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         struct rsnd_kctrl_cfg_s sen;  /* sync convert enable */
  26         struct rsnd_kctrl_cfg_s sync; /* sync convert */
  27         u32 convert_rate; /* sampling rate convert */
  28         int err;
  29 };
  30
  31 #define RSND_SRC_NAME_SIZE 16
  32
  33 #define rsnd_src_nr(priv) ((priv)->src_nr)
  34 #define rsnd_enable_sync_convert(src) ((src)->sen.val)
  35 #define rsnd_src_of_node(priv) \
  36         of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,src")
  37
  38 #define rsnd_mod_to_src(_mod)                           \
  39         container_of((_mod), struct rsnd_src, mod)
  40
  41 #define for_each_rsnd_src(pos, priv, i)                         \
  42         for ((i) = 0;                                           \
  43              ((i) < rsnd_src_nr(priv)) &&                       \
  44              ((pos) = (struct rsnd_src *)(priv)->src + i);      \
  45              i++)
  46
  47
  48 /*
  49  *              image of SRC (Sampling Rate Converter)
  50  *
  51  * 96kHz   <-> +-----+  48kHz   +-----+  48kHz  +-------+
  52  * 48kHz   <-> | SRC | <------> | SSI | <-----> | codec |
  53  * 44.1kHz <-> +-----+          +-----+         +-------+
  54  * ...
  55  *
  56  */
  57
  58 /*
  59  * src.c is caring...
  60  *
  61  * Gen1
  62  *
  63  * [mem] -> [SRU] -> [SSI]
  64  *        |--------|
  65  *
  66  * Gen2
  67  *
  68  * [mem] -> [SRC] -> [SSIU] -> [SSI]
  69  *        |-----------------|
  70  */
  71
  72 /*
  73  *      How to use SRC bypass mode for debugging
  74  *
  75  * SRC has bypass mode, and it is useful for debugging.
  76  * In Gen2 case,
  77  * SRCm_MODE controls whether SRC is used or not
  78  * SSI_MODE0 controls whether SSIU which receives SRC data
  79  * is used or not.
  80  * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
  81  * but SRC bypass mode needs SSI_MODE0 only.
  82  *
  83  * This driver request
  84  * struct rsnd_src_platform_info {
  85  *      u32 convert_rate;
  86  *      int dma_id;
  87  * }
  88  *
  89  * rsnd_src_convert_rate() indicates
  90  * above convert_rate, and it controls
  91  * whether SRC is used or not.
  92  *
  93  * ex) doesn't use SRC
  94  * static struct rsnd_dai_platform_info rsnd_dai = {
  95  *      .playback = { .ssi = &rsnd_ssi[0], },
  96  * };
  97  *
  98  * ex) uses SRC
  99  * static struct rsnd_src_platform_info rsnd_src[] = {
 100  *      RSND_SCU(48000, 0),
 101  *      ...
 102  * };
 103  * static struct rsnd_dai_platform_info rsnd_dai = {
 104  *      .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
 105  * };
 106  *
 107  * ex) uses SRC bypass mode
 108  * static struct rsnd_src_platform_info rsnd_src[] = {
 109  *      RSND_SCU(0, 0),
 110  *      ...
 111  * };
 112  * static struct rsnd_dai_platform_info rsnd_dai = {
 113  *      .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
 114  * };
 115  *
 116  */
 117
 118 /*
 119  *              Gen1/Gen2 common functions
 120  */
 121 static void rsnd_src_soft_reset(struct rsnd_mod *mod)
 122 {
 123         rsnd_mod_write(mod, SRC_SWRSR, 0);
 124         rsnd_mod_write(mod, SRC_SWRSR, 1);
 125 }
 126
 127 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io,
 128                                          struct rsnd_mod *mod)
 129 {
 130         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 131         int is_play = rsnd_io_is_play(io);
 132
 133         return rsnd_dma_request_channel(rsnd_src_of_node(priv),
 134                                         mod,
 135                                         is_play ? "rx" : "tx");
 136 }
 137
 138 int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
 139                         struct rsnd_dai_stream *io,
 140                         int use_busif)
 141 {
 142         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 143         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 144         int ssi_id = rsnd_mod_id(ssi_mod);
 145
 146         /*
 147          * SSI_MODE0
 148          */
 149         rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
 150                       !use_busif << ssi_id);
 151
 152         /*
 153          * SSI_MODE1
 154          */
 155         if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
 156                 int shift = -1;
 157                 switch (ssi_id) {
 158                 case 1:
 159                         shift = 0;
 160                         break;
 161                 case 2:
 162                         shift = 2;
 163                         break;
 164                 case 4:
 165                         shift = 16;
 166                         break;
 167                 }
 168
 169                 if (shift >= 0)
 170                         rsnd_mod_bset(ssi_mod, SSI_MODE1,
 171                                       0x3 << shift,
 172                                       rsnd_rdai_is_clk_master(rdai) ?
