mmc.c revision 183763
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 183763 2008-10-11 13:05:13Z 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 66#include <dev/mmc/mmcreg.h> 67#include <dev/mmc/mmcbrvar.h> 68#include <dev/mmc/mmcvar.h> 69#include "mmcbr_if.h" 70#include "mmcbus_if.h" 71 72struct mmc_softc { 73 device_t dev; 74 struct mtx sc_mtx; 75 struct intr_config_hook config_intrhook; 76 device_t owner; 77 uint32_t last_rca; 78}; 79 80/* 81 * Per-card data 82 */ 83struct mmc_ivars { 84 uint32_t raw_cid[4]; /* Raw bits of the CID */ 85 uint32_t raw_csd[4]; /* Raw bits of the CSD */ 86 uint32_t raw_scr[2]; /* Raw bits of the SCR */ 87 uint8_t raw_ext_csd[512]; /* Raw bits of the EXT_CSD */ 88 uint16_t rca; 89 enum mmc_card_mode mode; 90 struct mmc_cid cid; /* cid decoded */ 91 struct mmc_csd csd; /* csd decoded */ 92 struct mmc_scr scr; /* scr decoded */ 93 u_char read_only; /* True when the device is read-only */ 94 u_char bus_width; /* Bus width to use */ 95 u_char timing; /* Bus timing support */ 96 u_char high_cap; /* High Capacity card (block addressed) */ 97 uint32_t sec_count; /* Card capacity in 512byte blocks */ 98 uint32_t tran_speed; /* Max speed in normal mode */ 99 uint32_t hs_tran_speed; /* Max speed in high speed mode */ 100}; 101 102#define CMD_RETRIES 3 103 104/* bus entry points */ 105static int mmc_probe(device_t dev); 106static int mmc_attach(device_t dev); 107static int mmc_detach(device_t dev); 108 109#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 110#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 111#define MMC_LOCK_INIT(_sc) \ 112 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 113 "mmc", MTX_DEF) 114#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 115#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 116#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 117 118static int mmc_calculate_clock(struct mmc_softc *sc); 119static void mmc_delayed_attach(void *); 120static void mmc_power_down(struct mmc_softc *sc); 121static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 122 int retries); 123static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 124 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 125static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 126static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 127static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 128static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 129static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 130 131static void 132mmc_ms_delay(int ms) 133{ 134 DELAY(1000 * ms); /* XXX BAD */ 135} 136 137static int 138mmc_probe(device_t dev) 139{ 140 141 device_set_desc(dev, "MMC/SD bus"); 142 return (0); 143} 144 145static int 146mmc_attach(device_t dev) 147{ 148 struct mmc_softc *sc; 149 150 sc = device_get_softc(dev); 151 sc->dev = dev; 152 MMC_LOCK_INIT(sc); 153 154 /* We'll probe and attach our children later, but before / mount */ 155 sc->config_intrhook.ich_func = mmc_delayed_attach; 156 sc->config_intrhook.ich_arg = sc; 157 if (config_intrhook_establish(&sc->config_intrhook) != 0) 158 device_printf(dev, "config_intrhook_establish failed\n"); 159 return (0); 160} 161 162static int 163mmc_detach(device_t dev) 164{ 165 struct mmc_softc *sc = device_get_softc(dev); 166 device_t *kids; 167 int i, nkid; 168 169 /* kill children [ph33r]. -sorbo */ 170 if (device_get_children(sc->dev, &kids, &nkid) != 0) 171 return (0); 172 for (i = 0; i < nkid; i++) { 173 device_t kid = kids[i]; 174 void *ivar = device_get_ivars(kid); 175 176 device_detach(kid); 177 device_delete_child(sc->dev, kid); 178 free(ivar, M_DEVBUF); 179 } 180 free(kids, M_TEMP); 181 mmc_power_down(sc); 182 183 MMC_LOCK_DESTROY(sc); 184 185 return (0); 186} 187 188static int 189mmc_acquire_bus(device_t busdev, device_t dev) 190{ 191 struct mmc_softc *sc; 192 struct mmc_ivars *ivar; 193 int err; 194 int rca; 195 196 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 197 if (err) 198 return (err); 199 sc = device_get_softc(busdev); 200 MMC_LOCK(sc); 201 if (sc->owner) 202 panic("mmc: host bridge didn't seralize us."); 203 sc->owner = dev; 204 MMC_UNLOCK(sc); 205 206 if (busdev != dev) { 207 /* 208 * Keep track of the last rca that we've selected. If 209 * we're asked to do it again, don't. We never 210 * unselect unless the bus code itself wants the mmc 211 * bus, and constantly reselecting causes problems. 