mmc.c revision 187551
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: head/sys/dev/mmc/mmc.c 187551 2009-01-21 17:49:23Z imp $"); 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 72struct 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 */ 83struct 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 uint32_t raw_sd_status[16]; /* Raw bits of the SD_STATUS */ 89 uint16_t rca; 90 enum mmc_card_mode mode; 91 struct mmc_cid cid; /* cid decoded */ 92 struct mmc_csd csd; /* csd decoded */ 93 struct mmc_scr scr; /* scr decoded */ 94 struct mmc_sd_status sd_status; /* SD_STATUS decoded */ 95 u_char read_only; /* True when the device is read-only */ 96 u_char bus_width; /* Bus width to use */ 97 u_char timing; /* Bus timing support */ 98 u_char high_cap; /* High Capacity card (block addressed) */ 99 uint32_t sec_count; /* Card capacity in 512byte blocks */ 100 uint32_t tran_speed; /* Max speed in normal mode */ 101 uint32_t hs_tran_speed; /* Max speed in high speed mode */ 102 uint32_t erase_sector; /* Card native erase sector size */ 103}; 104 105#define CMD_RETRIES 3 106 107/* bus entry points */ 108static int mmc_probe(device_t dev); 109static int mmc_attach(device_t dev); 110static int mmc_detach(device_t dev); 111static int mmc_suspend(device_t dev); 112static int mmc_resume(device_t dev); 113 114#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 115#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 116#define MMC_LOCK_INIT(_sc) \ 117 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 118 "mmc", MTX_DEF) 119#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 120#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 121#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 122 123static int mmc_calculate_clock(struct mmc_softc *sc); 124static void mmc_delayed_attach(void *); 125static void mmc_power_down(struct mmc_softc *sc); 126static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 127 int retries); 128static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 129 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 130static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 131static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 132static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 133static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 134static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 135static void mmc_scan(struct mmc_softc *sc); 136static int mmc_delete_cards(struct mmc_softc *sc); 137 138static void 139mmc_ms_delay(int ms) 140{ 141 DELAY(1000 * ms); /* XXX BAD */ 142} 143 144static int 145mmc_probe(device_t dev) 146{ 147 148 device_set_desc(dev, "MMC/SD bus"); 149 return (0); 150} 151 152static int 153mmc_attach(device_t dev) 154{ 155 struct mmc_softc *sc; 156 157 sc = device_get_softc(dev); 158 sc->dev = dev; 159 MMC_LOCK_INIT(sc); 160 161 /* We'll probe and attach our children later, but before / mount */ 162 sc->config_intrhook.ich_func = mmc_delayed_attach; 163 sc->config_intrhook.ich_arg = sc; 164 if (config_intrhook_establish(&sc->config_intrhook) != 0) 165 device_printf(dev, "config_intrhook_establish failed\n"); 166 return (0); 167} 168 169static int 170mmc_detach(device_t dev) 171{ 172 struct mmc_softc *sc = device_get_softc(dev); 173 int err; 174 175 if ((err = mmc_delete_cards(sc)) != 0) 176 return (err); 177 mmc_power_down(sc); 178 MMC_LOCK_DESTROY(sc); 179 180 return (0); 181} 182 183static int 184mmc_suspend(device_t dev) 185{ 186 struct mmc_softc *sc = device_get_softc(dev); 187 int err; 188 189 err = bus_generic_suspend(dev); 190 if (err) 191 return (err); 192 mmc_power_down(sc); 193 return (0); 194} 195 196static int 197mmc_resume(device_t dev) 198{ 199 struct mmc_softc *sc = device_get_softc(dev); 200 201 mmc_scan(sc); 202 return (bus_generic_resume(dev)); 203} 204 205static int 206mmc_acquire_bus(device_t busdev, device_t dev) 207{ 208 struct mmc_softc *sc; 209 struct mmc_ivars *ivar; 210 int err; 211 int rca; 212 213 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 214 if (err) 215 return (err); 216 sc = device_get_softc(busdev); 217 MMC_LOCK(sc); 218 if (sc->owner) 219 panic("mmc: host bridge didn't seralize us."); 220 sc->owner = dev; 221 MMC_UNLOCK(sc); 222 223 if (busdev != dev) { 224 /* 225 * Keep track of the last rca that we've selected. If 226 * we're asked to do it again, don't. We never 227 * unselect unless the bus code itself wants the mmc 228 * bus, and constantly reselecting causes problems. 229 */ 230 rca = mmc_get_rca(dev); 231 if (sc->last_rca != rca) { 232 mmc_select_card(sc, rca); 233 sc->last_rca = rca; 234 /* Prepare bus width for the new card. */ 235 ivar = device_get_ivars(dev); 236 if (bootverbose) { 237 device_printf(busdev, 238 "setting bus width to %d bits\n", 239 (ivar->bus_width == bus_width_4) ? 4 : 240 (ivar->bus_width == bus_width_8) ? 