Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 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 | |
Stephen Warren | f5d6eba | 2012-03-09 13:17:28 -0700 | [diff] [blame] | 13 | #include <linux/device.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 14 | #include <linux/slab.h> |
Paul Gortmaker | 19694b5 | 2012-02-28 19:28:02 -0500 | [diff] [blame] | 15 | #include <linux/export.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 16 | #include <linux/mutex.h> |
| 17 | #include <linux/err.h> |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 18 | #include <linux/of.h> |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 19 | #include <linux/rbtree.h> |
Stephen Warren | 30b2a55 | 2013-02-02 22:50:14 -0700 | [diff] [blame] | 20 | #include <linux/sched.h> |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 21 | #include <linux/delay.h> |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 22 | #include <linux/log2.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 23 | |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 24 | #define CREATE_TRACE_POINTS |
Steven Rostedt | f58078d | 2015-03-19 17:50:47 -0400 | [diff] [blame] | 25 | #include "trace.h" |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 26 | |
Mark Brown | 93de912 | 2011-07-20 22:35:37 +0100 | [diff] [blame] | 27 | #include "internal.h" |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 28 | |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 29 | /* |
| 30 | * Sometimes for failures during very early init the trace |
| 31 | * infrastructure isn't available early enough to be used. For this |
| 32 | * sort of problem defining LOG_DEVICE will add printks for basic |
| 33 | * register I/O on a specific device. |
| 34 | */ |
| 35 | #undef LOG_DEVICE |
| 36 | |
| 37 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
| 38 | unsigned int mask, unsigned int val, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 39 | bool *change, bool force_write); |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 40 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 41 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
| 42 | unsigned int *val); |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 43 | static int _regmap_bus_read(void *context, unsigned int reg, |
| 44 | unsigned int *val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 45 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
| 46 | unsigned int val); |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 47 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
| 48 | unsigned int val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 49 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
| 50 | unsigned int val); |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 51 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 52 | bool regmap_reg_in_ranges(unsigned int reg, |
| 53 | const struct regmap_range *ranges, |
| 54 | unsigned int nranges) |
| 55 | { |
| 56 | const struct regmap_range *r; |
| 57 | int i; |
| 58 | |
| 59 | for (i = 0, r = ranges; i < nranges; i++, r++) |
| 60 | if (regmap_reg_in_range(reg, r)) |
| 61 | return true; |
| 62 | return false; |
| 63 | } |
| 64 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); |
| 65 | |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 66 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
| 67 | const struct regmap_access_table *table) |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 68 | { |
| 69 | /* Check "no ranges" first */ |
| 70 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) |
| 71 | return false; |
| 72 | |
| 73 | /* In case zero "yes ranges" are supplied, any reg is OK */ |
| 74 | if (!table->n_yes_ranges) |
| 75 | return true; |
| 76 | |
| 77 | return regmap_reg_in_ranges(reg, table->yes_ranges, |
| 78 | table->n_yes_ranges); |
| 79 | } |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 80 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 81 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 82 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
| 83 | { |
| 84 | if (map->max_register && reg > map->max_register) |
| 85 | return false; |
| 86 | |
| 87 | if (map->writeable_reg) |
| 88 | return map->writeable_reg(map->dev, reg); |
| 89 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 90 | if (map->wr_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 91 | return regmap_check_range_table(map, reg, map->wr_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 92 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 93 | return true; |
| 94 | } |
| 95 | |
Cristian Birsan | 1ea975c | 2016-08-08 18:44:21 +0300 | [diff] [blame] | 96 | bool regmap_cached(struct regmap *map, unsigned int reg) |
| 97 | { |
| 98 | int ret; |
| 99 | unsigned int val; |
| 100 | |
Charles Keepax | 7a2e11e | 2018-02-12 18:15:44 +0000 | [diff] [blame] | 101 | if (map->cache_type == REGCACHE_NONE) |
Cristian Birsan | 1ea975c | 2016-08-08 18:44:21 +0300 | [diff] [blame] | 102 | return false; |
| 103 | |
| 104 | if (!map->cache_ops) |
| 105 | return false; |
| 106 | |
| 107 | if (map->max_register && reg > map->max_register) |
| 108 | return false; |
| 109 | |
| 110 | map->lock(map->lock_arg); |
| 111 | ret = regcache_read(map, reg, &val); |
| 112 | map->unlock(map->lock_arg); |
| 113 | if (ret) |
| 114 | return false; |
| 115 | |
| 116 | return true; |
| 117 | } |
| 118 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 119 | bool regmap_readable(struct regmap *map, unsigned int reg) |
| 120 | { |
Lars-Peter Clausen | 04dc91c | 2015-07-13 12:26:44 +0200 | [diff] [blame] | 121 | if (!map->reg_read) |
| 122 | return false; |
| 123 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 124 | if (map->max_register && reg > map->max_register) |
| 125 | return false; |
| 126 | |
Wolfram Sang | 4191f19 | 2012-01-30 15:08:16 +0100 | [diff] [blame] | 127 | if (map->format.format_write) |
| 128 | return false; |
| 129 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 130 | if (map->readable_reg) |
| 131 | return map->readable_reg(map->dev, reg); |
| 132 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 133 | if (map->rd_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 134 | return regmap_check_range_table(map, reg, map->rd_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 135 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 136 | return true; |
| 137 | } |
| 138 | |
| 139 | bool regmap_volatile(struct regmap *map, unsigned int reg) |
| 140 | { |
Mark Brown | 5844a8b | 2014-08-26 12:12:17 +0100 | [diff] [blame] | 141 | if (!map->format.format_write && !regmap_readable(map, reg)) |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 142 | return false; |
| 143 | |
| 144 | if (map->volatile_reg) |
| 145 | return map->volatile_reg(map->dev, reg); |
| 146 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 147 | if (map->volatile_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 148 | return regmap_check_range_table(map, reg, map->volatile_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 149 | |
Mark Brown | b92be6f | 2013-06-03 17:24:08 +0100 | [diff] [blame] | 150 | if (map->cache_ops) |
| 151 | return false; |
| 152 | else |
| 153 | return true; |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | bool regmap_precious(struct regmap *map, unsigned int reg) |
| 157 | { |
Wolfram Sang | 4191f19 | 2012-01-30 15:08:16 +0100 | [diff] [blame] | 158 | if (!regmap_readable(map, reg)) |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 159 | return false; |
| 160 | |
| 161 | if (map->precious_reg) |
| 162 | return map->precious_reg(map->dev, reg); |
| 163 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 164 | if (map->precious_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 165 | return regmap_check_range_table(map, reg, map->precious_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 166 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 167 | return false; |
| 168 | } |
| 169 | |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 170 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
Paul Bolle | a8f28cf | 2012-10-08 22:06:30 +0200 | [diff] [blame] | 171 | size_t num) |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 172 | { |
| 173 | unsigned int i; |
| 174 | |
| 175 | for (i = 0; i < num; i++) |
| 176 | if (!regmap_volatile(map, reg + i)) |
| 177 | return false; |
| 178 | |
| 179 | return true; |
| 180 | } |
| 181 | |
Wolfram Sang | 9aa5075 | 2012-01-27 16:10:22 +0100 | [diff] [blame] | 182 | static void regmap_format_2_6_write(struct regmap *map, |
| 183 | unsigned int reg, unsigned int val) |
| 184 | { |
| 185 | u8 *out = map->work_buf; |
| 186 | |
| 187 | *out = (reg << 6) | val; |
| 188 | } |
| 189 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 190 | static void regmap_format_4_12_write(struct regmap *map, |
| 191 | unsigned int reg, unsigned int val) |
| 192 | { |
| 193 | __be16 *out = map->work_buf; |
| 194 | *out = cpu_to_be16((reg << 12) | val); |
| 195 | } |
| 196 | |
| 197 | static void regmap_format_7_9_write(struct regmap *map, |
| 198 | unsigned int reg, unsigned int val) |
| 199 | { |
| 200 | __be16 *out = map->work_buf; |
| 201 | *out = cpu_to_be16((reg << 9) | val); |
| 202 | } |
| 203 | |
Lars-Peter Clausen | 7e5ec63 | 2011-11-16 16:28:21 +0100 | [diff] [blame] | 204 | static void regmap_format_10_14_write(struct regmap *map, |
| 205 | unsigned int reg, unsigned int val) |
| 206 | { |
| 207 | u8 *out = map->work_buf; |
| 208 | |
| 209 | out[2] = val; |
| 210 | out[1] = (val >> 8) | (reg << 6); |
| 211 | out[0] = reg >> 2; |
| 212 | } |
| 213 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 214 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 215 | { |
| 216 | u8 *b = buf; |
| 217 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 218 | b[0] = val << shift; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 219 | } |
| 220 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 221 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 222 | { |
| 223 | __be16 *b = buf; |
| 224 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 225 | b[0] = cpu_to_be16(val << shift); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 228 | static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift) |
| 229 | { |
| 230 | __le16 *b = buf; |
| 231 | |
| 232 | b[0] = cpu_to_le16(val << shift); |
| 233 | } |
| 234 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 235 | static void regmap_format_16_native(void *buf, unsigned int val, |
| 236 | unsigned int shift) |
| 237 | { |
| 238 | *(u16 *)buf = val << shift; |
| 239 | } |
| 240 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 241 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 242 | { |
| 243 | u8 *b = buf; |
| 244 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 245 | val <<= shift; |
| 246 | |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 247 | b[0] = val >> 16; |
| 248 | b[1] = val >> 8; |
| 249 | b[2] = val; |
| 250 | } |
| 251 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 252 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 253 | { |
| 254 | __be32 *b = buf; |
| 255 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 256 | b[0] = cpu_to_be32(val << shift); |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 257 | } |
| 258 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 259 | static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift) |
| 260 | { |
| 261 | __le32 *b = buf; |
| 262 | |
| 263 | b[0] = cpu_to_le32(val << shift); |
| 264 | } |
| 265 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 266 | static void regmap_format_32_native(void *buf, unsigned int val, |
| 267 | unsigned int shift) |
| 268 | { |
| 269 | *(u32 *)buf = val << shift; |
| 270 | } |
| 271 | |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 272 | #ifdef CONFIG_64BIT |
| 273 | static void regmap_format_64_be(void *buf, unsigned int val, unsigned int shift) |
| 274 | { |
| 275 | __be64 *b = buf; |
| 276 | |
Dan Carpenter | 01c377b | 2015-12-12 15:59:14 +0300 | [diff] [blame] | 277 | b[0] = cpu_to_be64((u64)val << shift); |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | static void regmap_format_64_le(void *buf, unsigned int val, unsigned int shift) |
| 281 | { |
| 282 | __le64 *b = buf; |
| 283 | |
Dan Carpenter | 01c377b | 2015-12-12 15:59:14 +0300 | [diff] [blame] | 284 | b[0] = cpu_to_le64((u64)val << shift); |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | static void regmap_format_64_native(void *buf, unsigned int val, |
| 288 | unsigned int shift) |
| 289 | { |
Dan Carpenter | 01c377b | 2015-12-12 15:59:14 +0300 | [diff] [blame] | 290 | *(u64 *)buf = (u64)val << shift; |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 291 | } |
| 292 | #endif |
| 293 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 294 | static void regmap_parse_inplace_noop(void *buf) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 295 | { |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | static unsigned int regmap_parse_8(const void *buf) |
| 299 | { |
| 300 | const u8 *b = buf; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 301 | |
| 302 | return b[0]; |
| 303 | } |
| 304 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 305 | static unsigned int regmap_parse_16_be(const void *buf) |
| 306 | { |
| 307 | const __be16 *b = buf; |
| 308 | |
| 309 | return be16_to_cpu(b[0]); |
| 310 | } |
| 311 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 312 | static unsigned int regmap_parse_16_le(const void *buf) |
| 313 | { |
| 314 | const __le16 *b = buf; |
| 315 | |
| 316 | return le16_to_cpu(b[0]); |
| 317 | } |
| 318 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 319 | static void regmap_parse_16_be_inplace(void *buf) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 320 | { |
| 321 | __be16 *b = buf; |
| 322 | |
| 323 | b[0] = be16_to_cpu(b[0]); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 324 | } |
| 325 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 326 | static void regmap_parse_16_le_inplace(void *buf) |
| 327 | { |
| 328 | __le16 *b = buf; |
| 329 | |
| 330 | b[0] = le16_to_cpu(b[0]); |
| 331 | } |
| 332 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 333 | static unsigned int regmap_parse_16_native(const void *buf) |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 334 | { |
| 335 | return *(u16 *)buf; |
| 336 | } |
| 337 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 338 | static unsigned int regmap_parse_24(const void *buf) |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 339 | { |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 340 | const u8 *b = buf; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 341 | unsigned int ret = b[2]; |
| 342 | ret |= ((unsigned int)b[1]) << 8; |
| 343 | ret |= ((unsigned int)b[0]) << 16; |
| 344 | |
| 345 | return ret; |
| 346 | } |
| 347 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 348 | static unsigned int regmap_parse_32_be(const void *buf) |
| 349 | { |
| 350 | const __be32 *b = buf; |
| 351 | |
| 352 | return be32_to_cpu(b[0]); |
| 353 | } |
| 354 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 355 | static unsigned int regmap_parse_32_le(const void *buf) |
| 356 | { |
| 357 | const __le32 *b = buf; |
| 358 | |
| 359 | return le32_to_cpu(b[0]); |
| 360 | } |
| 361 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 362 | static void regmap_parse_32_be_inplace(void *buf) |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 363 | { |
| 364 | __be32 *b = buf; |
| 365 | |
| 366 | b[0] = be32_to_cpu(b[0]); |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 367 | } |
| 368 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 369 | static void regmap_parse_32_le_inplace(void *buf) |
| 370 | { |
| 371 | __le32 *b = buf; |
| 372 | |
| 373 | b[0] = le32_to_cpu(b[0]); |
| 374 | } |
| 375 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 376 | static unsigned int regmap_parse_32_native(const void *buf) |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 377 | { |
| 378 | return *(u32 *)buf; |
| 379 | } |
| 380 | |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 381 | #ifdef CONFIG_64BIT |
| 382 | static unsigned int regmap_parse_64_be(const void *buf) |
| 383 | { |
| 384 | const __be64 *b = buf; |
| 385 | |
| 386 | return be64_to_cpu(b[0]); |
| 387 | } |
| 388 | |
| 389 | static unsigned int regmap_parse_64_le(const void *buf) |
| 390 | { |
| 391 | const __le64 *b = buf; |
| 392 | |
| 393 | return le64_to_cpu(b[0]); |
| 394 | } |
| 395 | |
| 396 | static void regmap_parse_64_be_inplace(void *buf) |
| 397 | { |
| 398 | __be64 *b = buf; |
| 399 | |
| 400 | b[0] = be64_to_cpu(b[0]); |
| 401 | } |
| 402 | |
| 403 | static void regmap_parse_64_le_inplace(void *buf) |
| 404 | { |
| 405 | __le64 *b = buf; |
| 406 | |
| 407 | b[0] = le64_to_cpu(b[0]); |
| 408 | } |
| 409 | |
| 410 | static unsigned int regmap_parse_64_native(const void *buf) |
| 411 | { |
| 412 | return *(u64 *)buf; |
| 413 | } |
| 414 | #endif |
