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> |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 19 | #include <linux/rbtree.h> |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 20 | |
Dimitris Papastamos | c358e64 | 2011-01-21 15:29:02 +0000 | [diff] [blame] | 21 | #include <trace/events/asoc.h> |
| 22 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 23 | static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec, |
| 24 | unsigned int reg) |
| 25 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 26 | int ret; |
| 27 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 28 | |
| 29 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 30 | snd_soc_codec_volatile_register(codec, reg) || |
| 31 | codec->cache_bypass) { |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 32 | if (codec->cache_only) |
| 33 | return -1; |
| 34 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 35 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 36 | return codec->hw_read(codec, reg); |
| 37 | } |
| 38 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 39 | ret = snd_soc_cache_read(codec, reg, &val); |
| 40 | if (ret < 0) |
| 41 | return -1; |
| 42 | return val; |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg, |
| 46 | unsigned int value) |
| 47 | { |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 48 | u8 data[2]; |
| 49 | int ret; |
| 50 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 51 | data[0] = (reg << 4) | ((value >> 8) & 0x000f); |
| 52 | data[1] = value & 0x00ff; |
| 53 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 54 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 55 | reg < codec->driver->reg_cache_size && |
| 56 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 57 | ret = snd_soc_cache_write(codec, reg, value); |
| 58 | if (ret < 0) |
| 59 | return -1; |
| 60 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 61 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 62 | if (codec->cache_only) { |
| 63 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 64 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 65 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 66 | |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 67 | ret = codec->hw_write(codec->control_data, data, 2); |
| 68 | if (ret == 2) |
| 69 | return 0; |
| 70 | if (ret < 0) |
| 71 | return ret; |
| 72 | else |
| 73 | return -EIO; |
| 74 | } |
| 75 | |
| 76 | #if defined(CONFIG_SPI_MASTER) |
| 77 | static int snd_soc_4_12_spi_write(void *control_data, const char *data, |
| 78 | int len) |
| 79 | { |
| 80 | struct spi_device *spi = control_data; |
| 81 | struct spi_transfer t; |
| 82 | struct spi_message m; |
| 83 | u8 msg[2]; |
| 84 | |
| 85 | if (len <= 0) |
| 86 | return 0; |
| 87 | |
| 88 | msg[0] = data[1]; |
| 89 | msg[1] = data[0]; |
| 90 | |
| 91 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 92 | memset(&t, 0, sizeof t); |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 93 | |
| 94 | t.tx_buf = &msg[0]; |
| 95 | t.len = len; |
| 96 | |
| 97 | spi_message_add_tail(&t, &m); |
| 98 | spi_sync(spi, &m); |
| 99 | |
| 100 | return len; |
| 101 | } |
| 102 | #else |
| 103 | #define snd_soc_4_12_spi_write NULL |
| 104 | #endif |
| 105 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 106 | static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec, |
| 107 | unsigned int reg) |
| 108 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 109 | int ret; |
| 110 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 111 | |
| 112 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 113 | snd_soc_codec_volatile_register(codec, reg) || |
| 114 | codec->cache_bypass) { |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 115 | if (codec->cache_only) |
| 116 | return -1; |
| 117 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 118 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 119 | return codec->hw_read(codec, reg); |
| 120 | } |
| 121 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 122 | ret = snd_soc_cache_read(codec, reg, &val); |
| 123 | if (ret < 0) |
| 124 | return -1; |
| 125 | return val; |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, |
| 129 | unsigned int value) |
| 130 | { |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 131 | u8 data[2]; |
| 132 | int ret; |
| 133 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 134 | data[0] = (reg << 1) | ((value >> 8) & 0x0001); |
| 135 | data[1] = value & 0x00ff; |
| 136 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 137 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 138 | reg < codec->driver->reg_cache_size && |
| 139 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 140 | ret = snd_soc_cache_write(codec, reg, value); |
| 141 | if (ret < 0) |
| 142 | return -1; |
| 143 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 144 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 145 | if (codec->cache_only) { |
| 146 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 147 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 148 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 149 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 150 | ret = codec->hw_write(codec->control_data, data, 2); |
| 151 | if (ret == 2) |
| 152 | return 0; |
| 153 | if (ret < 0) |
| 154 | return ret; |
| 155 | else |
| 156 | return -EIO; |
| 157 | } |
| 158 | |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 159 | #if defined(CONFIG_SPI_MASTER) |
| 160 | static int snd_soc_7_9_spi_write(void *control_data, const char *data, |
| 161 | int len) |
| 162 | { |
| 163 | struct spi_device *spi = control_data; |
| 164 | struct spi_transfer t; |
| 165 | struct spi_message m; |
| 166 | u8 msg[2]; |
| 167 | |
| 168 | if (len <= 0) |
| 169 | return 0; |
| 170 | |
| 171 | msg[0] = data[0]; |
| 172 | msg[1] = data[1]; |
| 173 | |
| 174 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 175 | memset(&t, 0, sizeof t); |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 176 | |
| 177 | t.tx_buf = &msg[0]; |
| 178 | t.len = len; |
| 179 | |
| 180 | spi_message_add_tail(&t, &m); |
| 181 | spi_sync(spi, &m); |
| 182 | |
| 183 | return len; |
| 184 | } |
| 185 | #else |
| 186 | #define snd_soc_7_9_spi_write NULL |
| 187 | #endif |
| 188 | |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 189 | static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg, |
| 190 | unsigned int value) |
| 191 | { |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 192 | u8 data[2]; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 193 | int ret; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 194 | |
Barry Song | f4bee1b | 2010-03-18 16:17:01 +0800 | [diff] [blame] | 195 | reg &= 0xff; |
| 196 | data[0] = reg; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 197 | data[1] = value & 0xff; |
| 198 | |
Dimitris Papastamos | 005d65f | 2010-09-22 16:16:06 +0100 | [diff] [blame] | 199 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 200 | reg < codec->driver->reg_cache_size && |
| 201 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 202 | ret = snd_soc_cache_write(codec, reg, value); |
| 203 | if (ret < 0) |
| 204 | return -1; |
| 205 | } |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 206 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 207 | if (codec->cache_only) { |
| 208 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 209 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 210 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 211 | |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 212 | if (codec->hw_write(codec->control_data, data, 2) == 2) |
| 213 | return 0; |
| 214 | else |
| 215 | return -EIO; |
| 216 | } |
| 217 | |
| 218 | static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec, |
| 219 | unsigned int reg) |
| 220 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 221 | int ret; |
| 222 | unsigned int val; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 223 | |
Barry Song | f4bee1b | 2010-03-18 16:17:01 +0800 | [diff] [blame] | 224 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 225 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 226 | snd_soc_codec_volatile_register(codec, reg) || |
| 227 | codec->cache_bypass) { |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 228 | if (codec->cache_only) |
