Re: [Em28xx] ehci_hcd map_single: unable to map unsafe buffer on a standard NSLU2

On 9/20/07, Thierry Merle <[email protected]> wrote:
> Hi Markus,
>
> To sum up:
> - on David's NSLU2, his tuner makes dma errors in ehci_hcd module.
> - on my NSLU2, his tuner if I plug his tuner directly on the NSLU2 with
> the v4l-dvb-experimental tree, I get a i2c error.
> With a hub plugging the device freezes the kernel but I have not wired
> the serial line to see a kernel oops).
> Attached is the /var/log/messages corresponding to my try.
>
> The NSLU2 is a based on a IXP420 CPU (ARMv5TE architecture). The
> internal USB driver is not used, on the PCI bus a NEC USB chip is connected.
> See http://www.nslu2-linux.org/wiki/Info/CPUOverview for all infos.
>
> On the debian-arm ML, Lennart Sorensen invoked a CPU usage problem but
> he was talking about the MPEG-TS stream processing.
> My cinergyT2 can stream at 33% CPU user consumption on the NSLU2.
>

Sep 20 23:05:56 shagrat kernel: Em28xx: Initialized (Em28xx Audio
Extension) extension
Sep 20 23:05:57 shagrat kernel: em2880-dvb.c: DVB Init
Sep 20 23:05:57 shagrat kernel: Loading base firmware: xc3028_8MHz_init0.i2c.fw
Sep 20 23:05:57 shagrat kernel: xc3028-tuner.c: Unable to load firmware
Sep 20 23:05:57 shagrat kernel: xc3028-tuner.c: ** PLEASE HAVE A LOOK AT **
Sep 20 23:05:57 shagrat kernel: xc3028-tuner.c:
http://linuxtv.org/v4lwiki/index.php/Talk:Em2880#Firmware

is udev started or even the right version of udev installed?
otherwise you won't be able to load the firmware..

Markus

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