mmc.c revision 196037
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 196037 2009-08-02 14:28:40Z attilio $"); 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#include <sys/sysctl.h> 66 67#include <dev/mmc/mmcreg.h> 68#include <dev/mmc/mmcbrvar.h> 69#include <dev/mmc/mmcvar.h> 70#include "mmcbr_if.h" 71#include "mmcbus_if.h" 72 73struct mmc_softc { 74 device_t dev; 75 struct mtx sc_mtx; 76 struct intr_config_hook config_intrhook; 77 device_t owner; 78 uint32_t last_rca; 79}; 80 81/* 82 * Per-card data 83 */ 84struct mmc_ivars { 85 uint32_t raw_cid[4]; /* Raw bits of the CID */ 86 uint32_t raw_csd[4]; /* Raw bits of the CSD */ 87 uint32_t raw_scr[2]; /* Raw bits of the SCR */ 88 uint8_t raw_ext_csd[512]; /* Raw bits of the EXT_CSD */ 89 uint32_t raw_sd_status[16]; /* Raw bits of the SD_STATUS */ 90 uint16_t rca; 91 enum mmc_card_mode mode; 92 struct mmc_cid cid; /* cid decoded */ 93 struct mmc_csd csd; /* csd decoded */ 94 struct mmc_scr scr; /* scr decoded */ 95 struct mmc_sd_status sd_status; /* SD_STATUS decoded */ 96 u_char read_only; /* True when the device is read-only */ 97 u_char bus_width; /* Bus width to use */ 98 u_char timing; /* Bus timing support */ 99 u_char high_cap; /* High Capacity card (block addressed) */ 100 uint32_t sec_count; /* Card capacity in 512byte blocks */ 101 uint32_t tran_speed; /* Max speed in normal mode */ 102 uint32_t hs_tran_speed; /* Max speed in high speed mode */ 103 uint32_t erase_sector; /* Card native erase sector size */ 104}; 105 106#define CMD_RETRIES 3 107 108SYSCTL_NODE(_hw, OID_AUTO, mmc, CTLFLAG_RD, NULL, "mmc driver"); 109 110static int mmc_debug; 111SYSCTL_INT(_hw_mmc, OID_AUTO, debug, CTLFLAG_RW, &mmc_debug, 0, "Debug level"); 112 113/* bus entry points */ 114static int mmc_probe(device_t dev); 115static int mmc_attach(device_t dev); 116static int mmc_detach(device_t dev); 117static int mmc_suspend(device_t dev); 118static int mmc_resume(device_t dev); 119 120#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 121#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 122#define MMC_LOCK_INIT(_sc) \ 123 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 124 "mmc", MTX_DEF) 125#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 126#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 127#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 128 129static int mmc_calculate_clock(struct mmc_softc *sc); 130static void mmc_delayed_attach(void *); 131static void mmc_power_down(struct mmc_softc *sc); 132static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 133 int retries); 134static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 135 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 136static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 137static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 138static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 139static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 140static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 141static void mmc_scan(struct mmc_softc *sc); 142static int mmc_delete_cards(struct mmc_softc *sc); 143 144static void 145mmc_ms_delay(int ms) 146{ 147 DELAY(1000 * ms); /* XXX BAD */ 148} 149 150static int 151mmc_probe(device_t dev) 152{ 153 154 device_set_desc(dev, "MMC/SD bus"); 155 return (0); 156} 157 158static int 159mmc_attach(device_t dev) 160{ 161 struct mmc_softc *sc; 162 163 sc = device_get_softc(dev); 164 sc->dev = dev; 165 MMC_LOCK_INIT(sc); 166 167 /* We'll probe and attach our children later, but before / mount */ 168 sc->config_intrhook.ich_func = mmc_delayed_attach; 169 sc->config_intrhook.ich_arg = sc; 170 if (config_intrhook_establish(&sc->config_intrhook) != 0) 171 device_printf(dev, "config_intrhook_establish failed\n"); 172 return (0); 173} 174 175static int 176mmc_detach(device_t dev) 177{ 178 struct mmc_softc *sc = device_get_softc(dev); 179 int err; 180 181 if ((err = mmc_delete_cards(sc)) != 0) 182 return (err); 183 mmc_power_down(sc); 184 MMC_LOCK_DESTROY(sc); 185 186 return (0); 187} 188 189static int 190mmc_suspend(device_t dev) 191{ 192 struct mmc_softc *sc = device_get_softc(dev); 193 int err; 194 195 err = bus_generic_suspend(dev); 196 if (err) 197 return (err); 198 mmc_power_down(sc); 199 return (0); 200} 201 202static int 203mmc_resume(device_t dev) 204{ 205 struct mmc_softc *sc = device_get_softc(dev); 206 207 mmc_scan(sc); 208 return (bus_generic_resume(dev)); 209} 210 211static int 212mmc_acquire_bus(device_t busdev, device_t dev) 213{ 214 struct mmc_softc *sc; 215 struct mmc_ivars *ivar; 216 int err; 217 int rca; 218 219 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 220 if (err) 221 return (err); 222 sc = device_get_softc(busdev); 223 MMC_LOCK(sc); 224 if (sc->owner) 225 panic("mmc: host bridge didn't seralize us."); 226 sc->owner = dev; 227 MMC_UNLOCK(sc); 228 229 if (busdev != dev) { 230 /* 231 * Keep track of the last rca that we've selected. If 232 * we're asked to do it again, don't. We never 233 * unselect unless the bus code itself wants the mmc 234 * bus, and constantly reselecting causes problems. 235 */ 236 rca = mmc_get_rca(dev); 237 if (sc->last_rca != rca) { 238 mmc_select_card(sc, rca); 239 sc->last_rca = rca; 240 /* Prepare bus width for the new card. */ 241 ivar = device_get_ivars(dev); 242 if (bootverbose || mmc_debug) { 243 device_printf(busdev, 244 "setting bus width to %d bits\n", 245 (ivar->bus_width == bus_width_4) ? 