1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * Synopsys DesignWare Mobile Storage Host Controller 33 * Chapter 14, Altera Cyclone V Device Handbook (CV-5V2 2014.07.22) 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/kernel.h> 43 #include <sys/module.h> 44 #include <sys/malloc.h> 45 #include <sys/rman.h> 46 47 #include <dev/mmc/bridge.h> 48 #include <dev/mmc/mmcbrvar.h> 49 50 #include <dev/fdt/fdt_common.h> 51 #include <dev/ofw/openfirm.h> 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 55 #include <machine/bus.h> 56 #include <machine/cpu.h> 57 #include <machine/intr.h> 58 59 #include <dev/mmc/host/dwmmc_reg.h> 60 #include <dev/mmc/host/dwmmc_var.h> 61 62 #include "opt_mmccam.h" 63 64 #include "mmcbr_if.h" 65 66 #define dprintf(x, arg...) 67 68 #define READ4(_sc, _reg) \ 69 bus_read_4((_sc)->res[0], _reg) 70 #define WRITE4(_sc, _reg, _val) \ 71 bus_write_4((_sc)->res[0], _reg, _val) 72 73 #define DIV_ROUND_UP(n, d) howmany(n, d) 74 75 #define DWMMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 76 #define DWMMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 77 #define DWMMC_LOCK_INIT(_sc) \ 78 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 79 "dwmmc", MTX_DEF) 80 #define DWMMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 81 #define DWMMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 82 #define DWMMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 83 84 #define PENDING_CMD 0x01 85 #define PENDING_STOP 0x02 86 #define CARD_INIT_DONE 0x04 87 88 #define DWMMC_DATA_ERR_FLAGS (SDMMC_INTMASK_DRT | SDMMC_INTMASK_DCRC \ 89 |SDMMC_INTMASK_HTO | SDMMC_INTMASK_SBE \ 90 |SDMMC_INTMASK_EBE) 91 #define DWMMC_CMD_ERR_FLAGS (SDMMC_INTMASK_RTO | SDMMC_INTMASK_RCRC \ 92 |SDMMC_INTMASK_RE) 93 #define DWMMC_ERR_FLAGS (DWMMC_DATA_ERR_FLAGS | DWMMC_CMD_ERR_FLAGS \ 94 |SDMMC_INTMASK_HLE) 95 96 #define DES0_DIC (1 << 1) 97 #define DES0_LD (1 << 2) 98 #define DES0_FS (1 << 3) 99 #define DES0_CH (1 << 4) 100 #define DES0_ER (1 << 5) 101 #define DES0_CES (1 << 30) 102 #define DES0_OWN (1 << 31) 103 104 #define DES1_BS1_MASK 0xfff 105 #define DES1_BS1_SHIFT 0 106 107 struct idmac_desc { 108 uint32_t des0; /* control */ 109 uint32_t des1; /* bufsize */ 110 uint32_t des2; /* buf1 phys addr */ 111 uint32_t des3; /* buf2 phys addr or next descr */ 112 }; 113 114 #define DESC_MAX 256 115 #define DESC_SIZE (sizeof(struct idmac_desc) * DESC_MAX) 116 #define DEF_MSIZE 0x2 /* Burst size of multiple transaction */ 117 118 static void dwmmc_next_operation(struct dwmmc_softc *); 119 static int dwmmc_setup_bus(struct dwmmc_softc *, int); 120 static int dma_done(struct dwmmc_softc *, struct mmc_command *); 121 static int dma_stop(struct dwmmc_softc *); 122 static void pio_read(struct dwmmc_softc *, struct mmc_command *); 123 static void pio_write(struct dwmmc_softc *, struct mmc_command *); 124 125 static struct resource_spec dwmmc_spec[] = { 126 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 127 { SYS_RES_IRQ, 0, RF_ACTIVE }, 128 { -1, 0 } 129 }; 130 131 #define HWTYPE_MASK (0x0000ffff) 132 #define HWFLAG_MASK (0xffff << 16) 133 134 static struct ofw_compat_data compat_data[] = { 135 {"altr,socfpga-dw-mshc", HWTYPE_ALTERA}, 136 {"samsung,exynos5420-dw-mshc", HWTYPE_EXYNOS}, 137 {"rockchip,rk2928-dw-mshc", HWTYPE_ROCKCHIP}, 138 {NULL, HWTYPE_NONE}, 139 }; 140 141 static void 142 dwmmc_get1paddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 143 { 144 145 if (error != 0) 146 return; 147 *(bus_addr_t *)arg = segs[0].ds_addr; 148 } 149 150 static void 151 dwmmc_ring_setup(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 152 { 153 struct dwmmc_softc *sc; 154 int idx; 155 156 if (error != 0) 157 return; 158 159 sc = arg; 