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> | |
d647c199 | 18 | #include <linux/of.h> |
6863ca62 | 19 | #include <linux/rbtree.h> |
30b2a553 | 20 | #include <linux/sched.h> |
b83a313b | 21 | |
fb2736bb | 22 | #define CREATE_TRACE_POINTS |
f58078da | 23 | #include "trace.h" |
fb2736bb | 24 | |
93de9124 | 25 | #include "internal.h" |
b83a313b | 26 | |
1044c180 MB |
27 | /* |
28 | * Sometimes for failures during very early init the trace | |
29 | * infrastructure isn't available early enough to be used. For this | |
30 | * sort of problem defining LOG_DEVICE will add printks for basic | |
31 | * register I/O on a specific device. | |
32 | */ | |
33 | #undef LOG_DEVICE | |
34 | ||
35 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
36 | unsigned int mask, unsigned int val, | |
37 | bool *change); | |
38 | ||
3ac17037 BB |
39 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
40 | unsigned int *val); | |
ad278406 AS |
41 | static int _regmap_bus_read(void *context, unsigned int reg, |
42 | unsigned int *val); | |
07c320dc AS |
43 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
44 | unsigned int val); | |
3ac17037 BB |
45 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
46 | unsigned int val); | |
07c320dc AS |
47 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
48 | unsigned int val); | |
ad278406 | 49 | |
76aad392 DC |
50 | bool regmap_reg_in_ranges(unsigned int reg, |
51 | const struct regmap_range *ranges, | |
52 | unsigned int nranges) | |
53 | { | |
54 | const struct regmap_range *r; | |
55 | int i; | |
56 | ||
57 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
58 | if (regmap_reg_in_range(reg, r)) | |
59 | return true; | |
60 | return false; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
63 | ||
154881e5 MB |
64 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
65 | const struct regmap_access_table *table) | |
76aad392 DC |
66 | { |
67 | /* Check "no ranges" first */ | |
68 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
69 | return false; | |
70 | ||
71 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
72 | if (!table->n_yes_ranges) | |
73 | return true; | |
74 | ||
75 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
76 | table->n_yes_ranges); | |
77 | } | |
154881e5 | 78 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
76aad392 | 79 | |
8de2f081 MB |
80 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
81 | { | |
82 | if (map->max_register && reg > map->max_register) | |
83 | return false; | |
84 | ||
85 | if (map->writeable_reg) | |
86 | return map->writeable_reg(map->dev, reg); | |
87 | ||
76aad392 | 88 | if (map->wr_table) |
154881e5 | 89 | return regmap_check_range_table(map, reg, map->wr_table); |
76aad392 | 90 | |
8de2f081 MB |
91 | return true; |
92 | } | |
93 | ||
94 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
95 | { | |
04dc91ce LPC |
96 | if (!map->reg_read) |
97 | return false; | |
98 | ||
8de2f081 MB |
99 | if (map->max_register && reg > map->max_register) |
100 | return false; | |
101 | ||
4191f197 WS |
102 | if (map->format.format_write) |
103 | return false; | |
104 | ||
8de2f081 MB |
105 | if (map->readable_reg) |
106 | return map->readable_reg(map->dev, reg); | |
107 | ||
76aad392 | 108 | if (map->rd_table) |
154881e5 | 109 | return regmap_check_range_table(map, reg, map->rd_table); |
76aad392 | 110 | |
8de2f081 MB |
111 | return true; |
112 | } | |
113 | ||
114 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
115 | { | |
5844a8b9 | 116 | if (!map->format.format_write && !regmap_readable(map, reg)) |
8de2f081 MB |
117 | return false; |
118 | ||
119 | if (map->volatile_reg) | |
120 | return map->volatile_reg(map->dev, reg); | |
121 | ||
76aad392 | 122 | if (map->volatile_table) |
154881e5 | 123 | return regmap_check_range_table(map, reg, map->volatile_table); |
76aad392 | 124 | |
b92be6fe MB |
125 | if (map->cache_ops) |
126 | return false; | |
127 | else | |
128 | return true; | |
8de2f081 MB |
129 | } |
130 | ||
131 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
132 | { | |
4191f197 | 133 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
134 | return false; |
135 | ||
136 | if (map->precious_reg) | |
137 | return map->precious_reg(map->dev, reg); | |
138 | ||
76aad392 | 139 | if (map->precious_table) |
154881e5 | 140 | return regmap_check_range_table(map, reg, map->precious_table); |
76aad392 | 141 | |
8de2f081 MB |
142 | return false; |
143 | } | |
144 | ||
82cd9965 | 145 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 146 | size_t num) |
82cd9965 LPC |
147 | { |
148 | unsigned int i; | |
149 | ||
150 | for (i = 0; i < num; i++) | |
151 | if (!regmap_volatile(map, reg + i)) | |
152 | return false; | |
153 | ||
154 | return true; | |
155 | } | |
156 | ||
9aa50750 WS |
157 | static void regmap_format_2_6_write(struct regmap *map, |
158 | unsigned int reg, unsigned int val) | |
159 | { | |
160 | u8 *out = map->work_buf; | |
161 | ||
162 | *out = (reg << 6) | val; | |
163 | } | |
164 | ||
b83a313b MB |
165 | static void regmap_format_4_12_write(struct regmap *map, |
166 | unsigned int reg, unsigned int val) | |
167 | { | |
168 | __be16 *out = map->work_buf; | |
169 | *out = cpu_to_be16((reg << 12) | val); | |
170 | } | |
171 | ||
172 | static void regmap_format_7_9_write(struct regmap *map, | |
173 | unsigned int reg, unsigned int val) | |
174 | { | |
175 | __be16 *out = map->work_buf; | |
176 | *out = cpu_to_be16((reg << 9) | val); | |
177 | } | |
178 | ||
7e5ec63e LPC |
179 | static void regmap_format_10_14_write(struct regmap *map, |
180 | unsigned int reg, unsigned int val) | |
181 | { | |
182 | u8 *out = map->work_buf; | |
183 | ||
184 | out[2] = val; | |
185 | out[1] = (val >> 8) | (reg << 6); | |
186 | out[0] = reg >> 2; | |
187 | } | |
188 | ||
d939fb9a | 189 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
190 | { |
191 | u8 *b = buf; | |
192 | ||
d939fb9a | 193 | b[0] = val << shift; |
b83a313b MB |
194 | } |
195 | ||
141eba2e | 196 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
197 | { |
198 | __be16 *b = buf; | |
199 | ||
d939fb9a | 200 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
201 | } |
202 | ||
4aa8c069 XL |
203 | static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift) |
204 | { | |
205 | __le16 *b = buf; | |
206 | ||
207 | b[0] = cpu_to_le16(val << shift); | |
208 | } | |
209 | ||
141eba2e SW |
210 | static void regmap_format_16_native(void *buf, unsigned int val, |
211 | unsigned int shift) | |
212 | { | |
213 | *(u16 *)buf = val << shift; | |
214 | } | |
215 | ||
d939fb9a | 216 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
217 | { |
218 | u8 *b = buf; | |
219 | ||
d939fb9a MR |
220 | val <<= shift; |
221 | ||
ea279fc5 MR |
222 | b[0] = val >> 16; |
223 | b[1] = val >> 8; | |
224 | b[2] = val; | |
225 | } | |
226 | ||
141eba2e | 227 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
228 | { |
229 | __be32 *b = buf; | |
230 | ||
d939fb9a | 231 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
232 | } |
233 | ||
4aa8c069 XL |
234 | static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift) |
235 | { | |
236 | __le32 *b = buf; | |
237 | ||
238 | b[0] = cpu_to_le32(val << shift); | |
239 | } | |
240 | ||
141eba2e SW |
241 | static void regmap_format_32_native(void *buf, unsigned int val, |
242 | unsigned int shift) | |
243 | { | |
244 | *(u32 *)buf = val << shift; | |
245 | } | |
246 | ||
8a819ff8 | 247 | static void regmap_parse_inplace_noop(void *buf) |
b83a313b | 248 | { |
8a819ff8 MB |
249 | } |
250 | ||
251 | static unsigned int regmap_parse_8(const void *buf) | |
252 | { | |
253 | const u8 *b = buf; | |
b83a313b MB |
254 | |
255 | return b[0]; | |
256 | } | |
257 | ||
8a819ff8 MB |
258 | static unsigned int regmap_parse_16_be(const void *buf) |
259 | { | |
260 | const __be16 *b = buf; | |
261 | ||
262 | return be16_to_cpu(b[0]); | |
263 | } | |
264 | ||
4aa8c069 XL |
265 | static unsigned int regmap_parse_16_le(const void *buf) |
266 | { | |
267 | const __le16 *b = buf; | |
268 | ||
269 | return le16_to_cpu(b[0]); | |
270 | } | |
271 | ||
8a819ff8 | 272 | static void regmap_parse_16_be_inplace(void *buf) |
b83a313b MB |
273 | { |
274 | __be16 *b = buf; | |
275 | ||
276 | b[0] = be16_to_cpu(b[0]); | |
b83a313b MB |
277 | } |
278 | ||
4aa8c069 XL |
279 | static void regmap_parse_16_le_inplace(void *buf) |
280 | { | |
281 | __le16 *b = buf; | |
282 | ||
283 | b[0] = le16_to_cpu(b[0]); | |
284 | } | |
285 | ||
8a819ff8 | 286 | static unsigned int regmap_parse_16_native(const void *buf) |
141eba2e SW |
287 | { |
288 | return *(u16 *)buf; | |
289 | } | |
290 | ||
8a819ff8 | 291 | static unsigned int regmap_parse_24(const void *buf) |
ea279fc5 | 292 | { |
8a819ff8 | 293 | const u8 *b = buf; |
ea279fc5 MR |
294 | unsigned int ret = b[2]; |
295 | ret |= ((unsigned int)b[1]) << 8; | |
296 | ret |= ((unsigned int)b[0]) << 16; | |
297 | ||
298 | return ret; | |
299 | } | |
300 | ||
8a819ff8 MB |
301 | static unsigned int regmap_parse_32_be(const void *buf) |
302 | { | |
303 | const __be32 *b = buf; | |
304 | ||
305 | return be32_to_cpu(b[0]); | |
306 | } | |
307 | ||
4aa8c069 XL |
308 | static unsigned int regmap_parse_32_le(const void *buf) |
309 | { | |
310 | const __le32 *b = buf; | |
311 | ||
312 | return le32_to_cpu(b[0]); | |
313 | } | |
314 | ||
8a819ff8 | 315 | static void regmap_parse_32_be_inplace(void *buf) |
7d5e525b MB |
316 | { |
317 | __be32 *b = buf; | |
318 | ||
319 | b[0] = be32_to_cpu(b[0]); | |
7d5e525b MB |
320 | } |
321 | ||
4aa8c069 XL |
322 | static void regmap_parse_32_le_inplace(void *buf) |
323 | { | |
324 | __le32 *b = buf; | |
325 | ||
326 | b[0] = le32_to_cpu(b[0]); | |
327 | } | |
328 | ||
8a819ff8 | 329 | static unsigned int regmap_parse_32_native(const void *buf) |
141eba2e SW |
330 | { |
331 | return *(u32 *)buf; | |
332 | } | |
333 | ||
0d4529c5 | 334 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 335 | { |
0d4529c5 | 336 | struct regmap *map = __map; |
bacdbe07 SW |
337 | mutex_lock(&map->mutex); |
338 | } | |
339 | ||
0d4529c5 | 340 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 341 | { |
0d4529c5 | 342 | struct regmap *map = __map; |
bacdbe07 SW |
343 | mutex_unlock(&map->mutex); |
344 | } | |
345 | ||
0d4529c5 | 346 | static void regmap_lock_spinlock(void *__map) |
b4519c71 | 347 | __acquires(&map->spinlock) |
bacdbe07 | 348 | { |
0d4529c5 | 349 | struct regmap *map = __map; |
92ab1aab LPC |
350 | unsigned long flags; |
351 | ||
352 | spin_lock_irqsave(&map->spinlock, flags); | |
353 | map->spinlock_flags = flags; | |
bacdbe07 SW |
354 | } |
355 | ||
0d4529c5 | 356 | static void regmap_unlock_spinlock(void *__map) |
b4519c71 | 357 | __releases(&map->spinlock) |
bacdbe07 | 358 | { |
0d4529c5 | 359 | struct regmap *map = __map; |
92ab1aab | 360 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
bacdbe07 SW |
361 | } |
362 | ||
72b39f6f MB |
363 | static void dev_get_regmap_release(struct device *dev, void *res) |
364 | { | |
365 | /* | |
366 | * We don't actually have anything to do here; the goal here | |
367 | * is not to manage the regmap but to provide a simple way to | |
368 | * get the regmap back given a struct device. | |
369 | */ | |
370 | } | |
371 | ||
6863ca62 KG |
372 | static bool _regmap_range_add(struct regmap *map, |
373 | struct regmap_range_node *data) | |
374 | { | |
375 | struct rb_root *root = &map->range_tree; | |
376 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
377 | ||
378 | while (*new) { | |
379 | struct regmap_range_node *this = | |
380 | container_of(*new, struct regmap_range_node, node); | |
381 | ||
382 | parent = *new; | |
383 | if (data->range_max < this->range_min) | |
384 | new = &((*new)->rb_left); | |
