1 /* 2 * (C) Copyright 2019 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <blk.h> 9 #include <boot_rkimg.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <image.h> 13 #include <linux/log2.h> 14 #include <malloc.h> 15 #include <nand.h> 16 #include <part.h> 17 #include <spi.h> 18 #include <dm/device-internal.h> 19 #include <linux/mtd/spi-nor.h> 20 #ifdef CONFIG_NAND 21 #include <linux/mtd/nand.h> 22 #endif 23 24 #define MTD_PART_NAND_HEAD "mtdparts=" 25 #define MTD_ROOT_PART_NUM "ubi.mtd=" 26 #define MTD_ROOT_PART_NAME_UBIFS "root=ubi0:rootfs" 27 #define MTD_ROOT_PART_NAME_SQUASHFS "root=/dev/ubiblock0_0" 28 #define MTD_PART_INFO_MAX_SIZE 512 29 #define MTD_SINGLE_PART_INFO_MAX_SIZE 40 30 31 #define MTD_BLK_TABLE_BLOCK_UNKNOWN (-2) 32 #define MTD_BLK_TABLE_BLOCK_SHIFT (-1) 33 34 static int *mtd_map_blk_table; 35 36 int mtd_blk_map_table_init(struct blk_desc *desc, 37 loff_t offset, 38 size_t length) 39 { 40 u32 blk_total, blk_begin, blk_cnt; 41 struct mtd_info *mtd = NULL; 42 int i, j; 43 44 if (!desc) 45 return -ENODEV; 46 47 switch (desc->devnum) { 48 case BLK_MTD_NAND: 49 case BLK_MTD_SPI_NAND: 50 mtd = desc->bdev->priv; 51 break; 52 default: 53 break; 54 } 55 56 if (!mtd) { 57 return -ENODEV; 58 } else { 59 blk_total = (mtd->size + mtd->erasesize - 1) >> mtd->erasesize_shift; 60 if (!mtd_map_blk_table) { 61 mtd_map_blk_table = (int *)malloc(blk_total * sizeof(int)); 62 if (!mtd_map_blk_table) 63 return -ENOMEM; 64 for (i = 0; i < blk_total; i++) 65 mtd_map_blk_table[i] = MTD_BLK_TABLE_BLOCK_UNKNOWN; 66 } 67 68 blk_begin = (u32)offset >> mtd->erasesize_shift; 69 blk_cnt = ((u32)((offset & mtd->erasesize_mask) + length + \ 70 mtd->erasesize - 1) >> mtd->erasesize_shift); 71 if (blk_begin >= blk_total) { 72 pr_err("map table blk begin[%d] overflow\n", blk_begin); 73 return -EINVAL; 74 } 75 if ((blk_begin + blk_cnt) > blk_total) 76 blk_cnt = blk_total - blk_begin; 77 78 if (mtd_map_blk_table[blk_begin] != MTD_BLK_TABLE_BLOCK_UNKNOWN) 79 return 0; 80 81 j = 0; 82 /* should not across blk_cnt */ 83 for (i = 0; i < blk_cnt; i++) { 84 if (j >= blk_cnt) 85 mtd_map_blk_table[blk_begin + i] = MTD_BLK_TABLE_BLOCK_SHIFT; 86 for (; j < blk_cnt; j++) { 87 if (!mtd_block_isbad(mtd, (blk_begin + j) << mtd->erasesize_shift)) { 88 mtd_map_blk_table[blk_begin + i] = blk_begin + j; 89 j++; 90 if (j == blk_cnt) 91 j++; 92 break; 93 } 94 } 95 } 96 97 return 0; 98 } 99 } 100 101 static bool get_mtd_blk_map_address(struct mtd_info *mtd, loff_t *off) 102 { 103 bool mapped; 104 loff_t offset = *off; 105 size_t block_offset = offset & (mtd->erasesize - 1); 106 107 mapped = false; 108 if (!mtd_map_blk_table || 109 mtd_map_blk_table[(u64)offset >> mtd->erasesize_shift] == 110 MTD_BLK_TABLE_BLOCK_UNKNOWN || 111 mtd_map_blk_table[(u64)offset >> mtd->erasesize_shift] == 112 0xffffffff) 113 return mapped; 114 115 mapped = true; 116 *off = (loff_t)(((u32)mtd_map_blk_table[(u64)offset >> 117 mtd->erasesize_shift] << mtd->erasesize_shift) + block_offset); 118 119 return mapped; 120 } 121 122 void mtd_blk_map_partitions(struct blk_desc *desc) 123 { 124 disk_partition_t