mmc.c revision 187875
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 187875 2009-01-28 22:09:00Z mav $"); 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, 0, "mmc driver"); 109 110int 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) { 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 > 1 || (mmc_debug && 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, uint8_t *res) 574{ 575 int err; 576 struct mmc_command cmd; 577 struct mmc_data data; 578 579 memset(&cmd, 0, sizeof(struct mmc_command)); 580 memset(&data, 0, sizeof(struct mmc_data)); 581 582 memset(res, 0, 64); 583 cmd.opcode = SD_SWITCH_FUNC; 584 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 585 cmd.arg = mode << 31; 586 cmd.arg |= 0x00FFFFFF; 587 cmd.arg &= ~(0xF << (grp * 4)); 588 cmd.arg |= value << (grp * 4); 589 cmd.data = &data; 590 591 data.data = res; 592 data.len = 64; 593 data.flags = MMC_DATA_READ; 594 595 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 596 return (err); 597} 598 599static int 600mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 601{ 602 struct mmc_command cmd; 603 int err; 604 uint8_t value; 605 606 if (mmcbr_get_mode(sc->dev) == mode_sd) { 607 memset(&cmd, 0, sizeof(struct mmc_command)); 608 cmd.opcode = ACMD_SET_BUS_WIDTH; 609 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 610 switch (width) { 611 case bus_width_1: 612 cmd.arg = SD_BUS_WIDTH_1; 613 break; 614 case bus_width_4: 615 cmd.arg = SD_BUS_WIDTH_4; 616 break; 617 default: 618 return (MMC_ERR_INVALID); 619 } 620 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 621 } else { 622 switch (width) { 623 case bus_width_1: 624 value = EXT_CSD_BUS_WIDTH_1; 625 break; 626 case bus_width_4: 627 value = EXT_CSD_BUS_WIDTH_4; 628 break; 629 case bus_width_8: 630 value = EXT_CSD_BUS_WIDTH_8; 631 break; 632 default: 633 return (MMC_ERR_INVALID); 634 } 635 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 636 value); 637 } 638 return (err); 639} 640 641static int 642mmc_set_timing(struct mmc_softc *sc, int timing) 643{ 644 int err; 645 uint8_t value; 646 u_char switch_res[64]; 647 648 switch (timing) { 649 case bus_timing_normal: 650 value = 0; 651 break; 652 case bus_timing_hs: 653 value = 1; 654 break; 655 default: 656 return (MMC_ERR_INVALID); 657 } 658 if (mmcbr_get_mode(sc->dev) == mode_sd) 659 err = mmc_sd_switch(sc, 1, 0, value, switch_res); 660 else 661 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 662 EXT_CSD_HS_TIMING, value); 663 return (err); 664} 665 666static int 667mmc_test_bus_width(struct mmc_softc *sc) 668{ 669 struct mmc_command cmd; 670 struct mmc_data data; 671 int err; 672 uint8_t buf[8]; 673 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 674 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 675 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 676 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 677 678 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 679 mmcbr_set_bus_width(sc->dev, bus_width_8); 680 mmcbr_update_ios(sc->dev); 681 682 cmd.opcode = MMC_BUSTEST_W; 683 cmd.arg = 0; 684 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 685 cmd.data = &data; 686 687 data.data = p8; 688 data.len = 8; 689 data.flags = MMC_DATA_WRITE; 690 mmc_wait_for_cmd(sc, &cmd, 0); 691 692 cmd.opcode = MMC_BUSTEST_R; 693 cmd.arg = 0; 694 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 695 cmd.data = &data; 696 697 data.data = buf; 698 data.len = 8; 699 data.flags = MMC_DATA_READ; 700 err = mmc_wait_for_cmd(sc, &cmd, 0); 701 702 mmcbr_set_bus_width(sc->dev, bus_width_1); 703 mmcbr_update_ios(sc->dev); 704 705 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 706 return (bus_width_8); 707 } 708 709 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 710 