160 161 dprintf("nsegs %d seg0len %lu\n", nsegs, segs[0].ds_len); 162 163 for (idx = 0; idx < nsegs; idx++) { 164 sc->desc_ring[idx].des0 = (DES0_OWN | DES0_DIC | DES0_CH); 165 sc->desc_ring[idx].des1 = segs[idx].ds_len; 166 sc->desc_ring[idx].des2 = segs[idx].ds_addr; 167 168 if (idx == 0) 169 sc->desc_ring[idx].des0 |= DES0_FS; 170 171 if (idx == (nsegs - 1)) { 172 sc->desc_ring[idx].des0 &= ~(DES0_DIC | DES0_CH); 173 sc->desc_ring[idx].des0 |= DES0_LD; 174 } 175 } 176 } 177 178 static int 179 dwmmc_ctrl_reset(struct dwmmc_softc *sc, int reset_bits) 180 { 181 int reg; 182 int i; 183 184 reg = READ4(sc, SDMMC_CTRL); 185 reg |= (reset_bits); 186 WRITE4(sc, SDMMC_CTRL, reg); 187 188 /* Wait reset done */ 189 for (i = 0; i < 100; i++) { 190 if (!(READ4(sc, SDMMC_CTRL) & reset_bits)) 191 return (0); 192 DELAY(10); 193 } 194 195 device_printf(sc->dev, "Reset failed\n"); 196 197 return (1); 198 } 199 200 static int 201 dma_setup(struct dwmmc_softc *sc) 202 { 203 int error; 204 int nidx; 205 int idx; 206 207 /* 208 * Set up TX descriptor ring, descriptors, and dma maps. 209 */ 210 error = bus_dma_tag_create( 211 bus_get_dma_tag(sc->dev), /* Parent tag. */ 212 4096, 0, /* alignment, boundary */ 213 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 214 BUS_SPACE_MAXADDR, /* highaddr */ 215 NULL, NULL, /* filter, filterarg */ 216 DESC_SIZE, 1, /* maxsize, nsegments */ 217 DESC_SIZE, /* maxsegsize */ 218 0, /* flags */ 219 NULL, NULL, /* lockfunc, lockarg */ 220 &sc->desc_tag); 221 if (error != 0) { 222 device_printf(sc->dev, 223 "could not create ring DMA tag.\n"); 224 return (1); 225 } 226 227 error = bus_dmamem_alloc(sc->desc_tag, (void**)&sc->desc_ring, 228 BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO, 229 &sc->desc_map); 230 if (error != 0) { 231 device_printf(sc->dev, 232 "could not allocate descriptor ring.\n"); 233 return (1); 234 } 235 236 error = bus_dmamap_load(sc->desc_tag, sc->desc_map, 237 sc->desc_ring, DESC_SIZE, dwmmc_get1paddr, 238 &sc->desc_ring_paddr, 0); 239 if (error != 0) { 240 device_printf(sc->dev, 241 "could not load descriptor ring map.\n"); 242 return (1); 243 } 244 245 for (idx = 0; idx < sc->desc_count; idx++) { 246 sc->desc_ring[idx].des0 = DES0_CH; 247 sc->desc_ring[idx].des1 = 0; 248 nidx = (idx + 1) % sc->desc_count; 249 sc->desc_ring[idx].des3 = sc->desc_ring_paddr + \ 250 (nidx * sizeof(struct idmac_desc)); 251 } 252 253 error = bus_dma_tag_create( 254 bus_get_dma_tag(sc->dev), /* Parent tag. */ 255 4096, 0, /* alignment, boundary */ 256 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 257 BUS_SPACE_MAXADDR, /* highaddr */ 258 NULL, NULL, /* filter, filterarg */ 259 sc->desc_count * MMC_SECTOR_SIZE, /* maxsize */ 260 sc->desc_count, /* nsegments */ 261 MMC_SECTOR_SIZE, /* maxsegsize */ 262 0, /* flags */ 263 NULL, NULL, /* lockfunc, lockarg */ 264 &sc->buf_tag); 265 if (error != 0) { 266 device_printf(sc->dev, 267 "could not create ring DMA tag.\n"); 268 return (1); 269 } 270 271 error = bus_dmamap_create(sc->buf_tag, 0, 272 &sc->buf_map); 273 if (error != 0) { 274 device_printf(sc->dev, 275 "could not create TX buffer DMA map.\n"); 276 return (1); 277 } 278 279 return (0); 280 } 281 282 static void 283 dwmmc_cmd_done(struct dwmmc_softc *sc) 284 { 285 struct mmc_command *cmd; 286 287 cmd = sc->curcmd; 288 if (cmd == NULL) 289 return; 290 291 if (cmd->flags & MMC_RSP_PRESENT) { 292 if (cmd->flags & MMC_RSP_136) { 293 cmd->resp[3] = READ4(sc, SDMMC_RESP0); 294 cmd->resp[2] = READ4(sc, SDMMC_RESP1); 295 cmd->resp[1] = READ4(sc, SDMMC_RESP2); 296 cmd->resp[0] = READ4(sc, SDMMC_RESP3); 297 } else { 298 cmd->resp[3] = 0; 299 cmd->resp[2] = 0; 300 cmd->resp[1] = 0; 301 cmd->resp[0] = READ4(sc, SDMMC_RESP0); 