Date: Sun, 24 Apr 2022 11:58:00 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Peter Jeremy <peterj@freebsd.org>, freebsd-arm@freebsd.org, freebsd-usb@freebsd.org Subject: Re: USB-OTG on BananaPi M1 Message-ID: <1b0031a4-6934-e9d2-e782-e7c9c0293c71@selasky.org> In-Reply-To: <YmSoduTyzSfTbvQh@server.rulingia.com> References: <YmSoduTyzSfTbvQh@server.rulingia.com>
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On 4/24/22 03:31, Peter Jeremy wrote: > 11:02:59.641528 usbus0.2 DONE-CTRL-EP=00000000,SPD=HIGH,NFR=1,SLEN=8,IVAL=0,ERR=0 > frame[0] READ 8 bytes > 0000 A3 77 65 86 A3 77 65 86 -- -- -- -- -- -- -- -- |.we..we. | Hi, This byte sequence looks like garbage. It should be idential to that of the host side. If this happens after a while if means that the OTG FIFO size is incorrectly set, see this printout: > usbus0: Dynamic FIFO sizing detected, assuming 16Kbytes of FIFO RAM ^^^ try having a look in the driver where this comes from. Try setting 8Kbytes or 1KBytes. --HPS
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