sound/soc/codecs/jz4725b.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // JZ4725B CODEC driver
   4 //
   5 // Copyright (C) 2019, Paul Cercueil <paul@crapouillou.net>
   6
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/slab.h>
  11 #include <linux/io.h>
  12 #include <linux/iopoll.h>
  13 #include <linux/regmap.h>
  14 #include <linux/clk.h>
  15
  16 #include <linux/delay.h>
  17
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/initval.h>
  22 #include <sound/soc.h>
  23 #include <sound/tlv.h>
  24
  25 #define ICDC_RGADW_OFFSET               0x00
  26 #define ICDC_RGDATA_OFFSET              0x04
  27
  28 /* ICDC internal register access control register(RGADW) */
  29 #define ICDC_RGADW_RGWR                 BIT(16)
  30
  31 #define ICDC_RGADW_RGADDR_OFFSET        8
  32 #define ICDC_RGADW_RGADDR_MASK          GENMASK(14, ICDC_RGADW_RGADDR_OFFSET)
  33
  34 #define ICDC_RGADW_RGDIN_OFFSET         0
  35 #define ICDC_RGADW_RGDIN_MASK           GENMASK(7, ICDC_RGADW_RGDIN_OFFSET)
  36
  37 /* ICDC internal register data output register (RGDATA)*/
  38 #define ICDC_RGDATA_IRQ                 BIT(8)
  39
  40 #define ICDC_RGDATA_RGDOUT_OFFSET       0
  41 #define ICDC_RGDATA_RGDOUT_MASK         GENMASK(7, ICDC_RGDATA_RGDOUT_OFFSET)
  42
  43 /* JZ internal register space */
  44 enum {
  45         JZ4725B_CODEC_REG_AICR,
  46         JZ4725B_CODEC_REG_CR1,
  47         JZ4725B_CODEC_REG_CR2,
  48         JZ4725B_CODEC_REG_CCR1,
  49         JZ4725B_CODEC_REG_CCR2,
  50         JZ4725B_CODEC_REG_PMR1,
  51         JZ4725B_CODEC_REG_PMR2,
  52         JZ4725B_CODEC_REG_CRR,
  53         JZ4725B_CODEC_REG_ICR,
  54         JZ4725B_CODEC_REG_IFR,
  55         JZ4725B_CODEC_REG_CGR1,
  56         JZ4725B_CODEC_REG_CGR2,
  57         JZ4725B_CODEC_REG_CGR3,
  58         JZ4725B_CODEC_REG_CGR4,
  59         JZ4725B_CODEC_REG_CGR5,
  60         JZ4725B_CODEC_REG_CGR6,
  61         JZ4725B_CODEC_REG_CGR7,
  62         JZ4725B_CODEC_REG_CGR8,
  63         JZ4725B_CODEC_REG_CGR9,
  64         JZ4725B_CODEC_REG_CGR10,
  65         JZ4725B_CODEC_REG_TR1,
  66         JZ4725B_CODEC_REG_TR2,
  67         JZ4725B_CODEC_REG_CR3,
  68         JZ4725B_CODEC_REG_AGC1,
  69         JZ4725B_CODEC_REG_AGC2,
  70         JZ4725B_CODEC_REG_AGC3,
  71         JZ4725B_CODEC_REG_AGC4,
  72         JZ4725B_CODEC_REG_AGC5,
  73 };
  74
  75 #define REG_AICR_CONFIG1_OFFSET         0
  76 #define REG_AICR_CONFIG1_MASK           (0xf << REG_AICR_CONFIG1_OFFSET)
  77
  78 #define REG_CR1_SB_MICBIAS_OFFSET       7
  79 #define REG_CR1_MONO_OFFSET             6
  80 #define REG_CR1_DAC_MUTE_OFFSET         5
  81 #define REG_CR1_HP_DIS_OFFSET           4
  82 #define REG_CR1_DACSEL_OFFSET           3
  83 #define REG_CR1_BYPASS_OFFSET           2
  84
  85 #define REG_CR2_DAC_DEEMP_OFFSET        7
  86 #define REG_CR2_DAC_ADWL_OFFSET         5
  87 #define REG_CR2_DAC_ADWL_MASK           (0x3 << REG_CR2_DAC_ADWL_OFFSET)
  88 #define REG_CR2_ADC_ADWL_OFFSET         3
  89 #define REG_CR2_ADC_ADWL_MASK           (0x3 << REG_CR2_ADC_ADWL_OFFSET)
  90 #define REG_CR2_ADC_HPF_OFFSET          2
  91
  92 #define REG_CR3_SB_MIC1_OFFSET          7
  93 #define REG_CR3_SB_MIC2_OFFSET          6
  94 #define REG_CR3_SIDETONE1_OFFSET        5
  95 #define REG_CR3_SIDETONE2_OFFSET        4
  96 #define REG_CR3_MICDIFF_OFFSET          3
  97 #define REG_CR3_MICSTEREO_OFFSET        2
