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 /* SCU_SYSTEM_STATUS0/1 */ 16 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id)) 17 18 struct rsnd_src { 19 struct rsnd_mod mod; 20 struct rsnd_mod *dma; 21 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */ 22 struct rsnd_kctrl_cfg_s sync; /* sync convert */ 23 u32 convert_rate; /* sampling rate convert */ 24 int irq; 25 }; 26 27 #define RSND_SRC_NAME_SIZE 16 28 29 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id) 30 #define rsnd_src_nr(priv) ((priv)->src_nr) 31 #define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val) 32 33 #define rsnd_mod_to_src(_mod) \ 34 container_of((_mod), struct rsnd_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 static void rsnd_src_activation(struct rsnd_mod *mod) 54 { 55 rsnd_mod_write(mod, SRC_SWRSR, 0); 56 rsnd_mod_write(mod, SRC_SWRSR, 1); 57 } 58 59 static void rsnd_src_halt(struct rsnd_mod *mod) 60 { 61 rsnd_mod_write(mod, SRC_SRCIR, 1); 62 rsnd_mod_write(mod, SRC_SWRSR, 0); 63 } 64 65 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io, 66 struct rsnd_mod *mod) 67 { 68 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 69 int is_play = rsnd_io_is_play(io); 70 71 return rsnd_dma_request_channel(rsnd_src_of_node(priv), 72 mod, 73 is_play ? "rx" : "tx"); 74 } 75 76 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, 77 struct rsnd_mod *mod) 78 { 79 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 80 struct rsnd_src *src = rsnd_mod_to_src(mod); 81 u32 convert_rate; 82 83 if (!runtime) 84 return 0; 85 86 if (!rsnd_src_sync_is_enabled(mod)) 87 return src->convert_rate; 88 89 convert_rate = src->sync.val; 90 91 if (!convert_rate) 92 convert_rate = src->convert_rate; 93 94 if (!convert_rate) 95 convert_rate = runtime->rate; 96 97 return convert_rate; 98 } 99 100 unsigned int rsnd_src_get_rate(struct rsnd_priv *priv, 101 struct rsnd_dai_stream *io, 102 int is_in) 103 { 104 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); 105 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 106 unsigned int rate = 0; 107 int is_play = rsnd_io_is_play(io); 108 109 /* 110 * Playback 111 * runtime_rate -> [SRC] -> convert_rate 112 * 113 * Capture 114 * convert_rate -> [SRC] -> runtime_rate 115 */ 116 117 if (is_play == is_in) 118 return runtime->rate; 119 120 /* 121 * return convert rate if SRC is used, 122 * otherwise, return runtime->rate as usual 123 */ 124 if (src_mod) 125 rate = rsnd_src_convert_rate(io, src_mod); 126 127 if (!rate) 128 rate = runtime->rate; 129 130 return rate; 131 } 132 133 static int rsnd_src_hw_params(struct rsnd_mod *mod, 134 struct rsnd_dai_stream *io, 135 struct snd_pcm_substream *substream, 136 struct snd_pcm_hw_params *fe_params) 137 { 138 struct rsnd_src *src = rsnd_mod_to_src(mod); 139 struct snd_soc_pcm_runtime *fe = substream->private_data; 140 141 /* 142 * SRC assumes that it is used under DPCM if user want to use 143 * sampling rate convert. Then, SRC should be FE. 144 * And then, this function will be called *after* BE settings. 145 * this means, each BE already has fixuped hw_params. 