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Commit | Line | Data |
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b83a313b MB |
1 | /* |
2 | * Register map access API | |
3 | * | |
4 | * Copyright 2011 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
f5d6eba7 | 13 | #include <linux/device.h> |
b83a313b | 14 | #include <linux/slab.h> |
19694b5e | 15 | #include <linux/export.h> |
b83a313b MB |
16 | #include <linux/mutex.h> |
17 | #include <linux/err.h> | |
6863ca62 | 18 | #include <linux/rbtree.h> |
b83a313b | 19 | |
fb2736bb MB |
20 | #define CREATE_TRACE_POINTS |
21 | #include <trace/events/regmap.h> | |
22 | ||
93de9124 | 23 | #include "internal.h" |
b83a313b | 24 | |
1044c180 MB |
25 | /* |
26 | * Sometimes for failures during very early init the trace | |
27 | * infrastructure isn't available early enough to be used. For this | |
28 | * sort of problem defining LOG_DEVICE will add printks for basic | |
29 | * register I/O on a specific device. | |
30 | */ | |
31 | #undef LOG_DEVICE | |
32 | ||
33 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, | |
34 | unsigned int mask, unsigned int val, | |
35 | bool *change); | |
36 | ||
76aad392 DC |
37 | bool regmap_reg_in_ranges(unsigned int reg, |
38 | const struct regmap_range *ranges, | |
39 | unsigned int nranges) | |
40 | { | |
41 | const struct regmap_range *r; | |
42 | int i; | |
43 | ||
44 | for (i = 0, r = ranges; i < nranges; i++, r++) | |
45 | if (regmap_reg_in_range(reg, r)) | |
46 | return true; | |
47 | return false; | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); | |
50 | ||
51 | static bool _regmap_check_range_table(struct regmap *map, | |
52 | unsigned int reg, | |
53 | const struct regmap_access_table *table) | |
54 | { | |
55 | /* Check "no ranges" first */ | |
56 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) | |
57 | return false; | |
58 | ||
59 | /* In case zero "yes ranges" are supplied, any reg is OK */ | |
60 | if (!table->n_yes_ranges) | |
61 | return true; | |
62 | ||
63 | return regmap_reg_in_ranges(reg, table->yes_ranges, | |
64 | table->n_yes_ranges); | |
65 | } | |
66 | ||
8de2f081 MB |
67 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
68 | { | |
69 | if (map->max_register && reg > map->max_register) | |
70 | return false; | |
71 | ||
72 | if (map->writeable_reg) | |
73 | return map->writeable_reg(map->dev, reg); | |
74 | ||
76aad392 DC |
75 | if (map->wr_table) |
76 | return _regmap_check_range_table(map, reg, map->wr_table); | |
77 | ||
8de2f081 MB |
78 | return true; |
79 | } | |
80 | ||
81 | bool regmap_readable(struct regmap *map, unsigned int reg) | |
82 | { | |
83 | if (map->max_register && reg > map->max_register) | |
84 | return false; | |
85 | ||
4191f197 WS |
86 | if (map->format.format_write) |
87 | return false; | |
88 | ||
8de2f081 MB |
89 | if (map->readable_reg) |
90 | return map->readable_reg(map->dev, reg); | |
91 | ||
76aad392 DC |
92 | if (map->rd_table) |
93 | return _regmap_check_range_table(map, reg, map->rd_table); | |
94 | ||
8de2f081 MB |
95 | return true; |
96 | } | |
97 | ||
98 | bool regmap_volatile(struct regmap *map, unsigned int reg) | |
99 | { | |
4191f197 | 100 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
101 | return false; |
102 | ||
103 | if (map->volatile_reg) | |
104 | return map->volatile_reg(map->dev, reg); | |
105 | ||
76aad392 DC |
106 | if (map->volatile_table) |
107 | return _regmap_check_range_table(map, reg, map->volatile_table); | |
108 | ||
8de2f081 MB |
109 | return true; |
110 | } | |
111 | ||
112 | bool regmap_precious(struct regmap *map, unsigned int reg) | |
113 | { | |
4191f197 | 114 | if (!regmap_readable(map, reg)) |
8de2f081 MB |
115 | return false; |
116 | ||
117 | if (map->precious_reg) | |
118 | return map->precious_reg(map->dev, reg); | |
119 | ||
76aad392 DC |
120 | if (map->precious_table) |
121 | return _regmap_check_range_table(map, reg, map->precious_table); | |
122 | ||
8de2f081 MB |
123 | return false; |
124 | } | |
125 | ||
82cd9965 LPC |
126 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
127 | unsigned int num) | |
128 | { | |
129 | unsigned int i; | |
130 | ||
131 | for (i = 0; i < num; i++) | |
132 | if (!regmap_volatile(map, reg + i)) | |
133 | return false; | |
134 | ||
135 | return true; | |
136 | } | |
137 | ||
9aa50750 WS |
138 | static void regmap_format_2_6_write(struct regmap *map, |
139 | unsigned int reg, unsigned int val) | |
140 | { | |
141 | u8 *out = map->work_buf; | |
142 | ||
143 | *out = (reg << 6) | val; | |
144 | } | |
145 | ||
b83a313b MB |
146 | static void regmap_format_4_12_write(struct regmap *map, |
147 | unsigned int reg, unsigned int val) | |
148 | { | |
149 | __be16 *out = map->work_buf; | |
150 | *out = cpu_to_be16((reg << 12) | val); | |
151 | } | |
152 | ||
153 | static void regmap_format_7_9_write(struct regmap *map, | |
154 | unsigned int reg, unsigned int val) | |
155 | { | |
156 | __be16 *out = map->work_buf; | |
157 | *out = cpu_to_be16((reg << 9) | val); | |
158 | } | |
159 | ||
7e5ec63e LPC |
160 | static void regmap_format_10_14_write(struct regmap *map, |
161 | unsigned int reg, unsigned int val) | |
162 | { | |
163 | u8 *out = map->work_buf; | |
164 | ||
165 | out[2] = val; | |
166 | out[1] = (val >> 8) | (reg << 6); | |
167 | out[0] = reg >> 2; | |
168 | } | |
169 | ||
d939fb9a | 170 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
171 | { |
172 | u8 *b = buf; | |
173 | ||
d939fb9a | 174 | b[0] = val << shift; |
b83a313b MB |
175 | } |
176 | ||
141eba2e | 177 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
b83a313b MB |
178 | { |
179 | __be16 *b = buf; | |
180 | ||
d939fb9a | 181 | b[0] = cpu_to_be16(val << shift); |
b83a313b MB |
182 | } |
183 | ||
141eba2e SW |
184 | static void regmap_format_16_native(void *buf, unsigned int val, |
185 | unsigned int shift) | |
186 | { | |
187 | *(u16 *)buf = val << shift; | |
188 | } | |
189 | ||
d939fb9a | 190 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
ea279fc5 MR |
191 | { |
192 | u8 *b = buf; | |
193 | ||
d939fb9a MR |
194 | val <<= shift; |
195 | ||
ea279fc5 MR |
196 | b[0] = val >> 16; |
197 | b[1] = val >> 8; | |
198 | b[2] = val; | |
199 | } | |
200 | ||
141eba2e | 201 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
7d5e525b MB |
202 | { |
203 | __be32 *b = buf; | |
204 | ||
d939fb9a | 205 | b[0] = cpu_to_be32(val << shift); |
7d5e525b MB |
206 | } |
207 | ||
141eba2e SW |
208 | static void regmap_format_32_native(void *buf, unsigned int val, |
209 | unsigned int shift) | |
210 | { | |
211 | *(u32 *)buf = val << shift; | |
212 | } | |
213 | ||
b83a313b MB |
214 | static unsigned int regmap_parse_8(void *buf) |
215 | { | |
216 | u8 *b = buf; | |
217 | ||
218 | return b[0]; | |
