1// SPDX-License-Identifier: GPL-2.0 2// 3// Renesas R-Car Audio DMAC support 4// 5// Copyright (C) 2015 Renesas Electronics Corp. 6// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 8#include <linux/delay.h> 9#include <linux/of_dma.h> 10#include "rsnd.h" 11 12/* 13 * Audio DMAC peri peri register 14 */ 15#define PDMASAR 0x00 16#define PDMADAR 0x04 17#define PDMACHCR 0x0c 18 19/* PDMACHCR */ 20#define PDMACHCR_DE (1 << 0) 21 22 23struct rsnd_dmaen { 24 struct dma_chan *chan; 25 dma_cookie_t cookie; 26 unsigned int dma_len; 27}; 28 29struct rsnd_dmapp { 30 int dmapp_id; 31 u32 chcr; 32}; 33 34struct rsnd_dma { 35 struct rsnd_mod mod; 36 struct rsnd_mod *mod_from; 37 struct rsnd_mod *mod_to; 38 dma_addr_t src_addr; 39 dma_addr_t dst_addr; 40 union { 41 struct rsnd_dmaen en; 42 struct rsnd_dmapp pp; 43 } dma; 44}; 45 46struct rsnd_dma_ctrl { 47 void __iomem *base; 48 int dmaen_num; 49 int dmapp_num; 50}; 51 52#define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma) 53#define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod) 54#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en) 55#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp) 56 57/* for DEBUG */ 58static struct rsnd_mod_ops mem_ops = { 59 .name = "mem", 60}; 61 62static struct rsnd_mod mem = { 63}; 64 65/* 66 * Audio DMAC 67 */ 68static void __rsnd_dmaen_complete(struct rsnd_mod *mod, 69 struct rsnd_dai_stream *io) 70{ 71 if (rsnd_io_is_working(io)) 72 rsnd_dai_period_elapsed(io); 73} 74 75static void rsnd_dmaen_complete(void *data) 76{ 77 struct rsnd_mod *mod = data; 78 79 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete); 80} 81 82static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io, 83 struct rsnd_mod *mod_from, 84 struct rsnd_mod *mod_to) 85{ 86 if ((!mod_from && !mod_to) || 87 (mod_from && mod_to)) 88 return NULL; 89 90 if (mod_from) 91 return rsnd_mod_dma_req(io, mod_from); 92 else 93 return rsnd_mod_dma_req(io, mod_to); 94} 95 96static int rsnd_dmaen_stop(struct rsnd_mod *mod, 97 struct rsnd_dai_stream *io, 98 struct rsnd_priv *priv) 99{ 100 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 101 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 102 103 if (dmaen->chan) 104 dmaengine_terminate_all(dmaen->chan); 105 106 return 0; 107} 108 109static int rsnd_dmaen_cleanup(struct rsnd_mod *mod, 110 struct rsnd_dai_stream *io, 111 struct rsnd_priv *priv) 112{ 113 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 114 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 115 116 /* 117 * DMAEngine release uses mutex lock. 118 * Thus, it shouldn't be called under spinlock. 119 * Let's call it under prepare 120 */ 121 if (dmaen->chan) 122 dma_release_channel(dmaen->chan); 123 124 dmaen->chan = NULL; 125 126 return 0; 127} 128 129static int rsnd_dmaen_prepare(struct rsnd_mod *mod, 130 struct rsnd_dai_stream *io, 131 struct rsnd_priv *priv) 132{ 133 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 134 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 135 struct device *dev = rsnd_priv_to_dev(priv); 136 137 /* maybe suspended */ 138 if (dmaen->chan) 139 return 0; 140 141 /* 142 * DMAEngine request uses mutex lock. 143 * Thus, it shouldn't be called under spinlock. 144 * Let's call it under prepare 145 */ 146 dmaen->chan = rsnd_dmaen_request_channel(io, 147 dma->mod_from, 148 dma->mod_to); 149 if (IS_ERR_OR_NULL(dmaen->chan)) { 150 dmaen->chan = NULL; 151 dev_err(dev, "can't get dma channel\n"); 152 return -EIO; 153 } 154 155 return 0; 156} 157 158static int rsnd_dmaen_start(struct rsnd_mod *mod, 159 struct rsnd_dai_stream *io, 160 struct rsnd_priv *priv) 161{ 162 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 163 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 164 struct snd_pcm_substream *substream = io->substream; 165 struct device *dev = rsnd_priv_to_dev(priv); 166 struct dma_async_tx_descriptor *desc; 167 struct dma_slave_config cfg = {}; 168 enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; 169 int is_play = rsnd_io_is_play(io); 170 int ret; 171 172 /* 173 * in case of monaural data writing or reading through Audio-DMAC 174 * data is always in Left Justified format, so both src and dst 175 * DMA Bus width need to be set equal to physical data width. 