 173                                       0x2 << shift : 0x1 << shift);
 174         }
 175
 176         /*
 177          * DMA settings for SSIU
 178          */
 179         if (use_busif) {
 180                 u32 val = 0x76543210;
 181                 u32 mask = ~0;
 182
 183                 rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR,
 184                                rsnd_get_adinr(ssi_mod, io));
 185                 rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE,  1);
 186                 rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1);
 187
 188                 mask <<= runtime->channels * 4;
 189                 val = val & mask;
 190
 191                 switch (runtime->sample_bits) {
 192                 case 16:
 193                         val |= 0x67452301 & ~mask;
 194                         break;
 195                 case 32:
 196                         val |= 0x76543210 & ~mask;
 197                         break;
 198                 }
 199                 rsnd_mod_write(ssi_mod, SSI_BUSIF_DALIGN, val);
 200
 201         }
 202
 203         return 0;
 204 }
 205
 206 int rsnd_src_ssiu_stop(struct rsnd_mod *ssi_mod,
 207                        struct rsnd_dai_stream *io)
 208 {
 209         /*
 210          * DMA settings for SSIU
 211          */
 212         rsnd_mod_write(ssi_mod, SSI_CTRL, 0);
 213
 214         return 0;
 215 }
 216
 217 int rsnd_src_ssi_irq_enable(struct rsnd_mod *ssi_mod)
 218 {
 219         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 220
 221         if (rsnd_is_gen1(priv))
 222                 return 0;
 223
 224         /* enable SSI interrupt if Gen2 */
 225         rsnd_mod_write(ssi_mod, SSI_INT_ENABLE,
 226                        rsnd_ssi_is_dma_mode(ssi_mod) ?
 227                        0x0e000000 : 0x0f000000);
 228
 229         return 0;
 230 }
 231
 232 int rsnd_src_ssi_irq_disable(struct rsnd_mod *ssi_mod)
 233 {
 234         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 235
 236         if (rsnd_is_gen1(priv))
 237                 return 0;
 238
 239         /* disable SSI interrupt if Gen2 */
 240         rsnd_mod_write(ssi_mod, SSI_INT_ENABLE, 0x00000000);
 241
 242         return 0;
 243 }
 244
 245 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io,
 246                                  struct rsnd_src *src)
 247 {
 248         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 249         u32 convert_rate;
 250
 251         if (!runtime)
 252                 return 0;
 253
 254         if (!rsnd_enable_sync_convert(src))
 255                 return src->convert_rate;
 256
 257         convert_rate = src->sync.val;
 258
 259         if (!convert_rate)
 260                 convert_rate = src->convert_rate;
 261
 262         if (!convert_rate)
 263                 convert_rate = runtime->rate;
 264
 265         return convert_rate;
 266 }
 267
 268 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
 269                                    struct rsnd_dai_stream *io,
 270                                    struct snd_pcm_runtime *runtime)
 271 {
 272         struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
 273         struct rsnd_src *src;
 274         unsigned int rate = 0;
 275
 276         if (src_mod) {
 277                 src = rsnd_mod_to_src(src_mod);
 278
 279                 /*
 280                  * return convert rate if SRC is used,
 281                  * otherwise, return runtime->rate as usual
 282                  */
 283                 rate = rsnd_src_convert_rate(io, src);
 284         }
 285
 286         if (!rate)
 287                 rate = runtime->rate;
 288
 289         return rate;
 290 }
 291
 292 static int rsnd_src_set_convert_rate(struct rsnd_mod *mod,
 293                                      struct rsnd_dai_stream *io)
 294 {
 295         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 296         struct rsnd_src *src = rsnd_mod_to_src(mod);
 297         u32 convert_rate = rsnd_src_convert_rate(io, src);
 298         u32 fsrate = 0;
 299
 300         if (convert_rate)
 301                 fsrate = 0x0400000 / convert_rate * runtime->rate;
 302
 303         /* Set channel number and output bit length */
 304         rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod, io));
 305
 306         /* Enable the initial value of IFS */
 307         if (fsrate) {
 308                 rsnd_mod_write(mod, SRC_IFSCR, 1);
 309
 310                 /* Set initial value of IFS */
 311                 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
 312         }
 313
 314         /* use DMA transfer */
 315         rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
 316
 317         return 0;
 318 }
 319
 320 static int rsnd_src_hw_params(struct rsnd_mod *mod,
 321                               struct rsnd_dai_stream *io,
 322                               struct snd_pcm_substream *substream,
 323                               struct snd_pcm_hw_params *fe_params)
 324 {
 325         struct rsnd_src *src = rsnd_mod_to_src(mod);
 326         struct snd_soc_pcm_runtime *fe = substream->private_data;
 327
 328         /* default value (mainly for non-DT) */
 329         src->convert_rate = src->info->convert_rate;
 330
 331         /*
 332          * SRC assumes that it is used under DPCM if user want to use
 333          * sampling rate convert. Then, SRC should be FE.
