1 /* 2 * SSM2518 amplifier audio driver 3 * 4 * Copyright 2013 Analog Devices Inc. 5 * Author: Lars-Peter Clausen <lars@metafoo.de> 6 * 7 * Licensed under the GPL-2. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/i2c.h> 13 #include <linux/regmap.h> 14 #include <linux/slab.h> 15 #include <linux/gpio.h> 16 #include <linux/of_gpio.h> 17 #include <linux/platform_data/ssm2518.h> 18 #include <sound/core.h> 19 #include <sound/pcm.h> 20 #include <sound/pcm_params.h> 21 #include <sound/soc.h> 22 #include <sound/initval.h> 23 #include <sound/tlv.h> 24 25 #include "ssm2518.h" 26 27 #define SSM2518_REG_POWER1 0x00 28 #define SSM2518_REG_CLOCK 0x01 29 #define SSM2518_REG_SAI_CTRL1 0x02 30 #define SSM2518_REG_SAI_CTRL2 0x03 31 #define SSM2518_REG_CHAN_MAP 0x04 32 #define SSM2518_REG_LEFT_VOL 0x05 33 #define SSM2518_REG_RIGHT_VOL 0x06 34 #define SSM2518_REG_MUTE_CTRL 0x07 35 #define SSM2518_REG_FAULT_CTRL 0x08 36 #define SSM2518_REG_POWER2 0x09 37 #define SSM2518_REG_DRC_1 0x0a 38 #define SSM2518_REG_DRC_2 0x0b 39 #define SSM2518_REG_DRC_3 0x0c 40 #define SSM2518_REG_DRC_4 0x0d 41 #define SSM2518_REG_DRC_5 0x0e 42 #define SSM2518_REG_DRC_6 0x0f 43 #define SSM2518_REG_DRC_7 0x10 44 #define SSM2518_REG_DRC_8 0x11 45 #define SSM2518_REG_DRC_9 0x12 46 47 #define SSM2518_POWER1_RESET BIT(7) 48 #define SSM2518_POWER1_NO_BCLK BIT(5) 49 #define SSM2518_POWER1_MCS_MASK (0xf << 1) 50 #define SSM2518_POWER1_MCS_64FS (0x0 << 1) 51 #define SSM2518_POWER1_MCS_128FS (0x1 << 1) 52 #define SSM2518_POWER1_MCS_256FS (0x2 << 1) 53 #define SSM2518_POWER1_MCS_384FS (0x3 << 1) 54 #define SSM2518_POWER1_MCS_512FS (0x4 << 1) 55 #define SSM2518_POWER1_MCS_768FS (0x5 << 1) 56 #define SSM2518_POWER1_MCS_100FS (0x6 << 1) 57 #define SSM2518_POWER1_MCS_200FS (0x7 << 1) 58 #define SSM2518_POWER1_MCS_400FS (0x8 << 1) 59 #define SSM2518_POWER1_SPWDN BIT(0) 60 61 #define SSM2518_CLOCK_ASR BIT(0) 62 63 #define SSM2518_SAI_CTRL1_FMT_MASK (0x3 << 5) 64 #define SSM2518_SAI_CTRL1_FMT_I2S (0x0 << 5) 65 #define SSM2518_SAI_CTRL1_FMT_LJ (0x1 << 5) 66 #define SSM2518_SAI_CTRL1_FMT_RJ_24BIT (0x2 << 5) 67 #define SSM2518_SAI_CTRL1_FMT_RJ_16BIT (0x3 << 5) 68 69 #define SSM2518_SAI_CTRL1_SAI_MASK (0x7 << 2) 70 #define SSM2518_SAI_CTRL1_SAI_I2S (0x0 << 2) 71 #define SSM2518_SAI_CTRL1_SAI_TDM_2 (0x1 << 2) 72 #define SSM2518_SAI_CTRL1_SAI_TDM_4 (0x2 << 2) 73 #define SSM2518_SAI_CTRL1_SAI_TDM_8 (0x3 << 2) 74 #define SSM2518_SAI_CTRL1_SAI_TDM_16 (0x4 << 2) 75 #define SSM2518_SAI_CTRL1_SAI_MONO (0x5 << 2) 76 77 #define SSM2518_SAI_CTRL1_FS_MASK (0x3) 78 #define SSM2518_SAI_CTRL1_FS_8000_12000 (0x0) 79 #define SSM2518_SAI_CTRL1_FS_16000_24000 (0x1) 80 #define SSM2518_SAI_CTRL1_FS_32000_48000 (0x2) 81 #define SSM2518_SAI_CTRL1_FS_64000_96000 (0x3) 82 83 #define SSM2518_SAI_CTRL2_BCLK_INTERAL BIT(7) 84 #define SSM2518_SAI_CTRL2_LRCLK_PULSE BIT(6) 85 #define SSM2518_SAI_CTRL2_LRCLK_INVERT BIT(5) 86 #define SSM2518_SAI_CTRL2_MSB BIT(4) 87 #define SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK (0x3 << 2) 88 #define SSM2518_SAI_CTRL2_SLOT_WIDTH_32 (0x0 << 2) 89 #define SSM2518_SAI_CTRL2_SLOT_WIDTH_24 (0x1 << 2) 90 #define SSM2518_SAI_CTRL2_SLOT_WIDTH_16 (0x2 << 2) 91 #define SSM2518_SAI_CTRL2_BCLK_INVERT BIT(1) 92 93 #define SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET 4 94 #define SSM2518_CHAN_MAP_RIGHT_SLOT_MASK 0xf0 95 #define SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET 0 96 #define SSM2518_CHAN_MAP_LEFT_SLOT_MASK 0x0f 97 98 #define SSM2518_MUTE_CTRL_ANA_GAIN BIT(5) 99 #define SSM2518_MUTE_CTRL_MUTE_MASTER BIT(0) 100 101 #define SSM2518_POWER2_APWDN BIT(0) 102 103 #define SSM2518_DAC_MUTE BIT(6) 104 #define SSM2518_DAC_FS_MASK 0x07 105 #define SSM2518_DAC_FS_8000 0x00 106 #define SSM2518_DAC_FS_16000 0x01 107 #define SSM2518_DAC_FS_32000 0x02 108 #define SSM2518_DAC_FS_64000 0x03 109 #define SSM2518_DAC_FS_128000 0x04 110 111 struct ssm2518 { 112 struct regmap *regmap; 113 bool right_j; 114 115 unsigned int sysclk; 116 const struct snd_pcm_hw_constraint_list *constraints; 117 118 int enable_gpio; 119 }; 120 121 static const struct reg_default ssm2518_reg_defaults[] = { 122 { 0x00, 0x05 }, 123 { 0x01, 0x00 }, 124 { 0x02, 0x02 }, 125 { 0x03, 0x00 }, 126 { 0x04, 0x10 }, 127 { 0x05, 0x40 }, 128 { 0x06, 0x40 }, 129 { 0x07, 0x81 }, 130 { 0x08, 0x0c }, 131 { 0x09, 0x99 }, 132 { 0x0a, 0x7c }, 133 { 0x0b, 0x5b }, 134 { 0x0c, 0x57 }, 135 { 0x0d, 0x89 }, 136 { 0x0e, 0x8c }, 137 { 0x0f, 0x77 }, 138 { 0x10, 0x26 }, 139 { 0x11, 0x1c }, 140 { 0x12, 0x97 }, 141 }; 142 143 static const DECLARE_TLV_DB_MINMAX_MUTE(ssm2518_vol_tlv, -7125, 2400); 144 static const DECLARE_TLV_DB_SCALE(ssm2518_compressor_tlv, -3400, 200, 0); 145 static const DECLARE_TLV_DB_SCALE(ssm2518_expander_tlv, -8100, 300, 0); 146 static const DECLARE_TLV_DB_SCALE(ssm2518_noise_gate_tlv, -9600, 300, 0); 147 static const DECLARE_TLV_DB_SCALE(ssm2518_post_drc_tlv, -2400, 300, 0); 148 149 static const DECLARE_TLV_DB_RANGE(ssm2518_limiter_tlv, 150 0, 7, TLV_DB_SCALE_ITEM(-2200, 200, 0), 151 7, 15, TLV_DB_SCALE_ITEM(-800, 100, 0), 152 ); 153 154 static const char * const ssm2518_drc_peak_detector_attack_time_text[] = { 155 "0 ms", "0.1 ms", "0.19 ms", "0.37 ms", "0.75 ms", "1.5 ms", "3 ms", 156 "6 ms", "12 ms", "24 ms", "48 ms", "96 ms", "192 ms", "384 ms", 157 "768 ms", "1536 ms", 158 }; 159 160 static const char * const ssm2518_drc_peak_detector_release_time_text[] = { 161 "0 ms", "1.5 ms", "3 ms", "6 ms", "12 ms", "24 ms", "48 ms", "96 ms", 162 "192 ms", "384 ms", "768 ms", "1536 ms", "3072 ms", "6144 ms", 163 "12288 ms", "24576 ms" 164 }; 165 166 static const char * const ssm2518_drc_hold_time_text[] = { 167 "0 ms", "0.67 ms", "1.33 ms", "2.67 ms", "5.33 ms", "10.66 ms", 168 "21.32 ms", "42.64 ms", "85.28 ms", "170.56 ms", "341.12 ms", 169 "682.24 ms", "1364 ms", 170 }; 171 172 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_attack_time_enum, 173 SSM2518_REG_DRC_2, 4, ssm2518_drc_peak_detector_attack_time_text); 174 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_release_time_enum, 175 SSM2518_REG_DRC_2, 0, ssm2518_drc_peak_detector_release_time_text); 176 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_attack_time_enum, 177 SSM2518_REG_DRC_6, 4, ssm2518_drc_peak_detector_attack_time_text); 178 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_decay_time_enum, 179 SSM2518_REG_DRC_6, 0, ssm2518_drc_peak_detector_release_time_text); 180 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_hold_time_enum, 