Commit | Line | Data |
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b83a313b MB |
1 | /* |
2 | * Register map access API | |
3 | * | |
4 | * Copyright 2011 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
f5d6eba7 | 13 | #include <linux/device.h> |
b83a313b | 14 | #include <linux/slab.h> |
19694b5e | 15 | #include <linux/export.h> |
b83a313b MB |
16 | #include <linux/mutex.h> |
17 | #include <linux/err.h> | |
6863ca62 | 18 | #include <linux/rbtree.h> |
30b2a553 | 19 | #include <linux/sched.h> |
b83a313b | 20 | |
fb2736bb MB |
21 | #define CREATE_TRACE_POINTS |
22 | #include <trace/events/regmap.h> | |
23 | ||
93de9124 | 24 | #include "internal.h" |
b83a313b | 25 | |
1044c180 MB |
26 | /* |
27 | * Sometimes for failures during very early init the trace | |
28 | * infrastructure isn't available early enough to be used. For this | |
29 | * sort of problem defining LOG_DEVICE will add printks for basic | |
30 | * register I/O on a specific device. | |
31 | */ | |
32 | #undef LOG_DEVICE | |
33 | ||
34 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
35 | unsigned int mask, unsigned int val, | |
36 | bool *change); | |
37 | ||
ad278406 AS |
38 | static int _regmap_bus_read(void *context, unsigned int reg, |
39 | unsigned int *val); | |
07c320dc AS |
40 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
41 | unsigned int val); | |
42 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
43 | unsigned int val); | |
ad278406 | 44 | |
0d509f2b MB |
45 | static void async_cleanup(struct work_struct *work) |
46 | { | |
47 | struct regmap_async *async = container_of(work, struct regmap_async, | |
48 | cleanup); | |
49 | ||
50 | kfree(async->work_buf); | |
51 | kfree(async); | |
52 | } | |
53 | ||
76aad392 DC |
54 | bool regmap_reg_in_ranges(unsigned int reg, |
55 | const struct regmap_range *ranges, | |
56 | unsigned int nranges) | |
57 | { | |
58 | const struct regmap_range *r; | |
59 | int i; | |
60 | ||
61 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
62 | if (regmap_reg_in_range(reg, r)) | |
63 | return true; | |
64 | return false; | |
65 | } | |
66 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
67 | ||
154881e5 MB |
68 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
69 | const struct regmap_access_table *table) | |
76aad392 DC |
70 | { |
71 | /* Check "no ranges" first */ | |
72 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
73 | return false; | |
74 | ||
75 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
76 | if (!table->n_yes_ranges) | |
77 | return true; | |
78 | ||
79 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
80 | table->n_yes_ranges); | |
81 | } | |
154881e5 | 82 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
76aad392 | 83 | |
8de2f081 MB |
84 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
85 | { | |
86 | if (map->max_register && reg > map->max_register) | |
87 | return false; | |
88 | ||
89 | if (map->writeable_reg) | |
90 | return map->writeable_reg(map->dev, reg); | |
91 | ||
76aad392 | 92 | if (map->wr_table) |
154881e5 | 93 | return regmap_check_range_table(map, reg, map->wr_table); |
76aad392 | 94 | |
8de2f081 MB |
95 | return true; |
96 | } | |
97 | ||
98 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
99 | { | |
100 | if (map->max_register && reg > map->max_register) | |
101 | return false; | |
102 | ||
4191f197 WS |
103 | if (map->format.format_write) |
104 | return false; | |
105 | ||
8de2f081 MB |
106 | if (map->readable_reg) |
107 | return map->readable_reg(map->dev, reg); | |
108 | ||
76aad392 | 109 | if (map->rd_table) |
154881e5 | 110 | return regmap_check_range_table(map, reg, map->rd_table); |
76aad392 | 111 | |
8de2f081 MB |
112 | return true; |
113 | } | |
114 | ||
115 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
116 | { | |
4191f197 | 117 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
118 | return false; |
119 | ||
120 | if (map->volatile_reg) | |
121 | return map->volatile_reg(map->dev, reg); | |
122 | ||
76aad392 | 123 | if (map->volatile_table) |
154881e5 | 124 | return regmap_check_range_table(map, reg, map->volatile_table); |
76aad392 | 125 | |
b92be6fe MB |
126 | if (map->cache_ops) |
127 | return false; | |
128 | else | |
129 | return true; | |
8de2f081 MB |
130 | } |
131 | ||
132 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
133 | { | |
4191f197 | 134 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
135 | return false; |
136 | ||
137 | if (map->precious_reg) | |
138 | return map->precious_reg(map->dev, reg); | |
139 | ||
76aad392 | 140 | if (map->precious_table) |
154881e5 | 141 | return regmap_check_range_table(map, reg, map->precious_table); |
76aad392 | 142 | |
8de2f081 MB |
143 | return false; |
144 | } | |
145 | ||
82cd9965 | 146 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
a8f28cfa | 147 | size_t num) |
82cd9965 LPC |
148 | { |
149 | unsigned int i; | |
150 | ||
151 | for (i = 0; i < num; i++) | |
152 | if (!regmap_volatile(map, reg + i)) | |
153 | return false; | |
154 | ||
155 | return true; | |
156 | } | |
157 | ||
9aa50750 WS |
158 | static void regmap_format_2_6_write(struct regmap *map, |
159 | unsigned int reg, unsigned int val) | |
160 | { | |
161 | u8 *out = map->work_buf; | |
162 | ||
163 | *out = (reg << 6) | val; | |
164 | } | |
165 | ||
b83a313b MB |
166 | static void regmap_format_4_12_write(struct regmap *map, |
167 | unsigned int reg, unsigned int val) | |
168 | { | |
169 | __be16 *out = map->work_buf; | |
170 | *out = cpu_to_be16((reg << 12) | val); | |
171 | } | |
172 | ||
173 | static void regmap_format_7_9_write(struct regmap *map, | |
174 | unsigned int reg, unsigned int val) | |
175 | { | |
176 | __be16 *out = map->work_buf; | |
177 | *out = cpu_to_be16((reg << 9) | val); | |
178 | } | |
179 | ||
7e5ec63e LPC |
180 | static void regmap_format_10_14_write(struct regmap *map, |
181 | unsigned int reg, unsigned int val) | |
182 | { | |
183 | u8 *out = map->work_buf; | |
184 | ||
185 | out[2] = val; | |
186 | out[1] = (val >> 8) | (reg << 6); | |
187 | out[0] = reg >> 2; | |
188 | } | |
189 | ||
d939fb9a | 190 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
191 | { |
192 | u8 *b = buf; | |
193 | ||
d939fb9a | 194 | b[0] = val << shift; |
b83a313b MB |
195 | } |
196 | ||
141eba2e | 197 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
198 | { |
199 | __be16 *b = buf; | |
200 | ||
d939fb9a | 201 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
202 | } |
203 | ||
141eba2e SW |
204 | static void regmap_format_16_native(void *buf, unsigned int val, |
205 | unsigned int shift) | |
206 | { | |
207 | *(u16 *)buf = val << shift; | |
208 | } | |
209 | ||
d939fb9a | 210 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
211 | { |
212 | u8 *b = buf; | |
213 | ||
d939fb9a MR |
214 | val <<= shift; |
215 | ||
ea279fc5 MR |
216 | b[0] = val >> 16; |
217 | b[1] = val >> 8; | |
218 | b[2] = val; | |
219 | } | |
220 | ||
141eba2e | 221 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
222 | { |
223 | __be32 *b = buf; | |
224 | ||
d939fb9a | 225 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
226 | } |
227 | ||
141eba2e SW |
228 | static void regmap_format_32_native(void *buf, unsigned int val, |
229 | unsigned int shift) | |
230 | { | |
231 | *(u32 *)buf = val << shift; | |
232 | } | |
233 | ||
8a819ff8 | 234 | static void regmap_parse_inplace_noop(void *buf) |
b83a313b | 235 | { |
8a819ff8 MB |
236 | } |
237 | ||
238 | static unsigned int regmap_parse_8(const void *buf) | |
239 | { | |
240 | const u8 *b = buf; | |
b83a313b MB |
241 | |
242 | return b[0]; | |
243 | } | |
244 | ||
8a819ff8 MB |
245 | static unsigned int regmap_parse_16_be(const void *buf) |
246 | { | |
247 | const __be16 *b = buf; | |
248 | ||
249 | return be16_to_cpu(b[0]); | |
250 | } | |
251 | ||
252 | static void regmap_parse_16_be_inplace(void *buf) | |
b83a313b MB |
253 | { |
254 | __be16 *b = buf; | |
255 | ||
256 | b[0] = be16_to_cpu(b[0]); | |
b83a313b MB |
257 | } |
258 | ||
8a819ff8 | 259 | static unsigned int regmap_parse_16_native(const void *buf) |
141eba2e SW |
260 | { |
261 | return *(u16 *)buf; | |
262 | } | |
263 | ||
8a819ff8 | 264 | static unsigned int regmap_parse_24(const void *buf) |
ea279fc5 | 265 | { |
8a819ff8 | 266 | const u8 *b = buf; |
ea279fc5 MR |
267 | unsigned int ret = b[2]; |
268 | ret |= ((unsigned int)b[1]) << 8; | |
269 | ret |= ((unsigned int)b[0]) << 16; | |
270 | ||
271 | return ret; | |
272 | } | |
273 | ||
8a819ff8 MB |
274 | static unsigned int regmap_parse_32_be(const void *buf) |
275 | { | |
276 | const __be32 *b = buf; | |
277 | ||
278 | return be32_to_cpu(b[0]); | |
