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 use Synchronous Sampling Rate Convert (if no DVC) 10 * 11 * amixer set "SRC Out Rate" on 12 * aplay xxx.wav & 13 * amixer set "SRC Out Rate" 96000 // convert rate to 96000Hz 14 * amixer set "SRC Out Rate" 22050 // convert rate to 22050Hz 15 */ 16 17 /* 18 * you can enable below define if you don't need 19 * SSI interrupt status debug message when debugging 20 * see rsnd_print_irq_status() 21 * 22 * #define RSND_DEBUG_NO_IRQ_STATUS 1 23 */ 24 25 #include "rsnd.h" 26 27 #define SRC_NAME "src" 28 29 /* SCU_SYSTEM_STATUS0/1 */ 30 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id)) 31 32 struct rsnd_src { 33 struct rsnd_mod mod; 34 struct rsnd_mod *dma; 35 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */ 36 struct rsnd_kctrl_cfg_s sync; /* sync convert */ 37 int irq; 38 }; 39 40 #define RSND_SRC_NAME_SIZE 16 41 42 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id) 43 #define rsnd_src_nr(priv) ((priv)->src_nr) 44 #define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val) 45 46 #define rsnd_mod_to_src(_mod) \ 47 container_of((_mod), struct rsnd_src, mod) 48 49 #define for_each_rsnd_src(pos, priv, i) \ 50 for ((i) = 0; \ 51 ((i) < rsnd_src_nr(priv)) && \ 52 ((pos) = (struct rsnd_src *)(priv)->src + i); \ 53 i++) 54 55 56 /* 57 * image of SRC (Sampling Rate Converter) 58 * 59 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+ 60 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec | 61 * 44.1kHz <-> +-----+ +-----+ +-------+ 62 * ... 63 * 64 */ 65 66 static void rsnd_src_activation(struct rsnd_mod *mod) 67 { 68 rsnd_mod_write(mod, SRC_SWRSR, 0); 69 rsnd_mod_write(mod, SRC_SWRSR, 1); 70 } 71 72 static void rsnd_src_halt(struct rsnd_mod *mod) 73 { 74 rsnd_mod_write(mod, SRC_SRCIR, 1); 75 rsnd_mod_write(mod, SRC_SWRSR, 0); 76 } 77 78 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io, 79 struct rsnd_mod *mod) 80 { 81 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 82 int is_play = rsnd_io_is_play(io); 83 84 return rsnd_dma_request_channel(rsnd_src_of_node(priv), 85 SRC_NAME, mod, 86 is_play ? "rx" : "tx"); 87 } 88 89 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, 90 struct rsnd_mod *mod) 91 { 92 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 93 struct rsnd_src *src = rsnd_mod_to_src(mod); 94 u32 convert_rate; 95 96 if (!runtime) 97 return 0; 98 99 if (!rsnd_src_sync_is_enabled(mod)) 100 return rsnd_io_converted_rate(io); 101 102 convert_rate = src->sync.val; 103 104 if (!convert_rate) 105 convert_rate = rsnd_io_converted_rate(io); 106 107 if (!convert_rate) 108 convert_rate = runtime->rate; 109 110 return convert_rate; 111 } 112 113 unsigned int rsnd_src_get_rate(struct rsnd_priv *priv, 114 struct rsnd_dai_stream *io, 115 int is_in) 116 { 117 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); 118 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 119 unsigned int rate = 0; 120 int is_play = rsnd_io_is_play(io); 121 122 /* 123 * Playback 124 * runtime_rate -> [SRC] -> convert_rate 125 * 126 * Capture 127 * convert_rate -> [SRC] -> runtime_rate 128 */ 129 130 if (is_play == is_in) 131 return runtime->rate; 132 133 /* 134 * return convert rate if SRC is used, 135 * otherwise, return runtime->rate as usual 136 */ 137 if (src_mod) 138 rate = rsnd_src_convert_rate(io, src_mod); 139 140 if (!rate) 141 rate = runtime->rate; 