mmcbr_set_bus_width(sc->dev, bus_width_4); 711 mmcbr_update_ios(sc->dev); 712 713 cmd.opcode = MMC_BUSTEST_W; 714 cmd.arg = 0; 715 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 716 cmd.data = &data; 717 718 data.data = p4; 719 data.len = 4; 720 data.flags = MMC_DATA_WRITE; 721 mmc_wait_for_cmd(sc, &cmd, 0); 722 723 cmd.opcode = MMC_BUSTEST_R; 724 cmd.arg = 0; 725 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 726 cmd.data = &data; 727 728 data.data = buf; 729 data.len = 4; 730 data.flags = MMC_DATA_READ; 731 err = mmc_wait_for_cmd(sc, &cmd, 0); 732 733 mmcbr_set_bus_width(sc->dev, bus_width_1); 734 mmcbr_update_ios(sc->dev); 735 736 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 737 return (bus_width_4); 738 } 739 return (bus_width_1); 740} 741 742static uint32_t 743mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) 744{ 745 const int i = (bit_len / 32) - (start / 32) - 1; 746 const int shift = start & 31; 747 uint32_t retval = bits[i] >> shift; 748 if (size + shift > 32) 749 retval |= bits[i - 1] << (32 - shift); 750 return (retval & ((1 << size) - 1)); 751} 752 753static void 754mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 755{ 756 int i; 757 758 /* There's no version info, so we take it on faith */ 759 memset(cid, 0, sizeof(*cid)); 760 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 761 cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); 762 for (i = 0; i < 5; i++) 763 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 764 cid->pnm[5] = 0; 765 cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); 766 cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); 767 cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2000; 768 cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); 769} 770 771static void 772mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 773{ 774 int i; 775 776 /* There's no version info, so we take it on faith */ 777 memset(cid, 0, sizeof(*cid)); 778 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 779 cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); 780 for (i = 0; i < 6; i++) 781 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 782 cid->pnm[6] = 0; 783 cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); 784 cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); 785 cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); 786 cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; 787} 788 789static const int exp[8] = { 790 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 791}; 792static const int mant[16] = { 793 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 794}; 795static const int cur_min[8] = { 796 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 797}; 798static const int cur_max[8] = { 799 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 800}; 801 802static void 803mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 804{ 805 int v; 806 int m; 807 int e; 808 809 memset(csd, 0, sizeof(*csd)); 810 csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); 811 if (v == 0) { 812 m = mmc_get_bits(raw_csd, 128, 115, 4); 813 e = mmc_get_bits(raw_csd, 128, 112, 3); 814 csd->tacc = exp[e] * mant[m] + 9 / 10; 815 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 816 m = mmc_get_bits(raw_csd, 128, 99, 4); 817 e = mmc_get_bits(raw_csd, 128, 96, 3); 818 csd->tran_speed = exp[e] * 10000 * mant[m]; 819 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 820 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 821 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 822 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 823 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 824 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 825 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 