279 | } | |
280 | ||
281 | static void regmap_parse_32_be_inplace(void *buf) | |
7d5e525b MB |
282 | { |
283 | __be32 *b = buf; | |
284 | ||
285 | b[0] = be32_to_cpu(b[0]); | |
7d5e525b MB |
286 | } |
287 | ||
8a819ff8 | 288 | static unsigned int regmap_parse_32_native(const void *buf) |
141eba2e SW |
289 | { |
290 | return *(u32 *)buf; | |
291 | } | |
292 | ||
0d4529c5 | 293 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 294 | { |
0d4529c5 | 295 | struct regmap *map = __map; |
bacdbe07 SW |
296 | mutex_lock(&map->mutex); |
297 | } | |
298 | ||
0d4529c5 | 299 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 300 | { |
0d4529c5 | 301 | struct regmap *map = __map; |
bacdbe07 SW |
302 | mutex_unlock(&map->mutex); |
303 | } | |
304 | ||
0d4529c5 | 305 | static void regmap_lock_spinlock(void *__map) |
b4519c71 | 306 | __acquires(&map->spinlock) |
bacdbe07 | 307 | { |
0d4529c5 | 308 | struct regmap *map = __map; |
92ab1aab LPC |
309 | unsigned long flags; |
310 | ||
311 | spin_lock_irqsave(&map->spinlock, flags); | |
312 | map->spinlock_flags = flags; | |
bacdbe07 SW |
313 | } |
314 | ||
0d4529c5 | 315 | static void regmap_unlock_spinlock(void *__map) |
b4519c71 | 316 | __releases(&map->spinlock) |
bacdbe07 | 317 | { |
0d4529c5 | 318 | struct regmap *map = __map; |
92ab1aab | 319 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
bacdbe07 SW |
320 | } |
321 | ||
72b39f6f MB |
322 | static void dev_get_regmap_release(struct device *dev, void *res) |
323 | { | |
324 | /* | |
325 | * We don't actually have anything to do here; the goal here | |
326 | * is not to manage the regmap but to provide a simple way to | |
327 | * get the regmap back given a struct device. | |
328 | */ | |
329 | } | |
330 | ||
6863ca62 KG |
331 | static bool _regmap_range_add(struct regmap *map, |
332 | struct regmap_range_node *data) | |
333 | { | |
334 | struct rb_root *root = &map->range_tree; | |
335 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
336 | ||
337 | while (*new) { | |
338 | struct regmap_range_node *this = | |
339 | container_of(*new, struct regmap_range_node, node); | |
340 | ||
341 | parent = *new; | |
342 | if (data->range_max < this->range_min) | |
343 | new = &((*new)->rb_left); | |
344 | else if (data->range_min > this->range_max) | |
345 | new = &((*new)->rb_right); | |
346 | else | |
347 | return false; | |
348 | } | |
349 | ||
350 | rb_link_node(&data->node, parent, new); | |
351 | rb_insert_color(&data->node, root); | |
352 | ||
353 | return true; | |
354 | } | |
355 | ||
356 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
357 | unsigned int reg) | |
358 | { | |
359 | struct rb_node *node = map->range_tree.rb_node; | |
360 | ||
361 | while (node) { | |
362 | struct regmap_range_node *this = | |
363 | container_of(node, struct regmap_range_node, node); | |
364 | ||
365 | if (reg < this->range_min) | |
366 | node = node->rb_left; | |
367 | else if (reg > this->range_max) | |
368 | node = node->rb_right; | |
369 | else | |
370 | return this; | |
371 | } | |
372 | ||
373 | return NULL; | |
374 | } | |
375 | ||
376 | static void regmap_range_exit(struct regmap *map) | |
377 | { | |
378 | struct rb_node *next; | |
379 | struct regmap_range_node *range_node; | |
380 | ||
381 | next = rb_first(&map->range_tree); | |
382 | while (next) { | |
383 | range_node = rb_entry(next, struct regmap_range_node, node); | |
384 | next = rb_next(&range_node->node); | |
385 | rb_erase(&range_node->node, &map->range_tree); | |
386 | kfree(range_node); | |
387 | } | |
388 | ||
389 | kfree(map->selector_work_buf); | |
390 | } | |
391 | ||
b83a313b MB |
392 | /** |
393 | * regmap_init(): Initialise register map | |
394 | * | |
395 | * @dev: Device that will be interacted with | |
396 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 397 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
398 | * @config: Configuration for register map |
399 | * | |
400 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
401 | * a struct regmap. This function should generally not be called | |
402 | * directly, it should be called by bus-specific init functions. | |
403 | */ | |
404 | struct regmap *regmap_init(struct device *dev, | |
405 | const struct regmap_bus *bus, | |
0135bbcc | 406 | void *bus_context, |
b83a313b MB |
407 | const struct regmap_config *config) |
408 | { | |
72b39f6f | 409 | struct regmap *map, **m; |
b83a313b | 410 | int ret = -EINVAL; |
141eba2e | 411 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 412 | int i, j; |
b83a313b | 413 | |
d2a5884a | 414 | if (!config) |
abbb18fb | 415 | goto err; |
b83a313b MB |
416 | |
417 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
418 | if (map == NULL) { | |
419 | ret = -ENOMEM; | |
420 | goto err; | |
421 | } | |
422 | ||
0d4529c5 DC |
423 | if (config->lock && config->unlock) { |
424 | map->lock = config->lock; | |
425 | map->unlock = config->unlock; | |
426 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 427 | } else { |
d2a5884a AS |
428 | if ((bus && bus->fast_io) || |
429 | config->fast_io) { | |
0d4529c5 DC |
430 | spin_lock_init(&map->spinlock); |
431 | map->lock = regmap_lock_spinlock; | |
432 | map->unlock = regmap_unlock_spinlock; | |
433 | } else { | |
434 | mutex_init(&map->mutex); | |
435 | map->lock = regmap_lock_mutex; | |
436 | map->unlock = regmap_unlock_mutex; | |
437 | } | |
438 | map->lock_arg = map; | |
bacdbe07 | 439 | } |
c212accc | 440 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 441 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 442 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
443 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
444 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 445 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
446 | if (config->reg_stride) |
447 | map->reg_stride = config->reg_stride; | |
448 | else | |
449 | map->reg_stride = 1; | |
2e33caf1 | 450 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
451 | map->dev = dev; |
452 | map->bus = bus; | |
0135bbcc | 453 | map->bus_context = bus_context; |
2e2ae66d | 454 | map->max_register = config->max_register; |
76aad392 DC |
455 | map->wr_table = config->wr_table; |
456 | map->rd_table = config->rd_table; | |
457 | map->volatile_table = config->volatile_table; | |
458 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
459 | map->writeable_reg = config->writeable_reg; |
460 | map->readable_reg = config->readable_reg; | |
461 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 462 | map->precious_reg = config->precious_reg; |
5d1729e7 | 463 | map->cache_type = config->cache_type; |
72b39f6f | 464 | map->name = config->name; |
b83a313b | 465 | |
0d509f2b MB |
466 | spin_lock_init(&map->async_lock); |
467 | INIT_LIST_HEAD(&map->async_list); | |
468 | init_waitqueue_head(&map->async_waitq); | |
469 | ||
6f306441 LPC |
470 | if (config->read_flag_mask || config->write_flag_mask) { |
471 | map->read_flag_mask = config->read_flag_mask; | |
472 | map->write_flag_mask = config->write_flag_mask; | |
d2a5884a | 473 | } else if (bus) { |
6f306441 LPC |
474 | map->read_flag_mask = bus->read_flag_mask; |
475 | } | |
476 | ||
d2a5884a AS |
477 | if (!bus) { |
478 | map->reg_read = config->reg_read; | |
479 | map->reg_write = config->reg_write; | |
480 | ||
481 | map->defer_caching = false; | |
482 | goto skip_format_initialization; | |
483 | } else { | |
484 | map->reg_read = _regmap_bus_read; | |
485 | } | |
ad278406 | 486 | |
141eba2e SW |
487 | reg_endian = config->reg_format_endian; |
488 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
489 | reg_endian = bus->reg_format_endian_default; | |
490 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
491 | reg_endian = REGMAP_ENDIAN_BIG; | |
492 | ||
493 | val_endian = config->val_format_endian; | |
494 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
495 | val_endian = bus->val_format_endian_default; | |
496 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
497 | val_endian = REGMAP_ENDIAN_BIG; | |
498 | ||
d939fb9a | 499 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
500 | case 2: |
501 | switch (config->val_bits) { | |
502 | case 6: | |
503 | map->format.format_write = regmap_format_2_6_write; | |
504 | break; | |
505 | default: | |
506 | goto err_map; | |
507 | } | |
508 | break; | |
509 | ||
b83a313b MB |
510 | case 4: |
511 | switch (config->val_bits) { | |
512 | case 12: | |
513 | map->format.format_write = regmap_format_4_12_write; | |
514 | break; | |
515 | default: | |
516 | goto err_map; | |
517 | } | |
518 | break; | |
519 | ||
520 | case 7: | |
521 | switch (config->val_bits) { | |
