sound/soc/sunxi/sun4i-codec.c

   1 /*
   2  * Copyright 2014 Emilio López <emilio@elopez.com.ar>
   3  * Copyright 2014 Jon Smirl <jonsmirl@gmail.com>
   4  * Copyright 2015 Maxime Ripard <maxime.ripard@free-electrons.com>
   5  * Copyright 2015 Adam Sampson <ats@offog.org>
   6  *
   7  * Based on the Allwinner SDK driver, released under the GPL.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/delay.h>
  25 #include <linux/slab.h>
  26 #include <linux/of.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/of_address.h>
  29 #include <linux/clk.h>
  30 #include <linux/regmap.h>
  31 #include <linux/gpio/consumer.h>
  32
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/soc.h>
  37 #include <sound/tlv.h>
  38 #include <sound/initval.h>
  39 #include <sound/dmaengine_pcm.h>
  40
  41 /* Codec DAC register offsets and bit fields */
  42 #define SUN4I_CODEC_DAC_DPC                     (0x00)
  43 #define SUN4I_CODEC_DAC_DPC_EN_DA                       (31)
  44 #define SUN4I_CODEC_DAC_DPC_DVOL                        (12)
  45 #define SUN4I_CODEC_DAC_FIFOC                   (0x04)
  46 #define SUN4I_CODEC_DAC_FIFOC_DAC_FS                    (29)
  47 #define SUN4I_CODEC_DAC_FIFOC_FIR_VERSION               (28)
  48 #define SUN4I_CODEC_DAC_FIFOC_SEND_LASAT                (26)
  49 #define SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE              (24)
  50 #define SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT               (21)
  51 #define SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL             (8)
  52 #define SUN4I_CODEC_DAC_FIFOC_MONO_EN                   (6)
  53 #define SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS            (5)
  54 #define SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN                (4)
  55 #define SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH                (0)
  56 #define SUN4I_CODEC_DAC_FIFOS                   (0x08)
  57 #define SUN4I_CODEC_DAC_TXDATA                  (0x0c)
  58 #define SUN4I_CODEC_DAC_ACTL                    (0x10)
  59 #define SUN4I_CODEC_DAC_ACTL_DACAENR                    (31)
  60 #define SUN4I_CODEC_DAC_ACTL_DACAENL                    (30)
  61 #define SUN4I_CODEC_DAC_ACTL_MIXEN                      (29)
  62 #define SUN4I_CODEC_DAC_ACTL_LDACLMIXS                  (15)
  63 #define SUN4I_CODEC_DAC_ACTL_RDACRMIXS                  (14)
  64 #define SUN4I_CODEC_DAC_ACTL_LDACRMIXS                  (13)
  65 #define SUN4I_CODEC_DAC_ACTL_DACPAS                     (8)
  66 #define SUN4I_CODEC_DAC_ACTL_MIXPAS                     (7)
  67 #define SUN4I_CODEC_DAC_ACTL_PA_MUTE                    (6)
  68 #define SUN4I_CODEC_DAC_ACTL_PA_VOL                     (0)
  69 #define SUN4I_CODEC_DAC_TUNE                    (0x14)
  70 #define SUN4I_CODEC_DAC_DEBUG                   (0x18)
  71
  72 /* Codec ADC register offsets and bit fields */
  73 #define SUN4I_CODEC_ADC_FIFOC                   (0x1c)
  74 #define SUN4I_CODEC_ADC_FIFOC_ADC_FS                    (29)
  75 #define SUN4I_CODEC_ADC_FIFOC_EN_AD                     (28)
  76 #define SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE              (24)
  77 #define SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL             (8)
  78 #define SUN4I_CODEC_ADC_FIFOC_MONO_EN                   (7)
  79 #define SUN4I_CODEC_ADC_FIFOC_RX_SAMPLE_BITS            (6)
  80 #define SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN                (4)
  81 #define SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH                (0)
  82 #define SUN4I_CODEC_ADC_FIFOS                   (0x20)
  83 #define SUN4I_CODEC_ADC_RXDATA                  (0x24)
  84 #define SUN4I_CODEC_ADC_ACTL                    (0x28)
  85 #define SUN4I_CODEC_ADC_ACTL_ADC_R_EN                   (31)
  86 #define SUN4I_CODEC_ADC_ACTL_ADC_L_EN                   (30)
  87 #define SUN4I_CODEC_ADC_ACTL_PREG1EN                    (29)
  88 #define SUN4I_CODEC_ADC_ACTL_PREG2EN                    (28)
  89 #define SUN4I_CODEC_ADC_ACTL_VMICEN                     (27)
  90 #define SUN4I_CODEC_ADC_ACTL_VADCG                      (20)
  91 #define SUN4I_CODEC_ADC_ACTL_ADCIS                      (17)
  92 #define SUN4I_CODEC_ADC_ACTL_PA_EN                      (4)
  93 #define SUN4I_CODEC_ADC_ACTL_DDE                        (3)
  94 #define SUN4I_CODEC_ADC_DEBUG                   (0x2c)
  95
  96 /* Other various ADC registers */
  97 #define SUN4I_CODEC_DAC_TXCNT                   (0x30)
  98 #define SUN4I_CODEC_ADC_RXCNT                   (0x34)
  99 #define SUN4I_CODEC_AC_SYS_VERI                 (0x38)
 100 #define SUN4I_CODEC_AC_MIC_PHONE_CAL            (0x3c)
 101
 102 struct sun4i_codec {
