mmc.c revision 183731
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 183731 2008-10-09 20:09:56Z 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 void mmc_delayed_attach(void *); 119static void mmc_power_down(struct mmc_softc *sc); 120static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 121 int retries); 122static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 123 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 124static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 125static int mmc_set_bus_width(struct mmc_softc *sc, uint16_t rca, int width); 126static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr); 127static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 128static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 129 130static void 131mmc_ms_delay(int ms) 132{ 133 DELAY(1000 * ms); /* XXX BAD */ 134} 135 136static int 137mmc_probe(device_t dev) 138{ 139 140 device_set_desc(dev, "MMC/SD bus"); 141 return (0); 142} 143 144static int 145mmc_attach(device_t dev) 146{ 147 struct mmc_softc *sc; 148 149 sc = device_get_softc(dev); 150 sc->dev = dev; 151 MMC_LOCK_INIT(sc); 152 153 /* We'll probe and attach our children later, but before / mount */ 154 sc->config_intrhook.ich_func = mmc_delayed_attach; 155 sc->config_intrhook.ich_arg = sc; 156 if (config_intrhook_establish(&sc->config_intrhook) != 0) 157 device_printf(dev, "config_intrhook_establish failed\n"); 158 return (0); 159} 160 161static int 162mmc_detach(device_t dev) 163{ 164 struct mmc_softc *sc = device_get_softc(dev); 165 device_t *kids; 166 int i, nkid; 167 168 /* kill children [ph33r]. -sorbo */ 169 if (device_get_children(sc->dev, &kids, &nkid) != 0) 170 return (0); 171 for (i = 0; i < nkid; i++) { 172 device_t kid = kids[i]; 173 void *ivar = device_get_ivars(kid); 174 175 device_detach(kid); 176 device_delete_child(sc->dev, kid); 177 free(ivar, M_DEVBUF); 178 } 179 free(kids, M_TEMP); 180 mmc_power_down(sc); 181 182 MMC_LOCK_DESTROY(sc); 183 184 return (0); 185} 186 187static int 188mmc_acquire_bus(device_t busdev, device_t dev) 189{ 190 struct mmc_softc *sc; 191 struct mmc_ivars *ivar; 192 int err; 193 int rca; 194 195 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 196 if (err) 197 return (err); 198 sc = device_get_softc(busdev); 199 MMC_LOCK(sc); 200 if (sc->owner) 201 panic("mmc: host bridge didn't seralize us."); 202 sc->owner = dev; 203 MMC_UNLOCK(sc); 204 205 if (busdev != dev) { 206 /* 207 * Keep track of the last rca that we've selected. If 208 * we're asked to do it again, don't. We never 209 * unselect unless the bus code itself wants the mmc 210 * bus, and constantly reselecting causes problems. 211 */ 212 rca = mmc_get_rca(dev); 213 if (sc->last_rca != rca) { 214 mmc_select_card(sc, rca); 215 sc->last_rca = rca; 216 /* Prepare bus width for the new card. */ 217 ivar = device_get_ivars(dev); 218 device_printf(busdev, 219 "setting bus width to %d bits\n", 220 (ivar->bus_width == bus_width_4)?4: 221 (ivar->bus_width == bus_width_8)?8:1); 222 mmc_set_bus_width(sc, rca, ivar->bus_width); 223 mmcbr_set_bus_width(busdev, ivar->bus_width); 224 mmcbr_update_ios(busdev); 225 } 226 } else { 227 /* 228 * If there's a card selected, stand down. 229 */ 230 if (sc->last_rca != 0) { 231 mmc_select_card(sc, 0); 232 sc->last_rca = 0; 233 } 234 } 235 236 return (0); 237} 238 239static int 240mmc_release_bus(device_t busdev, device_t dev) 241{ 242 struct mmc_softc *sc; 243 int err; 244 245 sc = device_get_softc(busdev); 246 247 MMC_LOCK(sc); 248 if (!sc->owner) 249 panic("mmc: releasing unowned bus."); 250 if (sc->owner != dev) 251 panic("mmc: you don't own the bus. game over."); 252 MMC_UNLOCK(sc); 253 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 254 if (err) 255 return (err); 256 MMC_LOCK(sc); 257 sc->owner = NULL; 258 MMC_UNLOCK(sc); 259 return (0); 260} 261 262static void 263mmc_rescan_cards(struct mmc_softc *sc) 264{ 265 /* XXX: Look at the children and see if they respond to status */ 266} 267 268static uint32_t 269mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 270{ 271 272 return (ocr & MMC_OCR_VOLTAGE); 273} 274 275static int 276mmc_highest_voltage(uint32_t ocr) 277{ 278 int i; 279 280 for (i = 30; i >= 0; i--) 281 if (ocr & (1 << i)) 