522 | case 9: | |
523 | map->format.format_write = regmap_format_7_9_write; | |
524 | break; | |
525 | default: | |
526 | goto err_map; | |
527 | } | |
528 | break; | |
529 | ||
7e5ec63e LPC |
530 | case 10: |
531 | switch (config->val_bits) { | |
532 | case 14: | |
533 | map->format.format_write = regmap_format_10_14_write; | |
534 | break; | |
535 | default: | |
536 | goto err_map; | |
537 | } | |
538 | break; | |
539 | ||
b83a313b MB |
540 | case 8: |
541 | map->format.format_reg = regmap_format_8; | |
542 | break; | |
543 | ||
544 | case 16: | |
141eba2e SW |
545 | switch (reg_endian) { |
546 | case REGMAP_ENDIAN_BIG: | |
547 | map->format.format_reg = regmap_format_16_be; | |
548 | break; | |
549 | case REGMAP_ENDIAN_NATIVE: | |
550 | map->format.format_reg = regmap_format_16_native; | |
551 | break; | |
552 | default: | |
553 | goto err_map; | |
554 | } | |
b83a313b MB |
555 | break; |
556 | ||
237019e7 LPC |
557 | case 24: |
558 | if (reg_endian != REGMAP_ENDIAN_BIG) | |
559 | goto err_map; | |
560 | map->format.format_reg = regmap_format_24; | |
561 | break; | |
562 | ||
7d5e525b | 563 | case 32: |
141eba2e SW |
564 | switch (reg_endian) { |
565 | case REGMAP_ENDIAN_BIG: | |
566 | map->format.format_reg = regmap_format_32_be; | |
567 | break; | |
568 | case REGMAP_ENDIAN_NATIVE: | |
569 | map->format.format_reg = regmap_format_32_native; | |
570 | break; | |
571 | default: | |
572 | goto err_map; | |
573 | } | |
7d5e525b MB |
574 | break; |
575 | ||
b83a313b MB |
576 | default: |
577 | goto err_map; | |
578 | } | |
579 | ||
8a819ff8 MB |
580 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
581 | map->format.parse_inplace = regmap_parse_inplace_noop; | |
582 | ||
b83a313b MB |
583 | switch (config->val_bits) { |
584 | case 8: | |
585 | map->format.format_val = regmap_format_8; | |
586 | map->format.parse_val = regmap_parse_8; | |
8a819ff8 | 587 | map->format.parse_inplace = regmap_parse_inplace_noop; |
b83a313b MB |
588 | break; |
589 | case 16: | |
141eba2e SW |
590 | switch (val_endian) { |
591 | case REGMAP_ENDIAN_BIG: | |
592 | map->format.format_val = regmap_format_16_be; | |
593 | map->format.parse_val = regmap_parse_16_be; | |
8a819ff8 | 594 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
141eba2e SW |
595 | break; |
596 | case REGMAP_ENDIAN_NATIVE: | |
597 | map->format.format_val = regmap_format_16_native; | |
598 | map->format.parse_val = regmap_parse_16_native; | |
599 | break; | |
600 | default: | |
601 | goto err_map; | |
602 | } | |
b83a313b | 603 | break; |
ea279fc5 | 604 | case 24: |
141eba2e SW |
605 | if (val_endian != REGMAP_ENDIAN_BIG) |
606 | goto err_map; | |
ea279fc5 MR |
607 | map->format.format_val = regmap_format_24; |
608 | map->format.parse_val = regmap_parse_24; | |
609 | break; | |
7d5e525b | 610 | case 32: |
141eba2e SW |
611 | switch (val_endian) { |
612 | case REGMAP_ENDIAN_BIG: | |
613 | map->format.format_val = regmap_format_32_be; | |
614 | map->format.parse_val = regmap_parse_32_be; | |
8a819ff8 | 615 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
141eba2e SW |
616 | break; |
617 | case REGMAP_ENDIAN_NATIVE: | |
618 | map->format.format_val = regmap_format_32_native; | |
619 | map->format.parse_val = regmap_parse_32_native; | |
620 | break; | |
621 | default: | |
622 | goto err_map; | |
623 | } | |
7d5e525b | 624 | break; |
b83a313b MB |
625 | } |
626 | ||
141eba2e SW |
627 | if (map->format.format_write) { |
628 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
629 | (val_endian != REGMAP_ENDIAN_BIG)) | |
630 | goto err_map; | |
7a647614 | 631 | map->use_single_rw = true; |
141eba2e | 632 | } |
7a647614 | 633 | |
b83a313b MB |
634 | if (!map->format.format_write && |
635 | !(map->format.format_reg && map->format.format_val)) | |
636 | goto err_map; | |
637 | ||
82159ba8 | 638 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
639 | if (map->work_buf == NULL) { |
640 | ret = -ENOMEM; | |
5204f5e3 | 641 | goto err_map; |
b83a313b MB |
642 | } |
643 | ||
d2a5884a AS |
644 | if (map->format.format_write) { |
645 | map->defer_caching = false; | |
07c320dc | 646 | map->reg_write = _regmap_bus_formatted_write; |
d2a5884a AS |
647 | } else if (map->format.format_val) { |
648 | map->defer_caching = true; | |
07c320dc | 649 | map->reg_write = _regmap_bus_raw_write; |
d2a5884a AS |
650 | } |
651 | ||
652 | skip_format_initialization: | |
07c320dc | 653 | |
6863ca62 | 654 | map->range_tree = RB_ROOT; |
e3549cd0 | 655 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
656 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
657 | struct regmap_range_node *new; | |
658 | ||
659 | /* Sanity check */ | |
061adc06 MB |
660 | if (range_cfg->range_max < range_cfg->range_min) { |
661 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
662 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 663 | goto err_range; |
061adc06 MB |
664 | } |
665 | ||
666 | if (range_cfg->range_max > map->max_register) { | |
667 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
668 | range_cfg->range_max, map->max_register); | |
669 | goto err_range; | |
670 | } | |
671 | ||
672 | if (range_cfg->selector_reg > map->max_register) { | |
673 | dev_err(map->dev, | |
674 | "Invalid range %d: selector out of map\n", i); | |
675 | goto err_range; | |
676 | } | |
677 | ||
678 | if (range_cfg->window_len == 0) { | |
679 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
680 | i); | |
681 | goto err_range; | |
682 | } | |
6863ca62 KG |
683 | |
684 | /* Make sure, that this register range has no selector | |
685 | or data window within its boundary */ | |
e3549cd0 | 686 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
687 | unsigned sel_reg = config->ranges[j].selector_reg; |
688 | unsigned win_min = config->ranges[j].window_start; | |
689 | unsigned win_max = win_min + | |
690 | config->ranges[j].window_len - 1; | |
691 | ||
f161d220 PZ |
692 | /* Allow data window inside its own virtual range */ |
693 | if (j == i) | |
694 | continue; | |
695 | ||
6863ca62 KG |
696 | if (range_cfg->range_min <= sel_reg && |
697 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
698 | dev_err(map->dev, |
699 | "Range %d: selector for %d in window\n", | |
700 | i, j); | |
6863ca62 KG |
701 | goto err_range; |
702 | } | |
703 | ||
704 | if (!(win_max < range_cfg->range_min || | |
705 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
706 | dev_err(map->dev, |
707 | "Range %d: window for %d in window\n", | |
708 | i, j); | |
6863ca62 KG |
709 | goto err_range; |
710 | } | |
711 | } | |
712 | ||
713 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
714 | if (new == NULL) { | |
715 | ret = -ENOMEM; | |
716 | goto err_range; | |
717 | } | |
718 | ||
4b020b3f | 719 | new->map = map; |
d058bb49 | 720 | new->name = range_cfg->name; |
6863ca62 KG |
721 | new->range_min = range_cfg->range_min; |
722 | new->range_max = range_cfg->range_max; | |
723 | new->selector_reg = range_cfg->selector_reg; | |
724 | new->selector_mask = range_cfg->selector_mask; | |
725 | new->selector_shift = range_cfg->selector_shift; | |
726 | new->window_start = range_cfg->window_start; | |
727 | new->window_len = range_cfg->window_len; | |
728 | ||
729 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 730 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
731 | kfree(new); |
732 | goto err_range; | |
733 | } | |
734 | ||
735 | if (map->selector_work_buf == NULL) { | |
736 | map->selector_work_buf = | |
737 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
738 | if (map->selector_work_buf == NULL) { | |
739 | ret = -ENOMEM; | |
740 | goto err_range; | |
741 | } | |
742 | } | |
743 | } | |
052d2cd1 | 744 | |
c6432ea9 DP |
745 | regmap_debugfs_init(map, config->name); |
746 | ||
e5e3b8ab | 747 | ret = regcache_init(map, config); |
0ff3e62f | 748 | if (ret != 0) |
6863ca62 KG |
749 | goto err_range; |
750 | ||
72b39f6f MB |
751 | /* Add a devres resource for dev_get_regmap() */ |
752 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
753 | if (!m) { | |
754 | ret = -ENOMEM; | |
6863ca62 | 755 | goto err_debugfs; |
72b39f6f MB |
756 | } |
757 | *m = map; | |
758 | devres_add(dev, m); | |
759 | ||
b83a313b MB |
760 | return map; |
761 | ||
bfaa25f3 SW |
762 | err_debugfs: |
763 | regmap_debugfs_exit(map); | |
72b39f6f | 764 | regcache_exit(map); |
6863ca62 KG |
765 | err_range: |
766 | regmap_range_exit(map); | |
58072cbf | 767 | kfree(map->work_buf); |
b83a313b MB |
768 | err_map: |
769 | kfree(map); | |
770 | err: | |
771 | return ERR_PTR(ret); | |
772 | } | |
773 | EXPORT_SYMBOL_GPL(regmap_init); | |
774 | ||
c0eb4676 MB |
