Hi, Thanks a ton for the direction. I got the IRQ problem resolved. and I can use the Compact Flash attatchd to USB with USB reader.
At present i am looking for a patch/suggestion which would help me mounting my root file system on compact flash. The kernel and bootloader are in FLASH and can boot fine. But in development phase i want to use root file system Compact Flash. I appreciate the help i got from the list. Thanks again. Best Regards, Lara --- Greg Ungerer <[EMAIL PROTECTED]> wrote: > Hi Lara John, > > Lara John wrote: > > I am trying to port embedded linux kernel (ver. > > 2.4.26) on MS7751RCP01. > > > > This board has got NEC's usb 2.0 UHCI host > controller. > > > > I am facing followoing problems. > > > > 1) This controller is detected by the kernel on > boot > > time, but it is probing the wrong IRQ. (The IRQ to > IRL > > is managed by the FPGA), the kernel should > allocate > > IRQ 9 but the messages says it is IRQ 10 > > The allocation of IRQ's is machine specific, you > need to > find the code for your machine in your kernel > version. > > This being wrong is a possible (even likely) cause > of your system hanging when you have a USB device > on the bus. > > Regards > Greg > > > > > > The /proc/bus/usb/devices says: > > T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 > > Spd=12 MxCh= 1 > > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 > > #Cfgs= 1 > > P: Vendor=0000 ProdID=0000 Rev= 0.00 > > S: Product=USB OHCI Root Hub > > S: SerialNumber=fd001000 > > C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA > > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 > Prot=00 > > Driver=hub > > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms > > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 > > Spd=12 MxCh= 1 > > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 > > #Cfgs= 1 > > P: Vendor=0000 ProdID=0000 Rev= 0.00 > > S: Product=USB OHCI Root Hub > > S: SerialNumber=fd000000 > > C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA > > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 > Prot=00 > > Driver=hub > > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms > > > > 2) I am trying to mount SD Card (MMC) on USB with > usb > > reader. I have selected the build in option for > SCSI > > Storage and USB storage related. If i boot the > kernel > > without this device, it goes fine, but as soon as > i > > attatch the USB reader with SD card, it hangs (no > > panic.. seems that it is in some ageless loop :( ) > > > > The last message it gave is as follows: > > hub.c: new USB device 00:03.0-1, assigned address > 2 > > > > > > Please help me resolving this issue. If the > solution > > related to it is already resolved in newer > releases > > please let me know. > > > > Thanks in advance. > > > > Best regards, > > Lara John > > > > PS: If any information is missing please let me > know. > > > > > > > > __________________________________ > > Do you Yahoo!? > > Yahoo! Small Business - Try our new resources > site! > > http://smallbusiness.yahoo.com/resources/ > > _______________________________________________ > > uClinux-dev mailing list > > [EMAIL PROTECTED] > > > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > > This message was resent by [EMAIL PROTECTED] > > > > -- > ------------------------------------------------------------------------ > Greg Ungerer -- Chief Software Dude EMAIL: > [EMAIL PROTECTED] > SnapGear -- a CyberGuard Company PHONE: > +61 7 3435 2888 > 825 Stanley St, FAX: > +61 7 3891 3630 > Woolloongabba, QLD, 4102, Australia WEB: > http://www.SnapGear.com > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