| 229 | return -1; |
| 230 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 231 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 232 | return codec->hw_read(codec, reg); |
| 233 | } |
| 234 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 235 | ret = snd_soc_cache_read(codec, reg, &val); |
| 236 | if (ret < 0) |
| 237 | return -1; |
| 238 | return val; |
Joonyoung Shim | 341c9b8 | 2009-09-07 12:04:37 +0900 | [diff] [blame] | 239 | } |
| 240 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 241 | #if defined(CONFIG_SPI_MASTER) |
| 242 | static int snd_soc_8_8_spi_write(void *control_data, const char *data, |
| 243 | int len) |
| 244 | { |
| 245 | struct spi_device *spi = control_data; |
| 246 | struct spi_transfer t; |
| 247 | struct spi_message m; |
| 248 | u8 msg[2]; |
| 249 | |
| 250 | if (len <= 0) |
| 251 | return 0; |
| 252 | |
| 253 | msg[0] = data[0]; |
| 254 | msg[1] = data[1]; |
| 255 | |
| 256 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 257 | memset(&t, 0, sizeof t); |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 258 | |
| 259 | t.tx_buf = &msg[0]; |
| 260 | t.len = len; |
| 261 | |
| 262 | spi_message_add_tail(&t, &m); |
| 263 | spi_sync(spi, &m); |
| 264 | |
| 265 | return len; |
| 266 | } |
| 267 | #else |
| 268 | #define snd_soc_8_8_spi_write NULL |
| 269 | #endif |
| 270 | |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 271 | static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, |
| 272 | unsigned int value) |
| 273 | { |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 274 | u8 data[3]; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 275 | int ret; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 276 | |
| 277 | data[0] = reg; |
| 278 | data[1] = (value >> 8) & 0xff; |
| 279 | data[2] = value & 0xff; |
| 280 | |
Takashi Iwai | 3e13f65 | 2010-09-23 07:40:16 +0200 | [diff] [blame] | 281 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 282 | reg < codec->driver->reg_cache_size && |
| 283 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 284 | ret = snd_soc_cache_write(codec, reg, value); |
| 285 | if (ret < 0) |
| 286 | return -1; |
| 287 | } |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 288 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 289 | if (codec->cache_only) { |
| 290 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 291 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 292 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 293 | |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 294 | if (codec->hw_write(codec->control_data, data, 3) == 3) |
| 295 | return 0; |
| 296 | else |
| 297 | return -EIO; |
| 298 | } |
| 299 | |
| 300 | static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, |
| 301 | unsigned int reg) |
| 302 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 303 | int ret; |
| 304 | unsigned int val; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 305 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 306 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 307 | snd_soc_codec_volatile_register(codec, reg) || |
| 308 | codec->cache_bypass) { |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 309 | if (codec->cache_only) |
Dimitris Papastamos | 391d8a0 | 2010-09-21 17:04:07 +0100 | [diff] [blame] | 310 | return -1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 311 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 312 | BUG_ON(!codec->hw_read); |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 313 | return codec->hw_read(codec, reg); |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 314 | } |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 315 | |
| 316 | ret = snd_soc_cache_read(codec, reg, &val); |
| 317 | if (ret < 0) |
| 318 | return -1; |
| 319 | return val; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 320 | } |
| 321 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 322 | #if defined(CONFIG_SPI_MASTER) |
| 323 | static int snd_soc_8_16_spi_write(void *control_data, const char *data, |
| 324 | int len) |
| 325 | { |
| 326 | struct spi_device *spi = control_data; |
| 327 | struct spi_transfer t; |
| 328 | struct spi_message m; |
| 329 | u8 msg[3]; |
| 330 | |
| 331 | if (len <= 0) |
| 332 | return 0; |
| 333 | |
| 334 | msg[0] = data[0]; |
| 335 | msg[1] = data[1]; |
| 336 | msg[2] = data[2]; |
| 337 | |
| 338 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 339 | memset(&t, 0, sizeof t); |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 340 | |
| 341 | t.tx_buf = &msg[0]; |
| 342 | t.len = len; |
| 343 | |
| 344 | spi_message_add_tail(&t, &m); |
| 345 | spi_sync(spi, &m); |
| 346 | |
| 347 | return len; |
| 348 | } |
| 349 | #else |
| 350 | #define snd_soc_8_16_spi_write NULL |
| 351 | #endif |
| 352 | |
Randy Dunlap | 17244c2 | 2009-08-10 16:04:39 -0700 | [diff] [blame] | 353 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 354 | static unsigned int do_i2c_read(struct snd_soc_codec *codec, |
| 355 | void *reg, int reglen, |
| 356 | void *data, int datalen) |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 357 | { |
| 358 | struct i2c_msg xfer[2]; |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 359 | int ret; |
| 360 | struct i2c_client *client = codec->control_data; |
| 361 | |
| 362 | /* Write register */ |
| 363 | xfer[0].addr = client->addr; |
| 364 | xfer[0].flags = 0; |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 365 | xfer[0].len = reglen; |
| 366 | xfer[0].buf = reg; |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 367 | |
| 368 | /* Read data */ |
| 369 | xfer[1].addr = client->addr; |
| 370 | xfer[1].flags = I2C_M_RD; |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 371 | xfer[1].len = datalen; |
| 372 | xfer[1].buf = data; |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 373 | |
| 374 | ret = i2c_transfer(client->adapter, xfer, 2); |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 375 | dev_err(&client->dev, "i2c_transfer() returned %d\n", ret); |
| 376 | if (ret == 2) |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 377 | return 0; |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 378 | else if (ret < 0) |
| 379 | return ret; |
| 380 | else |
| 381 | return -EIO; |
| 382 | } |
| 383 | #endif |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 384 | |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 385 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| 386 | static unsigned int snd_soc_8_8_read_i2c(struct snd_soc_codec *codec, |
| 387 | unsigned int r) |
| 388 | { |
| 389 | u8 reg = r; |
| 390 | u8 data; |
| 391 | int ret; |
| 392 | |
| 393 | ret = do_i2c_read(codec, ®, 1, &data, 1); |
| 394 | if (ret < 0) |
| 395 | return 0; |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 396 | return data; |
| 397 | } |
| 398 | #else |
| 399 | #define snd_soc_8_8_read_i2c NULL |
| 400 | #endif |
| 401 | |
| 402 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 403 | static unsigned int snd_soc_8_16_read_i2c(struct snd_soc_codec *codec, |
| 404 | unsigned int r) |
| 405 | { |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 406 | u8 reg = r; |
| 407 | u16 data; |
| 408 | int ret; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 409 | |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 410 | ret = do_i2c_read(codec, ®, 1, &data, 2); |
| 411 | if (ret < 0) |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 412 | return 0; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 413 | return (data >> 8) | ((data & 0xff) << 8); |
| 414 | } |
| 415 | #else |
| 416 | #define snd_soc_8_16_read_i2c NULL |
| 417 | #endif |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 418 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 419 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| 420 | static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec, |
| 421 | unsigned int r) |
| 422 | { |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 423 | u16 reg = r; |
| 424 | u8 data; |
| 425 | int ret; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 426 | |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 427 | ret = do_i2c_read(codec, ®, 2, &data, 1); |
| 428 | if (ret < 0) |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 429 | return 0; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 430 | return data; |
| 431 | } |
