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[%d] %pad -> %pad\n", 178 rsnd_mod_name(mod), rsnd_mod_id(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(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 }; 299 300 /* 301 * Audio DMAC peri peri 302 */ 303 static const u8 gen2_id_table_ssiu[] = { 304 /* SSI00 ~ SSI07 */ 305 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c, 306 /* SSI10 ~ SSI17 */ 307 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40, 308 /* SSI20 ~ SSI27 */ 309 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44, 310 /* SSI30 ~ SSI37 */ 311 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 312 /* SSI40 ~ SSI47 */ 313 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 314 /* SSI5 */ 315 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 316 /* SSI6 */ 317 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 318 /* SSI7 */ 319 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 320 /* SSI8 */ 321 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 322 /* SSI90 ~ SSI97 */ 323 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56, 324 }; 325 static const u8 gen2_id_table_scu[] = { 326 0x2d, /* SCU_SRCI0 */ 327 0x2e, /* SCU_SRCI1 */ 328 0x2f, /* SCU_SRCI2 */ 329 0x30, /* SCU_SRCI3 */ 330 0x31, /* SCU_SRCI4 */ 331 0x32, /* SCU_SRCI5 */ 332 0x33, /* SCU_SRCI6 */ 333 0x34, /* SCU_SRCI7 */ 334 0x35, /* SCU_SRCI8 */ 335 0x36, /* SCU_SRCI9 */ 336 }; 337 static const u8 gen2_id_table_cmd[] = { 338 0x37, /* SCU_CMD0 */ 339 0x38, /* SCU_CMD1 */ 340 }; 341 342 static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io, 343 struct rsnd_mod *mod) 344 { 345 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 346 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 347 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 348 const u8 *entry = NULL; 349 int id = 255; 350 int size = 0; 351 352 if (mod == ssi) { 353 int busif = rsnd_ssi_get_busif(io); 354 355 entry = gen2_id_table_ssiu; 356 size = ARRAY_SIZE(gen2_id_table_ssiu); 357 id = (rsnd_mod_id(mod) * 8) + busif; 358 } else if (mod == src) { 359 entry = gen2_id_table_scu; 360 size = ARRAY_SIZE(gen2_id_table_scu); 361 id = rsnd_mod_id(mod); 362 } else if (mod == dvc) { 363 entry = gen2_id_table_cmd; 364 size = ARRAY_SIZE(gen2_id_table_cmd); 365 id = rsnd_mod_id(mod); 366 } 367 368 if ((!entry) || (size <= id)) { 369 struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io)); 370 371 dev_err(dev, "unknown connection (%s[%d])\n", 372 rsnd_mod_name(mod), rsnd_mod_id(mod)); 373 374 /* use non-prohibited SRS number as error */ 375 return 0x00; /* SSI00 */ 376 } 377 378 return entry[id]; 379 } 380 381 static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io, 382 struct rsnd_mod *mod_from, 383 struct rsnd_mod *mod_to) 384 { 385 return (rsnd_dmapp_get_id(io, mod_from) << 24) + 386 (rsnd_dmapp_get_id(io, mod_to) << 16); 387 } 388 389 #define rsnd_dmapp_addr(dmac, dma, reg) \ 390 (dmac->base + 0x20 + reg + \ 391 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id)) 392 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg) 393 { 394 struct rsnd_mod *mod = rsnd_mod_get(dma); 395 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 396 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 397 struct device *dev = rsnd_priv_to_dev(priv); 398 399 dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data); 400 401 iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg)); 402 } 403 404 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg) 405 { 406 struct rsnd_mod *mod = rsnd_mod_get(dma); 407 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 408 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 409 410 return ioread32(rsnd_dmapp_addr(dmac, dma, reg)); 411 } 412 413 static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg) 414 { 415 struct rsnd_mod *mod = rsnd_mod_get(dma); 416 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 