212 */ 213 rca = mmc_get_rca(dev); 214 if (sc->last_rca != rca) { 215 mmc_select_card(sc, rca); 216 sc->last_rca = rca; 217 /* Prepare bus width for the new card. */ 218 ivar = device_get_ivars(dev); 219 if (bootverbose) { 220 device_printf(busdev, 221 "setting bus width to %d bits\n", 222 (ivar->bus_width == bus_width_4)?4: 223 (ivar->bus_width == bus_width_8)?8:1); 224 } 225 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 226 mmcbr_set_bus_width(busdev, ivar->bus_width); 227 mmcbr_update_ios(busdev); 228 } 229 } else { 230 /* 231 * If there's a card selected, stand down. 232 */ 233 if (sc->last_rca != 0) { 234 mmc_select_card(sc, 0); 235 sc->last_rca = 0; 236 } 237 } 238 239 return (0); 240} 241 242static int 243mmc_release_bus(device_t busdev, device_t dev) 244{ 245 struct mmc_softc *sc; 246 int err; 247 248 sc = device_get_softc(busdev); 249 250 MMC_LOCK(sc); 251 if (!sc->owner) 252 panic("mmc: releasing unowned bus."); 253 if (sc->owner != dev) 254 panic("mmc: you don't own the bus. game over."); 255 MMC_UNLOCK(sc); 256 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 257 if (err) 258 return (err); 259 MMC_LOCK(sc); 260 sc->owner = NULL; 261 MMC_UNLOCK(sc); 262 return (0); 263} 264 265static void 266mmc_rescan_cards(struct mmc_softc *sc) 267{ 268 /* XXX: Look at the children and see if they respond to status */ 269} 270 271static uint32_t 272mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 273{ 274 275 return (ocr & MMC_OCR_VOLTAGE); 276} 277 278static int 279mmc_highest_voltage(uint32_t ocr) 280{ 281 int i; 282 283 for (i = 30; i >= 0; i--) 284 if (ocr & (1 << i)) 285 return (i); 286 return (-1); 287} 288 289static void 290mmc_wakeup(struct mmc_request *req) 291{ 292 struct mmc_softc *sc; 293 294/* printf("Wakeup for req %p done_data %p\n", req, req->done_data); */ 295 sc = (struct mmc_softc *)req->done_data; 296 MMC_LOCK(sc); 297 req->flags |= MMC_REQ_DONE; 298 wakeup(req); 299 MMC_UNLOCK(sc); 300} 301 302static int 303mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 304{ 305 int err; 306 307 req->done = mmc_wakeup; 308 req->done_data = sc; 309/* printf("Submitting request %p sc %p\n", req, sc); */ 310 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 311 MMC_LOCK(sc); 312 do { 313 err = msleep(req, &sc->sc_mtx, PZERO | PCATCH, "mmcreq", 314 hz / 10); 315 } while (!(req->flags & MMC_REQ_DONE) && err == EAGAIN); 316/* printf("Request %p done with error %d\n", req, err); */ 317 MMC_UNLOCK(sc); 318 return (err); 319} 320 321static int 322mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 323{ 324 struct mmc_softc *sc = device_get_softc(brdev); 325 326 return (mmc_wait_for_req(sc, req)); 327} 328 329static int 330mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 331{ 332 struct mmc_request mreq; 333 334 memset(&mreq, 0, sizeof(mreq)); 335 memset(cmd->resp, 0, sizeof(cmd->resp)); 336 cmd->retries = retries; 337 mreq.cmd = cmd; 338/* printf("CMD: %x ARG %x\n", cmd->opcode, cmd->arg); */ 339 mmc_wait_for_req(sc, &mreq); 340 return (cmd->error); 341} 342 343static int 344mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 345 struct mmc_command *cmd, int retries) 346{ 347 struct mmc_command appcmd; 348 int err = MMC_ERR_NONE, i; 349 350 for (i = 0; i <= retries; i++) { 351 appcmd.opcode = MMC_APP_CMD; 352 appcmd.arg = rca << 16; 353 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 354 appcmd.data = NULL; 355 mmc_wait_for_cmd(sc, &appcmd, 0); 356 err = appcmd.error; 357 if (err != MMC_ERR_NONE) 358 continue; 359 if (!(appcmd.resp[0] & R1_APP_CMD)) 360 return MMC_ERR_FAILED; 361 mmc_wait_for_cmd(sc, cmd, 0); 362 err = cmd->error; 363 if (err == MMC_ERR_NONE) 364 break; 365 } 366 return (err); 367} 368 369static int 370mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 371 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 372{ 373 struct mmc_command cmd; 374 int err; 375 376 memset(&cmd, 0, sizeof(cmd)); 377 cmd.opcode = opcode; 378 cmd.arg = arg; 379 cmd.flags = flags; 380 cmd.data = NULL; 381 err = mmc_wait_for_cmd(sc, &cmd, retries); 382 if (err) 383 return (err); 384 if (cmd.error) 385 return (cmd.error); 386 if (resp) { 387 if (flags & MMC_RSP_136) 388 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 389 else 390 *resp = cmd.resp[0]; 391 } 392 return (0); 393} 394 395static void 396mmc_idle_cards(struct mmc_softc *sc) 397{ 398 device_t dev; 399 struct mmc_command cmd; 400 401 dev = sc->dev; 402 