142 143 return rate; 144 } 145 146 static const u32 bsdsr_table_pattern1[] = { 147 0x01800000, /* 6 - 1/6 */ 148 0x01000000, /* 6 - 1/4 */ 149 0x00c00000, /* 6 - 1/3 */ 150 0x00800000, /* 6 - 1/2 */ 151 0x00600000, /* 6 - 2/3 */ 152 0x00400000, /* 6 - 1 */ 153 }; 154 155 static const u32 bsdsr_table_pattern2[] = { 156 0x02400000, /* 6 - 1/6 */ 157 0x01800000, /* 6 - 1/4 */ 158 0x01200000, /* 6 - 1/3 */ 159 0x00c00000, /* 6 - 1/2 */ 160 0x00900000, /* 6 - 2/3 */ 161 0x00600000, /* 6 - 1 */ 162 }; 163 164 static const u32 bsisr_table[] = { 165 0x00100060, /* 6 - 1/6 */ 166 0x00100040, /* 6 - 1/4 */ 167 0x00100030, /* 6 - 1/3 */ 168 0x00100020, /* 6 - 1/2 */ 169 0x00100020, /* 6 - 2/3 */ 170 0x00100020, /* 6 - 1 */ 171 }; 172 173 static const u32 chan288888[] = { 174 0x00000006, /* 1 to 2 */ 175 0x000001fe, /* 1 to 8 */ 176 0x000001fe, /* 1 to 8 */ 177 0x000001fe, /* 1 to 8 */ 178 0x000001fe, /* 1 to 8 */ 179 0x000001fe, /* 1 to 8 */ 180 }; 181 182 static const u32 chan244888[] = { 183 0x00000006, /* 1 to 2 */ 184 0x0000001e, /* 1 to 4 */ 185 0x0000001e, /* 1 to 4 */ 186 0x000001fe, /* 1 to 8 */ 187 0x000001fe, /* 1 to 8 */ 188 0x000001fe, /* 1 to 8 */ 189 }; 190 191 static const u32 chan222222[] = { 192 0x00000006, /* 1 to 2 */ 193 0x00000006, /* 1 to 2 */ 194 0x00000006, /* 1 to 2 */ 195 0x00000006, /* 1 to 2 */ 196 0x00000006, /* 1 to 2 */ 197 0x00000006, /* 1 to 2 */ 198 }; 199 200 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io, 201 struct rsnd_mod *mod) 202 { 203 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 204 struct device *dev = rsnd_priv_to_dev(priv); 205 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 206 int is_play = rsnd_io_is_play(io); 207 int use_src = 0; 208 u32 fin, fout; 209 u32 ifscr, fsrate, adinr; 210 u32 cr, route; 211 u32 i_busif, o_busif, tmp; 212 const u32 *bsdsr_table; 213 const u32 *chptn; 214 uint ratio; 215 int chan; 216 int idx; 217 218 if (!runtime) 219 return; 220 221 fin = rsnd_src_get_in_rate(priv, io); 222 fout = rsnd_src_get_out_rate(priv, io); 223 224 chan = rsnd_runtime_channel_original(io); 225 226 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ 227 if (fin == fout) 228 ratio = 0; 229 else if (fin > fout) 230 ratio = 100 * fin / fout; 231 else 232 ratio = 100 * fout / fin; 233 234 if (ratio > 600) { 235 dev_err(dev, "FSO/FSI ratio error\n"); 236 return; 237 } 238 239 use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod); 240 241 /* 242 * SRC_ADINR 243 */ 244 adinr = rsnd_get_adinr_bit(mod, io) | chan; 245 246 /* 247 * SRC_IFSCR / SRC_IFSVR 248 */ 249 ifscr = 0; 250 fsrate = 0; 251 if (use_src) { 252 u64 n; 253 254 ifscr = 1; 255 n = (u64)0x0400000 * fin; 256 do_div(n, fout); 257 fsrate = n; 258 } 259 260 /* 261 * SRC_SRCCR / SRC_ROUTE_MODE0 262 */ 263 cr = 0x00011110; 264 route = 0x0; 265 if (use_src) { 266 route = 0x1; 267 268 if (rsnd_src_sync_is_enabled(mod)) { 269 cr |= 0x1; 270 route |= rsnd_io_is_play(io) ? 