 334          * And then, this function will be called *after* BE settings.
 335          * this means, each BE already has fixuped hw_params.
 336          * see
 337          *      dpcm_fe_dai_hw_params()
 338          *      dpcm_be_dai_hw_params()
 339          */
 340         if (fe->dai_link->dynamic) {
 341                 int stream = substream->stream;
 342                 struct snd_soc_dpcm *dpcm;
 343                 struct snd_pcm_hw_params *be_params;
 344
 345                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
 346                         be_params = &dpcm->hw_params;
 347
 348                         if (params_rate(fe_params) != params_rate(be_params))
 349                                 src->convert_rate = params_rate(be_params);
 350                 }
 351         }
 352
 353         return 0;
 354 }
 355
 356 static int rsnd_src_init(struct rsnd_mod *mod,
 357                          struct rsnd_priv *priv)
 358 {
 359         struct rsnd_src *src = rsnd_mod_to_src(mod);
 360
 361         rsnd_mod_hw_start(mod);
 362
 363         rsnd_src_soft_reset(mod);
 364
 365         src->err = 0;
 366
 367         /* reset sync convert_rate */
 368         src->sync.val = 0;
 369
 370         /*
 371          * Initialize the operation of the SRC internal circuits
 372          * see rsnd_src_start()
 373          */
 374         rsnd_mod_write(mod, SRC_SRCIR, 1);
 375
 376         return 0;
 377 }
 378
 379 static int rsnd_src_quit(struct rsnd_mod *mod,
 380                          struct rsnd_dai_stream *io,
 381                          struct rsnd_priv *priv)
 382 {
 383         struct rsnd_src *src = rsnd_mod_to_src(mod);
 384         struct device *dev = rsnd_priv_to_dev(priv);
 385
 386         rsnd_mod_hw_stop(mod);
 387
 388         if (src->err)
 389                 dev_warn(dev, "%s[%d] under/over flow err = %d\n",
 390                          rsnd_mod_name(mod), rsnd_mod_id(mod), src->err);
 391
 392         src->convert_rate = 0;
 393
 394         /* reset sync convert_rate */
 395         src->sync.val = 0;
 396
 397         return 0;
 398 }
 399
 400 static int rsnd_src_start(struct rsnd_mod *mod)
 401 {
 402         /*
 403          * Cancel the initialization and operate the SRC function
 404          * see rsnd_src_init()
 405          */
 406         rsnd_mod_write(mod, SRC_SRCIR, 0);
 407
 408         return 0;
 409 }
 410
 411 static int rsnd_src_stop(struct rsnd_mod *mod)
 412 {
 413         /* nothing to do */
 414         return 0;
 415 }
 416
 417 /*
 418  *              Gen1 functions
 419  */
 420 static int rsnd_src_set_route_gen1(struct rsnd_dai_stream *io,
 421                                    struct rsnd_mod *mod)
 422 {
 423         struct src_route_config {
 424                 u32 mask;
 425                 int shift;
 426         } routes[] = {
 427                 { 0xF,  0, }, /* 0 */
 428                 { 0xF,  4, }, /* 1 */
 429                 { 0xF,  8, }, /* 2 */
 430                 { 0x7, 12, }, /* 3 */
 431                 { 0x7, 16, }, /* 4 */
 432                 { 0x7, 20, }, /* 5 */
 433                 { 0x7, 24, }, /* 6 */
 434                 { 0x3, 28, }, /* 7 */
 435                 { 0x3, 30, }, /* 8 */
 436         };
 437         u32 mask;
 438         u32 val;
 439         int id;
 440
 441         id = rsnd_mod_id(mod);
 442         if (id < 0 || id >= ARRAY_SIZE(routes))
 443                 return -EIO;
 444
 445         /*
 446          * SRC_ROUTE_SELECT
 447          */
 448         val = rsnd_io_is_play(io) ? 0x1 : 0x2;
 449         val = val               << routes[id].shift;
 450         mask = routes[id].mask  << routes[id].shift;
 451
 452         rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
 453
 454         return 0;
 455 }
 456
 457 static int rsnd_src_set_convert_timing_gen1(struct rsnd_dai_stream *io,