mmcbr_set_chip_select(dev, cs_high); 403 mmcbr_update_ios(dev); 404 mmc_ms_delay(1); 405 406 memset(&cmd, 0, sizeof(cmd)); 407 cmd.opcode = MMC_GO_IDLE_STATE; 408 cmd.arg = 0; 409 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 410 cmd.data = NULL; 411 mmc_wait_for_cmd(sc, &cmd, 0); 412 mmc_ms_delay(1); 413 414 mmcbr_set_chip_select(dev, cs_dontcare); 415 mmcbr_update_ios(dev); 416 mmc_ms_delay(1); 417} 418 419static int 420mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 421{ 422 struct mmc_command cmd; 423 int err = MMC_ERR_NONE, i; 424 425 memset(&cmd, 0, sizeof(cmd)); 426 cmd.opcode = ACMD_SD_SEND_OP_COND; 427 cmd.arg = ocr; 428 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 429 cmd.data = NULL; 430 431 for (i = 0; i < 100; i++) { 432 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 433 if (err != MMC_ERR_NONE) 434 break; 435 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 436 (ocr & MMC_OCR_VOLTAGE) == 0) 437 break; 438 err = MMC_ERR_TIMEOUT; 439 mmc_ms_delay(10); 440 } 441 if (rocr && err == MMC_ERR_NONE) 442 *rocr = cmd.resp[0]; 443 return (err); 444} 445 446static int 447mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 448{ 449 struct mmc_command cmd; 450 int err = MMC_ERR_NONE, i; 451 452 memset(&cmd, 0, sizeof(cmd)); 453 cmd.opcode = MMC_SEND_OP_COND; 454 cmd.arg = ocr; 455 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 456 cmd.data = NULL; 457 458 for (i = 0; i < 100; i++) { 459 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 460 if (err != MMC_ERR_NONE) 461 break; 462 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 463 (ocr & MMC_OCR_VOLTAGE) == 0) 464 break; 465 err = MMC_ERR_TIMEOUT; 466 mmc_ms_delay(10); 467 } 468 if (rocr && err == MMC_ERR_NONE) 469 *rocr = cmd.resp[0]; 470 return (err); 471} 472 473static int 474mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 475{ 476 struct mmc_command cmd; 477 int err; 478 479 memset(&cmd, 0, sizeof(cmd)); 480 cmd.opcode = SD_SEND_IF_COND; 481 cmd.arg = (vhs << 8) + 0xAA; 482 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 483 cmd.data = NULL; 484 485 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 486 return (err); 487} 488 489static void 490mmc_power_up(struct mmc_softc *sc) 491{ 492 device_t dev; 493 494 dev = sc->dev; 495 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 496 mmcbr_set_bus_mode(dev, opendrain); 497 mmcbr_set_chip_select(dev, cs_dontcare); 498 mmcbr_set_bus_width(dev, bus_width_1); 499 mmcbr_set_power_mode(dev, power_up); 500 mmcbr_set_clock(dev, 0); 501 mmcbr_update_ios(dev); 502 mmc_ms_delay(1); 503 504 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 505 mmcbr_set_timing(dev, bus_timing_normal); 506 mmcbr_set_power_mode(dev, power_on); 507 mmcbr_update_ios(dev); 508 mmc_ms_delay(2); 509} 510 511static void 512mmc_power_down(struct mmc_softc *sc) 513{ 514 device_t dev = sc->dev; 515 516 mmcbr_set_bus_mode(dev, opendrain); 517 mmcbr_set_chip_select(dev, cs_dontcare); 518 mmcbr_set_bus_width(dev, bus_width_1); 519 mmcbr_set_power_mode(dev, power_off); 520 mmcbr_set_clock(dev, 0); 521 mmcbr_set_timing(dev, bus_timing_normal); 522 mmcbr_update_ios(dev); 523} 524 525static int 526mmc_select_card(struct mmc_softc *sc, uint16_t rca) 527{ 528 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, ((uint32_t)rca) << 16, 529 MMC_RSP_R1B | MMC_CMD_AC, NULL, CMD_RETRIES)); 530} 531 532static int 533mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 534{ 535 struct mmc_command cmd; 536 int err; 537 538 cmd.opcode = MMC_SWITCH_FUNC; 539 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 540 (index << 16) | 541 (value << 8) | 542 set; 543 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 544 cmd.data = NULL; 545 err = mmc_wait_for_cmd(sc, &cmd, 0); 546 return (err); 547} 548 549static int 550mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, uint8_t *res) 551{ 552 int err; 553 struct mmc_command cmd; 554 struct mmc_data data; 555 556 memset(&cmd, 0, sizeof(struct mmc_command)); 557 memset(&data, 0, sizeof(struct mmc_data)); 558 559 memset(res, 0, 64); 560 cmd.opcode = SD_SWITCH_FUNC; 561 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 562 cmd.arg = mode << 31; 563 cmd.arg |= 0x00FFFFFF; 564 cmd.arg &= ~(0xF << (grp * 4)); 565 cmd.arg |= value << (grp * 4); 566 cmd.data = &data; 567 568 data.data = res; 569 data.len = 64; 570 data.flags = MMC_DATA_READ; 571 572 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 