302 } 303 } 304 } 305 306 static void 307 dwmmc_tasklet(struct dwmmc_softc *sc) 308 { 309 struct mmc_command *cmd; 310 311 cmd = sc->curcmd; 312 if (cmd == NULL) 313 return; 314 315 if (!sc->cmd_done) 316 return; 317 318 if (cmd->error != MMC_ERR_NONE || !cmd->data) { 319 dwmmc_next_operation(sc); 320 } else if (cmd->data && sc->dto_rcvd) { 321 if ((cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK || 322 cmd->opcode == MMC_READ_MULTIPLE_BLOCK) && 323 sc->use_auto_stop) { 324 if (sc->acd_rcvd) 325 dwmmc_next_operation(sc); 326 } else { 327 dwmmc_next_operation(sc); 328 } 329 } 330 } 331 332 static void 333 dwmmc_intr(void *arg) 334 { 335 struct mmc_command *cmd; 336 struct dwmmc_softc *sc; 337 uint32_t reg; 338 339 sc = arg; 340 341 DWMMC_LOCK(sc); 342 343 cmd = sc->curcmd; 344 345 /* First handle SDMMC controller interrupts */ 346 reg = READ4(sc, SDMMC_MINTSTS); 347 if (reg) { 348 dprintf("%s 0x%08x\n", __func__, reg); 349 350 if (reg & DWMMC_CMD_ERR_FLAGS) { 351 WRITE4(sc, SDMMC_RINTSTS, DWMMC_CMD_ERR_FLAGS); 352 dprintf("cmd err 0x%08x cmd 0x%08x\n", 353 reg, cmd->opcode); 354 cmd->error = MMC_ERR_TIMEOUT; 355 } 356 357 if (reg & DWMMC_DATA_ERR_FLAGS) { 358 WRITE4(sc, SDMMC_RINTSTS, DWMMC_DATA_ERR_FLAGS); 359 dprintf("data err 0x%08x cmd 0x%08x\n", 360 reg, cmd->opcode); 361 cmd->error = MMC_ERR_FAILED; 362 if (!sc->use_pio) { 363 dma_done(sc, cmd); 364 dma_stop(sc); 365 } 366 } 367 368 if (reg & SDMMC_INTMASK_CMD_DONE) { 369 dwmmc_cmd_done(sc); 370 sc->cmd_done = 1; 371 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_CMD_DONE); 372 } 373 374 if (reg & SDMMC_INTMASK_ACD) { 375 sc->acd_rcvd = 1; 376 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_ACD); 377 } 378 379 if (reg & SDMMC_INTMASK_DTO) { 380 sc->dto_rcvd = 1; 381 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_DTO); 382 } 383 384 if (reg & SDMMC_INTMASK_CD) { 385 /* XXX: Handle card detect */ 386 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_CD); 387 } 388 } 389 390 if (sc->use_pio) { 391 if (reg & (SDMMC_INTMASK_RXDR|SDMMC_INTMASK_DTO)) { 392 pio_read(sc, cmd); 393 } 394 if (reg & (SDMMC_INTMASK_TXDR|SDMMC_INTMASK_DTO)) { 395 pio_write(sc, cmd); 396 } 397 } else { 398 /* Now handle DMA interrupts */ 399 reg = READ4(sc, SDMMC_IDSTS); 400 if (reg) { 401 dprintf("dma intr 0x%08x\n", reg); 402 if (reg & (SDMMC_IDINTEN_TI | SDMMC_IDINTEN_RI)) { 403 WRITE4(sc, SDMMC_IDSTS, (SDMMC_IDINTEN_TI | 404 SDMMC_IDINTEN_RI)); 405 WRITE4(sc, SDMMC_IDSTS, SDMMC_IDINTEN_NI); 406 dma_done(sc, cmd); 407 } 408 } 409 } 410 411 dwmmc_tasklet(sc); 412 413 DWMMC_UNLOCK(sc); 414 } 415 416 static int 417 parse_fdt(struct dwmmc_softc *sc) 418 { 419 pcell_t dts_value[3]; 420 phandle_t node; 421 int len; 422 423 if ((node = ofw_bus_get_node(sc->dev)) == -1) 424 return (ENXIO); 425 426 /* fifo-depth */ 427 if ((len = OF_getproplen(node, "fifo-depth")) > 0) { 428 OF_getencprop(node, "fifo-depth", dts_value, len); 429 sc->fifo_depth = dts_value[0]; 430 } 431 432 /* num-slots */ 433 sc->num_slots = 1; 434 if ((len = OF_getproplen(node, "num-slots")) > 0) { 435 OF_getencprop(node, "num-slots", dts_value, len); 436 sc->num_slots = dts_value[0]; 437 } 438 439 /* 440 * We need some platform-specific code to know 441 * what the clock is supplied for our device. 