 103         struct device   *dev;
 104         struct regmap   *regmap;
 105         struct clk      *clk_apb;
 106         struct clk      *clk_module;
 107         struct gpio_desc *gpio_pa;
 108
 109         struct snd_dmaengine_dai_dma_data       capture_dma_data;
 110         struct snd_dmaengine_dai_dma_data       playback_dma_data;
 111 };
 112
 113 static void sun4i_codec_start_playback(struct sun4i_codec *scodec)
 114 {
 115         /* Flush TX FIFO */
 116         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 117                            BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
 118                            BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
 119
 120         /* Enable DAC DRQ */
 121         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 122                            BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
 123                            BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN));
 124 }
 125
 126 static void sun4i_codec_stop_playback(struct sun4i_codec *scodec)
 127 {
 128         /* Disable DAC DRQ */
 129         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 130                            BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
 131                            0);
 132 }
 133
 134 static void sun4i_codec_start_capture(struct sun4i_codec *scodec)
 135 {
 136         /* Enable ADC DRQ */
 137         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 138                            BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN),
 139                            BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN));
 140 }
 141
 142 static void sun4i_codec_stop_capture(struct sun4i_codec *scodec)
 143 {
 144         /* Disable ADC DRQ */
 145         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 146                            BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN), 0);
 147 }
 148
 149 static int sun4i_codec_trigger(struct snd_pcm_substream *substream, int cmd,
 150                                struct snd_soc_dai *dai)
 151 {
 152         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 153         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 154
 155         switch (cmd) {
 156         case SNDRV_PCM_TRIGGER_START:
 157         case SNDRV_PCM_TRIGGER_RESUME:
 158         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 159                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 160                         sun4i_codec_start_playback(scodec);
 161                 else
 162                         sun4i_codec_start_capture(scodec);
 163                 break;
 164
 165         case SNDRV_PCM_TRIGGER_STOP:
 166         case SNDRV_PCM_TRIGGER_SUSPEND:
 167         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 168                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 169                         sun4i_codec_stop_playback(scodec);
 170                 else
 171                         sun4i_codec_stop_capture(scodec);
 172                 break;
 173
 174         default:
 175                 return -EINVAL;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int sun4i_codec_prepare_capture(struct snd_pcm_substream *substream,
 182                                        struct snd_soc_dai *dai)
 183 {
 184         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 185         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 186
 187
 188         /* Flush RX FIFO */
 189         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 190                            BIT(SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH),
 191                            BIT(SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH));
 192
 193
 194         /* Set RX FIFO trigger level */
 195         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 196                            0xf << SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL,
 197                            0x7 << SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL);
 198
 199         /*
 200          * FIXME: Undocumented in the datasheet, but
 201          *        Allwinner's code mentions that it is related
 202          *        related to microphone gain
 203          */
 204         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_ACTL,
 205                            0x3 << 25,
 206                            0x1 << 25);
 207
 208         if (of_device_is_compatible(scodec->dev->of_node,
 209                                     "allwinner,sun7i-a20-codec"))
 210                 /* FIXME: Undocumented bits */
