Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 1 | /* |
| 2 | * soc-cache.c -- ASoC register cache helpers |
| 3 | * |
| 4 | * Copyright 2009 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 it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | */ |
| 13 | |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 14 | #include <linux/i2c.h> |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 15 | #include <linux/spi/spi.h> |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 16 | #include <sound/soc.h> |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame^] | 17 | #include <linux/lzo.h> |
| 18 | #include <linux/bitmap.h> |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 19 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 20 | static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec, |
| 21 | unsigned int reg) |
| 22 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 23 | int ret; |
| 24 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 25 | |
| 26 | if (reg >= codec->driver->reg_cache_size || |
| 27 | snd_soc_codec_volatile_register(codec, reg)) { |
| 28 | if (codec->cache_only) |
| 29 | return -1; |
| 30 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 31 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 32 | return codec->hw_read(codec, reg); |
| 33 | } |
| 34 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 35 | ret = snd_soc_cache_read(codec, reg, &val); |
| 36 | if (ret < 0) |
| 37 | return -1; |
| 38 | return val; |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 39 | } |
| 40 | |
| 41 | static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg, |
| 42 | unsigned int value) |
| 43 | { |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 44 | u8 data[2]; |
| 45 | int ret; |
| 46 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 47 | data[0] = (reg << 4) | ((value >> 8) & 0x000f); |
| 48 | data[1] = value & 0x00ff; |
| 49 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 50 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 51 | reg < codec->driver->reg_cache_size) { |
| 52 | ret = snd_soc_cache_write(codec, reg, value); |
| 53 | if (ret < 0) |
| 54 | return -1; |
| 55 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 56 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 57 | if (codec->cache_only) { |
| 58 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 59 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 60 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 61 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 62 | ret = codec->hw_write(codec->control_data, data, 2); |
| 63 | if (ret == 2) |
| 64 | return 0; |
| 65 | if (ret < 0) |
| 66 | return ret; |
| 67 | else |
| 68 | return -EIO; |
| 69 | } |
| 70 | |
| 71 | #if defined(CONFIG_SPI_MASTER) |
| 72 | static int snd_soc_4_12_spi_write(void *control_data, const char *data, |
| 73 | int len) |
| 74 | { |
| 75 | struct spi_device *spi = control_data; |
| 76 | struct spi_transfer t; |
| 77 | struct spi_message m; |
| 78 | u8 msg[2]; |
| 79 | |
| 80 | if (len <= 0) |
| 81 | return 0; |
| 82 | |
| 83 | msg[0] = data[1]; |
| 84 | msg[1] = data[0]; |
| 85 | |
| 86 | spi_message_init(&m); |
| 87 | memset(&t, 0, (sizeof t)); |
| 88 | |
| 89 | t.tx_buf = &msg[0]; |
| 90 | t.len = len; |
| 91 | |
| 92 | spi_message_add_tail(&t, &m); |
| 93 | spi_sync(spi, &m); |
| 94 | |
| 95 | return len; |
| 96 | } |
| 97 | #else |
| 98 | #define snd_soc_4_12_spi_write NULL |
| 99 | #endif |
| 100 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 101 | static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec, |
| 102 | unsigned int reg) |
| 103 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 104 | int ret; |
| 105 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 106 | |
| 107 | if (reg >= codec->driver->reg_cache_size || |
| 108 | snd_soc_codec_volatile_register(codec, reg)) { |
| 109 | if (codec->cache_only) |
| 110 | return -1; |
| 111 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 112 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 113 | return codec->hw_read(codec, reg); |
| 114 | } |
| 115 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 116 | ret = snd_soc_cache_read(codec, reg, &val); |
| 117 | if (ret < 0) |
| 118 | return -1; |
| 119 | return val; |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, |
| 123 | unsigned int value) |
| 124 | { |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 125 | u8 data[2]; |
| 126 | int ret; |
| 127 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 128 | data[0] = (reg << 1) | ((value >> 8) & 0x0001); |
| 129 | data[1] = value & 0x00ff; |
| 130 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 131 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 132 | reg < codec->driver->reg_cache_size) { |
| 133 | ret = snd_soc_cache_write(codec, reg, value); |
| 134 | if (ret < 0) |
| 135 | return -1; |
| 136 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 137 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 138 | if (codec->cache_only) { |
| 139 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 140 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 141 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 142 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 143 | ret = codec->hw_write(codec->control_data, data, 2); |
| 144 | if (ret == 2) |
| 145 | return 0; |
| 146 | if (ret < 0) |
| 147 | return ret; |
| 148 | else |
| 149 | return -EIO; |
| 150 | } |
| 151 | |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 152 | #if defined(CONFIG_SPI_MASTER) |
| 153 | static int snd_soc_7_9_spi_write(void *control_data, const char *data, |
| 154 | int len) |
| 155 | { |
| 156 | struct spi_device *spi = control_data; |
| 157 | struct spi_transfer t; |
| 158 | struct spi_message m; |
| 159 | u8 msg[2]; |
| 160 | |
| 161 | if (len <= 0) |
| 162 | return 0; |
| 163 | |
| 164 | msg[0] = data[0]; |
| 165 | msg[1] = data[1]; |
| 166 | |
| 167 | spi_message_init(&m); |
| 168 | memset(&t, 0, (sizeof t)); |
| 169 | |
| 170 | t.tx_buf = &msg[0]; |
| 171 | t.len = len; |
| 172 | |
| 173 | spi_message_add_tail(&t, &m); |
