Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/mmc/mmc.c
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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("$FreeBSD$"); 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 73 struct 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 */ 84 struct 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 3 108 109 static SYSCTL_NODE(_hw, OID_AUTO, mmc, CTLFLAG_RD, NULL, "mmc driver"); 110 111 static int mmc_debug; 112 SYSCTL_INT(_hw_mmc, OID_AUTO, debug, CTLFLAG_RW, &mmc_debug, 0, "Debug level"); 113 114 /* bus entry points */ 115 static int mmc_acquire_bus(device_t busdev, device_t dev); 116 static int mmc_attach(device_t dev); 117 static int mmc_child_location_str(device_t dev, device_t child, char *buf, 118 size_t buflen); 119 static int mmc_detach(device_t dev); 120 static int mmc_probe(device_t dev); 121 static int mmc_read_ivar(device_t bus, device_t child, int which, 122 uintptr_t *result); 123 static int mmc_release_bus(device_t busdev, device_t dev); 124 static int mmc_resume(device_t dev); 125 static int mmc_suspend(device_t dev); 126 static int mmc_wait_for_request(device_t brdev, device_t reqdev, 127 struct mmc_request *req); 128 static int mmc_write_ivar(device_t bus, device_t child, int which, 129 uintptr_t value); 130 131 #define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 132 #define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 133 #define MMC_LOCK_INIT(_sc) \ 134 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 135 "mmc", MTX_DEF) 136 #define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 137 #define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 138 #define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 139 140 static int mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid); 141 static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr); 142 static void mmc_app_decode_sd_status(uint32_t *raw_sd_status, 143 struct mmc_sd_status *sd_status); 144 static int mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, 145 uint32_t *rawsdstatus); 146 static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, 147 uint32_t *rawscr); 148 static int mmc_calculate_clock(struct mmc_softc *sc); 149 static void mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid); 150 static void mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid); 151 static void mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd); 152 static void mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd); 153 static void mmc_delayed_attach(void *xsc); 154 static int mmc_delete_cards(struct mmc_softc *sc); 155 static void mmc_discover_cards(struct mmc_softc *sc); 156 static void mmc_format_card_id_string(struct mmc_ivars *ivar); 157 static void mmc_go_discovery(struct mmc_softc *sc); 158 static uint32_t mmc_get_bits(uint32_t *bits, int bit_len, int start, 159 int size); 160 static int mmc_highest_voltage(uint32_t ocr); 161 static void mmc_idle_cards(struct mmc_softc *sc); 162 static void mmc_ms_delay(int ms); 163 static void mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard); 164 static void mmc_power_down(struct mmc_softc *sc); 165 static void mmc_power_up(struct mmc_softc *sc); 166 static void mmc_rescan_cards(struct mmc_softc *sc); 167 static void mmc_scan(struct mmc_softc *sc); 168 static int mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, 169 uint8_t value, uint8_t *res); 170 static int mmc_select_card(struct mmc_softc *sc, uint16_t rca); 171 static uint32_t mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr); 172 static int mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, 173 uint32_t *rocr); 174 static int mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcsd); 175 static int mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd); 176 static int mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs); 177 static int mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, 178 uint32_t *rocr); 179 static int mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp); 180 static int mmc_send_status(struct mmc_softc *sc, uint16_t rca, 181 uint32_t *status); 182 static int mmc_set_blocklen(struct mmc_softc *sc, uint32_t len); 183 static int mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, 184 int width); 185 static int mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp); 186 static int mmc_set_timing(struct mmc_softc *sc, int timing); 187 static int mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, 188 uint8_t value); 189 static int mmc_test_bus_width(struct mmc_softc *sc); 190 static int mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 191 struct mmc_command *cmd, int retries); 192 static int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 193 int retries); 194 static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 195 uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 196 static int mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req); 197 static void mmc_wakeup(struct mmc_request *req); 198 199 static void 200 mmc_ms_delay(int ms) 201 { 202 203 DELAY(1000 * ms); /* XXX BAD */ 204 } 205 206 static int 207 mmc_probe(device_t dev) 208 { 209 210 device_set_desc(dev, "MMC/SD bus"); 211 return (0); 212 } 213 214 static int 215 mmc_attach(device_t dev) 216 { 217 struct mmc_softc *sc; 218 219 sc = device_get_softc(dev); 220 sc->dev = dev; 221 MMC_LOCK_INIT(sc); 222 223 /* We'll probe and attach our children later, but before / mount */ 224 sc->config_intrhook.ich_func = mmc_delayed_attach; 225 sc->config_intrhook.ich_arg = sc; 226 if (config_intrhook_establish(&sc->config_intrhook) != 0) 227 device_printf(dev, "config_intrhook_establish failed\n"); 228 return (0); 229 } 230 231 static int 232 mmc_detach(device_t dev) 233 { 234 struct mmc_softc *sc = device_get_softc(dev); 235 int err; 236 237 if ((err = mmc_delete_cards(sc)) != 0) 238 return (err); 239 mmc_power_down(sc); 240 MMC_LOCK_DESTROY(sc); 241 242 return (0); 243 } 244 245 static int 246 mmc_suspend(device_t dev) 247 { 248 struct mmc_softc *sc = device_get_softc(dev); 249 int err; 250 251 err = bus_generic_suspend(dev); 252 if (err) 253 return (err); 254 mmc_power_down(sc); 255 return (0); 256 } 257 258 static int 259 mmc_resume(device_t dev) 260 { 261 struct mmc_softc *sc = device_get_softc(dev); 262 263 mmc_scan(sc); 264 return (bus_generic_resume(dev)); 265 } 266 267 static int 268 mmc_acquire_bus(device_t busdev, device_t dev) 269 { 270 struct mmc_softc *sc; 271 struct mmc_ivars *ivar; 272 int err; 273 int rca; 274 275 err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev); 276 if (err) 277 return (err); 278 sc = device_get_softc(busdev); 279 MMC_LOCK(sc); 280 if (sc->owner) 281 panic("mmc: host bridge didn't serialize us."); 282 sc->owner = dev; 283 MMC_UNLOCK(sc); 284 285 if (busdev != dev) { 286 /* 287 * Keep track of the last rca that we've selected. If 288 * we're asked to do it again, don't. We never 289 * unselect unless the bus code itself wants the mmc 290 * bus, and constantly reselecting causes problems. 