176 */ 177 if (rsnd_runtime_channel_original(io) == 1) { 178 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 179 int bits = snd_pcm_format_physical_width(runtime->format); 180 181 switch (bits) { 182 case 8: 183 buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; 184 break; 185 case 16: 186 buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; 187 break; 188 case 32: 189 buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; 190 break; 191 default: 192 dev_err(dev, "invalid format width %d\n", bits); 193 return -EINVAL; 194 } 195 } 196 197 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 198 cfg.src_addr = dma->src_addr; 199 cfg.dst_addr = dma->dst_addr; 200 cfg.src_addr_width = buswidth; 201 cfg.dst_addr_width = buswidth; 202 203 dev_dbg(dev, "%s %pad -> %pad\n", 204 rsnd_mod_name(mod), 205 &cfg.src_addr, &cfg.dst_addr); 206 207 ret = dmaengine_slave_config(dmaen->chan, &cfg); 208 if (ret < 0) 209 return ret; 210 211 desc = dmaengine_prep_dma_cyclic(dmaen->chan, 212 substream->runtime->dma_addr, 213 snd_pcm_lib_buffer_bytes(substream), 214 snd_pcm_lib_period_bytes(substream), 215 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, 216 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 217 218 if (!desc) { 219 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 220 return -EIO; 221 } 222 223 desc->callback = rsnd_dmaen_complete; 224 desc->callback_param = rsnd_mod_get(dma); 225 226 dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream); 227 228 dmaen->cookie = dmaengine_submit(desc); 229 if (dmaen->cookie < 0) { 230 dev_err(dev, "dmaengine_submit() fail\n"); 231 return -EIO; 232 } 233 234 dma_async_issue_pending(dmaen->chan); 235 236 return 0; 237} 238 239struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node, 240 struct rsnd_mod *mod, char *name) 241{ 242 struct dma_chan *chan = NULL; 243 struct device_node *np; 244 int i = 0; 245 246 for_each_child_of_node(of_node, np) { 247 if (i == rsnd_mod_id_raw(mod) && (!chan)) 248 chan = of_dma_request_slave_channel(np, name); 249 i++; 250 } 251 252 /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */ 253 of_node_put(of_node); 254 255 return chan; 256} 257 258static int rsnd_dmaen_attach(struct rsnd_dai_stream *io, 259 struct rsnd_dma *dma, 260 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 261{ 262 struct rsnd_priv *priv = rsnd_io_to_priv(io); 263 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 264 struct dma_chan *chan; 265 266 /* try to get DMAEngine channel */ 267 chan = rsnd_dmaen_request_channel(io, mod_from, mod_to); 268 if (IS_ERR_OR_NULL(chan)) { 269 /* Let's follow when -EPROBE_DEFER case */ 270 if (PTR_ERR(chan) == -EPROBE_DEFER) 271 return PTR_ERR(chan); 272 273 /* 274 * DMA failed. try to PIO mode 275 * see 276 * rsnd_ssi_fallback() 277 * rsnd_rdai_continuance_probe() 278 */ 279 return -EAGAIN; 280 } 281 282 /* 283 * use it for IPMMU if needed 284 * see 285 * rsnd_preallocate_pages() 286 */ 287 io->dmac_dev = chan->device->dev; 288 289 dma_release_channel(chan); 290 291 dmac->dmaen_num++; 292 293 return 0; 294} 295 296static int rsnd_dmaen_pointer(struct rsnd_mod *mod, 297 struct rsnd_dai_stream *io, 298 snd_pcm_uframes_t *pointer) 299{ 300 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 301 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 302 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 303 struct dma_tx_state state; 304 enum dma_status status; 305 unsigned int pos = 0; 306 307 status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state); 308 if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) { 309 if (state.residue > 0 && state.residue <= dmaen->dma_len) 310 pos = dmaen->dma_len - state.residue; 311 } 312 *pointer = bytes_to_frames(runtime, pos); 313 314 return 0; 315} 316 317static struct rsnd_mod_ops rsnd_dmaen_ops = { 318 .name = "audmac", 319 .prepare = rsnd_dmaen_prepare, 320 .cleanup = rsnd_dmaen_cleanup, 321 .start = rsnd_dmaen_start, 322 .stop = rsnd_dmaen_stop, 323 .pointer = rsnd_dmaen_pointer, 324 .get_status = rsnd_mod_get_status, 325}; 326 327/* 328 * Audio DMAC peri peri 329 */ 330static const u8 gen2_id_table_ssiu[] = { 331 /* SSI00 ~ SSI07 */ 332 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c, 333 /* SSI10 ~ SSI17 */ 334 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40, 335 /* SSI20 ~ SSI27 */ 336 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44, 337 /* SSI30 ~ SSI37 */ 338 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 339 /* SSI40 ~ SSI47 */ 340 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 341 /* SSI5 */ 342 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 343 /* SSI6 */ 344 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 345 /* SSI7 */ 346 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 347 /* SSI8 */ 348 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 349 /* SSI90 ~ SSI97 */ 350 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56, 351}; 352static const u8 gen2_id_table_scu[] = { 353 0x2d, /* SCU_SRCI0 */ 354 0x2e, /* SCU_SRCI1 */ 355 0x2f, /* SCU_SRCI2 */ 356 0x30, /* SCU_SRCI3 */ 357 0x31, /* SCU_SRCI4 */ 358 0x32, /* SCU_SRCI5 */ 359 0x33, /* SCU_SRCI6 */ 360 0x34, /* SCU_SRCI7 */ 361 0x35, /* SCU_SRCI8 */ 362 0x36, /* SCU_SRCI9 */ 363}; 364static const u8 gen2_id_table_cmd[] = { 365 0x37, /* SCU_CMD0 */ 366 0x38, /* SCU_CMD1 */ 367}; 368 369static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io, 370 struct rsnd_mod *mod) 371{ 372 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 373 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io); 374 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 375 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 376 const u8 *entry = NULL; 377 int id = 255; 378 int size = 0; 379 380 if ((mod == ssi) || 381 (mod == ssiu)) { 382 int busif = rsnd_mod_id_sub(ssiu); 383 384 entry = gen2_id_table_ssiu; 385 size = ARRAY_SIZE(gen2_id_table_ssiu); 386 id = (rsnd_mod_id(mod) * 8) + busif; 387 } else if (mod == src) { 388 entry = gen2_id_table_scu; 389 size = ARRAY_SIZE(gen2_id_table_scu); 390 id = rsnd_mod_id(mod); 391 } else if (mod == dvc) { 392 entry = gen2_id_table_cmd; 393 size = ARRAY_SIZE(gen2_id_table_cmd); 394 id = rsnd_mod_id(mod); 395 } 396 397 if ((!entry) || (size <= id)) { 398 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io)); 399 400 dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod)); 401 402 /* use non-prohibited SRS number as error */ 403 return 0x00; /* SSI00 */ 404 } 405 406 return entry[id]; 407} 408 409static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io, 410 struct rsnd_mod *mod_from, 411 struct rsnd_mod *mod_to) 412{ 413 return (rsnd_dmapp_get_id(io, mod_from) << 24) + 414 (rsnd_dmapp_get_id(io, mod_to) << 16); 415} 416 417#define rsnd_dmapp_addr(dmac, dma, reg) \ 418 (dmac->base + 0x20 + reg + \ 419 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id)) 420static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg) 421{ 422 struct rsnd_mod *mod = rsnd_mod_get(dma); 423 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 424 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 425 struct device *dev = rsnd_priv_to_dev(priv); 426 427 dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data); 428 429 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg)); 430} 431 432static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg) 433{ 434 struct rsnd_mod *mod = rsnd_mod_get(dma); 435 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 436 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 437 438 return ioread32(rsnd_dmapp_addr(dmac, dma, reg)); 439} 440 441static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg) 442{ 443 struct rsnd_mod *mod = rsnd_mod_get(dma); 444 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 445 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 446 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg); 447 u32 val = ioread32(addr); 448 449 val &= ~mask; 450 val |= (data & mask); 451 452 iowrite32(val, addr); 453} 454 455static int rsnd_dmapp_stop(struct rsnd_mod *mod, 456 struct rsnd_dai_stream *io, 457 struct rsnd_priv *priv) 458{ 459 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 460 int i; 461 462 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR); 463 464 for (i = 0; i < 1024; i++) { 465 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE)) 466 return 0; 467 udelay(1); 468 } 469 470 return -EIO; 471} 472 473static int rsnd_dmapp_start(struct rsnd_mod *mod, 474 struct rsnd_dai_stream *io, 475 struct rsnd_priv *priv) 476{ 477 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 478 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 479 480 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR); 481 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR); 482 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR); 483 484 return 0; 485} 486 487static int rsnd_dmapp_attach(struct rsnd_dai_stream *io, 488 struct rsnd_dma *dma, 489 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 490{ 491 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 492 struct rsnd_priv *priv = rsnd_io_to_priv(io); 493 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 494 struct device *dev = rsnd_priv_to_dev(priv); 495 496 dmapp->dmapp_id = dmac->dmapp_num; 497 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE; 498 499 dmac->dmapp_num++; 500 501 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n", 502 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr); 503 504 return 0; 505} 506 507static struct rsnd_mod_ops rsnd_dmapp_ops = { 508 .name = "audmac-pp", 509 .start = rsnd_dmapp_start, 510 .stop = rsnd_dmapp_stop, 511 .quit = rsnd_dmapp_stop, 512 .get_status = rsnd_mod_get_status, 513}; 514 515/* 516 * Common DMAC Interface 517 */ 518 519/* 520 * DMA read/write register offset 521 * 522 * RSND_xxx_I_N for Audio DMAC input 523 * RSND_xxx_O_N for Audio DMAC output 524 * RSND_xxx_I_P for Audio DMAC peri peri input 525 * RSND_xxx_O_P for Audio DMAC peri peri output 526 * 527 * ex) R-Car H2 case 528 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out 529 * SSI : 0xec541000 / 0xec241008 / 0xec24100c 530 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000 531 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000 532 * CMD : 0xec500000 / / 0xec008000 0xec308000 533 */ 534#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8) 535#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc) 536 537#define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4))) 538#define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j) 539 540#define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4))) 541#define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j) 542 543#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i)) 544#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i)) 545 546#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i)) 547#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i)) 548 549#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i)) 550#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i)) 551 552static dma_addr_t 553rsnd_gen2_dma_addr(struct rsnd_dai_stream *io, 554 struct rsnd_mod *mod, 555 int is_play, int is_from) 556{ 557 struct rsnd_priv *priv = rsnd_io_to_priv(io); 558 struct device *dev = rsnd_priv_to_dev(priv); 559 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI); 560 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU); 561 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) || 562 !!