219 | } | |
220 | ||
141eba2e | 221 | static unsigned int regmap_parse_16_be(void *buf) |
b83a313b MB |
222 | { |
223 | __be16 *b = buf; | |
224 | ||
225 | b[0] = be16_to_cpu(b[0]); | |
226 | ||
227 | return b[0]; | |
228 | } | |
229 | ||
141eba2e SW |
230 | static unsigned int regmap_parse_16_native(void *buf) |
231 | { | |
232 | return *(u16 *)buf; | |
233 | } | |
234 | ||
ea279fc5 MR |
235 | static unsigned int regmap_parse_24(void *buf) |
236 | { | |
237 | u8 *b = buf; | |
238 | unsigned int ret = b[2]; | |
239 | ret |= ((unsigned int)b[1]) << 8; | |
240 | ret |= ((unsigned int)b[0]) << 16; | |
241 | ||
242 | return ret; | |
243 | } | |
244 | ||
141eba2e | 245 | static unsigned int regmap_parse_32_be(void *buf) |
7d5e525b MB |
246 | { |
247 | __be32 *b = buf; | |
248 | ||
249 | b[0] = be32_to_cpu(b[0]); | |
250 | ||
251 | return b[0]; | |
252 | } | |
253 | ||
141eba2e SW |
254 | static unsigned int regmap_parse_32_native(void *buf) |
255 | { | |
256 | return *(u32 *)buf; | |
257 | } | |
258 | ||
0d4529c5 | 259 | static void regmap_lock_mutex(void *__map) |
bacdbe07 | 260 | { |
0d4529c5 | 261 | struct regmap *map = __map; |
bacdbe07 SW |
262 | mutex_lock(&map->mutex); |
263 | } | |
264 | ||
0d4529c5 | 265 | static void regmap_unlock_mutex(void *__map) |
bacdbe07 | 266 | { |
0d4529c5 | 267 | struct regmap *map = __map; |
bacdbe07 SW |
268 | mutex_unlock(&map->mutex); |
269 | } | |
270 | ||
0d4529c5 | 271 | static void regmap_lock_spinlock(void *__map) |
bacdbe07 | 272 | { |
0d4529c5 | 273 | struct regmap *map = __map; |
bacdbe07 SW |
274 | spin_lock(&map->spinlock); |
275 | } | |
276 | ||
0d4529c5 | 277 | static void regmap_unlock_spinlock(void *__map) |
bacdbe07 | 278 | { |
0d4529c5 | 279 | struct regmap *map = __map; |
bacdbe07 SW |
280 | spin_unlock(&map->spinlock); |
281 | } | |
282 | ||
72b39f6f MB |
283 | static void dev_get_regmap_release(struct device *dev, void *res) |
284 | { | |
285 | /* | |
286 | * We don't actually have anything to do here; the goal here | |
287 | * is not to manage the regmap but to provide a simple way to | |
288 | * get the regmap back given a struct device. | |
289 | */ | |
290 | } | |
291 | ||
6863ca62 KG |
292 | static bool _regmap_range_add(struct regmap *map, |
293 | struct regmap_range_node *data) | |
294 | { | |
295 | struct rb_root *root = &map->range_tree; | |
296 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
297 | ||
298 | while (*new) { | |
299 | struct regmap_range_node *this = | |
300 | container_of(*new, struct regmap_range_node, node); | |
301 | ||
302 | parent = *new; | |
303 | if (data->range_max < this->range_min) | |
304 | new = &((*new)->rb_left); | |
305 | else if (data->range_min > this->range_max) | |
306 | new = &((*new)->rb_right); | |
307 | else | |
308 | return false; | |
309 | } | |
310 | ||
311 | rb_link_node(&data->node, parent, new); | |
312 | rb_insert_color(&data->node, root); | |
313 | ||
314 | return true; | |
315 | } | |
316 | ||
317 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, | |
318 | unsigned int reg) | |
319 | { | |
320 | struct rb_node *node = map->range_tree.rb_node; | |
321 | ||
322 | while (node) { | |
323 | struct regmap_range_node *this = | |
324 | container_of(node, struct regmap_range_node, node); | |
325 | ||
326 | if (reg < this->range_min) | |
327 | node = node->rb_left; | |
328 | else if (reg > this->range_max) | |
329 | node = node->rb_right; | |
330 | else | |
331 | return this; | |
332 | } | |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
337 | static void regmap_range_exit(struct regmap *map) | |
338 | { | |
339 | struct rb_node *next; | |
340 | struct regmap_range_node *range_node; | |
341 | ||
342 | next = rb_first(&map->range_tree); | |
343 | while (next) { | |
344 | range_node = rb_entry(next, struct regmap_range_node, node); | |
345 | next = rb_next(&range_node->node); | |
346 | rb_erase(&range_node->node, &map->range_tree); | |
347 | kfree(range_node); | |
348 | } | |
349 | ||
350 | kfree(map->selector_work_buf); | |
351 | } | |
352 | ||
b83a313b MB |
353 | /** |
354 | * regmap_init(): Initialise register map | |
355 | * | |
356 | * @dev: Device that will be interacted with | |
357 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 358 | * @bus_context: Data passed to bus-specific callbacks |
b83a313b MB |
359 | * @config: Configuration for register map |
360 | * | |
361 | * The return value will be an ERR_PTR() on error or a valid pointer to | |
362 | * a struct regmap. This function should generally not be called | |
363 | * directly, it should be called by bus-specific init functions. | |
364 | */ | |
365 | struct regmap *regmap_init(struct device *dev, | |
366 | const struct regmap_bus *bus, | |
0135bbcc | 367 | void *bus_context, |
b83a313b MB |
368 | const struct regmap_config *config) |
369 | { | |
72b39f6f | 370 | struct regmap *map, **m; |
b83a313b | 371 | int ret = -EINVAL; |
141eba2e | 372 | enum regmap_endian reg_endian, val_endian; |
6863ca62 | 373 | int i, j; |
b83a313b MB |
374 | |
375 | if (!bus || !config) | |
abbb18fb | 376 | goto err; |
b83a313b MB |
377 | |
378 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
379 | if (map == NULL) { | |
380 | ret = -ENOMEM; | |
381 | goto err; | |
382 | } | |
383 | ||
0d4529c5 DC |
384 | if (config->lock && config->unlock) { |
385 | map->lock = config->lock; | |
386 | map->unlock = config->unlock; | |
387 | map->lock_arg = config->lock_arg; | |
bacdbe07 | 388 | } else { |
0d4529c5 DC |
389 | if (bus->fast_io) { |
390 | spin_lock_init(&map->spinlock); | |
391 | map->lock = regmap_lock_spinlock; | |
392 | map->unlock = regmap_unlock_spinlock; | |
393 | } else { | |
394 | mutex_init(&map->mutex); | |
395 | map->lock = regmap_lock_mutex; | |
396 | map->unlock = regmap_unlock_mutex; | |
397 | } | |
398 | map->lock_arg = map; | |
bacdbe07 | 399 | } |
c212accc | 400 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
82159ba8 | 401 | map->format.pad_bytes = config->pad_bits / 8; |
c212accc | 402 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
5494a98f FE |
403 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
404 | config->val_bits + config->pad_bits, 8); | |
d939fb9a | 405 | map->reg_shift = config->pad_bits % 8; |
f01ee60f SW |
406 | if (config->reg_stride) |
407 | map->reg_stride = config->reg_stride; | |
408 | else | |
409 | map->reg_stride = 1; | |
2e33caf1 | 410 | map->use_single_rw = config->use_single_rw; |
b83a313b MB |
411 | map->dev = dev; |
412 | map->bus = bus; | |
0135bbcc | 413 | map->bus_context = bus_context; |
2e2ae66d | 414 | map->max_register = config->max_register; |
76aad392 DC |
415 | map->wr_table = config->wr_table; |
416 | map->rd_table = config->rd_table; | |