| 415 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 416 | static void regmap_lock_mutex(void *__map) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 417 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 418 | struct regmap *map = __map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 419 | mutex_lock(&map->mutex); |
| 420 | } |
| 421 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 422 | static void regmap_unlock_mutex(void *__map) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 423 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 424 | struct regmap *map = __map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 425 | mutex_unlock(&map->mutex); |
| 426 | } |
| 427 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 428 | static void regmap_lock_spinlock(void *__map) |
Fabio Estevam | b4519c7 | 2013-07-16 02:10:11 -0300 | [diff] [blame] | 429 | __acquires(&map->spinlock) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 430 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 431 | struct regmap *map = __map; |
Lars-Peter Clausen | 92ab1aa | 2013-05-24 10:29:22 +0200 | [diff] [blame] | 432 | unsigned long flags; |
| 433 | |
| 434 | spin_lock_irqsave(&map->spinlock, flags); |
| 435 | map->spinlock_flags = flags; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 436 | } |
| 437 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 438 | static void regmap_unlock_spinlock(void *__map) |
Fabio Estevam | b4519c7 | 2013-07-16 02:10:11 -0300 | [diff] [blame] | 439 | __releases(&map->spinlock) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 440 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 441 | struct regmap *map = __map; |
Lars-Peter Clausen | 92ab1aa | 2013-05-24 10:29:22 +0200 | [diff] [blame] | 442 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 443 | } |
| 444 | |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 445 | static void dev_get_regmap_release(struct device *dev, void *res) |
| 446 | { |
| 447 | /* |
| 448 | * We don't actually have anything to do here; the goal here |
| 449 | * is not to manage the regmap but to provide a simple way to |
| 450 | * get the regmap back given a struct device. |
| 451 | */ |
| 452 | } |
| 453 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 454 | static bool _regmap_range_add(struct regmap *map, |
| 455 | struct regmap_range_node *data) |
| 456 | { |
| 457 | struct rb_root *root = &map->range_tree; |
| 458 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 459 | |
| 460 | while (*new) { |
| 461 | struct regmap_range_node *this = |
| 462 | container_of(*new, struct regmap_range_node, node); |
| 463 | |
| 464 | parent = *new; |
| 465 | if (data->range_max < this->range_min) |
| 466 | new = &((*new)->rb_left); |
| 467 | else if (data->range_min > this->range_max) |
| 468 | new = &((*new)->rb_right); |
| 469 | else |
| 470 | return false; |
| 471 | } |
| 472 | |
| 473 | rb_link_node(&data->node, parent, new); |
| 474 | rb_insert_color(&data->node, root); |
| 475 | |
| 476 | return true; |
| 477 | } |
| 478 | |
| 479 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, |
| 480 | unsigned int reg) |
| 481 | { |
| 482 | struct rb_node *node = map->range_tree.rb_node; |
| 483 | |
| 484 | while (node) { |
| 485 | struct regmap_range_node *this = |
| 486 | container_of(node, struct regmap_range_node, node); |
| 487 | |
| 488 | if (reg < this->range_min) |
| 489 | node = node->rb_left; |
| 490 | else if (reg > this->range_max) |
| 491 | node = node->rb_right; |
| 492 | else |
| 493 | return this; |
| 494 | } |
| 495 | |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | static void regmap_range_exit(struct regmap *map) |
| 500 | { |
| 501 | struct rb_node *next; |
| 502 | struct regmap_range_node *range_node; |
| 503 | |
| 504 | next = rb_first(&map->range_tree); |
| 505 | while (next) { |
| 506 | range_node = rb_entry(next, struct regmap_range_node, node); |
| 507 | next = rb_next(&range_node->node); |
| 508 | rb_erase(&range_node->node, &map->range_tree); |
| 509 | kfree(range_node); |
| 510 | } |
| 511 | |
| 512 | kfree(map->selector_work_buf); |
| 513 | } |
| 514 | |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 515 | int regmap_attach_dev(struct device *dev, struct regmap *map, |
| 516 | const struct regmap_config *config) |
| 517 | { |
| 518 | struct regmap **m; |
| 519 | |
| 520 | map->dev = dev; |
| 521 | |
| 522 | regmap_debugfs_init(map, config->name); |
| 523 | |
| 524 | /* Add a devres resource for dev_get_regmap() */ |
| 525 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); |
| 526 | if (!m) { |
| 527 | regmap_debugfs_exit(map); |
| 528 | return -ENOMEM; |
| 529 | } |
| 530 | *m = map; |
| 531 | devres_add(dev, m); |
| 532 | |
| 533 | return 0; |
| 534 | } |
| 535 | EXPORT_SYMBOL_GPL(regmap_attach_dev); |
| 536 | |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 537 | static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus, |
| 538 | const struct regmap_config *config) |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 539 | { |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 540 | enum regmap_endian endian; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 541 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 542 | /* Retrieve the endianness specification from the regmap config */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 543 | endian = config->reg_format_endian; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 544 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 545 | /* If the regmap config specified a non-default value, use that */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 546 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 547 | return endian; |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 548 | |
| 549 | /* Retrieve the endianness specification from the bus config */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 550 | if (bus && bus->reg_format_endian_default) |
| 551 | endian = bus->reg_format_endian_default; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 552 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 553 | /* If the bus specified a non-default value, use that */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 554 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 555 | return endian; |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 556 | |
| 557 | /* Use this if no other value was found */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 558 | return REGMAP_ENDIAN_BIG; |
| 559 | } |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 560 | |
Guenter Roeck | 3c174d2 | 2015-02-03 10:01:18 -0800 | [diff] [blame] | 561 | enum regmap_endian regmap_get_val_endian(struct device *dev, |
| 562 | const struct regmap_bus *bus, |
| 563 | const struct regmap_config *config) |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 564 | { |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 565 | struct device_node *np; |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 566 | enum regmap_endian endian; |
| 567 | |
| 568 | /* Retrieve the endianness specification from the regmap config */ |
| 569 | endian = config->val_format_endian; |
| 570 | |
| 571 | /* If the regmap config specified a non-default value, use that */ |
| 572 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 573 | return endian; |
| 574 | |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 575 | /* If the dev and dev->of_node exist try to get endianness from DT */ |
| 576 | if (dev && dev->of_node) { |
| 577 | np = dev->of_node; |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 578 | |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 579 | /* Parse the device's DT node for an endianness specification */ |
| 580 | if (of_property_read_bool(np, "big-endian")) |
| 581 | endian = REGMAP_ENDIAN_BIG; |
| 582 | else if (of_property_read_bool(np, "little-endian")) |
| 583 | endian = REGMAP_ENDIAN_LITTLE; |
Mark Brown | a06c488 | 2016-01-26 17:59:30 +0000 | [diff] [blame] | 584 | else if (of_property_read_bool(np, "native-endian")) |
| 585 | endian = REGMAP_ENDIAN_NATIVE; |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 586 | |
| 587 | /* If the endianness was specified in DT, use that */ |
| 588 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 589 | return endian; |
| 590 | } |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 591 | |
| 592 | /* Retrieve the endianness specification from the bus config */ |
| 593 | if (bus && bus->val_format_endian_default) |
| 594 | endian = bus->val_format_endian_default; |
| 595 | |
| 596 | /* If the bus specified a non-default value, use that */ |
| 597 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 598 | return endian; |
| 599 | |
| 600 | /* Use this if no other value was found */ |
| 601 | return REGMAP_ENDIAN_BIG; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 602 | } |
Guenter Roeck | 3c174d2 | 2015-02-03 10:01:18 -0800 | [diff] [blame] | 603 | EXPORT_SYMBOL_GPL(regmap_get_val_endian); |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 604 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 605 | struct regmap *__regmap_init(struct device *dev, |
| 606 | const struct regmap_bus *bus, |
| 607 | void *bus_context, |
| 608 | const struct regmap_config *config, |
| 609 | struct lock_class_key *lock_key, |
| 610 | const char *lock_name) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 611 | { |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 612 | struct regmap *map; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 613 | int ret = -EINVAL; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 614 | enum regmap_endian reg_endian, val_endian; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 615 | int i, j; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 616 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 617 | if (!config) |
Lars-Peter Clausen | abbb18f | 2011-11-14 10:40:15 +0100 | [diff] [blame] | 618 | goto err; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 619 | |
| 620 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 621 | if (map == NULL) { |
| 622 | ret = -ENOMEM; |
| 623 | goto err; |
| 624 | } |
| 625 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 626 | if (config->lock && config->unlock) { |
| 627 | map->lock = config->lock; |
| 628 | map->unlock = config->unlock; |
| 629 | map->lock_arg = config->lock_arg; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 630 | } else { |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 631 | if ((bus && bus->fast_io) || |
| 632 | config->fast_io) { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 633 | spin_lock_init(&map->spinlock); |
| 634 | map->lock = regmap_lock_spinlock; |
| 635 | map->unlock = regmap_unlock_spinlock; |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 636 | lockdep_set_class_and_name(&map->spinlock, |
| 637 | lock_key, lock_name); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 638 | } else { |
| 639 | mutex_init(&map->mutex); |
| 640 | map->lock = regmap_lock_mutex; |
| 641 | map->unlock = regmap_unlock_mutex; |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 642 | lockdep_set_class_and_name(&map->mutex, |
| 643 | lock_key, lock_name); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 644 | } |
| 645 | map->lock_arg = map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 646 | } |
Stephen Boyd | b4a21fc | 2015-09-11 16:37:05 -0700 | [diff] [blame] | 647 | |
| 648 | /* |
| 649 | * When we write in fast-paths with regmap_bulk_write() don't allocate |
| 650 | * scratch buffers with sleeping allocations. |
| 651 | */ |
| 652 | if ((bus && bus->fast_io) || config->fast_io) |
| 653 | map->alloc_flags = GFP_ATOMIC; |
| 654 | else |
| 655 | map->alloc_flags = GFP_KERNEL; |
| 656 | |
Wolfram Sang | c212acc | 2012-01-28 02:16:41 +0100 | [diff] [blame] | 657 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 658 | map->format.pad_bytes = config->pad_bits / 8; |
Wolfram Sang | c212acc | 2012-01-28 02:16:41 +0100 | [diff] [blame] | 659 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
Fabio Estevam | 5494a98 | 2012-05-31 21:10:30 -0300 | [diff] [blame] | 660 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
| 661 | config->val_bits + config->pad_bits, 8); |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 662 | map->reg_shift = config->pad_bits % 8; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 663 | if (config->reg_stride) |
| 664 | map->reg_stride = config->reg_stride; |
| 665 | else |
| 666 | map->reg_stride = 1; |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 667 | if (is_power_of_2(map->reg_stride)) |
| 668 | map->reg_stride_order = ilog2(map->reg_stride); |
| 669 | else |
| 670 | map->reg_stride_order = -1; |
Markus Pargmann | 67921a1 | 2015-08-21 10:26:42 +0200 | [diff] [blame] | 671 | map->use_single_read = config->use_single_rw || !bus || !bus->read; |
| 672 | map->use_single_write = config->use_single_rw || !bus || !bus->write; |
Markus Pargmann | 9c9f7f6 | 2015-08-21 10:26:43 +0200 | [diff] [blame] | 673 | map->can_multi_write = config->can_multi_write && bus && bus->write; |
Sergey SENOZHATSKY | 17649c9 | 2015-08-31 18:54:58 +0900 | [diff] [blame] | 674 | if (bus) { |
| 675 | map->max_raw_read = bus->max_raw_read; |
| 676 | map->max_raw_write = bus->max_raw_write; |
| 677 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 678 | map->dev = dev; |
| 679 | map->bus = bus; |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 680 | map->bus_context = bus_context; |
Mark Brown | 2e2ae66 | 2011-07-20 22:33:39 +0100 | [diff] [blame] | 681 | map->max_register = config->max_register; |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 682 | map->wr_table = config->wr_table; |
| 683 | map->rd_table = config->rd_table; |
| 684 | map->volatile_table = config->volatile_table; |
| 685 | map->precious_table = config->precious_table; |
Mark Brown | 2e2ae66 | 2011-07-20 22:33:39 +0100 | [diff] [blame] | 686 | map->writeable_reg = config->writeable_reg; |
| 687 | map->readable_reg = config->readable_reg; |
| 688 | map->volatile_reg = config->volatile_reg; |
Mark Brown | 2efe164 | 2011-08-08 15:41:46 +0900 | [diff] [blame] | 689 | map->precious_reg = config->precious_reg; |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 690 | map->cache_type = config->cache_type; |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 691 | map->name = config->name; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 692 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 693 | spin_lock_init(&map->async_lock); |
| 694 | INIT_LIST_HEAD(&map->async_list); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 695 | INIT_LIST_HEAD(&map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 696 | init_waitqueue_head(&map->async_waitq); |
| 697 | |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 698 | if (config->read_flag_mask || config->write_flag_mask) { |
| 699 | map->read_flag_mask = config->read_flag_mask; |
| 700 | map->write_flag_mask = config->write_flag_mask; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 701 | } else if (bus) { |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 702 | map->read_flag_mask = bus->read_flag_mask; |
| 703 | } |
| 704 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 705 | if (!bus) { |
| 706 | map->reg_read = config->reg_read; |
| 707 | map->reg_write = config->reg_write; |
| 708 | |
| 709 | map->defer_caching = false; |
| 710 | goto skip_format_initialization; |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 711 | } else if (!bus->read || !bus->write) { |
| 712 | map->reg_read = _regmap_bus_reg_read; |
| 713 | map->reg_write = _regmap_bus_reg_write; |
| 714 | |
| 715 | map->defer_caching = false; |
| 716 | goto skip_format_initialization; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 717 | } else { |
| 718 | map->reg_read = _regmap_bus_read; |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame] | 719 | map->reg_update_bits = bus->reg_update_bits; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 720 | } |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 721 | |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 722 | reg_endian = regmap_get_reg_endian(bus, config); |
| 723 | val_endian = regmap_get_val_endian(dev, bus, config); |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 724 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 725 | switch (config->reg_bits + map->reg_shift) { |
Wolfram Sang | 9aa5075 | 2012-01-27 16:10:22 +0100 | [diff] [blame] | 726 | case 2: |
| 727 | switch (config->val_bits) { |
| 728 | case 6: |
| 729 | map->format.format_write = regmap_format_2_6_write; |
| 730 | break; |
| 731 | default: |
| 732 | goto err_map; |
| 733 | } |
| 734 | break; |
| 735 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 736 | case 4: |
| 737 | switch (config->val_bits) { |
| 738 | case 12: |
| 739 | map->format.format_write = regmap_format_4_12_write; |
| 740 | break; |
| 741 | default: |
| 742 | goto err_map; |
| 743 | } |
| 744 | break; |
| 745 | |
| 746 | case 7: |
| 747 | switch (config->val_bits) { |
| 748 | case 9: |
| 749 | map->format.format_write = regmap_format_7_9_write; |
| 750 | break; |
| 751 | default: |
| 752 | goto err_map; |
| 753 | } |
| 754 | break; |
| 755 | |
