/* * 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 <linux/kernel.h> #include <linux/mtd/nand.h> #include <linux/module.h> #include "sm_common.h" static struct nand_ecclayout nand_oob_sm = { .eccbytes = 6, .eccpos = {8, 9, 10, 13, 14, 15}, .oobfree = { {.offset = 0 , .length = 4}, /* reserved */ {.offset = 6 , .length = 2}, /* LBA1 */ {.offset = 11, .length = 2} /* LBA2 */ } }; /* 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 struct nand_ecclayout nand_oob_sm_small = { .eccbytes = 3, .eccpos = {0, 1, 2}, .oobfree = { {.offset = 3 , .length = 2}, /* reserved */ {.offset = 6 , .length = 2}, /* LBA1 */ } }; static int sm_block_markbad(struct mtd_info *mtd, loff_t ofs) { struct mtd_oob_ops ops; struct sm_oob oob; int ret, error = 0; 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) { printk(KERN_NOTICE "sm_common: can't mark sector at %i as bad\n", (int)ofs); error = -EIO; } else mtd->ecc_stats.badblocks++; return error; } static struct nand_flash_dev nand_smartmedia_flash_ids[] = { {"SmartMedia 1MiB 5V", 0x6e, 256, 1, 0x1000, 0}, {"SmartMedia 1MiB 3,3V", 0xe8, 256, 1, 0x1000, 0}, {"SmartMedia 1MiB 3,3V", 0xec, 256, 1, 0x1000, 0}, {"SmartMedia 2MiB 3,3V", 0xea, 256, 2, 0x1000, 0}, {"SmartMedia 2MiB 5V", 0x64, 256, 2, 0x1000, 0}, {"SmartMedia 2MiB 3,3V ROM", 0x5d, 512, 2, 0x2000, NAND_ROM}, {"SmartMedia 4MiB 3,3V", 0xe3, 512, 4, 0x2000, 0}, {"SmartMedia 4MiB 3,3/5V", 0xe5, 512, 4, 0x2000, 0}, {"SmartMedia 4MiB 5V", 0x6b, 512, 4, 0x2000, 0}, {"SmartMedia 4MiB 3,3V ROM", 0xd5, 512, 4, 0x2000, NAND_ROM}, {"SmartMedia 8MiB 3,3V", 0xe6, 512, 8, 0x2000, 0}, {"SmartMedia 8MiB 3,3V ROM", 0xd6, 512, 8, 0x2000, NAND_ROM}, {"SmartMedia 16MiB 3,3V", 0x73, 512, 16, 0x4000, 0}, {"SmartMedia 16MiB 3,3V ROM", 0x57, 512, 16, 0x4000, NAND_ROM}, {"SmartMedia 32MiB 3,3V", 0x75, 512, 32, 0x4000, 0}, {"SmartMedia 32MiB 3,3V ROM", 0x58, 512, 32, 0x4000, NAND_ROM}, {"SmartMedia 64MiB 3,3V", 0x76, 512, 64, 0x4000, 0}, {"SmartMedia 64MiB 3,3V ROM", 0xd9, 512, 64, 0x4000, NAND_ROM}, {"SmartMedia 128MiB 3,3V", 0x79, 512, 128, 0x4000, 0}, {"SmartMedia 128MiB 3,3V ROM", 0xda, 512, 128, 0x4000, NAND_ROM}, {"SmartMedia 256MiB 3,3V", 0x71, 512, 256, 0x4000 }, {"SmartMedia 256MiB 3,3V ROM", 0x5b, 512, 256, 0x4000, NAND_ROM}, {NULL,} }; #define XD_TYPEM (NAND_NO_AUTOINCR | NAND_BROKEN_XD) static struct nand_flash_dev nand_xd_flash_ids[] = { {"xD 16MiB 3,3V", 0x73, 512, 16, 0x4000, 0}, {"xD 32MiB 3,3V", 0x75, 512, 32, 0x4000, 0}, {"xD 64MiB 3,3V", 0x76, 512, 64, 0x4000, 0}, {"xD 128MiB 3,3V", 0x79, 512, 128, 0x4000, 0}, {"xD 256MiB 3,3V", 0x71, 512, 256, 0x4000, XD_TYPEM}, {"xD 512MiB 3,3V", 0xdc, 512, 512, 0x4000, XD_TYPEM}, {"xD 1GiB 3,3V", 0xd3, 512, 1024, 0x4000, XD_TYPEM}, {"xD 2GiB 3,3V", 0xd5, 512, 2048, 0x4000, XD_TYPEM}, {NULL,} }; int sm_register_device(struct mtd_info *mtd, int smartmedia) { struct nand_chip *chip = mtd->priv; int ret; chip->options |= NAND_SKIP_BBTSCAN; /* Scan for card properties */ ret = nand_scan_ident(mtd, 1, smartmedia ? nand_smartmedia_flash_ids : nand_xd_flash_ids); if (ret) return ret; /* Bad block marker position */ chip->badblockpos = 0x05; chip->badblockbits = 7; chip->block_markbad = sm_block_markbad; /* ECC layout */ if (mtd->writesize == SM_SECTOR_SIZE) chip->ecc.layout = &nand_oob_sm; else if (mtd->writesize == SM_SMALL_PAGE) chip->ecc.layout = &nand_oob_sm_small; else return -ENODEV; ret = nand_scan_tail(mtd); if (ret) return ret; return mtd_device_register(mtd, NULL, 0); } EXPORT_SYMBOL_GPL(sm_register_device); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>"); MODULE_DESCRIPTION("Common SmartMedia/xD functions");