mmc.c revision 234524
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 234524 2012-04-21 01:51:16Z marius $"); 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 char card_id_string[64];/* Formatted CID info (serial, MFG, etc) */ 105}; 106 107#define CMD_RETRIES 3 108 109static SYSCTL_NODE(_hw, OID_AUTO, mmc, CTLFLAG_RD, NULL, "mmc driver"); 110 111static int mmc_debug; 112SYSCTL_INT(_hw_mmc, OID_AUTO, debug, CTLFLAG_RW, &mmc_debug, 0, "Debug level"); 113 114/* bus entry points */ 115static int mmc_probe(device_t dev); 116static int mmc_attach(device_t dev); 117static int mmc_detach(device_t dev); 118static int mmc_suspend(device_t dev); 119static int mmc_resume(device_t dev); 120 121#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 122#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 123#define MMC_LOCK_INIT(_sc) \ 124 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 125 "mmc", MTX_DEF) 126#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 127#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 128#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 129 130static int mmc_calculate_clock(struct mmc_softc *sc); 131static void mmc_delayed_attach(void *); 132static void mmc_power_down(struct mmc_softc *sc); 133static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 134 int retries); 135static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 136 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 137static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 138static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 139static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 140static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 141static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 142static void mmc_scan(struct mmc_softc *sc); 143static int mmc_delete_cards(struct mmc_softc *sc); 144static void mmc_format_card_id_string(struct mmc_ivars *ivar); 145 146static void 147mmc_ms_delay(int ms) 148{ 149 DELAY(1000 * ms); /* XXX BAD */ 150} 151 152static int 153mmc_probe(device_t dev) 154{ 155 156 device_set_desc(dev, "MMC/SD bus"); 157 return (0); 158} 159 160static int 161mmc_attach(device_t dev) 162{ 163 struct mmc_softc *sc; 164 165 sc = device_get_softc(dev); 166 sc->dev = dev; 167 MMC_LOCK_INIT(sc); 168 169 /* We'll probe and attach our children later, but before / mount */ 170 sc->config_intrhook.ich_func = mmc_delayed_attach; 171 sc->config_intrhook.ich_arg = sc; 172 if (config_intrhook_establish(&sc->config_intrhook) != 0) 173 device_printf(dev, "config_intrhook_establish failed\n"); 174 return (0); 175} 176 177static int 178mmc_detach(device_t dev) 179{ 180 struct mmc_softc *sc = device_get_softc(dev); 181 int err; 182 183 if ((err = mmc_delete_cards(sc)) != 0) 184 return (err); 185 mmc_power_down(sc); 186 MMC_LOCK_DESTROY(sc); 187 188 return (0); 189} 190 191static int 192mmc_suspend(device_t dev) 193{ 194 struct mmc_softc *sc = device_get_softc(dev); 195 int err; 196 197 err = bus_generic_suspend(dev); 198 if (err) 199 return (err); 200 mmc_power_down(sc); 201 return (0); 202} 203 204static int 205mmc_resume(device_t dev) 206{ 207 struct mmc_softc *sc = device_get_softc(dev); 208 209 mmc_scan(sc); 210 return (bus_generic_resume(dev)); 211} 212 213static int 214mmc_acquire_bus(device_t busdev, device_t dev) 215{ 216 struct mmc_softc *sc; 217 struct mmc_ivars *ivar; 218 int err; 219 int rca; 220 221 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 222 if (err) 223 return (err); 224 sc = device_get_softc(busdev); 225 MMC_LOCK(sc); 226 if (sc->owner) 227 panic("mmc: host bridge didn't seralize us."); 228 sc->owner = dev; 229 MMC_UNLOCK(sc); 230 231 if (busdev != dev) { 232 /* 233 * Keep track of the last rca that we've selected. If 234 * we're asked to do it again, don't. We never 235 * unselect unless the bus code itself wants the mmc 236 * bus, and constantly reselecting causes problems. 237 */ 238 rca = mmc_get_rca(dev); 239 if (sc->last_rca != rca) { 240 mmc_select_card(sc, rca); 241 sc->last_rca = rca; 242 /* Prepare bus width for the new card. */ 243 ivar = device_get_ivars(dev); 244 if (bootverbose || mmc_debug) { 245 device_printf(busdev, 246 "setting bus width to %d bits\n", 247 (ivar->bus_width == bus_width_4) ? 4 : 248 (ivar->bus_width == bus_width_8) ? 8 : 1); 249 } 250 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 251 mmcbr_set_bus_width(busdev, ivar->bus_width); 252 mmcbr_update_ios(busdev); 253 } 254 } else { 255 /* 256 * If there's a card selected, stand down. 257 */ 258 if (sc->last_rca != 0) { 259 mmc_select_card(sc, 0); 260 sc->last_rca = 0; 261 } 262 } 263 264 return (0); 265} 266 267static int 268mmc_release_bus(device_t busdev, device_t dev) 269{ 270 struct mmc_softc *sc; 271 int err; 272 273 sc = device_get_softc(busdev); 274 275 MMC_LOCK(sc); 276 if (!sc->owner) 277 panic("mmc: releasing unowned bus."); 278 if (sc->owner != dev) 279 panic("mmc: you don't own the bus. game over."); 280 MMC_UNLOCK(sc); 281 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 282 if (err) 283 return (err); 284 MMC_LOCK(sc); 285 sc->owner = NULL; 286 MMC_UNLOCK(sc); 287 return (0); 288} 289 290static uint32_t 291mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 292{ 293 294 return (ocr & MMC_OCR_VOLTAGE); 295} 296 297static int 298mmc_highest_voltage(uint32_t ocr) 299{ 300 int i; 301 302 for (i = 30; i >= 0; i--) 303 if (ocr & (1 << i)) 304 return (i); 305 return (-1); 306} 307 308static void 309mmc_wakeup(struct