1 /*- 2 * Copyright (c) 2006 Bernd Walter. All rights reserved. 3 * Copyright (c) 2006 M. Warner Losh. 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 ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * Portions of this software may have been developed with reference to 26 * the SD Simplified Specification. The following disclaimer may apply: 27 * 28 * The following conditions apply to the release of the simplified 29 * specification ("Simplified Specification") by the SD Card Association and 30 * the SD Group. The Simplified Specification is a subset of the complete SD 31 * Specification which is owned by the SD Card Association and the SD 32 * Group. This Simplified Specification is provided on a non-confidential 33 * basis subject to the disclaimers below. Any implementation of the 34 * Simplified Specification may require a license from the SD Card 35 * Association, SD Group, SD-3C LLC or other third parties. 36 * 37 * Disclaimers: 38 * 39 * The information contained in the Simplified Specification is presented only 40 * as a standard specification for SD Cards and SD Host/Ancillary products and 41 * is provided "AS-IS" without any representations or warranties of any 42 * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD 43 * Card Association for any damages, any infringements of patents or other 44 * right of the SD Group, SD-3C LLC, the SD Card Association or any third 45 * parties, which may result from its use. No license is granted by 46 * implication, estoppel or otherwise under any patent or other rights of the 47 * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing 48 * herein shall be construed as an obligation by the SD Group, the SD-3C LLC 49 * or the SD Card Association to disclose or distribute any technical 50 * information, know-how or other confidential information to any third party. 51 */ 52 53 #include <sys/cdefs.h> 54 __FBSDID("$FreeBSD$"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/malloc.h> 60 #include <sys/lock.h> 61 #include <sys/module.h> 62 #include <sys/mutex.h> 63 #include <sys/bus.h> 64 #include <sys/endian.h> 65 66 #include <dev/mmc/mmcreg.h> 67 #include <dev/mmc/mmcbrvar.h> 68 #include <dev/mmc/mmcvar.h> 69 #include "mmcbr_if.h" 70 #include "mmcbus_if.h" 71 72 struct mmc_softc { 73 device_t dev; 74 struct mtx sc_mtx; 75 struct intr_config_hook config_intrhook; 76 device_t owner; 77 uint32_t last_rca; 78 }; 79 80 /* 81 * Per-card data 82 */ 83 struct mmc_ivars { 84 uint32_t raw_cid[4]; /* Raw bits of the CID */ 85 uint32_t raw_csd[4]; /* Raw bits of the CSD */ 86 uint32_t raw_scr[2]; /* Raw bits of the SCR */ 87 uint8_t raw_ext_csd[512]; /* Raw bits of the EXT_CSD */ 88 uint16_t rca; 89 enum mmc_card_mode mode; 90 struct mmc_cid cid; /* cid decoded */ 91 struct mmc_csd csd; /* csd decoded */ 92 struct mmc_scr scr; /* scr decoded */ 93 u_char read_only; /* True when the device is read-only */ 94 u_char bus_width; /* Bus width to use */ 95 u_char timing; /* Bus timing support */ 96 u_char high_cap; /* High Capacity card (block addressed) */ 97 uint32_t sec_count; /* Card capacity in 512byte blocks */ 98 uint32_t tran_speed; /* Max speed in normal mode */ 99 uint32_t hs_tran_speed; /* Max speed in high speed mode */ 100 }; 101 102 #define CMD_RETRIES 3 103 104 /* bus entry points */ 105 static int mmc_probe(device_t dev); 106 static int mmc_attach(device_t dev); 107 static int mmc_detach(device_t dev); 108 109 #define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 110 #define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 111 #define MMC_LOCK_INIT(_sc) \ 112 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 113 "mmc", MTX_DEF) 114 #define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 115 #define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 116 #define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 117 118 static int mmc_calculate_clock(struct mmc_softc *sc); 119 static void mmc_delayed_attach(void *); 120 static void mmc_power_down(struct mmc_softc *sc); 121 static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 122 int retries); 123 static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 124 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 125 static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 126 static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 127 static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 128 static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 129 static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 130 131 static void 132 mmc_ms_delay(int ms) 133 { 134 DELAY(1000 * ms); /* XXX BAD */ 135 } 136 137 static int 138 mmc_probe(device_t dev) 139 { 140 141 device_set_desc(dev, "MMC/SD bus"); 142 return (0); 143 } 144 145 static int 146 