| 174 | spi_sync(spi, &m); |
| 175 | |
| 176 | return len; |
| 177 | } |
| 178 | #else |
| 179 | #define snd_soc_7_9_spi_write NULL |
| 180 | #endif |
| 181 | |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 182 | static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg, |
| 183 | unsigned int value) |
| 184 | { |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 185 | u8 data[2]; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 186 | int ret; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 187 | |
Barry Song | f4bee1b | 2010-03-18 16:17:01 +0800 | [diff] [blame] | 188 | reg &= 0xff; |
| 189 | data[0] = reg; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 190 | data[1] = value & 0xff; |
| 191 | |
Dimitris Papastamos | 005d65f | 2010-09-22 16:16:06 +0100 | [diff] [blame] | 192 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 193 | reg < codec->driver->reg_cache_size) { |
| 194 | ret = snd_soc_cache_write(codec, reg, value); |
| 195 | if (ret < 0) |
| 196 | return -1; |
| 197 | } |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 198 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 199 | if (codec->cache_only) { |
| 200 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 201 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 202 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 203 | |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 204 | if (codec->hw_write(codec->control_data, data, 2) == 2) |
| 205 | return 0; |
| 206 | else |
| 207 | return -EIO; |
| 208 | } |
| 209 | |
| 210 | static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec, |
| 211 | unsigned int reg) |
| 212 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 213 | int ret; |
| 214 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 215 | |
Barry Song | f4bee1b | 2010-03-18 16:17:01 +0800 | [diff] [blame] | 216 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 217 | if (reg >= codec->driver->reg_cache_size || |
| 218 | snd_soc_codec_volatile_register(codec, reg)) { |
| 219 | if (codec->cache_only) |
| 220 | return -1; |
| 221 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 222 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 223 | return codec->hw_read(codec, reg); |
| 224 | } |
| 225 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 226 | ret = snd_soc_cache_read(codec, reg, &val); |
| 227 | if (ret < 0) |
| 228 | return -1; |
| 229 | return val; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 230 | } |
| 231 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 232 | #if defined(CONFIG_SPI_MASTER) |
| 233 | static int snd_soc_8_8_spi_write(void *control_data, const char *data, |
| 234 | int len) |
| 235 | { |
| 236 | struct spi_device *spi = control_data; |
| 237 | struct spi_transfer t; |
| 238 | struct spi_message m; |
| 239 | u8 msg[2]; |
| 240 | |
| 241 | if (len <= 0) |
| 242 | return 0; |
| 243 | |
| 244 | msg[0] = data[0]; |
| 245 | msg[1] = data[1]; |
| 246 | |
| 247 | spi_message_init(&m); |
| 248 | memset(&t, 0, (sizeof t)); |
| 249 | |
| 250 | t.tx_buf = &msg[0]; |
| 251 | t.len = len; |
| 252 | |
| 253 | spi_message_add_tail(&t, &m); |
| 254 | spi_sync(spi, &m); |
| 255 | |
| 256 | return len; |
| 257 | } |
| 258 | #else |
| 259 | #define snd_soc_8_8_spi_write NULL |
| 260 | #endif |
| 261 | |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 262 | static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, |
| 263 | unsigned int value) |
| 264 | { |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 265 | u8 data[3]; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 266 | int ret; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 267 | |
| 268 | data[0] = reg; |
| 269 | data[1] = (value >> 8) & 0xff; |
| 270 | data[2] = value & 0xff; |
| 271 | |
Takashi Iwai | 3e13f65 | 2010-09-23 07:40:16 +0200 | [diff] [blame] | 272 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 273 | reg < codec->driver->reg_cache_size) { |
| 274 | ret = snd_soc_cache_write(codec, reg, value); |
| 275 | if (ret < 0) |
| 276 | return -1; |
| 277 | } |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 278 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 279 | if (codec->cache_only) { |
| 280 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 281 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 282 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 283 | |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 284 | if (codec->hw_write(codec->control_data, data, 3) == 3) |
| 285 | return 0; |
| 286 | else |
| 287 | return -EIO; |
| 288 | } |
| 289 | |
| 290 | static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, |
| 291 | unsigned int reg) |
| 292 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 293 | int ret; |
| 294 | unsigned int val; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 295 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 296 | if (reg >= codec->driver->reg_cache_size || |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 297 | snd_soc_codec_volatile_register(codec, reg)) { |
| 298 | if (codec->cache_only) |
Dimitris Papastamos | 391d8a0 | 2010-09-21 17:04:07 +0100 | [diff] [blame] | 299 | return -1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 300 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 301 | BUG_ON(!codec->hw_read); |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 302 | return codec->hw_read(codec, reg); |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 303 | } |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 304 | |
| 305 | ret = snd_soc_cache_read(codec, reg, &val); |
| 306 | if (ret < 0) |
| 307 | return -1; |
| 308 | return val; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 309 | } |
| 310 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 311 | #if defined(CONFIG_SPI_MASTER) |
| 312 | static int snd_soc_8_16_spi_write(void *control_data, const char *data, |
| 313 | int len) |
| 314 | { |
| 315 | struct spi_device *spi = control_data; |
| 316 | struct spi_transfer t; |
| 317 | struct spi_message m; |
| 318 | u8 msg[3]; |
| 319 | |
| 320 | if (len <= 0) |
| 321 | return 0; |
| 322 | |
| 323 | msg[0] = data[0]; |