8 : 1); 241 } 242 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 243 mmcbr_set_bus_width(busdev, ivar->bus_width); 244 mmcbr_update_ios(busdev); 245 } 246 } else { 247 /* 248 * If there's a card selected, stand down. 249 */ 250 if (sc->last_rca != 0) { 251 mmc_select_card(sc, 0); 252 sc->last_rca = 0; 253 } 254 } 255 256 return (0); 257} 258 259static int 260mmc_release_bus(device_t busdev, device_t dev) 261{ 262 struct mmc_softc *sc; 263 int err; 264 265 sc = device_get_softc(busdev); 266 267 MMC_LOCK(sc); 268 if (!sc->owner) 269 panic("mmc: releasing unowned bus."); 270 if (sc->owner != dev) 271 panic("mmc: you don't own the bus. game over."); 272 MMC_UNLOCK(sc); 273 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 274 if (err) 275 return (err); 276 MMC_LOCK(sc); 277 sc->owner = NULL; 278 MMC_UNLOCK(sc); 279 return (0); 280} 281 282static uint32_t 283mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 284{ 285 286 return (ocr & MMC_OCR_VOLTAGE); 287} 288 289static int 290mmc_highest_voltage(uint32_t ocr) 291{ 292 int i; 293 294 for (i = 30; i >= 0; i--) 295 if (ocr & (1 << i)) 296 return (i); 297 return (-1); 298} 299 300static void 301mmc_wakeup(struct mmc_request *req) 302{ 303 struct mmc_softc *sc; 304 305 sc = (struct mmc_softc *)req->done_data; 306 MMC_LOCK(sc); 307 req->flags |= MMC_REQ_DONE; 308 MMC_UNLOCK(sc); 309 wakeup(req); 310} 311 312static int 313mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 314{ 315 316 req->done = mmc_wakeup; 317 req->done_data = sc; 318 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 319 MMC_LOCK(sc); 320 while ((req->flags & MMC_REQ_DONE) == 0) 321 msleep(req, &sc->sc_mtx, 0, "mmcreq", 0); 322 MMC_UNLOCK(sc); 323 return (0); 324} 325 326static int 327mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 328{ 329 struct mmc_softc *sc = device_get_softc(brdev); 330 331 return (mmc_wait_for_req(sc, req)); 332} 333 334static int 335mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 336{ 337 struct mmc_request mreq; 338 339 memset(&mreq, 0, sizeof(mreq)); 340 memset(cmd->resp, 0, sizeof(cmd->resp)); 341 cmd->retries = retries; 342 mreq.cmd = cmd; 343 if (bootverbose) 344 device_printf(sc->dev, "CMD: %#x ARG %#x\n", cmd->opcode, 345 cmd->arg); 346 mmc_wait_for_req(sc, &mreq); 347 return (cmd->error); 348} 349 350static int 351mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 352 struct mmc_command *cmd, int retries) 353{ 354 struct mmc_command appcmd; 355 int err = MMC_ERR_NONE, i; 356 357 for (i = 0; i <= retries; i++) { 358 appcmd.opcode = MMC_APP_CMD; 359 appcmd.arg = rca << 16; 360 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 361 appcmd.data = NULL; 362 mmc_wait_for_cmd(sc, &appcmd, 0); 363 err = appcmd.error; 364 if (err != MMC_ERR_NONE) 365 continue; 366 if (!(appcmd.resp[0] & R1_APP_CMD)) 367 return MMC_ERR_FAILED; 368 mmc_wait_for_cmd(sc, cmd, 0); 369 err = cmd->error; 370 if (err == MMC_ERR_NONE) 371 break; 372 } 373 return (err); 374} 375 376static int 377mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 378 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 379{ 380 struct mmc_command cmd; 381 int err; 382 383 memset(&cmd, 0, sizeof(cmd)); 384 cmd.opcode = opcode; 385 cmd.arg = arg; 386 cmd.flags = flags; 387 cmd.data = NULL; 388 err = mmc_wait_for_cmd(sc, &cmd, retries); 389 if (err) 390 return (err); 391 if (cmd.error) 392 return (cmd.error); 393 if (resp) { 394 if (flags & MMC_RSP_136) 395 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 396 else 397 *resp = cmd.resp[0]; 398 } 399 return (0); 400} 401 402static void 403mmc_idle_cards(struct mmc_softc *sc) 404{ 405 device_t dev; 406 struct mmc_command cmd; 407 408 dev = sc->dev; 409 mmcbr_set_chip_select(dev, cs_high); 410 mmcbr_update_ios(dev); 411 mmc_ms_delay(1); 412 413 memset(&cmd, 0, sizeof(cmd)); 414 cmd.opcode = MMC_GO_IDLE_STATE; 415 cmd.arg = 0; 416 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 417 cmd.data = NULL; 418 mmc_wait_for_cmd(sc, &cmd, 0); 419 mmc_ms_delay(1); 420 421 mmcbr_set_chip_select(dev, cs_dontcare); 422 mmcbr_update_ios(dev); 423 mmc_ms_delay(1); 424} 425 426static int 427mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 428{ 429 struct mmc_command cmd; 430 int err = MMC_ERR_NONE, i; 431 432 memset(&cmd, 0, sizeof(cmd)); 433 cmd.opcode = ACMD_SD_SEND_OP_COND; 434 cmd.arg = ocr; 435 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 436 cmd.data = NULL; 437 438 for (i = 0; i < 100; i++) { 439 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 440 if (err != MMC_ERR_NONE) 441 break; 442 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 443 (ocr & MMC_OCR_VOLTAGE) == 0) 444 break; 445 err = MMC_ERR_TIMEOUT; 446 mmc_ms_delay(10); 447 } 448 if (rocr && err == MMC_ERR_NONE) 449 *rocr = cmd.resp[0]; 450 return (err); 451} 452 453static int 454mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 455{ 456 struct mmc_command cmd; 457 int err = MMC_ERR_NONE, i; 458 459 memset(&cmd, 0, sizeof(cmd)); 460 cmd.opcode = MMC_SEND_OP_COND; 461 cmd.arg = ocr; 462 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 463 cmd.data = NULL; 464 465 for (i = 0; i < 100; i++) { 466 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 467 if (err != MMC_ERR_NONE) 468 break; 469 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 470 (ocr & MMC_OCR_VOLTAGE) == 0) 471 break; 472 err = MMC_ERR_TIMEOUT; 473 mmc_ms_delay(10); 474 } 475 if (rocr && err == MMC_ERR_NONE) 476 *rocr = cmd.resp[0]; 477 return (err); 478} 479 480static int 481mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 482{ 483 struct mmc_command cmd; 484 int err; 485 486 memset(&cmd, 0, sizeof(cmd)); 487 cmd.opcode = SD_SEND_IF_COND; 488 cmd.arg = (vhs << 8) + 0xAA; 489 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 490 cmd.data = NULL; 491 492 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 493 return (err); 494} 495 496static void 497mmc_power_up(struct mmc_softc *sc) 498{ 499 device_t dev; 500 501 dev = sc->dev; 502 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 503 mmcbr_set_bus_mode(dev, opendrain); 504 mmcbr_set_chip_select(dev, cs_dontcare); 505 mmcbr_set_bus_width(dev, bus_width_1); 506 mmcbr_set_power_mode(dev, power_up); 507 mmcbr_set_clock(dev, 0); 508 mmcbr_update_ios(dev); 509 mmc_ms_delay(1); 510 511 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 512 mmcbr_set_timing(dev, bus_timing_normal); 513 mmcbr_set_power_mode(dev, power_on); 514 mmcbr_update_ios(dev); 515 mmc_ms_delay(2); 516} 517 518static void 519mmc_power_down(struct mmc_softc *sc) 520{ 521 device_t dev = sc->dev; 522 523 mmcbr_set_bus_mode(dev, opendrain); 524 mmcbr_set_chip_select(dev, cs_dontcare); 525 mmcbr_set_bus_width(dev, bus_width_1); 526 mmcbr_set_power_mode(dev, power_off); 527 mmcbr_set_clock(dev, 0); 528 mmcbr_set_timing(dev, bus_timing_normal); 529 mmcbr_update_ios(dev); 530} 531 532static int 533mmc_select_card(struct mmc_softc *sc, uint16_t rca) 534{ 535 int flags; 536 537 flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; 538 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16, 539 flags, NULL, CMD_RETRIES)); 540} 541 542static int 543mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 544{ 545 struct mmc_command cmd; 546 int err; 547 548 cmd.opcode = MMC_SWITCH_FUNC; 549 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 550 (index << 16) | 551 (value << 8) | 552 set; 553 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 554 cmd.data = NULL; 555 err = mmc_wait_for_cmd(sc, &cmd, 0); 556 return (err); 557} 558 559static int 560mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, uint8_t *res) 561{ 562 int err; 563 struct mmc_command cmd; 564 struct mmc_data data; 565 566 memset(&cmd, 0, sizeof(struct mmc_command)); 567 memset(&data, 0, sizeof(struct mmc_data)); 568 569 memset(res, 0, 64); 570 cmd.opcode = SD_SWITCH_FUNC; 571 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 572 cmd.arg = mode << 31; 573 cmd.arg |= 0x00FFFFFF; 574 cmd.arg &= ~(0xF << (grp * 4)); 575 cmd.arg |= value << (grp * 4); 576 cmd.data = &data; 577 578 data.data = res; 579 data.len = 64; 580 data.flags = MMC_DATA_READ; 581 582 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 583 return (err); 584} 585 586static int 587mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 588{ 589 struct mmc_command cmd; 590 int err; 591 uint8_t value; 592 593 if (mmcbr_get_mode(sc->dev) == mode_sd) { 594 memset(&cmd, 0, sizeof(struct mmc_command)); 595 cmd.opcode = ACMD_SET_BUS_WIDTH; 596 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 597 switch (width) { 598 case bus_width_1: 599 cmd.arg = SD_BUS_WIDTH_1; 600 break; 601 case bus_width_4: 602 cmd.arg = SD_BUS_WIDTH_4; 603 break; 604 default: 605 return (MMC_ERR_INVALID); 606 } 607 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 608 } else { 609 switch (width) { 610 case bus_width_1: 611 value = EXT_CSD_BUS_WIDTH_1; 612 break; 613 case bus_width_4: 614 value = EXT_CSD_BUS_WIDTH_4; 615 break; 616 case bus_width_8: 617 value = EXT_CSD_BUS_WIDTH_8; 618 break; 619 default: 620 return (MMC_ERR_INVALID); 621 } 622 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 623 value); 624 } 625 return (err); 626} 627 628static int 629mmc_set_timing(struct mmc_softc *sc, int timing) 630{ 631 int err; 632 uint8_t value; 633 u_char switch_res[64]; 634 635 switch (timing) { 636 case bus_timing_normal: 637 value = 0; 638 break; 639 case bus_timing_hs: 640 value = 1; 641 break; 642 default: 643 return (MMC_ERR_INVALID); 644 } 645 if (mmcbr_get_mode(sc->dev) == mode_sd) 646 err = mmc_sd_switch(sc, 1, 0, value, switch_res); 647 else 648 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 649 EXT_CSD_HS_TIMING, value); 650 return (err); 651} 652 653static int 654mmc_test_bus_width(struct mmc_softc *sc) 655{ 656 struct mmc_command cmd; 657 struct mmc_data data; 658 int err; 659 uint8_t buf[8]; 660 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 661 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 662 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 663 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 664 665 