | |
1339 | ||
1340 | /** | |
1341 | * regmap_raw_write(): Write raw values to one or more registers | |
1342 | * | |
1343 | * @map: Register map to write to | |
1344 | * @reg: Initial register to write to | |
1345 | * @val: Block of data to be written, laid out for direct transmission to the | |
1346 | * device | |
1347 | * @val_len: Length of data pointed to by val. | |
1348 | * | |
1349 | * This function is intended to be used for things like firmware | |
1350 | * download where a large block of data needs to be transferred to the | |
1351 | * device. No formatting will be done on the data provided. | |
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_raw_write(struct regmap *map, unsigned int reg, | |
1357 | const void *val, size_t val_len) | |
1358 | { | |
1359 | int ret; | |
1360 | ||
221ad7f2 | 1361 | if (!regmap_can_raw_write(map)) |
d2a5884a | 1362 | return -EINVAL; |
851960ba SW |
1363 | if (val_len % map->format.val_bytes) |
1364 | return -EINVAL; | |
1365 | ||
0d4529c5 | 1366 | map->lock(map->lock_arg); |
b83a313b | 1367 | |
0a819809 | 1368 | ret = _regmap_raw_write(map, reg, val, val_len); |
b83a313b | 1369 | |
0d4529c5 | 1370 | map->unlock(map->lock_arg); |
b83a313b MB |
1371 | |
1372 | return ret; | |
1373 | } | |
1374 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1375 | ||
67252287 SK |
1376 | /** |
1377 | * regmap_field_write(): Write a value to a single register field | |
1378 | * | |
1379 | * @field: Register field to write to | |
1380 | * @val: Value to be written | |
1381 | * | |
1382 | * A value of zero will be returned on success, a negative errno will | |
1383 | * be returned in error cases. | |
1384 | */ | |
1385 | int regmap_field_write(struct regmap_field *field, unsigned int val) | |
1386 | { | |
1387 | return regmap_update_bits(field->regmap, field->reg, | |
1388 | field->mask, val << field->shift); | |
1389 | } | |
1390 | EXPORT_SYMBOL_GPL(regmap_field_write); | |
1391 | ||
8eaeb219 LD |
1392 | /* |
1393 | * regmap_bulk_write(): Write multiple registers to the device | |
1394 | * | |
1395 | * @map: Register map to write to | |
1396 | * @reg: First register to be write from | |
1397 | * @val: Block of data to be written, in native register size for device | |
1398 | * @val_count: Number of registers to write | |
1399 | * | |
1400 | * This function is intended to be used for writing a large block of | |
31b35e9e | 1401 | * data to the device either in single transfer or multiple transfer. |
8eaeb219 LD |
1402 | * |
1403 | * A value of zero will be returned on success, a negative errno will | |
1404 | * be returned in error cases. | |
1405 | */ | |
1406 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1407 | size_t val_count) | |
1408 | { | |
1409 | int ret = 0, i; | |
1410 | size_t val_bytes = map->format.val_bytes; | |
1411 | void *wval; | |
1412 | ||
d2a5884a AS |
1413 | if (!map->bus) |
1414 | return -EINVAL; | |
8a819ff8 | 1415 | if (!map->format.parse_inplace) |
8eaeb219 | 1416 | return -EINVAL; |
f01ee60f SW |
1417 | if (reg % map->reg_stride) |
1418 | return -EINVAL; | |
8eaeb219 | 1419 | |
0d4529c5 | 1420 | map->lock(map->lock_arg); |
8eaeb219 LD |
1421 | |
1422 | /* No formatting is require if val_byte is 1 */ | |
1423 | if (val_bytes == 1) { | |
1424 | wval = (void *)val; | |
1425 | } else { | |
1426 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1427 | if (!wval) { | |
1428 | ret = -ENOMEM; | |
1429 | dev_err(map->dev, "Error in memory allocation\n"); | |
1430 | goto out; | |
1431 | } | |
1432 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1433 | map->format.parse_inplace(wval + i); |
8eaeb219 | 1434 | } |
2e33caf1 AJ |
1435 | /* |
1436 | * Some devices does not support bulk write, for | |
1437 | * them we have a series of single write operations. | |