282 return (i); 283 return (-1); 284} 285 286static void 287mmc_wakeup(struct mmc_request *req) 288{ 289 struct mmc_softc *sc; 290 291/* printf("Wakeup for req %p done_data %p\n", req, req->done_data); */ 292 sc = (struct mmc_softc *)req->done_data; 293 MMC_LOCK(sc); 294 req->flags |= MMC_REQ_DONE; 295 wakeup(req); 296 MMC_UNLOCK(sc); 297} 298 299static int 300mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 301{ 302 int err; 303 304 req->done = mmc_wakeup; 305 req->done_data = sc; 306/* printf("Submitting request %p sc %p\n", req, sc); */ 307 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 308 MMC_LOCK(sc); 309 do { 310 err = msleep(req, &sc->sc_mtx, PZERO | PCATCH, "mmcreq", 311 hz / 10); 312 } while (!(req->flags & MMC_REQ_DONE) && err == EAGAIN); 313/* printf("Request %p done with error %d\n", req, err); */ 314 MMC_UNLOCK(sc); 315 return (err); 316} 317 318static int 319mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 320{ 321 struct mmc_softc *sc = device_get_softc(brdev); 322 323 return (mmc_wait_for_req(sc, req)); 324} 325 326static int 327mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 328{ 329 struct mmc_request mreq; 330 331 memset(&mreq, 0, sizeof(mreq)); 332 memset(cmd->resp, 0, sizeof(cmd->resp)); 333 cmd->retries = retries; 334 mreq.cmd = cmd; 335/* printf("CMD: %x ARG %x\n", cmd->opcode, cmd->arg); */ 336 mmc_wait_for_req(sc, &mreq); 337 return (cmd->error); 338} 339 340static int 341mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 342 struct mmc_command *cmd, int retries) 343{ 344 struct mmc_command appcmd; 345 int err = MMC_ERR_NONE, i; 346 347 for (i = 0; i <= retries; i++) { 348 appcmd.opcode = MMC_APP_CMD; 349 appcmd.arg = rca << 16; 350 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 351 appcmd.data = NULL; 352 mmc_wait_for_cmd(sc, &appcmd, 0); 353 err = appcmd.error; 354 if (err != MMC_ERR_NONE) 355 continue; 356 if (!(appcmd.resp[0] & R1_APP_CMD)) 357 return MMC_ERR_FAILED; 358 mmc_wait_for_cmd(sc, cmd, 0); 359 err = cmd->error; 360 if (err == MMC_ERR_NONE) 361 break; 362 } 363 return (err); 364} 365 366static int 367mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 368 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 369{ 370 struct mmc_command cmd; 371 int err; 372 373 memset(&cmd, 0, sizeof(cmd)); 374 cmd.opcode = opcode; 375 cmd.arg = arg; 376 cmd.flags = flags; 377 cmd.data = NULL; 378 err = mmc_wait_for_cmd(sc, &cmd, retries); 379 if (err) 380 return (err); 381 if (cmd.error) 382 return (cmd.error); 383 if (resp) { 384 if (flags & MMC_RSP_136) 385 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 386 else 387 *resp = cmd.resp[0]; 388 } 389 return (0); 390} 391 392static void 393mmc_idle_cards(struct mmc_softc *sc) 394{ 395 device_t dev; 396 struct mmc_command cmd; 397 398 dev = sc->dev; 399 mmcbr_set_chip_select(dev, cs_high); 400 mmcbr_update_ios(dev); 401 mmc_ms_delay(1); 402 403 memset(&cmd, 0, sizeof(cmd)); 404 cmd.opcode = MMC_GO_IDLE_STATE; 405 cmd.arg = 0; 406 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 407 cmd.data = NULL; 408 mmc_wait_for_cmd(sc, &cmd, 0); 409 mmc_ms_delay(1); 410 411 mmcbr_set_chip_select(dev, cs_dontcare); 412 mmcbr_update_ios(dev); 413 mmc_ms_delay(1); 414} 415 416static int 417mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 418{ 419 struct mmc_command cmd; 420 int err = MMC_ERR_NONE, i; 421 422 memset(&cmd, 0, sizeof(cmd)); 423 cmd.opcode = ACMD_SD_SEND_OP_COND; 424 cmd.arg = ocr; 425 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 426 cmd.data = NULL; 427 428 for (i = 0; i < 100; i++) { 429 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 430 if (err != MMC_ERR_NONE) 431 break; 432 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 433 (ocr & MMC_OCR_VOLTAGE) == 0) 434 break; 435 err = MMC_ERR_TIMEOUT; 436 mmc_ms_delay(10); 437 } 438 if (rocr && err == MMC_ERR_NONE) 439 *rocr = cmd.resp[0]; 440 return (err); 441} 442 443static int 444mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 445{ 446 struct mmc_command cmd; 447 int err = MMC_ERR_NONE, i; 448 449 memset(&cmd, 0, sizeof(cmd)); 450 cmd.opcode = MMC_SEND_OP_COND; 451 cmd.arg = ocr; 452 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 453 cmd.data = NULL; 454 455 for (i = 0; i < 100; i++) { 456 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 457 if (err != MMC_ERR_NONE) 458 break; 459 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 460 (ocr & MMC_OCR_VOLTAGE) == 0) 461 break; 462 err = MMC_ERR_TIMEOUT; 463 mmc_ms_delay(10); 464 } 465 if (rocr && err == MMC_ERR_NONE) 466 *rocr = cmd.resp[0]; 467 return (err); 468} 469 470static int 471mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 472{ 473 struct mmc_command cmd; 474 int err; 475 476 memset(&cmd, 0, sizeof(cmd)); 477 cmd.opcode = SD_SEND_IF_COND; 478 cmd.arg = (vhs << 8) + 0xAA; 479 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 480 cmd.data = NULL; 481 482 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 483 return (err); 484} 485 486static void 487mmc_power_up(struct mmc_softc *sc) 488{ 489 device_t dev; 490 491 dev = sc->dev; 492 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 493 mmcbr_set_bus_mode(dev, opendrain); 494 mmcbr_set_chip_select(dev, cs_dontcare); 495 mmcbr_set_bus_width(dev, bus_width_1); 496 mmcbr_set_power_mode(dev, power_up); 497 mmcbr_set_clock(dev, 0); 498 mmcbr_update_ios(dev); 499 mmc_ms_delay(1); 500 501 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 502 mmcbr_set_timing(dev, bus_timing_normal); 503 mmcbr_set_power_mode(dev, power_on); 504 mmcbr_update_ios(dev); 505 mmc_ms_delay(2); 506} 507 508static void 509mmc_power_down(struct mmc_softc *sc) 510{ 511 device_t dev = sc->dev; 512 513 mmcbr_set_bus_mode(dev, opendrain); 514 mmcbr_set_chip_select(dev, cs_dontcare); 515 mmcbr_set_bus_width(dev, bus_width_1); 516 mmcbr_set_power_mode(dev, power_off); 517 mmcbr_set_clock(dev, 0); 518 mmcbr_set_timing(dev, bus_timing_normal); 519 mmcbr_update_ios(dev); 520} 521 522static int 523mmc_select_card(struct mmc_softc *sc, uint16_t rca) 524{ 525 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, ((uint32_t)rca) << 16, 526 MMC_RSP_R1B | MMC_CMD_AC, NULL, CMD_RETRIES)); 527} 528 529static int 530mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 531{ 532 struct mmc_command cmd; 533 int err; 534 535 cmd.opcode = MMC_SWITCH_FUNC; 536 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 537 (index << 16) | 538 (value << 8) | 539 set; 540 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 541 cmd.data = NULL; 542 err = mmc_wait_for_cmd(sc, &cmd, 0); 543 return (err); 544} 545 546static int 547mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, uint8_t *res) 548{ 549 int err; 550 struct mmc_command cmd; 551 struct mmc_data data; 552 553 memset(&cmd, 0, sizeof(struct mmc_command)); 554 memset(&data, 0, sizeof(struct mmc_data)); 555 556 memset(res, 0, 64); 557 cmd.opcode = SD_SWITCH_FUNC; 558 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 559 cmd.arg = mode << 31; 560 cmd.arg |= 0x00FFFFFF; 561 cmd.arg &= ~(0xF << (grp * 4)); 562 cmd.arg |= value << (grp * 4); 563 cmd.data = &data; 564 565 data.data = res; 566 data.len = 64; 567 data.flags = MMC_DATA_READ; 568 569 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 570 return (err); 571} 572 573static int 574mmc_set_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 575{ 576 int err; 577 578 if (mmcbr_get_mode(sc->dev) == mode_sd) { 579 struct mmc_command cmd; 580 581 memset(&cmd, 0, sizeof(struct mmc_command)); 582 cmd.opcode = ACMD_SET_BUS_WIDTH; 583 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 584 switch (width) { 585 case bus_width_1: 586 cmd.arg = SD_BUS_WIDTH_1; 587 break; 588 case bus_width_4: 589 cmd.arg = SD_BUS_WIDTH_4; 590 break; 591 default: 592 return (MMC_ERR_INVALID); 593 } 594 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 595 } else { 596 uint8_t value; 597 598 switch (width) { 599 case bus_width_1: 600 value = EXT_CSD_BUS_WIDTH_1; 601 break; 602 case bus_width_4: 603 value = EXT_CSD_BUS_WIDTH_4; 604 break; 605 case bus_width_8: 606 value = EXT_CSD_BUS_WIDTH_8; 607 break; 608 default: 609 return (MMC_ERR_INVALID); 610 } 611 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, value); 612 } 613 return (err); 614} 615 616static int 617mmc_set_timing(struct mmc_softc *sc, int timing) 618{ 619 int err; 620 uint8_t value; 621 622 switch (timing) { 623 case bus_timing_normal: 624 value = 0; 625 break; 626 case bus_timing_hs: 627 