sound/soc/sh/rcar/src.c

   1 /*
   2  * Renesas R-Car SRC support
   3  *
   4  * Copyright (C) 2013 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include "rsnd.h"
  12
  13 #define SRC_NAME "src"
  14
  15 /* SRCx_STATUS */
  16 #define OUF_SRCO        ((1 << 12) | (1 << 13))
  17 #define OUF_SRCI        ((1 <<  9) | (1 <<  8))
  18
  19 /* SCU_SYSTEM_STATUS0/1 */
  20 #define OUF_SRC(id)     ((1 << (id + 16)) | (1 << id))
  21
  22 struct rsnd_src {
  23         struct rsnd_src_platform_info *info; /* rcar_snd.h */
  24         struct rsnd_mod mod;
  25         int err;
  26 };
  27
  28 #define RSND_SRC_NAME_SIZE 16
  29
  30 #define rsnd_src_convert_rate(p) ((p)->info->convert_rate)
  31 #define rsnd_mod_to_src(_mod)                           \
  32         container_of((_mod), struct rsnd_src, mod)
  33 #define rsnd_src_dma_available(src) \
  34         rsnd_dma_available(rsnd_mod_to_dma(&(src)->mod))
  35
  36 #define for_each_rsnd_src(pos, priv, i)                         \
  37         for ((i) = 0;                                           \
  38              ((i) < rsnd_src_nr(priv)) &&                       \
  39              ((pos) = (struct rsnd_src *)(priv)->src + i);      \
  40              i++)
  41
  42
  43 /*
  44  *              image of SRC (Sampling Rate Converter)
  45  *
  46  * 96kHz   <-> +-----+  48kHz   +-----+  48kHz  +-------+
  47  * 48kHz   <-> | SRC | <------> | SSI | <-----> | codec |
  48  * 44.1kHz <-> +-----+          +-----+         +-------+
  49  * ...
  50  *
  51  */
  52
  53 /*
  54  * src.c is caring...
  55  *
  56  * Gen1
  57  *
  58  * [mem] -> [SRU] -> [SSI]
  59  *        |--------|
  60  *
  61  * Gen2
  62  *
  63  * [mem] -> [SRC] -> [SSIU] -> [SSI]
  64  *        |-----------------|
  65  */
  66
  67 /*
  68  *      How to use SRC bypass mode for debugging
  69  *
  70  * SRC has bypass mode, and it is useful for debugging.
  71  * In Gen2 case,
  72  * SRCm_MODE controls whether SRC is used or not
  73  * SSI_MODE0 controls whether SSIU which receives SRC data
  74  * is used or not.
  75  * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
  76  * but SRC bypass mode needs SSI_MODE0 only.
  77  *
  78  * This driver request
  79  * struct rsnd_src_platform_info {
  80  *      u32 convert_rate;
  81  *      int dma_id;
  82  * }
  83  *
  84  * rsnd_src_convert_rate() indicates
  85  * above convert_rate, and it controls
  86  * whether SRC is used or not.
  87  *
  88  * ex) doesn't use SRC
  89  * static struct rsnd_dai_platform_info rsnd_dai = {
  90  *      .playback = { .ssi = &rsnd_ssi[0], },
  91  * };
  92  *
  93  * ex) uses SRC
  94  * static struct rsnd_src_platform_info rsnd_src[] = {
  95  *      RSND_SCU(48000, 0),
  96  *      ...
  97  * };
  98  * static struct rsnd_dai_platform_info rsnd_dai = {
  99  *      .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
 100  * };
 101  *
 102  * ex) uses SRC bypass mode
 103  * static struct rsnd_src_platform_info rsnd_src[] = {
 104  *      RSND_SCU(0, 0),
 105  *      ...