291 */ 292 rca = mmc_get_rca(dev); 293 if (sc->last_rca != rca) { 294 mmc_select_card(sc, rca); 295 sc->last_rca = rca; 296 /* Prepare bus width for the new card. */ 297 ivar = device_get_ivars(dev); 298 if (bootverbose || mmc_debug) { 299 device_printf(busdev, 300 "setting bus width to %d bits\n", 301 (ivar->bus_width == bus_width_4) ? 4 : 302 (ivar->bus_width == bus_width_8) ? 8 : 1); 303 } 304 mmc_set_card_bus_width(sc, rca, ivar->bus_width); 305 mmcbr_set_bus_width(busdev, ivar->bus_width); 306 mmcbr_update_ios(busdev); 307 } 308 } else { 309 /* 310 * If there's a card selected, stand down. 311 */ 312 if (sc->last_rca != 0) { 313 mmc_select_card(sc, 0); 314 sc->last_rca = 0; 315 } 316 } 317 318 return (0); 319 } 320 321 static int 322 mmc_release_bus(device_t busdev, device_t dev) 323 { 324 struct mmc_softc *sc; 325 int err; 326 327 sc = device_get_softc(busdev); 328 329 MMC_LOCK(sc); 330 if (!sc->owner) 331 panic("mmc: releasing unowned bus."); 332 if (sc->owner != dev) 333 panic("mmc: you don't own the bus. game over."); 334 MMC_UNLOCK(sc); 335 err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev); 336 if (err) 337 return (err); 338 MMC_LOCK(sc); 339 sc->owner = NULL; 340 MMC_UNLOCK(sc); 341 return (0); 342 } 343 344 static uint32_t 345 mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 346 { 347 348 return (ocr & MMC_OCR_VOLTAGE); 349 } 350 351 static int 352 mmc_highest_voltage(uint32_t ocr) 353 { 354 int i; 355 356 for (i = 30; i >= 0; i--) 357 if (ocr & (1 << i)) 358 return (i); 359 return (-1); 360 } 361 362 static void 363 mmc_wakeup(struct mmc_request *req) 364 { 365 struct mmc_softc *sc; 366 367 sc = (struct mmc_softc *)req->done_data; 368 MMC_LOCK(sc); 369 req->flags |= MMC_REQ_DONE; 370 MMC_UNLOCK(sc); 371 wakeup(req); 372 } 373 374 static int 375 mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 376 { 377 378 req->done = mmc_wakeup; 379 req->done_data = sc; 380 if (mmc_debug > 1) { 381 device_printf(sc->dev, "REQUEST: CMD%d arg %#x flags %#x", 382 req->cmd->opcode, req->cmd->arg, req->cmd->flags); 383 if (req->cmd->data) { 384 printf(" data %d\n", (int)req->cmd->data->len); 385 } else 386 printf("\n"); 387 } 388 MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 389 MMC_LOCK(sc); 390 while ((req->flags & MMC_REQ_DONE) == 0) 391 msleep(req, &sc->sc_mtx, 0, "mmcreq", 0); 392 MMC_UNLOCK(sc); 393 if (mmc_debug > 2 || (mmc_debug > 1 && req->cmd->error)) 394 device_printf(sc->dev, "RESULT: %d\n", req->cmd->error); 395 return (0); 396 } 397 398 static int 399 mmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 400 { 401 struct mmc_softc *sc = device_get_softc(brdev); 402 403 return (mmc_wait_for_req(sc, req)); 404 } 405 406 static int 407 mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 408 { 409 struct mmc_request mreq; 410 411 memset(&mreq, 0, sizeof(mreq)); 412 memset(cmd->resp, 0, sizeof(cmd->resp)); 413 cmd->retries = retries; 414 mreq.cmd = cmd; 415 mmc_wait_for_req(sc, &mreq); 416 return (cmd->error); 417 } 418 419 static int 420 mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 421 struct mmc_command *cmd, int retries) 422 { 423 struct mmc_command appcmd; 424 int err = MMC_ERR_NONE, i; 425 426 for (i = 0; i <= retries; i++) { 427 appcmd.opcode = MMC_APP_CMD; 428 appcmd.arg = rca << 16; 429 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 430 appcmd.data = NULL; 431 mmc_wait_for_cmd(sc, &appcmd, 0); 432 err = appcmd.error; 433 if (err != MMC_ERR_NONE) 434 continue; 435 if (!(appcmd.resp[0] & R1_APP_CMD)) 436 return MMC_ERR_FAILED; 437 mmc_wait_for_cmd(sc, cmd, 0); 438 err = cmd->error; 439 if (err == MMC_ERR_NONE) 440 break; 441 } 442 return (err); 443 } 444 445 static int 446 mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 447 uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 448 { 449 struct mmc_command cmd; 450 int err; 451 452 memset(&cmd, 0, sizeof(cmd)); 453 cmd.opcode = opcode; 454 cmd.arg = arg; 455 cmd.flags = flags; 456 cmd.data = NULL; 457 err = mmc_wait_for_cmd(sc, &cmd, retries); 458 if (err) 459 return (err); 460 if (cmd.error) 461 return (cmd.error); 462 if (resp) { 463 if (flags & MMC_RSP_136) 464 memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 465 else 466 *resp = cmd.resp[0]; 467 } 468 return (0); 469 } 470 471 static void 472 mmc_idle_cards(struct mmc_softc *sc) 473 { 474 device_t dev; 475 struct mmc_command cmd; 476 477 dev = sc->dev; 478 mmcbr_set_chip_select(dev, cs_high); 479 mmcbr_update_ios(dev); 480 mmc_ms_delay(1); 481 482 memset(&cmd, 0, sizeof(cmd)); 483 cmd.opcode = MMC_GO_IDLE_STATE; 484 cmd.arg = 0; 485 cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 486 cmd.data = NULL; 487 mmc_wait_for_cmd(sc, &cmd, 0); 488 mmc_ms_delay(1); 489 490 mmcbr_set_chip_select(dev, cs_dontcare); 491 mmcbr_update_ios(dev); 492 mmc_ms_delay(1); 493 } 494 495 static int 496 mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 497 { 498 struct mmc_command cmd; 499 int err = MMC_ERR_NONE, i; 500 501 memset(&cmd, 0, sizeof(cmd)); 502 cmd.opcode = ACMD_SD_SEND_OP_COND; 503 cmd.arg = ocr; 504 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 505 cmd.data = NULL; 506 507 for (i = 0; i < 1000; i++) { 508 err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 509 if (err != MMC_ERR_NONE) 510 break; 511 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 512 (ocr & MMC_OCR_VOLTAGE) == 0) 513 break; 514 err = MMC_ERR_TIMEOUT; 515 mmc_ms_delay(10); 516 } 517 if (rocr && err == MMC_ERR_NONE) 518 *rocr = cmd.resp[0]; 519 return (err); 520 } 521 522 