417 | map->volatile_table = config->volatile_table; | |
418 | map->precious_table = config->precious_table; | |
2e2ae66d MB |
419 | map->writeable_reg = config->writeable_reg; |
420 | map->readable_reg = config->readable_reg; | |
421 | map->volatile_reg = config->volatile_reg; | |
2efe1642 | 422 | map->precious_reg = config->precious_reg; |
5d1729e7 | 423 | map->cache_type = config->cache_type; |
72b39f6f | 424 | map->name = config->name; |
b83a313b | 425 | |
6f306441 LPC |
426 | if (config->read_flag_mask || config->write_flag_mask) { |
427 | map->read_flag_mask = config->read_flag_mask; | |
428 | map->write_flag_mask = config->write_flag_mask; | |
429 | } else { | |
430 | map->read_flag_mask = bus->read_flag_mask; | |
431 | } | |
432 | ||
141eba2e SW |
433 | reg_endian = config->reg_format_endian; |
434 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
435 | reg_endian = bus->reg_format_endian_default; | |
436 | if (reg_endian == REGMAP_ENDIAN_DEFAULT) | |
437 | reg_endian = REGMAP_ENDIAN_BIG; | |
438 | ||
439 | val_endian = config->val_format_endian; | |
440 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
441 | val_endian = bus->val_format_endian_default; | |
442 | if (val_endian == REGMAP_ENDIAN_DEFAULT) | |
443 | val_endian = REGMAP_ENDIAN_BIG; | |
444 | ||
d939fb9a | 445 | switch (config->reg_bits + map->reg_shift) { |
9aa50750 WS |
446 | case 2: |
447 | switch (config->val_bits) { | |
448 | case 6: | |
449 | map->format.format_write = regmap_format_2_6_write; | |
450 | break; | |
451 | default: | |
452 | goto err_map; | |
453 | } | |
454 | break; | |
455 | ||
b83a313b MB |
456 | case 4: |
457 | switch (config->val_bits) { | |
458 | case 12: | |
459 | map->format.format_write = regmap_format_4_12_write; | |
460 | break; | |
461 | default: | |
462 | goto err_map; | |
463 | } | |
464 | break; | |
465 | ||
466 | case 7: | |
467 | switch (config->val_bits) { | |
468 | case 9: | |
469 | map->format.format_write = regmap_format_7_9_write; | |
470 | break; | |
471 | default: | |
472 | goto err_map; | |
473 | } | |
474 | break; | |
475 | ||
7e5ec63e LPC |
476 | case 10: |
477 | switch (config->val_bits) { | |
478 | case 14: | |
479 | map->format.format_write = regmap_format_10_14_write; | |
480 | break; | |
481 | default: | |
482 | goto err_map; | |
483 | } | |
484 | break; | |
485 | ||
b83a313b MB |
486 | case 8: |
487 | map->format.format_reg = regmap_format_8; | |
488 | break; | |
489 | ||
490 | case 16: | |
141eba2e SW |
491 | switch (reg_endian) { |
492 | case REGMAP_ENDIAN_BIG: | |
493 | map->format.format_reg = regmap_format_16_be; | |
494 | break; | |
495 | case REGMAP_ENDIAN_NATIVE: | |
496 | map->format.format_reg = regmap_format_16_native; | |
497 | break; | |
498 | default: | |
499 | goto err_map; | |
500 | } | |
b83a313b MB |
501 | break; |
502 | ||
7d5e525b | 503 | case 32: |
141eba2e SW |
504 | switch (reg_endian) { |
505 | case REGMAP_ENDIAN_BIG: | |
506 | map->format.format_reg = regmap_format_32_be; | |
507 | break; | |
508 | case REGMAP_ENDIAN_NATIVE: | |
509 | map->format.format_reg = regmap_format_32_native; | |
510 | break; | |
511 | default: | |
512 | goto err_map; | |
513 | } | |
7d5e525b MB |
514 | break; |
515 | ||
b83a313b MB |
516 | default: |
517 | goto err_map; | |
518 | } | |
519 | ||
520 | switch (config->val_bits) { | |
521 | case 8: | |
522 | map->format.format_val = regmap_format_8; | |
523 | map->format.parse_val = regmap_parse_8; | |
524 | break; | |
525 | case 16: | |
141eba2e SW |
526 | switch (val_endian) { |
527 | case REGMAP_ENDIAN_BIG: | |
528 | map->format.format_val = regmap_format_16_be; | |
529 | map->format.parse_val = regmap_parse_16_be; | |
530 | break; | |
531 | case REGMAP_ENDIAN_NATIVE: | |
532 | map->format.format_val = regmap_format_16_native; | |
533 | map->format.parse_val = regmap_parse_16_native; | |
534 | break; | |
535 | default: | |
536 | goto err_map; | |
537 | } | |
b83a313b | 538 | break; |
ea279fc5 | 539 | case 24: |
141eba2e SW |
540 | if (val_endian != REGMAP_ENDIAN_BIG) |
541 | goto err_map; | |
ea279fc5 MR |
542 | map->format.format_val = regmap_format_24; |
543 | map->format.parse_val = regmap_parse_24; | |
544 | break; | |
7d5e525b | 545 | case 32: |
141eba2e SW |
546 | switch (val_endian) { |
547 | case REGMAP_ENDIAN_BIG: | |
548 | map->format.format_val = regmap_format_32_be; | |
549 | map->format.parse_val = regmap_parse_32_be; | |
550 | break; | |
551 | case REGMAP_ENDIAN_NATIVE: | |
552 | map->format.format_val = regmap_format_32_native; | |
553 | map->format.parse_val = regmap_parse_32_native; | |
554 | break; | |
555 | default: | |
556 | goto err_map; | |
557 | } | |
7d5e525b | 558 | break; |
b83a313b MB |
559 | } |
560 | ||
141eba2e SW |
561 | if (map->format.format_write) { |
562 | if ((reg_endian != REGMAP_ENDIAN_BIG) || | |
563 | (val_endian != REGMAP_ENDIAN_BIG)) | |
564 | goto err_map; | |
7a647614 | 565 | map->use_single_rw = true; |
141eba2e | 566 | } |
7a647614 | 567 | |
b83a313b MB |
568 | if (!map->format.format_write && |
569 | !(map->format.format_reg && map->format.format_val)) | |
570 | goto err_map; | |
571 | ||
82159ba8 | 572 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
b83a313b MB |
573 | if (map->work_buf == NULL) { |
574 | ret = -ENOMEM; | |
5204f5e3 | 575 | goto err_map; |
b83a313b MB |
576 | } |
577 | ||
6863ca62 | 578 | map->range_tree = RB_ROOT; |
e3549cd0 | 579 | for (i = 0; i < config->num_ranges; i++) { |
6863ca62 KG |
580 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
581 | struct regmap_range_node *new; | |
582 | ||
583 | /* Sanity check */ | |
061adc06 MB |
584 | if (range_cfg->range_max < range_cfg->range_min) { |
585 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, | |
586 | range_cfg->range_max, range_cfg->range_min); | |
6863ca62 | 587 | goto err_range; |
061adc06 MB |
588 | } |
589 | ||
590 | if (range_cfg->range_max > map->max_register) { | |
591 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, | |
592 | range_cfg->range_max, map->max_register); | |
593 | goto err_range; | |
594 | } | |
595 | ||
596 | if (range_cfg->selector_reg > map->max_register) { | |
597 | dev_err(map->dev, | |
598 | "Invalid range %d: selector out of map\n", i); | |
599 | goto err_range; | |
600 | } | |
601 | ||
602 | if (range_cfg->window_len == 0) { | |
603 | dev_err(map->dev, "Invalid range %d: window_len 0\n", | |
604 | i); | |
605 | goto err_range; | |
606 | } | |
6863ca62 KG |
607 | |
608 | /* Make sure, that this register range has no selector | |
609 | or data window within its boundary */ | |
e3549cd0 | 610 | for (j = 0; j < config->num_ranges; j++) { |
6863ca62 KG |
611 | unsigned sel_reg = config->ranges[j].selector_reg; |
612 | unsigned win_min = config->ranges[j].window_start; | |