573 return (err); 574} 575 576static int 577mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 578{ 579 int err; 580 581 if (mmcbr_get_mode(sc->dev) == mode_sd) { 582 struct mmc_command cmd; 583 584 memset(&cmd, 0, sizeof(struct mmc_command)); 585 cmd.opcode = ACMD_SET_BUS_WIDTH; 586 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 587 switch (width) { 588 case bus_width_1: 589 cmd.arg = SD_BUS_WIDTH_1; 590 break; 591 case bus_width_4: 592 cmd.arg = SD_BUS_WIDTH_4; 593 break; 594 default: 595 return (MMC_ERR_INVALID); 596 } 597 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 598 } else { 599 uint8_t value; 600 601 switch (width) { 602 case bus_width_1: 603 value = EXT_CSD_BUS_WIDTH_1; 604 break; 605 case bus_width_4: 606 value = EXT_CSD_BUS_WIDTH_4; 607 break; 608 case bus_width_8: 609 value = EXT_CSD_BUS_WIDTH_8; 610 break; 611 default: 612 return (MMC_ERR_INVALID); 613 } 614 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, value); 615 } 616 return (err); 617} 618 619static int 620mmc_set_timing(struct mmc_softc *sc, int timing) 621{ 622 int err; 623 uint8_t value; 624 625 switch (timing) { 626 case bus_timing_normal: 627 value = 0; 628 break; 629 case bus_timing_hs: 630 value = 1; 631 break; 632 default: 633 return (MMC_ERR_INVALID); 634 } 635 if (mmcbr_get_mode(sc->dev) == mode_sd) { 636 u_char switch_res[64]; 637 638 err = mmc_sd_switch(sc, 1, 0, value, switch_res); 639 } else { 640 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 641 EXT_CSD_HS_TIMING, value); 642 } 643 return (err); 644} 645 646static int 647mmc_test_bus_width(struct mmc_softc *sc) 648{ 649 struct mmc_command cmd; 650 struct mmc_data data; 651 int err; 652 uint8_t buf[8]; 653 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 654 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 655 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 656 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 657 658 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 659 mmcbr_set_bus_width(sc->dev, bus_width_8); 660 mmcbr_update_ios(sc->dev); 661 662 cmd.opcode = MMC_BUSTEST_W; 663 cmd.arg = 0; 664 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 665 cmd.data = &data; 666 667 data.data = p8; 668 data.len = 8; 669 data.flags = MMC_DATA_WRITE; 670 mmc_wait_for_cmd(sc, &cmd, 0); 671 672 cmd.opcode = MMC_BUSTEST_R; 673 cmd.arg = 0; 674 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 675 cmd.data = &data; 676 677 data.data = buf; 678 data.len = 8; 679 data.flags = MMC_DATA_READ; 680 err = mmc_wait_for_cmd(sc, &cmd, 0); 681 682 mmcbr_set_bus_width(sc->dev, bus_width_1); 683 mmcbr_update_ios(sc->dev); 684 685 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 686 return (bus_width_8); 687 } 688 689 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 690 mmcbr_set_bus_width(sc->dev, bus_width_4); 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 = p4; 699 data.len = 4; 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 = 4; 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, p4ok, 4) == 0) 717 return (bus_width_4); 718 } 719 return (bus_width_1); 720} 721 722static uint32_t 723mmc_get_bits(uint32_t *bits, int start, int size) 724{ 725 const int bit_len = 128; 726 const int i = (bit_len / 32) - (start / 32) - 1; 727 const int shift = start & 31; 728 uint32_t retval = bits[i] >> shift; 729 if (size + shift > 32) 730 retval |= bits[i - 1] << (32 - shift); 731 return (retval & ((1 << size) - 1)); 732} 733 734static void 735mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 736{ 737 int i; 738 739 /* There's no version info, so we take it on faith */ 740 memset(cid, 0, sizeof(*cid)); 741 cid->mid = mmc_get_bits(raw_cid, 120, 8); 742 cid->oid = mmc_get_bits(raw_cid, 104, 16); 743 for (i = 0; i < 5; i++) 744 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 745 cid->prv = mmc_get_bits(raw_cid, 56, 8); 746 cid->psn = mmc_get_bits(raw_cid, 24, 32); 747 cid->mdt_year = mmc_get_bits(raw_cid, 12, 8) + 2001; 748 cid->mdt_month = mmc_get_bits(raw_cid, 8, 4); 749} 750 751static void 752mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 753{ 754 int i; 755 756 /* There's no version info, so we take it on faith */ 757 memset(cid, 0, sizeof(*cid)); 758 cid->mid = mmc_get_bits(raw_cid, 120, 8); 759 cid->oid = mmc_get_bits(raw_cid, 104, 8); 760 for (i = 0; i < 6; i++) 761 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 762 cid->prv = mmc_get_bits(raw_cid, 48, 8); 763 cid->psn = mmc_get_bits(raw_cid, 16, 32); 764 cid->mdt_month = mmc_get_bits(raw_cid, 12, 4); 765 cid->mdt_year = mmc_get_bits(raw_cid, 8, 4) + 1997; 766} 767 768static const int exp[8] = { 769 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 770}; 771static const int mant[16] = { 772 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 773}; 774static const int cur_min[8] = { 775 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 776}; 777static const int cur_max[8] = { 778 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 779}; 780 781static void 782mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 783{ 784 int v; 785 int m; 786 int e; 787 788 memset(csd, 0, sizeof(*csd)); 789 csd->csd_structure = v = mmc_get_bits(raw_csd, 126, 2); 790 if (v == 0) { 791 m = mmc_get_bits(raw_csd, 115, 4); 792 e = mmc_get_bits(raw_csd, 112, 3); 793 csd->tacc = exp[e] * mant[m] + 9 / 10; 794 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 795 m = mmc_get_bits(raw_csd, 99, 4); 796 e = mmc_get_bits(raw_csd, 96, 3); 797 csd->tran_speed = exp[e] * 10000 * mant[m]; 798 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 799 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 800 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 801 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 802 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 803 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 804 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 805 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 806 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 807 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 808 m = mmc_get_bits(raw_csd, 62, 12); 809 e = mmc_get_bits(raw_csd, 47, 3); 810 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 811 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 812 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 813 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 814 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 815 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 816 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 817 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 818 } else if (v == 1) { 819 m = mmc_get_bits(raw_csd, 115, 4); 820 e = mmc_get_bits(raw_csd, 112, 3); 821 csd->tacc = exp[e] * mant[m] + 9 / 10; 822 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 823 m = mmc_get_bits(raw_csd, 99, 4); 824 e = mmc_get_bits(raw_csd, 96, 3); 825 csd->tran_speed = exp[e] * 10000 * mant[m]; 826 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 827 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 828 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 829 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 830 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 831 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 832 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 48, 22) + 1) * 833 512 * 1024; 834 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 835 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 836 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 837 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 838 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 839 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 840 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 841 } else 842 panic("unknown SD CSD version"); 843} 844 845static void 846mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 847{ 848 int m; 849 int e; 850 851 memset(csd, 0, sizeof(*csd)); 852 csd->csd_structure = mmc_get_bits(raw_csd, 126, 2); 853 csd->spec_vers = mmc_get_bits(raw_csd, 122, 4); 854 m = mmc_get_bits(raw_csd, 115, 4); 855 e = mmc_get_bits(raw_csd, 112, 3); 856 csd->tacc = exp[e] * mant[m] + 9 / 10; 857 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 858 m = mmc_get_bits(raw_csd, 99, 4); 859 e = mmc_get_bits(raw_csd, 96, 3); 860 csd->tran_speed = exp[e] * 10000 * mant[m]; 861 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 862 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 863 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 864 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 865 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 866 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 867 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 868 