1 /* 2 * Renesas R-Car Audio DMAC support 3 * 4 * Copyright (C) 2015 Renesas Electronics Corp. 5 * Copyright (c) 2015 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 <linux/delay.h> 12 #include <linux/of_dma.h> 13 #include "rsnd.h" 14 15 /* 16 * Audio DMAC peri peri register 17 */ 18 #define PDMASAR 0x00 19 #define PDMADAR 0x04 20 #define PDMACHCR 0x0c 21 22 /* PDMACHCR */ 23 #define PDMACHCR_DE (1 << 0) 24 25 26 struct rsnd_dmaen { 27 struct dma_chan *chan; 28 dma_addr_t dma_buf; 29 unsigned int dma_len; 30 unsigned int dma_period; 31 unsigned int dma_cnt; 32 }; 33 34 struct rsnd_dmapp { 35 int dmapp_id; 36 u32 chcr; 37 }; 38 39 struct rsnd_dma { 40 struct rsnd_mod mod; 41 struct rsnd_mod *mod_from; 42 struct rsnd_mod *mod_to; 43 dma_addr_t src_addr; 44 dma_addr_t dst_addr; 45 union { 46 struct rsnd_dmaen en; 47 struct rsnd_dmapp pp; 48 } dma; 49 }; 50 51 struct rsnd_dma_ctrl { 52 void __iomem *base; 53 int dmaen_num; 54 int dmapp_num; 55 }; 56 57 #define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma) 58 #define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod) 59 #define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en) 60 #define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp) 61 62 /* 63 * Audio DMAC 64 */ 65 #define rsnd_dmaen_sync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 1) 66 #define rsnd_dmaen_unsync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 0) 67 static void __rsnd_dmaen_sync(struct rsnd_dmaen *dmaen, struct rsnd_dai_stream *io, 68 int i, int sync) 69 { 70 struct device *dev = dmaen->chan->device->dev; 71 enum dma_data_direction dir; 72 int is_play = rsnd_io_is_play(io); 73 dma_addr_t buf; 74 int len, max; 75 size_t period; 76 77 len = dmaen->dma_len; 78 period = dmaen->dma_period; 79 max = len / period; 80 i = i % max; 81 buf = dmaen->dma_buf + (period * i); 82 83 dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 84 85 if (sync) 86 dma_sync_single_for_device(dev, buf, period, dir); 87 else 88 dma_sync_single_for_cpu(dev, buf, period, dir); 89 } 90 91 static void __rsnd_dmaen_complete(struct rsnd_mod *mod, 92 struct rsnd_dai_stream *io) 93 { 94 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 95 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 96 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 97 bool elapsed = false; 98 unsigned long flags; 99 100 /* 101 * Renesas sound Gen1 needs 1 DMAC, 102 * Gen2 needs 2 DMAC. 103 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri. 104 * But, Audio-DMAC-peri-peri doesn't have interrupt, 105 * and this driver is assuming that here. 106 * 107 * If Audio-DMAC-peri-peri has interrpt, 108 * rsnd_dai_pointer_update() will be called twice, 109 * ant it will breaks io->byte_pos 110 */ 111 spin_lock_irqsave(&priv->lock, flags); 112 113 if (rsnd_io_is_working(io)) { 114 rsnd_dmaen_unsync(dmaen, io, dmaen->dma_cnt); 115 116 /* 117 * Next period is already started. 118 * Let's sync Next Next period 119 * see 120 * rsnd_dmaen_start() 121 */ 122 rsnd_dmaen_sync(dmaen, io, dmaen->dma_cnt + 2); 123 124 elapsed = rsnd_dai_pointer_update(io, io->byte_per_period); 125 126 dmaen->dma_cnt++; 127 } 128 129 spin_unlock_irqrestore(&priv->lock, flags); 130 131 if (elapsed) 132 rsnd_dai_period_elapsed(io); 133 } 134 135 static void rsnd_dmaen_complete(void *data) 136 { 137 struct rsnd_mod *mod = data; 138 139 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete); 140 } 141 142 static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io, 143 struct rsnd_mod *mod_from, 144 struct rsnd_mod *mod_to) 145 { 146 if ((!mod_from && !mod_to) || 147 (mod_from && mod_to)) 148 return NULL; 149 150 if (mod_from) 151 return rsnd_mod_dma_req(io, mod_from); 152 else 153 return rsnd_mod_dma_req(io, mod_to); 154 } 