 211                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_TUNE,
 212                                    0x3 << 8,
 213                                    0x1 << 8);
 214
 215         /* Fill most significant bits with valid data MSB */
 216         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 217                            BIT(SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE),
 218                            BIT(SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE));
 219
 220         return 0;
 221 }
 222
 223 static int sun4i_codec_prepare_playback(struct snd_pcm_substream *substream,
 224                                         struct snd_soc_dai *dai)
 225 {
 226         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 227         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 228         u32 val;
 229
 230         /* Flush the TX FIFO */
 231         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 232                            BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
 233                            BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
 234
 235         /* Set TX FIFO Empty Trigger Level */
 236         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 237                            0x3f << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL,
 238                            0xf << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL);
 239
 240         if (substream->runtime->rate > 32000)
 241                 /* Use 64 bits FIR filter */
 242                 val = 0;
 243         else
 244                 /* Use 32 bits FIR filter */
 245                 val = BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION);
 246
 247         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 248                            BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION),
 249                            val);
 250
 251         /* Send zeros when we have an underrun */
 252         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 253                            BIT(SUN4I_CODEC_DAC_FIFOC_SEND_LASAT),
 254                            0);
 255
 256         return 0;
 257 };
 258
 259 static int sun4i_codec_prepare(struct snd_pcm_substream *substream,
 260                                struct snd_soc_dai *dai)
 261 {
 262         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 263                 return sun4i_codec_prepare_playback(substream, dai);
 264
 265         return sun4i_codec_prepare_capture(substream, dai);
 266 }
 267
 268 static unsigned long sun4i_codec_get_mod_freq(struct snd_pcm_hw_params *params)
 269 {
 270         unsigned int rate = params_rate(params);
 271
 272         switch (rate) {
 273         case 176400:
 274         case 88200:
 275         case 44100:
 276         case 33075:
 277         case 22050:
 278         case 14700:
 279         case 11025:
 280         case 7350:
 281                 return 22579200;
 282
 283         case 192000:
 284         case 96000:
 285         case 48000:
 286         case 32000:
 287         case 24000:
 288         case 16000:
 289         case 12000:
 290         case 8000:
 291                 return 24576000;
 292
 293         default:
 294                 return 0;
 295         }
 296 }
 297
 298 static int sun4i_codec_get_hw_rate(struct snd_pcm_hw_params *params)
 299 {
 300         unsigned int rate = params_rate(params);
 301
 302         switch (rate) {
 303         case 192000:
 304         case 176400:
 305                 return 6;
 306
 307         case 96000:
 308         case 88200:
 309                 return 7;
 310
 311         case 48000:
 312         case 44100:
 313                 return 0;
 314
 315         case 32000:
 316         case 33075:
 317                 return 1;
 318
 319         case 24000:
 320         case 22050:
 321                 return 2;
 322
 323         case 16000:
 324         case 14700:
 325                 return 3;
 326
 327         case 12000:
 328         case 11025:
 329                 return 4;
 330
 331         case 8000:
 332         case 7350:
 333                 return 5;
 334
 335         default:
 336                 return -EINVAL;
 337         }
 338 }
 339
 340 static int sun4i_codec_hw_params_capture(struct sun4i_codec *scodec,
 341                                          struct snd_pcm_hw_params *params,
 342                                          unsigned int hwrate)
 343 {
 344         /* Set ADC sample rate */
 345         regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 346                            7 << SUN4I_CODEC_ADC_FIFOC_ADC_FS,
 347                            hwrate << SUN4I_CODEC_ADC_FIFOC_ADC_FS);