value = 1; 628 break; 629 default: 630 return (MMC_ERR_INVALID); 631 } 632 if (mmcbr_get_mode(sc->dev) == mode_sd) { 633 u_char switch_res[64]; 634 635 err = mmc_sd_switch(sc, 1, 0, value, switch_res); 636 } else { 637 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 638 EXT_CSD_HS_TIMING, value); 639 } 640 return (err); 641} 642 643static int 644mmc_test_bus_width(struct mmc_softc *sc) 645{ 646 struct mmc_command cmd; 647 struct mmc_data data; 648 int err; 649 uint8_t buf[8]; 650 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 651 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 652 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 653 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 654 655 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 656 mmcbr_set_bus_width(sc->dev, bus_width_8); 657 mmcbr_update_ios(sc->dev); 658 659 cmd.opcode = MMC_BUSTEST_W; 660 cmd.arg = 0; 661 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 662 cmd.data = &data; 663 664 data.data = p8; 665 data.len = 8; 666 data.flags = MMC_DATA_WRITE; 667 mmc_wait_for_cmd(sc, &cmd, 0); 668 669 cmd.opcode = MMC_BUSTEST_R; 670 cmd.arg = 0; 671 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 672 cmd.data = &data; 673 674 data.data = buf; 675 data.len = 8; 676 data.flags = MMC_DATA_READ; 677 err = mmc_wait_for_cmd(sc, &cmd, 0); 678 679 mmcbr_set_bus_width(sc->dev, bus_width_1); 680 mmcbr_update_ios(sc->dev); 681 682 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 683 return (bus_width_8); 684 } 685 686 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 687 mmcbr_set_bus_width(sc->dev, bus_width_4); 688 mmcbr_update_ios(sc->dev); 689 690 cmd.opcode = MMC_BUSTEST_W; 691 cmd.arg = 0; 692 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 693 cmd.data = &data; 694 695 data.data = p4; 696 data.len = 4; 697 data.flags = MMC_DATA_WRITE; 698 mmc_wait_for_cmd(sc, &cmd, 0); 699 700 cmd.opcode = MMC_BUSTEST_R; 701 cmd.arg = 0; 702 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 703 cmd.data = &data; 704 705 data.data = buf; 706 data.len = 4; 707 data.flags = MMC_DATA_READ; 708 err = mmc_wait_for_cmd(sc, &cmd, 0); 709 710 mmcbr_set_bus_width(sc->dev, bus_width_1); 711 mmcbr_update_ios(sc->dev); 712 713 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 714 return (bus_width_4); 715 } 716 return (bus_width_1); 717} 718 719static uint32_t 720mmc_get_bits(uint32_t *bits, int start, int size) 721{ 722 const int bit_len = 128; 723 const int i = (bit_len / 32) - (start / 32) - 1; 724 const int shift = start & 31; 725 uint32_t retval = bits[i] >> shift; 726 if (size + shift > 32) 727 retval |= bits[i - 1] << (32 - shift); 728 return (retval & ((1 << size) - 1)); 729} 730 731static void 732mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 733{ 734 int i; 735 736 /* There's no version info, so we take it on faith */ 737 memset(cid, 0, sizeof(*cid)); 738 cid->mid = mmc_get_bits(raw_cid, 120, 8); 739 cid->oid = mmc_get_bits(raw_cid, 104, 16); 740 for (i = 0; i < 5; i++) 741 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 742 cid->prv = mmc_get_bits(raw_cid, 56, 8); 743 cid->psn = mmc_get_bits(raw_cid, 24, 32); 744 cid->mdt_year = mmc_get_bits(raw_cid, 12, 8) + 2001; 745 cid->mdt_month = mmc_get_bits(raw_cid, 8, 4); 746} 747 748static void 749mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 750{ 751 int i; 752 753 /* There's no version info, so we take it on faith */ 754 memset(cid, 0, sizeof(*cid)); 755 cid->mid = mmc_get_bits(raw_cid, 120, 8); 756 cid->oid = mmc_get_bits(raw_cid, 104, 8); 757 for (i = 0; i < 6; i++) 758 cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 759 cid->prv = mmc_get_bits(raw_cid, 48, 8); 760 cid->psn = mmc_get_bits(raw_cid, 16, 32); 761 cid->mdt_month = mmc_get_bits(raw_cid, 12, 4); 762 cid->mdt_year = mmc_get_bits(raw_cid, 8, 4) + 1997; 763} 764 765static const int exp[8] = { 766 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 767}; 768static const int mant[16] = { 769 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 770}; 771static const int cur_min[8] = { 772 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 773}; 774static const int cur_max[8] = { 775 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 776}; 