155 156 static int rsnd_dmaen_stop(struct rsnd_mod *mod, 157 struct rsnd_dai_stream *io, 158 struct rsnd_priv *priv) 159 { 160 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 161 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 162 163 if (dmaen->chan) { 164 int is_play = rsnd_io_is_play(io); 165 166 dmaengine_terminate_all(dmaen->chan); 167 dma_unmap_single(dmaen->chan->device->dev, 168 dmaen->dma_buf, dmaen->dma_len, 169 is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 170 } 171 172 return 0; 173 } 174 175 static int rsnd_dmaen_nolock_stop(struct rsnd_mod *mod, 176 struct rsnd_dai_stream *io, 177 struct rsnd_priv *priv) 178 { 179 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 180 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 181 182 /* 183 * DMAEngine release uses mutex lock. 184 * Thus, it shouldn't be called under spinlock. 185 * Let's call it under nolock_start 186 */ 187 if (dmaen->chan) 188 dma_release_channel(dmaen->chan); 189 190 dmaen->chan = NULL; 191 192 return 0; 193 } 194 195 static int rsnd_dmaen_nolock_start(struct rsnd_mod *mod, 196 struct rsnd_dai_stream *io, 197 struct rsnd_priv *priv) 198 { 199 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 200 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 201 struct device *dev = rsnd_priv_to_dev(priv); 202 203 if (dmaen->chan) { 204 dev_err(dev, "it already has dma channel\n"); 205 return -EIO; 206 } 207 208 /* 209 * DMAEngine request uses mutex lock. 210 * Thus, it shouldn't be called under spinlock. 211 * Let's call it under nolock_start 212 */ 213 dmaen->chan = rsnd_dmaen_request_channel(io, 214 dma->mod_from, 215 dma->mod_to); 216 if (IS_ERR_OR_NULL(dmaen->chan)) { 217 int ret = PTR_ERR(dmaen->chan); 218 219 dmaen->chan = NULL; 220 dev_err(dev, "can't get dma channel\n"); 221 return ret; 222 } 223 224 return 0; 225 } 226 227 static int rsnd_dmaen_start(struct rsnd_mod *mod, 228 struct rsnd_dai_stream *io, 229 struct rsnd_priv *priv) 230 { 231 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 232 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 233 struct snd_pcm_substream *substream = io->substream; 234 struct device *dev = rsnd_priv_to_dev(priv); 235 struct dma_async_tx_descriptor *desc; 236 struct dma_slave_config cfg = {}; 237 dma_addr_t buf; 238 size_t len; 239 size_t period; 240 int is_play = rsnd_io_is_play(io); 241 int i; 242 int ret; 243 244 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 245 cfg.src_addr = dma->src_addr; 246 cfg.dst_addr = dma->dst_addr; 247 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 248 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 249 250 dev_dbg(dev, "%s[%d] %pad -> %pad\n", 251 rsnd_mod_name(mod), rsnd_mod_id(mod), 252 &cfg.src_addr, &cfg.dst_addr); 253 254 ret = dmaengine_slave_config(dmaen->chan, &cfg); 255 if (ret < 0) 256 return ret; 257 258 len = snd_pcm_lib_buffer_bytes(substream); 259 period = snd_pcm_lib_period_bytes(substream); 260 buf = dma_map_single(dmaen->chan->device->dev, 261 substream->runtime->dma_area, 262 len, 263 is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 264 if (dma_mapping_error(dmaen->chan->device->dev, buf)) { 265 dev_err(dev, "dma map failed\n"); 266 return -EIO; 267 } 268 269 desc = dmaengine_prep_dma_cyclic(dmaen->chan, 270 buf, len, period, 271 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, 272 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 273 274 if (!desc) { 275 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 276 return -EIO; 277 } 278 279 desc->callback = rsnd_dmaen_complete; 280 desc->callback_param = rsnd_mod_get(dma); 281 282 dmaen->dma_buf = buf; 283 dmaen->dma_len = len; 284 dmaen->dma_period = period; 285 dmaen->dma_cnt = 0; 286 287 /* 288 * synchronize this and