[U-Boot] USB DFU support into mailline.

[Tom Rini]

On 06/19/2012 01:56 AM, Lukasz Majewski wrote:
> Hi Tom,
> 
> Thank you for feedback.
> 
>> On Mon, Jun 18, 2012 at 04:12:50PM +0200, Lukasz Majewski wrote:
>>>
>>> Hi Harman,
>>>
>>>>> -----Original Message-----
>>>>> From: Lukasz Majewski [mailto:l.majewski at samsung.com]
>>>>> Sent: Monday, June 18, 2012 2:25 PM
>>>>> To: Marek Vasut
>>>>> Cc: u-boot at lists.denx.de; Sohanpal, Harman; Kyungmin Park
>>>>> Subject: Re: [U-Boot] USB DFU support into mailline.
>>>>>
>>>>> Dear All,
>>>>>
>>>>>> Dear Sohanpal, Harman,
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> Referring to
>>>>>>> http://elinux.org/Merge_DFU_support_into_mainline_U-Boot, it
>>>>>>> seems some work is going on for adding USB DFU support in
>>>>>>> the mainline for u-boot. But I could not find any code
>>>>>>> already in mainline. Is there anyone working on getting USB
>>>>>>> DFU support to mainline?
>>>>>>>
>>>>>>> I am working on USB DFU on AM335x BeagleBone, and I want
>>>>>>> help get USB DFU to mainline.
>>>>>>
>>>>>> Try looking through the u-boot mailing list. I think someone
>>>>>> tried, but it needed more work.
>>>>>>
>>>>>
>>>>> Dear Marek and Harman,
>>>>>
>>>>> I'm currently working on the DFU support at u-boot. A
>>>>> composite USB gadget with DFU support is under development.
>>>>
>>>> Hi Lukasz,
>>>>
>>>> Thanks for the reply.
>>>> When are you planning to send these patches to mailing list?
>>> Yes, of course I will send those patches to u-boot mailing list.
>>>
>>>> If you can point me to some branch having your code, maybe I
>>>> can also contribute to the work you have already done.
>>>
>>> You can look into the early DFU patches:
>>> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/116197/match=dfu+initial+implementation
>>>
>>> There DFU is implemented as a standalone USB gadget, but it will be
>>> a part of a composite one.
>>
>> Would it be fair to say that a prerequisite for using the DFU support
>> you are working on would be to have the composite driver
>> (drivers/usb/gadget/composite.c) 7010f5b usb:gadget:composite USB
>> composite gadget support
> 
> I've stated that I'm working on a composite USB gadget, which provides
> DFU function.
> 
> The composite.c code is already in u-boot mainline (SHA1: 7010f5b
> usb:gadget:composite USB composite gadget support). It is a Linux
> kernel's composite driver from 2.6.36 ported to u-boot (no API change).
> 
> All one needs is the UDC driver (like s3c_udc_otg or
> designware_udc.c, omap_*_udc or pxa27_udc) to run composite gadget.
> 
>> working with the musb framework?
> 
> The composite gadget uses Linux kernel's API for writing composite
> gadgets. I don't know if it is compatible with musb framework.

I'm assuming then that musb_udc provides the glue needed here.  Harman,
a good first step then for USB DFU on the beaglebone / am335x EVM would
be to get MUSB working (and say using usbtty as a test).

-- 
Tom