 458                                             struct rsnd_mod *mod)
 459 {
 460         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 461         struct rsnd_src *src = rsnd_mod_to_src(mod);
 462         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 463         u32 convert_rate = rsnd_src_convert_rate(io, src);
 464         u32 mask;
 465         u32 val;
 466         int shift;
 467         int id = rsnd_mod_id(mod);
 468         int ret;
 469
 470         /*
 471          * SRC_TIMING_SELECT
 472          */
 473         shift   = (id % 4) * 8;
 474         mask    = 0x1F << shift;
 475
 476         /*
 477          * ADG is used as source clock if SRC was used,
 478          * then, SSI WS is used as destination clock.
 479          * SSI WS is used as source clock if SRC is not used
 480          * (when playback, source/destination become reverse when capture)
 481          */
 482         ret = 0;
 483         if (convert_rate) {
 484                 /* use ADG */
 485                 val = 0;
 486                 ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
 487                                                     runtime->rate,
 488                                                     convert_rate);
 489         } else if (8 == id) {
 490                 /* use SSI WS, but SRU8 is special */
 491                 val = id << shift;
 492         } else {
 493                 /* use SSI WS */
 494                 val = (id + 1) << shift;
 495         }
 496
 497         if (ret < 0)
 498                 return ret;
 499
 500         switch (id / 4) {
 501         case 0:
 502                 rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
 503                 break;
 504         case 1:
 505                 rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
 506                 break;
 507         case 2:
 508                 rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
 509                 break;
 510         }
 511
 512         return 0;
 513 }
 514
 515 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod,
 516                                           struct rsnd_dai_stream *io)
 517 {
 518         struct rsnd_src *src = rsnd_mod_to_src(mod);
 519         int ret;
 520
 521         ret = rsnd_src_set_convert_rate(mod, io);
 522         if (ret < 0)
 523                 return ret;
 524
 525         /* Select SRC mode (fixed value) */
 526         rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
 527
 528         /* Set the restriction value of the FS ratio (98%) */
 529         rsnd_mod_write(mod, SRC_MNFSR,
 530                        rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
 531
 532         /* Gen1/Gen2 are not compatible */
 533         if (rsnd_src_convert_rate(io, src))
 534                 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
 535
 536         /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
 537
 538         return 0;
 539 }
 540
 541 static int rsnd_src_init_gen1(struct rsnd_mod *mod,
 542                               struct rsnd_dai_stream *io,
 543                               struct rsnd_priv *priv)
 544 {
 545         int ret;
 546
 547         ret = rsnd_src_init(mod, priv);
 548         if (ret < 0)
 549                 return ret;
 550
 551         ret = rsnd_src_set_route_gen1(io, mod);
 552         if (ret < 0)
 553                 return ret;
 554
 555         ret = rsnd_src_set_convert_rate_gen1(mod, io);
 556         if (ret < 0)
 557                 return ret;
 558
 559         ret = rsnd_src_set_convert_timing_gen1(io, mod);
 560         if (ret < 0)
 561                 return ret;
 562
 563         return 0;
 564 }
 565
 566 static int rsnd_src_start_gen1(struct rsnd_mod *mod,
 567                                struct rsnd_dai_stream *io,
 568                                struct rsnd_priv *priv)
 569 {