  98 #define REG_CR3_INSEL_OFFSET            0
  99 #define REG_CR3_INSEL_MASK              (0x3 << REG_CR3_INSEL_OFFSET)
 100
 101 #define REG_CCR1_CONFIG4_OFFSET         0
 102 #define REG_CCR1_CONFIG4_MASK           (0xf << REG_CCR1_CONFIG4_OFFSET)
 103
 104 #define REG_CCR2_DFREQ_OFFSET           4
 105 #define REG_CCR2_DFREQ_MASK             (0xf << REG_CCR2_DFREQ_OFFSET)
 106 #define REG_CCR2_AFREQ_OFFSET           0
 107 #define REG_CCR2_AFREQ_MASK             (0xf << REG_CCR2_AFREQ_OFFSET)
 108
 109 #define REG_PMR1_SB_DAC_OFFSET          7
 110 #define REG_PMR1_SB_OUT_OFFSET          6
 111 #define REG_PMR1_SB_MIX_OFFSET          5
 112 #define REG_PMR1_SB_ADC_OFFSET          4
 113 #define REG_PMR1_SB_LIN_OFFSET          3
 114 #define REG_PMR1_SB_IND_OFFSET          0
 115
 116 #define REG_PMR2_LRGI_OFFSET            7
 117 #define REG_PMR2_RLGI_OFFSET            6
 118 #define REG_PMR2_LRGOD_OFFSET           5
 119 #define REG_PMR2_RLGOD_OFFSET           4
 120 #define REG_PMR2_GIM_OFFSET             3
 121 #define REG_PMR2_SB_MC_OFFSET           2
 122 #define REG_PMR2_SB_OFFSET              1
 123 #define REG_PMR2_SB_SLEEP_OFFSET        0
 124
 125 #define REG_IFR_RAMP_UP_DONE_OFFSET     3
 126 #define REG_IFR_RAMP_DOWN_DONE_OFFSET   2
 127
 128 #define REG_CGR1_GODL_OFFSET            4
 129 #define REG_CGR1_GODL_MASK              (0xf << REG_CGR1_GODL_OFFSET)
 130 #define REG_CGR1_GODR_OFFSET            0
 131 #define REG_CGR1_GODR_MASK              (0xf << REG_CGR1_GODR_OFFSET)
 132
 133 #define REG_CGR2_GO1R_OFFSET            0
 134 #define REG_CGR2_GO1R_MASK              (0x1f << REG_CGR2_GO1R_OFFSET)
 135
 136 #define REG_CGR3_GO1L_OFFSET            0
 137 #define REG_CGR3_GO1L_MASK              (0x1f << REG_CGR3_GO1L_OFFSET)
 138
 139 struct jz_icdc {
 140         struct regmap *regmap;
 141         void __iomem *base;
 142         struct clk *clk;
 143 };
 144
 145 static const SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(jz4725b_dac_tlv, -2250, 0);
 146 static const SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(jz4725b_line_tlv, -1500, 600);
 147
 148 static const struct snd_kcontrol_new jz4725b_codec_controls[] = {
 149         SOC_DOUBLE_TLV("Master Playback Volume",
 150                        JZ4725B_CODEC_REG_CGR1,
 151                        REG_CGR1_GODL_OFFSET,
 152                        REG_CGR1_GODR_OFFSET,
 153                        0xf, 1, jz4725b_dac_tlv),
 154         SOC_DOUBLE_R_TLV("Master Capture Volume",
 155                          JZ4725B_CODEC_REG_CGR3,
 156                          JZ4725B_CODEC_REG_CGR2,
 157                          REG_CGR2_GO1R_OFFSET,
 158                          0x1f, 1, jz4725b_line_tlv),
 159
 160         SOC_SINGLE("Master Playback Switch", JZ4725B_CODEC_REG_CR1,
 161                    REG_CR1_DAC_MUTE_OFFSET, 1, 1),
 162
 163         SOC_SINGLE("Deemphasize Filter Playback Switch",
 164                    JZ4725B_CODEC_REG_CR2,
 165                    REG_CR2_DAC_DEEMP_OFFSET, 1, 0),
 166
 167         SOC_SINGLE("High-Pass Filter Capture Switch",
 168                    JZ4725B_CODEC_REG_CR2,
 169                    REG_CR2_ADC_HPF_OFFSET, 1, 0),
 170 };
 171
 172 static const char * const jz4725b_codec_adc_src_texts[] = {
 173         "Mic 1", "Mic 2", "Line In", "Mixer",
 174 };
 175 static const unsigned int jz4725b_codec_adc_src_values[] = { 0, 1, 2, 3, };
