1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Renesas R-Car SRC support 4 // 5 // Copyright (C) 2013 Renesas Solutions Corp. 6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 8 /* 9 * you can enable below define if you don't need 10 * SSI interrupt status debug message when debugging 11 * see rsnd_dbg_irq_status() 12 * 13 * #define RSND_DEBUG_NO_IRQ_STATUS 1 14 */ 15 16 #include "rsnd.h" 17 #include <linux/sys_soc.h> 18 19 #define SRC_NAME "src" 20 21 /* SCU_SYSTEM_STATUS0/1 */ 22 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id)) 23 24 struct rsnd_src { 25 struct rsnd_mod mod; 26 struct rsnd_mod *dma; 27 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */ 28 struct rsnd_kctrl_cfg_s sync; /* sync convert */ 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_nr(priv) ((priv)->src_nr) 36 #define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val) 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 static void rsnd_src_activation(struct rsnd_mod *mod) 59 { 60 rsnd_mod_write(mod, SRC_SWRSR, 0); 61 rsnd_mod_write(mod, SRC_SWRSR, 1); 62 } 63 64 static void rsnd_src_halt(struct rsnd_mod *mod) 65 { 66 rsnd_mod_write(mod, SRC_SRCIR, 1); 67 rsnd_mod_write(mod, SRC_SWRSR, 0); 68 } 69 70 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io, 71 struct rsnd_mod *mod) 72 { 73 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 74 int is_play = rsnd_io_is_play(io); 75 76 return rsnd_dma_request_channel(rsnd_src_of_node(priv), 77 mod, 78 is_play ? "rx" : "tx"); 79 } 80 81 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, 82 struct rsnd_mod *mod) 83 { 84 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 85 struct rsnd_src *src = rsnd_mod_to_src(mod); 86 u32 convert_rate; 87 88 if (!runtime) 89 return 0; 90 91 if (!rsnd_src_sync_is_enabled(mod)) 92 return rsnd_io_converted_rate(io); 93 94 convert_rate = src->sync.val; 95 96 if (!convert_rate) 97 convert_rate = rsnd_io_converted_rate(io); 98 99 if (!convert_rate) 100 convert_rate = runtime->rate; 101 102 return convert_rate; 103 } 104 105 unsigned int rsnd_src_get_rate(struct rsnd_priv *priv, 106 struct rsnd_dai_stream *io, 107 int is_in) 108 { 109 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); 110 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 111 unsigned int rate = 0; 112 int is_play = rsnd_io_is_play(io); 113 114 /* 115 * Playback 116 * runtime_rate -> [SRC] -> convert_rate 117 * 118 * Capture 119 * convert_rate -> [SRC] -> runtime_rate 120 */ 121 122 if (is_play == is_in) 123 return runtime->rate; 124 125 /* 126 * return convert rate if SRC is used, 127 * otherwise, return runtime->rate as usual 128 */ 129 if (src_mod) 130 rate = rsnd_src_convert_rate(io, src_mod); 131 132 if (!rate) 133 rate = runtime->rate; 134 135 return rate; 136 } 137 138 const static u32 bsdsr_table_pattern1[] = { 139 0x01800000, /* 6 - 1/6 */ 140 0x01000000, /* 6 - 1/4 */ 141 0x00c00000, /* 6 - 1/3 */ 142 0x00800000, /* 6 - 1/2 */ 143 0x00600000, /* 6 - 2/3 */ 144 0x00400000, /* 6 - 1 */ 145 }; 146 147 const static u32 bsdsr_table_pattern2[] = { 148 0x02400000, /* 6 - 1/6 */ 149 0x01800000, /* 6 - 1/4 */ 150 