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....@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
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