 348
 349         /* Set the number of channels we want to use */
 350         if (params_channels(params) == 1)
 351                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 352                                    BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN),
 353                                    BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN));
 354         else
 355                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
 356                                    BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN), 0);
 357
 358         return 0;
 359 }
 360
 361 static int sun4i_codec_hw_params_playback(struct sun4i_codec *scodec,
 362                                           struct snd_pcm_hw_params *params,
 363                                           unsigned int hwrate)
 364 {
 365         u32 val;
 366
 367         /* Set DAC sample rate */
 368         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 369                            7 << SUN4I_CODEC_DAC_FIFOC_DAC_FS,
 370                            hwrate << SUN4I_CODEC_DAC_FIFOC_DAC_FS);
 371
 372         /* Set the number of channels we want to use */
 373         if (params_channels(params) == 1)
 374                 val = BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN);
 375         else
 376                 val = 0;
 377
 378         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 379                            BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN),
 380                            val);
 381
 382         /* Set the number of sample bits to either 16 or 24 bits */
 383         if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min == 32) {
 384                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 385                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
 386                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS));
 387
 388                 /* Set TX FIFO mode to padding the LSBs with 0 */
 389                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 390                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
 391                                    0);
 392
 393                 scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 394         } else {
 395                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 396                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
 397                                    0);
 398
 399                 /* Set TX FIFO mode to repeat the MSB */
 400                 regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 401                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
 402                                    BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE));
 403
 404                 scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 405         }
 406
 407         return 0;
 408 }
 409
 410 static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
 411                                  struct snd_pcm_hw_params *params,
 412                                  struct snd_soc_dai *dai)
 413 {
 414         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 415         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 416         unsigned long clk_freq;
 417         int ret, hwrate;
 418
 419         clk_freq = sun4i_codec_get_mod_freq(params);
 420         if (!clk_freq)
 421                 return -EINVAL;
 422
 423         ret = clk_set_rate(scodec->clk_module, clk_freq);
 424         if (ret)
 425                 return ret;
 426
 427         hwrate = sun4i_codec_get_hw_rate(params);
 428         if (hwrate < 0)
 429                 return hwrate;
 430
 431         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 432                 return sun4i_codec_hw_params_playback(scodec, params,
 433                                                       hwrate);
 434
 435         return sun4i_codec_hw_params_capture(scodec, params,
 436                                              hwrate);
 437 }
 438
 439 static int sun4i_codec_startup(struct snd_pcm_substream *substream,
 440                                struct snd_soc_dai *dai)
 441 {
 442         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 443         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 444
 445         /*
 446          * Stop issuing DRQ when we have room for less than 16 samples
 447          * in our TX FIFO
 448          */
 449         regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
 450                            3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT,