1438 | */ | |
1439 | if (map->use_single_rw) { | |
1440 | for (i = 0; i < val_count; i++) { | |
1441 | ret = regmap_raw_write(map, | |
0d509f2b MB |
1442 | reg + (i * map->reg_stride), |
1443 | val + (i * val_bytes), | |
1444 | val_bytes); | |
2e33caf1 AJ |
1445 | if (ret != 0) |
1446 | return ret; | |
1447 | } | |
1448 | } else { | |
0a819809 | 1449 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); |
2e33caf1 | 1450 | } |
8eaeb219 LD |
1451 | |
1452 | if (val_bytes != 1) | |
1453 | kfree(wval); | |
1454 | ||
1455 | out: | |
0d4529c5 | 1456 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1457 | return ret; |
1458 | } | |
1459 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1460 | ||
0d509f2b MB |
1461 | /** |
1462 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1463 | * asynchronously | |
1464 | * | |
1465 | * @map: Register map to write to | |
1466 | * @reg: Initial register to write to | |
1467 | * @val: Block of data to be written, laid out for direct transmission to the | |
1468 | * device. Must be valid until regmap_async_complete() is called. | |
1469 | * @val_len: Length of data pointed to by val. | |
1470 | * | |
1471 | * This function is intended to be used for things like firmware | |
1472 | * download where a large block of data needs to be transferred to the | |
1473 | * device. No formatting will be done on the data provided. | |
1474 | * | |
1475 | * If supported by the underlying bus the write will be scheduled | |
1476 | * asynchronously, helping maximise I/O speed on higher speed buses | |
1477 | * like SPI. regmap_async_complete() can be called to ensure that all | |
1478 | * asynchrnous writes have been completed. | |
1479 | * | |
1480 | * A value of zero will be returned on success, a negative errno will | |
1481 | * be returned in error cases. | |
1482 | */ | |
1483 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
1484 | const void *val, size_t val_len) | |
1485 | { | |
1486 | int ret; | |
1487 | ||
1488 | if (val_len % map->format.val_bytes) | |
1489 | return -EINVAL; | |
1490 | if (reg % map->reg_stride) | |
1491 | return -EINVAL; | |
1492 | ||
1493 | map->lock(map->lock_arg); | |
1494 | ||
0a819809 MB |
1495 | map->async = true; |
1496 | ||
1497 | ret = _regmap_raw_write(map, reg, val, val_len); | |
1498 | ||
1499 | map->async = false; | |
0d509f2b MB |
1500 | |
1501 | map->unlock(map->lock_arg); | |
1502 | ||
1503 | return ret; | |
1504 | } | |
1505 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
1506 | ||
b83a313b MB |
1507 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1508 | unsigned int val_len) | |
1509 | { | |
98bc7dfd | 1510 | struct regmap_range_node *range; |
b83a313b MB |
1511 | u8 *u8 = map->work_buf; |
1512 | int ret; | |
1513 | ||
f1b5c5c3 | 1514 | WARN_ON(!map->bus); |
d2a5884a | 1515 | |
98bc7dfd MB |
1516 | range = _regmap_range_lookup(map, reg); |
1517 | if (range) { | |
1518 | ret = _regmap_select_page(map, ®, range, | |
1519 | val_len / map->format.val_bytes); | |
0ff3e62f | 1520 | if (ret != 0) |
98bc7dfd MB |
1521 | return ret; |
1522 | } | |
6863ca62 | 1523 | |
d939fb9a | 1524 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1525 | |
1526 | /* | |
6f306441 | 1527 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1528 | * register addresss; since it's always the high bits for all |
1529 | * current formats we can do this here rather than in | |
1530 | * formatting. This may break if we get interesting formats. | |
1531 | */ | |
6f306441 | 1532 | u8[0] |= map->read_flag_mask; |
b83a313b | 1533 | |
fb2736bb MB |
1534 | trace_regmap_hw_read_start(map->dev, reg, |
1535 | val_len / map->format.val_bytes); | |
1536 | ||
0135bbcc | 1537 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1538 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1539 | val, val_len); |
