| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright © 2009 - Maxim Levitsky |
| * Common routines & support for xD format |
| */ |
| #include <linux/kernel.h> |
| #include <linux/mtd/rawnand.h> |
| #include <linux/module.h> |
| #include <linux/sizes.h> |
| #include "sm_common.h" |
| |
| static int oob_sm_ooblayout_ecc(struct mtd_info *mtd, int section, |
| struct mtd_oob_region *oobregion) |
| { |
| if (section > 1) |
| return -ERANGE; |
| |
| oobregion->length = 3; |
| oobregion->offset = ((section + 1) * 8) - 3; |
| |
| return 0; |
| } |
| |
| static int oob_sm_ooblayout_free(struct mtd_info *mtd, int section, |
| struct mtd_oob_region *oobregion) |
| { |
| switch (section) { |
| case 0: |
| /* reserved */ |
| oobregion->offset = 0; |
| oobregion->length = 4; |
| break; |
| case 1: |
| /* LBA1 */ |
| oobregion->offset = 6; |
| oobregion->length = 2; |
| break; |
| case 2: |
| /* LBA2 */ |
| oobregion->offset = 11; |
| oobregion->length = 2; |
| break; |
| default: |
| return -ERANGE; |
| } |
| |
| return 0; |
| } |
| |
| static const struct mtd_ooblayout_ops oob_sm_ops = { |
| .ecc = oob_sm_ooblayout_ecc, |
| .free = oob_sm_ooblayout_free, |
| }; |
| |
| /* NOTE: This layout is not compatabable with SmartMedia, */ |
| /* because the 256 byte devices have page depenent oob layout */ |
| /* However it does preserve the bad block markers */ |
| /* If you use smftl, it will bypass this and work correctly */ |
| /* If you not, then you break SmartMedia compliance anyway */ |
| |
| static int oob_sm_small_ooblayout_ecc(struct mtd_info *mtd, int section, |
| struct mtd_oob_region *oobregion) |
| { |
| if (section) |
| return -ERANGE; |
| |
| oobregion->length = 3; |
| oobregion->offset = 0; |
| |
| return 0; |
| } |
| |
| static int oob_sm_small_ooblayout_free(struct mtd_info *mtd, int section, |
| struct mtd_oob_region *oobregion) |
| { |
| switch (section) { |
| case 0: |
| /* reserved */ |
| oobregion->offset = 3; |
| oobregion->length = 2; |
| break; |
| case 1: |
| /* LBA1 */ |
| oobregion->offset = 6; |
| oobregion->length = 2; |
| break; |
| default: |
| return -ERANGE; |
| } |
| |
| return 0; |
| } |
| |
| static const struct mtd_ooblayout_ops oob_sm_small_ops = { |
| .ecc = oob_sm_small_ooblayout_ecc, |
| .free = oob_sm_small_ooblayout_free, |
| }; |
| |
| static int sm_block_markbad(struct nand_chip *chip, loff_t ofs) |
| { |
| struct mtd_info *mtd = nand_to_mtd(chip); |
| struct mtd_oob_ops ops; |
| struct sm_oob oob; |
| int ret; |
| |
| memset(&oob, -1, SM_OOB_SIZE); |
| oob.block_status = 0x0F; |
| |
| /* As long as this function is called on erase block boundaries |
| it will work correctly for 256 byte nand */ |
| ops.mode = MTD_OPS_PLACE_OOB; |
| ops.ooboffs = 0; |
| ops.ooblen = mtd->oobsize; |
| ops.oobbuf = (void *)&oob; |
| ops.datbuf = NULL; |
| |
| |
| ret = mtd_write_oob(mtd, ofs, &ops); |
| if (ret < 0 || ops.oobretlen != SM_OOB_SIZE) { |
| pr_notice("sm_common: can't mark sector at %i as bad\n", |
| (int)ofs); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static struct nand_flash_dev nand_smartmedia_flash_ids[] = { |
