1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2008, Freescale Semiconductor, Inc 4 * Andy Fleming 5 * 6 * Based vaguely on the Linux code 7 */ 8 9 #include <config.h> 10 #include <common.h> 11 #include <command.h> 12 #include <dm.h> 13 #include <dm/device-internal.h> 14 #include <errno.h> 15 #include <mmc.h> 16 #include <part.h> 17 #include <power/regulator.h> 18 #include <malloc.h> 19 #include <memalign.h> 20 #include <linux/list.h> 21 #include <div64.h> 22 #include "mmc_private.h" 23 24 static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage); 25 static int mmc_power_cycle(struct mmc *mmc); 26 #if !CONFIG_IS_ENABLED(MMC_TINY) 27 static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps); 28 #endif 29 30 #if !CONFIG_IS_ENABLED(DM_MMC) 31 32 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 33 static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout) 34 { 35 return -ENOSYS; 36 } 37 #endif 38 39 __weak int board_mmc_getwp(struct mmc *mmc) 40 { 41 return -1; 42 } 43 44 int mmc_getwp(struct mmc *mmc) 45 { 46 int wp; 47 48 wp = board_mmc_getwp(mmc); 49 50 if (wp < 0) { 51 if (mmc->cfg->ops->getwp) 52 wp = mmc->cfg->ops->getwp(mmc); 53 else 54 wp = 0; 55 } 56 57 return wp; 58 } 59 60 __weak int board_mmc_getcd(struct mmc *mmc) 61 { 62 return -1; 63 } 64 #endif 65 66 #ifdef CONFIG_MMC_TRACE 67 void mmmc_trace_before_send(struct mmc *mmc, struct mmc_cmd *cmd) 68 { 69 printf("CMD_SEND:%d\n", cmd->cmdidx); 70 printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg); 71 } 72 73 void mmmc_trace_after_send(struct mmc *mmc, struct mmc_cmd *cmd, int ret) 74 { 75 int i; 76 u8 *ptr; 77 78 if (ret) { 79 printf("\t\tRET\t\t\t %d\n", ret); 80 } else { 81 switch (cmd->resp_type) { 82 case MMC_RSP_NONE: 83 printf("\t\tMMC_RSP_NONE\n"); 84 break; 85 case MMC_RSP_R1: 86 printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n", 87 cmd->response[0]); 88 break; 89 case MMC_RSP_R1b: 90 printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n", 91 cmd->response[0]); 92 break; 93 case MMC_RSP_R2: 94 printf("\t\tMMC_RSP_R2\t\t 0x%08X \n", 95 cmd->response[0]); 96 printf("\t\t \t\t 0x%08X \n", 97 cmd->response[1]); 98 printf("\t\t \t\t 0x%08X \n", 99 cmd->response[2]); 100 printf("\t\t \t\t 0x%08X \n", 101 cmd->response[3]); 102 printf("\n"); 103 printf("\t\t\t\t\tDUMPING DATA\n"); 104 for (i = 0; i < 4; i++) { 105 int j; 106 printf("\t\t\t\t\t%03d - ", i*4); 107 ptr = (u8 *)&cmd->response[i]; 108 ptr += 3; 109 for (j = 0; j < 4; j++) 110 printf("%02X ", *ptr--); 111 printf("\n"); 112 } 113 break; 114 case MMC_RSP_R3: 115 printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n", 116 cmd->response[0]); 117 break; 118 default: 119 printf("\t\tERROR MMC rsp not supported\n"); 120 break; 121 } 122 } 123 } 124 125 void mmc_trace_state(struct mmc *mmc, struct mmc_cmd *cmd) 126 { 127 int status; 128 129 status = (cmd->response[0] & MMC_STATUS_CURR_STATE) >> 9; 130 printf("CURR STATE:%d\n", status); 131 } 132 #endif 133 134 #if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG) 135 const char *mmc_mode_name(enum bus_mode mode) 136 { 137 static const char *const names[] = { 138 [MMC_LEGACY] = "MMC legacy", 139 [SD_LEGACY] = "SD Legacy", 140 [MMC_HS] = "MMC High Speed (26MHz)", 141 [SD_HS] = "SD High Speed (50MHz)", 142 [UHS_SDR12] = "UHS SDR12 (25MHz)", 143 [UHS_SDR25] = "UHS SDR25 (50MHz)", 144 [UHS_SDR50] = "UHS SDR50 (100MHz)", 145 [UHS_SDR104] = "UHS SDR104 (208MHz)", 146 [UHS_DDR50] = "UHS DDR50 (50MHz)", 147 [MMC_HS_52] = "MMC High Speed (52MHz)", 148 [MMC_DDR_52] = "MMC DDR52 (52MHz)", 149 [MMC_HS_200] = "HS200 (200MHz)", 150 [MMC_HS_400] = "HS400 (200MHz)", 151 }; 152 153 if (mode >= MMC_MODES_END) 154 return "Unknown mode"; 155 else 156 return names[mode]; 157 } 158 #endif 159 160 static uint mmc_mode2freq(struct mmc *mmc, enum bus_mode mode) 161 { 162 static const int freqs[] = { 163 [MMC_LEGACY] = 25000000, 164 [SD_LEGACY] = 25000000, 165 [MMC_HS] = 26000000, 166 [SD_HS] = 50000000, 167 [MMC_HS_52] = 52000000, 168 [MMC_DDR_52] = 52000000, 169 [UHS_SDR12] = 25000000, 170 [UHS_SDR25] = 50000000, 171 [UHS_SDR50] = 100000000, 172 [UHS_DDR50] = 50000000, 173 [UHS_SDR104] = 208000000, 174 [MMC_HS_200] = 200000000, 175 [MMC_HS_400] = 200000000, 176 }; 177 178 if (mode == MMC_LEGACY) 179 return mmc->legacy_speed; 180 else if (mode >= MMC_MODES_END) 181 return 0; 182 else 183 return freqs[mode]; 184 } 185 186 static int mmc_select_mode(struct mmc *mmc, enum bus_mode mode) 187 { 188 mmc->selected_mode = mode; 189 mmc->tran_speed = mmc_mode2freq(mmc, mode); 190 mmc->ddr_mode = mmc_is_mode_ddr(mode); 191 pr_debug("selecting mode %s (freq : %d MHz)\n", mmc_mode_name(mode), 192 mmc->tran_speed / 1000000); 193 return 0; 194 } 195 196 #if !CONFIG_IS_ENABLED(DM_MMC) 197 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) 198 { 199 int ret; 200 201 mmmc_trace_before_send(mmc, cmd); 202 ret = mmc->cfg->ops->send_cmd(mmc, cmd, data); 203 mmmc_trace_after_send(mmc, cmd, ret); 204 205 return ret; 206 } 207 #endif 208 209 int mmc_send_status(struct mmc *mmc, int timeout) 210 { 211 struct mmc_cmd cmd; 212 int err, retries = 5; 213 214 cmd.cmdidx = MMC_CMD_SEND_STATUS; 215 cmd.resp_type = MMC_RSP_R1; 216 if (!mmc_host_is_spi(mmc)) 217 cmd.cmdarg = mmc->rca << 16; 218 219 while (1) { 220 err = mmc_send_cmd(mmc, &cmd, NULL); 221 if (!err) { 222 if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) && 223 (cmd.response[0] & MMC_STATUS_CURR_STATE) != 224 MMC_STATE_PRG) 225 break; 226 227 if (cmd.response[0] & MMC_STATUS_MASK) { 228 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 229 pr_err("Status Error: 0x%08X\n", 230 cmd.response[0]); 231 #endif 232 return -ECOMM; 233 } 234 } else if (--retries < 0) 235 return err; 236 237 if (timeout-- <= 0) 238 break; 239 240 udelay(1000); 241 } 242 243 mmc_trace_state(mmc, &cmd); 244 if (timeout <= 0) { 245 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 246 pr_err("Timeout waiting card ready\n"); 247 #endif 248 return -ETIMEDOUT; 249 } 250 251 return 0; 252 } 253 254 int mmc_set_blocklen(struct mmc *mmc, int len) 255 { 256 struct mmc_cmd cmd; 257 int err; 258 259 if (mmc->ddr_mode) 260 return 0; 261 262 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN; 263 cmd.resp_type = MMC_RSP_R1; 264 cmd.cmdarg = len; 265 266 err = mmc_send_cmd(mmc, &cmd, NULL); 267 268 #ifdef CONFIG_MMC_QUIRKS 269 if (err && (mmc->quirks & MMC_QUIRK_RETRY_SET_BLOCKLEN)) { 270 int retries = 4; 271 /* 272 * It has been seen that SET_BLOCKLEN may fail on the first 273 * attempt, let's try a few more time 274 */ 275 do { 276 err = mmc_send_cmd(mmc, &cmd, NULL); 277 if (!err) 278 break; 279 } while (retries--); 280 } 281 #endif 282 283 return err; 284 } 285 286 #ifdef MMC_SUPPORTS_TUNING 287 static const u8 tuning_blk_pattern_4bit[] = { 288 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc, 289 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef, 290 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb, 291 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef, 292 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c, 293 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee, 294 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff, 295 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde, 296 }; 297 298 static const u8 tuning_blk_pattern_8bit[] = { 299 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, 300 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, 301 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, 302 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, 303 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, 304 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, 305 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, 306 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, 307 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 308 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 309 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 310 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 311 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 312 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 313 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 314 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 315 }; 316 317 int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error) 318 { 319 struct mmc_cmd cmd; 320 struct mmc_data data; 321 const u8 *tuning_block_pattern; 322 int size, err; 323 324 if (mmc->bus_width == 8) { 325 tuning_block_pattern = tuning_blk_pattern_8bit; 326 size = sizeof(tuning_blk_pattern_8bit); 327 } else if (mmc->bus_width == 4) { 328 tuning_block_pattern = tuning_blk_pattern_4bit; 329 size = sizeof(tuning_blk_pattern_4bit); 330 } else { 331 return -EINVAL; 332 } 333 334 ALLOC_CACHE_ALIGN_BUFFER(u8, data_buf, size); 335 336 cmd.cmdidx = opcode; 337 cmd.cmdarg = 0; 338 cmd.resp_type = MMC_RSP_R1; 339 340 data.dest = (void *)data_buf; 341 data.blocks = 1; 342 data.blocksize = size; 343 data.flags = MMC_DATA_READ; 344 345 err = mmc_send_cmd(mmc, &cmd, &data); 346 if (err) 347 return err; 348 349 if (memcmp(data_buf, tuning_block_pattern, size)) 350 return -EIO; 351 352 return 0; 353 } 354 #endif 355 356 static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start, 357 lbaint_t blkcnt) 358 { 359 struct mmc_cmd