The sunxi nand SPL loader was broken at least for SUN4I, SUN5I and SUN7I SOCs since the implementation change from DMA to PIO usage - commit 6ddbb1e.
Root cause for this issue is the NFC control flag NFC_CTL_RAM_METHOD being set by method nand_apply_config.
This flag controls the bus being used for the NFCs internal RAM access. It must be set for the DMA use case only. See A33_Nand_Flash_Controller_Specification.pdf page 12.
This fix is tested by myself on a Cubietruck A20 board. Others should test it on new generation SOCs as well.
Signed-off-by: Markus Hoffrogge mhoffrogge@gmail.com --- drivers/mtd/nand/raw/sunxi_nand_spl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/raw/sunxi_nand_spl.c b/drivers/mtd/nand/raw/sunxi_nand_spl.c index a29a76c58d..6de0b0a355 100644 --- a/drivers/mtd/nand/raw/sunxi_nand_spl.c +++ b/drivers/mtd/nand/raw/sunxi_nand_spl.c @@ -208,7 +208,7 @@ static void nand_apply_config(const struct nfc_config *conf)
val = readl(SUNXI_NFC_BASE + NFC_CTL); val &= ~NFC_CTL_PAGE_SIZE_MASK; - writel(val | NFC_CTL_RAM_METHOD | NFC_CTL_PAGE_SIZE(conf->page_size), + writel(val | NFC_CTL_PAGE_SIZE(conf->page_size), SUNXI_NFC_BASE + NFC_CTL); writel(conf->ecc_size, SUNXI_NFC_BASE + NFC_CNT); writel(conf->page_size, SUNXI_NFC_BASE + NFC_SPARE_AREA); --