 106  * };
 107  * static struct rsnd_dai_platform_info rsnd_dai = {
 108  *      .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
 109  * };
 110  *
 111  */
 112
 113 /*
 114  *              Gen1/Gen2 common functions
 115  */
 116 int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
 117                         int use_busif)
 118 {
 119         struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
 120         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 121         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 122         int ssi_id = rsnd_mod_id(ssi_mod);
 123
 124         /*
 125          * SSI_MODE0
 126          */
 127         rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
 128                       !use_busif << ssi_id);
 129
 130         /*
 131          * SSI_MODE1
 132          */
 133         if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
 134                 int shift = -1;
 135                 switch (ssi_id) {
 136                 case 1:
 137                         shift = 0;
 138                         break;
 139                 case 2:
 140                         shift = 2;
 141                         break;
 142                 case 4:
 143                         shift = 16;
 144                         break;
 145                 }
 146
 147                 if (shift >= 0)
 148                         rsnd_mod_bset(ssi_mod, SSI_MODE1,
 149                                       0x3 << shift,
 150                                       rsnd_rdai_is_clk_master(rdai) ?
 151                                       0x2 << shift : 0x1 << shift);
 152         }
 153
 154         /*
 155          * DMA settings for SSIU
 156          */
 157         if (use_busif) {
 158                 u32 val = 0x76543210;
 159                 u32 mask = ~0;
 160
 161                 rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR,
 162                                rsnd_get_adinr(ssi_mod));
 163                 rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE,  1);
 164                 rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1);
 165
 166                 mask <<= runtime->channels * 4;
 167                 val = val & mask;
 168
 169                 switch (runtime->sample_bits) {
 170                 case 16:
 171                         val |= 0x67452301 & ~mask;
 172                         break;
 173                 case 32:
 174                         val |= 0x76543210 & ~mask;
 175                         break;
 176                 }
 177                 rsnd_mod_write(ssi_mod, BUSIF_DALIGN, val);
 178
 179         }
 180
 181         return 0;
 182 }
 183
 184 int rsnd_src_ssiu_stop(struct rsnd_mod *ssi_mod)
 185 {
 186         /*
 187          * DMA settings for SSIU
 188          */
 189         rsnd_mod_write(ssi_mod, SSI_CTRL, 0);
 190
 191         return 0;
 192 }
 193
 194 int rsnd_src_ssi_irq_enable(struct rsnd_mod *ssi_mod)
 195 {
 196         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 197
 198         if (rsnd_is_gen1(priv))
 199                 return 0;
 200
 201         /* enable SSI interrupt if Gen2 */
 202         if (rsnd_ssi_is_dma_mode(ssi_mod))
 203                 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0e000000);
 204         else
 205                 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0f000000);
 206
 207         return 0;
 208 }
 209
 210 int rsnd_src_ssi_irq_disable(struct rsnd_mod *ssi_mod)
 211 {
 212         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 213
 214         if (rsnd_is_gen1(priv))
 215                 return 0;
 216
 217         /* disable SSI interrupt if Gen2 */
 218         rsnd_mod_write(ssi_mod, INT_ENABLE, 0x00000000);
 219
 220         return 0;
 221 }
 222
 223 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
 224                                    struct rsnd_dai_stream *io,
 225                                    struct snd_pcm_runtime *runtime)
 226 {
 227         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 228         struct rsnd_src *src;
 229         unsigned int rate = 0;
 230
 231         if (src_mod) {
 232                 src = rsnd_mod_to_src(src_mod);
 233
 234                 /*
 235                  * return convert rate if SRC is used,
 236                  * otherwise, return runtime->rate as usual
 237                  */
 238                 rate = rsnd_src_convert_rate(src);
 239         }
 240
 241         if (!rate)
 242                 rate = runtime->rate;
 243
 244         return rate;