 176 static SOC_VALUE_ENUM_SINGLE_DECL(jz4725b_codec_adc_src_enum,
 177                                   JZ4725B_CODEC_REG_CR3,
 178                                   REG_CR3_INSEL_OFFSET,
 179                                   REG_CR3_INSEL_MASK,
 180                                   jz4725b_codec_adc_src_texts,
 181                                   jz4725b_codec_adc_src_values);
 182 static const struct snd_kcontrol_new jz4725b_codec_adc_src_ctrl =
 183                         SOC_DAPM_ENUM("Route", jz4725b_codec_adc_src_enum);
 184
 185 static const struct snd_kcontrol_new jz4725b_codec_mixer_controls[] = {
 186         SOC_DAPM_SINGLE("Line In Bypass", JZ4725B_CODEC_REG_CR1,
 187                         REG_CR1_BYPASS_OFFSET, 1, 0),
 188 };
 189
 190 static int jz4725b_out_stage_enable(struct snd_soc_dapm_widget *w,
 191                                     struct snd_kcontrol *kcontrol,
 192                                     int event)
 193 {
 194         struct snd_soc_component *codec = snd_soc_dapm_to_component(w->dapm);
 195         struct jz_icdc *icdc = snd_soc_component_get_drvdata(codec);
 196         struct regmap *map = icdc->regmap;
 197         unsigned int val;
 198
 199         switch (event) {
 200         case SND_SOC_DAPM_PRE_PMU:
 201                 return regmap_clear_bits(map, JZ4725B_CODEC_REG_IFR,
 202                                          BIT(REG_IFR_RAMP_UP_DONE_OFFSET));
 203         case SND_SOC_DAPM_POST_PMU:
 204                 return regmap_read_poll_timeout(map, JZ4725B_CODEC_REG_IFR,
 205                                val, val & BIT(REG_IFR_RAMP_UP_DONE_OFFSET),
 206                                100000, 500000);
 207         case SND_SOC_DAPM_PRE_PMD:
 208                 return regmap_clear_bits(map, JZ4725B_CODEC_REG_IFR,
 209                                 BIT(REG_IFR_RAMP_DOWN_DONE_OFFSET));
 210         case SND_SOC_DAPM_POST_PMD:
 211                 return regmap_read_poll_timeout(map, JZ4725B_CODEC_REG_IFR,
 212                                val, val & BIT(REG_IFR_RAMP_DOWN_DONE_OFFSET),
 213                                100000, 500000);
 214         default:
 215                 return -EINVAL;
 216         }
 217 }
 218
 219 static const struct snd_soc_dapm_widget jz4725b_codec_dapm_widgets[] = {
 220         /* DAC */
 221         SND_SOC_DAPM_DAC("DAC", "Playback",
 222                          JZ4725B_CODEC_REG_PMR1, REG_PMR1_SB_DAC_OFFSET, 1),
 223
 224         /* ADC */
 225         SND_SOC_DAPM_ADC("ADC", "Capture",
 226                          JZ4725B_CODEC_REG_PMR1, REG_PMR1_SB_ADC_OFFSET, 1),
 227
 228         SND_SOC_DAPM_MUX("ADC Source", SND_SOC_NOPM, 0, 0,
 229                          &jz4725b_codec_adc_src_ctrl),
 230
 231         /* Mixer */
 232         SND_SOC_DAPM_MIXER("Mixer", JZ4725B_CODEC_REG_PMR1,
 233                            REG_PMR1_SB_MIX_OFFSET, 1,
 234                            jz4725b_codec_mixer_controls,
 235                            ARRAY_SIZE(jz4725b_codec_mixer_controls)),
 236         SND_SOC_DAPM_MIXER("DAC to Mixer", JZ4725B_CODEC_REG_CR1,
 237                            REG_CR1_DACSEL_OFFSET, 0, NULL, 0),
 238
 239         SND_SOC_DAPM_MIXER("Line In", SND_SOC_NOPM, 0, 0, NULL, 0),
 240         SND_SOC_DAPM_MIXER("HP Out", JZ4725B_CODEC_REG_CR1,
 241                            REG_CR1_HP_DIS_OFFSET, 1, NULL, 0),