b83a313b | 1540 | |
fb2736bb MB |
1541 | trace_regmap_hw_read_done(map->dev, reg, |
1542 | val_len / map->format.val_bytes); | |
1543 | ||
1544 | return ret; | |
b83a313b MB |
1545 | } |
1546 | ||
ad278406 AS |
1547 | static int _regmap_bus_read(void *context, unsigned int reg, |
1548 | unsigned int *val) | |
1549 | { | |
1550 | int ret; | |
1551 | struct regmap *map = context; | |
1552 | ||
1553 | if (!map->format.parse_val) | |
1554 | return -EINVAL; | |
1555 | ||
1556 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1557 | if (ret == 0) | |
1558 | *val = map->format.parse_val(map->work_buf); | |
1559 | ||
1560 | return ret; | |
1561 | } | |
1562 | ||
b83a313b MB |
1563 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1564 | unsigned int *val) | |
1565 | { | |
1566 | int ret; | |
d2a5884a AS |
1567 | void *context = _regmap_map_get_context(map); |
1568 | ||
f1b5c5c3 | 1569 | WARN_ON(!map->reg_read); |
b83a313b | 1570 | |
5d1729e7 DP |
1571 | if (!map->cache_bypass) { |
1572 | ret = regcache_read(map, reg, val); | |
1573 | if (ret == 0) | |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | if (map->cache_only) | |
1578 | return -EBUSY; | |
1579 | ||
d2a5884a | 1580 | ret = map->reg_read(context, reg, val); |
fb2736bb | 1581 | if (ret == 0) { |
1044c180 MB |
1582 | #ifdef LOG_DEVICE |
1583 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1584 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1585 | #endif | |
1586 | ||
fb2736bb | 1587 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1588 | |
ad278406 AS |
1589 | if (!map->cache_bypass) |
1590 | regcache_write(map, reg, *val); | |
1591 | } | |
f2985367 | 1592 | |
b83a313b MB |
1593 | return ret; |
1594 | } | |
1595 | ||
1596 | /** | |
1597 | * regmap_read(): Read a value from a single register | |
1598 | * | |
1599 | * @map: Register map to write to | |
1600 | * @reg: Register to be read from | |
1601 | * @val: Pointer to store read value | |
1602 | * | |
1603 | * A value of zero will be returned on success, a negative errno will | |
1604 | * be returned in error cases. | |
1605 | */ | |
1606 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1607 | { | |
1608 | int ret; | |
1609 | ||
f01ee60f SW |
1610 | if (reg % map->reg_stride) |
1611 | return -EINVAL; | |
1612 | ||
0d4529c5 | 1613 | map->lock(map->lock_arg); |
b83a313b MB |
1614 | |
1615 | ret = _regmap_read(map, reg, val); | |
1616 | ||
0d4529c5 | 1617 | map->unlock(map->lock_arg); |
b83a313b MB |
1618 | |
1619 | return ret; | |
1620 | } | |
1621 | EXPORT_SYMBOL_GPL(regmap_read); | |
1622 | ||
1623 | /** | |
1624 | * regmap_raw_read(): Read raw data from the device | |
1625 | * | |
1626 | * @map: Register map to write to | |
1627 | * @reg: First register to be read from | |
1628 | * @val: Pointer to store read value | |
1629 | * @val_len: Size of data to read | |
1630 | * | |
1631 | * A value of zero will be returned on success, a negative errno will | |
1632 | * be returned in error cases. | |
1633 | */ | |
1634 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1635 | size_t val_len) | |
1636 | { | |
b8fb5ab1 MB |
1637 | size_t val_bytes = map->format.val_bytes; |
1638 | size_t val_count = val_len / val_bytes; | |
1639 | unsigned int v; | |
1640 | int ret, i; | |
04e016ad | 1641 | |
d2a5884a AS |
1642 | if (!map->bus) |
1643 | return -EINVAL; | |
851960ba SW |
1644 | if (val_len % map->format.val_bytes) |
1645 | return -EINVAL; | |
f01ee60f SW |
1646 | if (reg % map->reg_stride) |
1647 | return -EINVAL; | |
851960ba | 1648 | |
0d4529c5 | 1649 | map->lock(map->lock_arg); |
b83a313b | 1650 | |
b8fb5ab1 MB |
1651 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1652 | map->cache_type == REGCACHE_NONE) { | |
1653 | /* Physical block read if there's no cache involved */ | |