mmc_request *req) 310{ 311 struct mmc_softc *sc; 312 313 sc = (struct mmc_softc *)req->done_data; 314 MMC_LOCK(sc); 315 req->flags |= MMC_REQ_DONE; 316 MMC_UNLOCK(sc); 317 wakeup(req); 318} 319 320static int 321mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 322{ 323 324 req->done = mmc_wakeup; 325 req->done_data = sc; 326 if (mmc_debug > 1) { 327 device_printf(sc->dev, "REQUEST: CMD%d arg %#x flags %#x", 328 req->cmd->opcode, req->cmd->arg, req->cmd->flags); 329 if (req->cmd->data) { 330 printf(" data %d\n", (int)req->cmd->data->len); 331 } else 332 printf("\n"); 333 } 334 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 335 MMC_LOCK(sc); 336 while ((req->flags & MMC_REQ_DONE) == 0) 337 msleep(req, &sc->sc_mtx, 0, "mmcreq", 0); 338 MMC_UNLOCK(sc); 339 if (mmc_debug > 2 || (mmc_debug > 1 && req->cmd->error)) 340 device_printf(sc->dev, "RESULT: %d\n", req->cmd->error); 341 return (0); 342} 343 344static int 345mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 346{ 347 struct mmc_softc *sc = device_get_softc(brdev); 348 349 return (mmc_wait_for_req(sc, req)); 350} 351 352static int 353mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 354{ 355 struct mmc_request mreq; 356 357 memset(&mreq, 0, sizeof(mreq)); 358 memset(cmd->resp, 0, sizeof(cmd->resp)); 359 cmd->retries = retries; 360 mreq.cmd = cmd; 361 mmc_wait_for_req(sc, &mreq); 362 return (cmd->error); 363} 364 365static int 366mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 367 struct mmc_command *cmd, int retries) 368{ 369 struct mmc_command appcmd; 370 int err = MMC_ERR_NONE, i; 371 372 for (i = 0; i <= retries; i++) { 373 appcmd.opcode = MMC_APP_CMD; 374 appcmd.arg = rca << 16; 375 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 376 appcmd.data = NULL; 377 mmc_wait_for_cmd(sc, &appcmd, 0); 378 err = appcmd.error; 379 if (err != MMC_ERR_NONE) 380 continue; 381 if (!(appcmd.resp[0] & R1_APP_CMD)) 382 return MMC_ERR_FAILED; 383 mmc_wait_for_cmd(sc, cmd, 0); 384 err = cmd->error; 385 if (err == MMC_ERR_NONE) 386 break; 387 } 388 return (err); 389} 390 391static int 392mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 393 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 394{ 395 struct mmc_command cmd; 396 int err; 397 398 memset(&cmd, 0, sizeof(cmd)); 399 cmd.opcode = opcode; 400 cmd.arg = arg; 401 cmd.flags = flags; 402 cmd.data = NULL; 403 err = mmc_wait_for_cmd(sc, &cmd, retries); 404 if (err) 405 return (err); 406 if (cmd.error) 407 return (cmd.error); 408 if (resp) { 409 if (flags & MMC_RSP_136) 410 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 411 else 412 *resp = cmd.resp[0]; 413 } 414 return (0); 415} 416 417static void 418mmc_idle_cards(struct mmc_softc *sc) 419{ 420 device_t dev; 421 struct mmc_command cmd; 422 423 dev = sc->dev; 424 mmcbr_set_chip_select(dev, cs_high); 425 mmcbr_update_ios(dev); 426 mmc_ms_delay(1); 427 428 memset(&cmd, 0, sizeof(cmd)); 429 cmd.opcode = MMC_GO_IDLE_STATE; 430 cmd.arg = 0; 431 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 432 cmd.data = NULL; 433 mmc_wait_for_cmd(sc, &cmd, 0); 434 mmc_ms_delay(1); 435 436 mmcbr_set_chip_select(dev, cs_dontcare); 437 mmcbr_update_ios(dev); 438 mmc_ms_delay(1); 439} 440 441static int 442mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 443{ 444 struct mmc_command cmd; 445 int err = MMC_ERR_NONE, i; 446 447 memset(&cmd, 0, sizeof(cmd)); 448 cmd.opcode = ACMD_SD_SEND_OP_COND; 449 cmd.arg = ocr; 450 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 451 cmd.data = NULL; 452 453 for (i = 0; i < 1000; i++) { 454 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 455 if (err != MMC_ERR_NONE) 456 break; 457 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 458 (ocr & MMC_OCR_VOLTAGE) == 0) 459 break; 460 err = MMC_ERR_TIMEOUT; 461 mmc_ms_delay(10); 462 } 463 if (rocr && err == MMC_ERR_NONE) 464 *rocr = cmd.resp[0]; 465 return (err); 466} 467 468static int 469mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 470{ 471 struct mmc_command cmd; 472 int err = MMC_ERR_NONE, i; 473 474 memset(&cmd, 0, sizeof(cmd)); 475 cmd.opcode = MMC_SEND_OP_COND; 476 cmd.arg = ocr; 477 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 478 cmd.data = NULL; 479 480 for (i = 0; i < 1000; i++) { 481 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 482 if (err != MMC_ERR_NONE) 483 break; 484 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 485 (ocr & MMC_OCR_VOLTAGE) == 0) 486 break; 487 err = MMC_ERR_TIMEOUT; 488 mmc_ms_delay(10); 489 } 490 if (rocr && err == MMC_ERR_NONE) 491 *rocr = cmd.resp[0]; 492 return (err); 493} 494 495static int 496mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 497{ 498 struct mmc_command cmd; 499 int err; 500 501 memset(&cmd, 0, sizeof(cmd)); 502 cmd.opcode = SD_SEND_IF_COND; 503 cmd.arg = (vhs << 8) + 0xAA; 504 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 505 cmd.data = NULL; 506 507 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 508 return (err); 509} 510 511static void 512mmc_power_up(struct mmc_softc *sc) 513{ 514 device_t dev; 515 516 dev = sc->dev; 517 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 518 mmcbr_set_bus_mode(dev, opendrain); 519 mmcbr_set_chip_select(dev, cs_dontcare); 520 mmcbr_set_bus_width(dev, bus_width_1); 521 mmcbr_set_power_mode(dev, power_up); 522 mmcbr_set_clock(dev, 0); 523 mmcbr_update_ios(dev); 524 mmc_ms_delay(1); 525 526 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 527 mmcbr_set_timing(dev, bus_timing_normal); 