next period 289 * see 290 * __rsnd_dmaen_complete() 291 */ 292 for (i = 0; i < 2; i++) 293 rsnd_dmaen_sync(dmaen, io, i); 294 295 if (dmaengine_submit(desc) < 0) { 296 dev_err(dev, "dmaengine_submit() fail\n"); 297 return -EIO; 298 } 299 300 dma_async_issue_pending(dmaen->chan); 301 302 return 0; 303 } 304 305 struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node, 306 struct rsnd_mod *mod, char *name) 307 { 308 struct dma_chan *chan = NULL; 309 struct device_node *np; 310 int i = 0; 311 312 for_each_child_of_node(of_node, np) { 313 if (i == rsnd_mod_id(mod) && (!chan)) 314 chan = of_dma_request_slave_channel(np, name); 315 i++; 316 } 317 318 /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */ 319 of_node_put(of_node); 320 321 return chan; 322 } 323 324 static int rsnd_dmaen_attach(struct rsnd_dai_stream *io, 325 struct rsnd_dma *dma, 326 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 327 { 328 struct rsnd_priv *priv = rsnd_io_to_priv(io); 329 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 330 struct dma_chan *chan; 331 332 /* try to get DMAEngine channel */ 333 chan = rsnd_dmaen_request_channel(io, mod_from, mod_to); 334 if (IS_ERR_OR_NULL(chan)) { 335 /* 336 * DMA failed. try to PIO mode 337 * see 338 * rsnd_ssi_fallback() 339 * rsnd_rdai_continuance_probe() 340 */ 341 return -EAGAIN; 342 } 343 344 dma_release_channel(chan); 345 346 dmac->dmaen_num++; 347 348 return 0; 349 } 350 351 static struct rsnd_mod_ops rsnd_dmaen_ops = { 352 .name = "audmac", 353 .nolock_start = rsnd_dmaen_nolock_start, 354 .nolock_stop = rsnd_dmaen_nolock_stop, 355 .start = rsnd_dmaen_start, 356 .stop = rsnd_dmaen_stop, 357 }; 358 359 /* 360 * Audio DMAC peri peri 361 */ 362 static const u8 gen2_id_table_ssiu[] = { 363 0x00, /* SSI00 */ 364 0x04, /* SSI10 */ 365 0x08, /* SSI20 */ 366 0x0c, /* SSI3 */ 367 0x0d, /* SSI4 */ 368 0x0e, /* SSI5 */ 369 0x0f, /* SSI6 */ 370 0x10, /* SSI7 */ 371 0x11, /* SSI8 */ 372 0x12, /* SSI90 */ 373 }; 374 static const u8 gen2_id_table_scu[] = { 375 0x2d, /* SCU_SRCI0 */ 376 0x2e, /* SCU_SRCI1 */ 377 0x2f, /* SCU_SRCI2 */ 378 0x30, /* SCU_SRCI3 */ 379 0x31, /* SCU_SRCI4 */ 380 0x32, /* SCU_SRCI5 */ 381 0x33, /* SCU_SRCI6 */ 382 0x34, /* SCU_SRCI7 */ 383 0x35, /* SCU_SRCI8 */ 384 0x36, /* SCU_SRCI9 */ 385 }; 386 static const u8 gen2_id_table_cmd[] = { 387 0x37, /* SCU_CMD0 */ 388 0x38, /* SCU_CMD1 */ 389 }; 390 391 static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io, 392 struct rsnd_mod *mod) 393 { 394 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 395 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 396 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 397 const u8 *entry = NULL; 398 int id = rsnd_mod_id(mod); 399 int size = 0; 400 401 if (mod == ssi) { 402 entry = gen2_id_table_ssiu; 403 size = ARRAY_SIZE(gen2_id_table_ssiu); 404 } else if (mod == src) { 405 entry = gen2_id_table_scu; 406 size = ARRAY_SIZE(gen2_id_table_scu); 407 } else if (mod == dvc) { 408 entry = gen2_id_table_cmd; 409 size = ARRAY_SIZE(gen2_id_table_cmd); 410 } 411 412 if ((!entry) || (size <= id)) { 413 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io)); 414 415 dev_err(dev, "unknown connection (%s[%d])\n", 416 rsnd_mod_name(mod), rsnd_mod_id(mod)); 417 418 /* use non-prohibited SRS number as error */ 419 return 0x00; /* SSI00 */ 420 } 421 422 return entry[id]; 423 } 424 425 static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io, 426 struct rsnd_mod *mod_from, 427 struct rsnd_mod *mod_to) 428 { 429 return (rsnd_dmapp_get_id(io, mod_from) << 24) + 430 (rsnd_dmapp_get_id(io, mod_to) << 16); 431 } 432 433 #define rsnd_dmapp_addr(dmac, dma, reg) \ 434 (dmac->base + 0x20 + reg + \ 435 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id)) 436 