385 | else if (data->range_min > this->range_max) | |
386 | new = &((*new)->rb_right); | |
387 | else | |
388 | return false; | |
389 | } | |
390 | ||
391 | rb_link_node(&data->node, parent, new); | |
392 | rb_insert_color(&data->node, root); | |
393 | ||
394 | return true; | |
395 | } | |
396 | ||
397 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
398 | unsigned int reg) | |
399 | { | |
400 | struct rb_node *node = map->range_tree.rb_node; | |
401 | ||
402 | while (node) { | |
403 | struct regmap_range_node *this = | |
404 | container_of(node, struct regmap_range_node, node); | |
405 | ||
406 | if (reg < this->range_min) | |
407 | node = node->rb_left; | |
408 | else if (reg > this->range_max) | |
409 | node = node->rb_right; | |
410 | else | |
411 | return this; | |
412 | } | |
413 | ||
414 | return NULL; | |
415 | } | |
416 | ||
417 | static void regmap_range_exit(struct regmap *map) | |
418 | { | |
419 | struct rb_node *next; | |
420 | struct regmap_range_node *range_node; | |
421 | ||
422 | next = rb_first(&map->range_tree); | |
423 | while (next) { | |
424 | range_node = rb_entry(next, struct regmap_range_node, node); | |
425 | next = rb_next(&range_node->node); | |
426 | rb_erase(&range_node->node, &map->range_tree); | |
427 | kfree(range_node); | |
428 | } | |
429 | ||
430 | kfree(map->selector_work_buf); | |
431 | } | |
432 | ||
6cfec04b MS |
433 | int regmap_attach_dev(struct device *dev, struct regmap *map, |
434 | const struct regmap_config *config) | |
435 | { | |
436 | struct regmap **m; | |
437 | ||
438 | map->dev = dev; | |
439 | ||
440 | regmap_debugfs_init(map, config->name); | |
441 | ||
442 | /* Add a devres resource for dev_get_regmap() */ | |
443 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
444 | if (!m) { | |
445 | regmap_debugfs_exit(map); | |
446 | return -ENOMEM; | |
447 | } | |
448 | *m = map; | |
449 | devres_add(dev, m); | |
450 | ||
451 | return 0; | |
452 | } | |
453 | EXPORT_SYMBOL_GPL(regmap_attach_dev); | |
454 | ||
cf673fbc GU |
455 | static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus, |
456 | const struct regmap_config *config) | |
457 | { | |
458 | enum regmap_endian endian; | |
459 | ||
460 | /* Retrieve the endianness specification from the regmap config */ | |
461 | endian = config->reg_format_endian; | |
462 | ||
463 | /* If the regmap config specified a non-default value, use that */ | |
464 | if (endian != REGMAP_ENDIAN_DEFAULT) | |
465 | return endian; | |
466 | ||
467 | /* Retrieve the endianness specification from the bus config */ | |
468 | if (bus && bus->reg_format_endian_default) | |
469 | endian = bus->reg_format_endian_default; | |
d647c199 | 470 | |
cf673fbc GU |
471 | /* If the bus specified a non-default value, use that */ |
472 | if (endian != REGMAP_ENDIAN_DEFAULT) | |
473 | return endian; | |
474 | ||
475 | /* Use this if no other value was found */ | |
476 | return REGMAP_ENDIAN_BIG; | |
477 | } | |
478 | ||
3c174d29 GR |
479 | enum regmap_endian regmap_get_val_endian(struct device *dev, |
480 | const struct regmap_bus *bus, | |
481 | const struct regmap_config *config) | |
d647c199 | 482 | { |
6e64b6cc | 483 | struct device_node *np; |
cf673fbc | 484 | enum regmap_endian endian; |
d647c199 | 485 | |
45e1a279 | 486 | /* Retrieve the endianness specification from the regmap config */ |
cf673fbc | 487 | endian = config->val_format_endian; |
d647c199 | 488 | |
45e1a279 | 489 | /* If the regmap config specified a non-default value, use that */ |
cf673fbc GU |
490 | if (endian != REGMAP_ENDIAN_DEFAULT) |
491 | return endian; | |
d647c199 | 492 | |
6e64b6cc PD |
493 | /* If the dev and dev->of_node exist try to get endianness from DT */ |
494 | if (dev && dev->of_node) { | |
495 | np = dev->of_node; | |
d647c199 | 496 | |
6e64b6cc PD |
497 | /* Parse the device's DT node for an endianness specification */ |
498 | if (of_property_read_bool(np, "big-endian")) | |
499 | endian = REGMAP_ENDIAN_BIG; | |
500 | else if (of_property_read_bool(np, "little-endian")) | |
501 | endian = REGMAP_ENDIAN_LITTLE; | |
502 | ||
503 | /* If the endianness was specified in DT, use that */ | |
504 | if (endian != REGMAP_ENDIAN_DEFAULT) | |
505 | return endian; | |
506 | } | |
45e1a279 SW |
507 | |
508 | /* Retrieve the endianness specification from the bus config */ | |
cf673fbc GU |
509 | if (bus && bus->val_format_endian_default) |
510 | endian = bus->val_format_endian_default; | |
d647c199 | 511 | |
45e1a279 | 512 | /* If the bus specified a non-default value, use that */ |
cf673fbc GU |
513 | if (endian != REGMAP_ENDIAN_DEFAULT) |
514 | return endian; | |
45e1a279 SW |
515 | |
516 | /* Use this if no other value was found */ | |
cf673fbc | 517 | return REGMAP_ENDIAN_BIG; |
d647c199 | 518 | } |
3c174d29 | 519 | EXPORT_SYMBOL_GPL(regmap_get_val_endian); |
d647c199 | 520 | |
b83a313b MB |
521 | /** |
522 | * regmap_init(): Initialise register map | |
523 | * | |
524 | * @dev: Device that will be interacted with | |
525 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 526 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
527 | * @config: Configuration for register map |
528 | * | |
529 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
530 | * a struct regmap. This function should generally not be called | |
531 | * directly, it should be called by bus-specific init functions. | |
532 | */ | |
533 | struct regmap *regmap_init(struct device *dev, | |
534 | const struct regmap_bus *bus, | |
0135bbcc | 535 | void *bus_context, |
b83a313b MB |
536 | const struct regmap_config *config) |
537 | { | |
6cfec04b | 538 | struct regmap *map; |
b83a313b | 539 | int ret = -EINVAL; |
141eba2e | 540 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 541 | int i, j; |
b83a313b | 542 | |
d2a5884a | 543 | if (!config) |
abbb18fb | 544 | goto err; |
b83a313b MB |
545 | |
546 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
547 | if (map == NULL) { | |
548 | ret = -ENOMEM; | |
549 | goto err; | |
550 | } | |
551 | ||
0d4529c5 DC |
552 | if (config->lock && config->unlock) { |
553 | map->lock = config->lock; | |
554 | map->unlock = config->unlock; | |
555 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 556 | } else { |
d2a5884a AS |
557 | if ((bus && bus->fast_io) || |
558 | config->fast_io) { | |
0d4529c5 DC |
559 | spin_lock_init(&map->spinlock); |
560 | map->lock = regmap_lock_spinlock; | |
561 | map->unlock = regmap_unlock_spinlock; | |
562 | } else { | |
563 | mutex_init(&map->mutex); | |
564 | map->lock = regmap_lock_mutex; | |
565 | map->unlock = regmap_unlock_mutex; | |
566 | } | |
567 | map->lock_arg = map; | |
bacdbe07 | 568 | } |
c212accc | 569 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 570 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 571 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
572 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
573 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 574 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
575 | if (config->reg_stride) |
576 | map->reg_stride = config->reg_stride; | |
577 | else | |
578 | map->reg_stride = 1; | |
2e33caf1 | 579 | map->use_single_rw = config->use_single_rw; |
e894c3f4 | 580 | map->can_multi_write = config->can_multi_write; |
b83a313b MB |
581 | map->dev = dev; |
582 | map->bus = bus; | |
0135bbcc | 583 | map->bus_context = bus_context; |
2e2ae66d | 584 | map->max_register = config->max_register; |
76aad392 DC |
585 | map->wr_table = config->wr_table; |
586 | map->rd_table = config->rd_table; | |
587 | map->volatile_table = config->volatile_table; | |
588 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
589 | map->writeable_reg = config->writeable_reg; |
590 | map->readable_reg = config->readable_reg; | |
591 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 592 | map->precious_reg = config->precious_reg; |
5d1729e7 | 593 | map->cache_type = config->cache_type; |
72b39f6f | 594 | map->name = config->name; |
b83a313b | 595 | |
0d509f2b MB |
596 | spin_lock_init(&map->async_lock); |
597 | INIT_LIST_HEAD(&map->async_list); | |
7e09a979 | 598 | INIT_LIST_HEAD(&map->async_free); |
0d509f2b MB |
599 | init_waitqueue_head(&map->async_waitq); |
600 | ||
6f306441 LPC |
601 | if (config->read_flag_mask || config->write_flag_mask) { |
602 | map->read_flag_mask = config->read_flag_mask; | |
603 | map->write_flag_mask = config->write_flag_mask; | |
d2a5884a | 604 | } else if (bus) { |
6f306441 LPC |
605 | map->read_flag_mask = bus->read_flag_mask; |
606 | } | |
607 | ||
d2a5884a AS |
608 | if (!bus) { |
609 | map->reg_read = config->reg_read; | |
610 | map->reg_write = config->reg_write; | |
611 | ||
3ac17037 BB |
612 | map->defer_caching = false; |
613 | goto skip_format_initialization; | |
614 | } else if (!bus->read || !bus->write) { | |
615 | map->reg_read = _regmap_bus_reg_read; | |
616 | map->reg_write = _regmap_bus_reg_write; | |
617 | ||
d2a5884a AS |
618 | map->defer_caching = false; |
619 | goto skip_format_initialization; | |
620 | } else { | |
621 | map->reg_read = _regmap_bus_read; | |
622 | } | |
ad278406 | 623 | |
cf673fbc GU |
624 | reg_endian = regmap_get_reg_endian(bus, config); |
625 | val_endian = regmap_get_val_endian(dev, bus, config); | |
141eba2e | 626 | |
d939fb9a | 627 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
628 | case 2: |
629 | switch (config->val_bits) { | |
630 | case 6: | |
631 | map->format.format_write = regmap_format_2_6_write; | |
632 | break; | |
633 | default: | |
634 | goto err_map; | |
635 | } | |
636 | break; | |
637 | ||
b83a313b MB |
638 | case 4: |
639 | switch (config->val_bits) { | |
640 | case 12: | |
641 | map->format.format_write = regmap_format_4_12_write; | |
642 | break; | |
643 | default: | |
644 | goto err_map; | |
645 | } | |
646 | break; | |
647 | ||
648 | case 7: | |
649 | switch (config->val_bits) { | |
650 | case 9: | |
651 | map->format.format_write = regmap_format_7_9_write; | |
652 | break; | |
653 | default: | |
654 | goto err_map; | |
655 | } | |
656 | break; | |
657 | ||
7e5ec63e LPC |
658 | case 10: |
659 | switch (config->val_bits) { | |
660 | case 14: | |
661 | map->format.format_write = regmap_format_10_14_write; | |
662 | break; | |
663 | default: | |
664 | goto err_map; | |
665 | } | |
666 | break; | |
667 | ||
b83a313b MB |
668 | case 8: |
669 | map->format.format_reg = regmap_format_8; | |
670 | break; | |
671 | ||
672 | case 16: | |
141eba2e SW |
673 | switch (reg_endian) { |
674 | case REGMAP_ENDIAN_BIG: | |
675 | map->format.format_reg = regmap_format_16_be; | |
676 | break; | |
677 | case REGMAP_ENDIAN_NATIVE: | |
678 | map->format.format_reg = regmap_format_16_native; | |
679 | break; | |
680 | default: | |
681 | goto err_map; | |
682 | } | |
b83a313b MB |
683 | break; |
684 | ||
237019e7 LPC |
685 | case 24: |
686 | if (reg_endian != REGMAP_ENDIAN_BIG) | |
687 | goto err_map; | |
688 | map->format.format_reg = regmap_format_24; | |
689 | break; | |
690 | ||
7d5e525b | 691 | case 32: |
141eba2e SW |
692 | switch (reg_endian) { |
693 | case REGMAP_ENDIAN_BIG: | |
694 | map->format.format_reg = regmap_format_32_be; | |
695 | break; | |
696 | case REGMAP_ENDIAN_NATIVE: | |
697 | map->format.format_reg = regmap_format_32_native; | |
698 | break; | |
699 | default: | |
700 | goto err_map; | |
701 | } | |
7d5e525b MB |
702 | break; |
703 | ||
b83a313b MB |
704 | default: |
705 | goto err_map; | |
706 | } | |
707 | ||
8a819ff8 MB |
708 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
709 | map->format.parse_inplace = regmap_parse_inplace_noop; | |
710 | ||
b83a313b MB |
711 | switch (config->val_bits) { |
712 | case 8: | |
713 | map->format.format_val = regmap_format_8; | |
714 | map->format.parse_val = regmap_parse_8; | |