 245 }
 246
 247 static int rsnd_src_set_convert_rate(struct rsnd_mod *mod)
 248 {
 249         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 250         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 251         struct rsnd_src *src = rsnd_mod_to_src(mod);
 252         u32 convert_rate = rsnd_src_convert_rate(src);
 253         u32 fsrate = 0;
 254
 255         if (convert_rate)
 256                 fsrate = 0x0400000 / convert_rate * runtime->rate;
 257
 258         /* set/clear soft reset */
 259         rsnd_mod_write(mod, SRC_SWRSR, 0);
 260         rsnd_mod_write(mod, SRC_SWRSR, 1);
 261
 262         /* Set channel number and output bit length */
 263         rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod));
 264
 265         /* Enable the initial value of IFS */
 266         if (fsrate) {
 267                 rsnd_mod_write(mod, SRC_IFSCR, 1);
 268
 269                 /* Set initial value of IFS */
 270                 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
 271         }
 272
 273         /* use DMA transfer */
 274         rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
 275
 276         return 0;
 277 }
 278
 279 static int rsnd_src_init(struct rsnd_mod *mod)
 280 {
 281         struct rsnd_src *src = rsnd_mod_to_src(mod);
 282
 283         rsnd_mod_hw_start(mod);
 284
 285         src->err = 0;
 286
 287         /*
 288          * Initialize the operation of the SRC internal circuits
 289          * see rsnd_src_start()
 290          */
 291         rsnd_mod_write(mod, SRC_SRCIR, 1);
 292
 293         return 0;
 294 }
 295
 296 static int rsnd_src_quit(struct rsnd_mod *mod,
 297                          struct rsnd_priv *priv)
 298 {
 299         struct rsnd_src *src = rsnd_mod_to_src(mod);
 300         struct device *dev = rsnd_priv_to_dev(priv);
 301
 302         rsnd_mod_hw_stop(mod);
 303
 304         if (src->err)
 305                 dev_warn(dev, "%s[%d] under/over flow err = %d\n",
 306                          rsnd_mod_name(mod), rsnd_mod_id(mod), src->err);
 307
 308         return 0;
 309 }
 310
 311 static int rsnd_src_start(struct rsnd_mod *mod)
 312 {
 313         /*
 314          * Cancel the initialization and operate the SRC function
 315          * see rsnd_src_init()
 316          */
 317         rsnd_mod_write(mod, SRC_SRCIR, 0);
 318
 319         return 0;
 320 }
 321
 322 static int rsnd_src_stop(struct rsnd_mod *mod)
 323 {
 324         /* nothing to do */
 325         return 0;
 326 }
 327
 328 /*
 329  *              Gen1 functions
 330  */
 331 static int rsnd_src_set_route_gen1(struct rsnd_mod *mod)
 332 {
 333         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 334         struct src_route_config {
 335                 u32 mask;
 336                 int shift;
 337         } routes[] = {
 338                 { 0xF,  0, }, /* 0 */
 339                 { 0xF,  4, }, /* 1 */
 340                 { 0xF,  8, }, /* 2 */
 341                 { 0x7, 12, }, /* 3 */
 342                 { 0x7, 16, }, /* 4 */
 343                 { 0x7, 20, }, /* 5 */
 344                 { 0x7, 24, }, /* 6 */
 345                 { 0x3, 28, }, /* 7 */
 346                 { 0x3, 30, }, /* 8 */
 347         };
 348         u32 mask;
 349         u32 val;
 350         int id;
 351
 352         id = rsnd_mod_id(mod);
 353         if (id < 0 || id >= ARRAY_SIZE(routes))
 354                 return -EIO;
 355
 356         /*
 357          * SRC_ROUTE_SELECT
 358          */
 359         val = rsnd_io_is_play(io) ? 0x1 : 0x2;
 360         val = val               << routes[id].shift;
 361         mask = routes[id].mask  << routes[id].shift;
 362
 363         rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
 364
 365         return 0;
 366 }
 367
 368 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod *mod)
 369 {
 370         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 371         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 372         struct rsnd_src *src = rsnd_mod_to_src(mod);
 373         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 374         u32 convert_rate = rsnd_src_convert_rate(src);
 375         u32 mask;
 376         u32 val;
 377         int shift;
 378         int id = rsnd_mod_id(mod);
 379         int ret;
 380
 381         /*
 382          * SRC_TIMING_SELECT
 383          */
 384         shift   = (id % 4) * 8;
 385         mask    = 0x1F << shift;
 386
 387         /*
 388          * ADG is used as source clock if SRC was used,
 389          * then, SSI WS is used as destination clock.
