[U-Boot] MXS NAND: DMA read error

[Marek Vasut]

Dear Lauri Hintsala,

> Hello,
> 
> I'm trying to compile latest U-Boot to mx28evk (rev D) with NAND
> support. U-Boot boots up but NAND chip is not detected and DMA read
> error is popped up.

MX28 EVK has no NAND, right?

Otherwise, check if you have APBH DMA enabled in your include/configs/mx28evk.h

btw Fabio, can you please ping me on jabber?

> Here is console output:
> 
> U-Boot 2012.04-rc2-dirty (Apr 17 2012 - 10:58:50)
> 
> Freescale i.MX28 family at 454 MHz
> DRAM:  128 MiB
> NAND:  MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: Error sending command
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: Error sending command
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> MXS NAND: DMA read error (-110)
> No NAND device found!!!
> 0 MiB
> 
> 
> I did following changes to mainline code. Did I forget something?
> 
> diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
> index 9c95811..93e54da 100644
> --- a/drivers/mtd/nand/mxs_nand.c
> +++ b/drivers/mtd/nand/mxs_nand.c
> @@ -465,7 +465,7 @@ static void mxs_nand_read_buf(struct mtd_info *mtd,
> uint8_t *buf, int length)
>   	/* Execute the DMA chain. */
>   	ret = mxs_dma_go(channel);
>   	if (ret) {
> -		printf("MXS NAND: DMA read error\n");
> +		printf("MXS NAND: DMA read error (%d)\n", ret);
>   		goto rtn;
>   	}
> 
> diff --git a/include/configs/mx28evk.h b/include/configs/mx28evk.h
> index 02f3366..a0bd2db 100644
> --- a/include/configs/mx28evk.h
> +++ b/include/configs/mx28evk.h
> @@ -148,6 +148,15 @@
>   #endif
> 
>   /*
> + * NAND
> + */
> +#define CONFIG_CMD_NAND
> +#define CONFIG_NAND_MXS
> +#define CONFIG_SYS_MAX_NAND_DEVICE	1
> +#define CONFIG_SYS_NAND_BASE		0x60000000
> +#define CONFIG_SYS_NAND_5_ADDR_CYCLE
> +
> +/*
>    * Ethernet on SOC (FEC)
>    */
>   #ifdef	CONFIG_CMD_NET
> 
> 
> BR,
> Lauri Hintsala

Best regards,
Marek Vasut