Lars-Peter Clausen | 7e5ec63 | 2011-11-16 16:28:21 +0100 | [diff] [blame] | 756 | case 10: |
| 757 | switch (config->val_bits) { |
| 758 | case 14: |
| 759 | map->format.format_write = regmap_format_10_14_write; |
| 760 | break; |
| 761 | default: |
| 762 | goto err_map; |
| 763 | } |
| 764 | break; |
| 765 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 766 | case 8: |
| 767 | map->format.format_reg = regmap_format_8; |
| 768 | break; |
| 769 | |
| 770 | case 16: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 771 | switch (reg_endian) { |
| 772 | case REGMAP_ENDIAN_BIG: |
| 773 | map->format.format_reg = regmap_format_16_be; |
| 774 | break; |
Tony Lindgren | 5556244 | 2016-09-15 13:56:11 -0700 | [diff] [blame] | 775 | case REGMAP_ENDIAN_LITTLE: |
| 776 | map->format.format_reg = regmap_format_16_le; |
| 777 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 778 | case REGMAP_ENDIAN_NATIVE: |
| 779 | map->format.format_reg = regmap_format_16_native; |
| 780 | break; |
| 781 | default: |
| 782 | goto err_map; |
| 783 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 784 | break; |
| 785 | |
Lars-Peter Clausen | 237019e | 2013-01-10 17:06:10 +0100 | [diff] [blame] | 786 | case 24: |
| 787 | if (reg_endian != REGMAP_ENDIAN_BIG) |
| 788 | goto err_map; |
| 789 | map->format.format_reg = regmap_format_24; |
| 790 | break; |
| 791 | |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 792 | case 32: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 793 | switch (reg_endian) { |
| 794 | case REGMAP_ENDIAN_BIG: |
| 795 | map->format.format_reg = regmap_format_32_be; |
| 796 | break; |
Tony Lindgren | 5556244 | 2016-09-15 13:56:11 -0700 | [diff] [blame] | 797 | case REGMAP_ENDIAN_LITTLE: |
| 798 | map->format.format_reg = regmap_format_32_le; |
| 799 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 800 | case REGMAP_ENDIAN_NATIVE: |
| 801 | map->format.format_reg = regmap_format_32_native; |
| 802 | break; |
| 803 | default: |
| 804 | goto err_map; |
| 805 | } |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 806 | break; |
| 807 | |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 808 | #ifdef CONFIG_64BIT |
| 809 | case 64: |
| 810 | switch (reg_endian) { |
| 811 | case REGMAP_ENDIAN_BIG: |
| 812 | map->format.format_reg = regmap_format_64_be; |
| 813 | break; |
Tony Lindgren | 5556244 | 2016-09-15 13:56:11 -0700 | [diff] [blame] | 814 | case REGMAP_ENDIAN_LITTLE: |
| 815 | map->format.format_reg = regmap_format_64_le; |
| 816 | break; |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 817 | case REGMAP_ENDIAN_NATIVE: |
| 818 | map->format.format_reg = regmap_format_64_native; |
| 819 | break; |
| 820 | default: |
| 821 | goto err_map; |
| 822 | } |
| 823 | break; |
| 824 | #endif |
| 825 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 826 | default: |
| 827 | goto err_map; |
| 828 | } |
| 829 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 830 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
| 831 | map->format.parse_inplace = regmap_parse_inplace_noop; |
| 832 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 833 | switch (config->val_bits) { |
| 834 | case 8: |
| 835 | map->format.format_val = regmap_format_8; |
| 836 | map->format.parse_val = regmap_parse_8; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 837 | map->format.parse_inplace = regmap_parse_inplace_noop; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 838 | break; |
| 839 | case 16: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 840 | switch (val_endian) { |
| 841 | case REGMAP_ENDIAN_BIG: |
| 842 | map->format.format_val = regmap_format_16_be; |
| 843 | map->format.parse_val = regmap_parse_16_be; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 844 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 845 | break; |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 846 | case REGMAP_ENDIAN_LITTLE: |
| 847 | map->format.format_val = regmap_format_16_le; |
| 848 | map->format.parse_val = regmap_parse_16_le; |
| 849 | map->format.parse_inplace = regmap_parse_16_le_inplace; |
| 850 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 851 | case REGMAP_ENDIAN_NATIVE: |
| 852 | map->format.format_val = regmap_format_16_native; |
| 853 | map->format.parse_val = regmap_parse_16_native; |
| 854 | break; |
| 855 | default: |
| 856 | goto err_map; |
| 857 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 858 | break; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 859 | case 24: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 860 | if (val_endian != REGMAP_ENDIAN_BIG) |
| 861 | goto err_map; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 862 | map->format.format_val = regmap_format_24; |
| 863 | map->format.parse_val = regmap_parse_24; |
| 864 | break; |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 865 | case 32: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 866 | switch (val_endian) { |
| 867 | case REGMAP_ENDIAN_BIG: |
| 868 | map->format.format_val = regmap_format_32_be; |
| 869 | map->format.parse_val = regmap_parse_32_be; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 870 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 871 | break; |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 872 | case REGMAP_ENDIAN_LITTLE: |
| 873 | map->format.format_val = regmap_format_32_le; |
| 874 | map->format.parse_val = regmap_parse_32_le; |
| 875 | map->format.parse_inplace = regmap_parse_32_le_inplace; |
| 876 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 877 | case REGMAP_ENDIAN_NATIVE: |
| 878 | map->format.format_val = regmap_format_32_native; |
| 879 | map->format.parse_val = regmap_parse_32_native; |
| 880 | break; |
| 881 | default: |
| 882 | goto err_map; |
| 883 | } |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 884 | break; |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 885 | #ifdef CONFIG_64BIT |
Dan Carpenter | 782035e | 2015-12-12 15:59:43 +0300 | [diff] [blame] | 886 | case 64: |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 887 | switch (val_endian) { |
| 888 | case REGMAP_ENDIAN_BIG: |
| 889 | map->format.format_val = regmap_format_64_be; |
| 890 | map->format.parse_val = regmap_parse_64_be; |
| 891 | map->format.parse_inplace = regmap_parse_64_be_inplace; |
| 892 | break; |
| 893 | case REGMAP_ENDIAN_LITTLE: |
| 894 | map->format.format_val = regmap_format_64_le; |
| 895 | map->format.parse_val = regmap_parse_64_le; |
| 896 | map->format.parse_inplace = regmap_parse_64_le_inplace; |
| 897 | break; |
| 898 | case REGMAP_ENDIAN_NATIVE: |
| 899 | map->format.format_val = regmap_format_64_native; |
| 900 | map->format.parse_val = regmap_parse_64_native; |
| 901 | break; |
| 902 | default: |
| 903 | goto err_map; |
| 904 | } |
| 905 | break; |
| 906 | #endif |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 907 | } |
| 908 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 909 | if (map->format.format_write) { |
| 910 | if ((reg_endian != REGMAP_ENDIAN_BIG) || |
| 911 | (val_endian != REGMAP_ENDIAN_BIG)) |
| 912 | goto err_map; |
Markus Pargmann | 67921a1 | 2015-08-21 10:26:42 +0200 | [diff] [blame] | 913 | map->use_single_write = true; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 914 | } |
Mark Brown | 7a64761 | 2012-04-30 23:26:32 +0100 | [diff] [blame] | 915 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 916 | if (!map->format.format_write && |
| 917 | !(map->format.format_reg && map->format.format_val)) |
| 918 | goto err_map; |
| 919 | |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 920 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 921 | if (map->work_buf == NULL) { |
| 922 | ret = -ENOMEM; |
Mark Brown | 5204f5e | 2011-09-05 08:07:47 -0700 | [diff] [blame] | 923 | goto err_map; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 924 | } |
| 925 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 926 | if (map->format.format_write) { |
| 927 | map->defer_caching = false; |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 928 | map->reg_write = _regmap_bus_formatted_write; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 929 | } else if (map->format.format_val) { |
| 930 | map->defer_caching = true; |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 931 | map->reg_write = _regmap_bus_raw_write; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | skip_format_initialization: |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 935 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 936 | map->range_tree = RB_ROOT; |
Mark Brown | e3549cd | 2012-10-02 20:17:15 +0100 | [diff] [blame] | 937 | for (i = 0; i < config->num_ranges; i++) { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 938 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
| 939 | struct regmap_range_node *new; |
| 940 | |
| 941 | /* Sanity check */ |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 942 | if (range_cfg->range_max < range_cfg->range_min) { |
| 943 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, |
| 944 | range_cfg->range_max, range_cfg->range_min); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 945 | goto err_range; |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 946 | } |
| 947 | |
| 948 | if (range_cfg->range_max > map->max_register) { |
| 949 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, |
| 950 | range_cfg->range_max, map->max_register); |
| 951 | goto err_range; |
| 952 | } |
| 953 | |
| 954 | if (range_cfg->selector_reg > map->max_register) { |
| 955 | dev_err(map->dev, |
| 956 | "Invalid range %d: selector out of map\n", i); |
| 957 | goto err_range; |
| 958 | } |
| 959 | |
| 960 | if (range_cfg->window_len == 0) { |
| 961 | dev_err(map->dev, "Invalid range %d: window_len 0\n", |
| 962 | i); |
| 963 | goto err_range; |
| 964 | } |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 965 | |
| 966 | /* Make sure, that this register range has no selector |
| 967 | or data window within its boundary */ |
Mark Brown | e3549cd | 2012-10-02 20:17:15 +0100 | [diff] [blame] | 968 | for (j = 0; j < config->num_ranges; j++) { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 969 | unsigned sel_reg = config->ranges[j].selector_reg; |
| 970 | unsigned win_min = config->ranges[j].window_start; |
| 971 | unsigned win_max = win_min + |
| 972 | config->ranges[j].window_len - 1; |
| 973 | |
Philipp Zabel | f161d22 | 2013-07-23 12:16:02 +0200 | [diff] [blame] | 974 | /* Allow data window inside its own virtual range */ |
| 975 | if (j == i) |
| 976 | continue; |
| 977 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 978 | if (range_cfg->range_min <= sel_reg && |
| 979 | sel_reg <= range_cfg->range_max) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 980 | dev_err(map->dev, |
| 981 | "Range %d: selector for %d in window\n", |
| 982 | i, j); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 983 | goto err_range; |
| 984 | } |
| 985 | |
| 986 | if (!(win_max < range_cfg->range_min || |
| 987 | win_min > range_cfg->range_max)) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 988 | dev_err(map->dev, |
| 989 | "Range %d: window for %d in window\n", |
| 990 | i, j); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 991 | goto err_range; |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
| 996 | if (new == NULL) { |
| 997 | ret = -ENOMEM; |
| 998 | goto err_range; |
| 999 | } |
| 1000 | |
Mark Brown | 4b020b3 | 2012-10-03 13:13:16 +0100 | [diff] [blame] | 1001 | new->map = map; |
Mark Brown | d058bb4 | 2012-10-03 12:40:47 +0100 | [diff] [blame] | 1002 | new->name = range_cfg->name; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1003 | new->range_min = range_cfg->range_min; |
| 1004 | new->range_max = range_cfg->range_max; |
| 1005 | new->selector_reg = range_cfg->selector_reg; |
| 1006 | new->selector_mask = range_cfg->selector_mask; |
| 1007 | new->selector_shift = range_cfg->selector_shift; |
| 1008 | new->window_start = range_cfg->window_start; |
| 1009 | new->window_len = range_cfg->window_len; |
| 1010 | |
Nenghua Cao | 53e87f8 | 2014-02-21 16:05:45 +0800 | [diff] [blame] | 1011 | if (!_regmap_range_add(map, new)) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 1012 | dev_err(map->dev, "Failed to add range %d\n", i); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1013 | kfree(new); |
| 1014 | goto err_range; |
| 1015 | } |
| 1016 | |
| 1017 | if (map->selector_work_buf == NULL) { |
| 1018 | map->selector_work_buf = |
| 1019 | kzalloc(map->format.buf_size, GFP_KERNEL); |
| 1020 | if (map->selector_work_buf == NULL) { |
| 1021 | ret = -ENOMEM; |
| 1022 | goto err_range; |
| 1023 | } |
| 1024 | } |
| 1025 | } |
Mark Brown | 052d2cd | 2011-11-21 19:05:13 +0000 | [diff] [blame] | 1026 | |
Lars-Peter Clausen | e5e3b8a | 2011-11-16 16:28:16 +0100 | [diff] [blame] | 1027 | ret = regcache_init(map, config); |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 1028 | if (ret != 0) |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1029 | goto err_range; |
| 1030 | |
Daeseok Youn | a7a037c | 2014-04-01 19:46:43 +0900 | [diff] [blame] | 1031 | if (dev) { |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 1032 | ret = regmap_attach_dev(dev, map, config); |
| 1033 | if (ret != 0) |
| 1034 | goto err_regcache; |
Daeseok Youn | a7a037c | 2014-04-01 19:46:43 +0900 | [diff] [blame] | 1035 | } |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 1036 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1037 | return map; |
| 1038 | |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 1039 | err_regcache: |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 1040 | regcache_exit(map); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1041 | err_range: |
| 1042 | regmap_range_exit(map); |
Lars-Peter Clausen | 58072cb | 2011-11-10 18:15:15 +0100 | [diff] [blame] | 1043 | kfree(map->work_buf); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1044 | err_map: |
| 1045 | kfree(map); |
| 1046 | err: |
| 1047 | return ERR_PTR(ret); |
| 1048 | } |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 1049 | EXPORT_SYMBOL_GPL(__regmap_init); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1050 | |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 1051 | static void devm_regmap_release(struct device *dev, void *res) |
| 1052 | { |
| 1053 | regmap_exit(*(struct regmap **)res); |
| 1054 | } |
| 1055 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 1056 | struct regmap *__devm_regmap_init(struct device *dev, |
| 1057 | const struct regmap_bus *bus, |
| 1058 | void *bus_context, |
| 1059 | const struct regmap_config *config, |
| 1060 | struct lock_class_key *lock_key, |
| 1061 | const char *lock_name) |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 1062 | { |
| 1063 | struct regmap **ptr, *regmap; |
| 1064 | |
| 1065 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); |
| 1066 | if (!ptr) |
| 1067 | return ERR_PTR(-ENOMEM); |
| 1068 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 1069 | regmap = __regmap_init(dev, bus, bus_context, config, |
| 1070 | lock_key, lock_name); |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 1071 | if (!IS_ERR(regmap)) { |
| 1072 | *ptr = regmap; |
| 1073 | devres_add(dev, ptr); |
| 1074 | } else { |
| 1075 | devres_free(ptr); |
| 1076 | } |
| 1077 | |
| 1078 | return regmap; |
| 1079 | } |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 1080 | EXPORT_SYMBOL_GPL(__devm_regmap_init); |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 1081 | |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 1082 | static void regmap_field_init(struct regmap_field *rm_field, |
| 1083 | struct regmap *regmap, struct reg_field reg_field) |
| 1084 | { |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 1085 | rm_field->regmap = regmap; |
| 1086 | rm_field->reg = reg_field.reg; |
| 1087 | rm_field->shift = reg_field.lsb; |
Maxime Coquelin | 921cc29 | 2015-06-16 13:53:19 +0200 | [diff] [blame] | 1088 | rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb); |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1089 | rm_field->id_size = reg_field.id_size; |
| 1090 | rm_field->id_offset = reg_field.id_offset; |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | /** |
| 1094 | * devm_regmap_field_alloc(): Allocate and initialise a register field |
| 1095 | * in a register map. |
| 1096 | * |
| 1097 | * @dev: Device that will be interacted with |
| 1098 | * @regmap: regmap bank in which this register field is located. |
| 1099 | * @reg_field: Register field with in the bank. |
| 1100 | * |
| 1101 | * The return value will be an ERR_PTR() on error or a valid pointer |
| 1102 | * to a struct regmap_field. The regmap_field will be automatically freed |
| 1103 | * by the device management code. |
| 1104 | */ |
| 1105 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, |
| 1106 | struct regmap *regmap, struct reg_field reg_field) |
| 1107 | { |
| 1108 | struct regmap_field *rm_field = devm_kzalloc(dev, |
| 1109 | sizeof(*rm_field), GFP_KERNEL); |
| 1110 | if (!rm_field) |
| 1111 | return ERR_PTR(-ENOMEM); |
| 1112 | |
| 1113 | regmap_field_init(rm_field, regmap, reg_field); |
| 1114 | |
| 1115 | return rm_field; |
| 1116 | |
| 1117 | } |