 390          * SSI WS is used as source clock if SRC is not used
 391          * (when playback, source/destination become reverse when capture)
 392          */
 393         ret = 0;
 394         if (convert_rate) {
 395                 /* use ADG */
 396                 val = 0;
 397                 ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
 398                                                     runtime->rate,
 399                                                     convert_rate);
 400         } else if (8 == id) {
 401                 /* use SSI WS, but SRU8 is special */
 402                 val = id << shift;
 403         } else {
 404                 /* use SSI WS */
 405                 val = (id + 1) << shift;
 406         }
 407
 408         if (ret < 0)
 409                 return ret;
 410
 411         switch (id / 4) {
 412         case 0:
 413                 rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
 414                 break;
 415         case 1:
 416                 rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
 417                 break;
 418         case 2:
 419                 rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
 420                 break;
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod)
 427 {
 428         struct rsnd_src *src = rsnd_mod_to_src(mod);
 429         int ret;
 430
 431         ret = rsnd_src_set_convert_rate(mod);
 432         if (ret < 0)
 433                 return ret;
 434
 435         /* Select SRC mode (fixed value) */
 436         rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
 437
 438         /* Set the restriction value of the FS ratio (98%) */
 439         rsnd_mod_write(mod, SRC_MNFSR,
 440                        rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
 441
 442         /* Gen1/Gen2 are not compatible */
 443         if (rsnd_src_convert_rate(src))
 444                 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
 445
 446         /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
 447
 448         return 0;
 449 }
 450
 451 static int rsnd_src_probe_gen1(struct rsnd_mod *mod,
 452                                struct rsnd_priv *priv)
 453 {
 454         struct device *dev = rsnd_priv_to_dev(priv);
 455
 456         dev_dbg(dev, "%s[%d] (Gen1) is probed\n",
 457                 rsnd_mod_name(mod), rsnd_mod_id(mod));
 458
 459         return 0;
 460 }
 461
 462 static int rsnd_src_init_gen1(struct rsnd_mod *mod,
 463                               struct rsnd_priv *priv)
 464 {
 465         int ret;
 466
 467         ret = rsnd_src_init(mod);
 468         if (ret < 0)
 469                 return ret;
 470
 471         ret = rsnd_src_set_route_gen1(mod);
 472         if (ret < 0)
 473                 return ret;
 474
 475         ret = rsnd_src_set_convert_rate_gen1(mod);
 476         if (ret < 0)
 477                 return ret;
 478
 479         ret = rsnd_src_set_convert_timing_gen1(mod);
 480         if (ret < 0)
 481                 return ret;
 482
 483         return 0;
 484 }
 485
 486 static int rsnd_src_start_gen1(struct rsnd_mod *mod,
 487                                struct rsnd_priv *priv)
 488 {
 489         int id = rsnd_mod_id(mod);
 490
 491         rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
 492
 493         return rsnd_src_start(mod);
 494 }
 495
 496 static int rsnd_src_stop_gen1(struct rsnd_mod *mod,
 497                               struct rsnd_priv *priv)
 498 {
 499         int id = rsnd_mod_id(mod);
 500
 501         rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
 502
 503         return rsnd_src_stop(mod);
 504 }
 505
 506 static struct rsnd_mod_ops rsnd_src_gen1_ops = {
 507         .name   = SRC_NAME,
 508         .probe  = rsnd_src_probe_gen1,
 509         .init   = rsnd_src_init_gen1,
 510         .quit   = rsnd_src_quit,
 511         .start  = rsnd_src_start_gen1,
 512         .stop   = rsnd_src_stop_gen1,
 513 };
 514
 515 /*
 516  *              Gen2 functions
 517  */
 518 #define rsnd_src_irq_enable_gen2(mod)  rsnd_src_irq_ctrol_gen2(mod, 1)
 519 #define rsnd_src_irq_disable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 0)
