[Prism54-devel] XH8196 driver analysis

[Jean-Baptiste Note]

Hi Sebastien,

> Ok, it works now, with offset 20. But I must use the firmware image provided 
> in the XH8196 archive, I've tried with first-generation firmwares and the 
> WG111 2.5.8.0 firmware ; the "bra" parsing fails.

Okay, thanks; i had never tried at offset 20 on the given firmware. I'll
map this into the driver ; then we'll be able to get users to test
it. Any idea what the "x2" file format is (and what the 16 octets header
means ?) ?

> I'm thinking about writing a program with a command-line interface (quite easy 
> to implement with libreadline) which will have commands to request the UMAC 
> library to perform a specific task (we will have quite a good control over 
> this, using the API...) and then dump what it would have sent to the device 
> (and why not send it actually, it's quite easy with libusb, and we will get 
> real replies. But the main problem is to work an USB device with a 
> second-generation firmware...)

Have a look at the logs, mapping from second generation protocol to
first-generation protocol seems rather easy.

For what is sent and received, have a look at usb_softmac.c, and the
calls to 
 ic_message_handle
and 
 ic_message_query 

in sm_drv_usb_bh in file sm_drv_usb.c

PS: any docs and/or example code for libusb ?

JB

-- 
Jean-Baptiste Note
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jean-baptiste.note at wanadoo.fr