8a819ff8 | 715 | map->format.parse_inplace = regmap_parse_inplace_noop; |
b83a313b MB |
716 | break; |
717 | case 16: | |
141eba2e SW |
718 | switch (val_endian) { |
719 | case REGMAP_ENDIAN_BIG: | |
720 | map->format.format_val = regmap_format_16_be; | |
721 | map->format.parse_val = regmap_parse_16_be; | |
8a819ff8 | 722 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
141eba2e | 723 | break; |
4aa8c069 XL |
724 | case REGMAP_ENDIAN_LITTLE: |
725 | map->format.format_val = regmap_format_16_le; | |
726 | map->format.parse_val = regmap_parse_16_le; | |
727 | map->format.parse_inplace = regmap_parse_16_le_inplace; | |
728 | break; | |
141eba2e SW |
729 | case REGMAP_ENDIAN_NATIVE: |
730 | map->format.format_val = regmap_format_16_native; | |
731 | map->format.parse_val = regmap_parse_16_native; | |
732 | break; | |
733 | default: | |
734 | goto err_map; | |
735 | } | |
b83a313b | 736 | break; |
ea279fc5 | 737 | case 24: |
141eba2e SW |
738 | if (val_endian != REGMAP_ENDIAN_BIG) |
739 | goto err_map; | |
ea279fc5 MR |
740 | map->format.format_val = regmap_format_24; |
741 | map->format.parse_val = regmap_parse_24; | |
742 | break; | |
7d5e525b | 743 | case 32: |
141eba2e SW |
744 | switch (val_endian) { |
745 | case REGMAP_ENDIAN_BIG: | |
746 | map->format.format_val = regmap_format_32_be; | |
747 | map->format.parse_val = regmap_parse_32_be; | |
8a819ff8 | 748 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
141eba2e | 749 | break; |
4aa8c069 XL |
750 | case REGMAP_ENDIAN_LITTLE: |
751 | map->format.format_val = regmap_format_32_le; | |
752 | map->format.parse_val = regmap_parse_32_le; | |
753 | map->format.parse_inplace = regmap_parse_32_le_inplace; | |
754 | break; | |
141eba2e SW |
755 | case REGMAP_ENDIAN_NATIVE: |
756 | map->format.format_val = regmap_format_32_native; | |
757 | map->format.parse_val = regmap_parse_32_native; | |
758 | break; | |
759 | default: | |
760 | goto err_map; | |
761 | } | |
7d5e525b | 762 | break; |
b83a313b MB |
763 | } |
764 | ||
141eba2e SW |
765 | if (map->format.format_write) { |
766 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
767 | (val_endian != REGMAP_ENDIAN_BIG)) | |
768 | goto err_map; | |
7a647614 | 769 | map->use_single_rw = true; |
141eba2e | 770 | } |
7a647614 | 771 | |
b83a313b MB |
772 | if (!map->format.format_write && |
773 | !(map->format.format_reg && map->format.format_val)) | |
774 | goto err_map; | |
775 | ||
82159ba8 | 776 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
777 | if (map->work_buf == NULL) { |
778 | ret = -ENOMEM; | |
5204f5e3 | 779 | goto err_map; |
b83a313b MB |
780 | } |
781 | ||
d2a5884a AS |
782 | if (map->format.format_write) { |
783 | map->defer_caching = false; | |
07c320dc | 784 | map->reg_write = _regmap_bus_formatted_write; |
d2a5884a AS |
785 | } else if (map->format.format_val) { |
786 | map->defer_caching = true; | |
07c320dc | 787 | map->reg_write = _regmap_bus_raw_write; |
d2a5884a AS |
788 | } |
789 | ||
790 | skip_format_initialization: | |
07c320dc | 791 | |
6863ca62 | 792 | map->range_tree = RB_ROOT; |
e3549cd0 | 793 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
794 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
795 | struct regmap_range_node *new; | |
796 | ||
797 | /* Sanity check */ | |
061adc06 MB |
798 | if (range_cfg->range_max < range_cfg->range_min) { |
799 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
800 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 801 | goto err_range; |
061adc06 MB |
802 | } |
803 | ||
804 | if (range_cfg->range_max > map->max_register) { | |
805 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
806 | range_cfg->range_max, map->max_register); | |
807 | goto err_range; | |
808 | } | |
809 | ||
810 | if (range_cfg->selector_reg > map->max_register) { | |
811 | dev_err(map->dev, | |
812 | "Invalid range %d: selector out of map\n", i); | |
813 | goto err_range; | |
814 | } | |
815 | ||
816 | if (range_cfg->window_len == 0) { | |
817 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
818 | i); | |
819 | goto err_range; | |
820 | } | |
6863ca62 KG |
821 | |
822 | /* Make sure, that this register range has no selector | |
823 | or data window within its boundary */ | |
e3549cd0 | 824 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
825 | unsigned sel_reg = config->ranges[j].selector_reg; |
826 | unsigned win_min = config->ranges[j].window_start; | |
827 | unsigned win_max = win_min + | |
828 | config->ranges[j].window_len - 1; | |
829 | ||
f161d220 PZ |
830 | /* Allow data window inside its own virtual range */ |
831 | if (j == i) | |
832 | continue; | |
833 | ||
6863ca62 KG |
834 | if (range_cfg->range_min <= sel_reg && |
835 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
836 | dev_err(map->dev, |
837 | "Range %d: selector for %d in window\n", | |
838 | i, j); | |
6863ca62 KG |
839 | goto err_range; |
840 | } | |
841 | ||
842 | if (!(win_max < range_cfg->range_min || | |
843 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
844 | dev_err(map->dev, |
845 | "Range %d: window for %d in window\n", | |
846 | i, j); | |
6863ca62 KG |
847 | goto err_range; |
848 | } | |
849 | } | |
850 | ||
851 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
852 | if (new == NULL) { | |
853 | ret = -ENOMEM; | |
854 | goto err_range; | |
855 | } | |
856 | ||
4b020b3f | 857 | new->map = map; |
d058bb49 | 858 | new->name = range_cfg->name; |
6863ca62 KG |
859 | new->range_min = range_cfg->range_min; |
860 | new->range_max = range_cfg->range_max; | |
861 | new->selector_reg = range_cfg->selector_reg; | |
862 | new->selector_mask = range_cfg->selector_mask; | |
863 | new->selector_shift = range_cfg->selector_shift; | |
864 | new->window_start = range_cfg->window_start; | |
865 | new->window_len = range_cfg->window_len; | |
866 | ||
53e87f88 | 867 | if (!_regmap_range_add(map, new)) { |
061adc06 | 868 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
869 | kfree(new); |
870 | goto err_range; | |
871 | } | |
872 | ||
873 | if (map->selector_work_buf == NULL) { | |
874 | map->selector_work_buf = | |
875 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
876 | if (map->selector_work_buf == NULL) { | |
877 | ret = -ENOMEM; | |
878 | goto err_range; | |
879 | } | |
880 | } | |
881 | } | |
052d2cd1 | 882 | |
e5e3b8ab | 883 | ret = regcache_init(map, config); |
0ff3e62f | 884 | if (ret != 0) |
6863ca62 KG |
885 | goto err_range; |
886 | ||
a7a037c8 | 887 | if (dev) { |
6cfec04b MS |
888 | ret = regmap_attach_dev(dev, map, config); |
889 | if (ret != 0) | |
890 | goto err_regcache; | |
a7a037c8 | 891 | } |
72b39f6f | 892 | |
b83a313b MB |
893 | return map; |
894 | ||
6cfec04b | 895 | err_regcache: |
72b39f6f | 896 | regcache_exit(map); |
6863ca62 KG |
897 | err_range: |
898 | regmap_range_exit(map); | |
58072cbf | 899 | kfree(map->work_buf); |
b83a313b MB |
900 | err_map: |
901 | kfree(map); | |
902 | err: | |
903 | return ERR_PTR(ret); | |
904 | } | |
905 | EXPORT_SYMBOL_GPL(regmap_init); | |
906 | ||
c0eb4676 MB |
907 | static void devm_regmap_release(struct device *dev, void *res) |
908 | { | |
909 | regmap_exit(*(struct regmap **)res); | |
910 | } | |
911 | ||
912 | /** | |
913 | * devm_regmap_init(): Initialise managed register map | |
914 | * | |
915 | * @dev: Device that will be interacted with | |
916 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 917 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
918 | * @config: Configuration for register map |
919 | * | |
920 | * The return value will be an ERR_PTR() on error or a valid pointer | |
921 | * to a struct regmap. This function should generally not be called | |
922 | * directly, it should be called by bus-specific init functions. The | |
923 | * map will be automatically freed by the device management code. | |
924 | */ | |
925 | struct regmap *devm_regmap_init(struct device *dev, | |
926 | const struct regmap_bus *bus, | |
0135bbcc | 927 | void *bus_context, |
c0eb4676 MB |
928 | const struct regmap_config *config) |
929 | { | |
930 | struct regmap **ptr, *regmap; | |
931 | ||
932 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
933 | if (!ptr) | |
934 | return ERR_PTR(-ENOMEM); | |
935 | ||
0135bbcc | 936 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
937 | if (!IS_ERR(regmap)) { |
938 | *ptr = regmap; | |
939 | devres_add(dev, ptr); | |
940 | } else { | |
941 | devres_free(ptr); | |
942 | } | |
943 | ||
944 | return regmap; | |
945 | } | |
946 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
947 | ||
67252287 SK |
948 | static void regmap_field_init(struct regmap_field *rm_field, |
949 | struct regmap *regmap, struct reg_field reg_field) | |
950 | { | |
67252287 SK |
951 | rm_field->regmap = regmap; |
952 | rm_field->reg = reg_field.reg; | |
953 | rm_field->shift = reg_field.lsb; | |
921cc294 | 954 | rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb); |
a0102375 KM |
955 | rm_field->id_size = reg_field.id_size; |
956 | rm_field->id_offset = reg_field.id_offset; | |
67252287 SK |
957 | } |
958 | ||
959 | /** | |
960 | * devm_regmap_field_alloc(): Allocate and initialise a register field | |
961 | * in a register map. | |
962 | * | |
963 | * @dev: Device that will be interacted with | |
964 | * @regmap: regmap bank in which this register field is located. | |
965 | * @reg_field: Register field with in the bank. | |
966 | * | |
967 | * The return value will be an ERR_PTR() on error or a valid pointer | |
968 | * to a struct regmap_field. The regmap_field will be automatically freed | |
969 | * by the device management code. | |
970 | */ | |
971 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, | |
972 | struct regmap *regmap, struct reg_field reg_field) | |
973 | { | |
974 | struct regmap_field *rm_field = devm_kzalloc(dev, | |
975 | sizeof(*rm_field), GFP_KERNEL); | |
976 | if (!rm_field) | |
977 | return ERR_PTR(-ENOMEM); | |
978 | ||
979 | regmap_field_init(rm_field, regmap, reg_field); | |
980 | ||
981 | return rm_field; | |
982 | ||
983 | } | |
984 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); | |
985 | ||
986 | /** | |
987 | * devm_regmap_field_free(): Free register field allocated using | |
988 | * devm_regmap_field_alloc. Usally drivers need not call this function, | |
989 | * as the memory allocated via devm will be freed as per device-driver | |
990 | * life-cyle. | |
991 | * | |
992 | * @dev: Device that will be interacted with | |
993 | * @field: regmap field which should be freed. | |
994 | */ | |
995 | void devm_regmap_field_free(struct device *dev, | |
996 | struct regmap_field *field) | |
997 | { | |
998 | devm_kfree(dev, field); | |
999 | } | |
1000 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); | |
1001 | ||
1002 | /** | |
1003 | * regmap_field_alloc(): Allocate and initialise a register field | |
1004 | * in a register map. | |
1005 | * | |
1006 | * @regmap: regmap bank in which this register field is located. | |
1007 | * @reg_field: Register field with in the bank. | |
1008 | * | |
1009 | * The return value will be an ERR_PTR() on error or a valid pointer | |
1010 | * to a struct regmap_field. The regmap_field should be freed by the | |
1011 | * user once its finished working with it using regmap_field_free(). | |
1012 | */ | |
1013 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, | |
1014 | struct reg_field reg_field) | |
1015 | { | |
1016 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); | |
1017 | ||
1018 | if (!rm_field) | |
1019 | return ERR_PTR(-ENOMEM); | |
1020 | ||
1021 | regmap_field_init(rm_field, regmap, reg_field); | |
1022 | ||
1023 | return rm_field; | |
1024 | } | |
1025 | EXPORT_SYMBOL_GPL(regmap_field_alloc); | |
1026 | ||
1027 | /** | |
1028 | * regmap_field_free(): Free register field allocated using regmap_field_alloc | |