 570         int id = rsnd_mod_id(mod);
 571
 572         rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
 573
 574         return rsnd_src_start(mod);
 575 }
 576
 577 static int rsnd_src_stop_gen1(struct rsnd_mod *mod,
 578                               struct rsnd_dai_stream *io,
 579                               struct rsnd_priv *priv)
 580 {
 581         int id = rsnd_mod_id(mod);
 582
 583         rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
 584
 585         return rsnd_src_stop(mod);
 586 }
 587
 588 static struct rsnd_mod_ops rsnd_src_gen1_ops = {
 589         .name   = SRC_NAME,
 590         .dma_req = rsnd_src_dma_req,
 591         .init   = rsnd_src_init_gen1,
 592         .quit   = rsnd_src_quit,
 593         .start  = rsnd_src_start_gen1,
 594         .stop   = rsnd_src_stop_gen1,
 595         .hw_params = rsnd_src_hw_params,
 596 };
 597
 598 /*
 599  *              Gen2 functions
 600  */
 601 #define rsnd_src_irq_enable_gen2(mod)  rsnd_src_irq_ctrol_gen2(mod, 1)
 602 #define rsnd_src_irq_disable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 0)
 603 static void rsnd_src_irq_ctrol_gen2(struct rsnd_mod *mod, int enable)
 604 {
 605         struct rsnd_src *src = rsnd_mod_to_src(mod);
 606         u32 sys_int_val, int_val, sys_int_mask;
 607         int irq = src->info->irq;
 608         int id = rsnd_mod_id(mod);
 609
 610         sys_int_val =
 611         sys_int_mask = OUF_SRC(id);
 612         int_val = 0x3300;
 613
 614         /*
 615          * IRQ is not supported on non-DT
 616          * see
 617          *      rsnd_src_probe_gen2()
 618          */
 619         if ((irq <= 0) || !enable) {
 620                 sys_int_val = 0;
 621                 int_val = 0;
 622         }
 623
 624         /*
 625          * WORKAROUND
 626          *
 627          * ignore over flow error when rsnd_enable_sync_convert()
 628          */
 629         if (rsnd_enable_sync_convert(src))
 630                 sys_int_val = sys_int_val & 0xffff;
 631
 632         rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
 633         rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
 634         rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
 635 }
 636
 637 static void rsnd_src_error_clear_gen2(struct rsnd_mod *mod)
 638 {
 639         u32 val = OUF_SRC(rsnd_mod_id(mod));
 640
 641         rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val);
 642         rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val);
 643 }
 644
 645 static bool rsnd_src_error_record_gen2(struct rsnd_mod *mod)
 646 {
 647         struct rsnd_src *src = rsnd_mod_to_src(mod);
 648         u32 val0, val1;
 649         bool ret = false;
 650
 651         val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
 652
 653         /*
 654          * WORKAROUND
 655          *
 656          * ignore over flow error when rsnd_enable_sync_convert()
 657          */
 658         if (rsnd_enable_sync_convert(src))
 659                 val0 = val0 & 0xffff;
 660
 661         if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) ||
 662             (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1)) {
 663                 struct rsnd_src *src = rsnd_mod_to_src(mod);
 664
 665                 src->err++;
 666                 ret = true;
 667         }
 668
 669         /* clear error static */
 670         rsnd_src_error_clear_gen2(mod);
 671
 672         return ret;
 673 }
 674
 675 static int _rsnd_src_start_gen2(struct rsnd_mod *mod,
 676                                 struct rsnd_dai_stream *io)
 677 {
 678         struct rsnd_src *src = rsnd_mod_to_src(mod);
 679         u32 val;
 680
 681         /*
 682          * WORKAROUND
 683          *
 684          * Enable SRC output if you want to use sync convert together with DVC
 685          */
 686         val = (rsnd_io_to_mod_dvc(io) && !rsnd_enable_sync_convert(src)) ?