528 mmcbr_set_power_mode(dev, power_on); 529 mmcbr_update_ios(dev); 530 mmc_ms_delay(2); 531} 532 533static void 534mmc_power_down(struct mmc_softc *sc) 535{ 536 device_t dev = sc->dev; 537 538 mmcbr_set_bus_mode(dev, opendrain); 539 mmcbr_set_chip_select(dev, cs_dontcare); 540 mmcbr_set_bus_width(dev, bus_width_1); 541 mmcbr_set_power_mode(dev, power_off); 542 mmcbr_set_clock(dev, 0); 543 mmcbr_set_timing(dev, bus_timing_normal); 544 mmcbr_update_ios(dev); 545} 546 547static int 548mmc_select_card(struct mmc_softc *sc, uint16_t rca) 549{ 550 int flags; 551 552 flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; 553 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16, 554 flags, NULL, CMD_RETRIES)); 555} 556 557static int 558mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 559{ 560 struct mmc_command cmd; 561 int err; 562 563 cmd.opcode = MMC_SWITCH_FUNC; 564 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 565 (index << 16) | 566 (value << 8) | 567 set; 568 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 569 cmd.data = NULL; 570 err = mmc_wait_for_cmd(sc, &cmd, 0); 571 return (err); 572} 573 574static int 575mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, 576 uint8_t *res) 577{ 578 int err; 579 struct mmc_command cmd; 580 struct mmc_data data; 581 582 memset(&cmd, 0, sizeof(struct mmc_command)); 583 memset(&data, 0, sizeof(struct mmc_data)); 584 memset(res, 0, 64); 585 586 cmd.opcode = SD_SWITCH_FUNC; 587 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 588 cmd.arg = mode << 31; /* 0 - check, 1 - set */ 589 cmd.arg |= 0x00FFFFFF; 590 cmd.arg &= ~(0xF << (grp * 4)); 591 cmd.arg |= value << (grp * 4); 592 cmd.data = &data; 593 594 data.data = res; 595 data.len = 64; 596 data.flags = MMC_DATA_READ; 597 598 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 599 return (err); 600} 601 602static int 603mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 604{ 605 struct mmc_command cmd; 606 int err; 607 uint8_t value; 608 609 if (mmcbr_get_mode(sc->dev) == mode_sd) { 610 memset(&cmd, 0, sizeof(struct mmc_command)); 611 cmd.opcode = ACMD_SET_CLR_CARD_DETECT; 612 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 613 cmd.arg = SD_CLR_CARD_DETECT; 614 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 615 if (err != 0) 616 return (err); 617 memset(&cmd, 0, sizeof(struct mmc_command)); 618 cmd.opcode = ACMD_SET_BUS_WIDTH; 619 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 620 switch (width) { 621 case bus_width_1: 622 cmd.arg = SD_BUS_WIDTH_1; 623 break; 624 case bus_width_4: 625 cmd.arg = SD_BUS_WIDTH_4; 626 break; 627 default: 628 return (MMC_ERR_INVALID); 629 } 630 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 631 } else { 632 switch (width) { 633 case bus_width_1: 634 value = EXT_CSD_BUS_WIDTH_1; 635 break; 636 case bus_width_4: 637 value = EXT_CSD_BUS_WIDTH_4; 638 break; 639 case bus_width_8: 640 value = EXT_CSD_BUS_WIDTH_8; 641 break; 642 default: 643 return (MMC_ERR_INVALID); 644 } 645 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 646 value); 647 } 648 return (err); 649} 650 651static int 652mmc_set_timing(struct mmc_softc *sc, int timing) 653{ 654 int err; 655 uint8_t value; 656 u_char switch_res[64]; 657 658 switch (timing) { 659 case bus_timing_normal: 660 value = 0; 661 break; 662 case bus_timing_hs: 663 value = 1; 664 break; 665 default: 666 return (MMC_ERR_INVALID); 667 } 668 if (mmcbr_get_mode(sc->dev) == mode_sd) 669 err = mmc_sd_switch(sc, SD_SWITCH_MODE_SET, SD_SWITCH_GROUP1, 670 value, switch_res); 671 else 672 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 673 EXT_CSD_HS_TIMING, value); 674 return (err); 675} 676 677static int 678mmc_test_bus_width(struct mmc_softc *sc) 679{ 680 struct mmc_command cmd; 681 struct mmc_data data; 682 int err; 683 uint8_t buf[8]; 684 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 685 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 686 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 687 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 688 689 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 690 mmcbr_set_bus_width(sc->dev, bus_width_8); 691 mmcbr_update_ios(sc->dev); 692 693 cmd.opcode = MMC_BUSTEST_W; 694 cmd.arg = 0; 695 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 696 cmd.data = &data; 697 698 data.data = p8; 699 data.len = 8; 700 data.flags = MMC_DATA_WRITE; 701 mmc_wait_for_cmd(sc, &cmd, 0); 702 703 cmd.opcode = MMC_BUSTEST_R; 704 cmd.arg = 0; 705 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 706 cmd.data = &data; 707 708 data.data = buf; 709 data.len = 8; 710 data.flags = MMC_DATA_READ; 711 err = mmc_wait_for_cmd(sc, &cmd, 0); 712 713 mmcbr_set_bus_width(sc->dev, bus_width_1); 714 mmcbr_update_ios(sc->dev); 715 716 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 717 return (bus_width_8); 718 } 719 720 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 721 mmcbr_set_bus_width(sc->dev, bus_width_4); 722 mmcbr_update_ios(sc->dev); 723 724 cmd.opcode = MMC_BUSTEST_W; 725 cmd.arg = 0; 726 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 727 cmd.data = &data; 728 729 data.data = p4; 730 data.len = 4; 731 data.flags = MMC_DATA_WRITE; 732 mmc_wait_for_cmd(sc, &cmd, 0); 733 734 cmd.opcode = MMC_BUSTEST_R; 735 cmd.arg = 0; 736 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 737 cmd.data = &data; 738 739 data.data = buf; 740 data.len = 4; 741 data.flags = MMC_DATA_READ; 742 err = mmc_wait_for_cmd(sc, &cmd, 0); 743 744 