1029 | * | |
1030 | * @field: regmap field which should be freed. | |
1031 | */ | |
1032 | void regmap_field_free(struct regmap_field *field) | |
1033 | { | |
1034 | kfree(field); | |
1035 | } | |
1036 | EXPORT_SYMBOL_GPL(regmap_field_free); | |
1037 | ||
bf315173 MB |
1038 | /** |
1039 | * regmap_reinit_cache(): Reinitialise the current register cache | |
1040 | * | |
1041 | * @map: Register map to operate on. | |
1042 | * @config: New configuration. Only the cache data will be used. | |
1043 | * | |
1044 | * Discard any existing register cache for the map and initialize a | |
1045 | * new cache. This can be used to restore the cache to defaults or to | |
1046 | * update the cache configuration to reflect runtime discovery of the | |
1047 | * hardware. | |
4d879514 DP |
1048 | * |
1049 | * No explicit locking is done here, the user needs to ensure that | |
1050 | * this function will not race with other calls to regmap. | |
bf315173 MB |
1051 | */ |
1052 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
1053 | { | |
bf315173 | 1054 | regcache_exit(map); |
a24f64a6 | 1055 | regmap_debugfs_exit(map); |
bf315173 MB |
1056 | |
1057 | map->max_register = config->max_register; | |
1058 | map->writeable_reg = config->writeable_reg; | |
1059 | map->readable_reg = config->readable_reg; | |
1060 | map->volatile_reg = config->volatile_reg; | |
1061 | map->precious_reg = config->precious_reg; | |
1062 | map->cache_type = config->cache_type; | |
1063 | ||
d3c242e1 | 1064 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 1065 | |
421e8d2d MB |
1066 | map->cache_bypass = false; |
1067 | map->cache_only = false; | |
1068 | ||
4d879514 | 1069 | return regcache_init(map, config); |
bf315173 | 1070 | } |
752a6a5f | 1071 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 1072 | |
b83a313b MB |
1073 | /** |
1074 | * regmap_exit(): Free a previously allocated register map | |
1075 | */ | |
1076 | void regmap_exit(struct regmap *map) | |
1077 | { | |
7e09a979 MB |
1078 | struct regmap_async *async; |
1079 | ||
5d1729e7 | 1080 | regcache_exit(map); |
31244e39 | 1081 | regmap_debugfs_exit(map); |
6863ca62 | 1082 | regmap_range_exit(map); |
d2a5884a | 1083 | if (map->bus && map->bus->free_context) |
0135bbcc | 1084 | map->bus->free_context(map->bus_context); |
b83a313b | 1085 | kfree(map->work_buf); |
7e09a979 MB |
1086 | while (!list_empty(&map->async_free)) { |
1087 | async = list_first_entry_or_null(&map->async_free, | |
1088 | struct regmap_async, | |
1089 | list); | |
1090 | list_del(&async->list); | |
1091 | kfree(async->work_buf); | |
1092 | kfree(async); | |
1093 | } | |
b83a313b MB |
1094 | kfree(map); |
1095 | } | |
1096 | EXPORT_SYMBOL_GPL(regmap_exit); | |
1097 | ||
72b39f6f MB |
1098 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
1099 | { | |
1100 | struct regmap **r = res; | |
1101 | if (!r || !*r) { | |
1102 | WARN_ON(!r || !*r); | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | /* If the user didn't specify a name match any */ | |
1107 | if (data) | |
1108 | return (*r)->name == data; | |
1109 | else | |
1110 | return 1; | |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
1115 | * | |
1116 | * @dev: Device to retrieve the map for | |
1117 | * @name: Optional name for the register map, usually NULL. | |
1118 | * | |
1119 | * Returns the regmap for the device if one is present, or NULL. If | |
1120 | * name is specified then it must match the name specified when | |
1121 | * registering the device, if it is NULL then the first regmap found | |
1122 | * will be used. Devices with multiple register maps are very rare, | |
1123 | * generic code should normally not need to specify a name. | |
1124 | */ | |
1125 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
1126 | { | |
1127 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
1128 | dev_get_regmap_match, (void *)name); | |
1129 | ||
1130 | if (!r) | |
1131 | return NULL; | |
1132 | return *r; | |
1133 | } | |
1134 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
1135 | ||
8d7d3972 TT |
1136 | /** |
1137 | * regmap_get_device(): Obtain the device from a regmap | |
1138 | * | |
1139 | * @map: Register map to operate on. | |
1140 | * | |
1141 | * Returns the underlying device that the regmap has been created for. | |
1142 | */ | |
1143 | struct device *regmap_get_device(struct regmap *map) | |
1144 | { | |
1145 | return map->dev; | |
1146 | } | |
fa2fbe4a | 1147 | EXPORT_SYMBOL_GPL(regmap_get_device); |
8d7d3972 | 1148 | |
6863ca62 | 1149 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 1150 | struct regmap_range_node *range, |
6863ca62 KG |
1151 | unsigned int val_num) |
1152 | { | |
6863ca62 KG |
1153 | void *orig_work_buf; |
1154 | unsigned int win_offset; | |
1155 | unsigned int win_page; | |
1156 | bool page_chg; | |
1157 | int ret; | |
1158 | ||
98bc7dfd MB |
1159 | win_offset = (*reg - range->range_min) % range->window_len; |
1160 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 1161 | |
98bc7dfd MB |
1162 | if (val_num > 1) { |
1163 | /* Bulk write shouldn't cross range boundary */ | |
1164 | if (*reg + val_num - 1 > range->range_max) | |
1165 | return -EINVAL; | |
6863ca62 | 1166 | |
98bc7dfd MB |
1167 | /* ... or single page boundary */ |
1168 | if (val_num > range->window_len - win_offset) | |
1169 | return -EINVAL; | |
1170 | } | |
6863ca62 | 1171 | |
98bc7dfd MB |
1172 | /* It is possible to have selector register inside data window. |
1173 | In that case, selector register is located on every page and | |
1174 | it needs no page switching, when accessed alone. */ | |
1175 | if (val_num > 1 || | |
1176 | range->window_start + win_offset != range->selector_reg) { | |
1177 | /* Use separate work_buf during page switching */ | |
1178 | orig_work_buf = map->work_buf; | |
1179 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 1180 | |
98bc7dfd MB |
1181 | ret = _regmap_update_bits(map, range->selector_reg, |
1182 | range->selector_mask, | |
1183 | win_page << range->selector_shift, | |
1184 | &page_chg); | |
632a5b01 | 1185 | |
98bc7dfd | 1186 | map->work_buf = orig_work_buf; |
6863ca62 | 1187 | |
0ff3e62f | 1188 | if (ret != 0) |
98bc7dfd | 1189 | return ret; |
6863ca62 KG |
1190 | } |
1191 | ||
98bc7dfd MB |
1192 | *reg = range->window_start + win_offset; |
1193 | ||
6863ca62 KG |
1194 | return 0; |
1195 | } | |
1196 | ||
584de329 | 1197 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
0a819809 | 1198 | const void *val, size_t val_len) |
b83a313b | 1199 | { |
98bc7dfd | 1200 | struct regmap_range_node *range; |
0d509f2b | 1201 | unsigned long flags; |
6f306441 | 1202 | u8 *u8 = map->work_buf; |
0d509f2b MB |
1203 | void *work_val = map->work_buf + map->format.reg_bytes + |
1204 | map->format.pad_bytes; | |
b83a313b MB |
1205 | void *buf; |
1206 | int ret = -ENOTSUPP; | |
1207 | size_t len; | |
73304781 MB |
1208 | int i; |
1209 | ||
f1b5c5c3 | 1210 | WARN_ON(!map->bus); |
d2a5884a | 1211 | |
73304781 MB |
1212 | /* Check for unwritable registers before we start */ |
1213 | if (map->writeable_reg) | |
1214 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
1215 | if (!map->writeable_reg(map->dev, |
1216 | reg + (i * map->reg_stride))) | |
73304781 | 1217 | return -EINVAL; |
b83a313b | 1218 | |
c9157198 LD |
1219 | if (!map->cache_bypass && map->format.parse_val) { |
1220 | unsigned int ival; | |
1221 | int val_bytes = map->format.val_bytes; | |
1222 | for (i = 0; i < val_len / val_bytes; i++) { | |
5a08d156 | 1223 | ival = map->format.parse_val(val + (i * val_bytes)); |
f01ee60f SW |
1224 | ret = regcache_write(map, reg + (i * map->reg_stride), |
1225 | ival); | |
c9157198 LD |
1226 | if (ret) { |
1227 | dev_err(map->dev, | |
6d04b8ac | 1228 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
1229 | reg + i, ret); |
1230 | return ret; | |
1231 | } | |
1232 | } | |
1233 | if (map->cache_only) { | |
1234 | map->cache_dirty = true; | |
1235 | return 0; | |
1236 | } | |
1237 | } | |
1238 | ||
98bc7dfd MB |
1239 | range = _regmap_range_lookup(map, reg); |
1240 | if (range) { | |
8a2ceac6 MB |
1241 | int val_num = val_len / map->format.val_bytes; |
1242 | int win_offset = (reg - range->range_min) % range->window_len; | |
1243 | int win_residue = range->window_len - win_offset; | |
1244 | ||
1245 | /* If the write goes beyond the end of the window split it */ | |
1246 | while (val_num > win_residue) { | |
1a61cfe3 | 1247 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
1248 | win_residue, val_len / map->format.val_bytes); |
1249 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0a819809 | 1250 | map->format.val_bytes); |
8a2ceac6 MB |
1251 | if (ret != 0) |
1252 | return ret; | |
1253 | ||
1254 | reg += win_residue; | |
1255 | val_num -= win_residue; | |
1256 | val += win_residue * map->format.val_bytes; | |
1257 | val_len -= win_residue * map->format.val_bytes; | |
1258 | ||
1259 | win_offset = (reg - range->range_min) % | |
1260 | range->window_len; | |
1261 | win_residue = range->window_len - win_offset; | |
1262 | } | |
1263 | ||
1264 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 1265 | if (ret != 0) |
98bc7dfd MB |
1266 | return ret; |
1267 | } | |
6863ca62 | 1268 | |
d939fb9a | 1269 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 1270 | |
6f306441 LPC |
1271 | u8[0] |= map->write_flag_mask; |
1272 | ||
651e013e MB |
1273 | /* |
1274 | * Essentially all I/O mechanisms will be faster with a single | |
1275 | * buffer to write. Since register syncs often generate raw | |
1276 | * writes of single registers optimise that case. | |
1277 | */ | |
1278 | if (val != work_val && val_len == map->format.val_bytes) { | |
1279 | memcpy(work_val, val, map->format.val_bytes); | |
1280 | val = work_val; | |
1281 | } | |
1282 | ||
0a819809 | 1283 | if (map->async && map->bus->async_write) { |
7e09a979 | 1284 | struct regmap_async *async; |
0d509f2b | 1285 | |
c6b570d9 | 1286 | trace_regmap_async_write_start(map, reg, val_len); |
fe7d4ccd | 1287 | |
7e09a979 MB |
1288 | spin_lock_irqsave(&map->async_lock, flags); |
1289 | async = list_first_entry_or_null(&map->async_free, | |
1290 | struct regmap_async, | |
1291 | list); | |
1292 | if (async) | |
1293 | list_del(&async->list); | |
1294 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1295 | ||
1296 | if (!async) { | |
1297 | async = map->bus->async_alloc(); | |
1298 | if (!async) | |
1299 | return -ENOMEM; | |
1300 | ||
1301 | async->work_buf = kzalloc(map->format.buf_size, | |
1302 | GFP_KERNEL | GFP_DMA); | |
1303 | if (!async->work_buf) { | |
1304 | kfree(async); | |
1305 | return -ENOMEM; | |
1306 | } | |
0d509f2b MB |
1307 | } |
1308 | ||
0d509f2b MB |
1309 | async->map = map; |
1310 | ||
1311 | /* If the caller supplied the value we can use it safely. */ | |
1312 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
1313 | map->format.reg_bytes + map->format.val_bytes); | |
0d509f2b MB |
1314 | |
1315 | spin_lock_irqsave(&map->async_lock, flags); | |
1316 | list_add_tail(&async->list, &map->async_list); | |
1317 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1318 | ||
04c50ccf MB |
1319 | if (val != work_val) |
1320 | ret = map->bus->async_write(map->bus_context, | |
1321 | async->work_buf, | |
1322 | map->format.reg_bytes + | |
1323 | map->format.pad_bytes, | |
1324 | val, val_len, async); | |
1325 | else | |
1326 | ret = map->bus->async_write(map->bus_context, | |
1327 | async->work_buf, | |
1328 | map->format.reg_bytes + | |
1329 | map->format.pad_bytes + | |
1330 | val_len, NULL, 0, async); | |
0d509f2b MB |
1331 | |
1332 | if (ret != 0) { | |
1333 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1334 | ret); | |
1335 | ||
1336 | spin_lock_irqsave(&map->async_lock, flags); | |