 687                 0x01 : 0x11;
 688
 689         rsnd_mod_write(mod, SRC_CTRL, val);
 690
 691         rsnd_src_error_clear_gen2(mod);
 692
 693         rsnd_src_start(mod);
 694
 695         rsnd_src_irq_enable_gen2(mod);
 696
 697         return 0;
 698 }
 699
 700 static int _rsnd_src_stop_gen2(struct rsnd_mod *mod)
 701 {
 702         rsnd_src_irq_disable_gen2(mod);
 703
 704         rsnd_mod_write(mod, SRC_CTRL, 0);
 705
 706         rsnd_src_error_record_gen2(mod);
 707
 708         return rsnd_src_stop(mod);
 709 }
 710
 711 static void __rsnd_src_interrupt_gen2(struct rsnd_mod *mod,
 712                                       struct rsnd_dai_stream *io)
 713 {
 714         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 715
 716         spin_lock(&priv->lock);
 717
 718         /* ignore all cases if not working */
 719         if (!rsnd_io_is_working(io))
 720                 goto rsnd_src_interrupt_gen2_out;
 721
 722         if (rsnd_src_error_record_gen2(mod)) {
 723                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 724                 struct rsnd_src *src = rsnd_mod_to_src(mod);
 725                 struct device *dev = rsnd_priv_to_dev(priv);
 726
 727                 dev_dbg(dev, "%s[%d] restart\n",
 728                         rsnd_mod_name(mod), rsnd_mod_id(mod));
 729
 730                 _rsnd_src_stop_gen2(mod);
 731                 if (src->err < 1024)
 732                         _rsnd_src_start_gen2(mod, io);
 733                 else
 734                         dev_warn(dev, "no more SRC restart\n");
 735         }
 736
 737 rsnd_src_interrupt_gen2_out:
 738         spin_unlock(&priv->lock);
 739 }
 740
 741 static irqreturn_t rsnd_src_interrupt_gen2(int irq, void *data)
 742 {
 743         struct rsnd_mod *mod = data;
 744
 745         rsnd_mod_interrupt(mod, __rsnd_src_interrupt_gen2);
 746
 747         return IRQ_HANDLED;
 748 }
 749
 750 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
 751                                           struct rsnd_dai_stream *io)
 752 {
 753         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 754         struct device *dev = rsnd_priv_to_dev(priv);
 755         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 756         struct rsnd_src *src = rsnd_mod_to_src(mod);
 757         u32 convert_rate = rsnd_src_convert_rate(io, src);
 758         u32 cr, route;
 759         uint ratio;
 760         int ret;
 761
 762         /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
 763         if (!convert_rate)
 764                 ratio = 0;
 765         else if (convert_rate > runtime->rate)
 766                 ratio = 100 * convert_rate / runtime->rate;
 767         else
 768                 ratio = 100 * runtime->rate / convert_rate;
 769
 770         if (ratio > 600) {
 771                 dev_err(dev, "FSO/FSI ratio error\n");
 772                 return -EINVAL;
 773         }
 774
 775         ret = rsnd_src_set_convert_rate(mod, io);
 776         if (ret < 0)
 777                 return ret;
 778
 779         cr      = 0x00011110;
 780         route   = 0x0;
 781         if (convert_rate) {
 782                 route   = 0x1;
 783
 784                 if (rsnd_enable_sync_convert(src)) {
 785                         cr |= 0x1;
 786                         route |= rsnd_io_is_play(io) ?
 787                                 (0x1 << 24) : (0x1 << 25);
 788                 }
 789         }
 790
 791         rsnd_mod_write(mod, SRC_SRCCR, cr);
 792         rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
 793
 794         switch (rsnd_mod_id(mod)) {
 795         case 5:
 796         case 6:
 797         case 7:
 798         case 8:
 799                 rsnd_mod_write(mod, SRC_BSDSR, 0x02400000);
 800                 break;
 801         default:
 802                 rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
 803                 break;
 804         }
 805
 806         rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
 807
 808         return 0;
 809 }
 810
 811 static int rsnd_src_set_convert_timing_gen2(struct rsnd_dai_stream *io,
 812                                             struct rsnd_mod *mod)
 813 {
 814         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 815         struct rsnd_src *src = rsnd_mod_to_src(mod);
 816         u32 convert_rate = rsnd_src_convert_rate(io, src);
 817         int ret;
 818
 819         if (convert_rate)
 820                 ret = rsnd_adg_set_convert_clk_gen2(mod, io,
 821                                                     runtime->rate,
 822                                                     convert_rate);
 823         else
 824                 ret = rsnd_adg_set_convert_timing_gen2(mod, io);
 825
 826         return ret;