613 | unsigned win_max = win_min + | |
614 | config->ranges[j].window_len - 1; | |
615 | ||
616 | if (range_cfg->range_min <= sel_reg && | |
617 | sel_reg <= range_cfg->range_max) { | |
061adc06 MB |
618 | dev_err(map->dev, |
619 | "Range %d: selector for %d in window\n", | |
620 | i, j); | |
6863ca62 KG |
621 | goto err_range; |
622 | } | |
623 | ||
624 | if (!(win_max < range_cfg->range_min || | |
625 | win_min > range_cfg->range_max)) { | |
061adc06 MB |
626 | dev_err(map->dev, |
627 | "Range %d: window for %d in window\n", | |
628 | i, j); | |
6863ca62 KG |
629 | goto err_range; |
630 | } | |
631 | } | |
632 | ||
633 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
634 | if (new == NULL) { | |
635 | ret = -ENOMEM; | |
636 | goto err_range; | |
637 | } | |
638 | ||
4b020b3f | 639 | new->map = map; |
d058bb49 | 640 | new->name = range_cfg->name; |
6863ca62 KG |
641 | new->range_min = range_cfg->range_min; |
642 | new->range_max = range_cfg->range_max; | |
643 | new->selector_reg = range_cfg->selector_reg; | |
644 | new->selector_mask = range_cfg->selector_mask; | |
645 | new->selector_shift = range_cfg->selector_shift; | |
646 | new->window_start = range_cfg->window_start; | |
647 | new->window_len = range_cfg->window_len; | |
648 | ||
649 | if (_regmap_range_add(map, new) == false) { | |
061adc06 | 650 | dev_err(map->dev, "Failed to add range %d\n", i); |
6863ca62 KG |
651 | kfree(new); |
652 | goto err_range; | |
653 | } | |
654 | ||
655 | if (map->selector_work_buf == NULL) { | |
656 | map->selector_work_buf = | |
657 | kzalloc(map->format.buf_size, GFP_KERNEL); | |
658 | if (map->selector_work_buf == NULL) { | |
659 | ret = -ENOMEM; | |
660 | goto err_range; | |
661 | } | |
662 | } | |
663 | } | |
052d2cd1 | 664 | |
e5e3b8ab | 665 | ret = regcache_init(map, config); |
0ff3e62f | 666 | if (ret != 0) |
6863ca62 KG |
667 | goto err_range; |
668 | ||
669 | regmap_debugfs_init(map, config->name); | |
5d1729e7 | 670 | |
72b39f6f MB |
671 | /* Add a devres resource for dev_get_regmap() */ |
672 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); | |
673 | if (!m) { | |
674 | ret = -ENOMEM; | |
6863ca62 | 675 | goto err_debugfs; |
72b39f6f MB |
676 | } |
677 | *m = map; | |
678 | devres_add(dev, m); | |
679 | ||
b83a313b MB |
680 | return map; |
681 | ||
bfaa25f3 SW |
682 | err_debugfs: |
683 | regmap_debugfs_exit(map); | |
72b39f6f | 684 | regcache_exit(map); |
6863ca62 KG |
685 | err_range: |
686 | regmap_range_exit(map); | |
58072cbf | 687 | kfree(map->work_buf); |
b83a313b MB |
688 | err_map: |
689 | kfree(map); | |
690 | err: | |
691 | return ERR_PTR(ret); | |
692 | } | |
693 | EXPORT_SYMBOL_GPL(regmap_init); | |
694 | ||
c0eb4676 MB |
695 | static void devm_regmap_release(struct device *dev, void *res) |
696 | { | |
697 | regmap_exit(*(struct regmap **)res); | |
698 | } | |
699 | ||
700 | /** | |
701 | * devm_regmap_init(): Initialise managed register map | |
702 | * | |
703 | * @dev: Device that will be interacted with | |
704 | * @bus: Bus-specific callbacks to use with device | |
0135bbcc | 705 | * @bus_context: Data passed to bus-specific callbacks |
c0eb4676 MB |
706 | * @config: Configuration for register map |
707 | * | |
708 | * The return value will be an ERR_PTR() on error or a valid pointer | |
709 | * to a struct regmap. This function should generally not be called | |
710 | * directly, it should be called by bus-specific init functions. The | |
711 | * map will be automatically freed by the device management code. | |
712 | */ | |
713 | struct regmap *devm_regmap_init(struct device *dev, | |
714 | const struct regmap_bus *bus, | |
0135bbcc | 715 | void *bus_context, |
c0eb4676 MB |
716 | const struct regmap_config *config) |
717 | { | |
718 | struct regmap **ptr, *regmap; | |
719 | ||
720 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); | |
721 | if (!ptr) | |
722 | return ERR_PTR(-ENOMEM); | |
723 | ||
0135bbcc | 724 | regmap = regmap_init(dev, bus, bus_context, config); |
c0eb4676 MB |
725 | if (!IS_ERR(regmap)) { |
726 | *ptr = regmap; | |
727 | devres_add(dev, ptr); | |
728 | } else { | |
729 | devres_free(ptr); | |
730 | } | |
731 | ||
732 | return regmap; | |
733 | } | |
734 | EXPORT_SYMBOL_GPL(devm_regmap_init); | |
735 | ||
bf315173 MB |
736 | /** |
737 | * regmap_reinit_cache(): Reinitialise the current register cache | |
738 | * | |
739 | * @map: Register map to operate on. | |
740 | * @config: New configuration. Only the cache data will be used. | |
741 | * | |
742 | * Discard any existing register cache for the map and initialize a | |
743 | * new cache. This can be used to restore the cache to defaults or to | |
744 | * update the cache configuration to reflect runtime discovery of the | |
745 | * hardware. | |
4d879514 DP |
746 | * |
747 | * No explicit locking is done here, the user needs to ensure that | |
748 | * this function will not race with other calls to regmap. | |
bf315173 MB |
749 | */ |
750 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) | |
751 | { | |
bf315173 | 752 | regcache_exit(map); |
a24f64a6 | 753 | regmap_debugfs_exit(map); |
bf315173 MB |
754 | |
755 | map->max_register = config->max_register; | |
756 | map->writeable_reg = config->writeable_reg; | |
757 | map->readable_reg = config->readable_reg; | |
758 | map->volatile_reg = config->volatile_reg; | |
759 | map->precious_reg = config->precious_reg; | |
760 | map->cache_type = config->cache_type; | |
761 | ||
d3c242e1 | 762 | regmap_debugfs_init(map, config->name); |
a24f64a6 | 763 | |
421e8d2d MB |
764 | map->cache_bypass = false; |
765 | map->cache_only = false; | |
766 | ||
4d879514 | 767 | return regcache_init(map, config); |
bf315173 | 768 | } |
752a6a5f | 769 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
bf315173 | 770 | |
b83a313b MB |
771 | /** |
772 | * regmap_exit(): Free a previously allocated register map | |
773 | */ | |
774 | void regmap_exit(struct regmap *map) | |
775 | { | |
5d1729e7 | 776 | regcache_exit(map); |
31244e39 | 777 | regmap_debugfs_exit(map); |
6863ca62 | 778 | regmap_range_exit(map); |
0135bbcc SW |
779 | if (map->bus->free_context) |
780 | map->bus->free_context(map->bus_context); | |
b83a313b | 781 | kfree(map->work_buf); |
b83a313b MB |
782 | kfree(map); |
783 | } | |
784 | EXPORT_SYMBOL_GPL(regmap_exit); | |
785 | ||
72b39f6f MB |
786 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
787 | { | |
788 | struct regmap **r = res; | |
789 | if (!r || !*r) { | |
790 | WARN_ON(!r || !*r); | |
791 | return 0; | |
792 | } | |
793 | ||
794 | /* If the user didn't specify a name match any */ | |
795 | if (data) | |
796 | return (*r)->name == data; | |
797 | else | |
798 | return 1; | |
799 | } | |
800 | ||
801 | /** | |