| 432 | #else |
| 433 | #define snd_soc_16_8_read_i2c NULL |
| 434 | #endif |
| 435 | |
| 436 | static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec, |
| 437 | unsigned int reg) |
| 438 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 439 | int ret; |
| 440 | unsigned int val; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 441 | |
| 442 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 443 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 444 | snd_soc_codec_volatile_register(codec, reg) || |
| 445 | codec->cache_bypass) { |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 446 | if (codec->cache_only) |
| 447 | return -1; |
| 448 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 449 | BUG_ON(!codec->hw_read); |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 450 | return codec->hw_read(codec, reg); |
| 451 | } |
| 452 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 453 | ret = snd_soc_cache_read(codec, reg, &val); |
| 454 | if (ret < 0) |
| 455 | return -1; |
| 456 | return val; |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg, |
| 460 | unsigned int value) |
| 461 | { |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 462 | u8 data[3]; |
| 463 | int ret; |
| 464 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 465 | data[0] = (reg >> 8) & 0xff; |
| 466 | data[1] = reg & 0xff; |
| 467 | data[2] = value; |
| 468 | |
| 469 | reg &= 0xff; |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 470 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 471 | reg < codec->driver->reg_cache_size && |
| 472 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 473 | ret = snd_soc_cache_write(codec, reg, value); |
| 474 | if (ret < 0) |
| 475 | return -1; |
| 476 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 477 | |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 478 | if (codec->cache_only) { |
| 479 | codec->cache_sync = 1; |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 480 | return 0; |
Mark Brown | a3032b4 | 2010-02-01 18:48:03 +0000 | [diff] [blame] | 481 | } |
Mark Brown | 8c961bc | 2010-02-01 18:46:10 +0000 | [diff] [blame] | 482 | |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 483 | ret = codec->hw_write(codec->control_data, data, 3); |
| 484 | if (ret == 3) |
| 485 | return 0; |
| 486 | if (ret < 0) |
| 487 | return ret; |
| 488 | else |
| 489 | return -EIO; |
| 490 | } |
| 491 | |
| 492 | #if defined(CONFIG_SPI_MASTER) |
| 493 | static int snd_soc_16_8_spi_write(void *control_data, const char *data, |
| 494 | int len) |
| 495 | { |
| 496 | struct spi_device *spi = control_data; |
| 497 | struct spi_transfer t; |
| 498 | struct spi_message m; |
| 499 | u8 msg[3]; |
| 500 | |
| 501 | if (len <= 0) |
| 502 | return 0; |
| 503 | |
| 504 | msg[0] = data[0]; |
| 505 | msg[1] = data[1]; |
| 506 | msg[2] = data[2]; |
| 507 | |
| 508 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 509 | memset(&t, 0, sizeof t); |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 510 | |
| 511 | t.tx_buf = &msg[0]; |
| 512 | t.len = len; |
| 513 | |
| 514 | spi_message_add_tail(&t, &m); |
| 515 | spi_sync(spi, &m); |
| 516 | |
| 517 | return len; |
| 518 | } |
| 519 | #else |
| 520 | #define snd_soc_16_8_spi_write NULL |
| 521 | #endif |
| 522 | |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 523 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| 524 | static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec, |
| 525 | unsigned int r) |
| 526 | { |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 527 | u16 reg = cpu_to_be16(r); |
| 528 | u16 data; |
| 529 | int ret; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 530 | |
Dimitris Papastamos | f3594f5 | 2011-03-22 10:37:01 +0000 | [diff] [blame^] | 531 | ret = do_i2c_read(codec, ®, 2, &data, 2); |
| 532 | if (ret < 0) |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 533 | return 0; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 534 | return be16_to_cpu(data); |
| 535 | } |
| 536 | #else |
| 537 | #define snd_soc_16_16_read_i2c NULL |
| 538 | #endif |
| 539 | |
| 540 | static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec, |
| 541 | unsigned int reg) |
| 542 | { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 543 | int ret; |
| 544 | unsigned int val; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 545 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 546 | if (reg >= codec->driver->reg_cache_size || |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 547 | snd_soc_codec_volatile_register(codec, reg) || |
| 548 | codec->cache_bypass) { |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 549 | if (codec->cache_only) |
Dimitris Papastamos | 391d8a0 | 2010-09-21 17:04:07 +0100 | [diff] [blame] | 550 | return -1; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 551 | |
Dimitris Papastamos | 5aaa062 | 2010-11-08 15:37:07 +0000 | [diff] [blame] | 552 | BUG_ON(!codec->hw_read); |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 553 | return codec->hw_read(codec, reg); |
| 554 | } |
| 555 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 556 | ret = snd_soc_cache_read(codec, reg, &val); |
| 557 | if (ret < 0) |
| 558 | return -1; |
| 559 | |
| 560 | return val; |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg, |
| 564 | unsigned int value) |
| 565 | { |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 566 | u8 data[4]; |
| 567 | int ret; |
| 568 | |
| 569 | data[0] = (reg >> 8) & 0xff; |
| 570 | data[1] = reg & 0xff; |
| 571 | data[2] = (value >> 8) & 0xff; |
| 572 | data[3] = value & 0xff; |
| 573 | |
Dimitris Papastamos | db49c14 | 2010-09-22 13:25:47 +0100 | [diff] [blame] | 574 | if (!snd_soc_codec_volatile_register(codec, reg) && |
Dimitris Papastamos | dad8e7a | 2011-01-19 14:53:36 +0000 | [diff] [blame] | 575 | reg < codec->driver->reg_cache_size && |
| 576 | !codec->cache_bypass) { |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 577 | ret = snd_soc_cache_write(codec, reg, value); |
| 578 | if (ret < 0) |
| 579 | return -1; |
| 580 | } |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 581 | |
| 582 | if (codec->cache_only) { |
| 583 | codec->cache_sync = 1; |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | ret = codec->hw_write(codec->control_data, data, 4); |
| 588 | if (ret == 4) |
| 589 | return 0; |
| 590 | if (ret < 0) |
| 591 | return ret; |
| 592 | else |
| 593 | return -EIO; |
| 594 | } |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 595 | |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 596 | #if defined(CONFIG_SPI_MASTER) |
| 597 | static int snd_soc_16_16_spi_write(void *control_data, const char *data, |
| 598 | int len) |
| 599 | { |
| 600 | struct spi_device *spi = control_data; |
| 601 | struct spi_transfer t; |
| 602 | struct spi_message m; |
| 603 | u8 msg[4]; |
| 604 | |
| 605 | if (len <= 0) |
| 606 | return 0; |
| 607 | |
| 608 | msg[0] = data[0]; |
| 609 | msg[1] = data[1]; |
| 610 | msg[2] = data[2]; |
| 611 | msg[3] = data[3]; |
| 612 | |
| 613 | spi_message_init(&m); |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 614 | memset(&t, 0, sizeof t); |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 615 | |
| 616 | t.tx_buf = &msg[0]; |
| 617 | t.len = len; |
| 618 | |
| 619 | spi_message_add_tail(&t, &m); |
| 620 | spi_sync(spi, &m); |
| 621 | |
| 622 | return len; |
| 623 | } |
| 624 | #else |
| 625 | #define snd_soc_16_16_spi_write NULL |
| 626 | #endif |
| 627 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 628 | static struct { |
| 629 | int addr_bits; |
| 630 | int data_bits; |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 631 | int (*write)(struct snd_soc_codec *codec, unsigned int, unsigned int); |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 632 | int (*spi_write)(void *, const char *, int); |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 633 | unsigned int (*read)(struct snd_soc_codec *, unsigned int); |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 634 | unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int); |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 635 | } io_types[] = { |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 636 | { |
Barry Song | 63b62ab | 2010-01-27 11:46:17 +0800 | [diff] [blame] | 637 | .addr_bits = 4, .data_bits = 12, |
| 638 | .write = snd_soc_4_12_write, .read = snd_soc_4_12_read, |