1654 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1655 | ||
1656 | } else { | |
1657 | /* Otherwise go word by word for the cache; should be low | |
1658 | * cost as we expect to hit the cache. | |
1659 | */ | |
1660 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1661 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1662 | &v); | |
b8fb5ab1 MB |
1663 | if (ret != 0) |
1664 | goto out; | |
1665 | ||
d939fb9a | 1666 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1667 | } |
1668 | } | |
b83a313b | 1669 | |
b8fb5ab1 | 1670 | out: |
0d4529c5 | 1671 | map->unlock(map->lock_arg); |
b83a313b MB |
1672 | |
1673 | return ret; | |
1674 | } | |
1675 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1676 | ||
67252287 SK |
1677 | /** |
1678 | * regmap_field_read(): Read a value to a single register field | |
1679 | * | |
1680 | * @field: Register field to read from | |
1681 | * @val: Pointer to store read value | |
1682 | * | |
1683 | * A value of zero will be returned on success, a negative errno will | |
1684 | * be returned in error cases. | |
1685 | */ | |
1686 | int regmap_field_read(struct regmap_field *field, unsigned int *val) | |
1687 | { | |
1688 | int ret; | |
1689 | unsigned int reg_val; | |
1690 | ret = regmap_read(field->regmap, field->reg, ®_val); | |
1691 | if (ret != 0) | |
1692 | return ret; | |
1693 | ||
1694 | reg_val &= field->mask; | |
1695 | reg_val >>= field->shift; | |
1696 | *val = reg_val; | |
1697 | ||
1698 | return ret; | |
1699 | } | |
1700 | EXPORT_SYMBOL_GPL(regmap_field_read); | |
1701 | ||
b83a313b MB |
1702 | /** |
1703 | * regmap_bulk_read(): Read multiple registers from the device | |
1704 | * | |
1705 | * @map: Register map to write to | |
1706 | * @reg: First register to be read from | |
1707 | * @val: Pointer to store read value, in native register size for device | |
1708 | * @val_count: Number of registers to read | |
1709 | * | |
1710 | * A value of zero will be returned on success, a negative errno will | |
1711 | * be returned in error cases. | |
1712 | */ | |
1713 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1714 | size_t val_count) | |
1715 | { | |
1716 | int ret, i; | |
1717 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1718 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1719 | |
d2a5884a AS |
1720 | if (!map->bus) |
1721 | return -EINVAL; | |
8a819ff8 | 1722 | if (!map->format.parse_inplace) |
b83a313b | 1723 | return -EINVAL; |
f01ee60f SW |
1724 | if (reg % map->reg_stride) |
1725 | return -EINVAL; | |
b83a313b | 1726 | |
de2d808f | 1727 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1728 | /* |
1729 | * Some devices does not support bulk read, for | |
1730 | * them we have a series of single read operations. | |
1731 | */ | |
1732 | if (map->use_single_rw) { | |
1733 | for (i = 0; i < val_count; i++) { | |
1734 | ret = regmap_raw_read(map, | |
1735 | reg + (i * map->reg_stride), | |
1736 | val + (i * val_bytes), | |
1737 | val_bytes); | |
1738 | if (ret != 0) | |
1739 | return ret; | |
1740 | } | |
1741 | } else { | |
1742 | ret = regmap_raw_read(map, reg, val, | |
1743 | val_bytes * val_count); | |
1744 | if (ret != 0) | |
1745 | return ret; | |
1746 | } | |
de2d808f MB |
1747 | |
1748 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1749 | map->format.parse_inplace(val + i); |
de2d808f MB |
1750 | } else { |
1751 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1752 | unsigned int ival; |
f01ee60f | 1753 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1754 | &ival); |
de2d808f MB |
1755 | if (ret != 0) |
1756 | return ret; | |
6560ffd1 | 1757 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1758 | } |
1759 | } | |
b83a313b MB |
1760 | |
1761 | return 0; | |
1762 | } | |