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg) 437 { 438 struct rsnd_mod *mod = rsnd_mod_get(dma); 439 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 440 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 441 struct device *dev = rsnd_priv_to_dev(priv); 442 443 dev_dbg(dev, "w %p : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data); 444 445 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg)); 446 } 447 448 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg) 449 { 450 struct rsnd_mod *mod = rsnd_mod_get(dma); 451 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 452 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 453 454 return ioread32(rsnd_dmapp_addr(dmac, dma, reg)); 455 } 456 457 static int rsnd_dmapp_stop(struct rsnd_mod *mod, 458 struct rsnd_dai_stream *io, 459 struct rsnd_priv *priv) 460 { 461 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 462 int i; 463 464 rsnd_dmapp_write(dma, 0, PDMACHCR); 465 466 for (i = 0; i < 1024; i++) { 467 if (0 == rsnd_dmapp_read(dma, PDMACHCR)) 468 return 0; 469 udelay(1); 470 } 471 472 return -EIO; 473 } 474 475 static int rsnd_dmapp_start(struct rsnd_mod *mod, 476 struct rsnd_dai_stream *io, 477 struct rsnd_priv *priv) 478 { 479 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 480 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 481 482 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR); 483 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR); 484 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR); 485 486 return 0; 487 } 488 489 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io, 490 struct rsnd_dma *dma, 491 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 492 { 493 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 494 struct rsnd_priv *priv = rsnd_io_to_priv(io); 495 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 496 struct device *dev = rsnd_priv_to_dev(priv); 497 498 dmapp->dmapp_id = dmac->dmapp_num; 499 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE; 500 501 dmac->dmapp_num++; 502 503 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n", 504 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr); 505 506 return 0; 507 } 508 509 static struct rsnd_mod_ops rsnd_dmapp_ops = { 510 .name = "audmac-pp", 511 .start = rsnd_dmapp_start, 512 .stop = rsnd_dmapp_stop, 513 .quit = rsnd_dmapp_stop, 514 }; 515 516 /* 517 * Common DMAC Interface 518 */ 519 520 /* 521 * DMA read/write register offset 522 * 523 * RSND_xxx_I_N for Audio DMAC input 524 * RSND_xxx_O_N for Audio DMAC output 525 * RSND_xxx_I_P for Audio DMAC peri peri input 526 * RSND_xxx_O_P for Audio DMAC peri peri output 527 * 528 * ex) R-Car H2 case 529 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out 530 * SSI : 0xec541000 / 0xec241008 / 0xec24100c 531 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000 532 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000 533 * CMD : 0xec500000 / / 0xec008000 0xec308000 534 */ 535 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8) 536 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc) 537 538 #define RDMA_SSIU_I_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i)) 539 #define RDMA_SSIU_O_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i)) 540 541 #define RDMA_SSIU_I_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i)) 542 #define RDMA_SSIU_O_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i)) 543 544 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i)) 545 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i)) 546 547 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i)) 548 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i)) 549 550 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i)) 551 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i)) 