From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steve Rae <srae@broadcom.com>
Date: Fri, 29 Jan 2016 10:19:10 -0800
Subject: [U-Boot] question regarding USB gadget driver (dwc2)
In-Reply-To: <20160129174033.6ac53284@amdc2363>
References: <56A810EB.6010102@broadcom.com> <201601270235.17028.marex@denx.de>
 <56A8244E.3090109@broadcom.com> <20160129174033.6ac53284@amdc2363>
Message-ID: <56ABAD1E.3080905@broadcom.com>
List-Id: <u-boot.lists.denx.de>
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To: u-boot@lists.denx.de

Hi Lukasz,

On 16-01-29 08:40 AM, Lukasz Majewski wrote:
> Hi Steve,
>
>>
>>
>> On 16-01-26 05:35 PM, Marek Vasut wrote:
>>> On Wednesday, January 27, 2016 at 01:35:55 AM, Steve Rae wrote:
>>>> Hi Marek & Lukasz,
>>>>
>>>>
>>>> I have an issue running fastboot on my board (which is
>>>> USB_SPEED_HIGH):
>>>>
>>>>       => fastboot0
>>>>
>>>>       failed to enable in ep
>>>>
>>>>       failed to enable in ep
>>>>
>>>>       failed to enable in ep
>>>>
>>>> Because of this, fastboot does not even initialize properly, and I
>>>> need to "^C" to break out?
>>>>
>>>> I have traced this the following code in
>>>> "drivers/usb/gadget/dwc2_udc_otg.c":
>>>
>>> I will have to delegate this onto Lukasz, since he's the s3c gadget
>>> expert.
>>>
>>> Take a look at:
>>> [PATCH 1/2] usb: gadget: s3c_udc_otg: fixed max packet size check
>>> for ep_in in high speed
>>>
>>> Best regards,
>>> Marek Vasut
>>>
>> yes - I think that 'patchwork.ozlabs.org/patch/560029' would resolve
>> my issue
>> Thanks, Steve
>>
>
> Ok, I see the point. The above patch should not bring any regression,
> since if MPS < maxpacket(ep), then we will set the descriptor's
> wMaxPacketSize as ep->ep.maxpacket.
>
> I'm just wondering if you could share the wMaxPacketSize of your
> platform (lsusb -v on HOST).
>
> In my case it is:
> wMaxPacketSize     0x0200  1x 512 bytes
>
>
>

on host: lsusb -v
[... snip ...]
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x02  EP 2 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
[... snip ...]

Thanks, Steve