181 SSM2518_REG_DRC_7, 4, ssm2518_drc_hold_time_text); 182 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_noise_gate_hold_time_enum, 183 SSM2518_REG_DRC_7, 0, ssm2518_drc_hold_time_text); 184 static SOC_ENUM_SINGLE_DECL(ssm2518_drc_rms_averaging_time_enum, 185 SSM2518_REG_DRC_9, 0, ssm2518_drc_peak_detector_release_time_text); 186 187 static const struct snd_kcontrol_new ssm2518_snd_controls[] = { 188 SOC_SINGLE("Playback De-emphasis Switch", SSM2518_REG_MUTE_CTRL, 189 4, 1, 0), 190 SOC_DOUBLE_R_TLV("Master Playback Volume", SSM2518_REG_LEFT_VOL, 191 SSM2518_REG_RIGHT_VOL, 0, 0xff, 1, ssm2518_vol_tlv), 192 SOC_DOUBLE("Master Playback Switch", SSM2518_REG_MUTE_CTRL, 2, 1, 1, 1), 193 194 SOC_SINGLE("Amp Low Power Mode Switch", SSM2518_REG_POWER2, 4, 1, 0), 195 SOC_SINGLE("DAC Low Power Mode Switch", SSM2518_REG_POWER2, 3, 1, 0), 196 197 SOC_SINGLE("DRC Limiter Switch", SSM2518_REG_DRC_1, 5, 1, 0), 198 SOC_SINGLE("DRC Compressor Switch", SSM2518_REG_DRC_1, 4, 1, 0), 199 SOC_SINGLE("DRC Expander Switch", SSM2518_REG_DRC_1, 3, 1, 0), 200 SOC_SINGLE("DRC Noise Gate Switch", SSM2518_REG_DRC_1, 2, 1, 0), 201 SOC_DOUBLE("DRC Switch", SSM2518_REG_DRC_1, 0, 1, 1, 0), 202 203 SOC_SINGLE_TLV("DRC Limiter Threshold Volume", 204 SSM2518_REG_DRC_3, 4, 15, 1, ssm2518_limiter_tlv), 205 SOC_SINGLE_TLV("DRC Compressor Lower Threshold Volume", 206 SSM2518_REG_DRC_3, 0, 15, 1, ssm2518_compressor_tlv), 207 SOC_SINGLE_TLV("DRC Expander Upper Threshold Volume", SSM2518_REG_DRC_4, 208 4, 15, 1, ssm2518_expander_tlv), 209 SOC_SINGLE_TLV("DRC Noise Gate Threshold Volume", 210 SSM2518_REG_DRC_4, 0, 15, 1, ssm2518_noise_gate_tlv), 211 SOC_SINGLE_TLV("DRC Upper Output Threshold Volume", 212 SSM2518_REG_DRC_5, 4, 15, 1, ssm2518_limiter_tlv), 213 SOC_SINGLE_TLV("DRC Lower Output Threshold Volume", 214 SSM2518_REG_DRC_5, 0, 15, 1, ssm2518_noise_gate_tlv), 215 SOC_SINGLE_TLV("DRC Post Volume", SSM2518_REG_DRC_8, 216 2, 15, 1, ssm2518_post_drc_tlv), 217 218 SOC_ENUM("DRC Peak Detector Attack Time", 219 ssm2518_drc_peak_detector_attack_time_enum), 220 SOC_ENUM("DRC Peak Detector Release Time", 221 ssm2518_drc_peak_detector_release_time_enum), 222 SOC_ENUM("DRC Attack Time", ssm2518_drc_attack_time_enum), 223 SOC_ENUM("DRC Decay Time", ssm2518_drc_decay_time_enum), 224 SOC_ENUM("DRC Hold Time", ssm2518_drc_hold_time_enum), 225 SOC_ENUM("DRC Noise Gate Hold Time", 226 ssm2518_drc_noise_gate_hold_time_enum), 227 SOC_ENUM("DRC RMS Averaging Time", ssm2518_drc_rms_averaging_time_enum), 228 }; 229 230 static const struct snd_soc_dapm_widget ssm2518_dapm_widgets[] = { 231 SND_SOC_DAPM_DAC("DACL", "HiFi Playback", SSM2518_REG_POWER2, 1, 1), 232 SND_SOC_DAPM_DAC("DACR", "HiFi Playback", SSM2518_REG_POWER2, 2, 1), 233 234 SND_SOC_DAPM_OUTPUT("OUTL"), 235 SND_SOC_DAPM_OUTPUT("OUTR"), 236 }; 237 238 static const struct snd_soc_dapm_route ssm2518_routes[] = { 239 { "OUTL", NULL, "DACL" }, 240 { "OUTR", NULL, "DACR" }, 241 }; 242 243 struct ssm2518_mcs_lut { 244 unsigned int rate; 245 const unsigned int *sysclks; 246 }; 247 248 static const unsigned int ssm2518_sysclks_2048000[] = { 249 2048000, 4096000, 8192000, 12288000, 16384000, 24576000, 250 3200000, 6400000, 12800000, 0 251 }; 252 253 