| 1118 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); |
| 1119 | |
| 1120 | /** |
| 1121 | * devm_regmap_field_free(): Free register field allocated using |
| 1122 | * devm_regmap_field_alloc. Usally drivers need not call this function, |
| 1123 | * as the memory allocated via devm will be freed as per device-driver |
| 1124 | * life-cyle. |
| 1125 | * |
| 1126 | * @dev: Device that will be interacted with |
| 1127 | * @field: regmap field which should be freed. |
| 1128 | */ |
| 1129 | void devm_regmap_field_free(struct device *dev, |
| 1130 | struct regmap_field *field) |
| 1131 | { |
| 1132 | devm_kfree(dev, field); |
| 1133 | } |
| 1134 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); |
| 1135 | |
| 1136 | /** |
| 1137 | * regmap_field_alloc(): Allocate and initialise a register field |
| 1138 | * in a register map. |
| 1139 | * |
| 1140 | * @regmap: regmap bank in which this register field is located. |
| 1141 | * @reg_field: Register field with in the bank. |
| 1142 | * |
| 1143 | * The return value will be an ERR_PTR() on error or a valid pointer |
| 1144 | * to a struct regmap_field. The regmap_field should be freed by the |
| 1145 | * user once its finished working with it using regmap_field_free(). |
| 1146 | */ |
| 1147 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, |
| 1148 | struct reg_field reg_field) |
| 1149 | { |
| 1150 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); |
| 1151 | |
| 1152 | if (!rm_field) |
| 1153 | return ERR_PTR(-ENOMEM); |
| 1154 | |
| 1155 | regmap_field_init(rm_field, regmap, reg_field); |
| 1156 | |
| 1157 | return rm_field; |
| 1158 | } |
| 1159 | EXPORT_SYMBOL_GPL(regmap_field_alloc); |
| 1160 | |
| 1161 | /** |
| 1162 | * regmap_field_free(): Free register field allocated using regmap_field_alloc |
| 1163 | * |
| 1164 | * @field: regmap field which should be freed. |
| 1165 | */ |
| 1166 | void regmap_field_free(struct regmap_field *field) |
| 1167 | { |
| 1168 | kfree(field); |
| 1169 | } |
| 1170 | EXPORT_SYMBOL_GPL(regmap_field_free); |
| 1171 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1172 | /** |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1173 | * regmap_reinit_cache(): Reinitialise the current register cache |
| 1174 | * |
| 1175 | * @map: Register map to operate on. |
| 1176 | * @config: New configuration. Only the cache data will be used. |
| 1177 | * |
| 1178 | * Discard any existing register cache for the map and initialize a |
| 1179 | * new cache. This can be used to restore the cache to defaults or to |
| 1180 | * update the cache configuration to reflect runtime discovery of the |
| 1181 | * hardware. |
Dimitris Papastamos | 4d87951 | 2012-07-27 14:54:15 +0100 | [diff] [blame] | 1182 | * |
| 1183 | * No explicit locking is done here, the user needs to ensure that |
| 1184 | * this function will not race with other calls to regmap. |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1185 | */ |
| 1186 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) |
| 1187 | { |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1188 | regcache_exit(map); |
Mark Brown | a24f64a | 2012-01-26 18:30:16 +0000 | [diff] [blame] | 1189 | regmap_debugfs_exit(map); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1190 | |
| 1191 | map->max_register = config->max_register; |
| 1192 | map->writeable_reg = config->writeable_reg; |
| 1193 | map->readable_reg = config->readable_reg; |
| 1194 | map->volatile_reg = config->volatile_reg; |
| 1195 | map->precious_reg = config->precious_reg; |
| 1196 | map->cache_type = config->cache_type; |
| 1197 | |
Stephen Warren | d3c242e | 2012-04-04 15:48:29 -0600 | [diff] [blame] | 1198 | regmap_debugfs_init(map, config->name); |
Mark Brown | a24f64a | 2012-01-26 18:30:16 +0000 | [diff] [blame] | 1199 | |
Mark Brown | 421e8d2 | 2012-01-20 13:39:37 +0000 | [diff] [blame] | 1200 | map->cache_bypass = false; |
| 1201 | map->cache_only = false; |
| 1202 | |
Dimitris Papastamos | 4d87951 | 2012-07-27 14:54:15 +0100 | [diff] [blame] | 1203 | return regcache_init(map, config); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1204 | } |
Mark Brown | 752a6a5 | 2012-05-14 10:00:12 +0100 | [diff] [blame] | 1205 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1206 | |
| 1207 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1208 | * regmap_exit(): Free a previously allocated register map |
| 1209 | */ |
| 1210 | void regmap_exit(struct regmap *map) |
| 1211 | { |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1212 | struct regmap_async *async; |
| 1213 | |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1214 | regcache_exit(map); |
Mark Brown | 31244e3 | 2011-07-20 22:56:53 +0100 | [diff] [blame] | 1215 | regmap_debugfs_exit(map); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1216 | regmap_range_exit(map); |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1217 | if (map->bus && map->bus->free_context) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1218 | map->bus->free_context(map->bus_context); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1219 | kfree(map->work_buf); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1220 | while (!list_empty(&map->async_free)) { |
| 1221 | async = list_first_entry_or_null(&map->async_free, |
| 1222 | struct regmap_async, |
| 1223 | list); |
| 1224 | list_del(&async->list); |
| 1225 | kfree(async->work_buf); |
| 1226 | kfree(async); |
| 1227 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1228 | kfree(map); |
| 1229 | } |
| 1230 | EXPORT_SYMBOL_GPL(regmap_exit); |
| 1231 | |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 1232 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
| 1233 | { |
| 1234 | struct regmap **r = res; |
| 1235 | if (!r || !*r) { |
| 1236 | WARN_ON(!r || !*r); |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | /* If the user didn't specify a name match any */ |
| 1241 | if (data) |
| 1242 | return (*r)->name == data; |
| 1243 | else |
| 1244 | return 1; |
| 1245 | } |
| 1246 | |
| 1247 | /** |
| 1248 | * dev_get_regmap(): Obtain the regmap (if any) for a device |
| 1249 | * |
| 1250 | * @dev: Device to retrieve the map for |
| 1251 | * @name: Optional name for the register map, usually NULL. |
| 1252 | * |
| 1253 | * Returns the regmap for the device if one is present, or NULL. If |
| 1254 | * name is specified then it must match the name specified when |
| 1255 | * registering the device, if it is NULL then the first regmap found |
| 1256 | * will be used. Devices with multiple register maps are very rare, |
| 1257 | * generic code should normally not need to specify a name. |
| 1258 | */ |
| 1259 | struct regmap *dev_get_regmap(struct device *dev, const char *name) |
| 1260 | { |
| 1261 | struct regmap **r = devres_find(dev, dev_get_regmap_release, |
| 1262 | dev_get_regmap_match, (void *)name); |
| 1263 | |
| 1264 | if (!r) |
| 1265 | return NULL; |
| 1266 | return *r; |
| 1267 | } |
| 1268 | EXPORT_SYMBOL_GPL(dev_get_regmap); |
| 1269 | |
Tuomas Tynkkynen | 8d7d397 | 2014-07-21 18:38:47 +0300 | [diff] [blame] | 1270 | /** |
| 1271 | * regmap_get_device(): Obtain the device from a regmap |
| 1272 | * |
| 1273 | * @map: Register map to operate on. |
| 1274 | * |
| 1275 | * Returns the underlying device that the regmap has been created for. |
| 1276 | */ |
| 1277 | struct device *regmap_get_device(struct regmap *map) |
| 1278 | { |
| 1279 | return map->dev; |
| 1280 | } |
Mark Brown | fa2fbe4 | 2014-07-25 18:30:31 +0100 | [diff] [blame] | 1281 | EXPORT_SYMBOL_GPL(regmap_get_device); |
Tuomas Tynkkynen | 8d7d397 | 2014-07-21 18:38:47 +0300 | [diff] [blame] | 1282 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1283 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1284 | struct regmap_range_node *range, |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1285 | unsigned int val_num) |
| 1286 | { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1287 | void *orig_work_buf; |
| 1288 | unsigned int win_offset; |
| 1289 | unsigned int win_page; |
| 1290 | bool page_chg; |
| 1291 | int ret; |
| 1292 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1293 | win_offset = (*reg - range->range_min) % range->window_len; |
| 1294 | win_page = (*reg - range->range_min) / range->window_len; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1295 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1296 | if (val_num > 1) { |
| 1297 | /* Bulk write shouldn't cross range boundary */ |
| 1298 | if (*reg + val_num - 1 > range->range_max) |
| 1299 | return -EINVAL; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1300 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1301 | /* ... or single page boundary */ |
| 1302 | if (val_num > range->window_len - win_offset) |
| 1303 | return -EINVAL; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1304 | } |
| 1305 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1306 | /* It is possible to have selector register inside data window. |
| 1307 | In that case, selector register is located on every page and |
| 1308 | it needs no page switching, when accessed alone. */ |
| 1309 | if (val_num > 1 || |
| 1310 | range->window_start + win_offset != range->selector_reg) { |
| 1311 | /* Use separate work_buf during page switching */ |
| 1312 | orig_work_buf = map->work_buf; |
| 1313 | map->work_buf = map->selector_work_buf; |
| 1314 | |
| 1315 | ret = _regmap_update_bits(map, range->selector_reg, |
| 1316 | range->selector_mask, |
| 1317 | win_page << range->selector_shift, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 1318 | &page_chg, false); |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1319 | |
| 1320 | map->work_buf = orig_work_buf; |
| 1321 | |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 1322 | if (ret != 0) |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1323 | return ret; |
| 1324 | } |
| 1325 | |
| 1326 | *reg = range->window_start + win_offset; |
| 1327 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1328 | return 0; |
| 1329 | } |
| 1330 | |
Tony Lindgren | f50e38c | 2016-09-15 13:56:10 -0700 | [diff] [blame] | 1331 | static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes, |
| 1332 | unsigned long mask) |
| 1333 | { |
| 1334 | u8 *buf; |
| 1335 | int i; |
| 1336 | |
| 1337 | if (!mask || !map->work_buf) |
| 1338 | return; |
| 1339 | |
| 1340 | buf = map->work_buf; |
| 1341 | |
| 1342 | for (i = 0; i < max_bytes; i++) |
| 1343 | buf[i] |= (mask >> (8 * i)) & 0xff; |
| 1344 | } |
| 1345 | |
Mark Brown | 584de32 | 2013-03-13 19:19:34 +0000 | [diff] [blame] | 1346 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1347 | const void *val, size_t val_len) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1348 | { |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1349 | struct regmap_range_node *range; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1350 | unsigned long flags; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1351 | void *work_val = map->work_buf + map->format.reg_bytes + |
| 1352 | map->format.pad_bytes; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1353 | void *buf; |
| 1354 | int ret = -ENOTSUPP; |
| 1355 | size_t len; |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1356 | int i; |
| 1357 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1358 | WARN_ON(!map->bus); |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1359 | |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1360 | /* Check for unwritable registers before we start */ |
| 1361 | if (map->writeable_reg) |
| 1362 | for (i = 0; i < val_len / map->format.val_bytes; i++) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1363 | if (!map->writeable_reg(map->dev, |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 1364 | reg + regmap_get_offset(map, i))) |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1365 | return -EINVAL; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1366 | |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1367 | if (!map->cache_bypass && map->format.parse_val) { |
| 1368 | unsigned int ival; |
| 1369 | int val_bytes = map->format.val_bytes; |
| 1370 | for (i = 0; i < val_len / val_bytes; i++) { |
Stephen Warren | 5a08d15 | 2013-03-20 17:02:02 -0600 | [diff] [blame] | 1371 | ival = map->format.parse_val(val + (i * val_bytes)); |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 1372 | ret = regcache_write(map, |
| 1373 | reg + regmap_get_offset(map, i), |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1374 | ival); |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1375 | if (ret) { |
| 1376 | dev_err(map->dev, |
Mark Brown | 6d04b8a | 2012-10-26 19:05:32 +0100 | [diff] [blame] | 1377 | "Error in caching of register: %x ret: %d\n", |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1378 | reg + i, ret); |
| 1379 | return ret; |
| 1380 | } |
| 1381 | } |
| 1382 | if (map->cache_only) { |
| 1383 | map->cache_dirty = true; |
| 1384 | return 0; |
| 1385 | } |
| 1386 | } |
| 1387 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1388 | range = _regmap_range_lookup(map, reg); |
| 1389 | if (range) { |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1390 | int val_num = val_len / map->format.val_bytes; |
| 1391 | int win_offset = (reg - range->range_min) % range->window_len; |
| 1392 | int win_residue = range->window_len - win_offset; |
| 1393 | |
| 1394 | /* If the write goes beyond the end of the window split it */ |
| 1395 | while (val_num > win_residue) { |
Fabio Estevam | 1a61cfe | 2012-10-25 14:07:18 -0200 | [diff] [blame] | 1396 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1397 | win_residue, val_len / map->format.val_bytes); |
| 1398 | ret = _regmap_raw_write(map, reg, val, win_residue * |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1399 | map->format.val_bytes); |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1400 | if (ret != 0) |
| 1401 | return ret; |
| 1402 | |
| 1403 | reg += win_residue; |
| 1404 | val_num -= win_residue; |
| 1405 | val += win_residue * map->format.val_bytes; |
| 1406 | val_len -= win_residue * map->format.val_bytes; |
| 1407 | |
| 1408 | win_offset = (reg - range->range_min) % |
| 1409 | range->window_len; |
| 1410 | win_residue = range->window_len - win_offset; |
| 1411 | } |
| 1412 | |
| 1413 | ret = _regmap_select_page(map, ®, range, val_num); |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 1414 | if (ret != 0) |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1415 | return ret; |
| 1416 | } |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1417 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 1418 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
Tony Lindgren | f50e38c | 2016-09-15 13:56:10 -0700 | [diff] [blame] | 1419 | regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, |
| 1420 | map->write_flag_mask); |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 1421 | |
Mark Brown | 651e013 | 2013-10-08 18:37:36 +0100 | [diff] [blame] | 1422 | /* |
| 1423 | * Essentially all I/O mechanisms will be faster with a single |
| 1424 | * buffer to write. Since register syncs often generate raw |
| 1425 | * writes of single registers optimise that case. |
| 1426 | */ |
| 1427 | if (val != work_val && val_len == map->format.val_bytes) { |
| 1428 | memcpy(work_val, val, map->format.val_bytes); |
| 1429 | val = work_val; |
| 1430 | } |
| 1431 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1432 | if (map->async && map->bus->async_write) { |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1433 | struct regmap_async *async; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1434 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1435 | trace_regmap_async_write_start(map, reg, val_len); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 1436 | |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1437 | spin_lock_irqsave(&map->async_lock, flags); |
| 1438 | async = list_first_entry_or_null(&map->async_free, |
| 1439 | struct regmap_async, |
| 1440 | list); |
| 1441 | if (async) |
| 1442 | list_del(&async->list); |
| 1443 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 1444 | |
| 1445 | if (!async) { |
| 1446 | async = map->bus->async_alloc(); |
| 1447 | if (!async) |
| 1448 | return -ENOMEM; |
| 1449 | |
| 1450 | async->work_buf = kzalloc(map->format.buf_size, |
| 1451 | GFP_KERNEL | GFP_DMA); |
| 1452 | if (!async->work_buf) { |
| 1453 | kfree(async); |
| 1454 | return -ENOMEM; |
| 1455 | } |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1456 | } |
| 1457 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1458 | async->map = map; |
| 1459 | |
| 1460 | /* If the caller supplied the value we can use it safely. */ |
| 1461 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + |
| 1462 | map->format.reg_bytes + map->format.val_bytes); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1463 | |
| 1464 | spin_lock_irqsave(&map->async_lock, flags); |
| 1465 | list_add_tail(&async->list, &map->async_list); |
| 1466 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 1467 | |
Mark Brown | 04c50cc | 2013-10-10 22:38:29 +0100 | [diff] [blame] | 1468 | if (val != work_val) |
| 1469 | ret = map->bus->async_write(map->bus_context, |