417 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 418 void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg); 419 u32 val = ioread32(addr); 420 421 val &= ~mask; 422 val |= (data & mask); 423 424 iowrite32(val, addr); 425 } 426 427 static int rsnd_dmapp_stop(struct rsnd_mod *mod, 428 struct rsnd_dai_stream *io, 429 struct rsnd_priv *priv) 430 { 431 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 432 int i; 433 434 rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR); 435 436 for (i = 0; i < 1024; i++) { 437 if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE)) 438 return 0; 439 udelay(1); 440 } 441 442 return -EIO; 443 } 444 445 static int rsnd_dmapp_start(struct rsnd_mod *mod, 446 struct rsnd_dai_stream *io, 447 struct rsnd_priv *priv) 448 { 449 struct rsnd_dma *dma = rsnd_mod_to_dma(mod); 450 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 451 452 rsnd_dmapp_write(dma, dma->src_addr, PDMASAR); 453 rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR); 454 rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR); 455 456 return 0; 457 } 458 459 static int rsnd_dmapp_attach(struct rsnd_dai_stream *io, 460 struct rsnd_dma *dma, 461 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to) 462 { 463 struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma); 464 struct rsnd_priv *priv = rsnd_io_to_priv(io); 465 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 466 struct device *dev = rsnd_priv_to_dev(priv); 467 468 dmapp->dmapp_id = dmac->dmapp_num; 469 dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE; 470 471 dmac->dmapp_num++; 472 473 dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n", 474 dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr); 475 476 return 0; 477 } 478 479 static struct rsnd_mod_ops rsnd_dmapp_ops = { 480 .name = "audmac-pp", 481 .start = rsnd_dmapp_start, 482 .stop = rsnd_dmapp_stop, 483 .quit = rsnd_dmapp_stop, 484 }; 485 486 /* 487 * Common DMAC Interface 488 */ 489 490 /* 491 * DMA read/write register offset 492 * 493 * RSND_xxx_I_N for Audio DMAC input 494 * RSND_xxx_O_N for Audio DMAC output 495 * RSND_xxx_I_P for Audio DMAC peri peri input 496 * RSND_xxx_O_P for Audio DMAC peri peri output 497 * 498 * ex) R-Car H2 case 499 * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out 500 * SSI : 0xec541000 / 0xec241008 / 0xec24100c 501 * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000 502 * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000 503 * CMD : 0xec500000 / / 0xec008000 0xec308000 504 */ 505 #define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8) 506 #define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc) 507 508 #define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400)) 509 #define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j) 510 511 #define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400)) 512 #define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j) 513 514 #define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i)) 515 #define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i)) 516 517 #define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i)) 518 #define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i)) 519 520 #define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i)) 521 #define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i)) 522 523 static dma_addr_t 524 rsnd_gen2_dma_addr(struct rsnd_dai_stream *io, 525 struct rsnd_mod *mod, 526 int is_play, int is_from) 527 { 528 struct rsnd_priv *priv = rsnd_io_to_priv(io); 529 struct device *dev = rsnd_priv_to_dev(priv); 530 phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI); 531 phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU); 532 int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod); 533 int use_src = !!rsnd_io_to_mod_src(io); 534 int use_cmd = !!rsnd_io_to_mod_dvc(io) || 535 !!rsnd_io_to_mod_mix(io) || 