4 : 246 (ivar->bus_width == bus_width_8) ? 8 : 1); 247 } 248 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 249 mmcbr_set_bus_width(busdev, ivar->bus_width); 250 mmcbr_update_ios(busdev); 251 } 252 } else { 253 /* 254 * If there's a card selected, stand down. 255 */ 256 if (sc->last_rca != 0) { 257 mmc_select_card(sc, 0); 258 sc->last_rca = 0; 259 } 260 } 261 262 return (0); 263} 264 265static int 266mmc_release_bus(device_t busdev, device_t dev) 267{ 268 struct mmc_softc *sc; 269 int err; 270 271 sc = device_get_softc(busdev); 272 273 MMC_LOCK(sc); 274 if (!sc->owner) 275 panic("mmc: releasing unowned bus."); 276 if (sc->owner != dev) 277 panic("mmc: you don't own the bus. game over."); 278 MMC_UNLOCK(sc); 279 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 280 if (err) 281 return (err); 282 MMC_LOCK(sc); 283 sc->owner = NULL; 284 MMC_UNLOCK(sc); 285 return (0); 286} 287 288static uint32_t 289mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 290{ 291 292 return (ocr & MMC_OCR_VOLTAGE); 293} 294 295static int 296mmc_highest_voltage(uint32_t ocr) 297{ 298 int i; 299 300 for (i = 30; i >= 0; i--) 301 if (ocr & (1 << i)) 302 return (i); 303 return (-1); 304} 305 306static void 307mmc_wakeup(struct mmc_request *req) 308{ 309 struct mmc_softc *sc; 310 311 sc = (struct mmc_softc *)req->done_data; 312 MMC_LOCK(sc); 313 req->flags |= MMC_REQ_DONE; 314 MMC_UNLOCK(sc); 315 wakeup(req); 316} 317 318static int 319mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 320{ 321 322 req->done = mmc_wakeup; 323 req->done_data = sc; 324 if (mmc_debug > 1) { 325 device_printf(sc->dev, "REQUEST: CMD%d arg %#x flags %#x", 326 req->cmd->opcode, req->cmd->arg, req->cmd->flags); 327 if (req->cmd->data) { 328 printf(" data %d\n", (int)req->cmd->data->len); 329 } else 330 printf("\n"); 331 } 332 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 333 MMC_LOCK(sc); 334 while ((req->flags & MMC_REQ_DONE) == 0) 335 msleep(req, &sc->sc_mtx, 0, "mmcreq", 0); 336 MMC_UNLOCK(sc); 337 if (mmc_debug > 2 || (mmc_debug > 1 && req->cmd->error)) 338 device_printf(sc->dev, "RESULT: %d\n", req->cmd->error); 339 return (0); 340} 341 342static int 343mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 344{ 345 struct mmc_softc *sc = device_get_softc(brdev); 346 347 return (mmc_wait_for_req(sc, req)); 348} 349 350static int 351mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 352{ 353 struct mmc_request mreq; 354 355 memset(&mreq, 0, sizeof(mreq)); 356 memset(cmd->resp, 0, sizeof(cmd->resp)); 357 cmd->retries = retries; 358 mreq.cmd = cmd; 359 mmc_wait_for_req(sc, &mreq); 360 return (cmd->error); 361} 362 363static int 364mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 365 struct mmc_command *cmd, int retries) 366{ 367 struct mmc_command appcmd; 368 int err = MMC_ERR_NONE, i; 369 370 for (i = 0; i <= retries; i++) { 371 appcmd.opcode = MMC_APP_CMD; 372 appcmd.arg = rca << 16; 373 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 374 appcmd.data = NULL; 375 mmc_wait_for_cmd(sc, &appcmd, 0); 376 err = appcmd.error; 377 if (err != MMC_ERR_NONE) 378 continue; 379 if (!(appcmd.resp[0] & R1_APP_CMD)) 380 return MMC_ERR_FAILED; 381 mmc_wait_for_cmd(sc, cmd, 0); 382 err = cmd->error; 383 if (err == MMC_ERR_NONE) 384 break; 385 } 386 return (err); 387} 388 389static int 390mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 391 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 392{ 393 struct mmc_command cmd; 394 int err; 395 396 memset(&cmd, 0, sizeof(cmd)); 397 cmd.opcode = opcode; 398 cmd.arg = arg; 399 cmd.flags = flags; 400 cmd.data = NULL; 401 err = mmc_wait_for_cmd(sc, &cmd, retries); 402 if (err) 403 return (err); 404 if (cmd.error) 405 return (cmd.error); 406 if (resp) { 407 if (flags & MMC_RSP_136) 408 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 409 else 410 *resp = cmd.resp[0]; 411 } 412 return (0); 413} 414 415static void 416mmc_idle_cards(struct mmc_softc *sc) 417{ 418 device_t dev; 419 struct mmc_command cmd; 420 421 dev = sc->dev; 422 mmcbr_set_chip_select(dev, cs_high); 423 mmcbr_update_ios(dev); 424 mmc_ms_delay(1); 425 426 memset(&cmd, 0, sizeof(cmd)); 427 cmd.opcode = MMC_GO_IDLE_STATE; 428 cmd.arg = 0; 429 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 430 cmd.data = NULL; 431 mmc_wait_for_cmd(sc, &cmd, 0); 432 mmc_ms_delay(1); 433 434 mmcbr_set_chip_select(dev, cs_dontcare); 435 mmcbr_update_ios(dev); 436 mmc_ms_delay(1); 437} 438 439static int 440mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 441{ 442 struct mmc_command cmd; 443 int err = MMC_ERR_NONE, i; 444 445 memset(&cmd, 0, sizeof(cmd)); 446 cmd.opcode = ACMD_SD_SEND_OP_COND; 447 cmd.arg = ocr; 448 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 449 cmd.data = NULL; 450 451 for (i = 0; i < 100; i++) { 452 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 453 if (err != MMC_ERR_NONE) 454 break; 455 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 456 (ocr & MMC_OCR_VOLTAGE) == 0) 457 break; 458 err = MMC_ERR_TIMEOUT; 459 mmc_ms_delay(10); 460 } 461 if (rocr && err == MMC_ERR_NONE) 462 *rocr = cmd.resp[0]; 463 return (err); 464} 465 466static int 467mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 468{ 469 struct mmc_command cmd; 470 int err = MMC_ERR_NONE, i; 471 472 memset(&cmd, 0, sizeof(cmd)); 473 cmd.opcode = MMC_SEND_OP_COND; 474 cmd.arg = ocr; 475 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 