802 | * dev_get_regmap(): Obtain the regmap (if any) for a device | |
803 | * | |
804 | * @dev: Device to retrieve the map for | |
805 | * @name: Optional name for the register map, usually NULL. | |
806 | * | |
807 | * Returns the regmap for the device if one is present, or NULL. If | |
808 | * name is specified then it must match the name specified when | |
809 | * registering the device, if it is NULL then the first regmap found | |
810 | * will be used. Devices with multiple register maps are very rare, | |
811 | * generic code should normally not need to specify a name. | |
812 | */ | |
813 | struct regmap *dev_get_regmap(struct device *dev, const char *name) | |
814 | { | |
815 | struct regmap **r = devres_find(dev, dev_get_regmap_release, | |
816 | dev_get_regmap_match, (void *)name); | |
817 | ||
818 | if (!r) | |
819 | return NULL; | |
820 | return *r; | |
821 | } | |
822 | EXPORT_SYMBOL_GPL(dev_get_regmap); | |
823 | ||
6863ca62 | 824 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
98bc7dfd | 825 | struct regmap_range_node *range, |
6863ca62 KG |
826 | unsigned int val_num) |
827 | { | |
6863ca62 KG |
828 | void *orig_work_buf; |
829 | unsigned int win_offset; | |
830 | unsigned int win_page; | |
831 | bool page_chg; | |
832 | int ret; | |
833 | ||
98bc7dfd MB |
834 | win_offset = (*reg - range->range_min) % range->window_len; |
835 | win_page = (*reg - range->range_min) / range->window_len; | |
6863ca62 | 836 | |
98bc7dfd MB |
837 | if (val_num > 1) { |
838 | /* Bulk write shouldn't cross range boundary */ | |
839 | if (*reg + val_num - 1 > range->range_max) | |
840 | return -EINVAL; | |
6863ca62 | 841 | |
98bc7dfd MB |
842 | /* ... or single page boundary */ |
843 | if (val_num > range->window_len - win_offset) | |
844 | return -EINVAL; | |
845 | } | |
6863ca62 | 846 | |
98bc7dfd MB |
847 | /* It is possible to have selector register inside data window. |
848 | In that case, selector register is located on every page and | |
849 | it needs no page switching, when accessed alone. */ | |
850 | if (val_num > 1 || | |
851 | range->window_start + win_offset != range->selector_reg) { | |
852 | /* Use separate work_buf during page switching */ | |
853 | orig_work_buf = map->work_buf; | |
854 | map->work_buf = map->selector_work_buf; | |
6863ca62 | 855 | |
98bc7dfd MB |
856 | ret = _regmap_update_bits(map, range->selector_reg, |
857 | range->selector_mask, | |
858 | win_page << range->selector_shift, | |
859 | &page_chg); | |
632a5b01 | 860 | |
98bc7dfd | 861 | map->work_buf = orig_work_buf; |
6863ca62 | 862 | |
0ff3e62f | 863 | if (ret != 0) |
98bc7dfd | 864 | return ret; |
6863ca62 KG |
865 | } |
866 | ||
98bc7dfd MB |
867 | *reg = range->window_start + win_offset; |
868 | ||
6863ca62 KG |
869 | return 0; |
870 | } | |
871 | ||
b83a313b MB |
872 | static int _regmap_raw_write(struct regmap *map, unsigned int reg, |
873 | const void *val, size_t val_len) | |
874 | { | |
98bc7dfd | 875 | struct regmap_range_node *range; |
6f306441 | 876 | u8 *u8 = map->work_buf; |
b83a313b MB |
877 | void *buf; |
878 | int ret = -ENOTSUPP; | |
879 | size_t len; | |
73304781 MB |
880 | int i; |
881 | ||
882 | /* Check for unwritable registers before we start */ | |
883 | if (map->writeable_reg) | |
884 | for (i = 0; i < val_len / map->format.val_bytes; i++) | |
f01ee60f SW |
885 | if (!map->writeable_reg(map->dev, |
886 | reg + (i * map->reg_stride))) | |
73304781 | 887 | return -EINVAL; |
b83a313b | 888 | |
c9157198 LD |
889 | if (!map->cache_bypass && map->format.parse_val) { |
890 | unsigned int ival; | |
891 | int val_bytes = map->format.val_bytes; | |
892 | for (i = 0; i < val_len / val_bytes; i++) { | |
893 | memcpy(map->work_buf, val + (i * val_bytes), val_bytes); | |
894 | ival = map->format.parse_val(map->work_buf); | |
f01ee60f SW |
895 | ret = regcache_write(map, reg + (i * map->reg_stride), |
896 | ival); | |
c9157198 LD |
897 | if (ret) { |
898 | dev_err(map->dev, | |
6d04b8ac | 899 | "Error in caching of register: %x ret: %d\n", |
c9157198 LD |
900 | reg + i, ret); |
901 | return ret; | |
902 | } | |
903 | } | |
904 | if (map->cache_only) { | |
905 | map->cache_dirty = true; | |
906 | return 0; | |
907 | } | |
908 | } | |
909 | ||
98bc7dfd MB |
910 | range = _regmap_range_lookup(map, reg); |
911 | if (range) { | |
8a2ceac6 MB |
912 | int val_num = val_len / map->format.val_bytes; |
913 | int win_offset = (reg - range->range_min) % range->window_len; | |
914 | int win_residue = range->window_len - win_offset; | |
915 | ||
916 | /* If the write goes beyond the end of the window split it */ | |
917 | while (val_num > win_residue) { | |
1a61cfe3 | 918 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
8a2ceac6 MB |
919 | win_residue, val_len / map->format.val_bytes); |
920 | ret = _regmap_raw_write(map, reg, val, win_residue * | |
921 | map->format.val_bytes); | |
922 | if (ret != 0) | |
923 | return ret; | |
924 | ||
925 | reg += win_residue; | |
926 | val_num -= win_residue; | |
927 | val += win_residue * map->format.val_bytes; | |
928 | val_len -= win_residue * map->format.val_bytes; | |
929 | ||
930 | win_offset = (reg - range->range_min) % | |
931 | range->window_len; | |
932 | win_residue = range->window_len - win_offset; | |
933 | } | |
934 | ||
935 | ret = _regmap_select_page(map, ®, range, val_num); | |
0ff3e62f | 936 | if (ret != 0) |
98bc7dfd MB |
937 | return ret; |
938 | } | |
6863ca62 | 939 | |
d939fb9a | 940 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b | 941 | |
6f306441 LPC |
942 | u8[0] |= map->write_flag_mask; |
943 | ||
fb2736bb MB |
944 | trace_regmap_hw_write_start(map->dev, reg, |
945 | val_len / map->format.val_bytes); | |
946 | ||
2547e201 MB |
947 | /* If we're doing a single register write we can probably just |
948 | * send the work_buf directly, otherwise try to do a gather | |
949 | * write. | |
950 | */ | |
82159ba8 MB |
951 | if (val == (map->work_buf + map->format.pad_bytes + |
952 | map->format.reg_bytes)) | |
0135bbcc | 953 | ret = map->bus->write(map->bus_context, map->work_buf, |
82159ba8 MB |
954 | map->format.reg_bytes + |
955 | map->format.pad_bytes + | |
956 | val_len); | |
2547e201 | 957 | else if (map->bus->gather_write) |
0135bbcc | 958 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
82159ba8 MB |
959 | map->format.reg_bytes + |
960 | map->format.pad_bytes, | |
b83a313b MB |
961 | val, val_len); |
962 | ||
2547e201 | 963 | /* If that didn't work fall back on linearising by hand. */ |
b83a313b | 964 | if (ret == -ENOTSUPP) { |
82159ba8 MB |
965 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
966 | buf = kzalloc(len, GFP_KERNEL); | |
b83a313b MB |
967 | if (!buf) |
968 | return -ENOMEM; | |
969 | ||
970 | memcpy(buf, map->work_buf, map->format.reg_bytes); | |