146 * see 147 * dpcm_fe_dai_hw_params() 148 * dpcm_be_dai_hw_params() 149 */ 150 src->convert_rate = 0; 151 if (fe->dai_link->dynamic) { 152 int stream = substream->stream; 153 struct snd_soc_dpcm *dpcm; 154 struct snd_pcm_hw_params *be_params; 155 156 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { 157 be_params = &dpcm->hw_params; 158 159 if (params_rate(fe_params) != params_rate(be_params)) 160 src->convert_rate = params_rate(be_params); 161 } 162 } 163 164 return 0; 165 } 166 167 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io, 168 struct rsnd_mod *mod) 169 { 170 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 171 struct device *dev = rsnd_priv_to_dev(priv); 172 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 173 int is_play = rsnd_io_is_play(io); 174 int use_src = 0; 175 u32 fin, fout; 176 u32 ifscr, fsrate, adinr; 177 u32 cr, route; 178 u32 bsdsr, bsisr; 179 u32 i_busif, o_busif, tmp; 180 uint ratio; 181 182 if (!runtime) 183 return; 184 185 fin = rsnd_src_get_in_rate(priv, io); 186 fout = rsnd_src_get_out_rate(priv, io); 187 188 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ 189 if (fin == fout) 190 ratio = 0; 191 else if (fin > fout) 192 ratio = 100 * fin / fout; 193 else 194 ratio = 100 * fout / fin; 195 196 if (ratio > 600) { 197 dev_err(dev, "FSO/FSI ratio error\n"); 198 return; 199 } 200 201 use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod); 202 203 /* 204 * SRC_ADINR 205 */ 206 adinr = rsnd_get_adinr_bit(mod, io) | 207 rsnd_runtime_channel_original(io); 208 209 /* 210 * SRC_IFSCR / SRC_IFSVR 211 */ 212 ifscr = 0; 213 fsrate = 0; 214 if (use_src) { 215 u64 n; 216 217 ifscr = 1; 218 n = (u64)0x0400000 * fin; 219 do_div(n, fout); 220 fsrate = n; 221 } 222 223 /* 224 * SRC_SRCCR / SRC_ROUTE_MODE0 225 */ 226 cr = 0x00011110; 227 route = 0x0; 228 if (use_src) { 229 route = 0x1; 230 231 if (rsnd_src_sync_is_enabled(mod)) { 232 cr |= 0x1; 233 route |= rsnd_io_is_play(io) ? 234 (0x1 << 24) : (0x1 << 25); 235 } 236 } 237 238 /* 239 * SRC_BSDSR / SRC_BSISR 240 */ 241 switch (rsnd_mod_id(mod)) { 242 case 5: 243 case 6: 244 case 7: 245 case 8: 246 bsdsr = 0x02400000; /* 6 - 1/6 */ 247 bsisr = 0x00100060; /* 6 - 1/6 */ 248 break; 249 default: 250 bsdsr = 0x01800000; /* 6 - 1/6 */ 251 bsisr = 0x00100060 ;/* 6 - 1/6 */ 252 break; 253 } 254 255 /* BUSIF_MODE */ 256 tmp = rsnd_get_busif_shift(io, mod); 257 i_busif = ( is_play ? tmp : 0) | 1; 258 o_busif = (!is_play ? tmp : 0) | 1; 259 260 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); 261 262 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */ 263 rsnd_mod_write(mod, SRC_ADINR, adinr); 264 rsnd_mod_write(mod, SRC_IFSCR, ifscr); 265 rsnd_mod_write(mod, SRC_IFSVR, fsrate); 266 rsnd_mod_write(mod, SRC_SRCCR, cr); 267 rsnd_mod_write(mod, SRC_BSDSR, bsdsr); 268 rsnd_mod_write(mod, SRC_BSISR, bsisr); 269 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ 270 271 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif); 272 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif); 273 274 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); 275 276 rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout); 277 } 278 279 static int rsnd_src_irq(struct rsnd_mod *mod, 280 struct rsnd_dai_stream *io, 281 struct rsnd_priv *priv, 282 int enable) 283 { 284 struct rsnd_src *src = rsnd_mod_to_src(mod); 285 u32 sys_int_val, int_val, sys_int_mask; 286 int irq = src->irq; 287 int id = rsnd_mod_id(mod); 288 289 sys_int_val = 290 sys_int_mask = OUF_SRC(id); 291 int_val = 0x3300; 292 293 /* 294 * IRQ is not supported on non-DT 295 * see 296 * rsnd_src_probe_() 297 */ 298 if ((irq <= 0) || !enable) { 299 sys_int_val = 0; 300 int_val = 0; 301 } 302 303 /* 304 * WORKAROUND 305 * 306 * ignore over flow