Re: [U-Boot] [UBOOT RFC PATCH 07/13] usb: gadget: g_dnl: Explicitly set the max packet size in descriptor

On Monday 18 August 2014 08:26 PM, Lukasz Majewski wrote:

Hi Kishon,

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Explicity set the max packet size in the device descriptor to 0x40 as specified in the device class specification for device firmware upgrade. Also changed debug to printf to explicitly notify the user if the device has been enumerated.

It seems like this patch slipped without my attention ...

Hence, I'd like to ask why you must hardcode the packet size here?

http://www.usb.org/developers/devclass_docs/usbdfu10.pdf (in section 4.2.1 DFU Mode Device Descriptor), specifies the bMaxPacketSize0 can be 8,16,32,64. And the value we get from gadget is 512. So hard coded it.

Thanks Kishon