| 324 | msg[1] = data[1]; |
| 325 | msg[2] = data[2]; |
| 326 | |
| 327 | spi_message_init(&m); |
| 328 | memset(&t, 0, (sizeof t)); |
| 329 | |
| 330 | t.tx_buf = &msg[0]; |
| 331 | t.len = len; |
| 332 | |
| 333 | spi_message_add_tail(&t, &m); |
| 334 | spi_sync(spi, &m); |
| 335 | |
| 336 | return len; |
| 337 | } |
| 338 | #else |
| 339 | #define snd_soc_8_16_spi_write NULL |
| 340 | #endif |
| 341 | |
Randy Dunlap | 17244c2 | 2009-08-10 16:04:39 -0700 | [diff] [blame] | 342 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 343 | static unsigned int snd_soc_8_8_read_i2c(struct snd_soc_codec *codec, |
| 344 | unsigned int r) |
| 345 | { |
| 346 | struct i2c_msg xfer[2]; |
| 347 | u8 reg = r; |
| 348 | u8 data; |
| 349 | int ret; |
| 350 | struct i2c_client *client = codec->control_data; |
| 351 | |
| 352 | /* Write register */ |
| 353 | xfer[0].addr = client->addr; |
| 354 | xfer[0].flags = 0; |
| 355 | xfer[0].len = 1; |
| 356 | xfer[0].buf = ® |
| 357 | |
| 358 | /* Read data */ |
| 359 | xfer[1].addr = client->addr; |
| 360 | xfer[1].flags = I2C_M_RD; |
| 361 | xfer[1].len = 1; |
| 362 | xfer[1].buf = &data; |
| 363 | |
| 364 | ret = i2c_transfer(client->adapter, xfer, 2); |
| 365 | if (ret != 2) { |
| 366 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | return data; |
| 371 | } |
| 372 | #else |
| 373 | #define snd_soc_8_8_read_i2c NULL |
| 374 | #endif |
| 375 | |
| 376 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 377 | static unsigned int snd_soc_8_16_read_i2c(struct snd_soc_codec *codec, |
| 378 | unsigned int r) |
| 379 | { |
| 380 | struct i2c_msg xfer[2]; |
| 381 | u8 reg = r; |
| 382 | u16 data; |
| 383 | int ret; |
| 384 | struct i2c_client *client = codec->control_data; |
| 385 | |
| 386 | /* Write register */ |
| 387 | xfer[0].addr = client->addr; |
| 388 | xfer[0].flags = 0; |
| 389 | xfer[0].len = 1; |
| 390 | xfer[0].buf = ® |
| 391 | |
| 392 | /* Read data */ |
| 393 | xfer[1].addr = client->addr; |
| 394 | xfer[1].flags = I2C_M_RD; |
| 395 | xfer[1].len = 2; |
| 396 | xfer[1].buf = (u8 *)&data; |
| 397 | |
| 398 | ret = i2c_transfer(client->adapter, xfer, 2); |
| 399 | if (ret != 2) { |
| 400 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | return (data >> 8) | ((data & 0xff) << 8); |
| 405 | } |
| 406 | #else |
| 407 | #define snd_soc_8_16_read_i2c NULL |
| 408 | #endif |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 409 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 410 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| 411 | static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec, |
| 412 | unsigned int r) |
| 413 | { |
| 414 | struct i2c_msg xfer[2]; |
| 415 | u16 reg = r; |
| 416 | u8 data; |
| 417 | int ret; |
| 418 | struct i2c_client *client = codec->control_data; |
| 419 | |
| 420 | /* Write register */ |
| 421 | xfer[0].addr = client->addr; |
| 422 | xfer[0].flags = 0; |
| 423 | xfer[0].len = 2; |
| 424 | xfer[0].buf = (u8 *)® |
| 425 | |
| 426 | /* Read data */ |
| 427 | xfer[1].addr = client->addr; |
| 428 | xfer[1].flags = I2C_M_RD; |
| 429 | xfer[1].len = 1; |
| 430 | xfer[1].buf = &data; |
| 431 | |
| 432 | ret = i2c_transfer(client->adapter, xfer, 2); |
| 433 | if (ret != 2) { |
| 434 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | return data; |
| 439 | } |
| 440 | #else |
| 441 | #define snd_soc_16_8_read_i2c NULL |
| 442 | #endif |
| 443 | |
| 444 | static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec, |
| 445 | unsigned int reg) |
| 446 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 447 | int ret; |
| 448 | unsigned int val; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 449 | |
| 450 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 451 | if (reg >= codec->driver->reg_cache_size || |
| 452 | snd_soc_codec_volatile_register(codec, reg)) { |
| 453 | if (codec->cache_only) |
| 454 | return -1; |
| 455 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 456 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 457 | return codec->hw_read(codec, reg); |
| 458 | } |
| 459 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 460 | ret = snd_soc_cache_read(codec, reg, &val); |
| 461 | if (ret < 0) |
| 462 | return -1; |
| 463 | return val; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg, |
| 467 | unsigned int value) |
| 468 | { |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 469 | u8 data[3]; |
| 470 | int ret; |
| 471 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 472 | data[0] = (reg >> 8) & 0xff; |
| 473 | data[1] = reg & 0xff; |
| 474 | data[2] = value; |
| 475 | |
| 476 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 477 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 478 | reg < codec->driver->reg_cache_size) { |
| 479 | ret = snd_soc_cache_write(codec, reg, value); |
| 480 | if (ret < 0) |
| 481 | return -1; |
| 482 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 483 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 484 | if (codec->cache_only) { |
| 485 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 486 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 487 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 488 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 489 | ret = codec->hw_write(codec->control_data, data, 3); |
| 490 | if (ret == 3) |
| 491 | return 0; |
| 492 | if (ret < 0) |
| 493 | return ret; |
| 494 | else |
| 495 | return -EIO; |
| 496 | } |
| 497 | |
| 498 | #if defined(CONFIG_SPI_MASTER) |
| 499 | static int snd_soc_16_8_spi_write(void *control_data, const char *data, |
| 500 | int len) |
| 501 | { |
| 502 | struct spi_device *spi = control_data; |
| 503 | struct spi_transfer t; |
| 504 | struct spi_message m; |
| 505 | u8 msg[3]; |
| 506 | |
| 507 | if (len <= 0) |
| 508 | return 0; |
| 509 | |
| 510 | msg[0] = data[0]; |
| 511 | msg[1] = data[1]; |
| 512 | msg[2] = data[2]; |
| 513 | |
| 514 | spi_message_init(&m); |
| 515 | memset(&t, 0, (sizeof t)); |
| 516 | |
| 517 | t.tx_buf = &msg[0]; |
| 518 | t.len = len; |
| 519 | |
| 520 | spi_message_add_tail(&t, &m); |
| 521 | spi_sync(spi, &m); |
| 522 | |
| 523 | return len; |
| 524 | } |
| 525 | #else |