476 cmd.data = NULL; 477 478 for (i = 0; i < 100; i++) { 479 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 480 if (err != MMC_ERR_NONE) 481 break; 482 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 483 (ocr & MMC_OCR_VOLTAGE) == 0) 484 break; 485 err = MMC_ERR_TIMEOUT; 486 mmc_ms_delay(10); 487 } 488 if (rocr && err == MMC_ERR_NONE) 489 *rocr = cmd.resp[0]; 490 return (err); 491} 492 493static int 494mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 495{ 496 struct mmc_command cmd; 497 int err; 498 499 memset(&cmd, 0, sizeof(cmd)); 500 cmd.opcode = SD_SEND_IF_COND; 501 cmd.arg = (vhs << 8) + 0xAA; 502 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 503 cmd.data = NULL; 504 505 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 506 return (err); 507} 508 509static void 510mmc_power_up(struct mmc_softc *sc) 511{ 512 device_t dev; 513 514 dev = sc->dev; 515 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 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_up); 520 mmcbr_set_clock(dev, 0); 521 mmcbr_update_ios(dev); 522 mmc_ms_delay(1); 523 524 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 525 mmcbr_set_timing(dev, bus_timing_normal); 526 mmcbr_set_power_mode(dev, power_on); 527 mmcbr_update_ios(dev); 528 mmc_ms_delay(2); 529} 530 531static void 532mmc_power_down(struct mmc_softc *sc) 533{ 534 device_t dev = sc->dev; 535 536 mmcbr_set_bus_mode(dev, opendrain); 537 mmcbr_set_chip_select(dev, cs_dontcare); 538 mmcbr_set_bus_width(dev, bus_width_1); 539 mmcbr_set_power_mode(dev, power_off); 540 mmcbr_set_clock(dev, 0); 541 mmcbr_set_timing(dev, bus_timing_normal); 542 mmcbr_update_ios(dev); 543} 544 545static int 546mmc_select_card(struct mmc_softc *sc, uint16_t rca) 547{ 548 int flags; 549 550 flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; 551 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16, 552 flags, NULL, CMD_RETRIES)); 553} 554 555static int 556mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 557{ 558 struct mmc_command cmd; 559 int err; 560 561 cmd.opcode = MMC_SWITCH_FUNC; 562 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 563 (index << 16) | 564 (value << 8) | 565 set; 566 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 567 cmd.data = NULL; 568 err = mmc_wait_for_cmd(sc, &cmd, 0); 569 return (err); 570} 571 572static int 573mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, 574 uint8_t *res) 575{ 576 int err; 577 struct mmc_command cmd; 578 struct mmc_data data; 579 580 memset(&cmd, 0, sizeof(struct mmc_command)); 581 memset(&data, 0, sizeof(struct mmc_data)); 582 memset(res, 0, 64); 583 584 cmd.opcode = SD_SWITCH_FUNC; 585 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 586 cmd.arg = mode << 31; /* 0 - check, 1 - set */ 587 cmd.arg |= 0x00FFFFFF; 588 cmd.arg &= ~(0xF << (grp * 4)); 589 cmd.arg |= value << (grp * 4); 590 cmd.data = &data; 591 592 data.data = res; 593 data.len = 64; 594 data.flags = MMC_DATA_READ; 595 596 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 597 return (err); 598} 599 600static int 601mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 602{ 603 struct mmc_command cmd; 604 int err; 605 uint8_t value; 606 607 if (mmcbr_get_mode(sc->dev) == mode_sd) { 608 memset(&cmd, 0, sizeof(struct mmc_command)); 609 cmd.opcode = ACMD_SET_BUS_WIDTH; 610 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 611 switch (width) { 612 case bus_width_1: 613 cmd.arg = SD_BUS_WIDTH_1; 614 break; 615 case bus_width_4: 616 cmd.arg = SD_BUS_WIDTH_4; 617 break; 618 default: 619 return (MMC_ERR_INVALID); 620 } 621 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 622 } else { 623 switch (width) { 624 case bus_width_1: 625 value = EXT_CSD_BUS_WIDTH_1; 626 break; 627 case bus_width_4: 628 value = EXT_CSD_BUS_WIDTH_4; 629 break; 630 case bus_width_8: 631 value = EXT_CSD_BUS_WIDTH_8; 632 break; 633 default: 634 return (MMC_ERR_INVALID); 635 } 636 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 637 value); 638 } 639 return (err); 640} 641 642static int 643mmc_set_timing(struct mmc_softc *sc, int timing) 644{ 645 int err; 646 uint8_t value; 647 u_char switch_res[64]; 648 649 switch (timing) { 650 case bus_timing_normal: 651 value = 0; 652 break; 653 case bus_timing_hs: 654 value = 1; 655 break; 656 default: 657 return (MMC_ERR_INVALID); 658 } 659 if (mmcbr_get_mode(sc->dev) == mode_sd) 660 err = mmc_sd_switch(sc, SD_SWITCH_MODE_SET, SD_SWITCH_GROUP1, 661 value, switch_res); 662 else 663 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 664 EXT_CSD_HS_TIMING, value); 665 return (err); 666} 667 668static int 669mmc_test_bus_width(struct mmc_softc *sc) 670{ 671 struct mmc_command cmd; 672 struct mmc_data data; 673 int err; 674 uint8_t buf[8]; 675 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 676 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 677 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 678 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 679 680 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 681 mmcbr_set_bus_width(sc->dev, bus_width_8); 682 mmcbr_update_ios(sc->dev); 683 684 cmd.opcode = MMC_BUSTEST_W; 685 cmd.arg = 0; 686 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 687 cmd.data = &data; 688 689 data.data = p8; 690 data.len = 8; 691 data.flags = MMC_DATA_WRITE; 692 mmc_wait_for_cmd(sc, &cmd, 0); 693 694 cmd.opcode = MMC_BUSTEST_R; 695 cmd.arg = 0; 696 