mmc_attach(device_t dev) 147 { 148 struct mmc_softc *sc; 149 150 sc = device_get_softc(dev); 151 sc->dev = dev; 152 MMC_LOCK_INIT(sc); 153 154 /* We'll probe and attach our children later, but before / mount */ 155 sc->config_intrhook.ich_func = mmc_delayed_attach; 156 sc->config_intrhook.ich_arg = sc; 157 if (config_intrhook_establish(&sc->config_intrhook) != 0) 158 device_printf(dev, "config_intrhook_establish failed\n"); 159 return (0); 160 } 161 162 static int 163 mmc_detach(device_t dev) 164 { 165 struct mmc_softc *sc = device_get_softc(dev); 166 device_t *kids; 167 int i, nkid; 168 169 /* kill children [ph33r]. -sorbo */ 170 if (device_get_children(sc->dev, &kids, &nkid) != 0) 171 return (0); 172 for (i = 0; i < nkid; i++) { 173 device_t kid = kids[i]; 174 void *ivar = device_get_ivars(kid); 175 176 device_detach(kid); 177 device_delete_child(sc->dev, kid); 178 free(ivar, M_DEVBUF); 179 } 180 free(kids, M_TEMP); 181 mmc_power_down(sc); 182 183 MMC_LOCK_DESTROY(sc); 184 185 return (0); 186 } 187 188 static int 189 mmc_acquire_bus(device_t busdev, device_t dev) 190 { 191 struct mmc_softc *sc; 192 struct mmc_ivars *ivar; 193 int err; 194 int rca; 195 196 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 197 if (err) 198 return (err); 199 sc = device_get_softc(busdev); 200 MMC_LOCK(sc); 201 if (sc->owner) 202 panic("mmc: host bridge didn't seralize us."); 203 sc->owner = dev; 204 MMC_UNLOCK(sc); 205 206 if (busdev != dev) { 207 /* 208 * Keep track of the last rca that we've selected. If 209 * we're asked to do it again, don't. We never 210 * unselect unless the bus code itself wants the mmc 211 * bus, and constantly reselecting causes problems. 212 */ 213 rca = mmc_get_rca(dev); 214 if (sc->last_rca != rca) { 215 mmc_select_card(sc, rca); 216 sc->last_rca = rca; 217 /* Prepare bus width for the new card. */ 218 ivar = device_get_ivars(dev); 219 if (bootverbose) { 220 device_printf(busdev, 221 "setting bus width to %d bits\n", 222 (ivar->bus_width == bus_width_4) ? 4 : 223 (ivar->bus_width == bus_width_8) ? 8 : 1); 224 } 225 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 226 mmcbr_set_bus_width(busdev, ivar->bus_width); 227 mmcbr_update_ios(busdev); 228 } 229 } else { 230 /* 231 * If there's a card selected, stand down. 232 */ 233 if (sc->last_rca != 0) { 234 mmc_select_card(sc, 0); 235 sc->last_rca = 0; 236 } 237 } 238 239 return (0); 240 } 241 242 static int 243 mmc_release_bus(device_t busdev, device_t dev) 244 { 245 struct mmc_softc *sc; 246 int err; 247 248 sc = device_get_softc(busdev); 249 250 MMC_LOCK(sc); 251 if (!sc->owner) 252 panic("mmc: releasing unowned bus."); 253 if (sc->owner != dev) 254 panic("mmc: you don't own the bus. game over."); 255 MMC_UNLOCK(sc); 256 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 257 if (err) 258 return (err); 259 MMC_LOCK(sc); 260 sc->owner = NULL; 261 MMC_UNLOCK(sc); 262 return (0); 263 } 264 265 static void 266 mmc_rescan_cards(struct mmc_softc *sc) 267 { 268 /* XXX: Look at the children and see if they respond to status */ 269 } 270 271 static uint32_t 272 mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 273 { 274 275 return (ocr & MMC_OCR_VOLTAGE); 276 } 277 278 static int 279 mmc_highest_voltage(uint32_t ocr) 280 { 281 int i; 282 283 for (i = 30; i >= 0; i--) 284 if (ocr & (1 << i)) 285 return (i); 286 return (-1); 287 } 288 289 static void 290 mmc_wakeup(struct mmc_request *req) 291 { 292 struct mmc_softc *sc; 293 294 /* printf("Wakeup for req %p done_data %p\n", req, req->done_data); */ 295 sc = (struct mmc_softc *)req->done_data; 296 MMC_LOCK(sc); 297 req->flags |= MMC_REQ_DONE; 298 wakeup(req); 299 MMC_UNLOCK(sc); 300 } 301 302 static int 303 mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 304 { 305 int err; 306 307 req->done = mmc_wakeup; 308 req->done_data = sc; 309 /* printf("Submitting request %p sc %p\n", req, sc); */ 310 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 311 MMC_LOCK(sc); 312 do { 313 err = msleep(req, &sc->sc_mtx, PZERO | PCATCH, "mmcreq", 314 hz / 10); 315 } while (!(req->flags & MMC_REQ_DONE) && err == EAGAIN); 316 /* printf("Request %p done with error %d\n", req, err); */ 317 MMC_UNLOCK(sc); 318 return (err); 319 } 320 321 static int 322 mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 323 { 324 struct mmc_softc *sc = device_get_softc(brdev); 325 326 return (mmc_wait_for_req(sc, req)); 327 } 328 329 static int 330 mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 331 { 332 struct mmc_request mreq; 333 334 memset(&mreq, 0, sizeof(mreq)); 335 memset(cmd->resp, 0, sizeof(cmd->resp)); 336 cmd->retries = retries; 337 mreq.cmd = cmd; 338 /* printf("CMD: %x ARG %x\n", cmd->opcode, cmd->arg); */ 339 mmc_wait_for_req(sc, &mreq); 340 return (cmd->error); 341 } 342 343 static int 344 mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 345 struct mmc_command *cmd, int retries) 346 { 347 struct mmc_command appcmd; 348 int err = MMC_ERR_NONE, i; 349 350 for (i = 0; i <= retries; i++) { 351 appcmd.opcode = MMC_APP_CMD; 352 appcmd.arg = rca << 16; 353 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 354 appcmd.data = NULL; 355 mmc_wait_for_cmd(sc, &appcmd, 0); 356 err = appcmd.error; 357 if (err != MMC_ERR_NONE) 358 continue; 359 if (!