775 | static void devm_regmap_release(struct device *dev, void *res) |
776 | { | |
777 | regmap_exit(*(struct regmap **)res); | |
778 | } | |
779 | ||
780 | /** | |
781 | * devm_regmap_init(): Initialise managed register map | |
782 | * | |
783 | * @dev: Device that will be interacted with | |
784 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 785 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
786 | * @config: Configuration for register map |
787 | * | |
788 | * The return value will be an ERR_PTR() on error or a valid pointer | |
789 | * to a struct regmap. This function should generally not be called | |
790 | * directly, it should be called by bus-specific init functions. The | |
791 | * map will be automatically freed by the device management code. | |
792 | */ | |
793 | struct regmap *devm_regmap_init(struct device *dev, | |
794 | const struct regmap_bus *bus, | |
0135bbcc | 795 | void *bus_context, |
c0eb4676 MB |
796 | const struct regmap_config *config) |
797 | { | |
798 | struct regmap **ptr, *regmap; | |
799 | ||
800 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
801 | if (!ptr) | |
802 | return ERR_PTR(-ENOMEM); | |
803 | ||
0135bbcc | 804 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
805 | if (!IS_ERR(regmap)) { |
806 | *ptr = regmap; | |
807 | devres_add(dev, ptr); | |
808 | } else { | |
809 | devres_free(ptr); | |
810 | } | |
811 | ||
812 | return regmap; | |
813 | } | |
814 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
815 | ||
67252287 SK |
816 | static void regmap_field_init(struct regmap_field *rm_field, |
817 | struct regmap *regmap, struct reg_field reg_field) | |
818 | { | |
819 | int field_bits = reg_field.msb - reg_field.lsb + 1; | |
820 | rm_field->regmap = regmap; | |
821 | rm_field->reg = reg_field.reg; | |
822 | rm_field->shift = reg_field.lsb; | |
823 | rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); | |
824 | } | |
825 | ||
826 | /** | |
827 | * devm_regmap_field_alloc(): Allocate and initialise a register field | |
828 | * in a register map. | |
829 | * | |
830 | * @dev: Device that will be interacted with | |
831 | * @regmap: regmap bank in which this register field is located. | |
832 | * @reg_field: Register field with in the bank. | |
833 | * | |
834 | * The return value will be an ERR_PTR() on error or a valid pointer | |
835 | * to a struct regmap_field. The regmap_field will be automatically freed | |
836 | * by the device management code. | |
837 | */ | |
838 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, | |
839 | struct regmap *regmap, struct reg_field reg_field) | |
840 | { | |
841 | struct regmap_field *rm_field = devm_kzalloc(dev, | |
842 | sizeof(*rm_field), GFP_KERNEL); | |
843 | if (!rm_field) | |
844 | return ERR_PTR(-ENOMEM); | |
845 | ||
846 | regmap_field_init(rm_field, regmap, reg_field); | |
847 | ||
848 | return rm_field; | |
849 | ||
850 | } | |
851 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); | |
852 | ||
853 | /** | |
854 | * devm_regmap_field_free(): Free register field allocated using | |
855 | * devm_regmap_field_alloc. Usally drivers need not call this function, | |
856 | * as the memory allocated via devm will be freed as per device-driver | |
857 | * life-cyle. | |
858 | * | |
859 | * @dev: Device that will be interacted with | |
860 | * @field: regmap field which should be freed. | |
861 | */ | |
862 | void devm_regmap_field_free(struct device *dev, | |
863 | struct regmap_field *field) | |
864 | { | |
865 | devm_kfree(dev, field); | |
866 | } | |
867 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); | |
868 | ||
869 | /** | |
870 | * regmap_field_alloc(): Allocate and initialise a register field | |
871 | * in a register map. | |
872 | * | |
873 | * @regmap: regmap bank in which this register field is located. | |
874 | * @reg_field: Register field with in the bank. | |
875 | * | |
876 | * The return value will be an ERR_PTR() on error or a valid pointer | |
877 | * to a struct regmap_field. The regmap_field should be freed by the | |
878 | * user once its finished working with it using regmap_field_free(). | |
879 | */ | |
880 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, | |
881 | struct reg_field reg_field) | |
882 | { | |
883 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); | |
884 | ||
885 | if (!rm_field) | |
886 | return ERR_PTR(-ENOMEM); | |
887 | ||
888 | regmap_field_init(rm_field, regmap, reg_field); | |
889 | ||
890 | return rm_field; | |
891 | } | |
892 | EXPORT_SYMBOL_GPL(regmap_field_alloc); | |
893 | ||
894 | /** | |
895 | * regmap_field_free(): Free register field allocated using regmap_field_alloc | |
896 | * | |
897 | * @field: regmap field which should be freed. | |
898 | */ | |
899 | void regmap_field_free(struct regmap_field *field) | |
900 | { | |
901 | kfree(field); | |
902 | } | |
903 | EXPORT_SYMBOL_GPL(regmap_field_free); | |
904 | ||
bf315173 MB |
905 | /** |
906 | * regmap_reinit_cache(): Reinitialise the current register cache | |
907 | * | |
908 | * @map: Register map to operate on. | |
909 | * @config: New configuration. Only the cache data will be used. | |
910 | * | |
911 | * Discard any existing register cache for the map and initialize a | |
912 | * new cache. This can be used to restore the cache to defaults or to | |
913 | * update the cache configuration to reflect runtime discovery of the | |
914 | * hardware. | |
4d879514 DP |
915 | * |
916 | * No explicit locking is done here, the user needs to ensure that | |
917 | * this function will not race with other calls to regmap. | |
bf315173 MB |
918 | */ |
919 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
920 | { | |
bf315173 | 921 | regcache_exit(map); |
a24f64a6 | 922 | regmap_debugfs_exit(map); |
bf315173 MB |
923 | |
924 | map->max_register = config->max_register; | |
925 | map->writeable_reg = config->writeable_reg; | |
926 | map->readable_reg = config->readable_reg; | |
927 | map->volatile_reg = config->volatile_reg; | |
928 | map->precious_reg = config->precious_reg; | |
929 | map->cache_type = config->cache_type; | |
930 | ||
d3c242e1 | 931 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 932 | |
421e8d2d MB |
933 | map->cache_bypass = false; |
934 | map->cache_only = false; | |
935 | ||
4d879514 | 936 | return regcache_init(map, config); |
bf315173 | 937 | } |
752a6a5f | 938 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 939 | |
b83a313b MB |
940 | /** |
941 | * regmap_exit(): Free a previously allocated register map | |
942 | */ | |
943 | void regmap_exit(struct regmap *map) | |
944 | { | |
5d1729e7 | 945 | regcache_exit(map); |
31244e39 | 946 | regmap_debugfs_exit(map); |
6863ca62 | 947 | regmap_range_exit(map); |
d2a5884a | 948 | if (map->bus && map->bus->free_context) |
0135bbcc | 949 | map->bus->free_context(map->bus_context); |
b83a313b | 950 | kfree(map->work_buf); |
b83a313b MB |
951 | kfree(map); |
952 | } | |
953 | EXPORT_SYMBOL_GPL(regmap_exit); | |
954 | ||
72b39f6f MB |
955 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
956 | { | |
957 | struct regmap **r = res; | |
958 | if (!r || !*r) { | |
959 | WARN_ON(!r || !*r); | |
960 | return 0; | |
961 | } | |
962 | ||
963 | /* If the user didn't specify a name match any */ | |
964 | if (data) | |
965 | return (*r)->name == data; | |
966 | else | |
967 | return 1; | |
968 | } | |
969 | ||
970 | /** | |
971 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
972 | * | |
973 | * @dev: Device to retrieve the map for | |
974 | * @name: Optional name for the register map, usually NULL. | |
975 | * | |
976 | * Returns the regmap for the device if one is present, or NULL. If | |
977 | * name is specified then it must match the name specified when | |
978 | * registering the device, if it is NULL then the first regmap found | |
979 | * will be used. Devices with multiple register maps are very rare, | |
980 | * generic code should normally not need to specify a name. | |
981 | */ | |
982 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
983 | { | |
984 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
985 | dev_get_regmap_match, (void *)name); | |
986 | ||
987 | if (!r) | |
988 | return NULL; | |
989 | return *r; | |
990 | } | |
991 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
992 | ||
6863ca62 | 993 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 994 | struct regmap_range_node *range, |
6863ca62 KG |
995 | unsigned int val_num) |
996 | { | |
6863ca62 KG |
997 | void *orig_work_buf; |
998 | unsigned int win_offset; | |
999 | unsigned int win_page; | |
1000 | bool page_chg; | |
1001 | int ret; | |
1002 | ||
98bc7dfd MB |
