sound/soc/codecs/ssm2518.c

   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 unsigned 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 (codec->dapm.bias_level == 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         if (ret)
 522                 return ret;
 523
 524         codec->dapm.bias_level = level;
 525
 526         return 0;
 527 }
 528
 529 static int ssm2518_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 530         unsigned int rx_mask, int slots, int width)
 531 {
 532         struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
 533         unsigned int ctrl1, ctrl2;
 534         int left_slot, right_slot;
 535         int ret;
 536
 537         if (slots == 0)
 538                 return regmap_update_bits(ssm2518->regmap,
 539                         SSM2518_REG_SAI_CTRL1, SSM2518_SAI_CTRL1_SAI_MASK,
 540                         SSM2518_SAI_CTRL1_SAI_I2S);
 541
 542         if (tx_mask == 0 || rx_mask != 0)
 543                 return -EINVAL;
 544
 545         if (slots == 1) {
 546                 if (tx_mask != 1)
 547                         return -EINVAL;
 548                 left_slot = 0;
 549                 right_slot = 0;
 550         } else {
 551                 /* We assume the left channel < right channel */
 552                 left_slot = __ffs(tx_mask);
 553                 tx_mask &= ~(1 << left_slot);
 554                 if (tx_mask == 0) {
 555                         right_slot = left_slot;
 556                 } else {
 557                         right_slot = __ffs(tx_mask);
 558                         tx_mask &= ~(1 << right_slot);
 559                 }
 560         }
 561
 562         if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
 563                 return -EINVAL;
 564
 565         switch (width) {
 566         case 16:
 567                 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_16;
 568                 break;
 569         case 24:
 570                 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_24;
 571                 break;
 572         case 32:
 573                 ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_32;
 574                 break;
 575         default:
 576                 return -EINVAL;
 577         }
 578
 579         switch (slots) {
 580         case 1:
 581                 ctrl1 = SSM2518_SAI_CTRL1_SAI_MONO;
 582                 break;
 583         case 2:
 584                 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_2;
 585                 break;
 586         case 4:
 587                 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_4;
 588                 break;
 589         case 8:
 590                 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_8;
 591                 break;
 592         case 16:
 593                 ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_16;
 594                 break;
 595         default:
 596                 return -EINVAL;
 597         }
 598
 599         ret = regmap_write(ssm2518->regmap, SSM2518_REG_CHAN_MAP,
 600                 (left_slot << SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET) |
 601                 (right_slot << SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET));
 602         if (ret)
 603                 return ret;
 604
 605         ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1,
 606                 SSM2518_SAI_CTRL1_SAI_MASK, ctrl1);
 607         if (ret)
 608                 return ret;
 609
 610         return regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL2,
 611                 SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK, ctrl2);
 612 }
 613
 614 static int ssm2518_startup(struct snd_pcm_substream *substream,
 615         struct snd_soc_dai *dai)
 616 {
 617         struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
 618
 619         if (ssm2518->constraints)
 620                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 621                                 SNDRV_PCM_HW_PARAM_RATE, ssm2518->constraints);
 622
 623         return 0;
 624 }
 625
 626 #define SSM2518_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
 627                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
 628
 629 static const struct snd_soc_dai_ops ssm2518_dai_ops = {
 630         .startup = ssm2518_startup,
 631         .hw_params      = ssm2518_hw_params,
 632         .digital_mute   = ssm2518_mute,
 633         .set_fmt        = ssm2518_set_dai_fmt,
 634         .set_tdm_slot   = ssm2518_set_tdm_slot,
 635 };
 636
 637 static struct snd_soc_dai_driver ssm2518_dai = {
 638         .name = "ssm2518-hifi",
 639         .playback = {
 640                 .stream_name = "Playback",
 641                 .channels_min = 2,
 642                 .channels_max = 2,
 643                 .rates = SNDRV_PCM_RATE_8000_96000,
 644                 .formats = SSM2518_FORMATS,
 645         },
 646         .ops = &ssm2518_dai_ops,
 647 };
 648
 649 static int ssm2518_set_sysclk(struct snd_soc_codec *codec, int clk_id,
 650         int source, unsigned int freq, int dir)
 651 {
 652         struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
 653         unsigned int val;
 654
 655         if (clk_id != SSM2518_SYSCLK)
 656                 return -EINVAL;
 657
 658         switch (source) {
 659         case SSM2518_SYSCLK_SRC_MCLK:
 660                 val = 0;
 661                 break;
 662         case SSM2518_SYSCLK_SRC_BCLK:
 663                 /* In this case the bitclock is used as the system clock, and
 664                  * the bitclock signal needs to be connected to the MCLK pin and
 665                  * the BCLK pin is left unconnected */
 666                 val = SSM2518_POWER1_NO_BCLK;
 667                 break;
 668         default:
 669                 return -EINVAL;
