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