 242
 243         SND_SOC_DAPM_MIXER("Mic 1", JZ4725B_CODEC_REG_CR3,
 244                            REG_CR3_SB_MIC1_OFFSET, 1, NULL, 0),
 245         SND_SOC_DAPM_MIXER("Mic 2", JZ4725B_CODEC_REG_CR3,
 246                            REG_CR3_SB_MIC2_OFFSET, 1, NULL, 0),
 247
 248         SND_SOC_DAPM_MIXER_E("Out Stage", JZ4725B_CODEC_REG_PMR1,
 249                              REG_PMR1_SB_OUT_OFFSET, 1, NULL, 0,
 250                              jz4725b_out_stage_enable,
 251                              SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
 252                              SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
 253         SND_SOC_DAPM_MIXER("Mixer to ADC", JZ4725B_CODEC_REG_PMR1,
 254                            REG_PMR1_SB_IND_OFFSET, 1, NULL, 0),
 255
 256         SND_SOC_DAPM_SUPPLY("Mic Bias", JZ4725B_CODEC_REG_CR1,
 257                             REG_CR1_SB_MICBIAS_OFFSET, 1, NULL, 0),
 258
 259         /* Pins */
 260         SND_SOC_DAPM_INPUT("MIC1P"),
 261         SND_SOC_DAPM_INPUT("MIC1N"),
 262         SND_SOC_DAPM_INPUT("MIC2P"),
 263         SND_SOC_DAPM_INPUT("MIC2N"),
 264
 265         SND_SOC_DAPM_INPUT("LLINEIN"),
 266         SND_SOC_DAPM_INPUT("RLINEIN"),
 267
 268         SND_SOC_DAPM_OUTPUT("LHPOUT"),
 269         SND_SOC_DAPM_OUTPUT("RHPOUT"),
 270 };
 271
 272 static const struct snd_soc_dapm_route jz4725b_codec_dapm_routes[] = {
 273         {"Mic 1", NULL, "MIC1P"},
 274         {"Mic 1", NULL, "MIC1N"},
 275         {"Mic 2", NULL, "MIC2P"},
 276         {"Mic 2", NULL, "MIC2N"},
 277
 278         {"Line In", NULL, "LLINEIN"},
 279         {"Line In", NULL, "RLINEIN"},
 280
 281         {"Mixer", "Line In Bypass", "Line In"},
 282         {"DAC to Mixer", NULL, "DAC"},
 283         {"Mixer", NULL, "DAC to Mixer"},
 284
 285         {"Mixer to ADC", NULL, "Mixer"},
 286         {"ADC Source", "Mixer", "Mixer to ADC"},
 287         {"ADC Source", "Line In", "Line In"},
 288         {"ADC Source", "Mic 1", "Mic 1"},
 289         {"ADC Source", "Mic 2", "Mic 2"},
 290         {"ADC", NULL, "ADC Source"},
 291
 292         {"Out Stage", NULL, "Mixer"},
 293         {"HP Out", NULL, "Out Stage"},
 294         {"LHPOUT", NULL, "HP Out"},
 295         {"RHPOUT", NULL, "HP Out"},
 296 };
 297
 298 static int jz4725b_codec_set_bias_level(struct snd_soc_component *component,
 299                                         enum snd_soc_bias_level level)
 300 {
 301         struct jz_icdc *icdc = snd_soc_component_get_drvdata(component);
 302         struct regmap *map = icdc->regmap;
 303
 304         switch (level) {
 305         case SND_SOC_BIAS_ON:
 306                 regmap_clear_bits(map, JZ4725B_CODEC_REG_PMR2,
 307                                   BIT(REG_PMR2_SB_SLEEP_OFFSET));
 308                 break;
 309         case SND_SOC_BIAS_PREPARE:
 310                 /* Enable sound hardware */
 311                 regmap_clear_bits(map, JZ4725B_CODEC_REG_PMR2,
 312                                   BIT(REG_PMR2_SB_OFFSET));
 313                 msleep(224);
 314                 break;
 315         case SND_SOC_BIAS_STANDBY:
 316                 regmap_set_bits(map, JZ4725B_CODEC_REG_PMR2,
 317                                 BIT(REG_PMR2_SB_SLEEP_OFFSET));
 318                 break;
 319         case SND_SOC_BIAS_OFF:
 320                 regmap_set_bits(map, JZ4725B_CODEC_REG_PMR2,