 670         }
 671
 672         switch (freq) {
 673         case 0:
 674                 ssm2518->constraints = NULL;
 675                 break;
 676         case 2048000:
 677         case 4096000:
 678         case 8192000:
 679         case 3200000:
 680         case 6400000:
 681         case 12800000:
 682                 ssm2518->constraints = &ssm2518_constraints_2048000;
 683                 break;
 684         case 2822000:
 685         case 5644800:
 686         case 11289600:
 687         case 16934400:
 688         case 22579200:
 689         case 33868800:
 690         case 4410000:
 691         case 8820000:
 692         case 17640000:
 693                 ssm2518->constraints = &ssm2518_constraints_2822000;
 694                 break;
 695         case 3072000:
 696         case 6144000:
 697         case 38864000:
 698         case 4800000:
 699         case 9600000:
 700         case 19200000:
 701                 ssm2518->constraints = &ssm2518_constraints_3072000;
 702                 break;
 703         case 12288000:
 704         case 16384000:
 705         case 24576000:
 706                 ssm2518->constraints = &ssm2518_constraints_12288000;
 707                 break;
 708         default:
 709                 return -EINVAL;
 710         }
 711
 712         ssm2518->sysclk = freq;
 713
 714         return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
 715                         SSM2518_POWER1_NO_BCLK, val);
 716 }
 717
 718 static struct snd_soc_codec_driver ssm2518_codec_driver = {
 719         .set_bias_level = ssm2518_set_bias_level,
 720         .set_sysclk = ssm2518_set_sysclk,
 721         .idle_bias_off = true,
 722
 723         .controls = ssm2518_snd_controls,
 724         .num_controls = ARRAY_SIZE(ssm2518_snd_controls),
 725         .dapm_widgets = ssm2518_dapm_widgets,
 726         .num_dapm_widgets = ARRAY_SIZE(ssm2518_dapm_widgets),
 727         .dapm_routes = ssm2518_routes,
 728         .num_dapm_routes = ARRAY_SIZE(ssm2518_routes),
 729 };
 730
 731 static bool ssm2518_register_volatile(struct device *dev, unsigned int reg)
 732 {
 733         return false;
 734 }
 735
 736 static const struct regmap_config ssm2518_regmap_config = {
 737         .val_bits = 8,
 738         .reg_bits = 8,
 739
 740         .max_register = SSM2518_REG_DRC_9,
 741         .volatile_reg = ssm2518_register_volatile,
 742
 743         .cache_type = REGCACHE_RBTREE,
 744         .reg_defaults = ssm2518_reg_defaults,
 745         .num_reg_defaults = ARRAY_SIZE(ssm2518_reg_defaults),
 746 };
 747
 748 static int ssm2518_i2c_probe(struct i2c_client *i2c,
 749         const struct i2c_device_id *id)
 750 {
 751         struct ssm2518_platform_data *pdata = i2c->dev.platform_data;
 752         struct ssm2518 *ssm2518;
 753         int ret;
 754
 755         ssm2518 = devm_kzalloc(&i2c->dev, sizeof(*ssm2518), GFP_KERNEL);
 756         if (ssm2518 == NULL)
 757                 return -ENOMEM;
 758
 759         if (pdata) {
 760                 ssm2518->enable_gpio = pdata->enable_gpio;
 761         } else if (i2c->dev.of_node) {
 762                 ssm2518->enable_gpio = of_get_gpio(i2c->dev.of_node, 0);
 763                 if (ssm2518->enable_gpio < 0 && ssm2518->enable_gpio != -ENOENT)
 764                         return ssm2518->enable_gpio;
 765         } else {
 766                 ssm2518->enable_gpio = -1;
 767         }
 768
 769         if (gpio_is_valid(ssm2518->enable_gpio)) {
 770                 ret = devm_gpio_request_one(&i2c->dev, ssm2518->enable_gpio,
 771                                 GPIOF_OUT_INIT_HIGH, "SSM2518 nSD");
 772                 if (ret)
 773                         return ret;
 774         }
 775
 776         i2c_set_clientdata(i2c, ssm2518);
 777
 778         ssm2518->regmap = devm_regmap_init_i2c(i2c, &ssm2518_regmap_config);
 779         if (IS_ERR(ssm2518->regmap))
 780                 return PTR_ERR(ssm2518->regmap);
 781
 782         /*
 783          * The reset bit is obviously volatile, but we need to be able to cache
 784          * the other bits in the register, so we can't just mark the whole
 785          * register as volatile. Since this is the only place where we'll ever
 786          * touch the reset bit just bypass the cache for this operation.
 787          */
 788         regcache_cache_bypass(ssm2518->regmap, true);
 789         ret = regmap_write(ssm2518->regmap, SSM2518_REG_POWER1,
 790                         SSM2518_POWER1_RESET);
 791         regcache_cache_bypass(ssm2518->regmap, false);
 792         if (ret)
 793                 return ret;
 794
 795         ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER2,
 796                                 SSM2518_POWER2_APWDN, 0x00);
 797         if (ret)
 798                 return ret;
 799
 800         ret = ssm2518_set_power(ssm2518, false);
 801         if (ret)
 802                 return ret;
 803
 804         return snd_soc_register_codec(&i2c->dev, &ssm2518_codec_driver,
 805                         &ssm2518_dai, 1);
 806 }
 807
 808 static int ssm2518_i2c_remove(struct i2c_client *client)
 809 {
 810         snd_soc_unregister_codec(&client->dev);
 811         return 0;
 812 }
 813
 814 static const struct i2c_device_id ssm2518_i2c_ids[] = {
 815         { "ssm2518", 0 },
 816         { }
 817 };
 818 MODULE_DEVICE_TABLE(i2c, ssm2518_i2c_ids);
 819
 820 static struct i2c_driver ssm2518_driver = {
 821         .driver = {
 822                 .name = "ssm2518",
 823                 .owner = THIS_MODULE,
 824         },
 825         .probe = ssm2518_i2c_probe,
 826         .remove = ssm2518_i2c_remove,
 827         .id_table = ssm2518_i2c_ids,
 828 };
 829 module_i2c_driver(ssm2518_driver);
 830
 831 MODULE_DESCRIPTION("ASoC SSM2518 driver");
 832 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 833 MODULE_LICENSE("GPL");