Re: regression with 8e8dce065088833fc418bfa5fbf035cb0726c04c: USB: use kfifo to buffer usb-generic serial writes

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Hello,

Am Dienstag, 27. Juli 2010, 01:19:01 schrieb David VomLehn:
> Alexander, and sense of how far it gets before hanging, first character, a
> bunch of characters, etc.

Here is the console output from that sam-ba tool:
> -I- Waiting ...
> -I- TCL platform : Linux
> -I- SAM-BA CDC 2.9 rc6 on : linux
> -I- Connection : /dev/ttyUSB0 (target(comType) = 1)
> -I- Board : at91sam9263-ek
> -I- Traces Level : 4
> -I- target(handle) : file5
> Read device Chip ID at 0xfffff240 --- get 0x00000000
> Read device Chip ID at 0xffffee40 --- get 0x019607a2
> -I- Found processor : at91sam9263 (Chip ID : 0x019607a2)
> -I- External RAM Settings :  extRamVdd=1, extRamType=0, 
extRamDataBusWidth=32, extDDRamModel=0
> -I- Loading applet isp-extram-at91sam9263.bin at address 0x301000

And here it got stuck. I can't say much about the protocol though it is 
described in the controller's manual, something about xmodem is stated, but 
I'm not much into that. Summarized sam-ba talks to an application stored in 
the internal ROM of the controller.
As you can see, at least some data is written and read, because i could detect 
which processor the device has attached. But the problem arises if a binary is 
downloaded into sram of the controller. Oh, and if I retry to start sam-ba 
after it got stuck first, if stop at the line "-I- target(handle) : file5" 
where, I guess, it writes/reads to the device first in that session.

> > Alexander, does the 2.6.35-rc6 kernel also have this problem?

Yes, I'm currently running 2.6.35-rc6 and the problem still occurs.

Best regards,
Alexander
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