1 /* 2 * cs4349.c -- CS4349 ALSA Soc Audio driver 3 * 4 * Copyright 2015 Cirrus Logic, Inc. 5 * 6 * Authors: Tim Howe <Tim.Howe@cirrus.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/delay.h> 18 #include <linux/gpio.h> 19 #include <linux/gpio/consumer.h> 20 #include <linux/platform_device.h> 21 #include <linux/pm.h> 22 #include <linux/i2c.h> 23 #include <linux/of_device.h> 24 #include <linux/regmap.h> 25 #include <linux/slab.h> 26 #include <sound/core.h> 27 #include <sound/pcm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/soc.h> 30 #include <sound/soc-dapm.h> 31 #include <sound/initval.h> 32 #include <sound/tlv.h> 33 #include "cs4349.h" 34 35 36 static const struct reg_default cs4349_reg_defaults[] = { 37 { 2, 0x00 }, /* r02 - Mode Control */ 38 { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */ 39 { 4, 0x81 }, /* r04 - Mute Control */ 40 { 5, 0x00 }, /* r05 - Channel A Volume Control */ 41 { 6, 0x00 }, /* r06 - Channel B Volume Control */ 42 { 7, 0xB1 }, /* r07 - Ramp and Filter Control */ 43 { 8, 0x1C }, /* r08 - Misc. Control */ 44 }; 45 46 /* Private data for the CS4349 */ 47 struct cs4349_private { 48 struct regmap *regmap; 49 struct gpio_desc *reset_gpio; 50 unsigned int mode; 51 int rate; 52 }; 53 54 static bool cs4349_readable_register(struct device *dev, unsigned int reg) 55 { 56 switch (reg) { 57 case CS4349_CHIPID ... CS4349_MISC: 58 return true; 59 default: 60 return false; 61 } 62 } 63 64 static bool cs4349_writeable_register(struct device *dev, unsigned int reg) 65 { 66 switch (reg) { 67 case CS4349_MODE ... CS4349_MISC: 68 return true; 69 default: 70 return false; 71 } 72 } 73 74 static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai, 75 unsigned int format) 76 { 77 struct snd_soc_codec *codec = codec_dai->codec; 78 struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec); 79 unsigned int fmt; 80 81 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK; 82 83 switch (fmt) { 84 case SND_SOC_DAIFMT_I2S: 85 case SND_SOC_DAIFMT_LEFT_J: 86 case SND_SOC_DAIFMT_RIGHT_J: 87 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK; 88 break; 89 default: 90 return -EINVAL; 91 } 92 93 return 0; 94 } 95 96 static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream, 97 struct snd_pcm_hw_params *params, 98 struct snd_soc_dai *dai) 99 { 100 struct snd_soc_codec *codec = dai->codec; 101 struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec); 102 int fmt, ret; 103 104 cs4349->rate = params_rate(params); 105 106 switch (cs4349->mode) { 107 case SND_SOC_DAIFMT_I2S: 108 fmt = DIF_I2S; 109 break; 110 case SND_SOC_DAIFMT_LEFT_J: 111 fmt = DIF_LEFT_JST; 112 break; 113 case SND_SOC_DAIFMT_RIGHT_J: 114 switch (params_width(params)) { 115 case 16: 116 fmt = DIF_RGHT_JST16; 117 break; 118 case 24: 119 fmt = DIF_RGHT_JST24; 120 break; 121 default: 122 return -EINVAL; 123 } 124 break; 125 default: 126 return -EINVAL; 127 } 128 129 ret = snd_soc_update_bits(codec, CS4349_MODE, DIF_MASK, 130 MODE_FORMAT(fmt)); 131 if (ret < 0) 132 return ret; 133 134 return 0; 135 } 136 137 static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute) 138 { 139 struct snd_soc_codec *codec = dai->codec; 140 int reg; 141 142 reg = 0; 143 if (mute) 144 reg = MUTE_AB_MASK; 145 146 return snd_soc_update_bits(codec, CS4349_MUTE, MUTE_AB_MASK, reg); 147 } 148 149 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0); 150 151 static const char * const chan_mix_texts[] = { 152 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB", 153 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL", 154 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono", 155 /*Normal == Channel A = Left, Channel B = Right*/ 156 }; 157 158 static const char * const fm_texts[] = { 159 "Auto", "Single", "Double", "Quad", 160 }; 161 162 static const char * const deemph_texts[] = { 163 "None", "44.1k", "48k", "32k", 164 }; 165 166 static const char * const softr_zeroc_texts[] = { 167 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC", 168 }; 169 170 static int deemph_values[] = { 171 0, 4, 8, 12, 172 }; 173 174 static int softr_zeroc_values[] = { 175 0, 64, 128, 192, 176 }; 177 178 static const struct soc_enum chan_mix_enum = 179 SOC_ENUM_SINGLE(CS4349_VMI, 0, 180 ARRAY_SIZE(chan_mix_texts), 181 chan_mix_texts); 182 183 static const struct soc_enum fm_mode_enum = 184 SOC_ENUM_SINGLE(CS4349_MODE, 0, 185 ARRAY_SIZE(fm_texts), 186 fm_texts); 187 188 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK, 189 deemph_texts, deemph_values); 190 191 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0, 192 SR_ZC_MASK, softr_zeroc_texts, 193 softr_zeroc_values); 194 195 static const struct snd_kcontrol_new cs4349_snd_controls[] = { 196 SOC_DOUBLE_R_TLV("Master Playback Volume", 197 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv), 198 SOC_ENUM("Functional Mode", fm_mode_enum), 199 SOC_ENUM("De-Emphasis Control", deemph_enum), 200 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum), 201 SOC_ENUM("Channel Mixer", chan_mix_enum), 202 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0), 203 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0), 204 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0), 205 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0), 206 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0), 207 