271 (0x1 << 24) : (0x1 << 25); 272 } 273 } 274 275 /* 276 * SRC_BSDSR / SRC_BSISR 277 * 278 * see 279 * Combination of Register Setting Related to 280 * FSO/FSI Ratio and Channel, Latency 281 */ 282 switch (rsnd_mod_id(mod)) { 283 case 0: 284 chptn = chan288888; 285 bsdsr_table = bsdsr_table_pattern1; 286 break; 287 case 1: 288 case 3: 289 case 4: 290 chptn = chan244888; 291 bsdsr_table = bsdsr_table_pattern1; 292 break; 293 case 2: 294 case 9: 295 chptn = chan222222; 296 bsdsr_table = bsdsr_table_pattern1; 297 break; 298 case 5: 299 case 6: 300 case 7: 301 case 8: 302 chptn = chan222222; 303 bsdsr_table = bsdsr_table_pattern2; 304 break; 305 default: 306 goto convert_rate_err; 307 } 308 309 /* 310 * E3 need to overwrite 311 */ 312 if (rsnd_is_e3(priv)) 313 switch (rsnd_mod_id(mod)) { 314 case 0: 315 case 4: 316 chptn = chan222222; 317 } 318 319 for (idx = 0; idx < ARRAY_SIZE(chan222222); idx++) 320 if (chptn[idx] & (1 << chan)) 321 break; 322 323 if (chan > 8 || 324 idx >= ARRAY_SIZE(chan222222)) 325 goto convert_rate_err; 326 327 /* BUSIF_MODE */ 328 tmp = rsnd_get_busif_shift(io, mod); 329 i_busif = ( is_play ? tmp : 0) | 1; 330 o_busif = (!is_play ? tmp : 0) | 1; 331 332 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); 333 334 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */ 335 rsnd_mod_write(mod, SRC_ADINR, adinr); 336 rsnd_mod_write(mod, SRC_IFSCR, ifscr); 337 rsnd_mod_write(mod, SRC_IFSVR, fsrate); 338 rsnd_mod_write(mod, SRC_SRCCR, cr); 339 rsnd_mod_write(mod, SRC_BSDSR, bsdsr_table[idx]); 340 rsnd_mod_write(mod, SRC_BSISR, bsisr_table[idx]); 341 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ 342 343 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif); 344 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif); 345 346 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); 347 348 rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout); 349 350 return; 351 352 convert_rate_err: 353 dev_err(dev, "unknown BSDSR/BSDIR settings\n"); 354 } 355 356 static int rsnd_src_irq(struct rsnd_mod *mod, 357 struct rsnd_dai_stream *io, 358 struct rsnd_priv *priv, 359 int enable) 360 { 361 struct rsnd_src *src = rsnd_mod_to_src(mod); 362 u32 sys_int_val, int_val, sys_int_mask; 363 int irq = src->irq; 364 int id = rsnd_mod_id(mod); 365 366 sys_int_val = 367 sys_int_mask = OUF_SRC(id); 368 int_val = 0x3300; 369 370 /* 371 * IRQ is not supported on non-DT 372 * see 373 * rsnd_src_probe_() 374 */ 375 if ((irq <= 0) || !enable) { 376 sys_int_val = 0; 377 int_val = 0; 378 } 379 380 /* 381 * WORKAROUND 382 * 383 * ignore over flow error when rsnd_src_sync_is_enabled() 384 */ 385 if (rsnd_src_sync_is_enabled(mod)) 386 sys_int_val = sys_int_val & 0xffff; 387 388 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val); 389 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val); 390 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val); 391 392 return 0; 393 } 394 395 static void rsnd_src_status_clear(struct rsnd_mod *mod) 396 { 397 u32 val = OUF_SRC(rsnd_mod_id(mod)); 398 399 rsnd_mod_write(mod, SCU_SYS_STATUS0, val); 400 rsnd_mod_write(mod, SCU_SYS_STATUS1, val); 401 } 402 403 static bool rsnd_src_error_occurred(struct rsnd_mod *mod) 404 { 405 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 406 struct device *dev = rsnd_priv_to_dev(priv); 407 u32 val0, val1; 408 u32 status0, status1; 409 bool ret = false; 410 411 val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); 412 413 /* 414 * WORKAROUND 415 * 416 * ignore over flow error when rsnd_src_sync_is_enabled() 417 */ 418 if (rsnd_src_sync_is_enabled(mod)) 419 val0 = val0 & 0xffff; 420 421 status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0); 422 status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1); 423 if ((status0 & val0) || (status1 & val1)) { 424 rsnd_print_irq_status(dev, "%s err status : 0x%08x, 0x%08x\n", 425 rsnd_mod_name(mod), status0, status1); 426 427 ret = true; 428 } 429 430 return ret; 431 } 432 433 static int rsnd_src_start(struct rsnd_mod *mod, 434 struct rsnd_dai_stream *io, 435 struct rsnd_priv *priv) 436 { 437 u32 val; 438 439 /* 440 * WORKAROUND 441 * 442 * Enable SRC output if you want to use sync convert together with DVC 443 */ 444 val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ? 