826 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 827 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 828 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 829 m = mmc_get_bits(raw_csd, 128, 62, 12); 830 e = mmc_get_bits(raw_csd, 128, 47, 3); 831 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 832 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 833 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 834 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 835 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 836 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 837 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 838 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 839 } else if (v == 1) { 840 m = mmc_get_bits(raw_csd, 128, 115, 4); 841 e = mmc_get_bits(raw_csd, 128, 112, 3); 842 csd->tacc = exp[e] * mant[m] + 9 / 10; 843 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 844 m = mmc_get_bits(raw_csd, 128, 99, 4); 845 e = mmc_get_bits(raw_csd, 128, 96, 3); 846 csd->tran_speed = exp[e] * 10000 * mant[m]; 847 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 848 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 849 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 850 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 851 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 852 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 853 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 854 512 * 1024; 855 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 856 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 857 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 858 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 859 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 860 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 861 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 862 } else 863 panic("unknown SD CSD version"); 864} 865 866static void 867mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 868{ 869 int m; 870 int e; 871 872 memset(csd, 0, sizeof(*csd)); 873 csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); 874 csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); 875 m = mmc_get_bits(raw_csd, 128, 115, 4); 876 e = mmc_get_bits(raw_csd, 128, 112, 3); 877 csd->tacc = exp[e] * mant[m] + 9 / 10; 878 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 879 m = mmc_get_bits(raw_csd, 128, 99, 4); 880 e = mmc_get_bits(raw_csd, 128, 96, 3); 881 csd->tran_speed = exp[e] * 10000 * mant[m]; 882 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 883 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 884 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 885 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 886 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 887 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 888 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 889 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 890 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 891 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 892 m = mmc_get_bits(raw_csd, 128, 62, 12); 893 e = mmc_get_bits(raw_csd, 128, 47, 3); 894 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 895 csd->erase_blk_en = 0; 896 csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * 897 (mmc_get_bits(raw_csd, 128, 37, 5) + 1); 898 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); 899 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 900 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 901 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 902 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 903} 904 905static void 906mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 