0x01200000, /* 6 - 1/3 */ 151 0x00c00000, /* 6 - 1/2 */ 152 0x00900000, /* 6 - 2/3 */ 153 0x00600000, /* 6 - 1 */ 154 }; 155 156 const static u32 bsisr_table[] = { 157 0x00100060, /* 6 - 1/6 */ 158 0x00100040, /* 6 - 1/4 */ 159 0x00100030, /* 6 - 1/3 */ 160 0x00100020, /* 6 - 1/2 */ 161 0x00100020, /* 6 - 2/3 */ 162 0x00100020, /* 6 - 1 */ 163 }; 164 165 const static u32 chan288888[] = { 166 0x00000006, /* 1 to 2 */ 167 0x000001fe, /* 1 to 8 */ 168 0x000001fe, /* 1 to 8 */ 169 0x000001fe, /* 1 to 8 */ 170 0x000001fe, /* 1 to 8 */ 171 0x000001fe, /* 1 to 8 */ 172 }; 173 174 const static u32 chan244888[] = { 175 0x00000006, /* 1 to 2 */ 176 0x0000001e, /* 1 to 4 */ 177 0x0000001e, /* 1 to 4 */ 178 0x000001fe, /* 1 to 8 */ 179 0x000001fe, /* 1 to 8 */ 180 0x000001fe, /* 1 to 8 */ 181 }; 182 183 const static u32 chan222222[] = { 184 0x00000006, /* 1 to 2 */ 185 0x00000006, /* 1 to 2 */ 186 0x00000006, /* 1 to 2 */ 187 0x00000006, /* 1 to 2 */ 188 0x00000006, /* 1 to 2 */ 189 0x00000006, /* 1 to 2 */ 190 }; 191 192 static const struct soc_device_attribute ov_soc[] = { 193 { .soc_id = "r8a77990" }, /* E3 */ 194 { /* sentinel */ } 195 }; 196 197 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io, 198 struct rsnd_mod *mod) 199 { 200 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 201 struct device *dev = rsnd_priv_to_dev(priv); 202 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 203 const struct soc_device_attribute *soc = soc_device_match(ov_soc); 204 int is_play = rsnd_io_is_play(io); 205 int use_src = 0; 206 u32 fin, fout; 207 u32 ifscr, fsrate, adinr; 208 u32 cr, route; 209 u32 i_busif, o_busif, tmp; 210 const u32 *bsdsr_table; 211 const u32 *chptn; 212 uint ratio; 213 int chan; 214 int idx; 215 216 if (!runtime) 217 return; 218 219 fin = rsnd_src_get_in_rate(priv, io); 220 fout = rsnd_src_get_out_rate(priv, io); 221 222 chan = rsnd_runtime_channel_original(io); 223 224 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ 225 if (fin == fout) 226 ratio = 0; 227 else if (fin > fout) 228 ratio = 100 * fin / fout; 229 else 230 ratio = 100 * fout / fin; 231 232 if (ratio > 600) { 233 dev_err(dev, "FSO/FSI ratio error\n"); 234 return; 235 } 236 237 use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod); 238 239 /* 240 * SRC_ADINR 241 */ 242 adinr = rsnd_get_adinr_bit(mod, io) | chan; 243 244 /* 245 * SRC_IFSCR / SRC_IFSVR 246 */ 247 ifscr = 0; 248 fsrate = 0; 249 if (use_src) { 250 u64 n; 251 252 ifscr = 1; 253 n = (u64)0x0400000 * fin; 254 do_div(n, fout); 255 fsrate = n; 256 } 257 258 /* 259 * SRC_SRCCR / SRC_ROUTE_MODE0 260 */ 261 cr = 0x00011110; 262 route = 0x0; 263 if (use_src) { 264 route = 0x1; 265 266 if (rsnd_src_sync_is_enabled(mod)) { 267 cr |= 0x1; 268 route |= rsnd_io_is_play(io) ? 