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 869 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 870 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 871 m = mmc_get_bits(raw_csd, 62, 12); 872 e = mmc_get_bits(raw_csd, 47, 3); 873 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 874// csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 875// csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 876 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 5); 877 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 878 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 879 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 880 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 881} 882 883static void 884mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 885{ 886 unsigned int scr_struct; 887 uint32_t tmp[4]; 888 889 tmp[3] = raw_scr[1]; 890 tmp[2] = raw_scr[0]; 891 892 memset(scr, 0, sizeof(*scr)); 893 894 scr_struct = mmc_get_bits(tmp, 60, 4); 895 if (scr_struct != 0) { 896 printf("Unrecognised SCR structure version %d\n", 897 scr_struct); 898 return; 899 } 900 scr->sda_vsn = mmc_get_bits(tmp, 56, 4); 901 scr->bus_widths = mmc_get_bits(tmp, 48, 4); 902} 903 904static int 905mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 906{ 907 struct mmc_command cmd; 908 int err; 909 910 cmd.opcode = MMC_ALL_SEND_CID; 911 cmd.arg = 0; 912 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 913 cmd.data = NULL; 914 err = mmc_wait_for_cmd(sc, &cmd, 0); 915 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 916 return (err); 917} 918 919static int 920mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 921{ 922 struct mmc_command cmd; 923 int err; 924 925 cmd.opcode = MMC_SEND_CSD; 926 cmd.arg = rca << 16; 927 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 928 cmd.data = NULL; 929 err = mmc_wait_for_cmd(sc, &cmd, 0); 930 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 931 return (err); 932} 933 934static int 935mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 936{ 937 int err; 938 struct mmc_command cmd; 939 struct mmc_data data; 940 941 memset(&cmd, 0, sizeof(struct mmc_command)); 942 memset(&data, 0, sizeof(struct mmc_data)); 943 944 memset(rawscr, 0, 8); 945 cmd.opcode = ACMD_SEND_SCR; 946 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 947 cmd.arg = 0; 948 cmd.data = &data; 949 950 data.data = rawscr; 951 data.len = 8; 952 data.flags = MMC_DATA_READ; 953 954 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 955 rawscr[0] = be32toh(rawscr[0]); 956 rawscr[1] = be32toh(rawscr[1]); 957 return (err); 958} 959 960static int 961mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 962{ 963 int err; 964 struct mmc_command cmd; 965 struct mmc_data data; 966 967 memset(&cmd, 0, sizeof(struct mmc_command)); 968 memset(&data, 0, sizeof(struct mmc_data)); 969 970 memset(rawextcsd, 0, 512); 971 cmd.opcode = MMC_SEND_EXT_CSD; 972 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 973 cmd.arg = 0; 974 cmd.data = &data; 975 976 data.data = rawextcsd; 977 data.len = 512; 978 data.flags = MMC_DATA_READ; 979 980 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 981 return (err); 982} 983 984static int 985mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 986{ 987 struct mmc_command cmd; 988 int err; 989 990 cmd.opcode = MMC_SET_RELATIVE_ADDR; 991 cmd.arg = resp << 16; 992 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 993 cmd.data = NULL; 994 err = mmc_wait_for_cmd(sc, &cmd, 0); 995 return (err); 996} 997 998static int 999mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1000{ 1001 struct mmc_command cmd; 1002 int err; 1003 1004 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1005 cmd.arg = 0; 1006 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1007 cmd.data = NULL; 1008 err = mmc_wait_for_cmd(sc, &cmd, 0); 1009 *resp = cmd.resp[0]; 1010 return (err); 1011} 1012 1013static void 1014mmc_discover_cards(struct mmc_softc *sc) 1015{ 1016 struct mmc_ivars *ivar; 1017 int err; 1018 uint32_t resp, sec_count; 1019 device_t child; 1020 uint16_t rca = 2; 1021 u_char switch_res[64]; 1022 1023 while (1) { 1024 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1025 M_WAITOK | M_ZERO); 1026 if (!ivar) 1027 return; 1028 err = mmc_all_send_cid(sc, ivar->raw_cid); 1029 if (err == MMC_ERR_TIMEOUT) 1030 break; 1031 if (err != MMC_ERR_NONE) { 1032 device_printf(sc->dev, "Error reading CID %d\n", err); 1033 break; 