1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * cs4349.c -- CS4349 ALSA Soc Audio driver 4 * 5 * Copyright 2015 Cirrus Logic, Inc. 6 * 7 * Authors: Tim Howe <Tim.Howe@cirrus.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/delay.h> 15 #include <linux/gpio.h> 16 #include <linux/gpio/consumer.h> 17 #include <linux/platform_device.h> 18 #include <linux/pm.h> 19 #include <linux/i2c.h> 20 #include <linux/of_device.h> 21 #include <linux/regmap.h> 22 #include <linux/slab.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dapm.h> 28 #include <sound/initval.h> 29 #include <sound/tlv.h> 30 #include "cs4349.h" 31 32 33 static const struct reg_default cs4349_reg_defaults[] = { 34 { 2, 0x00 }, /* r02 - Mode Control */ 35 { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */ 36 { 4, 0x81 }, /* r04 - Mute Control */ 37 { 5, 0x00 }, /* r05 - Channel A Volume Control */ 38 { 6, 0x00 }, /* r06 - Channel B Volume Control */ 39 { 7, 0xB1 }, /* r07 - Ramp and Filter Control */ 40 { 8, 0x1C }, /* r08 - Misc. Control */ 41 }; 42 43 /* Private data for the CS4349 */ 44 struct cs4349_private { 45 struct regmap *regmap; 46 struct gpio_desc *reset_gpio; 47 unsigned int mode; 48 int rate; 49 }; 50 51 static bool cs4349_readable_register(struct device *dev, unsigned int reg) 52 { 53 switch (reg) { 54 case CS4349_CHIPID ... CS4349_MISC: 55 return true; 56 default: 57 return false; 58 } 59 } 60 61 static bool cs4349_writeable_register(struct device *dev, unsigned int reg) 62 { 63 switch (reg) { 64 case CS4349_MODE ... CS4349_MISC: 65 return true; 66 default: 67 return false; 68 } 69 } 70 71 static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai, 72 unsigned int format) 73 { 74 struct snd_soc_component *component = codec_dai->component; 75 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component); 76 unsigned int fmt; 77 78 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK; 79 80 switch (fmt) { 81 case SND_SOC_DAIFMT_I2S: 82 case SND_SOC_DAIFMT_LEFT_J: 83 case SND_SOC_DAIFMT_RIGHT_J: 84 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK; 85 break; 86 default: 87 return -EINVAL; 88 } 89 90 return 0; 91 } 92 93 static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream, 94 struct snd_pcm_hw_params *params, 95 struct snd_soc_dai *dai) 96 { 97 struct snd_soc_component *component = dai->component; 98 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component); 99 int fmt, ret; 100 101 cs4349->rate = params_rate(params); 102 103 switch (cs4349->mode) { 104 case SND_SOC_DAIFMT_I2S: 105 fmt = DIF_I2S; 106 break; 107 case SND_SOC_DAIFMT_LEFT_J: 108 fmt = DIF_LEFT_JST; 109 break; 110 case SND_SOC_DAIFMT_RIGHT_J: 111 switch (params_width(params)) { 112 case 16: 113 fmt = DIF_RGHT_JST16; 114 break; 115 case 24: 116 fmt = DIF_RGHT_JST24; 117 break; 118 default: 119 return -EINVAL; 120 } 121 break; 122 default: 123 return -EINVAL; 124 } 125 126 ret = snd_soc_component_update_bits(component, CS4349_MODE, DIF_MASK, 127 MODE_FORMAT(fmt)); 128 if (ret < 0) 129 return ret; 130 131 return 0; 132 } 133 134 static int cs4349_mute(struct snd_soc_dai *dai, int mute, int direction) 135 { 136 struct snd_soc_component *component = dai->component; 137 int reg; 138 139 reg = 0; 140 if (mute) 141 reg = MUTE_AB_MASK; 142 143 return snd_soc_component_update_bits(component, CS4349_MUTE, MUTE_AB_MASK, reg); 144 } 145 146 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0); 147 148 static const char * const chan_mix_texts[] = { 149 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB", 150 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL", 151 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono", 152 /*Normal == Channel A = Left, Channel B = Right*/ 153 }; 154 155 static const char * const fm_texts[] = { 156 "Auto", "Single", "Double", "Quad", 157 }; 158 159 static const char * const deemph_texts[] = { 160 "None", "44.1k", "48k", "32k", 161 }; 162 163 static const char * const softr_zeroc_texts[] = { 164 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC", 165 }; 166 167 static int deemph_values[] = { 168 0, 4, 8, 12, 169 }; 170 171 static int softr_zeroc_values[] = { 172 0, 64, 128, 192, 173 }; 174 175 static const struct soc_enum chan_mix_enum = 176 SOC_ENUM_SINGLE(CS4349_VMI, 0, 177 ARRAY_SIZE(chan_mix_texts), 178 chan_mix_texts); 179 180 static const struct soc_enum fm_mode_enum = 181 SOC_ENUM_SINGLE(CS4349_MODE, 0, 182 ARRAY_SIZE(fm_texts), 183 fm_texts); 184 185 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK, 186 deemph_texts, deemph_values); 187 188 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0, 189 SR_ZC_MASK, softr_zeroc_texts, 190 softr_zeroc_values); 191 192 static const struct snd_kcontrol_new cs4349_snd_controls[] = { 193 SOC_DOUBLE_R_TLV("Master Playback Volume", 194 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv), 195 SOC_ENUM("Functional Mode", fm_mode_enum), 196 SOC_ENUM("De-Emphasis Control", deemph_enum), 197 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum), 198 SOC_ENUM("Channel Mixer", chan_mix_enum), 199 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0), 200 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0), 201 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0), 202 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0), 