info; 125 int i, ret; 126 127 if (!desc) 128 return; 129 130 if (desc->if_type != IF_TYPE_MTD) 131 return; 132 133 for (i = 1; i < MAX_SEARCH_PARTITIONS; i++) { 134 ret = part_get_info(desc, i, &info); 135 if (ret != 0) 136 continue; 137 138 if (mtd_blk_map_table_init(desc, 139 info.start << 9, 140 info.size << 9)) { 141 pr_debug("mtd block map table fail\n"); 142 } 143 } 144 } 145 146 void mtd_blk_map_fit(struct blk_desc *desc, ulong sector, void *fit) 147 { 148 struct mtd_info *mtd = NULL; 149 int totalsize = 0; 150 151 if (desc->if_type != IF_TYPE_MTD) 152 return; 153 154 if (desc->devnum == BLK_MTD_NAND) { 155 #if defined(CONFIG_NAND) 156 mtd = dev_get_priv(desc->bdev->parent); 157 #endif 158 } else if (desc->devnum == BLK_MTD_SPI_NAND) { 159 #if defined(CONFIG_MTD_SPI_NAND) 160 mtd = desc->bdev->priv; 161 #endif 162 } 163 164 #ifdef CONFIG_SPL_FIT 165 if (fit_get_totalsize(fit, &totalsize)) 166 debug("Can not find /totalsize node.\n"); 167 #endif 168 if (mtd && totalsize) { 169 if (mtd_blk_map_table_init(desc, sector << 9, totalsize + (size_t)mtd->erasesize)) 170 debug("Map block table fail.\n"); 171 } 172 } 173 174 static __maybe_unused int mtd_map_read(struct mtd_info *mtd, loff_t offset, 175 size_t *length, size_t *actual, 176 loff_t lim, u_char *buffer) 177 { 178 size_t left_to_read = *length; 179 u_char *p_buffer = buffer; 180 int rval; 181 182 while (left_to_read > 0) { 183 size_t block_offset = offset & (mtd->erasesize - 1); 184 size_t read_length; 185 loff_t mapped_offset; 186 187 if (offset >= mtd->size) 188 return 0; 189 190 mapped_offset = offset; 191 if (!get_mtd_blk_map_address(mtd, &mapped_offset)) { 192 if (mtd_block_isbad(mtd, mapped_offset & 193 ~(mtd->erasesize - 1))) { 194 printf("Skipping bad block 0x%08llx\n", 195 offset & ~(mtd->erasesize - 1)); 196 offset += mtd->erasesize - block_offset; 197 continue; 198 } 199 } 200 201 if (left_to_read < (mtd->erasesize - block_offset)) 202 read_length = left_to_read; 203 else 204 read_length = mtd->erasesize - block_offset; 205 206 rval = mtd_read(mtd, mapped_offset, read_length, &read_length, 207 p_buffer); 208 if (rval && rval != -EUCLEAN) { 209 printf("NAND read from offset %llx failed %d\n", 210 offset, rval); 211 *length -= left_to_read; 212 return rval; 213 } 214 215 left_to_read -= read_length; 216 offset += read_length; 217 p_buffer += read_length; 218 } 219 220 return 0; 221 } 222 223 static __maybe_unused int mtd_map_write(struct mtd_info *mtd, loff_t offset, 224 size_t *length, size_t *actual, 225 loff_t lim, u_char *buffer, int flags) 226 { 227 int rval = 0, blocksize; 228 size_t left_to_write = *length; 229 u_char *p_buffer = buffer; 230 struct erase_info ei; 231 232 blocksize = mtd->erasesize; 233 234 /* 235 * nand_write() handles unaligned, partial page writes. 236 * 237 * We allow length to be unaligned, for convenience in 238 * using the $filesize variable. 