 520 static void rsnd_src_irq_ctrol_gen2(struct rsnd_mod *mod, int enable)
 521 {
 522         struct rsnd_src *src = rsnd_mod_to_src(mod);
 523         u32 sys_int_val, int_val, sys_int_mask;
 524         int irq = src->info->irq;
 525         int id = rsnd_mod_id(mod);
 526
 527         sys_int_val =
 528         sys_int_mask = OUF_SRC(id);
 529         int_val = 0x3300;
 530
 531         /*
 532          * IRQ is not supported on non-DT
 533          * see
 534          *      rsnd_src_probe_gen2()
 535          */
 536         if ((irq <= 0) || !enable) {
 537                 sys_int_val = 0;
 538                 int_val = 0;
 539         }
 540
 541         rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
 542         rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
 543         rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
 544 }
 545
 546 static void rsnd_src_error_clear_gen2(struct rsnd_mod *mod)
 547 {
 548         u32 val = OUF_SRC(rsnd_mod_id(mod));
 549
 550         rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val);
 551         rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val);
 552 }
 553
 554 static bool rsnd_src_error_record_gen2(struct rsnd_mod *mod)
 555 {
 556         u32 val = OUF_SRC(rsnd_mod_id(mod));
 557         bool ret = false;
 558
 559         if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val) ||
 560             (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val)) {
 561                 struct rsnd_src *src = rsnd_mod_to_src(mod);
 562
 563                 src->err++;
 564                 ret = true;
 565         }
 566
 567         /* clear error static */
 568         rsnd_src_error_clear_gen2(mod);
 569
 570         return ret;
 571 }
 572
 573 static int _rsnd_src_start_gen2(struct rsnd_mod *mod)
 574 {
 575         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 576         u32 val = rsnd_io_to_mod_dvc(io) ? 0x01 : 0x11;
 577
 578         rsnd_mod_write(mod, SRC_CTRL, val);
 579
 580         rsnd_src_error_clear_gen2(mod);
 581
 582         rsnd_src_start(mod);
 583
 584         rsnd_src_irq_enable_gen2(mod);
 585
 586         return 0;
 587 }
 588
 589 static int _rsnd_src_stop_gen2(struct rsnd_mod *mod)
 590 {
 591         rsnd_src_irq_disable_gen2(mod);
 592
 593         rsnd_mod_write(mod, SRC_CTRL, 0);
 594
 595         rsnd_src_error_record_gen2(mod);
 596
 597         return rsnd_src_stop(mod);
 598 }
 599
 600 static irqreturn_t rsnd_src_interrupt_gen2(int irq, void *data)
 601 {
 602         struct rsnd_mod *mod = data;
 603         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 604
 605         if (!io)
 606                 return IRQ_NONE;
 607
 608         if (rsnd_src_error_record_gen2(mod)) {
 609                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 610                 struct device *dev = rsnd_priv_to_dev(priv);
 611
 612                 _rsnd_src_stop_gen2(mod);
 613                 _rsnd_src_start_gen2(mod);
 614
 615                 dev_dbg(dev, "%s[%d] restart\n",
 616                         rsnd_mod_name(mod), rsnd_mod_id(mod));
 617         }
 618
 619         return IRQ_HANDLED;
 620 }
 621
 622 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod)
 623 {
 624         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 625         struct device *dev = rsnd_priv_to_dev(priv);
 626         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 627         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 628         struct rsnd_src *src = rsnd_mod_to_src(mod);
 629         u32 convert_rate = rsnd_src_convert_rate(src);
 630         uint ratio;
 631         int ret;
 632
 633         /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
 634         if (!convert_rate)
 635                 ratio = 0;
 636         else if (convert_rate > runtime->rate)
 637                 ratio = 100 * convert_rate / runtime->rate;
 638         else
 639                 ratio = 100 * runtime->rate / convert_rate;
 640
 641         if (ratio > 600) {
 642                 dev_err(dev, "FSO/FSI ratio error\n");
 643                 return -EINVAL;
