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