 827 }
 828
 829 static int rsnd_src_probe_gen2(struct rsnd_mod *mod,
 830                                struct rsnd_dai_stream *io,
 831                                struct rsnd_priv *priv)
 832 {
 833         struct rsnd_src *src = rsnd_mod_to_src(mod);
 834         struct device *dev = rsnd_priv_to_dev(priv);
 835         int irq = src->info->irq;
 836         int ret;
 837
 838         if (irq > 0) {
 839                 /*
 840                  * IRQ is not supported on non-DT
 841                  * see
 842                  *      rsnd_src_irq_enable_gen2()
 843                  */
 844                 ret = devm_request_irq(dev, irq,
 845                                        rsnd_src_interrupt_gen2,
 846                                        IRQF_SHARED,
 847                                        dev_name(dev), mod);
 848                 if (ret)
 849                         return ret;
 850         }
 851
 852         ret = rsnd_dma_init(io,
 853                             rsnd_mod_to_dma(mod),
 854                             src->info->dma_id);
 855
 856         return ret;
 857 }
 858
 859 static int rsnd_src_remove_gen2(struct rsnd_mod *mod,
 860                                 struct rsnd_dai_stream *io,
 861                                 struct rsnd_priv *priv)
 862 {
 863         rsnd_dma_quit(io, rsnd_mod_to_dma(mod));
 864
 865         return 0;
 866 }
 867
 868 static int rsnd_src_init_gen2(struct rsnd_mod *mod,
 869                               struct rsnd_dai_stream *io,
 870                               struct rsnd_priv *priv)
 871 {
 872         int ret;
 873
 874         ret = rsnd_src_init(mod, priv);
 875         if (ret < 0)
 876                 return ret;
 877
 878         ret = rsnd_src_set_convert_rate_gen2(mod, io);
 879         if (ret < 0)
 880                 return ret;
 881
 882         ret = rsnd_src_set_convert_timing_gen2(io, mod);
 883         if (ret < 0)
 884                 return ret;
 885
 886         return 0;
 887 }
 888
 889 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
 890                                struct rsnd_dai_stream *io,
 891                                struct rsnd_priv *priv)
 892 {
 893         rsnd_dma_start(io, rsnd_mod_to_dma(mod));
 894
 895         return _rsnd_src_start_gen2(mod, io);
 896 }
 897
 898 static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
 899                               struct rsnd_dai_stream *io,
 900                               struct rsnd_priv *priv)
 901 {
 902         int ret;
 903
 904         ret = _rsnd_src_stop_gen2(mod);
 905
 906         rsnd_dma_stop(io, rsnd_mod_to_dma(mod));
 907
 908         return ret;
 909 }
 910
 911 static void rsnd_src_reconvert_update(struct rsnd_dai_stream *io,
 912                                       struct rsnd_mod *mod)
 913 {
 914         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 915         struct rsnd_src *src = rsnd_mod_to_src(mod);
 916         u32 convert_rate = rsnd_src_convert_rate(io, src);
 917         u32 fsrate;
 918
 919         if (!runtime)
 920                 return;
 921
 922         if (!convert_rate)
 923                 convert_rate = runtime->rate;
 924
 925         fsrate = 0x0400000 / convert_rate * runtime->rate;
 926
 927         /* update IFS */
 928         rsnd_mod_write(mod, SRC_IFSVR, fsrate);
 929 }
 930
 931 static int rsnd_src_pcm_new(struct rsnd_mod *mod,
 932                             struct rsnd_dai_stream *io,
 933                             struct snd_soc_pcm_runtime *rtd)
 934 {
 935         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 936         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 937         struct rsnd_src *src = rsnd_mod_to_src(mod);
 938         int ret;
 939
 940         /*
 941          * enable SRC sync convert if possible
 942          */
 943
 944         /*
 945          * Gen1 is not supported
 946          */
 947         if (rsnd_is_gen1(priv))
 948                 return 0;
 949
 950         /*
 951          * SRC sync convert needs clock master
 952          */
 953         if (!rsnd_rdai_is_clk_master(rdai))
 954                 return 0;
 955
 956         /*
 957          * enable sync convert
 958          */
 959         ret = rsnd_kctrl_new_s(mod, io, rtd,
 960                                rsnd_io_is_play(io) ?
 961                                "SRC Out Rate Switch" :
 962                                "SRC In Rate Switch",
 963                                rsnd_src_reconvert_update,
 964                                &src->sen, 1);
 965         if (ret < 0)
 966                 return ret;
 967
 968         ret = rsnd_kctrl_new_s(mod, io, rtd,
 969                                rsnd_io_is_play(io) ?