| 526 | #define snd_soc_16_8_spi_write NULL |
| 527 | #endif |
| 528 | |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 529 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| 530 | static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec, |
| 531 | unsigned int r) |
| 532 | { |
| 533 | struct i2c_msg xfer[2]; |
| 534 | u16 reg = cpu_to_be16(r); |
| 535 | u16 data; |
| 536 | int ret; |
| 537 | struct i2c_client *client = codec->control_data; |
| 538 | |
| 539 | /* Write register */ |
| 540 | xfer[0].addr = client->addr; |
| 541 | xfer[0].flags = 0; |
| 542 | xfer[0].len = 2; |
| 543 | xfer[0].buf = (u8 *)® |
| 544 | |
| 545 | /* Read data */ |
| 546 | xfer[1].addr = client->addr; |
| 547 | xfer[1].flags = I2C_M_RD; |
| 548 | xfer[1].len = 2; |
| 549 | xfer[1].buf = (u8 *)&data; |
| 550 | |
| 551 | ret = i2c_transfer(client->adapter, xfer, 2); |
| 552 | if (ret != 2) { |
| 553 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | return be16_to_cpu(data); |
| 558 | } |
| 559 | #else |
| 560 | #define snd_soc_16_16_read_i2c NULL |
| 561 | #endif |
| 562 | |
| 563 | static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec, |
| 564 | unsigned int reg) |
| 565 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 566 | int ret; |
| 567 | unsigned int val; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 568 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 569 | if (reg >= codec->driver->reg_cache_size || |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 570 | snd_soc_codec_volatile_register(codec, reg)) { |
| 571 | if (codec->cache_only) |
Dimitris Papastamos | 391d8a0 | 2010-09-21 17:04:07 +0100 | [diff] [blame] | 572 | return -1; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 573 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 574 | BUG_ON(!codec->hw_read); |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 575 | return codec->hw_read(codec, reg); |
| 576 | } |
| 577 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 578 | ret = snd_soc_cache_read(codec, reg, &val); |
| 579 | if (ret < 0) |
| 580 | return -1; |
| 581 | |
| 582 | return val; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg, |
| 586 | unsigned int value) |
| 587 | { |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 588 | u8 data[4]; |
| 589 | int ret; |
| 590 | |
| 591 | data[0] = (reg >> 8) & 0xff; |
| 592 | data[1] = reg & 0xff; |
| 593 | data[2] = (value >> 8) & 0xff; |
| 594 | data[3] = value & 0xff; |
| 595 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 596 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 597 | reg < codec->driver->reg_cache_size) { |
| 598 | ret = snd_soc_cache_write(codec, reg, value); |
| 599 | if (ret < 0) |
| 600 | return -1; |
| 601 | } |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 602 | |
| 603 | if (codec->cache_only) { |
| 604 | codec->cache_sync = 1; |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | ret = codec->hw_write(codec->control_data, data, 4); |
| 609 | if (ret == 4) |
| 610 | return 0; |
| 611 | if (ret < 0) |
| 612 | return ret; |
| 613 | else |
| 614 | return -EIO; |
| 615 | } |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 616 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 617 | #if defined(CONFIG_SPI_MASTER) |
| 618 | static int snd_soc_16_16_spi_write(void *control_data, const char *data, |
| 619 | int len) |
| 620 | { |
| 621 | struct spi_device *spi = control_data; |
| 622 | struct spi_transfer t; |
| 623 | struct spi_message m; |
| 624 | u8 msg[4]; |
| 625 | |
| 626 | if (len <= 0) |
| 627 | return 0; |
| 628 | |
| 629 | msg[0] = data[0]; |
| 630 | msg[1] = data[1]; |
| 631 | msg[2] = data[2]; |
| 632 | msg[3] = data[3]; |
| 633 | |
| 634 | spi_message_init(&m); |
| 635 | memset(&t, 0, (sizeof t)); |
| 636 | |
| 637 | t.tx_buf = &msg[0]; |
| 638 | t.len = len; |
| 639 | |
| 640 | spi_message_add_tail(&t, &m); |
| 641 | spi_sync(spi, &m); |
| 642 | |
| 643 | return len; |
| 644 | } |
| 645 | #else |
| 646 | #define snd_soc_16_16_spi_write NULL |
| 647 | #endif |
| 648 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 649 | static struct { |
| 650 | int addr_bits; |
| 651 | int data_bits; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 652 | int (*write)(struct snd_soc_codec *codec, unsigned int, unsigned int); |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 653 | int (*spi_write)(void *, const char *, int); |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 654 | unsigned int (*read)(struct snd_soc_codec *, unsigned int); |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 655 | unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int); |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 656 | } io_types[] = { |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 657 | { |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 658 | .addr_bits = 4, .data_bits = 12, |
| 659 | .write = snd_soc_4_12_write, .read = snd_soc_4_12_read, |
| 660 | .spi_write = snd_soc_4_12_spi_write, |
| 661 | }, |
| 662 | { |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 663 | .addr_bits = 7, .data_bits = 9, |
| 664 | .write = snd_soc_7_9_write, .read = snd_soc_7_9_read, |
Barry Song | 8998c89 | 2009-12-31 10:30:34 +0800 | [diff] [blame] | 665 | .spi_write = snd_soc_7_9_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 666 | }, |
| 667 | { |
| 668 | .addr_bits = 8, .data_bits = 8, |
| 669 | .write = snd_soc_8_8_write, .read = snd_soc_8_8_read, |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 670 | .i2c_read = snd_soc_8_8_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 671 | .spi_write = snd_soc_8_8_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 672 | }, |
| 673 | { |
| 674 | .addr_bits = 8, .data_bits = 16, |
| 675 | .write = snd_soc_8_16_write, .read = snd_soc_8_16_read, |
| 676 | .i2c_read = snd_soc_8_16_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 677 | .spi_write = snd_soc_8_16_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 678 | }, |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 679 | { |
| 680 | .addr_bits = 16, .data_bits = 8, |
| 681 | .write = snd_soc_16_8_write, .read = snd_soc_16_8_read, |
