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 23 struct rsnd_dmaen { 24 struct dma_chan *chan; 25 dma_cookie_t cookie; 26 unsigned int dma_len; 27 }; 28 29 struct rsnd_dmapp { 30 int dmapp_id; 31 u32 chcr; 32 }; 33 34 struct 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 46 struct rsnd_dma_ctrl { 47 void __iomem *ppbase; 48 phys_addr_t ppres; 49 int dmaen_num; 50 int dmapp_num; 51 }; 52 53 #define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma) 54 #define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod) 55 #define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en) 56 #define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp) 57 58 /* for DEBUG */ 59 static struct rsnd_mod_ops mem_ops = { 60 .name = "mem", 61 }; 62 63 static struct rsnd_mod mem = { 64 }; 65 66 /* 67 * Audio DMAC 68 */ 69 static void __rsnd_dmaen_complete(struct rsnd_mod *mod, 70 struct rsnd_dai_stream *io) 71 { 72 if (rsnd_io_is_working(io)) 73 rsnd_dai_period_elapsed(io); 74 } 75 76 static void rsnd_dmaen_complete(void *data) 77 { 78 struct rsnd_mod *mod = data; 79 80 rsnd_mod_interrupt(mod, __rsnd_dmaen_complete); 81 } 82 83 static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io, 84 struct rsnd_mod *mod_from, 85 struct rsnd_mod *mod_to) 86 { 87 if ((!mod_from && !mod_to) || 88 (mod_from && mod_to)) 89 return NULL; 90 91 if (mod_from) 92 return rsnd_mod_dma_req(io, mod_from); 93 else 94 return rsnd_mod_dma_req(io, mod_to); 95 } 96 97 static int rsnd_dmaen_stop(struct rsnd_mod *mod, 98 struct rsnd_dai_stream *io, 99 struct rsnd_priv *priv) 100 { 101 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 102 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 103 104 if (dmaen->chan) 105 dmaengine_terminate_all(dmaen->chan); 106 107 return 0; 108 } 109 110 static int rsnd_dmaen_cleanup(struct rsnd_mod *mod, 111 struct rsnd_dai_stream *io, 112 struct rsnd_priv *priv) 113 { 114 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 115 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 116 117 /* 118 * DMAEngine release uses mutex lock. 119 * Thus, it shouldn't be called under spinlock. 120 * Let's call it under prepare 121 */ 122 if (dmaen->chan) 123 dma_release_channel(dmaen->chan); 124 125 dmaen->chan = NULL; 126 127 return 0; 128 } 129 130 static int rsnd_dmaen_prepare(struct rsnd_mod *mod, 131 struct rsnd_dai_stream *io, 132 struct rsnd_priv *priv) 133 { 134 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 135 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 136 struct device *dev = rsnd_priv_to_dev(priv); 137 138 /* maybe suspended */ 139 if (dmaen->chan) 140 return 0; 141 142 /* 143 * DMAEngine request uses mutex lock. 144 * Thus, it shouldn't be called under spinlock. 145 * Let's call it under prepare 146 */ 147 dmaen->chan = rsnd_dmaen_request_channel(io, 148 dma->mod_from, 149 dma->mod_to); 150 if (IS_ERR_OR_NULL(dmaen->chan)) { 151 dmaen->chan = NULL; 152 dev_err(dev, "can't get dma channel\n"); 153 return -EIO; 154 } 155 156 return 0; 157 } 158 159 static int rsnd_dmaen_start(struct rsnd_mod *mod, 160 struct rsnd_dai_stream *io, 161 struct rsnd_priv *priv) 162 { 163 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 164 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 165 struct snd_pcm_substream *substream = io->substream; 166 struct device *dev = rsnd_priv_to_dev(priv); 167 struct dma_async_tx_descriptor *desc; 168 struct dma_slave_config cfg = {}; 169 enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; 170 int is_play = rsnd_io_is_play(io); 171 int ret; 172 173 /* 174 * in case of monaural data writing or reading through Audio-DMAC 175 * data is always in Left Justified format, so both src and dst 176 * DMA Bus width need to be set equal to physical data width. 