1 /*- 2 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bio.h> 33 #include <sys/bus.h> 34 #include <sys/conf.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/kthread.h> 38 #include <sys/lock.h> 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <sys/queue.h> 43 #include <sys/resource.h> 44 #include <sys/rman.h> 45 #include <sys/sysctl.h> 46 #include <sys/taskqueue.h> 47 #include <sys/time.h> 48 #include <sys/timetc.h> 49 #include <sys/watchdog.h> 50 51 #include <sys/kdb.h> 52 53 #include <machine/bus.h> 54 #include <machine/cpu.h> 55 #include <machine/cpufunc.h> 56 #include <machine/resource.h> 57 #include <machine/intr.h> 58 59 #include <dev/fdt/fdt_common.h> 60 #include <dev/ofw/ofw_bus.h> 61 #include <dev/ofw/ofw_bus_subr.h> 62 63 #include <dev/mmc/bridge.h> 64 #include <dev/mmc/mmcreg.h> 65 #include <dev/mmc/mmcbrvar.h> 66 67 #include <dev/sdhci/sdhci.h> 68 #include "sdhci_if.h" 69 70 #include "bcm2835_dma.h" 71 #include "bcm2835_vcbus.h" 72 73 #define BCM2835_DEFAULT_SDHCI_FREQ 50 74 75 #define BCM_SDHCI_BUFFER_SIZE 512 76 77 #ifdef DEBUG 78 #define dprintf(fmt, args...) do { printf("%s(): ", __func__); \ 79 printf(fmt,##args); } while (0) 80 #else 81 #define dprintf(fmt, args...) 82 #endif 83 84 /* 85 * Arasan HC seems to have problem with Data CRC on lower frequencies. 86 * Use this tunable to cap initialization sequence frequency at higher 87 * value. Default is standard 400kHz 88 */ 89 static int bcm2835_sdhci_min_freq = 400000; 90 static int bcm2835_sdhci_hs = 1; 91 static int bcm2835_sdhci_pio_mode = 0; 92 93 TUNABLE_INT("hw.bcm2835.sdhci.min_freq", &bcm2835_sdhci_min_freq); 94 TUNABLE_INT("hw.bcm2835.sdhci.hs", &bcm2835_sdhci_hs); 95 TUNABLE_INT("hw.bcm2835.sdhci.pio_mode", &bcm2835_sdhci_pio_mode); 96 97 struct bcm_sdhci_dmamap_arg { 98 bus_addr_t sc_dma_busaddr; 99 }; 100 101 struct bcm_sdhci_softc { 102 device_t sc_dev; 103 struct mtx sc_mtx; 104 struct resource * sc_mem_res; 105 struct resource * sc_irq_res; 106 bus_space_tag_t sc_bst; 107 bus_space_handle_t sc_bsh; 108 void * sc_intrhand; 109 struct mmc_request * sc_req; 110 struct mmc_data * sc_data; 111 uint32_t sc_flags; 112 #define LPC_SD_FLAGS_IGNORECRC (1 << 0) 113 int sc_xfer_direction; 114 #define DIRECTION_READ 0 115 #define DIRECTION_WRITE 1 116 int sc_xfer_done; 117 int sc_bus_busy; 118 struct sdhci_slot sc_slot; 119 int sc_dma_inuse; 120 int sc_dma_ch; 121 bus_dma_tag_t sc_dma_tag; 122 bus_dmamap_t sc_dma_map; 123 vm_paddr_t sc_sdhci_buffer_phys; 124 }; 125 126 static int bcm_sdhci_probe(device_t); 127 static int bcm_sdhci_attach(device_t); 128 static int bcm_sdhci_detach(device_t); 129 static void bcm_sdhci_intr(void *); 130 131 static int bcm_sdhci_get_ro(device_t, device_t); 132 static void bcm_sdhci_dma_intr(int ch, void *arg); 133 134 #define bcm_sdhci_lock(_sc) \ 135 mtx_lock(&_sc->sc_mtx); 136 #define bcm_sdhci_unlock(_sc) \ 137 mtx_unlock(&_sc->sc_mtx); 138 139 static void 140 bcm_dmamap_cb(void *arg, bus_dma_segment_t *segs, 141 int nseg, int err) 