Markus Rechberger a écrit : > On 9/12/07, David & Anne-Sophie <[EMAIL PROTECTED]> wrote: > >> Markus Rechberger a écrit : >> >>> On 9/11/07, David & Anne-Sophie <[EMAIL PROTECTED]> wrote: >>> >>> >>>> Markus Rechberger a écrit : >>>> >>>> >>>>> On 9/10/07, David & Anne-Sophie <[EMAIL PROTECTED]> wrote: >>>>> >>>>> >>>>> >>>>>> David & Anne-Sophie a écrit : >>>>>> >>>>>> >>>>>> >>>>>>> Hello all, >>>>>>> I am trying to use my hybrid USB tuner on my NSLU2. >>>>>>> Tuner=Terratec cinergy XS >>>>>>> Driver=http://mcentral.de/wiki/index.php/Em2880 >>>>>>> I plugged it directly to the DISK-2 connector. On DISK-1 there is a >>>>>>> >> USB >> >>>>>>> hard-disk that contains the filesystems. >>>>>>> >>>>>>> The driver compiles fine on the standard debian etch kernel, and loads >>>>>>> perfectly. >>>>>>> I just did a minor patch of this driver around a udelay(2500); -> >>>>>>> udelay(2000);udelay(500); (2500 is a too big value for the ARM >>>>>>> architecture, see bad_udelay). >>>>>>> >>>>>>> When I try tzap to activate the dvb-t stream, I get those errors: >>>>>>> ehci_hcd 0000:00:01.2: alloc_safe_buffer: could not alloc dma memory >>>>>>> (size=36096) >>>>>>> ehci_hcd 0000:00:01.2: map_single: unable to map unsafe buffer >>>>>>> >> ffc2c000! >> >>>>>>> many times (I think one per USB packet). >>>>>>> And the tuner does not stream anything... >>>>>>> >>>>>>> I did not modify anything in the NSLU2 (neither RAM or frequency), >>>>>>> >> just >> >>>>>>> upgraded to debian etch arm architecture following the nslu2-linux.org >>>>>>> tutorials. >>>>>>> Do you know what it means and how to solve the issue? >>>>>>> Do not hesitate to ask for specific information. >>>>>>> >>>>>>> Thanks! >>>>>>> Cheers, >>>>>>> David. >>>>>>> [EMAIL PROTECTED] >>>>>>> >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Em28xx mailing list >>>>>>> Em28xx@mcentral.de >>>>>>> http://mcentral.de/mailman/listinfo/em28xx >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> I have some informations that can help you to resolve my problem. These >>>>>> informations comes from the newlist of debian-arm : >>>>>> In this forum, I said that the driver works correctly on a PC with >>>>>> ubuntu, and the response is : >>>>>> "Working on a PC does not mean the driver is correct. On a PC physical >>>>>> addresses match the kernel's point of view in general, while on the arm >>>>>> everything goes through interesting mappings, which make is essential >>>>>> for the driver to correctly use readX/writeX calls along with ioremap >>>>>> calls. Any attemps to directly access anything will fail on the arm >>>>>> while it almost always works on a PC. Not sure quite how that might >>>>>> impact a USB device, but even there the driver has to do DMA setup with >>>>>> corrected addresses, which again is not necesary on a PC but is on the >>>>>> arm. " >>>>>> >>>>>> >>>>>> >>>>>> >>>>> i'm at the suse conference this week there are some interesting people >>>>> around who're into the usb subsystem. >>>>> The em28xx driver makes use of the usb subsystem (which also includes >>>>> allocation of memory) >>>>> I'll try to get some answers tomorrow about this issue. >>>>> >>>>> Markus >>>>> >>>>> >>>>> >>>>> >>>>> >>>> Hello Markus, >>>> >>>> Do you have news about my problem ? >>>> >>>> >>> in em28xx.h there's a static defined value for the number of videopackets >>> #define EM28XX_NUM_PACKETS 40 >>> >>> try to lower that value by about the half or less this will allocate >>> less memory in the end. I'm not sure if that might out .. although >>> that was the only idea which came up after the talk yesterday. Let me >>> know if it works out otherwise I'll have a further discussion about it >>> with the usb guys. >>> >>> Markus >>> >>> >>> >>> >> Hello Markus, >> >> I tried your patch. I set the value to 20. Now tzap seems to work >> correctly (tzap -r -c channels.conf "TF1", for exemple) and I don't have >> any error with dmesg. But, when i try cat / /dev/dvb/adapter0/dvr0 > >> test.ts/, the file is still empty ? and with cp /dev/dvb/adapter0/dvr0 >> foo, the command doesn't leave immediatly, I must break the command to >> leave ? >> Do you have an idea ? >> > > Could you try to dump the stream with mplayer? > If this doesn't work out we'll add some debug for the usb packets. I > only have 2 days left to discuss this issue with the right guys here. > > Markus > > > Sorry, but it is impossible to use mplayer on a nslu2. It doesn't have a video card. I have only a ssh connection. You can see some informations about it here : http://www.nslu2-linux.org/ For information, the scan command doesn't work too.
Thanks David _______________________________________________ Em28xx mailing list Em28xx@mcentral.de http://mcentral.de/mailman/listinfo/em28xx