(appcmd.resp[0] & R1_APP_CMD)) 360 return MMC_ERR_FAILED; 361 mmc_wait_for_cmd(sc, cmd, 0); 362 err = cmd->error; 363 if (err == MMC_ERR_NONE) 364 break; 365 } 366 return (err); 367 } 368 369 static int 370 mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 371 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 372 { 373 struct mmc_command cmd; 374 int err; 375 376 memset(&cmd, 0, sizeof(cmd)); 377 cmd.opcode = opcode; 378 cmd.arg = arg; 379 cmd.flags = flags; 380 cmd.data = NULL; 381 err = mmc_wait_for_cmd(sc, &cmd, retries); 382 if (err) 383 return (err); 384 if (cmd.error) 385 return (cmd.error); 386 if (resp) { 387 if (flags & MMC_RSP_136) 388 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 389 else 390 *resp = cmd.resp[0]; 391 } 392 return (0); 393 } 394 395 static void 396 mmc_idle_cards(struct mmc_softc *sc) 397 { 398 device_t dev; 399 struct mmc_command cmd; 400 401 dev = sc->dev; 402 mmcbr_set_chip_select(dev, cs_high); 403 mmcbr_update_ios(dev); 404 mmc_ms_delay(1); 405 406 memset(&cmd, 0, sizeof(cmd)); 407 cmd.opcode = MMC_GO_IDLE_STATE; 408 cmd.arg = 0; 409 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 410 cmd.data = NULL; 411 mmc_wait_for_cmd(sc, &cmd, 0); 412 mmc_ms_delay(1); 413 414 mmcbr_set_chip_select(dev, cs_dontcare); 415 mmcbr_update_ios(dev); 416 mmc_ms_delay(1); 417 } 418 419 static int 420 mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 421 { 422 struct mmc_command cmd; 423 int err = MMC_ERR_NONE, i; 424 425 memset(&cmd, 0, sizeof(cmd)); 426 cmd.opcode = ACMD_SD_SEND_OP_COND; 427 cmd.arg = ocr; 428 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 429 cmd.data = NULL; 430 431 for (i = 0; i < 100; i++) { 432 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 433 if (err != MMC_ERR_NONE) 434 break; 435 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 436 (ocr & MMC_OCR_VOLTAGE) == 0) 437 break; 438 err = MMC_ERR_TIMEOUT; 439 mmc_ms_delay(10); 440 } 441 if (rocr && err == MMC_ERR_NONE) 442 *rocr = cmd.resp[0]; 443 return (err); 444 } 445 446 static int 447 mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 448 { 449 struct mmc_command cmd; 450 int err = MMC_ERR_NONE, i; 451 452 memset(&cmd, 0, sizeof(cmd)); 453 cmd.opcode = MMC_SEND_OP_COND; 454 cmd.arg = ocr; 455 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 456 cmd.data = NULL; 457 458 for (i = 0; i < 100; i++) { 459 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 460 if (err != MMC_ERR_NONE) 461 break; 462 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 463 (ocr & MMC_OCR_VOLTAGE) == 0) 464 break; 465 err = MMC_ERR_TIMEOUT; 466 mmc_ms_delay(10); 467 } 468 if (rocr && err == MMC_ERR_NONE) 469 *rocr = cmd.resp[0]; 470 return (err); 471 } 472 473 static int 474 mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 475 { 476 struct mmc_command cmd; 477 int err; 478 479 memset(&cmd, 0, sizeof(cmd)); 480 cmd.opcode = SD_SEND_IF_COND; 481 cmd.arg = (vhs << 8) + 0xAA; 482 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 483 cmd.data = NULL; 484 485 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 486 return (err); 487 } 488 489 static void 490 mmc_power_up(struct mmc_softc *sc) 491 { 492 device_t dev; 493 494 dev = sc->dev; 495 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 496 mmcbr_set_bus_mode(dev, opendrain); 497 mmcbr_set_chip_select(dev, cs_dontcare); 498 mmcbr_set_bus_width(dev, bus_width_1); 499 mmcbr_set_power_mode(dev, power_up); 500 mmcbr_set_clock(dev, 0); 501 mmcbr_update_ios(dev); 502 mmc_ms_delay(1); 503 504 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 505 mmcbr_set_timing(dev, bus_timing_normal); 506 mmcbr_set_power_mode(dev, power_on); 507 mmcbr_update_ios(dev); 508 mmc_ms_delay(2); 509 } 510 511 static void 512 mmc_power_down(struct mmc_softc *sc) 513 { 514 device_t dev = sc->dev; 515 516 mmcbr_set_bus_mode(dev, opendrain); 517 mmcbr_set_chip_select(dev, cs_dontcare); 518 mmcbr_set_bus_width(dev, bus_width_1); 519 mmcbr_set_power_mode(dev, power_off); 520 mmcbr_set_clock(dev, 0); 521 mmcbr_set_timing(dev, bus_timing_normal); 522 mmcbr_update_ios(dev); 523 } 524 525 static int 526 mmc_select_card(struct mmc_softc *sc, uint16_t rca) 527 { 528 int flags; 529 530 flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; 531 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16, 