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 void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg) 458 { 459 struct rsnd_mod *mod = rsnd_mod_get(dma); 460 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 461 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 462 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg); 463 u32 val = ioread32(addr); 464 465 val &= ~mask; 466 val |= (data & mask); 467 468 iowrite32(val, addr); 469 } 470 471 static int rsnd_dmapp_stop(struct rsnd_mod *mod, 472 struct rsnd_dai_stream *io, 473 struct rsnd_priv *priv) 474 { 475 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 476 int i; 477 478 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR); 479 480 for (i = 0; i < 1024; i++) { 481 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE)) 482 return 0; 483 udelay(1); 484 } 485 486 return -EIO; 487 } 488 489 static int rsnd_dmapp_start(struct rsnd_mod *mod, 490 struct rsnd_dai_stream *io, 491 struct rsnd_priv *priv) 492 { 493 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 494 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 495 496 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR); 497 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR); 498 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR); 499 500 return 0; 501 } 502 503 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io, 504 struct rsnd_dma *dma, 505 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 506 { 507 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 508 struct rsnd_priv *priv = rsnd_io_to_priv(io); 509 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 510 struct device *dev = rsnd_priv_to_dev(priv); 511 512 dmapp->dmapp_id = dmac->dmapp_num; 513 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE; 514 515 dmac->dmapp_num++; 516 517 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n", 518 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr); 519 520 return 0; 521 } 522 523 static struct rsnd_mod_ops rsnd_dmapp_ops = { 524 .name = "audmac-pp", 525 .start = rsnd_dmapp_start, 526 .stop = rsnd_dmapp_stop, 527 .quit = rsnd_dmapp_stop, 528 }; 529 530 /* 531 * Common DMAC Interface 532 */ 533 534 /* 535 * DMA read/write register offset 536 * 537 * RSND_xxx_I_N for Audio DMAC input 538 * RSND_xxx_O_N for Audio DMAC output 539 * RSND_xxx_I_P for Audio DMAC peri peri input 540 * RSND_xxx_O_P for Audio DMAC peri peri output 541 * 542 * ex) R-Car H2 case 543 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out 544 * SSI : 0xec541000 / 0xec241008 / 0xec24100c 545 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000 546 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000 547 * CMD : 0xec500000 / / 0xec008000 0xec308000 548 */ 549 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8) 550 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc) 551 552 #define RDMA_SSIU_I_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i)) 553 #define RDMA_SSIU_O_N(addr, i) (addr ##_reg - 0x00441000 + (0x1000 * i)) 554 555 #define RDMA_SSIU_I_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i)) 556 #define RDMA_SSIU_O_P(addr, i) (addr ##_reg - 0x00141000 + (0x1000 * i)) 557 558 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i)) 559 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i)) 560 561 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i)) 562 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i)) 563 564 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i)) 565 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i)) 566 567 static dma_addr_t 568 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io, 569 struct rsnd_mod *mod, 570 int