static const unsigned int ssm2518_sysclks_2822000[] = { 254 2822000, 5644800, 11289600, 16934400, 22579200, 33868800, 255 4410000, 8820000, 17640000, 0 256 }; 257 258 static const unsigned int ssm2518_sysclks_3072000[] = { 259 3072000, 6144000, 12288000, 16384000, 24576000, 38864000, 260 4800000, 9600000, 19200000, 0 261 }; 262 263 static const struct ssm2518_mcs_lut ssm2518_mcs_lut[] = { 264 { 8000, ssm2518_sysclks_2048000, }, 265 { 11025, ssm2518_sysclks_2822000, }, 266 { 12000, ssm2518_sysclks_3072000, }, 267 { 16000, ssm2518_sysclks_2048000, }, 268 { 24000, ssm2518_sysclks_3072000, }, 269 { 22050, ssm2518_sysclks_2822000, }, 270 { 32000, ssm2518_sysclks_2048000, }, 271 { 44100, ssm2518_sysclks_2822000, }, 272 { 48000, ssm2518_sysclks_3072000, }, 273 { 96000, ssm2518_sysclks_3072000, }, 274 }; 275 276 static const unsigned int ssm2518_rates_2048000[] = { 277 8000, 16000, 32000, 278 }; 279 280 static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2048000 = { 281 .list = ssm2518_rates_2048000, 282 .count = ARRAY_SIZE(ssm2518_rates_2048000), 283 }; 284 285 static const unsigned int ssm2518_rates_2822000[] = { 286 11025, 22050, 44100, 287 }; 288 289 static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2822000 = { 290 .list = ssm2518_rates_2822000, 291 .count = ARRAY_SIZE(ssm2518_rates_2822000), 292 }; 293 294 static const unsigned int ssm2518_rates_3072000[] = { 295 12000, 24000, 48000, 96000, 296 }; 297 298 static const struct snd_pcm_hw_constraint_list ssm2518_constraints_3072000 = { 299 .list = ssm2518_rates_3072000, 300 .count = ARRAY_SIZE(ssm2518_rates_3072000), 301 }; 302 303 static const unsigned int ssm2518_rates_12288000[] = { 304 8000, 12000, 16000, 24000, 32000, 48000, 96000, 305 }; 306 307 static const struct snd_pcm_hw_constraint_list ssm2518_constraints_12288000 = { 308 .list = ssm2518_rates_12288000, 309 .count = ARRAY_SIZE(ssm2518_rates_12288000), 310 }; 311 312 static int ssm2518_lookup_mcs(struct ssm2518 *ssm2518, 313 unsigned int rate) 314 { 315 const unsigned int *sysclks = NULL; 316 int i; 317 318 for (i = 0; i < ARRAY_SIZE(ssm2518_mcs_lut); i++) { 319 if (ssm2518_mcs_lut[i].rate == rate) { 320 sysclks = ssm2518_mcs_lut[i].sysclks; 321 break; 322 } 323 } 324 325 if (!sysclks) 326 return -EINVAL; 327 328 for (i = 0; sysclks[i]; i++) { 329 if (sysclks[i] == ssm2518->sysclk) 330 return i; 331 } 332 333 return -EINVAL; 334 } 335 336 static int ssm2518_hw_params(struct snd_pcm_substream *substream, 337 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 338 { 339 struct snd_soc_codec *codec = dai->codec; 340 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec); 341 unsigned int rate = params_rate(params); 342 unsigned int ctrl1, ctrl1_mask; 343 int mcs; 344 int ret; 345 346 mcs = ssm2518_lookup_mcs(ssm2518, rate); 347 if (mcs < 0) 348 return mcs; 349 350 ctrl1_mask = SSM2518_SAI_CTRL1_FS_MASK; 351 352 if (rate >= 8000 && rate <= 12000) 353 ctrl1 = SSM2518_SAI_CTRL1_FS_8000_12000; 354 else if (rate >= 16000 && rate <= 24000) 355 ctrl1 = SSM2518_SAI_CTRL1_FS_16000_24000; 356 else if (rate >= 32000 && rate <= 48000) 357 ctrl1 = SSM2518_SAI_CTRL1_FS_32000_48000; 358 else if (rate >= 64000 && rate <= 96000) 359 ctrl1 = SSM2518_SAI_CTRL1_FS_64000_96000; 