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_mod mod; 24 struct rsnd_mod *dma; 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 int irq; 30 }; 31 32 #define RSND_SRC_NAME_SIZE 16 33 34 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id) 35 #define rsnd_src_to_dma(src) ((src)->dma) 36 #define rsnd_src_nr(priv) ((priv)->src_nr) 37 #define rsnd_enable_sync_convert(src) ((src)->sen.val) 38 39 #define rsnd_mod_to_src(_mod) \ 40 container_of((_mod), struct rsnd_src, mod) 41 42 #define for_each_rsnd_src(pos, priv, i) \ 43 for ((i) = 0; \ 44 ((i) < rsnd_src_nr(priv)) && \ 45 ((pos) = (struct rsnd_src *)(priv)->src + i); \ 46 i++) 47 48 49 /* 50 * image of SRC (Sampling Rate Converter) 51 * 52 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+ 53 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec | 54 * 44.1kHz <-> +-----+ +-----+ +-------+ 55 * ... 56 * 57 */ 58 59 /* 60 * src.c is caring... 61 * 62 * Gen1 63 * 64 * [mem] -> [SRU] -> [SSI] 65 * |--------| 66 * 67 * Gen2 68 * 69 * [mem] -> [SRC] -> [SSIU] -> [SSI] 70 * |-----------------| 71 */ 72 73 static void rsnd_src_activation(struct rsnd_mod *mod) 74 { 75 rsnd_mod_write(mod, SRC_SWRSR, 0); 76 rsnd_mod_write(mod, SRC_SWRSR, 1); 77 } 78 79 static void rsnd_src_halt(struct rsnd_mod *mod) 80 { 81 rsnd_mod_write(mod, SRC_SRCIR, 1); 82 rsnd_mod_write(mod, SRC_SWRSR, 0); 83 } 84 85 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io, 86 struct rsnd_mod *mod) 87 { 88 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 89 int is_play = rsnd_io_is_play(io); 90 91 return rsnd_dma_request_channel(rsnd_src_of_node(priv), 92 mod, 93 is_play ? "rx" : "tx"); 94 } 95 96 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, 97 struct rsnd_src *src) 98 { 99 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 100 u32 convert_rate; 101 102 if (!runtime) 103 return 0; 104 105 if (!rsnd_enable_sync_convert(src)) 106 return src->convert_rate; 107 108 convert_rate = src->sync.val; 109 110 if (!convert_rate) 111 convert_rate = src->convert_rate; 112 113 if (!convert_rate) 114 convert_rate = runtime->rate; 115 116 return convert_rate; 117 } 118 119 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv, 120 struct rsnd_dai_stream *io, 121 struct snd_pcm_runtime *runtime) 122 { 123 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); 124 struct rsnd_src *src; 125 unsigned int rate = 0; 126 127 if (src_mod) { 128 src = rsnd_mod_to_src(src_mod); 129 130 /* 131 * return convert rate if SRC is used, 132 * otherwise, return runtime->rate as usual 133 */ 134 rate = rsnd_src_convert_rate(io, src); 135 } 136 137 if (!rate) 138 rate = runtime->rate; 139 140 return rate; 141 } 142 143 static int rsnd_src_hw_params(struct rsnd_mod *mod, 144 struct rsnd_dai_stream *io, 145 struct snd_pcm_substream *substream, 146 struct snd_pcm_hw_params *fe_params) 147 { 148 struct rsnd_src *src = rsnd_mod_to_src(mod); 149 struct snd_soc_pcm_runtime *fe = substream->private_data; 150 151 /* 152 * SRC assumes that it is used under DPCM if user want to use 153 * sampling rate convert. Then, SRC should be FE. 154 * And then, this function will be called *after* BE settings. 155 * this means, each BE already has fixuped hw_params. 