 451                            3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT);
 452
 453         return clk_prepare_enable(scodec->clk_module);
 454 }
 455
 456 static void sun4i_codec_shutdown(struct snd_pcm_substream *substream,
 457                                  struct snd_soc_dai *dai)
 458 {
 459         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 460         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
 461
 462         clk_disable_unprepare(scodec->clk_module);
 463 }
 464
 465 static const struct snd_soc_dai_ops sun4i_codec_dai_ops = {
 466         .startup        = sun4i_codec_startup,
 467         .shutdown       = sun4i_codec_shutdown,
 468         .trigger        = sun4i_codec_trigger,
 469         .hw_params      = sun4i_codec_hw_params,
 470         .prepare        = sun4i_codec_prepare,
 471 };
 472
 473 static struct snd_soc_dai_driver sun4i_codec_dai = {
 474         .name   = "Codec",
 475         .ops    = &sun4i_codec_dai_ops,
 476         .playback = {
 477                 .stream_name    = "Codec Playback",
 478                 .channels_min   = 1,
 479                 .channels_max   = 2,
 480                 .rate_min       = 8000,
 481                 .rate_max       = 192000,
 482                 .rates          = SNDRV_PCM_RATE_8000_48000 |
 483                                   SNDRV_PCM_RATE_96000 |
 484                                   SNDRV_PCM_RATE_192000,
 485                 .formats        = SNDRV_PCM_FMTBIT_S16_LE |
 486                                   SNDRV_PCM_FMTBIT_S32_LE,
 487                 .sig_bits       = 24,
 488         },
 489         .capture = {
 490                 .stream_name    = "Codec Capture",
 491                 .channels_min   = 1,
 492                 .channels_max   = 2,
 493                 .rate_min       = 8000,
 494                 .rate_max       = 192000,
 495                 .rates          = SNDRV_PCM_RATE_8000_48000 |
 496                                   SNDRV_PCM_RATE_96000 |
 497                                   SNDRV_PCM_RATE_192000 |
 498                                   SNDRV_PCM_RATE_KNOT,
 499                 .formats        = SNDRV_PCM_FMTBIT_S16_LE |
 500                                   SNDRV_PCM_FMTBIT_S32_LE,
 501                 .sig_bits       = 24,
 502         },
 503 };
 504
 505 /*** Codec ***/
 506 static const struct snd_kcontrol_new sun4i_codec_pa_mute =
 507         SOC_DAPM_SINGLE("Switch", SUN4I_CODEC_DAC_ACTL,
 508                         SUN4I_CODEC_DAC_ACTL_PA_MUTE, 1, 0);
 509
 510 static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
 511
 512 static const struct snd_kcontrol_new sun4i_codec_widgets[] = {
 513         SOC_SINGLE_TLV("Power Amplifier Volume", SUN4I_CODEC_DAC_ACTL,
 514                        SUN4I_CODEC_DAC_ACTL_PA_VOL, 0x3F, 0,
 515                        sun4i_codec_pa_volume_scale),
 516 };
 517
 518 static const struct snd_kcontrol_new sun4i_codec_left_mixer_controls[] = {
 519         SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
 520                         SUN4I_CODEC_DAC_ACTL_LDACLMIXS, 1, 0),
 521 };
 522
 523 static const struct snd_kcontrol_new sun4i_codec_right_mixer_controls[] = {
 524         SOC_DAPM_SINGLE("Right DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
 525                         SUN4I_CODEC_DAC_ACTL_RDACRMIXS, 1, 0),
 526         SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
 527                         SUN4I_CODEC_DAC_ACTL_LDACRMIXS, 1, 0),
 528 };
 529
 530 static const struct snd_kcontrol_new sun4i_codec_pa_mixer_controls[] = {
 531         SOC_DAPM_SINGLE("DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
 532                         SUN4I_CODEC_DAC_ACTL_DACPAS, 1, 0),
 533         SOC_DAPM_SINGLE("Mixer Playback Switch", SUN4I_CODEC_DAC_ACTL,
 534                         SUN4I_CODEC_DAC_ACTL_MIXPAS, 1, 0),
 535 };
 536
 537 static const struct snd_soc_dapm_widget sun4i_codec_codec_dapm_widgets[] = {
 538         /* Digital parts of the ADCs */
 539         SND_SOC_DAPM_SUPPLY("ADC", SUN4I_CODEC_ADC_FIFOC,
 540                             SUN4I_CODEC_ADC_FIFOC_EN_AD, 0,
 541                             NULL, 0),
 542
 543         /* Digital parts of the DACs */
 544         SND_SOC_DAPM_SUPPLY("DAC", SUN4I_CODEC_DAC_DPC,
 545                             SUN4I_CODEC_DAC_DPC_EN_DA, 0,
 546                             NULL, 0),
 547
 548         /* Analog parts of the ADCs */
 549         SND_SOC_DAPM_ADC("Left ADC", "Codec Capture", SUN4I_CODEC_ADC_ACTL,
 550                          SUN4I_CODEC_ADC_ACTL_ADC_L_EN, 0),
 551         SND_SOC_DAPM_ADC("Right ADC", "Codec Capture", SUN4I_CODEC_ADC_ACTL,
 552                          SUN4I_CODEC_ADC_ACTL_ADC_R_EN, 0),