1003 | win_offset = (*reg - range->range_min) % range->window_len; |
1004 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 1005 | |
98bc7dfd MB |
1006 | if (val_num > 1) { |
1007 | /* Bulk write shouldn't cross range boundary */ | |
1008 | if (*reg + val_num - 1 > range->range_max) | |
1009 | return -EINVAL; | |
6863ca62 | 1010 | |
98bc7dfd MB |
1011 | /* ... or single page boundary */ |
1012 | if (val_num > range->window_len - win_offset) | |
1013 | return -EINVAL; | |
1014 | } | |
6863ca62 | 1015 | |
98bc7dfd MB |
1016 | /* It is possible to have selector register inside data window. |
1017 | In that case, selector register is located on every page and | |
1018 | it needs no page switching, when accessed alone. */ | |
1019 | if (val_num > 1 || | |
1020 | range->window_start + win_offset != range->selector_reg) { | |
1021 | /* Use separate work_buf during page switching */ | |
1022 | orig_work_buf = map->work_buf; | |
1023 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 1024 | |
98bc7dfd MB |
1025 | ret = _regmap_update_bits(map, range->selector_reg, |
1026 | range->selector_mask, | |
1027 | win_page << range->selector_shift, | |
1028 | &page_chg); | |
632a5b01 | 1029 | |
98bc7dfd | 1030 | map->work_buf = orig_work_buf; |
6863ca62 | 1031 | |
0ff3e62f | 1032 | if (ret != 0) |
98bc7dfd | 1033 | return ret; |
6863ca62 KG |
1034 | } |
1035 | ||
98bc7dfd MB |
1036 | *reg = range->window_start + win_offset; |
1037 | ||
6863ca62 KG |
1038 | return 0; |
1039 | } | |
1040 | ||
584de329 MB |
1041 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
1042 | const void *val, size_t val_len, bool async) | |
b83a313b | 1043 | { |
98bc7dfd | 1044 | struct regmap_range_node *range; |
0d509f2b | 1045 | unsigned long flags; |
6f306441 | 1046 | u8 *u8 = map->work_buf; |
0d509f2b MB |
1047 | void *work_val = map->work_buf + map->format.reg_bytes + |
1048 | map->format.pad_bytes; | |
b83a313b MB |
1049 | void *buf; |
1050 | int ret = -ENOTSUPP; | |
1051 | size_t len; | |
73304781 MB |
1052 | int i; |
1053 | ||
f1b5c5c3 | 1054 | WARN_ON(!map->bus); |
d2a5884a | 1055 | |
73304781 MB |
1056 | /* Check for unwritable registers before we start */ |
1057 | if (map->writeable_reg) | |
1058 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
1059 | if (!map->writeable_reg(map->dev, |
1060 | reg + (i * map->reg_stride))) | |
73304781 | 1061 | return -EINVAL; |
b83a313b | 1062 | |
c9157198 LD |
1063 | if (!map->cache_bypass && map->format.parse_val) { |
1064 | unsigned int ival; | |
1065 | int val_bytes = map->format.val_bytes; | |
1066 | for (i = 0; i < val_len / val_bytes; i++) { | |
5a08d156 | 1067 | ival = map->format.parse_val(val + (i * val_bytes)); |
f01ee60f SW |
1068 | ret = regcache_write(map, reg + (i * map->reg_stride), |
1069 | ival); | |
c9157198 LD |
1070 | if (ret) { |
1071 | dev_err(map->dev, | |
6d04b8ac | 1072 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
1073 | reg + i, ret); |
1074 | return ret; | |
1075 | } | |
1076 | } | |
1077 | if (map->cache_only) { | |
1078 | map->cache_dirty = true; | |
1079 | return 0; | |
1080 | } | |
1081 | } | |
1082 | ||
98bc7dfd MB |
1083 | range = _regmap_range_lookup(map, reg); |
1084 | if (range) { | |
8a2ceac6 MB |
1085 | int val_num = val_len / map->format.val_bytes; |
1086 | int win_offset = (reg - range->range_min) % range->window_len; | |
1087 | int win_residue = range->window_len - win_offset; | |
1088 | ||
1089 | /* If the write goes beyond the end of the window split it */ | |
1090 | while (val_num > win_residue) { | |
1a61cfe3 | 1091 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
1092 | win_residue, val_len / map->format.val_bytes); |
1093 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
0d509f2b | 1094 | map->format.val_bytes, async); |
8a2ceac6 MB |
1095 | if (ret != 0) |
1096 | return ret; | |
1097 | ||
1098 | reg += win_residue; | |
1099 | val_num -= win_residue; | |
1100 | val += win_residue * map->format.val_bytes; | |
1101 | val_len -= win_residue * map->format.val_bytes; | |
1102 | ||
1103 | win_offset = (reg - range->range_min) % | |
1104 | range->window_len; | |
1105 | win_residue = range->window_len - win_offset; | |
1106 | } | |
1107 | ||
1108 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 1109 | if (ret != 0) |
98bc7dfd MB |
1110 | return ret; |
1111 | } | |
6863ca62 | 1112 | |
d939fb9a | 1113 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 1114 | |
6f306441 LPC |
1115 | u8[0] |= map->write_flag_mask; |
1116 | ||
0d509f2b MB |
1117 | if (async && map->bus->async_write) { |
1118 | struct regmap_async *async = map->bus->async_alloc(); | |
1119 | if (!async) | |
1120 | return -ENOMEM; | |
1121 | ||
fe7d4ccd MB |
1122 | trace_regmap_async_write_start(map->dev, reg, val_len); |
1123 | ||
0d509f2b MB |
1124 | async->work_buf = kzalloc(map->format.buf_size, |
1125 | GFP_KERNEL | GFP_DMA); | |
1126 | if (!async->work_buf) { | |
1127 | kfree(async); | |
1128 | return -ENOMEM; | |
1129 | } | |
1130 | ||
1131 | INIT_WORK(&async->cleanup, async_cleanup); | |
1132 | async->map = map; | |
1133 | ||
1134 | /* If the caller supplied the value we can use it safely. */ | |
1135 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + | |
1136 | map->format.reg_bytes + map->format.val_bytes); | |
1137 | if (val == work_val) | |
1138 | val = async->work_buf + map->format.pad_bytes + | |
1139 | map->format.reg_bytes; | |
1140 | ||
1141 | spin_lock_irqsave(&map->async_lock, flags); | |
1142 | list_add_tail(&async->list, &map->async_list); | |
1143 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1144 | ||
1145 | ret = map->bus->async_write(map->bus_context, async->work_buf, | |
1146 | map->format.reg_bytes + | |
1147 | map->format.pad_bytes, | |
1148 | val, val_len, async); | |
1149 | ||
1150 | if (ret != 0) { | |
1151 | dev_err(map->dev, "Failed to schedule write: %d\n", | |
1152 | ret); | |
1153 | ||
1154 | spin_lock_irqsave(&map->async_lock, flags); | |
1155 | list_del(&async->list); | |
1156 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1157 | ||
1158 | kfree(async->work_buf); | |
1159 | kfree(async); | |
1160 | } | |
f951b658 MB |
1161 | |
1162 | return ret; | |
0d509f2b MB |
1163 | } |
1164 | ||
fb2736bb MB |
1165 | trace_regmap_hw_write_start(map->dev, reg, |
1166 | val_len / map->format.val_bytes); | |
1167 | ||
2547e201 MB |
1168 | /* If we're doing a single register write we can probably just |
1169 | * send the work_buf directly, otherwise try to do a gather | |
1170 | * write. | |
1171 | */ | |
0d509f2b | 1172 | if (val == work_val) |
0135bbcc | 1173 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
1174 | map->format.reg_bytes + |
1175 | map->format.pad_bytes + | |
1176 | val_len); | |
2547e201 | 1177 | else if (map->bus->gather_write) |
0135bbcc | 1178 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
1179 | map->format.reg_bytes + |
1180 | map->format.pad_bytes, | |
b83a313b MB |
1181 | val, val_len); |
1182 | ||
2547e201 | 1183 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 1184 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
1185 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
1186 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
1187 | if (!buf) |
1188 | return -ENOMEM; | |
1189 | ||
1190 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
1191 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
1192 | val, val_len); | |
0135bbcc | 1193 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
1194 | |
1195 | kfree(buf); | |
1196 | } | |
1197 | ||
fb2736bb MB |
1198 | trace_regmap_hw_write_done(map->dev, reg, |
1199 | val_len / map->format.val_bytes); | |
1200 | ||
b83a313b MB |
1201 | return ret; |
1202 | } | |
1203 | ||
221ad7f2 MB |
1204 | /** |
1205 | * regmap_can_raw_write - Test if regmap_raw_write() is supported | |
1206 | * | |
1207 | * @map: Map to check. | |
1208 | */ | |
1209 | bool regmap_can_raw_write(struct regmap *map) | |
1210 | { | |
1211 | return map->bus && map->format.format_val && map->format.format_reg; | |
1212 | } | |
1213 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); | |
1214 | ||
07c320dc AS |
1215 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
1216 | unsigned int val) | |
1217 | { | |
1218 | int ret; | |
1219 | struct regmap_range_node *range; | |
1220 | struct regmap *map = context; | |
1221 | ||
f1b5c5c3 | 1222 | WARN_ON(!map->bus || !map->format.format_write); |
07c320dc AS |
1223 | |
1224 | range = _regmap_range_lookup(map, reg); | |
1225 | if (range) { | |
1226 | ret = _regmap_select_page(map, ®, range, 1); | |
1227 | if (ret != 0) | |
1228 | return ret; | |
1229 | } | |
1230 | ||
1231 | map->format.format_write(map, reg, val); | |