static int 523 mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 524 { 525 struct mmc_command cmd; 526 int err = MMC_ERR_NONE, i; 527 528 memset(&cmd, 0, sizeof(cmd)); 529 cmd.opcode = MMC_SEND_OP_COND; 530 cmd.arg = ocr; 531 cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 532 cmd.data = NULL; 533 534 for (i = 0; i < 1000; i++) { 535 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 536 if (err != MMC_ERR_NONE) 537 break; 538 if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || 539 (ocr & MMC_OCR_VOLTAGE) == 0) 540 break; 541 err = MMC_ERR_TIMEOUT; 542 mmc_ms_delay(10); 543 } 544 if (rocr && err == MMC_ERR_NONE) 545 *rocr = cmd.resp[0]; 546 return (err); 547 } 548 549 static int 550 mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs) 551 { 552 struct mmc_command cmd; 553 int err; 554 555 memset(&cmd, 0, sizeof(cmd)); 556 cmd.opcode = SD_SEND_IF_COND; 557 cmd.arg = (vhs << 8) + 0xAA; 558 cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; 559 cmd.data = NULL; 560 561 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 562 return (err); 563 } 564 565 static void 566 mmc_power_up(struct mmc_softc *sc) 567 { 568 device_t dev; 569 570 dev = sc->dev; 571 mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 572 mmcbr_set_bus_mode(dev, opendrain); 573 mmcbr_set_chip_select(dev, cs_dontcare); 574 mmcbr_set_bus_width(dev, bus_width_1); 575 mmcbr_set_power_mode(dev, power_up); 576 mmcbr_set_clock(dev, 0); 577 mmcbr_update_ios(dev); 578 mmc_ms_delay(1); 579 580 mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 581 mmcbr_set_timing(dev, bus_timing_normal); 582 mmcbr_set_power_mode(dev, power_on); 583 mmcbr_update_ios(dev); 584 mmc_ms_delay(2); 585 } 586 587 static void 588 mmc_power_down(struct mmc_softc *sc) 589 { 590 device_t dev = sc->dev; 591 592 mmcbr_set_bus_mode(dev, opendrain); 593 mmcbr_set_chip_select(dev, cs_dontcare); 594 mmcbr_set_bus_width(dev, bus_width_1); 595 mmcbr_set_power_mode(dev, power_off); 596 mmcbr_set_clock(dev, 0); 597 mmcbr_set_timing(dev, bus_timing_normal); 598 mmcbr_update_ios(dev); 599 } 600 601 static int 602 mmc_select_card(struct mmc_softc *sc, uint16_t rca) 603 { 604 int flags; 605 606 flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; 607 return (mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16, 608 flags, NULL, CMD_RETRIES)); 609 } 610 611 static int 612 mmc_switch(struct mmc_softc *sc, uint8_t set, uint8_t index, uint8_t value) 613 { 614 struct mmc_command cmd; 615 int err; 616 617 cmd.opcode = MMC_SWITCH_FUNC; 618 cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | 619 (index << 16) | 620 (value << 8) | 621 set; 622 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 623 cmd.data = NULL; 624 err = mmc_wait_for_cmd(sc, &cmd, 0); 625 return (err); 626 } 627 628 static int 629 mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value, 630 uint8_t *res) 631 { 632 int err; 633 struct mmc_command cmd; 634 struct mmc_data data; 635 636 memset(&cmd, 0, sizeof(struct mmc_command)); 637 memset(&data, 0, sizeof(struct mmc_data)); 638 memset(res, 0, 64); 639 640 cmd.opcode = SD_SWITCH_FUNC; 641 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 642 cmd.arg = mode << 31; /* 0 - check, 1 - set */ 643 cmd.arg |= 0x00FFFFFF; 644 cmd.arg &= ~(0xF << (grp * 4)); 645 cmd.arg |= value << (grp * 4); 646 cmd.data = &data; 647 648 data.data = res; 649 data.len = 64; 650 data.flags = MMC_DATA_READ; 651 652 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 653 return (err); 654 } 655 656 static int 657 mmc_set_card_bus_width(struct mmc_softc *sc, uint16_t rca, int width) 658 { 659 struct mmc_command cmd; 660 int err; 661 uint8_t value; 662 663 if (mmcbr_get_mode(sc->dev) == mode_sd) { 664 memset(&cmd, 0, sizeof(struct mmc_command)); 665 cmd.opcode = ACMD_SET_CLR_CARD_DETECT; 666 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 667 cmd.arg = SD_CLR_CARD_DETECT; 668 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 669 if (err != 0) 670 return (err); 671 memset(&cmd, 0, sizeof(struct mmc_command)); 672 cmd.opcode = ACMD_SET_BUS_WIDTH; 673 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 674 switch (width) { 675 case bus_width_1: 676 cmd.arg = SD_BUS_WIDTH_1; 677 break; 678 case bus_width_4: 679 cmd.arg = SD_BUS_WIDTH_4; 680 break; 681 default: 682 return (MMC_ERR_INVALID); 683 } 684 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 685 } else { 686 switch (width) { 687 case bus_width_1: 688 value = EXT_CSD_BUS_WIDTH_1; 689 break; 690 case bus_width_4: 691 value = EXT_CSD_BUS_WIDTH_4; 692 break; 693 case bus_width_8: 694 value = EXT_CSD_BUS_WIDTH_8; 695 break; 696 default: 697 return (MMC_ERR_INVALID); 698 } 699 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 700 value); 701 } 702 return (err); 703 } 704 705 static int 706 mmc_set_timing(struct mmc_softc *sc, int timing) 707 { 708 int err; 709 uint8_t value; 710 u_char switch_res[64]; 711 712 switch (timing) { 713 case bus_timing_normal: 714 value = 0; 715 break; 716 case bus_timing_hs: 717 value = 1; 718 break; 719 default: 720 return (MMC_ERR_INVALID); 721 } 722 if (mmcbr_get_mode(sc->dev) == mode_sd) 723 err = mmc_sd_switch(sc, SD_SWITCH_MODE_SET, SD_SWITCH_GROUP1, 724 value, switch_res); 725 else 726 err = mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 727 EXT_CSD_HS_TIMING, value); 728 return (err); 729 } 730 731 static int 732 mmc_test_bus_width(struct mmc_softc *sc) 733 { 734 struct mmc_command cmd; 735 struct mmc_data data; 736 int err; 737 uint8_t buf[8]; 738 uint8_t p8[8] = { 0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 739 uint8_t p8ok[8] = { 0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 740 uint8_t p4[4] = { 0x5A, 0x00, 0x00, 0x00, }; 741 uint8_t p4ok[4] = { 0xA5, 0x00, 0x00, 0x00, }; 742 743 if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) { 744 mmcbr_set_bus_width(sc->dev, bus_width_8); 745 mmcbr_update_ios(sc->dev); 746 747 cmd.opcode = MMC_BUSTEST_W; 748 cmd.arg = 0; 749 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 750 cmd.data = &data; 751 752 data.data = p8; 753 data.len = 8; 754 data.flags = MMC_DATA_WRITE; 755 mmc_wait_for_cmd(sc, &cmd, 0); 756 757 cmd.opcode = MMC_BUSTEST_R; 758 cmd.arg = 0; 759 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 760 cmd.data = &data; 761 762 data.data = buf; 