907{ 908 unsigned int scr_struct; 909 910 memset(scr, 0, sizeof(*scr)); 911 912 scr_struct = mmc_get_bits(raw_scr, 64, 60, 4); 913 if (scr_struct != 0) { 914 printf("Unrecognised SCR structure version %d\n", 915 scr_struct); 916 return; 917 } 918 scr->sda_vsn = mmc_get_bits(raw_scr, 64, 56, 4); 919 scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); 920} 921 922static void 923mmc_app_decode_sd_status(uint32_t *raw_sd_status, 924 struct mmc_sd_status *sd_status) 925{ 926 927 memset(sd_status, 0, sizeof(*sd_status)); 928 929 sd_status->bus_width = mmc_get_bits(raw_sd_status, 512, 510, 2); 930 sd_status->secured_mode = mmc_get_bits(raw_sd_status, 512, 509, 1); 931 sd_status->card_type = mmc_get_bits(raw_sd_status, 512, 480, 16); 932 sd_status->prot_area = mmc_get_bits(raw_sd_status, 512, 448, 12); 933 sd_status->speed_class = mmc_get_bits(raw_sd_status, 512, 440, 8); 934 sd_status->perf_move = mmc_get_bits(raw_sd_status, 512, 432, 8); 935 sd_status->au_size = mmc_get_bits(raw_sd_status, 512, 428, 4); 936 sd_status->erase_size = mmc_get_bits(raw_sd_status, 512, 408, 16); 937 sd_status->erase_timeout = mmc_get_bits(raw_sd_status, 512, 402, 6); 938 sd_status->erase_offset = mmc_get_bits(raw_sd_status, 512, 400, 2); 939} 940 941static int 942mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 943{ 944 struct mmc_command cmd; 945 int err; 946 947 cmd.opcode = MMC_ALL_SEND_CID; 948 cmd.arg = 0; 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_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 958{ 959 struct mmc_command cmd; 960 int err; 961 962 cmd.opcode = MMC_SEND_CSD; 963 cmd.arg = rca << 16; 964 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 965 cmd.data = NULL; 966 err = mmc_wait_for_cmd(sc, &cmd, 0); 967 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 968 return (err); 969} 970 971static int 972mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 973{ 974 int err; 975 struct mmc_command cmd; 976 struct mmc_data data; 977 978 memset(&cmd, 0, sizeof(struct mmc_command)); 979 memset(&data, 0, sizeof(struct mmc_data)); 980 981 memset(rawscr, 0, 8); 982 cmd.opcode = ACMD_SEND_SCR; 983 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 984 cmd.arg = 0; 985 cmd.data = &data; 986 987 data.data = rawscr; 988 data.len = 8; 989 data.flags = MMC_DATA_READ; 990 991 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 992 rawscr[0] = be32toh(rawscr[0]); 993 rawscr[1] = be32toh(rawscr[1]); 994 return (err); 995} 996 997static int 998mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 999{ 1000 int err; 1001 struct mmc_command cmd; 1002 struct mmc_data data; 1003 1004 memset(&cmd, 0, sizeof(struct mmc_command)); 1005 memset(&data, 0, sizeof(struct mmc_data)); 1006 1007 memset(rawextcsd, 0, 512); 1008 cmd.opcode = MMC_SEND_EXT_CSD; 1009 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1010 cmd.arg = 0; 1011 cmd.data = &data; 1012 1013 data.data = rawextcsd; 1014 data.len = 512; 1015 data.flags = MMC_DATA_READ; 1016 1017 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 1018 return (err); 1019} 1020 1021static int 1022mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, uint32_t *rawsdstatus) 1023{ 1024 int err, i; 1025 struct mmc_command cmd; 1026 struct mmc_data data; 1027 1028 memset(&cmd, 0, sizeof(struct mmc_command)); 1029 memset(&data, 0, sizeof(struct mmc_data)); 1030 1031 memset(rawsdstatus, 0, 64); 1032 cmd.opcode = ACMD_SD_STATUS; 1033 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1034 cmd.arg = 0; 1035 cmd.data = &data; 1036 1037 data.data = rawsdstatus; 1038 data.len = 64; 1039 data.flags = MMC_DATA_READ; 1040 1041 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1042 for (i = 0; i < 16; i++) 1043 rawsdstatus[i] = be32toh(rawsdstatus[i]); 