1232 | ||
1233 | trace_regmap_hw_write_start(map->dev, reg, 1); | |
1234 | ||
1235 | ret = map->bus->write(map->bus_context, map->work_buf, | |
1236 | map->format.buf_size); | |
1237 | ||
1238 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1239 | ||
1240 | return ret; | |
1241 | } | |
1242 | ||
1243 | static int _regmap_bus_raw_write(void *context, unsigned int reg, | |
1244 | unsigned int val) | |
1245 | { | |
1246 | struct regmap *map = context; | |
1247 | ||
f1b5c5c3 | 1248 | WARN_ON(!map->bus || !map->format.format_val); |
07c320dc AS |
1249 | |
1250 | map->format.format_val(map->work_buf + map->format.reg_bytes | |
1251 | + map->format.pad_bytes, val, 0); | |
1252 | return _regmap_raw_write(map, reg, | |
1253 | map->work_buf + | |
1254 | map->format.reg_bytes + | |
1255 | map->format.pad_bytes, | |
0d509f2b | 1256 | map->format.val_bytes, false); |
07c320dc AS |
1257 | } |
1258 | ||
d2a5884a AS |
1259 | static inline void *_regmap_map_get_context(struct regmap *map) |
1260 | { | |
1261 | return (map->bus) ? map : map->bus_context; | |
1262 | } | |
1263 | ||
4d2dc095 DP |
1264 | int _regmap_write(struct regmap *map, unsigned int reg, |
1265 | unsigned int val) | |
b83a313b | 1266 | { |
fb2736bb | 1267 | int ret; |
d2a5884a | 1268 | void *context = _regmap_map_get_context(map); |
b83a313b | 1269 | |
515f2261 IN |
1270 | if (!regmap_writeable(map, reg)) |
1271 | return -EIO; | |
1272 | ||
d2a5884a | 1273 | if (!map->cache_bypass && !map->defer_caching) { |
5d1729e7 DP |
1274 | ret = regcache_write(map, reg, val); |
1275 | if (ret != 0) | |
1276 | return ret; | |
8ae0d7e8 MB |
1277 | if (map->cache_only) { |
1278 | map->cache_dirty = true; | |
5d1729e7 | 1279 | return 0; |
8ae0d7e8 | 1280 | } |
5d1729e7 DP |
1281 | } |
1282 | ||
1044c180 MB |
1283 | #ifdef LOG_DEVICE |
1284 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1285 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1286 | #endif | |
1287 | ||
fb2736bb MB |
1288 | trace_regmap_reg_write(map->dev, reg, val); |
1289 | ||
d2a5884a | 1290 | return map->reg_write(context, reg, val); |
b83a313b MB |
1291 | } |
1292 | ||
1293 | /** | |
1294 | * regmap_write(): Write a value to a single register | |
1295 | * | |
1296 | * @map: Register map to write to | |
1297 | * @reg: Register to write to | |
1298 | * @val: Value to be written | |
1299 | * | |
1300 | * A value of zero will be returned on success, a negative errno will | |
1301 | * be returned in error cases. | |
1302 | */ | |
1303 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1304 | { | |
1305 | int ret; | |
1306 | ||
f01ee60f SW |
1307 | if (reg % map->reg_stride) |
1308 | return -EINVAL; | |
1309 | ||
0d4529c5 | 1310 | map->lock(map->lock_arg); |
b83a313b MB |
1311 | |
1312 | ret = _regmap_write(map, reg, val); | |
1313 | ||
0d4529c5 | 1314 | map->unlock(map->lock_arg); |
b83a313b MB |
1315 | |
1316 | return ret; | |
1317 | } | |
1318 | EXPORT_SYMBOL_GPL(regmap_write); | |
1319 | ||
1320 | /** | |
1321 | * regmap_raw_write(): Write raw values to one or more registers | |
1322 | * | |
1323 | * @map: Register map to write to | |
1324 | * @reg: Initial register to write to | |
1325 | * @val: Block of data to be written, laid out for direct transmission to the | |
1326 | * device | |
1327 | * @val_len: Length of data pointed to by val. | |
1328 | * | |
1329 | * This function is intended to be used for things like firmware | |
1330 | * download where a large block of data needs to be transferred to the | |
1331 | * device. No formatting will be done on the data provided. | |
1332 | * | |
1333 | * A value of zero will be returned on success, a negative errno will | |
1334 | * be returned in error cases. | |
1335 | */ | |
1336 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1337 | const void *val, size_t val_len) | |
1338 | { | |
1339 | int ret; | |
1340 | ||
221ad7f2 | 1341 | if (!regmap_can_raw_write(map)) |
d2a5884a | 1342 | return -EINVAL; |
851960ba SW |
1343 | if (val_len % map->format.val_bytes) |
1344 | return -EINVAL; | |
1345 | ||
0d4529c5 | 1346 | map->lock(map->lock_arg); |
b83a313b | 1347 | |
0d509f2b | 1348 | ret = _regmap_raw_write(map, reg, val, val_len, false); |
b83a313b | 1349 | |
0d4529c5 | 1350 | map->unlock(map->lock_arg); |
b83a313b MB |
1351 | |
1352 | return ret; | |
1353 | } | |
1354 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1355 | ||
67252287 SK |
1356 | /** |
1357 | * regmap_field_write(): Write a value to a single register field | |
1358 | * | |
1359 | * @field: Register field to write to | |
1360 | * @val: Value to be written | |
1361 | * | |
1362 | * A value of zero will be returned on success, a negative errno will | |
1363 | * be returned in error cases. | |
1364 | */ | |
1365 | int regmap_field_write(struct regmap_field *field, unsigned int val) | |
1366 | { | |
1367 | return regmap_update_bits(field->regmap, field->reg, | |
1368 | field->mask, val << field->shift); | |
1369 | } | |
1370 | EXPORT_SYMBOL_GPL(regmap_field_write); | |
1371 | ||
8eaeb219 LD |
1372 | /* |
1373 | * regmap_bulk_write(): Write multiple registers to the device | |
1374 | * | |
1375 | * @map: Register map to write to | |
1376 | * @reg: First register to be write from | |
1377 | * @val: Block of data to be written, in native register size for device | |
1378 | * @val_count: Number of registers to write | |
1379 | * | |
1380 | * This function is intended to be used for writing a large block of | |
31b35e9e | 1381 | * data to the device either in single transfer or multiple transfer. |
8eaeb219 LD |
1382 | * |
1383 | * A value of zero will be returned on success, a negative errno will | |
1384 | * be returned in error cases. | |
1385 | */ | |
1386 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1387 | size_t val_count) | |
1388 | { | |
1389 | int ret = 0, i; | |
1390 | size_t val_bytes = map->format.val_bytes; | |
1391 | void *wval; | |
1392 | ||
d2a5884a AS |
1393 | if (!map->bus) |
1394 | return -EINVAL; | |
8a819ff8 | 1395 | if (!map->format.parse_inplace) |
8eaeb219 | 1396 | return -EINVAL; |
f01ee60f SW |
1397 | if (reg % map->reg_stride) |
1398 | return -EINVAL; | |
8eaeb219 | 1399 | |
0d4529c5 | 1400 | map->lock(map->lock_arg); |
8eaeb219 LD |
1401 | |
1402 | /* No formatting is require if val_byte is 1 */ | |
1403 | if (val_bytes == 1) { | |
1404 | wval = (void *)val; | |
1405 | } else { | |
1406 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1407 | if (!wval) { | |
1408 | ret = -ENOMEM; | |
1409 | dev_err(map->dev, "Error in memory allocation\n"); | |
1410 | goto out; | |
1411 | } | |
1412 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1413 | map->format.parse_inplace(wval + i); |
8eaeb219 | 1414 | } |
2e33caf1 AJ |
1415 | /* |
1416 | * Some devices does not support bulk write, for | |
1417 | * them we have a series of single write operations. | |
1418 | */ | |
1419 | if (map->use_single_rw) { | |
1420 | for (i = 0; i < val_count; i++) { | |
1421 | ret = regmap_raw_write(map, | |
0d509f2b MB |
1422 | reg + (i * map->reg_stride), |
1423 | val + (i * val_bytes), | |
1424 | val_bytes); | |
2e33caf1 AJ |
1425 | if (ret != 0) |
1426 | return ret; | |
1427 | } | |
1428 | } else { | |
0d509f2b MB |
1429 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count, |
1430 | false); | |
2e33caf1 | 1431 | } |
8eaeb219 LD |
1432 | |
1433 | if (val_bytes != 1) | |
1434 | kfree(wval); | |
1435 | ||
1436 | out: | |
0d4529c5 | 1437 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1438 | return ret; |
1439 | } | |
1440 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1441 | ||
0d509f2b MB |
1442 | /** |
1443 | * regmap_raw_write_async(): Write raw values to one or more registers | |
1444 | * asynchronously | |
1445 | * | |
1446 | * @map: Register map to write to | |
1447 | * @reg: Initial register to write to | |
1448 | * @val: Block of data to be written, laid out for direct transmission to the | |
1449 | * device. Must be valid until regmap_async_complete() is called. | |
1450 | * @val_len: Length of data pointed to by val. | |
1451 | * | |
1452 | * This function is intended to be used for things like firmware | |
1453 | * download where a large block of data needs to be transferred to the | |
1454 | * device. No formatting will be done on the data provided. | |
1455 | * | |
1456 | * If supported by the underlying bus the write will be scheduled | |
1457 | * asynchronously, helping maximise I/O speed on higher speed buses | |
1458 | * like SPI. regmap_async_complete() can be called to ensure that all | |
1459 | * asynchrnous writes have been completed. | |
1460 | * | |