cmd; 360 struct mmc_data data; 361 362 if (blkcnt > 1) 363 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK; 364 else 365 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; 366 367 if (mmc->high_capacity) 368 cmd.cmdarg = start; 369 else 370 cmd.cmdarg = start * mmc->read_bl_len; 371 372 cmd.resp_type = MMC_RSP_R1; 373 374 data.dest = dst; 375 data.blocks = blkcnt; 376 data.blocksize = mmc->read_bl_len; 377 data.flags = MMC_DATA_READ; 378 379 if (mmc_send_cmd(mmc, &cmd, &data)) 380 return 0; 381 382 if (blkcnt > 1) { 383 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; 384 cmd.cmdarg = 0; 385 cmd.resp_type = MMC_RSP_R1b; 386 if (mmc_send_cmd(mmc, &cmd, NULL)) { 387 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 388 pr_err("mmc fail to send stop cmd\n"); 389 #endif 390 return 0; 391 } 392 } 393 394 return blkcnt; 395 } 396 397 #if CONFIG_IS_ENABLED(BLK) 398 ulong mmc_bread(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, void *dst) 399 #else 400 ulong mmc_bread(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt, 401 void *dst) 402 #endif 403 { 404 #if CONFIG_IS_ENABLED(BLK) 405 struct blk_desc *block_dev = dev_get_uclass_platdata(dev); 406 #endif 407 int dev_num = block_dev->devnum; 408 int err; 409 lbaint_t cur, blocks_todo = blkcnt; 410 411 if (blkcnt == 0) 412 return 0; 413 414 struct mmc *mmc = find_mmc_device(dev_num); 415 if (!mmc) 416 return 0; 417 418 if (CONFIG_IS_ENABLED(MMC_TINY)) 419 err = mmc_switch_part(mmc, block_dev->hwpart); 420 else 421 err = blk_dselect_hwpart(block_dev, block_dev->hwpart); 422 423 if (err < 0) 424 return 0; 425 426 if ((start + blkcnt) > block_dev->lba) { 427 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 428 pr_err("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n", 429 start + blkcnt, block_dev->lba); 430 #endif 431 return 0; 432 } 433 434 if (mmc_set_blocklen(mmc, mmc->read_bl_len)) { 435 pr_debug("%s: Failed to set blocklen\n", __func__); 436 return 0; 437 } 438 439 do { 440 cur = (blocks_todo > mmc->cfg->b_max) ? 441 mmc->cfg->b_max : blocks_todo; 442 if (mmc_read_blocks(mmc, dst, start, cur) != cur) { 443 pr_debug("%s: Failed to read blocks\n", __func__); 444 return 0; 445 } 446 blocks_todo -= cur; 447 start += cur; 448 dst += cur * mmc->read_bl_len; 449 } while (blocks_todo > 0); 450 451 return blkcnt; 452 } 453 454 static int mmc_go_idle(struct mmc *mmc) 455 { 456 struct mmc_cmd cmd; 457 int err; 458 459 udelay(1000); 460 461 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE; 462 cmd.cmdarg = 0; 463 cmd.resp_type = MMC_RSP_NONE; 464 465 err = mmc_send_cmd(mmc, &cmd, NULL); 466 467 if (err) 468 return err; 469 470 udelay(2000); 471 472 return 0; 473 } 474 475 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 476 static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage) 477 { 478 struct mmc_cmd cmd; 479 int err = 0; 480 481 /* 482 * Send CMD11 only if the request is to switch the card to 483 * 1.8V signalling. 484 */ 485 if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) 486 return mmc_set_signal_voltage(mmc, signal_voltage); 487 488 cmd.cmdidx = SD_CMD_SWITCH_UHS18V; 489 cmd.cmdarg = 0; 490 cmd.resp_type = MMC_RSP_R1; 491 492 err = mmc_send_cmd(mmc, &cmd, NULL); 493 if (err) 494 return err; 495 496 if (!mmc_host_is_spi(mmc) && (cmd.response[0] & MMC_STATUS_ERROR)) 497 return -EIO; 498 499 /* 500 * The card should drive cmd and dat[0:3] low immediately 501 * after the response of cmd11, but wait 100 us to be sure 502 */ 503 err = mmc_wait_dat0(mmc, 0, 100); 504 if (err == -ENOSYS) 505 udelay(100); 506 else if (err) 507 return -ETIMEDOUT; 508 509 /* 510 * During a signal voltage level switch, the clock must be gated 511 * for 5 ms according to the SD spec 512 */ 513 mmc_set_clock(mmc, mmc->clock, MMC_CLK_DISABLE); 514 515 err = mmc_set_signal_voltage(mmc, signal_voltage); 516 if (err) 517 return err; 518 519 /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ 520 mdelay(10); 521 mmc_set_clock(mmc, mmc->clock, MMC_CLK_ENABLE); 522 523 /* 524 * Failure to switch is indicated by the card holding 525 * dat[0:3] low. Wait for at least 1 ms according to spec 526 */ 527 err = mmc_wait_dat0(mmc, 1, 1000); 528 if (err == -ENOSYS) 529 udelay(1000); 530 else if (err) 531 return -ETIMEDOUT; 532 533 return 0; 534 } 535 #endif 536 537 static int sd_send_op_cond(struct mmc *mmc, bool uhs_en) 538 { 539 int timeout = 1000; 540 int err; 541 struct mmc_cmd cmd; 542 543 while (1) { 544 cmd.cmdidx = MMC_CMD_APP_CMD; 545 cmd.resp_type = MMC_RSP_R1; 546 cmd.cmdarg = 0; 547 548 err = mmc_send_cmd(mmc, &cmd, NULL); 549 550 if (err) 551 return err; 552 553 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND; 554 cmd.resp_type = MMC_RSP_R3; 555 556 /* 557 * Most cards do not answer if some reserved bits 558 * in the ocr are set. However, Some controller 559 * can set bit 7 (reserved for low voltages), but 560 * how to manage low voltages SD card is not yet 561 * specified. 562 */ 563 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 : 564 (mmc->cfg->voltages & 0xff8000); 565 566 if (mmc->version == SD_VERSION_2) 567 cmd.cmdarg |= OCR_HCS; 568 569 if (uhs_en) 570 cmd.cmdarg |= OCR_S18R; 571 572 err = mmc_send_cmd(mmc, &cmd, NULL); 573 574 if (err) 575 return err; 576 577 if (cmd.response[0] & OCR_BUSY) 578 break; 579 580 if (timeout-- <= 0) 581 return -EOPNOTSUPP; 582 583 udelay(1000); 584 } 585 586 if (mmc->version != SD_VERSION_2) 587 mmc->version = SD_VERSION_1_0; 588 589 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */ 590 cmd.cmdidx = MMC_CMD_SPI_READ_OCR; 591 cmd.resp_type = MMC_RSP_R3; 592 cmd.cmdarg = 0; 593 594 err = mmc_send_cmd(mmc, &cmd, NULL); 595 596 if (err) 597 return err; 598 } 599 600 mmc->ocr = cmd.response[0]; 601 602 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 603 if (uhs_en && !(mmc_host_is_spi(mmc)) && (cmd.response[0] & 0x41000000) 604 == 0x41000000) { 605 err = mmc_switch_voltage(mmc, MMC_SIGNAL_VOLTAGE_180); 606 if (err) 607 return err; 608 } 609 #endif 610 611 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); 612 mmc->rca = 0; 613 614 return 0; 615 } 616 617 static int mmc_send_op_cond_iter(struct mmc *mmc, int use_arg) 618 { 619 struct mmc_cmd cmd; 620 int err; 621 622 cmd.cmdidx = MMC_CMD_SEND_OP_COND; 623 cmd.resp_type = MMC_RSP_R3; 624 cmd.cmdarg = 0; 625 if (use_arg && !mmc_host_is_spi(mmc)) 626 cmd.cmdarg = OCR_HCS | 627 (mmc->cfg->voltages & 628 (mmc->ocr & OCR_VOLTAGE_MASK)) | 629 (mmc->ocr & OCR_ACCESS_MODE); 630 631 err = mmc_send_cmd(mmc, &cmd, NULL); 632 if (err) 633 return err; 634 mmc->ocr = cmd.response[0]; 635 return 0; 636 } 637 638 static int mmc_send_op_cond(struct mmc *mmc) 639 { 640 int err, i; 641 642 /* Some cards seem to need this */ 643 mmc_go_idle(mmc); 644 645 /* Asking to the card its capabilities */ 646 for (i = 0; i < 2; i++) { 647 err = mmc_send_op_cond_iter(mmc, i != 0); 648 if (err) 649 return err; 650 651 /* exit if not busy (flag seems to be inverted) */ 652 if (mmc->ocr & OCR_BUSY) 653 break; 654 } 655 mmc->op_cond_pending = 1; 656 return 0; 657 } 658 659 static int mmc_complete_op_cond(struct mmc *mmc) 660 { 661 struct mmc_cmd cmd; 662 int timeout = 1000; 663 ulong start; 664 int err; 665 666 mmc->op_cond_pending = 0; 667 if (!(mmc->ocr & OCR_BUSY)) { 668 /* Some cards seem to need this */ 669 mmc_go_idle(mmc); 670 671 start = get_timer(0); 672 while (1) { 673 err = mmc_send_op_cond_iter(mmc, 1); 674 if (err) 675 return err; 676 if (mmc->ocr & OCR_BUSY) 677 break; 678 if (get_timer(start) > timeout) 679 return -EOPNOTSUPP; 680 udelay(100); 681 } 682 } 683 684 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */ 685 cmd.cmdidx = MMC_CMD_SPI_READ_OCR; 686 cmd.resp_type = MMC_RSP_R3; 687 cmd.cmdarg = 0; 688 689 err = mmc_send_cmd(mmc, &cmd, NULL); 690 691 if (err) 692 return err; 693 694 mmc->ocr = cmd.response[0]; 695 } 696 697 mmc->version = MMC_VERSION_UNKNOWN; 698 699 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); 700 mmc->rca = 1; 701 702 return 0; 703 } 704 705 706 static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd) 707 { 708 struct mmc_cmd cmd; 709 struct mmc_data data; 710 int err; 711 712 /* Get the Card Status Register */ 713 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD; 714 cmd.resp_type = MMC_RSP_R1; 715 cmd.cmdarg = 0; 716 717 data.dest = (char *)ext_csd; 718 data.blocks = 1; 719 data.blocksize = MMC_MAX_BLOCK_LEN; 720 data.flags = MMC_DATA_READ; 721 722 err = mmc_send_cmd(mmc, &cmd, &data); 723 724 return err; 725 } 726 727 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value) 728 { 729 struct mmc_cmd cmd; 730 int timeout = 1000; 731 int retries = 3; 732 int ret; 733 734 cmd.cmdidx = MMC_CMD_SWITCH; 735 cmd.resp_type = MMC_RSP_R1b; 736 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | 737 (index << 16) | 738 (value << 8); 739 740 while (retries > 0) { 741 ret = mmc_send_cmd(mmc, &cmd, NULL); 742 743 /* Waiting for the ready status */ 744 if (!ret) { 745 ret = mmc_send_status(mmc, timeout); 746 return ret; 747 } 748 749 retries--; 750 } 751 752 return ret; 753 754 } 755 756 #if !CONFIG_IS_ENABLED(MMC_TINY) 757 static int mmc_set_card_speed(struct mmc *mmc, enum bus_mode mode) 758 { 759 int err; 760 int speed_bits; 761 762 ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); 763 764 switch (mode) { 765 case MMC_HS: 766 case MMC_HS_52: 767 case MMC_DDR_52: 768 speed_bits = EXT_CSD_TIMING_HS; 769 break; 770 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) 771 case MMC_HS_200: 772 speed_bits = EXT_CSD_TIMING_HS200; 773 break; 774 #endif 775 #if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) 776 case MMC_HS_400: 777 speed_bits = EXT_CSD_TIMING_HS400; 778 break; 779 #endif 780 case MMC_LEGACY: 781 speed_bits = EXT_CSD_TIMING_LEGACY; 782 break; 783 default: 784 return -EINVAL; 785 } 786 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 787 speed_bits); 788 if (err) 789 return err; 790 791 if ((mode == MMC_HS) || (mode == MMC_HS_52)) { 792 /* Now check to see that it worked */ 793 err = mmc_send_ext_csd(mmc, test_csd); 794 if (err) 795 return err; 796 797 /* No high-speed support */ 798 if (!test_csd[EXT_CSD_HS_TIMING]) 799 return -ENOTSUPP; 800 } 801 802 return 0; 803 } 804 805 static int mmc_get_capabilities(struct mmc *mmc) 806 { 807 u8 *ext_csd = mmc->ext_csd; 808 char cardtype; 809 810 mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(MMC_LEGACY); 811 812 if (mmc_host_is_spi(mmc)) 813 return 0; 814 815 /* Only version 4 supports high-speed */ 816 if (mmc->version < MMC_VERSION_4) 817 return 0; 818 819 if (!ext_csd) { 820 pr_err("No ext_csd found!