 644         }
 645
 646         ret = rsnd_src_set_convert_rate(mod);
 647         if (ret < 0)
 648                 return ret;
 649
 650         rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
 651
 652         if (convert_rate) {
 653                 /* Gen1/Gen2 are not compatible */
 654                 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
 655         }
 656
 657         switch (rsnd_mod_id(mod)) {
 658         case 5:
 659         case 6:
 660         case 7:
 661         case 8:
 662                 rsnd_mod_write(mod, SRC_BSDSR, 0x02400000);
 663                 break;
 664         default:
 665                 rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
 666                 break;
 667         }
 668
 669         rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
 670
 671         return 0;
 672 }
 673
 674 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod *mod)
 675 {
 676         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 677         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 678         struct rsnd_src *src = rsnd_mod_to_src(mod);
 679         u32 convert_rate = rsnd_src_convert_rate(src);
 680         int ret;
 681
 682         if (convert_rate)
 683                 ret = rsnd_adg_set_convert_clk_gen2(mod, io,
 684                                                     runtime->rate,
 685                                                     convert_rate);
 686         else
 687                 ret = rsnd_adg_set_convert_timing_gen2(mod, io);
 688
 689         return ret;
 690 }
 691
 692 static int rsnd_src_probe_gen2(struct rsnd_mod *mod,
 693                                struct rsnd_priv *priv)
 694 {
 695         struct rsnd_src *src = rsnd_mod_to_src(mod);
 696         struct device *dev = rsnd_priv_to_dev(priv);
 697         int irq = src->info->irq;
 698         int ret;
 699
 700         if (irq > 0) {
 701                 /*
 702                  * IRQ is not supported on non-DT
 703                  * see
 704                  *      rsnd_src_irq_enable_gen2()
 705                  */
 706                 ret = devm_request_irq(dev, irq,
 707                                        rsnd_src_interrupt_gen2,
 708                                        IRQF_SHARED,
 709                                        dev_name(dev), mod);
 710                 if (ret)
 711                         goto rsnd_src_probe_gen2_fail;
 712         }
 713
 714         ret = rsnd_dma_init(priv,
 715                             rsnd_mod_to_dma(mod),
 716                             rsnd_info_is_playback(priv, src),
 717                             src->info->dma_id);
 718         if (ret)
 719                 goto rsnd_src_probe_gen2_fail;
 720
 721         dev_dbg(dev, "%s[%d] (Gen2) is probed\n",
 722                 rsnd_mod_name(mod), rsnd_mod_id(mod));
 723
 724         return ret;
 725
 726 rsnd_src_probe_gen2_fail:
 727         dev_err(dev, "%s[%d] (Gen2) failed\n",
 728                 rsnd_mod_name(mod), rsnd_mod_id(mod));
 729
 730         return ret;
 731 }
 732
 733 static int rsnd_src_remove_gen2(struct rsnd_mod *mod,
 734                                 struct rsnd_priv *priv)
 735 {
 736         rsnd_dma_quit(priv, rsnd_mod_to_dma(mod));
 737
 738         return 0;
 739 }
 740
 741 static int rsnd_src_init_gen2(struct rsnd_mod *mod,
 742                               struct rsnd_priv *priv)
 743 {
 744         int ret;
 745
 746         ret = rsnd_src_init(mod);
 747         if (ret < 0)
 748                 return ret;
 749
 750         ret = rsnd_src_set_convert_rate_gen2(mod);
 751         if (ret < 0)
 752                 return ret;
 753
 754         ret = rsnd_src_set_convert_timing_gen2(mod);
 755         if (ret < 0)
 756                 return ret;
 757
 758         return 0;
 759 }
 760
 761 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
 762                                struct rsnd_priv *priv)
 763 {
 764         rsnd_dma_start(rsnd_mod_to_dma(mod));
 765
 766         return _rsnd_src_start_gen2(mod);
 767 }
 768
 769 static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
