Hello Friends,
I am having difficulty getting an M-Systems USB Flash
Disk to work for me. I'm looking for advice/general
discussion on what I could do to get further in my
debug described below. The USB Flash Disk works fine
in a Redhat 8.0 (2.4.18-14) system on an intel chipset
based x86 box. I am able to mount the device,
read/write files etc. (Kudos to the team for that! It
works straight out of the box). But...
I take the same device to my embedded box. On this
box, upon insmoding usb-storage.o, insmod goes
uninterruptible. this same embedded box works fine
when using the ov511 usb webcam so i don't suspect the
usb subsystem or the OHCI controller itself.
Now for the details. on both boxes, i am using a
2.4.18 (-14 redhat 8.0) kernel. The x86 box has an
intel chipset so it's an UHCI controller (i think) and
it works fine there. on the embedded box, i believe
it's a OHCI controller. the output of
/proc/usb/devices seems to correctly reflect this
information. [appended]
# cat devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1
Spd=12 MxCh= 2
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=c2813000
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=01 Prnt=01 Port=00 Cnt=01 Dev#= 2
Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8
#Cfgs= 1
P: Vendor=08ec ProdID=0822 Rev= 3.2e
S: Manufacturer=Generic
S: Product=USB Flash Disk
S: SerialNumber=ABCD002592
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=08(stor.) Sub=06 Prot=50
Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3
Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8
#Cfgs= 1
P: Vendor=05a9 ProdID=0511 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 992 Ivl=1ms
I: If#= 0 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 993 Ivl=1ms
I: If#= 0 Alt= 2 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 768 Ivl=1ms
I: If#= 0 Alt= 3 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 769 Ivl=1ms
I: If#= 0 Alt= 4 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 512 Ivl=1ms
I: If#= 0 Alt= 5 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 513 Ivl=1ms
I: If#= 0 Alt= 6 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 257 Ivl=1ms
I: If#= 0 Alt= 7 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00
Driver=ov511
E: Ad=81(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
===
S: Product=USB Flash Disk
S: SerialNumber=ABCD002592
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=08(stor.) Sub=06 Prot=50
Driver=(none)
As you can see above, the flash disk device seems to
be detected without any problem. So, now I proceed to
insmod scsi_mod.o and usb-storage.o. scsi_mod.o
insmods cleanly. insmod of usb-storage.o hangs.
checking ps shows:
721 root 432 D insmod ./usb-storage.o
722 root SW [usb-storage-0]
723 root SW [scsi_eh_0]
so it looks like usb-storage is waiting for some IO of
some sort. hence it's uninterruptible state. Looking
at dmesg outpupt and /proc/interrupts didn't lead me
to any further conclusions.
# dmesg
<snip>
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
scsi0 : SCSI emulation for USB Mass Storage devices
# cat /proc/interrupts
CPU0
0: 110998 XT-PIC timer
1: 2 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 10494 XT-PIC serial
4: 7269 XT-PIC serial
8: 0 XT-PIC rtc
10: 1679 XT-PIC eth1
11: 2039 XT-PIC usb-ohci, eth0
13: 0 XT-PIC fpu
NMI: 0
ERR: 0
Ok. That's about as far as I can get. I'll keep
looking for further information on what I can do to
debug this. I'd greatly appreciate any
pointers/recommendations on how I can get this
working. If there is any further information I could
supply that would help isolate the issue, please
holler. Oh, please CC me on your replies since I'm not
subscribed to the list.
Much thanks,
Melkor
__________________________________
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/
-------------------------------------------------------
This SF.net email is sponsored by: SF.net Giveback Program.
Does SourceForge.net help you be more productive? Does it
help you create better code? SHARE THE LOVE, and help us help
YOU! Click Here: http://sourceforge.net/donate/
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-users