142 { 143 bus_addr_t *addr; 144 145 if (err) 146 return; 147 148 addr = (bus_addr_t*)arg; 149 *addr = segs[0].ds_addr; 150 } 151 152 static int 153 bcm_sdhci_probe(device_t dev) 154 { 155 156 if (!ofw_bus_status_okay(dev)) 157 return (ENXIO); 158 159 if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-sdhci")) 160 return (ENXIO); 161 162 device_set_desc(dev, "Broadcom 2708 SDHCI controller"); 163 return (BUS_PROBE_DEFAULT); 164 } 165 166 static int 167 bcm_sdhci_attach(device_t dev) 168 { 169 struct bcm_sdhci_softc *sc = device_get_softc(dev); 170 int rid, err; 171 phandle_t node; 172 pcell_t cell; 173 int default_freq; 174 175 sc->sc_dev = dev; 176 sc->sc_req = NULL; 177 err = 0; 178 179 default_freq = BCM2835_DEFAULT_SDHCI_FREQ; 180 node = ofw_bus_get_node(sc->sc_dev); 181 if ((OF_getprop(node, "clock-frequency", &cell, sizeof(cell))) > 0) 182 default_freq = (int)fdt32_to_cpu(cell)/1000000; 183 184 dprintf("SDHCI frequency: %dMHz\n", default_freq); 185 186 mtx_init(&sc->sc_mtx, "bcm sdhci", "sdhci", MTX_DEF); 187 188 rid = 0; 189 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 190 RF_ACTIVE); 191 if (!sc->sc_mem_res) { 192 device_printf(dev, "cannot allocate memory window\n"); 193 err = ENXIO; 194 goto fail; 195 } 196 197 sc->sc_bst = rman_get_bustag(sc->sc_mem_res); 198 sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res); 199 200 rid = 0; 201 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 202 RF_ACTIVE); 203 if (!sc->sc_irq_res) { 204 device_printf(dev, "cannot allocate interrupt\n"); 205 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 206 err = ENXIO; 207 goto fail; 208 } 209 210 if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 211 NULL, bcm_sdhci_intr, sc, &sc->sc_intrhand)) 212 { 213 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 214 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); 215 device_printf(dev, "cannot setup interrupt handler\n"); 216 err = ENXIO; 217 goto fail; 218 } 219 220 if (!bcm2835_sdhci_pio_mode) 221 sc->sc_slot.opt = SDHCI_PLATFORM_TRANSFER; 222 223 sc->sc_slot.caps = SDHCI_CAN_VDD_330 | SDHCI_CAN_VDD_180; 224 if (bcm2835_sdhci_hs) 225 sc->sc_slot.caps |= SDHCI_CAN_DO_HISPD; 226 sc->sc_slot.caps |= (default_freq << SDHCI_CLOCK_BASE_SHIFT); 227 sc->sc_slot.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK 228 | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL 229 | SDHCI_QUIRK_MISSING_CAPS; 230 231 sdhci_init_slot(dev, &sc->sc_slot, 0); 232 233 sc->sc_dma_ch = bcm_dma_allocate(BCM_DMA_CH_FAST1); 234 if (sc->sc_dma_ch == BCM_DMA_CH_INVALID) 235 sc->sc_dma_ch = bcm_dma_allocate(BCM_DMA_CH_FAST2); 236 if (sc->sc_dma_ch == BCM_DMA_CH_INVALID) 237 sc->sc_dma_ch = bcm_dma_allocate(BCM_DMA_CH_ANY); 238 if (sc->sc_dma_ch == BCM_DMA_CH_INVALID) 239 goto fail; 240 241 bcm_dma_setup_intr(sc->sc_dma_ch, bcm_sdhci_dma_intr, sc); 242 243 /* Allocate bus_dma resources. */ 244 err = bus_dma_tag_create(bus_get_dma_tag(dev), 245 1, 0, BUS_SPACE_MAXADDR_32BIT, 246 BUS_SPACE_MAXADDR, NULL, NULL, 