From: Felipe Balbi <balbi@ti.com>
To: Chris Kimber <chris.kimber@enatel.net>
Cc: "balbi@ti.com" <balbi@ti.com>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>
Subject: Re: USB lockups on BeagleBone/AM335x
Date: Fri, 21 Feb 2014 09:33:21 -0600 [thread overview]
Message-ID: <20140221153321.GD31902@saruman.home> (raw)
In-Reply-To: <5306B97D.8070306@enatel.net>
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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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next prev parent reply other threads:[~2014-02-21 15:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-20 22:39 USB lockups on BeagleBone/AM335x Chris Kimber
2014-02-20 22:49 ` Felipe Balbi
2014-02-21 0:11 ` Chris Kimber
2014-02-21 1:14 ` Felipe Balbi
2014-02-21 2:27 ` Chris Kimber
2014-02-21 15:33 ` Felipe Balbi [this message]
2014-02-27 20:34 ` Chris Kimber
2014-02-27 20:52 ` Felipe Balbi
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