763 data.len = 8; 764 data.flags = MMC_DATA_READ; 765 err = mmc_wait_for_cmd(sc, &cmd, 0); 766 767 mmcbr_set_bus_width(sc->dev, bus_width_1); 768 mmcbr_update_ios(sc->dev); 769 770 if (err == MMC_ERR_NONE && memcmp(buf, p8ok, 8) == 0) 771 return (bus_width_8); 772 } 773 774 if (mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) { 775 mmcbr_set_bus_width(sc->dev, bus_width_4); 776 mmcbr_update_ios(sc->dev); 777 778 cmd.opcode = MMC_BUSTEST_W; 779 cmd.arg = 0; 780 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 781 cmd.data = &data; 782 783 data.data = p4; 784 data.len = 4; 785 data.flags = MMC_DATA_WRITE; 786 mmc_wait_for_cmd(sc, &cmd, 0); 787 788 cmd.opcode = MMC_BUSTEST_R; 789 cmd.arg = 0; 790 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 791 cmd.data = &data; 792 793 data.data = buf; 794 data.len = 4; 795 data.flags = MMC_DATA_READ; 796 err = mmc_wait_for_cmd(sc, &cmd, 0); 797 798 mmcbr_set_bus_width(sc->dev, bus_width_1); 799 mmcbr_update_ios(sc->dev); 800 801 if (err == MMC_ERR_NONE && memcmp(buf, p4ok, 4) == 0) 802 return (bus_width_4); 803 } 804 return (bus_width_1); 805 } 806 807 static uint32_t 808 mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) 809 { 810 const int i = (bit_len / 32) - (start / 32) - 1; 811 const int shift = start & 31; 812 uint32_t retval = bits[i] >> shift; 813 if (size + shift > 32) 814 retval |= bits[i - 1] << (32 - shift); 815 return (retval & ((1llu << size) - 1)); 816 } 817 818 static void 819 mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) 820 { 821 int i; 822 823 /* There's no version info, so we take it on faith */ 824 memset(cid, 0, sizeof(*cid)); 825 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 826 cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); 827 for (i = 0; i < 5; i++) 828 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 829 cid->pnm[5] = 0; 830 cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); 831 cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); 832 cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2000; 833 cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); 834 } 835 836 static void 837 mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) 838 { 839 int i; 840 841 /* There's no version info, so we take it on faith */ 842 memset(cid, 0, sizeof(*cid)); 843 cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); 844 cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); 845 for (i = 0; i < 6; i++) 846 cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); 847 cid->pnm[6] = 0; 848 cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); 849 cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); 850 cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); 851 cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; 852 } 853 854 static void 855 mmc_format_card_id_string(struct mmc_ivars *ivar) 856 { 857 char oidstr[8]; 858 uint8_t c1; 859 uint8_t c2; 860 861 /* 862 * Format a card ID string for use by the mmcsd driver, it's what 863 * appears between the <> in the following: 864 * mmcsd0: 968MB <SD SD01G 8.0 SN 2686905 Mfg 08/2008 by 3 TN> at mmc0 865 * 22.5MHz/4bit/128-block 866 * 867 * The card_id_string in mmc_ivars is currently allocated as 64 bytes, 868 * and our max formatted length is currently 55 bytes if every field 869 * contains the largest value. 870 * 871 * Sometimes the oid is two printable ascii chars; when it's not, 872 * format it as 0xnnnn instead. 873 */ 874 c1 = (ivar->cid.oid >> 8) & 0x0ff; 875 c2 = ivar->cid.oid & 0x0ff; 876 if (c1 > 0x1f && c1 < 0x7f && c2 > 0x1f && c2 < 0x7f) 877 snprintf(oidstr, sizeof(oidstr), "%c%c", c1, c2); 878 else 879 snprintf(oidstr, sizeof(oidstr), "0x%04x", ivar->cid.oid); 880 snprintf(ivar->card_id_string, sizeof(ivar->card_id_string), 881 "%s%s %s %d.%d SN %u MFG %02d/%04d by %d %s", 882 ivar->mode == mode_sd ? "SD" : "MMC", ivar->high_cap ? "HC" : "", 883 ivar->cid.pnm, ivar->cid.prv >> 4, ivar->cid.prv & 0x0f, 884 ivar->cid.psn, ivar->cid.mdt_month, ivar->cid.mdt_year, 885 ivar->cid.mid, oidstr); 886 } 887 888 static const int exp[8] = { 889 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 890 }; 891 892 static const int mant[16] = { 893 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 894 }; 895 896 static const int cur_min[8] = { 897 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 898 }; 899 900 static const int cur_max[8] = { 901 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 902 }; 903 904 static void 905 mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) 906 { 907 int v; 908 int m; 909 int e; 910 911 memset(csd, 0, sizeof(*csd)); 912 csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); 913 if (v == 0) { 914 m = mmc_get_bits(raw_csd, 128, 115, 4); 915 e = mmc_get_bits(raw_csd, 128, 112, 3); 916 csd->tacc = (exp[e] * mant[m] + 9) / 10; 917 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 918 m = mmc_get_bits(raw_csd, 128, 99, 4); 919 e = mmc_get_bits(raw_csd, 128, 96, 3); 920 csd->tran_speed = exp[e] * 10000 * mant[m]; 921 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 922 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 923 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 924 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 925 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 926 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 927 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 928 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 929 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 930 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 931 m = mmc_get_bits(raw_csd, 128, 62, 12); 932 e = mmc_get_bits(raw_csd, 128, 47, 3); 933 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 934 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 935 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 936 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 937 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 938 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 939 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 940 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 941 } else if (v == 1) { 942 m = mmc_get_bits(raw_csd, 128, 115, 4); 943 e = mmc_get_bits(raw_csd, 128, 112, 3); 944 csd->tacc = (exp[e] * mant[m] + 