156 * see 157 * dpcm_fe_dai_hw_params() 158 * dpcm_be_dai_hw_params() 159 */ 160 if (fe->dai_link->dynamic) { 161 int stream = substream->stream; 162 struct snd_soc_dpcm *dpcm; 163 struct snd_pcm_hw_params *be_params; 164 165 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 166 be_params = &dpcm->hw_params; 167 168 if (params_rate(fe_params) != params_rate(be_params)) 169 src->convert_rate = params_rate(be_params); 170 } 171 } 172 173 return 0; 174 } 175 176 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io, 177 struct rsnd_mod *mod) 178 { 179 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 180 struct device *dev = rsnd_priv_to_dev(priv); 181 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 182 struct rsnd_src *src = rsnd_mod_to_src(mod); 183 u32 convert_rate = rsnd_src_convert_rate(io, src); 184 u32 ifscr, fsrate, adinr; 185 u32 cr, route; 186 u32 bsdsr, bsisr; 187 uint ratio; 188 189 if (!runtime) 190 return; 191 192 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ 193 if (!convert_rate) 194 ratio = 0; 195 else if (convert_rate > runtime->rate) 196 ratio = 100 * convert_rate / runtime->rate; 197 else 198 ratio = 100 * runtime->rate / convert_rate; 199 200 if (ratio > 600) { 201 dev_err(dev, "FSO/FSI ratio error\n"); 202 return; 203 } 204 205 /* 206 * SRC_ADINR 207 */ 208 adinr = rsnd_get_adinr_bit(mod, io) | 209 rsnd_get_adinr_chan(mod, io); 210 211 /* 212 * SRC_IFSCR / SRC_IFSVR 213 */ 214 ifscr = 0; 215 fsrate = 0; 216 if (convert_rate) { 217 ifscr = 1; 218 fsrate = 0x0400000 / convert_rate * runtime->rate; 219 } 220 221 /* 222 * SRC_SRCCR / SRC_ROUTE_MODE0 223 */ 224 cr = 0x00011110; 225 route = 0x0; 226 if (convert_rate) { 227 route = 0x1; 228 229 if (rsnd_enable_sync_convert(src)) { 230 cr |= 0x1; 231 route |= rsnd_io_is_play(io) ? 232 (0x1 << 24) : (0x1 << 25); 233 } 234 } 235 236 /* 237 * SRC_BSDSR / SRC_BSISR 238 */ 239 switch (rsnd_mod_id(mod)) { 240 case 5: 241 case 6: 242 case 7: 243 case 8: 244 bsdsr = 0x02400000; /* 6 - 1/6 */ 245 bsisr = 0x00100060; /* 6 - 1/6 */ 246 break; 247 default: 248 bsdsr = 0x01800000; /* 6 - 1/6 */ 249 bsisr = 0x00100060 ;/* 6 - 1/6 */ 250 break; 251 } 252 253 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */ 254 rsnd_mod_write(mod, SRC_ADINR, adinr); 255 rsnd_mod_write(mod, SRC_IFSCR, ifscr); 256 rsnd_mod_write(mod, SRC_IFSVR, fsrate); 257 rsnd_mod_write(mod, SRC_SRCCR, cr); 258 rsnd_mod_write(mod, SRC_BSDSR, bsdsr); 259 rsnd_mod_write(mod, SRC_BSISR, bsisr); 260 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ 261 262 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); 263 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, 1); 264 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, 1); 265 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); 266 267 if (convert_rate) 268 rsnd_adg_set_convert_clk_gen2(mod, io, 269 runtime->rate, 270 convert_rate); 271 else 272 rsnd_adg_set_convert_timing_gen2(mod, io); 273 } 274 275 #define rsnd_src_irq_enable(mod) rsnd_src_irq_ctrol(mod, 1) 276 #define rsnd_src_irq_disable(mod) rsnd_src_irq_ctrol(mod, 0) 277 static void rsnd_src_irq_ctrol(struct rsnd_mod *mod, int enable) 278 { 279 struct rsnd_src *src = rsnd_mod_to_src(mod); 280 u32 sys_int_val, int_val, sys_int_mask; 281 int irq = src->irq; 282 int id = rsnd_mod_id(mod); 283 284 sys_int_val = 285 sys_int_mask = OUF_SRC(id); 286 int_val = 0x3300; 287 288 /* 289 * IRQ is not supported on non-DT 290 * see 291 * rsnd_src_probe_() 292 */ 293 if ((irq <= 0) || !enable) { 294 sys_int_val = 0; 295 int_val = 0; 296 } 297 298 /* 299 * WORKAROUND 300 * 301 * ignore over flow error when rsnd_enable_sync_convert() 302 */ 303 if (rsnd_enable_sync_convert(src)) 304 sys_int_val = sys_int_val & 0xffff; 305 306 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val); 307 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val); 308 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val); 309 } 310 311 static void rsnd_src_status_clear(struct rsnd_mod *mod) 312 { 313 u32 val = OUF_SRC(rsnd_mod_id(mod)); 314 315 rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val); 