532 flags, NULL, CMD_RETRIES)); 533 } 534 535 static int 536 mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 537 { 538 struct mmc_command cmd; 539 int err; 540 541 cmd.opcode = MMC_SWITCH_FUNC; 542 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 543 (index << 16) | 544 (value << 8) | 545 set; 546 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 547 cmd.data = NULL; 548 err = mmc_wait_for_cmd(sc, &cmd, 0); 549 return (err); 550 } 551 552 static int 553 mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, uint8_t *res) 554 { 555 int err; 556 struct mmc_command cmd; 557 struct mmc_data data; 558 559 memset(&cmd, 0, sizeof(struct mmc_command)); 560 memset(&data, 0, sizeof(struct mmc_data)); 561 562 memset(res, 0, 64); 563 cmd.opcode = SD_SWITCH_FUNC; 564 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 565 cmd.arg = mode << 31; 566 cmd.arg |= 0x00FFFFFF; 567 cmd.arg &= ~(0xF << (grp * 4)); 568 cmd.arg |= value << (grp * 4); 569 cmd.data = &data; 570 571 data.data = res; 572 data.len = 64; 573 data.flags = MMC_DATA_READ; 574 575 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 576 return (err); 577 } 578 579 static int 580 mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 581 { 582 int err; 583 584 if (mmcbr_get_mode(sc->dev) == mode_sd) { 585 struct mmc_command cmd; 586 587 memset(&cmd, 0, sizeof(struct mmc_command)); 588 cmd.opcode = ACMD_SET_BUS_WIDTH; 589 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 590 switch (width) { 591 case bus_width_1: 592 cmd.arg = SD_BUS_WIDTH_1; 593 break; 594 case bus_width_4: 595 cmd.arg = SD_BUS_WIDTH_4; 596 break; 597 default: 598 return (MMC_ERR_INVALID); 599 } 600 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 601 } else { 602 uint8_t value; 603 604 switch (width) { 605 case bus_width_1: 606 value = EXT_CSD_BUS_WIDTH_1; 607 break; 608 case bus_width_4: 609 value = EXT_CSD_BUS_WIDTH_4; 610 break; 611 case bus_width_8: 612 value = EXT_CSD_BUS_WIDTH_8; 613 break; 614 default: 615 return (MMC_ERR_INVALID); 616 } 617 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, value); 618 } 619 return (err); 620 } 621 622 static int 623 mmc_set_timing(struct mmc_softc *sc, int timing) 624 { 625 int err; 626 uint8_t value; 627 628 switch (timing) { 629 case bus_timing_normal: 630 value = 0; 631 break; 632 case bus_timing_hs: 633 value = 1; 634 break; 635 default: 636 return (MMC_ERR_INVALID); 637 } 638 if (mmcbr_get_mode(sc->dev) == mode_sd) { 639 u_char switch_res[64]; 640 641 err = mmc_sd_switch(sc, 1, 0, value, switch_res); 642 } else { 643 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 644 EXT_CSD_HS_TIMING, value); 645 } 646 return (err); 647 } 648 649 static int 650 mmc_test_bus_width(struct mmc_softc *sc) 651 { 652 struct mmc_command cmd; 653 struct mmc_data data; 654 int err; 655 uint8_t buf[8]; 656 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 657 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 658 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 659 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 660 661 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 662 mmcbr_set_bus_width(sc->dev, bus_width_8); 663 mmcbr_update_ios(sc->dev); 664 665 cmd.opcode = MMC_BUSTEST_W; 666 cmd.arg = 0; 667 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 668 cmd.data = &data; 669 670 data.data = p8; 671 data.len = 8; 672 data.flags = MMC_DATA_WRITE; 673 mmc_wait_for_cmd(sc, &cmd, 0); 674 675 cmd.opcode = MMC_BUSTEST_R; 676 cmd.arg = 0; 677 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 678 cmd.data = &data; 679 680 data.data = buf; 681 data.len = 8; 682 data.flags = MMC_DATA_READ; 683 err = mmc_wait_for_cmd(sc, &cmd, 0); 684 685 mmcbr_set_bus_width(sc->dev, bus_width_1); 686 mmcbr_update_ios(sc->dev); 687 688 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 689 return (bus_width_8); 690 } 691 692 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 693 mmcbr_set_bus_width(sc->dev, bus_width_4); 694 mmcbr_update_ios(sc->dev); 695 696 cmd.opcode = MMC_BUSTEST_W; 697 cmd.arg = 0; 698 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 699 cmd.data = &data; 700 701 data.data = p4; 702 data.len = 4; 703 data.flags = MMC_DATA_WRITE; 704 mmc_wait_for_cmd(sc, &cmd, 0); 705 706 cmd.opcode = MMC_BUSTEST_R; 707 cmd.arg = 0; 708 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 709 cmd.data = &data; 710 711 data.data = buf; 712 data.len = 4; 713 data.flags = MMC_DATA_READ; 714 err = mmc_wait_for_cmd(sc, &cmd, 0); 715 716 mmcbr_set_bus_width(sc->dev, bus_width_1); 717 mmcbr_update_ios(sc->dev); 718 719 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 720 return (bus_width_4); 721 } 722 return (bus_width_1); 723 } 724 725 static uint32_t 726 mmc_get_bits(uint32_t *bits, int start, int size) 727 { 728 const int bit_len = 128; 729 const int i = (bit_len / 32) - (start / 32) - 1; 730 const int shift = start & 31; 731 uint32_t retval = bits[i] >> shift; 732 if (size + shift > 32) 733 retval |= bits[i - 1] << (32 - shift); 734 return (retval & ((1 << size) - 1)); 735 } 736 737 static void 738 mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 739 { 740 int i; 741 742 /* There's no version info, so we take it on faith */ 743 memset(cid, 0, sizeof(*cid)); 744 cid->mid = mmc_get_bits(raw_cid, 120, 8); 745 cid->oid = mmc_get_bits(raw_cid, 104, 16); 746 for (i = 0; i < 5; i++) 747 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 748 cid->prv = mmc_get_bits(raw_cid, 56, 8); 749 cid->psn = mmc_get_bits(raw_cid, 24, 32); 750 cid->mdt_year = mmc_get_bits(raw_cid, 12, 8) + 2001; 751 cid->mdt_month = mmc_get_bits(raw_cid, 8, 4); 752 } 753 754 static void 755 mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 756 { 757 int i; 758 759 /* There's no version info, so we take it on faith */ 760 memset(cid, 0, sizeof(*cid)); 761 cid->mid = mmc_get_bits(raw_cid, 120, 8); 762 cid->oid = mmc_get_bits(raw_cid, 104, 8); 763 for (i = 0; i < 6; i++) 764 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 765 cid->prv = mmc_get_bits(raw_cid, 48, 8); 766 cid->psn = mmc_get_bits(raw_cid, 16, 32); 767 cid->mdt_month = mmc_get_bits(raw_cid, 12, 4); 768 cid->mdt_year = mmc_get_bits(raw_cid, 8, 4) + 1997; 769 } 770 771 static const int exp[8] = { 772 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 773 }; 774 static const int mant[16] = { 775 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 776 }; 777 static const int cur_min[8] = { 778 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 779 }; 780 static const int cur_max[8] = { 781 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 782 }; 783 784 static void 785 mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 786 { 787 int v; 788 int m; 789 int e; 790 791 memset(csd, 0, sizeof(*csd)); 792 csd->csd_structure = v = mmc_get_bits(raw_csd, 126, 2); 793 if (v == 0) { 794 m = mmc_get_bits(raw_csd, 115, 4); 795 e = mmc_get_bits(raw_csd, 112, 3); 796 csd->tacc = exp[e] * mant[m] + 9 / 10; 797 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 798 m = mmc_get_bits(raw_csd, 99, 4); 799 e = mmc_get_bits(raw_csd, 96, 3); 800 csd->tran_speed = exp[e] * 10000 * mant[m]; 801 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 802 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 803 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 804 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 805 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 806 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 807 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 808 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 809 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 810 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 811 m = mmc_get_bits(raw_csd, 62, 12); 812 e = mmc_get_bits(raw_csd, 47, 3); 813 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 814 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 815 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 816 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 817 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 818 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 819 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 820 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 821 } else if (v == 1) { 822 m = mmc_get_bits(raw_csd, 115, 4); 823 e = mmc_get_bits(raw_csd, 112, 3); 824 csd->tacc = exp[e] * mant[m] + 9 / 10; 825 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 826 m = mmc_get_bits(raw_csd, 99, 4); 827 e = mmc_get_bits(raw_csd, 96, 3); 828 csd->tran_speed = exp[e] * 10000 * mant[m]; 829 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 830 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 831 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 832 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 833 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 834 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 835 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 48, 22) + 1) * 836 512 * 1024; 837 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 838 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 839 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 840 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 841 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 842 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 843 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 844 } else 845 panic("unknown SD CSD version"); 846 } 847 848 static void 849 mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 850 { 851 int m; 852 int e; 853 854 memset(csd, 0, sizeof(*csd)); 855 csd->csd_structure = mmc_get_bits(raw_csd, 126, 2); 856 csd->spec_vers = mmc_get_bits(raw_csd, 122, 4); 857 m = mmc_get_bits(raw_csd, 115, 4); 858 e = mmc_get_bits(raw_csd, 112, 3); 859 csd->tacc = exp[e] * mant[m] + 9 / 10; 860 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 861 m = mmc_get_bits(raw_csd, 99, 4); 862 e = mmc_get_bits(raw_csd, 96, 3); 863 csd->tran_speed = exp[e] * 10000 * mant[m]; 864 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 865 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 866 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 867 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 868 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 869 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 870 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 871 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 872 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 873 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 874 m = mmc_get_bits(raw_csd, 62, 12); 875 e = mmc_get_bits(raw_csd, 47, 3); 876 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 877 // csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 878 // csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 879 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 5); 880 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 881 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 882 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 883 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 884 } 885 886 static void 887 mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 888 { 889 unsigned int scr_struct; 890 uint32_t tmp[4]; 891 892 tmp[3] = raw_scr[1]; 893 tmp[2] = raw_scr[0]; 894 895 memset(scr, 0, sizeof(*scr)); 896 897 scr_struct = mmc_get_bits(tmp, 60, 4); 898 if (scr_struct != 0) { 899 printf("Unrecognised SCR structure version %d\n", 900 scr_struct); 901 return; 902 } 903 scr->sda_vsn = mmc_get_bits(tmp, 56, 4); 904 scr->bus_widths = mmc_get_bits(tmp, 48, 4); 905 } 906 907 static int 908 mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 909 { 910 struct mmc_command cmd; 911 int err; 912 913 cmd.opcode = MMC_ALL_SEND_CID; 914 cmd.arg = 0; 915 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 916 cmd.data = NULL; 917 err = mmc_wait_for_cmd(sc, &cmd, 0); 918 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 919 return (err); 920 } 921 922 static int 923 mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 924 { 925 struct mmc_command cmd; 926 int err; 927 928 cmd.opcode = MMC_SEND_CSD; 929 cmd.arg = rca << 16; 930 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 931 cmd.data = NULL; 932 err = mmc_wait_for_cmd(sc, &cmd, 0); 933 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 934 return (err); 935 } 936 937 static int 938 mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 939 { 940 int err; 941 struct mmc_command cmd; 942 struct mmc_data data; 943 944 memset(&cmd, 0, sizeof(struct mmc_command)); 945 memset(&data, 0, sizeof(struct mmc_data)); 946 947 memset(rawscr, 0, 8); 948 cmd.opcode = ACMD_SEND_SCR; 949 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 950 cmd.arg = 0; 951 cmd.data = &data; 952 953 data.data = rawscr; 954 data.len = 8; 955 data.flags = MMC_DATA_READ; 956 957 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 958 rawscr[0] = be32toh(rawscr[0]); 959 rawscr[1] = be32toh(rawscr[1]); 960 return (err); 961 } 962 963 static int 964 mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 965 { 966 int err; 967 struct mmc_command cmd; 968 struct mmc_data data; 969 970 memset(&cmd, 0, sizeof(struct mmc_command)); 971 memset(&data, 0, sizeof(struct mmc_data)); 972 973 memset(rawextcsd, 0, 512); 974 cmd.opcode = MMC_SEND_EXT_CSD; 975 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 976 cmd.arg = 0; 977 cmd.data = &data; 978 979 data.data = rawextcsd; 980 data.len = 512; 981 data.flags = MMC_DATA_READ; 982 983 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 984 return (err); 985 } 986 987 static int 988 mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 989 { 990 struct mmc_command cmd; 991 int err; 992 993 cmd.opcode = MMC_SET_RELATIVE_ADDR; 994 cmd.arg = resp << 16; 995 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 996 cmd.data = NULL; 997 err = mmc_wait_for_cmd(sc, &cmd, 0); 998 return (err); 999 } 1000 1001 static int 1002 mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1003 { 1004 struct mmc_command cmd; 1005 int err; 1006 1007 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1008 cmd.arg = 0; 1009 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1010 cmd.data = NULL; 