9) / 10; 945 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 946 m = mmc_get_bits(raw_csd, 128, 99, 4); 947 e = mmc_get_bits(raw_csd, 128, 96, 3); 948 csd->tran_speed = exp[e] * 10000 * mant[m]; 949 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 950 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 951 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 952 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 953 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 954 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 955 csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 956 512 * 1024; 957 csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); 958 csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; 959 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); 960 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 961 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 962 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 963 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 964 } else 965 panic("unknown SD CSD version"); 966 } 967 968 static void 969 mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) 970 { 971 int m; 972 int e; 973 974 memset(csd, 0, sizeof(*csd)); 975 csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); 976 csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); 977 m = mmc_get_bits(raw_csd, 128, 115, 4); 978 e = mmc_get_bits(raw_csd, 128, 112, 3); 979 csd->tacc = exp[e] * mant[m] + 9 / 10; 980 csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; 981 m = mmc_get_bits(raw_csd, 128, 99, 4); 982 e = mmc_get_bits(raw_csd, 128, 96, 3); 983 csd->tran_speed = exp[e] * 10000 * mant[m]; 984 csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); 985 csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); 986 csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); 987 csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); 988 csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); 989 csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); 990 csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; 991 csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; 992 csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; 993 csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; 994 m = mmc_get_bits(raw_csd, 128, 62, 12); 995 e = mmc_get_bits(raw_csd, 128, 47, 3); 996 csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 997 csd->erase_blk_en = 0; 998 csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * 999 (mmc_get_bits(raw_csd, 128, 37, 5) + 1); 1000 csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); 1001 csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); 1002 csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); 1003 csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); 1004 csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); 1005 } 1006 1007 static void 1008 mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) 1009 { 1010 unsigned int scr_struct; 1011 1012 memset(scr, 0, sizeof(*scr)); 1013 1014 scr_struct = mmc_get_bits(raw_scr, 64, 60, 4); 1015 if (scr_struct != 0) { 1016 printf("Unrecognised SCR structure version %d\n", 1017 scr_struct); 1018 return; 1019 } 1020 scr->sda_vsn = mmc_get_bits(raw_scr, 64, 56, 4); 1021 scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); 1022 } 1023 1024 static void 1025 mmc_app_decode_sd_status(uint32_t *raw_sd_status, 1026 struct mmc_sd_status *sd_status) 1027 { 1028 1029 memset(sd_status, 0, sizeof(*sd_status)); 1030 1031 sd_status->bus_width = mmc_get_bits(raw_sd_status, 512, 510, 2); 1032 sd_status->secured_mode = mmc_get_bits(raw_sd_status, 512, 509, 1); 1033 sd_status->card_type = mmc_get_bits(raw_sd_status, 512, 480, 16); 1034 sd_status->prot_area = mmc_get_bits(raw_sd_status, 512, 448, 12); 1035 sd_status->speed_class = mmc_get_bits(raw_sd_status, 512, 440, 8); 1036 sd_status->perf_move = mmc_get_bits(raw_sd_status, 512, 432, 8); 1037 sd_status->au_size = mmc_get_bits(raw_sd_status, 512, 428, 4); 1038 sd_status->erase_size = mmc_get_bits(raw_sd_status, 512, 408, 16); 1039 sd_status->erase_timeout = mmc_get_bits(raw_sd_status, 512, 402, 6); 1040 sd_status->erase_offset = mmc_get_bits(raw_sd_status, 512, 400, 2); 1041 } 1042 1043 static int 1044 mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 1045 { 1046 struct mmc_command cmd; 1047 int err; 1048 1049 cmd.opcode = MMC_ALL_SEND_CID; 1050 cmd.arg = 0; 1051 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 1052 cmd.data = NULL; 1053 err = mmc_wait_for_cmd(sc, &cmd, 0); 1054 memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 1055 return (err); 1056 } 1057 1058 static int 1059 mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcsd) 1060 { 1061 struct mmc_command cmd; 1062 int err; 1063 1064 cmd.opcode = MMC_SEND_CSD; 1065 cmd.arg = rca << 16; 1066 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 1067 cmd.data = NULL; 1068 err = mmc_wait_for_cmd(sc, &cmd, 0); 1069 memcpy(rawcsd, cmd.resp, 4 * sizeof(uint32_t)); 1070 return (err); 1071 } 1072 1073 static int 1074 mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca, uint32_t *rawscr) 1075 { 1076 int err; 1077 struct mmc_command cmd; 1078 struct mmc_data data; 1079 1080 memset(&cmd, 0, sizeof(struct mmc_command)); 1081 memset(&data, 0, sizeof(struct mmc_data)); 1082 1083 memset(rawscr, 0, 8); 1084 cmd.opcode = ACMD_SEND_SCR; 1085 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1086 cmd.arg = 0; 1087 cmd.data = &data; 1088 1089 data.data = rawscr; 1090 data.len = 8; 1091 data.flags = MMC_DATA_READ; 1092 1093 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1094 rawscr[0] = be32toh(rawscr[0]); 1095 rawscr[1] = be32toh(rawscr[1]); 1096 return (err); 1097 } 1098 1099 static int 1100 mmc_send_ext_csd(struct mmc_softc *sc, uint8_t *rawextcsd) 1101 { 1102 int err; 1103 struct mmc_command cmd; 1104 struct mmc_data data; 1105 1106 memset(&cmd, 0, sizeof(struct mmc_command)); 1107 memset(&data, 0, sizeof(struct mmc_data)); 1108 1109 memset(rawextcsd, 0, 512); 1110 cmd.opcode = MMC_SEND_EXT_CSD; 1111 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1112 cmd.arg = 0; 1113 cmd.data = &data; 1114 1115 data.data = rawextcsd; 1116 data.len = 512; 1117 data.flags = MMC_DATA_READ; 1118 1119 