| 639 | .spi_write = snd_soc_4_12_spi_write, |
| 640 | }, |
| 641 | { |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 642 | .addr_bits = 7, .data_bits = 9, |
| 643 | .write = snd_soc_7_9_write, .read = snd_soc_7_9_read, |
Barry Song | 8998c89 | 2009-12-31 10:30:34 +0800 | [diff] [blame] | 644 | .spi_write = snd_soc_7_9_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 645 | }, |
| 646 | { |
| 647 | .addr_bits = 8, .data_bits = 8, |
| 648 | .write = snd_soc_8_8_write, .read = snd_soc_8_8_read, |
Cliff Cai | 85dfcdf | 2010-03-18 16:17:00 +0800 | [diff] [blame] | 649 | .i2c_read = snd_soc_8_8_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 650 | .spi_write = snd_soc_8_8_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 651 | }, |
| 652 | { |
| 653 | .addr_bits = 8, .data_bits = 16, |
| 654 | .write = snd_soc_8_16_write, .read = snd_soc_8_16_read, |
| 655 | .i2c_read = snd_soc_8_16_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 656 | .spi_write = snd_soc_8_16_spi_write, |
Mark Brown | d62ab35 | 2009-09-21 04:21:47 -0700 | [diff] [blame] | 657 | }, |
Barry Song | 994dc42 | 2010-01-27 11:46:18 +0800 | [diff] [blame] | 658 | { |
| 659 | .addr_bits = 16, .data_bits = 8, |
| 660 | .write = snd_soc_16_8_write, .read = snd_soc_16_8_read, |
| 661 | .i2c_read = snd_soc_16_8_read_i2c, |
| 662 | .spi_write = snd_soc_16_8_spi_write, |
| 663 | }, |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 664 | { |
| 665 | .addr_bits = 16, .data_bits = 16, |
| 666 | .write = snd_soc_16_16_write, .read = snd_soc_16_16_read, |
| 667 | .i2c_read = snd_soc_16_16_read_i2c, |
Dimitris Papastamos | f479fd9 | 2010-10-04 11:25:13 +0100 | [diff] [blame] | 668 | .spi_write = snd_soc_16_16_spi_write, |
Mark Brown | bc6552f | 2010-03-05 16:27:15 +0000 | [diff] [blame] | 669 | }, |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 670 | }; |
| 671 | |
| 672 | /** |
| 673 | * snd_soc_codec_set_cache_io: Set up standard I/O functions. |
| 674 | * |
| 675 | * @codec: CODEC to configure. |
| 676 | * @type: Type of cache. |
| 677 | * @addr_bits: Number of bits of register address data. |
| 678 | * @data_bits: Number of bits of data per register. |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 679 | * @control: Control bus used. |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 680 | * |
| 681 | * Register formats are frequently shared between many I2C and SPI |
| 682 | * devices. In order to promote code reuse the ASoC core provides |
| 683 | * some standard implementations of CODEC read and write operations |
| 684 | * which can be set up using this function. |
| 685 | * |
| 686 | * The caller is responsible for allocating and initialising the |
| 687 | * actual cache. |
| 688 | * |
| 689 | * Note that at present this code cannot be used by CODECs with |
| 690 | * volatile registers. |
| 691 | */ |
| 692 | int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 693 | int addr_bits, int data_bits, |
| 694 | enum snd_soc_control_type control) |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 695 | { |
| 696 | int i; |
| 697 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 698 | for (i = 0; i < ARRAY_SIZE(io_types); i++) |
| 699 | if (io_types[i].addr_bits == addr_bits && |
| 700 | io_types[i].data_bits == data_bits) |
| 701 | break; |
| 702 | if (i == ARRAY_SIZE(io_types)) { |
| 703 | printk(KERN_ERR |
| 704 | "No I/O functions for %d bit address %d bit data\n", |
| 705 | addr_bits, data_bits); |
| 706 | return -EINVAL; |
| 707 | } |
| 708 | |
Mark Brown | c3acec2 | 2010-12-02 16:15:29 +0000 | [diff] [blame] | 709 | codec->write = io_types[i].write; |
| 710 | codec->read = io_types[i].read; |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 711 | |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 712 | switch (control) { |
| 713 | case SND_SOC_CUSTOM: |
| 714 | break; |
| 715 | |
| 716 | case SND_SOC_I2C: |
Randy Dunlap | 17244c2 | 2009-08-10 16:04:39 -0700 | [diff] [blame] | 717 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 718 | codec->hw_write = (hw_write_t)i2c_master_send; |
| 719 | #endif |
Mark Brown | afa2f10 | 2009-07-10 23:11:24 +0100 | [diff] [blame] | 720 | if (io_types[i].i2c_read) |
| 721 | codec->hw_read = io_types[i].i2c_read; |
Mark Brown | a6d1434 | 2010-08-12 10:59:15 +0100 | [diff] [blame] | 722 | |
| 723 | codec->control_data = container_of(codec->dev, |
| 724 | struct i2c_client, |
| 725 | dev); |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 726 | break; |
| 727 | |
| 728 | case SND_SOC_SPI: |
Mark Brown | 27ded04 | 2009-07-10 23:28:16 +0100 | [diff] [blame] | 729 | if (io_types[i].spi_write) |
| 730 | codec->hw_write = io_types[i].spi_write; |
Mark Brown | a6d1434 | 2010-08-12 10:59:15 +0100 | [diff] [blame] | 731 | |
| 732 | codec->control_data = container_of(codec->dev, |
| 733 | struct spi_device, |
| 734 | dev); |
Mark Brown | 7084a42 | 2009-07-10 22:24:27 +0100 | [diff] [blame] | 735 | break; |
| 736 | } |
| 737 | |
Mark Brown | 17a52fd | 2009-07-05 17:24:50 +0100 | [diff] [blame] | 738 | return 0; |
| 739 | } |
| 740 | EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 741 | |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 742 | static bool snd_soc_set_cache_val(void *base, unsigned int idx, |
| 743 | unsigned int val, unsigned int word_size) |
| 744 | { |
| 745 | switch (word_size) { |
| 746 | case 1: { |
| 747 | u8 *cache = base; |
| 748 | if (cache[idx] == val) |
| 749 | return true; |
| 750 | cache[idx] = val; |
| 751 | break; |
| 752 | } |
| 753 | case 2: { |
| 754 | u16 *cache = base; |
| 755 | if (cache[idx] == val) |
| 756 | return true; |
| 757 | cache[idx] = val; |
| 758 | break; |
| 759 | } |
| 760 | default: |
| 761 | BUG(); |
| 762 | } |
| 763 | return false; |
| 764 | } |
| 765 | |
| 766 | static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx, |
| 767 | unsigned int word_size) |
| 768 | { |
| 769 | switch (word_size) { |
| 770 | case 1: { |
| 771 | const u8 *cache = base; |
| 772 | return cache[idx]; |
| 773 | } |
| 774 | case 2: { |
| 775 | const u16 *cache = base; |
| 776 | return cache[idx]; |
| 777 | } |
| 778 | default: |
| 779 | BUG(); |
| 780 | } |
| 781 | /* unreachable */ |
| 782 | return -1; |
| 783 | } |
| 784 | |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 785 | struct snd_soc_rbtree_node { |
| 786 | struct rb_node node; |
| 787 | unsigned int reg; |
| 788 | unsigned int value; |
| 789 | unsigned int defval; |
| 790 | } __attribute__ ((packed)); |
| 791 | |
| 792 | struct snd_soc_rbtree_ctx { |
| 793 | struct rb_root root; |
| 794 | }; |
| 795 | |
| 796 | static struct snd_soc_rbtree_node *snd_soc_rbtree_lookup( |
| 797 | struct rb_root *root, unsigned int reg) |
| 798 | { |
| 799 | struct rb_node *node; |
| 800 | struct snd_soc_rbtree_node *rbnode; |
| 801 | |
| 802 | node = root->rb_node; |
| 803 | while (node) { |
| 804 | rbnode = container_of(node, struct snd_soc_rbtree_node, node); |
| 805 | if (rbnode->reg < reg) |
| 806 | node = node->rb_left; |
| 807 | else if (rbnode->reg > reg) |
| 808 | node = node->rb_right; |
| 809 | else |
| 810 | return rbnode; |
| 811 | } |
| 812 | |
| 813 | return NULL; |
| 814 | } |
| 815 | |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 816 | static int snd_soc_rbtree_insert(struct rb_root *root, |
| 817 | struct snd_soc_rbtree_node *rbnode) |
| 818 | { |
| 819 | struct rb_node **new, *parent; |
| 820 | struct snd_soc_rbtree_node *rbnode_tmp; |
| 821 | |
| 822 | parent = NULL; |
| 823 | new = &root->rb_node; |
| 824 | while (*new) { |
| 825 | rbnode_tmp = container_of(*new, struct snd_soc_rbtree_node, |
| 826 | node); |
| 827 | parent = *new; |
| 828 | if (rbnode_tmp->reg < rbnode->reg) |
| 829 | new = &((*new)->rb_left); |
| 830 | else if (rbnode_tmp->reg > rbnode->reg) |
| 831 | new = &((*new)->rb_right); |
| 832 | else |
| 833 | return 0; |
| 834 | } |
| 835 | |
| 836 | /* insert the node into the rbtree */ |
| 837 | rb_link_node(&rbnode->node, parent, new); |
| 838 | rb_insert_color(&rbnode->node, root); |
| 839 | |
| 840 | return 1; |
| 841 | } |
| 842 | |
| 843 | static int snd_soc_rbtree_cache_sync(struct snd_soc_codec *codec) |
| 844 | { |
| 845 | struct snd_soc_rbtree_ctx *rbtree_ctx; |
| 846 | struct rb_node *node; |
| 847 | struct snd_soc_rbtree_node *rbnode; |