445 0x01 : 0x11; 446 447 rsnd_mod_write(mod, SRC_CTRL, val); 448 449 return 0; 450 } 451 452 static int rsnd_src_stop(struct rsnd_mod *mod, 453 struct rsnd_dai_stream *io, 454 struct rsnd_priv *priv) 455 { 456 rsnd_mod_write(mod, SRC_CTRL, 0); 457 458 return 0; 459 } 460 461 static int rsnd_src_init(struct rsnd_mod *mod, 462 struct rsnd_dai_stream *io, 463 struct rsnd_priv *priv) 464 { 465 struct rsnd_src *src = rsnd_mod_to_src(mod); 466 467 /* reset sync convert_rate */ 468 src->sync.val = 0; 469 470 rsnd_mod_power_on(mod); 471 472 rsnd_src_activation(mod); 473 474 rsnd_src_set_convert_rate(io, mod); 475 476 rsnd_src_status_clear(mod); 477 478 return 0; 479 } 480 481 static int rsnd_src_quit(struct rsnd_mod *mod, 482 struct rsnd_dai_stream *io, 483 struct rsnd_priv *priv) 484 { 485 struct rsnd_src *src = rsnd_mod_to_src(mod); 486 487 rsnd_src_halt(mod); 488 489 rsnd_mod_power_off(mod); 490 491 /* reset sync convert_rate */ 492 src->sync.val = 0; 493 494 return 0; 495 } 496 497 static void __rsnd_src_interrupt(struct rsnd_mod *mod, 498 struct rsnd_dai_stream *io) 499 { 500 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 501 bool stop = false; 502 503 spin_lock(&priv->lock); 504 505 /* ignore all cases if not working */ 506 if (!rsnd_io_is_working(io)) 507 goto rsnd_src_interrupt_out; 508 509 if (rsnd_src_error_occurred(mod)) 510 stop = true; 511 512 rsnd_src_status_clear(mod); 513 rsnd_src_interrupt_out: 514 515 spin_unlock(&priv->lock); 516 517 if (stop) 518 snd_pcm_stop_xrun(io->substream); 519 } 520 521 static irqreturn_t rsnd_src_interrupt(int irq, void *data) 522 { 523 struct rsnd_mod *mod = data; 524 525 rsnd_mod_interrupt(mod, __rsnd_src_interrupt); 526 527 return IRQ_HANDLED; 528 } 529 530 static int rsnd_src_probe_(struct rsnd_mod *mod, 531 struct rsnd_dai_stream *io, 532 struct rsnd_priv *priv) 533 { 534 struct rsnd_src *src = rsnd_mod_to_src(mod); 535 struct device *dev = rsnd_priv_to_dev(priv); 536 int irq = src->irq; 537 int ret; 538 539 if (irq > 0) { 540 /* 541 * IRQ is not supported on non-DT 542 * see 543 * rsnd_src_irq() 544 */ 545 ret = devm_request_irq(dev, irq, 546 rsnd_src_interrupt, 547 IRQF_SHARED, 548 dev_name(dev), mod); 549 if (ret) 550 return ret; 551 } 552 553 ret = rsnd_dma_attach(io, mod, &src->dma); 554 555 return ret; 556 } 557 558 static int rsnd_src_pcm_new(struct rsnd_mod *mod, 559 struct rsnd_dai_stream *io, 560 struct snd_soc_pcm_runtime *rtd) 561 { 562 struct rsnd_src *src = rsnd_mod_to_src(mod); 563 int ret; 564 565 /* 566 * enable SRC sync convert if possible 567 */ 568 569 /* 570 * It can't use SRC Synchronous convert 571 * when Capture if it uses CMD 572 */ 573 if (rsnd_io_to_mod_cmd(io) && !rsnd_io_is_play(io)) 574 return 0; 575 576 /* 577 * enable sync convert 578 */ 579 ret = rsnd_kctrl_new_s(mod, io, rtd, 580 rsnd_io_is_play(io) ? 