forked from luck/tmp_suning_uos_patched
[MTD] [NAND] Blackfin NFC Driver: add support for the ECC layout the Blackfin bootrom uses
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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drivers/mtd/nand
@ -109,6 +109,18 @@ config MTD_NAND_BF5XX_HWECC
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Enable the use of the BF5XX's internal ECC generator when
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using NAND.
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config MTD_NAND_BF5XX_BOOTROM_ECC
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bool "Use Blackfin BootROM ECC Layout"
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default n
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depends on MTD_NAND_BF5XX_HWECC
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help
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If you wish to modify NAND pages and allow the Blackfin on-chip
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BootROM to boot from them, say Y here. This is only necessary
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if you are booting U-Boot out of NAND and you wish to update
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U-Boot from Linux' userspace. Otherwise, you should say N here.
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If unsure, say N.
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config MTD_NAND_RTC_FROM4
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tristate "Renesas Flash ROM 4-slot interface board (FROM_BOARD4)"
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depends on SH_SOLUTION_ENGINE
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@ -91,6 +91,41 @@ static const unsigned short bfin_nfc_pin_req[] =
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P_NAND_ALE,
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0};
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#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC
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static uint8_t bbt_pattern[] = { 0xff };
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static struct nand_bbt_descr bootrom_bbt = {
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.options = 0,
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.offs = 63,
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.len = 1,
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.pattern = bbt_pattern,
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};
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static struct nand_ecclayout bootrom_ecclayout = {
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.eccbytes = 24,
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.eccpos = {
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0x8 * 0, 0x8 * 0 + 1, 0x8 * 0 + 2,
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0x8 * 1, 0x8 * 1 + 1, 0x8 * 1 + 2,
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0x8 * 2, 0x8 * 2 + 1, 0x8 * 2 + 2,
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0x8 * 3, 0x8 * 3 + 1, 0x8 * 3 + 2,
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0x8 * 4, 0x8 * 4 + 1, 0x8 * 4 + 2,
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0x8 * 5, 0x8 * 5 + 1, 0x8 * 5 + 2,
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0x8 * 6, 0x8 * 6 + 1, 0x8 * 6 + 2,
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0x8 * 7, 0x8 * 7 + 1, 0x8 * 7 + 2
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},
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.oobfree = {
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{ 0x8 * 0 + 3, 5 },
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{ 0x8 * 1 + 3, 5 },
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{ 0x8 * 2 + 3, 5 },
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{ 0x8 * 3 + 3, 5 },
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{ 0x8 * 4 + 3, 5 },
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{ 0x8 * 5 + 3, 5 },
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{ 0x8 * 6 + 3, 5 },
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{ 0x8 * 7 + 3, 5 },
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}
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};
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#endif
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/*
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* Data structures for bf5xx nand flash controller driver
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*/
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@ -712,6 +747,11 @@ static int bf5xx_nand_probe(struct platform_device *pdev)
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/* setup hardware ECC data struct */
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if (hardware_ecc) {
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#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC
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chip->badblock_pattern = &bootrom_bbt;
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chip->ecc.layout = &bootrom_ecclayout;
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#endif
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if (plat->page_size == NFC_PG_SIZE_256) {
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chip->ecc.bytes = 3;
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chip->ecc.size = 256;
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