 321                                 BIT(REG_PMR2_SB_OFFSET));
 322                 break;
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int jz4725b_codec_dev_probe(struct snd_soc_component *component)
 329 {
 330         struct jz_icdc *icdc = snd_soc_component_get_drvdata(component);
 331         struct regmap *map = icdc->regmap;
 332
 333         clk_prepare_enable(icdc->clk);
 334
 335         /* Write CONFIGn (n=1 to 8) bits.
 336          * The value 0x0f is specified in the datasheet as a requirement.
 337          */
 338         regmap_write(map, JZ4725B_CODEC_REG_AICR,
 339                      0xf << REG_AICR_CONFIG1_OFFSET);
 340         regmap_write(map, JZ4725B_CODEC_REG_CCR1,
 341                      0x0 << REG_CCR1_CONFIG4_OFFSET);
 342
 343         return 0;
 344 }
 345
 346 static void jz4725b_codec_dev_remove(struct snd_soc_component *component)
 347 {
 348         struct jz_icdc *icdc = snd_soc_component_get_drvdata(component);
 349
 350         clk_disable_unprepare(icdc->clk);
 351 }
 352
 353 static const struct snd_soc_component_driver jz4725b_codec = {
 354         .probe                  = jz4725b_codec_dev_probe,
 355         .remove                 = jz4725b_codec_dev_remove,
 356         .set_bias_level         = jz4725b_codec_set_bias_level,
 357         .controls               = jz4725b_codec_controls,
 358         .num_controls           = ARRAY_SIZE(jz4725b_codec_controls),
 359         .dapm_widgets           = jz4725b_codec_dapm_widgets,
 360         .num_dapm_widgets       = ARRAY_SIZE(jz4725b_codec_dapm_widgets),
 361         .dapm_routes            = jz4725b_codec_dapm_routes,
 362         .num_dapm_routes        = ARRAY_SIZE(jz4725b_codec_dapm_routes),
 363         .suspend_bias_off       = 1,
 364         .use_pmdown_time        = 1,
 365 };
 366
 367 static const unsigned int jz4725b_codec_sample_rates[] = {
 368         96000, 48000, 44100, 32000,
 369         24000, 22050, 16000, 12000,
 370         11025, 9600, 8000,
 371 };
 372
 373 static int jz4725b_codec_hw_params(struct snd_pcm_substream *substream,
 374         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 375 {
 376         struct jz_icdc *icdc = snd_soc_component_get_drvdata(dai->component);
 377         unsigned int rate, bit_width;
 378
 379         switch (params_format(params)) {
 380         case SNDRV_PCM_FORMAT_S16_LE:
 381                 bit_width = 0;
 382                 break;
 383         case SNDRV_PCM_FORMAT_S18_3LE:
 384                 bit_width = 1;
 385                 break;
 386         case SNDRV_PCM_FORMAT_S20_3LE:
 387                 bit_width = 2;
 388                 break;
 389         case SNDRV_PCM_FORMAT_S24_3LE:
 390                 bit_width = 3;
 391                 break;
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         for (rate = 0; rate < ARRAY_SIZE(jz4725b_codec_sample_rates); rate++) {
 397                 if (jz4725b_codec_sample_rates[rate] == params_rate(params))
 398                         break;
 399         }
 400
 401         if (rate == ARRAY_SIZE(jz4725b_codec_sample_rates))
 402                 return -EINVAL;
 403
 404         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 405                 regmap_update_bits(icdc->regmap,
 406                                    JZ4725B_CODEC_REG_CR2,
 407                                    REG_CR2_DAC_ADWL_MASK,