247 BCM_SDHCI_BUFFER_SIZE, 1, BCM_SDHCI_BUFFER_SIZE, 248 BUS_DMA_ALLOCNOW, NULL, NULL, 249 &sc->sc_dma_tag); 250 251 if (err) { 252 device_printf(dev, "failed allocate DMA tag"); 253 goto fail; 254 } 255 256 err = bus_dmamap_create(sc->sc_dma_tag, 0, &sc->sc_dma_map); 257 if (err) { 258 device_printf(dev, "bus_dmamap_create failed\n"); 259 goto fail; 260 } 261 262 sc->sc_sdhci_buffer_phys = BUS_SPACE_PHYSADDR(sc->sc_mem_res, 263 SDHCI_BUFFER); 264 265 bus_generic_probe(dev); 266 bus_generic_attach(dev); 267 268 sdhci_start_slot(&sc->sc_slot); 269 270 return (0); 271 272 fail: 273 if (sc->sc_intrhand) 274 bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intrhand); 275 if (sc->sc_irq_res) 276 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); 277 if (sc->sc_mem_res) 278 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 279 280 return (err); 281 } 282 283 static int 284 bcm_sdhci_detach(device_t dev) 285 { 286 287 return (EBUSY); 288 } 289 290 static void 291 bcm_sdhci_intr(void *arg) 292 { 293 struct bcm_sdhci_softc *sc = arg; 294 295 sdhci_generic_intr(&sc->sc_slot); 296 } 297 298 static int 299 bcm_sdhci_get_ro(device_t bus, device_t child) 300 { 301 302 return (0); 303 } 304 305 static inline uint32_t 306 RD4(struct bcm_sdhci_softc *sc, bus_size_t off) 307 { 308 uint32_t val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off); 309 return val; 310 } 311 312 static inline void 313 WR4(struct bcm_sdhci_softc *sc, bus_size_t off, uint32_t val) 314 { 315 bus_space_write_4(sc->sc_bst, sc->sc_bsh, off, val); 316 317 if ((off != SDHCI_BUFFER && off != SDHCI_INT_STATUS && off != SDHCI_CLOCK_CONTROL)) 318 { 319 int timeout = 100000; 320 while (val != bus_space_read_4(sc->sc_bst, sc->sc_bsh, off) 321 && --timeout > 0) 322 continue; 323 324 if (timeout <= 0) 325 printf("sdhci_brcm: writing 0x%X to reg 0x%X " 326 "always gives 0x%X\n", 327 val, (uint32_t)off, 328 bus_space_read_4(sc->sc_bst, sc->sc_bsh, off)); 329 } 330 } 331 332 static uint8_t 333 bcm_sdhci_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off) 334 { 335 struct bcm_sdhci_softc *sc = device_get_softc(dev); 336 uint32_t val = RD4(sc, off & ~3); 337 338 return ((val >> (off & 3)*8) & 0xff); 339 } 340 341 static uint16_t 342 bcm_sdhci_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off) 343 { 344 struct bcm_sdhci_softc *sc = device_get_softc(dev); 345 uint32_t val = RD4(sc, off & ~3); 346 347 return ((val >> (off & 3)*8) & 0xffff); 348 } 349 350 static uint32_t 351 bcm_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) 352 { 353 struct bcm_sdhci_softc *sc = device_get_softc(dev); 354 355 return RD4(sc, off); 356 } 357 358 static void 359 bcm_sdhci_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 360 uint32_t *data, bus_size_t count) 361 { 362 struct bcm_sdhci_softc *sc = device_get_softc(dev); 363 364 bus_space_read_multi_4(sc->sc_bst, sc->sc_bsh, off, data, count); 365 } 366 367 static void 368 bcm_sdhci_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint8_t