777 778static void 779mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 780{ 781 int v; 782 int m; 783 int e; 784 785 memset(csd, 0, sizeof(*csd)); 786 csd->csd_structure = v = mmc_get_bits(raw_csd, 126, 2); 787 if (v == 0) { 788 m = mmc_get_bits(raw_csd, 115, 4); 789 e = mmc_get_bits(raw_csd, 112, 3); 790 csd->tacc = exp[e] * mant[m] + 9 / 10; 791 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 792 m = mmc_get_bits(raw_csd, 99, 4); 793 e = mmc_get_bits(raw_csd, 96, 3); 794 csd->tran_speed = exp[e] * 10000 * mant[m]; 795 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 796 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 797 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 798 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 799 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 800 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 801 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 802 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 803 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 804 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 805 m = mmc_get_bits(raw_csd, 62, 12); 806 e = mmc_get_bits(raw_csd, 47, 3); 807 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 808 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 809 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 810 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 811 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 812 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 813 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 814 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 815 } else if (v == 1) { 816 m = mmc_get_bits(raw_csd, 115, 4); 817 e = mmc_get_bits(raw_csd, 112, 3); 818 csd->tacc = exp[e] * mant[m] + 9 / 10; 819 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 820 m = mmc_get_bits(raw_csd, 99, 4); 821 e = mmc_get_bits(raw_csd, 96, 3); 822 csd->tran_speed = exp[e] * 10000 * mant[m]; 823 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 824 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 825 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 826 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 827 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 828 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 829 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 48, 22) + 1) * 830 512 * 1024; 831 csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 832 csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 833 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 834 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 835 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 836 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 837 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 838 } else 839 panic("unknown SD CSD version"); 840} 841 842static void 843mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 844{ 845 int m; 846 int e; 847 848 memset(csd, 0, sizeof(*csd)); 849 csd->csd_structure = mmc_get_bits(raw_csd, 126, 2); 850 csd->spec_vers = mmc_get_bits(raw_csd, 122, 4); 851 m = mmc_get_bits(raw_csd, 115, 4); 852 e = mmc_get_bits(raw_csd, 112, 3); 853 csd->tacc = exp[e] * mant[m] + 9 / 10; 854 csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 855 m = mmc_get_bits(raw_csd, 99, 4); 856 e = mmc_get_bits(raw_csd, 96, 3); 857 csd->tran_speed = exp[e] * 10000 * mant[m]; 858 csd->ccc = mmc_get_bits(raw_csd, 84, 12); 859 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 860 csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 861 csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 862 csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 863 csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 864 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 865 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 866 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 867 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 868 m = mmc_get_bits(raw_csd, 62, 12); 869 e = mmc_get_bits(raw_csd, 47, 3); 870 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 871// csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 872// csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 