 408                                    bit_width << REG_CR2_DAC_ADWL_OFFSET);
 409
 410                 regmap_update_bits(icdc->regmap,
 411                                    JZ4725B_CODEC_REG_CCR2,
 412                                    REG_CCR2_DFREQ_MASK,
 413                                    rate << REG_CCR2_DFREQ_OFFSET);
 414         } else {
 415                 regmap_update_bits(icdc->regmap,
 416                                    JZ4725B_CODEC_REG_CR2,
 417                                    REG_CR2_ADC_ADWL_MASK,
 418                                    bit_width << REG_CR2_ADC_ADWL_OFFSET);
 419
 420                 regmap_update_bits(icdc->regmap,
 421                                    JZ4725B_CODEC_REG_CCR2,
 422                                    REG_CCR2_AFREQ_MASK,
 423                                    rate << REG_CCR2_AFREQ_OFFSET);
 424         }
 425
 426         return 0;
 427 }
 428
 429 static const struct snd_soc_dai_ops jz4725b_codec_dai_ops = {
 430         .hw_params = jz4725b_codec_hw_params,
 431 };
 432
 433 #define JZ_ICDC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S18_3LE | \
 434                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_3LE)
 435
 436 static struct snd_soc_dai_driver jz4725b_codec_dai = {
 437         .name = "jz4725b-hifi",
 438         .playback = {
 439                 .stream_name = "Playback",
 440                 .channels_min = 2,
 441                 .channels_max = 2,
 442                 .rates = SNDRV_PCM_RATE_8000_96000,
 443                 .formats = JZ_ICDC_FORMATS,
 444         },
 445         .capture = {
 446                 .stream_name = "Capture",
 447                 .channels_min = 2,
 448                 .channels_max = 2,
 449                 .rates = SNDRV_PCM_RATE_8000_96000,
 450                 .formats = JZ_ICDC_FORMATS,
 451         },
 452         .ops = &jz4725b_codec_dai_ops,
 453 };
 454
 455 static bool jz4725b_codec_volatile(struct device *dev, unsigned int reg)
 456 {
 457         return reg == JZ4725B_CODEC_REG_IFR;
 458 }
 459
 460 static bool jz4725b_codec_can_access_reg(struct device *dev, unsigned int reg)
 461 {
 462         return (reg != JZ4725B_CODEC_REG_TR1) && (reg != JZ4725B_CODEC_REG_TR2);
 463 }
 464
 465 static int jz4725b_codec_io_wait(struct jz_icdc *icdc)
 466 {
 467         u32 reg;
 468
 469         return readl_poll_timeout(icdc->base + ICDC_RGADW_OFFSET, reg,
 470                                   !(reg & ICDC_RGADW_RGWR), 1000, 10000);
 471 }
 472
 473 static int jz4725b_codec_reg_read(void *context, unsigned int reg,
 474                                   unsigned int *val)
 475 {
 476         struct jz_icdc *icdc = context;
 477         unsigned int i;
 478         u32 tmp;
 479         int ret;
 480
 481         ret = jz4725b_codec_io_wait(icdc);
 482         if (ret)
 483                 return ret;
 484
 485         tmp = readl(icdc->base + ICDC_RGADW_OFFSET);
 486         tmp = (tmp & ~ICDC_RGADW_RGADDR_MASK)
 487             | (reg << ICDC_RGADW_RGADDR_OFFSET);
 488         writel(tmp, icdc->base + ICDC_RGADW_OFFSET);
 489
 490         /* wait 6+ cycles */
 491         for (i = 0; i < 6; i++)
 492                 *val = readl(icdc->base + ICDC_RGDATA_OFFSET) &
 493                         ICDC_RGDATA_RGDOUT_MASK;
 494
 495         return 0;
 496 }
 497