val) 369 { 370 struct bcm_sdhci_softc *sc = device_get_softc(dev); 371 uint32_t val32 = RD4(sc, off & ~3); 372 val32 &= ~(0xff << (off & 3)*8); 373 val32 |= (val << (off & 3)*8); 374 WR4(sc, off & ~3, val32); 375 } 376 377 static void 378 bcm_sdhci_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint16_t val) 379 { 380 struct bcm_sdhci_softc *sc = device_get_softc(dev); 381 static uint32_t cmd_and_trandfer_mode; 382 uint32_t val32; 383 if (off == SDHCI_COMMAND_FLAGS) 384 val32 = cmd_and_trandfer_mode; 385 else 386 val32 = RD4(sc, off & ~3); 387 val32 &= ~(0xffff << (off & 3)*8); 388 val32 |= (val << (off & 3)*8); 389 if (off == SDHCI_TRANSFER_MODE) 390 cmd_and_trandfer_mode = val32; 391 else 392 WR4(sc, off & ~3, val32); 393 } 394 395 static void 396 bcm_sdhci_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint32_t val) 397 { 398 struct bcm_sdhci_softc *sc = device_get_softc(dev); 399 WR4(sc, off, val); 400 } 401 402 static void 403 bcm_sdhci_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 404 uint32_t *data, bus_size_t count) 405 { 406 struct bcm_sdhci_softc *sc = device_get_softc(dev); 407 408 bus_space_write_multi_4(sc->sc_bst, sc->sc_bsh, off, data, count); 409 } 410 411 static uint32_t 412 bcm_sdhci_min_freq(device_t dev, struct sdhci_slot *slot) 413 { 414 415 return bcm2835_sdhci_min_freq; 416 } 417 418 static void 419 bcm_sdhci_dma_intr(int ch, void *arg) 420 { 421 struct bcm_sdhci_softc *sc = (struct bcm_sdhci_softc *)arg; 422 struct sdhci_slot *slot = &sc->sc_slot; 423 uint32_t reg, mask; 424 bus_addr_t pmem; 425 vm_paddr_t pdst, psrc; 426 size_t len; 427 int left, sync_op; 428 429 mtx_lock(&slot->mtx); 430 431 len = bcm_dma_length(sc->sc_dma_ch); 432 if (slot->curcmd->data->flags & MMC_DATA_READ) { 433 sync_op = BUS_DMASYNC_POSTREAD; 434 mask = SDHCI_INT_DATA_AVAIL; 435 } else { 436 sync_op = BUS_DMASYNC_POSTWRITE; 437 mask = SDHCI_INT_SPACE_AVAIL; 438 } 439 bus_dmamap_sync(sc->sc_dma_tag, sc->sc_dma_map, sync_op); 440 bus_dmamap_unload(sc->sc_dma_tag, sc->sc_dma_map); 441 442 slot->offset += len; 443 sc->sc_dma_inuse = 0; 444 445 left = min(BCM_SDHCI_BUFFER_SIZE, 446 slot->curcmd->data->len - slot->offset); 447 448 /* DATA END? */ 449 reg = bcm_sdhci_read_4(slot->bus, slot, SDHCI_INT_STATUS); 450 451 if (reg & SDHCI_INT_DATA_END) { 452 /* ACK for all outstanding interrupts */ 453 bcm_sdhci_write_4(slot->bus, slot, SDHCI_INT_STATUS, reg); 454 455 /* enable INT */ 456 slot->intmask |= SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL 457 | SDHCI_INT_DATA_END; 458 bcm_sdhci_write_4(slot->bus, slot, SDHCI_SIGNAL_ENABLE, 459 slot->intmask); 460 461 /* finish this data */ 462 sdhci_finish_data(slot); 463 } 464 else { 465 /* already available? */ 466 if (reg & mask) { 467 sc->sc_dma_inuse = 1; 468 469 /* ACK for DATA_AVAIL or SPACE_AVAIL */ 470 bcm_sdhci_write_4(slot->bus, slot, 471 SDHCI_INT_STATUS, mask); 472 473 /* continue next DMA transfer */ 474 bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, 475 (uint8_t *)slot->curcmd->data->data + 476 slot->offset, left, bcm_dmamap_cb, &pmem, 0); 477 if (slot->curcmd->data->flags & MMC_DATA_READ) { 478 psrc = sc->sc_sdhci_buffer_phys; 479 pdst = pmem; 480 sync_op = BUS_DMASYNC_PREREAD; 481 } else { 482 psrc = pmem; 483 pdst = sc->sc_sdhci_buffer_phys; 484 sync_op = BUS_DMASYNC_PREWRITE; 485 } 486 bus_dmamap_sync(sc->sc_dma_tag, sc->sc_dma_map, sync_op); 487 if (bcm_dma_start(sc->sc_dma_ch, psrc, pdst, left)) { 488 /* XXX stop xfer, other error recovery? */ 489 device_printf(sc->sc_dev, "failed DMA start\n"); 490 } 491 } else { 492 /* wait for next data by INT */ 493 494 /* enable INT */ 495 slot->intmask |= SDHCI_INT_DATA_AVAIL | 496 SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_END; 497 bcm_sdhci_write_4(slot->bus, slot, SDHCI_SIGNAL_ENABLE, 498 slot->intmask); 499 } 500 } 501 502 mtx_unlock(&slot->mtx); 503 } 504 505 static void 506 bcm_sdhci_read_dma(struct sdhci_slot *slot) 507 { 508 struct bcm_sdhci_softc *sc = device_get_softc(slot->bus); 509 size_t left; 510 bus_addr_t paddr; 511 512 if (sc->sc_dma_inuse) { 513 device_printf(sc->sc_dev, "DMA in use\n"); 514 return; 515 } 516 517 sc->sc_dma_inuse = 1; 518 519 left = min(BCM_SDHCI_BUFFER_SIZE, 520 slot->curcmd->data->len - slot->offset); 521 522 KASSERT((left & 3) == 0, 523 ("%s: len = %d, not word-aligned", __func__, left)); 524 525 bcm_dma_setup_src(sc->sc_dma_ch, BCM_DMA_DREQ_EMMC, 526 BCM_DMA_SAME_ADDR, BCM_DMA_32BIT); 527 bcm_dma_setup_dst(sc->sc_dma_ch, BCM_DMA_DREQ_NONE, 528 BCM_DMA_INC_ADDR, 529 (left & 0xf) ? BCM_DMA_32BIT : BCM_DMA_128BIT); 530 531 bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, 532 (uint8_t *)slot->curcmd->data->data + slot->offset, left, 533 bcm_dmamap_cb, &paddr, 0); 534 535 bus_dmamap_sync(sc->sc_dma_tag, sc->sc_dma_map, 536 BUS_DMASYNC_PREREAD); 537 538 /* DMA start */ 539 if (bcm_dma_start(sc->sc_dma_ch, sc->sc_sdhci_buffer_phys, 540 paddr, left) != 0) 541 device_printf(sc->sc_dev, "failed DMA start\n"); 542 } 543 544 static void 545 bcm_sdhci_write_dma(struct sdhci_slot *slot) 546 { 547 struct bcm_sdhci_softc *sc = device_get_softc(slot->bus); 548 size_t left; 549 bus_addr_t paddr; 550 551 if (sc->sc_dma_inuse) { 552 device_printf(sc->sc_dev, "DMA in use\n"); 553 return; 554 } 555 556 sc->sc_dma_inuse = 1; 557 558 left = min(BCM_SDHCI_BUFFER_SIZE, 559 slot->curcmd->data->len - slot->offset); 560 561 KASSERT((left & 3) == 0, 562 ("%s: len = %d, not word-aligned", __func__, left)); 563 564 bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, 565 (uint8_t *)slot->curcmd->data->data + slot->offset, left, 566 bcm_dmamap_cb, &paddr, 0); 567 568 bcm_dma_setup_src(sc->sc_dma_ch, BCM_DMA_DREQ_NONE, 569 BCM_DMA_INC_ADDR, 570 (left & 0xf) ? BCM_DMA_32BIT : BCM_DMA_128BIT); 571 bcm_dma_setup_dst(sc->sc_dma_ch, BCM_DMA_DREQ_EMMC, 572 BCM_DMA_SAME_ADDR, BCM_DMA_32BIT); 573 574 bus_dmamap_sync(sc->sc_dma_tag, sc->sc_dma_map, 575 BUS_DMASYNC_PREWRITE); 576 577 /* DMA start */ 578 if (bcm_dma_start(sc->sc_dma_ch, paddr, 