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 666 mmcbr_set_bus_width(sc->dev, bus_width_8); 667 mmcbr_update_ios(sc->dev); 668 669 cmd.opcode = MMC_BUSTEST_W; 670 cmd.arg = 0; 671 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 672 cmd.data = &data; 673 674 data.data = p8; 675 data.len = 8; 676 data.flags = MMC_DATA_WRITE; 677 mmc_wait_for_cmd(sc, &cmd, 0); 678 679 cmd.opcode = MMC_BUSTEST_R; 680 cmd.arg = 0; 681 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 682 cmd.data = &data; 683 684 data.data = buf; 685 data.len = 8; 686 data.flags = MMC_DATA_READ; 687 err = mmc_wait_for_cmd(sc, &cmd, 0); 688 689 mmcbr_set_bus_width(sc->dev, bus_width_1); 690 mmcbr_update_ios(sc->dev); 691 692 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 693 return (bus_width_8); 694 } 695 696 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 697 mmcbr_set_bus_width(sc->dev, bus_width_4); 698 mmcbr_update_ios(sc->dev); 699 700 cmd.opcode = MMC_BUSTEST_W; 701 cmd.arg = 0; 702 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 703 cmd.data = &data; 704 705 data.data = p4; 706 data.len = 4; 707 data.flags = MMC_DATA_WRITE; 708 mmc_wait_for_cmd(sc, &cmd, 0); 709 710 cmd.opcode = MMC_BUSTEST_R; 711 cmd.arg = 0; 712 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 713 cmd.data = &data; 714 715 data.data = buf; 716 data.len = 4; 717 data.flags = MMC_DATA_READ; 718 err = mmc_wait_for_cmd(sc, &cmd, 0); 719 720 mmcbr_set_bus_width(sc->dev, bus_width_1); 721 mmcbr_update_ios(sc->dev); 722 723 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 724 return (bus_width_4); 725 } 726 return (bus_width_1); 727} 728 729static uint32_t 730mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) 731{ 732 const int i = (bit_len / 32) - (start / 32) - 1; 733 const int shift = start & 31; 734 uint32_t retval = bits[i] >> shift; 735 if (size + shift > 32) 736 retval |= bits[i - 1] << (32 - shift); 737 return (retval & ((1 << size) - 1)); 738} 739 740static void 741mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 742{ 743 int i; 744 745 /* There's no version info, so we take it on faith */ 746 memset(cid, 0, sizeof(*cid)); 747 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 748 cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); 749 for (i = 0; i < 5; i++) 750 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 751 cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); 752 cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); 753 cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2001; 754 cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); 755} 756 757static void 758mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 759{ 760 int i; 761 762 /* There's no version info, so we take it on faith */ 763 memset(cid, 0, sizeof(*cid)); 764 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 765 cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); 766 for (i = 0; i < 6; i++) 767 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 768 cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); 769 cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); 770 cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); 771 cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; 772} 773 774static const int exp[8] = { 775 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 776}; 777static const int mant[16] = { 778 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 779}; 780static const int cur_min[8] = { 781 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 782}; 783static const int cur_max[8] = { 784 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 785}; 786 787static void 788mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 789{ 790 int v; 791 int m; 792 int e; 793 794 memset(csd, 0, sizeof(*csd)); 795 csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); 796 if (v == 0) { 797 m = mmc_get_bits(raw_csd, 128, 115, 4); 798 e = mmc_get_bits(raw_csd, 128, 112, 3); 799 csd->tacc = exp[e] * mant[m] + 9 / 10; 800 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 801 m = mmc_get_bits(raw_csd, 128, 99, 4); 802 e = mmc_get_bits(raw_csd, 128, 96, 3); 803 csd->tran_speed = exp[e] * 10000 * mant[m]; 804 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 805 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 806 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 807 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 808 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 809 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 810 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 811 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 812 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 813 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 814 m = mmc_get_bits(raw_csd, 128, 62, 12); 815 e = mmc_get_bits(raw_csd, 128, 47, 3); 816 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 817 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 818 