442 * For now rely on the value specified in FDT. 443 */ 444 if (sc->bus_hz == 0) { 445 if ((len = OF_getproplen(node, "bus-frequency")) <= 0) 446 return (ENXIO); 447 OF_getencprop(node, "bus-frequency", dts_value, len); 448 sc->bus_hz = dts_value[0]; 449 } 450 451 /* 452 * Platform-specific stuff 453 * XXX: Move to separate file 454 */ 455 456 if ((sc->hwtype & HWTYPE_MASK) != HWTYPE_EXYNOS) 457 return (0); 458 459 if ((len = OF_getproplen(node, "samsung,dw-mshc-ciu-div")) <= 0) 460 return (ENXIO); 461 OF_getencprop(node, "samsung,dw-mshc-ciu-div", dts_value, len); 462 sc->sdr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT); 463 sc->ddr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT); 464 465 if ((len = OF_getproplen(node, "samsung,dw-mshc-sdr-timing")) <= 0) 466 return (ENXIO); 467 OF_getencprop(node, "samsung,dw-mshc-sdr-timing", dts_value, len); 468 sc->sdr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) | 469 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT)); 470 471 if ((len = OF_getproplen(node, "samsung,dw-mshc-ddr-timing")) <= 0) 472 return (ENXIO); 473 OF_getencprop(node, "samsung,dw-mshc-ddr-timing", dts_value, len); 474 sc->ddr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) | 475 (dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT)); 476 477 return (0); 478 } 479 480 static int 481 dwmmc_probe(device_t dev) 482 { 483 uintptr_t hwtype; 484 485 if (!ofw_bus_status_okay(dev)) 486 return (ENXIO); 487 488 hwtype = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 489 if (hwtype == HWTYPE_NONE) 490 return (ENXIO); 491 492 device_set_desc(dev, "Synopsys DesignWare Mobile " 493 "Storage Host Controller"); 494 return (BUS_PROBE_DEFAULT); 495 } 496 497 int 498 dwmmc_attach(device_t dev) 499 { 500 struct dwmmc_softc *sc; 501 int error; 502 int slot; 503 504 sc = device_get_softc(dev); 505 506 sc->dev = dev; 507 if (sc->hwtype == HWTYPE_NONE) { 508 sc->hwtype = 509 ofw_bus_search_compatible(dev, compat_data)->ocd_data; 510 } 511 512 /* Why not to use Auto Stop? It save a hundred of irq per second */ 513 sc->use_auto_stop = 1; 514 515 error = parse_fdt(sc); 516 if (error != 0) { 517 device_printf(dev, "Can't get FDT property.\n"); 518 return (ENXIO); 519 } 520 521 DWMMC_LOCK_INIT(sc); 522 523 if (bus_alloc_resources(dev, dwmmc_spec, sc->res)) { 524 device_printf(dev, "could not allocate resources\n"); 525 return (ENXIO); 526 } 527 528 /* Setup interrupt handler. */ 529 error = bus_setup_intr(dev, sc->res[1], INTR_TYPE_NET | INTR_MPSAFE, 530 NULL, dwmmc_intr, sc, &sc->intr_cookie); 531 if (error != 0) { 532 device_printf(dev, "could not setup interrupt handler.\n"); 533 return (ENXIO); 534 } 535 536 device_printf(dev, "Hardware version ID is %04x\n", 537 READ4(sc, SDMMC_VERID) & 0xffff); 538 539 if (sc->desc_count == 0) 540 sc->desc_count = DESC_MAX; 541 542 if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_ROCKCHIP) { 543 sc->use_pio = 1; 544 sc->pwren_inverted = 1; 545 } else if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_EXYNOS) { 546 WRITE4(sc, EMMCP_MPSBEGIN0, 0); 547 WRITE4(sc, EMMCP_SEND0, 0); 548 WRITE4(sc, EMMCP_CTRL0, (MPSCTRL_SECURE_READ_BIT | 549 MPSCTRL_SECURE_WRITE_BIT | 550 MPSCTRL_NON_SECURE_READ_BIT | 551 MPSCTRL_NON_SECURE_WRITE_BIT | 552 MPSCTRL_VALID)); 553 } 554 555 /* XXX: we support operation for slot index 0 only */ 556 slot = 0; 557 if (sc->pwren_inverted) { 558 WRITE4(sc, SDMMC_PWREN, (0 << slot)); 559 } else { 560 WRITE4(sc, SDMMC_PWREN, (1 << slot)); 561 } 562 563 /* Reset all */ 564 if (dwmmc_ctrl_reset(sc, (SDMMC_CTRL_RESET | 565 SDMMC_CTRL_FIFO_RESET | 566 SDMMC_CTRL_DMA_RESET))) 567 return (ENXIO); 568 569 dwmmc_setup_bus(sc, sc->host.f_min); 570 571 if (sc->fifo_depth == 0) { 572 sc->fifo_depth = 1 + 573 ((READ4(sc, SDMMC_FIFOTH) >> SDMMC_FIFOTH_RXWMARK_S) & 0xfff); 574 device_printf(dev, "No fifo-depth, using FIFOTH %x\n", 575 sc->fifo_depth); 576 } 577 578 if (!sc->use_pio) { 579 if (dma_setup(sc)) 580 return (ENXIO); 581 582 /* Install desc base */ 583 WRITE4(sc, SDMMC_DBADDR, sc->desc_ring_paddr); 584 585 /* Enable DMA interrupts */ 586 WRITE4(sc, SDMMC_IDSTS, SDMMC_IDINTEN_MASK); 