1034 } 1035 if (mmcbr_get_ro(sc->dev)) 1036 ivar->read_only = 1; 1037 ivar->bus_width = bus_width_1; 1038 ivar->mode = mmcbr_get_mode(sc->dev); 1039 if (ivar->mode == mode_sd) { 1040 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1041 mmc_send_relative_addr(sc, &resp); 1042 ivar->rca = resp >> 16; 1043 /* Get card CSD. */ 1044 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1045 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1046 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1047 if (ivar->csd.csd_structure > 0) 1048 ivar->high_cap = 1; 1049 ivar->tran_speed = ivar->csd.tran_speed; 1050 /* Get card SCR. Card must be selected to fetch it. */ 1051 mmc_select_card(sc, ivar->rca); 1052 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1053 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1054 /* Get card switch capabilities. */ 1055 if ((ivar->scr.sda_vsn >= 1) && 1056 (ivar->csd.ccc & (1<<10))) { 1057 mmc_sd_switch(sc, 0, 0, 0xF, switch_res); 1058 if (switch_res[13] & 2) { 1059 ivar->timing = bus_timing_hs; 1060 ivar->hs_tran_speed = 50000000; 1061 } 1062 } 1063 mmc_select_card(sc, 0); 1064 /* Find max supported bus width. */ 1065 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1066 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1067 ivar->bus_width = bus_width_4; 1068 /* Add device. */ 1069 child = device_add_child(sc->dev, NULL, -1); 1070 device_set_ivars(child, ivar); 1071 return; 1072 } 1073 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1074 ivar->rca = rca++; 1075 mmc_set_relative_addr(sc, ivar->rca); 1076 /* Get card CSD. */ 1077 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1078 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1079 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1080 ivar->tran_speed = ivar->csd.tran_speed; 1081 /* Only MMC >= 4.x cards support EXT_CSD. */ 1082 if (ivar->csd.spec_vers >= 4) { 1083 /* Card must be selected to fetch EXT_CSD. */ 1084 mmc_select_card(sc, ivar->rca); 1085 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1086 /* Handle extended capacity from EXT_CSD */ 1087 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1088 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1089 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1090 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1091 if (sec_count != 0) { 1092 ivar->sec_count = sec_count; 1093 ivar->high_cap = 1; 1094 } 1095 /* Get card speed in high speed mode. */ 1096 ivar->timing = bus_timing_hs; 1097 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1098 & EXT_CSD_CARD_TYPE_52) 1099 ivar->hs_tran_speed = 52000000; 1100 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1101 & EXT_CSD_CARD_TYPE_26) 1102 ivar->hs_tran_speed = 26000000; 1103 else 1104 ivar->hs_tran_speed = ivar->tran_speed; 1105 /* Find max supported bus width. */ 1106 ivar->bus_width = mmc_test_bus_width(sc); 1107 mmc_select_card(sc, 0); 1108 } else { 1109 ivar->bus_width = bus_width_1; 1110 ivar->timing = bus_timing_normal; 1111 } 1112 /* Add device. */ 1113 child = device_add_child(sc->dev, NULL, -1); 1114 device_set_ivars(child, ivar); 1115 } 1116 free(ivar, M_DEVBUF); 1117} 1118 1119static void 1120mmc_go_discovery(struct mmc_softc *sc) 1121{ 1122 uint32_t ocr; 1123 device_t dev; 1124 int err; 1125 1126 dev = sc->dev; 1127 if (mmcbr_get_power_mode(dev) != power_on) { 1128 /* 1129 * First, try SD modes 1130 */ 1131 mmcbr_set_mode(dev, mode_sd); 1132 mmc_power_up(sc); 1133 mmcbr_set_bus_mode(dev, pushpull); 1134 mmc_idle_cards(sc); 1135 err = mmc_send_if_cond(sc, 1); 1136 if (mmc_send_app_op_cond(sc, err?0:MMC_OCR_CCS, &ocr) != 1137 MMC_ERR_NONE) { 1138 /* 1139 * Failed, try MMC 1140 */ 1141 mmcbr_set_mode(dev, mode_mmc); 1142 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) 1143 return; /* Failed both, punt! XXX powerdown? */ 1144 } 1145 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1146 if (mmcbr_get_ocr(dev) != 0) 1147 mmc_idle_cards(sc); 1148 } else { 1149 mmcbr_set_bus_mode(dev, opendrain); 1150 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1151 mmcbr_update_ios(dev); 1152 /* XXX recompute vdd based on new cards? */ 1153 } 1154 /* 1155 * Make sure that we have a mutually agreeable voltage to at least 1156 * one card on the bus. 1157 */ 1158 if (mmcbr_get_ocr(dev) == 0) 1159 return; 1160 /* 1161 * Reselect the cards after we've idled them above. 