The problems of OHCI driver for Winbond W90N740.

Hello,
I'm porting uClinux for W90N740, the kernel is booted successful, but the USB Host has some problems. After the kernel is booted, I plug in a USB Card reader, the kernel outputs the following messages, I don't understand the messages, :(
The attachment is the HCD source code for W90N740. 
$ cat /proc/kmsg &
74
$ <5>Linux version 2.6.22-uc0 (root@DownloaderDevelopment) (gcc version 3.4.3) #479 Mon Oct 1 12:32:33 CST 2007
<4>CPU: Winbond-W90N740 [32103201] revision 1 (ARMvundefined/unknown), cr=00000000
<4>Machine: W90N740
<4>W90N740 cache init
<7>On node 0 totalpages: 4096
<7>  DMA zone: 32 pages used for memmap
<7>  DMA zone: 0 pages reserved
<7>  DMA zone: 4064 pages, LIFO batch:0
<7>  Normal zone: 0 pages used for memmap
<4>Built 1 zonelists.  Total pages: 4064
<5>Kernel command line: init=/linuxrc console=ttyS0,115200 root=31:2
<4>PID hash table entries: 64 (order: 6, 256 bytes)
<4>Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)
<4>Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
<6>Memory:1 banks
<4>      16MB = 16MB total
<5>Memory: 14772KB available (1168K code, 244K data, 44K init)
<6>Calibrating delay loop... <5>39.83 BogoMIPS
<4>Mount-cache hash table entries: 512
<5>SCSI subsystem initialized
<6>usbcore: registered new interface driver usbfs
<6>usbcore: registered new interface driver hub
<6>usbcore: registered new device driver usb
<4>NetWinder Floating Point Emulator V0.97 (double precision)
<6>NTFS driver 2.1.28 [Flags: R/W].
<6>io scheduler noop registered (default)
<6>Serial: W90N740 driver $Revision: 1.00 $
<3>scsi_debug_init: out of memory, 1
<4>uclinux[mtd]: RAM probe address=0x7f000000 size=0x200000
<5>Creating 5 MTD partitions on "cramfs":
<5>0x00000000-0x00010000 : "uBoot"
<5>0x00010000-0x00100000 : "Kernel"
<5>0x00100000-0x001e0000 : "Cramfs"
<5>0x001e0000-0x001f0000 : "ParamA"
<5>0x001f0000-0x00200000 : "ParamB"
<4>uclinux[mtd]: set Cramfs to be root filesystem
<7>ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
<7>ohci_hcd: block sizes: ed 64 td 64
<4>w90n740_usb_set_power(0013b4f8, 1, 1)
<4>w90n740_usb_set_power(0013b4f8, 2, 1)
<4>w90n740 start USB host controller.
<6>w90n740-ohci w90n740-ohci: W90N74X OHCI
<7>drivers/usb/core/inode.c: creating file 'devices'
<7>drivers/usb/core/inode.c: creating file '001'
<6>w90n740-ohci w90n740-ohci: new USB bus registered, assigned bus number 1
<6>w90n740-ohci w90n740-ohci: irq 9, io mem 0xfff05000
<7>w90n740-ohci w90n740-ohci: created debug files
<7>w90n740-ohci w90n740-ohci: enabling initreset quirk
<7>w90n740-ohci w90n740-ohci: OHCI controller state
<7>w90n740-ohci w90n740-ohci: OHCI 1.0, NO legacy support registers
<7>w90n740-ohci w90n740-ohci: control 0x083 HCFS=operational CBSR=3
<7>w90n740-ohci w90n740-ohci: cmdstatus 0x00000 SOC=0
<7>w90n740-ohci w90n740-ohci: intrstatus 0x00000004 SF
<7>w90n740-ohci w90n740-ohci: intrenable 0x8000004a MIE RHSC RD WDH
<7>w90n740-ohci w90n740-ohci: hcca frame #0004
<7>w90n740-ohci w90n740-ohci: roothub.a 01000002 POTPGT=1 NDP=2(2)
<7>w90n740-ohci w90n740-ohci: roothub.b 00000000 PPCM=0000 DR=0000
<7>w90n740-ohci w90n740-ohci: roothub.status 00008000 DRWE
<7>w90n740-ohci w90n740-ohci: roothub.portstatus [0] 0x00000100 PPS
<7>w90n740-ohci w90n740-ohci: roothub.portstatus [1] 0x00000100 PPS