1011 err = mmc_wait_for_cmd(sc, &cmd, 0); 1012 *resp = cmd.resp[0]; 1013 return (err); 1014 } 1015 1016 static void 1017 mmc_discover_cards(struct mmc_softc *sc) 1018 { 1019 struct mmc_ivars *ivar; 1020 int err; 1021 uint32_t resp, sec_count; 1022 device_t child; 1023 uint16_t rca = 2; 1024 u_char switch_res[64]; 1025 1026 while (1) { 1027 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1028 M_WAITOK | M_ZERO); 1029 if (!ivar) 1030 return; 1031 err = mmc_all_send_cid(sc, ivar->raw_cid); 1032 if (err == MMC_ERR_TIMEOUT) 1033 break; 1034 if (err != MMC_ERR_NONE) { 1035 device_printf(sc->dev, "Error reading CID %d\n", err); 1036 break; 1037 } 1038 if (mmcbr_get_ro(sc->dev)) 1039 ivar->read_only = 1; 1040 ivar->bus_width = bus_width_1; 1041 ivar->mode = mmcbr_get_mode(sc->dev); 1042 if (ivar->mode == mode_sd) { 1043 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1044 mmc_send_relative_addr(sc, &resp); 1045 ivar->rca = resp >> 16; 1046 /* Get card CSD. */ 1047 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1048 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1049 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1050 if (ivar->csd.csd_structure > 0) 1051 ivar->high_cap = 1; 1052 ivar->tran_speed = ivar->csd.tran_speed; 1053 /* Get card SCR. Card must be selected to fetch it. */ 1054 mmc_select_card(sc, ivar->rca); 1055 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1056 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1057 /* Get card switch capabilities. */ 1058 if ((ivar->scr.sda_vsn >= 1) && 1059 (ivar->csd.ccc & (1<<10))) { 1060 mmc_sd_switch(sc, 0, 0, 0xF, switch_res); 1061 if (switch_res[13] & 2) { 1062 ivar->timing = bus_timing_hs; 1063 ivar->hs_tran_speed = 50000000; 1064 } 1065 } 1066 mmc_select_card(sc, 0); 1067 /* Find max supported bus width. */ 1068 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1069 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1070 ivar->bus_width = bus_width_4; 1071 /* Add device. */ 1072 child = device_add_child(sc->dev, NULL, -1); 1073 device_set_ivars(child, ivar); 1074 return; 1075 } 1076 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1077 ivar->rca = rca++; 1078 mmc_set_relative_addr(sc, ivar->rca); 1079 /* Get card CSD. */ 1080 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1081 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1082 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1083 ivar->tran_speed = ivar->csd.tran_speed; 1084 /* Only MMC >= 4.x cards support EXT_CSD. */ 1085 if (ivar->csd.spec_vers >= 4) { 1086 /* Card must be selected to fetch EXT_CSD. */ 1087 mmc_select_card(sc, ivar->rca); 1088 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1089 /* Handle extended capacity from EXT_CSD */ 1090 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1091 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1092 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1093 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1094 if (sec_count != 0) { 1095 ivar->sec_count = sec_count; 1096 ivar->high_cap = 1; 1097 } 1098 /* Get card speed in high speed mode. */ 1099 ivar->timing = bus_timing_hs; 1100 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1101 & EXT_CSD_CARD_TYPE_52) 1102 ivar->hs_tran_speed = 52000000; 1103 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1104 & EXT_CSD_CARD_TYPE_26) 1105 ivar->hs_tran_speed = 26000000; 1106 else 1107 ivar->hs_tran_speed = ivar->tran_speed; 1108 /* Find max supported bus width. */ 1109 ivar->bus_width = mmc_test_bus_width(sc); 1110 mmc_select_card(sc, 0); 1111 } else { 1112 ivar->bus_width = bus_width_1; 1113 ivar->timing = bus_timing_normal; 1114 } 1115 /* Add device. */ 1116 child = device_add_child(sc->dev, NULL, -1); 1117 device_set_ivars(child, ivar); 1118 } 1119 free(ivar, M_DEVBUF); 1120 } 1121 1122 static void 1123 mmc_go_discovery(struct mmc_softc *sc) 1124 { 1125 uint32_t ocr; 1126 device_t dev; 1127 int err; 1128 1129 dev = sc->dev; 1130 if (mmcbr_get_power_mode(dev) != power_on) { 1131 /* 1132 * First, try SD modes 1133 */ 1134 mmcbr_set_mode(dev, mode_sd); 1135 mmc_power_up(sc); 1136 mmcbr_set_bus_mode(dev, pushpull); 1137 mmc_idle_cards(sc); 1138 err = mmc_send_if_cond(sc, 1); 1139 if (mmc_send_app_op_cond(sc, err ? 0 : MMC_OCR_CCS, &ocr) != 1140 MMC_ERR_NONE) { 1141 /* 1142 * Failed, try MMC 1143 */ 1144 mmcbr_set_mode(dev, mode_mmc); 1145 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) 1146 return; /* Failed both, punt! XXX powerdown? */ 1147 } 1148 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1149 if (mmcbr_get_ocr(dev) != 0) 1150 mmc_idle_cards(sc); 1151 } else { 1152 mmcbr_set_bus_mode(dev, opendrain); 1153 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1154 mmcbr_update_ios(dev); 1155 /* XXX recompute vdd based on new cards? */ 1156 } 1157 /* 1158 * Make sure that we have a mutually agreeable voltage to at least 1159 * one card on the bus. 1160 */ 1161 if (mmcbr_get_ocr(dev) == 0) 1162 return; 1163 /* 1164 * Reselect the cards after we've idled them above. 