269 (0x1 << 24) : (0x1 << 25); 270 } 271 } 272 273 /* 274 * SRC_BSDSR / SRC_BSISR 275 * 276 * see 277 * Combination of Register Setting Related to 278 * FSO/FSI Ratio and Channel, Latency 279 */ 280 switch (rsnd_mod_id(mod)) { 281 case 0: 282 chptn = chan288888; 283 bsdsr_table = bsdsr_table_pattern1; 284 break; 285 case 1: 286 case 3: 287 case 4: 288 chptn = chan244888; 289 bsdsr_table = bsdsr_table_pattern1; 290 break; 291 case 2: 292 case 9: 293 chptn = chan222222; 294 bsdsr_table = bsdsr_table_pattern1; 295 break; 296 case 5: 297 case 6: 298 case 7: 299 case 8: 300 chptn = chan222222; 301 bsdsr_table = bsdsr_table_pattern2; 302 break; 303 default: 304 goto convert_rate_err; 305 } 306 307 /* 308 * E3 need to overwrite 309 */ 310 if (soc) 311 switch (rsnd_mod_id(mod)) { 312 case 0: 313 case 4: 314 chptn = chan222222; 315 } 316 317 for (idx = 0; idx < ARRAY_SIZE(chan222222); idx++) 318 if (chptn[idx] & (1 << chan)) 319 break; 320 321 if (chan > 8 || 322 idx >= ARRAY_SIZE(chan222222)) 323 goto convert_rate_err; 324 325 /* BUSIF_MODE */ 326 tmp = rsnd_get_busif_shift(io, mod); 327 i_busif = ( is_play ? tmp : 0) | 1; 328 o_busif = (!is_play ? tmp : 0) | 1; 329 330 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); 331 332 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */ 333 rsnd_mod_write(mod, SRC_ADINR, adinr); 334 rsnd_mod_write(mod, SRC_IFSCR, ifscr); 335 rsnd_mod_write(mod, SRC_IFSVR, fsrate); 336 rsnd_mod_write(mod, SRC_SRCCR, cr); 337 rsnd_mod_write(mod, SRC_BSDSR, bsdsr_table[idx]); 338 rsnd_mod_write(mod, SRC_BSISR, bsisr_table[idx]); 339 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ 340 341 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif); 342 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif); 343 344 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); 345 346 rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout); 347 348 return; 349 350 convert_rate_err: 351 dev_err(dev, "unknown BSDSR/BSDIR settings\n"); 352 } 353 354 static int rsnd_src_irq(struct rsnd_mod *mod, 355 struct rsnd_dai_stream *io, 356 struct rsnd_priv *priv, 357 int enable) 358 { 359 struct rsnd_src *src = rsnd_mod_to_src(mod); 360 u32 sys_int_val, int_val, sys_int_mask; 361 int irq = src->irq; 362 int id = rsnd_mod_id(mod); 363 364 sys_int_val = 365 sys_int_mask = OUF_SRC(id); 366 int_val = 0x3300; 367 368 /* 369 * IRQ is not supported on non-DT 370 * see 371 * rsnd_src_probe_() 372 */ 373 if ((irq <= 0) || !enable) { 374 sys_int_val = 0; 375 int_val = 0; 376 } 377 378 /* 379 * WORKAROUND 380 * 381 * ignore over flow error when rsnd_src_sync_is_enabled() 382 */ 383 if (rsnd_src_sync_is_enabled(mod)) 384 sys_int_val = sys_int_val & 0xffff; 385 386 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val); 387 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val); 388 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val); 389 390 return 0; 391 } 392 393 static void rsnd_src_status_clear(struct rsnd_mod *mod) 394 { 395 u32 val = OUF_SRC(rsnd_mod_id(mod)); 396 397 rsnd_mod_write(mod, SCU_SYS_STATUS0, val); 398 rsnd_mod_write(mod, SCU_SYS_STATUS1, val); 399 } 400 401 static bool rsnd_src_error_occurred(struct rsnd_mod *mod) 402 { 403 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 404 struct device *dev = rsnd_priv_to_dev(priv); 405 u32 val0, val1; 406 u32 status0, status1; 407 bool ret = false; 408 409 val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); 410 411 /* 412 * WORKAROUND 413 * 414 * ignore over flow error when