360 else 361 return -EINVAL; 362 363 if (ssm2518->right_j) { 364 switch (params_width(params)) { 365 case 16: 366 ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_16BIT; 367 break; 368 case 24: 369 ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT; 370 break; 371 default: 372 return -EINVAL; 373 } 374 ctrl1_mask |= SSM2518_SAI_CTRL1_FMT_MASK; 375 } 376 377 /* Disable auto samplerate detection */ 378 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_CLOCK, 379 SSM2518_CLOCK_ASR, SSM2518_CLOCK_ASR); 380 if (ret < 0) 381 return ret; 382 383 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1, 384 ctrl1_mask, ctrl1); 385 if (ret < 0) 386 return ret; 387 388 return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1, 389 SSM2518_POWER1_MCS_MASK, mcs << 1); 390 } 391 392 static int ssm2518_mute(struct snd_soc_dai *dai, int mute) 393 { 394 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec); 395 unsigned int val; 396 397 if (mute) 398 val = SSM2518_MUTE_CTRL_MUTE_MASTER; 399 else 400 val = 0; 401 402 return regmap_update_bits(ssm2518->regmap, SSM2518_REG_MUTE_CTRL, 403 SSM2518_MUTE_CTRL_MUTE_MASTER, val); 404 } 405 406 static int ssm2518_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) 407 { 408 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec); 409 unsigned int ctrl1 = 0, ctrl2 = 0; 410 bool invert_fclk; 411 int ret; 412 413 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 414 case SND_SOC_DAIFMT_CBS_CFS: 415 break; 416 default: 417 return -EINVAL; 418 } 419 420 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 421 case SND_SOC_DAIFMT_NB_NF: 422 invert_fclk = false; 423 break; 424 case SND_SOC_DAIFMT_IB_NF: 425 ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT; 426 invert_fclk = false; 427 break; 428 case SND_SOC_DAIFMT_NB_IF: 429 invert_fclk = true; 430 break; 431 case SND_SOC_DAIFMT_IB_IF: 432 ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT; 433 invert_fclk = true; 434 break; 435 default: 436 return -EINVAL; 437 } 438 439 ssm2518->right_j = false; 440 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 441 case SND_SOC_DAIFMT_I2S: 442 ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S; 443 break; 444 case SND_SOC_DAIFMT_LEFT_J: 445 ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ; 446 invert_fclk = !invert_fclk; 447 break; 448 case SND_SOC_DAIFMT_RIGHT_J: 449 ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT; 450 ssm2518->right_j = true; 451 invert_fclk = !invert_fclk; 452 break; 453 case SND_SOC_DAIFMT_DSP_A: 454 ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE; 455 ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S; 456 invert_fclk = false; 457 break; 458 case SND_SOC_DAIFMT_DSP_B: 459 ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE; 460 ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ; 461 invert_fclk = false; 462 break; 463 default: 464 return -EINVAL; 465 } 466 467 if (invert_fclk) 468 ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_INVERT; 469 470 ret = regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL1, ctrl1); 471 if (ret) 472 return ret; 473 474 return regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL2, ctrl2); 475 } 476 477 static