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