82159ba8 MB |
971 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
972 | val, val_len); | |
0135bbcc | 973 | ret = map->bus->write(map->bus_context, buf, len); |
b83a313b MB |
974 | |
975 | kfree(buf); | |
976 | } | |
977 | ||
fb2736bb MB |
978 | trace_regmap_hw_write_done(map->dev, reg, |
979 | val_len / map->format.val_bytes); | |
980 | ||
b83a313b MB |
981 | return ret; |
982 | } | |
983 | ||
4d2dc095 DP |
984 | int _regmap_write(struct regmap *map, unsigned int reg, |
985 | unsigned int val) | |
b83a313b | 986 | { |
98bc7dfd | 987 | struct regmap_range_node *range; |
fb2736bb | 988 | int ret; |
b83a313b MB |
989 | BUG_ON(!map->format.format_write && !map->format.format_val); |
990 | ||
c9157198 | 991 | if (!map->cache_bypass && map->format.format_write) { |
5d1729e7 DP |
992 | ret = regcache_write(map, reg, val); |
993 | if (ret != 0) | |
994 | return ret; | |
8ae0d7e8 MB |
995 | if (map->cache_only) { |
996 | map->cache_dirty = true; | |
5d1729e7 | 997 | return 0; |
8ae0d7e8 | 998 | } |
5d1729e7 DP |
999 | } |
1000 | ||
1044c180 MB |
1001 | #ifdef LOG_DEVICE |
1002 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1003 | dev_info(map->dev, "%x <= %x\n", reg, val); | |
1004 | #endif | |
1005 | ||
fb2736bb MB |
1006 | trace_regmap_reg_write(map->dev, reg, val); |
1007 | ||
b83a313b | 1008 | if (map->format.format_write) { |
98bc7dfd MB |
1009 | range = _regmap_range_lookup(map, reg); |
1010 | if (range) { | |
1011 | ret = _regmap_select_page(map, ®, range, 1); | |
0ff3e62f | 1012 | if (ret != 0) |
98bc7dfd MB |
1013 | return ret; |
1014 | } | |
6863ca62 | 1015 | |
b83a313b MB |
1016 | map->format.format_write(map, reg, val); |
1017 | ||
fb2736bb MB |
1018 | trace_regmap_hw_write_start(map->dev, reg, 1); |
1019 | ||
0135bbcc | 1020 | ret = map->bus->write(map->bus_context, map->work_buf, |
fb2736bb MB |
1021 | map->format.buf_size); |
1022 | ||
1023 | trace_regmap_hw_write_done(map->dev, reg, 1); | |
1024 | ||
1025 | return ret; | |
b83a313b | 1026 | } else { |
82159ba8 | 1027 | map->format.format_val(map->work_buf + map->format.reg_bytes |
d939fb9a | 1028 | + map->format.pad_bytes, val, 0); |
b83a313b | 1029 | return _regmap_raw_write(map, reg, |
82159ba8 MB |
1030 | map->work_buf + |
1031 | map->format.reg_bytes + | |
1032 | map->format.pad_bytes, | |
b83a313b MB |
1033 | map->format.val_bytes); |
1034 | } | |
1035 | } | |
1036 | ||
1037 | /** | |
1038 | * regmap_write(): Write a value to a single register | |
1039 | * | |
1040 | * @map: Register map to write to | |
1041 | * @reg: Register to write to | |
1042 | * @val: Value to be written | |
1043 | * | |
1044 | * A value of zero will be returned on success, a negative errno will | |
1045 | * be returned in error cases. | |
1046 | */ | |
1047 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) | |
1048 | { | |
1049 | int ret; | |
1050 | ||
f01ee60f SW |
1051 | if (reg % map->reg_stride) |
1052 | return -EINVAL; | |
1053 | ||
0d4529c5 | 1054 | map->lock(map->lock_arg); |
b83a313b MB |
1055 | |
1056 | ret = _regmap_write(map, reg, val); | |
1057 | ||
0d4529c5 | 1058 | map->unlock(map->lock_arg); |
b83a313b MB |
1059 | |
1060 | return ret; | |
1061 | } | |
1062 | EXPORT_SYMBOL_GPL(regmap_write); | |
1063 | ||
1064 | /** | |
1065 | * regmap_raw_write(): Write raw values to one or more registers | |
1066 | * | |
1067 | * @map: Register map to write to | |
1068 | * @reg: Initial register to write to | |
1069 | * @val: Block of data to be written, laid out for direct transmission to the | |
1070 | * device | |
1071 | * @val_len: Length of data pointed to by val. | |
1072 | * | |
1073 | * This function is intended to be used for things like firmware | |
1074 | * download where a large block of data needs to be transferred to the | |
1075 | * device. No formatting will be done on the data provided. | |
1076 | * | |
1077 | * A value of zero will be returned on success, a negative errno will | |
1078 | * be returned in error cases. | |
1079 | */ | |
1080 | int regmap_raw_write(struct regmap *map, unsigned int reg, | |
1081 | const void *val, size_t val_len) | |
1082 | { | |
1083 | int ret; | |
1084 | ||
851960ba SW |
1085 | if (val_len % map->format.val_bytes) |
1086 | return -EINVAL; | |
f01ee60f SW |
1087 | if (reg % map->reg_stride) |
1088 | return -EINVAL; | |
851960ba | 1089 | |
0d4529c5 | 1090 | map->lock(map->lock_arg); |
b83a313b MB |
1091 | |
1092 | ret = _regmap_raw_write(map, reg, val, val_len); | |
1093 | ||
0d4529c5 | 1094 | map->unlock(map->lock_arg); |
b83a313b MB |
1095 | |
1096 | return ret; | |
1097 | } | |
1098 | EXPORT_SYMBOL_GPL(regmap_raw_write); | |
1099 | ||
8eaeb219 LD |
1100 | /* |
1101 | * regmap_bulk_write(): Write multiple registers to the device | |
1102 | * | |
1103 | * @map: Register map to write to | |
1104 | * @reg: First register to be write from | |
1105 | * @val: Block of data to be written, in native register size for device | |
1106 | * @val_count: Number of registers to write | |
1107 | * | |
1108 | * This function is intended to be used for writing a large block of | |
1109 | * data to be device either in single transfer or multiple transfer. | |
1110 | * | |
1111 | * A value of zero will be returned on success, a negative errno will | |
1112 | * be returned in error cases. | |
1113 | */ | |
1114 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, | |
1115 | size_t val_count) | |
1116 | { | |
1117 | int ret = 0, i; | |
1118 | size_t val_bytes = map->format.val_bytes; | |
1119 | void *wval; | |
1120 | ||
1121 | if (!map->format.parse_val) | |
1122 | return -EINVAL; | |
f01ee60f SW |
1123 | if (reg % map->reg_stride) |
1124 | return -EINVAL; | |
8eaeb219 | 1125 | |
0d4529c5 | 1126 | map->lock(map->lock_arg); |
8eaeb219 LD |
1127 | |
1128 | /* No formatting is require if val_byte is 1 */ | |
1129 | if (val_bytes == 1) { | |
1130 | wval = (void *)val; | |
1131 | } else { | |
1132 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); | |
1133 | if (!wval) { | |
1134 | ret = -ENOMEM; | |
1135 | dev_err(map->dev, "Error in memory allocation\n"); | |
1136 | goto out; | |
1137 | } | |
1138 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1139 | map->format.parse_val(wval + i); | |
1140 | } | |
2e33caf1 AJ |
1141 | /* |
1142 | * Some devices does not support bulk write, for | |
1143 | * them we have a series of single write operations. | |
1144 | */ | |
1145 | if (map->use_single_rw) { | |
1146 | for (i = 0; i < val_count; i++) { | |
1147 | ret = regmap_raw_write(map, | |
1148 | reg + (i * map->reg_stride), | |
1149 | val + (i * val_bytes), | |
1150 | val_bytes); | |
1151 | if (ret != 0) | |
1152 | return ret; | |
1153 | } | |
1154 | } else { | |
1155 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); | |