1763 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1764 | ||
018690d3 MB |
1765 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1766 | unsigned int mask, unsigned int val, | |
1767 | bool *change) | |
b83a313b MB |
1768 | { |
1769 | int ret; | |
d91e8db2 | 1770 | unsigned int tmp, orig; |
b83a313b | 1771 | |
d91e8db2 | 1772 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1773 | if (ret != 0) |
fc3ebd78 | 1774 | return ret; |
b83a313b | 1775 | |
d91e8db2 | 1776 | tmp = orig & ~mask; |
b83a313b MB |
1777 | tmp |= val & mask; |
1778 | ||
018690d3 | 1779 | if (tmp != orig) { |
d91e8db2 | 1780 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1781 | *change = true; |
1782 | } else { | |
1783 | *change = false; | |
1784 | } | |
b83a313b | 1785 | |
b83a313b MB |
1786 | return ret; |
1787 | } | |
018690d3 MB |
1788 | |
1789 | /** | |
1790 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1791 | * | |
1792 | * @map: Register map to update | |
1793 | * @reg: Register to update | |
1794 | * @mask: Bitmask to change | |
1795 | * @val: New value for bitmask | |
1796 | * | |
1797 | * Returns zero for success, a negative number on error. | |
1798 | */ | |
1799 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1800 | unsigned int mask, unsigned int val) | |
1801 | { | |
1802 | bool change; | |
fc3ebd78 KG |
1803 | int ret; |
1804 | ||
0d4529c5 | 1805 | map->lock(map->lock_arg); |
fc3ebd78 | 1806 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1807 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1808 | |
1809 | return ret; | |
018690d3 | 1810 | } |
b83a313b | 1811 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1812 | |
018690d3 MB |
1813 | /** |
1814 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1815 | * register map and report if updated | |
1816 | * | |
1817 | * @map: Register map to update | |
1818 | * @reg: Register to update | |
1819 | * @mask: Bitmask to change | |
1820 | * @val: New value for bitmask | |
1821 | * @change: Boolean indicating if a write was done | |
1822 | * | |
1823 | * Returns zero for success, a negative number on error. | |
1824 | */ | |
1825 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1826 | unsigned int mask, unsigned int val, | |
1827 | bool *change) | |
1828 | { | |
fc3ebd78 KG |
1829 | int ret; |
1830 | ||
0d4529c5 | 1831 | map->lock(map->lock_arg); |
fc3ebd78 | 1832 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1833 | map->unlock(map->lock_arg); |
fc3ebd78 | 1834 | return ret; |
018690d3 MB |
1835 | } |
1836 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1837 | ||
0d509f2b MB |
1838 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
1839 | { | |
1840 | struct regmap *map = async->map; | |
1841 | bool wake; | |
1842 | ||
fe7d4ccd MB |
1843 | trace_regmap_async_io_complete(map->dev); |
1844 | ||
0d509f2b | 1845 | spin_lock(&map->async_lock); |
7e09a979 | 1846 | list_move(&async->list, &map->async_free); |
0d509f2b MB |
1847 | wake = list_empty(&map->async_list); |
1848 | ||
1849 | if (ret != 0) | |
1850 | map->async_ret = ret; | |
1851 | ||
1852 | spin_unlock(&map->async_lock); | |
1853 | ||
0d509f2b MB |
1854 | if (wake) |
1855 | wake_up(&map->async_waitq); | |
1856 | } | |
f804fb56 | 1857 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
0d509f2b MB |
1858 | |
1859 | static int regmap_async_is_done(struct regmap *map) | |
1860 | { | |
1861 | unsigned long flags; | |
1862 | int ret; | |
1863 | ||
1864 | spin_lock_irqsave(&map->async_lock, flags); | |
1865 | ret = list_empty(&map->async_list); | |
1866 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1867 | ||
1868 | return ret; | |
1869 | } | |
1870 | ||
1871 | /** | |
1872 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
1873 | * | |
1874 | * @map: Map to operate on. | |
1875 | * | |