7e09a979 | 1337 | list_move(&async->list, &map->async_free); |
0d509f2b | 1338 | spin_unlock_irqrestore(&map->async_lock, flags); |
0d509f2b | 1339 | } |
f951b658 MB |
1340 | |
1341 | return ret; | |
0d509f2b MB |
1342 | } |
1343 | ||
c6b570d9 | 1344 | trace_regmap_hw_write_start(map, reg, val_len / map->format.val_bytes); |
fb2736bb | 1345 | |
2547e201 MB |
1346 | /* If we're doing a single register write we can probably just |
1347 | * send the work_buf directly, otherwise try to do a gather | |
1348 | * write. | |
1349 | */ | |
0d509f2b | 1350 | if (val == work_val) |
0135bbcc | 1351 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1352 | map->format.reg_bytes + |
1353 | map->format.pad_bytes + | |
1354 | val_len); | |
2547e201 | 1355 | else if (map->bus->gather_write) |
0135bbcc | 1356 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1357 | map->format.reg_bytes + |
1358 | map->format.pad_bytes, | |
b83a313b MB |
1359 | val, val_len); |
1360 | ||
2547e201 | 1361 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1362 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1363 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1364 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1365 | if (!buf) |
1366 | return -ENOMEM; | |
1367 | ||
1368 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1369 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1370 | val, val_len); | |
0135bbcc | 1371 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1372 | |
1373 | kfree(buf); | |
1374 | } | |
1375 | ||
c6b570d9 | 1376 | trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes); |
fb2736bb | 1377 | |
b83a313b MB |
1378 | return ret; |
1379 | } | |
1380 | ||
221ad7f2 MB |
1381 | /** |
1382 | * regmap_can_raw_write - Test if regmap_raw_write() is supported | |
1383 | * | |
1384 | * @map: Map to check. | |
1385 | */ | |
1386 | bool regmap_can_raw_write(struct regmap *map) | |
1387 | { | |
1388 | return map->bus && map->format.format_val && map->format.format_reg; | |
1389 | } | |
1390 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); | |
1391 | ||
07c320dc AS |
1392 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1393 | unsigned int val) | |
1394 | { | |
1395 | int ret; | |
1396 | struct regmap_range_node *range; | |
1397 | struct regmap *map = context; | |
1398 | ||
f1b5c5c3 | 1399 | WARN_ON(!map->bus || !map->format.format_write); |
07c320dc AS |
1400 | |
1401 | range = _regmap_range_lookup(map, reg); | |
1402 | if (range) { | |
1403 | ret = _regmap_select_page(map, ®, range, 1); | |
1404 | if (ret != 0) | |
1405 | return ret; | |
1406 | } | |
1407 | ||
1408 | map->format.format_write(map, reg, val); | |
1409 | ||
c6b570d9 | 1410 | trace_regmap_hw_write_start(map, reg, 1); |
07c320dc AS |
1411 | |
1412 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1413 | map->format.buf_size); | |
1414 | ||
c6b570d9 | 1415 | trace_regmap_hw_write_done(map, reg, 1); |
07c320dc AS |
1416 | |
1417 | return ret; | |
1418 | } | |
1419 | ||
3ac17037 BB |
1420 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
1421 | unsigned int val) | |
1422 | { | |
1423 | struct regmap *map = context; | |
1424 | ||
1425 | return map->bus->reg_write(map->bus_context, reg, val); | |
1426 | } | |
1427 | ||
07c320dc AS |
1428 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
1429 | unsigned int val) | |
1430 | { | |
1431 | struct regmap *map = context; | |
1432 | ||
f1b5c5c3 | 1433 | WARN_ON(!map->bus || !map->format.format_val); |
07c320dc AS |
1434 | |
1435 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1436 | + map->format.pad_bytes, val, 0); | |
1437 | return _regmap_raw_write(map, reg, | |
1438 | map->work_buf + | |
1439 | map->format.reg_bytes + | |
1440 | map->format.pad_bytes, | |
0a819809 | 1441 | map->format.val_bytes); |
07c320dc AS |
1442 | } |
1443 | ||
d2a5884a AS |
1444 | static inline void *_regmap_map_get_context(struct regmap *map) |
1445 | { | |
1446 | return (map->bus) ? map : map->bus_context; | |
1447 | } | |
1448 | ||
4d2dc095 DP |
1449 | int _regmap_write(struct regmap *map, unsigned int reg, |
1450 | unsigned int val) | |
b83a313b | 1451 | { |
fb2736bb | 1452 | int ret; |
d2a5884a | 1453 | void *context = _regmap_map_get_context(map); |
b83a313b | 1454 | |
515f2261 IN |
1455 | if (!regmap_writeable(map, reg)) |
1456 | return -EIO; | |
1457 | ||
d2a5884a | 1458 | if (!map->cache_bypass && !map->defer_caching) { |
5d1729e7 DP |
1459 | ret = regcache_write(map, reg, val); |
1460 | if (ret != 0) | |
1461 | return ret; | |
8ae0d7e8 MB |
1462 | if (map->cache_only) { |
1463 | map->cache_dirty = true; | |
5d1729e7 | 1464 | return 0; |
8ae0d7e8 | 1465 | } |
5d1729e7 DP |
1466 | } |
1467 | ||
1044c180 | 1468 | #ifdef LOG_DEVICE |
5336be84 | 1469 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
1044c180 MB |
1470 | dev_info(map->dev, "%x <= %x\n", reg, val); |
1471 | #endif | |
1472 | ||
c6b570d9 | 1473 | trace_regmap_reg_write(map, reg, val); |
fb2736bb | 1474 | |
d2a5884a | 1475 | return map->reg_write(context, reg, val); |
b83a313b MB |
1476 | } |
1477 | ||
1478 | /** | |
1479 | * regmap_write(): Write a value to a single register | |
1480 | * | |
1481 | * @map: Register map to write to | |
1482 | * @reg: Register to write to | |
1483 | * @val: Value to be written | |
1484 | * | |
1485 | * A value of zero will be returned on success, a negative errno will | |
1486 | * be returned in error cases. | |
1487 | */ | |
1488 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1489 | { | |
1490 | int ret; | |
1491 | ||
f01ee60f SW |
1492 | if (reg % map->reg_stride) |
1493 | return -EINVAL; | |
1494 | ||
0d4529c5 | 1495 | map->lock(map->lock_arg); |
b83a313b MB |
1496 | |
1497 | ret = _regmap_write(map, reg, val); | |
1498 | ||
0d4529c5 | 1499 | map->unlock(map->lock_arg); |
b83a313b MB |
1500 | |
1501 | return ret; | |
1502 | } | |
1503 | EXPORT_SYMBOL_GPL(regmap_write); | |
1504 | ||
915f441b MB |
1505 | /** |
1506 | * regmap_write_async(): Write a value to a single register asynchronously | |
1507 | * | |
1508 | * @map: Register map to write to | |
1509 | * @reg: Register to write to | |
1510 | * @val: Value to be written | |
1511 | * | |
1512 | * A value of zero will be returned on success, a negative errno will | |
1513 | * be returned in error cases. | |
1514 | */ | |
1515 | int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) | |
1516 | { | |
1517 | int ret; | |
1518 | ||
1519 | if (reg % map->reg_stride) | |
1520 | return -EINVAL; | |
1521 | ||
1522 | map->lock(map->lock_arg); | |
1523 | ||
1524 | map->async = true; | |
1525 | ||
1526 | ret = _regmap_write(map, reg, val); | |
1527 | ||
1528 | map->async = false; | |
1529 | ||
1530 | map->unlock(map->lock_arg); | |
1531 | ||
1532 | return ret; | |
1533 | } | |
1534 | EXPORT_SYMBOL_GPL(regmap_write_async); | |
1535 | ||
b83a313b MB |
1536 | /** |
1537 | * regmap_raw_write(): Write raw values to one or more registers | |
1538 | * | |
1539 | * @map: Register map to write to | |
1540 | * @reg: Initial register to write to | |
1541 | * @val: Block of data to be written, laid out for direct transmission to the | |
1542 | * device | |
1543 | * @val_len: Length of data pointed to by val. | |
1544 | * | |
1545 | * This function is intended to be used for things like firmware | |
1546 | * download where a large block of data needs to be transferred to the | |
1547 | * device. No formatting will be done on the data provided. | |
1548 | * | |
1549 | * A value of zero will be returned on success, a negative errno will | |
1550 | * be returned in error cases. | |
1551 | */ | |
1552 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1553 | const void *val, size_t val_len) | |
1554 | { | |
1555 | int ret; | |
1556 | ||
221ad7f2 | 1557 | if (!regmap_can_raw_write(map)) |
d2a5884a | 1558 | return -EINVAL; |
851960ba SW |
1559 | if (val_len % map->format.val_bytes) |
1560 | return -EINVAL; | |
1561 | ||
0d4529c5 | 1562 | map->lock(map->lock_arg); |
b83a313b | 1563 | |
0a819809 | 1564 | ret = _regmap_raw_write(map, reg, val, val_len); |
b83a313b | 1565 | |
0d4529c5 | 1566 | map->unlock(map->lock_arg); |
b83a313b MB |
1567 | |
1568 | return ret; | |
1569 | } | |
1570 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1571 | ||
67252287 SK |
1572 | /** |
1573 | * regmap_field_write(): Write a value to a single register field | |
1574 | * | |
1575 | * @field: Register field to write to | |
1576 | * @val: Value to be written | |
1577 | * | |
1578 | * A value of zero will be returned on success, a negative errno will | |
1579 | * be returned in error cases. | |
1580 | */ | |
1581 | int regmap_field_write(struct regmap_field *field, unsigned int val) | |
1582 | { | |
1583 | return regmap_update_bits(field->regmap, field->reg, | |
1584 | field->mask, val << field->shift); | |
1585 | } | |
1586 | EXPORT_SYMBOL_GPL(regmap_field_write); | |
1587 | ||
fdf20029 KM |
1588 | /** |
1589 | * regmap_field_update_bits(): Perform a read/modify/write cycle | |
1590 | * on the register field | |
1591 | * | |
1592 | * @field: Register field to write to | |
1593 | * @mask: Bitmask to change | |
1594 | * @val: Value to be written | |
1595 | * | |
1596 | * A value of zero will be returned on success, a negative errno will | |
1597 | * be returned in error cases. | |
1598 | */ | |
1599 | int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val) | |
1600 | { | |
1601 | mask = (mask << field->shift) & field->mask; | |
1602 | ||
1603 | return regmap_update_bits(field->regmap, field->reg, | |
1604 | mask, val << field->shift); | |
1605 | } | |
1606 | EXPORT_SYMBOL_GPL(regmap_field_update_bits); | |
1607 | ||
a0102375 KM |
1608 | /** |
1609 | * regmap_fields_write(): Write a value to a single register field with port ID | |
1610 | * | |
1611 | * @field: Register field to write to | |
1612 | * @id: port ID | |
1613 | * @val: Value to be written | |
1614 | * | |
1615 | * A value of zero will be returned on success, a negative errno will | |
1616 | * be returned in error cases. | |
1617 | */ | |
1618 | int regmap_fields_write(struct regmap_field *field, unsigned int id, | |
1619 | unsigned int val) | |
1620 | { | |
1621 | if (id >= field->id_size) | |
1622 | return -EINVAL; | |
1623 | ||
1624 | return regmap_update_bits(field->regmap, | |
1625 | field->reg + (field->id_offset * id), | |
1626 | field->mask, val << field->shift); | |
1627 | } | |
1628 | EXPORT_SYMBOL_GPL(regmap_fields_write); | |
1629 | ||
1630 | /** | |
1631 | * regmap_fields_update_bits(): Perform a read/modify/write cycle | |
1632 | * on the register field | |
1633 | * | |
1634 | * @field: Register field to write to | |
1635 | * @id: port ID | |
1636 | * @mask: Bitmask to change | |
1637 | * @val: Value to be written | |
1638 | * | |
1639 | * A value of zero will be returned on success, a negative errno will | |
1640 | * be returned in error cases. | |
1641 | */ | |
1642 | int regmap_fields_update_bits(struct regmap_field *field, unsigned int id, | |
1643 | unsigned int mask, unsigned int val) | |
1644 | { | |
1645 | if (id >= field->id_size) | |
1646 | return -EINVAL; | |
1647 | ||
1648 | mask = (mask << field->shift) & field->mask; | |
1649 | ||
1650 | return regmap_update_bits(field->regmap, | |
1651 | field->reg + (field->id_offset * id), | |
1652 | mask, val << field->shift); | |
1653 | } | |
1654 | EXPORT_SYMBOL_GPL(regmap_fields_update_bits); | |
1655 | ||
8eaeb219 LD |
1656 | /* |
1657 | * regmap_bulk_write(): Write multiple registers to the device | |
1658 | * | |
1659 | * @map: Register map to write to | |
1660 | * @reg: First register to be write from | |
1661 | * @val: Block of data to be written, in native register size for device | |
1662 | * @val_count: Number of registers to write | |
1663 | * | |