int ssm2518_set_power(struct ssm2518 *ssm2518, bool enable) 478 { 479 int ret = 0; 480 481 if (!enable) { 482 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1, 483 SSM2518_POWER1_SPWDN, SSM2518_POWER1_SPWDN); 484 regcache_mark_dirty(ssm2518->regmap); 485 } 486 487 if (gpio_is_valid(ssm2518->enable_gpio)) 488 gpio_set_value(ssm2518->enable_gpio, enable); 489 490 regcache_cache_only(ssm2518->regmap, !enable); 491 492 if (enable) { 493 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1, 494 SSM2518_POWER1_SPWDN | SSM2518_POWER1_RESET, 0x00); 495 regcache_sync(ssm2518->regmap); 496 } 497 498 return ret; 499 } 500 501 static int ssm2518_set_bias_level(struct snd_soc_codec *codec, 502 enum snd_soc_bias_level level) 503 { 504 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec); 505 int ret = 0; 506 507 switch (level) { 508 case SND_SOC_BIAS_ON: 509 break; 510 case SND_SOC_BIAS_PREPARE: 511 break; 512 case SND_SOC_BIAS_STANDBY: 513 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) 514 ret = ssm2518_set_power(ssm2518, true); 515 break; 516 case SND_SOC_BIAS_OFF: 517 ret = ssm2518_set_power(ssm2518, false); 518 break; 519 } 520 521 return ret; 522 } 523 524 static int ssm2518_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 525 unsigned int rx_mask, int slots, int width) 526 { 527 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec); 528 unsigned int ctrl1, ctrl2; 529 int left_slot, right_slot; 530 int ret; 531 532 if (slots == 0) 533 return regmap_update_bits(ssm2518->regmap, 534 SSM2518_REG_SAI_CTRL1, SSM2518_SAI_CTRL1_SAI_MASK, 535 SSM2518_SAI_CTRL1_SAI_I2S); 536 537 if (tx_mask == 0 || rx_mask != 0) 538 return -EINVAL; 539 540 if (slots == 1) { 541 if (tx_mask != 1) 542 return -EINVAL; 543 left_slot = 0; 544 right_slot = 0; 545 } else { 546 /* We assume the left channel < right channel */ 547 left_slot = __ffs(tx_mask); 548 tx_mask &= ~(1 << left_slot); 549 if (tx_mask == 0) { 550 right_slot = left_slot; 551 } else { 552 right_slot = __ffs(tx_mask); 553 tx_mask &= ~(1 << right_slot); 554 } 555 } 556 557 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots) 558 return -EINVAL; 559 560 switch (width) { 561 case 16: 562 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_16; 563 break; 564 case 24: 565 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_24; 566 break; 567 case 32: 568 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_32; 569 break; 570 default: 571 return -EINVAL; 572 } 573 574 switch (slots) { 575 case 1: 576 ctrl1 = SSM2518_SAI_CTRL1_SAI_MONO; 577 break; 578 case 2: 579 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_2; 580 break; 581 case 4: 582 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_4; 583 break; 584 case 8: 585 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_8; 586 break; 587 case 16: 588 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_16; 589 break; 590 default: 591 return -EINVAL; 592 } 593 594 ret = regmap_write(ssm2518->regmap, SSM2518_REG_CHAN_MAP, 595 (left_slot << SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET) | 596 (right_slot << SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET)); 597 if (ret) 598 return ret; 599 600 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1, 