 498 static int jz4725b_codec_reg_write(void *context, unsigned int reg,
 499                                    unsigned int val)
 500 {
 501         struct jz_icdc *icdc = context;
 502         int ret;
 503
 504         ret = jz4725b_codec_io_wait(icdc);
 505         if (ret)
 506                 return ret;
 507
 508         writel(ICDC_RGADW_RGWR | (reg << ICDC_RGADW_RGADDR_OFFSET) | val,
 509                         icdc->base + ICDC_RGADW_OFFSET);
 510
 511         ret = jz4725b_codec_io_wait(icdc);
 512         if (ret)
 513                 return ret;
 514
 515         return 0;
 516 }
 517
 518 static const u8 jz4725b_codec_reg_defaults[] = {
 519         0x0c, 0xaa, 0x78, 0x00, 0x00, 0xff, 0x03, 0x51,
 520         0x3f, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04,
 521         0x04, 0x0a, 0x0a, 0x00, 0x00, 0x00, 0xc0, 0x34,
 522         0x07, 0x44, 0x1f, 0x00,
 523 };
 524
 525 static const struct regmap_config jz4725b_codec_regmap_config = {
 526         .reg_bits = 7,
 527         .val_bits = 8,
 528
 529         .max_register = JZ4725B_CODEC_REG_AGC5,
 530         .volatile_reg = jz4725b_codec_volatile,
 531         .readable_reg = jz4725b_codec_can_access_reg,
 532         .writeable_reg = jz4725b_codec_can_access_reg,
 533
 534         .reg_read = jz4725b_codec_reg_read,
 535         .reg_write = jz4725b_codec_reg_write,
 536
 537         .reg_defaults_raw = jz4725b_codec_reg_defaults,
 538         .num_reg_defaults_raw = ARRAY_SIZE(jz4725b_codec_reg_defaults),
 539         .cache_type = REGCACHE_FLAT,
 540 };
 541
 542 static int jz4725b_codec_probe(struct platform_device *pdev)
 543 {
 544         struct device *dev = &pdev->dev;
 545         struct jz_icdc *icdc;
 546         int ret;
 547
 548         icdc = devm_kzalloc(dev, sizeof(*icdc), GFP_KERNEL);
 549         if (!icdc)
 550                 return -ENOMEM;
 551
 552         icdc->base = devm_platform_ioremap_resource(pdev, 0);
 553         if (IS_ERR(icdc->base))
 554                 return PTR_ERR(icdc->base);
 555
 556         icdc->regmap = devm_regmap_init(dev, NULL, icdc,
 557                                         &jz4725b_codec_regmap_config);
 558         if (IS_ERR(icdc->regmap))
 559                 return PTR_ERR(icdc->regmap);
 560
 561         icdc->clk = devm_clk_get(&pdev->dev, "aic");
 562         if (IS_ERR(icdc->clk))
 563                 return PTR_ERR(icdc->clk);
 564
 565         platform_set_drvdata(pdev, icdc);
 566
 567         ret = devm_snd_soc_register_component(dev, &jz4725b_codec,
 568                                               &jz4725b_codec_dai, 1);
 569         if (ret)
 570                 dev_err(dev, "Failed to register codec\n");
 571
 572         return ret;
 573 }
 574
 575 static const struct of_device_id jz4725b_codec_of_matches[] = {
 576         { .compatible = "ingenic,jz4725b-codec", },
 577         { }
 578 };
 579 MODULE_DEVICE_TABLE(of, jz4725b_codec_of_matches);
 580
 581 static struct platform_driver jz4725b_codec_driver = {
 582         .probe = jz4725b_codec_probe,
 583         .driver = {
 584                 .name = "jz4725b-codec",
 585                 .of_match_table = jz4725b_codec_of_matches,
 586         },
 587 };
 588 module_platform_driver(jz4725b_codec_driver);
 589
 590 MODULE_DESCRIPTION("JZ4725B SoC internal codec driver");
 591 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
 592 MODULE_LICENSE("GPL v2");