| 1470 | async->work_buf, |
| 1471 | map->format.reg_bytes + |
| 1472 | map->format.pad_bytes, |
| 1473 | val, val_len, async); |
| 1474 | else |
| 1475 | ret = map->bus->async_write(map->bus_context, |
| 1476 | async->work_buf, |
| 1477 | map->format.reg_bytes + |
| 1478 | map->format.pad_bytes + |
| 1479 | val_len, NULL, 0, async); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1480 | |
| 1481 | if (ret != 0) { |
| 1482 | dev_err(map->dev, "Failed to schedule write: %d\n", |
| 1483 | ret); |
| 1484 | |
| 1485 | spin_lock_irqsave(&map->async_lock, flags); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1486 | list_move(&async->list, &map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1487 | spin_unlock_irqrestore(&map->async_lock, flags); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1488 | } |
Mark Brown | f951b65 | 2013-03-27 13:08:44 +0000 | [diff] [blame] | 1489 | |
| 1490 | return ret; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1491 | } |
| 1492 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1493 | trace_regmap_hw_write_start(map, reg, val_len / map->format.val_bytes); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1494 | |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1495 | /* If we're doing a single register write we can probably just |
| 1496 | * send the work_buf directly, otherwise try to do a gather |
| 1497 | * write. |
| 1498 | */ |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1499 | if (val == work_val) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1500 | ret = map->bus->write(map->bus_context, map->work_buf, |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1501 | map->format.reg_bytes + |
| 1502 | map->format.pad_bytes + |
| 1503 | val_len); |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1504 | else if (map->bus->gather_write) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1505 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1506 | map->format.reg_bytes + |
| 1507 | map->format.pad_bytes, |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1508 | val, val_len); |
Srinivas Kandagatla | f84e5a7 | 2019-06-12 12:03:43 +0100 | [diff] [blame] | 1509 | else |
| 1510 | ret = -ENOTSUPP; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1511 | |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1512 | /* If that didn't work fall back on linearising by hand. */ |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1513 | if (ret == -ENOTSUPP) { |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1514 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
| 1515 | buf = kzalloc(len, GFP_KERNEL); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1516 | if (!buf) |
| 1517 | return -ENOMEM; |
| 1518 | |
| 1519 | memcpy(buf, map->work_buf, map->format.reg_bytes); |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1520 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
| 1521 | val, val_len); |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1522 | ret = map->bus->write(map->bus_context, buf, len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1523 | |
| 1524 | kfree(buf); |
Elaine Zhang | 815806e | 2016-08-18 17:01:55 +0800 | [diff] [blame] | 1525 | } else if (ret != 0 && !map->cache_bypass && map->format.parse_val) { |
Nikita Yushchenko | f0aa1ce | 2016-09-22 12:02:25 +0300 | [diff] [blame] | 1526 | /* regcache_drop_region() takes lock that we already have, |
| 1527 | * thus call map->cache_ops->drop() directly |
| 1528 | */ |
| 1529 | if (map->cache_ops && map->cache_ops->drop) |
| 1530 | map->cache_ops->drop(map, reg, reg + 1); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1531 | } |
| 1532 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1533 | trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1534 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1535 | return ret; |
| 1536 | } |
| 1537 | |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1538 | /** |
| 1539 | * regmap_can_raw_write - Test if regmap_raw_write() is supported |
| 1540 | * |
| 1541 | * @map: Map to check. |
| 1542 | */ |
| 1543 | bool regmap_can_raw_write(struct regmap *map) |
| 1544 | { |
Markus Pargmann | 07ea400 | 2015-08-12 12:12:33 +0200 | [diff] [blame] | 1545 | return map->bus && map->bus->write && map->format.format_val && |
| 1546 | map->format.format_reg; |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1547 | } |
| 1548 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); |
| 1549 | |
Markus Pargmann | f50c9eb | 2015-08-30 09:33:54 +0200 | [diff] [blame] | 1550 | /** |
| 1551 | * regmap_get_raw_read_max - Get the maximum size we can read |
| 1552 | * |
| 1553 | * @map: Map to check. |
| 1554 | */ |
| 1555 | size_t regmap_get_raw_read_max(struct regmap *map) |
| 1556 | { |
| 1557 | return map->max_raw_read; |
| 1558 | } |
| 1559 | EXPORT_SYMBOL_GPL(regmap_get_raw_read_max); |
| 1560 | |
| 1561 | /** |
| 1562 | * regmap_get_raw_write_max - Get the maximum size we can read |
| 1563 | * |
| 1564 | * @map: Map to check. |
| 1565 | */ |
| 1566 | size_t regmap_get_raw_write_max(struct regmap *map) |
| 1567 | { |
| 1568 | return map->max_raw_write; |
| 1569 | } |
| 1570 | EXPORT_SYMBOL_GPL(regmap_get_raw_write_max); |
| 1571 | |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1572 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
| 1573 | unsigned int val) |
| 1574 | { |
| 1575 | int ret; |
| 1576 | struct regmap_range_node *range; |
| 1577 | struct regmap *map = context; |
| 1578 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1579 | WARN_ON(!map->bus || !map->format.format_write); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1580 | |
| 1581 | range = _regmap_range_lookup(map, reg); |
| 1582 | if (range) { |
| 1583 | ret = _regmap_select_page(map, ®, range, 1); |
| 1584 | if (ret != 0) |
| 1585 | return ret; |
| 1586 | } |
| 1587 | |
| 1588 | map->format.format_write(map, reg, val); |
| 1589 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1590 | trace_regmap_hw_write_start(map, reg, 1); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1591 | |
| 1592 | ret = map->bus->write(map->bus_context, map->work_buf, |
| 1593 | map->format.buf_size); |
| 1594 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1595 | trace_regmap_hw_write_done(map, reg, 1); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1596 | |
| 1597 | return ret; |
| 1598 | } |
| 1599 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 1600 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
| 1601 | unsigned int val) |
| 1602 | { |
| 1603 | struct regmap *map = context; |
| 1604 | |
| 1605 | return map->bus->reg_write(map->bus_context, reg, val); |
| 1606 | } |
| 1607 | |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1608 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
| 1609 | unsigned int val) |
| 1610 | { |
| 1611 | struct regmap *map = context; |
| 1612 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1613 | WARN_ON(!map->bus || !map->format.format_val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1614 | |
| 1615 | map->format.format_val(map->work_buf + map->format.reg_bytes |
| 1616 | + map->format.pad_bytes, val, 0); |
| 1617 | return _regmap_raw_write(map, reg, |
| 1618 | map->work_buf + |
| 1619 | map->format.reg_bytes + |
| 1620 | map->format.pad_bytes, |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1621 | map->format.val_bytes); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1622 | } |
| 1623 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1624 | static inline void *_regmap_map_get_context(struct regmap *map) |
| 1625 | { |
| 1626 | return (map->bus) ? map : map->bus_context; |
| 1627 | } |
| 1628 | |
Dimitris Papastamos | 4d2dc09 | 2011-09-29 10:39:07 +0100 | [diff] [blame] | 1629 | int _regmap_write(struct regmap *map, unsigned int reg, |
| 1630 | unsigned int val) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1631 | { |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1632 | int ret; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1633 | void *context = _regmap_map_get_context(map); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1634 | |
Ionut Nicu | 515f226 | 2013-08-09 12:09:20 +0200 | [diff] [blame] | 1635 | if (!regmap_writeable(map, reg)) |
| 1636 | return -EIO; |
| 1637 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1638 | if (!map->cache_bypass && !map->defer_caching) { |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1639 | ret = regcache_write(map, reg, val); |
| 1640 | if (ret != 0) |
| 1641 | return ret; |
Mark Brown | 8ae0d7e | 2011-10-26 10:34:22 +0200 | [diff] [blame] | 1642 | if (map->cache_only) { |
| 1643 | map->cache_dirty = true; |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1644 | return 0; |
Mark Brown | 8ae0d7e | 2011-10-26 10:34:22 +0200 | [diff] [blame] | 1645 | } |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1646 | } |
| 1647 | |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 1648 | #ifdef LOG_DEVICE |
Pankaj Dubey | 5336be8 | 2014-09-27 09:47:55 +0530 | [diff] [blame] | 1649 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 1650 | dev_info(map->dev, "%x <= %x\n", reg, val); |
| 1651 | #endif |
| 1652 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1653 | trace_regmap_reg_write(map, reg, val); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1654 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1655 | return map->reg_write(context, reg, val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1656 | } |
| 1657 | |
| 1658 | /** |
| 1659 | * regmap_write(): Write a value to a single register |
| 1660 | * |
| 1661 | * @map: Register map to write to |
| 1662 | * @reg: Register to write to |
| 1663 | * @val: Value to be written |
| 1664 | * |
| 1665 | * A value of zero will be returned on success, a negative errno will |
| 1666 | * be returned in error cases. |
| 1667 | */ |
| 1668 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) |
| 1669 | { |
| 1670 | int ret; |
| 1671 | |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 1672 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1673 | return -EINVAL; |
| 1674 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1675 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1676 | |
| 1677 | ret = _regmap_write(map, reg, val); |
| 1678 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1679 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1680 | |
| 1681 | return ret; |
| 1682 | } |
| 1683 | EXPORT_SYMBOL_GPL(regmap_write); |
| 1684 | |
| 1685 | /** |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 1686 | * regmap_write_async(): Write a value to a single register asynchronously |
| 1687 | * |
| 1688 | * @map: Register map to write to |
| 1689 | * @reg: Register to write to |
| 1690 | * @val: Value to be written |
| 1691 | * |
| 1692 | * A value of zero will be returned on success, a negative errno will |
| 1693 | * be returned in error cases. |
| 1694 | */ |
| 1695 | int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) |
| 1696 | { |
| 1697 | int ret; |
| 1698 | |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 1699 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 1700 | return -EINVAL; |
| 1701 | |
| 1702 | map->lock(map->lock_arg); |
| 1703 | |
| 1704 | map->async = true; |
| 1705 | |
| 1706 | ret = _regmap_write(map, reg, val); |
| 1707 | |
| 1708 | map->async = false; |
| 1709 | |
| 1710 | map->unlock(map->lock_arg); |
| 1711 | |
| 1712 | return ret; |
| 1713 | } |
| 1714 | EXPORT_SYMBOL_GPL(regmap_write_async); |
| 1715 | |
| 1716 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1717 | * regmap_raw_write(): Write raw values to one or more registers |
| 1718 | * |
| 1719 | * @map: Register map to write to |
| 1720 | * @reg: Initial register to write to |
| 1721 | * @val: Block of data to be written, laid out for direct transmission to the |
| 1722 | * device |
| 1723 | * @val_len: Length of data pointed to by val. |
| 1724 | * |
| 1725 | * This function is intended to be used for things like firmware |
| 1726 | * download where a large block of data needs to be transferred to the |
| 1727 | * device. No formatting will be done on the data provided. |
| 1728 | * |
| 1729 | * A value of zero will be returned on success, a negative errno will |
| 1730 | * be returned in error cases. |
| 1731 | */ |
| 1732 | int regmap_raw_write(struct regmap *map, unsigned int reg, |
| 1733 | const void *val, size_t val_len) |
| 1734 | { |
| 1735 | int ret; |
| 1736 | |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1737 | if (!regmap_can_raw_write(map)) |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1738 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 1739 | if (val_len % map->format.val_bytes) |
| 1740 | return -EINVAL; |
Dan Carpenter | cddf0e1 | 2018-02-08 10:23:44 +0300 | [diff] [blame] | 1741 | if (map->max_raw_write && map->max_raw_write < val_len) |
Markus Pargmann | c335931 | 2015-08-30 09:33:55 +0200 | [diff] [blame] | 1742 | return -E2BIG; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 1743 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1744 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1745 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1746 | ret = _regmap_raw_write(map, reg, val, val_len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1747 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1748 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1749 | |
| 1750 | return ret; |
| 1751 | } |
| 1752 | EXPORT_SYMBOL_GPL(regmap_raw_write); |
| 1753 | |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 1754 | /** |
Kuninori Morimoto | 28972eaa | 2016-02-15 05:23:55 +0000 | [diff] [blame] | 1755 | * regmap_field_update_bits_base(): |
| 1756 | * Perform a read/modify/write cycle on the register field |
| 1757 | * with change, async, force option |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1758 | * |
| 1759 | * @field: Register field to write to |
| 1760 | * @mask: Bitmask to change |
| 1761 | * @val: Value to be written |
Kuninori Morimoto | 28972eaa | 2016-02-15 05:23:55 +0000 | [diff] [blame] | 1762 | * @change: Boolean indicating if a write was done |
| 1763 | * @async: Boolean indicating asynchronously |
| 1764 | * @force: Boolean indicating use force update |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1765 | * |
| 1766 | * A value of zero will be returned on success, a negative errno will |
| 1767 | * be returned in error cases. |
| 1768 | */ |
Kuninori Morimoto | 28972eaa | 2016-02-15 05:23:55 +0000 | [diff] [blame] | 1769 | int regmap_field_update_bits_base(struct regmap_field *field, |
| 1770 | unsigned int mask, unsigned int val, |
| 1771 | bool *change, bool async, bool force) |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1772 | { |
| 1773 | mask = (mask << field->shift) & field->mask; |
| 1774 | |
Kuninori Morimoto | 28972eaa | 2016-02-15 05:23:55 +0000 | [diff] [blame] | 1775 | return regmap_update_bits_base(field->regmap, field->reg, |
| 1776 | mask, val << field->shift, |
| 1777 | change, async, force); |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1778 | } |
Kuninori Morimoto | 28972eaa | 2016-02-15 05:23:55 +0000 | [diff] [blame] | 1779 | EXPORT_SYMBOL_GPL(regmap_field_update_bits_base); |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1780 | |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1781 | /** |
Kuninori Morimoto | e126ede | 2016-02-15 05:24:51 +0000 | [diff] [blame] | 1782 | * regmap_fields_update_bits_base(): |
| 1783 | * Perform a read/modify/write cycle on the register field |
| 1784 | * with change, async, force option |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1785 | * |
| 1786 | * @field: Register field to write to |
| 1787 | * @id: port ID |
| 1788 | * @mask: Bitmask to change |
| 1789 | * @val: Value to be written |
Kuninori Morimoto | e126ede | 2016-02-15 05:24:51 +0000 | [diff] [blame] | 1790 | * @change: Boolean indicating if a write was done |
| 1791 | * @async: Boolean indicating asynchronously |
| 1792 | * @force: Boolean indicating use force update |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1793 | * |
| 1794 | * A value of zero will be returned on success, a negative errno will |
| 1795 | * be returned in error cases. |
| 1796 | */ |
Kuninori Morimoto | e126ede | 2016-02-15 05:24:51 +0000 | [diff] [blame] | 1797 | int regmap_fields_update_bits_base(struct regmap_field *field, unsigned int id, |
| 1798 | unsigned int mask, unsigned int val, |
| 1799 | bool *change, bool async, bool force) |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1800 | { |
| 1801 | if (id >= field->id_size) |
| 1802 | return -EINVAL; |
| 1803 | |
| 1804 | mask = (mask << field->shift) & field->mask; |
| 1805 | |
Kuninori Morimoto | e126ede | 2016-02-15 05:24:51 +0000 | [diff] [blame] | 1806 | return regmap_update_bits_base(field->regmap, |
| 1807 | field->reg + (field->id_offset * id), |
| 1808 | mask, val << field->shift, |
| 1809 | change, async, force); |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1810 | } |