601 SSM2518_SAI_CTRL1_SAI_MASK, ctrl1); 602 if (ret) 603 return ret; 604 605 return regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL2, 606 SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK, ctrl2); 607 } 608 609 static int ssm2518_startup(struct snd_pcm_substream *substream, 610 struct snd_soc_dai *dai) 611 { 612 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec); 613 614 if (ssm2518->constraints) 615 snd_pcm_hw_constraint_list(substream->runtime, 0, 616 SNDRV_PCM_HW_PARAM_RATE, ssm2518->constraints); 617 618 return 0; 619 } 620 621 #define SSM2518_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ 622 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32) 623 624 static const struct snd_soc_dai_ops ssm2518_dai_ops = { 625 .startup = ssm2518_startup, 626 .hw_params = ssm2518_hw_params, 627 .digital_mute = ssm2518_mute, 628 .set_fmt = ssm2518_set_dai_fmt, 629 .set_tdm_slot = ssm2518_set_tdm_slot, 630 }; 631 632 static struct snd_soc_dai_driver ssm2518_dai = { 633 .name = "ssm2518-hifi", 634 .playback = { 635 .stream_name = "Playback", 636 .channels_min = 2, 637 .channels_max = 2, 638 .rates = SNDRV_PCM_RATE_8000_96000, 639 .formats = SSM2518_FORMATS, 640 }, 641 .ops = &ssm2518_dai_ops, 642 }; 643 644 static int ssm2518_set_sysclk(struct snd_soc_codec *codec, int clk_id, 645 int source, unsigned int freq, int dir) 646 { 647 struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec); 648 unsigned int val; 649 650 if (clk_id != SSM2518_SYSCLK) 651 return -EINVAL; 652 653 switch (source) { 654 case SSM2518_SYSCLK_SRC_MCLK: 655 val = 0; 656 break; 657 case SSM2518_SYSCLK_SRC_BCLK: 658 /* In this case the bitclock is used as the system clock, and 659 * the bitclock signal needs to be connected to the MCLK pin and 660 * the BCLK pin is left unconnected */ 661 val = SSM2518_POWER1_NO_BCLK; 662 break; 663 default: 664 return -EINVAL; 665 } 666 667 switch (freq) { 668 case 0: 669 ssm2518->constraints = NULL; 670 break; 671 case 2048000: 672 case 4096000: 673 case 8192000: 674 case 3200000: 675 case 6400000: 676 case 12800000: 677 ssm2518->constraints = &ssm2518_constraints_2048000; 678 break; 679 case 2822000: 680 case 5644800: 681 case 11289600: 682 case 16934400: 683 case 22579200: 684 case 33868800: 685 case 4410000: 686 case 8820000: 687 case 17640000: 688 ssm2518->constraints = &ssm2518_constraints_2822000; 689 break; 690 case 3072000: 691 case 6144000: 692 case 38864000: 693 case 4800000: 694 case 9600000: 695 case 19200000: 696 ssm2518->constraints = &ssm2518_constraints_3072000; 697 break; 698 case 12288000: 699 case 16384000: 700 case 24576000: 701 ssm2518->constraints = &ssm2518_constraints_12288000; 702 break; 703 default: 704 return -EINVAL; 705 } 706 707 ssm2518->sysclk = freq; 708 709 return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1, 710 SSM2518_POWER1_NO_BCLK, val); 711 } 712 713 static struct snd_soc_codec_driver ssm2518_codec_driver = { 714 .set_bias_level = ssm2518_set_bias_level, 715 .set_sysclk = ssm2518_set_sysclk, 716 .idle_bias_off = true, 717 718 .component_driver = { 719 .controls = ssm2518_snd_controls, 720 .num_controls = ARRAY_SIZE(ssm2518_snd_controls), 721 .dapm_widgets = ssm2518_dapm_widgets, 