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 697 cmd.data = &data; 698 699 data.data = buf; 700 data.len = 8; 701 data.flags = MMC_DATA_READ; 702 err = mmc_wait_for_cmd(sc, &cmd, 0); 703 704 mmcbr_set_bus_width(sc->dev, bus_width_1); 705 mmcbr_update_ios(sc->dev); 706 707 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 708 return (bus_width_8); 709 } 710 711 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 712 mmcbr_set_bus_width(sc->dev, bus_width_4); 713 mmcbr_update_ios(sc->dev); 714 715 cmd.opcode = MMC_BUSTEST_W; 716 cmd.arg = 0; 717 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 718 cmd.data = &data; 719 720 data.data = p4; 721 data.len = 4; 722 data.flags = MMC_DATA_WRITE; 723 mmc_wait_for_cmd(sc, &cmd, 0); 724 725 cmd.opcode = MMC_BUSTEST_R; 726 cmd.arg = 0; 727 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 728 cmd.data = &data; 729 730 data.data = buf; 731 data.len = 4; 732 data.flags = MMC_DATA_READ; 733 err = mmc_wait_for_cmd(sc, &cmd, 0); 734 735 mmcbr_set_bus_width(sc->dev, bus_width_1); 736 mmcbr_update_ios(sc->dev); 737 738 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 739 return (bus_width_4); 740 } 741 return (bus_width_1); 742} 743 744static uint32_t 745mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) 746{ 747 const int i = (bit_len / 32) - (start / 32) - 1; 748 const int shift = start & 31; 749 uint32_t retval = bits[i] >> shift; 750 if (size + shift > 32) 751 retval |= bits[i - 1] << (32 - shift); 752 return (retval & ((1 << size) - 1)); 753} 754 755static void 756mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 757{ 758 int i; 759 760 /* There's no version info, so we take it on faith */ 761 memset(cid, 0, sizeof(*cid)); 762 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 763 cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); 764 for (i = 0; i < 5; i++) 765 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 766 cid->pnm[5] = 0; 767 cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); 768 cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); 769 cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2000; 770 cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); 771} 772 773static void 774mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 775{ 776 int i; 777 778 /* There's no version info, so we take it on faith */ 779 memset(cid, 0, sizeof(*cid)); 780 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 781 cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); 782 for (i = 0; i < 6; i++) 783 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 784 cid->pnm[6] = 0; 785 cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); 786 cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); 787 cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); 788 cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; 789} 790 791static const int exp[8] = { 792 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 793}; 794static const int mant[16] = { 795 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 796}; 797static const int cur_min[8] = { 798 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 799}; 800static const int cur_max[8] = { 801 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 802}; 803 804static void 805mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 806{ 807 int v; 808 int m; 809 int e; 810 811 memset(csd, 0, sizeof(*csd)); 812 csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); 813 if (v == 0) { 814 m = mmc_get_bits(raw_csd, 128, 115, 4); 815 e = mmc_get_bits(raw_csd, 128, 112, 3); 816 csd->tacc = exp[e] * mant[m] + 9 / 10; 817 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 818 m = mmc_get_bits(raw_csd, 128, 99, 4); 819 e = mmc_get_bits(raw_csd, 128, 96, 3); 820 csd->tran_speed = exp[e] * 10000 * mant[m]; 821 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 822 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 823 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 824 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 825 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 826 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 827 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 828 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 829 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 830 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 831 m = mmc_get_bits(raw_csd, 128, 62, 12); 832 e = mmc_get_bits(raw_csd, 128, 47, 3); 833 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 834 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 835 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 836 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 837 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 838 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 839 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 840 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 841 } else if (v == 1) { 842 m = mmc_get_bits(raw_csd, 128, 115, 4); 843 e = mmc_get_bits(raw_csd, 128, 112, 3); 844 csd->tacc = exp[e] * mant[m] + 9 / 10; 845 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 846 m = mmc_get_bits(raw_csd, 128, 99, 4); 847 e = mmc_get_bits(raw_csd, 128, 96, 3); 848 csd->tran_speed = exp[e] * 10000 * mant[m]; 849 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 850 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 851 