587 WRITE4(sc, SDMMC_IDINTEN, (SDMMC_IDINTEN_NI | 588 SDMMC_IDINTEN_RI | 589 SDMMC_IDINTEN_TI)); 590 } 591 592 /* Clear and disable interrups for a while */ 593 WRITE4(sc, SDMMC_RINTSTS, 0xffffffff); 594 WRITE4(sc, SDMMC_INTMASK, 0); 595 596 /* Maximum timeout */ 597 WRITE4(sc, SDMMC_TMOUT, 0xffffffff); 598 599 /* Enable interrupts */ 600 WRITE4(sc, SDMMC_RINTSTS, 0xffffffff); 601 WRITE4(sc, SDMMC_INTMASK, (SDMMC_INTMASK_CMD_DONE | 602 SDMMC_INTMASK_DTO | 603 SDMMC_INTMASK_ACD | 604 SDMMC_INTMASK_TXDR | 605 SDMMC_INTMASK_RXDR | 606 DWMMC_ERR_FLAGS | 607 SDMMC_INTMASK_CD)); 608 WRITE4(sc, SDMMC_CTRL, SDMMC_CTRL_INT_ENABLE); 609 610 sc->host.f_min = 400000; 611 sc->host.f_max = min(200000000, sc->bus_hz); 612 sc->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; 613 sc->host.caps = MMC_CAP_4_BIT_DATA; 614 615 device_add_child(dev, "mmc", -1); 616 return (bus_generic_attach(dev)); 617 } 618 619 static int 620 dwmmc_setup_bus(struct dwmmc_softc *sc, int freq) 621 { 622 int tout; 623 int div; 624 625 if (freq == 0) { 626 WRITE4(sc, SDMMC_CLKENA, 0); 627 WRITE4(sc, SDMMC_CMD, (SDMMC_CMD_WAIT_PRVDATA | 628 SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START)); 629 630 tout = 1000; 631 do { 632 if (tout-- < 0) { 633 device_printf(sc->dev, "Failed update clk\n"); 634 return (1); 635 } 636 } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); 637 638 return (0); 639 } 640 641 WRITE4(sc, SDMMC_CLKENA, 0); 642 WRITE4(sc, SDMMC_CLKSRC, 0); 643 644 div = (sc->bus_hz != freq) ? DIV_ROUND_UP(sc->bus_hz, 2 * freq) : 0; 645 646 WRITE4(sc, SDMMC_CLKDIV, div); 647 WRITE4(sc, SDMMC_CMD, (SDMMC_CMD_WAIT_PRVDATA | 648 SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START)); 649 650 tout = 1000; 651 do { 652 if (tout-- < 0) { 653 device_printf(sc->dev, "Failed to update clk"); 654 return (1); 655 } 656 } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); 657 658 WRITE4(sc, SDMMC_CLKENA, (SDMMC_CLKENA_CCLK_EN | SDMMC_CLKENA_LP)); 659 WRITE4(sc, SDMMC_CMD, SDMMC_CMD_WAIT_PRVDATA | 660 SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START); 661 662 tout = 1000; 663 do { 664 if (tout-- < 0) { 665 device_printf(sc->dev, "Failed to enable clk\n"); 666 return (1); 667 } 668 } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); 669 670 return (0); 671 } 672 673 static int 674 dwmmc_update_ios(device_t brdev, device_t reqdev) 675 { 676 struct dwmmc_softc *sc; 677 struct mmc_ios *ios; 678 679 sc = device_get_softc(brdev); 680 ios = &sc->host.ios; 681 682 dprintf("Setting up clk %u bus_width %d\n", 683 ios->clock, ios->bus_width); 684 685 dwmmc_setup_bus(sc, ios->clock); 686 687 if (ios->bus_width == bus_width_8) 688 WRITE4(sc, SDMMC_CTYPE, SDMMC_CTYPE_8BIT); 689 else if (ios->bus_width == bus_width_4) 690 WRITE4(sc, SDMMC_CTYPE, SDMMC_CTYPE_4BIT); 691 else 692 WRITE4(sc, SDMMC_CTYPE, 0); 693 694 if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_EXYNOS) { 695 /* XXX: take care about DDR or SDR use here */ 696 WRITE4(sc, SDMMC_CLKSEL, sc->sdr_timing); 697 } 698 699 /* 700 * XXX: take care about DDR bit 701 * 702 * reg = READ4(sc, SDMMC_UHS_REG); 703 * reg |= (SDMMC_UHS_REG_DDR); 704 * WRITE4(sc, SDMMC_UHS_REG, reg); 705 */ 706 707 return (0); 708 } 709 710 static int 711 dma_done(struct dwmmc_softc *sc, struct mmc_command *cmd) 712 { 713 struct mmc_data *data; 714 715 data = cmd->data; 716 717 if (data->flags & MMC_DATA_WRITE) 718 bus_dmamap_sync(sc->buf_tag, sc->buf_map, 719 BUS_DMASYNC_POSTWRITE); 720 else 721 bus_dmamap_sync(sc->buf_tag, sc->buf_map, 722 BUS_DMASYNC_POSTREAD); 723 724 bus_dmamap_sync(sc->desc_tag, sc->desc_map, 725 BUS_DMASYNC_POSTWRITE); 726 727 bus_dmamap_unload(sc->buf_tag, sc->buf_map); 728 729 return (0); 730 } 731 