err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 1120 return (err); 1121 } 1122 1123 static int 1124 mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca, uint32_t *rawsdstatus) 1125 { 1126 int err, i; 1127 struct mmc_command cmd; 1128 struct mmc_data data; 1129 1130 memset(&cmd, 0, sizeof(struct mmc_command)); 1131 memset(&data, 0, sizeof(struct mmc_data)); 1132 1133 memset(rawsdstatus, 0, 64); 1134 cmd.opcode = ACMD_SD_STATUS; 1135 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1136 cmd.arg = 0; 1137 cmd.data = &data; 1138 1139 data.data = rawsdstatus; 1140 data.len = 64; 1141 data.flags = MMC_DATA_READ; 1142 1143 err = mmc_wait_for_app_cmd(sc, rca, &cmd, CMD_RETRIES); 1144 for (i = 0; i < 16; i++) 1145 rawsdstatus[i] = be32toh(rawsdstatus[i]); 1146 return (err); 1147 } 1148 1149 static int 1150 mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp) 1151 { 1152 struct mmc_command cmd; 1153 int err; 1154 1155 cmd.opcode = MMC_SET_RELATIVE_ADDR; 1156 cmd.arg = resp << 16; 1157 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1158 cmd.data = NULL; 1159 err = mmc_wait_for_cmd(sc, &cmd, 0); 1160 return (err); 1161 } 1162 1163 static int 1164 mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 1165 { 1166 struct mmc_command cmd; 1167 int err; 1168 1169 cmd.opcode = SD_SEND_RELATIVE_ADDR; 1170 cmd.arg = 0; 1171 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 1172 cmd.data = NULL; 1173 err = mmc_wait_for_cmd(sc, &cmd, 0); 1174 *resp = cmd.resp[0]; 1175 return (err); 1176 } 1177 1178 static int 1179 mmc_send_status(struct mmc_softc *sc, uint16_t rca, uint32_t *status) 1180 { 1181 struct mmc_command cmd; 1182 int err; 1183 1184 cmd.opcode = MMC_SEND_STATUS; 1185 cmd.arg = rca << 16; 1186 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1187 cmd.data = NULL; 1188 err = mmc_wait_for_cmd(sc, &cmd, 0); 1189 *status = cmd.resp[0]; 1190 return (err); 1191 } 1192 1193 static int 1194 mmc_set_blocklen(struct mmc_softc *sc, uint32_t len) 1195 { 1196 struct mmc_command cmd; 1197 int err; 1198 1199 cmd.opcode = MMC_SET_BLOCKLEN; 1200 cmd.arg = len; 1201 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1202 cmd.data = NULL; 1203 err = mmc_wait_for_cmd(sc, &cmd, 0); 1204 return (err); 1205 } 1206 1207 static void 1208 mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard) 1209 { 1210 device_printf(dev, "Card at relative address %d%s:\n", 1211 ivar->rca, newcard ? " added" : ""); 1212 device_printf(dev, " card: %s\n", ivar->card_id_string); 1213 device_printf(dev, " bus: %ubit, %uMHz%s\n", 1214 (ivar->bus_width == bus_width_1 ? 1 : 1215 (ivar->bus_width == bus_width_4 ? 4 : 8)), 1216 (ivar->timing == bus_timing_hs ? 1217 ivar->hs_tran_speed : ivar->tran_speed) / 1000000, 1218 ivar->timing == bus_timing_hs ? ", high speed timing" : ""); 1219 device_printf(dev, " memory: %u blocks, erase sector %u blocks%s\n", 1220 ivar->sec_count, ivar->erase_sector, 1221 ivar->read_only ? ", read-only" : ""); 1222 } 1223 1224 static void 1225 mmc_discover_cards(struct mmc_softc *sc) 1226 { 1227 struct mmc_ivars *ivar = NULL; 1228 device_t *devlist; 1229 int err, i, devcount, newcard; 1230 uint32_t raw_cid[4], resp, sec_count, status; 1231 device_t child; 1232 uint16_t rca = 2; 1233 u_char switch_res[64]; 1234 1235 if (bootverbose || mmc_debug) 1236 device_printf(sc->dev, "Probing cards\n"); 1237 while (1) { 1238 err = mmc_all_send_cid(sc, raw_cid); 1239 if (err == MMC_ERR_TIMEOUT) 1240 break; 1241 if (err != MMC_ERR_NONE) { 1242 device_printf(sc->dev, "Error reading CID %d\n", err); 1243 break; 1244 } 1245 newcard = 1; 1246 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1247 return; 1248 for (i = 0; i < devcount; i++) { 1249 ivar = device_get_ivars(devlist[i]); 1250 if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) { 1251 newcard = 0; 1252 break; 1253 } 1254 } 1255 free(devlist, M_TEMP); 1256 if (bootverbose || mmc_debug) { 1257 device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n", 1258 newcard ? "New c" : "C", 1259 raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]); 1260 } 1261 if (newcard) { 1262 ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, 1263 M_WAITOK | M_ZERO); 1264 if (!ivar) 1265 return; 1266 memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid)); 1267 } 1268 if (mmcbr_get_ro(sc->dev)) 1269 ivar->read_only = 1; 1270 ivar->bus_width = bus_width_1; 1271 ivar->timing = bus_timing_normal; 1272 ivar->mode = mmcbr_get_mode(sc->dev); 1273 if (ivar->mode == mode_sd) { 1274 mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid); 1275 mmc_send_relative_addr(sc, &resp); 1276 ivar->rca = resp >> 16; 1277 /* Get card CSD. */ 1278 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1279 if (bootverbose || mmc_debug) 1280 device_printf(sc->dev, 1281 "%sard detected (CSD %08x%08x%08x%08x)\n", 1282 newcard ? "New c" : "C", ivar->raw_csd[0], 1283 ivar->raw_csd[1], ivar->raw_csd[2], 1284 ivar->raw_csd[3]); 1285 mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd); 1286 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1287 if (ivar->csd.csd_structure > 0) 1288 ivar->high_cap = 1; 1289 ivar->tran_speed = ivar->csd.tran_speed; 1290 ivar->erase_sector = ivar->csd.erase_sector * 1291 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1292 1293 err = mmc_send_status(sc, ivar->rca, &status); 1294 if (err != MMC_ERR_NONE) { 1295 device_printf(sc->dev, 1296 "Error reading card status %d\n", err); 1297 break; 1298 } 1299 if ((status & R1_CARD_IS_LOCKED) != 0) { 1300 device_printf(sc->dev, 1301 "Card is password protected, skipping.