Kuninori Morimoto | e126ede | 2016-02-15 05:24:51 +0000 | [diff] [blame] | 1811 | EXPORT_SYMBOL_GPL(regmap_fields_update_bits_base); |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1812 | |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1813 | /* |
| 1814 | * regmap_bulk_write(): Write multiple registers to the device |
| 1815 | * |
| 1816 | * @map: Register map to write to |
| 1817 | * @reg: First register to be write from |
| 1818 | * @val: Block of data to be written, in native register size for device |
| 1819 | * @val_count: Number of registers to write |
| 1820 | * |
| 1821 | * This function is intended to be used for writing a large block of |
Nestor Ovroy | 31b35e9e | 2013-01-18 16:51:03 +0100 | [diff] [blame] | 1822 | * data to the device either in single transfer or multiple transfer. |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1823 | * |
| 1824 | * A value of zero will be returned on success, a negative errno will |
| 1825 | * be returned in error cases. |
| 1826 | */ |
| 1827 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, |
| 1828 | size_t val_count) |
| 1829 | { |
| 1830 | int ret = 0, i; |
| 1831 | size_t val_bytes = map->format.val_bytes; |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1832 | size_t total_size = val_bytes * val_count; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1833 | |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 1834 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1835 | return -EINVAL; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1836 | |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1837 | /* |
| 1838 | * Some devices don't support bulk write, for |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1839 | * them we have a series of single write operations in the first two if |
| 1840 | * blocks. |
| 1841 | * |
| 1842 | * The first if block is used for memory mapped io. It does not allow |
| 1843 | * val_bytes of 3 for example. |
Chen-Yu Tsai | 5bf75b4 | 2016-06-20 10:52:11 +0800 | [diff] [blame] | 1844 | * The second one is for busses that do not provide raw I/O. |
| 1845 | * The third one is used for busses which do not have these limitations |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1846 | * and can write arbitrary value lengths. |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1847 | */ |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1848 | if (!map->bus) { |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1849 | map->lock(map->lock_arg); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1850 | for (i = 0; i < val_count; i++) { |
| 1851 | unsigned int ival; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1852 | |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1853 | switch (val_bytes) { |
| 1854 | case 1: |
| 1855 | ival = *(u8 *)(val + (i * val_bytes)); |
| 1856 | break; |
| 1857 | case 2: |
| 1858 | ival = *(u16 *)(val + (i * val_bytes)); |
| 1859 | break; |
| 1860 | case 4: |
| 1861 | ival = *(u32 *)(val + (i * val_bytes)); |
| 1862 | break; |
| 1863 | #ifdef CONFIG_64BIT |
| 1864 | case 8: |
| 1865 | ival = *(u64 *)(val + (i * val_bytes)); |
| 1866 | break; |
| 1867 | #endif |
| 1868 | default: |
| 1869 | ret = -EINVAL; |
| 1870 | goto out; |
| 1871 | } |
| 1872 | |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 1873 | ret = _regmap_write(map, |
| 1874 | reg + regmap_get_offset(map, i), |
| 1875 | ival); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1876 | if (ret != 0) |
| 1877 | goto out; |
| 1878 | } |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1879 | out: |
| 1880 | map->unlock(map->lock_arg); |
Chen-Yu Tsai | 5bf75b4 | 2016-06-20 10:52:11 +0800 | [diff] [blame] | 1881 | } else if (map->bus && !map->format.parse_inplace) { |
| 1882 | const u8 *u8 = val; |
| 1883 | const u16 *u16 = val; |
| 1884 | const u32 *u32 = val; |
| 1885 | unsigned int ival; |
| 1886 | |
| 1887 | for (i = 0; i < val_count; i++) { |
| 1888 | switch (map->format.val_bytes) { |
| 1889 | case 4: |
| 1890 | ival = u32[i]; |
| 1891 | break; |
| 1892 | case 2: |
| 1893 | ival = u16[i]; |
| 1894 | break; |
| 1895 | case 1: |
| 1896 | ival = u8[i]; |
| 1897 | break; |
| 1898 | default: |
| 1899 | return -EINVAL; |
| 1900 | } |
| 1901 | |
| 1902 | ret = regmap_write(map, reg + (i * map->reg_stride), |
| 1903 | ival); |
| 1904 | if (ret) |
| 1905 | return ret; |
| 1906 | } |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1907 | } else if (map->use_single_write || |
| 1908 | (map->max_raw_write && map->max_raw_write < total_size)) { |
| 1909 | int chunk_stride = map->reg_stride; |
| 1910 | size_t chunk_size = val_bytes; |
| 1911 | size_t chunk_count = val_count; |
| 1912 | |
| 1913 | if (!map->use_single_write) { |
| 1914 | chunk_size = map->max_raw_write; |
| 1915 | if (chunk_size % val_bytes) |
| 1916 | chunk_size -= chunk_size % val_bytes; |
| 1917 | chunk_count = total_size / chunk_size; |
| 1918 | chunk_stride *= chunk_size / val_bytes; |
| 1919 | } |
| 1920 | |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1921 | map->lock(map->lock_arg); |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1922 | /* Write as many bytes as possible with chunk_size */ |
| 1923 | for (i = 0; i < chunk_count; i++) { |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1924 | ret = _regmap_raw_write(map, |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1925 | reg + (i * chunk_stride), |
| 1926 | val + (i * chunk_size), |
| 1927 | chunk_size); |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1928 | if (ret) |
| 1929 | break; |
| 1930 | } |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1931 | |
| 1932 | /* Write remaining bytes */ |
| 1933 | if (!ret && chunk_size * i < total_size) { |
| 1934 | ret = _regmap_raw_write(map, reg + (i * chunk_stride), |
| 1935 | val + (i * chunk_size), |
| 1936 | total_size - i * chunk_size); |
| 1937 | } |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1938 | map->unlock(map->lock_arg); |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1939 | } else { |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1940 | void *wval; |
| 1941 | |
Xiubo Li | d6b41cb | 2014-09-28 17:09:54 +0800 | [diff] [blame] | 1942 | if (!val_count) |
| 1943 | return -EINVAL; |
| 1944 | |
Stephen Boyd | b4a21fc | 2015-09-11 16:37:05 -0700 | [diff] [blame] | 1945 | wval = kmemdup(val, val_count * val_bytes, map->alloc_flags); |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1946 | if (!wval) { |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1947 | dev_err(map->dev, "Error in memory allocation\n"); |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1948 | return -ENOMEM; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1949 | } |
| 1950 | for (i = 0; i < val_count * val_bytes; i += val_bytes) |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 1951 | map->format.parse_inplace(wval + i); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1952 | |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1953 | map->lock(map->lock_arg); |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1954 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1955 | map->unlock(map->lock_arg); |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1956 | |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1957 | kfree(wval); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1958 | } |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1959 | return ret; |
| 1960 | } |
| 1961 | EXPORT_SYMBOL_GPL(regmap_bulk_write); |
| 1962 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 1963 | /* |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1964 | * _regmap_raw_multi_reg_write() |
| 1965 | * |
| 1966 | * the (register,newvalue) pairs in regs have not been formatted, but |
| 1967 | * they are all in the same page and have been changed to being page |
Xiubo Li | b486afb | 2015-08-12 15:02:19 +0800 | [diff] [blame] | 1968 | * relative. The page register has been written if that was necessary. |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1969 | */ |
| 1970 | static int _regmap_raw_multi_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 1971 | const struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1972 | size_t num_regs) |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 1973 | { |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1974 | int ret; |
| 1975 | void *buf; |
| 1976 | int i; |
| 1977 | u8 *u8; |
| 1978 | size_t val_bytes = map->format.val_bytes; |
| 1979 | size_t reg_bytes = map->format.reg_bytes; |
| 1980 | size_t pad_bytes = map->format.pad_bytes; |
| 1981 | size_t pair_size = reg_bytes + pad_bytes + val_bytes; |
| 1982 | size_t len = pair_size * num_regs; |
| 1983 | |
Xiubo Li | f5727cd | 2014-04-30 17:31:08 +0800 | [diff] [blame] | 1984 | if (!len) |
| 1985 | return -EINVAL; |
| 1986 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1987 | buf = kzalloc(len, GFP_KERNEL); |
| 1988 | if (!buf) |
| 1989 | return -ENOMEM; |
| 1990 | |
| 1991 | /* We have to linearise by hand. */ |
| 1992 | |
| 1993 | u8 = buf; |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 1994 | |
| 1995 | for (i = 0; i < num_regs; i++) { |
Markus Pargmann | 2f9b660 | 2015-08-12 12:12:28 +0200 | [diff] [blame] | 1996 | unsigned int reg = regs[i].reg; |
| 1997 | unsigned int val = regs[i].def; |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1998 | trace_regmap_hw_write_start(map, reg, 1); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1999 | map->format.format_reg(u8, reg, map->reg_shift); |
| 2000 | u8 += reg_bytes + pad_bytes; |
| 2001 | map->format.format_val(u8, val, 0); |
| 2002 | u8 += val_bytes; |
| 2003 | } |
| 2004 | u8 = buf; |
| 2005 | *u8 |= map->write_flag_mask; |
| 2006 | |
| 2007 | ret = map->bus->write(map->bus_context, buf, len); |
| 2008 | |
| 2009 | kfree(buf); |
| 2010 | |
| 2011 | for (i = 0; i < num_regs; i++) { |
| 2012 | int reg = regs[i].reg; |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2013 | trace_regmap_hw_write_done(map, reg, 1); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2014 | } |
| 2015 | return ret; |
| 2016 | } |
| 2017 | |
| 2018 | static unsigned int _regmap_register_page(struct regmap *map, |
| 2019 | unsigned int reg, |
| 2020 | struct regmap_range_node *range) |
| 2021 | { |
| 2022 | unsigned int win_page = (reg - range->range_min) / range->window_len; |
| 2023 | |
| 2024 | return win_page; |
| 2025 | } |
| 2026 | |
| 2027 | static int _regmap_range_multi_paged_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2028 | struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2029 | size_t num_regs) |
| 2030 | { |
| 2031 | int ret; |
| 2032 | int i, n; |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2033 | struct reg_sequence *base; |
Geert Uytterhoeven | b48d139 | 2014-04-22 12:47:29 +0200 | [diff] [blame] | 2034 | unsigned int this_page = 0; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2035 | unsigned int page_change = 0; |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2036 | /* |
| 2037 | * the set of registers are not neccessarily in order, but |
| 2038 | * since the order of write must be preserved this algorithm |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2039 | * chops the set each time the page changes. This also applies |
| 2040 | * if there is a delay required at any point in the sequence. |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2041 | */ |
| 2042 | base = regs; |
| 2043 | for (i = 0, n = 0; i < num_regs; i++, n++) { |
| 2044 | unsigned int reg = regs[i].reg; |
| 2045 | struct regmap_range_node *range; |
| 2046 | |
| 2047 | range = _regmap_range_lookup(map, reg); |
| 2048 | if (range) { |
| 2049 | unsigned int win_page = _regmap_register_page(map, reg, |
| 2050 | range); |
| 2051 | |
| 2052 | if (i == 0) |
| 2053 | this_page = win_page; |
| 2054 | if (win_page != this_page) { |
| 2055 | this_page = win_page; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2056 | page_change = 1; |
| 2057 | } |
| 2058 | } |
| 2059 | |
| 2060 | /* If we have both a page change and a delay make sure to |
| 2061 | * write the regs and apply the delay before we change the |
| 2062 | * page. |
| 2063 | */ |
| 2064 | |
| 2065 | if (page_change || regs[i].delay_us) { |
| 2066 | |
| 2067 | /* For situations where the first write requires |
| 2068 | * a delay we need to make sure we don't call |
| 2069 | * raw_multi_reg_write with n=0 |
| 2070 | * This can't occur with page breaks as we |
| 2071 | * never write on the first iteration |
| 2072 | */ |
| 2073 | if (regs[i].delay_us && i == 0) |
| 2074 | n = 1; |
| 2075 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2076 | ret = _regmap_raw_multi_reg_write(map, base, n); |
| 2077 | if (ret != 0) |
| 2078 | return ret; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2079 | |
| 2080 | if (regs[i].delay_us) |
| 2081 | udelay(regs[i].delay_us); |
| 2082 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2083 | base += n; |
| 2084 | n = 0; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2085 | |
| 2086 | if (page_change) { |
| 2087 | ret = _regmap_select_page(map, |
| 2088 | &base[n].reg, |
| 2089 | range, 1); |
| 2090 | if (ret != 0) |
| 2091 | return ret; |
| 2092 | |
| 2093 | page_change = 0; |
| 2094 | } |
| 2095 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2096 | } |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2097 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2098 | } |
| 2099 | if (n > 0) |
| 2100 | return _regmap_raw_multi_reg_write(map, base, n); |
| 2101 | return 0; |
| 2102 | } |
| 2103 | |
| 2104 | static int _regmap_multi_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2105 | const struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2106 | size_t num_regs) |
| 2107 | { |
| 2108 | int i; |
| 2109 | int ret; |
| 2110 | |
| 2111 | if (!map->can_multi_write) { |
| 2112 | for (i = 0; i < num_regs; i++) { |
| 2113 | ret = _regmap_write(map, regs[i].reg, regs[i].def); |
| 2114 | if (ret != 0) |
| 2115 | return ret; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2116 | |
| 2117 | if (regs[i].delay_us) |
| 2118 | udelay(regs[i].delay_us); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2119 | } |
| 2120 | return 0; |
| 2121 | } |
| 2122 | |
| 2123 | if (!map->format.parse_inplace) |
| 2124 | return -EINVAL; |
| 2125 | |
| 2126 | if (map->writeable_reg) |
| 2127 | for (i = 0; i < num_regs; i++) { |
| 2128 | int reg = regs[i].reg; |
| 2129 | if (!map->writeable_reg(map->dev, reg)) |
| 2130 | return -EINVAL; |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 2131 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2132 | return -EINVAL; |
| 2133 | } |
| 2134 | |
| 2135 | if (!map->cache_bypass) { |
| 2136 | for (i = 0; i < num_regs; i++) { |
| 2137 | unsigned int val = regs[i].def; |
| 2138 | unsigned int reg = regs[i].reg; |
| 2139 | ret = regcache_write(map, reg, val); |
| 2140 | if (ret) { |
| 2141 | dev_err(map->dev, |
| 2142 | "Error in caching of register: %x ret: %d\n", |
| 2143 | reg, ret); |
| 2144 | return ret; |
| 2145 | } |
| 2146 | } |
| 2147 | if (map->cache_only) { |
| 2148 | map->cache_dirty = true; |
| 2149 | return 0; |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2150 | } |
| 2151 | } |
| 2152 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2153 | WARN_ON(!map->bus); |
| 2154 | |
| 2155 | for (i = 0; i < num_regs; i++) { |
| 2156 | unsigned int reg = regs[i].reg; |
| 2157 | struct regmap_range_node *range; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2158 | |
| 2159 | /* Coalesce all the writes between a page break or a delay |
| 2160 | * in a sequence |
| 2161 | */ |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2162 | range = _regmap_range_lookup(map, reg); |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2163 | if (range || regs[i].delay_us) { |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2164 | size_t len = sizeof(struct reg_sequence)*num_regs; |
| 2165 | struct reg_sequence *base = kmemdup(regs, len, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2166 | GFP_KERNEL); |
| 2167 | if (!base) |
| 2168 | return -ENOMEM; |
| 2169 | ret = _regmap_range_multi_paged_reg_write(map, base, |
| 2170 | num_regs); |
| 2171 | kfree(base); |
| 2172 | |
| 2173 | return ret; |
| 2174 | } |
| 2175 | } |
| 2176 | return _regmap_raw_multi_reg_write(map, regs, num_regs); |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2177 | } |
| 2178 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2179 | /* |
| 2180 | * regmap_multi_reg_write(): Write multiple registers to the device |
| 2181 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2182 | * where the set of register,value pairs are supplied in any order, |
| 2183 | * possibly not all in a single range. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2184 | * |
| 2185 | * @map: Register map to write to |
| 2186 | * @regs: Array of structures containing register,value to be written |
| 2187 | * @num_regs: Number of registers to write |
| 2188 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2189 | * The 'normal' block write mode will send ultimately send data on the |
| 2190 | * target bus as R,V1,V2,V3,..,Vn where successively higer registers are |
| 2191 | * addressed. However, this alternative block multi write mode will send |
