Merge branch 'master' of git://git.denx.de/u-boot-arm

[u-boot] / drivers / mtd / nand / davinci_nand.c

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 4ca738e45175fd7556b80f638a6645bb69321f1e..d41579c9cefb9e96531508e6f0ac95ed641799b6 100644 (file)
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -481,10 +481,24 @@ static int nand_davinci_4bit_correct_data(struct mtd_info *mtd, uint8_t *dat,
         * Set the addr_calc_st bit(bit no 13) in the NAND Flash Control
         * register to 1.
         */
-       __raw_writel(1 << 13, &davinci_emif_regs->nandfcr);
+       __raw_writel(DAVINCI_NANDFCR_4BIT_CALC_START,
+                       &davinci_emif_regs->nandfcr);
 
        /*
-        * Wait for the corr_state field (bits 8 to 11)in the
+        * Wait for the corr_state field (bits 8 to 11) in the
+        * NAND Flash Status register to be not equal to 0x0, 0x1, 0x2, or 0x3.
+        * Otherwise ECC calculation has not even begun and the next loop might
+        * fail because of a false positive!
+        */
+       i = NAND_TIMEOUT;
+       do {
+               val = __raw_readl(&davinci_emif_regs->nandfsr);
+               val &= 0xc00;
+               i--;
+       } while ((i > 0) && !val);
+
+       /*
+        * Wait for the corr_state field (bits 8 to 11) in the
         * NAND Flash Status register to be equal to 0x0, 0x1, 0x2, or 0x3.
         */
        i = NAND_TIMEOUT;