1876 | * Blocks until any pending asynchronous I/O has completed. Returns | |
1877 | * an error code for any failed I/O operations. | |
1878 | */ | |
1879 | int regmap_async_complete(struct regmap *map) | |
1880 | { | |
1881 | unsigned long flags; | |
1882 | int ret; | |
1883 | ||
1884 | /* Nothing to do with no async support */ | |
f2e055e7 | 1885 | if (!map->bus || !map->bus->async_write) |
0d509f2b MB |
1886 | return 0; |
1887 | ||
fe7d4ccd MB |
1888 | trace_regmap_async_complete_start(map->dev); |
1889 | ||
0d509f2b MB |
1890 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
1891 | ||
1892 | spin_lock_irqsave(&map->async_lock, flags); | |
1893 | ret = map->async_ret; | |
1894 | map->async_ret = 0; | |
1895 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1896 | ||
fe7d4ccd MB |
1897 | trace_regmap_async_complete_done(map->dev); |
1898 | ||
0d509f2b MB |
1899 | return ret; |
1900 | } | |
f88948ef | 1901 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
0d509f2b | 1902 | |
22f0d90a MB |
1903 | /** |
1904 | * regmap_register_patch: Register and apply register updates to be applied | |
1905 | * on device initialistion | |
1906 | * | |
1907 | * @map: Register map to apply updates to. | |
1908 | * @regs: Values to update. | |
1909 | * @num_regs: Number of entries in regs. | |
1910 | * | |
1911 | * Register a set of register updates to be applied to the device | |
1912 | * whenever the device registers are synchronised with the cache and | |
1913 | * apply them immediately. Typically this is used to apply | |
1914 | * corrections to be applied to the device defaults on startup, such | |
1915 | * as the updates some vendors provide to undocumented registers. | |
1916 | */ | |
1917 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1918 | int num_regs) | |
1919 | { | |
aab13ebc | 1920 | struct reg_default *p; |
22f0d90a MB |
1921 | int i, ret; |
1922 | bool bypass; | |
1923 | ||
0d4529c5 | 1924 | map->lock(map->lock_arg); |
22f0d90a MB |
1925 | |
1926 | bypass = map->cache_bypass; | |
1927 | ||
1928 | map->cache_bypass = true; | |
1929 | ||
1930 | /* Write out first; it's useful to apply even if we fail later. */ | |
1931 | for (i = 0; i < num_regs; i++) { | |
1932 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1933 | if (ret != 0) { | |
1934 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1935 | regs[i].reg, regs[i].def, ret); | |
1936 | goto out; | |
1937 | } | |
1938 | } | |
1939 | ||
aab13ebc MB |
1940 | p = krealloc(map->patch, |
1941 | sizeof(struct reg_default) * (map->patch_regs + num_regs), | |
1942 | GFP_KERNEL); | |
1943 | if (p) { | |
1944 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); | |
1945 | map->patch = p; | |
1946 | map->patch_regs += num_regs; | |
22f0d90a MB |
1947 | } else { |
1948 | ret = -ENOMEM; | |
1949 | } | |
1950 | ||
1951 | out: | |
1952 | map->cache_bypass = bypass; | |
1953 | ||
0d4529c5 | 1954 | map->unlock(map->lock_arg); |
22f0d90a MB |
1955 | |
1956 | return ret; | |
1957 | } | |
1958 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1959 | ||
eae4b51b | 1960 | /* |
a6539c32 MB |
1961 | * regmap_get_val_bytes(): Report the size of a register value |
1962 | * | |
1963 | * Report the size of a register value, mainly intended to for use by | |
1964 | * generic infrastructure built on top of regmap. | |
1965 | */ | |
1966 | int regmap_get_val_bytes(struct regmap *map) | |
1967 | { | |
1968 | if (map->format.format_write) | |
1969 | return -EINVAL; | |
1970 | ||
1971 | return map->format.val_bytes; | |
1972 | } | |
1973 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1974 | ||
31244e39 MB |
1975 | static int __init regmap_initcall(void) |
1976 | { | |
1977 | regmap_debugfs_initcall(); | |
1978 | ||
1979 | return 0; | |
1980 | } | |
1981 | postcore_initcall(regmap_initcall); |