873 csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 5); 874 csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 875 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 876 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 877 csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 878} 879 880static void 881mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 882{ 883 unsigned int scr_struct; 884 uint32_t tmp[4]; 885 886 tmp[3] = raw_scr[1]; 887 tmp[2] = raw_scr[0]; 888 889 memset(scr, 0, sizeof(*scr)); 890 891 scr_struct = mmc_get_bits(tmp, 60, 4); 892 if (scr_struct != 0) { 893 printf("Unrecognised SCR structure version %d\n", 894 scr_struct); 895 return; 896 } 897 scr->sda_vsn = mmc_get_bits(tmp, 56, 4); 898 scr->bus_widths = mmc_get_bits(tmp, 48, 4); 899} 900 901static int 902mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 903{ 904 struct mmc_command cmd; 905 int err; 906 907 cmd.opcode = MMC_ALL_SEND_CID; 908 cmd.arg = 0; 909 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 910 cmd.data = NULL; 911 err = mmc_wait_for_cmd(sc, &cmd, 0); 912 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 913 return (err); 914} 915 916static int 917mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 918{ 919 struct mmc_command cmd; 920 int err; 921 922 cmd.opcode = MMC_SEND_CSD; 923 cmd.arg = rca << 16; 924 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 925 cmd.data = NULL; 926 err = mmc_wait_for_cmd(sc, &cmd, 0); 927 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 928 return (err); 929} 930 931static int 932mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 933{ 934 int err; 935 struct mmc_command cmd; 936 struct mmc_data data; 937 938 memset(&cmd, 0, sizeof(struct mmc_command)); 939 memset(&data, 0, sizeof(struct mmc_data)); 940 941 memset(rawscr, 0, 8); 942 cmd.opcode = ACMD_SEND_SCR; 943 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 944 cmd.arg = 0; 945 cmd.data = &data; 946 947 data.data = rawscr; 948 data.len = 8; 949 data.flags = MMC_DATA_READ; 950 951 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 952 rawscr[0] = be32toh(rawscr[0]); 953 rawscr[1] = be32toh(rawscr[1]); 954 return (err); 955} 956 957static int 958mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 959{ 960 int err; 961 struct mmc_command cmd; 962 struct mmc_data data; 963 964 memset(&cmd, 0, sizeof(struct mmc_command)); 965 memset(&data, 0, sizeof(struct mmc_data)); 966 967 memset(rawextcsd, 0, 512); 968 cmd.opcode = MMC_SEND_EXT_CSD; 969 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 970 cmd.arg = 0; 971 cmd.data = &data; 972 973 data.data = rawextcsd; 974 data.len = 512; 975 data.flags = MMC_DATA_READ; 976 977 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 978 return (err); 979} 980 981static int 982mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 983{ 984 struct mmc_command cmd; 985 int err; 986 987 cmd.opcode = MMC_SET_RELATIVE_ADDR; 988 cmd.arg = resp << 16; 989 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 990 cmd.data = NULL; 991 err = mmc_wait_for_cmd(sc, &cmd, 0); 992 return (err); 993} 994 995static int 996mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 997{ 998 struct mmc_command cmd; 999 int err; 1000 1001 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1002 cmd.arg = 0; 1003 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1004 cmd.data = NULL; 1005 err = mmc_wait_for_cmd(sc, &cmd, 0); 1006 *resp = cmd.resp[0]; 1007 return (err); 1008} 1009 1010static void 1011mmc_discover_cards(struct mmc_softc *sc) 1012{ 1013 struct mmc_ivars *ivar; 1014 int err; 1015 uint32_t resp, sec_count; 1016 device_t child; 1017 uint16_t rca = 2; 1018 u_char switch_res[64]; 1019 1020 while (1) { 1021 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1022 M_WAITOK | M_ZERO); 1023 if (!ivar) 1024 return; 1025 err = mmc_all_send_cid(sc, ivar->raw_cid); 1026 if (err == MMC_ERR_TIMEOUT) 1027 break; 1028 if (err != MMC_ERR_NONE) { 1029 device_printf(sc->dev, "Error reading CID %d\n", err); 1030 break; 1031 } 1032 if (mmcbr_get_ro(sc->dev)) 1033 ivar->read_only = 1; 1034 ivar->bus_width = bus_width_1; 1035 ivar->mode = mmcbr_get_mode(sc->dev); 1036 if (ivar->mode == mode_sd) { 1037 