1664 | * This function is intended to be used for writing a large block of | |
31b35e9e | 1665 | * data to the device either in single transfer or multiple transfer. |
8eaeb219 LD |
1666 | * |
1667 | * A value of zero will be returned on success, a negative errno will | |
1668 | * be returned in error cases. | |
1669 | */ | |
1670 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1671 | size_t val_count) | |
1672 | { | |
1673 | int ret = 0, i; | |
1674 | size_t val_bytes = map->format.val_bytes; | |
8eaeb219 | 1675 | |
f4298360 | 1676 | if (map->bus && !map->format.parse_inplace) |
8eaeb219 | 1677 | return -EINVAL; |
f01ee60f SW |
1678 | if (reg % map->reg_stride) |
1679 | return -EINVAL; | |
8eaeb219 | 1680 | |
f4298360 SB |
1681 | /* |
1682 | * Some devices don't support bulk write, for | |
1683 | * them we have a series of single write operations. | |
1684 | */ | |
1685 | if (!map->bus || map->use_single_rw) { | |
4999e962 | 1686 | map->lock(map->lock_arg); |
f4298360 SB |
1687 | for (i = 0; i < val_count; i++) { |
1688 | unsigned int ival; | |
1689 | ||
1690 | switch (val_bytes) { | |
1691 | case 1: | |
1692 | ival = *(u8 *)(val + (i * val_bytes)); | |
1693 | break; | |
1694 | case 2: | |
1695 | ival = *(u16 *)(val + (i * val_bytes)); | |
1696 | break; | |
1697 | case 4: | |
1698 | ival = *(u32 *)(val + (i * val_bytes)); | |
1699 | break; | |
1700 | #ifdef CONFIG_64BIT | |
1701 | case 8: | |
1702 | ival = *(u64 *)(val + (i * val_bytes)); | |
1703 | break; | |
1704 | #endif | |
1705 | default: | |
1706 | ret = -EINVAL; | |
1707 | goto out; | |
1708 | } | |
8eaeb219 | 1709 | |
f4298360 SB |
1710 | ret = _regmap_write(map, reg + (i * map->reg_stride), |
1711 | ival); | |
1712 | if (ret != 0) | |
1713 | goto out; | |
1714 | } | |
4999e962 TI |
1715 | out: |
1716 | map->unlock(map->lock_arg); | |
8eaeb219 | 1717 | } else { |
f4298360 SB |
1718 | void *wval; |
1719 | ||
d6b41cb0 XL |
1720 | if (!val_count) |
1721 | return -EINVAL; | |
1722 | ||
8eaeb219 LD |
1723 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); |
1724 | if (!wval) { | |
8eaeb219 | 1725 | dev_err(map->dev, "Error in memory allocation\n"); |
4999e962 | 1726 | return -ENOMEM; |
8eaeb219 LD |
1727 | } |
1728 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1729 | map->format.parse_inplace(wval + i); |
f4298360 | 1730 | |
4999e962 | 1731 | map->lock(map->lock_arg); |
0a819809 | 1732 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); |
4999e962 | 1733 | map->unlock(map->lock_arg); |
8eaeb219 | 1734 | |
8eaeb219 | 1735 | kfree(wval); |
f4298360 | 1736 | } |
8eaeb219 LD |
1737 | return ret; |
1738 | } | |
1739 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1740 | ||
e894c3f4 OAO |
1741 | /* |
1742 | * _regmap_raw_multi_reg_write() | |
1743 | * | |
1744 | * the (register,newvalue) pairs in regs have not been formatted, but | |
1745 | * they are all in the same page and have been changed to being page | |
1746 | * relative. The page register has been written if that was neccessary. | |
1747 | */ | |
1748 | static int _regmap_raw_multi_reg_write(struct regmap *map, | |
1749 | const struct reg_default *regs, | |
1750 | size_t num_regs) | |
1751 | { | |
1752 | int ret; | |
1753 | void *buf; | |
1754 | int i; | |
1755 | u8 *u8; | |
1756 | size_t val_bytes = map->format.val_bytes; | |
1757 | size_t reg_bytes = map->format.reg_bytes; | |
1758 | size_t pad_bytes = map->format.pad_bytes; | |
1759 | size_t pair_size = reg_bytes + pad_bytes + val_bytes; | |
1760 | size_t len = pair_size * num_regs; | |
1761 | ||
f5727cd3 XL |
1762 | if (!len) |
1763 | return -EINVAL; | |
1764 | ||
e894c3f4 OAO |
1765 | buf = kzalloc(len, GFP_KERNEL); |
1766 | if (!buf) | |
1767 | return -ENOMEM; | |
1768 | ||
1769 | /* We have to linearise by hand. */ | |
1770 | ||
1771 | u8 = buf; | |
1772 | ||
1773 | for (i = 0; i < num_regs; i++) { | |
1774 | int reg = regs[i].reg; | |
1775 | int val = regs[i].def; | |
c6b570d9 | 1776 | trace_regmap_hw_write_start(map, reg, 1); |
e894c3f4 OAO |
1777 | map->format.format_reg(u8, reg, map->reg_shift); |
1778 | u8 += reg_bytes + pad_bytes; | |
1779 | map->format.format_val(u8, val, 0); | |
1780 | u8 += val_bytes; | |
1781 | } | |
1782 | u8 = buf; | |
1783 | *u8 |= map->write_flag_mask; | |
1784 | ||
1785 | ret = map->bus->write(map->bus_context, buf, len); | |
1786 | ||
1787 | kfree(buf); | |
1788 | ||
1789 | for (i = 0; i < num_regs; i++) { | |
1790 | int reg = regs[i].reg; | |
c6b570d9 | 1791 | trace_regmap_hw_write_done(map, reg, 1); |
e894c3f4 OAO |
1792 | } |
1793 | return ret; | |
1794 | } | |
1795 | ||
1796 | static unsigned int _regmap_register_page(struct regmap *map, | |
1797 | unsigned int reg, | |
1798 | struct regmap_range_node *range) | |
1799 | { | |
1800 | unsigned int win_page = (reg - range->range_min) / range->window_len; | |
1801 | ||
1802 | return win_page; | |
1803 | } | |
1804 | ||
1805 | static int _regmap_range_multi_paged_reg_write(struct regmap *map, | |
1806 | struct reg_default *regs, | |
1807 | size_t num_regs) | |
1808 | { | |
1809 | int ret; | |
1810 | int i, n; | |
1811 | struct reg_default *base; | |
b48d1398 | 1812 | unsigned int this_page = 0; |
e894c3f4 OAO |
1813 | /* |
1814 | * the set of registers are not neccessarily in order, but | |
1815 | * since the order of write must be preserved this algorithm | |
1816 | * chops the set each time the page changes | |
1817 | */ | |
1818 | base = regs; | |
1819 | for (i = 0, n = 0; i < num_regs; i++, n++) { | |
1820 | unsigned int reg = regs[i].reg; | |
1821 | struct regmap_range_node *range; | |
1822 | ||
1823 | range = _regmap_range_lookup(map, reg); | |
1824 | if (range) { | |
1825 | unsigned int win_page = _regmap_register_page(map, reg, | |
1826 | range); | |
1827 | ||
1828 | if (i == 0) | |
1829 | this_page = win_page; | |
1830 | if (win_page != this_page) { | |
1831 | this_page = win_page; | |
1832 | ret = _regmap_raw_multi_reg_write(map, base, n); | |
1833 | if (ret != 0) | |
1834 | return ret; | |
1835 | base += n; | |
1836 | n = 0; | |
1837 | } | |
1838 | ret = _regmap_select_page(map, &base[n].reg, range, 1); | |
1839 | if (ret != 0) | |
1840 | return ret; | |
1841 | } | |
1842 | } | |
1843 | if (n > 0) | |
1844 | return _regmap_raw_multi_reg_write(map, base, n); | |
1845 | return 0; | |
1846 | } | |
1847 | ||
1d5b40bc CK |
1848 | static int _regmap_multi_reg_write(struct regmap *map, |
1849 | const struct reg_default *regs, | |
e894c3f4 | 1850 | size_t num_regs) |
1d5b40bc | 1851 | { |
e894c3f4 OAO |
1852 | int i; |
1853 | int ret; | |
1854 | ||
1855 | if (!map->can_multi_write) { | |
1856 | for (i = 0; i < num_regs; i++) { | |
1857 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1858 | if (ret != 0) | |
1859 | return ret; | |
1860 | } | |
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | if (!map->format.parse_inplace) | |
1865 | return -EINVAL; | |
1866 | ||
1867 | if (map->writeable_reg) | |
1868 | for (i = 0; i < num_regs; i++) { | |
1869 | int reg = regs[i].reg; | |
1870 | if (!map->writeable_reg(map->dev, reg)) | |
1871 | return -EINVAL; | |
1872 | if (reg % map->reg_stride) | |
1873 | return -EINVAL; | |
1874 | } | |
1875 | ||
1876 | if (!map->cache_bypass) { | |
1877 | for (i = 0; i < num_regs; i++) { | |
1878 | unsigned int val = regs[i].def; | |
1879 | unsigned int reg = regs[i].reg; | |
1880 | ret = regcache_write(map, reg, val); | |
1881 | if (ret) { | |
1882 | dev_err(map->dev, | |
1883 | "Error in caching of register: %x ret: %d\n", | |
1884 | reg, ret); | |
1885 | return ret; | |
1886 | } | |
1887 | } | |
1888 | if (map->cache_only) { | |
1889 | map->cache_dirty = true; | |
1890 | return 0; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | WARN_ON(!map->bus); | |
1d5b40bc CK |
1895 | |
1896 | for (i = 0; i < num_regs; i++) { | |
e894c3f4 OAO |
1897 | unsigned int reg = regs[i].reg; |
1898 | struct regmap_range_node *range; | |
1899 | range = _regmap_range_lookup(map, reg); | |
1900 | if (range) { | |
1901 | size_t len = sizeof(struct reg_default)*num_regs; | |
1902 | struct reg_default *base = kmemdup(regs, len, | |
1903 | GFP_KERNEL); | |
1904 | if (!base) | |
1905 | return -ENOMEM; | |
1906 | ret = _regmap_range_multi_paged_reg_write(map, base, | |
1907 | num_regs); | |
1908 | kfree(base); | |
1909 | ||
1d5b40bc CK |
1910 | return ret; |
1911 | } | |
1912 | } | |
e894c3f4 | 1913 | return _regmap_raw_multi_reg_write(map, regs, num_regs); |
1d5b40bc CK |
1914 | } |
1915 | ||
e33fabd3 AO |
1916 | /* |
1917 | * regmap_multi_reg_write(): Write multiple registers to the device | |
1918 | * | |
e894c3f4 OAO |
1919 | * where the set of register,value pairs are supplied in any order, |
1920 | * possibly not all in a single range. | |
e33fabd3 AO |
1921 | * |
1922 | * @map: Register map to write to | |
1923 | * @regs: Array of structures containing register,value to be written | |
1924 | * @num_regs: Number of registers to write | |
1925 | * | |
e894c3f4 OAO |
1926 | * The 'normal' block write mode will send ultimately send data on the |
1927 | * target bus as R,V1,V2,V3,..,Vn where successively higer registers are | |
1928 | * addressed. However, this alternative block multi write mode will send | |
1929 | * the data as R1,V1,R2,V2,..,Rn,Vn on the target bus. The target device | |
1930 | * must of course support the mode. | |
e33fabd3 | 1931 | * |
e894c3f4 OAO |
1932 | * A value of zero will be returned on success, a negative errno will be |
1933 | * returned in error cases. | |
e33fabd3 | 1934 | */ |
f7e2cec0 CK |
1935 | int regmap_multi_reg_write(struct regmap *map, const struct reg_default *regs, |
1936 | int num_regs) | |
e33fabd3 | 1937 | { |
1d5b40bc | 1938 | int ret; |
e33fabd3 AO |
1939 | |
1940 | map->lock(map->lock_arg); | |
1941 | ||
1d5b40bc CK |
1942 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
1943 | ||
e33fabd3 AO |
1944 | map->unlock(map->lock_arg); |
1945 | ||
1946 | return ret; | |
1947 | } | |
1948 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write); | |
1949 | ||
1d5b40bc CK |
1950 | /* |
1951 | * regmap_multi_reg_write_bypassed(): Write multiple registers to the | |
1952 | * device but not the cache | |
1953 | * | |
e33fabd3 AO |
1954 | * where the set of register are supplied in any order |
1955 | * | |
1956 | * @map: Register map to write to | |
1957 | * @regs: Array of structures containing register,value to be written | |
1958 | * @num_regs: Number of registers to write | |
1959 | * | |
1960 | * This function is intended to be used for writing a large block of data | |
1961 | * atomically to the device in single transfer for those I2C client devices | |
1962 | * that implement this alternative block write mode. | |
1963 | * | |
1964 | * A value of zero will be returned on success, a negative errno will | |
1965 | * be returned in error cases. | |
1966 | */ | |
1d5b40bc CK |
1967 | int regmap_multi_reg_write_bypassed(struct regmap *map, |
1968 | const struct reg_default *regs, | |
1969 | int num_regs) | |
e33fabd3 | 1970 | { |
1d5b40bc CK |
1971 | int ret; |
1972 | bool bypass; | |
e33fabd3 AO |
1973 | |
1974 | map->lock(map->lock_arg); | |
1975 | ||
1d5b40bc CK |
1976 | bypass = map->cache_bypass; |
1977 | map->cache_bypass = true; | |
1978 | ||
1979 | ret = _regmap_multi_reg_write(map, regs, num_regs); | |
1980 | ||
1981 | map->cache_bypass = bypass; | |
1982 | ||
e33fabd3 AO |
1983 | map->unlock(map->lock_arg); |
1984 | ||
1985 | return ret; | |
1986 | } | |
1d5b40bc | 1987 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write_bypassed); |
e33fabd3 | 1988 | |
0d509f2b MB |
1989 | /** |
1990 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1991 | * asynchronously | |
1992 | * | |
1993 | * @map: Register map to write to | |
1994 | * @reg: Initial register to write to | |