177 */ 178 if (rsnd_runtime_channel_original(io) == 1) { 179 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 180 int bits = snd_pcm_format_physical_width(runtime->format); 181 182 switch (bits) { 183 case 8: 184 buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; 185 break; 186 case 16: 187 buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; 188 break; 189 case 32: 190 buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; 191 break; 192 default: 193 dev_err(dev, "invalid format width %d\n", bits); 194 return -EINVAL; 195 } 196 } 197 198 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 199 cfg.src_addr = dma->src_addr; 200 cfg.dst_addr = dma->dst_addr; 201 cfg.src_addr_width = buswidth; 202 cfg.dst_addr_width = buswidth; 203 204 dev_dbg(dev, "%s %pad -> %pad\n", 205 rsnd_mod_name(mod), 206 &cfg.src_addr, &cfg.dst_addr); 207 208 ret = dmaengine_slave_config(dmaen->chan, &cfg); 209 if (ret < 0) 210 return ret; 211 212 desc = dmaengine_prep_dma_cyclic(dmaen->chan, 213 substream->runtime->dma_addr, 214 snd_pcm_lib_buffer_bytes(substream), 215 snd_pcm_lib_period_bytes(substream), 216 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, 217 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 218 219 if (!desc) { 220 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 221 return -EIO; 222 } 223 224 desc->callback = rsnd_dmaen_complete; 225 desc->callback_param = rsnd_mod_get(dma); 226 227 dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream); 228 229 dmaen->cookie = dmaengine_submit(desc); 230 if (dmaen->cookie < 0) { 231 dev_err(dev, "dmaengine_submit() fail\n"); 232 return -EIO; 233 } 234 235 dma_async_issue_pending(dmaen->chan); 236 237 return 0; 238 } 239 240 struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node, char *name, 241 struct rsnd_mod *mod, char *x) 242 { 243 struct dma_chan *chan = NULL; 244 struct device_node *np; 245 int i = 0; 246 247 for_each_child_of_node(of_node, np) { 248 i = rsnd_node_fixed_index(np, name, i); 249 250 if (i == rsnd_mod_id_raw(mod) && (!chan)) 251 chan = of_dma_request_slave_channel(np, x); 252 i++; 253 } 254 255 /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */ 256 of_node_put(of_node); 257 258 return chan; 259 } 260 261 static int rsnd_dmaen_attach(struct rsnd_dai_stream *io, 262 struct rsnd_dma *dma, 263 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 264 { 265 struct rsnd_priv *priv = rsnd_io_to_priv(io); 266 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 267 struct dma_chan *chan; 268 269 /* try to get DMAEngine channel */ 270 chan = rsnd_dmaen_request_channel(io, mod_from, mod_to); 271 if (IS_ERR_OR_NULL(chan)) { 272 /* Let's follow when -EPROBE_DEFER case */ 273 if (PTR_ERR(chan) == -EPROBE_DEFER) 274 return PTR_ERR(chan); 275 276 /* 277 * DMA failed. try to PIO mode 278 * see 279 * rsnd_ssi_fallback() 280 * rsnd_rdai_continuance_probe() 281 */ 282 return -EAGAIN; 283 } 284 285 /* 286 * use it for IPMMU if needed 287 * see 288 * rsnd_preallocate_pages() 289 */ 290 io->dmac_dev = chan->device->dev; 291 292 dma_release_channel(chan); 293 294 dmac->dmaen_num++; 295 296 return 0; 297 } 298 299 static int rsnd_dmaen_pointer(struct rsnd_mod *mod, 300 struct rsnd_dai_stream *io, 301 snd_pcm_uframes_t *pointer) 302 { 303 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 304 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 305 struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma); 306 struct dma_tx_state state; 307 enum dma_status status; 308 unsigned int pos = 0; 309 310 status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state); 311 if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) { 312 if (state.residue > 0 && state.residue <= dmaen->dma_len) 313 pos = dmaen->dma_len - state.residue; 314 } 315 *pointer = bytes_to_frames(runtime, pos); 316 317 return 0; 318 } 319 320 static struct rsnd_mod_ops rsnd_dmaen_ops = { 321 .name = "audmac", 322 .prepare = rsnd_dmaen_prepare, 323 .cleanup = rsnd_dmaen_cleanup, 324 .start = rsnd_dmaen_start, 325 .stop = rsnd_dmaen_stop, 326 .pointer = rsnd_dmaen_pointer, 327 .get_status = rsnd_mod_get_status, 328 }; 329 330 /* 331 * Audio DMAC peri peri 332 */ 333 static const u8 gen2_id_table_ssiu[] = { 334 /* SSI00 ~ SSI07 */ 335 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c, 336 /* SSI10 ~ SSI17 */ 337 