diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/gpmi_nfc_mil.c | 127 |
1 files changed, 19 insertions, 108 deletions
diff --git a/drivers/mtd/nand/gpmi_nfc_mil.c b/drivers/mtd/nand/gpmi_nfc_mil.c index f41a02e..c7b1350 100644 --- a/drivers/mtd/nand/gpmi_nfc_mil.c +++ b/drivers/mtd/nand/gpmi_nfc_mil.c @@ -3,7 +3,7 @@ * * Copyright (C) 2008 Embedded Alley Solutions, Inc. * - * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. + * Copyright (C) 2010-2012 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -35,6 +35,22 @@ #include <asm/arch/mmu.h> #endif +/* add our owner bbt descriptor */ +static uint8_t scan_ff_pattern[] = { 0xff }; +static struct nand_bbt_descr gpmi_bbt_descr = { + .options = 0, + .offs = 0, + .len = 1, + .pattern = scan_ff_pattern +}; + +/* We will use all the (page + OOB). */ +static struct nand_ecclayout gpmi_hw_ecclayout = { + .eccbytes = 0, + .eccpos = { 0, }, + .oobfree = { {.offset = 0, .length = 0} } +}; + /** * gpmi_nfc_cmd_ctrl - MTD Interface cmd_ctrl() * @@ -848,113 +864,6 @@ static int gpmi_nfc_scan_bbt(struct mtd_info *mtd) MTDDEBUG(MTD_DEBUG_LEVEL3, "%s =>\n", __func__); - /* - * Tell MTD users that the out-of-band area can't be written. - * - * This flag is not part of the standard kernel source tree. It comes - * from a patch that touches both MTD and JFFS2. - * - * The problem is that, without this patch, JFFS2 believes it can write - * the data area and the out-of-band area separately. This is wrong for - * two reasons: - * - * 1) Our NFC distributes out-of-band bytes throughout the page, - * intermingled with the data, and covered by the same ECC. - * Thus, it's not possible to write the out-of-band bytes and - * data bytes separately. - * - * 2) Large page (MLC) Flash chips don't support partial page - * writes. You must write the entire page at a time. Thus, even - * if our NFC didn't force you to write out-of-band and data - * bytes together, it would *still* be a bad idea to do - * otherwise. - */ - - /* mtd->flags &= ~MTD_OOB_WRITEABLE; */ - - /* - * MTD identified the attached NAND Flash devices, but we have a much - * better database that we want to consult. First, we need to gather all - * the ID bytes from the first chip (MTD only read the first two). - */ - - saved_chip_number = gpmi_info->cur_chip; - - /* Read ID bytes from the first NAND Flash chip. */ - nand->select_chip(mtd, 0); - - nand->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); - nand->read_buf(mtd, id_bytes, NAND_DEVICE_ID_BYTE_COUNT); - - nand->select_chip(mtd, saved_chip_number); - - /* Look up this device in our database. */ - dev_info = nand_device_get_info(id_bytes); - - /* Check if we understand this device. */ - if (!dev_info) { - printf("Unrecognized NAND Flash device.\n"); - return !0; - } - - /* Display the information we discovered. */ - nand_device_print_info(dev_info); - - layout->eccbytes = 0; - - /* Correct mtd setting */ - mtd->size = dev_info->chip_size_in_bytes * nand->numchips; - - mtd->writesize = 1 << (fls(dev_info->page_total_size_in_bytes) - 1); - mtd->oobsize = dev_info->page_total_size_in_bytes - mtd->writesize; - mtd->erasesize = dev_info->block_size_in_pages * mtd->writesize; - - mtd->ecclayout = layout; - mtd->oobavail = mtd->oobsize; - mtd->subpage_sft = 0; /* We don't support sub-page writing. */ - - /* Configure the struct nand_ecclayout. */ - layout->eccbytes = 0; - layout->oobavail = mtd->oobsize; - layout->oobfree[0].offset = 0; - layout->oobfree[0].length = mtd->oobsize; - - nand->ecc.layout = layout; - - /* Configure the struct nand_chip. */ - /* - nand->page_shift = ffs(mtd->writesize) - 1; - nand->pagemask = (nand->chipsize >> nand->page_shift) - 1; - nand->subpagesize = mtd->writesize >> mtd->subpage_sft; - nand->phys_erase_shift = ffs(mtd->erasesize) - 1; - nand->bbt_erase_shift = nand->phys_erase_shift; - nand->chip_shift = ffs(nand->chipsize) - 1; - nand->oob_poi = nand->buffers->databuf + mtd->writesize; - */ - nand->phys_erase_shift = ffs(mtd->erasesize) - 1; - nand->ecc.layout = layout; - nand->ecc.size = 512; - /* - nand->ecc.steps = mtd->writesize / nand->ecc.size; - nand->ecc.total = nand->ecc.steps * nand->ecc.bytes; - */ - /* - if (nand->chipsize & 0xffffffff) - nand->chip_shift = ffs((u32)nand->chipsize) - 1; - else - nand->chip_shift = - ffs((u32)(nand->chipsize >> 32)) + 32 - 1; - */ - - /* limit to 2G size due to Kernel - * larger 4G space support,need fix - * it later - */ - if ((u32)mtd->size == 0) { - mtd->size = (u32)(1 << 31); - nand->numchips = 1; - nand->chipsize = mtd->size; - } gpmi_info->m_u32EccChunkCnt = GPMI_NFC_ECC_CHUNK_CNT(mtd->writesize); gpmi_info->m_u32EccStrength = @@ -1146,6 +1055,7 @@ int board_nand_init(struct nand_chip *nand) chip->erase_cmd = NULL; chip->write_page = NULL; chip->scan_bbt = gpmi_nfc_scan_bbt; + chip->badblock_pattern = &gpmi_bbt_descr; /* * Error Recovery Functions * @@ -1163,6 +1073,7 @@ int board_nand_init(struct nand_chip *nand) chip->ecc.read_page_raw = NULL; chip->ecc.write_page_raw = NULL; chip->ecc.read_page = gpmi_nfc_ecc_read_page; + chip->ecc.layout = &gpmi_hw_ecclayout; /* * Set up NAND Flash options. Specifically: * |