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1038 mmc_send_relative_addr(sc, &resp); 1039 ivar->rca = resp >> 16; 1040 /* Get card CSD. */ 1041 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1042 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1043 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1044 if (ivar->csd.csd_structure > 0) 1045 ivar->high_cap = 1; 1046 ivar->tran_speed = ivar->csd.tran_speed; 1047 /* Get card SCR. Card must be selected to fetch it. */ 1048 mmc_select_card(sc, ivar->rca); 1049 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1050 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1051 /* Get card switch capabilities. */ 1052 if ((ivar->scr.sda_vsn >= 1) && 1053 (ivar->csd.ccc & (1<<10))) { 1054 mmc_sd_switch(sc, 0, 0, 0xF, switch_res); 1055 if (switch_res[13] & 2) { 1056 ivar->timing = bus_timing_hs; 1057 ivar->hs_tran_speed = 50000000; 1058 } 1059 } 1060 mmc_select_card(sc, 0); 1061 /* Find max supported bus width. */ 1062 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1063 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1064 ivar->bus_width = bus_width_4; 1065 /* Add device. */ 1066 child = device_add_child(sc->dev, NULL, -1); 1067 device_set_ivars(child, ivar); 1068 return; 1069 } 1070 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1071 ivar->rca = rca++; 1072 mmc_set_relative_addr(sc, ivar->rca); 1073 /* Get card CSD. */ 1074 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1075 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1076 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1077 ivar->tran_speed = ivar->csd.tran_speed; 1078 /* Only MMC >= 4.x cards support EXT_CSD. */ 1079 if (ivar->csd.spec_vers >= 4) { 1080 /* Card must be selected to fetch EXT_CSD. */ 1081 mmc_select_card(sc, ivar->rca); 1082 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1083 /* Handle extended capacity from EXT_CSD */ 1084 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1085 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1086 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1087 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1088 if (sec_count != 0) { 1089 ivar->sec_count = sec_count; 1090 ivar->high_cap = 1; 1091 } 1092 /* Get card speed in high speed mode. */ 1093 ivar->timing = bus_timing_hs; 1094 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1095 & EXT_CSD_CARD_TYPE_52) 1096 ivar->hs_tran_speed = 52000000; 1097 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1098 & EXT_CSD_CARD_TYPE_26) 1099 ivar->hs_tran_speed = 26000000; 1100 else 1101 ivar->hs_tran_speed = ivar->tran_speed; 1102 /* Find max supported bus width. */ 1103 ivar->bus_width = mmc_test_bus_width(sc); 1104 mmc_select_card(sc, 0); 1105 } else { 1106 ivar->bus_width = bus_width_1; 1107 ivar->timing = bus_timing_normal; 1108 } 1109 /* Add device. */ 1110 child = device_add_child(sc->dev, NULL, -1); 1111 device_set_ivars(child, ivar); 1112 } 1113 free(ivar, M_DEVBUF); 1114} 1115 1116static void 1117mmc_go_discovery(struct mmc_softc *sc) 1118{ 1119 uint32_t ocr; 1120 device_t dev; 1121 int err; 1122 1123 dev = sc->dev; 1124 if (mmcbr_get_power_mode(dev) != power_on) { 1125 /* 1126 * First, try SD modes 1127 */ 1128 mmcbr_set_mode(dev, mode_sd); 1129 mmc_power_up(sc); 1130 mmcbr_set_bus_mode(dev, pushpull); 1131 mmc_idle_cards(sc); 1132 err = mmc_send_if_cond(sc, 1); 1133 if (mmc_send_app_op_cond(sc, err?0:MMC_OCR_CCS, &ocr) != 1134 MMC_ERR_NONE) { 1135 /* 1136 * Failed, try MMC 1137 */ 1138 mmcbr_set_mode(dev, mode_mmc); 1139 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) 1140 return; /* Failed both, punt! XXX powerdown? */ 1141 } 1142 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1143 if (mmcbr_get_ocr(dev) != 0) 1144 mmc_idle_cards(sc); 1145 } else { 1146 mmcbr_set_bus_mode(dev, opendrain); 1147 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1148 mmcbr_update_ios(dev); 1149 /* XXX recompute vdd based on new cards? */ 1150 } 1151 /* 1152 * Make sure that we have a mutually agreeable voltage to at least 1153 * one card on the bus. 1154 */ 1155 if (mmcbr_get_ocr(dev) == 0) 1156 return; 1157 /* 1158 * Reselect the cards after we've idled them above. 