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40, 338 /* SSI20 ~ SSI27 */ 339 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44, 340 /* SSI30 ~ SSI37 */ 341 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 342 /* SSI40 ~ SSI47 */ 343 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 344 /* SSI5 */ 345 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 346 /* SSI6 */ 347 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 348 /* SSI7 */ 349 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 350 /* SSI8 */ 351 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 352 /* SSI90 ~ SSI97 */ 353 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56, 354 }; 355 static const u8 gen2_id_table_scu[] = { 356 0x2d, /* SCU_SRCI0 */ 357 0x2e, /* SCU_SRCI1 */ 358 0x2f, /* SCU_SRCI2 */ 359 0x30, /* SCU_SRCI3 */ 360 0x31, /* SCU_SRCI4 */ 361 0x32, /* SCU_SRCI5 */ 362 0x33, /* SCU_SRCI6 */ 363 0x34, /* SCU_SRCI7 */ 364 0x35, /* SCU_SRCI8 */ 365 0x36, /* SCU_SRCI9 */ 366 }; 367 static const u8 gen2_id_table_cmd[] = { 368 0x37, /* SCU_CMD0 */ 369 0x38, /* SCU_CMD1 */ 370 }; 371 372 static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io, 373 struct rsnd_mod *mod) 374 { 375 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 376 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io); 377 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 378 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 379 const u8 *entry = NULL; 380 int id = 255; 381 int size = 0; 382 383 if ((mod == ssi) || 384 (mod == ssiu)) { 385 int busif = rsnd_mod_id_sub(ssiu); 386 387 entry = gen2_id_table_ssiu; 388 size = ARRAY_SIZE(gen2_id_table_ssiu); 389 id = (rsnd_mod_id(mod) * 8) + busif; 390 } else if (mod == src) { 391 entry = gen2_id_table_scu; 392 size = ARRAY_SIZE(gen2_id_table_scu); 393 id = rsnd_mod_id(mod); 394 } else if (mod == dvc) { 395 entry = gen2_id_table_cmd; 396 size = ARRAY_SIZE(gen2_id_table_cmd); 397 id = rsnd_mod_id(mod); 398 } 399 400 if ((!entry) || (size <= id)) { 401 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io)); 402 403 dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod)); 404 405 /* use non-prohibited SRS number as error */ 406 return 0x00; /* SSI00 */ 407 } 408 409 return entry[id]; 410 } 411 412 static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io, 413 struct rsnd_mod *mod_from, 414 struct rsnd_mod *mod_to) 415 { 416 return (rsnd_dmapp_get_id(io, mod_from) << 24) + 417 (rsnd_dmapp_get_id(io, mod_to) << 16); 418 } 419 420 #define rsnd_dmapp_addr(dmac, dma, reg) \ 421 (dmac->ppbase + 0x20 + reg + \ 422 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id)) 423 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg) 424 { 425 struct rsnd_mod *mod = rsnd_mod_get(dma); 426 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 427 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 428 struct device *dev = rsnd_priv_to_dev(priv); 429 430 dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data); 431 432 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg)); 433 } 434 435 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg) 436 { 437 struct rsnd_mod *mod = rsnd_mod_get(dma); 438 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 439 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 440 441 return ioread32(rsnd_dmapp_addr(dmac, dma, reg)); 442 } 443 444 static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg) 445 { 446 struct rsnd_mod *mod = rsnd_mod_get(dma); 447 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 448 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 449 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg); 450 u32 val = ioread32(addr); 451 452 val &= ~mask; 453 val |= (data & mask); 454 455 iowrite32(val, addr); 456 } 457 458 static int rsnd_dmapp_stop(struct rsnd_mod *mod, 459 struct rsnd_dai_stream *io, 460 struct rsnd_priv *priv) 461 { 462 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 463 int i; 464 465 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR); 466 467 for (i = 0; i < 1024; i++) { 468 