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 819 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 820 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 821 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 822 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 823 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 824 } else if (v == 1) { 825 m = mmc_get_bits(raw_csd, 128, 115, 4); 826 e = mmc_get_bits(raw_csd, 128, 112, 3); 827 csd->tacc = exp[e] * mant[m] + 9 / 10; 828 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 829 m = mmc_get_bits(raw_csd, 128, 99, 4); 830 e = mmc_get_bits(raw_csd, 128, 96, 3); 831 csd->tran_speed = exp[e] * 10000 * mant[m]; 832 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 833 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 834 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 835 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 836 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 837 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 838 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 839 512 * 1024; 840 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 841 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 842 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 843 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 844 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 845 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 846 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 847 } else 848 panic("unknown SD CSD version"); 849} 850 851static void 852mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 853{ 854 int m; 855 int e; 856 857 memset(csd, 0, sizeof(*csd)); 858 csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); 859 csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); 860 m = mmc_get_bits(raw_csd, 128, 115, 4); 861 e = mmc_get_bits(raw_csd, 128, 112, 3); 862 csd->tacc = exp[e] * mant[m] + 9 / 10; 863 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 864 m = mmc_get_bits(raw_csd, 128, 99, 4); 865 e = mmc_get_bits(raw_csd, 128, 96, 3); 866 csd->tran_speed = exp[e] * 10000 * mant[m]; 867 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 868 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 869 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 870 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 871 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 872 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 873 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 874 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 875 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 876 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 877 m = mmc_get_bits(raw_csd, 128, 62, 12); 878 e = mmc_get_bits(raw_csd, 128, 47, 3); 879 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 880 csd->erase_blk_en = 0; 881 csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * 882 (mmc_get_bits(raw_csd, 128, 37, 5) + 1); 883 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); 884 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 885 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 886 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 887 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 888} 889 890static void 891mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 892{ 893 unsigned int scr_struct; 894 895 memset(scr, 0, sizeof(*scr)); 896 897 scr_struct = mmc_get_bits(raw_scr, 64, 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(raw_scr, 64, 56, 4); 904 scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); 905} 906 907static void 908mmc_app_decode_sd_status(uint32_t *raw_sd_status, 909 struct mmc_sd_status *sd_status) 910{ 911 912 memset(sd_status, 0, sizeof(*sd_status)); 913 914 sd_status->bus_width = mmc_get_bits(raw_sd_status, 512, 510, 2); 915 sd_status->secured_mode = mmc_get_bits(raw_sd_status, 512, 509, 1); 916 sd_status->card_type = mmc_get_bits(raw_sd_status, 512, 480, 16); 917 sd_status->prot_area = mmc_get_bits(raw_sd_status, 512, 448, 12); 918 sd_status->speed_class = mmc_get_bits(raw_sd_status, 512, 440, 8); 919 sd_status->perf_move = mmc_get_bits(raw_sd_status, 512, 432, 8); 920 sd_status->au_size = mmc_get_bits(raw_sd_status, 512, 428, 4); 921 sd_status->erase_size = mmc_get_bits(raw_sd_status, 512, 408, 16); 922 sd_status->erase_timeout = mmc_get_bits(raw_sd_status, 512, 402, 6); 923 sd_status->erase_offset = mmc_get_bits(raw_sd_status, 512, 400, 2); 924} 925 926static int 927mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 928{ 929 struct mmc_command cmd; 930 int err; 931 932 cmd.opcode = MMC_ALL_SEND_CID; 933 cmd.arg = 0; 934 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 935 cmd.data = NULL; 936 err = mmc_wait_for_cmd(sc, &cmd, 0); 937 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 938 return (err); 939} 940 941static int 942mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 943{ 944 struct mmc_command