 553
 554         /* Analog parts of the DACs */
 555         SND_SOC_DAPM_DAC("Left DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
 556                          SUN4I_CODEC_DAC_ACTL_DACAENL, 0),
 557         SND_SOC_DAPM_DAC("Right DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
 558                          SUN4I_CODEC_DAC_ACTL_DACAENR, 0),
 559
 560         /* Mixers */
 561         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
 562                            sun4i_codec_left_mixer_controls,
 563                            ARRAY_SIZE(sun4i_codec_left_mixer_controls)),
 564         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
 565                            sun4i_codec_right_mixer_controls,
 566                            ARRAY_SIZE(sun4i_codec_right_mixer_controls)),
 567
 568         /* Global Mixer Enable */
 569         SND_SOC_DAPM_SUPPLY("Mixer Enable", SUN4I_CODEC_DAC_ACTL,
 570                             SUN4I_CODEC_DAC_ACTL_MIXEN, 0, NULL, 0),
 571
 572         /* VMIC */
 573         SND_SOC_DAPM_SUPPLY("VMIC", SUN4I_CODEC_ADC_ACTL,
 574                             SUN4I_CODEC_ADC_ACTL_VMICEN, 0, NULL, 0),
 575
 576         /* Mic Pre-Amplifiers */
 577         SND_SOC_DAPM_PGA("MIC1 Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
 578                          SUN4I_CODEC_ADC_ACTL_PREG1EN, 0, NULL, 0),
 579
 580         /* Power Amplifier */
 581         SND_SOC_DAPM_MIXER("Power Amplifier", SUN4I_CODEC_ADC_ACTL,
 582                            SUN4I_CODEC_ADC_ACTL_PA_EN, 0,
 583                            sun4i_codec_pa_mixer_controls,
 584                            ARRAY_SIZE(sun4i_codec_pa_mixer_controls)),
 585         SND_SOC_DAPM_SWITCH("Power Amplifier Mute", SND_SOC_NOPM, 0, 0,
 586                             &sun4i_codec_pa_mute),
 587
 588         SND_SOC_DAPM_INPUT("Mic1"),
 589
 590         SND_SOC_DAPM_OUTPUT("HP Right"),
 591         SND_SOC_DAPM_OUTPUT("HP Left"),
 592 };
 593
 594 static const struct snd_soc_dapm_route sun4i_codec_codec_dapm_routes[] = {
 595         /* Left ADC / DAC Routes */
 596         { "Left ADC", NULL, "ADC" },
 597         { "Left DAC", NULL, "DAC" },
 598
 599         /* Right ADC / DAC Routes */
 600         { "Right ADC", NULL, "ADC" },
 601         { "Right DAC", NULL, "DAC" },
 602
 603         /* Right Mixer Routes */
 604         { "Right Mixer", NULL, "Mixer Enable" },
 605         { "Right Mixer", "Left DAC Playback Switch", "Left DAC" },
 606         { "Right Mixer", "Right DAC Playback Switch", "Right DAC" },
 607
 608         /* Left Mixer Routes */
 609         { "Left Mixer", NULL, "Mixer Enable" },
 610         { "Left Mixer", "Left DAC Playback Switch", "Left DAC" },
 611
 612         /* Power Amplifier Routes */
 613         { "Power Amplifier", "Mixer Playback Switch", "Left Mixer" },
 614         { "Power Amplifier", "Mixer Playback Switch", "Right Mixer" },
 615         { "Power Amplifier", "DAC Playback Switch", "Left DAC" },
 616         { "Power Amplifier", "DAC Playback Switch", "Right DAC" },
 617
 618         /* Headphone Output Routes */
 619         { "Power Amplifier Mute", "Switch", "Power Amplifier" },
 620         { "HP Right", NULL, "Power Amplifier Mute" },
 621         { "HP Left", NULL, "Power Amplifier Mute" },
 622
 623         /* Mic1 Routes */
 624         { "Left ADC", NULL, "MIC1 Pre-Amplifier" },
 625         { "Right ADC", NULL, "MIC1 Pre-Amplifier" },
 626         { "MIC1 Pre-Amplifier", NULL, "Mic1"},
 627         { "Mic1", NULL, "VMIC" },
 628 };
 629
 630 static struct snd_soc_codec_driver sun4i_codec_codec = {
 631         .controls               = sun4i_codec_widgets,
 632         .num_controls           = ARRAY_SIZE(sun4i_codec_widgets),
 633         .dapm_widgets           = sun4i_codec_codec_dapm_widgets,
 634         .num_dapm_widgets       = ARRAY_SIZE(sun4i_codec_codec_dapm_widgets),
 635         .dapm_routes            = sun4i_codec_codec_dapm_routes,
 636         .num_dapm_routes        = ARRAY_SIZE(sun4i_codec_codec_dapm_routes),
 637 };
 638
 639 static const struct snd_soc_component_driver sun4i_codec_component = {
 640         .name = "sun4i-codec",
 641 };
 642
 643 #define SUN4I_CODEC_RATES       SNDRV_PCM_RATE_8000_192000
 644 #define SUN4I_CODEC_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | \
 645                                  SNDRV_PCM_FMTBIT_S32_LE)
 646
 647 static int sun4i_codec_dai_probe(struct snd_soc_dai *dai)
 648 {
 649         struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
 650         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
 651
 652         snd_soc_dai_init_dma_data(dai, &scodec->playback_dma_data,