| 682 | .i2c_read = snd_soc_16_8_read_i2c, |
| 683 | .spi_write = snd_soc_16_8_spi_write, |
| 684 | }, |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 685 | { |
| 686 | .addr_bits = 16, .data_bits = 16, |
| 687 | .write = snd_soc_16_16_write, .read = snd_soc_16_16_read, |
| 688 | .i2c_read = snd_soc_16_16_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 689 | .spi_write = snd_soc_16_16_spi_write, |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 690 | }, |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 691 | }; |
| 692 | |
| 693 | /** |
| 694 | * snd_soc_codec_set_cache_io: Set up standard I/O functions. |
| 695 | * |
| 696 | * @codec: CODEC to configure. |
| 697 | * @type: Type of cache. |
| 698 | * @addr_bits: Number of bits of register address data. |
| 699 | * @data_bits: Number of bits of data per register. |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 700 | * @control: Control bus used. |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 701 | * |
| 702 | * Register formats are frequently shared between many I2C and SPI |
| 703 | * devices. In order to promote code reuse the ASoC core provides |
| 704 | * some standard implementations of CODEC read and write operations |
| 705 | * which can be set up using this function. |
| 706 | * |
| 707 | * The caller is responsible for allocating and initialising the |
| 708 | * actual cache. |
| 709 | * |
| 710 | * Note that at present this code cannot be used by CODECs with |
| 711 | * volatile registers. |
| 712 | */ |
| 713 | int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 714 | int addr_bits, int data_bits, |
| 715 | enum snd_soc_control_type control) |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 716 | { |
| 717 | int i; |
| 718 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 719 | for (i = 0; i < ARRAY_SIZE(io_types); i++) |
| 720 | if (io_types[i].addr_bits == addr_bits && |
| 721 | io_types[i].data_bits == data_bits) |
| 722 | break; |
| 723 | if (i == ARRAY_SIZE(io_types)) { |
| 724 | printk(KERN_ERR |
| 725 | "No I/O functions for %d bit address %d bit data\n", |
| 726 | addr_bits, data_bits); |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 730 | codec->driver->write = io_types[i].write; |
| 731 | codec->driver->read = io_types[i].read; |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 732 | |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 733 | switch (control) { |
| 734 | case SND_SOC_CUSTOM: |
| 735 | break; |
| 736 | |
| 737 | case SND_SOC_I2C: |
Randy Dunlap | 17244c2 | 2009-08-10 16:04:39 -0700 | [diff] [blame] | 738 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 739 | codec->hw_write = (hw_write_t)i2c_master_send; |
| 740 | #endif |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 741 | if (io_types[i].i2c_read) |
| 742 | codec->hw_read = io_types[i].i2c_read; |
Mark Brown | a6d1434 | 2010-08-12 10:59:15 +0100 | [diff] [blame] | 743 | |
| 744 | codec->control_data = container_of(codec->dev, |
| 745 | struct i2c_client, |
| 746 | dev); |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 747 | break; |
| 748 | |
| 749 | case SND_SOC_SPI: |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 750 | if (io_types[i].spi_write) |
| 751 | codec->hw_write = io_types[i].spi_write; |
Mark Brown | a6d1434 | 2010-08-12 10:59:15 +0100 | [diff] [blame] | 752 | |
| 753 | codec->control_data = container_of(codec->dev, |
| 754 | struct spi_device, |
| 755 | dev); |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 756 | break; |
| 757 | } |
| 758 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 759 | return 0; |
| 760 | } |
| 761 | EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 762 | |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame^] | 763 | struct snd_soc_lzo_ctx { |
| 764 | void *wmem; |
| 765 | void *dst; |
| 766 | const void *src; |
| 767 | size_t src_len; |
| 768 | size_t dst_len; |
| 769 | size_t decompressed_size; |
| 770 | unsigned long *sync_bmp; |
| 771 | int sync_bmp_nbits; |
| 772 | }; |
| 773 | |
| 774 | #define LZO_BLOCK_NUM 8 |
| 775 | static int snd_soc_lzo_block_count(void) |
| 776 | { |
| 777 | return LZO_BLOCK_NUM; |
| 778 | } |
| 779 | |
| 780 | static int snd_soc_lzo_prepare(struct snd_soc_lzo_ctx *lzo_ctx) |
| 781 | { |
| 782 | lzo_ctx->wmem = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); |
| 783 | if (!lzo_ctx->wmem) |
| 784 | return -ENOMEM; |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | static int snd_soc_lzo_compress(struct snd_soc_lzo_ctx *lzo_ctx) |
| 789 | { |
| 790 | size_t compress_size; |
| 791 | int ret; |
| 792 | |
| 793 | ret = lzo1x_1_compress(lzo_ctx->src, lzo_ctx->src_len, |
| 794 | lzo_ctx->dst, &compress_size, lzo_ctx->wmem); |
| 795 | if (ret != LZO_E_OK || compress_size > lzo_ctx->dst_len) |
| 796 | return -EINVAL; |
| 797 | lzo_ctx->dst_len = compress_size; |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | static int snd_soc_lzo_decompress(struct snd_soc_lzo_ctx *lzo_ctx) |
| 802 | { |
| 803 | size_t dst_len; |
| 804 | int ret; |
| 805 | |
| 806 | dst_len = lzo_ctx->dst_len; |
| 807 | ret = lzo1x_decompress_safe(lzo_ctx->src, lzo_ctx->src_len, |
| 808 | lzo_ctx->dst, &dst_len); |
| 809 | if (ret != LZO_E_OK || dst_len != lzo_ctx->dst_len) |
| 810 | return -EINVAL; |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static int snd_soc_lzo_compress_cache_block(struct snd_soc_codec *codec, |
| 815 | struct snd_soc_lzo_ctx *lzo_ctx) |
| 816 | { |
| 817 | int ret; |
| 818 | |
| 819 | lzo_ctx->dst_len = lzo1x_worst_compress(PAGE_SIZE); |
| 820 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); |
| 821 | if (!lzo_ctx->dst) { |
| 822 | lzo_ctx->dst_len = 0; |
| 823 | return -ENOMEM; |
| 824 | } |
| 825 | |
| 826 | ret = snd_soc_lzo_compress(lzo_ctx); |
| 827 | if (ret < 0) |
| 828 | return ret; |
| 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | static int snd_soc_lzo_decompress_cache_block(struct snd_soc_codec *codec, |
| 833 | struct snd_soc_lzo_ctx *lzo_ctx) |
| 834 | { |
| 835 | int ret; |
| 836 | |
| 837 | lzo_ctx->dst_len = lzo_ctx->decompressed_size; |
| 838 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); |