cmd; 945 int err; 946 947 cmd.opcode = MMC_SEND_CSD; 948 cmd.arg = rca << 16; 949 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 950 cmd.data = NULL; 951 err = mmc_wait_for_cmd(sc, &cmd, 0); 952 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 953 return (err); 954} 955 956static int 957mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 958{ 959 int err; 960 struct mmc_command cmd; 961 struct mmc_data data; 962 963 memset(&cmd, 0, sizeof(struct mmc_command)); 964 memset(&data, 0, sizeof(struct mmc_data)); 965 966 memset(rawscr, 0, 8); 967 cmd.opcode = ACMD_SEND_SCR; 968 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 969 cmd.arg = 0; 970 cmd.data = &data; 971 972 data.data = rawscr; 973 data.len = 8; 974 data.flags = MMC_DATA_READ; 975 976 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 977 rawscr[0] = be32toh(rawscr[0]); 978 rawscr[1] = be32toh(rawscr[1]); 979 return (err); 980} 981 982static int 983mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 984{ 985 int err; 986 struct mmc_command cmd; 987 struct mmc_data data; 988 989 memset(&cmd, 0, sizeof(struct mmc_command)); 990 memset(&data, 0, sizeof(struct mmc_data)); 991 992 memset(rawextcsd, 0, 512); 993 cmd.opcode = MMC_SEND_EXT_CSD; 994 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 995 cmd.arg = 0; 996 cmd.data = &data; 997 998 data.data = rawextcsd; 999 data.len = 512; 1000 data.flags = MMC_DATA_READ; 1001 1002 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 1003 return (err); 1004} 1005 1006static int 1007mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, uint32_t *rawsdstatus) 1008{ 1009 int err, i; 1010 struct mmc_command cmd; 1011 struct mmc_data data; 1012 1013 memset(&cmd, 0, sizeof(struct mmc_command)); 1014 memset(&data, 0, sizeof(struct mmc_data)); 1015 1016 memset(rawsdstatus, 0, 64); 1017 cmd.opcode = ACMD_SD_STATUS; 1018 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1019 cmd.arg = 0; 1020 cmd.data = &data; 1021 1022 data.data = rawsdstatus; 1023 data.len = 64; 1024 data.flags = MMC_DATA_READ; 1025 1026 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1027 for (i = 0; i < 16; i++) 1028 rawsdstatus[i] = be32toh(rawsdstatus[i]); 1029 return (err); 1030} 1031 1032static int 1033mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 1034{ 1035 struct mmc_command cmd; 1036 int err; 1037 1038 cmd.opcode = MMC_SET_RELATIVE_ADDR; 1039 cmd.arg = resp << 16; 1040 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1041 cmd.data = NULL; 1042 err = mmc_wait_for_cmd(sc, &cmd, 0); 1043 return (err); 1044} 1045 1046static int 1047mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1048{ 1049 struct mmc_command cmd; 1050 int err; 1051 1052 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1053 cmd.arg = 0; 1054 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1055 cmd.data = NULL; 1056 err = mmc_wait_for_cmd(sc, &cmd, 0); 1057 *resp = cmd.resp[0]; 1058 return (err); 1059} 1060 1061static void 1062mmc_discover_cards(struct mmc_softc *sc) 1063{ 1064 struct mmc_ivars *ivar = NULL; 1065 device_t *devlist; 1066 int err, i, devcount, newcard; 1067 uint32_t raw_cid[4]; 1068 uint32_t resp, sec_count; 1069 device_t child; 1070 uint16_t rca = 2; 1071 u_char switch_res[64]; 1072 1073 while (1) { 1074 err = mmc_all_send_cid(sc, raw_cid); 1075 if (err == MMC_ERR_TIMEOUT) 1076 break; 1077 if (err != MMC_ERR_NONE) { 1078 device_printf(sc->dev, "Error reading CID %d\n", err); 1079 break; 1080 } 1081 newcard = 1; 1082 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1083 return; 1084 for (i = 0; i < devcount; i++) { 1085 ivar = device_get_ivars(devlist[i]); 1086 if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) { 1087 newcard = 0; 1088 break; 1089 } 1090 } 1091 free(devlist, M_TEMP); 1092 if (newcard) { 1093 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1094 M_WAITOK | M_ZERO); 1095 if (!ivar) 1096 return; 1097 memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid)); 1098 } 1099 if (mmcbr_get_ro(sc->dev)) 1100 ivar->read_only = 1; 1101 ivar->bus_width = bus_width_1; 1102 ivar->mode = mmcbr_get_mode(sc->dev); 1103 if (ivar->mode == mode_sd) { 1104 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1105 mmc_send_relative_addr(sc, &resp); 1106 ivar->rca = resp >> 16; 1107 /* Get card CSD. */ 1108 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1109 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1110 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1111 if (ivar->csd.csd_structure > 0) 1112 ivar->high_cap = 1; 1113 ivar->tran_speed = ivar->csd.tran_speed; 1114 ivar->erase_sector = ivar->csd.erase_sector * 1115 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1116 /* Get card SCR. Card must be selected to fetch it. */ 1117 mmc_select_card(sc, ivar->rca); 1118 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1119 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1120 /* Get card switch capabilities. */ 1121 ivar->timing = bus_timing_normal; 1122 if ((ivar->scr.sda_vsn >= 1) && 1123 (ivar->csd.ccc & (1<<10))) { 1124 mmc_sd_switch(sc, 0, 0, 0xF, switch_res); 1125 if (switch_res[13] & 2) { 1126 ivar->timing = bus_timing_hs; 1127 ivar->hs_tran_speed = 50000000; 1128 } 1129 } 1130 mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); 1131 mmc_app_decode_sd_status(ivar->raw_sd_status, 1132 &ivar->sd_status); 1133 if (ivar->sd_status.au_size != 0) { 1134 ivar->erase_sector = 1135 16 << ivar->sd_status.au_size; 1136 } 1137 mmc_select_card(sc, 0); 1138 /* Find max supported bus width. */ 1139 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1140 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1141 ivar->bus_width = bus_width_4; 1142 if (newcard) { 1143 /* Add device. */ 1144 child = device_add_child(sc->dev, NULL, -1); 1145 device_set_ivars(child, ivar); 1146 } 1147 return; 1148 } 1149 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1150 ivar->rca = rca++; 1151 mmc_set_relative_addr(sc, ivar->rca); 1152 /* Get card CSD. */ 1153 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1154 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1155 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1156 ivar->tran_speed = ivar->csd.tran_speed; 1157 ivar->erase_sector = ivar->csd.erase_sector * 1158 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1159 /* Only MMC >= 4.x cards support EXT_CSD. */ 1160 if (ivar->csd.spec_vers >= 4) { 1161 /* Card must be selected to fetch EXT_CSD. */ 1162 mmc_select_card(sc, ivar->rca); 1163 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1164 /* Handle extended capacity from EXT_CSD */ 1165 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1166 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1167 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1168 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1169 if (sec_count != 0) { 1170 ivar->sec_count = sec_count; 1171 ivar->high_cap = 1; 1172 } 1173 /* Get card speed in high speed mode. */ 1174 ivar->timing = bus_timing_hs; 1175 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1176 & EXT_CSD_CARD_TYPE_52) 1177 ivar->hs_tran_speed = 52000000; 1178 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1179 & EXT_CSD_CARD_TYPE_26) 1180 ivar->hs_tran_speed = 26000000; 1181 else 1182 ivar->hs_tran_speed = ivar->tran_speed; 1183 /* Find max supported bus width. */ 1184 ivar->bus_width = mmc_test_bus_width(sc); 1185 mmc_select_card(sc, 0); 1186 /* Handle HC erase sector size. */ 1187 if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) { 1188 ivar->erase_sector = 1024 * 1189 ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE]; 1190 mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 1191 EXT_CSD_ERASE_GRP_DEF, 1); 1192 } 1193 } else { 1194 ivar->bus_width = bus_width_1; 1195 ivar->timing = bus_timing_normal; 1196 } 1197 if (newcard) { 1198 /* Add device. */ 1199 child = device_add_child(sc->dev, NULL, -1); 1200 device_set_ivars(child, ivar); 1201 } 1202 } 1203} 1204 1205static void 1206mmc_rescan_cards(struct mmc_softc *sc) 1207{ 1208 struct mmc_ivars *ivar = NULL; 1209 device_t *devlist; 1210 int err, i, devcount; 1211 1212 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1213 return; 1214 for (i = 0; i < devcount; i++) { 1215 ivar = device_get_ivars(devlist[i]); 1216 if (mmc_select_card(sc, ivar->rca)) { 1217 device_delete_child(sc->dev, devlist[i]); 1218 free(ivar, M_DEVBUF); 1219 } 1220 } 1221 free(devlist, M_TEMP); 1222 mmc_select_card(sc, 0); 1223} 1224 1225static int 1226mmc_delete_cards(struct mmc_softc *sc) 1227{ 1228 struct mmc_ivars *ivar; 1229 device_t *devlist; 1230 int err, i, devcount; 1231 1232 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1233 return (err); 1234 for (i = 0; i < devcount; i++) { 1235 ivar = device_get_ivars(devlist[i]); 1236 device_delete_child(sc->dev, devlist[i]); 1237 free(ivar, M_DEVBUF); 1238 } 1239 free(devlist, M_TEMP); 1240 return (0); 1241} 1242 1243static void 1244mmc_go_discovery(struct mmc_softc *sc) 1245{ 1246 uint32_t ocr; 1247 device_t dev; 1248 int err; 1249 1250 dev = sc->dev; 1251 if (mmcbr_get_power_mode(dev) != power_on) { 1252 /* 1253 * First, try SD modes 1254 */ 1255 mmcbr_set_mode(dev, mode_sd); 1256 mmc_power_up(sc); 1257 mmcbr_set_bus_mode(dev, pushpull); 1258 if (bootverbose) 1259 device_printf(sc->dev, "Idle cards for SD probe\n"); 1260 mmc_idle_cards(sc); 1261 err = mmc_send_if_cond(sc, 1); 1262 if (bootverbose) 1263 device_printf(sc->dev, "SD: SEND_IF_CONF %d\n", err); 1264 if (mmc_send_app_op_cond(sc, err ? 0 : MMC_OCR_CCS, &ocr) != 1265 MMC_ERR_NONE) { 1266 /* 1267 * Failed, try MMC 1268 */ 1269 mmcbr_set_mode(dev, mode_mmc); 1270 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) 1271 ocr = 0; /* Failed both, powerdown. */ 1272 } 1273 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1274 if (mmcbr_get_ocr(dev) != 0) 1275 mmc_idle_cards(sc); 1276 } else { 1277 mmcbr_set_bus_mode(dev, opendrain); 1278 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1279 mmcbr_update_ios(dev); 1280 /* XXX recompute vdd based on new cards? */ 1281 } 1282 /* 1283 * Make sure that we have a mutually agreeable voltage to at least 1284 * one card on the bus. 1285 */ 1286 if (mmcbr_get_ocr(dev) == 0) { 1287 mmc_delete_cards(sc); 1288 mmc_power_down(sc); 1289 return; 1290 } 1291 /* 1292 * Reselect the cards after we've idled them above. 