1044 return (err); 1045} 1046 1047static int 1048mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 1049{ 1050 struct mmc_command cmd; 1051 int err; 1052 1053 cmd.opcode = MMC_SET_RELATIVE_ADDR; 1054 cmd.arg = resp << 16; 1055 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1056 cmd.data = NULL; 1057 err = mmc_wait_for_cmd(sc, &cmd, 0); 1058 return (err); 1059} 1060 1061static int 1062mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1063{ 1064 struct mmc_command cmd; 1065 int err; 1066 1067 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1068 cmd.arg = 0; 1069 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1070 cmd.data = NULL; 1071 err = mmc_wait_for_cmd(sc, &cmd, 0); 1072 *resp = cmd.resp[0]; 1073 return (err); 1074} 1075 1076static void 1077mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard) 1078{ 1079 device_printf(dev, "Card at relative address %d%s:\n", 1080 ivar->rca, newcard ? " added" : ""); 1081 device_printf(dev, " card: %s%s (0x%x/0x%x/\"%s\" rev %d.%d " 1082 "m/d %02d.%04d s/n %08x)\n", 1083 ivar->mode == mode_sd ? "SD" : "MMC", 1084 ivar->high_cap ? " High Capacity" : "", 1085 ivar->cid.mid, ivar->cid.oid, 1086 ivar->cid.pnm, ivar->cid.prv >> 4, ivar->cid.prv & 0x0f, 1087 ivar->cid.mdt_month, ivar->cid.mdt_year, ivar->cid.psn); 1088 device_printf(dev, " bus: %ubit, %uMHz%s\n", 1089 (ivar->bus_width == bus_width_1 ? 1 : 1090 (ivar->bus_width == bus_width_4 ? 4 : 8)), 1091 (ivar->timing == bus_timing_hs ? 1092 ivar->hs_tran_speed : ivar->tran_speed) / 1000000, 1093 ivar->timing == bus_timing_hs ? ", high speed timing" : ""); 1094 device_printf(dev, " memory: %u blocks, erase sector %u blocks%s\n", 1095 ivar->sec_count, ivar->erase_sector, 1096 ivar->read_only ? ", read-only" : ""); 1097} 1098 1099static void 1100mmc_discover_cards(struct mmc_softc *sc) 1101{ 1102 struct mmc_ivars *ivar = NULL; 1103 device_t *devlist; 1104 int err, i, devcount, newcard; 1105 uint32_t raw_cid[4]; 1106 uint32_t resp, sec_count; 1107 device_t child; 1108 uint16_t rca = 2; 1109 u_char switch_res[64]; 1110 1111 if (bootverbose || mmc_debug) 1112 device_printf(sc->dev, "Probing cards\n"); 1113 while (1) { 1114 err = mmc_all_send_cid(sc, raw_cid); 1115 if (err == MMC_ERR_TIMEOUT) 1116 break; 1117 if (err != MMC_ERR_NONE) { 1118 device_printf(sc->dev, "Error reading CID %d\n", err); 1119 break; 1120 } 1121 newcard = 1; 1122 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1123 return; 1124 for (i = 0; i < devcount; i++) { 1125 ivar = device_get_ivars(devlist[i]); 1126 if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) { 1127 newcard = 0; 1128 break; 1129 } 1130 } 1131 free(devlist, M_TEMP); 1132 if (bootverbose || mmc_debug) { 1133 device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n", 1134 newcard ? "New c" : "C", 1135 raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]); 1136 } 1137 if (newcard) { 1138 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1139 M_WAITOK | M_ZERO); 1140 if (!ivar) 1141 return; 1142 memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid)); 1143 } 1144 if (mmcbr_get_ro(sc->dev)) 1145 ivar->read_only = 1; 1146 ivar->bus_width = bus_width_1; 1147 ivar->mode = mmcbr_get_mode(sc->dev); 1148 if (ivar->mode == mode_sd) { 1149 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1150 mmc_send_relative_addr(sc, &resp); 1151 ivar->rca = resp >> 16; 1152 /* Get card CSD. */ 1153 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1154 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1155 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1156 if (ivar->csd.csd_structure > 0) 1157 ivar->high_cap = 1; 1158 ivar->tran_speed = ivar->csd.tran_speed; 1159 ivar->erase_sector = ivar->csd.erase_sector * 1160 