Date: Mon, 6 Mar 2017 12:35:48 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Markus Rechberger <mrechberger@gmail.com> Cc: freebsd-multimedia@freebsd.org Subject: Re: What is wrong with FreeBSD and USB Support Message-ID: <599369d4-5458-a61c-e28d-762c86e65a4b@selasky.org> In-Reply-To: <CA%2BO4pCL_g=0%2BpbpwFts294qhGw0jsG3HN1vqUNvcpgGUgaMCaA@mail.gmail.com> References: <CA%2BO4pCK4%2B1rE5ft4Boy_3xPdCxK31UtTQ2BYpnBUn5jxZr%2Bz_g@mail.gmail.com> <CA%2BO4pCJr5Bq-sgjzvZQB-mFRT6x7Tp3psga6f__V9Ag-=v-mhw@mail.gmail.com> <CA%2BO4pC%2Bf5xzOjENKSJu_sQeaiN3XL3WiTcRQvm4vVweQ71Xtrg@mail.gmail.com> <CA%2BO4pC%2B1t67ODF7bkyVhcojXTLnFkS28RbFAc%2Be-tjNncogMAQ@mail.gmail.com> <CA%2BO4pCLRJRFG8Sv6C=FK6myBDPdUfhNjZ88P=e1uuH2=ojB75w@mail.gmail.com> <1aff0983-deb6-2884-472c-bb1e1037275c@selasky.org> <CA%2BO4pCLLSgdFOpJvnrD_F5Zh1aOGQexjiKKSiPbpcsKWs8wgUQ@mail.gmail.com> <9d940886-5021-7208-fc19-477dcd573c7a@selasky.org> <CA%2BO4pCL_g=0%2BpbpwFts294qhGw0jsG3HN1vqUNvcpgGUgaMCaA@mail.gmail.com>
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On 03/06/17 12:14, Markus Rechberger wrote: > On Mon, Mar 6, 2017 at 12:04 PM, Hans Petter Selasky <hps@selasky.org> wrote: >> Hi, >> >> Issue 2: >> >> Looking at the log you sent I observe the following: >> >>> 11:39:43.395110 usbus1.2 >>> SUBM-BULK-EP=00000081,SPD=HIGH,NFR=10,SLEN=0,IVAL=0 >>> frame[0] READ 0 bytes >>> frame[1] READ 0 bytes >>> frame[2] READ 0 bytes >>> frame[3] READ 0 bytes >>> frame[4] READ 0 bytes >>> frame[5] READ 0 bytes >>> frame[6] READ 0 bytes >>> frame[7] READ 0 bytes >>> frame[8] READ 0 bytes >>> frame[9] READ 0 bytes >>> flags 0x10 <PROXY_BUFFER|0> >>> status 0x6a023 >>> <OPEN|TRANSFERRING|STARTED|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|CAN_CANCEL_IMMED|0> >>> 11:39:43.395115 usbus1.2 >>> DONE-BULK-EP=00000081,SPD=HIGH,NFR=1,SLEN=0,IVAL=0,ERR=STALLED >>> frame[0] READ 0 bytes >>> flags 0x10 <PROXY_BUFFER|0> >>> status 0x8a025 >>> <OPEN|DID_DMA_DELAY|STARTED|BDMA_ENABLE|BDMA_SETUP|DOING_CALLBACK|0> >> >> >> The first multi-BULK transfer that STALLs is programmed to only receive >> zero-length USB packets. Is that intentional? >> >> In the case above there is a missing code fragment like this, I suspect: >> >> for (x = 0; x != 10; x++) >> libusb20_tr_set_length(xfer, buffer_size, x); >> Hi, > seems to be intentional. > in the LIBUSB20_START_... section it will do a > libusb20_tr_setup_bulk(xfer, tb, urb->buffer_length, 250); The job submitted above, does not match the footprint of libusb20_tr_setup_bulk(). You have submitted a USB BULK transfer using libusb20_tr_set_total_frames(xfer, 10). Have you mixed USB ISOC and USB BULK? > > that should also set the length (otherwise it shouldn't work at all I guess) This line is correct for single-transfer BULK: libusb20_tr_setup_bulk(xfer, tb, urb->buffer_length, 250); > > The only explanation for that problem is that freebsd is not reading > the data fast enough and lets the chip overflow (=requiring to reset). --HPS
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