On Fri, Feb 21, 2014 at 03:27:09PM +1300, Chris Kimber wrote: > Hey > > On 21/02/2014 2:14 p.m., Felipe Balbi wrote: > >Hi, > > > >(please avoid top-posting) > > > >On Fri, Feb 21, 2014 at 12:11:40AM +0000, Chris Kimber wrote: > >>Hey, > >> > >>Thanks for the response. > >> > >>I've disabled the DMA (CONFIG_MUSB_PIO_ONLY=y) but the problem still > >>persists (for both USB sticks & USB serial ports). > >hmm, that's weird. > > > >>Now it looks like dsps_interrupt() never fires and causes the hang > >>up... > >> > >>[ 94.865635] tty ttyUSB0: serial_write - 11 byte(s) > >>[ 94.865656] cp210x ttyUSB0: usb_serial_generic_write_start - length = 11, data = 54 45 53 54 49 4e 47 20 34 32 0a > >>[ 94.865680] musb-hdrc musb-hdrc.1.auto: qh ce461a00 periodic slot 10 > >>[ 94.865700] musb-hdrc musb-hdrc.1.auto: qh ce461a00 urb ce481e80 dev2 ep1out-bulk, hw_ep 10, ce43db00/11 > >>[ 94.865721] musb-hdrc musb-hdrc.1.auto: --> hw10 urb ce481e80 spd2 dev2 ep1out h_addr00 h_port00 bytes 11 > >>[ 94.865740] musb-hdrc musb-hdrc.1.auto: TX ep10 fifo d0832c48 count 11 buf ce43db00 > >>[ 94.865755] musb-hdrc musb-hdrc.1.auto: Start TX10 pio > >>[ 94.865792] musb-hdrc musb-hdrc.1.auto: usbintr (0) epintr(400) > >>[ 94.865810] musb-hdrc musb-hdrc.1.auto: ** IRQ host usb0000 tx0400 rx0000 > >>[ 94.865826] musb-hdrc musb-hdrc.1.auto: OUT/TX10 end, csr 2100 > >>[ 94.865866] musb-hdrc musb-hdrc.1.auto: complete ce481e80 usb_serial_generic_write_bulk_callback+0x0/0xd4 [usbserial] (0), dev2 ep1out, 11/11 > >so the first one completed just fine. > > > >>[ 94.865971] tty ttyUSB0: serial_write - 11 byte(s) > >>[ 94.865991] cp210x ttyUSB0: usb_serial_generic_write_start - length = 11, data = 54 45 53 54 49 4e 47 20 34 33 0a > >>[ 94.866015] musb-hdrc musb-hdrc.1.auto: qh ce461a00 periodic slot 10 > >>[ 94.866035] musb-hdrc musb-hdrc.1.auto: qh ce461a00 urb ce481e80 dev2 ep1out-bulk, hw_ep 10, ce43db00/11 > >>[ 94.866055] musb-hdrc musb-hdrc.1.auto: --> hw10 urb ce481e80 spd2 dev2 ep1out h_addr00 h_port00 bytes 11 > >>[ 94.866075] musb-hdrc musb-hdrc.1.auto: TX ep10 fifo d0832c48 count 11 buf ce43db00 > >>[ 94.866089] musb-hdrc musb-hdrc.1.auto: Start TX10 pio > >can you dump TXCSR, DEVCTL and IRQ registers when this happens ? > > > I added the IRQ registers to the debugfs interface.. > > IntrTX : 0000 > IntrRX : 0000 > IntrTXE : ffff > IntrRXE : fffe > IntrUSB : 08 > IntrUSBE : f7 > TxCSRp : 0000 > DevCtl : 5d > > Oddly the VBUSERR bit is set, if I disconnect the USB cable then it > goes to 0. I just tried plugging in via powered hub and that doesn't > change the status. that might be the issue you're having, then. for whatever reason VBUS level fluctuates and that confuses MUSB. I'll see if there's anyway to work around that. -- balbi
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