581 "SRC Out Rate Switch" : 582 "SRC In Rate Switch", 583 rsnd_kctrl_accept_anytime, 584 rsnd_src_set_convert_rate, 585 &src->sen, 1); 586 if (ret < 0) 587 return ret; 588 589 ret = rsnd_kctrl_new_s(mod, io, rtd, 590 rsnd_io_is_play(io) ? 591 "SRC Out Rate" : 592 "SRC In Rate", 593 rsnd_kctrl_accept_runtime, 594 rsnd_src_set_convert_rate, 595 &src->sync, 192000); 596 597 return ret; 598 } 599 600 #ifdef CONFIG_DEBUG_FS 601 static void rsnd_src_debug_info(struct seq_file *m, 602 struct rsnd_dai_stream *io, 603 struct rsnd_mod *mod) 604 { 605 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, 606 rsnd_mod_id(mod) * 0x20, 0x20); 607 seq_puts(m, "\n"); 608 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, 609 0x1c0, 0x20); 610 seq_puts(m, "\n"); 611 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, 612 0x200 + rsnd_mod_id(mod) * 0x40, 0x40); 613 } 614 #define DEBUG_INFO .debug_info = rsnd_src_debug_info 615 #else 616 #define DEBUG_INFO 617 #endif 618 619 static struct rsnd_mod_ops rsnd_src_ops = { 620 .name = SRC_NAME, 621 .dma_req = rsnd_src_dma_req, 622 .probe = rsnd_src_probe_, 623 .init = rsnd_src_init, 624 .quit = rsnd_src_quit, 625 .start = rsnd_src_start, 626 .stop = rsnd_src_stop, 627 .irq = rsnd_src_irq, 628 .pcm_new = rsnd_src_pcm_new, 629 .get_status = rsnd_mod_get_status, 630 DEBUG_INFO 631 }; 632 633 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id) 634 { 635 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv))) 636 id = 0; 637 638 return rsnd_mod_get(rsnd_src_get(priv, id)); 639 } 640 641 int rsnd_src_probe(struct rsnd_priv *priv) 642 { 643 struct device_node *node; 644 struct device_node *np; 645 struct device *dev = rsnd_priv_to_dev(priv); 646 struct rsnd_src *src; 647 struct clk *clk; 648 char name[RSND_SRC_NAME_SIZE]; 649 int i, nr, ret; 650 651 /* This driver doesn't support Gen1 at this point */ 652 if (rsnd_is_gen1(priv)) 653 return 0; 654 655 node = rsnd_src_of_node(priv); 656 if (!node) 657 return 0; /* not used is not error */ 658 659 nr = rsnd_node_count(priv, node, SRC_NAME); 660 if (!nr) { 661 ret = -EINVAL; 662 goto rsnd_src_probe_done; 663 } 664 665 src = devm_kcalloc(dev, nr, sizeof(*src), GFP_KERNEL); 666 if (!src) { 667 ret = -ENOMEM; 668 goto rsnd_src_probe_done; 669 } 670 671 priv->src_nr = nr; 672 priv->src = src; 673 674 i = 0; 675 for_each_child_of_node(node, np) { 676 if (!of_device_is_available(np)) 677 goto skip; 678 679 i = rsnd_node_fixed_index(dev, np, SRC_NAME, i); 680 if (i < 0) { 681 ret = -EINVAL; 682 of_node_put(np); 683 goto rsnd_src_probe_done; 684 } 685 686 src = rsnd_src_get(priv, i); 687 688 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", 689 SRC_NAME, i); 690 691 src->irq = irq_of_parse_and_map(np, 0); 692 if (!src->irq) { 693 ret = -EINVAL; 694 of_node_put(np); 695 goto rsnd_src_probe_done; 696 } 697 698 clk = devm_clk_get(dev, name); 699 if (IS_ERR(clk)) { 700 ret = PTR_ERR(clk); 701 of_node_put(np); 702 goto rsnd_src_probe_done; 703 } 704 705 ret = rsnd_mod_init(priv, rsnd_mod_get(src), 706 &rsnd_src_ops, clk, RSND_MOD_SRC, i); 707 if (ret) { 708 of_node_put(np); 709 goto rsnd_src_probe_done; 710 } 711 712 skip: 713 i++; 714 } 715 716 ret = 0; 717 718 rsnd_src_probe_done: 719 of_node_put(node); 720 721 return ret; 722 } 723 724 void rsnd_src_remove(struct rsnd_priv *priv) 725 { 726 struct rsnd_src *src; 727 int i; 728 729 for_each_rsnd_src(src, priv, i) { 730 rsnd_mod_quit(rsnd_mod_get(src)); 731 } 732 } 733