Dear all,
I am newbie in linux usb modules area. I am trying to
port embedded linux kernel (ver. 2.4.26) on
MS7751RCP01 (SuperH 7751R processor based t-engine
like reference board from Renesas).
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 /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.
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