\n"); /* this should enver happen */ 821 return -ENOTSUPP; 822 } 823 824 mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT; 825 826 cardtype = ext_csd[EXT_CSD_CARD_TYPE]; 827 mmc->cardtype = cardtype; 828 829 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) 830 if (cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V | 831 EXT_CSD_CARD_TYPE_HS200_1_8V)) { 832 mmc->card_caps |= MMC_MODE_HS200; 833 } 834 #endif 835 #if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) 836 if (cardtype & (EXT_CSD_CARD_TYPE_HS400_1_2V | 837 EXT_CSD_CARD_TYPE_HS400_1_8V)) { 838 mmc->card_caps |= MMC_MODE_HS400; 839 } 840 #endif 841 if (cardtype & EXT_CSD_CARD_TYPE_52) { 842 if (cardtype & EXT_CSD_CARD_TYPE_DDR_52) 843 mmc->card_caps |= MMC_MODE_DDR_52MHz; 844 mmc->card_caps |= MMC_MODE_HS_52MHz; 845 } 846 if (cardtype & EXT_CSD_CARD_TYPE_26) 847 mmc->card_caps |= MMC_MODE_HS; 848 849 return 0; 850 } 851 #endif 852 853 static int mmc_set_capacity(struct mmc *mmc, int part_num) 854 { 855 switch (part_num) { 856 case 0: 857 mmc->capacity = mmc->capacity_user; 858 break; 859 case 1: 860 case 2: 861 mmc->capacity = mmc->capacity_boot; 862 break; 863 case 3: 864 mmc->capacity = mmc->capacity_rpmb; 865 break; 866 case 4: 867 case 5: 868 case 6: 869 case 7: 870 mmc->capacity = mmc->capacity_gp[part_num - 4]; 871 break; 872 default: 873 return -1; 874 } 875 876 mmc_get_blk_desc(mmc)->lba = lldiv(mmc->capacity, mmc->read_bl_len); 877 878 return 0; 879 } 880 881 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) 882 static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num) 883 { 884 int forbidden = 0; 885 bool change = false; 886 887 if (part_num & PART_ACCESS_MASK) 888 forbidden = MMC_CAP(MMC_HS_200); 889 890 if (MMC_CAP(mmc->selected_mode) & forbidden) { 891 pr_debug("selected mode (%s) is forbidden for part %d\n", 892 mmc_mode_name(mmc->selected_mode), part_num); 893 change = true; 894 } else if (mmc->selected_mode != mmc->best_mode) { 895 pr_debug("selected mode is not optimal\n"); 896 change = true; 897 } 898 899 if (change) 900 return mmc_select_mode_and_width(mmc, 901 mmc->card_caps & ~forbidden); 902 903 return 0; 904 } 905 #else 906 static inline int mmc_boot_part_access_chk(struct mmc *mmc, 907 unsigned int part_num) 908 { 909 return 0; 910 } 911 #endif 912 913 int mmc_switch_part(struct mmc *mmc, unsigned int part_num) 914 { 915 int ret; 916 917 ret = mmc_boot_part_access_chk(mmc, part_num); 918 if (ret) 919 return ret; 920 921 ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, 922 (mmc->part_config & ~PART_ACCESS_MASK) 923 | (part_num & PART_ACCESS_MASK)); 924 925 /* 926 * Set the capacity if the switch succeeded or was intended 927 * to return to representing the raw device. 928 */ 929 if ((ret == 0) || ((ret == -ENODEV) && (part_num == 0))) { 930 ret = mmc_set_capacity(mmc, part_num); 931 mmc_get_blk_desc(mmc)->hwpart = part_num; 932 } 933 934 return ret; 935 } 936 937 #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING) 938 int mmc_hwpart_config(struct mmc *mmc, 939 const struct mmc_hwpart_conf *conf, 940 enum mmc_hwpart_conf_mode mode) 941 { 942 u8 part_attrs = 0; 943 u32 enh_size_mult; 944 u32 enh_start_addr; 945 u32 gp_size_mult[4]; 946 u32 max_enh_size_mult; 947 u32 tot_enh_size_mult = 0; 948 u8 wr_rel_set; 949 int i, pidx, err; 950 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); 951 952 if (mode < MMC_HWPART_CONF_CHECK || mode > MMC_HWPART_CONF_COMPLETE) 953 return -EINVAL; 954 955 if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4_41)) { 956 pr_err("eMMC >= 4.4 required for enhanced user data area\n"); 957 return -EMEDIUMTYPE; 958 } 959 960 if (!(mmc->part_support & PART_SUPPORT)) { 961 pr_err("Card does not support partitioning\n"); 962 return -EMEDIUMTYPE; 963 } 964 965 if (!mmc->hc_wp_grp_size) { 966 pr_err("Card does not define HC WP group size\n"); 967 return -EMEDIUMTYPE; 968 } 969 970 /* check partition alignment and total enhanced size */ 971 if (conf->user.enh_size) { 972 if (conf->user.enh_size % mmc->hc_wp_grp_size || 973 conf->user.enh_start % mmc->hc_wp_grp_size) { 974 pr_err("User data enhanced area not HC WP group " 975 "size aligned\n"); 976 return -EINVAL; 977 } 978 part_attrs |= EXT_CSD_ENH_USR; 979 enh_size_mult = conf->user.enh_size / mmc->hc_wp_grp_size; 980 if (mmc->high_capacity) { 981 enh_start_addr = conf->user.enh_start; 982 } else { 983 enh_start_addr = (conf->user.enh_start << 9); 984 } 985 } else { 986 enh_size_mult = 0; 987 enh_start_addr = 0; 988 } 989 tot_enh_size_mult += enh_size_mult; 990 991 for (pidx = 0; pidx < 4; pidx++) { 992 if (conf->gp_part[pidx].size % mmc->hc_wp_grp_size) { 993 pr_err("GP%i partition not HC WP group size " 994 "aligned\n", pidx+1); 995 return -EINVAL; 996 } 997 gp_size_mult[pidx] = conf->gp_part[pidx].size / mmc->hc_wp_grp_size; 998 if (conf->gp_part[pidx].size && conf->gp_part[pidx].enhanced) { 999 part_attrs |= EXT_CSD_ENH_GP(pidx); 1000 tot_enh_size_mult += gp_size_mult[pidx]; 1001 } 1002 } 1003 1004 if (part_attrs && ! (mmc->part_support & ENHNCD_SUPPORT)) { 1005 pr_err("Card does not support enhanced attribute\n"); 1006 return -EMEDIUMTYPE; 1007 } 1008 1009 err = mmc_send_ext_csd(mmc, ext_csd); 1010 if (err) 1011 return err; 1012 1013 max_enh_size_mult = 1014 (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+2] << 16) + 1015 (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+1] << 8) + 1016 ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT]; 1017 if (tot_enh_size_mult > max_enh_size_mult) { 1018 pr_err("Total enhanced size exceeds maximum (%u > %u)\n", 1019 tot_enh_size_mult, max_enh_size_mult); 1020 return -EMEDIUMTYPE; 1021 } 1022 1023 /* The default value of EXT_CSD_WR_REL_SET is device 1024 * dependent, the values can only be changed if the 1025 * EXT_CSD_HS_CTRL_REL bit is set. The values can be 1026 * changed only once and before partitioning is completed. */ 1027 wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET]; 1028 if (conf->user.wr_rel_change) { 1029 if (conf->user.wr_rel_set) 1030 wr_rel_set |= EXT_CSD_WR_DATA_REL_USR; 1031 else 1032 wr_rel_set &= ~EXT_CSD_WR_DATA_REL_USR; 1033 } 1034 for (pidx = 0; pidx < 4; pidx++) { 1035 if (conf->gp_part[pidx].wr_rel_change) { 1036 if (conf->gp_part[pidx].wr_rel_set) 1037 wr_rel_set |= EXT_CSD_WR_DATA_REL_GP(pidx); 1038 else 1039 wr_rel_set &= ~EXT_CSD_WR_DATA_REL_GP(pidx); 1040 } 1041 } 1042 1043 if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET] && 1044 !(ext_csd[EXT_CSD_WR_REL_PARAM] & EXT_CSD_HS_CTRL_REL)) { 1045 puts("Card does not support host controlled partition write " 1046 "reliability settings\n"); 1047 return -EMEDIUMTYPE; 1048 } 1049 1050 if (ext_csd[EXT_CSD_PARTITION_SETTING] & 1051 EXT_CSD_PARTITION_SETTING_COMPLETED) { 1052 pr_err("Card already partitioned\n"); 1053 return -EPERM; 1054 } 1055 1056 if (mode == MMC_HWPART_CONF_CHECK) 1057 return 0; 1058 1059 /* Partitioning requires high-capacity size definitions */ 1060 if (!(ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01)) { 1061 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1062 EXT_CSD_ERASE_GROUP_DEF, 1); 1063 1064 if (err) 1065 return err; 1066 1067 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1; 1068 1069 /* update erase group size to be high-capacity */ 1070 mmc->erase_grp_size = 1071 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; 1072 1073 } 1074 1075 /* all OK, write the configuration */ 1076 for (i = 0; i < 4; i++) { 1077 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1078 EXT_CSD_ENH_START_ADDR+i, 1079 (enh_start_addr >> (i*8)) & 0xFF); 1080 if (err) 1081 return err; 1082 } 1083 for (i = 0; i < 3; i++) { 1084 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1085 EXT_CSD_ENH_SIZE_MULT+i, 1086 (enh_size_mult >> (i*8)) & 0xFF); 1087 if (err) 1088 return err; 1089 } 1090 for (pidx = 0; pidx < 4; pidx++) { 1091 for (i = 0; i < 3; i++) { 1092 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1093 EXT_CSD_GP_SIZE_MULT+pidx*3+i, 1094 (gp_size_mult[pidx] >> (i*8)) & 0xFF); 1095 if (err) 1096 return err; 1097 } 1098 } 1099 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1100 EXT_CSD_PARTITIONS_ATTRIBUTE, part_attrs); 1101 if (err) 1102 return err; 1103 1104 if (mode == MMC_HWPART_CONF_SET) 1105 return 0; 1106 1107 /* The WR_REL_SET is a write-once register but shall be 1108 * written before setting PART_SETTING_COMPLETED. As it is 1109 * write-once we can only write it when completing the 1110 * partitioning. */ 1111 if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET]) { 1112 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1113 EXT_CSD_WR_REL_SET, wr_rel_set); 1114 if (err) 1115 return err; 1116 } 1117 1118 /* Setting PART_SETTING_COMPLETED confirms the partition 1119 * configuration but it only becomes effective after power 1120 * cycle, so we do not adjust the partition related settings 1121 * in the mmc struct. */ 1122 1123 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1124 EXT_CSD_PARTITION_SETTING, 1125 EXT_CSD_PARTITION_SETTING_COMPLETED); 1126 if (err) 1127 return err; 1128 1129 return 0; 1130 } 1131 #endif 1132 1133 #if !CONFIG_IS_ENABLED(DM_MMC) 1134 int mmc_getcd(struct mmc *mmc) 1135 { 1136 int cd; 1137 1138 cd = board_mmc_getcd(mmc); 1139 1140 if (cd < 0) { 1141 if (mmc->cfg->ops->getcd) 1142 cd = mmc->cfg->ops->getcd(mmc); 1143 else 1144 cd = 1; 1145 } 1146 1147 return cd; 1148 } 1149 #endif 1150 1151 #if !CONFIG_IS_ENABLED(MMC_TINY) 1152 static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp) 1153 { 1154 struct mmc_cmd cmd; 1155 struct mmc_data data; 1156 1157 /* Switch the frequency */ 1158 cmd.cmdidx = SD_CMD_SWITCH_FUNC; 1159 cmd.resp_type = MMC_RSP_R1; 1160 cmd.cmdarg = (mode << 31) | 0xffffff; 1161 cmd.cmdarg &= ~(0xf << (group * 4)); 1162 cmd.cmdarg |= value << (group * 4); 1163 1164 data.dest = (char *)resp; 1165 data.blocksize = 64; 1166 data.blocks = 1; 1167 data.flags = MMC_DATA_READ; 1168 1169 return mmc_send_cmd(mmc, &cmd, &data); 1170 } 1171 1172 static int sd_get_capabilities(struct mmc *mmc) 1173 { 1174 int err; 1175 struct mmc_cmd cmd; 1176 ALLOC_CACHE_ALIGN_BUFFER(__be32, scr, 2); 1177 ALLOC_CACHE_ALIGN_BUFFER(__be32, switch_status, 16); 1178 struct mmc_data data; 1179 int timeout; 1180 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1181 u32 sd3_bus_mode; 1182 #endif 1183 1184 mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(SD_LEGACY); 1185 1186 if (mmc_host_is_spi(mmc)) 1187 return 0; 1188 1189 /* Read the SCR to find out if this card supports higher speeds */ 1190 cmd.cmdidx = MMC_CMD_APP_CMD; 1191 cmd.resp_type = MMC_RSP_R1; 1192 cmd.cmdarg = mmc->rca << 16; 1193 1194 err = mmc_send_cmd(mmc, &cmd, NULL); 1195 1196 if (err) 1197 return err; 1198 1199 cmd.cmdidx = SD_CMD_APP_SEND_SCR; 1200 cmd.resp_type = MMC_RSP_R1; 1201 cmd.cmdarg = 0; 1202 1203 timeout = 3; 1204 1205 retry_scr: 1206 data.dest = (char *)scr; 1207 data.blocksize = 8; 1208 data.blocks = 1; 1209 data.flags = MMC_DATA_READ; 1210 1211 err = mmc_send_cmd(mmc, &cmd, &data); 1212 1213 if (err) { 1214 if (timeout--) 1215 goto retry_scr; 1216 1217 return err; 1218 } 1219 1220 mmc->scr[0] = __be32_to_cpu(scr[0]); 1221 mmc->scr[1] = __be32_to_cpu(scr[1]); 1222 1223 switch ((mmc->scr[0] >> 24) & 0xf) { 1224 case 0: 1225 mmc->version = SD_VERSION_1_0; 1226 break; 1227 case 1: 1228 mmc->version = SD_VERSION_1_10; 1229 break; 1230 case 2: 1231 mmc->version = SD_VERSION_2; 1232 if ((mmc->scr[0] >> 15) & 0x1) 1233 mmc->version = SD_VERSION_3; 1234 break; 1235 default: 1236 mmc->version = SD_VERSION_1_0; 1237 break; 1238 } 1239 1240 if (mmc->scr[0] & SD_DATA_4BIT) 1241 mmc->card_caps |= MMC_MODE_4BIT; 1242 1243 /* Version 1.0 doesn't support switching */ 1244 if (mmc->version == SD_VERSION_1_0) 1245 return 0; 1246 1247 timeout = 4; 1248 while (timeout--) { 1249 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1, 1250 (u8 *)switch_status); 1251 1252 if (err) 1253 return err; 1254 1255 /* The high-speed function is busy. Try again */ 1256 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY)) 1257 break; 1258 } 1259 1260 /* If high-speed isn't supported, we return */ 1261 if (__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED) 1262 mmc->card_caps |= MMC_CAP(SD_HS); 1263 1264 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1265 /* Version before 3.0 don't support UHS modes */ 1266 if (mmc->version < SD_VERSION_3) 1267 return 0; 1268 1269 sd3_bus_mode = __be32_to_cpu(switch_status[3]) >> 16 & 0x1f; 1270 if (sd3_bus_mode & SD_MODE_UHS_SDR104) 1271 mmc->card_caps |= MMC_CAP(UHS_SDR104); 1272 if (sd3_bus_mode & SD_MODE_UHS_SDR50) 1273 mmc->card_caps |= MMC_CAP(UHS_SDR50); 1274 if (sd3_bus_mode & SD_MODE_UHS_SDR25) 1275 mmc->card_caps |= MMC_CAP(UHS_SDR25); 1276 if (sd3_bus_mode & SD_MODE_UHS_SDR12) 1277 mmc->card_caps |= MMC_CAP(UHS_SDR12); 1278 if (sd3_bus_mode & SD_MODE_UHS_DDR50) 1279 mmc->card_caps |= MMC_CAP(UHS_DDR50); 1280 #endif 1281 1282 return 0; 1283 } 1284 1285 static int sd_set_card_speed(struct mmc *mmc, enum bus_mode mode) 1286 { 1287 int err; 1288 1289 ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16); 1290 int speed; 1291 1292 switch (mode) { 1293 case SD_LEGACY: 1294 speed = UHS_SDR12_BUS_SPEED; 1295 break; 1296 case SD_HS: 1297 speed = HIGH_SPEED_BUS_SPEED; 1298 break; 1299 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1300 case UHS_SDR12: 1301 speed = UHS_SDR12_BUS_SPEED; 1302 break; 1303 case UHS_SDR25: 1304 speed = UHS_SDR25_BUS_SPEED; 1305 break; 1306 case UHS_SDR50: 1307 speed = UHS_SDR50_BUS_SPEED; 1308 break; 1309 case UHS_DDR50: 1310 speed = UHS_DDR50_BUS_SPEED; 1311 break; 1312 case UHS_SDR104: 1313 speed = UHS_SDR104_BUS_SPEED; 1314 break; 1315 #endif 1316 default: 1317 return -EINVAL; 1318 } 1319 1320 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, speed, (u8 *)switch_status); 1321 if (err) 1322 return err; 1323 1324 if (((__be32_to_cpu(switch_status[4]) >> 24) & 0xF) != speed) 1325 return -ENOTSUPP; 1326 1327 return 0; 1328 } 1329 1330 static int sd_select_bus_width(struct mmc *mmc, int w) 1331 { 1332 int err; 1333 struct mmc_cmd cmd; 1334 1335 if ((w != 4) && (w != 1)) 1336 return -EINVAL; 1337 1338 cmd.cmdidx = MMC_CMD_APP_CMD; 1339 cmd.resp_type = MMC_RSP_R1; 1340 cmd.cmdarg = mmc->rca << 16; 1341 1342 err = mmc_send_cmd(mmc, &cmd, NULL); 1343 if (err) 1344 return err; 1345 1346 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH; 1347 cmd.resp_type = MMC_RSP_R1; 1348 if (w == 4) 1349 cmd.cmdarg = 2; 1350 else if (w == 1) 1351 cmd.cmdarg = 0; 1352 err = mmc_send_cmd(mmc, &cmd, NULL); 1353 if (err) 1354 return err; 1355 1356 return 0; 1357 } 1358 #endif 1359 1360 #if CONFIG_IS_ENABLED(MMC_WRITE) 1361 static int sd_read_ssr(struct mmc *mmc) 1362 { 1363 static const unsigned int sd_au_size[] = { 1364 0, SZ_16K / 512, SZ_32K / 512, 1365 SZ_64K / 512, SZ_128K / 512, SZ_256K / 512, 1366 SZ_512K / 512, SZ_1M / 512, SZ_2M / 512, 1367 SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, 1368 SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, 1369 SZ_64M / 512, 1370 }; 1371 int err, i; 1372 struct mmc_cmd cmd; 1373 ALLOC_CACHE_ALIGN_BUFFER(uint, ssr, 16); 1374 struct mmc_data data; 1375 int timeout = 3; 1376 unsigned int au, eo, et, es; 1377 1378 cmd.cmdidx = MMC_CMD_APP_CMD; 1379 cmd.resp_type = MMC_RSP_R1; 1380 cmd.cmdarg = mmc->rca << 16; 1381 1382 err = mmc_send_cmd(mmc, &cmd, NULL); 1383 if (err) 1384 return err; 1385 1386 cmd.cmdidx = SD_CMD_APP_SD_STATUS; 1387 cmd.resp_type = MMC_RSP_R1; 1388 cmd.cmdarg = 0; 1389 1390 retry_ssr: 1391 data.dest = (char *)ssr; 1392 data.blocksize = 64; 1393 data.blocks = 1; 1394 data.flags = MMC_DATA_READ; 1395 1396 err = mmc_send_cmd(mmc, &cmd, &data); 1397 if (err) { 1398 if (timeout--) 1399 goto retry_ssr; 1400 1401 return err; 1402 } 1403 1404 for (i = 0; i < 16; i++) 1405 ssr[i] = be32_to_cpu(ssr[i]); 1406 1407 au = (ssr[2] >> 12) & 0xF; 1408 if ((au <= 9) || (mmc->version == SD_VERSION_3)) { 1409 mmc->ssr.au = sd_au_size[au]; 1410 es = (ssr[3] >> 24) & 0xFF; 1411 es |= (ssr[2] & 0xFF) << 8; 1412 et = (ssr[3] >> 18) & 0x3F; 1413 if (es && et) { 1414 eo = (ssr[3] >> 16) & 0x3; 1415 mmc->ssr.erase_timeout = (et * 1000) / es; 1416 mmc->ssr.erase_offset = eo * 1000; 1417 } 1418 } else { 1419 pr_debug("Invalid Allocation Unit Size.\n"); 1420 } 1421 1422 return 0; 1423 } 1424 #endif 1425 /* frequency bases */ 1426 /* divided by 10 to be nice to platforms without floating point */ 1427 static const int fbase[] = { 1428 10000, 1429 100000, 1430 1000000, 1431 10000000, 1432 }; 1433 1434 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice 1435 * to platforms without floating point. 