1156 | } | |
8eaeb219 LD |
1157 | |
1158 | if (val_bytes != 1) | |
1159 | kfree(wval); | |
1160 | ||
1161 | out: | |
0d4529c5 | 1162 | map->unlock(map->lock_arg); |
8eaeb219 LD |
1163 | return ret; |
1164 | } | |
1165 | EXPORT_SYMBOL_GPL(regmap_bulk_write); | |
1166 | ||
b83a313b MB |
1167 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
1168 | unsigned int val_len) | |
1169 | { | |
98bc7dfd | 1170 | struct regmap_range_node *range; |
b83a313b MB |
1171 | u8 *u8 = map->work_buf; |
1172 | int ret; | |
1173 | ||
98bc7dfd MB |
1174 | range = _regmap_range_lookup(map, reg); |
1175 | if (range) { | |
1176 | ret = _regmap_select_page(map, ®, range, | |
1177 | val_len / map->format.val_bytes); | |
0ff3e62f | 1178 | if (ret != 0) |
98bc7dfd MB |
1179 | return ret; |
1180 | } | |
6863ca62 | 1181 | |
d939fb9a | 1182 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
b83a313b MB |
1183 | |
1184 | /* | |
6f306441 | 1185 | * Some buses or devices flag reads by setting the high bits in the |
b83a313b MB |
1186 | * register addresss; since it's always the high bits for all |
1187 | * current formats we can do this here rather than in | |
1188 | * formatting. This may break if we get interesting formats. | |
1189 | */ | |
6f306441 | 1190 | u8[0] |= map->read_flag_mask; |
b83a313b | 1191 | |
fb2736bb MB |
1192 | trace_regmap_hw_read_start(map->dev, reg, |
1193 | val_len / map->format.val_bytes); | |
1194 | ||
0135bbcc | 1195 | ret = map->bus->read(map->bus_context, map->work_buf, |
82159ba8 | 1196 | map->format.reg_bytes + map->format.pad_bytes, |
40c5cc26 | 1197 | val, val_len); |
b83a313b | 1198 | |
fb2736bb MB |
1199 | trace_regmap_hw_read_done(map->dev, reg, |
1200 | val_len / map->format.val_bytes); | |
1201 | ||
1202 | return ret; | |
b83a313b MB |
1203 | } |
1204 | ||
1205 | static int _regmap_read(struct regmap *map, unsigned int reg, | |
1206 | unsigned int *val) | |
1207 | { | |
1208 | int ret; | |
1209 | ||
5d1729e7 DP |
1210 | if (!map->cache_bypass) { |
1211 | ret = regcache_read(map, reg, val); | |
1212 | if (ret == 0) | |
1213 | return 0; | |
1214 | } | |
1215 | ||
19254411 LPC |
1216 | if (!map->format.parse_val) |
1217 | return -EINVAL; | |
1218 | ||
5d1729e7 DP |
1219 | if (map->cache_only) |
1220 | return -EBUSY; | |
1221 | ||
b83a313b | 1222 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); |
fb2736bb | 1223 | if (ret == 0) { |
b83a313b | 1224 | *val = map->format.parse_val(map->work_buf); |
1044c180 MB |
1225 | |
1226 | #ifdef LOG_DEVICE | |
1227 | if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) | |
1228 | dev_info(map->dev, "%x => %x\n", reg, *val); | |
1229 | #endif | |
1230 | ||
fb2736bb MB |
1231 | trace_regmap_reg_read(map->dev, reg, *val); |
1232 | } | |
b83a313b | 1233 | |
f2985367 MB |
1234 | if (ret == 0 && !map->cache_bypass) |
1235 | regcache_write(map, reg, *val); | |
1236 | ||
b83a313b MB |
1237 | return ret; |
1238 | } | |
1239 | ||
1240 | /** | |
1241 | * regmap_read(): Read a value from a single register | |
1242 | * | |
1243 | * @map: Register map to write to | |
1244 | * @reg: Register to be read from | |
1245 | * @val: Pointer to store read value | |
1246 | * | |
1247 | * A value of zero will be returned on success, a negative errno will | |
1248 | * be returned in error cases. | |
1249 | */ | |
1250 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) | |
1251 | { | |
1252 | int ret; | |
1253 | ||
f01ee60f SW |
1254 | if (reg % map->reg_stride) |
1255 | return -EINVAL; | |
1256 | ||
0d4529c5 | 1257 | map->lock(map->lock_arg); |
b83a313b MB |
1258 | |
1259 | ret = _regmap_read(map, reg, val); | |
1260 | ||
0d4529c5 | 1261 | map->unlock(map->lock_arg); |
b83a313b MB |
1262 | |
1263 | return ret; | |
1264 | } | |
1265 | EXPORT_SYMBOL_GPL(regmap_read); | |
1266 | ||
1267 | /** | |
1268 | * regmap_raw_read(): Read raw data from the device | |
1269 | * | |
1270 | * @map: Register map to write to | |
1271 | * @reg: First register to be read from | |
1272 | * @val: Pointer to store read value | |
1273 | * @val_len: Size of data to read | |
1274 | * | |
1275 | * A value of zero will be returned on success, a negative errno will | |
1276 | * be returned in error cases. | |
1277 | */ | |
1278 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, | |
1279 | size_t val_len) | |
1280 | { | |
b8fb5ab1 MB |
1281 | size_t val_bytes = map->format.val_bytes; |
1282 | size_t val_count = val_len / val_bytes; | |
1283 | unsigned int v; | |
1284 | int ret, i; | |
04e016ad | 1285 | |
851960ba SW |
1286 | if (val_len % map->format.val_bytes) |
1287 | return -EINVAL; | |
f01ee60f SW |
1288 | if (reg % map->reg_stride) |
1289 | return -EINVAL; | |
851960ba | 1290 | |
0d4529c5 | 1291 | map->lock(map->lock_arg); |
b83a313b | 1292 | |
b8fb5ab1 MB |
1293 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
1294 | map->cache_type == REGCACHE_NONE) { | |
1295 | /* Physical block read if there's no cache involved */ | |
1296 | ret = _regmap_raw_read(map, reg, val, val_len); | |
1297 | ||
1298 | } else { | |
1299 | /* Otherwise go word by word for the cache; should be low | |
1300 | * cost as we expect to hit the cache. | |
1301 | */ | |
1302 | for (i = 0; i < val_count; i++) { | |
f01ee60f SW |
1303 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
1304 | &v); | |
b8fb5ab1 MB |
1305 | if (ret != 0) |
1306 | goto out; | |
1307 | ||
d939fb9a | 1308 | map->format.format_val(val + (i * val_bytes), v, 0); |
b8fb5ab1 MB |
1309 | } |
1310 | } | |
b83a313b | 1311 | |
b8fb5ab1 | 1312 | out: |
0d4529c5 | 1313 | map->unlock(map->lock_arg); |
b83a313b MB |
1314 | |
1315 | return ret; | |
1316 | } | |
1317 | EXPORT_SYMBOL_GPL(regmap_raw_read); | |
1318 | ||
1319 | /** | |
1320 | * regmap_bulk_read(): Read multiple registers from the device | |
1321 | * | |
1322 | * @map: Register map to write to | |
1323 | * @reg: First register to be read from | |
1324 | * @val: Pointer to store read value, in native register size for device | |
1325 | * @val_count: Number of registers to read | |
1326 | * | |
1327 | * A value of zero will be returned on success, a negative errno will | |
1328 | * be returned in error cases. | |
1329 | */ | |
1330 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, | |
1331 | size_t val_count) | |
1332 | { | |
1333 | int ret, i; | |
1334 | size_t val_bytes = map->format.val_bytes; | |
82cd9965 | 1335 | bool vol = regmap_volatile_range(map, reg, val_count); |
5d1729e7 | 1336 | |
b83a313b MB |
1337 | if (!map->format.parse_val) |
1338 | return -EINVAL; | |
f01ee60f SW |
1339 | if (reg % map->reg_stride) |
1340 | return -EINVAL; | |
b83a313b | 1341 | |
de2d808f | 1342 | if (vol || map->cache_type == REGCACHE_NONE) { |
2e33caf1 AJ |
1343 | /* |