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 852 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 853 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 854 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 855 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 856 512 * 1024; 857 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 858 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 859 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 860 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 861 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 862 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 863 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 864 } else 865 panic("unknown SD CSD version"); 866} 867 868static void 869mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 870{ 871 int m; 872 int e; 873 874 memset(csd, 0, sizeof(*csd)); 875 csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); 876 csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); 877 m = mmc_get_bits(raw_csd, 128, 115, 4); 878 e = mmc_get_bits(raw_csd, 128, 112, 3); 879 csd->tacc = exp[e] * mant[m] + 9 / 10; 880 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 881 m = mmc_get_bits(raw_csd, 128, 99, 4); 882 e = mmc_get_bits(raw_csd, 128, 96, 3); 883 csd->tran_speed = exp[e] * 10000 * mant[m]; 884 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 885 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 886 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 887 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 888 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 889 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 890 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 891 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 892 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 893 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 894 m = mmc_get_bits(raw_csd, 128, 62, 12); 895 e = mmc_get_bits(raw_csd, 128, 47, 3); 896 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 897 csd->erase_blk_en = 0; 898 csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * 899 (mmc_get_bits(raw_csd, 128, 37, 5) + 1); 900 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); 901 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 902 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 903 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 904 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 905} 906 907static void 908mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 909{ 910 unsigned int scr_struct; 911 912 memset(scr, 0, sizeof(*scr)); 913 914 scr_struct = mmc_get_bits(raw_scr, 64, 60, 4); 915 if (scr_struct != 0) { 916 printf("Unrecognised SCR structure version %d\n", 917 scr_struct); 918 return; 919 } 920 scr->sda_vsn = mmc_get_bits(raw_scr, 64, 56, 4); 921 scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); 922} 923 924static void 925mmc_app_decode_sd_status(uint32_t *raw_sd_status, 926 struct mmc_sd_status *sd_status) 927{ 928 929 memset(sd_status, 0, sizeof(*sd_status)); 930 931 sd_status->bus_width = mmc_get_bits(raw_sd_status, 512, 510, 2); 932 sd_status->secured_mode = mmc_get_bits(raw_sd_status, 512, 509, 1); 933 sd_status->card_type = mmc_get_bits(raw_sd_status, 512, 480, 16); 934 sd_status->prot_area = mmc_get_bits(raw_sd_status, 512, 448, 12); 935 sd_status->speed_class = mmc_get_bits(raw_sd_status, 512, 440, 8); 936 sd_status->perf_move = mmc_get_bits(raw_sd_status, 512, 432, 8); 937 sd_status->au_size = mmc_get_bits(raw_sd_status, 512, 428, 4); 938 sd_status->erase_size = mmc_get_bits(raw_sd_status, 512, 408, 16); 939 sd_status->erase_timeout = mmc_get_bits(raw_sd_status, 512, 402, 6); 940 sd_status->erase_offset = mmc_get_bits(raw_sd_status, 512, 400, 2); 941} 942 943static int 944mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 945{ 946 struct mmc_command cmd; 947 int err; 948 949 cmd.opcode = MMC_ALL_SEND_CID; 950 cmd.arg = 0; 951 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 952 cmd.data = NULL; 953 err = mmc_wait_for_cmd(sc, &cmd, 0); 954 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 955 return (err); 956} 957 958static int 959mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 960{ 961 struct mmc_command cmd; 962 int err; 963 964 cmd.opcode = MMC_SEND_CSD; 965 cmd.arg = rca << 16; 966 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 967 cmd.data = NULL; 968 err = mmc_wait_for_cmd(sc, &cmd, 0); 969 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 970 return (err); 971} 972 973static int 974mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 975{ 976 int err; 977 struct mmc_command cmd; 978 struct mmc_data data; 979 980 memset(&cmd, 0, sizeof(struct mmc_command)); 981 memset(&data, 0, sizeof(struct mmc_data)); 982 983 memset(rawscr, 0, 8); 984 cmd.opcode = ACMD_SEND_SCR; 985 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 986 cmd.arg = 0; 987 cmd.data = &data; 988 989 data.data = rawscr; 990 data.len = 8; 991 data.flags = MMC_DATA_READ; 992 993 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 994 rawscr[0] = be32toh(rawscr[0]); 995 rawscr[1] = be32toh(rawscr[1]); 996 return (err); 997} 998 999static int 1000mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 1001{ 1002 int err; 1003 struct mmc_command cmd; 1004 struct mmc_data data; 1005 1006 memset(&cmd, 0, sizeof(struct mmc_command)); 1007 memset(&data, 