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1161 /* Get card SCR. Card must be selected to fetch it. */ 1162 mmc_select_card(sc, ivar->rca); 1163 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1164 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1165 /* Get card switch capabilities. */ 1166 ivar->timing = bus_timing_normal; 1167 if ((ivar->scr.sda_vsn >= 1) && 1168 (ivar->csd.ccc & (1<<10))) { 1169 mmc_sd_switch(sc, 0, 0, 0xF, switch_res); 1170 if (switch_res[13] & 2) { 1171 ivar->timing = bus_timing_hs; 1172 ivar->hs_tran_speed = 50000000; 1173 } 1174 } 1175 mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); 1176 mmc_app_decode_sd_status(ivar->raw_sd_status, 1177 &ivar->sd_status); 1178 if (ivar->sd_status.au_size != 0) { 1179 ivar->erase_sector = 1180 16 << ivar->sd_status.au_size; 1181 } 1182 mmc_select_card(sc, 0); 1183 /* Find max supported bus width. */ 1184 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1185 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1186 ivar->bus_width = bus_width_4; 1187 if (bootverbose || mmc_debug) 1188 mmc_log_card(sc->dev, ivar, newcard); 1189 if (newcard) { 1190 /* Add device. */ 1191 child = device_add_child(sc->dev, NULL, -1); 1192 device_set_ivars(child, ivar); 1193 } 1194 return; 1195 } 1196 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1197 ivar->rca = rca++; 1198 mmc_set_relative_addr(sc, ivar->rca); 1199 /* Get card CSD. */ 1200 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1201 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1202 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1203 ivar->tran_speed = ivar->csd.tran_speed; 1204 ivar->erase_sector = ivar->csd.erase_sector * 1205 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1206 /* Only MMC >= 4.x cards support EXT_CSD. */ 1207 if (ivar->csd.spec_vers >= 4) { 1208 /* Card must be selected to fetch EXT_CSD. */ 1209 mmc_select_card(sc, ivar->rca); 1210 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1211 /* Handle extended capacity from EXT_CSD */ 1212 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1213 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1214 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1215 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1216 if (sec_count != 0) { 1217 ivar->sec_count = sec_count; 1218 ivar->high_cap = 1; 1219 } 1220 /* Get card speed in high speed mode. */ 1221 ivar->timing = bus_timing_hs; 1222 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1223 & EXT_CSD_CARD_TYPE_52) 1224 ivar->hs_tran_speed = 52000000; 1225 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1226 & EXT_CSD_CARD_TYPE_26) 1227 ivar->hs_tran_speed = 26000000; 1228 else 1229 ivar->hs_tran_speed = ivar->tran_speed; 1230 /* Find max supported bus width. */ 1231 ivar->bus_width = mmc_test_bus_width(sc); 1232 mmc_select_card(sc, 0); 1233 /* Handle HC erase sector size. */ 1234 if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) { 1235 ivar->erase_sector = 1024 * 1236 ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE]; 1237 mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 1238 EXT_CSD_ERASE_GRP_DEF, 1); 1239 } 1240 } else { 1241 ivar->bus_width = bus_width_1; 1242 ivar->timing = bus_timing_normal; 1243 } 1244 if (bootverbose || mmc_debug) 1245 mmc_log_card(sc->dev, ivar, newcard); 1246 if (newcard) { 1247 /* Add device. */ 1248 child = device_add_child(sc->dev, NULL, -1); 1249 device_set_ivars(child, ivar); 1250 } 1251 } 1252} 1253 1254static void 1255mmc_rescan_cards(struct mmc_softc *sc) 1256{ 1257 struct mmc_ivars *ivar = NULL; 1258 device_t *devlist; 1259 int err, i, devcount; 1260 1261 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1262 return; 1263 for (i = 0; i < devcount; i++) { 1264 ivar = device_get_ivars(devlist[i]); 1265 if (mmc_select_card(sc, ivar->rca)) { 1266 if (bootverbose || mmc_debug) 1267 device_printf(sc->dev, "Card at relative address %d lost.