552 553 static dma_addr_t 554 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io, 555 struct rsnd_mod *mod, 556 int is_play, int is_from) 557 { 558 struct rsnd_priv *priv = rsnd_io_to_priv(io); 559 struct device *dev = rsnd_priv_to_dev(priv); 560 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI); 561 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU); 562 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod); 563 int use_src = !!rsnd_io_to_mod_src(io); 564 int use_cmd = !!rsnd_io_to_mod_dvc(io) || 565 !!rsnd_io_to_mod_mix(io) || 566 !!rsnd_io_to_mod_ctu(io); 567 int id = rsnd_mod_id(mod); 568 struct dma_addr { 569 dma_addr_t out_addr; 570 dma_addr_t in_addr; 571 } dma_addrs[3][2][3] = { 572 /* SRC */ 573 {{{ 0, 0 }, 574 /* Capture */ 575 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) }, 576 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } }, 577 /* Playback */ 578 {{ 0, 0, }, 579 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) }, 580 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } } 581 }, 582 /* SSI */ 583 /* Capture */ 584 {{{ RDMA_SSI_O_N(ssi, id), 0 }, 585 { RDMA_SSIU_O_P(ssi, id), 0 }, 586 { RDMA_SSIU_O_P(ssi, id), 0 } }, 587 /* Playback */ 588 {{ 0, RDMA_SSI_I_N(ssi, id) }, 589 { 0, RDMA_SSIU_I_P(ssi, id) }, 590 { 0, RDMA_SSIU_I_P(ssi, id) } } 591 }, 592 /* SSIU */ 593 /* Capture */ 594 {{{ RDMA_SSIU_O_N(ssi, id), 0 }, 595 { RDMA_SSIU_O_P(ssi, id), 0 }, 596 { RDMA_SSIU_O_P(ssi, id), 0 } }, 597 /* Playback */ 598 {{ 0, RDMA_SSIU_I_N(ssi, id) }, 599 { 0, RDMA_SSIU_I_P(ssi, id) }, 600 { 0, RDMA_SSIU_I_P(ssi, id) } } }, 601 }; 602 603 /* it shouldn't happen */ 604 if (use_cmd && !use_src) 605 dev_err(dev, "DVC is selected without SRC\n"); 606 607 /* use SSIU or SSI ? */ 608 if (is_ssi && rsnd_ssi_use_busif(io)) 609 is_ssi++; 610 611 return (is_from) ? 612 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr : 613 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr; 614 } 615 616 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io, 617 struct rsnd_mod *mod, 618 int is_play, int is_from) 619 { 620 struct rsnd_priv *priv = rsnd_io_to_priv(io); 621 622 /* 623 * gen1 uses default DMA addr 624 */ 625 if (rsnd_is_gen1(priv)) 626 return 0; 627 628 if (!mod) 629 return 0; 630 631 return rsnd_gen2_dma_addr(io, mod, is_play, is_from); 632 } 633 634 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */ 635 static void rsnd_dma_of_path(struct rsnd_mod *this, 636 struct rsnd_dai_stream *io, 637 int is_play, 638 struct rsnd_mod **mod_from, 639 struct rsnd_mod **mod_to) 640 { 641 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 642 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 643 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io); 644 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io); 645 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 646 struct rsnd_mod *mod[MOD_MAX]; 647 struct rsnd_mod *mod_start, *mod_end; 648 struct rsnd_priv *priv = rsnd_mod_to_priv(this); 649 struct device *dev = rsnd_priv_to_dev(priv); 650 int nr, i, idx; 651 652 if (!ssi) 653 return; 654 655 nr = 0; 656 for (i = 0; i < MOD_MAX; i++) { 657 mod[i] = NULL; 658 nr += !!rsnd_io_to_mod(io, i); 659 } 660 661 /* 662 * [S] -*-> [E] 663 * [S] -*-> SRC -o-> [E] 664 * [S] -*-> SRC -> DVC -o-> [E] 665 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E] 666 * 667 * playback [S] = mem 668 * [E] = SSI 669 * 670 * capture [S] = SSI 671 * [E] = mem 672 * 673 * -*-> Audio DMAC 674 * -o-> Audio DMAC peri peri 675 */ 676 mod_start = (is_play) ? NULL : ssi; 677 mod_end = (is_play) ? ssi : NULL; 678 679 idx = 0; 680 mod[idx++] = mod_start; 681 for (i = 1; i < nr; i++) { 682 if (src) { 683 mod[idx++] = src; 684 src = NULL; 685 } else if (ctu) { 686 