(rsnd_io_to_mod_ssiu(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 int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io)); 569 struct dma_addr { 570 dma_addr_t out_addr; 571 dma_addr_t in_addr; 572 } dma_addrs[3][2][3] = { 573 /* SRC */ 574 /* Capture */ 575 {{{ 0, 0 }, 576 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) }, 577 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } }, 578 /* Playback */ 579 {{ 0, 0, }, 580 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) }, 581 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } } 582 }, 583 /* SSI */ 584 /* Capture */ 585 {{{ RDMA_SSI_O_N(ssi, id), 0 }, 586 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 587 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 588 /* Playback */ 589 {{ 0, RDMA_SSI_I_N(ssi, id) }, 590 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 591 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } 592 }, 593 /* SSIU */ 594 /* Capture */ 595 {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 }, 596 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 597 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 598 /* Playback */ 599 {{ 0, RDMA_SSIU_I_N(ssi, id, busif) }, 600 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 601 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } }, 602 }; 603 604 /* 605 * FIXME 606 * 607 * We can't support SSI9-4/5/6/7, because its address is 608 * out of calculation rule 609 */ 610 if ((id == 9) && (busif >= 4)) 611 dev_err(dev, "This driver doesn't support SSI%d-%d, so far", 612 id, busif); 613 614 /* it shouldn't happen */ 615 if (use_cmd && !use_src) 616 dev_err(dev, "DVC is selected without SRC\n"); 617 618 /* use SSIU or SSI ? */ 619 if (is_ssi && rsnd_ssi_use_busif(io)) 620 is_ssi++; 621 622 return (is_from) ? 623 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr : 624 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr; 625} 626 627static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io, 628 struct rsnd_mod *mod, 629 int is_play, int is_from) 630{ 631 struct rsnd_priv *priv = rsnd_io_to_priv(io); 632 633 /* 634 * gen1 uses default DMA addr 635 */ 636 if (rsnd_is_gen1(priv)) 637 return 0; 638 639 if (!mod) 640 return 0; 641 642 return rsnd_gen2_dma_addr(io, mod, is_play, is_from); 643} 644 645#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */ 646static void rsnd_dma_of_path(struct rsnd_mod *this, 647 struct rsnd_dai_stream *io, 648 int is_play, 649 struct rsnd_mod **mod_from, 650 struct rsnd_mod **mod_to) 651{ 652 struct rsnd_mod *ssi; 653 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 654 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io); 655 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io); 656 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 657 struct rsnd_mod *mod[MOD_MAX]; 658 struct rsnd_mod *mod_start, *mod_end; 659 struct rsnd_priv *priv = rsnd_mod_to_priv(this); 660 struct device *dev = rsnd_priv_to_dev(priv); 661 int nr, i, idx; 662 663 /* 664 * It should use "rcar_sound,ssiu" on DT. 665 * But, we need to keep compatibility for old version. 666 * 667 * If it has "rcar_sound.ssiu", it will be used. 668 * If not, "rcar_sound.ssi" will be used. 669 * see 670 * rsnd_ssiu_dma_req() 671 * rsnd_ssi_dma_req() 672 */ 673 if (rsnd_ssiu_of_node(priv)) { 674 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io); 675 676 /* use SSIU */ 677 ssi = ssiu; 678 if (this == rsnd_io_to_mod_ssi(io)) 679 this = ssiu; 680 } else { 681 /* keep compatible, use SSI */ 682 ssi = rsnd_io_to_mod_ssi(io); 683 } 684 685 if (!ssi) 686 return; 687 688 nr = 0; 689 for (i = 0; i < MOD_MAX; i++) { 690 mod[i] = NULL; 691 nr += !!rsnd_io_to_mod(io, i); 692 } 693 694 /* 695 * [S] -*-> [E] 696 * [S] -*-> SRC -o-> [E] 697 * [S] -*-> SRC -> DVC -o-> [E] 698 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E] 699 * 700 * playback [S] = mem 701 * [E] = SSI 702 * 703 * capture [S] = SSI 704 * [E] = mem 705 * 706 * -*-> Audio DMAC 707 * -o-> Audio DMAC peri peri 708 */ 709 mod_start = (is_play) ? NULL : ssi; 710 mod_end = (is_play) ? ssi : NULL; 711 712 idx = 0; 713 mod[idx++] = mod_start; 714 for (i = 1; i < nr; i++) { 715 if (src) { 716 mod[idx++] = src; 717 src = NULL; 718 } else if (ctu) { 719 mod[idx++] = ctu; 720 ctu = NULL; 721 } else if (mix) { 722 mod[idx++] = mix; 723 mix = NULL; 724 } else if (dvc) { 725 mod[idx++] = dvc; 726 dvc = NULL; 727 } 728 } 729 mod[idx] = mod_end; 730 731 /* 732 * | SSI | SRC | 733 * -------------+-----+-----+ 734 * is_play | o | * | 735 * !is_play | * | o | 736 */ 737 if ((this == ssi) == (is_play)) { 738 *mod_from = mod[idx - 1]; 739 *mod_to = mod[idx]; 740 } else { 741 *mod_from = mod[0]; 742 *mod_to = mod[1]; 743 } 744 745 dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this)); 746 for (i = 0; i <= idx; i++) { 747 dev_dbg(dev, " %s%s\n", 748 rsnd_mod_name(mod[i] ? mod[i] : &mem), 749 (mod[i] == *mod_from) ? " from" : 750 (mod[i] == *mod_to) ? " to" : ""); 751 } 752} 753 754static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 755 struct rsnd_mod **dma_mod) 756{ 757 struct rsnd_mod *mod_from = NULL; 758 struct rsnd_mod *mod_to = NULL; 759 struct rsnd_priv *priv = rsnd_io_to_priv(io); 760 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 761 struct device *dev = rsnd_priv_to_dev(priv); 762 struct rsnd_dma *dma; 763 struct rsnd_mod_ops *ops; 764 enum rsnd_mod_type type; 765 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, 766 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to); 767 int is_play = rsnd_io_is_play(io); 768 int ret, dma_id; 769 770 /* 771 * DMA failed. try to PIO mode 772 * see 773 * rsnd_ssi_fallback() 774 * rsnd_rdai_continuance_probe() 775 */ 776 if (!dmac) 777 return -EAGAIN; 778 779 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to); 780 781 /* for Gen2 or later */ 782 if (mod_from && mod_to) { 783 ops = &rsnd_dmapp_ops; 784 attach = rsnd_dmapp_attach; 785 dma_id = dmac->dmapp_num; 786 type = RSND_MOD_AUDMAPP; 787 } else { 788 ops = &rsnd_dmaen_ops; 789 attach = rsnd_dmaen_attach; 790 dma_id = dmac->dmaen_num; 791 type = RSND_MOD_AUDMA; 792 } 793 794 /* for Gen1, overwrite */ 795 if (rsnd_is_gen1(priv)) { 796 ops = &rsnd_dmaen_ops; 797 attach = rsnd_dmaen_attach; 798 dma_id = dmac->dmaen_num; 799 type = RSND_MOD_AUDMA; 800 } 801 802 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); 803 if (!dma) 804 return -ENOMEM; 805 806 *dma_mod = rsnd_mod_get(dma); 807 808 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL, 809 type, dma_id); 810 if (ret < 0) 811 return ret; 812 813 dev_dbg(dev, "%s %s -> %s\n", 814 rsnd_mod_name(*dma_mod), 815 rsnd_mod_name(mod_from ? mod_from : &mem), 816 rsnd_mod_name(mod_to ? mod_to : &mem)); 817 818 ret = attach(io, dma, mod_from, mod_to); 819 if (ret < 0) 820 return ret; 821 822 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1); 823 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0); 824 dma->mod_from = mod_from; 825 dma->mod_to = mod_to; 826 827 return 0; 828} 829 830int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 831 struct rsnd_mod **dma_mod) 832{ 833 if (!(*dma_mod)) { 834 int ret = rsnd_dma_alloc(io, mod, dma_mod); 835 836 if (ret < 0) 837 return ret; 838 } 839 840 return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type); 841} 842 843int rsnd_dma_probe(struct rsnd_priv *priv) 844{ 845 struct platform_device *pdev = rsnd_priv_to_pdev(priv); 846 struct device *dev = rsnd_priv_to_dev(priv); 847 struct rsnd_dma_ctrl *dmac; 848 struct resource *res; 849 850 /* 851 * for Gen1 852 */ 853 if (rsnd_is_gen1(priv)) 854 return 0; 855 856 /* 857 * for Gen2 or later 858 */ 859 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp"); 860 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); 861 if (!dmac || !res) { 862 dev_err(dev, "dma allocate failed\n"); 863 return 0; /* it will be PIO mode */ 864 } 865 866 dmac->dmapp_num = 0; 867 dmac->base = devm_ioremap_resource(dev, res); 868 if (IS_ERR(dmac->base)) 869 return PTR_ERR(dmac->base); 870 871 priv->dma = dmac; 872 873 /* dummy mem mod for debug */ 874 return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0); 875} 876