203 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0), 204 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0), 205 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0), 206 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0), 207 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0), 208 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0), 209 }; 210 211 static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = { 212 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0), 213 214 SND_SOC_DAPM_OUTPUT("OutputA"), 215 SND_SOC_DAPM_OUTPUT("OutputB"), 216 }; 217 218 static const struct snd_soc_dapm_route cs4349_routes[] = { 219 {"DAC Playback", NULL, "OutputA"}, 220 {"DAC Playback", NULL, "OutputB"}, 221 222 {"OutputA", NULL, "HiFi DAC"}, 223 {"OutputB", NULL, "HiFi DAC"}, 224 }; 225 226 #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ 227 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE | \ 228 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE | \ 229 SNDRV_PCM_FMTBIT_S32_LE) 230 231 #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000 232 233 static const struct snd_soc_dai_ops cs4349_dai_ops = { 234 .hw_params = cs4349_pcm_hw_params, 235 .set_fmt = cs4349_set_dai_fmt, 236 .mute_stream = cs4349_mute, 237 .no_capture_mute = 1, 238 }; 239 240 static struct snd_soc_dai_driver cs4349_dai = { 241 .name = "cs4349_hifi", 242 .playback = { 243 .stream_name = "DAC Playback", 244 .channels_min = 1, 245 .channels_max = 2, 246 .rates = CS4349_PCM_RATES, 247 .formats = CS4349_PCM_FORMATS, 248 }, 249 .ops = &cs4349_dai_ops, 250 .symmetric_rate = 1, 251 }; 252 253 static const struct snd_soc_component_driver soc_component_dev_cs4349 = { 254 .controls = cs4349_snd_controls, 255 .num_controls = ARRAY_SIZE(cs4349_snd_controls), 256 .dapm_widgets = cs4349_dapm_widgets, 257 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets), 258 .dapm_routes = cs4349_routes, 259 .num_dapm_routes = ARRAY_SIZE(cs4349_routes), 260 .idle_bias_on = 1, 261 .use_pmdown_time = 1, 262 .endianness = 1, 263 }; 264 265 static const struct regmap_config cs4349_regmap = { 266 .reg_bits = 8, 267 .val_bits = 8, 268 269 .max_register = CS4349_MISC, 270 .reg_defaults = cs4349_reg_defaults, 271 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults), 272 .readable_reg = cs4349_readable_register, 273 .writeable_reg = cs4349_writeable_register, 274 .cache_type = REGCACHE_RBTREE, 275 }; 276 277 static int cs4349_i2c_probe(struct i2c_client *client) 278 { 279 struct cs4349_private *cs4349; 280 int ret; 281 282 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL); 283 if (!cs4349) 284 return -ENOMEM; 285 286 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap); 287 if (IS_ERR(cs4349->regmap)) { 288 ret = PTR_ERR(cs4349->regmap); 289 dev_err(&client->dev, "regmap_init() failed: %d\n", ret); 290 return ret; 291 } 292 293 /* Reset the Device */ 294 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev, 295 "reset", GPIOD_OUT_LOW); 296 if (IS_ERR(cs4349->reset_gpio)) 297 return PTR_ERR(cs4349->reset_gpio); 298 299 gpiod_set_value_cansleep(cs4349->reset_gpio, 1); 300 301 i2c_set_clientdata(client, cs4349); 302 303 return devm_snd_soc_register_component(&client->dev, 304 &soc_component_dev_cs4349, 305 &cs4349_dai, 1); 306 } 307 308 static void cs4349_i2c_remove(struct i2c_client *client) 309 { 310 struct cs4349_private *cs4349 = i2c_get_clientdata(client); 311 312 /* Hold down reset */ 313 gpiod_set_value_cansleep(cs4349->reset_gpio, 0); 314 } 315 316 #ifdef CONFIG_PM 317 static int cs4349_runtime_suspend(struct device *dev) 318 { 319 struct cs4349_private *cs4349 = dev_get_drvdata(dev); 320 int ret; 321 322 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN); 323 if (ret < 0) 324 return ret; 325 326 regcache_cache_only(cs4349->regmap, true); 327 328 /* Hold down reset */ 329 gpiod_set_value_cansleep(cs4349->reset_gpio, 0); 330 331 return 0; 332 } 333 334 static int cs4349_runtime_resume(struct device *dev) 335 { 336 struct cs4349_private *cs4349 = dev_get_drvdata(dev); 337 int ret; 338 339 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0); 340 if (ret < 0) 341 return ret; 342 343 gpiod_set_value_cansleep(cs4349->reset_gpio, 1); 344 345 regcache_cache_only(cs4349->regmap, false); 346 regcache_sync(cs4349->regmap); 347 348 return 0; 349 } 350 #endif 351 352 static const struct dev_pm_ops cs4349_runtime_pm = { 353 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume, 354 NULL) 355 }; 356 357 static const struct of_device_id cs4349_of_match[] = { 358 { .compatible = "cirrus,cs4349", }, 359 {}, 360 }; 361 362 MODULE_DEVICE_TABLE(of, cs4349_of_match); 363 364 static const struct i2c_device_id cs4349_i2c_id[] = { 365 {"cs4349", 0}, 366 {} 367 }; 368 369 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id); 370 371 static struct i2c_driver cs4349_i2c_driver = { 372 .driver = { 373 .name = "cs4349", 374 .of_match_table = cs4349_of_match, 375 .pm = &cs4349_runtime_pm, 376 }, 377 .id_table = cs4349_i2c_id, 378 .probe = cs4349_i2c_probe, 379 .remove = cs4349_i2c_remove, 380 }; 381 382 module_i2c_driver(cs4349_i2c_driver); 383 384 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>"); 385 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver"); 386 MODULE_LICENSE("GPL"); 387