1293 */ 1294 if (mmcbr_get_mode(dev) == mode_sd) { 1295 err = mmc_send_if_cond(sc, 1); 1296 mmc_send_app_op_cond(sc, 1297 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1298 } else 1299 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1300 mmc_discover_cards(sc); 1301 mmc_rescan_cards(sc); 1302 1303 mmcbr_set_bus_mode(dev, pushpull); 1304 mmcbr_update_ios(dev); 1305 mmc_calculate_clock(sc); 1306 bus_generic_attach(dev); 1307/* mmc_update_children_sysctl(dev);*/ 1308} 1309 1310static int 1311mmc_calculate_clock(struct mmc_softc *sc) 1312{ 1313 int max_dtr, max_hs_dtr, max_timing; 1314 int nkid, i, f_min, f_max; 1315 device_t *kids; 1316 struct mmc_ivars *ivar; 1317 1318 f_min = mmcbr_get_f_min(sc->dev); 1319 f_max = mmcbr_get_f_max(sc->dev); 1320 max_dtr = max_hs_dtr = f_max; 1321 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1322 max_timing = bus_timing_hs; 1323 else 1324 max_timing = bus_timing_normal; 1325 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1326 panic("can't get children"); 1327 for (i = 0; i < nkid; i++) { 1328 ivar = device_get_ivars(kids[i]); 1329 if (ivar->timing < max_timing) 1330 max_timing = ivar->timing; 1331 if (ivar->tran_speed < max_dtr) 1332 max_dtr = ivar->tran_speed; 1333 if (ivar->hs_tran_speed < max_hs_dtr) 1334 max_hs_dtr = ivar->hs_tran_speed; 1335 } 1336 for (i = 0; i < nkid; i++) { 1337 ivar = device_get_ivars(kids[i]); 1338 if (ivar->timing == bus_timing_normal) 1339 continue; 1340 mmc_select_card(sc, ivar->rca); 1341 mmc_set_timing(sc, max_timing); 1342 } 1343 mmc_select_card(sc, 0); 1344 free(kids, M_TEMP); 1345 if (max_timing == bus_timing_hs) 1346 max_dtr = max_hs_dtr; 1347 if (bootverbose) { 1348 device_printf(sc->dev, 1349 "setting transfer rate to %d.%03dMHz%s\n", 1350 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1351 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1352 } 1353 mmcbr_set_timing(sc->dev, max_timing); 1354 mmcbr_set_clock(sc->dev, max_dtr); 1355 mmcbr_update_ios(sc->dev); 1356 return max_dtr; 1357} 1358 1359static void 1360mmc_scan(struct mmc_softc *sc) 1361{ 1362 device_t dev = sc->dev; 1363 1364 mmc_acquire_bus(dev, dev); 1365 mmc_go_discovery(sc); 1366 mmc_release_bus(dev, dev); 1367} 1368 1369static int 1370mmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 1371{ 1372 struct mmc_ivars *ivar = device_get_ivars(child); 1373 1374 switch (which) { 1375 default: 1376 return (EINVAL); 1377 case MMC_IVAR_DSR_IMP: 1378 *(int *)result = ivar->csd.dsr_imp; 1379 break; 1380 case MMC_IVAR_MEDIA_SIZE: 1381 *(off_t *)result = ivar->sec_count; 1382 break; 1383 case MMC_IVAR_RCA: 1384 *(int *)result = ivar->rca; 1385 break; 1386 case MMC_IVAR_SECTOR_SIZE: 1387 *(int *)result = MMC_SECTOR_SIZE; 1388 break; 1389 case MMC_IVAR_TRAN_SPEED: 1390 *(int *)result = mmcbr_get_clock(bus); 1391 break; 1392 case MMC_IVAR_READ_ONLY: 1393 *(int *)result = ivar->read_only; 1394 break; 1395 case MMC_IVAR_HIGH_CAP: 1396 *(int *)result = ivar->high_cap; 1397 break; 1398 case MMC_IVAR_CARD_TYPE: 1399 *(int *)result = ivar->mode; 1400 break; 1401 case MMC_IVAR_BUS_WIDTH: 1402 *(int *)result = ivar->bus_width; 1403 break; 1404 case MMC_IVAR_ERASE_SECTOR: 1405 *(int *)result = ivar->erase_sector; 1406 break; 1407 case MMC_IVAR_MAX_DATA: 1408 *(int *)result = mmcbr_get_max_data(bus); 1409 break; 1410 } 1411 return (0); 1412} 1413 1414static int 1415mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1416{ 1417 /* 1418 * None are writable ATM 1419 */ 1420 return (EINVAL); 1421} 1422 1423 1424static void 1425mmc_delayed_attach(void *xsc) 1426{ 1427 struct mmc_softc *sc = xsc; 1428 1429 mmc_scan(sc); 1430 config_intrhook_disestablish(&sc->config_intrhook); 1431} 1432 1433static device_method_t mmc_methods[] = { 1434 /* device_if */ 1435 DEVMETHOD(device_probe, mmc_probe), 1436 DEVMETHOD(device_attach, mmc_attach), 1437 DEVMETHOD(device_detach, mmc_detach), 1438 DEVMETHOD(device_suspend, mmc_suspend), 1439 DEVMETHOD(device_resume, mmc_resume), 1440 1441 /* Bus interface */ 1442 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1443 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1444 1445 /* MMC Bus interface */ 1446 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1447 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1448 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1449 1450 {0, 0}, 1451}; 1452 1453static driver_t mmc_driver = { 1454 "mmc", 1455 mmc_methods, 1456 sizeof(struct mmc_softc), 1457}; 1458static devclass_t mmc_devclass; 1459 1460 1461DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 1462DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, 0, 0); 1463