0, sizeof(struct mmc_data)); 1008 1009 memset(rawextcsd, 0, 512); 1010 cmd.opcode = MMC_SEND_EXT_CSD; 1011 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1012 cmd.arg = 0; 1013 cmd.data = &data; 1014 1015 data.data = rawextcsd; 1016 data.len = 512; 1017 data.flags = MMC_DATA_READ; 1018 1019 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 1020 return (err); 1021} 1022 1023static int 1024mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, uint32_t *rawsdstatus) 1025{ 1026 int err, i; 1027 struct mmc_command cmd; 1028 struct mmc_data data; 1029 1030 memset(&cmd, 0, sizeof(struct mmc_command)); 1031 memset(&data, 0, sizeof(struct mmc_data)); 1032 1033 memset(rawsdstatus, 0, 64); 1034 cmd.opcode = ACMD_SD_STATUS; 1035 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1036 cmd.arg = 0; 1037 cmd.data = &data; 1038 1039 data.data = rawsdstatus; 1040 data.len = 64; 1041 data.flags = MMC_DATA_READ; 1042 1043 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1044 for (i = 0; i < 16; i++) 1045 rawsdstatus[i] = be32toh(rawsdstatus[i]); 1046 return (err); 1047} 1048 1049static int 1050mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 1051{ 1052 struct mmc_command cmd; 1053 int err; 1054 1055 cmd.opcode = MMC_SET_RELATIVE_ADDR; 1056 cmd.arg = resp << 16; 1057 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1058 cmd.data = NULL; 1059 err = mmc_wait_for_cmd(sc, &cmd, 0); 1060 return (err); 1061} 1062 1063static int 1064mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1065{ 1066 struct mmc_command cmd; 1067 int err; 1068 1069 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1070 cmd.arg = 0; 1071 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1072 cmd.data = NULL; 1073 err = mmc_wait_for_cmd(sc, &cmd, 0); 1074 *resp = cmd.resp[0]; 1075 return (err); 1076} 1077 1078static void 1079mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard) 1080{ 1081 device_printf(dev, "Card at relative address %d%s:\n", 1082 ivar->rca, newcard ? " added" : ""); 1083 device_printf(dev, " card: %s%s (0x%x/0x%x/\"%s\" rev %d.%d " 1084 "m/d %02d.%04d s/n %08x)\n", 1085 ivar->mode == mode_sd ? "SD" : "MMC", 1086 ivar->high_cap ? " High Capacity" : "", 1087 ivar->cid.mid, ivar->cid.oid, 1088 ivar->cid.pnm, ivar->cid.prv >> 4, ivar->cid.prv & 0x0f, 1089 ivar->cid.mdt_month, ivar->cid.mdt_year, ivar->cid.psn); 1090 device_printf(dev, " bus: %ubit, %uMHz%s\n", 1091 (ivar->bus_width == bus_width_1 ? 1 : 1092 (ivar->bus_width == bus_width_4 ? 4 : 8)), 1093 (ivar->timing == bus_timing_hs ? 1094 ivar->hs_tran_speed : ivar->tran_speed) / 1000000, 1095 ivar->timing == bus_timing_hs ? ", high speed timing" : ""); 1096 device_printf(dev, " memory: %u blocks, erase sector %u blocks%s\n", 1097 ivar->sec_count, ivar->erase_sector, 1098 ivar->read_only ? ", read-only" : ""); 1099} 1100 1101static void 1102mmc_discover_cards(struct mmc_softc *sc) 1103{ 1104 struct mmc_ivars *ivar = NULL; 1105 device_t *devlist; 1106 int err, i, devcount, newcard; 1107 uint32_t raw_cid[4]; 1108 uint32_t resp, sec_count; 1109 device_t child; 1110 uint16_t rca = 2; 1111 u_char switch_res[64]; 1112 1113 if (bootverbose || mmc_debug) 1114 device_printf(sc->dev, "Probing cards\n"); 1115 while (1) { 1116 err = mmc_all_send_cid(sc, raw_cid); 1117 if (err == MMC_ERR_TIMEOUT) 1118 break; 1119 if (err != MMC_ERR_NONE) { 1120 device_printf(sc->dev, "Error reading CID %d\n", err); 1121 break; 1122 } 1123 newcard = 1; 1124 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1125 return; 1126 for (i = 0; i < devcount; i++) { 1127 ivar = device_get_ivars(devlist[i]); 1128 if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) { 1129 newcard = 0; 1130 break; 1131 } 1132 } 1133 free(devlist, M_TEMP); 1134 if (bootverbose || mmc_debug) { 1135 device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n", 1136 newcard ? "New c" : "C", 1137 raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]); 1138 } 1139 if (newcard) { 1140 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1141 M_WAITOK | M_ZERO); 1142 if (!ivar) 1143 return; 1144 memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid)); 1145 } 1146 if (mmcbr_get_ro(sc->dev)) 1147 ivar->read_only = 1; 1148 ivar->bus_width = bus_width_1; 1149 ivar->timing = bus_timing_normal; 1150 ivar->mode = mmcbr_get_mode(sc->dev); 1151 if (ivar->mode == mode_sd) { 1152 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1153 mmc_send_relative_addr(sc, &resp); 1154 ivar->rca = resp >> 16; 1155 /* Get card CSD. */ 1156 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1157 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1158 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1159 if (ivar->csd.csd_structure > 0) 1160 ivar->high_cap = 1; 1161 ivar->tran_speed = ivar->csd.tran_speed; 1162 ivar->erase_sector = ivar->csd.erase_sector * 1163 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1164 /* Get card SCR. Card must be selected to fetch it. */ 1165 mmc_select_card(sc, ivar->rca); 1166 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1167 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1168 /* Get card switch capabilities (command class 10). */ 1169 if ((ivar->scr.sda_vsn >= 1) && 1170 (ivar->csd.ccc & (1<<10))) { 1171 mmc_sd_switch(sc, SD_SWITCH_MODE_CHECK, 1172 SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE, 1173 switch_res); 1174 if (switch_res[13] & 2) { 1175 ivar->timing = bus_timing_hs; 