<7>usb usb1: default language 0x0409
<7>usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1
<6>usb usb1: Product: W90N74X OHCI
<6>usb usb1: Manufacturer: Linux 2.6.22-uc0 ohci_hcd
<6>usb usb1: SerialNumber: W90N74x
<7>usb usb1: uevent
<7>usb usb1: usb_probe_device
<6>usb usb1: configuration #1 chosen from 1 choice
<7>usb usb1: adding 1-0:1.0 (config #1, interface 0)
<7>usb 1-0:1.0: uevent
<7>usb 1-0:1.0: uevent
<7>hub 1-0:1.0: usb_probe_interface
<7>hub 1-0:1.0: usb_probe_interface - got id
<6>hub 1-0:1.0: USB hub found
<6>hub 1-0:1.0: 2 ports detected
<7>hub 1-0:1.0: standalone hub
<7>hub 1-0:1.0: ganged power switching
<7>hub 1-0:1.0: global over-current protection
<7>hub 1-0:1.0: power on to power good time: 2ms
<7>hub 1-0:1.0: local power source is good
<7>hub 1-0:1.0: no over-current condition exists
<7>hub 1-0:1.0: enabling power on all ports
<7>hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000
<7>drivers/usb/core/inode.c: creating file '001'
<6>Initializing USB Mass Storage driver...
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000100 PPS
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [1] = 0x00000100 PPS
<6>usbcore: registered new interface driver usb-storage
<6>USB Mass Storage support registered.
<4>VFS: Mounted root (cramfs filesystem) readonly.
<6>Freeing init memory: 44K
<7>opening ttyS0...uart_open(0) called
<4>Open an initial console succeed.
<5>Clock: old time 1970/01/01 - 00:00:01 GMT
<5>Clock: new time 2007/06/01 - 10:37:47 GMT

The card reader is plugged into the USB port at this time and the kernel prints the following messages: 

<7>w90n740-ohci w90n740-ohci: rhsc
<7>hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0002
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00010101 CSC PPS CCS
<7>hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000101 PPS CCS
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000101 PPS CCS
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000101 PPS CCS
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000101 PPS CCS
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000101 PPS CCS
<7>hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
usb 1-1: new full speed USB device using w90n740-ohci and address 2
<6>usb 1-1: new full sp€ed USB device using w90n740-ohci and address 2
<7>drivers/usb/host/ohci-dbg.c: SUB 00315a40 dev=0 ep=0in-ctrl flags=0 len=0/64 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315a40 dev=0 ep=0in-ctrl flags=0 len=18/64 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 00 01 00 00 40 00
<7>drivers/usb/host/ohci-dbg.c: data(18/64): 12 01 00 02 00 00 00 40 8f 05 66 63 00 01 01 02... stat:0
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
<7>drivers/usb/host/ohci-dbg.c: SUB 003159f8 dev=0 ep=0out-ctrl flags=0 len=0/0 stat=-115
<7>drivers/usb/host/ohci-dbg.c: setup(8): 00 05 02 00 00 00 00 00
<7>drivers/usb/host/ohci-dbg.c: RET 003159f8 dev=0 ep=0out-ctrl flags=0 len=0/0 stat=0
<7>drivers/usb/host/ohci-dbg.c: SUB 00315a18 dev=2 ep=0in-ctrl flags=0 len=0/18 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315a18 dev=2 ep=0in-ctrl flags=0 len=18/18 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 00 01 00 00 12 00
<7>drivers/usb/housb 1-1: Product: Mass Storage Device
st/ohci-usb 1-1: Manufacturer: Generic
dbg.c: dusb 1-1: SerialNumber: 058F0O1111B1