mmcbr_set_bus_width(sc->dev, bus_width_1); 745 mmcbr_update_ios(sc->dev); 746 747 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 748 return (bus_width_4); 749 } 750 return (bus_width_1); 751} 752 753static uint32_t 754mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) 755{ 756 const int i = (bit_len / 32) - (start / 32) - 1; 757 const int shift = start & 31; 758 uint32_t retval = bits[i] >> shift; 759 if (size + shift > 32) 760 retval |= bits[i - 1] << (32 - shift); 761 return (retval & ((1llu << size) - 1)); 762} 763 764static void 765mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 766{ 767 int i; 768 769 /* There's no version info, so we take it on faith */ 770 memset(cid, 0, sizeof(*cid)); 771 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 772 cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); 773 for (i = 0; i < 5; i++) 774 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 775 cid->pnm[5] = 0; 776 cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); 777 cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); 778 cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2000; 779 cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); 780} 781 782static void 783mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 784{ 785 int i; 786 787 /* There's no version info, so we take it on faith */ 788 memset(cid, 0, sizeof(*cid)); 789 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 790 cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); 791 for (i = 0; i < 6; i++) 792 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 793 cid->pnm[6] = 0; 794 cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); 795 cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); 796 cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); 797 cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; 798} 799 800static void 801mmc_format_card_id_string(struct mmc_ivars *ivar) 802{ 803 char oidstr[8]; 804 uint8_t c1; 805 uint8_t c2; 806 807 /* 808 * Format a card ID string for use by the mmcsd driver, it's what 809 * appears between the <> in the following: 810 * mmcsd0: 968MB <SD SD01G 8.0 SN 2686905 Mfg 08/2008 by 3 TN> at mmc0 811 * 22.5MHz/4bit/128-block 812 * 813 * The card_id_string in mmc_ivars is currently allocated as 64 bytes, 814 * and our max formatted length is currently 55 bytes if every field 815 * contains the largest value. 816 * 817 * Sometimes the oid is two printable ascii chars; when it's not, 818 * format it as 0xnnnn instead. 819 */ 820 c1 = (ivar->cid.oid >> 8) & 0x0ff; 821 c2 = ivar->cid.oid & 0x0ff; 822 if (c1 > 0x1f && c1 < 0x7f && c2 > 0x1f && c2 < 0x7f) 823 snprintf(oidstr, sizeof(oidstr), "%c%c", c1, c2); 824 else 825 snprintf(oidstr, sizeof(oidstr), "0x%04x", ivar->cid.oid); 826 snprintf(ivar->card_id_string, sizeof(ivar->card_id_string), 827 "%s%s %s %d.%d SN %d MFG %02d/%04d by %d %s", 828 ivar->mode == mode_sd ? "SD" : "MMC", ivar->high_cap ? "HC" : "", 829 ivar->cid.pnm, ivar->cid.prv >> 4, ivar->cid.prv & 0x0f, 830 ivar->cid.psn, ivar->cid.mdt_month, ivar->cid.mdt_year, 831 ivar->cid.mid, oidstr); 832} 833 834static const int exp[8] = { 835 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 836}; 837 838static const int mant[16] = { 839 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 840}; 841 842static const int cur_min[8] = { 843 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 844}; 845 846static const int cur_max[8] = { 847 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 848}; 849 850static void 851mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 852{ 853 int v; 854 int m; 855 int e; 856 857 memset(csd, 0, sizeof(*csd)); 858 csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); 859 if (v == 0) { 860 m = mmc_get_bits(raw_csd, 128, 115, 4); 861 e = mmc_get_bits(raw_csd, 128, 112, 3); 862 csd->tacc = exp[e] * mant[m] + 9 / 10; 863 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 864 m = mmc_get_bits(raw_csd, 128, 99, 4); 865 e = mmc_get_bits(raw_csd, 128, 96, 3); 866 csd->tran_speed = exp[e] * 10000 * mant[m]; 867 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 868 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 869 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 870 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 871 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 872 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 873 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 874 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 875 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 876 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 877 m = mmc_get_bits(raw_csd, 128, 62, 12); 878 e = mmc_get_bits(raw_csd, 128, 47, 3); 879 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 880 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 881 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 882 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 883 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 884 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 885 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 886 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 887 } else if (v == 1) { 888 m = mmc_get_bits(raw_csd, 128, 115, 4); 889 e = mmc_get_bits(raw_csd, 128, 112, 3); 890 csd->tacc = exp[e] * mant[m] + 9 / 10; 891 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 892 m = mmc_get_bits(raw_csd, 128, 99, 4); 893 e = mmc_get_bits(raw_csd, 