1344 | * Some devices does not support bulk read, for | |
1345 | * them we have a series of single read operations. | |
1346 | */ | |
1347 | if (map->use_single_rw) { | |
1348 | for (i = 0; i < val_count; i++) { | |
1349 | ret = regmap_raw_read(map, | |
1350 | reg + (i * map->reg_stride), | |
1351 | val + (i * val_bytes), | |
1352 | val_bytes); | |
1353 | if (ret != 0) | |
1354 | return ret; | |
1355 | } | |
1356 | } else { | |
1357 | ret = regmap_raw_read(map, reg, val, | |
1358 | val_bytes * val_count); | |
1359 | if (ret != 0) | |
1360 | return ret; | |
1361 | } | |
de2d808f MB |
1362 | |
1363 | for (i = 0; i < val_count * val_bytes; i += val_bytes) | |
1364 | map->format.parse_val(val + i); | |
1365 | } else { | |
1366 | for (i = 0; i < val_count; i++) { | |
6560ffd1 | 1367 | unsigned int ival; |
f01ee60f | 1368 | ret = regmap_read(map, reg + (i * map->reg_stride), |
25061d28 | 1369 | &ival); |
de2d808f MB |
1370 | if (ret != 0) |
1371 | return ret; | |
6560ffd1 | 1372 | memcpy(val + (i * val_bytes), &ival, val_bytes); |
de2d808f MB |
1373 | } |
1374 | } | |
b83a313b MB |
1375 | |
1376 | return 0; | |
1377 | } | |
1378 | EXPORT_SYMBOL_GPL(regmap_bulk_read); | |
1379 | ||
018690d3 MB |
1380 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
1381 | unsigned int mask, unsigned int val, | |
1382 | bool *change) | |
b83a313b MB |
1383 | { |
1384 | int ret; | |
d91e8db2 | 1385 | unsigned int tmp, orig; |
b83a313b | 1386 | |
d91e8db2 | 1387 | ret = _regmap_read(map, reg, &orig); |
b83a313b | 1388 | if (ret != 0) |
fc3ebd78 | 1389 | return ret; |
b83a313b | 1390 | |
d91e8db2 | 1391 | tmp = orig & ~mask; |
b83a313b MB |
1392 | tmp |= val & mask; |
1393 | ||
018690d3 | 1394 | if (tmp != orig) { |
d91e8db2 | 1395 | ret = _regmap_write(map, reg, tmp); |
018690d3 MB |
1396 | *change = true; |
1397 | } else { | |
1398 | *change = false; | |
1399 | } | |
b83a313b | 1400 | |
b83a313b MB |
1401 | return ret; |
1402 | } | |
018690d3 MB |
1403 | |
1404 | /** | |
1405 | * regmap_update_bits: Perform a read/modify/write cycle on the register map | |
1406 | * | |
1407 | * @map: Register map to update | |
1408 | * @reg: Register to update | |
1409 | * @mask: Bitmask to change | |
1410 | * @val: New value for bitmask | |
1411 | * | |
1412 | * Returns zero for success, a negative number on error. | |
1413 | */ | |
1414 | int regmap_update_bits(struct regmap *map, unsigned int reg, | |
1415 | unsigned int mask, unsigned int val) | |
1416 | { | |
1417 | bool change; | |
fc3ebd78 KG |
1418 | int ret; |
1419 | ||
0d4529c5 | 1420 | map->lock(map->lock_arg); |
fc3ebd78 | 1421 | ret = _regmap_update_bits(map, reg, mask, val, &change); |
0d4529c5 | 1422 | map->unlock(map->lock_arg); |
fc3ebd78 KG |
1423 | |
1424 | return ret; | |
018690d3 | 1425 | } |
b83a313b | 1426 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
31244e39 | 1427 | |
018690d3 MB |
1428 | /** |
1429 | * regmap_update_bits_check: Perform a read/modify/write cycle on the | |
1430 | * register map and report if updated | |
1431 | * | |
1432 | * @map: Register map to update | |
1433 | * @reg: Register to update | |
1434 | * @mask: Bitmask to change | |
1435 | * @val: New value for bitmask | |
1436 | * @change: Boolean indicating if a write was done | |
1437 | * | |
1438 | * Returns zero for success, a negative number on error. | |
1439 | */ | |
1440 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, | |
1441 | unsigned int mask, unsigned int val, | |
1442 | bool *change) | |
1443 | { | |
fc3ebd78 KG |
1444 | int ret; |
1445 | ||
0d4529c5 | 1446 | map->lock(map->lock_arg); |
fc3ebd78 | 1447 | ret = _regmap_update_bits(map, reg, mask, val, change); |
0d4529c5 | 1448 | map->unlock(map->lock_arg); |
fc3ebd78 | 1449 | return ret; |
018690d3 MB |
1450 | } |
1451 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); | |
1452 | ||
22f0d90a MB |
1453 | /** |
1454 | * regmap_register_patch: Register and apply register updates to be applied | |
1455 | * on device initialistion | |
1456 | * | |
1457 | * @map: Register map to apply updates to. | |
1458 | * @regs: Values to update. | |
1459 | * @num_regs: Number of entries in regs. | |
1460 | * | |
1461 | * Register a set of register updates to be applied to the device | |
1462 | * whenever the device registers are synchronised with the cache and | |
1463 | * apply them immediately. Typically this is used to apply | |
1464 | * corrections to be applied to the device defaults on startup, such | |
1465 | * as the updates some vendors provide to undocumented registers. | |
1466 | */ | |
1467 | int regmap_register_patch(struct regmap *map, const struct reg_default *regs, | |
1468 | int num_regs) | |
1469 | { | |
1470 | int i, ret; | |
1471 | bool bypass; | |
1472 | ||
1473 | /* If needed the implementation can be extended to support this */ | |
1474 | if (map->patch) | |
1475 | return -EBUSY; | |
1476 | ||
0d4529c5 | 1477 | map->lock(map->lock_arg); |
22f0d90a MB |
1478 | |
1479 | bypass = map->cache_bypass; | |
1480 | ||
1481 | map->cache_bypass = true; | |
1482 | ||
1483 | /* Write out first; it's useful to apply even if we fail later. */ | |
1484 | for (i = 0; i < num_regs; i++) { | |
1485 | ret = _regmap_write(map, regs[i].reg, regs[i].def); | |
1486 | if (ret != 0) { | |
1487 | dev_err(map->dev, "Failed to write %x = %x: %d\n", | |
1488 | regs[i].reg, regs[i].def, ret); | |
1489 | goto out; | |
1490 | } | |
1491 | } | |
1492 | ||
2a14d7d9 | 1493 | map->patch = kcalloc(num_regs, sizeof(struct reg_default), GFP_KERNEL); |
22f0d90a MB |
1494 | if (map->patch != NULL) { |
1495 | memcpy(map->patch, regs, | |
1496 | num_regs * sizeof(struct reg_default)); | |
1497 | map->patch_regs = num_regs; | |
1498 | } else { | |
1499 | ret = -ENOMEM; | |
1500 | } | |
1501 | ||
1502 | out: | |
1503 | map->cache_bypass = bypass; | |
1504 | ||
0d4529c5 | 1505 | map->unlock(map->lock_arg); |
22f0d90a MB |
1506 | |
1507 | return ret; | |
1508 | } | |
1509 | EXPORT_SYMBOL_GPL(regmap_register_patch); | |
1510 | ||
eae4b51b | 1511 | /* |
a6539c32 MB |
1512 | * regmap_get_val_bytes(): Report the size of a register value |
1513 | * | |
1514 | * Report the size of a register value, mainly intended to for use by | |
1515 | * generic infrastructure built on top of regmap. | |
1516 | */ | |
1517 | int regmap_get_val_bytes(struct regmap *map) | |
1518 | { | |
1519 | if (map->format.format_write) | |
1520 | return -EINVAL; | |
1521 | ||
1522 | return map->format.val_bytes; | |
1523 | } | |
1524 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); | |
1525 | ||
31244e39 MB |
1526 | static int __init regmap_initcall(void) |
1527 | { | |
1528 | regmap_debugfs_initcall(); | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | postcore_initcall(regmap_initcall); |