rsnd_src_sync_is_enabled() 415 */ 416 if (rsnd_src_sync_is_enabled(mod)) 417 val0 = val0 & 0xffff; 418 419 status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0); 420 status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1); 421 if ((status0 & val0) || (status1 & val1)) { 422 rsnd_dbg_irq_status(dev, "%s err status : 0x%08x, 0x%08x\n", 423 rsnd_mod_name(mod), status0, status1); 424 425 ret = true; 426 } 427 428 return ret; 429 } 430 431 static int rsnd_src_start(struct rsnd_mod *mod, 432 struct rsnd_dai_stream *io, 433 struct rsnd_priv *priv) 434 { 435 u32 val; 436 437 /* 438 * WORKAROUND 439 * 440 * Enable SRC output if you want to use sync convert together with DVC 441 */ 442 val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ? 443 0x01 : 0x11; 444 445 rsnd_mod_write(mod, SRC_CTRL, val); 446 447 return 0; 448 } 449 450 static int rsnd_src_stop(struct rsnd_mod *mod, 451 struct rsnd_dai_stream *io, 452 struct rsnd_priv *priv) 453 { 454 rsnd_mod_write(mod, SRC_CTRL, 0); 455 456 return 0; 457 } 458 459 static int rsnd_src_init(struct rsnd_mod *mod, 460 struct rsnd_dai_stream *io, 461 struct rsnd_priv *priv) 462 { 463 struct rsnd_src *src = rsnd_mod_to_src(mod); 464 465 /* reset sync convert_rate */ 466 src->sync.val = 0; 467 468 rsnd_mod_power_on(mod); 469 470 rsnd_src_activation(mod); 471 472 rsnd_src_set_convert_rate(io, mod); 473 474 rsnd_src_status_clear(mod); 475 476 return 0; 477 } 478 479 static int rsnd_src_quit(struct rsnd_mod *mod, 480 struct rsnd_dai_stream *io, 481 struct rsnd_priv *priv) 482 { 483 struct rsnd_src *src = rsnd_mod_to_src(mod); 484 485 rsnd_src_halt(mod); 486 487 rsnd_mod_power_off(mod); 488 489 /* reset sync convert_rate */ 490 src->sync.val = 0; 491 492 return 0; 493 } 494 495 static void __rsnd_src_interrupt(struct rsnd_mod *mod, 496 struct rsnd_dai_stream *io) 497 { 498 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 499 bool stop = false; 500 501 spin_lock(&priv->lock); 502 503 /* ignore all cases if not working */ 504 if (!rsnd_io_is_working(io)) 505 goto rsnd_src_interrupt_out; 506 507 if (rsnd_src_error_occurred(mod)) 508 stop = true; 509 510 rsnd_src_status_clear(mod); 511 rsnd_src_interrupt_out: 512 513 spin_unlock(&priv->lock); 514 515 if (stop) 516 snd_pcm_stop_xrun(io->substream); 517 } 518 519 static irqreturn_t rsnd_src_interrupt(int irq, void *data) 520 { 521 struct rsnd_mod *mod = data; 522 523 rsnd_mod_interrupt(mod, __rsnd_src_interrupt); 524 525 return IRQ_HANDLED; 526 } 527 528 static int rsnd_src_probe_(struct rsnd_mod *mod, 529 struct rsnd_dai_stream *io, 530 struct rsnd_priv *priv) 531 { 532 struct rsnd_src *src = rsnd_mod_to_src(mod); 533 struct device *dev = rsnd_priv_to_dev(priv); 534 int irq = src->irq; 535 int ret; 536 537 if (irq > 0) { 538 /* 539 * IRQ is not supported on non-DT 540 * see 541 * rsnd_src_irq() 542 */ 543 ret = devm_request_irq(dev, irq, 544 rsnd_src_interrupt, 545 IRQF_SHARED, 546 dev_name(dev), mod); 547 if (ret) 548 return ret; 549 } 550 551 ret = rsnd_dma_attach(io, mod, &src->dma); 552 553 return ret; 554 } 555 556 static int rsnd_src_pcm_new(struct rsnd_mod *mod, 557 struct rsnd_dai_stream *io, 558 struct snd_soc_pcm_runtime *rtd) 559 { 560 struct rsnd_src *src = rsnd_mod_to_src(mod); 561 int ret; 562 563 /* 564 * enable SRC sync convert if possible 565 */ 566 567 /* 568 * It can't use SRC Synchronous convert 569 * when Capture if it uses CMD 570 */ 571 if (rsnd_io_to_mod_cmd(io) && !rsnd_io_is_play(io)) 572 return 0; 573 574 /* 575 * enable sync convert 576 */ 577 ret = rsnd_kctrl_new_s(mod, io, rtd, 578 rsnd_io_is_play(io) ? 