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE)) 469 return 0; 470 udelay(1); 471 } 472 473 return -EIO; 474 } 475 476 static int rsnd_dmapp_start(struct rsnd_mod *mod, 477 struct rsnd_dai_stream *io, 478 struct rsnd_priv *priv) 479 { 480 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 481 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 482 483 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR); 484 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR); 485 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR); 486 487 return 0; 488 } 489 490 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io, 491 struct rsnd_dma *dma, 492 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 493 { 494 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 495 struct rsnd_priv *priv = rsnd_io_to_priv(io); 496 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 497 struct device *dev = rsnd_priv_to_dev(priv); 498 499 dmapp->dmapp_id = dmac->dmapp_num; 500 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE; 501 502 dmac->dmapp_num++; 503 504 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n", 505 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr); 506 507 return 0; 508 } 509 510 #ifdef CONFIG_DEBUG_FS 511 static void rsnd_dmapp_debug_info(struct seq_file *m, 512 struct rsnd_dai_stream *io, 513 struct rsnd_mod *mod) 514 { 515 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 516 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 517 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 518 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 519 520 rsnd_debugfs_reg_show(m, dmac->ppres, dmac->ppbase, 521 0x20 + 0x10 * dmapp->dmapp_id, 0x10); 522 } 523 #define DEBUG_INFO .debug_info = rsnd_dmapp_debug_info 524 #else 525 #define DEBUG_INFO 526 #endif 527 528 static struct rsnd_mod_ops rsnd_dmapp_ops = { 529 .name = "audmac-pp", 530 .start = rsnd_dmapp_start, 531 .stop = rsnd_dmapp_stop, 532 .quit = rsnd_dmapp_stop, 533 .get_status = rsnd_mod_get_status, 534 DEBUG_INFO 535 }; 536 537 /* 538 * Common DMAC Interface 539 */ 540 541 /* 542 * DMA read/write register offset 543 * 544 * RSND_xxx_I_N for Audio DMAC input 545 * RSND_xxx_O_N for Audio DMAC output 546 * RSND_xxx_I_P for Audio DMAC peri peri input 547 * RSND_xxx_O_P for Audio DMAC peri peri output 548 * 549 * ex) R-Car H2 case 550 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out 551 * SSI : 0xec541000 / 0xec241008 / 0xec24100c 552 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000 553 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000 554 * CMD : 0xec500000 / / 0xec008000 0xec308000 555 */ 556 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8) 557 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc) 558 559 #define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4))) 560 #define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j) 561 562 #define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4))) 563 #define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j) 564 565 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i)) 566 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i)) 567 568 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i)) 569 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i)) 570 571 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i)) 572 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i)) 573 574 static dma_addr_t 575 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io, 576 struct rsnd_mod *mod, 577 int is_play, int is_from) 578 { 579 struct rsnd_priv *priv = rsnd_io_to_priv(io); 580 struct device *dev = rsnd_priv_to_dev(priv); 581 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI); 582 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU); 583 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) || 584 !!