\n", 1268 ivar->rca); 1269 device_delete_child(sc->dev, devlist[i]); 1270 free(ivar, M_DEVBUF); 1271 } 1272 } 1273 free(devlist, M_TEMP); 1274 mmc_select_card(sc, 0); 1275} 1276 1277static int 1278mmc_delete_cards(struct mmc_softc *sc) 1279{ 1280 struct mmc_ivars *ivar; 1281 device_t *devlist; 1282 int err, i, devcount; 1283 1284 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1285 return (err); 1286 for (i = 0; i < devcount; i++) { 1287 ivar = device_get_ivars(devlist[i]); 1288 if (bootverbose || mmc_debug) 1289 device_printf(sc->dev, "Card at relative address %d deleted.\n", 1290 ivar->rca); 1291 device_delete_child(sc->dev, devlist[i]); 1292 free(ivar, M_DEVBUF); 1293 } 1294 free(devlist, M_TEMP); 1295 return (0); 1296} 1297 1298static void 1299mmc_go_discovery(struct mmc_softc *sc) 1300{ 1301 uint32_t ocr; 1302 device_t dev; 1303 int err; 1304 1305 dev = sc->dev; 1306 if (mmcbr_get_power_mode(dev) != power_on) { 1307 /* 1308 * First, try SD modes 1309 */ 1310 mmcbr_set_mode(dev, mode_sd); 1311 mmc_power_up(sc); 1312 mmcbr_set_bus_mode(dev, pushpull); 1313 if (bootverbose || mmc_debug) 1314 device_printf(sc->dev, "Probing bus\n"); 1315 mmc_idle_cards(sc); 1316 err = mmc_send_if_cond(sc, 1); 1317 if ((bootverbose || mmc_debug) && err == 0) 1318 device_printf(sc->dev, "SD 2.0 interface conditions: OK\n"); 1319 if (mmc_send_app_op_cond(sc, err ? 0 : MMC_OCR_CCS, &ocr) != 1320 MMC_ERR_NONE) { 1321 if (bootverbose || mmc_debug) 1322 device_printf(sc->dev, "SD probe: failed\n"); 1323 /* 1324 * Failed, try MMC 1325 */ 1326 mmcbr_set_mode(dev, mode_mmc); 1327 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 1328 if (bootverbose || mmc_debug) 1329 device_printf(sc->dev, "MMC probe: failed\n"); 1330 ocr = 0; /* Failed both, powerdown. */ 1331 } else if (bootverbose || mmc_debug) 1332 device_printf(sc->dev, 1333 "MMC probe: OK (OCR: 0x%08x)\n", ocr); 1334 } else if (bootverbose || mmc_debug) 1335 device_printf(sc->dev, "SD probe: OK (OCR: 0x%08x)\n", ocr); 1336 1337 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1338 if (mmcbr_get_ocr(dev) != 0) 1339 mmc_idle_cards(sc); 1340 } else { 1341 mmcbr_set_bus_mode(dev, opendrain); 1342 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1343 mmcbr_update_ios(dev); 1344 /* XXX recompute vdd based on new cards? */ 1345 } 1346 /* 1347 * Make sure that we have a mutually agreeable voltage to at least 1348 * one card on the bus. 1349 */ 1350 if (bootverbose || mmc_debug) 1351 device_printf(sc->dev, "Current OCR: 0x%08x\n", mmcbr_get_ocr(dev)); 1352 if (mmcbr_get_ocr(dev) == 0) { 1353 mmc_delete_cards(sc); 1354 mmc_power_down(sc); 1355 return; 1356 } 1357 /* 1358 * Reselect the cards after we've idled them above. 1359 */ 1360 if (mmcbr_get_mode(dev) == mode_sd) { 1361 err = mmc_send_if_cond(sc, 1); 1362 mmc_send_app_op_cond(sc, 1363 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1364 } else 1365 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1366 mmc_discover_cards(sc); 1367 mmc_rescan_cards(sc); 1368 1369 mmcbr_set_bus_mode(dev, pushpull); 1370 mmcbr_update_ios(dev); 1371 mmc_calculate_clock(sc); 1372 bus_generic_attach(dev); 1373/* mmc_update_children_sysctl(dev);*/ 1374} 1375 1376static int 1377mmc_calculate_clock(struct mmc_softc *sc) 1378{ 1379 int max_dtr, max_hs_dtr, max_timing; 1380 int nkid, i, f_min, f_max; 1381 device_t *kids; 1382 struct mmc_ivars *ivar; 1383 1384 f_min = mmcbr_get_f_min(sc->dev); 1385 f_max = mmcbr_get_f_max(sc->dev); 1386 max_dtr = max_hs_dtr = f_max; 1387 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1388 max_timing = bus_timing_hs; 