128, 96, 3); 894 csd->tran_speed = exp[e] * 10000 * mant[m]; 895 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 896 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 897 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 898 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 899 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 900 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 901 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 902 512 * 1024; 903 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 904 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 905 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 906 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 907 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 908 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 909 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 910 } else 911 panic("unknown SD CSD version"); 912} 913 914static void 915mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 916{ 917 int m; 918 int e; 919 920 memset(csd, 0, sizeof(*csd)); 921 csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); 922 csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); 923 m = mmc_get_bits(raw_csd, 128, 115, 4); 924 e = mmc_get_bits(raw_csd, 128, 112, 3); 925 csd->tacc = exp[e] * mant[m] + 9 / 10; 926 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 927 m = mmc_get_bits(raw_csd, 128, 99, 4); 928 e = mmc_get_bits(raw_csd, 128, 96, 3); 929 csd->tran_speed = exp[e] * 10000 * mant[m]; 930 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 931 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 932 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 933 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 934 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 935 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 936 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 937 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 938 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 939 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 940 m = mmc_get_bits(raw_csd, 128, 62, 12); 941 e = mmc_get_bits(raw_csd, 128, 47, 3); 942 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 943 csd->erase_blk_en = 0; 944 csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * 945 (mmc_get_bits(raw_csd, 128, 37, 5) + 1); 946 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); 947 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 948 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 949 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 950 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 951} 952 953static void 954mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 955{ 956 unsigned int scr_struct; 957 958 memset(scr, 0, sizeof(*scr)); 959 960 scr_struct = mmc_get_bits(raw_scr, 64, 60, 4); 961 if (scr_struct != 0) { 962 printf("Unrecognised SCR structure version %d\n", 963 scr_struct); 964 return; 965 } 966 scr->sda_vsn = mmc_get_bits(raw_scr, 64, 56, 4); 967 scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); 968} 969 970static void 971mmc_app_decode_sd_status(uint32_t *raw_sd_status, 972 struct mmc_sd_status *sd_status) 973{ 974 975 memset(sd_status, 0, sizeof(*sd_status)); 976 977 sd_status->bus_width = mmc_get_bits(raw_sd_status, 512, 510, 2); 978 sd_status->secured_mode = mmc_get_bits(raw_sd_status, 512, 509, 1); 979 sd_status->card_type = mmc_get_bits(raw_sd_status, 512, 480, 16); 980 sd_status->prot_area = mmc_get_bits(raw_sd_status, 512, 448, 12); 981 sd_status->speed_class = mmc_get_bits(raw_sd_status, 512, 440, 8); 982 sd_status->perf_move = mmc_get_bits(raw_sd_status, 512, 432, 8); 983 sd_status->au_size = mmc_get_bits(raw_sd_status, 512, 428, 4); 984 sd_status->erase_size = mmc_get_bits(raw_sd_status, 512, 408, 16); 985 sd_status->erase_timeout = mmc_get_bits(raw_sd_status, 512, 402, 6); 986 sd_status->erase_offset = mmc_get_bits(raw_sd_status, 512, 400, 2); 987} 988 989static int 990mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 991{ 992 struct mmc_command cmd; 993 int err; 994 995 cmd.opcode = MMC_ALL_SEND_CID; 996 cmd.arg = 0; 997 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 998 cmd.data = NULL; 999 err = mmc_wait_for_cmd(sc, &cmd, 0); 1000 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 1001 return (err); 1002} 1003 1004static int 1005mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 1006{ 1007 struct mmc_command cmd; 1008 int err; 1009 1010 cmd.opcode = MMC_SEND_CSD; 1011 cmd.arg = rca << 16; 1012 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 1013 cmd.data = NULL; 1014 err = mmc_wait_for_cmd(sc, &cmd, 0); 1015 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 1016 return (err); 1017} 1018 1019static int 1020mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 1021{ 1022 int err; 1023 struct mmc_command cmd; 1024 struct mmc_data data; 1025 1026 memset(&cmd, 0, sizeof(struct mmc_command)); 1027 memset(&data, 0, sizeof(struct mmc_data)); 1028 1029 memset(rawscr, 0, 8); 1030 cmd.opcode = ACMD_SEND_SCR; 1031 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1032 cmd.arg = 0; 1033 cmd.data = &data; 1034 1035 data.data = rawscr; 1036 data.len = 8; 1037 data.flags = MMC_DATA_READ; 1038 1039 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1040 rawscr[0] = be32toh(rawscr[0]); 1041 rawscr[1] = be32toh(rawscr[1]); 1042 return (err); 1043} 1044 1045static int 1046mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 