\n"); 1302 break; 1303 } 1304 1305 /* Get card SCR. Card must be selected to fetch it. */ 1306 mmc_select_card(sc, ivar->rca); 1307 mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr); 1308 mmc_app_decode_scr(ivar->raw_scr, &ivar->scr); 1309 /* Get card switch capabilities (command class 10). */ 1310 if ((ivar->scr.sda_vsn >= 1) && 1311 (ivar->csd.ccc & (1<<10))) { 1312 mmc_sd_switch(sc, SD_SWITCH_MODE_CHECK, 1313 SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE, 1314 switch_res); 1315 if (switch_res[13] & 2) { 1316 ivar->timing = bus_timing_hs; 1317 ivar->hs_tran_speed = SD_MAX_HS; 1318 } 1319 } 1320 mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); 1321 mmc_app_decode_sd_status(ivar->raw_sd_status, 1322 &ivar->sd_status); 1323 if (ivar->sd_status.au_size != 0) { 1324 ivar->erase_sector = 1325 16 << ivar->sd_status.au_size; 1326 } 1327 mmc_select_card(sc, 0); 1328 /* Find max supported bus width. */ 1329 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) && 1330 (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) 1331 ivar->bus_width = bus_width_4; 1332 1333 /* 1334 * Some cards that report maximum I/O block sizes 1335 * greater than 512 require the block length to be 1336 * set to 512, even though that is supposed to be 1337 * the default. Example: 1338 * 1339 * Transcend 2GB SDSC card, CID: 1340 * mid=0x1b oid=0x534d pnm="00000" prv=1.0 mdt=00.2000 1341 */ 1342 if (ivar->csd.read_bl_len != MMC_SECTOR_SIZE || 1343 ivar->csd.write_bl_len != MMC_SECTOR_SIZE) 1344 mmc_set_blocklen(sc, MMC_SECTOR_SIZE); 1345 1346 mmc_format_card_id_string(ivar); 1347 1348 if (bootverbose || mmc_debug) 1349 mmc_log_card(sc->dev, ivar, newcard); 1350 if (newcard) { 1351 /* Add device. */ 1352 child = device_add_child(sc->dev, NULL, -1); 1353 device_set_ivars(child, ivar); 1354 } 1355 return; 1356 } 1357 mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid); 1358 ivar->rca = rca++; 1359 mmc_set_relative_addr(sc, ivar->rca); 1360 /* Get card CSD. */ 1361 mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 1362 if (bootverbose || mmc_debug) 1363 device_printf(sc->dev, 1364 "%sard detected (CSD %08x%08x%08x%08x)\n", 1365 newcard ? "New c" : "C", ivar->raw_csd[0], 1366 ivar->raw_csd[1], ivar->raw_csd[2], 1367 ivar->raw_csd[3]); 1368 1369 mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd); 1370 ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE; 1371 ivar->tran_speed = ivar->csd.tran_speed; 1372 ivar->erase_sector = ivar->csd.erase_sector * 1373 ivar->csd.write_bl_len / MMC_SECTOR_SIZE; 1374 1375 err = mmc_send_status(sc, ivar->rca, &status); 1376 if (err != MMC_ERR_NONE) { 1377 device_printf(sc->dev, 1378 "Error reading card status %d\n", err); 1379 break; 1380 } 1381 if ((status & R1_CARD_IS_LOCKED) != 0) { 1382 device_printf(sc->dev, 1383 "Card is password protected, skipping.\n"); 1384 break; 1385 } 1386 1387 /* Only MMC >= 4.x cards support EXT_CSD. */ 1388 if (ivar->csd.spec_vers >= 4) { 1389 /* Card must be selected to fetch EXT_CSD. */ 1390 mmc_select_card(sc, ivar->rca); 1391 mmc_send_ext_csd(sc, ivar->raw_ext_csd); 1392 /* Handle extended capacity from EXT_CSD */ 1393 sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] + 1394 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + 1395 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + 1396 (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 1397 if (sec_count != 0) { 1398 ivar->sec_count = sec_count; 1399 ivar->high_cap = 1; 1400 } 1401 /* Get card speed in high speed mode. */ 1402 ivar->timing = bus_timing_hs; 1403 if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1404 & EXT_CSD_CARD_TYPE_52) 1405 ivar->hs_tran_speed = MMC_TYPE_52_MAX_HS; 1406 else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE] 1407 & EXT_CSD_CARD_TYPE_26) 1408 ivar->hs_tran_speed = MMC_TYPE_26_MAX_HS; 1409 else 1410 ivar->hs_tran_speed = ivar->tran_speed; 1411 /* Find max supported bus width. */ 1412 ivar->bus_width = mmc_test_bus_width(sc); 1413 mmc_select_card(sc, 0); 1414 /* Handle HC erase sector size. */ 1415 if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) { 1416 ivar->erase_sector = 1024 * 1417 ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE]; 1418 mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL, 1419 EXT_CSD_ERASE_GRP_DEF, 1); 1420 } 1421 } else { 1422 ivar->bus_width = bus_width_1; 1423 ivar->timing = bus_timing_normal; 1424 } 1425 1426 /* 1427 * Some cards that report maximum I/O block sizes greater 1428 * than 512 require the block length to be set to 512, even 1429 * though that is supposed to be the default. Example: 1430 * 1431 * Transcend 2GB SDSC card, CID: 1432 * mid=0x1b oid=0x534d pnm="00000" prv=1.0 mdt=00.2000 1433 */ 1434 if (ivar->csd.read_bl_len != MMC_SECTOR_SIZE || 1435 ivar->csd.write_bl_len != MMC_SECTOR_SIZE) 1436 mmc_set_blocklen(sc, MMC_SECTOR_SIZE); 1437 1438 mmc_format_card_id_string(ivar); 1439 1440 if (bootverbose || mmc_debug) 1441 mmc_log_card(sc->dev, ivar, newcard); 1442 if (newcard) { 1443 /* Add device. */ 1444 child = device_add_child(sc->dev, NULL, -1); 1445 device_set_ivars(child, ivar); 1446 } 1447 } 1448 } 1449 1450 static void 1451 mmc_rescan_cards(struct mmc_softc *sc) 1452 { 1453 struct mmc_ivars *ivar = NULL; 1454 device_t *devlist; 1455 int err, i, devcount; 1456 1457 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1458 return; 1459 for (i = 0; i < devcount; i++) { 1460 ivar = device_get_ivars(devlist[i]); 1461 if (mmc_select_card(sc, ivar->rca)) { 1462 if (bootverbose || mmc_debug) 1463 device_printf(sc->dev, "Card at relative address %d lost.\n", 1464 ivar->rca); 1465 device_delete_child(sc->dev, devlist[i]); 1466 free(ivar, M_DEVBUF); 1467 } 1468 } 1469 free(devlist, M_TEMP); 1470 mmc_select_card(sc, 0); 1471 } 1472 1473 static int 1474 mmc_delete_cards(struct mmc_softc *sc) 1475 { 1476 struct mmc_ivars *ivar; 1477 device_t *devlist; 1478 int err, i, devcount; 1479 1480 if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0) 1481 return (err); 1482 for (i = 0; i < devcount; i++) { 1483 ivar = device_get_ivars(devlist[i]); 1484 if (bootverbose || mmc_debug) 1485 device_printf(sc->dev, "Card at relative address %d deleted.