1995 | * @val: Block of data to be written, laid out for direct transmission to the | |
1996 | * device. Must be valid until regmap_async_complete() is called. | |
1997 | * @val_len: Length of data pointed to by val. | |
1998 | * | |
1999 | * This function is intended to be used for things like firmware | |
2000 | * download where a large block of data needs to be transferred to the | |
2001 | * device. No formatting will be done on the data provided. | |
2002 | * | |
2003 | * If supported by the underlying bus the write will be scheduled | |
2004 | * asynchronously, helping maximise I/O speed on higher speed buses | |
2005 | * like SPI. regmap_async_complete() can be called to ensure that all | |
2006 | * asynchrnous writes have been completed. | |
2007 | * | |
2008 | * A value of zero will be returned on success, a negative errno will | |
2009 | * be returned in error cases. | |
2010 | */ | |
2011 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
2012 | const void *val, size_t val_len) | |
2013 | { | |
2014 | int ret; | |
2015 | ||
2016 | if (val_len % map->format.val_bytes) | |
2017 | return -EINVAL; | |
2018 | if (reg % map->reg_stride) | |
2019 | return -EINVAL; | |
2020 | ||
2021 | map->lock(map->lock_arg); | |
2022 | ||
0a819809 MB |
2023 | map->async = true; |
2024 | ||
2025 | ret = _regmap_raw_write(map, reg, val, val_len); | |
2026 | ||
2027 | map->async = false; | |
0d509f2b MB |
2028 | |
2029 | map->unlock(map->lock_arg); | |
2030 | ||
2031 | return ret; | |
2032 | } | |
2033 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
2034 | ||
b83a313b MB |
2035 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
2036 | unsigned int val_len) | |
2037 | { | |
98bc7dfd | 2038 | struct regmap_range_node *range; |
b83a313b MB |
2039 | u8 *u8 = map->work_buf; |
2040 | int ret; | |
2041 | ||
f1b5c5c3 | 2042 | WARN_ON(!map->bus); |
d2a5884a | 2043 | |
98bc7dfd MB |
2044 | range = _regmap_range_lookup(map, reg); |
2045 | if (range) { | |
2046 | ret = _regmap_select_page(map, ®, range, | |
2047 | val_len / map->format.val_bytes); | |
0ff3e62f | 2048 | if (ret != 0) |
98bc7dfd MB |
2049 | return ret; |
2050 | } | |
6863ca62 | 2051 | |
d939fb9a | 2052 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
2053 | |
2054 | /* | |
6f306441 | 2055 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
2056 | * register addresss; since it's always the high bits for all |
2057 | * current formats we can do this here rather than in | |
2058 | * formatting. This may break if we get interesting formats. | |
2059 | */ | |
6f306441 | 2060 | u8[0] |= map->read_flag_mask; |
b83a313b | 2061 | |
c6b570d9 | 2062 | trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes); |
fb2736bb | 2063 | |
0135bbcc | 2064 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 2065 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 2066 | val, val_len); |
b83a313b | 2067 | |
c6b570d9 | 2068 | trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes); |
fb2736bb MB |
2069 | |
2070 | return ret; | |
b83a313b MB |
2071 | } |
2072 | ||
3ac17037 BB |
2073 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
2074 | unsigned int *val) | |
2075 | { | |
2076 | struct regmap *map = context; | |
2077 | ||
2078 | return map->bus->reg_read(map->bus_context, reg, val); | |
2079 | } | |
2080 | ||
ad278406 AS |
2081 | static int _regmap_bus_read(void *context, unsigned int reg, |
2082 | unsigned int *val) | |
2083 | { | |
2084 | int ret; | |
2085 | struct regmap *map = context; | |
2086 | ||
2087 | if (!map->format.parse_val) | |
2088 | return -EINVAL; | |
2089 | ||
2090 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
2091 | if (ret == 0) | |
2092 | *val = map->format.parse_val(map->work_buf); | |
2093 | ||
2094 | return ret; | |
2095 | } | |
2096 | ||
b83a313b MB |
2097 | static int _regmap_read(struct regmap *map, unsigned int reg, |
2098 | unsigned int *val) | |
2099 | { | |
2100 | int ret; | |
d2a5884a AS |
2101 | void *context = _regmap_map_get_context(map); |
2102 | ||
5d1729e7 DP |
2103 | if (!map->cache_bypass) { |
2104 | ret = regcache_read(map, reg, val); | |
2105 | if (ret == 0) | |
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | if (map->cache_only) | |
2110 | return -EBUSY; | |
2111 | ||
d4807ad2 MS |
2112 | if (!regmap_readable(map, reg)) |
2113 | return -EIO; | |
2114 | ||
d2a5884a | 2115 | ret = map->reg_read(context, reg, val); |
fb2736bb | 2116 | if (ret == 0) { |
1044c180 | 2117 | #ifdef LOG_DEVICE |
5336be84 | 2118 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
1044c180 MB |
2119 | dev_info(map->dev, "%x => %x\n", reg, *val); |
2120 | #endif | |
2121 | ||
c6b570d9 | 2122 | trace_regmap_reg_read(map, reg, *val); |
b83a313b | 2123 | |
ad278406 AS |
2124 | if (!map->cache_bypass) |
2125 | regcache_write(map, reg, *val); | |
2126 | } | |
f2985367 | 2127 | |
b83a313b MB |
2128 | return ret; |
2129 | } | |
2130 | ||
2131 | /** | |
2132 | * regmap_read(): Read a value from a single register | |
2133 | * | |
0093380c | 2134 | * @map: Register map to read from |
b83a313b MB |
2135 | * @reg: Register to be read from |
2136 | * @val: Pointer to store read value | |
2137 | * | |
2138 | * A value of zero will be returned on success, a negative errno will | |
2139 | * be returned in error cases. | |
2140 | */ | |
2141 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
2142 | { | |
2143 | int ret; | |
2144 | ||
f01ee60f SW |
2145 | if (reg % map->reg_stride) |
2146 | return -EINVAL; | |
2147 | ||
0d4529c5 | 2148 | map->lock(map->lock_arg); |
b83a313b MB |
2149 | |
2150 | ret = _regmap_read(map, reg, val); | |
2151 | ||
0d4529c5 | 2152 | map->unlock(map->lock_arg); |
b83a313b MB |
2153 | |
2154 | return ret; | |
2155 | } | |
2156 | EXPORT_SYMBOL_GPL(regmap_read); | |
2157 | ||
2158 | /** | |
2159 | * regmap_raw_read(): Read raw data from the device | |
2160 | * | |
0093380c | 2161 | * @map: Register map to read from |
b83a313b MB |
2162 | * @reg: First register to be read from |
2163 | * @val: Pointer to store read value | |
2164 | * @val_len: Size of data to read | |
2165 | * | |
2166 | * A value of zero will be returned on success, a negative errno will | |
2167 | * be returned in error cases. | |
2168 | */ | |
2169 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
2170 | size_t val_len) | |
2171 | { | |
b8fb5ab1 MB |
2172 | size_t val_bytes = map->format.val_bytes; |
2173 | size_t val_count = val_len / val_bytes; | |
2174 | unsigned int v; | |
2175 | int ret, i; | |
04e016ad | 2176 | |
d2a5884a AS |
2177 | if (!map->bus) |
2178 | return -EINVAL; | |
851960ba SW |
2179 | if (val_len % map->format.val_bytes) |
2180 | return -EINVAL; | |
f01ee60f SW |
2181 | if (reg % map->reg_stride) |
2182 | return -EINVAL; | |
851960ba | 2183 | |
0d4529c5 | 2184 | map->lock(map->lock_arg); |
b83a313b | 2185 | |
b8fb5ab1 MB |
2186 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
2187 | map->cache_type == REGCACHE_NONE) { | |
2188 | /* Physical block read if there's no cache involved */ | |
2189 | ret = _regmap_raw_read(map, reg, val, val_len); | |
2190 | ||
2191 | } else { | |
2192 | /* Otherwise go word by word for the cache; should be low | |
2193 | * cost as we expect to hit the cache. | |
2194 | */ | |
2195 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
2196 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
2197 | &v); | |
b8fb5ab1 MB |
2198 | if (ret != 0) |
2199 | goto out; | |
2200 | ||
d939fb9a | 2201 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
2202 | } |
2203 | } | |
b83a313b | 2204 | |
b8fb5ab1 | 2205 | out: |
0d4529c5 | 2206 | map->unlock(map->lock_arg); |
b83a313b MB |
2207 | |
2208 | return ret; | |
2209 | } | |
2210 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
2211 | ||
67252287 SK |
2212 | /** |
2213 | * regmap_field_read(): Read a value to a single register field | |
2214 | * | |
2215 | * @field: Register field to read from | |
2216 | * @val: Pointer to store read value | |
2217 | * | |
2218 | * A value of zero will be returned on success, a negative errno will | |
2219 | * be returned in error cases. | |
2220 | */ | |
2221 | int regmap_field_read(struct regmap_field *field, unsigned int *val) | |
2222 | { | |
2223 | int ret; | |
2224 | unsigned int reg_val; | |
2225 | ret = regmap_read(field->regmap, field->reg, ®_val); | |
2226 | if (ret != 0) | |
2227 | return ret; | |
2228 | ||
2229 | reg_val &= field->mask; | |
2230 | reg_val >>= field->shift; | |
2231 | *val = reg_val; | |
2232 | ||
2233 | return ret; | |
2234 | } | |
2235 | EXPORT_SYMBOL_GPL(regmap_field_read); | |
2236 | ||
a0102375 KM |
2237 | /** |
2238 | * regmap_fields_read(): Read a value to a single register field with port ID | |
2239 | * | |
2240 | * @field: Register field to read from | |
2241 | * @id: port ID | |
2242 | * @val: Pointer to store read value | |
2243 | * | |
2244 | * A value of zero will be returned on success, a negative errno will | |
2245 | * be returned in error cases. | |
2246 | */ | |
2247 | int regmap_fields_read(struct regmap_field *field, unsigned int id, | |
2248 | unsigned int *val) | |
2249 | { | |
2250 | int ret; | |
2251 | unsigned int reg_val; | |
2252 | ||
2253 | if (id >= field->id_size) | |
2254 | return -EINVAL; | |
2255 | ||
2256 | ret = regmap_read(field->regmap, | |
2257 | field->reg + (field->id_offset * id), | |
2258 | ®_val); | |
2259 | if (ret != 0) | |
2260 | return ret; | |
2261 | ||
2262 | reg_val &= field->mask; | |
2263 | reg_val >>= field->shift; | |
2264 | *val = reg_val; | |
2265 | ||
2266 | return ret; | |
2267 | } | |
2268 | EXPORT_SYMBOL_GPL(regmap_fields_read); | |
2269 | ||
b83a313b MB |
2270 | /** |
2271 | * regmap_bulk_read(): Read multiple registers from the device | |
2272 | * | |
0093380c | 2273 | * @map: Register map to read from |
b83a313b MB |
2274 | * @reg: First register to be read from |
2275 | * @val: Pointer to store read value, in native register size for device | |
2276 | * @val_count: Number of registers to read | |
2277 | * | |
2278 | * A value of zero will be returned on success, a negative errno will | |
2279 | * be returned in error cases. | |
2280 | */ | |
2281 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
2282 | size_t val_count) | |
2283 | { | |
2284 | int ret, i; | |
2285 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 2286 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 2287 | |
f01ee60f SW |
2288 | if (reg % map->reg_stride) |
2289 | return -EINVAL; | |
b83a313b | 2290 | |
3b58ee13 | 2291 | if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) { |
2e33caf1 AJ |
2292 | /* |
2293 | * Some devices does not support bulk read, for | |
2294 | * them we have a series of single read operations. | |
2295 | */ | |
2296 | if (map->use_single_rw) { | |
2297 | for (i = 0; i < val_count; i++) { | |
2298 | ret = regmap_raw_read(map, | |
2299 | reg + (i * map->reg_stride), | |
2300 | val + (i * val_bytes), | |
2301 | val_bytes); | |
2302 | if (ret != 0) | |
2303 | return ret; | |
2304 | } | |
2305 | } else { | |
2306 | ret = regmap_raw_read(map, reg, val, | |
2307 | val_bytes * val_count); | |
2308 | if (ret != 0) | |
2309 | return ret; | |
2310 | } | |
de2d808f MB |
2311 | |
2312 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 2313 | map->format.parse_inplace(val + i); |
de2d808f MB |
2314 | } else { |
2315 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 2316 | unsigned int ival; |
f01ee60f | 2317 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 2318 | &ival); |
de2d808f MB |
2319 | if (ret != 0) |
2320 | return ret; | |
15b8d2c4 | 2321 | map->format.format_val(val + (i * val_bytes), ival, 0); |
de2d808f MB |
2322 | } |
2323 | } | |
b83a313b MB |
2324 | |
2325 | return 0; | |
2326 | } | |