579 sc->sc_sdhci_buffer_phys, left) != 0) 580 device_printf(sc->sc_dev, "failed DMA start\n"); 581 } 582 583 static int 584 bcm_sdhci_will_handle_transfer(device_t dev, struct sdhci_slot *slot) 585 { 586 size_t left; 587 588 /* 589 * Do not use DMA for transfers less than block size or with a length 590 * that is not a multiple of four. 591 */ 592 left = min(BCM_DMA_BLOCK_SIZE, 593 slot->curcmd->data->len - slot->offset); 594 if (left < BCM_DMA_BLOCK_SIZE) 595 return (0); 596 if (left & 0x03) 597 return (0); 598 599 return (1); 600 } 601 602 static void 603 bcm_sdhci_start_transfer(device_t dev, struct sdhci_slot *slot, 604 uint32_t *intmask) 605 { 606 607 /* Disable INT */ 608 slot->intmask &= ~(SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_END); 609 bcm_sdhci_write_4(dev, slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 610 611 /* DMA transfer FIFO 1KB */ 612 if (slot->curcmd->data->flags & MMC_DATA_READ) 613 bcm_sdhci_read_dma(slot); 614 else 615 bcm_sdhci_write_dma(slot); 616 } 617 618 static void 619 bcm_sdhci_finish_transfer(device_t dev, struct sdhci_slot *slot) 620 { 621 622 sdhci_finish_data(slot); 623 } 624 625 static device_method_t bcm_sdhci_methods[] = { 626 /* Device interface */ 627 DEVMETHOD(device_probe, bcm_sdhci_probe), 628 DEVMETHOD(device_attach, bcm_sdhci_attach), 629 DEVMETHOD(device_detach, bcm_sdhci_detach), 630 631 /* Bus interface */ 632 DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar), 633 DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar), 634 DEVMETHOD(bus_print_child, bus_generic_print_child), 635 636 /* MMC bridge interface */ 637 DEVMETHOD(mmcbr_update_ios, sdhci_generic_update_ios), 638 DEVMETHOD(mmcbr_request, sdhci_generic_request), 639 DEVMETHOD(mmcbr_get_ro, bcm_sdhci_get_ro), 640 DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host), 641 DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host), 642 643 DEVMETHOD(sdhci_min_freq, bcm_sdhci_min_freq), 644 /* Platform transfer methods */ 645 DEVMETHOD(sdhci_platform_will_handle, bcm_sdhci_will_handle_transfer), 646 DEVMETHOD(sdhci_platform_start_transfer, bcm_sdhci_start_transfer), 647 DEVMETHOD(sdhci_platform_finish_transfer, bcm_sdhci_finish_transfer), 648 /* SDHCI registers accessors */ 649 DEVMETHOD(sdhci_read_1, bcm_sdhci_read_1), 650 DEVMETHOD(sdhci_read_2, bcm_sdhci_read_2), 651 DEVMETHOD(sdhci_read_4, bcm_sdhci_read_4), 652 DEVMETHOD(sdhci_read_multi_4, bcm_sdhci_read_multi_4), 653 DEVMETHOD(sdhci_write_1, bcm_sdhci_write_1), 654 DEVMETHOD(sdhci_write_2, bcm_sdhci_write_2), 655 DEVMETHOD(sdhci_write_4, bcm_sdhci_write_4), 656 DEVMETHOD(sdhci_write_multi_4, bcm_sdhci_write_multi_4), 657 658 { 0, 0 } 659 }; 660 661 static devclass_t bcm_sdhci_devclass; 662 663 static driver_t bcm_sdhci_driver = { 664 "sdhci_bcm", 665 bcm_sdhci_methods, 666 sizeof(struct bcm_sdhci_softc), 667 }; 668 669 DRIVER_MODULE(sdhci_bcm, simplebus, bcm_sdhci_driver, bcm_sdhci_devclass, 0, 0); 670 MODULE_DEPEND(sdhci_bcm, sdhci, 1, 1, 1); 671