1436 */ 1437 static const u8 multipliers[] = { 1438 0, /* reserved */ 1439 10, 1440 12, 1441 13, 1442 15, 1443 20, 1444 25, 1445 30, 1446 35, 1447 40, 1448 45, 1449 50, 1450 55, 1451 60, 1452 70, 1453 80, 1454 }; 1455 1456 static inline int bus_width(uint cap) 1457 { 1458 if (cap == MMC_MODE_8BIT) 1459 return 8; 1460 if (cap == MMC_MODE_4BIT) 1461 return 4; 1462 if (cap == MMC_MODE_1BIT) 1463 return 1; 1464 pr_warn("invalid bus witdh capability 0x%x\n", cap); 1465 return 0; 1466 } 1467 1468 #if !CONFIG_IS_ENABLED(DM_MMC) 1469 #ifdef MMC_SUPPORTS_TUNING 1470 static int mmc_execute_tuning(struct mmc *mmc, uint opcode) 1471 { 1472 return -ENOTSUPP; 1473 } 1474 #endif 1475 1476 static void mmc_send_init_stream(struct mmc *mmc) 1477 { 1478 } 1479 1480 static int mmc_set_ios(struct mmc *mmc) 1481 { 1482 int ret = 0; 1483 1484 if (mmc->cfg->ops->set_ios) 1485 ret = mmc->cfg->ops->set_ios(mmc); 1486 1487 return ret; 1488 } 1489 #endif 1490 1491 int mmc_set_clock(struct mmc *mmc, uint clock, bool disable) 1492 { 1493 if (!disable) { 1494 if (clock > mmc->cfg->f_max) 1495 clock = mmc->cfg->f_max; 1496 1497 if (clock < mmc->cfg->f_min) 1498 clock = mmc->cfg->f_min; 1499 } 1500 1501 mmc->clock = clock; 1502 mmc->clk_disable = disable; 1503 1504 debug("clock is %s (%dHz)\n", disable ? "disabled" : "enabled", clock); 1505 1506 return mmc_set_ios(mmc); 1507 } 1508 1509 static int mmc_set_bus_width(struct mmc *mmc, uint width) 1510 { 1511 mmc->bus_width = width; 1512 1513 return mmc_set_ios(mmc); 1514 } 1515 1516 #if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG) 1517 /* 1518 * helper function to display the capabilities in a human 1519 * friendly manner. The capabilities include bus width and 1520 * supported modes. 1521 */ 1522 void mmc_dump_capabilities(const char *text, uint caps) 1523 { 1524 enum bus_mode mode; 1525 1526 pr_debug("%s: widths [", text); 1527 if (caps & MMC_MODE_8BIT) 1528 pr_debug("8, "); 1529 if (caps & MMC_MODE_4BIT) 1530 pr_debug("4, "); 1531 if (caps & MMC_MODE_1BIT) 1532 pr_debug("1, "); 1533 pr_debug("\b\b] modes ["); 1534 for (mode = MMC_LEGACY; mode < MMC_MODES_END; mode++) 1535 if (MMC_CAP(mode) & caps) 1536 pr_debug("%s, ", mmc_mode_name(mode)); 1537 pr_debug("\b\b]\n"); 1538 } 1539 #endif 1540 1541 struct mode_width_tuning { 1542 enum bus_mode mode; 1543 uint widths; 1544 #ifdef MMC_SUPPORTS_TUNING 1545 uint tuning; 1546 #endif 1547 }; 1548 1549 #if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE) 1550 int mmc_voltage_to_mv(enum mmc_voltage voltage) 1551 { 1552 switch (voltage) { 1553 case MMC_SIGNAL_VOLTAGE_000: return 0; 1554 case MMC_SIGNAL_VOLTAGE_330: return 3300; 1555 case MMC_SIGNAL_VOLTAGE_180: return 1800; 1556 case MMC_SIGNAL_VOLTAGE_120: return 1200; 1557 } 1558 return -EINVAL; 1559 } 1560 1561 static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage) 1562 { 1563 int err; 1564 1565 if (mmc->signal_voltage == signal_voltage) 1566 return 0; 1567 1568 mmc->signal_voltage = signal_voltage; 1569 err = mmc_set_ios(mmc); 1570 if (err) 1571 pr_debug("unable to set voltage (err %d)\n", err); 1572 1573 return err; 1574 } 1575 #else 1576 static inline int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage) 1577 { 1578 return 0; 1579 } 1580 #endif 1581 1582 #if !CONFIG_IS_ENABLED(MMC_TINY) 1583 static const struct mode_width_tuning sd_modes_by_pref[] = { 1584 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1585 #ifdef MMC_SUPPORTS_TUNING 1586 { 1587 .mode = UHS_SDR104, 1588 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1589 .tuning = MMC_CMD_SEND_TUNING_BLOCK 1590 }, 1591 #endif 1592 { 1593 .mode = UHS_SDR50, 1594 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1595 }, 1596 { 1597 .mode = UHS_DDR50, 1598 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1599 }, 1600 { 1601 .mode = UHS_SDR25, 1602 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1603 }, 1604 #endif 1605 { 1606 .mode = SD_HS, 1607 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1608 }, 1609 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1610 { 1611 .mode = UHS_SDR12, 1612 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1613 }, 1614 #endif 1615 { 1616 .mode = SD_LEGACY, 1617 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT, 1618 } 1619 }; 1620 1621 #define for_each_sd_mode_by_pref(caps, mwt) \ 1622 for (mwt = sd_modes_by_pref;\ 1623 mwt < sd_modes_by_pref + ARRAY_SIZE(sd_modes_by_pref);\ 1624 mwt++) \ 1625 if (caps & MMC_CAP(mwt->mode)) 1626 1627 static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps) 1628 { 1629 int err; 1630 uint widths[] = {MMC_MODE_4BIT, MMC_MODE_1BIT}; 1631 const struct mode_width_tuning *mwt; 1632 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) 1633 bool uhs_en = (mmc->ocr & OCR_S18R) ? true : false; 1634 #else 1635 bool uhs_en = false; 1636 #endif 1637 uint caps; 1638 1639 #ifdef DEBUG 1640 mmc_dump_capabilities("sd card", card_caps); 1641 mmc_dump_capabilities("host", mmc->host_caps); 1642 #endif 1643 1644 /* Restrict card's capabilities by what the host can do */ 1645 caps = card_caps & mmc->host_caps; 1646 1647 if (!uhs_en) 1648 caps &= ~UHS_CAPS; 1649 1650 for_each_sd_mode_by_pref(caps, mwt) { 1651 uint *w; 1652 1653 for (w = widths; w < widths + ARRAY_SIZE(widths); w++) { 1654 if (*w & caps & mwt->widths) { 1655 pr_debug("trying mode %s width %d (at %d MHz)\n", 1656 mmc_mode_name(mwt->mode), 1657 bus_width(*w), 1658 mmc_mode2freq(mmc, mwt->mode) / 1000000); 1659 1660 /* configure the bus width (card + host) */ 1661 err = sd_select_bus_width(mmc, bus_width(*w)); 1662 if (err) 1663 goto error; 1664 mmc_set_bus_width(mmc, bus_width(*w)); 1665 1666 /* configure the bus mode (card) */ 1667 err = sd_set_card_speed(mmc, mwt->mode); 1668 if (err) 1669 goto error; 1670 1671 /* configure the bus mode (host) */ 1672 mmc_select_mode(mmc, mwt->mode); 1673 mmc_set_clock(mmc, mmc->tran_speed, 1674 MMC_CLK_ENABLE); 1675 1676 #ifdef MMC_SUPPORTS_TUNING 1677 /* execute tuning if needed */ 1678 if (mwt->tuning && !mmc_host_is_spi(mmc)) { 1679 err = mmc_execute_tuning(mmc, 1680 mwt->tuning); 1681 if (err) { 1682 pr_debug("tuning failed\n"); 1683 goto error; 1684 } 1685 } 1686 #endif 1687 1688 #if CONFIG_IS_ENABLED(MMC_WRITE) 1689 err = sd_read_ssr(mmc); 1690 if (err) 1691 pr_warn("unable to read ssr\n"); 1692 #endif 1693 if (!err) 1694 return 0; 1695 1696 error: 1697 /* revert to a safer bus speed */ 1698 mmc_select_mode(mmc, SD_LEGACY); 1699 mmc_set_clock(mmc, mmc->tran_speed, 1700 MMC_CLK_ENABLE); 1701 } 1702 } 1703 } 1704 1705 pr_err("unable to select a mode\n"); 1706 return -ENOTSUPP; 1707 } 1708 1709 /* 1710 * read the compare the part of ext csd that is constant. 1711 * This can be used to check that the transfer is working 1712 * as expected. 1713 */ 1714 static int mmc_read_and_compare_ext_csd(struct mmc *mmc) 1715 { 1716 int err; 1717 const u8 *ext_csd = mmc->ext_csd; 1718 ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); 1719 1720 if (mmc->version < MMC_VERSION_4) 1721 return 0; 1722 1723 err = mmc_send_ext_csd(mmc, test_csd); 1724 if (err) 1725 return err; 1726 1727 /* Only compare read only fields */ 1728 if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] 1729 == test_csd[EXT_CSD_PARTITIONING_SUPPORT] && 1730 ext_csd[EXT_CSD_HC_WP_GRP_SIZE] 1731 == test_csd[EXT_CSD_HC_WP_GRP_SIZE] && 1732 ext_csd[EXT_CSD_REV] 1733 == test_csd[EXT_CSD_REV] && 1734 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] 1735 == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE] && 1736 memcmp(&ext_csd[EXT_CSD_SEC_CNT], 1737 &test_csd[EXT_CSD_SEC_CNT], 4) == 0) 1738 return 0; 1739 1740 return -EBADMSG; 1741 } 1742 1743 #if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE) 1744 static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode, 1745 uint32_t allowed_mask) 1746 { 1747 u32 card_mask = 0; 1748 1749 switch (mode) { 1750 case MMC_HS_400: 1751 case MMC_HS_200: 1752 if (mmc->cardtype & (EXT_CSD_CARD_TYPE_HS200_1_8V | 1753 EXT_CSD_CARD_TYPE_HS400_1_8V)) 1754 card_mask |= MMC_SIGNAL_VOLTAGE_180; 1755 if (mmc->cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V | 1756 EXT_CSD_CARD_TYPE_HS400_1_2V)) 1757 card_mask |= MMC_SIGNAL_VOLTAGE_120; 1758 break; 1759 case MMC_DDR_52: 1760 if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_8V) 1761 card_mask |= MMC_SIGNAL_VOLTAGE_330 | 1762 MMC_SIGNAL_VOLTAGE_180; 1763 if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_2V) 1764 card_mask |= MMC_SIGNAL_VOLTAGE_120; 1765 break; 1766 default: 1767 card_mask |= MMC_SIGNAL_VOLTAGE_330; 1768 break; 1769 } 1770 1771 while (card_mask & allowed_mask) { 1772 enum mmc_voltage best_match; 1773 1774 best_match = 1 << (ffs(card_mask & allowed_mask) - 1); 1775 if (!mmc_set_signal_voltage(mmc, best_match)) 1776 return 0; 1777 1778 allowed_mask &= ~best_match; 1779 } 1780 1781 return -ENOTSUPP; 1782 } 1783 #else 1784 static inline int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode, 1785 uint32_t allowed_mask) 1786 { 1787 return 0; 1788 } 1789 #endif 1790 1791 static const struct mode_width_tuning mmc_modes_by_pref[] = { 1792 #if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) 1793 { 1794 .mode = MMC_HS_400, 1795 .widths = MMC_MODE_8BIT, 1796 .tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200 1797 }, 1798 #endif 1799 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) 1800 { 1801 .mode = MMC_HS_200, 1802 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT, 1803 .tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200 1804 }, 1805 #endif 1806 { 1807 .mode = MMC_DDR_52, 1808 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT, 1809 }, 1810 { 1811 .mode = MMC_HS_52, 1812 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT, 1813 }, 1814 { 1815 .mode = MMC_HS, 1816 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT, 1817 }, 1818 { 1819 .mode = MMC_LEGACY, 1820 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT, 1821 } 1822 }; 1823 1824 #define for_each_mmc_mode_by_pref(caps, mwt) \ 1825 for (mwt = mmc_modes_by_pref;\ 1826 mwt < mmc_modes_by_pref + ARRAY_SIZE(mmc_modes_by_pref);\ 1827 mwt++) \ 1828 if (caps & MMC_CAP(mwt->mode)) 1829 1830 static const struct ext_csd_bus_width { 1831 uint cap; 1832 bool is_ddr; 1833 uint ext_csd_bits; 1834 } ext_csd_bus_width[] = { 1835 {MMC_MODE_8BIT, true, EXT_CSD_DDR_BUS_WIDTH_8}, 1836 {MMC_MODE_4BIT, true, EXT_CSD_DDR_BUS_WIDTH_4}, 1837 {MMC_MODE_8BIT, false, EXT_CSD_BUS_WIDTH_8}, 1838 {MMC_MODE_4BIT, false, EXT_CSD_BUS_WIDTH_4}, 1839 {MMC_MODE_1BIT, false, EXT_CSD_BUS_WIDTH_1}, 1840 }; 1841 1842 #if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) 1843 static int mmc_select_hs400(struct mmc *mmc) 1844 { 1845 int err; 1846 1847 /* Set timing to HS200 for tuning */ 1848 err = mmc_set_card_speed(mmc, MMC_HS_200); 1849 if (err) 1850 return err; 1851 1852 /* configure the bus mode (host) */ 1853 mmc_select_mode(mmc, MMC_HS_200); 1854 mmc_set_clock(mmc, mmc->tran_speed, false); 1855 1856 /* execute tuning if needed */ 1857 err = mmc_execute_tuning(mmc, MMC_CMD_SEND_TUNING_BLOCK_HS200); 1858 if (err) { 1859 debug("tuning failed\n"); 1860 return err; 1861 } 1862 1863 /* Set back to HS */ 1864 mmc_set_card_speed(mmc, MMC_HS); 1865 mmc_set_clock(mmc, mmc_mode2freq(mmc, MMC_HS), false); 1866 1867 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 1868 EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_FLAG); 1869 if (err) 1870 return err; 1871 1872 err = mmc_set_card_speed(mmc, MMC_HS_400); 1873 if (err) 1874 return err; 1875 1876 mmc_select_mode(mmc, MMC_HS_400); 1877 err = mmc_set_clock(mmc, mmc->tran_speed, false); 1878 if (err) 1879 return err; 1880 1881 return 0; 1882 } 1883 #else 1884 static int mmc_select_hs400(struct mmc *mmc) 1885 { 1886 return -ENOTSUPP; 1887 } 1888 #endif 1889 1890 #define for_each_supported_width(caps, ddr, ecbv) \ 1891 for (ecbv = ext_csd_bus_width;\ 1892 ecbv < ext_csd_bus_width + ARRAY_SIZE(ext_csd_bus_width);\ 1893 ecbv++) \ 1894 if ((ddr == ecbv->is_ddr) && (caps & ecbv->cap)) 1895 1896 static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps) 1897 { 1898 int err; 1899 const struct mode_width_tuning *mwt; 1900 const struct ext_csd_bus_width *ecbw; 1901 1902 #ifdef DEBUG 1903 mmc_dump_capabilities("mmc", card_caps); 1904 mmc_dump_capabilities("host", mmc->host_caps); 1905 #endif 1906 1907 /* Restrict card's capabilities by what the host can do */ 1908 card_caps &= mmc->host_caps; 1909 1910 /* Only version 4 of MMC supports wider bus widths */ 1911 if (mmc->version < MMC_VERSION_4) 1912 return 0; 1913 1914 if (!mmc->ext_csd) { 1915 pr_debug("No ext_csd found!\n"); /* this should enver happen */ 1916 return -ENOTSUPP; 1917 } 1918 1919 mmc_set_clock(mmc, mmc->legacy_speed, MMC_CLK_ENABLE); 1920 1921 for_each_mmc_mode_by_pref(card_caps, mwt) { 1922 for_each_supported_width(card_caps & mwt->widths, 1923 mmc_is_mode_ddr(mwt->mode), ecbw) { 1924 enum mmc_voltage old_voltage; 1925 pr_debug("trying mode %s width %d (at %d MHz)\n", 1926 mmc_mode_name(mwt->mode), 1927 bus_width(ecbw->cap), 1928 mmc_mode2freq(mmc, mwt->mode) / 1000000); 1929 old_voltage = mmc->signal_voltage; 1930 err = mmc_set_lowest_voltage(mmc, mwt->mode, 1931 MMC_ALL_SIGNAL_VOLTAGE); 1932 if (err) 1933 continue; 1934 1935 /* configure the bus width (card + host) */ 1936 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1937 EXT_CSD_BUS_WIDTH, 1938 ecbw->ext_csd_bits & ~EXT_CSD_DDR_FLAG); 1939 if (err) 1940 goto error; 1941 mmc_set_bus_width(mmc, bus_width(ecbw->cap)); 1942 1943 if (mwt->mode == MMC_HS_400) { 1944 err = mmc_select_hs400(mmc); 1945 if (err) { 1946 printf("Select HS400 failed %d\n", err); 1947 goto error; 1948 } 1949 } else { 1950 /* configure the bus speed (card) */ 1951 err = mmc_set_card_speed(mmc, mwt->mode); 1952 if (err) 1953 goto error; 1954 1955 /* 1956 * configure the bus width AND the ddr mode 1957 * (card). The host side will be taken care 1958 * of in the next step 1959 */ 1960 if (ecbw->ext_csd_bits & EXT_CSD_DDR_FLAG) { 1961 err = mmc_switch(mmc, 1962 EXT_CSD_CMD_SET_NORMAL, 1963 EXT_CSD_BUS_WIDTH, 1964 ecbw->ext_csd_bits); 1965 if (err) 1966 goto error; 1967 } 1968 1969 /* configure the bus mode (host) */ 1970 mmc_select_mode(mmc, mwt->mode); 1971 mmc_set_clock(mmc, mmc->tran_speed, 1972 MMC_CLK_ENABLE); 1973 #ifdef MMC_SUPPORTS_TUNING 1974 1975 /* execute tuning if needed */ 1976 if (mwt->tuning) { 1977 err = mmc_execute_tuning(mmc, 1978 mwt->tuning); 1979 if (err) { 1980 pr_debug("tuning failed\n"); 1981 goto error; 1982 } 1983 } 1984 #endif 1985 } 1986 1987 /* do a transfer to check the configuration */ 1988 err = mmc_read_and_compare_ext_csd(mmc); 1989 if (!err) 1990 return 0; 1991 error: 1992 mmc_set_signal_voltage(mmc, old_voltage); 1993 /* if an error occured, revert to a safer bus mode */ 1994 mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 1995 EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_1); 1996 mmc_select_mode(mmc, MMC_LEGACY); 1997 mmc_set_bus_width(mmc, 1); 1998 } 1999 } 2000 2001 pr_err("unable to select a mode\n"); 2002 2003 return -ENOTSUPP; 2004 } 2005 #endif 2006 2007 #if CONFIG_IS_ENABLED(MMC_TINY) 2008 DEFINE_CACHE_ALIGN_BUFFER(u8, ext_csd_bkup, MMC_MAX_BLOCK_LEN); 2009 #endif 2010 2011 static int mmc_startup_v4(struct mmc *mmc) 2012 { 2013 int err, i; 2014 u64 capacity; 2015 bool has_parts = false; 2016 bool part_completed; 2017 static const u32 mmc_versions[] = { 2018 MMC_VERSION_4, 2019 MMC_VERSION_4_1, 2020 MMC_VERSION_4_2, 2021 MMC_VERSION_4_3, 2022 MMC_VERSION_4_4, 2023 MMC_VERSION_4_41, 2024 MMC_VERSION_4_5, 2025 MMC_VERSION_5_0, 2026 MMC_VERSION_5_1 2027 }; 2028 2029 #if CONFIG_IS_ENABLED(MMC_TINY) 2030 u8 *ext_csd = ext_csd_bkup; 2031 2032 if (IS_SD(mmc) || mmc->version < MMC_VERSION_4) 2033 return 0; 2034 2035 if (!mmc->ext_csd) 2036 memset(ext_csd_bkup, 0, sizeof(ext_csd_bkup)); 2037 2038 err = mmc_send_ext_csd(mmc, ext_csd); 2039 if (err) 2040 goto error; 2041 2042 /* store the ext csd for future reference */ 2043 if (!mmc->ext_csd) 2044 mmc->ext_csd = ext_csd; 2045 #else 2046 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); 2047 2048 if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4)) 2049 return 0; 2050 2051 /* check ext_csd version and capacity */ 2052 err = mmc_send_ext_csd(mmc, ext_csd); 2053 if (err) 2054 goto error; 2055 2056 /* store the ext csd for future reference */ 2057 if (!mmc->ext_csd) 2058 mmc->ext_csd = malloc(MMC_MAX_BLOCK_LEN); 2059 if (!mmc->ext_csd) 2060 return -ENOMEM; 2061 memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN); 2062 #endif 2063 if (ext_csd[EXT_CSD_REV] >= ARRAY_SIZE(mmc_versions)) 2064 return -EINVAL; 2065 2066 mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]]; 2067 2068 if (mmc->version >= MMC_VERSION_4_2) { 2069 /* 2070 * According to the JEDEC Standard, the value of 2071 * ext_csd's capacity is valid if the value is more 2072 * than 2GB 2073 */ 2074 capacity = ext_csd[EXT_CSD_SEC_CNT] << 0 2075 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 2076 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 2077 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2078 capacity *= MMC_MAX_BLOCK_LEN; 2079 if ((capacity >> 20) > 2 * 1024) 2080 mmc->capacity_user = capacity; 2081 } 2082 2083 /* The partition data may be non-zero but it is only 2084 * effective if PARTITION_SETTING_COMPLETED is set in 2085 * EXT_CSD, so ignore any data if this bit is not set, 2086 * except for enabling the high-capacity group size 2087 * definition (see below). 2088 */ 2089 part_completed = !!(ext_csd[EXT_CSD_PARTITION_SETTING] & 2090 EXT_CSD_PARTITION_SETTING_COMPLETED); 2091 2092 /* store the partition info of emmc */ 2093 mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT]; 2094 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || 2095 ext_csd[EXT_CSD_BOOT_MULT]) 2096 mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; 2097 if (part_completed && 2098 (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT)) 2099 mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE]; 2100 2101 mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; 2102 2103 mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17; 2104 2105 for (i = 0; i < 4; i++) { 2106 int idx = EXT_CSD_GP_SIZE_MULT + i * 3; 2107 uint mult = (ext_csd[idx + 2] << 16) + 2108 (ext_csd[idx + 1] << 8) + ext_csd[idx]; 2109 if (mult) 2110 has_parts = true; 2111 if (!part_completed) 2112 continue; 2113 mmc->capacity_gp[i] = mult; 2114 mmc->capacity_gp[i] *= 2115 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 2116 mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 2117 mmc->capacity_gp[i] <<= 19; 2118 } 2119 2120 #ifndef CONFIG_SPL_BUILD 2121 if (part_completed) { 2122 mmc->enh_user_size = 2123 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16) + 2124 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) + 2125 ext_csd[EXT_CSD_ENH_SIZE_MULT]; 2126 mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 2127 mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 2128 mmc->enh_user_size <<= 19; 2129 mmc->enh_user_start = 2130 (ext_csd[EXT_CSD_ENH_START_ADDR + 3] << 24) + 2131 (ext_csd[EXT_CSD_ENH_START_ADDR + 2] << 16) + 2132 (ext_csd[EXT_CSD_ENH_START_ADDR + 1] << 8) + 2133 ext_csd[EXT_CSD_ENH_START_ADDR]; 2134 if (mmc->high_capacity) 2135 mmc->enh_user_start <<= 9; 2136 } 2137 #endif 2138 2139 /* 2140 * Host needs to enable ERASE_GRP_DEF bit if device is 2141 * partitioned. This bit will be lost every time after a reset 2142 * or power off. This will affect erase size. 2143 */ 2144 if (part_completed) 2145 has_parts = true; 2146 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) && 2147 (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) 2148 has_parts = true; 2149 if (has_parts) { 2150 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, 2151 EXT_CSD_ERASE_GROUP_DEF, 1); 2152 2153 if (err) 2154 goto error; 2155 2156 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1; 2157 } 2158 2159 if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) { 2160 #if CONFIG_IS_ENABLED(MMC_WRITE) 2161 /* Read out group size from ext_csd */ 2162 mmc->erase_grp_size = 2163 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; 2164 #endif 2165 /* 2166 * if high capacity and partition setting completed 2167 * SEC_COUNT is valid even if it is smaller than 2 GiB 2168 * JEDEC Standard JESD84-B45, 6.2.4 2169 */ 2170 if (mmc->high_capacity && part_completed) { 2171 capacity = (ext_csd[EXT_CSD_SEC_CNT]) | 2172 (ext_csd[EXT_CSD_SEC_CNT + 1] << 8) | 2173 (ext_csd[EXT_CSD_SEC_CNT + 2] << 16) | 2174 (ext_csd[EXT_CSD_SEC_CNT + 3] << 24); 2175 capacity *= MMC_MAX_BLOCK_LEN; 2176 mmc->capacity_user = capacity; 2177 } 2178 } 2179 #if CONFIG_IS_ENABLED(MMC_WRITE) 2180 else { 2181 /* Calculate the group size from the csd value. */ 2182 int erase_gsz, erase_gmul; 2183 2184 erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10; 2185 erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5; 2186 mmc->erase_grp_size = (erase_gsz + 1) 2187 * (erase_gmul + 1); 2188 } 2189 #endif 2190 #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING) 2191 mmc->hc_wp_grp_size = 1024 2192 * ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] 2193 * ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 2194 #endif 2195 2196 mmc->wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET]; 2197 2198 return 0; 2199 error: 2200 if (mmc->ext_csd) { 2201 #if !CONFIG_IS_ENABLED(MMC_TINY) 2202 free(mmc->ext_csd); 2203 #endif 2204 mmc->ext_csd = NULL; 2205 } 2206 return err; 2207 } 2208 2209 static int mmc_startup(struct mmc *mmc) 2210 { 2211 int err, i; 2212 uint mult, freq; 2213 u64 cmult, csize; 2214 struct mmc_cmd cmd; 2215 struct blk_desc *bdesc; 2216 2217 #ifdef CONFIG_MMC_SPI_CRC_ON 2218 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */ 2219 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF; 2220 cmd.resp_type = MMC_RSP_R1; 2221 cmd.cmdarg = 1; 2222 err = mmc_send_cmd(mmc, &cmd, NULL); 2223 if (err) 2224 return err; 2225 } 2226 #endif 2227 2228 /* Put the Card in Identify Mode */ 2229 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID : 2230 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */ 2231 cmd.resp_type = MMC_RSP_R2; 2232 cmd.cmdarg = 0; 2233 2234 err = mmc_send_cmd(mmc, &cmd, NULL); 2235 2236 #ifdef CONFIG_MMC_QUIRKS 2237 if (err && (mmc->quirks & MMC_QUIRK_RETRY_SEND_CID)) { 2238 int retries = 4; 2239 /* 2240 * It has been seen that SEND_CID may fail on the first 2241 * attempt, let's try a few more time 2242 */ 2243 do { 2244 err = mmc_send_cmd(mmc, &cmd, NULL); 2245 if (!err) 2246 break; 2247 } while (retries--); 2248 } 2249 #endif 2250 2251 if (err) 2252 return err; 2253 2254 memcpy(mmc->cid, cmd.response, 16); 2255 2256 /* 2257 * For MMC cards, set the Relative Address. 2258 * For SD cards, get the Relatvie Address. 2259 * This also puts the cards into Standby State 2260 */ 2261 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */ 2262 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR; 2263 cmd.cmdarg = mmc->rca << 16; 2264 cmd.resp_type = MMC_RSP_R6; 2265 2266 err = mmc_send_cmd(mmc, &cmd, NULL); 2267 2268 if (err) 2269 return err; 2270 2271 if (IS_SD(mmc)) 2272 mmc->rca = (cmd.response[0] >> 16) & 0xffff; 2273 } 2274 2275 /* Get the Card-Specific Data */ 2276 cmd.cmdidx = MMC_CMD_SEND_CSD; 2277 cmd.resp_type = MMC_RSP_R2; 2278 cmd.cmdarg = mmc->rca << 16; 2279 2280 err = mmc_send_cmd(mmc, &cmd, NULL); 2281 2282 if (err) 2283 return err; 2284 2285 mmc->csd[0] = cmd.response[0]; 2286 mmc->csd[1] = cmd.response[1]; 2287 mmc->csd[2] = cmd.response[2]; 2288 mmc->csd[3] = cmd.response[3]; 2289 2290 if (mmc->version == MMC_VERSION_UNKNOWN) { 2291 int version = (cmd.response[0] >> 26) & 0xf; 2292 2293 switch (version) { 2294 case 0: 2295 mmc->version = MMC_VERSION_1_2; 2296 break; 2297 case 1: 2298 mmc->version = MMC_VERSION_1_4; 2299 break; 2300 case 2: 2301 mmc->version = MMC_VERSION_2_2; 2302 break; 2303 case 3: 2304 mmc->version = MMC_VERSION_3; 2305 break; 2306 case 4: 2307 mmc->version = MMC_VERSION_4; 2308 break; 2309 default: 2310 mmc->version = MMC_VERSION_1_2; 2311 break; 2312 } 2313 } 2314 2315 /* divide frequency by 10, since the mults are 10x bigger */ 2316 freq = fbase[(cmd.response[0] & 0x7)]; 2317 mult = multipliers[((cmd.response[0] >> 3) & 0xf)]; 2318 2319 mmc->legacy_speed = freq * mult; 2320 mmc_select_mode(mmc, MMC_LEGACY); 2321 2322 mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1); 2323 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf); 2324 #if CONFIG_IS_ENABLED(MMC_WRITE) 2325 2326 if (IS_SD(mmc)) 2327 mmc->write_bl_len = mmc->read_bl_len; 2328 else 2329 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf); 2330 #endif 2331 2332 if (mmc->high_capacity) { 2333 csize = (mmc->csd[1] & 0x3f) << 16 2334 | (mmc->csd[2] & 0xffff0000) >> 16; 2335 cmult = 8; 2336 } else { 2337 csize = (mmc->csd[1] & 0x3ff) << 2 2338 | (mmc->csd[2] & 0xc0000000) >> 30; 2339 cmult = (mmc->csd[2] & 0x00038000) >> 15; 2340 } 2341 2342 mmc->capacity_user = (csize + 1) << (cmult + 2); 2343 mmc->capacity_user *= mmc->read_bl_len; 2344 mmc->capacity_boot = 0; 2345 mmc->capacity_rpmb = 0; 2346 for (i = 0; i < 4; i++) 2347 mmc->capacity_gp[i] = 0; 2348 2349 if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN) 2350 mmc->read_bl_len = MMC_MAX_BLOCK_LEN; 2351 2352 #if CONFIG_IS_ENABLED(MMC_WRITE) 2353 if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN) 2354 mmc->write_bl_len = MMC_MAX_BLOCK_LEN; 2355 #endif 2356 2357 if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) { 2358 cmd.cmdidx = MMC_CMD_SET_DSR; 2359 cmd.cmdarg = (mmc->dsr & 0xffff) << 16; 2360 cmd.resp_type = MMC_RSP_NONE; 2361 if (mmc_send_cmd(mmc, &cmd, NULL)) 2362 pr_warn("MMC: SET_DSR failed\n"); 2363 } 2364 2365 /* Select the card, and put it into Transfer Mode */ 2366 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */ 2367 cmd.cmdidx = MMC_CMD_SELECT_CARD; 2368 cmd.resp_type = MMC_RSP_R1; 2369 cmd.cmdarg = mmc->rca << 16; 2370 err = mmc_send_cmd(mmc, &cmd, NULL); 2371 2372 if (err) 2373 return err; 2374 } 2375 2376 /* 2377 * For SD, its erase group is always one sector 2378 */ 2379 #if CONFIG_IS_ENABLED(MMC_WRITE) 2380 mmc->erase_grp_size = 1; 2381 #endif 2382 mmc->part_config = MMCPART_NOAVAILABLE; 2383 2384 err = mmc_startup_v4(mmc); 2385 if (err) 2386 return err; 2387 2388 err = mmc_set_capacity(mmc, mmc_get_blk_desc(mmc)->hwpart); 2389 if (err) 2390 return err; 2391 2392 #if CONFIG_IS_ENABLED(MMC_TINY) 2393 mmc_set_clock(mmc, mmc->legacy_speed, false); 2394 mmc_select_mode(mmc, IS_SD(mmc) ? SD_LEGACY : MMC_LEGACY); 2395 mmc_set_bus_width(mmc, 1); 2396 #else 2397 if (IS_SD(mmc)) { 2398 err = sd_get_capabilities(mmc); 2399 if (err) 2400 return err; 2401 err = sd_select_mode_and_width(mmc, mmc->card_caps); 2402 } else { 2403 err = mmc_get_capabilities(mmc); 2404 if (err) 2405 return err; 2406 mmc_select_mode_and_width(mmc, mmc->card_caps); 2407 } 2408 #endif 2409 if (err) 2410 return err; 2411 2412 mmc->best_mode = mmc->selected_mode; 2413 2414 /* Fix the block length for DDR mode */ 2415 if (mmc->ddr_mode) { 2416 mmc->read_bl_len = MMC_MAX_BLOCK_LEN; 2417 #if CONFIG_IS_ENABLED(MMC_WRITE) 2418 mmc->write_bl_len = MMC_MAX_BLOCK_LEN; 2419 #endif 2420 } 2421 2422 /* fill in device description */ 2423 bdesc = mmc_get_blk_desc(mmc); 2424 bdesc->lun = 0; 2425 bdesc->hwpart = 0; 2426 bdesc->type = 0; 2427 bdesc->blksz = mmc->read_bl_len; 2428 bdesc->log2blksz = LOG2(bdesc->blksz); 2429 bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len); 2430 #if !defined(CONFIG_SPL_BUILD) || \ 2431 (defined(CONFIG_SPL_LIBCOMMON_SUPPORT) && \ 2432 !defined(CONFIG_USE_TINY_PRINTF)) 2433 sprintf(bdesc->vendor, "Man %06x Snr %04x%04x", 2434 mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff), 2435 (mmc->cid[3] >> 16) & 0xffff); 2436 sprintf(bdesc->product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff, 2437 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff, 2438 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff, 2439 (mmc->cid[2] >> 24) & 0xff); 2440 sprintf(bdesc->revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf, 2441 (mmc->cid[2] >> 16) & 0xf); 2442 #else 2443 bdesc->vendor[0] = 0; 2444 bdesc->product[0] = 0; 2445 bdesc->revision[0] = 0; 2446 #endif 2447 2448 return 0; 2449 } 2450 2451 static int mmc_send_if_cond(struct mmc *mmc) 2452 { 2453 struct mmc_cmd cmd; 2454 int err; 2455 2456 cmd.cmdidx = SD_CMD_SEND_IF_COND; 2457 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */ 2458 cmd.cmdarg = ((mmc->cfg->voltages & 0xff8000) != 0) << 8 | 0xaa; 2459 cmd.resp_type = MMC_RSP_R7; 2460 2461 err = mmc_send_cmd(mmc, &cmd, NULL); 2462 2463 if (err) 2464 return err; 2465 2466 if ((cmd.response[0] & 