| 848 | unsigned int val; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 849 | int ret; |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 850 | |
| 851 | rbtree_ctx = codec->reg_cache; |
| 852 | for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) { |
| 853 | rbnode = rb_entry(node, struct snd_soc_rbtree_node, node); |
| 854 | if (rbnode->value == rbnode->defval) |
| 855 | continue; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 856 | ret = snd_soc_cache_read(codec, rbnode->reg, &val); |
| 857 | if (ret) |
| 858 | return ret; |
Dimitris Papastamos | 9978007 | 2011-01-19 14:53:37 +0000 | [diff] [blame] | 859 | codec->cache_bypass = 1; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 860 | ret = snd_soc_write(codec, rbnode->reg, val); |
Dimitris Papastamos | 9978007 | 2011-01-19 14:53:37 +0000 | [diff] [blame] | 861 | codec->cache_bypass = 0; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 862 | if (ret) |
| 863 | return ret; |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 864 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
| 865 | rbnode->reg, val); |
| 866 | } |
| 867 | |
| 868 | return 0; |
| 869 | } |
| 870 | |
| 871 | static int snd_soc_rbtree_cache_write(struct snd_soc_codec *codec, |
| 872 | unsigned int reg, unsigned int value) |
| 873 | { |
| 874 | struct snd_soc_rbtree_ctx *rbtree_ctx; |
| 875 | struct snd_soc_rbtree_node *rbnode; |
| 876 | |
| 877 | rbtree_ctx = codec->reg_cache; |
| 878 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); |
| 879 | if (rbnode) { |
| 880 | if (rbnode->value == value) |
| 881 | return 0; |
| 882 | rbnode->value = value; |
| 883 | } else { |
| 884 | /* bail out early, no need to create the rbnode yet */ |
| 885 | if (!value) |
| 886 | return 0; |
| 887 | /* |
| 888 | * for uninitialized registers whose value is changed |
| 889 | * from the default zero, create an rbnode and insert |
| 890 | * it into the tree. |
| 891 | */ |
| 892 | rbnode = kzalloc(sizeof *rbnode, GFP_KERNEL); |
| 893 | if (!rbnode) |
| 894 | return -ENOMEM; |
| 895 | rbnode->reg = reg; |
| 896 | rbnode->value = value; |
| 897 | snd_soc_rbtree_insert(&rbtree_ctx->root, rbnode); |
| 898 | } |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | static int snd_soc_rbtree_cache_read(struct snd_soc_codec *codec, |
| 904 | unsigned int reg, unsigned int *value) |
| 905 | { |
| 906 | struct snd_soc_rbtree_ctx *rbtree_ctx; |
| 907 | struct snd_soc_rbtree_node *rbnode; |
| 908 | |
| 909 | rbtree_ctx = codec->reg_cache; |
| 910 | rbnode = snd_soc_rbtree_lookup(&rbtree_ctx->root, reg); |
| 911 | if (rbnode) { |
| 912 | *value = rbnode->value; |
| 913 | } else { |
| 914 | /* uninitialized registers default to 0 */ |
| 915 | *value = 0; |
| 916 | } |
| 917 | |
| 918 | return 0; |
| 919 | } |
| 920 | |
| 921 | static int snd_soc_rbtree_cache_exit(struct snd_soc_codec *codec) |
| 922 | { |
| 923 | struct rb_node *next; |
| 924 | struct snd_soc_rbtree_ctx *rbtree_ctx; |
| 925 | struct snd_soc_rbtree_node *rbtree_node; |
| 926 | |
| 927 | /* if we've already been called then just return */ |
| 928 | rbtree_ctx = codec->reg_cache; |
| 929 | if (!rbtree_ctx) |
| 930 | return 0; |
| 931 | |
| 932 | /* free up the rbtree */ |
| 933 | next = rb_first(&rbtree_ctx->root); |
| 934 | while (next) { |
| 935 | rbtree_node = rb_entry(next, struct snd_soc_rbtree_node, node); |
| 936 | next = rb_next(&rbtree_node->node); |
| 937 | rb_erase(&rbtree_node->node, &rbtree_ctx->root); |
| 938 | kfree(rbtree_node); |
| 939 | } |
| 940 | |
| 941 | /* release the resources */ |
| 942 | kfree(codec->reg_cache); |
| 943 | codec->reg_cache = NULL; |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | static int snd_soc_rbtree_cache_init(struct snd_soc_codec *codec) |
| 949 | { |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 950 | struct snd_soc_rbtree_node *rbtree_node; |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 951 | struct snd_soc_rbtree_ctx *rbtree_ctx; |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 952 | unsigned int val; |
| 953 | unsigned int word_size; |
| 954 | int i; |
| 955 | int ret; |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 956 | |
| 957 | codec->reg_cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL); |
| 958 | if (!codec->reg_cache) |
| 959 | return -ENOMEM; |
| 960 | |
| 961 | rbtree_ctx = codec->reg_cache; |
| 962 | rbtree_ctx->root = RB_ROOT; |
| 963 | |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 964 | if (!codec->reg_def_copy) |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 965 | return 0; |
| 966 | |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 967 | /* |
| 968 | * populate the rbtree with the initialized registers. All other |
| 969 | * registers will be inserted when they are first modified. |
| 970 | */ |
| 971 | word_size = codec->driver->reg_word_size; |
| 972 | for (i = 0; i < codec->driver->reg_cache_size; ++i) { |
| 973 | val = snd_soc_get_cache_val(codec->reg_def_copy, i, word_size); |
| 974 | if (!val) |
| 975 | continue; |
| 976 | rbtree_node = kzalloc(sizeof *rbtree_node, GFP_KERNEL); |
| 977 | if (!rbtree_node) { |
| 978 | ret = -ENOMEM; |
| 979 | snd_soc_cache_exit(codec); |
| 980 | break; |
| 981 | } |
| 982 | rbtree_node->reg = i; |
| 983 | rbtree_node->value = val; |
| 984 | rbtree_node->defval = val; |
| 985 | snd_soc_rbtree_insert(&rbtree_ctx->root, rbtree_node); |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
Mark Brown | 68d44ee | 2010-12-21 17:19:56 +0000 | [diff] [blame] | 991 | #ifdef CONFIG_SND_SOC_CACHE_LZO |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 992 | struct snd_soc_lzo_ctx { |
| 993 | void *wmem; |
| 994 | void *dst; |
| 995 | const void *src; |
| 996 | size_t src_len; |
| 997 | size_t dst_len; |
| 998 | size_t decompressed_size; |
| 999 | unsigned long *sync_bmp; |
| 1000 | int sync_bmp_nbits; |
| 1001 | }; |
| 1002 | |
| 1003 | #define LZO_BLOCK_NUM 8 |
| 1004 | static int snd_soc_lzo_block_count(void) |
| 1005 | { |
| 1006 | return LZO_BLOCK_NUM; |
| 1007 | } |
| 1008 | |
| 1009 | static int snd_soc_lzo_prepare(struct snd_soc_lzo_ctx *lzo_ctx) |
| 1010 | { |
| 1011 | lzo_ctx->wmem = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); |
| 1012 | if (!lzo_ctx->wmem) |
| 1013 | return -ENOMEM; |
| 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | static int snd_soc_lzo_compress(struct snd_soc_lzo_ctx *lzo_ctx) |
| 1018 | { |
| 1019 | size_t compress_size; |
| 1020 | int ret; |
| 1021 | |
| 1022 | ret = lzo1x_1_compress(lzo_ctx->src, lzo_ctx->src_len, |
| 1023 | lzo_ctx->dst, &compress_size, lzo_ctx->wmem); |
| 1024 | if (ret != LZO_E_OK || compress_size > lzo_ctx->dst_len) |
| 1025 | return -EINVAL; |
| 1026 | lzo_ctx->dst_len = compress_size; |
| 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | static int snd_soc_lzo_decompress(struct snd_soc_lzo_ctx *lzo_ctx) |
| 1031 | { |
| 1032 | size_t dst_len; |
| 1033 | int ret; |
| 1034 | |
| 1035 | dst_len = lzo_ctx->dst_len; |
| 1036 | ret = lzo1x_decompress_safe(lzo_ctx->src, lzo_ctx->src_len, |
| 1037 | lzo_ctx->dst, &dst_len); |
| 1038 | if (ret != LZO_E_OK || dst_len != lzo_ctx->dst_len) |
| 1039 | return -EINVAL; |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
| 1043 | static int snd_soc_lzo_compress_cache_block(struct snd_soc_codec *codec, |
| 1044 | struct snd_soc_lzo_ctx *lzo_ctx) |
| 1045 | { |
| 1046 | int ret; |
| 1047 | |
| 1048 | lzo_ctx->dst_len = lzo1x_worst_compress(PAGE_SIZE); |
| 1049 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); |
| 1050 | if (!lzo_ctx->dst) { |
| 1051 | lzo_ctx->dst_len = 0; |
| 1052 | return -ENOMEM; |
| 1053 | } |
| 1054 | |
| 1055 | ret = snd_soc_lzo_compress(lzo_ctx); |
| 1056 | if (ret < 0) |
| 1057 | return ret; |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | static int snd_soc_lzo_decompress_cache_block(struct snd_soc_codec *codec, |
| 1062 | struct snd_soc_lzo_ctx *lzo_ctx) |
| 1063 | { |
| 1064 | int ret; |
| 1065 | |
| 1066 | lzo_ctx->dst_len = lzo_ctx->decompressed_size; |
| 1067 | lzo_ctx->dst = kmalloc(lzo_ctx->dst_len, GFP_KERNEL); |
| 1068 | if (!lzo_ctx->dst) { |
| 1069 | lzo_ctx->dst_len = 0; |
| 1070 | return -ENOMEM; |
| 1071 | } |
| 1072 | |
| 1073 | ret = snd_soc_lzo_decompress(lzo_ctx); |
| 1074 | if (ret < 0) |
| 1075 | return ret; |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec, |
| 1080 | unsigned int reg) |