536 !!rsnd_io_to_mod_ctu(io); 537 int id = rsnd_mod_id(mod); 538 int busif = rsnd_ssi_get_busif(io); 539 struct dma_addr { 540 dma_addr_t out_addr; 541 dma_addr_t in_addr; 542 } dma_addrs[3][2][3] = { 543 /* SRC */ 544 /* Capture */ 545 {{{ 0, 0 }, 546 { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) }, 547 { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } }, 548 /* Playback */ 549 {{ 0, 0, }, 550 { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) }, 551 { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } } 552 }, 553 /* SSI */ 554 /* Capture */ 555 {{{ RDMA_SSI_O_N(ssi, id), 0 }, 556 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 557 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 558 /* Playback */ 559 {{ 0, RDMA_SSI_I_N(ssi, id) }, 560 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 561 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } 562 }, 563 /* SSIU */ 564 /* Capture */ 565 {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 }, 566 { RDMA_SSIU_O_P(ssi, id, busif), 0 }, 567 { RDMA_SSIU_O_P(ssi, id, busif), 0 } }, 568 /* Playback */ 569 {{ 0, RDMA_SSIU_I_N(ssi, id, busif) }, 570 { 0, RDMA_SSIU_I_P(ssi, id, busif) }, 571 { 0, RDMA_SSIU_I_P(ssi, id, busif) } } }, 572 }; 573 574 /* 575 * FIXME 576 * 577 * We can't support SSI9-4/5/6/7, because its address is 578 * out of calculation rule 579 */ 580 if ((id == 9) && (busif >= 4)) 581 dev_err(dev, "This driver doesn't support SSI%d-%d, so far", 582 id, busif); 583 584 /* it shouldn't happen */ 585 if (use_cmd && !use_src) 586 dev_err(dev, "DVC is selected without SRC\n"); 587 588 /* use SSIU or SSI ? */ 589 if (is_ssi && rsnd_ssi_use_busif(io)) 590 is_ssi++; 591 592 return (is_from) ? 593 dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr : 594 dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr; 595 } 596 597 static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io, 598 struct rsnd_mod *mod, 599 int is_play, int is_from) 600 { 601 struct rsnd_priv *priv = rsnd_io_to_priv(io); 602 603 /* 604 * gen1 uses default DMA addr 605 */ 606 if (rsnd_is_gen1(priv)) 607 return 0; 608 609 if (!mod) 610 return 0; 611 612 return rsnd_gen2_dma_addr(io, mod, is_play, is_from); 613 } 614 615 #define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */ 616 static void rsnd_dma_of_path(struct rsnd_mod *this, 617 struct rsnd_dai_stream *io, 618 int is_play, 619 struct rsnd_mod **mod_from, 620 struct rsnd_mod **mod_to) 621 { 622 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 623 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 624 struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io); 625 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io); 626 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 627 struct rsnd_mod *mod[MOD_MAX]; 628 struct rsnd_mod *mod_start, *mod_end; 629 struct rsnd_priv *priv = rsnd_mod_to_priv(this); 630 struct device *dev = rsnd_priv_to_dev(priv); 631 int nr, i, idx; 632 633 if (!ssi) 634 return; 635 636 nr = 0; 637 for (i = 0; i < MOD_MAX; i++) { 638 mod[i] = NULL; 639 nr += !!rsnd_io_to_mod(io, i); 640 } 641 642 /* 643 * [S] -*-> [E] 644 * [S] -*-> SRC -o-> [E] 645 * [S] -*-> SRC -> DVC -o-> [E] 646 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E] 647 * 648 * playback [S] = mem 649 * [E] = SSI 650 * 651 * capture [S] = SSI 652 * [E] = mem 653 * 654 * -*-> Audio DMAC 655 * -o-> Audio DMAC peri peri 656 */ 657 mod_start = (is_play) ? NULL : ssi; 658 mod_end = (is_play) ? ssi : NULL; 659 660 idx = 0; 661 mod[idx++] = mod_start; 662 for (i = 1; i < nr; i++) { 663 if (src) { 664 mod[idx++] = src; 665 src = NULL; 666 } else if (ctu) { 667 mod[idx++] = ctu; 668 ctu = NULL; 669 } else if (mix) { 670 mod[idx++] = mix; 671 mix = NULL; 672 } else if (dvc) { 673 mod[idx++] = dvc; 674 dvc = NULL; 675 } 676 } 677 mod[idx] = mod_end; 678 679 /* 680 * | SSI | SRC | 681 * -------------+-----+-----+ 682 * is_play | o | * | 683 * !is_play | * | o | 684 */ 685 if ((this == ssi) == (is_play)) { 686 *mod_from = mod[idx - 1]; 687 *mod_to = mod[idx]; 688 } else { 689 *mod_from = mod[0]; 690 *mod_to = mod[1]; 691 } 692 693 dev_dbg(dev, "module connection (this is %s[%d])\n", 694 rsnd_mod_name(this), rsnd_mod_id(this)); 695 for (i = 0; i <= idx; i++) { 696 dev_dbg(dev, " %s[%d]%s\n", 697 rsnd_mod_name(mod[i] ? mod[i] : &mem), 698 rsnd_mod_id (mod[i] ? mod[i] : &mem), 699 (mod[i] == *mod_from) ? " from" : 700 (mod[i] == *mod_to) ? " to" : ""); 701 } 702 } 703 704 static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 705 struct rsnd_mod **dma_mod) 706 { 707 struct rsnd_mod *mod_from = NULL; 708 struct rsnd_mod *mod_to = NULL; 709 struct rsnd_priv *priv = rsnd_io_to_priv(io); 710 struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv); 711 struct device *dev = rsnd_priv_to_dev(priv); 712 struct rsnd_dma *dma; 713 struct rsnd_mod_ops *ops; 714 enum rsnd_mod_type type; 715 int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma, 716 struct rsnd_mod *mod_from, struct rsnd_mod *mod_to); 717 int is_play = rsnd_io_is_play(io); 718 int ret, dma_id; 719 720 /* 721 * DMA failed. try to PIO mode 722 * see 723 * rsnd_ssi_fallback() 724 * rsnd_rdai_continuance_probe() 725 */ 726 if (!dmac) 727 return -EAGAIN; 728 729 rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to); 730 731 /* for Gen2 or later */ 732 if (mod_from && mod_to) { 733 ops = &rsnd_dmapp_ops; 734 attach = rsnd_dmapp_attach; 735 dma_id = dmac->dmapp_num; 736 type = RSND_MOD_AUDMAPP; 737 } else { 738 ops = &rsnd_dmaen_ops; 739 attach = rsnd_dmaen_attach; 740 dma_id = dmac->dmaen_num; 741 type = RSND_MOD_AUDMA; 742 } 743 744 /* for Gen1, overwrite */ 745 if (rsnd_is_gen1(priv)) { 746 ops = &rsnd_dmaen_ops; 747 attach = rsnd_dmaen_attach; 748 dma_id = dmac->dmaen_num; 749 type = RSND_MOD_AUDMA; 750 } 751 752 dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); 753 if (!dma) 754 return -ENOMEM; 755 756 *dma_mod = rsnd_mod_get(dma); 757 758 ret = rsnd_mod_init(priv, *dma_mod, ops, NULL, 759 rsnd_mod_get_status, type, dma_id); 760 if (ret < 0) 761 return ret; 762 763 dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n", 764 rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod), 765 rsnd_mod_name(mod_from ? mod_from : &mem), 766 rsnd_mod_id (mod_from ? mod_from : &mem), 767 rsnd_mod_name(mod_to ? mod_to : &mem), 768 rsnd_mod_id (mod_to ? mod_to : &mem)); 769 770 ret = attach(io, dma, mod_from, mod_to); 771 if (ret < 0) 772 return ret; 773 774 dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1); 775 dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0); 776 dma->mod_from = mod_from; 777 dma->mod_to = mod_to; 778 779 return 0; 780 } 781 782 int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod, 783 struct rsnd_mod **dma_mod) 784 { 785 if (!(*dma_mod)) { 786 int ret = rsnd_dma_alloc(io, mod, dma_mod); 787 788 if (ret < 0) 789 return ret; 790 } 791 792 return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type); 793 } 794 795 int rsnd_dma_probe(struct rsnd_priv *priv) 796 { 797 struct platform_device *pdev = rsnd_priv_to_pdev(priv); 798 struct device *dev = rsnd_priv_to_dev(priv); 799 struct rsnd_dma_ctrl *dmac; 800 struct resource *res; 801 802 /* 803 * for Gen1 804 */ 805 if (rsnd_is_gen1(priv)) 806 return 0; 807 808 /* 809 * for Gen2 or later 810 */ 811 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp"); 812 dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL); 813 if (!dmac || !res) { 814 dev_err(dev, "dma allocate failed\n"); 815 return 0; /* it will be PIO mode */ 816 } 817 818 dmac->dmapp_num = 0; 819 dmac->base = devm_ioremap_resource(dev, res); 820 if (IS_ERR(dmac->base)) 821 return PTR_ERR(dmac->base); 822 823 priv->dma = dmac; 824 825 /* dummy mem mod for debug */ 826 return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, NULL, 0, 0); 827 } 828