0xff) != 0xaa) 2467 return -EOPNOTSUPP; 2468 else 2469 mmc->version = SD_VERSION_2; 2470 2471 return 0; 2472 } 2473 2474 #if !CONFIG_IS_ENABLED(DM_MMC) 2475 /* board-specific MMC power initializations. */ 2476 __weak void board_mmc_power_init(void) 2477 { 2478 } 2479 #endif 2480 2481 static int mmc_power_init(struct mmc *mmc) 2482 { 2483 #if CONFIG_IS_ENABLED(DM_MMC) 2484 #if CONFIG_IS_ENABLED(DM_REGULATOR) 2485 int ret; 2486 2487 ret = device_get_supply_regulator(mmc->dev, "vmmc-supply", 2488 &mmc->vmmc_supply); 2489 if (ret) 2490 pr_debug("%s: No vmmc supply\n", mmc->dev->name); 2491 2492 ret = device_get_supply_regulator(mmc->dev, "vqmmc-supply", 2493 &mmc->vqmmc_supply); 2494 if (ret) 2495 pr_debug("%s: No vqmmc supply\n", mmc->dev->name); 2496 #endif 2497 #else /* !CONFIG_DM_MMC */ 2498 /* 2499 * Driver model should use a regulator, as above, rather than calling 2500 * out to board code. 2501 */ 2502 board_mmc_power_init(); 2503 #endif 2504 return 0; 2505 } 2506 2507 /* 2508 * put the host in the initial state: 2509 * - turn on Vdd (card power supply) 2510 * - configure the bus width and clock to minimal values 2511 */ 2512 static void mmc_set_initial_state(struct mmc *mmc) 2513 { 2514 int err; 2515 2516 /* First try to set 3.3V. If it fails set to 1.8V */ 2517 err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_330); 2518 if (err != 0) 2519 err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_180); 2520 if (err != 0) 2521 pr_warn("mmc: failed to set signal voltage\n"); 2522 2523 mmc_select_mode(mmc, MMC_LEGACY); 2524 mmc_set_bus_width(mmc, 1); 2525 mmc_set_clock(mmc, 0, MMC_CLK_ENABLE); 2526 } 2527 2528 static int mmc_power_on(struct mmc *mmc) 2529 { 2530 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR) 2531 if (mmc->vmmc_supply) { 2532 int ret = regulator_set_enable(mmc->vmmc_supply, true); 2533 2534 if (ret) { 2535 puts("Error enabling VMMC supply\n"); 2536 return ret; 2537 } 2538 } 2539 #endif 2540 return 0; 2541 } 2542 2543 static int mmc_power_off(struct mmc *mmc) 2544 { 2545 mmc_set_clock(mmc, 0, MMC_CLK_DISABLE); 2546 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR) 2547 if (mmc->vmmc_supply) { 2548 int ret = regulator_set_enable(mmc->vmmc_supply, false); 2549 2550 if (ret) { 2551 pr_debug("Error disabling VMMC supply\n"); 2552 return ret; 2553 } 2554 } 2555 #endif 2556 return 0; 2557 } 2558 2559 static int mmc_power_cycle(struct mmc *mmc) 2560 { 2561 int ret; 2562 2563 ret = mmc_power_off(mmc); 2564 if (ret) 2565 return ret; 2566 /* 2567 * SD spec recommends at least 1ms of delay. Let's wait for 2ms 2568 * to be on the safer side. 2569 */ 2570 udelay(2000); 2571 return mmc_power_on(mmc); 2572 } 2573 2574 int mmc_get_op_cond(struct mmc *mmc) 2575 { 2576 bool uhs_en = supports_uhs(mmc->cfg->host_caps); 2577 int err; 2578 2579 if (mmc->has_init) 2580 return 0; 2581 2582 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT 2583 mmc_adapter_card_type_ident(); 2584 #endif 2585 err = mmc_power_init(mmc); 2586 if (err) 2587 return err; 2588 2589 #ifdef CONFIG_MMC_QUIRKS 2590 mmc->quirks = MMC_QUIRK_RETRY_SET_BLOCKLEN | 2591 MMC_QUIRK_RETRY_SEND_CID; 2592 #endif 2593 2594 err = mmc_power_cycle(mmc); 2595 if (err) { 2596 /* 2597 * if power cycling is not supported, we should not try 2598 * to use the UHS modes, because we wouldn't be able to 2599 * recover from an error during the UHS initialization. 2600 */ 2601 pr_debug("Unable to do a full power cycle. Disabling the UHS modes for safety\n"); 2602 uhs_en = false; 2603 mmc->host_caps &= ~UHS_CAPS; 2604 err = mmc_power_on(mmc); 2605 } 2606 if (err) 2607 return err; 2608 2609 #if CONFIG_IS_ENABLED(DM_MMC) 2610 /* The device has already been probed ready for use */ 2611 #else 2612 /* made sure it's not NULL earlier */ 2613 err = mmc->cfg->ops->init(mmc); 2614 if (err) 2615 return err; 2616 #endif 2617 mmc->ddr_mode = 0; 2618 2619 retry: 2620 mmc_set_initial_state(mmc); 2621 mmc_send_init_stream(mmc); 2622 2623 /* Reset the Card */ 2624 err = mmc_go_idle(mmc); 2625 2626 if (err) 2627 return err; 2628 2629 /* The internal partition reset to user partition(0) at every CMD0*/ 2630 mmc_get_blk_desc(mmc)->hwpart = 0; 2631 2632 /* Test for SD version 2 */ 2633 err = mmc_send_if_cond(mmc); 2634 2635 /* Now try to get the SD card's operating condition */ 2636 err = sd_send_op_cond(mmc, uhs_en); 2637 if (err && uhs_en) { 2638 uhs_en = false; 2639 mmc_power_cycle(mmc); 2640 goto retry; 2641 } 2642 2643 /* If the command timed out, we check for an MMC card */ 2644 if (err == -ETIMEDOUT) { 2645 err = mmc_send_op_cond(mmc); 2646 2647 if (err) { 2648 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 2649 pr_err("Card did not respond to voltage select!\n"); 2650 #endif 2651 return -EOPNOTSUPP; 2652 } 2653 } 2654 2655 return err; 2656 } 2657 2658 int mmc_start_init(struct mmc *mmc) 2659 { 2660 bool no_card; 2661 int err = 0; 2662 2663 /* 2664 * all hosts are capable of 1 bit bus-width and able to use the legacy 2665 * timings. 2666 */ 2667 mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(SD_LEGACY) | 2668 MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT; 2669 2670 #if !defined(CONFIG_MMC_BROKEN_CD) 2671 /* we pretend there's no card when init is NULL */ 2672 no_card = mmc_getcd(mmc) == 0; 2673 #else 2674 no_card = 0; 2675 #endif 2676 #if !CONFIG_IS_ENABLED(DM_MMC) 2677 no_card = no_card || (mmc->cfg->ops->init == NULL); 2678 #endif 2679 if (no_card) { 2680 mmc->has_init = 0; 2681 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 2682 pr_err("MMC: no card present\n"); 2683 #endif 2684 return -ENOMEDIUM; 2685 } 2686 2687 err = mmc_get_op_cond(mmc); 2688 2689 if (!err) 2690 mmc->init_in_progress = 1; 2691 2692 return err; 2693 } 2694 2695 static int mmc_complete_init(struct mmc *mmc) 2696 { 2697 int err = 0; 2698 2699 mmc->init_in_progress = 0; 2700 if (mmc->op_cond_pending) 2701 err = mmc_complete_op_cond(mmc); 2702 2703 if (!err) 2704 err = mmc_startup(mmc); 2705 if (err) 2706 mmc->has_init = 0; 2707 else 2708 mmc->has_init = 1; 2709 return err; 2710 } 2711 2712 int mmc_init(struct mmc *mmc) 2713 { 2714 int err = 0; 2715 __maybe_unused ulong start; 2716 #if CONFIG_IS_ENABLED(DM_MMC) 2717 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc->dev); 2718 2719 upriv->mmc = mmc; 2720 #endif 2721 if (mmc->has_init) 2722 return 0; 2723 2724 start = get_timer(0); 2725 2726 if (!mmc->init_in_progress) 2727 err = mmc_start_init(mmc); 2728 2729 if (!err) 2730 err = mmc_complete_init(mmc); 2731 if (err) 2732 pr_info("%s: %d, time %lu\n", __func__, err, get_timer(start)); 2733 2734 return err; 2735 } 2736 2737 int mmc_set_dsr(struct mmc *mmc, u16 val) 2738 { 2739 mmc->dsr = val; 2740 return 0; 2741 } 2742 2743 /* CPU-specific MMC initializations */ 2744 __weak int cpu_mmc_init(bd_t *bis) 2745 { 2746 return -1; 2747 } 2748 2749 /* board-specific MMC initializations. */ 2750 __weak int board_mmc_init(bd_t *bis) 2751 { 2752 return -1; 2753 } 2754 2755 void mmc_set_preinit(struct mmc *mmc, int preinit) 2756 { 2757 mmc->preinit = preinit; 2758 } 2759 2760 #if CONFIG_IS_ENABLED(DM_MMC) 2761 static int mmc_probe(bd_t *bis) 2762 { 2763 int ret, i; 2764 struct uclass *uc; 2765 struct udevice *dev; 2766 2767 ret = uclass_get(UCLASS_MMC, &uc); 2768 if (ret) 2769 return ret; 2770 2771 /* 2772 * Try to add them in sequence order. Really with driver model we 2773 * should allow holes, but the current MMC list does not allow that. 2774 * So if we request 0, 1, 3 we will get 0, 1, 2. 2775 */ 2776 for (i = 0; ; i++) { 2777 ret = uclass_get_device_by_seq(UCLASS_MMC, i, &dev); 2778 if (ret == -ENODEV) 2779 break; 2780 } 2781 uclass_foreach_dev(dev, uc) { 2782 ret = device_probe(dev); 2783 if (ret) 2784 pr_err("%s - probe failed: %d\n", dev->name, ret); 2785 } 2786 2787 return 0; 2788 } 2789 #else 2790 static int mmc_probe(bd_t *bis) 2791 { 2792 if (board_mmc_init(bis) < 0) 2793 cpu_mmc_init(bis); 2794 2795 return 0; 2796 } 2797 #endif 2798 2799 int mmc_initialize(bd_t *bis) 2800 { 2801 static int initialized = 0; 2802 int ret; 2803 if (initialized) /* Avoid initializing mmc multiple times */ 2804 return 0; 2805 initialized = 1; 2806 2807 #if !CONFIG_IS_ENABLED(BLK) 2808 #if !CONFIG_IS_ENABLED(MMC_TINY) 2809 mmc_list_init(); 2810 #endif 2811 #endif 2812 ret = mmc_probe(bis); 2813 if (ret) 2814 return ret; 2815 2816 #ifndef CONFIG_SPL_BUILD 2817 print_mmc_devices(','); 2818 #endif 2819 2820 mmc_do_preinit(); 2821 return 0; 2822 } 2823 2824 #ifdef CONFIG_CMD_BKOPS_ENABLE 2825 int mmc_set_bkops_enable(struct mmc *mmc) 2826 { 2827 int err; 2828 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); 2829 2830 err = mmc_send_ext_csd(mmc, ext_csd); 2831 if (err) { 2832 puts("Could not get ext_csd register values\n"); 2833 return err; 2834 } 2835 2836 if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) { 2837 puts("Background operations not supported on device\n"); 2838 return -EMEDIUMTYPE; 2839 } 2840 2841 if (ext_csd[EXT_CSD_BKOPS_EN] & 0x1) { 2842 puts("Background operations already enabled\n"); 2843 return 0; 2844 } 2845 2846 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BKOPS_EN, 1); 2847 if (err) { 2848 puts("Failed to enable manual background operations\n"); 2849 return err; 2850 } 2851 2852 puts("Enabled manual background operations\n"); 2853 2854 return 0; 2855 } 2856 #endif 2857