is_play, int is_from) 571 { 572 struct rsnd_priv *priv = rsnd_io_to_priv(io); 573 struct device *dev = rsnd_priv_to_dev(priv); 574 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI); 575 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU); 576 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod); 577 int use_src = !!rsnd_io_to_mod_src(io); 578 int use_cmd = !!rsnd_io_to_mod_dvc(io) || 579 !!rsnd_io_to_mod_mix(io) || 580 !!rsnd_io_to_mod_ctu(io); 581 int id = rsnd_mod_id(mod); 582 struct dma_addr { 583 dma_addr_t out_addr; 584 dma_addr_t in_addr; 585 } dma_addrs[3][2][3] = { 586 /* SRC */ 587 {{{ 0, 0 }, 588 /* Capture */ 589 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) }, 590 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } }, 591 /* Playback */ 592 {{ 0, 0, }, 593 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) }, 594 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } } 595 }, 596 /* SSI */ 597 /* Capture */ 598 {{{ RDMA_SSI_O_N(ssi, id), 0 }, 599 { RDMA_SSIU_O_P(ssi, id), 0 }, 600 { RDMA_SSIU_O_P(ssi, id), 0 } }, 601 /* Playback */ 602 {{ 0, RDMA_SSI_I_N(ssi, id) }, 603 { 0, RDMA_SSIU_I_P(ssi, id) }, 604 { 0, RDMA_SSIU_I_P(ssi, id) } } 605 }, 606 /* SSIU */ 607 /* Capture */ 608 {{{ RDMA_SSIU_O_N(ssi, id), 0 }, 609 { RDMA_SSIU_O_P(ssi, id), 0 }, 610 { RDMA_SSIU_O_P(ssi, id), 0 } }, 611 /* Playback */ 612 {{ 0, RDMA_SSIU_I_N(ssi, id) }, 613 { 0, RDMA_SSIU_I_P(ssi, id) }, 614 { 0, RDMA_SSIU_I_P(ssi, id) } } }, 615 }; 616 617 /* it shouldn't happen */ 618 if (use_cmd && !use_src) 619 dev_err(dev, "DVC is selected without SRC\n"); 620 621 /* use SSIU or SSI ? */ 622 if (is_ssi && rsnd_ssi_use_busif(io)) 623 is_ssi++; 624 625 return (is_from) ? 626 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr : 627 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr; 628 } 629 630 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io, 631 struct rsnd_mod *mod, 632 int is_play, int is_from) 633 { 634 struct rsnd_priv *priv = rsnd_io_to_priv(io); 635 636 /* 637 * gen1 uses default DMA addr 638 */ 639 if (rsnd_is_gen1(priv)) 640 return 0; 641 642 if (!mod) 643 return 0; 644 645 return rsnd_gen2_dma_addr(io, mod, is_play, is_from); 646 } 647 648 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */ 649 static void rsnd_dma_of_path(struct rsnd_mod *this, 650 struct rsnd_dai_stream *io, 651 int is_play, 652 struct rsnd_mod **mod_from, 653 struct rsnd_mod **mod_to) 654 { 655 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 656 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 657 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io); 658 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io); 659 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 660 struct rsnd_mod *mod[MOD_MAX]; 661 struct rsnd_mod *mod_start, *mod_end; 662 struct rsnd_priv *priv = rsnd_mod_to_priv(this); 663 struct device *dev = rsnd_priv_to_dev(priv); 664 int nr, i, idx; 665 666 if (!ssi) 667 return; 668 669 nr = 0; 670 for (i = 0; i < MOD_MAX; i++) { 671 mod[i] = NULL; 672 nr += !!rsnd_io_to_mod(io, i); 673 } 674 675 /* 676 * [S] -*-> [E] 677 * [S] -*-> SRC -o-> [E] 678 * [S] -*-> SRC -> DVC -o-> [E] 679 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E] 680 * 681 * playback [S] = mem 682 * [E] = SSI 683 * 684 * capture [S] = SSI 685 * [E] = mem 686 * 687 * -*-> Audio DMAC 688 * -o-> Audio DMAC peri peri 689 */ 690 mod_start = (is_play) ? NULL : ssi; 691 mod_end = (is_play) ? ssi : NULL; 692 693 idx = 0; 694 mod[idx++] = mod_start; 695 for (i = 1; i < nr; i++) { 696 if (src) { 697 mod[idx++] = src; 698 src = NULL; 699 } else if (ctu) { 700 mod[idx++] = ctu; 701 ctu = NULL; 702 } else if (mix) { 703 mod[idx++] = mix; 