732 static int 733 dma_stop(struct dwmmc_softc *sc) 734 { 735 int reg; 736 737 reg = READ4(sc, SDMMC_CTRL); 738 reg &= ~(SDMMC_CTRL_USE_IDMAC); 739 reg |= (SDMMC_CTRL_DMA_RESET); 740 WRITE4(sc, SDMMC_CTRL, reg); 741 742 reg = READ4(sc, SDMMC_BMOD); 743 reg &= ~(SDMMC_BMOD_DE | SDMMC_BMOD_FB); 744 reg |= (SDMMC_BMOD_SWR); 745 WRITE4(sc, SDMMC_BMOD, reg); 746 747 return (0); 748 } 749 750 static int 751 dma_prepare(struct dwmmc_softc *sc, struct mmc_command *cmd) 752 { 753 struct mmc_data *data; 754 int err; 755 int reg; 756 757 data = cmd->data; 758 759 reg = READ4(sc, SDMMC_INTMASK); 760 reg &= ~(SDMMC_INTMASK_TXDR | SDMMC_INTMASK_RXDR); 761 WRITE4(sc, SDMMC_INTMASK, reg); 762 763 err = bus_dmamap_load(sc->buf_tag, sc->buf_map, 764 data->data, data->len, dwmmc_ring_setup, 765 sc, BUS_DMA_NOWAIT); 766 if (err != 0) 767 panic("dmamap_load failed\n"); 768 769 /* Ensure the device can see the desc */ 770 bus_dmamap_sync(sc->desc_tag, sc->desc_map, 771 BUS_DMASYNC_PREWRITE); 772 773 if (data->flags & MMC_DATA_WRITE) 774 bus_dmamap_sync(sc->buf_tag, sc->buf_map, 775 BUS_DMASYNC_PREWRITE); 776 else 777 bus_dmamap_sync(sc->buf_tag, sc->buf_map, 778 BUS_DMASYNC_PREREAD); 779 780 reg = (DEF_MSIZE << SDMMC_FIFOTH_MSIZE_S); 781 reg |= ((sc->fifo_depth / 2) - 1) << SDMMC_FIFOTH_RXWMARK_S; 782 reg |= (sc->fifo_depth / 2) << SDMMC_FIFOTH_TXWMARK_S; 783 784 WRITE4(sc, SDMMC_FIFOTH, reg); 785 wmb(); 786 787 reg = READ4(sc, SDMMC_CTRL); 788 reg |= (SDMMC_CTRL_USE_IDMAC | SDMMC_CTRL_DMA_ENABLE); 789 WRITE4(sc, SDMMC_CTRL, reg); 790 wmb(); 791 792 reg = READ4(sc, SDMMC_BMOD); 793 reg |= (SDMMC_BMOD_DE | SDMMC_BMOD_FB); 794 WRITE4(sc, SDMMC_BMOD, reg); 795 796 /* Start */ 797 WRITE4(sc, SDMMC_PLDMND, 1); 798 799 return (0); 800 } 801 802 static int 803 pio_prepare(struct dwmmc_softc *sc, struct mmc_command *cmd) 804 { 805 struct mmc_data *data; 806 int reg; 807 808 data = cmd->data; 809 data->xfer_len = 0; 810 811 reg = (DEF_MSIZE << SDMMC_FIFOTH_MSIZE_S); 812 reg |= ((sc->fifo_depth / 2) - 1) << SDMMC_FIFOTH_RXWMARK_S; 813 reg |= (sc->fifo_depth / 2) << SDMMC_FIFOTH_TXWMARK_S; 814 815 WRITE4(sc, SDMMC_FIFOTH, reg); 816 wmb(); 817 818 return (0); 819 } 820 821 static void 822 pio_read(struct dwmmc_softc *sc, struct mmc_command *cmd) 823 { 824 struct mmc_data *data; 825 uint32_t *p, status; 826 827 if (cmd == NULL || cmd->data == NULL) 828 return; 829 830 data = cmd->data; 831 if ((data->flags & MMC_DATA_READ) == 0) 832 return; 833 834 KASSERT((data->xfer_len & 3) == 0, ("xfer_len not aligned")); 835 p = (uint32_t *)data->data + (data->xfer_len >> 2); 836 837 while (data->xfer_len < data->len) { 838 status = READ4(sc, SDMMC_STATUS); 839 if (status & SDMMC_STATUS_FIFO_EMPTY) 840 break; 841 *p++ = READ4(sc, SDMMC_DATA); 842 data->xfer_len += 4; 843 } 844 845 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_RXDR); 846 } 847 848 static void 849 pio_write(struct dwmmc_softc *sc, struct mmc_command *cmd) 850 { 851 struct mmc_data *data; 852 uint32_t *p, status; 853 854 if (cmd == NULL || cmd->data == NULL) 855 return; 856 857 data = cmd->data; 858 if ((data->flags & MMC_DATA_WRITE) == 0) 859 return; 860 861 KASSERT((data->xfer_len & 3) == 0, ("xfer_len not aligned")); 862 p = (uint32_t *)data->data + (data->xfer_len >> 2); 863 864 while (data->xfer_len < data->len) { 865 status = READ4(sc, SDMMC_STATUS); 866 if (status & SDMMC_STATUS_FIFO_FULL) 867 break; 868 WRITE4(sc, SDMMC_DATA, *p++); 869 data->xfer_len += 4; 870 } 871 872 WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_TXDR); 873 } 874 875 static void 876 dwmmc_start_cmd(struct dwmmc_softc *sc, struct mmc_command *cmd) 877 { 878 struct mmc_data *data; 879 uint32_t blksz; 880 uint32_t cmdr; 881 882 sc->curcmd = cmd; 883 data = cmd->data; 884 885 if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_ROCKCHIP) 886 dwmmc_setup_bus(sc, sc->host.ios.clock); 887 888 /* XXX Upper layers don't always set this */ 889 cmd->mrq = sc->req; 890 891 /* Begin setting up command register. */ 892 893 cmdr = cmd->opcode; 894 895 dprintf("cmd->opcode 0x%08x\n", cmd->opcode); 896 897 if (cmd->opcode == MMC_STOP_TRANSMISSION || 898 cmd->opcode == MMC_GO_IDLE_STATE || 899 cmd->opcode == MMC_GO_INACTIVE_STATE) 900 cmdr |= SDMMC_CMD_STOP_ABORT; 901 else if (cmd->opcode != MMC_SEND_STATUS && data) 902 cmdr |= SDMMC_CMD_WAIT_PRVDATA; 903 904 /* Set up response handling. */ 905 if (MMC_RSP(cmd->flags) != MMC_RSP_NONE) { 906 cmdr |= SDMMC_CMD_RESP_EXP; 907 if (cmd->flags & MMC_RSP_136) 908 cmdr |= SDMMC_CMD_RESP_LONG; 909 } 910 911 if (cmd->flags & MMC_RSP_CRC) 912 cmdr |= SDMMC_CMD_RESP_CRC; 913 914 /* 915 * XXX: Not all platforms want this. 916 */ 917 cmdr |= SDMMC_CMD_USE_HOLD_REG; 918 919 if ((sc->flags & CARD_INIT_DONE) == 0) { 920 sc->flags |= (CARD_INIT_DONE); 921 cmdr |= SDMMC_CMD_SEND_INIT; 922 } 923 924 if (data) { 925 if ((cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK || 926 cmd->opcode == MMC_READ_MULTIPLE_BLOCK) && 927 sc->use_auto_stop) 928 cmdr |= SDMMC_CMD_SEND_ASTOP; 929 930 cmdr |= SDMMC_CMD_DATA_EXP; 931 if (data->flags & MMC_DATA_STREAM) 932 cmdr |= SDMMC_CMD_MODE_STREAM; 933 if (data->flags & MMC_DATA_WRITE) 934 cmdr |= SDMMC_CMD_DATA_WRITE; 935 936 WRITE4(sc, SDMMC_TMOUT, 0xffffffff); 937 WRITE4(sc, SDMMC_BYTCNT, data->len); 938 blksz = (data->len < MMC_SECTOR_SIZE) ? \ 939 data->len : MMC_SECTOR_SIZE; 940 WRITE4(sc, SDMMC_BLKSIZ, blksz); 941 942 if (sc->use_pio) { 943 pio_prepare(sc, cmd); 944 } else { 945 dma_prepare(sc, cmd); 946 } 947 wmb(); 948 } 949 950 dprintf("cmdr 0x%08x\n", cmdr); 951 952 WRITE4(sc, SDMMC_CMDARG, cmd->arg); 953 wmb(); 954 WRITE4(sc, SDMMC_CMD, cmdr | SDMMC_CMD_START); 955 }; 956 957 static void 958 dwmmc_next_operation(struct dwmmc_softc *sc) 959 { 960 struct mmc_request *req; 961 962 req = sc->req; 963 if (req == NULL) 964 return; 965 966 sc->acd_rcvd = 0; 967 sc->dto_rcvd = 0; 968 sc->cmd_done = 0; 969 970 /* 971 * XXX: Wait until card is still busy. 972 * We do need this to prevent data timeouts, 973 * mostly caused by multi-block write command 974 * followed by single-read. 975 */ 976 while(READ4(sc, SDMMC_STATUS) & (SDMMC_STATUS_DATA_BUSY)) 977 continue; 978 979 if (sc->flags & PENDING_CMD) { 980 sc->flags &= ~PENDING_CMD; 981 dwmmc_start_cmd(sc, req->cmd); 982 return; 983 } else if (sc->flags & PENDING_STOP && !sc->use_auto_stop) { 984 sc->flags &= ~PENDING_STOP; 985 dwmmc_start_cmd(sc, req->stop); 986 return; 987 } 988 989 sc->req = NULL; 990 sc->curcmd = NULL; 991 req->done(req); 992 } 993 994 static int 995 dwmmc_request(device_t brdev, device_t reqdev, struct mmc_request *req) 996 { 997 struct dwmmc_softc *sc; 998 999 sc = device_get_softc(brdev); 1000 1001 dprintf("%s\n", __func__); 1002 1003 DWMMC_LOCK(sc); 1004 1005 if (sc->req != NULL) { 1006 DWMMC_UNLOCK(sc); 1007 return (EBUSY); 1008 } 1009 1010 sc->req = req; 1011 sc->flags |= PENDING_CMD; 1012 if (sc->req->stop) 1013 sc->flags |= PENDING_STOP; 1014 dwmmc_next_operation(sc); 1015 1016 DWMMC_UNLOCK(sc); 1017 return (0); 1018 } 1019 1020 static int 1021 dwmmc_get_ro(device_t brdev, device_t reqdev) 1022 { 1023 1024 dprintf("%s\n", __func__); 1025 1026 return (0); 1027 } 1028 1029 static int 1030 dwmmc_acquire_host(device_t brdev, device_t reqdev) 1031 { 1032 struct dwmmc_softc *sc; 1033 1034 sc = device_get_softc(brdev); 1035 1036 DWMMC_LOCK(sc); 1037 while (sc->bus_busy) 1038 msleep(sc, &sc->sc_mtx, PZERO, "dwmmcah", hz / 5); 1039 sc->bus_busy++; 