| 2192 | * the data as R1,V1,R2,V2,..,Rn,Vn on the target bus. The target device |
| 2193 | * must of course support the mode. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2194 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2195 | * A value of zero will be returned on success, a negative errno will be |
| 2196 | * returned in error cases. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2197 | */ |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2198 | int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs, |
Charles Keepax | f7e2cec | 2014-02-25 13:45:49 +0000 | [diff] [blame] | 2199 | int num_regs) |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2200 | { |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2201 | int ret; |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2202 | |
| 2203 | map->lock(map->lock_arg); |
| 2204 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2205 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
| 2206 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2207 | map->unlock(map->lock_arg); |
| 2208 | |
| 2209 | return ret; |
| 2210 | } |
| 2211 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write); |
| 2212 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2213 | /* |
| 2214 | * regmap_multi_reg_write_bypassed(): Write multiple registers to the |
| 2215 | * device but not the cache |
| 2216 | * |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2217 | * where the set of register are supplied in any order |
| 2218 | * |
| 2219 | * @map: Register map to write to |
| 2220 | * @regs: Array of structures containing register,value to be written |
| 2221 | * @num_regs: Number of registers to write |
| 2222 | * |
| 2223 | * This function is intended to be used for writing a large block of data |
| 2224 | * atomically to the device in single transfer for those I2C client devices |
| 2225 | * that implement this alternative block write mode. |
| 2226 | * |
| 2227 | * A value of zero will be returned on success, a negative errno will |
| 2228 | * be returned in error cases. |
| 2229 | */ |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2230 | int regmap_multi_reg_write_bypassed(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2231 | const struct reg_sequence *regs, |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2232 | int num_regs) |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2233 | { |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2234 | int ret; |
| 2235 | bool bypass; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2236 | |
| 2237 | map->lock(map->lock_arg); |
| 2238 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2239 | bypass = map->cache_bypass; |
| 2240 | map->cache_bypass = true; |
| 2241 | |
| 2242 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
| 2243 | |
| 2244 | map->cache_bypass = bypass; |
| 2245 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 2246 | map->unlock(map->lock_arg); |
| 2247 | |
| 2248 | return ret; |
| 2249 | } |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2250 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write_bypassed); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2251 | |
| 2252 | /** |
| 2253 | * regmap_raw_write_async(): Write raw values to one or more registers |
| 2254 | * asynchronously |
| 2255 | * |
| 2256 | * @map: Register map to write to |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2257 | * @reg: Initial register to write to |
| 2258 | * @val: Block of data to be written, laid out for direct transmission to the |
| 2259 | * device. Must be valid until regmap_async_complete() is called. |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2260 | * @val_len: Length of data pointed to by val. |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2261 | * |
| 2262 | * This function is intended to be used for things like firmware |
| 2263 | * download where a large block of data needs to be transferred to the |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 2264 | * device. No formatting will be done on the data provided. |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2265 | * |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2266 | * If supported by the underlying bus the write will be scheduled |
| 2267 | * asynchronously, helping maximise I/O speed on higher speed buses |
| 2268 | * like SPI. regmap_async_complete() can be called to ensure that all |
| 2269 | * asynchrnous writes have been completed. |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 2270 | * |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2271 | * A value of zero will be returned on success, a negative errno will |
| 2272 | * be returned in error cases. |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2273 | */ |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 2274 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2275 | const void *val, size_t val_len) |
| 2276 | { |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 2277 | int ret; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2278 | |
| 2279 | if (val_len % map->format.val_bytes) |
| 2280 | return -EINVAL; |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 2281 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 2282 | return -EINVAL; |
| 2283 | |
| 2284 | map->lock(map->lock_arg); |
| 2285 | |
Lars-Peter Clausen | 1925441 | 2011-11-16 16:28:19 +0100 | [diff] [blame] | 2286 | map->async = true; |
| 2287 | |
| 2288 | ret = _regmap_raw_write(map, reg, val, val_len); |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 2289 | |
| 2290 | map->async = false; |
| 2291 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2292 | map->unlock(map->lock_arg); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 2293 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2294 | return ret; |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 2295 | } |
| 2296 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); |
| 2297 | |
| 2298 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
| 2299 | unsigned int val_len) |
| 2300 | { |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 2301 | struct regmap_range_node *range; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2302 | int ret; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2303 | |
| 2304 | WARN_ON(!map->bus); |
| 2305 | |
Mark Brown | bb2bb45 | 2016-02-01 21:09:14 +0000 | [diff] [blame] | 2306 | if (!map->bus || !map->bus->read) |
| 2307 | return -EINVAL; |
| 2308 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2309 | range = _regmap_range_lookup(map, reg); |
| 2310 | if (range) { |
| 2311 | ret = _regmap_select_page(map, ®, range, |
| 2312 | val_len / map->format.val_bytes); |
| 2313 | if (ret != 0) |
| 2314 | return ret; |
| 2315 | } |
| 2316 | |
| 2317 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
Tony Lindgren | f50e38c | 2016-09-15 13:56:10 -0700 | [diff] [blame] | 2318 | regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, |
| 2319 | map->read_flag_mask); |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2320 | trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2321 | |
| 2322 | ret = map->bus->read(map->bus_context, map->work_buf, |
| 2323 | map->format.reg_bytes + map->format.pad_bytes, |
| 2324 | val, val_len); |
| 2325 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2326 | trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2327 | |
| 2328 | return ret; |
| 2329 | } |
| 2330 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 2331 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
| 2332 | unsigned int *val) |
| 2333 | { |
| 2334 | struct regmap *map = context; |
| 2335 | |
| 2336 | return map->bus->reg_read(map->bus_context, reg, val); |
| 2337 | } |
| 2338 | |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 2339 | static int _regmap_bus_read(void *context, unsigned int reg, |
| 2340 | unsigned int *val) |
| 2341 | { |
| 2342 | int ret; |
| 2343 | struct regmap *map = context; |
| 2344 | |
| 2345 | if (!map->format.parse_val) |
| 2346 | return -EINVAL; |
| 2347 | |
| 2348 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); |
| 2349 | if (ret == 0) |
| 2350 | *val = map->format.parse_val(map->work_buf); |
| 2351 | |
| 2352 | return ret; |
| 2353 | } |
| 2354 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2355 | static int _regmap_read(struct regmap *map, unsigned int reg, |
| 2356 | unsigned int *val) |
| 2357 | { |
| 2358 | int ret; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2359 | void *context = _regmap_map_get_context(map); |
| 2360 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2361 | if (!map->cache_bypass) { |
| 2362 | ret = regcache_read(map, reg, val); |
| 2363 | if (ret == 0) |
| 2364 | return 0; |
| 2365 | } |
| 2366 | |
| 2367 | if (map->cache_only) |
| 2368 | return -EBUSY; |
| 2369 | |
Michal Simek | d4807ad | 2014-02-10 12:59:46 +0100 | [diff] [blame] | 2370 | if (!regmap_readable(map, reg)) |
| 2371 | return -EIO; |
| 2372 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2373 | ret = map->reg_read(context, reg, val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2374 | if (ret == 0) { |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2375 | #ifdef LOG_DEVICE |
Pankaj Dubey | 5336be8 | 2014-09-27 09:47:55 +0530 | [diff] [blame] | 2376 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2377 | dev_info(map->dev, "%x => %x\n", reg, *val); |
| 2378 | #endif |
| 2379 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2380 | trace_regmap_reg_read(map, reg, *val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2381 | |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 2382 | if (!map->cache_bypass) |
| 2383 | regcache_write(map, reg, *val); |
| 2384 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2385 | |
| 2386 | return ret; |
| 2387 | } |
| 2388 | |
| 2389 | /** |
| 2390 | * regmap_read(): Read a value from a single register |
| 2391 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2392 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2393 | * @reg: Register to be read from |
| 2394 | * @val: Pointer to store read value |
| 2395 | * |
| 2396 | * A value of zero will be returned on success, a negative errno will |
| 2397 | * be returned in error cases. |
| 2398 | */ |
| 2399 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) |
| 2400 | { |
| 2401 | int ret; |
| 2402 | |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 2403 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2404 | return -EINVAL; |
| 2405 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2406 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2407 | |
| 2408 | ret = _regmap_read(map, reg, val); |
| 2409 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2410 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2411 | |
| 2412 | return ret; |
| 2413 | } |
| 2414 | EXPORT_SYMBOL_GPL(regmap_read); |
| 2415 | |
| 2416 | /** |
| 2417 | * regmap_raw_read(): Read raw data from the device |
| 2418 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2419 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2420 | * @reg: First register to be read from |
| 2421 | * @val: Pointer to store read value |
| 2422 | * @val_len: Size of data to read |
| 2423 | * |
| 2424 | * A value of zero will be returned on success, a negative errno will |
| 2425 | * be returned in error cases. |
| 2426 | */ |
| 2427 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
| 2428 | size_t val_len) |
| 2429 | { |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2430 | size_t val_bytes = map->format.val_bytes; |
| 2431 | size_t val_count = val_len / val_bytes; |
| 2432 | unsigned int v; |
| 2433 | int ret, i; |
Mark Brown | 04e016a | 2011-10-09 13:35:43 +0100 | [diff] [blame] | 2434 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2435 | if (!map->bus) |
| 2436 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 2437 | if (val_len % map->format.val_bytes) |
| 2438 | return -EINVAL; |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 2439 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2440 | return -EINVAL; |
Mark Brown | fa3eec7 | 2015-07-01 23:51:43 +0100 | [diff] [blame] | 2441 | if (val_count == 0) |
| 2442 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 2443 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2444 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2445 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2446 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
| 2447 | map->cache_type == REGCACHE_NONE) { |
Markus Pargmann | 9a16ea9 | 2015-08-20 11:12:35 +0200 | [diff] [blame] | 2448 | if (!map->bus->read) { |
| 2449 | ret = -ENOTSUPP; |
| 2450 | goto out; |
| 2451 | } |
Markus Pargmann | c335931 | 2015-08-30 09:33:55 +0200 | [diff] [blame] | 2452 | if (map->max_raw_read && map->max_raw_read < val_len) { |
| 2453 | ret = -E2BIG; |
| 2454 | goto out; |
| 2455 | } |
Markus Pargmann | 9a16ea9 | 2015-08-20 11:12:35 +0200 | [diff] [blame] | 2456 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2457 | /* Physical block read if there's no cache involved */ |
| 2458 | ret = _regmap_raw_read(map, reg, val, val_len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2459 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2460 | } else { |
| 2461 | /* Otherwise go word by word for the cache; should be low |
| 2462 | * cost as we expect to hit the cache. |
| 2463 | */ |
| 2464 | for (i = 0; i < val_count; i++) { |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 2465 | ret = _regmap_read(map, reg + regmap_get_offset(map, i), |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2466 | &v); |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2467 | if (ret != 0) |
| 2468 | goto out; |
| 2469 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 2470 | map->format.format_val(val + (i * val_bytes), v, 0); |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2471 | } |
| 2472 | } |
| 2473 | |
| 2474 | out: |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2475 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2476 | |
| 2477 | return ret; |
| 2478 | } |
| 2479 | EXPORT_SYMBOL_GPL(regmap_raw_read); |
| 2480 | |
| 2481 | /** |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 2482 | * regmap_field_read(): Read a value to a single register field |
| 2483 | * |
| 2484 | * @field: Register field to read from |
| 2485 | * @val: Pointer to store read value |
| 2486 | * |
| 2487 | * A value of zero will be returned on success, a negative errno will |
| 2488 | * be returned in error cases. |
| 2489 | */ |
| 2490 | int regmap_field_read(struct regmap_field *field, unsigned int *val) |
| 2491 | { |
| 2492 | int ret; |
| 2493 | unsigned int reg_val; |
| 2494 | ret = regmap_read(field->regmap, field->reg, ®_val); |
| 2495 | if (ret != 0) |
| 2496 | return ret; |
| 2497 | |
| 2498 | reg_val &= field->mask; |
| 2499 | reg_val >>= field->shift; |
| 2500 | *val = reg_val; |
| 2501 | |
| 2502 | return ret; |
| 2503 | } |
| 2504 | EXPORT_SYMBOL_GPL(regmap_field_read); |
| 2505 | |
| 2506 | /** |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 2507 | * regmap_fields_read(): Read a value to a single register field with port ID |
| 2508 | * |
| 2509 | * @field: Register field to read from |
| 2510 | * @id: port ID |
| 2511 | * @val: Pointer to store read value |
| 2512 | * |
| 2513 | * A value of zero will be returned on success, a negative errno will |
| 2514 | * be returned in error cases. |
| 2515 | */ |
| 2516 | int regmap_fields_read(struct regmap_field *field, unsigned int id, |
| 2517 | unsigned int *val) |
| 2518 | { |
| 2519 | int ret; |
| 2520 | unsigned int reg_val; |
| 2521 | |
| 2522 | if (id >= field->id_size) |
| 2523 | return -EINVAL; |
| 2524 | |
| 2525 | ret = regmap_read(field->regmap, |
| 2526 | field->reg + (field->id_offset * id), |
| 2527 | ®_val); |
| 2528 | if (ret != 0) |
| 2529 | return ret; |
| 2530 | |
| 2531 | reg_val &= field->mask; |
| 2532 | reg_val >>= field->shift; |
| 2533 | *val = reg_val; |
| 2534 | |
| 2535 | return ret; |
| 2536 | } |
| 2537 | EXPORT_SYMBOL_GPL(regmap_fields_read); |
| 2538 | |
| 2539 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2540 | * regmap_bulk_read(): Read multiple registers from the device |
| 2541 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2542 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2543 | * @reg: First register to be read from |
| 2544 | * @val: Pointer to store read value, in native register size for device |
| 2545 | * @val_count: Number of registers to read |
| 2546 | * |
| 2547 | * A value of zero will be returned on success, a negative errno will |
| 2548 | * be returned in error cases. |
| 2549 | */ |
| 2550 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, |
| 2551 | size_t val_count) |
| 2552 | { |
| 2553 | int ret, i; |
| 2554 | size_t val_bytes = map->format.val_bytes; |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 2555 | bool vol = regmap_volatile_range(map, reg, val_count); |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 2556 | |