| 839 | if (!lzo_ctx->dst) { |
| 840 | lzo_ctx->dst_len = 0; |
| 841 | return -ENOMEM; |
| 842 | } |
| 843 | |
| 844 | ret = snd_soc_lzo_decompress(lzo_ctx); |
| 845 | if (ret < 0) |
| 846 | return ret; |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec, |
| 851 | unsigned int reg) |
| 852 | { |
| 853 | struct snd_soc_codec_driver *codec_drv; |
| 854 | size_t reg_size; |
| 855 | |
| 856 | codec_drv = codec->driver; |
| 857 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; |
| 858 | return (reg * codec_drv->reg_word_size) / |
| 859 | DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()); |
| 860 | } |
| 861 | |
| 862 | static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec, |
| 863 | unsigned int reg) |
| 864 | { |
| 865 | struct snd_soc_codec_driver *codec_drv; |
| 866 | size_t reg_size; |
| 867 | |
| 868 | codec_drv = codec->driver; |
| 869 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; |
| 870 | return reg % (DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()) / |
| 871 | codec_drv->reg_word_size); |
| 872 | } |
| 873 | |
| 874 | static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec) |
| 875 | { |
| 876 | struct snd_soc_codec_driver *codec_drv; |
| 877 | size_t reg_size; |
| 878 | |
| 879 | codec_drv = codec->driver; |
| 880 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; |
| 881 | return DIV_ROUND_UP(reg_size, snd_soc_lzo_block_count()); |
| 882 | } |
| 883 | |
| 884 | static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec) |
| 885 | { |
| 886 | struct snd_soc_lzo_ctx **lzo_blocks; |
| 887 | unsigned int val; |
| 888 | int i; |
| 889 | |
| 890 | lzo_blocks = codec->reg_cache; |
| 891 | for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { |
| 892 | snd_soc_cache_read(codec, i, &val); |
| 893 | snd_soc_write(codec, i, val); |
| 894 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
| 895 | i, val); |
| 896 | } |
| 897 | |
| 898 | return 0; |
| 899 | } |
| 900 | |
| 901 | static int snd_soc_lzo_cache_write(struct snd_soc_codec *codec, |
| 902 | unsigned int reg, unsigned int value) |
| 903 | { |
| 904 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; |
| 905 | int ret, blkindex, blkpos; |
| 906 | size_t blksize, tmp_dst_len; |
| 907 | void *tmp_dst; |
| 908 | |
| 909 | /* index of the compressed lzo block */ |
| 910 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); |
| 911 | /* register index within the decompressed block */ |
| 912 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); |
| 913 | /* size of the compressed block */ |
| 914 | blksize = snd_soc_lzo_get_blksize(codec); |
| 915 | lzo_blocks = codec->reg_cache; |
| 916 | lzo_block = lzo_blocks[blkindex]; |
| 917 | |
| 918 | /* save the pointer and length of the compressed block */ |
| 919 | tmp_dst = lzo_block->dst; |
| 920 | tmp_dst_len = lzo_block->dst_len; |
| 921 | |
| 922 | /* prepare the source to be the compressed block */ |
| 923 | lzo_block->src = lzo_block->dst; |
| 924 | lzo_block->src_len = lzo_block->dst_len; |
| 925 | |
| 926 | /* decompress the block */ |
| 927 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); |
| 928 | if (ret < 0) { |
| 929 | kfree(lzo_block->dst); |
| 930 | goto out; |
| 931 | } |
| 932 | |
| 933 | /* write the new value to the cache */ |
| 934 | switch (codec->driver->reg_word_size) { |
| 935 | case 1: { |
| 936 | u8 *cache; |
| 937 | cache = lzo_block->dst; |
| 938 | if (cache[blkpos] == value) { |
| 939 | kfree(lzo_block->dst); |
| 940 | goto out; |
| 941 | } |
| 942 | cache[blkpos] = value; |
| 943 | } |
| 944 | break; |
| 945 | case 2: { |
| 946 | u16 *cache; |
| 947 | cache = lzo_block->dst; |
| 948 | if (cache[blkpos] == value) { |
| 949 | kfree(lzo_block->dst); |
| 950 | goto out; |
| 951 | } |
| 952 | cache[blkpos] = value; |
| 953 | } |
| 954 | break; |
| 955 | default: |
| 956 | BUG(); |
| 957 | } |
| 958 | |
| 959 | /* prepare the source to be the decompressed block */ |
| 960 | lzo_block->src = lzo_block->dst; |
| 961 | lzo_block->src_len = lzo_block->dst_len; |
| 962 | |
| 963 | /* compress the block */ |
| 964 | ret = snd_soc_lzo_compress_cache_block(codec, lzo_block); |
| 965 | if (ret < 0) { |
| 966 | kfree(lzo_block->dst); |
| 967 | kfree(lzo_block->src); |
| 968 | goto out; |
| 969 | } |
| 970 | |
| 971 | /* set the bit so we know we have to sync this register */ |
| 972 | set_bit(reg, lzo_block->sync_bmp); |
| 973 | kfree(tmp_dst); |
| 974 | kfree(lzo_block->src); |
| 975 | return 0; |
| 976 | out: |
| 977 | lzo_block->dst = tmp_dst; |
| 978 | lzo_block->dst_len = tmp_dst_len; |
| 979 | return ret; |
| 980 | } |
| 981 | |
| 982 | static int snd_soc_lzo_cache_read(struct snd_soc_codec *codec, |
| 983 | unsigned int reg, unsigned int *value) |
| 984 | { |
| 985 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; |
| 986 | int ret, blkindex, blkpos; |
| 987 | size_t blksize, tmp_dst_len; |
| 988 | void *tmp_dst; |
| 989 | |
| 990 | *value = 0; |
| 991 | /* index of the compressed lzo block */ |
| 992 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); |
| 993 | /* register index within the decompressed block */ |
| 994 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); |
| 995 | /* size of the compressed block */ |
| 996 | blksize = snd_soc_lzo_get_blksize(codec); |
| 997 | lzo_blocks = codec->reg_cache; |
| 998 | lzo_block = lzo_blocks[blkindex]; |
| 999 | |
| 1000 | /* save the pointer and length of the compressed block */ |
| 1001 | tmp_dst = lzo_block->dst; |
| 1002 | tmp_dst_len = lzo_block->dst_len; |
| 1003 | |
| 1004 | /* prepare the source to be the compressed block */ |
| 1005 | lzo_block->src = lzo_block->dst; |
| 1006 | lzo_block->src_len = lzo_block->dst_len; |
| 1007 | |
| 1008 | /* decompress the block */ |
| 1009 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); |
| 1010 | if (ret >= 0) { |
| 1011 | /* fetch the value from the cache */ |
| 1012 | switch (codec->driver->reg_word_size) { |
| 1013 | case 1: { |
| 1014 | u8 *cache; |
| 1015 | cache = lzo_block->dst; |
| 1016 | *value = cache[blkpos]; |
| 1017 | } |
| 1018 | break; |
| 1019 | case 2: { |
| 1020 | u16 *cache; |
| 1021 | cache = lzo_block->dst; |