 970                                "SRC Out Rate" :
 971                                "SRC In Rate",
 972                                rsnd_src_reconvert_update,
 973                                &src->sync, 192000);
 974
 975         return ret;
 976 }
 977
 978 static struct rsnd_mod_ops rsnd_src_gen2_ops = {
 979         .name   = SRC_NAME,
 980         .dma_req = rsnd_src_dma_req,
 981         .probe  = rsnd_src_probe_gen2,
 982         .remove = rsnd_src_remove_gen2,
 983         .init   = rsnd_src_init_gen2,
 984         .quit   = rsnd_src_quit,
 985         .start  = rsnd_src_start_gen2,
 986         .stop   = rsnd_src_stop_gen2,
 987         .hw_params = rsnd_src_hw_params,
 988         .pcm_new = rsnd_src_pcm_new,
 989 };
 990
 991 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
 992 {
 993         if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
 994                 id = 0;
 995
 996         return &((struct rsnd_src *)(priv->src) + id)->mod;
 997 }
 998
 999 static void rsnd_of_parse_src(struct platform_device *pdev,
1000                               const struct rsnd_of_data *of_data,
1001                               struct rsnd_priv *priv)
1002 {
1003         struct device_node *src_node;
1004         struct device_node *np;
1005         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
1006         struct rsnd_src_platform_info *src_info;
1007         struct device *dev = &pdev->dev;
1008         int nr, i;
1009
1010         if (!of_data)
1011                 return;
1012
1013         src_node = rsnd_src_of_node(priv);
1014         if (!src_node)
1015                 return;
1016
1017         nr = of_get_child_count(src_node);
1018         if (!nr)
1019                 goto rsnd_of_parse_src_end;
1020
1021         src_info = devm_kzalloc(dev,
1022                                 sizeof(struct rsnd_src_platform_info) * nr,
1023                                 GFP_KERNEL);
1024         if (!src_info) {
1025                 dev_err(dev, "src info allocation error\n");
1026                 goto rsnd_of_parse_src_end;
1027         }
1028
1029         info->src_info          = src_info;
1030         info->src_info_nr       = nr;
1031
1032         i = 0;
1033         for_each_child_of_node(src_node, np) {
1034                 src_info[i].irq = irq_of_parse_and_map(np, 0);
1035
1036                 i++;
1037         }
1038
1039 rsnd_of_parse_src_end:
1040         of_node_put(src_node);
1041 }
1042
1043 int rsnd_src_probe(struct platform_device *pdev,
1044                    const struct rsnd_of_data *of_data,
1045                    struct rsnd_priv *priv)
1046 {
1047         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
1048         struct device *dev = rsnd_priv_to_dev(priv);
1049         struct rsnd_src *src;
1050         struct rsnd_mod_ops *ops;
1051         struct clk *clk;
1052         char name[RSND_SRC_NAME_SIZE];
1053         int i, nr, ret;
1054
1055         ops = NULL;
1056         if (rsnd_is_gen1(priv))
1057                 ops = &rsnd_src_gen1_ops;
1058         if (rsnd_is_gen2(priv))
1059                 ops = &rsnd_src_gen2_ops;
1060         if (!ops) {
1061                 dev_err(dev, "unknown Generation\n");
1062                 return -EIO;
1063         }
1064
1065         rsnd_of_parse_src(pdev, of_data, priv);
1066
1067         /*
1068          * init SRC
1069          */
1070         nr      = info->src_info_nr;
1071         if (!nr)
1072                 return 0;
1073
1074         src     = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
1075         if (!src)
1076                 return -ENOMEM;
1077
1078         priv->src_nr    = nr;
1079         priv->src       = src;
1080
1081         for_each_rsnd_src(src, priv, i) {
1082                 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
1083                          SRC_NAME, i);
1084
1085                 clk = devm_clk_get(dev, name);
1086                 if (IS_ERR(clk))
1087                         return PTR_ERR(clk);
1088
1089                 src->info = &info->src_info[i];
1090
1091                 ret = rsnd_mod_init(priv, &src->mod, ops, clk, RSND_MOD_SRC, i);
1092                 if (ret)
1093                         return ret;
1094         }
1095
1096         return 0;
1097 }
1098
1099 void rsnd_src_remove(struct platform_device *pdev,
1100                      struct rsnd_priv *priv)
1101 {
1102         struct rsnd_src *src;
1103         int i;
1104
1105         for_each_rsnd_src(src, priv, i) {
1106                 rsnd_mod_quit(&src->mod);
1107         }
1108 }