1176 ivar->hs_tran_speed = SD_MAX_HS; 1177 } 1178 } 1179 mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); 1180 mmc_app_decode_sd_status(ivar->raw_sd_status, 1181 &ivar->sd_status); 1182 if (ivar->sd_status.au_size != 0) { 1183 ivar->erase_sector = 1184 16 << ivar->sd_status.au_size; 1185 } 1186 mmc_select_card(sc, 0); 1187 /* Find max supported bus width. */ 1188 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1189 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1190 ivar->bus_width = bus_width_4; 1191 if (bootverbose || mmc_debug) 1192 mmc_log_card(sc->dev, ivar, newcard); 1193 if (newcard) { 1194 /* Add device. */ 1195 child = device_add_child(sc->dev, NULL, -1); 1196 device_set_ivars(child, ivar); 1197 } 1198 return; 1199 } 1200 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1201 ivar->rca = rca++; 1202 mmc_set_relative_addr(sc, ivar->rca); 1203 /* Get card CSD. */ 1204 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1205 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1206 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1207 ivar->tran_speed = ivar->csd.tran_speed; 1208 ivar->erase_sector = ivar->csd.erase_sector * 1209 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1210 /* Only MMC >= 4.x cards support EXT_CSD. */ 1211 if (ivar->csd.spec_vers >= 4) { 1212 /* Card must be selected to fetch EXT_CSD. */ 1213 mmc_select_card(sc, ivar->rca); 1214 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1215 /* Handle extended capacity from EXT_CSD */ 1216 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1217 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1218 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1219 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1220 if (sec_count != 0) { 1221 ivar->sec_count = sec_count; 1222 ivar->high_cap = 1; 1223 } 1224 /* Get card speed in high speed mode. */ 1225 ivar->timing = bus_timing_hs; 1226 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1227 & EXT_CSD_CARD_TYPE_52) 1228 ivar->hs_tran_speed = MMC_TYPE_52_MAX_HS; 1229 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1230 & EXT_CSD_CARD_TYPE_26) 1231 ivar->hs_tran_speed = MMC_TYPE_26_MAX_HS; 1232 else 1233 ivar->hs_tran_speed = ivar->tran_speed; 1234 /* Find max supported bus width. */ 1235 ivar->bus_width = mmc_test_bus_width(sc); 1236 mmc_select_card(sc, 0); 1237 /* Handle HC erase sector size. */ 1238 if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) { 1239 ivar->erase_sector = 1024 * 1240 ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE]; 1241 mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 1242 EXT_CSD_ERASE_GRP_DEF, 1); 1243 } 1244 } else { 1245 ivar->bus_width = bus_width_1; 1246 ivar->timing = bus_timing_normal; 1247 } 1248 if (bootverbose || mmc_debug) 1249 mmc_log_card(sc->dev, ivar, newcard); 1250 if (newcard) { 1251 /* Add device. */ 1252 child = device_add_child(sc->dev, NULL, -1); 1253 device_set_ivars(child, ivar); 1254 } 1255 } 1256} 1257 1258static void 1259mmc_rescan_cards(struct mmc_softc *sc) 1260{ 1261 struct mmc_ivars *ivar = NULL; 1262 device_t *devlist; 1263 int err, i, devcount; 1264 1265 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1266 return; 1267 for (i = 0; i < devcount; i++) { 1268 ivar = device_get_ivars(devlist[i]); 1269 if (mmc_select_card(sc, ivar->rca)) { 1270 if (bootverbose || mmc_debug) 1271 device_printf(sc->dev, "Card at relative address %d lost.\n", 1272 ivar->rca); 1273 device_delete_child(sc->dev, devlist[i]); 1274 free(ivar, M_DEVBUF); 1275 } 1276 } 1277 free(devlist, M_TEMP); 1278 mmc_select_card(sc, 0); 1279} 1280 1281static int 1282mmc_delete_cards(struct mmc_softc *sc) 1283{ 1284 struct mmc_ivars *ivar; 1285 device_t *devlist; 1286 int err, i, devcount; 1287 1288 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1289 return (err); 1290 for (i = 0; i < devcount; i++) { 1291 ivar = device_get_ivars(devlist[i]); 1292 if (bootverbose || mmc_debug) 1293 device_printf(sc->dev, "Card at relative address %d deleted.\n", 1294 ivar->rca); 1295 device_delete_child(sc->dev, devlist[i]); 1296 free(ivar, M_DEVBUF); 1297 } 1298 free(devlist, M_TEMP); 1299 return (0); 1300} 1301 1302static void 1303mmc_go_discovery(struct mmc_softc *sc) 1304{ 1305 uint32_t ocr; 1306 device_t dev; 1307 int err; 1308 1309 dev = sc->dev; 1310 if (mmcbr_get_power_mode(dev) != power_on) { 1311 /* 1312 * First, try SD modes 1313 */ 1314 mmcbr_set_mode(dev, mode_sd); 1315 mmc_power_up(sc); 1316 mmcbr_set_bus_mode(dev, pushpull); 1317 if (bootverbose || mmc_debug) 1318 device_printf(sc->dev, "Probing bus\n"); 1319 mmc_idle_cards(sc); 1320 err = mmc_send_if_cond(sc, 1); 1321 if ((bootverbose || mmc_debug) && err == 0) 1322 device_printf(sc->dev, "SD 2.0 interface conditions: OK\n"); 1323 if (mmc_send_app_op_cond(sc, err ? 