[U-Boot] [PATCH 4/5] mtd/nand: Add ONFI support for FSL NAND controller

[Scott Wood <scottwood@freescale.com>]

On 12/08/2011 04:49 AM, Shengzhou Liu wrote:
> - fix NAND_CMD_READID command for ONFI detect.
> - add NAND_CMD_PARAM command to read the ONFI parameter page.
> 
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
> ---
>  drivers/mtd/nand/fsl_elbc_nand.c |   19 ++++++++++++-------
>  1 files changed, 12 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
> index 4d1e527..52362b1 100644
> --- a/drivers/mtd/nand/fsl_elbc_nand.c
> +++ b/drivers/mtd/nand/fsl_elbc_nand.c
> @@ -340,20 +340,25 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
>  
>  	/* READID must read all 5 possible bytes while CEB is active */
>  	case NAND_CMD_READID:
> -		vdbg("fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
> +	case NAND_CMD_PARAM:
> +		vdbg("fsl_elbc_cmdfunc: NAND_CMD 0x%x.\n", command);
>  
>  		out_be32(&lbc->fir, (FIR_OP_CW0 << FIR_OP0_SHIFT) |
>  				    (FIR_OP_UA  << FIR_OP1_SHIFT) |
>  				    (FIR_OP_RBW << FIR_OP2_SHIFT));
> -		out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT);
> -		/* 5 bytes for manuf, device and exts */
> -		out_be32(&lbc->fbcr, 5);
> -		ctrl->read_bytes = 5;
> +		out_be32(&lbc->fcr, command << FCR_CMD0_SHIFT);
> +		/*
> +		 * although currently it's 8 bytes for READID, we always read
> +		 * the maximum 256 bytes(for PARAM)
> +		 */
> +		out_be32(&lbc->fbcr, 256);
> +		ctrl->read_bytes = 256;
>  		ctrl->use_mdr = 1;
> -		ctrl->mdr = 0;
> -
> +		ctrl->mdr = column;
>  		set_addr(mtd, 0, 0, 0);
>  		fsl_elbc_run_command(mtd);
> +		if (mtd->writesize > 2048)
> +			memcpy_fromio(ctrl->buffer, ctrl->addr, 256);

This memcpy_fromio looks like leakage from patch 5/5.

-Scott