(rsnd_io_to_mod_ssiu(io) == mod); 585 int use_src = !!rsnd_io_to_mod_src(io); 586 int use_cmd = !!rsnd_io_to_mod_dvc(io) || 587 !!rsnd_io_to_mod_mix(io) || 588 !!rsnd_io_to_mod_ctu(io); 589 int id = rsnd_mod_id(mod); 590 int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io)); 591 struct dma_addr { 592 dma_addr_t out_addr; 593 dma_addr_t in_addr; 594 } dma_addrs[3][2][3] = { 595 /* SRC */ 596 /* Capture */ 597 {{{ 0, 0 }, 598 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) }, 599 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } }, 600 /* Playback */ 601 {{ 0, 0, }, 602 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) }, 603 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } } 604 }, 605 /* SSI */ 606 /* Capture */ 607 {{{ RDMA_SSI_O_N(ssi, id), 0 }, 608 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 609 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 610 /* Playback */ 611 {{ 0, RDMA_SSI_I_N(ssi, id) }, 612 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 613 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } 614 }, 615 /* SSIU */ 616 /* Capture */ 617 {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 }, 618 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 619 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 620 /* Playback */ 621 {{ 0, RDMA_SSIU_I_N(ssi, id, busif) }, 622 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 623 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } }, 624 }; 625 626 /* 627 * FIXME 628 * 629 * We can't support SSI9-4/5/6/7, because its address is 630 * out of calculation rule 631 */ 632 if ((id == 9) && (busif >= 4)) 633 dev_err(dev, "This driver doesn't support SSI%d-%d, so far", 634 id, busif); 635 636 /* it shouldn't happen */ 637 if (use_cmd && !use_src) 638 dev_err(dev, "DVC is selected without SRC\n"); 639 640 /* use SSIU or SSI ? */ 641 if (is_ssi && rsnd_ssi_use_busif(io)) 642 is_ssi++; 643 644 return (is_from) ? 645 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr : 646 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr; 647 } 648 649 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io, 650 struct rsnd_mod *mod, 651 int is_play, int is_from) 652 { 653 struct rsnd_priv *priv = rsnd_io_to_priv(io); 654 655 /* 656 * gen1 uses default DMA addr 657 */ 658 if (rsnd_is_gen1(priv)) 659 return 0; 660 661 if (!mod) 662 return 0; 663 664 return rsnd_gen2_dma_addr(io, mod, is_play, is_from); 665 } 666 667 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */ 668 static void rsnd_dma_of_path(struct rsnd_mod *this, 669 struct rsnd_dai_stream *io, 670 int is_play, 671 struct rsnd_mod **mod_from, 672 struct rsnd_mod **mod_to) 673 { 674 struct rsnd_mod *ssi; 675 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 676 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io); 677 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io); 678 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 679 struct rsnd_mod *mod[MOD_MAX]; 680 struct rsnd_mod *mod_start, *mod_end; 681 struct rsnd_priv *priv = rsnd_mod_to_priv(this); 682 struct device *dev = rsnd_priv_to_dev(priv); 683 int nr, i, idx; 684 685 /* 686 * It should use "rcar_sound,ssiu" on DT. 687 * But, we need to keep compatibility for old version. 688 * 689 * If it has "rcar_sound.ssiu", it will be used. 690 * If not, "rcar_sound.ssi" will be used. 691 * see 692 * rsnd_ssiu_dma_req() 693 * rsnd_ssi_dma_req() 694 */ 695 if (rsnd_ssiu_of_node(priv)) { 696 struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io); 697 698 /* use SSIU */ 699 ssi = ssiu; 700 if (this == rsnd_io_to_mod_ssi(io)) 701 this = ssiu; 702 } else { 703 /* keep compatible, use SSI */ 704 ssi = rsnd_io_to_mod_ssi(io); 705 } 706 707 if (!ssi) 708 return; 709 710 nr = 0; 711 for (i = 0; i < MOD_MAX; i++) { 712 mod[i] = NULL; 713 nr += !!rsnd_io_to_mod(io, i); 714 } 715 716 /* 717 * [S] -*-> [E] 718 * [S] -*-> SRC -o-> [E] 719 * [S] -*-> SRC -> DVC -o-> [E] 720 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E] 721 * 722 * playback [S] = mem 723 * [E] = SSI 724 * 725 * capture [S] = SSI 726 * [E] = mem 727 * 728 * -*-> Audio DMAC 729 * -o-> Audio DMAC peri peri 730 */ 731 mod_start = (is_play) ? NULL : ssi; 732 mod_end = (is_play) ? ssi : NULL; 733 734 idx = 0; 735 