0 : MMC_OCR_CCS, &ocr) != 1324 MMC_ERR_NONE) { 1325 if (bootverbose || mmc_debug) 1326 device_printf(sc->dev, "SD probe: failed\n"); 1327 /* 1328 * Failed, try MMC 1329 */ 1330 mmcbr_set_mode(dev, mode_mmc); 1331 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 1332 if (bootverbose || mmc_debug) 1333 device_printf(sc->dev, "MMC probe: failed\n"); 1334 ocr = 0; /* Failed both, powerdown. */ 1335 } else if (bootverbose || mmc_debug) 1336 device_printf(sc->dev, 1337 "MMC probe: OK (OCR: 0x%08x)\n", ocr); 1338 } else if (bootverbose || mmc_debug) 1339 device_printf(sc->dev, "SD probe: OK (OCR: 0x%08x)\n", ocr); 1340 1341 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1342 if (mmcbr_get_ocr(dev) != 0) 1343 mmc_idle_cards(sc); 1344 } else { 1345 mmcbr_set_bus_mode(dev, opendrain); 1346 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1347 mmcbr_update_ios(dev); 1348 /* XXX recompute vdd based on new cards? */ 1349 } 1350 /* 1351 * Make sure that we have a mutually agreeable voltage to at least 1352 * one card on the bus. 1353 */ 1354 if (bootverbose || mmc_debug) 1355 device_printf(sc->dev, "Current OCR: 0x%08x\n", mmcbr_get_ocr(dev)); 1356 if (mmcbr_get_ocr(dev) == 0) { 1357 mmc_delete_cards(sc); 1358 mmc_power_down(sc); 1359 return; 1360 } 1361 /* 1362 * Reselect the cards after we've idled them above. 1363 */ 1364 if (mmcbr_get_mode(dev) == mode_sd) { 1365 err = mmc_send_if_cond(sc, 1); 1366 mmc_send_app_op_cond(sc, 1367 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1368 } else 1369 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1370 mmc_discover_cards(sc); 1371 mmc_rescan_cards(sc); 1372 1373 mmcbr_set_bus_mode(dev, pushpull); 1374 mmcbr_update_ios(dev); 1375 mmc_calculate_clock(sc); 1376 bus_generic_attach(dev); 1377/* mmc_update_children_sysctl(dev);*/ 1378} 1379 1380static int 1381mmc_calculate_clock(struct mmc_softc *sc) 1382{ 1383 int max_dtr, max_hs_dtr, max_timing; 1384 int nkid, i, f_min, f_max; 1385 device_t *kids; 1386 struct mmc_ivars *ivar; 1387 1388 f_min = mmcbr_get_f_min(sc->dev); 1389 f_max = mmcbr_get_f_max(sc->dev); 1390 max_dtr = max_hs_dtr = f_max; 1391 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1392 max_timing = bus_timing_hs; 1393 else 1394 max_timing = bus_timing_normal; 1395 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1396 panic("can't get children"); 1397 for (i = 0; i < nkid; i++) { 1398 ivar = device_get_ivars(kids[i]); 1399 if (ivar->timing < max_timing) 1400 max_timing = ivar->timing; 1401 if (ivar->tran_speed < max_dtr) 1402 max_dtr = ivar->tran_speed; 1403 if (ivar->hs_tran_speed < max_hs_dtr) 1404 max_hs_dtr = ivar->hs_tran_speed; 1405 } 1406 for (i = 0; i < nkid; i++) { 1407 ivar = device_get_ivars(kids[i]); 1408 if (ivar->timing == bus_timing_normal) 1409 continue; 1410 mmc_select_card(sc, ivar->rca); 1411 mmc_set_timing(sc, max_timing); 1412 } 1413 mmc_select_card(sc, 0); 1414 free(kids, M_TEMP); 1415 if (max_timing == bus_timing_hs) 1416 max_dtr = max_hs_dtr; 1417 if (bootverbose || mmc_debug) { 1418 device_printf(sc->dev, 1419 "setting transfer rate to %d.%03dMHz%s\n", 1420 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1421 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1422 } 1423 mmcbr_set_timing(sc->dev, max_timing); 1424 mmcbr_set_clock(sc->dev, max_dtr); 1425 mmcbr_update_ios(sc->dev); 1426 return max_dtr; 1427} 1428 1429static void 1430mmc_scan(struct mmc_softc *sc) 1431{ 1432 device_t dev = sc->dev; 1433 1434 mmc_acquire_bus(dev, dev); 1435 mmc_go_discovery(sc); 1436 mmc_release_bus(dev, dev); 1437} 1438 1439static int 1440mmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) 1441{ 1442 struct mmc_ivars *ivar = device_get_ivars(child); 1443 1444 switch (which) { 1445 default: 1446 return (EINVAL); 1447 case MMC_IVAR_DSR_IMP: 1448 *(int *)result = ivar->csd.dsr_imp; 1449 break; 1450 case MMC_IVAR_MEDIA_SIZE: 1451 *(off_t *)result = ivar->sec_count; 1452 break; 1453 case MMC_IVAR_RCA: 1454 *(int *)result = ivar->rca; 1455 break; 1456 case MMC_IVAR_SECTOR_SIZE: 1457 *(int *)result = MMC_SECTOR_SIZE; 1458 break; 1459 case MMC_IVAR_TRAN_SPEED: 1460 *(int *)result = mmcbr_get_clock(bus); 1461 break; 1462 case MMC_IVAR_READ_ONLY: 1463 *(int *)result = ivar->read_only; 1464 break; 1465 case MMC_IVAR_HIGH_CAP: 1466 *(int *)result = ivar->high_cap; 1467 break; 1468 case MMC_IVAR_CARD_TYPE: 1469 *(int *)result = ivar->mode; 1470 break; 1471 case MMC_IVAR_BUS_WIDTH: 1472 *(int *)result = ivar->bus_width; 1473 break; 1474 case MMC_IVAR_ERASE_SECTOR: 1475 *(int *)result = ivar->erase_sector; 1476 break; 1477 case MMC_IVAR_MAX_DATA: 1478 *(int *)result = mmcbr_get_max_data(bus); 1479 break; 1480 } 1481 return (0); 1482} 1483 1484static int 1485mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1486{ 1487 /* 1488 * None are writable ATM 1489 */ 1490 return (EINVAL); 1491} 1492 1493 1494static void 1495mmc_delayed_attach(void *xsc) 1496{ 1497 struct mmc_softc *sc = xsc; 1498 1499 newbus_xlock(); 1500 mmc_scan(sc); 1501 newbus_xunlock(); 1502 config_intrhook_disestablish(&sc->config_intrhook); 1503} 1504 1505static device_method_t mmc_methods[] = { 1506 /* device_if */ 1507 DEVMETHOD(device_probe, mmc_probe), 1508 DEVMETHOD(device_attach, mmc_attach), 1509 DEVMETHOD(device_detach, mmc_detach), 1510 DEVMETHOD(device_suspend, mmc_suspend), 1511 DEVMETHOD(device_resume, mmc_resume), 1512 1513 /* Bus interface */ 1514 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1515 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1516 1517 /* MMC Bus interface */ 1518 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1519 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1520 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1521 1522 {0, 0}, 1523}; 1524 1525static driver_t mmc_driver = { 1526 "mmc", 1527 mmc_methods, 1528 sizeof(struct mmc_softc), 1529}; 1530static devclass_t mmc_devclass; 1531 1532 1533DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, NULL, NULL); 1534DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, NULL, NULL); 1535