2327 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
2328 | ||
018690d3 MB |
2329 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
2330 | unsigned int mask, unsigned int val, | |
2331 | bool *change) | |
b83a313b MB |
2332 | { |
2333 | int ret; | |
d91e8db2 | 2334 | unsigned int tmp, orig; |
b83a313b | 2335 | |
d91e8db2 | 2336 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 2337 | if (ret != 0) |
fc3ebd78 | 2338 | return ret; |
b83a313b | 2339 | |
d91e8db2 | 2340 | tmp = orig & ~mask; |
b83a313b MB |
2341 | tmp |= val & mask; |
2342 | ||
018690d3 | 2343 | if (tmp != orig) { |
d91e8db2 | 2344 | ret = _regmap_write(map, reg, tmp); |
e2f74dc6 XL |
2345 | if (change) |
2346 | *change = true; | |
018690d3 | 2347 | } else { |
e2f74dc6 XL |
2348 | if (change) |
2349 | *change = false; | |
018690d3 | 2350 | } |
b83a313b | 2351 | |
b83a313b MB |
2352 | return ret; |
2353 | } | |
018690d3 MB |
2354 | |
2355 | /** | |
2356 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
2357 | * | |
2358 | * @map: Register map to update | |
2359 | * @reg: Register to update | |
2360 | * @mask: Bitmask to change | |
2361 | * @val: New value for bitmask | |
2362 | * | |
2363 | * Returns zero for success, a negative number on error. | |
2364 | */ | |
2365 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
2366 | unsigned int mask, unsigned int val) | |
2367 | { | |
fc3ebd78 KG |
2368 | int ret; |
2369 | ||
0d4529c5 | 2370 | map->lock(map->lock_arg); |
e2f74dc6 | 2371 | ret = _regmap_update_bits(map, reg, mask, val, NULL); |
0d4529c5 | 2372 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
2373 | |
2374 | return ret; | |
018690d3 | 2375 | } |
b83a313b | 2376 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 2377 | |
915f441b MB |
2378 | /** |
2379 | * regmap_update_bits_async: Perform a read/modify/write cycle on the register | |
2380 | * map asynchronously | |
2381 | * | |
2382 | * @map: Register map to update | |
2383 | * @reg: Register to update | |
2384 | * @mask: Bitmask to change | |
2385 | * @val: New value for bitmask | |
2386 | * | |
2387 | * With most buses the read must be done synchronously so this is most | |
2388 | * useful for devices with a cache which do not need to interact with | |
2389 | * the hardware to determine the current register value. | |
2390 | * | |
2391 | * Returns zero for success, a negative number on error. | |
2392 | */ | |
2393 | int regmap_update_bits_async(struct regmap *map, unsigned int reg, | |
2394 | unsigned int mask, unsigned int val) | |
2395 | { | |
915f441b MB |
2396 | int ret; |
2397 | ||
2398 | map->lock(map->lock_arg); | |
2399 | ||
2400 | map->async = true; | |
2401 | ||
e2f74dc6 | 2402 | ret = _regmap_update_bits(map, reg, mask, val, NULL); |
915f441b MB |
2403 | |
2404 | map->async = false; | |
2405 | ||
2406 | map->unlock(map->lock_arg); | |
2407 | ||
2408 | return ret; | |
2409 | } | |
2410 | EXPORT_SYMBOL_GPL(regmap_update_bits_async); | |
2411 | ||
018690d3 MB |
2412 | /** |
2413 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
2414 | * register map and report if updated | |
2415 | * | |
2416 | * @map: Register map to update | |
2417 | * @reg: Register to update | |
2418 | * @mask: Bitmask to change | |
2419 | * @val: New value for bitmask | |
2420 | * @change: Boolean indicating if a write was done | |
2421 | * | |
2422 | * Returns zero for success, a negative number on error. | |
2423 | */ | |
2424 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
2425 | unsigned int mask, unsigned int val, | |
2426 | bool *change) | |
2427 | { | |
fc3ebd78 KG |
2428 | int ret; |
2429 | ||
0d4529c5 | 2430 | map->lock(map->lock_arg); |
fc3ebd78 | 2431 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 2432 | map->unlock(map->lock_arg); |
fc3ebd78 | 2433 | return ret; |
018690d3 MB |
2434 | } |
2435 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
2436 | ||
915f441b MB |
2437 | /** |
2438 | * regmap_update_bits_check_async: Perform a read/modify/write cycle on the | |
2439 | * register map asynchronously and report if | |
2440 | * updated | |
2441 | * | |
2442 | * @map: Register map to update | |
2443 | * @reg: Register to update | |
2444 | * @mask: Bitmask to change | |
2445 | * @val: New value for bitmask | |
2446 | * @change: Boolean indicating if a write was done | |
2447 | * | |
2448 | * With most buses the read must be done synchronously so this is most | |
2449 | * useful for devices with a cache which do not need to interact with | |
2450 | * the hardware to determine the current register value. | |
2451 | * | |
2452 | * Returns zero for success, a negative number on error. | |
2453 | */ | |
2454 | int regmap_update_bits_check_async(struct regmap *map, unsigned int reg, | |
2455 | unsigned int mask, unsigned int val, | |
2456 | bool *change) | |
2457 | { | |
2458 | int ret; | |
2459 | ||
2460 | map->lock(map->lock_arg); | |
2461 | ||
2462 | map->async = true; | |
2463 | ||
2464 | ret = _regmap_update_bits(map, reg, mask, val, change); | |
2465 | ||
2466 | map->async = false; | |
2467 | ||
2468 | map->unlock(map->lock_arg); | |
2469 | ||
2470 | return ret; | |
2471 | } | |
2472 | EXPORT_SYMBOL_GPL(regmap_update_bits_check_async); | |
2473 | ||
0d509f2b MB |
2474 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
2475 | { | |
2476 | struct regmap *map = async->map; | |
2477 | bool wake; | |
2478 | ||
c6b570d9 | 2479 | trace_regmap_async_io_complete(map); |
fe7d4ccd | 2480 | |
0d509f2b | 2481 | spin_lock(&map->async_lock); |
7e09a979 | 2482 | list_move(&async->list, &map->async_free); |
0d509f2b MB |
2483 | wake = list_empty(&map->async_list); |
2484 | ||
2485 | if (ret != 0) | |
2486 | map->async_ret = ret; | |
2487 | ||
2488 | spin_unlock(&map->async_lock); | |
2489 | ||
0d509f2b MB |
2490 | if (wake) |
2491 | wake_up(&map->async_waitq); | |
2492 | } | |
f804fb56 | 2493 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
0d509f2b MB |
2494 | |
2495 | static int regmap_async_is_done(struct regmap *map) | |
2496 | { | |
2497 | unsigned long flags; | |
2498 | int ret; | |
2499 | ||
2500 | spin_lock_irqsave(&map->async_lock, flags); | |
2501 | ret = list_empty(&map->async_list); | |
2502 | spin_unlock_irqrestore(&map->async_lock, flags); | |
2503 | ||
2504 | return ret; | |
2505 | } | |
2506 | ||
2507 | /** | |
2508 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
2509 | * | |
2510 | * @map: Map to operate on. | |
2511 | * | |
2512 | * Blocks until any pending asynchronous I/O has completed. Returns | |
2513 | * an error code for any failed I/O operations. | |
2514 | */ | |
2515 | int regmap_async_complete(struct regmap *map) | |
2516 | { | |
2517 | unsigned long flags; | |
2518 | int ret; | |
2519 | ||
2520 | /* Nothing to do with no async support */ | |
f2e055e7 | 2521 | if (!map->bus || !map->bus->async_write) |
0d509f2b MB |
2522 | return 0; |
2523 | ||
c6b570d9 | 2524 | trace_regmap_async_complete_start(map); |
fe7d4ccd | 2525 | |
0d509f2b MB |
2526 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
2527 | ||
2528 | spin_lock_irqsave(&map->async_lock, flags); | |
2529 | ret = map->async_ret; | |
2530 | map->async_ret = 0; | |
2531 | spin_unlock_irqrestore(&map->async_lock, flags); | |
2532 | ||
c6b570d9 | 2533 | trace_regmap_async_complete_done(map); |
fe7d4ccd | 2534 | |
0d509f2b MB |
2535 | return ret; |
2536 | } | |
f88948ef | 2537 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
0d509f2b | 2538 | |
22f0d90a MB |
2539 | /** |
2540 | * regmap_register_patch: Register and apply register updates to be applied | |
2541 | * on device initialistion | |
2542 | * | |
2543 | * @map: Register map to apply updates to. | |
2544 | * @regs: Values to update. | |
2545 | * @num_regs: Number of entries in regs. | |
2546 | * | |
2547 | * Register a set of register updates to be applied to the device | |
2548 | * whenever the device registers are synchronised with the cache and | |
2549 | * apply them immediately. Typically this is used to apply | |
2550 | * corrections to be applied to the device defaults on startup, such | |
2551 | * as the updates some vendors provide to undocumented registers. | |
56fb1c74 MB |
2552 | * |
2553 | * The caller must ensure that this function cannot be called | |
2554 | * concurrently with either itself or regcache_sync(). | |
22f0d90a MB |
2555 | */ |
2556 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
2557 | int num_regs) | |
2558 | { | |
aab13ebc | 2559 | struct reg_default *p; |
6bf13103 | 2560 | int ret; |
22f0d90a MB |
2561 | bool bypass; |
2562 | ||
bd60e381 CZ |
2563 | if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n", |
2564 | num_regs)) | |
2565 | return 0; | |
2566 | ||
aab13ebc MB |
2567 | p = krealloc(map->patch, |
2568 | sizeof(struct reg_default) * (map->patch_regs + num_regs), | |
2569 | GFP_KERNEL); | |
2570 | if (p) { | |
2571 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); | |
2572 | map->patch = p; | |
2573 | map->patch_regs += num_regs; | |
22f0d90a | 2574 | } else { |
56fb1c74 | 2575 | return -ENOMEM; |
22f0d90a MB |
2576 | } |
2577 | ||
0d4529c5 | 2578 | map->lock(map->lock_arg); |
22f0d90a MB |
2579 | |
2580 | bypass = map->cache_bypass; | |
2581 | ||
2582 | map->cache_bypass = true; | |
1a25f261 | 2583 | map->async = true; |
22f0d90a | 2584 | |
6bf13103 | 2585 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
22f0d90a | 2586 | |
1a25f261 | 2587 | map->async = false; |
22f0d90a MB |
2588 | map->cache_bypass = bypass; |
2589 | ||
0d4529c5 | 2590 | map->unlock(map->lock_arg); |
22f0d90a | 2591 | |
1a25f261 MB |
2592 | regmap_async_complete(map); |
2593 | ||
22f0d90a MB |
2594 | return ret; |
2595 | } | |
2596 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
2597 | ||
eae4b51b | 2598 | /* |
a6539c32 MB |
2599 | * regmap_get_val_bytes(): Report the size of a register value |
2600 | * | |
2601 | * Report the size of a register value, mainly intended to for use by | |
2602 | * generic infrastructure built on top of regmap. | |
2603 | */ | |
2604 | int regmap_get_val_bytes(struct regmap *map) | |
2605 | { | |
2606 | if (map->format.format_write) | |
2607 | return -EINVAL; | |
2608 | ||
2609 | return map->format.val_bytes; | |
2610 | } | |
2611 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
2612 | ||
668abc72 SK |
2613 | /** |
2614 | * regmap_get_max_register(): Report the max register value | |
2615 | * | |
2616 | * Report the max register value, mainly intended to for use by | |
2617 | * generic infrastructure built on top of regmap. | |
2618 | */ | |
2619 | int regmap_get_max_register(struct regmap *map) | |
2620 | { | |
2621 | return map->max_register ? map->max_register : -EINVAL; | |
2622 | } | |
2623 | EXPORT_SYMBOL_GPL(regmap_get_max_register); | |
2624 | ||
a2f776cb SK |
2625 | /** |
2626 | * regmap_get_reg_stride(): Report the register address stride | |
2627 | * | |
2628 | * Report the register address stride, mainly intended to for use by | |
2629 | * generic infrastructure built on top of regmap. | |
2630 | */ | |
2631 | int regmap_get_reg_stride(struct regmap *map) | |
2632 | { | |
2633 | return map->reg_stride; | |
2634 | } | |
2635 | EXPORT_SYMBOL_GPL(regmap_get_reg_stride); | |
2636 | ||
13ff50c8 NC |
2637 | int regmap_parse_val(struct regmap *map, const void *buf, |
2638 | unsigned int *val) | |
2639 | { | |
2640 | if (!map->format.parse_val) | |
2641 | return -EINVAL; | |
2642 | ||
2643 | *val = map->format.parse_val(buf); | |
2644 | ||
2645 | return 0; | |
2646 | } | |
2647 | EXPORT_SYMBOL_GPL(regmap_parse_val); | |
2648 | ||
31244e39 MB |
2649 | static int __init regmap_initcall(void) |
2650 | { | |
2651 | regmap_debugfs_initcall(); | |
2652 | ||
2653 | return 0; | |
2654 | } | |
2655 | postcore_initcall(regmap_initcall); |