mod[idx++] = mod_start; 736 for (i = 1; i < nr; i++) { 737 if (src) { 738 mod[idx++] = src; 739 src = NULL; 740 } else if (ctu) { 741 mod[idx++] = ctu; 742 ctu = NULL; 743 } else if (mix) { 744 mod[idx++] = mix; 745 mix = NULL; 746 } else if (dvc) { 747 mod[idx++] = dvc; 748 dvc = NULL; 749 } 750 } 751 mod[idx] = mod_end; 752 753 /* 754 * | SSI | SRC | 755 * -------------+-----+-----+ 756 * is_play | o | * | 757 * !is_play | * | o | 758 */ 759 if ((this == ssi) == (is_play)) { 760 *mod_from = mod[idx - 1]; 761 *mod_to = mod[idx]; 762 } else { 763 *mod_from = mod[0]; 764 *mod_to = mod[1]; 765 } 766 767 dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this)); 768 for (i = 0; i <= idx; i++) { 769 dev_dbg(dev, " %s%s\n", 770 rsnd_mod_name(mod[i] ? mod[i] : &mem), 771 (mod[i] == *mod_from) ? " from" : 772 (mod[i] == *mod_to) ? " to" : ""); 773 } 774 } 775 776 static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 777 struct rsnd_mod **dma_mod) 778 { 779 struct rsnd_mod *mod_from = NULL; 780 struct rsnd_mod *mod_to = NULL; 781 struct rsnd_priv *priv = rsnd_io_to_priv(io); 782 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 783 struct device *dev = rsnd_priv_to_dev(priv); 784 struct rsnd_dma *dma; 785 struct rsnd_mod_ops *ops; 786 enum rsnd_mod_type type; 787 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, 788 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to); 789 int is_play = rsnd_io_is_play(io); 790 int ret, dma_id; 791 792 /* 793 * DMA failed. try to PIO mode 794 * see 795 * rsnd_ssi_fallback() 796 * rsnd_rdai_continuance_probe() 797 */ 798 if (!dmac) 799 return -EAGAIN; 800 801 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to); 802 803 /* for Gen2 or later */ 804 if (mod_from && mod_to) { 805 ops = &rsnd_dmapp_ops; 806 attach = rsnd_dmapp_attach; 807 dma_id = dmac->dmapp_num; 808 type = RSND_MOD_AUDMAPP; 809 } else { 810 ops = &rsnd_dmaen_ops; 811 attach = rsnd_dmaen_attach; 812 dma_id = dmac->dmaen_num; 813 type = RSND_MOD_AUDMA; 814 } 815 816 /* for Gen1, overwrite */ 817 if (rsnd_is_gen1(priv)) { 818 ops = &rsnd_dmaen_ops; 819 attach = rsnd_dmaen_attach; 820 dma_id = dmac->dmaen_num; 821 type = RSND_MOD_AUDMA; 822 } 823 824 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); 825 if (!dma) 826 return -ENOMEM; 827 828 *dma_mod = rsnd_mod_get(dma); 829 830 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL, 831 type, dma_id); 832 if (ret < 0) 833 return ret; 834 835 dev_dbg(dev, "%s %s -> %s\n", 836 rsnd_mod_name(*dma_mod), 837 rsnd_mod_name(mod_from ? mod_from : &mem), 838 rsnd_mod_name(mod_to ? mod_to : &mem)); 839 840 ret = attach(io, dma, mod_from, mod_to); 841 if (ret < 0) 842 return ret; 843 844 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1); 845 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0); 846 dma->mod_from = mod_from; 847 dma->mod_to = mod_to; 848 849 return 0; 850 } 851 852 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 853 struct rsnd_mod **dma_mod) 854 { 855 if (!(*dma_mod)) { 856 int ret = rsnd_dma_alloc(io, mod, dma_mod); 857 858 if (ret < 0) 859 return ret; 860 } 861 862 return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type); 863 } 864 865 int rsnd_dma_probe(struct rsnd_priv *priv) 866 { 867 struct platform_device *pdev = rsnd_priv_to_pdev(priv); 868 struct device *dev = rsnd_priv_to_dev(priv); 869 struct rsnd_dma_ctrl *dmac; 870 struct resource *res; 871 872 /* 873 * for Gen1 874 */ 875 if (rsnd_is_gen1(priv)) 876 return 0; 877 878 /* 879 * for Gen2 or later 880 */ 881 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp"); 882 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); 883 if (!dmac || !res) { 884 dev_err(dev, "dma allocate failed\n"); 885 return 0; /* it will be PIO mode */ 886 } 887 888 dmac->dmapp_num = 0; 889 dmac->ppres = res->start; 890 dmac->ppbase = devm_ioremap_resource(dev, res); 891 if (IS_ERR(dmac->ppbase)) 892 return PTR_ERR(dmac->ppbase); 893 894 priv->dma = dmac; 895 896 /* dummy mem mod for debug */ 897 return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0); 898 } 899