722 .num_dapm_widgets = ARRAY_SIZE(ssm2518_dapm_widgets), 723 .dapm_routes = ssm2518_routes, 724 .num_dapm_routes = ARRAY_SIZE(ssm2518_routes), 725 }, 726 }; 727 728 static const struct regmap_config ssm2518_regmap_config = { 729 .val_bits = 8, 730 .reg_bits = 8, 731 732 .max_register = SSM2518_REG_DRC_9, 733 734 .cache_type = REGCACHE_RBTREE, 735 .reg_defaults = ssm2518_reg_defaults, 736 .num_reg_defaults = ARRAY_SIZE(ssm2518_reg_defaults), 737 }; 738 739 static int ssm2518_i2c_probe(struct i2c_client *i2c, 740 const struct i2c_device_id *id) 741 { 742 struct ssm2518_platform_data *pdata = i2c->dev.platform_data; 743 struct ssm2518 *ssm2518; 744 int ret; 745 746 ssm2518 = devm_kzalloc(&i2c->dev, sizeof(*ssm2518), GFP_KERNEL); 747 if (ssm2518 == NULL) 748 return -ENOMEM; 749 750 if (pdata) { 751 ssm2518->enable_gpio = pdata->enable_gpio; 752 } else if (i2c->dev.of_node) { 753 ssm2518->enable_gpio = of_get_gpio(i2c->dev.of_node, 0); 754 if (ssm2518->enable_gpio < 0 && ssm2518->enable_gpio != -ENOENT) 755 return ssm2518->enable_gpio; 756 } else { 757 ssm2518->enable_gpio = -1; 758 } 759 760 if (gpio_is_valid(ssm2518->enable_gpio)) { 761 ret = devm_gpio_request_one(&i2c->dev, ssm2518->enable_gpio, 762 GPIOF_OUT_INIT_HIGH, "SSM2518 nSD"); 763 if (ret) 764 return ret; 765 } 766 767 i2c_set_clientdata(i2c, ssm2518); 768 769 ssm2518->regmap = devm_regmap_init_i2c(i2c, &ssm2518_regmap_config); 770 if (IS_ERR(ssm2518->regmap)) 771 return PTR_ERR(ssm2518->regmap); 772 773 /* 774 * The reset bit is obviously volatile, but we need to be able to cache 775 * the other bits in the register, so we can't just mark the whole 776 * register as volatile. Since this is the only place where we'll ever 777 * touch the reset bit just bypass the cache for this operation. 778 */ 779 regcache_cache_bypass(ssm2518->regmap, true); 780 ret = regmap_write(ssm2518->regmap, SSM2518_REG_POWER1, 781 SSM2518_POWER1_RESET); 782 regcache_cache_bypass(ssm2518->regmap, false); 783 if (ret) 784 return ret; 785 786 ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER2, 787 SSM2518_POWER2_APWDN, 0x00); 788 if (ret) 789 return ret; 790 791 ret = ssm2518_set_power(ssm2518, false); 792 if (ret) 793 return ret; 794 795 return snd_soc_register_codec(&i2c->dev, &ssm2518_codec_driver, 796 &ssm2518_dai, 1); 797 } 798 799 static int ssm2518_i2c_remove(struct i2c_client *client) 800 { 801 snd_soc_unregister_codec(&client->dev); 802 return 0; 803 } 804 805 #ifdef CONFIG_OF 806 static const struct of_device_id ssm2518_dt_ids[] = { 807 { .compatible = "adi,ssm2518", }, 808 { } 809 }; 810 MODULE_DEVICE_TABLE(of, ssm2518_dt_ids); 811 #endif 812 813 static const struct i2c_device_id ssm2518_i2c_ids[] = { 814 { "ssm2518", 0 }, 815 { } 816 }; 817 MODULE_DEVICE_TABLE(i2c, ssm2518_i2c_ids); 818 819 static struct i2c_driver ssm2518_driver = { 820 .driver = { 821 .name = "ssm2518", 822 .of_match_table = of_match_ptr(ssm2518_dt_ids), 823 }, 824 .probe = ssm2518_i2c_probe, 825 .remove = ssm2518_i2c_remove, 826 .id_table = ssm2518_i2c_ids, 827 }; 828 module_i2c_driver(ssm2518_driver); 829 830 MODULE_DESCRIPTION("ASoC SSM2518 driver"); 831 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 832 MODULE_LICENSE("GPL"); 833