1165 */ 1166 if (mmcbr_get_mode(dev) == mode_sd) { 1167 err = mmc_send_if_cond(sc, 1); 1168 mmc_send_app_op_cond(sc, 1169 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1170 } else 1171 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1172 mmc_discover_cards(sc); 1173 1174 mmcbr_set_bus_mode(dev, pushpull); 1175 mmcbr_update_ios(dev); 1176 mmc_calculate_clock(sc); 1177 bus_generic_attach(dev); 1178 /* mmc_update_children_sysctl(dev);*/ 1179 } 1180 1181 static int 1182 mmc_calculate_clock(struct mmc_softc *sc) 1183 { 1184 int max_dtr, max_hs_dtr, max_timing; 1185 int nkid, i, f_min, f_max; 1186 device_t *kids; 1187 struct mmc_ivars *ivar; 1188 1189 f_min = mmcbr_get_f_min(sc->dev); 1190 f_max = mmcbr_get_f_max(sc->dev); 1191 max_dtr = max_hs_dtr = f_max; 1192 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1193 max_timing = bus_timing_hs; 1194 else 1195 max_timing = bus_timing_normal; 1196 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1197 panic("can't get children"); 1198 for (i = 0; i < nkid; i++) { 1199 ivar = device_get_ivars(kids[i]); 1200 if (ivar->timing < max_timing) 1201 max_timing = ivar->timing; 1202 if (ivar->tran_speed < max_dtr) 1203 max_dtr = ivar->tran_speed; 1204 if (ivar->hs_tran_speed < max_dtr) 1205 max_hs_dtr = ivar->hs_tran_speed; 1206 } 1207 for (i = 0; i < nkid; i++) { 1208 ivar = device_get_ivars(kids[i]); 1209 if (ivar->timing == bus_timing_normal) 1210 continue; 1211 mmc_select_card(sc, ivar->rca); 1212 mmc_set_timing(sc, max_timing); 1213 } 1214 mmc_select_card(sc, 0); 1215 free(kids, M_TEMP); 1216 if (max_timing == bus_timing_hs) 1217 max_dtr = max_hs_dtr; 1218 if (bootverbose) { 1219 device_printf(sc->dev, 1220 "setting transfer rate to %d.%03dMHz%s\n", 1221 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1222 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1223 } 1224 mmcbr_set_timing(sc->dev, max_timing); 1225 mmcbr_set_clock(sc->dev, max_dtr); 1226 mmcbr_update_ios(sc->dev); 1227 return max_dtr; 1228 } 1229 1230 static void 1231 mmc_scan(struct mmc_softc *sc) 1232 { 1233 device_t dev; 1234 1235 dev = sc->dev; 1236 mmc_acquire_bus(dev, dev); 1237 1238 if (mmcbr_get_power_mode(dev) == power_on) 1239 mmc_rescan_cards(sc); 1240 mmc_go_discovery(sc); 1241 1242 mmc_release_bus(dev, dev); 1243 /* XXX probe/attach/detach children? */ 1244 } 1245 1246 static int 1247 mmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 1248 { 1249 struct mmc_ivars *ivar = device_get_ivars(child); 1250 1251 switch (which) { 1252 default: 1253 return (EINVAL); 1254 case MMC_IVAR_DSR_IMP: 1255 *(int *)result = ivar->csd.dsr_imp; 1256 break; 1257 case MMC_IVAR_MEDIA_SIZE: 1258 *(off_t *)result = ivar->sec_count; 1259 break; 1260 case MMC_IVAR_RCA: 1261 *(int *)result = ivar->rca; 1262 break; 1263 case MMC_IVAR_SECTOR_SIZE: 1264 *(int *)result = MMC_SECTOR_SIZE; 1265 break; 1266 case MMC_IVAR_TRAN_SPEED: 1267 *(int *)result = mmcbr_get_clock(bus); 1268 break; 1269 case MMC_IVAR_READ_ONLY: 1270 *(int *)result = ivar->read_only; 1271 break; 1272 case MMC_IVAR_HIGH_CAP: 1273 *(int *)result = ivar->high_cap; 1274 break; 1275 case MMC_IVAR_CARD_TYPE: 1276 *(int *)result = ivar->mode; 1277 break; 1278 case MMC_IVAR_BUS_WIDTH: 1279 *(int *)result = ivar->bus_width; 1280 break; 1281 } 1282 return (0); 1283 } 1284 1285 static int 1286 mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1287 { 1288 /* 1289 * None are writable ATM 1290 */ 1291 return (EINVAL); 1292 } 1293 1294 1295 static void 1296 mmc_delayed_attach(void *xsc) 1297 { 1298 struct mmc_softc *sc = xsc; 1299 1300 mmc_scan(sc); 1301 config_intrhook_disestablish(&sc->config_intrhook); 1302 } 1303 1304 static device_method_t mmc_methods[] = { 1305 /* device_if */ 1306 DEVMETHOD(device_probe, mmc_probe), 1307 DEVMETHOD(device_attach, mmc_attach), 1308 DEVMETHOD(device_detach, mmc_detach), 1309 1310 /* Bus interface */ 1311 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1312 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1313 1314 /* MMC Bus interface */ 1315 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1316 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1317 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1318 1319 {0, 0}, 1320 }; 1321 1322 static driver_t mmc_driver = { 1323 "mmc", 1324 mmc_methods, 1325 sizeof(struct mmc_softc), 1326 }; 1327 static devclass_t mmc_devclass; 1328 1329 1330 DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 1331 DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, 0, 0); 1332