| 1022 | *value = cache[blkpos]; |
| 1023 | } |
| 1024 | break; |
| 1025 | default: |
| 1026 | BUG(); |
| 1027 | } |
| 1028 | } |
| 1029 | |
| 1030 | kfree(lzo_block->dst); |
| 1031 | /* restore the pointer and length of the compressed block */ |
| 1032 | lzo_block->dst = tmp_dst; |
| 1033 | lzo_block->dst_len = tmp_dst_len; |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | static int snd_soc_lzo_cache_exit(struct snd_soc_codec *codec) |
| 1038 | { |
| 1039 | struct snd_soc_lzo_ctx **lzo_blocks; |
| 1040 | int i, blkcount; |
| 1041 | |
| 1042 | lzo_blocks = codec->reg_cache; |
| 1043 | if (!lzo_blocks) |
| 1044 | return 0; |
| 1045 | |
| 1046 | blkcount = snd_soc_lzo_block_count(); |
| 1047 | /* |
| 1048 | * the pointer to the bitmap used for syncing the cache |
| 1049 | * is shared amongst all lzo_blocks. Ensure it is freed |
| 1050 | * only once. |
| 1051 | */ |
| 1052 | if (lzo_blocks[0]) |
| 1053 | kfree(lzo_blocks[0]->sync_bmp); |
| 1054 | for (i = 0; i < blkcount; ++i) { |
| 1055 | if (lzo_blocks[i]) { |
| 1056 | kfree(lzo_blocks[i]->wmem); |
| 1057 | kfree(lzo_blocks[i]->dst); |
| 1058 | } |
| 1059 | /* each lzo_block is a pointer returned by kmalloc or NULL */ |
| 1060 | kfree(lzo_blocks[i]); |
| 1061 | } |
| 1062 | kfree(lzo_blocks); |
| 1063 | codec->reg_cache = NULL; |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec) |
| 1068 | { |
| 1069 | struct snd_soc_lzo_ctx **lzo_blocks; |
| 1070 | size_t reg_size, bmp_size; |
| 1071 | struct snd_soc_codec_driver *codec_drv; |
| 1072 | int ret, tofree, i, blksize, blkcount; |
| 1073 | const char *p, *end; |
| 1074 | unsigned long *sync_bmp; |
| 1075 | |
| 1076 | ret = 0; |
| 1077 | codec_drv = codec->driver; |
| 1078 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; |
| 1079 | |
| 1080 | /* |
| 1081 | * If we have not been given a default register cache |
| 1082 | * then allocate a dummy zero-ed out region, compress it |
| 1083 | * and remember to free it afterwards. |
| 1084 | */ |
| 1085 | tofree = 0; |
| 1086 | if (!codec_drv->reg_cache_default) |
| 1087 | tofree = 1; |
| 1088 | |
| 1089 | if (!codec_drv->reg_cache_default) { |
| 1090 | codec_drv->reg_cache_default = kzalloc(reg_size, |
| 1091 | GFP_KERNEL); |
| 1092 | if (!codec_drv->reg_cache_default) |
| 1093 | return -ENOMEM; |
| 1094 | } |
| 1095 | |
| 1096 | blkcount = snd_soc_lzo_block_count(); |
| 1097 | codec->reg_cache = kzalloc(blkcount * sizeof *lzo_blocks, |
| 1098 | GFP_KERNEL); |
| 1099 | if (!codec->reg_cache) { |
| 1100 | ret = -ENOMEM; |
| 1101 | goto err_tofree; |
| 1102 | } |
| 1103 | lzo_blocks = codec->reg_cache; |
| 1104 | |
| 1105 | /* |
| 1106 | * allocate a bitmap to be used when syncing the cache with |
| 1107 | * the hardware. Each time a register is modified, the corresponding |
| 1108 | * bit is set in the bitmap, so we know that we have to sync |
| 1109 | * that register. |
| 1110 | */ |
| 1111 | bmp_size = codec_drv->reg_cache_size; |
| 1112 | sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof (long), |
| 1113 | GFP_KERNEL); |
| 1114 | if (!sync_bmp) { |
| 1115 | ret = -ENOMEM; |
| 1116 | goto err; |
| 1117 | } |
| 1118 | bitmap_zero(sync_bmp, reg_size); |
| 1119 | |
| 1120 | /* allocate the lzo blocks and initialize them */ |
| 1121 | for (i = 0; i < blkcount; ++i) { |
| 1122 | lzo_blocks[i] = kzalloc(sizeof **lzo_blocks, |
| 1123 | GFP_KERNEL); |
| 1124 | if (!lzo_blocks[i]) { |
| 1125 | kfree(sync_bmp); |
| 1126 | ret = -ENOMEM; |
| 1127 | goto err; |
| 1128 | } |
| 1129 | lzo_blocks[i]->sync_bmp = sync_bmp; |
| 1130 | lzo_blocks[i]->sync_bmp_nbits = reg_size; |
| 1131 | /* alloc the working space for the compressed block */ |
| 1132 | ret = snd_soc_lzo_prepare(lzo_blocks[i]); |
| 1133 | if (ret < 0) |
| 1134 | goto err; |
| 1135 | } |
| 1136 | |
| 1137 | blksize = snd_soc_lzo_get_blksize(codec); |
| 1138 | p = codec_drv->reg_cache_default; |
| 1139 | end = codec_drv->reg_cache_default + reg_size; |
| 1140 | /* compress the register map and fill the lzo blocks */ |
| 1141 | for (i = 0; i < blkcount; ++i, p += blksize) { |
| 1142 | lzo_blocks[i]->src = p; |
| 1143 | if (p + blksize > end) |
| 1144 | lzo_blocks[i]->src_len = end - p; |
| 1145 | else |
| 1146 | lzo_blocks[i]->src_len = blksize; |
| 1147 | ret = snd_soc_lzo_compress_cache_block(codec, |
| 1148 | lzo_blocks[i]); |
| 1149 | if (ret < 0) |
| 1150 | goto err; |
| 1151 | lzo_blocks[i]->decompressed_size = |
| 1152 | lzo_blocks[i]->src_len; |
| 1153 | } |
| 1154 | |
| 1155 | if (tofree) |
| 1156 | kfree(codec_drv->reg_cache_default); |
| 1157 | return 0; |
| 1158 | err: |
| 1159 | snd_soc_cache_exit(codec); |
| 1160 | err_tofree: |
| 1161 | if (tofree) |
| 1162 | kfree(codec_drv->reg_cache_default); |
| 1163 | return ret; |
| 1164 | } |
| 1165 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1166 | static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec) |
| 1167 | { |
| 1168 | int i; |
| 1169 | struct snd_soc_codec_driver *codec_drv; |
| 1170 | unsigned int val; |
| 1171 | |
| 1172 | codec_drv = codec->driver; |
| 1173 | for (i = 0; i < codec_drv->reg_cache_size; ++i) { |
| 1174 | snd_soc_cache_read(codec, i, &val); |
| 1175 | if (codec_drv->reg_cache_default) { |
| 1176 | switch (codec_drv->reg_word_size) { |
| 1177 | case 1: { |
| 1178 | const u8 *cache; |
| 1179 | |
| 1180 | cache = codec_drv->reg_cache_default; |
| 1181 | if (cache[i] == val) |
| 1182 | continue; |
| 1183 | } |
| 1184 | break; |
| 1185 | case 2: { |
| 1186 | const u16 *cache; |
| 1187 | |
| 1188 | cache = codec_drv->reg_cache_default; |
| 1189 | if (cache[i] == val) |
| 1190 | continue; |
| 1191 | } |
| 1192 | break; |
| 1193 | default: |
| 1194 | BUG(); |
| 1195 | } |
| 1196 | } |
| 1197 | snd_soc_write(codec, i, val); |
| 1198 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
| 1199 | i, val); |
| 1200 | } |
| 1201 | return 0; |
| 1202 | } |
| 1203 | |
| 1204 | static int snd_soc_flat_cache_write(struct snd_soc_codec *codec, |
| 1205 | unsigned int reg, unsigned int value) |
| 1206 | { |
| 1207 | switch (codec->driver->reg_word_size) { |
| 1208 | case 1: { |
| 1209 | u8 *cache; |
| 1210 | |
| 1211 | cache = codec->reg_cache; |
| 1212 | cache[reg] = value; |