1461 | * A value of zero will be returned on success, a negative errno will | |
1462 | * be returned in error cases. | |
1463 | */ | |
1464 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, | |
1465 | const void *val, size_t val_len) | |
1466 | { | |
1467 | int ret; | |
1468 | ||
1469 | if (val_len % map->format.val_bytes) | |
1470 | return -EINVAL; | |
1471 | if (reg % map->reg_stride) | |
1472 | return -EINVAL; | |
1473 | ||
1474 | map->lock(map->lock_arg); | |
1475 | ||
1476 | ret = _regmap_raw_write(map, reg, val, val_len, true); | |
1477 | ||
1478 | map->unlock(map->lock_arg); | |
1479 | ||
1480 | return ret; | |
1481 | } | |
1482 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); | |
1483 | ||
b83a313b MB |
1484 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1485 | unsigned int val_len) | |
1486 | { | |
98bc7dfd | 1487 | struct regmap_range_node *range; |
b83a313b MB |
1488 | u8 *u8 = map->work_buf; |
1489 | int ret; | |
1490 | ||
f1b5c5c3 | 1491 | WARN_ON(!map->bus); |
d2a5884a | 1492 | |
98bc7dfd MB |
1493 | range = _regmap_range_lookup(map, reg); |
1494 | if (range) { | |
1495 | ret = _regmap_select_page(map, ®, range, | |
1496 | val_len / map->format.val_bytes); | |
0ff3e62f | 1497 | if (ret != 0) |
98bc7dfd MB |
1498 | return ret; |
1499 | } | |
6863ca62 | 1500 | |
d939fb9a | 1501 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1502 | |
1503 | /* | |
6f306441 | 1504 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1505 | * register addresss; since it's always the high bits for all |
1506 | * current formats we can do this here rather than in | |
1507 | * formatting. This may break if we get interesting formats. | |
1508 | */ | |
6f306441 | 1509 | u8[0] |= map->read_flag_mask; |
b83a313b | 1510 | |
fb2736bb MB |
1511 | trace_regmap_hw_read_start(map->dev, reg, |
1512 | val_len / map->format.val_bytes); | |
1513 | ||
0135bbcc | 1514 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1515 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1516 | val, val_len); |
b83a313b | 1517 | |
fb2736bb MB |
1518 | trace_regmap_hw_read_done(map->dev, reg, |
1519 | val_len / map->format.val_bytes); | |
1520 | ||
1521 | return ret; | |
b83a313b MB |
1522 | } |
1523 | ||
ad278406 AS |
1524 | static int _regmap_bus_read(void *context, unsigned int reg, |
1525 | unsigned int *val) | |
1526 | { | |
1527 | int ret; | |
1528 | struct regmap *map = context; | |
1529 | ||
1530 | if (!map->format.parse_val) | |
1531 | return -EINVAL; | |
1532 | ||
1533 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); | |
1534 | if (ret == 0) | |
1535 | *val = map->format.parse_val(map->work_buf); | |
1536 | ||
1537 | return ret; | |
1538 | } | |
1539 | ||
b83a313b MB |
1540 | static int _regmap_read(struct regmap *map, unsigned int reg, |
1541 | unsigned int *val) | |
1542 | { | |
1543 | int ret; | |
d2a5884a AS |
1544 | void *context = _regmap_map_get_context(map); |
1545 | ||
f1b5c5c3 | 1546 | WARN_ON(!map->reg_read); |
b83a313b | 1547 | |
5d1729e7 DP |
1548 | if (!map->cache_bypass) { |
1549 | ret = regcache_read(map, reg, val); | |
1550 | if (ret == 0) | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | if (map->cache_only) | |
1555 | return -EBUSY; | |
1556 | ||
d2a5884a | 1557 | ret = map->reg_read(context, reg, val); |
fb2736bb | 1558 | if (ret == 0) { |
1044c180 MB |
1559 | #ifdef LOG_DEVICE |
1560 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1561 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1562 | #endif | |
1563 | ||
fb2736bb | 1564 | trace_regmap_reg_read(map->dev, reg, *val); |
b83a313b | 1565 | |
ad278406 AS |
1566 | if (!map->cache_bypass) |
1567 | regcache_write(map, reg, *val); | |
1568 | } | |
f2985367 | 1569 | |
b83a313b MB |
1570 | return ret; |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * regmap_read(): Read a value from a single register | |
1575 | * | |
1576 | * @map: Register map to write to | |
1577 | * @reg: Register to be read from | |
1578 | * @val: Pointer to store read value | |
1579 | * | |
1580 | * A value of zero will be returned on success, a negative errno will | |
1581 | * be returned in error cases. | |
1582 | */ | |
1583 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1584 | { | |
1585 | int ret; | |
1586 | ||
f01ee60f SW |
1587 | if (reg % map->reg_stride) |
1588 | return -EINVAL; | |
1589 | ||
0d4529c5 | 1590 | map->lock(map->lock_arg); |
b83a313b MB |
1591 | |
1592 | ret = _regmap_read(map, reg, val); | |
1593 | ||
0d4529c5 | 1594 | map->unlock(map->lock_arg); |
b83a313b MB |
1595 | |
1596 | return ret; | |
1597 | } | |
1598 | EXPORT_SYMBOL_GPL(regmap_read); | |
1599 | ||
1600 | /** | |
1601 | * regmap_raw_read(): Read raw data from the device | |
1602 | * | |
1603 | * @map: Register map to write to | |
1604 | * @reg: First register to be read from | |
1605 | * @val: Pointer to store read value | |
1606 | * @val_len: Size of data to read | |
1607 | * | |
1608 | * A value of zero will be returned on success, a negative errno will | |
1609 | * be returned in error cases. | |
1610 | */ | |
1611 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1612 | size_t val_len) | |
1613 | { | |
b8fb5ab1 MB |
1614 | size_t val_bytes = map->format.val_bytes; |
1615 | size_t val_count = val_len / val_bytes; | |
1616 | unsigned int v; | |
1617 | int ret, i; | |
04e016ad | 1618 | |
d2a5884a AS |
1619 | if (!map->bus) |
1620 | return -EINVAL; | |
851960ba SW |
1621 | if (val_len % map->format.val_bytes) |
1622 | return -EINVAL; | |
f01ee60f SW |
1623 | if (reg % map->reg_stride) |
1624 | return -EINVAL; | |
851960ba | 1625 | |
0d4529c5 | 1626 | map->lock(map->lock_arg); |
b83a313b | 1627 | |
b8fb5ab1 MB |
1628 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1629 | map->cache_type == REGCACHE_NONE) { | |
1630 | /* Physical block read if there's no cache involved */ | |
1631 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1632 | ||
1633 | } else { | |
1634 | /* Otherwise go word by word for the cache; should be low | |
1635 | * cost as we expect to hit the cache. | |
1636 | */ | |
1637 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1638 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1639 | &v); | |
b8fb5ab1 MB |
1640 | if (ret != 0) |
1641 | goto out; | |
1642 | ||
d939fb9a | 1643 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1644 | } |
1645 | } | |
b83a313b | 1646 | |
b8fb5ab1 | 1647 | out: |
0d4529c5 | 1648 | map->unlock(map->lock_arg); |
b83a313b MB |
1649 | |
1650 | return ret; | |
1651 | } | |
1652 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1653 | ||
67252287 SK |
1654 | /** |
1655 | * regmap_field_read(): Read a value to a single register field | |
1656 | * | |
1657 | * @field: Register field to read from | |
1658 | * @val: Pointer to store read value | |
1659 | * | |
1660 | * A value of zero will be returned on success, a negative errno will | |
1661 | * be returned in error cases. | |
1662 | */ | |
1663 | int regmap_field_read(struct regmap_field *field, unsigned int *val) | |
1664 | { | |
1665 | int ret; | |
1666 | unsigned int reg_val; | |
1667 | ret = regmap_read(field->regmap, field->reg, ®_val); | |
1668 | if (ret != 0) | |
1669 | return ret; | |
1670 | ||
1671 | reg_val &= field->mask; | |
1672 | reg_val >>= field->shift; | |
1673 | *val = reg_val; | |
1674 | ||
1675 | return ret; | |
1676 | } | |
1677 | EXPORT_SYMBOL_GPL(regmap_field_read); | |
1678 | ||
b83a313b MB |
1679 | /** |
1680 | * regmap_bulk_read(): Read multiple registers from the device | |
1681 | * | |
1682 | * @map: Register map to write to | |
1683 | * @reg: First register to be read from | |
1684 | * @val: Pointer to store read value, in native register size for device | |
1685 | * @val_count: Number of registers to read | |
1686 | * | |
1687 | * A value of zero will be returned on success, a negative errno will | |
1688 | * be returned in error cases. | |
1689 | */ | |
1690 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1691 | size_t val_count) | |
1692 | { | |
1693 | int ret, i; | |
1694 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1695 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1696 | |
d2a5884a AS |
1697 | if (!map->bus) |
1698 | return -EINVAL; | |
8a819ff8 | 1699 | if (!map->format.parse_inplace) |
b83a313b | 1700 | return -EINVAL; |
f01ee60f SW |
1701 | if (reg % map->reg_stride) |
1702 | return -EINVAL; | |
b83a313b | 1703 | |
de2d808f | 1704 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1705 | /* |
1706 | * Some devices does not support bulk read, for | |
1707 | * them we have a series of single read operations. | |
1708 | */ | |
1709 | if (map->use_single_rw) { | |