704 mix = NULL; 705 } else if (dvc) { 706 mod[idx++] = dvc; 707 dvc = NULL; 708 } 709 } 710 mod[idx] = mod_end; 711 712 /* 713 * | SSI | SRC | 714 * -------------+-----+-----+ 715 * is_play | o | * | 716 * !is_play | * | o | 717 */ 718 if ((this == ssi) == (is_play)) { 719 *mod_from = mod[idx - 1]; 720 *mod_to = mod[idx]; 721 } else { 722 *mod_from = mod[0]; 723 *mod_to = mod[1]; 724 } 725 726 dev_dbg(dev, "module connection (this is %s[%d])\n", 727 rsnd_mod_name(this), rsnd_mod_id(this)); 728 for (i = 0; i <= idx; i++) { 729 dev_dbg(dev, " %s[%d]%s\n", 730 rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]), 731 (mod[i] == *mod_from) ? " from" : 732 (mod[i] == *mod_to) ? " to" : ""); 733 } 734 } 735 736 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 737 struct rsnd_mod **dma_mod) 738 { 739 struct rsnd_mod *mod_from = NULL; 740 struct rsnd_mod *mod_to = NULL; 741 struct rsnd_priv *priv = rsnd_io_to_priv(io); 742 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 743 struct device *dev = rsnd_priv_to_dev(priv); 744 struct rsnd_mod_ops *ops; 745 enum rsnd_mod_type type; 746 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, 747 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to); 748 int is_play = rsnd_io_is_play(io); 749 int ret, dma_id; 750 751 /* 752 * DMA failed. try to PIO mode 753 * see 754 * rsnd_ssi_fallback() 755 * rsnd_rdai_continuance_probe() 756 */ 757 if (!dmac) 758 return -EAGAIN; 759 760 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to); 761 762 /* for Gen2 */ 763 if (mod_from && mod_to) { 764 ops = &rsnd_dmapp_ops; 765 attach = rsnd_dmapp_attach; 766 dma_id = dmac->dmapp_num; 767 type = RSND_MOD_AUDMAPP; 768 } else { 769 ops = &rsnd_dmaen_ops; 770 attach = rsnd_dmaen_attach; 771 dma_id = dmac->dmaen_num; 772 type = RSND_MOD_AUDMA; 773 } 774 775 /* for Gen1, overwrite */ 776 if (rsnd_is_gen1(priv)) { 777 ops = &rsnd_dmaen_ops; 778 attach = rsnd_dmaen_attach; 779 dma_id = dmac->dmaen_num; 780 type = RSND_MOD_AUDMA; 781 } 782 783 if (!(*dma_mod)) { 784 struct rsnd_dma *dma; 785 786 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); 787 if (!dma) 788 return -ENOMEM; 789 790 *dma_mod = rsnd_mod_get(dma); 791 792 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL, 793 rsnd_mod_get_status, type, dma_id); 794 if (ret < 0) 795 return ret; 796 797 dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n", 798 rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod), 799 rsnd_mod_name(mod_from), rsnd_mod_id(mod_from), 800 rsnd_mod_name(mod_to), rsnd_mod_id(mod_to)); 801 802 ret = attach(io, dma, mod_from, mod_to); 803 if (ret < 0) 804 return ret; 805 806 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1); 807 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0); 808 dma->mod_from = mod_from; 809 dma->mod_to = mod_to; 810 } 811 812 ret = rsnd_dai_connect(*dma_mod, io, type); 813 if (ret < 0) 814 return ret; 815 816 return 0; 817 } 818 819 int rsnd_dma_probe(struct rsnd_priv *priv) 820 { 821 struct platform_device *pdev = rsnd_priv_to_pdev(priv); 822 struct device *dev = rsnd_priv_to_dev(priv); 823 struct rsnd_dma_ctrl *dmac; 824 struct resource *res; 825 826 /* 827 * for Gen1 828 */ 829 if (rsnd_is_gen1(priv)) 830 return 0; 831 832 /* 833 * for Gen2 834 */ 835 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp"); 836 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); 837 if (!dmac || !res) { 838 dev_err(dev, "dma allocate failed\n"); 839 return 0; /* it will be PIO mode */ 840 } 841 842 dmac->dmapp_num = 0; 843 dmac->base = devm_ioremap_resource(dev, res); 844 if (IS_ERR(dmac->base)) 845 return PTR_ERR(dmac->base); 846 847 priv->dma = dmac; 848 849 return 0; 850 } 851