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From: Nataraj S Narayan <natarajsn@gmail.com>
To: barebox@lists.infradead.org
Subject: barebox and hardware_ecc
Date: Thu, 25 Aug 2011 04:51:51 +0000	[thread overview]
Message-ID: <CAK8HZO+K_PN2ojFMdV_T3z_owSSs2Vr-JUK607Hcf8UGfqRMbg@mail.gmail.com> (raw)

Hi

Does barebox use by default hardware ECC on nand flash ?  I am on an
at91sam9263 board.

A previous mail by Sascha says that barebox uses hardware ecc while
u-boot uses software ecc by default.

After writing a  ubifs using:-

"tftp rootfs.ubifs.nat /dev/ubi0.data " ,

I  am able boot using a kernel that has MTD_NAND_ATMEL_ECC_SOFT,

but not with a kernel that has  MTD_NAND_ATMEL_ECC_HW.

Am I missing something? Tried adding  an ecc_mode in the following,
but in vain:-

static struct memory_platform_data ram_pdata = {
@@ -96,7 +96,12 @@ void at91_add_device_nand(struct atmel_nand_data *data)

        if (!data)
                return;
+/* Nataraj*************/
+
+        data->ecc_base = (void __iomem *)(AT91_BASE_SYS + AT91_ECC0);
+        data->ecc_mode = NAND_ECC_HW;

+/* Nataraj ************/
        csa = at91_sys_read(AT91_MATRIX_EBI0CSA);
        at91_sys_write(AT91_MATRIX_EBI0CSA, csa |
AT91_MATRIX_EBI0_CS3A_SMC_SMARTMEDIA);


May I have some help?

regards

Nataraj

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                 reply	other threads:[~2011-08-25  4:51 UTC|newest]

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