| 1081 | { |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1082 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1083 | |
| 1084 | codec_drv = codec->driver; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1085 | return (reg * codec_drv->reg_word_size) / |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1086 | DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()); |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
| 1089 | static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec, |
| 1090 | unsigned int reg) |
| 1091 | { |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1092 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1093 | |
| 1094 | codec_drv = codec->driver; |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1095 | return reg % (DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()) / |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1096 | codec_drv->reg_word_size); |
| 1097 | } |
| 1098 | |
| 1099 | static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec) |
| 1100 | { |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1101 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1102 | |
| 1103 | codec_drv = codec->driver; |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1104 | return DIV_ROUND_UP(codec->reg_size, snd_soc_lzo_block_count()); |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | static int snd_soc_lzo_cache_sync(struct snd_soc_codec *codec) |
| 1108 | { |
| 1109 | struct snd_soc_lzo_ctx **lzo_blocks; |
| 1110 | unsigned int val; |
| 1111 | int i; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1112 | int ret; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1113 | |
| 1114 | lzo_blocks = codec->reg_cache; |
| 1115 | for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1116 | ret = snd_soc_cache_read(codec, i, &val); |
| 1117 | if (ret) |
| 1118 | return ret; |
Dimitris Papastamos | 9978007 | 2011-01-19 14:53:37 +0000 | [diff] [blame] | 1119 | codec->cache_bypass = 1; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1120 | ret = snd_soc_write(codec, i, val); |
Dimitris Papastamos | 9978007 | 2011-01-19 14:53:37 +0000 | [diff] [blame] | 1121 | codec->cache_bypass = 0; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1122 | if (ret) |
| 1123 | return ret; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1124 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
| 1125 | i, val); |
| 1126 | } |
| 1127 | |
| 1128 | return 0; |
| 1129 | } |
| 1130 | |
| 1131 | static int snd_soc_lzo_cache_write(struct snd_soc_codec *codec, |
| 1132 | unsigned int reg, unsigned int value) |
| 1133 | { |
| 1134 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; |
| 1135 | int ret, blkindex, blkpos; |
| 1136 | size_t blksize, tmp_dst_len; |
| 1137 | void *tmp_dst; |
| 1138 | |
| 1139 | /* index of the compressed lzo block */ |
| 1140 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); |
| 1141 | /* register index within the decompressed block */ |
| 1142 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); |
| 1143 | /* size of the compressed block */ |
| 1144 | blksize = snd_soc_lzo_get_blksize(codec); |
| 1145 | lzo_blocks = codec->reg_cache; |
| 1146 | lzo_block = lzo_blocks[blkindex]; |
| 1147 | |
| 1148 | /* save the pointer and length of the compressed block */ |
| 1149 | tmp_dst = lzo_block->dst; |
| 1150 | tmp_dst_len = lzo_block->dst_len; |
| 1151 | |
| 1152 | /* prepare the source to be the compressed block */ |
| 1153 | lzo_block->src = lzo_block->dst; |
| 1154 | lzo_block->src_len = lzo_block->dst_len; |
| 1155 | |
| 1156 | /* decompress the block */ |
| 1157 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); |
| 1158 | if (ret < 0) { |
| 1159 | kfree(lzo_block->dst); |
| 1160 | goto out; |
| 1161 | } |
| 1162 | |
| 1163 | /* write the new value to the cache */ |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1164 | if (snd_soc_set_cache_val(lzo_block->dst, blkpos, value, |
| 1165 | codec->driver->reg_word_size)) { |
| 1166 | kfree(lzo_block->dst); |
| 1167 | goto out; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1168 | } |
| 1169 | |
| 1170 | /* prepare the source to be the decompressed block */ |
| 1171 | lzo_block->src = lzo_block->dst; |
| 1172 | lzo_block->src_len = lzo_block->dst_len; |
| 1173 | |
| 1174 | /* compress the block */ |
| 1175 | ret = snd_soc_lzo_compress_cache_block(codec, lzo_block); |
| 1176 | if (ret < 0) { |
| 1177 | kfree(lzo_block->dst); |
| 1178 | kfree(lzo_block->src); |
| 1179 | goto out; |
| 1180 | } |
| 1181 | |
| 1182 | /* set the bit so we know we have to sync this register */ |
| 1183 | set_bit(reg, lzo_block->sync_bmp); |
| 1184 | kfree(tmp_dst); |
| 1185 | kfree(lzo_block->src); |
| 1186 | return 0; |
| 1187 | out: |
| 1188 | lzo_block->dst = tmp_dst; |
| 1189 | lzo_block->dst_len = tmp_dst_len; |
| 1190 | return ret; |
| 1191 | } |
| 1192 | |
| 1193 | static int snd_soc_lzo_cache_read(struct snd_soc_codec *codec, |
| 1194 | unsigned int reg, unsigned int *value) |
| 1195 | { |
| 1196 | struct snd_soc_lzo_ctx *lzo_block, **lzo_blocks; |
| 1197 | int ret, blkindex, blkpos; |
| 1198 | size_t blksize, tmp_dst_len; |
| 1199 | void *tmp_dst; |
| 1200 | |
| 1201 | *value = 0; |
| 1202 | /* index of the compressed lzo block */ |
| 1203 | blkindex = snd_soc_lzo_get_blkindex(codec, reg); |
| 1204 | /* register index within the decompressed block */ |
| 1205 | blkpos = snd_soc_lzo_get_blkpos(codec, reg); |
| 1206 | /* size of the compressed block */ |
| 1207 | blksize = snd_soc_lzo_get_blksize(codec); |
| 1208 | lzo_blocks = codec->reg_cache; |
| 1209 | lzo_block = lzo_blocks[blkindex]; |
| 1210 | |
| 1211 | /* save the pointer and length of the compressed block */ |
| 1212 | tmp_dst = lzo_block->dst; |
| 1213 | tmp_dst_len = lzo_block->dst_len; |
| 1214 | |
| 1215 | /* prepare the source to be the compressed block */ |
| 1216 | lzo_block->src = lzo_block->dst; |
| 1217 | lzo_block->src_len = lzo_block->dst_len; |
| 1218 | |
| 1219 | /* decompress the block */ |
| 1220 | ret = snd_soc_lzo_decompress_cache_block(codec, lzo_block); |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1221 | if (ret >= 0) |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1222 | /* fetch the value from the cache */ |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1223 | *value = snd_soc_get_cache_val(lzo_block->dst, blkpos, |
| 1224 | codec->driver->reg_word_size); |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1225 | |
| 1226 | kfree(lzo_block->dst); |
| 1227 | /* restore the pointer and length of the compressed block */ |
| 1228 | lzo_block->dst = tmp_dst; |
| 1229 | lzo_block->dst_len = tmp_dst_len; |
| 1230 | return 0; |
| 1231 | } |
| 1232 | |
| 1233 | static int snd_soc_lzo_cache_exit(struct snd_soc_codec *codec) |
| 1234 | { |
| 1235 | struct snd_soc_lzo_ctx **lzo_blocks; |
| 1236 | int i, blkcount; |
| 1237 | |
| 1238 | lzo_blocks = codec->reg_cache; |
| 1239 | if (!lzo_blocks) |
| 1240 | return 0; |
| 1241 | |
| 1242 | blkcount = snd_soc_lzo_block_count(); |
| 1243 | /* |
| 1244 | * the pointer to the bitmap used for syncing the cache |
| 1245 | * is shared amongst all lzo_blocks. Ensure it is freed |
| 1246 | * only once. |
| 1247 | */ |
| 1248 | if (lzo_blocks[0]) |
| 1249 | kfree(lzo_blocks[0]->sync_bmp); |
| 1250 | for (i = 0; i < blkcount; ++i) { |
| 1251 | if (lzo_blocks[i]) { |
| 1252 | kfree(lzo_blocks[i]->wmem); |
| 1253 | kfree(lzo_blocks[i]->dst); |
| 1254 | } |
| 1255 | /* each lzo_block is a pointer returned by kmalloc or NULL */ |
| 1256 | kfree(lzo_blocks[i]); |
| 1257 | } |
| 1258 | kfree(lzo_blocks); |
| 1259 | codec->reg_cache = NULL; |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec) |
| 1264 | { |
| 1265 | struct snd_soc_lzo_ctx **lzo_blocks; |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1266 | size_t bmp_size; |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1267 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1268 | int ret, tofree, i, blksize, blkcount; |
| 1269 | const char *p, *end; |
| 1270 | unsigned long *sync_bmp; |
| 1271 | |
| 1272 | ret = 0; |
| 1273 | codec_drv = codec->driver; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1274 | |
| 1275 | /* |
| 1276 | * If we have not been given a default register cache |
| 1277 | * then allocate a dummy zero-ed out region, compress it |
| 1278 | * and remember to free it afterwards. |
| 1279 | */ |
