From 5fd30ed78539e11c2c155001a88f483441a96ebd Mon Sep 17 00:00:00 2001 From: Markus Hoffrogge Date: Thu, 30 Jun 2022 01:26:39 +0200 Subject: [PATCH] sunxi-nand: fix the PIO instead of DMA implementation 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 Reviewed-by: Andre Przywara Signed-off-by: Andre Przywara --- 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); -- 2.39.5