1047{ 1048 int err; 1049 struct mmc_command cmd; 1050 struct mmc_data data; 1051 1052 memset(&cmd, 0, sizeof(struct mmc_command)); 1053 memset(&data, 0, sizeof(struct mmc_data)); 1054 1055 memset(rawextcsd, 0, 512); 1056 cmd.opcode = MMC_SEND_EXT_CSD; 1057 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1058 cmd.arg = 0; 1059 cmd.data = &data; 1060 1061 data.data = rawextcsd; 1062 data.len = 512; 1063 data.flags = MMC_DATA_READ; 1064 1065 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 1066 return (err); 1067} 1068 1069static int 1070mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, uint32_t *rawsdstatus) 1071{ 1072 int err, i; 1073 struct mmc_command cmd; 1074 struct mmc_data data; 1075 1076 memset(&cmd, 0, sizeof(struct mmc_command)); 1077 memset(&data, 0, sizeof(struct mmc_data)); 1078 1079 memset(rawsdstatus, 0, 64); 1080 cmd.opcode = ACMD_SD_STATUS; 1081 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1082 cmd.arg = 0; 1083 cmd.data = &data; 1084 1085 data.data = rawsdstatus; 1086 data.len = 64; 1087 data.flags = MMC_DATA_READ; 1088 1089 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1090 for (i = 0; i < 16; i++) 1091 rawsdstatus[i] = be32toh(rawsdstatus[i]); 1092 return (err); 1093} 1094 1095static int 1096mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 1097{ 1098 struct mmc_command cmd; 1099 int err; 1100 1101 cmd.opcode = MMC_SET_RELATIVE_ADDR; 1102 cmd.arg = resp << 16; 1103 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1104 cmd.data = NULL; 1105 err = mmc_wait_for_cmd(sc, &cmd, 0); 1106 return (err); 1107} 1108 1109static int 1110mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1111{ 1112 struct mmc_command cmd; 1113 int err; 1114 1115 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1116 cmd.arg = 0; 1117 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1118 cmd.data = NULL; 1119 err = mmc_wait_for_cmd(sc, &cmd, 0); 1120 *resp = cmd.resp[0]; 1121 return (err); 1122} 1123 1124static void 1125mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard) 1126{ 1127 device_printf(dev, "Card at relative address %d%s:\n", 1128 ivar->rca, newcard ? " added" : ""); 1129 device_printf(dev, " card: %s\n", ivar->card_id_string); 1130 device_printf(dev, " bus: %ubit, %uMHz%s\n", 1131 (ivar->bus_width == bus_width_1 ? 1 : 1132 (ivar->bus_width == bus_width_4 ? 4 : 8)), 1133 (ivar->timing == bus_timing_hs ? 1134 ivar->hs_tran_speed : ivar->tran_speed) / 1000000, 1135 ivar->timing == bus_timing_hs ? ", high speed timing" : ""); 1136 device_printf(dev, " memory: %u blocks, erase sector %u blocks%s\n", 1137 ivar->sec_count, ivar->erase_sector, 1138 ivar->read_only ? ", read-only" : ""); 1139} 1140 1141static void 1142mmc_discover_cards(struct mmc_softc *sc) 1143{ 1144 struct mmc_ivars *ivar = NULL; 1145 device_t *devlist; 1146 int err, i, devcount, newcard; 1147 uint32_t raw_cid[4]; 1148 uint32_t resp, sec_count; 1149 device_t child; 1150 uint16_t rca = 2; 1151 u_char switch_res[64]; 1152 1153 if (bootverbose || mmc_debug) 1154 device_printf(sc->dev, "Probing cards\n"); 1155 while (1) { 1156 err = mmc_all_send_cid(sc, raw_cid); 1157 if (err == MMC_ERR_TIMEOUT) 1158 break; 1159 if (err != MMC_ERR_NONE) { 1160 device_printf(sc->dev, "Error reading CID %d\n", err); 1161 break; 1162 } 1163 newcard = 1; 1164 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1165 return; 1166 for (i = 0; i < devcount; i++) { 1167 ivar = device_get_ivars(devlist[i]); 1168 if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) { 1169 newcard = 0; 1170 break; 1171 } 1172 } 1173 free(devlist, M_TEMP); 1174 if (bootverbose || mmc_debug) { 1175 device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n", 1176 newcard ? "New c" : "C", 1177 raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]); 1178 } 1179 if (newcard) { 1180 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1181 M_WAITOK | M_ZERO); 1182 if (!ivar) 1183 return; 1184 memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid)); 1185 } 1186 if (mmcbr_get_ro(sc->dev)) 1187 ivar->read_only = 1; 1188 ivar->bus_width = bus_width_1; 1189 ivar->timing = bus_timing_normal; 1190 ivar->mode = mmcbr_get_mode(sc->dev); 1191 if (ivar->mode == mode_sd) { 1192 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1193 mmc_send_relative_addr(sc, &resp); 1194 ivar->rca = resp >> 16; 1195 /* Get card CSD. */ 1196 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1197 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1198 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1199 if (ivar->csd.csd_structure > 0) 1200 ivar->high_cap = 1; 1201 ivar->tran_speed = ivar->csd.tran_speed; 1202 ivar->erase_sector = ivar->csd.erase_sector * 1203 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1204 /* Get card SCR. Card must be selected to fetch it. */ 1205 mmc_select_card(sc, ivar->rca); 1206 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1207 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1208 /* Get card switch capabilities (command class 10). */ 1209 if ((ivar->scr.sda_vsn >= 1) && 1210 (ivar->csd.ccc & (1<<10))) { 1211 mmc_sd_switch(sc, SD_SWITCH_MODE_CHECK, 1212 SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE, 1213 switch_res); 1214 if (switch_res[13] & 2) { 1215 ivar->timing = bus_timing_hs; 1216 ivar->hs_tran_speed = SD_MAX_HS; 1217 } 1218 } 1219 mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); 1220 mmc_app_decode_sd_status(ivar->raw_sd_status, 1221 &ivar->sd_status); 1222 if (ivar->sd_status.au_size != 0) { 1223 ivar->erase_sector = 1224 16 << ivar->sd_status.au_size; 1225 } 1226 mmc_select_card(sc, 0); 1227 /* Find max supported bus width. */ 1228 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1229 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1230 ivar->bus_width = bus_width_4; 1231 mmc_format_card_id_string(ivar); 1232 if (bootverbose || mmc_debug) 1233 mmc_log_card(sc->dev, ivar, newcard); 1234 if (newcard) { 1235 /* Add device. */ 1236 child = device_add_child(sc->dev, NULL, -1); 1237 device_set_ivars(child, ivar); 1238 } 1239 return; 1240 } 1241 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1242 ivar->rca = rca++; 1243 mmc_set_relative_addr(sc, ivar->rca); 1244 /* Get card CSD. */ 1245 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1246 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1247 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1248 ivar->tran_speed = ivar->csd.tran_speed; 1249 ivar->erase_sector = ivar->csd.erase_sector * 1250 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1251 /* Only MMC >= 4.x cards support EXT_CSD. */ 1252 if (ivar->csd.spec_vers >= 4) { 1253 /* Card must be selected to fetch EXT_CSD. */ 1254 mmc_select_card(sc, ivar->rca); 1255 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1256 /* Handle extended capacity from EXT_CSD */ 1257 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1258 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1259 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1260 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1261 if (sec_count != 0) { 1262 ivar->sec_count = sec_count; 1263 ivar->high_cap = 1; 1264 } 1265 /* Get card speed in high speed mode. */ 1266 ivar->timing = bus_timing_hs; 1267 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1268 & EXT_CSD_CARD_TYPE_52) 1269 ivar->hs_tran_speed = MMC_TYPE_52_MAX_HS; 1270 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1271 & EXT_CSD_CARD_TYPE_26) 1272 ivar->hs_tran_speed = MMC_TYPE_26_MAX_HS; 1273 else 1274 ivar->hs_tran_speed = ivar->tran_speed; 1275 /* Find max supported bus width. */ 1276 ivar->bus_width = mmc_test_bus_width(sc); 1277 mmc_select_card(sc, 0); 1278 /* Handle HC erase sector size. */ 1279 if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) { 1280 ivar->erase_sector = 1024 * 1281 ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE]; 1282 mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 1283 EXT_CSD_ERASE_GRP_DEF, 1); 1284 } 1285 } else { 1286 ivar->bus_width = bus_width_1; 1287 ivar->timing = bus_timing_normal; 1288 } 1289 mmc_format_card_id_string(ivar); 1290 if (bootverbose || mmc_debug) 1291 mmc_log_card(sc->dev, ivar, newcard); 1292 if (newcard) { 1293 /* Add device. */ 1294 child = device_add_child(sc->dev, NULL, -1); 1295 device_set_ivars(child, ivar); 1296 } 1297 } 1298} 1299 1300static void 1301mmc_rescan_cards(struct mmc_softc *sc) 1302{ 1303 struct mmc_ivars *ivar = NULL; 1304 device_t *devlist; 1305 int err, i, devcount; 1306 1307 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1308 return; 1309 for (i = 0; i < devcount; i++) { 1310 ivar = device_get_ivars(devlist[i]); 1311 if (mmc_select_card(sc, ivar->rca)) { 1312 if (bootverbose || mmc_debug) 1313 device_printf(sc->dev, "Card at relative address %d lost.\n", 1314 ivar->rca); 1315 device_delete_child(sc->dev, devlist[i]); 1316 free(ivar, M_DEVBUF); 1317 } 1318 } 1319 free(devlist, M_TEMP); 1320 mmc_select_card(sc, 0); 1321} 1322 1323static int 1324mmc_delete_cards(struct mmc_softc *sc) 1325{ 1326 struct mmc_ivars *ivar; 1327 device_t *devlist; 1328 int err, i, devcount; 1329 1330 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1331 return (err); 1332 for (i = 0; i < devcount; i++) { 1333 ivar = device_get_ivars(devlist[i]); 1334 if (bootverbose || mmc_debug) 1335 device_printf(sc->dev, "Card at relative address %d deleted.\n", 1336 ivar->rca); 1337 device_delete_child(sc->dev, devlist[i]); 1338 free(ivar, M_DEVBUF); 1339 } 1340 free(devlist, M_TEMP); 1341 return (0); 1342} 1343 1344static void 1345mmc_go_discovery(struct mmc_softc *sc) 1346{ 1347 uint32_t ocr; 1348 device_t dev; 1349 int err; 1350 1351 dev = sc->dev; 1352 if (mmcbr_get_power_mode(dev) != power_on) { 1353 /* 1354 * First, try SD modes 1355 */ 1356 mmcbr_set_mode(dev, mode_sd); 1357 mmc_power_up(sc); 1358 mmcbr_set_bus_mode(dev, pushpull); 1359 if (bootverbose || mmc_debug) 1360 device_printf(sc->dev, "Probing bus\n"); 1361 mmc_idle_cards(sc); 1362 err = mmc_send_if_cond(sc, 1); 1363 if ((bootverbose || mmc_debug) && err == 0) 1364 device_printf(sc->dev, "SD 2.0 interface conditions: OK\n"); 1365 if (mmc_send_app_op_cond(sc, err ? 0 : MMC_OCR_CCS, &ocr) != 1366 MMC_ERR_NONE) { 1367 if (bootverbose || mmc_debug) 1368 device_printf(sc->dev, "SD probe: failed\n"); 1369 /* 1370 * Failed, try MMC 1371 */ 1372 mmcbr_set_mode(dev, mode_mmc); 1373 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 1374 if (bootverbose || mmc_debug) 1375 device_printf(sc->dev, "MMC probe: failed\n"); 1376 ocr = 0; /* Failed both, powerdown. */ 1377 } else if (bootverbose || mmc_debug) 1378 device_printf(sc->dev, 1379 "MMC probe: OK (OCR: 0x%08x)\n", ocr); 1380 } else if (bootverbose || mmc_debug) 1381 device_printf(sc->dev, "SD probe: OK (OCR: 0x%08x)\n", ocr); 1382 1383 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1384 if (mmcbr_get_ocr(dev) != 0) 1385 mmc_idle_cards(sc); 1386 } else { 1387 mmcbr_set_bus_mode(dev, opendrain); 1388 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1389 mmcbr_update_ios(dev); 1390 /* XXX recompute vdd based on new cards? */ 1391 } 1392 /* 1393 * Make sure that we have a mutually agreeable voltage to at least 1394 * one card on the bus. 1395 */ 1396 if (bootverbose || mmc_debug) 1397 device_printf(sc->dev, "Current OCR: 0x%08x\n", mmcbr_get_ocr(dev)); 1398 if (mmcbr_get_ocr(dev) == 0) { 1399 mmc_delete_cards(sc); 1400 mmc_power_down(sc); 1401 return; 1402 } 1403 /* 1404 * Reselect the cards after we've idled them above. 