ata(18/18): 12 01 00 02 00 00 00 40 8f 05 66 63 00 01001 02... stat:0
@7>drivers/usb/host/ohci-dbg.c: Susb 1-1: configuration #1 chosen from 1 choice
UB 00315c48 dev=2 ep=0in-ctrl flags=0 len=0/9 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315c48 dev=2 ep=0in-ctrl scsi0 : SCSI emulation for USB Mass Storage devices
flass=0 len=9/9 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 00 02 00 00 09 00
<7>drivers/usbhhost/ohci-dbg.c: data(9/9): 09 02 20 00 01 01 00 80 32 stat:0
<7>drivers/usb/host/ohci-dbg.c: SUB 00315c70 dev=2 ep=0in-ctrl flags=0 len=0/32 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315c70 dev=2 ep=0in-ctrl flags=0 len=32/32 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 00 02 00 00 20 00
<7>drivers/usb/host/ohci-dbg.c: data(32/32): 09 02 20 00 01 01 00 80 32 09 04 00 00 02 08 06... stat:0
<7>drivers/usb/host/ohci-dbg.c: SUB 00315f00 dev=2 ep=0in-ctrl flags=0 len=0/255 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315f00 dev=2 ep=0in-ctrl flags=0 len=4/255 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 00 03 00 00 ff 00
<7>drivers/usb/host/ohci-dbg.c: data(4/255): 04 03 09 04 stat:0
<7>usb 1-1: default language 0x0409
<7>drivers/usb/host/ohci-dbg.c: SUB 00315f00 dev=2 ep=0in-ctrl flags=0 len=0/255 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315f00 dev=2 ep=0in-ctrl flags=0 len=40/255 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 02 03 09 04 ff 00
<7>drivers/usb/host/ohci-dbg.c: data(40/255): 28 03 4d 00 61 00 73 00 73 00 20 00 53 00 74 00... stat:0
<7>drivers/usb/host/ohci-dbg.c: SUB 00315f20 dev=2 ep=0in-ctrl flags=0 len=0/255 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315f20 dev=2 ep=0in-ctrl flags=0 len=16/255 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 01 03 09 04 ff 00
<7>drivers/usb/host/ohci-dbg.c: data(16/255): 10 03 47 00 65 00 6e 00 65 00 72 00 69 00 63 00 stat:0
<7>drivers/usb/host/ohci-dbg.c: SUB 00315f30 dev=2 ep=0in-ctrl flags=0 len=0/255 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00315f30 dev=2 ep=0in-ctrl flags=0 len=26/255 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): 80 06 03 03 09 04 ff 00
<7>drivers/usb/host/ohci-dbg.c: data(26/255): 1a 03 30 00 35 00 38 00 46 00 30 00 4f 00 31 00... stat:0
<7>usb 1-1: new device strings: Mfr=1, Product=2, SerialNumber=3
<6>usb 1-1: Product: Mass Storage Device
<6>usb 1-1: Manufacturer: Generic
<6>usb 1-1: SerialNumber: 058F0O1111B1
<7>usb 1-1: uevent
<7>usb 1-1: usb_probe_device
<6>usb 1-1: configuration #1 chosen from 1 choice
<7>drivers/usb/host/ohci-dbg.c: SUB 002a2f48 dev=2 ep=0out-ctrl flags=0 len=0/0 stat=-115
<7>drivers/usb/host/ohci-dbg.c: setup(8): 00 09 01 00 00 00 00 00
<7>drivers/usb/host/ohci-dbg.c: RET 002a2f48 dev=2 ep=0out-ctrl flags=0 len=0/0 stat=0
<7>usb 1-1: adding 1-1:1.0 (config #1, interface 0)
<7>usb 1-1:1.0: uevent
<7>usb 1-1:1.0: uevent
<7>usb-storage 1-1:1.0: usb_probe_interface
<7>usb-storage 1-1:1.0: usb_probe_interface - got id
<7>usb-storage: USB Mass Storage device detected
<7>usb-storage: -- associate_dev
<7>usb-storage: Vendor: 0x058f, Product: 0x6366, Revision: 0x0100
<7>usb-storage: Interface Subclass: 0x06, Protocol: 0x50
<7>usb-storage: Transport: Bulk
<7>usb-storage: Protocol: Transparent SCSI
<6>scsi0 : SCSI emulation for USB Mass Storage devices
<7>usb-storage: *** thread sleeping.