579 "SRC Out Rate Switch" : 580 "SRC In Rate Switch", 581 rsnd_kctrl_accept_anytime, 582 rsnd_src_set_convert_rate, 583 &src->sen, 1); 584 if (ret < 0) 585 return ret; 586 587 ret = rsnd_kctrl_new_s(mod, io, rtd, 588 rsnd_io_is_play(io) ? 589 "SRC Out Rate" : 590 "SRC In Rate", 591 rsnd_kctrl_accept_runtime, 592 rsnd_src_set_convert_rate, 593 &src->sync, 192000); 594 595 return ret; 596 } 597 598 static struct rsnd_mod_ops rsnd_src_ops = { 599 .name = SRC_NAME, 600 .dma_req = rsnd_src_dma_req, 601 .probe = rsnd_src_probe_, 602 .init = rsnd_src_init, 603 .quit = rsnd_src_quit, 604 .start = rsnd_src_start, 605 .stop = rsnd_src_stop, 606 .irq = rsnd_src_irq, 607 .pcm_new = rsnd_src_pcm_new, 608 .get_status = rsnd_mod_get_status, 609 }; 610 611 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id) 612 { 613 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv))) 614 id = 0; 615 616 return rsnd_mod_get(rsnd_src_get(priv, id)); 617 } 618 619 int rsnd_src_probe(struct rsnd_priv *priv) 620 { 621 struct device_node *node; 622 struct device_node *np; 623 struct device *dev = rsnd_priv_to_dev(priv); 624 struct rsnd_src *src; 625 struct clk *clk; 626 char name[RSND_SRC_NAME_SIZE]; 627 int i, nr, ret; 628 629 /* This driver doesn't support Gen1 at this point */ 630 if (rsnd_is_gen1(priv)) 631 return 0; 632 633 node = rsnd_src_of_node(priv); 634 if (!node) 635 return 0; /* not used is not error */ 636 637 nr = of_get_child_count(node); 638 if (!nr) { 639 ret = -EINVAL; 640 goto rsnd_src_probe_done; 641 } 642 643 src = devm_kcalloc(dev, nr, sizeof(*src), GFP_KERNEL); 644 if (!src) { 645 ret = -ENOMEM; 646 goto rsnd_src_probe_done; 647 } 648 649 priv->src_nr = nr; 650 priv->src = src; 651 652 i = 0; 653 for_each_child_of_node(node, np) { 654 if (!of_device_is_available(np)) 655 goto skip; 656 657 src = rsnd_src_get(priv, i); 658 659 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", 660 SRC_NAME, i); 661 662 src->irq = irq_of_parse_and_map(np, 0); 663 if (!src->irq) { 664 ret = -EINVAL; 665 of_node_put(np); 666 goto rsnd_src_probe_done; 667 } 668 669 clk = devm_clk_get(dev, name); 670 if (IS_ERR(clk)) { 671 ret = PTR_ERR(clk); 672 of_node_put(np); 673 goto rsnd_src_probe_done; 674 } 675 676 ret = rsnd_mod_init(priv, rsnd_mod_get(src), 677 &rsnd_src_ops, clk, RSND_MOD_SRC, i); 678 if (ret) { 679 of_node_put(np); 680 goto rsnd_src_probe_done; 681 } 682 683 skip: 684 i++; 685 } 686 687 ret = 0; 688 689 rsnd_src_probe_done: 690 of_node_put(node); 691 692 return ret; 693 } 694 695 void rsnd_src_remove(struct rsnd_priv *priv) 696 { 697 struct rsnd_src *src; 698 int i; 699 700 for_each_rsnd_src(src, priv, i) { 701 rsnd_mod_quit(rsnd_mod_get(src)); 702 } 703 } 704