| 1280 | tofree = 0; |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1281 | if (!codec->reg_def_copy) |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1282 | tofree = 1; |
| 1283 | |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1284 | if (!codec->reg_def_copy) { |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1285 | codec->reg_def_copy = kzalloc(codec->reg_size, GFP_KERNEL); |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1286 | if (!codec->reg_def_copy) |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1287 | return -ENOMEM; |
| 1288 | } |
| 1289 | |
| 1290 | blkcount = snd_soc_lzo_block_count(); |
| 1291 | codec->reg_cache = kzalloc(blkcount * sizeof *lzo_blocks, |
| 1292 | GFP_KERNEL); |
| 1293 | if (!codec->reg_cache) { |
| 1294 | ret = -ENOMEM; |
| 1295 | goto err_tofree; |
| 1296 | } |
| 1297 | lzo_blocks = codec->reg_cache; |
| 1298 | |
| 1299 | /* |
| 1300 | * allocate a bitmap to be used when syncing the cache with |
| 1301 | * the hardware. Each time a register is modified, the corresponding |
| 1302 | * bit is set in the bitmap, so we know that we have to sync |
| 1303 | * that register. |
| 1304 | */ |
| 1305 | bmp_size = codec_drv->reg_cache_size; |
Dimitris Papastamos | 465d7fc | 2010-12-14 15:15:36 +0000 | [diff] [blame] | 1306 | sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof(long), |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1307 | GFP_KERNEL); |
| 1308 | if (!sync_bmp) { |
| 1309 | ret = -ENOMEM; |
| 1310 | goto err; |
| 1311 | } |
Dimitris Papastamos | 09c74a9 | 2010-11-29 11:43:33 +0000 | [diff] [blame] | 1312 | bitmap_zero(sync_bmp, bmp_size); |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1313 | |
| 1314 | /* allocate the lzo blocks and initialize them */ |
| 1315 | for (i = 0; i < blkcount; ++i) { |
| 1316 | lzo_blocks[i] = kzalloc(sizeof **lzo_blocks, |
| 1317 | GFP_KERNEL); |
| 1318 | if (!lzo_blocks[i]) { |
| 1319 | kfree(sync_bmp); |
| 1320 | ret = -ENOMEM; |
| 1321 | goto err; |
| 1322 | } |
| 1323 | lzo_blocks[i]->sync_bmp = sync_bmp; |
Dimitris Papastamos | 04f8fd1 | 2011-01-11 11:24:02 +0000 | [diff] [blame] | 1324 | lzo_blocks[i]->sync_bmp_nbits = bmp_size; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1325 | /* alloc the working space for the compressed block */ |
| 1326 | ret = snd_soc_lzo_prepare(lzo_blocks[i]); |
| 1327 | if (ret < 0) |
| 1328 | goto err; |
| 1329 | } |
| 1330 | |
| 1331 | blksize = snd_soc_lzo_get_blksize(codec); |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1332 | p = codec->reg_def_copy; |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1333 | end = codec->reg_def_copy + codec->reg_size; |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1334 | /* compress the register map and fill the lzo blocks */ |
| 1335 | for (i = 0; i < blkcount; ++i, p += blksize) { |
| 1336 | lzo_blocks[i]->src = p; |
| 1337 | if (p + blksize > end) |
| 1338 | lzo_blocks[i]->src_len = end - p; |
| 1339 | else |
| 1340 | lzo_blocks[i]->src_len = blksize; |
| 1341 | ret = snd_soc_lzo_compress_cache_block(codec, |
| 1342 | lzo_blocks[i]); |
| 1343 | if (ret < 0) |
| 1344 | goto err; |
| 1345 | lzo_blocks[i]->decompressed_size = |
| 1346 | lzo_blocks[i]->src_len; |
| 1347 | } |
| 1348 | |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1349 | if (tofree) { |
| 1350 | kfree(codec->reg_def_copy); |
| 1351 | codec->reg_def_copy = NULL; |
| 1352 | } |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1353 | return 0; |
| 1354 | err: |
| 1355 | snd_soc_cache_exit(codec); |
| 1356 | err_tofree: |
Dimitris Papastamos | 3335ddc | 2010-12-02 16:11:05 +0000 | [diff] [blame] | 1357 | if (tofree) { |
| 1358 | kfree(codec->reg_def_copy); |
| 1359 | codec->reg_def_copy = NULL; |
| 1360 | } |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1361 | return ret; |
| 1362 | } |
Mark Brown | 68d44ee | 2010-12-21 17:19:56 +0000 | [diff] [blame] | 1363 | #endif |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1364 | |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1365 | static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec) |
| 1366 | { |
| 1367 | int i; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1368 | int ret; |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1369 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1370 | unsigned int val; |
| 1371 | |
| 1372 | codec_drv = codec->driver; |
| 1373 | for (i = 0; i < codec_drv->reg_cache_size; ++i) { |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1374 | ret = snd_soc_cache_read(codec, i, &val); |
| 1375 | if (ret) |
| 1376 | return ret; |
Dimitris Papastamos | d779fce | 2011-01-12 10:22:28 +0000 | [diff] [blame] | 1377 | if (codec->reg_def_copy) |
| 1378 | if (snd_soc_get_cache_val(codec->reg_def_copy, |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1379 | i, codec_drv->reg_word_size) == val) |
| 1380 | continue; |
Dimitris Papastamos | 7a33d4c | 2010-11-29 10:24:54 +0000 | [diff] [blame] | 1381 | ret = snd_soc_write(codec, i, val); |
| 1382 | if (ret) |
| 1383 | return ret; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1384 | dev_dbg(codec->dev, "Synced register %#x, value = %#x\n", |
| 1385 | i, val); |
| 1386 | } |
| 1387 | return 0; |
| 1388 | } |
| 1389 | |
| 1390 | static int snd_soc_flat_cache_write(struct snd_soc_codec *codec, |
| 1391 | unsigned int reg, unsigned int value) |
| 1392 | { |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1393 | snd_soc_set_cache_val(codec->reg_cache, reg, value, |
| 1394 | codec->driver->reg_word_size); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1395 | return 0; |
| 1396 | } |
| 1397 | |
| 1398 | static int snd_soc_flat_cache_read(struct snd_soc_codec *codec, |
| 1399 | unsigned int reg, unsigned int *value) |
| 1400 | { |
Dimitris Papastamos | 1321e88 | 2011-01-11 11:29:49 +0000 | [diff] [blame] | 1401 | *value = snd_soc_get_cache_val(codec->reg_cache, reg, |
| 1402 | codec->driver->reg_word_size); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1403 | return 0; |
| 1404 | } |
| 1405 | |
| 1406 | static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec) |
| 1407 | { |
| 1408 | if (!codec->reg_cache) |
| 1409 | return 0; |
| 1410 | kfree(codec->reg_cache); |
| 1411 | codec->reg_cache = NULL; |
| 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | static int snd_soc_flat_cache_init(struct snd_soc_codec *codec) |
| 1416 | { |
Mark Brown | 001ae4c | 2010-12-02 16:21:08 +0000 | [diff] [blame] | 1417 | const struct snd_soc_codec_driver *codec_drv; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1418 | |
| 1419 | codec_drv = codec->driver; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1420 | |
Dimitris Papastamos | d779fce | 2011-01-12 10:22:28 +0000 | [diff] [blame] | 1421 | if (codec->reg_def_copy) |
| 1422 | codec->reg_cache = kmemdup(codec->reg_def_copy, |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1423 | codec->reg_size, GFP_KERNEL); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1424 | else |
Dimitris Papastamos | aea170a | 2011-01-12 10:38:58 +0000 | [diff] [blame] | 1425 | codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1426 | if (!codec->reg_cache) |
| 1427 | return -ENOMEM; |
| 1428 | |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
| 1432 | /* an array of all supported compression types */ |
| 1433 | static const struct snd_soc_cache_ops cache_types[] = { |
Mark Brown | be4fcdd | 2010-12-21 17:09:48 +0000 | [diff] [blame] | 1434 | /* Flat *must* be the first entry for fallback */ |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1435 | { |
Dimitris Papastamos | df0701b | 2010-11-29 10:54:28 +0000 | [diff] [blame] | 1436 | .id = SND_SOC_FLAT_COMPRESSION, |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1437 | .name = "flat", |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1438 | .init = snd_soc_flat_cache_init, |
| 1439 | .exit = snd_soc_flat_cache_exit, |
| 1440 | .read = snd_soc_flat_cache_read, |
| 1441 | .write = snd_soc_flat_cache_write, |
| 1442 | .sync = snd_soc_flat_cache_sync |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1443 | }, |
Mark Brown | 68d44ee | 2010-12-21 17:19:56 +0000 | [diff] [blame] | 1444 | #ifdef CONFIG_SND_SOC_CACHE_LZO |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1445 | { |
| 1446 | .id = SND_SOC_LZO_COMPRESSION, |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1447 | .name = "LZO", |