| 1213 | } |
| 1214 | break; |
| 1215 | case 2: { |
| 1216 | u16 *cache; |
| 1217 | |
| 1218 | cache = codec->reg_cache; |
| 1219 | cache[reg] = value; |
| 1220 | } |
| 1221 | break; |
| 1222 | default: |
| 1223 | BUG(); |
| 1224 | } |
| 1225 | |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | static int snd_soc_flat_cache_read(struct snd_soc_codec *codec, |
| 1230 | unsigned int reg, unsigned int *value) |
| 1231 | { |
| 1232 | switch (codec->driver->reg_word_size) { |
| 1233 | case 1: { |
| 1234 | u8 *cache; |
| 1235 | |
| 1236 | cache = codec->reg_cache; |
| 1237 | *value = cache[reg]; |
| 1238 | } |
| 1239 | break; |
| 1240 | case 2: { |
| 1241 | u16 *cache; |
| 1242 | |
| 1243 | cache = codec->reg_cache; |
| 1244 | *value = cache[reg]; |
| 1245 | } |
| 1246 | break; |
| 1247 | default: |
| 1248 | BUG(); |
| 1249 | } |
| 1250 | |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec) |
| 1255 | { |
| 1256 | if (!codec->reg_cache) |
| 1257 | return 0; |
| 1258 | kfree(codec->reg_cache); |
| 1259 | codec->reg_cache = NULL; |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static int snd_soc_flat_cache_init(struct snd_soc_codec *codec) |
| 1264 | { |
| 1265 | struct snd_soc_codec_driver *codec_drv; |
| 1266 | size_t reg_size; |
| 1267 | |
| 1268 | codec_drv = codec->driver; |
| 1269 | reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size; |
| 1270 | |
| 1271 | if (codec_drv->reg_cache_default) |
| 1272 | codec->reg_cache = kmemdup(codec_drv->reg_cache_default, |
| 1273 | reg_size, GFP_KERNEL); |
| 1274 | else |
| 1275 | codec->reg_cache = kzalloc(reg_size, GFP_KERNEL); |
| 1276 | if (!codec->reg_cache) |
| 1277 | return -ENOMEM; |
| 1278 | |
| 1279 | return 0; |
| 1280 | } |
| 1281 | |
| 1282 | /* an array of all supported compression types */ |
| 1283 | static const struct snd_soc_cache_ops cache_types[] = { |
| 1284 | { |
| 1285 | .id = SND_SOC_NO_COMPRESSION, |
| 1286 | .init = snd_soc_flat_cache_init, |
| 1287 | .exit = snd_soc_flat_cache_exit, |
| 1288 | .read = snd_soc_flat_cache_read, |
| 1289 | .write = snd_soc_flat_cache_write, |
| 1290 | .sync = snd_soc_flat_cache_sync |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame^] | 1291 | }, |
| 1292 | { |
| 1293 | .id = SND_SOC_LZO_COMPRESSION, |
| 1294 | .init = snd_soc_lzo_cache_init, |
| 1295 | .exit = snd_soc_lzo_cache_exit, |
| 1296 | .read = snd_soc_lzo_cache_read, |
| 1297 | .write = snd_soc_lzo_cache_write, |
| 1298 | .sync = snd_soc_lzo_cache_sync |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1299 | } |
| 1300 | }; |
| 1301 | |
| 1302 | int snd_soc_cache_init(struct snd_soc_codec *codec) |
| 1303 | { |
| 1304 | int i; |
| 1305 | |
| 1306 | for (i = 0; i < ARRAY_SIZE(cache_types); ++i) |
| 1307 | if (cache_types[i].id == codec->driver->compress_type) |
| 1308 | break; |
| 1309 | if (i == ARRAY_SIZE(cache_types)) { |
| 1310 | dev_err(codec->dev, "Could not match compress type: %d\n", |
| 1311 | codec->driver->compress_type); |
| 1312 | return -EINVAL; |
| 1313 | } |
| 1314 | |
| 1315 | mutex_init(&codec->cache_rw_mutex); |
| 1316 | codec->cache_ops = &cache_types[i]; |
| 1317 | |
| 1318 | if (codec->cache_ops->init) |
| 1319 | return codec->cache_ops->init(codec); |
| 1320 | return -EINVAL; |
| 1321 | } |
| 1322 | |
| 1323 | /* |
| 1324 | * NOTE: keep in mind that this function might be called |
| 1325 | * multiple times. |
| 1326 | */ |
| 1327 | int snd_soc_cache_exit(struct snd_soc_codec *codec) |
| 1328 | { |
| 1329 | if (codec->cache_ops && codec->cache_ops->exit) |
| 1330 | return codec->cache_ops->exit(codec); |
| 1331 | return -EINVAL; |
| 1332 | } |
| 1333 | |
| 1334 | /** |
| 1335 | * snd_soc_cache_read: Fetch the value of a given register from the cache. |
| 1336 | * |
| 1337 | * @codec: CODEC to configure. |
| 1338 | * @reg: The register index. |
| 1339 | * @value: The value to be returned. |
| 1340 | */ |
| 1341 | int snd_soc_cache_read(struct snd_soc_codec *codec, |
| 1342 | unsigned int reg, unsigned int *value) |
| 1343 | { |
| 1344 | int ret; |
| 1345 | |
| 1346 | mutex_lock(&codec->cache_rw_mutex); |
| 1347 | |
| 1348 | if (value && codec->cache_ops && codec->cache_ops->read) { |
| 1349 | ret = codec->cache_ops->read(codec, reg, value); |
| 1350 | mutex_unlock(&codec->cache_rw_mutex); |
| 1351 | return ret; |
| 1352 | } |
| 1353 | |
| 1354 | mutex_unlock(&codec->cache_rw_mutex); |
| 1355 | return -EINVAL; |
| 1356 | } |
| 1357 | EXPORT_SYMBOL_GPL(snd_soc_cache_read); |
| 1358 | |
| 1359 | /** |
| 1360 | * snd_soc_cache_write: Set the value of a given register in the cache. |
| 1361 | * |
| 1362 | * @codec: CODEC to configure. |
| 1363 | * @reg: The register index. |
| 1364 | * @value: The new register value. |
| 1365 | */ |
| 1366 | int snd_soc_cache_write(struct snd_soc_codec *codec, |
| 1367 | unsigned int reg, unsigned int value) |
| 1368 | { |
| 1369 | int ret; |
| 1370 | |
| 1371 | mutex_lock(&codec->cache_rw_mutex); |
| 1372 | |
| 1373 | if (codec->cache_ops && codec->cache_ops->write) { |
| 1374 | ret = codec->cache_ops->write(codec, reg, value); |
| 1375 | mutex_unlock(&codec->cache_rw_mutex); |
| 1376 | return ret; |
| 1377 | } |
| 1378 | |
| 1379 | mutex_unlock(&codec->cache_rw_mutex); |
| 1380 | return -EINVAL; |
| 1381 | } |
| 1382 | EXPORT_SYMBOL_GPL(snd_soc_cache_write); |
| 1383 | |
| 1384 | /** |
| 1385 | * snd_soc_cache_sync: Sync the register cache with the hardware. |
| 1386 | * |
| 1387 | * @codec: CODEC to configure. |
| 1388 | * |
| 1389 | * Any registers that should not be synced should be marked as |
| 1390 | * volatile. In general drivers can choose not to use the provided |
| 1391 | * syncing functionality if they so require. |
| 1392 | */ |
| 1393 | int snd_soc_cache_sync(struct snd_soc_codec *codec) |
| 1394 | { |
| 1395 | int ret; |
| 1396 | |
| 1397 | if (!codec->cache_sync) { |
| 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | if (codec->cache_ops && codec->cache_ops->sync) { |
| 1402 | ret = codec->cache_ops->sync(codec); |
| 1403 | if (!ret) |
| 1404 | codec->cache_sync = 0; |
| 1405 | return ret; |
| 1406 | } |
| 1407 | |
| 1408 | return -EINVAL; |
| 1409 | } |
| 1410 | EXPORT_SYMBOL_GPL(snd_soc_cache_sync); |