1710 | for (i = 0; i < val_count; i++) { | |
1711 | ret = regmap_raw_read(map, | |
1712 | reg + (i * map->reg_stride), | |
1713 | val + (i * val_bytes), | |
1714 | val_bytes); | |
1715 | if (ret != 0) | |
1716 | return ret; | |
1717 | } | |
1718 | } else { | |
1719 | ret = regmap_raw_read(map, reg, val, | |
1720 | val_bytes * val_count); | |
1721 | if (ret != 0) | |
1722 | return ret; | |
1723 | } | |
de2d808f MB |
1724 | |
1725 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
8a819ff8 | 1726 | map->format.parse_inplace(val + i); |
de2d808f MB |
1727 | } else { |
1728 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1729 | unsigned int ival; |
f01ee60f | 1730 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1731 | &ival); |
de2d808f MB |
1732 | if (ret != 0) |
1733 | return ret; | |
6560ffd1 | 1734 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1735 | } |
1736 | } | |
b83a313b MB |
1737 | |
1738 | return 0; | |
1739 | } | |
1740 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1741 | ||
018690d3 MB |
1742 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1743 | unsigned int mask, unsigned int val, | |
1744 | bool *change) | |
b83a313b MB |
1745 | { |
1746 | int ret; | |
d91e8db2 | 1747 | unsigned int tmp, orig; |
b83a313b | 1748 | |
d91e8db2 | 1749 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1750 | if (ret != 0) |
fc3ebd78 | 1751 | return ret; |
b83a313b | 1752 | |
d91e8db2 | 1753 | tmp = orig & ~mask; |
b83a313b MB |
1754 | tmp |= val & mask; |
1755 | ||
018690d3 | 1756 | if (tmp != orig) { |
d91e8db2 | 1757 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1758 | *change = true; |
1759 | } else { | |
1760 | *change = false; | |
1761 | } | |
b83a313b | 1762 | |
b83a313b MB |
1763 | return ret; |
1764 | } | |
018690d3 MB |
1765 | |
1766 | /** | |
1767 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1768 | * | |
1769 | * @map: Register map to update | |
1770 | * @reg: Register to update | |
1771 | * @mask: Bitmask to change | |
1772 | * @val: New value for bitmask | |
1773 | * | |
1774 | * Returns zero for success, a negative number on error. | |
1775 | */ | |
1776 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1777 | unsigned int mask, unsigned int val) | |
1778 | { | |
1779 | bool change; | |
fc3ebd78 KG |
1780 | int ret; |
1781 | ||
0d4529c5 | 1782 | map->lock(map->lock_arg); |
fc3ebd78 | 1783 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1784 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1785 | |
1786 | return ret; | |
018690d3 | 1787 | } |
b83a313b | 1788 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1789 | |
018690d3 MB |
1790 | /** |
1791 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1792 | * register map and report if updated | |
1793 | * | |
1794 | * @map: Register map to update | |
1795 | * @reg: Register to update | |
1796 | * @mask: Bitmask to change | |
1797 | * @val: New value for bitmask | |
1798 | * @change: Boolean indicating if a write was done | |
1799 | * | |
1800 | * Returns zero for success, a negative number on error. | |
1801 | */ | |
1802 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1803 | unsigned int mask, unsigned int val, | |
1804 | bool *change) | |
1805 | { | |
fc3ebd78 KG |
1806 | int ret; |
1807 | ||
0d4529c5 | 1808 | map->lock(map->lock_arg); |
fc3ebd78 | 1809 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1810 | map->unlock(map->lock_arg); |
fc3ebd78 | 1811 | return ret; |
018690d3 MB |
1812 | } |
1813 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1814 | ||
0d509f2b MB |
1815 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
1816 | { | |
1817 | struct regmap *map = async->map; | |
1818 | bool wake; | |
1819 | ||
fe7d4ccd MB |
1820 | trace_regmap_async_io_complete(map->dev); |
1821 | ||
0d509f2b MB |
1822 | spin_lock(&map->async_lock); |
1823 | ||
1824 | list_del(&async->list); | |
1825 | wake = list_empty(&map->async_list); | |
1826 | ||
1827 | if (ret != 0) | |
1828 | map->async_ret = ret; | |
1829 | ||
1830 | spin_unlock(&map->async_lock); | |
1831 | ||
1832 | schedule_work(&async->cleanup); | |
1833 | ||
1834 | if (wake) | |
1835 | wake_up(&map->async_waitq); | |
1836 | } | |
f804fb56 | 1837 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
0d509f2b MB |
1838 | |
1839 | static int regmap_async_is_done(struct regmap *map) | |
1840 | { | |
1841 | unsigned long flags; | |
1842 | int ret; | |
1843 | ||
1844 | spin_lock_irqsave(&map->async_lock, flags); | |
1845 | ret = list_empty(&map->async_list); | |
1846 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1847 | ||
1848 | return ret; | |
1849 | } | |
1850 | ||
1851 | /** | |
1852 | * regmap_async_complete: Ensure all asynchronous I/O has completed. | |
1853 | * | |
1854 | * @map: Map to operate on. | |
1855 | * | |
1856 | * Blocks until any pending asynchronous I/O has completed. Returns | |
1857 | * an error code for any failed I/O operations. | |
1858 | */ | |
1859 | int regmap_async_complete(struct regmap *map) | |
1860 | { | |
1861 | unsigned long flags; | |
1862 | int ret; | |
1863 | ||
1864 | /* Nothing to do with no async support */ | |
f2e055e7 | 1865 | if (!map->bus || !map->bus->async_write) |
0d509f2b MB |
1866 | return 0; |
1867 | ||
fe7d4ccd MB |
1868 | trace_regmap_async_complete_start(map->dev); |
1869 | ||
0d509f2b MB |
1870 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
1871 | ||
1872 | spin_lock_irqsave(&map->async_lock, flags); | |
1873 | ret = map->async_ret; | |
1874 | map->async_ret = 0; | |
1875 | spin_unlock_irqrestore(&map->async_lock, flags); | |
1876 | ||
fe7d4ccd MB |
1877 | trace_regmap_async_complete_done(map->dev); |
1878 | ||
0d509f2b MB |
1879 | return ret; |
1880 | } | |
f88948ef | 1881 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
0d509f2b | 1882 | |
22f0d90a MB |
1883 | /** |
1884 | * regmap_register_patch: Register and apply register updates to be applied | |
1885 | * on device initialistion | |
1886 | * | |
1887 | * @map: Register map to apply updates to. | |
1888 | * @regs: Values to update. | |
1889 | * @num_regs: Number of entries in regs. | |
1890 | * | |
1891 | * Register a set of register updates to be applied to the device | |
1892 | * whenever the device registers are synchronised with the cache and | |
1893 | * apply them immediately. Typically this is used to apply | |
1894 | * corrections to be applied to the device defaults on startup, such | |
1895 | * as the updates some vendors provide to undocumented registers. | |
1896 | */ | |
1897 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1898 | int num_regs) | |
1899 | { | |
aab13ebc | 1900 | struct reg_default *p; |
22f0d90a MB |
1901 | int i, ret; |
1902 | bool bypass; | |
1903 | ||
0d4529c5 | 1904 | map->lock(map->lock_arg); |
22f0d90a MB |
1905 | |
1906 | bypass = map->cache_bypass; | |
1907 | ||
1908 | map->cache_bypass = true; | |
1909 | ||
1910 | /* Write out first; it's useful to apply even if we fail later. */ | |
1911 | for (i = 0; i < num_regs; i++) { | |
1912 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1913 | if (ret != 0) { | |
1914 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1915 | regs[i].reg, regs[i].def, ret); | |
1916 | goto out; | |
1917 | } | |
1918 | } | |
1919 | ||
aab13ebc MB |
1920 | p = krealloc(map->patch, |
1921 | sizeof(struct reg_default) * (map->patch_regs + num_regs), | |
1922 | GFP_KERNEL); | |
1923 | if (p) { | |
1924 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); | |
1925 | map->patch = p; | |
1926 | map->patch_regs += num_regs; | |
22f0d90a MB |
1927 | } else { |
1928 | ret = -ENOMEM; | |
1929 | } | |
1930 | ||
1931 | out: | |
1932 | map->cache_bypass = bypass; | |
1933 | ||
0d4529c5 | 1934 | map->unlock(map->lock_arg); |
22f0d90a MB |
1935 | |
1936 | return ret; | |
1937 | } | |
1938 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1939 | ||
eae4b51b | 1940 | /* |
a6539c32 MB |
1941 | * regmap_get_val_bytes(): Report the size of a register value |
1942 | * | |
1943 | * Report the size of a register value, mainly intended to for use by | |
1944 | * generic infrastructure built on top of regmap. | |
1945 | */ | |
1946 | int regmap_get_val_bytes(struct regmap *map) | |
1947 | { | |
1948 | if (map->format.format_write) | |
1949 | return -EINVAL; | |
1950 | ||
1951 | return map->format.val_bytes; | |
1952 | } | |
1953 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1954 | ||
31244e39 MB |
1955 | static int __init regmap_initcall(void) |
1956 | { | |
1957 | regmap_debugfs_initcall(); | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | postcore_initcall(regmap_initcall); |