1040 DWMMC_UNLOCK(sc); 1041 return (0); 1042 } 1043 1044 static int 1045 dwmmc_release_host(device_t brdev, device_t reqdev) 1046 { 1047 struct dwmmc_softc *sc; 1048 1049 sc = device_get_softc(brdev); 1050 1051 DWMMC_LOCK(sc); 1052 sc->bus_busy--; 1053 wakeup(sc); 1054 DWMMC_UNLOCK(sc); 1055 return (0); 1056 } 1057 1058 static int 1059 dwmmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) 1060 { 1061 struct dwmmc_softc *sc; 1062 1063 sc = device_get_softc(bus); 1064 1065 switch (which) { 1066 default: 1067 return (EINVAL); 1068 case MMCBR_IVAR_BUS_MODE: 1069 *(int *)result = sc->host.ios.bus_mode; 1070 break; 1071 case MMCBR_IVAR_BUS_WIDTH: 1072 *(int *)result = sc->host.ios.bus_width; 1073 break; 1074 case MMCBR_IVAR_CHIP_SELECT: 1075 *(int *)result = sc->host.ios.chip_select; 1076 break; 1077 case MMCBR_IVAR_CLOCK: 1078 *(int *)result = sc->host.ios.clock; 1079 break; 1080 case MMCBR_IVAR_F_MIN: 1081 *(int *)result = sc->host.f_min; 1082 break; 1083 case MMCBR_IVAR_F_MAX: 1084 *(int *)result = sc->host.f_max; 1085 break; 1086 case MMCBR_IVAR_HOST_OCR: 1087 *(int *)result = sc->host.host_ocr; 1088 break; 1089 case MMCBR_IVAR_MODE: 1090 *(int *)result = sc->host.mode; 1091 break; 1092 case MMCBR_IVAR_OCR: 1093 *(int *)result = sc->host.ocr; 1094 break; 1095 case MMCBR_IVAR_POWER_MODE: 1096 *(int *)result = sc->host.ios.power_mode; 1097 break; 1098 case MMCBR_IVAR_VDD: 1099 *(int *)result = sc->host.ios.vdd; 1100 break; 1101 case MMCBR_IVAR_CAPS: 1102 sc->host.caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA; 1103 *(int *)result = sc->host.caps; 1104 break; 1105 case MMCBR_IVAR_MAX_DATA: 1106 *(int *)result = sc->desc_count; 1107 } 1108 return (0); 1109 } 1110 1111 static int 1112 dwmmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1113 { 1114 struct dwmmc_softc *sc; 1115 1116 sc = device_get_softc(bus); 1117 1118 switch (which) { 1119 default: 1120 return (EINVAL); 1121 case MMCBR_IVAR_BUS_MODE: 1122 sc->host.ios.bus_mode = value; 1123 break; 1124 case MMCBR_IVAR_BUS_WIDTH: 1125 sc->host.ios.bus_width = value; 1126 break; 1127 case MMCBR_IVAR_CHIP_SELECT: 1128 sc->host.ios.chip_select = value; 1129 break; 1130 case MMCBR_IVAR_CLOCK: 1131 sc->host.ios.clock = value; 1132 break; 1133 case MMCBR_IVAR_MODE: 1134 sc->host.mode = value; 1135 break; 1136 case MMCBR_IVAR_OCR: 1137 sc->host.ocr = value; 1138 break; 1139 case MMCBR_IVAR_POWER_MODE: 1140 sc->host.ios.power_mode = value; 1141 break; 1142 case MMCBR_IVAR_VDD: 1143 sc->host.ios.vdd = value; 1144 break; 1145 /* These are read-only */ 1146 case MMCBR_IVAR_CAPS: 1147 case MMCBR_IVAR_HOST_OCR: 1148 case MMCBR_IVAR_F_MIN: 1149 case MMCBR_IVAR_F_MAX: 1150 case MMCBR_IVAR_MAX_DATA: 1151 return (EINVAL); 1152 } 1153 return (0); 1154 } 1155 1156 static device_method_t dwmmc_methods[] = { 1157 DEVMETHOD(device_probe, dwmmc_probe), 1158 DEVMETHOD(device_attach, dwmmc_attach), 1159 1160 /* Bus interface */ 1161 DEVMETHOD(bus_read_ivar, dwmmc_read_ivar), 1162 DEVMETHOD(bus_write_ivar, dwmmc_write_ivar), 1163 1164 /* mmcbr_if */ 1165 DEVMETHOD(mmcbr_update_ios, dwmmc_update_ios), 1166 DEVMETHOD(mmcbr_request, dwmmc_request), 1167 DEVMETHOD(mmcbr_get_ro, dwmmc_get_ro), 1168 DEVMETHOD(mmcbr_acquire_host, dwmmc_acquire_host), 1169 DEVMETHOD(mmcbr_release_host, dwmmc_release_host), 1170 1171 DEVMETHOD_END 1172 }; 1173 1174 driver_t dwmmc_driver = { 1175 "dwmmc", 1176 dwmmc_methods, 1177 sizeof(struct dwmmc_softc), 1178 }; 1179 1180 static devclass_t dwmmc_devclass; 1181 1182 DRIVER_MODULE(dwmmc, simplebus, dwmmc_driver, dwmmc_devclass, NULL, NULL); 1183 DRIVER_MODULE(dwmmc, ofwbus, dwmmc_driver, dwmmc_devclass, NULL, NULL); 1184 #ifndef MMCCAM 1185 MMC_DECLARE_BRIDGE(dwmmc); 1186 #endif 1187