316 rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val); 317 } 318 319 static bool rsnd_src_record_error(struct rsnd_mod *mod) 320 { 321 struct rsnd_src *src = rsnd_mod_to_src(mod); 322 u32 val0, val1; 323 bool ret = false; 324 325 val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); 326 327 /* 328 * WORKAROUND 329 * 330 * ignore over flow error when rsnd_enable_sync_convert() 331 */ 332 if (rsnd_enable_sync_convert(src)) 333 val0 = val0 & 0xffff; 334 335 if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) || 336 (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1)) { 337 struct rsnd_src *src = rsnd_mod_to_src(mod); 338 339 src->err++; 340 ret = true; 341 } 342 343 return ret; 344 } 345 346 static int rsnd_src_start(struct rsnd_mod *mod, 347 struct rsnd_dai_stream *io, 348 struct rsnd_priv *priv) 349 { 350 struct rsnd_src *src = rsnd_mod_to_src(mod); 351 u32 val; 352 353 /* 354 * WORKAROUND 355 * 356 * Enable SRC output if you want to use sync convert together with DVC 357 */ 358 val = (rsnd_io_to_mod_dvc(io) && !rsnd_enable_sync_convert(src)) ? 359 0x01 : 0x11; 360 361 rsnd_mod_write(mod, SRC_CTRL, val); 362 363 return 0; 364 } 365 366 static int rsnd_src_stop(struct rsnd_mod *mod, 367 struct rsnd_dai_stream *io, 368 struct rsnd_priv *priv) 369 { 370 /* 371 * stop SRC output only 372 * see rsnd_src_quit 373 */ 374 rsnd_mod_write(mod, SRC_CTRL, 0x01); 375 376 return 0; 377 } 378 379 static int rsnd_src_init(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); 384 385 rsnd_mod_power_on(mod); 386 387 rsnd_src_activation(mod); 388 389 rsnd_src_set_convert_rate(io, mod); 390 391 rsnd_src_status_clear(mod); 392 393 rsnd_src_irq_enable(mod); 394 395 src->err = 0; 396 397 /* reset sync convert_rate */ 398 src->sync.val = 0; 399 400 return 0; 401 } 402 403 static int rsnd_src_quit(struct rsnd_mod *mod, 404 struct rsnd_dai_stream *io, 405 struct rsnd_priv *priv) 406 { 407 struct rsnd_src *src = rsnd_mod_to_src(mod); 408 struct device *dev = rsnd_priv_to_dev(priv); 409 410 rsnd_src_irq_disable(mod); 411 412 /* stop both out/in */ 413 rsnd_mod_write(mod, SRC_CTRL, 0); 414 415 rsnd_src_halt(mod); 416 417 rsnd_mod_power_off(mod); 418 419 if (src->err) 420 dev_warn(dev, "%s[%d] under/over flow err = %d\n", 421 rsnd_mod_name(mod), rsnd_mod_id(mod), src->err); 422 423 src->convert_rate = 0; 424 425 /* reset sync convert_rate */ 426 src->sync.val = 0; 427 428 return 0; 429 } 430 431 static void __rsnd_src_interrupt(struct rsnd_mod *mod, 432 struct rsnd_dai_stream *io) 433 { 434 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 435 struct rsnd_src *src = rsnd_mod_to_src(mod); 436 struct device *dev = rsnd_priv_to_dev(priv); 437 438 spin_lock(&priv->lock); 439 440 /* ignore all cases if not working */ 441 if (!rsnd_io_is_working(io)) 442 goto rsnd_src_interrupt_out; 443 444 if (rsnd_src_record_error(mod)) { 445 446 dev_dbg(dev, "%s[%d] restart\n", 447 rsnd_mod_name(mod), rsnd_mod_id(mod)); 448 449 rsnd_src_stop(mod, io, priv); 450 rsnd_src_start(mod, io, priv); 451 } 452 453 if (src->err > 1024) { 454 rsnd_src_irq_disable(mod); 455 456 dev_warn(dev, "no more %s[%d] restart\n", 457 rsnd_mod_name(mod), rsnd_mod_id(mod)); 458 } 459 460 rsnd_src_status_clear(mod); 461 rsnd_src_interrupt_out: 462 463 spin_unlock(&priv->lock); 464 } 465 466 static irqreturn_t rsnd_src_interrupt(int irq, void *data) 467 { 468 struct rsnd_mod *mod = data; 469 470 rsnd_mod_interrupt(mod, __rsnd_src_interrupt); 471 472 return IRQ_HANDLED; 473 } 474 475 static int rsnd_src_probe_(struct rsnd_mod *mod, 476 struct rsnd_dai_stream *io, 477 struct rsnd_priv *priv) 478 { 479 struct rsnd_src *src = rsnd_mod_to_src(mod); 480 struct device *dev = rsnd_priv_to_dev(priv); 481 int irq = src->irq; 482 int ret; 483 484 if (irq > 0) { 485 /* 486 * IRQ is not supported on non-DT 487 * see 488 * rsnd_src_irq_enable() 489 */ 490 ret = devm_request_irq(dev, irq, 491 rsnd_src_interrupt, 492 IRQF_SHARED, 493 dev_name(dev), mod); 494 if (ret) 495 return ret; 496 } 497 498 src->dma = rsnd_dma_attach(io, mod, 0); 499 if (IS_ERR(src->dma)) 500 return PTR_ERR(src->dma); 501 502 return ret; 503 } 504 505 static int rsnd_src_pcm_new(struct rsnd_mod *mod, 506 struct rsnd_dai_stream *io, 507 struct snd_soc_pcm_runtime *rtd) 508 { 509 struct rsnd_dai *rdai = rsnd_io_to_rdai(io); 510 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 511 struct rsnd_src *src = rsnd_mod_to_src(mod); 512 int ret; 513 514 /* 515 * enable SRC sync convert if possible 516 */ 517 518 /* 519 * SRC sync convert needs clock master 520 */ 521 if (!rsnd_rdai_is_clk_master(rdai)) 522 return 0; 523 524 /* 525 * SRC In doesn't work if DVC was enabled 526 */ 527 if (dvc && !rsnd_io_is_play(io)) 528 return 0; 529 530 /* 531 * enable sync convert 532 */ 533 ret = rsnd_kctrl_new_s(mod, io, rtd, 534 rsnd_io_is_play(io) ? 535 "SRC Out Rate Switch" : 536 "SRC In Rate Switch", 537 rsnd_src_set_convert_rate, 538 &src->sen, 1); 539 if (ret < 0) 540 return ret; 541 542 ret = rsnd_kctrl_new_s(mod, io, rtd, 543 rsnd_io_is_play(io) ? 544 "SRC Out Rate" : 545 "SRC In Rate", 546 rsnd_src_set_convert_rate, 547 &src->sync, 192000); 548 549 return ret; 550 } 551 552 static struct rsnd_mod_ops rsnd_src_ops = { 553 .name = SRC_NAME, 554 .dma_req = rsnd_src_dma_req, 555 .probe = rsnd_src_probe_, 556 .init = rsnd_src_init, 557 .quit = rsnd_src_quit, 558 .start = rsnd_src_start, 559 .stop = rsnd_src_stop, 560 .hw_params = rsnd_src_hw_params, 561 .pcm_new = rsnd_src_pcm_new, 562 }; 563 564 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id) 565 { 566 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv))) 567 id = 0; 568 569 return rsnd_mod_get(rsnd_src_get(priv, id)); 570 } 571 572 int rsnd_src_probe(struct rsnd_priv *priv) 573 { 574 struct device_node *node; 575 struct device_node *np; 576 struct device *dev = rsnd_priv_to_dev(priv); 577 struct rsnd_src *src; 578 struct clk *clk; 579 char name[RSND_SRC_NAME_SIZE]; 580 int i, nr, ret; 581 582 /* This driver doesn't support Gen1 at this point */ 583 if (rsnd_is_gen1(priv)) 584 return 0; 585 586 node = rsnd_src_of_node(priv); 587 if (!node) 588 return 0; /* not used is not error */ 589 590 nr = of_get_child_count(node); 591 if (!nr) { 592 ret = -EINVAL; 593 goto rsnd_src_probe_done; 594 } 595 596 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL); 597 if (!src) { 598 ret = -ENOMEM; 599 goto rsnd_src_probe_done; 600 } 601 602 priv->src_nr = nr; 603 priv->src = src; 604 605 i = 0; 606 for_each_child_of_node(node, np) { 607 src = rsnd_src_get(priv, i); 608 609 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", 610 SRC_NAME, i); 611 612 src->irq = irq_of_parse_and_map(np, 0); 613 if (!src->irq) { 614 ret = -EINVAL; 615 goto rsnd_src_probe_done; 616 } 617 618 clk = devm_clk_get(dev, name); 619 if (IS_ERR(clk)) { 620 ret = PTR_ERR(clk); 621 goto rsnd_src_probe_done; 622 } 623 624 ret = rsnd_mod_init(priv, rsnd_mod_get(src), 625 &rsnd_src_ops, clk, RSND_MOD_SRC, i); 626 if (ret) 627 goto rsnd_src_probe_done; 628 629 i++; 630 } 631 632 ret = 0; 633 634 rsnd_src_probe_done: 635 of_node_put(node); 636 637 return ret; 638 } 639 640 void rsnd_src_remove(struct rsnd_priv *priv) 641 { 642 struct rsnd_src *src; 643 int i; 644 645 for_each_rsnd_src(src, priv, i) { 646 rsnd_mod_quit(rsnd_mod_get(src)); 647 } 648 } 649