/* * Copyright © 2009 - Maxim Levitsky * Common routines & support for xD format * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #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 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 mtd_info *mtd, loff_t ofs) { 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->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->dummy_controller.ops = &sm_controller_ops; flash_ids = smartmedia ? nand_smartmedia_flash_ids : nand_xd_flash_ids; ret = nand_scan_with_ids(mtd, 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 "); MODULE_DESCRIPTION("Common SmartMedia/xD functions");