mod[idx++] = ctu; 687 ctu = NULL; 688 } else if (mix) { 689 mod[idx++] = mix; 690 mix = NULL; 691 } else if (dvc) { 692 mod[idx++] = dvc; 693 dvc = NULL; 694 } 695 } 696 mod[idx] = mod_end; 697 698 /* 699 * | SSI | SRC | 700 * -------------+-----+-----+ 701 * is_play | o | * | 702 * !is_play | * | o | 703 */ 704 if ((this == ssi) == (is_play)) { 705 *mod_from = mod[idx - 1]; 706 *mod_to = mod[idx]; 707 } else { 708 *mod_from = mod[0]; 709 *mod_to = mod[1]; 710 } 711 712 dev_dbg(dev, "module connection (this is %s[%d])\n", 713 rsnd_mod_name(this), rsnd_mod_id(this)); 714 for (i = 0; i <= idx; i++) { 715 dev_dbg(dev, " %s[%d]%s\n", 716 rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]), 717 (mod[i] == *mod_from) ? " from" : 718 (mod[i] == *mod_to) ? " to" : ""); 719 } 720 } 721 722 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 723 struct rsnd_mod **dma_mod) 724 { 725 struct rsnd_mod *mod_from = NULL; 726 struct rsnd_mod *mod_to = NULL; 727 struct rsnd_priv *priv = rsnd_io_to_priv(io); 728 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 729 struct device *dev = rsnd_priv_to_dev(priv); 730 struct rsnd_mod_ops *ops; 731 enum rsnd_mod_type type; 732 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, 733 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to); 734 int is_play = rsnd_io_is_play(io); 735 int ret, dma_id; 736 737 /* 738 * DMA failed. try to PIO mode 739 * see 740 * rsnd_ssi_fallback() 741 * rsnd_rdai_continuance_probe() 742 */ 743 if (!dmac) 744 return -EAGAIN; 745 746 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to); 747 748 /* for Gen2 */ 749 if (mod_from && mod_to) { 750 ops = &rsnd_dmapp_ops; 751 attach = rsnd_dmapp_attach; 752 dma_id = dmac->dmapp_num; 753 type = RSND_MOD_AUDMAPP; 754 } else { 755 ops = &rsnd_dmaen_ops; 756 attach = rsnd_dmaen_attach; 757 dma_id = dmac->dmaen_num; 758 type = RSND_MOD_AUDMA; 759 } 760 761 /* for Gen1, overwrite */ 762 if (rsnd_is_gen1(priv)) { 763 ops = &rsnd_dmaen_ops; 764 attach = rsnd_dmaen_attach; 765 dma_id = dmac->dmaen_num; 766 type = RSND_MOD_AUDMA; 767 } 768 769 if (!(*dma_mod)) { 770 struct rsnd_dma *dma; 771 772 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); 773 if (!dma) 774 return -ENOMEM; 775 776 *dma_mod = rsnd_mod_get(dma); 777 778 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL, 779 rsnd_mod_get_status, type, dma_id); 780 if (ret < 0) 781 return ret; 782 783 dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n", 784 rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod), 785 rsnd_mod_name(mod_from), rsnd_mod_id(mod_from), 786 rsnd_mod_name(mod_to), rsnd_mod_id(mod_to)); 787 788 ret = attach(io, dma, mod_from, mod_to); 789 if (ret < 0) 790 return ret; 791 792 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1); 793 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0); 794 dma->mod_from = mod_from; 795 dma->mod_to = mod_to; 796 } 797 798 ret = rsnd_dai_connect(*dma_mod, io, type); 799 if (ret < 0) 800 return ret; 801 802 return 0; 803 } 804 805 int rsnd_dma_probe(struct rsnd_priv *priv) 806 { 807 struct platform_device *pdev = rsnd_priv_to_pdev(priv); 808 struct device *dev = rsnd_priv_to_dev(priv); 809 struct rsnd_dma_ctrl *dmac; 810 struct resource *res; 811 812 /* 813 * for Gen1 814 */ 815 if (rsnd_is_gen1(priv)) 816 return 0; 817 818 /* 819 * for Gen2 820 */ 821 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp"); 822 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); 823 if (!dmac || !res) { 824 dev_err(dev, "dma allocate failed\n"); 825 return 0; /* it will be PIO mode */ 826 } 827 828 dmac->dmapp_num = 0; 829 dmac->base = devm_ioremap_resource(dev, res); 830 if (IS_ERR(dmac->base)) 831 return PTR_ERR(dmac->base); 832 833 priv->dma = dmac; 834 835 return 0; 836 } 837