1159 */ 1160 if (mmcbr_get_mode(dev) == mode_sd) { 1161 err = mmc_send_if_cond(sc, 1); 1162 mmc_send_app_op_cond(sc, 1163 (err?0:MMC_OCR_CCS)|mmcbr_get_ocr(dev), NULL); 1164 } else 1165 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1166 mmc_discover_cards(sc); 1167 1168 mmcbr_set_bus_mode(dev, pushpull); 1169 mmcbr_update_ios(dev); 1170 bus_generic_attach(dev); 1171/* mmc_update_children_sysctl(dev);*/ 1172} 1173 1174static int 1175mmc_calculate_clock(struct mmc_softc *sc) 1176{ 1177 int max_dtr, max_hs_dtr, max_timing; 1178 int nkid, i, f_min, f_max; 1179 device_t *kids; 1180 struct mmc_ivars *ivar; 1181 1182 f_min = mmcbr_get_f_min(sc->dev); 1183 f_max = mmcbr_get_f_max(sc->dev); 1184 max_dtr = max_hs_dtr = f_max; 1185 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1186 max_timing = bus_timing_hs; 1187 else 1188 max_timing = bus_timing_normal; 1189 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1190 panic("can't get children"); 1191 for (i = 0; i < nkid; i++) { 1192 ivar = device_get_ivars(kids[i]); 1193 if (ivar->timing < max_timing) 1194 max_timing = ivar->timing; 1195 if (ivar->tran_speed < max_dtr) 1196 max_dtr = ivar->tran_speed; 1197 if (ivar->hs_tran_speed < max_dtr) 1198 max_hs_dtr = ivar->hs_tran_speed; 1199 } 1200 for (i = 0; i < nkid; i++) { 1201 ivar = device_get_ivars(kids[i]); 1202 if (ivar->timing == bus_timing_normal) 1203 continue; 1204 mmc_select_card(sc, ivar->rca); 1205 mmc_set_timing(sc, max_timing); 1206 } 1207 mmc_select_card(sc, 0); 1208 free(kids, M_TEMP); 1209 if (max_timing == bus_timing_hs) 1210 max_dtr = max_hs_dtr; 1211 device_printf(sc->dev, "setting transfer rate to %d.%03dMHz%s\n", 1212 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1213 (max_timing == bus_timing_hs)?" with high speed timing":""); 1214 mmcbr_set_timing(sc->dev, max_timing); 1215 mmcbr_set_clock(sc->dev, max_dtr); 1216 mmcbr_update_ios(sc->dev); 1217 return max_dtr; 1218} 1219 1220static void 1221mmc_scan(struct mmc_softc *sc) 1222{ 1223 device_t dev; 1224 1225 dev = sc->dev; 1226 mmc_acquire_bus(dev, dev); 1227 1228 if (mmcbr_get_power_mode(dev) == power_on) 1229 mmc_rescan_cards(sc); 1230 mmc_go_discovery(sc); 1231 mmc_calculate_clock(sc); 1232 1233 mmc_release_bus(dev, dev); 1234 /* XXX probe/attach/detach children? */ 1235} 1236 1237static int 1238mmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 1239{ 1240 struct mmc_ivars *ivar = device_get_ivars(child); 1241 1242 switch (which) { 1243 default: 1244 return (EINVAL); 1245 case MMC_IVAR_DSR_IMP: 1246 *(int *)result = ivar->csd.dsr_imp; 1247 break; 1248 case MMC_IVAR_MEDIA_SIZE: 1249 *(off_t *)result = ivar->sec_count; 1250 break; 1251 case MMC_IVAR_RCA: 1252 *(int *)result = ivar->rca; 1253 break; 1254 case MMC_IVAR_SECTOR_SIZE: 1255 *(int *)result = MMC_SECTOR_SIZE; 1256 break; 1257 case MMC_IVAR_TRAN_SPEED: 1258 *(int *)result = ivar->csd.tran_speed; 1259 break; 1260 case MMC_IVAR_READ_ONLY: 1261 *(int *)result = ivar->read_only; 1262 break; 1263 case MMC_IVAR_HIGH_CAP: 1264 *(int *)result = ivar->high_cap; 1265 break; 1266 } 1267 return (0); 1268} 1269 1270static int 1271mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1272{ 1273 /* 1274 * None are writable ATM 1275 */ 1276 return (EINVAL); 1277} 1278 1279 1280static void 1281mmc_delayed_attach(void *xsc) 1282{ 1283 struct mmc_softc *sc = xsc; 1284 1285 mmc_scan(sc); 1286 config_intrhook_disestablish(&sc->config_intrhook); 1287} 1288 1289static device_method_t mmc_methods[] = { 1290 /* device_if */ 1291 DEVMETHOD(device_probe, mmc_probe), 1292 DEVMETHOD(device_attach, mmc_attach), 1293 DEVMETHOD(device_detach, mmc_detach), 1294 1295 /* Bus interface */ 1296 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1297 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1298 1299 /* MMC Bus interface */ 1300 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1301 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1302 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1303 1304 {0, 0}, 1305}; 1306 1307static driver_t mmc_driver = { 1308 "mmc", 1309 mmc_methods, 1310 sizeof(struct mmc_softc), 1311}; 1312static devclass_t mmc_devclass; 1313 1314 1315DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 1316DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, 0, 0); 1317