error when rsnd_src_sync_is_enabled() 307 */ 308 if (rsnd_src_sync_is_enabled(mod)) 309 sys_int_val = sys_int_val & 0xffff; 310 311 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val); 312 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val); 313 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val); 314 315 return 0; 316 } 317 318 static void rsnd_src_status_clear(struct rsnd_mod *mod) 319 { 320 u32 val = OUF_SRC(rsnd_mod_id(mod)); 321 322 rsnd_mod_write(mod, SCU_SYS_STATUS0, val); 323 rsnd_mod_write(mod, SCU_SYS_STATUS1, val); 324 } 325 326 static bool rsnd_src_error_occurred(struct rsnd_mod *mod) 327 { 328 u32 val0, val1; 329 bool ret = false; 330 331 val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); 332 333 /* 334 * WORKAROUND 335 * 336 * ignore over flow error when rsnd_src_sync_is_enabled() 337 */ 338 if (rsnd_src_sync_is_enabled(mod)) 339 val0 = val0 & 0xffff; 340 341 if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) || 342 (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1)) 343 ret = true; 344 345 return ret; 346 } 347 348 static int rsnd_src_start(struct rsnd_mod *mod, 349 struct rsnd_dai_stream *io, 350 struct rsnd_priv *priv) 351 { 352 u32 val; 353 354 /* 355 * WORKAROUND 356 * 357 * Enable SRC output if you want to use sync convert together with DVC 358 */ 359 val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ? 360 0x01 : 0x11; 361 362 rsnd_mod_write(mod, SRC_CTRL, val); 363 364 return 0; 365 } 366 367 static int rsnd_src_stop(struct rsnd_mod *mod, 368 struct rsnd_dai_stream *io, 369 struct rsnd_priv *priv) 370 { 371 rsnd_mod_write(mod, SRC_CTRL, 0); 372 373 return 0; 374 } 375 376 static int rsnd_src_init(struct rsnd_mod *mod, 377 struct rsnd_dai_stream *io, 378 struct rsnd_priv *priv) 379 { 380 struct rsnd_src *src = rsnd_mod_to_src(mod); 381 382 /* reset sync convert_rate */ 383 src->sync.val = 0; 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 return 0; 394 } 395 396 static int rsnd_src_quit(struct rsnd_mod *mod, 397 struct rsnd_dai_stream *io, 398 struct rsnd_priv *priv) 399 { 400 struct rsnd_src *src = rsnd_mod_to_src(mod); 401 402 rsnd_src_halt(mod); 403 404 rsnd_mod_power_off(mod); 405 406 /* reset sync convert_rate */ 407 src->sync.val = 0; 408 409 return 0; 410 } 411 412 static void __rsnd_src_interrupt(struct rsnd_mod *mod, 413 struct rsnd_dai_stream *io) 414 { 415 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 416 bool stop = false; 417 418 spin_lock(&priv->lock); 419 420 /* ignore all cases if not working */ 421 if (!rsnd_io_is_working(io)) 422 goto rsnd_src_interrupt_out; 423 424 if (rsnd_src_error_occurred(mod)) 425 stop = true; 426 427 rsnd_src_status_clear(mod); 428 rsnd_src_interrupt_out: 429 430 spin_unlock(&priv->lock); 431 432 if (stop) 433 snd_pcm_stop_xrun(io->substream); 434 } 435 436 static irqreturn_t rsnd_src_interrupt(int irq, void *data) 437 { 438 struct rsnd_mod *mod = data; 439 440 rsnd_mod_interrupt(mod, __rsnd_src_interrupt); 441 442 return IRQ_HANDLED; 443 } 444 445 static int rsnd_src_probe_(struct rsnd_mod *mod, 446 struct rsnd_dai_stream *io, 447 struct rsnd_priv *priv) 448 { 449 struct rsnd_src *src = rsnd_mod_to_src(mod); 450 struct device *dev = rsnd_priv_to_dev(priv); 451 int irq = src->irq; 452 int ret; 453 454 if (irq > 0) { 455 /* 456 * IRQ is not supported on non-DT 457 * see 458 * rsnd_src_irq() 459 */ 460 ret = devm_request_irq(dev, irq, 461 