1162 */ 1163 if (mmcbr_get_mode(dev) == mode_sd) { 1164 err = mmc_send_if_cond(sc, 1); 1165 mmc_send_app_op_cond(sc, 1166 (err?0:MMC_OCR_CCS)|mmcbr_get_ocr(dev), NULL); 1167 } else 1168 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1169 mmc_discover_cards(sc); 1170 1171 mmcbr_set_bus_mode(dev, pushpull); 1172 mmcbr_update_ios(dev); 1173 mmc_calculate_clock(sc); 1174 bus_generic_attach(dev); 1175/* mmc_update_children_sysctl(dev);*/ 1176} 1177 1178static int 1179mmc_calculate_clock(struct mmc_softc *sc) 1180{ 1181 int max_dtr, max_hs_dtr, max_timing; 1182 int nkid, i, f_min, f_max; 1183 device_t *kids; 1184 struct mmc_ivars *ivar; 1185 1186 f_min = mmcbr_get_f_min(sc->dev); 1187 f_max = mmcbr_get_f_max(sc->dev); 1188 max_dtr = max_hs_dtr = f_max; 1189 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1190 max_timing = bus_timing_hs; 1191 else 1192 max_timing = bus_timing_normal; 1193 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1194 panic("can't get children"); 1195 for (i = 0; i < nkid; i++) { 1196 ivar = device_get_ivars(kids[i]); 1197 if (ivar->timing < max_timing) 1198 max_timing = ivar->timing; 1199 if (ivar->tran_speed < max_dtr) 1200 max_dtr = ivar->tran_speed; 1201 if (ivar->hs_tran_speed < max_dtr) 1202 max_hs_dtr = ivar->hs_tran_speed; 1203 } 1204 for (i = 0; i < nkid; i++) { 1205 ivar = device_get_ivars(kids[i]); 1206 if (ivar->timing == bus_timing_normal) 1207 continue; 1208 mmc_select_card(sc, ivar->rca); 1209 mmc_set_timing(sc, max_timing); 1210 } 1211 mmc_select_card(sc, 0); 1212 free(kids, M_TEMP); 1213 if (max_timing == bus_timing_hs) 1214 max_dtr = max_hs_dtr; 1215 if (bootverbose) { 1216 device_printf(sc->dev, "setting transfer rate to %d.%03dMHz%s\n", 1217 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1218 (max_timing == bus_timing_hs)?" with high speed timing":""); 1219 } 1220 mmcbr_set_timing(sc->dev, max_timing); 1221 mmcbr_set_clock(sc->dev, max_dtr); 1222 mmcbr_update_ios(sc->dev); 1223 return max_dtr; 1224} 1225 1226static void 1227mmc_scan(struct mmc_softc *sc) 1228{ 1229 device_t dev; 1230 1231 dev = sc->dev; 1232 mmc_acquire_bus(dev, dev); 1233 1234 if (mmcbr_get_power_mode(dev) == power_on) 1235 mmc_rescan_cards(sc); 1236 mmc_go_discovery(sc); 1237 1238 mmc_release_bus(dev, dev); 1239 /* XXX probe/attach/detach children? */ 1240} 1241 1242static int 1243mmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 1244{ 1245 struct mmc_ivars *ivar = device_get_ivars(child); 1246 1247 switch (which) { 1248 default: 1249 return (EINVAL); 1250 case MMC_IVAR_DSR_IMP: 1251 *(int *)result = ivar->csd.dsr_imp; 1252 break; 1253 case MMC_IVAR_MEDIA_SIZE: 1254 *(off_t *)result = ivar->sec_count; 1255 break; 1256 case MMC_IVAR_RCA: 1257 *(int *)result = ivar->rca; 1258 break; 1259 case MMC_IVAR_SECTOR_SIZE: 1260 *(int *)result = MMC_SECTOR_SIZE; 1261 break; 1262 case MMC_IVAR_TRAN_SPEED: 1263 *(int *)result = mmcbr_get_clock(bus); 1264 break; 1265 case MMC_IVAR_READ_ONLY: 1266 *(int *)result = ivar->read_only; 1267 break; 1268 case MMC_IVAR_HIGH_CAP: 1269 *(int *)result = ivar->high_cap; 1270 break; 1271 case MMC_IVAR_CARD_TYPE: 1272 *(int *)result = ivar->mode; 1273 break; 1274 case MMC_IVAR_BUS_WIDTH: 1275 *(int *)result = ivar->bus_width; 1276 break; 1277 } 1278 return (0); 1279} 1280 1281static int 1282mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1283{ 1284 /* 1285 * None are writable ATM 1286 */ 1287 return (EINVAL); 1288} 1289 1290 1291static void 1292mmc_delayed_attach(void *xsc) 1293{ 1294 struct mmc_softc *sc = xsc; 1295 1296 mmc_scan(sc); 1297 config_intrhook_disestablish(&sc->config_intrhook); 1298} 1299 1300static device_method_t mmc_methods[] = { 1301 /* device_if */ 1302 DEVMETHOD(device_probe, mmc_probe), 1303 DEVMETHOD(device_attach, mmc_attach), 1304 DEVMETHOD(device_detach, mmc_detach), 1305 1306 /* Bus interface */ 1307 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1308 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1309 1310 /* MMC Bus interface */ 1311 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1312 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1313 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1314 1315 {0, 0}, 1316}; 1317 1318static driver_t mmc_driver = { 1319 "mmc", 1320 mmc_methods, 1321 sizeof(struct mmc_softc), 1322}; 1323static devclass_t mmc_devclass; 1324 1325 1326DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 1327DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, 0, 0); 1328