From fcb90ba7e9ba9a17ca5103be3f3ae3a446dadc14 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 30 Jul 2008 12:35:01 -0700 Subject: [PATCH] [MTD] [NAND] Blackfin NFC Driver: add support for the ECC layout the Blackfin bootrom uses Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- drivers/mtd/nand/Kconfig | 12 +++++++++++ drivers/mtd/nand/bf5xx_nand.c | 40 +++++++++++++++++++++++++++++++++++ 2 files changed, 52 insertions(+) diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 71406e5178..c075b47e11 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -109,6 +109,18 @@ config MTD_NAND_BF5XX_HWECC Enable the use of the BF5XX's internal ECC generator when using NAND. +config MTD_NAND_BF5XX_BOOTROM_ECC + bool "Use Blackfin BootROM ECC Layout" + default n + depends on MTD_NAND_BF5XX_HWECC + help + If you wish to modify NAND pages and allow the Blackfin on-chip + BootROM to boot from them, say Y here. This is only necessary + if you are booting U-Boot out of NAND and you wish to update + U-Boot from Linux' userspace. Otherwise, you should say N here. + + If unsure, say N. + config MTD_NAND_RTC_FROM4 tristate "Renesas Flash ROM 4-slot interface board (FROM_BOARD4)" depends on SH_SOLUTION_ENGINE diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c index fc58afe473..3555f6b3eb 100644 --- a/drivers/mtd/nand/bf5xx_nand.c +++ b/drivers/mtd/nand/bf5xx_nand.c @@ -91,6 +91,41 @@ static const unsigned short bfin_nfc_pin_req[] = P_NAND_ALE, 0}; +#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC +static uint8_t bbt_pattern[] = { 0xff }; + +static struct nand_bbt_descr bootrom_bbt = { + .options = 0, + .offs = 63, + .len = 1, + .pattern = bbt_pattern, +}; + +static struct nand_ecclayout bootrom_ecclayout = { + .eccbytes = 24, + .eccpos = { + 0x8 * 0, 0x8 * 0 + 1, 0x8 * 0 + 2, + 0x8 * 1, 0x8 * 1 + 1, 0x8 * 1 + 2, + 0x8 * 2, 0x8 * 2 + 1, 0x8 * 2 + 2, + 0x8 * 3, 0x8 * 3 + 1, 0x8 * 3 + 2, + 0x8 * 4, 0x8 * 4 + 1, 0x8 * 4 + 2, + 0x8 * 5, 0x8 * 5 + 1, 0x8 * 5 + 2, + 0x8 * 6, 0x8 * 6 + 1, 0x8 * 6 + 2, + 0x8 * 7, 0x8 * 7 + 1, 0x8 * 7 + 2 + }, + .oobfree = { + { 0x8 * 0 + 3, 5 }, + { 0x8 * 1 + 3, 5 }, + { 0x8 * 2 + 3, 5 }, + { 0x8 * 3 + 3, 5 }, + { 0x8 * 4 + 3, 5 }, + { 0x8 * 5 + 3, 5 }, + { 0x8 * 6 + 3, 5 }, + { 0x8 * 7 + 3, 5 }, + } +}; +#endif + /* * Data structures for bf5xx nand flash controller driver */ @@ -712,6 +747,11 @@ static int bf5xx_nand_probe(struct platform_device *pdev) /* setup hardware ECC data struct */ if (hardware_ecc) { +#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC + chip->badblock_pattern = &bootrom_bbt; + chip->ecc.layout = &bootrom_ecclayout; +#endif + if (plat->page_size == NFC_PG_SIZE_256) { chip->ecc.bytes = 3; chip->ecc.size = 256; -- 2.39.5