[U-Boot] [RFC PATCH 2/2] usb: dfu: correct dfu buffer inited value

[Lukasz Majewski <l.majewski@samsung.com>]

Hi Bo,

First of all, sorry for a little delay.

> Hi Lukasz,
> 
> On 11/4/2013 18:17, Lukasz Majewski wrote:
> > Hi Bo,
> >
> >> After dfu buffer is initialized, the buffer should be all
> >> available, while not 0. Initialize its value to min(dfu_buf_size,
> >> dfu->r_left).
> >>
> >> Signed-off-by: Bo Shen <voice.shen@atmel.com>
> >>
> >> ---
> >>   drivers/dfu/dfu.c |    2 +-
> >>   1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
> >> index 65c6984..b8c8aa4 100644
> >> --- a/drivers/dfu/dfu.c
> >> +++ b/drivers/dfu/dfu.c
> >> @@ -288,7 +288,7 @@ int dfu_read(struct dfu_entity *dfu, void *buf,
> >> int size, int blk_seq_num) dfu->offset = 0;
> >>   		dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
> >>   		dfu->i_buf = dfu->i_buf_start;
> >> -		dfu->b_left = 0;
> >> +		dfu->b_left = min(dfu_buf_size, dfu->r_left);
> >>
> >
> > I've testd in on Trats. It causes dfu read to be performed two
> > times.
> 
> Have you apply these two patches together:
> [RFC PATCH 1/2] usb: dfu: decrease dfu->r_left along with the transfer
> [RFC PATCH 2/2] usb: dfu: correct dfu buffer inited value
> 

I did a "little" mistake when applying those patches. When both patches
are applied dfu works fine.

I've tested it on Trats (Exynos4210).

For:
[RFC PATCH 1/2] usb: dfu: decrease dfu->r_left along with the transfer
[RFC PATCH 2/2] usb: dfu: correct dfu buffer inited value

Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>

@ Marek,

Since I'm still struggling with internal firewall - Marek could you
apply those two patches to u-boot-usb tree?

Also please apply Heiko's patch:

[PATCH v3 3/5] usb, g_dnl: make iSerialNumber board configurable

Thanks in advance.


> I test this with dfu mmc.
> 
> Without these two patches, it will read file two times.
> --->8---
> U-Boot> dfu mmc 0
> GADGET DRIVER: usb_dnl_dfu
> reading image.bin
> 3049120 bytes read in 628 ms (4.6 MiB/s)
> reading image.bin
> 3049120 bytes read in 628 ms (4.6 MiB/s)
> ---8<---
> 
> with these two patches, it only read file one time.
> --->8---
> U-Boot> dfu mmc 0
> GADGET DRIVER: usb_dnl_dfu
> reading image.bin
> 3049120 bytes read in 628 ms (4.6 MiB/s)
> ---8<---
> 
> The result is opposite.
> 
> > Could you write a more verbose message to explain the problem that
> > you are trying to solve? I can _only_ suppose that you want to
> > read/write data from/to NAND memory.
> >
> > So, I'm curious why dfu-util breaks with your setup but works at
> > am335x. Both chips are supposed to use dfu_nand.c for performing
> > NAND read/write.
> 
> For the NAND upload, if without patch: [U-Boot,RFC] usb: dfu: make
> nand upload working (http://patchwork.ozlabs.org/patch/283886/)
> It doesn't work at my side. more information as following:
> --->8---
> $ ./dfu-util -l
> dfu-util 0.7
> 
> Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
> Copyright 2010-2012 Tormod Volden and Stefan Schmidt
> This program is Free Software and has ABSOLUTELY NO WARRANTY
> Please report bugs to dfu-util at lists.gnumonks.org
> 
> Found Runtime: [413c:8187] devnum=0, cfg=1, intf=3, alt=0,
> name="UNDEFINED" Found DFU: [03eb:6156] devnum=0, cfg=1, intf=0,
> alt=0, name="sama5d34ek.dtb" Found DFU: [03eb:6156] devnum=0, cfg=1,
> intf=0, alt=1, name="uImage" Found DFU: [03eb:6156] devnum=0, cfg=1,
> intf=0, alt=2, name="rootfs.ubi"
> 
> $ ./dfu-util -d 03eb:6156 -U kernel.image -a 1
> dfu-util 0.7
> 
> Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
> Copyright 2010-2012 Tormod Volden and Stefan Schmidt
> This program is Free Software and has ABSOLUTELY NO WARRANTY
> Please report bugs to dfu-util at lists.gnumonks.org
> 
> Filter on vendor = 0x03eb product = 0x6156
> Opening DFU capable USB device... ID 03eb:6156
> WARNING: Can not find cached DFU functional descriptor
> Warning: Assuming DFU version 1.0
> Run-time device DFU version 0100
> Found DFU: [03eb:6156] devnum=0, cfg=1, intf=0, alt=1, name="uImage"
> Claiming USB DFU Interface...
> Setting Alternate Setting #1 ...
> Determining device status: state = dfuUPLOAD-IDLE, status = 0
> aborting previous incomplete transfer
> Determining device status: state = dfuIDLE, status = 0
> dfuIDLE, continuing
> Error obtaining cached DFU functional descriptor
> DFU mode device DFU version 0110
> Device returned transfer size 4096
> bytes_per_hash=4096
> Copying data from DFU device to PC
> Starting upload: [] finished!
> ---8<---
> 
> It doesn't transfer anything.
> 
> After apply the patch for NAND upload, it works OK. And only perform
> one time reading.
> 
> >
> >>   		dfu->bad_skip = 0;
> >>
> 
> Best Regards,
> Bo Shen
> 



-- 
Best regards,

Lukasz Majewski

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