 653                                   &scodec->capture_dma_data);
 654
 655         return 0;
 656 }
 657
 658 static struct snd_soc_dai_driver dummy_cpu_dai = {
 659         .name   = "sun4i-codec-cpu-dai",
 660         .probe  = sun4i_codec_dai_probe,
 661         .playback = {
 662                 .stream_name    = "Playback",
 663                 .channels_min   = 1,
 664                 .channels_max   = 2,
 665                 .rates          = SUN4I_CODEC_RATES,
 666                 .formats        = SUN4I_CODEC_FORMATS,
 667                 .sig_bits       = 24,
 668         },
 669         .capture = {
 670                 .stream_name    = "Capture",
 671                 .channels_min   = 1,
 672                 .channels_max   = 2,
 673                 .rates          = SUN4I_CODEC_RATES,
 674                 .formats        = SUN4I_CODEC_FORMATS,
 675                 .sig_bits       = 24,
 676          },
 677 };
 678
 679 static const struct regmap_config sun4i_codec_regmap_config = {
 680         .reg_bits       = 32,
 681         .reg_stride     = 4,
 682         .val_bits       = 32,
 683         .max_register   = SUN4I_CODEC_AC_MIC_PHONE_CAL,
 684 };
 685
 686 static const struct of_device_id sun4i_codec_of_match[] = {
 687         { .compatible = "allwinner,sun4i-a10-codec" },
 688         { .compatible = "allwinner,sun7i-a20-codec" },
 689         {}
 690 };
 691 MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);
 692
 693 static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev,
 694                                                         int *num_links)
 695 {
 696         struct snd_soc_dai_link *link = devm_kzalloc(dev, sizeof(*link),
 697                                                      GFP_KERNEL);
 698         if (!link)
 699                 return NULL;
 700
 701         link->name              = "cdc";
 702         link->stream_name       = "CDC PCM";
 703         link->codec_dai_name    = "Codec";
 704         link->cpu_dai_name      = dev_name(dev);
 705         link->codec_name        = dev_name(dev);
 706         link->platform_name     = dev_name(dev);
 707         link->dai_fmt           = SND_SOC_DAIFMT_I2S;
 708
 709         *num_links = 1;
 710
 711         return link;
 712 };
 713
 714 static int sun4i_codec_spk_event(struct snd_soc_dapm_widget *w,
 715                                  struct snd_kcontrol *k, int event)
 716 {
 717         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(w->dapm->card);
 718
 719         if (scodec->gpio_pa)
 720                 gpiod_set_value_cansleep(scodec->gpio_pa,
 721                                          !!SND_SOC_DAPM_EVENT_ON(event));
 722
 723         return 0;
 724 }
 725
 726 static const struct snd_soc_dapm_widget sun4i_codec_card_dapm_widgets[] = {
 727         SND_SOC_DAPM_SPK("Speaker", sun4i_codec_spk_event),
 728 };
 729
 730 static const struct snd_soc_dapm_route sun4i_codec_card_dapm_routes[] = {
 731         { "Speaker", NULL, "HP Right" },
 732         { "Speaker", NULL, "HP Left" },
 733 };
 734
 735 static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
 736 {
 737         struct snd_soc_card *card;
 738
 739         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 740         if (!card)
 741                 return NULL;
 742
 743         card->dai_link = sun4i_codec_create_link(dev, &card->num_links);
 744         if (!card->dai_link)
 745                 return NULL;
 746
 747         card->dev               = dev;
 748         card->name              = "sun4i-codec";
 749         card->dapm_widgets      = sun4i_codec_card_dapm_widgets;
 750         card->num_dapm_widgets  = ARRAY_SIZE(sun4i_codec_card_dapm_widgets);
 751         card->dapm_routes       = sun4i_codec_card_dapm_routes;
 752         card->num_dapm_routes   = ARRAY_SIZE(sun4i_codec_card_dapm_routes);
 753
 754         return card;
 755 };
 756
 757 static int sun4i_codec_probe(struct platform_device *pdev)
 758 {
 759         struct snd_soc_card *card;
 760         struct sun4i_codec *scodec;
 761         struct resource *res;
 762         void __iomem *base;
 763         int ret;
 764
 765         scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL);
 766         if (!scodec)
 767                 return -ENOMEM;
 768
 769         scodec->dev = &pdev->dev;
 770
 771         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 772         base = devm_ioremap_resource(&pdev->dev, res);
 773         if (IS_ERR(base)) {
 774                 dev_err(&pdev->dev, "Failed to map the registers\n");
 775                 return PTR_ERR(base);
 776         }
 777