\n", 1486 ivar->rca); 1487 device_delete_child(sc->dev, devlist[i]); 1488 free(ivar, M_DEVBUF); 1489 } 1490 free(devlist, M_TEMP); 1491 return (0); 1492 } 1493 1494 static void 1495 mmc_go_discovery(struct mmc_softc *sc) 1496 { 1497 uint32_t ocr; 1498 device_t dev; 1499 int err; 1500 1501 dev = sc->dev; 1502 if (mmcbr_get_power_mode(dev) != power_on) { 1503 /* 1504 * First, try SD modes 1505 */ 1506 mmcbr_set_mode(dev, mode_sd); 1507 mmc_power_up(sc); 1508 mmcbr_set_bus_mode(dev, pushpull); 1509 if (bootverbose || mmc_debug) 1510 device_printf(sc->dev, "Probing bus\n"); 1511 mmc_idle_cards(sc); 1512 err = mmc_send_if_cond(sc, 1); 1513 if ((bootverbose || mmc_debug) && err == 0) 1514 device_printf(sc->dev, "SD 2.0 interface conditions: OK\n"); 1515 if (mmc_send_app_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 1516 if (bootverbose || mmc_debug) 1517 device_printf(sc->dev, "SD probe: failed\n"); 1518 /* 1519 * Failed, try MMC 1520 */ 1521 mmcbr_set_mode(dev, mode_mmc); 1522 if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 1523 if (bootverbose || mmc_debug) 1524 device_printf(sc->dev, "MMC probe: failed\n"); 1525 ocr = 0; /* Failed both, powerdown. */ 1526 } else if (bootverbose || mmc_debug) 1527 device_printf(sc->dev, 1528 "MMC probe: OK (OCR: 0x%08x)\n", ocr); 1529 } else if (bootverbose || mmc_debug) 1530 device_printf(sc->dev, "SD probe: OK (OCR: 0x%08x)\n", ocr); 1531 1532 mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 1533 if (mmcbr_get_ocr(dev) != 0) 1534 mmc_idle_cards(sc); 1535 } else { 1536 mmcbr_set_bus_mode(dev, opendrain); 1537 mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 1538 mmcbr_update_ios(dev); 1539 /* XXX recompute vdd based on new cards? */ 1540 } 1541 /* 1542 * Make sure that we have a mutually agreeable voltage to at least 1543 * one card on the bus. 1544 */ 1545 if (bootverbose || mmc_debug) 1546 device_printf(sc->dev, "Current OCR: 0x%08x\n", mmcbr_get_ocr(dev)); 1547 if (mmcbr_get_ocr(dev) == 0) { 1548 mmc_delete_cards(sc); 1549 mmc_power_down(sc); 1550 return; 1551 } 1552 /* 1553 * Reselect the cards after we've idled them above. 1554 */ 1555 if (mmcbr_get_mode(dev) == mode_sd) { 1556 err = mmc_send_if_cond(sc, 1); 1557 mmc_send_app_op_cond(sc, 1558 (err ? 0 : MMC_OCR_CCS) | mmcbr_get_ocr(dev), NULL); 1559 } else 1560 mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 1561 mmc_discover_cards(sc); 1562 mmc_rescan_cards(sc); 1563 1564 mmcbr_set_bus_mode(dev, pushpull); 1565 mmcbr_update_ios(dev); 1566 mmc_calculate_clock(sc); 1567 bus_generic_attach(dev); 1568 /* mmc_update_children_sysctl(dev);*/ 1569 } 1570 1571 static int 1572 mmc_calculate_clock(struct mmc_softc *sc) 1573 { 1574 int max_dtr, max_hs_dtr, max_timing; 1575 int nkid, i, f_min, f_max; 1576 device_t *kids; 1577 struct mmc_ivars *ivar; 1578 1579 f_min = mmcbr_get_f_min(sc->dev); 1580 f_max = mmcbr_get_f_max(sc->dev); 1581 max_dtr = max_hs_dtr = f_max; 1582 if ((mmcbr_get_caps(sc->dev) & MMC_CAP_HSPEED)) 1583 max_timing = bus_timing_hs; 1584 else 1585 max_timing = bus_timing_normal; 1586 if (device_get_children(sc->dev, &kids, &nkid) != 0) 1587 panic("can't get children"); 1588 for (i = 0; i < nkid; i++) { 1589 ivar = device_get_ivars(kids[i]); 1590 if (ivar->timing < max_timing) 1591 max_timing = ivar->timing; 1592 if (ivar->tran_speed < max_dtr) 1593 max_dtr = ivar->tran_speed; 1594 if (ivar->hs_tran_speed < max_hs_dtr) 1595 max_hs_dtr = ivar->hs_tran_speed; 1596 } 1597 for (i = 0; i < nkid; i++) { 1598 ivar = device_get_ivars(kids[i]); 1599 if (ivar->timing == bus_timing_normal) 1600 continue; 1601 mmc_select_card(sc, ivar->rca); 1602 mmc_set_timing(sc, max_timing); 1603 } 1604 mmc_select_card(sc, 0); 1605 free(kids, M_TEMP); 1606 if (max_timing == bus_timing_hs) 1607 max_dtr = max_hs_dtr; 1608 if (bootverbose || mmc_debug) { 1609 device_printf(sc->dev, 1610 "setting transfer rate to %d.%03dMHz%s\n", 1611 max_dtr / 1000000, (max_dtr / 1000) % 1000, 1612 max_timing == bus_timing_hs ? " (high speed timing)" : ""); 1613 } 1614 mmcbr_set_timing(sc->dev, max_timing); 1615 mmcbr_set_clock(sc->dev, max_dtr); 1616 mmcbr_update_ios(sc->dev); 1617 return max_dtr; 1618 } 1619 1620 static void 1621 mmc_scan(struct mmc_softc *sc) 1622 { 1623 device_t dev = sc->dev; 1624 1625 mmc_acquire_bus(dev, dev); 1626 mmc_go_discovery(sc); 1627 mmc_release_bus(dev, dev); 1628 } 1629 1630 static int 1631 mmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) 1632 { 1633 struct mmc_ivars *ivar = device_get_ivars(child); 1634 1635 switch (which) { 1636 default: 1637 return (EINVAL); 1638 case MMC_IVAR_DSR_IMP: 1639 *result = ivar->csd.dsr_imp; 1640 break; 1641 case MMC_IVAR_MEDIA_SIZE: 1642 *result = ivar->sec_count; 1643 break; 1644 case MMC_IVAR_RCA: 1645 *result = ivar->rca; 1646 break; 1647 case MMC_IVAR_SECTOR_SIZE: 1648 *result = MMC_SECTOR_SIZE; 1649 break; 1650 case MMC_IVAR_TRAN_SPEED: 1651 *result = mmcbr_get_clock(bus); 1652 break; 1653 case MMC_IVAR_READ_ONLY: 1654 *result = ivar->read_only; 1655 break; 1656 case MMC_IVAR_HIGH_CAP: 1657 *result = ivar->high_cap; 1658 break; 1659 case MMC_IVAR_CARD_TYPE: 1660 *result = ivar->mode; 1661 break; 1662 case MMC_IVAR_BUS_WIDTH: 1663 *result = ivar->bus_width; 1664 break; 1665 case MMC_IVAR_ERASE_SECTOR: 1666 *result = ivar->erase_sector; 1667 break; 1668 case MMC_IVAR_MAX_DATA: 1669 *result = mmcbr_get_max_data(bus); 1670 break; 1671 case MMC_IVAR_CARD_ID_STRING: 1672 *(char **)result = ivar->card_id_string; 1673 break; 1674 } 1675 return (0); 1676 } 1677 1678 static int 1679 mmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 1680 { 1681 /* 1682 * None are writable ATM 1683 */ 1684 return (EINVAL); 1685 } 1686 1687 static void 1688 mmc_delayed_attach(void *xsc) 1689 { 1690 struct mmc_softc *sc = xsc; 1691 1692 mmc_scan(sc); 1693 config_intrhook_disestablish(&sc->config_intrhook); 1694 } 1695 1696 static int 1697 mmc_child_location_str(device_t dev, device_t child, char *buf, 1698 size_t buflen) 1699 { 1700 1701 snprintf(buf, buflen, "rca=0x%04x", mmc_get_rca(child)); 1702 return (0); 1703 } 1704 1705 static device_method_t mmc_methods[] = { 1706 /* device_if */ 1707 DEVMETHOD(device_probe, mmc_probe), 1708 DEVMETHOD(device_attach, mmc_attach), 1709 DEVMETHOD(device_detach, mmc_detach), 1710 DEVMETHOD(device_suspend, mmc_suspend), 1711 DEVMETHOD(device_resume, mmc_resume), 1712 1713 /* Bus interface */ 1714 DEVMETHOD(bus_read_ivar, mmc_read_ivar), 1715 DEVMETHOD(bus_write_ivar, mmc_write_ivar), 1716 DEVMETHOD(bus_child_location_str, mmc_child_location_str), 1717 1718 /* MMC Bus interface */ 1719 DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 1720 DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 1721 DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 1722 1723 DEVMETHOD_END 1724 }; 1725 1726 static driver_t mmc_driver = { 1727 "mmc", 1728 mmc_methods, 1729 sizeof(struct mmc_softc), 1730 }; 1731 static devclass_t mmc_devclass; 1732 1733 DRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, NULL, NULL); 1734 DRIVER_MODULE(mmc, sdhci, mmc_driver, mmc_devclass, NULL, NULL);
Cache object: a8c154525655e6960b8c8db58c24a588
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