Xiubo Li | fcac023 | 2015-12-16 17:45:32 +0800 | [diff] [blame] | 2557 | if (!IS_ALIGNED(reg, map->reg_stride)) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2558 | return -EINVAL; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2559 | |
Stephen Boyd | 3b58ee1 | 2013-12-13 09:14:07 -0800 | [diff] [blame] | 2560 | if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) { |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2561 | /* |
| 2562 | * Some devices does not support bulk read, for |
| 2563 | * them we have a series of single read operations. |
| 2564 | */ |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 2565 | size_t total_size = val_bytes * val_count; |
| 2566 | |
| 2567 | if (!map->use_single_read && |
| 2568 | (!map->max_raw_read || map->max_raw_read > total_size)) { |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2569 | ret = regmap_raw_read(map, reg, val, |
| 2570 | val_bytes * val_count); |
| 2571 | if (ret != 0) |
| 2572 | return ret; |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 2573 | } else { |
| 2574 | /* |
| 2575 | * Some devices do not support bulk read or do not |
| 2576 | * support large bulk reads, for them we have a series |
| 2577 | * of read operations. |
| 2578 | */ |
| 2579 | int chunk_stride = map->reg_stride; |
| 2580 | size_t chunk_size = val_bytes; |
| 2581 | size_t chunk_count = val_count; |
| 2582 | |
| 2583 | if (!map->use_single_read) { |
| 2584 | chunk_size = map->max_raw_read; |
| 2585 | if (chunk_size % val_bytes) |
| 2586 | chunk_size -= chunk_size % val_bytes; |
| 2587 | chunk_count = total_size / chunk_size; |
| 2588 | chunk_stride *= chunk_size / val_bytes; |
| 2589 | } |
| 2590 | |
| 2591 | /* Read bytes that fit into a multiple of chunk_size */ |
| 2592 | for (i = 0; i < chunk_count; i++) { |
| 2593 | ret = regmap_raw_read(map, |
| 2594 | reg + (i * chunk_stride), |
| 2595 | val + (i * chunk_size), |
| 2596 | chunk_size); |
| 2597 | if (ret != 0) |
| 2598 | return ret; |
| 2599 | } |
| 2600 | |
| 2601 | /* Read remaining bytes */ |
| 2602 | if (chunk_size * i < total_size) { |
| 2603 | ret = regmap_raw_read(map, |
| 2604 | reg + (i * chunk_stride), |
| 2605 | val + (i * chunk_size), |
| 2606 | total_size - i * chunk_size); |
| 2607 | if (ret != 0) |
| 2608 | return ret; |
| 2609 | } |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2610 | } |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2611 | |
| 2612 | for (i = 0; i < val_count * val_bytes; i += val_bytes) |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 2613 | map->format.parse_inplace(val + i); |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2614 | } else { |
| 2615 | for (i = 0; i < val_count; i++) { |
Laxman Dewangan | 6560ffd | 2012-05-09 17:43:12 +0530 | [diff] [blame] | 2616 | unsigned int ival; |
Xiubo Li | ca747be | 2016-01-04 18:00:33 +0800 | [diff] [blame] | 2617 | ret = regmap_read(map, reg + regmap_get_offset(map, i), |
Mark Brown | 25061d2 | 2012-05-12 13:06:08 +0100 | [diff] [blame] | 2618 | &ival); |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2619 | if (ret != 0) |
| 2620 | return ret; |
Mark Brown | d5b98eb | 2015-08-28 20:04:53 +0100 | [diff] [blame] | 2621 | |
| 2622 | if (map->format.format_val) { |
| 2623 | map->format.format_val(val + (i * val_bytes), ival, 0); |
| 2624 | } else { |
| 2625 | /* Devices providing read and write |
| 2626 | * operations can use the bulk I/O |
| 2627 | * functions if they define a val_bytes, |
| 2628 | * we assume that the values are native |
| 2629 | * endian. |
| 2630 | */ |
Xiubo Li | 19c0478 | 2015-12-09 17:11:53 +0800 | [diff] [blame] | 2631 | #ifdef CONFIG_64BIT |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 2632 | u64 *u64 = val; |
Xiubo Li | 19c0478 | 2015-12-09 17:11:53 +0800 | [diff] [blame] | 2633 | #endif |
Mark Brown | d5b98eb | 2015-08-28 20:04:53 +0100 | [diff] [blame] | 2634 | u32 *u32 = val; |
| 2635 | u16 *u16 = val; |
| 2636 | u8 *u8 = val; |
| 2637 | |
| 2638 | switch (map->format.val_bytes) { |
Xiubo Li | afcc00b | 2015-12-03 17:31:52 +0800 | [diff] [blame] | 2639 | #ifdef CONFIG_64BIT |
| 2640 | case 8: |
| 2641 | u64[i] = ival; |
| 2642 | break; |
| 2643 | #endif |
Mark Brown | d5b98eb | 2015-08-28 20:04:53 +0100 | [diff] [blame] | 2644 | case 4: |
| 2645 | u32[i] = ival; |
| 2646 | break; |
| 2647 | case 2: |
| 2648 | u16[i] = ival; |
| 2649 | break; |
| 2650 | case 1: |
| 2651 | u8[i] = ival; |
| 2652 | break; |
| 2653 | default: |
| 2654 | return -EINVAL; |
| 2655 | } |
| 2656 | } |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2657 | } |
| 2658 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2659 | |
| 2660 | return 0; |
| 2661 | } |
| 2662 | EXPORT_SYMBOL_GPL(regmap_bulk_read); |
| 2663 | |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2664 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
| 2665 | unsigned int mask, unsigned int val, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2666 | bool *change, bool force_write) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2667 | { |
| 2668 | int ret; |
Mark Brown | d91e8db | 2011-11-18 16:03:50 +0000 | [diff] [blame] | 2669 | unsigned int tmp, orig; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2670 | |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame] | 2671 | if (change) |
| 2672 | *change = false; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2673 | |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame] | 2674 | if (regmap_volatile(map, reg) && map->reg_update_bits) { |
| 2675 | ret = map->reg_update_bits(map->bus_context, reg, mask, val); |
| 2676 | if (ret == 0 && change) |
Xiubo Li | e2f74dc | 2014-02-20 08:50:10 +0800 | [diff] [blame] | 2677 | *change = true; |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2678 | } else { |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame] | 2679 | ret = _regmap_read(map, reg, &orig); |
| 2680 | if (ret != 0) |
| 2681 | return ret; |
| 2682 | |
| 2683 | tmp = orig & ~mask; |
| 2684 | tmp |= val & mask; |
| 2685 | |
| 2686 | if (force_write || (tmp != orig)) { |
| 2687 | ret = _regmap_write(map, reg, tmp); |
| 2688 | if (ret == 0 && change) |
| 2689 | *change = true; |
| 2690 | } |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2691 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2692 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2693 | return ret; |
| 2694 | } |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2695 | |
| 2696 | /** |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2697 | * regmap_update_bits_base: |
| 2698 | * Perform a read/modify/write cycle on the |
| 2699 | * register map with change, async, force option |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2700 | * |
| 2701 | * @map: Register map to update |
| 2702 | * @reg: Register to update |
| 2703 | * @mask: Bitmask to change |
| 2704 | * @val: New value for bitmask |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2705 | * @change: Boolean indicating if a write was done |
| 2706 | * @async: Boolean indicating asynchronously |
| 2707 | * @force: Boolean indicating use force update |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2708 | * |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2709 | * if async was true, |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2710 | * With most buses the read must be done synchronously so this is most |
| 2711 | * useful for devices with a cache which do not need to interact with |
| 2712 | * the hardware to determine the current register value. |
| 2713 | * |
| 2714 | * Returns zero for success, a negative number on error. |
| 2715 | */ |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2716 | int regmap_update_bits_base(struct regmap *map, unsigned int reg, |
| 2717 | unsigned int mask, unsigned int val, |
| 2718 | bool *change, bool async, bool force) |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2719 | { |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2720 | int ret; |
| 2721 | |
| 2722 | map->lock(map->lock_arg); |
| 2723 | |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2724 | map->async = async; |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2725 | |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2726 | ret = _regmap_update_bits(map, reg, mask, val, change, force); |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2727 | |
| 2728 | map->async = false; |
| 2729 | |
| 2730 | map->unlock(map->lock_arg); |
| 2731 | |
| 2732 | return ret; |
| 2733 | } |
Kuninori Morimoto | 91d31b9 | 2016-02-15 05:22:18 +0000 | [diff] [blame] | 2734 | EXPORT_SYMBOL_GPL(regmap_update_bits_base); |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2735 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2736 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
| 2737 | { |
| 2738 | struct regmap *map = async->map; |
| 2739 | bool wake; |
| 2740 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2741 | trace_regmap_async_io_complete(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2742 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2743 | spin_lock(&map->async_lock); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 2744 | list_move(&async->list, &map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2745 | wake = list_empty(&map->async_list); |
| 2746 | |
| 2747 | if (ret != 0) |
| 2748 | map->async_ret = ret; |
| 2749 | |
| 2750 | spin_unlock(&map->async_lock); |
| 2751 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2752 | if (wake) |
| 2753 | wake_up(&map->async_waitq); |
| 2754 | } |
Axel Lin | f804fb5 | 2013-02-03 00:14:13 +0800 | [diff] [blame] | 2755 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2756 | |
| 2757 | static int regmap_async_is_done(struct regmap *map) |
| 2758 | { |
| 2759 | unsigned long flags; |
| 2760 | int ret; |
| 2761 | |
| 2762 | spin_lock_irqsave(&map->async_lock, flags); |
| 2763 | ret = list_empty(&map->async_list); |
| 2764 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 2765 | |
| 2766 | return ret; |
| 2767 | } |
| 2768 | |
| 2769 | /** |
| 2770 | * regmap_async_complete: Ensure all asynchronous I/O has completed. |
| 2771 | * |
| 2772 | * @map: Map to operate on. |
| 2773 | * |
| 2774 | * Blocks until any pending asynchronous I/O has completed. Returns |
| 2775 | * an error code for any failed I/O operations. |
| 2776 | */ |
| 2777 | int regmap_async_complete(struct regmap *map) |
| 2778 | { |
| 2779 | unsigned long flags; |
| 2780 | int ret; |
| 2781 | |
| 2782 | /* Nothing to do with no async support */ |
Daniel Mack | f2e055e | 2013-07-04 13:11:03 +0200 | [diff] [blame] | 2783 | if (!map->bus || !map->bus->async_write) |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2784 | return 0; |
| 2785 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2786 | trace_regmap_async_complete_start(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2787 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2788 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
| 2789 | |
| 2790 | spin_lock_irqsave(&map->async_lock, flags); |
| 2791 | ret = map->async_ret; |
| 2792 | map->async_ret = 0; |
| 2793 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 2794 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2795 | trace_regmap_async_complete_done(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2796 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2797 | return ret; |
| 2798 | } |
Mark Brown | f88948e | 2013-02-05 13:53:26 +0000 | [diff] [blame] | 2799 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2800 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2801 | /** |
| 2802 | * regmap_register_patch: Register and apply register updates to be applied |
| 2803 | * on device initialistion |
| 2804 | * |
| 2805 | * @map: Register map to apply updates to. |
| 2806 | * @regs: Values to update. |
| 2807 | * @num_regs: Number of entries in regs. |
| 2808 | * |
| 2809 | * Register a set of register updates to be applied to the device |
| 2810 | * whenever the device registers are synchronised with the cache and |
| 2811 | * apply them immediately. Typically this is used to apply |
| 2812 | * corrections to be applied to the device defaults on startup, such |
| 2813 | * as the updates some vendors provide to undocumented registers. |
Mark Brown | 56fb1c7 | 2014-03-18 10:53:26 +0000 | [diff] [blame] | 2814 | * |
| 2815 | * The caller must ensure that this function cannot be called |
| 2816 | * concurrently with either itself or regcache_sync(). |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2817 | */ |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2818 | int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs, |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2819 | int num_regs) |
| 2820 | { |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2821 | struct reg_sequence *p; |
Charles Keepax | 6bf1310 | 2014-02-25 13:45:51 +0000 | [diff] [blame] | 2822 | int ret; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2823 | bool bypass; |
| 2824 | |
Cai Zhiyong | bd60e38 | 2013-11-18 20:21:49 +0800 | [diff] [blame] | 2825 | if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n", |
| 2826 | num_regs)) |
| 2827 | return 0; |
| 2828 | |
Mark Brown | aab13eb | 2013-07-11 12:41:44 +0100 | [diff] [blame] | 2829 | p = krealloc(map->patch, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2830 | sizeof(struct reg_sequence) * (map->patch_regs + num_regs), |
Mark Brown | aab13eb | 2013-07-11 12:41:44 +0100 | [diff] [blame] | 2831 | GFP_KERNEL); |
| 2832 | if (p) { |
| 2833 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); |
| 2834 | map->patch = p; |
| 2835 | map->patch_regs += num_regs; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2836 | } else { |
Mark Brown | 56fb1c7 | 2014-03-18 10:53:26 +0000 | [diff] [blame] | 2837 | return -ENOMEM; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2838 | } |
| 2839 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2840 | map->lock(map->lock_arg); |
| 2841 | |
| 2842 | bypass = map->cache_bypass; |
| 2843 | |
| 2844 | map->cache_bypass = true; |
| 2845 | map->async = true; |
| 2846 | |
Charles Keepax | 6bf1310 | 2014-02-25 13:45:51 +0000 | [diff] [blame] | 2847 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2848 | |
Mark Brown | 1a25f26 | 2013-10-10 20:55:03 +0100 | [diff] [blame] | 2849 | map->async = false; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2850 | map->cache_bypass = bypass; |
| 2851 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2852 | map->unlock(map->lock_arg); |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2853 | |
Mark Brown | 1a25f26 | 2013-10-10 20:55:03 +0100 | [diff] [blame] | 2854 | regmap_async_complete(map); |
| 2855 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2856 | return ret; |
| 2857 | } |
| 2858 | EXPORT_SYMBOL_GPL(regmap_register_patch); |
| 2859 | |
Mark Brown | eae4b51 | 2012-03-14 13:15:03 +0000 | [diff] [blame] | 2860 | /* |
Mark Brown | a6539c3 | 2012-02-17 14:20:14 -0800 | [diff] [blame] | 2861 | * regmap_get_val_bytes(): Report the size of a register value |
| 2862 | * |
| 2863 | * Report the size of a register value, mainly intended to for use by |
| 2864 | * generic infrastructure built on top of regmap. |
| 2865 | */ |
| 2866 | int regmap_get_val_bytes(struct regmap *map) |
| 2867 | { |
| 2868 | if (map->format.format_write) |
| 2869 | return -EINVAL; |
| 2870 | |
| 2871 | return map->format.val_bytes; |
| 2872 | } |
| 2873 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); |
| 2874 | |
Srinivas Kandagatla | 668abc7 | 2015-05-21 17:42:43 +0100 | [diff] [blame] | 2875 | /** |
| 2876 | * regmap_get_max_register(): Report the max register value |
| 2877 | * |
| 2878 | * Report the max register value, mainly intended to for use by |
| 2879 | * generic infrastructure built on top of regmap. |
| 2880 | */ |
| 2881 | int regmap_get_max_register(struct regmap *map) |
| 2882 | { |
| 2883 | return map->max_register ? map->max_register : -EINVAL; |
| 2884 | } |
| 2885 | EXPORT_SYMBOL_GPL(regmap_get_max_register); |
| 2886 | |
Srinivas Kandagatla | a2f776c | 2015-05-21 17:42:54 +0100 | [diff] [blame] | 2887 | /** |
| 2888 | * regmap_get_reg_stride(): Report the register address stride |
| 2889 | * |
| 2890 | * Report the register address stride, mainly intended to for use by |
| 2891 | * generic infrastructure built on top of regmap. |
| 2892 | */ |
| 2893 | int regmap_get_reg_stride(struct regmap *map) |
| 2894 | { |
| 2895 | return map->reg_stride; |
| 2896 | } |
| 2897 | EXPORT_SYMBOL_GPL(regmap_get_reg_stride); |
| 2898 | |
Nenghua Cao | 13ff50c | 2014-02-19 18:44:13 +0800 | [diff] [blame] | 2899 | int regmap_parse_val(struct regmap *map, const void *buf, |
| 2900 | unsigned int *val) |
| 2901 | { |
| 2902 | if (!map->format.parse_val) |
| 2903 | return -EINVAL; |
| 2904 | |
| 2905 | *val = map->format.parse_val(buf); |
| 2906 | |
| 2907 | return 0; |
| 2908 | } |
| 2909 | EXPORT_SYMBOL_GPL(regmap_parse_val); |
| 2910 | |
Mark Brown | 31244e3 | 2011-07-20 22:56:53 +0100 | [diff] [blame] | 2911 | static int __init regmap_initcall(void) |
| 2912 | { |
| 2913 | regmap_debugfs_initcall(); |
| 2914 | |
| 2915 | return 0; |
| 2916 | } |
| 2917 | postcore_initcall(regmap_initcall); |