 778         scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 779                                              &sun4i_codec_regmap_config);
 780         if (IS_ERR(scodec->regmap)) {
 781                 dev_err(&pdev->dev, "Failed to create our regmap\n");
 782                 return PTR_ERR(scodec->regmap);
 783         }
 784
 785         /* Get the clocks from the DT */
 786         scodec->clk_apb = devm_clk_get(&pdev->dev, "apb");
 787         if (IS_ERR(scodec->clk_apb)) {
 788                 dev_err(&pdev->dev, "Failed to get the APB clock\n");
 789                 return PTR_ERR(scodec->clk_apb);
 790         }
 791
 792         scodec->clk_module = devm_clk_get(&pdev->dev, "codec");
 793         if (IS_ERR(scodec->clk_module)) {
 794                 dev_err(&pdev->dev, "Failed to get the module clock\n");
 795                 return PTR_ERR(scodec->clk_module);
 796         }
 797
 798         /* Enable the bus clock */
 799         if (clk_prepare_enable(scodec->clk_apb)) {
 800                 dev_err(&pdev->dev, "Failed to enable the APB clock\n");
 801                 return -EINVAL;
 802         }
 803
 804         scodec->gpio_pa = devm_gpiod_get_optional(&pdev->dev, "allwinner,pa",
 805                                                   GPIOD_OUT_LOW);
 806         if (IS_ERR(scodec->gpio_pa)) {
 807                 ret = PTR_ERR(scodec->gpio_pa);
 808                 if (ret != -EPROBE_DEFER)
 809                         dev_err(&pdev->dev, "Failed to get pa gpio: %d\n", ret);
 810                 return ret;
 811         }
 812
 813         /* DMA configuration for TX FIFO */
 814         scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;
 815         scodec->playback_dma_data.maxburst = 4;
 816         scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 817
 818         /* DMA configuration for RX FIFO */
 819         scodec->capture_dma_data.addr = res->start + SUN4I_CODEC_ADC_RXDATA;
 820         scodec->capture_dma_data.maxburst = 4;
 821         scodec->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 822
 823         ret = snd_soc_register_codec(&pdev->dev, &sun4i_codec_codec,
 824                                      &sun4i_codec_dai, 1);
 825         if (ret) {
 826                 dev_err(&pdev->dev, "Failed to register our codec\n");
 827                 goto err_clk_disable;
 828         }
 829
 830         ret = devm_snd_soc_register_component(&pdev->dev,
 831                                               &sun4i_codec_component,
 832                                               &dummy_cpu_dai, 1);
 833         if (ret) {
 834                 dev_err(&pdev->dev, "Failed to register our DAI\n");
 835                 goto err_unregister_codec;
 836         }
 837
 838         ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
 839         if (ret) {
 840                 dev_err(&pdev->dev, "Failed to register against DMAEngine\n");
 841                 goto err_unregister_codec;
 842         }
 843
 844         card = sun4i_codec_create_card(&pdev->dev);
 845         if (!card) {
 846                 dev_err(&pdev->dev, "Failed to create our card\n");
 847                 goto err_unregister_codec;
 848         }
 849
 850         platform_set_drvdata(pdev, card);
 851         snd_soc_card_set_drvdata(card, scodec);
 852
 853         ret = snd_soc_register_card(card);
 854         if (ret) {
 855                 dev_err(&pdev->dev, "Failed to register our card\n");
 856                 goto err_unregister_codec;
 857         }
 858
 859         return 0;
 860
 861 err_unregister_codec:
 862         snd_soc_unregister_codec(&pdev->dev);
 863 err_clk_disable:
 864         clk_disable_unprepare(scodec->clk_apb);
 865         return ret;
 866 }
 867
 868 static int sun4i_codec_remove(struct platform_device *pdev)
 869 {
 870         struct snd_soc_card *card = platform_get_drvdata(pdev);
 871         struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
 872
 873         snd_soc_unregister_card(card);
 874         snd_soc_unregister_codec(&pdev->dev);
 875         clk_disable_unprepare(scodec->clk_apb);
 876
 877         return 0;
 878 }
 879
 880 static struct platform_driver sun4i_codec_driver = {
 881         .driver = {
 882                 .name = "sun4i-codec",
 883                 .of_match_table = sun4i_codec_of_match,
 884         },
 885         .probe = sun4i_codec_probe,
 886         .remove = sun4i_codec_remove,
 887 };
 888 module_platform_driver(sun4i_codec_driver);
 889
 890 MODULE_DESCRIPTION("Allwinner A10 codec driver");
 891 MODULE_AUTHOR("Emilio López <emilio@elopez.com.ar>");
 892 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
 893 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
 894 MODULE_LICENSE("GPL");