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0), 208 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0), 209 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0), 210 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0), 211 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0), 212 }; 213 214 static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = { 215 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0), 216 217 SND_SOC_DAPM_OUTPUT("OutputA"), 218 SND_SOC_DAPM_OUTPUT("OutputB"), 219 }; 220 221 static const struct snd_soc_dapm_route cs4349_routes[] = { 222 {"DAC Playback", NULL, "OutputA"}, 223 {"DAC Playback", NULL, "OutputB"}, 224 225 {"OutputA", NULL, "HiFi DAC"}, 226 {"OutputB", NULL, "HiFi DAC"}, 227 }; 228 229 #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 230 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \ 231 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \ 232 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \ 233 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \ 234 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \ 235 SNDRV_PCM_FMTBIT_S32_LE) 236 237 #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000 238 239 static const struct snd_soc_dai_ops cs4349_dai_ops = { 240 .hw_params = cs4349_pcm_hw_params, 241 .set_fmt = cs4349_set_dai_fmt, 242 .digital_mute = cs4349_digital_mute, 243 }; 244 245 static struct snd_soc_dai_driver cs4349_dai = { 246 .name = "cs4349_hifi", 247 .playback = { 248 .stream_name = "DAC Playback", 249 .channels_min = 1, 250 .channels_max = 2, 251 .rates = CS4349_PCM_RATES, 252 .formats = CS4349_PCM_FORMATS, 253 }, 254 .ops = &cs4349_dai_ops, 255 .symmetric_rates = 1, 256 }; 257 258 static struct snd_soc_codec_driver soc_codec_dev_cs4349 = { 259 .controls = cs4349_snd_controls, 260 .num_controls = ARRAY_SIZE(cs4349_snd_controls), 261 262 .dapm_widgets = cs4349_dapm_widgets, 263 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets), 264 .dapm_routes = cs4349_routes, 265 .num_dapm_routes = ARRAY_SIZE(cs4349_routes), 266 }; 267 268 static const struct regmap_config cs4349_regmap = { 269 .reg_bits = 8, 270 .val_bits = 8, 271 272 .max_register = CS4349_MISC, 273 .reg_defaults = cs4349_reg_defaults, 274 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults), 275 .readable_reg = cs4349_readable_register, 276 .writeable_reg = cs4349_writeable_register, 277 .cache_type = REGCACHE_RBTREE, 278 }; 279 280 static int cs4349_i2c_probe(struct i2c_client *client, 281 const struct i2c_device_id *id) 282 { 283 struct cs4349_private *cs4349; 284 int ret; 285 286 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL); 287 if (!cs4349) 288 return -ENOMEM; 289 290 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap); 291 if (IS_ERR(cs4349->regmap)) { 292 ret = PTR_ERR(cs4349->regmap); 293 dev_err(&client->dev, "regmap_init() failed: %d\n", ret); 294 return ret; 295 } 296 297 /* Reset the Device */ 298 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev, 299 "reset", GPIOD_OUT_LOW); 300 if (IS_ERR(cs4349->reset_gpio)) 301 return PTR_ERR(cs4349->reset_gpio); 302 303 gpiod_set_value_cansleep(cs4349->reset_gpio, 1); 304 305 i2c_set_clientdata(client, cs4349); 306 307 return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4349, 308 &cs4349_dai, 1); 309 } 310 311 static int cs4349_i2c_remove(struct i2c_client *client) 312 { 313 struct cs4349_private *cs4349 = i2c_get_clientdata(client); 314 315 snd_soc_unregister_codec(&client->dev); 316 317 /* Hold down reset */ 318 gpiod_set_value_cansleep(cs4349->reset_gpio, 0); 319 320 return 0; 321 } 322 323 #ifdef CONFIG_PM 324 static int cs4349_runtime_suspend(struct device *dev) 325 { 326 struct cs4349_private *cs4349 = dev_get_drvdata(dev); 327 int ret; 328 329 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN); 330 if (ret < 0) 331 return ret; 332 333 regcache_cache_only(cs4349->regmap, true); 334 335 /* Hold down reset */ 336 gpiod_set_value_cansleep(cs4349->reset_gpio, 0); 337 338 return 0; 339 } 340 341 static int cs4349_runtime_resume(struct device *dev) 342 { 343 struct cs4349_private *cs4349 = dev_get_drvdata(dev); 344 int ret; 345 346 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0); 347 if (ret < 0) 348 return ret; 349 350 gpiod_set_value_cansleep(cs4349->reset_gpio, 1); 351 352 regcache_cache_only(cs4349->regmap, false); 353 regcache_sync(cs4349->regmap); 354 355 return 0; 356 } 357 #endif 358 359 static const struct dev_pm_ops cs4349_runtime_pm = { 360 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume, 361 NULL) 362 }; 363 364 static const struct of_device_id cs4349_of_match[] = { 365 { .compatible = "cirrus,cs4349", }, 366 {}, 367 }; 368 369 MODULE_DEVICE_TABLE(of, cs4349_of_match); 370 371 static const struct i2c_device_id cs4349_i2c_id[] = { 372 {"cs4349", 0}, 373 {} 374 }; 375 376 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id); 377 378 static struct i2c_driver cs4349_i2c_driver = { 379 .driver = { 380 .name = "cs4349", 381 .of_match_table = cs4349_of_match, 382 }, 383 .id_table = cs4349_i2c_id, 384 .probe = cs4349_i2c_probe, 385 .remove = cs4349_i2c_remove, 386 }; 387 388 module_i2c_driver(cs4349_i2c_driver); 389 390 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>"); 391 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver"); 392 MODULE_LICENSE("GPL"); 393