rsnd_src_interrupt, 462 IRQF_SHARED, 463 dev_name(dev), mod); 464 if (ret) 465 return ret; 466 } 467 468 ret = rsnd_dma_attach(io, mod, &src->dma); 469 470 return ret; 471 } 472 473 static int rsnd_src_pcm_new(struct rsnd_mod *mod, 474 struct rsnd_dai_stream *io, 475 struct snd_soc_pcm_runtime *rtd) 476 { 477 struct rsnd_src *src = rsnd_mod_to_src(mod); 478 int ret; 479 480 /* 481 * enable SRC sync convert if possible 482 */ 483 484 /* 485 * It can't use SRC Synchronous convert 486 * when Capture if it uses CMD 487 */ 488 if (rsnd_io_to_mod_cmd(io) && !rsnd_io_is_play(io)) 489 return 0; 490 491 /* 492 * enable sync convert 493 */ 494 ret = rsnd_kctrl_new_s(mod, io, rtd, 495 rsnd_io_is_play(io) ? 496 "SRC Out Rate Switch" : 497 "SRC In Rate Switch", 498 rsnd_kctrl_accept_anytime, 499 rsnd_src_set_convert_rate, 500 &src->sen, 1); 501 if (ret < 0) 502 return ret; 503 504 ret = rsnd_kctrl_new_s(mod, io, rtd, 505 rsnd_io_is_play(io) ? 506 "SRC Out Rate" : 507 "SRC In Rate", 508 rsnd_kctrl_accept_runtime, 509 rsnd_src_set_convert_rate, 510 &src->sync, 192000); 511 512 return ret; 513 } 514 515 static struct rsnd_mod_ops rsnd_src_ops = { 516 .name = SRC_NAME, 517 .dma_req = rsnd_src_dma_req, 518 .probe = rsnd_src_probe_, 519 .init = rsnd_src_init, 520 .quit = rsnd_src_quit, 521 .start = rsnd_src_start, 522 .stop = rsnd_src_stop, 523 .irq = rsnd_src_irq, 524 .hw_params = rsnd_src_hw_params, 525 .pcm_new = rsnd_src_pcm_new, 526 }; 527 528 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id) 529 { 530 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv))) 531 id = 0; 532 533 return rsnd_mod_get(rsnd_src_get(priv, id)); 534 } 535 536 int rsnd_src_probe(struct rsnd_priv *priv) 537 { 538 struct device_node *node; 539 struct device_node *np; 540 struct device *dev = rsnd_priv_to_dev(priv); 541 struct rsnd_src *src; 542 struct clk *clk; 543 char name[RSND_SRC_NAME_SIZE]; 544 int i, nr, ret; 545 546 /* This driver doesn't support Gen1 at this point */ 547 if (rsnd_is_gen1(priv)) 548 return 0; 549 550 node = rsnd_src_of_node(priv); 551 if (!node) 552 return 0; /* not used is not error */ 553 554 nr = of_get_child_count(node); 555 if (!nr) { 556 ret = -EINVAL; 557 goto rsnd_src_probe_done; 558 } 559 560 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL); 561 if (!src) { 562 ret = -ENOMEM; 563 goto rsnd_src_probe_done; 564 } 565 566 priv->src_nr = nr; 567 priv->src = src; 568 569 i = 0; 570 for_each_child_of_node(node, np) { 571 if (!of_device_is_available(np)) 572 goto skip; 573 574 src = rsnd_src_get(priv, i); 575 576 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", 577 SRC_NAME, i); 578 579 src->irq = irq_of_parse_and_map(np, 0); 580 if (!src->irq) { 581 ret = -EINVAL; 582 of_node_put(np); 583 goto rsnd_src_probe_done; 584 } 585 586 clk = devm_clk_get(dev, name); 587 if (IS_ERR(clk)) { 588 ret = PTR_ERR(clk); 589 of_node_put(np); 590 goto rsnd_src_probe_done; 591 } 592 593 ret = rsnd_mod_init(priv, rsnd_mod_get(src), 594 &rsnd_src_ops, clk, rsnd_mod_get_status, 595 RSND_MOD_SRC, i); 596 if (ret) { 597 of_node_put(np); 598 goto rsnd_src_probe_done; 599 } 600 601 skip: 602 i++; 603 } 604 605 ret = 0; 606 607 rsnd_src_probe_done: 608 of_node_put(node); 609 610 return ret; 611 } 612 613 void rsnd_src_remove(struct rsnd_priv *priv) 614 { 615 struct rsnd_src *src; 616 int i; 617 618 for_each_rsnd_src(src, priv, i) { 619 rsnd_mod_quit(rsnd_mod_get(src)); 620 } 621 } 622