1389 else 1390 max_timing = bus_timing_normal; 1391 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1392 panic("can't get children"); 1393 for (i = 0; i < nkid; i++) { 1394 ivar = device_get_ivars(kids[i]); 1395 if (ivar->timing < max_timing) 1396 max_timing = ivar->timing; 1397 if (ivar->tran_speed < max_dtr) 1398 max_dtr = ivar->tran_speed; 1399 if (ivar->hs_tran_speed < max_hs_dtr) 1400 max_hs_dtr = ivar->hs_tran_speed; 1401 } 1402 for (i = 0; i < nkid; i++) { 1403 ivar = device_get_ivars(kids[i]); 1404 if (ivar->timing == bus_timing_normal) 1405 continue; 1406 mmc_select_card(sc, ivar->rca); 1407 mmc_set_timing(sc, max_timing); 1408 } 1409 mmc_select_card(sc, 0); 1410 free(kids, M_TEMP); 1411 if (max_timing == bus_timing_hs) 1412 max_dtr = max_hs_dtr; 1413 if (bootverbose || mmc_debug) { 1414 device_printf(sc->dev, 1415 "setting transfer rate to %d.%03dMHz%s\n", 1416 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1417 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1418 } 1419 mmcbr_set_timing(sc->dev, max_timing); 1420 mmcbr_set_clock(sc->dev, max_dtr); 1421 mmcbr_update_ios(sc->dev); 1422 return max_dtr; 1423} 1424 1425static void 1426mmc_scan(struct mmc_softc *sc) 1427{ 1428 device_t dev = sc->dev; 1429 1430 mmc_acquire_bus(dev, dev); 1431 mmc_go_discovery(sc); 1432 mmc_release_bus(dev, dev); 1433} 1434 1435static int 1436mmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 1437{ 1438 struct mmc_ivars *ivar = device_get_ivars(child); 1439 1440 switch (which) { 1441 default: 1442 return (EINVAL); 1443 case MMC_IVAR_DSR_IMP: 1444 *(int *)result = ivar->csd.dsr_imp; 1445 break; 1446 case MMC_IVAR_MEDIA_SIZE: 1447 *(off_t *)result = ivar->sec_count; 1448 break; 1449 case MMC_IVAR_RCA: 1450 *(int *)result = ivar->rca; 1451 break; 1452 case MMC_IVAR_SECTOR_SIZE: 1453 *(int *)result = MMC_SECTOR_SIZE; 1454 break; 1455 case MMC_IVAR_TRAN_SPEED: 1456 *(int *)result = mmcbr_get_clock(bus); 1457 break; 1458 case MMC_IVAR_READ_ONLY: 1459 *(int *)result = ivar->read_only; 1460 break; 1461 case MMC_IVAR_HIGH_CAP: 1462 *(int *)result = ivar->high_cap; 1463 break; 1464 case MMC_IVAR_CARD_TYPE: 1465 *(int *)result = ivar->mode; 1466 break; 1467 case MMC_IVAR_BUS_WIDTH: 1468 *(int *)result = ivar->bus_width; 1469 break; 1470 case MMC_IVAR_ERASE_SECTOR: 1471 *(int *)result = ivar->erase_sector; 1472 break; 1473 case MMC_IVAR_MAX_DATA: 1474 *(int *)result = mmcbr_get_max_data(bus); 1475 break; 1476 } 1477 return (0); 1478} 1479 1480static int 1481mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1482{ 1483 /* 1484 * None are writable ATM 1485 */ 1486 return (EINVAL); 1487} 1488 1489 1490static void 1491mmc_delayed_attach(void *xsc) 1492{ 1493 struct mmc_softc *sc = xsc; 1494 1495 mmc_scan(sc); 1496 config_intrhook_disestablish(&sc->config_intrhook); 1497} 1498 1499static device_method_t mmc_methods[] = { 1500 /* device_if */ 1501 DEVMETHOD(device_probe, mmc_probe), 1502 DEVMETHOD(device_attach, mmc_attach), 1503 DEVMETHOD(device_detach, mmc_detach), 1504 DEVMETHOD(device_suspend, mmc_suspend), 1505 DEVMETHOD(device_resume, mmc_resume), 1506 1507 /* Bus interface */ 1508 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1509 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1510 1511 /* MMC Bus interface */ 1512 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1513 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1514 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1515 1516 {0, 0}, 1517}; 1518 1519static driver_t mmc_driver = { 1520 "mmc", 1521 mmc_methods, 1522 sizeof(struct mmc_softc), 1523}; 1524static devclass_t mmc_devclass; 1525 1526 1527DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 1528DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, 0, 0); 1529