 770                               struct rsnd_priv *priv)
 771 {
 772         int ret;
 773
 774         ret = _rsnd_src_stop_gen2(mod);
 775
 776         rsnd_dma_stop(rsnd_mod_to_dma(mod));
 777
 778         return ret;
 779 }
 780
 781 static struct rsnd_mod_ops rsnd_src_gen2_ops = {
 782         .name   = SRC_NAME,
 783         .probe  = rsnd_src_probe_gen2,
 784         .remove = rsnd_src_remove_gen2,
 785         .init   = rsnd_src_init_gen2,
 786         .quit   = rsnd_src_quit,
 787         .start  = rsnd_src_start_gen2,
 788         .stop   = rsnd_src_stop_gen2,
 789 };
 790
 791 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
 792 {
 793         if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
 794                 id = 0;
 795
 796         return &((struct rsnd_src *)(priv->src) + id)->mod;
 797 }
 798
 799 static void rsnd_of_parse_src(struct platform_device *pdev,
 800                               const struct rsnd_of_data *of_data,
 801                               struct rsnd_priv *priv)
 802 {
 803         struct device_node *src_node;
 804         struct device_node *np;
 805         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 806         struct rsnd_src_platform_info *src_info;
 807         struct device *dev = &pdev->dev;
 808         int nr, i;
 809
 810         if (!of_data)
 811                 return;
 812
 813         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 814         if (!src_node)
 815                 return;
 816
 817         nr = of_get_child_count(src_node);
 818         if (!nr)
 819                 goto rsnd_of_parse_src_end;
 820
 821         src_info = devm_kzalloc(dev,
 822                                 sizeof(struct rsnd_src_platform_info) * nr,
 823                                 GFP_KERNEL);
 824         if (!src_info) {
 825                 dev_err(dev, "src info allocation error\n");
 826                 goto rsnd_of_parse_src_end;
 827         }
 828
 829         info->src_info          = src_info;
 830         info->src_info_nr       = nr;
 831
 832         i = 0;
 833         for_each_child_of_node(src_node, np) {
 834                 src_info[i].irq = irq_of_parse_and_map(np, 0);
 835
 836                 i++;
 837         }
 838
 839 rsnd_of_parse_src_end:
 840         of_node_put(src_node);
 841 }
 842
 843 int rsnd_src_probe(struct platform_device *pdev,
 844                    const struct rsnd_of_data *of_data,
 845                    struct rsnd_priv *priv)
 846 {
 847         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 848         struct device *dev = rsnd_priv_to_dev(priv);
 849         struct rsnd_src *src;
 850         struct rsnd_mod_ops *ops;
 851         struct clk *clk;
 852         char name[RSND_SRC_NAME_SIZE];
 853         int i, nr;
 854
 855         ops = NULL;
 856         if (rsnd_is_gen1(priv))
 857                 ops = &rsnd_src_gen1_ops;
 858         if (rsnd_is_gen2(priv))
 859                 ops = &rsnd_src_gen2_ops;
 860         if (!ops) {
 861                 dev_err(dev, "unknown Generation\n");
 862                 return -EIO;
 863         }
 864
 865         rsnd_of_parse_src(pdev, of_data, priv);
 866
 867         /*
 868          * init SRC
 869          */
 870         nr      = info->src_info_nr;
 871         if (!nr)
 872                 return 0;
 873
 874         src     = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
 875         if (!src) {
 876                 dev_err(dev, "SRC allocate failed\n");
 877                 return -ENOMEM;
 878         }
 879
 880         priv->src_nr    = nr;
 881         priv->src       = src;
 882
 883         for_each_rsnd_src(src, priv, i) {
 884                 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
 885                          SRC_NAME, i);
 886
 887                 clk = devm_clk_get(dev, name);
 888                 if (IS_ERR(clk))
 889                         return PTR_ERR(clk);
 890
 891                 src->info = &info->src_info[i];
 892
 893                 rsnd_mod_init(&src->mod, ops, clk, RSND_MOD_SRC, i);
 894
 895                 dev_dbg(dev, "SRC%d probed\n", i);
 896         }
 897
 898         return 0;
 899 }