1405 */ 1406 if (mmcbr_get_mode(dev) == mode_sd) { 1407 err = mmc_send_if_cond(sc, 1); 1408 mmc_send_app_op_cond(sc, 1409 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1410 } else 1411 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1412 mmc_discover_cards(sc); 1413 mmc_rescan_cards(sc); 1414 1415 mmcbr_set_bus_mode(dev, pushpull); 1416 mmcbr_update_ios(dev); 1417 mmc_calculate_clock(sc); 1418 bus_generic_attach(dev); 1419/* mmc_update_children_sysctl(dev);*/ 1420} 1421 1422static int 1423mmc_calculate_clock(struct mmc_softc *sc) 1424{ 1425 int max_dtr, max_hs_dtr, max_timing; 1426 int nkid, i, f_min, f_max; 1427 device_t *kids; 1428 struct mmc_ivars *ivar; 1429 1430 f_min = mmcbr_get_f_min(sc->dev); 1431 f_max = mmcbr_get_f_max(sc->dev); 1432 max_dtr = max_hs_dtr = f_max; 1433 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1434 max_timing = bus_timing_hs; 1435 else 1436 max_timing = bus_timing_normal; 1437 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1438 panic("can't get children"); 1439 for (i = 0; i < nkid; i++) { 1440 ivar = device_get_ivars(kids[i]); 1441 if (ivar->timing < max_timing) 1442 max_timing = ivar->timing; 1443 if (ivar->tran_speed < max_dtr) 1444 max_dtr = ivar->tran_speed; 1445 if (ivar->hs_tran_speed < max_hs_dtr) 1446 max_hs_dtr = ivar->hs_tran_speed; 1447 } 1448 for (i = 0; i < nkid; i++) { 1449 ivar = device_get_ivars(kids[i]); 1450 if (ivar->timing == bus_timing_normal) 1451 continue; 1452 mmc_select_card(sc, ivar->rca); 1453 mmc_set_timing(sc, max_timing); 1454 } 1455 mmc_select_card(sc, 0); 1456 free(kids, M_TEMP); 1457 if (max_timing == bus_timing_hs) 1458 max_dtr = max_hs_dtr; 1459 if (bootverbose || mmc_debug) { 1460 device_printf(sc->dev, 1461 "setting transfer rate to %d.%03dMHz%s\n", 1462 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1463 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1464 } 1465 mmcbr_set_timing(sc->dev, max_timing); 1466 mmcbr_set_clock(sc->dev, max_dtr); 1467 mmcbr_update_ios(sc->dev); 1468 return max_dtr; 1469} 1470 1471static void 1472mmc_scan(struct mmc_softc *sc) 1473{ 1474 device_t dev = sc->dev; 1475 1476 mmc_acquire_bus(dev, dev); 1477 mmc_go_discovery(sc); 1478 mmc_release_bus(dev, dev); 1479} 1480 1481static int 1482mmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) 1483{ 1484 struct mmc_ivars *ivar = device_get_ivars(child); 1485 1486 switch (which) { 1487 default: 1488 return (EINVAL); 1489 case MMC_IVAR_DSR_IMP: 1490 *result = ivar->csd.dsr_imp; 1491 break; 1492 case MMC_IVAR_MEDIA_SIZE: 1493 *result = ivar->sec_count; 1494 break; 1495 case MMC_IVAR_RCA: 1496 *result = ivar->rca; 1497 break; 1498 case MMC_IVAR_SECTOR_SIZE: 1499 *result = MMC_SECTOR_SIZE; 1500 break; 1501 case MMC_IVAR_TRAN_SPEED: 1502 *result = mmcbr_get_clock(bus); 1503 break; 1504 case MMC_IVAR_READ_ONLY: 1505 *result = ivar->read_only; 1506 break; 1507 case MMC_IVAR_HIGH_CAP: 1508 *result = ivar->high_cap; 1509 break; 1510 case MMC_IVAR_CARD_TYPE: 1511 *result = ivar->mode; 1512 break; 1513 case MMC_IVAR_BUS_WIDTH: 1514 *result = ivar->bus_width; 1515 break; 1516 case MMC_IVAR_ERASE_SECTOR: 1517 *result = ivar->erase_sector; 1518 break; 1519 case MMC_IVAR_MAX_DATA: 1520 *result = mmcbr_get_max_data(bus); 1521 break; 1522 case MMC_IVAR_CARD_ID_STRING: 1523 *(char **)result = ivar->card_id_string; 1524 break; 1525 } 1526 return (0); 1527} 1528 1529static int 1530mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1531{ 1532 /* 1533 * None are writable ATM 1534 */ 1535 return (EINVAL); 1536} 1537 1538 1539static void 1540mmc_delayed_attach(void *xsc) 1541{ 1542 struct mmc_softc *sc = xsc; 1543 1544 mmc_scan(sc); 1545 config_intrhook_disestablish(&sc->config_intrhook); 1546} 1547 1548static int 1549mmc_child_location_str(device_t dev, device_t child, char *buf, 1550 size_t buflen) 1551{ 1552 1553 snprintf(buf, buflen, "rca=0x%04x", mmc_get_rca(child)); 1554 return (0); 1555} 1556 1557static device_method_t mmc_methods[] = { 1558 /* device_if */ 1559 DEVMETHOD(device_probe, mmc_probe), 1560 DEVMETHOD(device_attach, mmc_attach), 1561 DEVMETHOD(device_detach, mmc_detach), 1562 DEVMETHOD(device_suspend, mmc_suspend), 1563 DEVMETHOD(device_resume, mmc_resume), 1564 1565 /* Bus interface */ 1566 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1567 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1568 DEVMETHOD(bus_child_location_str, mmc_child_location_str), 1569 1570 /* MMC Bus interface */ 1571 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1572 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1573 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1574 1575 DEVMETHOD_END 1576}; 1577 1578static driver_t mmc_driver = { 1579 "mmc", 1580 mmc_methods, 1581 sizeof(struct mmc_softc), 1582}; 1583static devclass_t mmc_devclass; 1584 1585DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, NULL, NULL); 1586DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, NULL, NULL); 1587