239 * 240 * However, starting at an unaligned offset makes the 241 * semantics of bad block skipping ambiguous (really, 242 * you should only start a block skipping access at a 243 * partition boundary). So don't try to handle that. 244 */ 245 if ((offset & (mtd->writesize - 1)) != 0) { 246 printf("Attempt to write non page-aligned data\n"); 247 *length = 0; 248 return -EINVAL; 249 } 250 251 while (left_to_write > 0) { 252 size_t block_offset = offset & (mtd->erasesize - 1); 253 size_t write_size, truncated_write_size; 254 loff_t mapped_offset; 255 256 if (offset >= mtd->size) 257 return 0; 258 259 mapped_offset = offset; 260 if (!get_mtd_blk_map_address(mtd, &mapped_offset)) { 261 if (mtd_block_isbad(mtd, mapped_offset & 262 ~(mtd->erasesize - 1))) { 263 printf("Skipping bad block 0x%08llx\n", 264 offset & ~(mtd->erasesize - 1)); 265 offset += mtd->erasesize - block_offset; 266 continue; 267 } 268 } 269 270 if (!(mapped_offset & mtd->erasesize_mask)) { 271 memset(&ei, 0, sizeof(struct erase_info)); 272 ei.addr = mapped_offset; 273 ei.len = mtd->erasesize; 274 rval = mtd_erase(mtd, &ei); 275 if (rval) { 276 pr_info("error %d while erasing %llx\n", rval, 277 mapped_offset); 278 return rval; 279 } 280 } 281 282 if (left_to_write < (blocksize - block_offset)) 283 write_size = left_to_write; 284 else 285 write_size = blocksize - block_offset; 286 287 truncated_write_size = write_size; 288 rval = mtd_write(mtd, mapped_offset, truncated_write_size, 289 (size_t *)(&truncated_write_size), p_buffer); 290 291 offset += write_size; 292 p_buffer += write_size; 293 294 if (rval != 0) { 295 printf("NAND write to offset %llx failed %d\n", 296 offset, rval); 297 *length -= left_to_write; 298 return rval; 299 } 300 301 left_to_write -= write_size; 302 } 303 304 return 0; 305 } 306 307 static __maybe_unused int mtd_map_erase(struct mtd_info *mtd, loff_t offset, 308 size_t length) 309 { 310 struct erase_info ei; 311 loff_t pos, len; 312 int ret; 313 314 pos = offset; 315 len = length; 316 317 if ((pos & mtd->erasesize_mask) || (len & mtd->erasesize_mask)) { 318 pr_err("Attempt to erase non block-aligned data, pos= %llx, len= %llx\n", 319 pos, len); 320 321 return -EINVAL; 322 } 323 324 while (len) { 325 loff_t mapped_offset; 326 327 mapped_offset = pos; 328 if (!get_mtd_blk_map_address(mtd, &mapped_offset)) { 329 if (mtd_block_isbad(mtd, pos) || mtd_block_isreserved(mtd, pos)) { 330 pr_debug("attempt to erase a bad/reserved block @%llx\n", 331 pos); 332 pos += mtd->erasesize; 333 continue; 334 } 335 } 336 337 memset(&ei, 0, sizeof(struct erase_info)); 338 ei.addr = mapped_offset; 339 ei.len = mtd->erasesize; 340 ret = mtd_erase(mtd, &ei); 341 if (ret) { 342 pr_err("map_erase error %d while erasing %llx\n", ret, 343 pos); 344 return ret; 345 } 346 347 pos += mtd->erasesize; 348 len -= mtd->erasesize; 349 } 350 351 return 0; 352 } 353 354 char *mtd_part_parse(void) 355 { 356 char mtd_part_info_temp[MTD_SINGLE_PART_INFO_MAX_SIZE] = {0}; 357 u32 length, data_len = MTD_PART_INFO_MAX_SIZE; 358 char mtd_root_part_info[40] = {0}; 359 struct blk_desc *dev_desc; 360 disk_partition_t info; 361 char *mtd_part_info_p; 362 struct mtd_info *mtd; 363 char *mtd_part_info; 364 int ret; 365 int p; 366 367 dev_desc = rockchip_get_bootdev(); 368 if (!dev_desc) 369 return NULL; 370 371 mtd = (struct mtd_info *)dev_desc->bdev->priv; 372 if (!mtd) 373 return NULL; 374 375 p = part_get_info_by_name(dev_desc, PART_SYSTEM, &info); 376 if (p > 0) { 377 if (strstr(env_get("bootargs"), "rootfstype=squashfs")) 378 snprintf(mtd_root_part_info, ARRAY_SIZE(mtd_root_part_info), "%s%d %s", 379 MTD_ROOT_PART_NUM, p - 1, MTD_ROOT_PART_NAME_SQUASHFS); 380 else 381 snprintf(mtd_root_part_info, ARRAY_SIZE(mtd_root_part_info), "%s%d %s", 382 MTD_ROOT_PART_NUM, p - 1, MTD_ROOT_PART_NAME_UBIFS); 383 env_update("bootargs", mtd_root_part_info); 384 } 385 386 mtd_part_info = (char *)calloc(MTD_PART_INFO_MAX_SIZE, sizeof(char)); 387 if (!mtd_part_info) { 388 printf("%s: Fail to malloc!", __func__); 389 return NULL; 390 } 391 392 mtd_part_info_p = mtd_part_info; 393 snprintf(mtd_part_info_p, data_len - 1, "%s%s:", 394 MTD_PART_NAND_HEAD, 395 dev_desc->product); 396 data_len -= strlen(mtd_part_info_p); 397 mtd_part_info_p = mtd_part_info_p + strlen(mtd_part_info_p); 398 399 for (p = 1; p < MAX_SEARCH_PARTITIONS; p++) { 400 ret = part_get_info(dev_desc, p, &info); 401 if (ret) 402 break; 403 404 debug("name is %s, start addr is %x\n", info.name, 405 (int)(size_t)info.start); 406 407 snprintf(mtd_part_info_p, data_len - 1, "0x%x@0x%x(%s)", 408 (int)(size_t)info.size << 9, 409 (int)(size_t)info.start << 9, 410 info.name); 411 snprintf(mtd_part_info_temp, MTD_SINGLE_PART_INFO_MAX_SIZE - 1, 412 "0x%x@0x%x(%s)", 413 (int)(size_t)info.size << 9, 414 (int)(size_t)info.start << 9, 415 info.name); 416 strcat(mtd_part_info, ","); 417 if (part_get_info(dev_desc, p + 1, &info)) { 418 /* Partition with grow tag in parameter will be resized */ 419 if ((info.size + info.start + 64) >= dev_desc->lba) { 420 if (dev_desc->devnum == BLK_MTD_SPI_NOR) { 421 /* Nor is 64KB erase block(kernel) and gpt table just 422 * resserve 33 sectors for the last partition. This 423 * will erase the backup gpt table by user program, 424 * so reserve one block. 425 */ 426 snprintf(mtd_part_info_p, data_len - 1, "0x%x@0x%x(%s)", 427 (int)(size_t)(info.size - 428 (info.size - 1) % 429 (0x10000 >> 9) - 1) << 9, 430 (int)(size_t)info.start << 9, 431 info.name); 432 break; 433 } else { 434 /* Nand flash is erased by block and gpt table just 435 * resserve 33 sectors for the last partition. This 436 * will erase the backup gpt table by user program, 437 * so reserve one block. 438 */ 439 snprintf(mtd_part_info_p, data_len - 1, "0x%x@0x%x(%s)", 440 (int)(size_t)(info.size - 441 (info.size - 1) % 442 (mtd->erasesize >> 9) - 1) << 9, 443 (int)(size_t)info.start << 9, 444 info.name); 445 break; 446 } 447 } else { 448 snprintf(mtd_part_info_temp, MTD_SINGLE_PART_INFO_MAX_SIZE - 1, 449 "0x%x@0x%x(%s)", 450 (int)(size_t)info.size << 9, 451 (int)(size_t)info.start << 9, 452 info.name); 453 break; 454 } 455 } 456 length = strlen(mtd_part_info_temp); 457 data_len -= length; 458 mtd_part_info_p = mtd_part_info_p + length + 1; 459 memset(mtd_part_info_temp, 0, MTD_SINGLE_PART_INFO_MAX_SIZE); 460 } 461 462 return mtd_part_info; 463 } 464 465 ulong mtd_dread(struct udevice *udev, lbaint_t start, 466 lbaint_t blkcnt, void *dst) 467 { 468 struct blk_desc *desc = dev_get_uclass_platdata(udev); 469 #if defined(CONFIG_NAND) || defined(CONFIG_MTD_SPI_NAND) || defined(CONFIG_SPI_FLASH_MTD) 470 loff_t off = (loff_t)(start * 512); 471 size_t rwsize = blkcnt * 512; 472 #endif 473 struct mtd_info *mtd; 474 int ret = 0; 475 476 if (!desc) 477 return ret; 478 479 mtd = desc->bdev->priv; 480 if (!mtd) 481 return 0; 482 483 if (blkcnt == 0) 484 return 0; 485 486 pr_debug("mtd dread %s %lx %lx\n", mtd->name, start, blkcnt); 487 488 if (desc->devnum == BLK_MTD_NAND) { 489 ret = mtd_map_read(mtd, off, &rwsize, 490 NULL, mtd->size, 491 (u_char *)(dst)); 492 if (!ret) 493 return blkcnt; 494 else 495 return 0; 496 } else if (desc->devnum == BLK_MTD_SPI_NAND) { 497 ret = mtd_map_read(mtd, off, &rwsize, 498 NULL, mtd->size, 499 (u_char *)(dst)); 500 if (!ret) 501 return blkcnt; 502 else 503 return 0; 504 } else if (desc->devnum == BLK_MTD_SPI_NOR) { 505 #if defined(CONFIG_SPI_FLASH_MTD) || defined(CONFIG_SPL_BUILD) 506 struct spi_nor *nor = (struct spi_nor *)mtd->priv; 507 struct spi_slave *spi = nor->spi; 508 size_t retlen_nor; 509 510 if (desc->op_flag == BLK_PRE_RW) 511 spi->mode |= SPI_DMA_PREPARE; 512 mtd_read(mtd, off, rwsize, &retlen_nor, dst); 513 if (desc->op_flag == BLK_PRE_RW) 514 spi->mode |= SPI_DMA_PREPARE; 515 516 if (retlen_nor == rwsize) 517 return blkcnt; 518 else 519 #endif 520 return 0; 521 } else { 522 return 0; 523 } 524 } 525 526 #if CONFIG_IS_ENABLED(MTD_WRITE) 527 ulong mtd_dwrite(struct udevice *udev, lbaint_t start, 528 lbaint_t blkcnt, const void *src) 529 { 530 struct blk_desc *desc = dev_get_uclass_platdata(udev); 531 #if defined(CONFIG_NAND) || defined(CONFIG_MTD_SPI_NAND) || defined(CONFIG_SPI_FLASH_MTD) 532 loff_t off = (loff_t)(start * 512); 533 size_t rwsize = blkcnt * 512; 534 #endif 535 struct mtd_info *mtd; 536 int ret = 0; 537 538 if (!desc) 539 return ret; 540 541 mtd = desc->bdev->priv; 542 if (!mtd) 543 return 0; 544 545 pr_debug("mtd dwrite %s %lx %lx\n", mtd->name, start, blkcnt); 546 547 if (blkcnt == 0) 548 return 0; 549 550 if (desc->devnum == BLK_MTD_NAND || 551 desc->devnum == BLK_MTD_SPI_NAND || 552 desc->devnum == BLK_MTD_SPI_NOR) { 553 if (desc->op_flag == BLK_MTD_CONT_WRITE) { 554 ret = mtd_map_write(mtd, off, &rwsize, 555 NULL, mtd->size, 556 (u_char *)(src), 0); 557 if (!ret) 558 return blkcnt; 559 else 560 return 0; 561 } else { 562 lbaint_t off_aligned, alinged; 563 size_t rwsize_aligned; 564 u8 *p_buf; 565 566 alinged = off & mtd->erasesize_mask; 567 off_aligned = off - alinged; 568 rwsize_aligned = rwsize + alinged; 569 rwsize_aligned = (rwsize_aligned + mtd->erasesize - 1) & 570 ~(mtd->erasesize - 1); 571 572 p_buf = malloc(rwsize_aligned); 573 if (!p_buf) { 574 printf("%s: Fail to malloc!", __func__); 575 return 0; 576 } 577 578 ret = mtd_map_read(mtd, off_aligned, &rwsize_aligned, 579 NULL, mtd->size, 580 (u_char *)(p_buf)); 581 if (ret) { 582 free(p_buf); 583 return 0; 584 } 585 586 memcpy(p_buf + alinged, src, rwsize); 587 588 ret = mtd_map_write(mtd, off_aligned, &rwsize_aligned, 589 NULL, mtd->size, 590 (u_char *)(p_buf), 0); 591 free(p_buf); 592 if (!ret) 593 return blkcnt; 594 else 595 return 0; 596 } 597 } else { 598 return 0; 599 } 600 601 return 0; 602 } 603 604 ulong mtd_derase(struct udevice *udev, lbaint_t start, 605 lbaint_t blkcnt) 606 { 607 struct blk_desc *desc = dev_get_uclass_platdata(udev); 608 #if defined(CONFIG_NAND) || defined(CONFIG_MTD_SPI_NAND) || defined(CONFIG_SPI_FLASH_MTD) 609 loff_t off = (loff_t)(start * 512); 610 size_t len = blkcnt * 512; 611 #endif 612 struct mtd_info *mtd; 613 int ret = 0; 614 615 if (!desc) 616 return ret; 617 618 mtd = desc->bdev->priv; 619 if (!mtd) 620 return 0; 621 622 pr_debug("mtd derase %s %lx %lx\n", mtd->name, start, blkcnt); 623 624 if (blkcnt == 0) 625 return 0; 626 627 if (desc->devnum == BLK_MTD_NAND || 628 desc->devnum == BLK_MTD_SPI_NAND || 629 desc->devnum == BLK_MTD_SPI_NOR) { 630 ret = mtd_map_erase(mtd, off, len); 631 if (ret) 632 return ret; 633 } else { 634 return 0; 635 } 636 637 return 0; 638 } 639 #endif 640 641 static int mtd_blk_probe(struct udevice *udev) 642 { 643 struct mtd_info *mtd; 644 struct blk_desc *desc = dev_get_uclass_platdata(udev); 645 int ret, i = 0; 646 647 mtd = dev_get_uclass_priv(udev->parent); 648 if (mtd->type == MTD_NANDFLASH && desc->devnum == BLK_MTD_NAND) { 649 #ifndef CONFIG_SPL_BUILD 650 mtd = dev_get_priv(udev->parent); 651 #endif 652 } 653 654 /* Fill mtd devices information */ 655 if (is_power_of_2(mtd->erasesize)) 656 mtd->erasesize_shift = ffs(mtd->erasesize) - 1; 657 else 658 mtd->erasesize_shift = 0; 659 660 if (is_power_of_2(mtd->writesize)) 661 mtd->writesize_shift = ffs(mtd->writesize) - 1; 662 else 663 mtd->writesize_shift = 0; 664 665 mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1; 666 mtd->writesize_mask = (1 << mtd->writesize_shift) - 1; 667 668 desc->bdev->priv = mtd; 669 sprintf(desc->vendor, "0x%.4x", 0x2207); 670 if (strncmp(mtd->name, "nand", 4) == 0) 671 memcpy(desc->product, "rk-nand", strlen("rk-nand")); 672 else 673 memcpy(desc->product, mtd->name, strlen(mtd->name)); 674 memcpy(desc->revision, "V1.00", sizeof("V1.00")); 675 if (mtd->type == MTD_NANDFLASH) { 676 #ifdef CONFIG_NAND 677 if (desc->devnum == BLK_MTD_NAND) 678 i = NAND_BBT_SCAN_MAXBLOCKS; 679 else if (desc->devnum == BLK_MTD_SPI_NAND) 680 i = NANDDEV_BBT_SCAN_MAXBLOCKS; 681 #endif 682 683 /* 684 * Find the first useful block in the end, 685 * and it is the end lba of the nand storage. 686 */ 687 for (; i < (mtd->size / mtd->erasesize); i++) { 688 ret = mtd_block_isbad(mtd, 689 mtd->size - mtd->erasesize * (i + 1)); 690 if (!ret) { 691 desc->lba = (mtd->size >> 9) - 692 (mtd->erasesize >> 9) * i; 693 break; 694 } 695 } 696 } else { 697 desc->lba = mtd->size >> 9; 698 } 699 700 debug("MTD: desc->lba is %lx\n", desc->lba); 701 702 return 0; 703 } 704 705 static const struct blk_ops mtd_blk_ops = { 706 .read = mtd_dread, 707 #if CONFIG_IS_ENABLED(MTD_WRITE) 708 .write = mtd_dwrite, 709 .erase = mtd_derase, 710 #endif 711 }; 712 713 U_BOOT_DRIVER(mtd_blk) = { 714 .name = "mtd_blk", 715 .id = UCLASS_BLK, 716 .ops = &mtd_blk_ops, 717 .probe = mtd_blk_probe, 718 }; 719