| LEGACY_ID_NAND("SmartMedia 2MiB 3,3V ROM", 0x5d, 2, SZ_8K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 4MiB 3,3V", 0xe3, 4, SZ_8K, 0), |
| LEGACY_ID_NAND("SmartMedia 4MiB 3,3/5V", 0xe5, 4, SZ_8K, 0), |
| LEGACY_ID_NAND("SmartMedia 4MiB 5V", 0x6b, 4, SZ_8K, 0), |
| LEGACY_ID_NAND("SmartMedia 4MiB 3,3V ROM", 0xd5, 4, SZ_8K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 8MiB 3,3V", 0xe6, 8, SZ_8K, 0), |
| LEGACY_ID_NAND("SmartMedia 8MiB 3,3V ROM", 0xd6, 8, SZ_8K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 16MiB 3,3V", 0x73, 16, SZ_16K, 0), |
| LEGACY_ID_NAND("SmartMedia 16MiB 3,3V ROM", 0x57, 16, SZ_16K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 32MiB 3,3V", 0x75, 32, SZ_16K, 0), |
| LEGACY_ID_NAND("SmartMedia 32MiB 3,3V ROM", 0x58, 32, SZ_16K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 64MiB 3,3V", 0x76, 64, SZ_16K, 0), |
| LEGACY_ID_NAND("SmartMedia 64MiB 3,3V ROM", 0xd9, 64, SZ_16K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 128MiB 3,3V", 0x79, 128, SZ_16K, 0), |
| LEGACY_ID_NAND("SmartMedia 128MiB 3,3V ROM", 0xda, 128, SZ_16K, NAND_ROM), |
| LEGACY_ID_NAND("SmartMedia 256MiB 3, 3V", 0x71, 256, SZ_16K, 0), |
| LEGACY_ID_NAND("SmartMedia 256MiB 3,3V ROM", 0x5b, 256, SZ_16K, NAND_ROM), |
| {NULL} |
| }; |
| |
| static struct nand_flash_dev nand_xd_flash_ids[] = { |
| LEGACY_ID_NAND("xD 16MiB 3,3V", 0x73, 16, SZ_16K, 0), |
| LEGACY_ID_NAND("xD 32MiB 3,3V", 0x75, 32, SZ_16K, 0), |
| LEGACY_ID_NAND("xD 64MiB 3,3V", 0x76, 64, SZ_16K, 0), |
| LEGACY_ID_NAND("xD 128MiB 3,3V", 0x79, 128, SZ_16K, 0), |
| LEGACY_ID_NAND("xD 256MiB 3,3V", 0x71, 256, SZ_16K, NAND_BROKEN_XD), |
| LEGACY_ID_NAND("xD 512MiB 3,3V", 0xdc, 512, SZ_16K, NAND_BROKEN_XD), |
| LEGACY_ID_NAND("xD 1GiB 3,3V", 0xd3, 1024, SZ_16K, NAND_BROKEN_XD), |
| LEGACY_ID_NAND("xD 2GiB 3,3V", 0xd5, 2048, SZ_16K, NAND_BROKEN_XD), |
| {NULL} |
| }; |
| |
| static int sm_attach_chip(struct nand_chip *chip) |
| { |
| struct mtd_info *mtd = nand_to_mtd(chip); |
| |
| /* Bad block marker position */ |
| chip->badblockpos = 0x05; |
| chip->badblockbits = 7; |
| chip->legacy.block_markbad = sm_block_markbad; |
| |
| /* ECC layout */ |
| if (mtd->writesize == SM_SECTOR_SIZE) |
| mtd_set_ooblayout(mtd, &oob_sm_ops); |
| else if (mtd->writesize == SM_SMALL_PAGE) |
| mtd_set_ooblayout(mtd, &oob_sm_small_ops); |
| else |
| return -ENODEV; |
| |
| return 0; |
| } |
| |
| static const struct nand_controller_ops sm_controller_ops = { |
| .attach_chip = sm_attach_chip, |
| }; |
| |
| int sm_register_device(struct mtd_info *mtd, int smartmedia) |
| { |
| struct nand_chip *chip = mtd_to_nand(mtd); |
| struct nand_flash_dev *flash_ids; |
| int ret; |
| |
| chip->options |= NAND_SKIP_BBTSCAN; |
| |
| /* Scan for card properties */ |
| chip->legacy.dummy_controller.ops = &sm_controller_ops; |
| flash_ids = smartmedia ? nand_smartmedia_flash_ids : nand_xd_flash_ids; |
| ret = nand_scan_with_ids(chip, 1, flash_ids); |
| if (ret) |
| return ret; |
| |
| ret = mtd_device_register(mtd, NULL, 0); |
| if (ret) |
| nand_cleanup(chip); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(sm_register_device); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>"); |
| MODULE_DESCRIPTION("Common SmartMedia/xD functions"); |