[U-Boot] [RFC PATCH] usb: dfu: make nand upload working

[Bo Shen <voice.shen@atmel.com>]

Hi Lukasz,

On 10/16/2013 17:00, Bo Shen wrote:
> Hi Lukasz Majewski,
>
> On 10/14/2013 15:25, Bo Shen wrote:
>> Hi Lukasz Majewski,
>>
>> On 10/13/2013 05:19, Lukasz Majewski wrote:
>>> On Sat, 12 Oct 2013 15:47:14 +0800
>>> Bo Shen <voice.shen@atmel.com> wrote:
>>>
>>>> If won't pass value to dfu->r_left, it always 0, make no transfer,
>>>> the dfu-util on host side report failed. So, before starting transfer,
>>>> pass the value, then nand uploading can work.
>>>>
>>>> Signed-off-by: Bo Shen <voice.shen@atmel.com>
>>>>
>>>> ---
>>>>   drivers/dfu/dfu.c |    1 +
>>>>   1 file changed, 1 insertion(+)
>>>>
>>>> diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
>>>> index 56b21c7..3c3ad1b 100644
>>>> --- a/drivers/dfu/dfu.c
>>>> +++ b/drivers/dfu/dfu.c
>>>> @@ -274,6 +274,7 @@ int dfu_read(struct dfu_entity *dfu, void *buf,
>>>> int size, int blk_seq_num) if (dfu->i_buf_start == NULL)
>>>>               return -ENOMEM;
>>>>
>>>> +        dfu->r_left = dfu->data.nand.size;
>>>
>>> Please do not add nand related code to "generic" DFU code. This can
>>> damage DFU operation with other memories (like eMMC).
>>>
>>> Such code shall be added to dfu_nand.c file.
>>
>> Thanks for point out this.
>> I will check it.
>
> After read more deeply into dfu core code, even we move this patch to
> nand related code as following.
> I think this only a workaround for NAND uploading, because it the same
> as mmc uploading, need the dfu buffer size equal or larger than the
> upload file size or partition size.
> So, does this acceptable? If acceptable, I will send v2.

Would it possible to check this for NAND uploading?

> ---8>---
> --- a/drivers/dfu/dfu_nand.c
> +++ b/drivers/dfu/dfu_nand.c
> @@ -121,6 +121,7 @@ static int dfu_read_medium_nand(struct dfu_entity
> *dfu, u64 offset, void *buf,
>
>          switch (dfu->layout) {
>          case DFU_RAW_ADDR:
> +               *len = dfu->data.nand.size;
>                  ret = nand_block_read(dfu, offset, buf, len);
>                  break;
>          default:
> ---<8---
>
> Best Regards,
> Bo Shen

Best Regards,
Bo Shen