Dimitris Papastamos | cc28fb8 | 2010-11-11 10:04:58 +0000 | [diff] [blame] | 1448 | .init = snd_soc_lzo_cache_init, |
| 1449 | .exit = snd_soc_lzo_cache_exit, |
| 1450 | .read = snd_soc_lzo_cache_read, |
| 1451 | .write = snd_soc_lzo_cache_write, |
| 1452 | .sync = snd_soc_lzo_cache_sync |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 1453 | }, |
Mark Brown | 68d44ee | 2010-12-21 17:19:56 +0000 | [diff] [blame] | 1454 | #endif |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 1455 | { |
| 1456 | .id = SND_SOC_RBTREE_COMPRESSION, |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1457 | .name = "rbtree", |
Dimitris Papastamos | a7f387d | 2010-11-11 10:04:59 +0000 | [diff] [blame] | 1458 | .init = snd_soc_rbtree_cache_init, |
| 1459 | .exit = snd_soc_rbtree_cache_exit, |
| 1460 | .read = snd_soc_rbtree_cache_read, |
| 1461 | .write = snd_soc_rbtree_cache_write, |
| 1462 | .sync = snd_soc_rbtree_cache_sync |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1463 | } |
| 1464 | }; |
| 1465 | |
| 1466 | int snd_soc_cache_init(struct snd_soc_codec *codec) |
| 1467 | { |
| 1468 | int i; |
| 1469 | |
| 1470 | for (i = 0; i < ARRAY_SIZE(cache_types); ++i) |
Dimitris Papastamos | 23bbce3 | 2010-12-02 14:53:01 +0000 | [diff] [blame] | 1471 | if (cache_types[i].id == codec->compress_type) |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1472 | break; |
Mark Brown | be4fcdd | 2010-12-21 17:09:48 +0000 | [diff] [blame] | 1473 | |
| 1474 | /* Fall back to flat compression */ |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1475 | if (i == ARRAY_SIZE(cache_types)) { |
Mark Brown | be4fcdd | 2010-12-21 17:09:48 +0000 | [diff] [blame] | 1476 | dev_warn(codec->dev, "Could not match compress type: %d\n", |
| 1477 | codec->compress_type); |
| 1478 | i = 0; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1479 | } |
| 1480 | |
| 1481 | mutex_init(&codec->cache_rw_mutex); |
| 1482 | codec->cache_ops = &cache_types[i]; |
| 1483 | |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1484 | if (codec->cache_ops->init) { |
| 1485 | if (codec->cache_ops->name) |
| 1486 | dev_dbg(codec->dev, "Initializing %s cache for %s codec\n", |
| 1487 | codec->cache_ops->name, codec->name); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1488 | return codec->cache_ops->init(codec); |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1489 | } |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1490 | return -EINVAL; |
| 1491 | } |
| 1492 | |
| 1493 | /* |
| 1494 | * NOTE: keep in mind that this function might be called |
| 1495 | * multiple times. |
| 1496 | */ |
| 1497 | int snd_soc_cache_exit(struct snd_soc_codec *codec) |
| 1498 | { |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1499 | if (codec->cache_ops && codec->cache_ops->exit) { |
| 1500 | if (codec->cache_ops->name) |
| 1501 | dev_dbg(codec->dev, "Destroying %s cache for %s codec\n", |
| 1502 | codec->cache_ops->name, codec->name); |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1503 | return codec->cache_ops->exit(codec); |
Dimitris Papastamos | 0d735ea | 2010-12-06 09:51:57 +0000 | [diff] [blame] | 1504 | } |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1505 | return -EINVAL; |
| 1506 | } |
| 1507 | |
| 1508 | /** |
| 1509 | * snd_soc_cache_read: Fetch the value of a given register from the cache. |
| 1510 | * |
| 1511 | * @codec: CODEC to configure. |
| 1512 | * @reg: The register index. |
| 1513 | * @value: The value to be returned. |
| 1514 | */ |
| 1515 | int snd_soc_cache_read(struct snd_soc_codec *codec, |
| 1516 | unsigned int reg, unsigned int *value) |
| 1517 | { |
| 1518 | int ret; |
| 1519 | |
| 1520 | mutex_lock(&codec->cache_rw_mutex); |
| 1521 | |
| 1522 | if (value && codec->cache_ops && codec->cache_ops->read) { |
| 1523 | ret = codec->cache_ops->read(codec, reg, value); |
| 1524 | mutex_unlock(&codec->cache_rw_mutex); |
| 1525 | return ret; |
| 1526 | } |
| 1527 | |
| 1528 | mutex_unlock(&codec->cache_rw_mutex); |
| 1529 | return -EINVAL; |
| 1530 | } |
| 1531 | EXPORT_SYMBOL_GPL(snd_soc_cache_read); |
| 1532 | |
| 1533 | /** |
| 1534 | * snd_soc_cache_write: Set the value of a given register in the cache. |
| 1535 | * |
| 1536 | * @codec: CODEC to configure. |
| 1537 | * @reg: The register index. |
| 1538 | * @value: The new register value. |
| 1539 | */ |
| 1540 | int snd_soc_cache_write(struct snd_soc_codec *codec, |
| 1541 | unsigned int reg, unsigned int value) |
| 1542 | { |
| 1543 | int ret; |
| 1544 | |
| 1545 | mutex_lock(&codec->cache_rw_mutex); |
| 1546 | |
| 1547 | if (codec->cache_ops && codec->cache_ops->write) { |
| 1548 | ret = codec->cache_ops->write(codec, reg, value); |
| 1549 | mutex_unlock(&codec->cache_rw_mutex); |
| 1550 | return ret; |
| 1551 | } |
| 1552 | |
| 1553 | mutex_unlock(&codec->cache_rw_mutex); |
| 1554 | return -EINVAL; |
| 1555 | } |
| 1556 | EXPORT_SYMBOL_GPL(snd_soc_cache_write); |
| 1557 | |
| 1558 | /** |
| 1559 | * snd_soc_cache_sync: Sync the register cache with the hardware. |
| 1560 | * |
| 1561 | * @codec: CODEC to configure. |
| 1562 | * |
| 1563 | * Any registers that should not be synced should be marked as |
| 1564 | * volatile. In general drivers can choose not to use the provided |
| 1565 | * syncing functionality if they so require. |
| 1566 | */ |
| 1567 | int snd_soc_cache_sync(struct snd_soc_codec *codec) |
| 1568 | { |
| 1569 | int ret; |
Dimitris Papastamos | c358e64 | 2011-01-21 15:29:02 +0000 | [diff] [blame] | 1570 | const char *name; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1571 | |
| 1572 | if (!codec->cache_sync) { |
| 1573 | return 0; |
| 1574 | } |
| 1575 | |
Dan Carpenter | 46fdaa3 | 2011-02-07 22:01:41 +0300 | [diff] [blame] | 1576 | if (!codec->cache_ops || !codec->cache_ops->sync) |
| 1577 | return -EINVAL; |
| 1578 | |
Dimitris Papastamos | c358e64 | 2011-01-21 15:29:02 +0000 | [diff] [blame] | 1579 | if (codec->cache_ops->name) |
| 1580 | name = codec->cache_ops->name; |
| 1581 | else |
| 1582 | name = "unknown"; |
| 1583 | |
Dan Carpenter | 46fdaa3 | 2011-02-07 22:01:41 +0300 | [diff] [blame] | 1584 | if (codec->cache_ops->name) |
| 1585 | dev_dbg(codec->dev, "Syncing %s cache for %s codec\n", |
| 1586 | codec->cache_ops->name, codec->name); |
| 1587 | trace_snd_soc_cache_sync(codec, name, "start"); |
| 1588 | ret = codec->cache_ops->sync(codec); |
| 1589 | if (!ret) |
| 1590 | codec->cache_sync = 0; |
| 1591 | trace_snd_soc_cache_sync(codec, name, "end"); |
| 1592 | return ret; |
Dimitris Papastamos | 7a30a3d | 2010-11-11 10:04:57 +0000 | [diff] [blame] | 1593 | } |
| 1594 | EXPORT_SYMBOL_GPL(snd_soc_cache_sync); |
Dimitris Papastamos | 066d16c | 2011-01-13 12:20:36 +0000 | [diff] [blame] | 1595 | |
| 1596 | static int snd_soc_get_reg_access_index(struct snd_soc_codec *codec, |
| 1597 | unsigned int reg) |
| 1598 | { |
| 1599 | const struct snd_soc_codec_driver *codec_drv; |
| 1600 | unsigned int min, max, index; |
| 1601 | |
| 1602 | codec_drv = codec->driver; |
| 1603 | min = 0; |
| 1604 | max = codec_drv->reg_access_size - 1; |
| 1605 | do { |
| 1606 | index = (min + max) / 2; |
| 1607 | if (codec_drv->reg_access_default[index].reg == reg) |
| 1608 | return index; |
| 1609 | if (codec_drv->reg_access_default[index].reg < reg) |
| 1610 | min = index + 1; |
| 1611 | else |
| 1612 | max = index; |
| 1613 | } while (min <= max); |
| 1614 | return -1; |
| 1615 | } |
| 1616 | |
| 1617 | int snd_soc_default_volatile_register(struct snd_soc_codec *codec, |
| 1618 | unsigned int reg) |
| 1619 | { |
| 1620 | int index; |
| 1621 | |
| 1622 | if (reg >= codec->driver->reg_cache_size) |
| 1623 | return 1; |
| 1624 | index = snd_soc_get_reg_access_index(codec, reg); |
| 1625 | if (index < 0) |
| 1626 | return 0; |
| 1627 | return codec->driver->reg_access_default[index].vol; |
| 1628 | } |
| 1629 | EXPORT_SYMBOL_GPL(snd_soc_default_volatile_register); |
| 1630 | |
| 1631 | int snd_soc_default_readable_register(struct snd_soc_codec *codec, |
| 1632 | unsigned int reg) |
| 1633 | { |
| 1634 | int index; |
| 1635 | |
| 1636 | if (reg >= codec->driver->reg_cache_size) |
| 1637 | return 1; |
| 1638 | index = snd_soc_get_reg_access_index(codec, reg); |
| 1639 | if (index < 0) |
| 1640 | return 0; |
| 1641 | return codec->driver->reg_access_default[index].read; |
| 1642 | } |
| 1643 | EXPORT_SYMBOL_GPL(snd_soc_default_readable_register); |