<7>usb-storage: device found at 2
<7>usb-storage: waiting for device to settle before scanning
<7>drivers/usb/core/inode.c: creating file '002'
<7>hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0002
<7>w90n740-ohci w90n740-ohci: GetStatus roothub.portstatus [0] = 0x00000103 PPS PES CCS
<7>usb-storaee: usb_stor_control_msg: rq=fe rqtype=a1 value=0000 index=00 len=1
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=0in-ctrl flags=c len=0/1 stat=-115
<7>drivers/usb/host/oscsi 0:0:0:0: Direct-Access     Multi    Flash Reader     1.00 PQ: 0 ANSI: 0
hci-dbg.c: RET 00336738 dev22 pp=0in-ctrl flags=c len=1/1 stat=0
<7>drivers/usb/host/ohci-dbg.c: setup(8): a1 fe 00 00 00 00 01000
<7>drivers/usb/host/ohci-dbg.c: data(1/1): 00 stat:0
<7>usb-storage: GetMaxLUN command result is 1, data is 0
<7>usb-storage: queuecommand called
<7>usb-storage: *** thread awakened.
<7>usb-storage: Command INQUIRY (6 bytes)
<7>usb-storage:  12 00 00 00 24 00
<7>usb-storage: Bulk Command S 0x43425355 T 0x1 L 36 F 128 Trg 0 LUN 0 CL 6
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=1out-bulk flags=c len=0/31 stat=-115
<7>drivers/usb/host/ohci-dbg.c: data(0/31): 55 53 42 43 01 00 00 00 24 00 00 00 80 00 06 12... stat:-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=1out-bulk flags=c len=31/31 stat=0
<7>usb-storage: Status code 0; transferred 31/31
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk command transfer result=0
<7>usb-storage: usb_stor_bulk_transfer_sglist: xfer 36 bytes, 1 entries
<7>drivers/usb/host/ohci-dbg.c: SUB 0032f698 dev=2 ep=2in-bulk flags=5 len=0/36 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 0032f698 dev=2 ep=2in-bulk flags=5 len=36/36 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(36/36): 00 80 00 00 1f 00 00 00 4d 75 6c 74 69 20 20 20... stat:0
<7>usb-storage: Status code 0; transferred 36/36
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk data transfer result 0x0
<7>usb-storage: Attempting to get CSW...
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=2in-bulk flags=c len=13/13 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(13/13): 55 53 42 53 01 00 00 00 00 00 00 00 00 stat:0
<7>usb-storage: Status code 0; transferred 13/13
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk status result = 0
<7>usb-storage: Bulk Status S 0x53425355 T 0x1 R 0 Stat 0x0
<7>usb-storage: scsi cmd done, result=0x0
<7>usb-storage: *** thread sleeping.
<5>scsi 0:0:0:0: Direct-Access     Multi    Flash Reader     1.00 PQ: 0 ANSI: 0
<7>usb-storage: queuecommand called
<7>usb-storage: *** thread awakened.
<7>usb-storage: Command TEST_UNIT_READY (6 bytes)
<7>usb-storage:  00 00 00 00 00 00
<7>usb-storage: Bulk Command S 0x43425355 T 0x2 L 0 F 0 Trg 0 LUN 0 CL 6
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=1out-bulk flags=c len=0/31 stat=-115
<7>drivers/usb/host/ohci-dbg.c: data(0/31): 55 53 42 43 02 00 00 00 00 00 00 00 00 00 06 00... stat:-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=1out-bulk flags=c len=31/31 stat=0
<7>usb-storage: Status code 0; transferred 31/31
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk command transfer result=0
<7>usb-storage: Attempting to get CSW...
<7>usb-storage: usb_stor_bulk_transfer_buf: ffer 13 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=2in-bulk flags=c len=13/13 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(13/13): 55 53 42 53 02 00 00 00 00 00 0  00 01 stat:0
<7>usb-storage: Status code 0; transferred 13/13
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk status result = 0
<7>usb-storage: Bulk Status S 0x53425355 T 0x2 R 0 Stat 0x1
<7>usb-storage: -- transport indicates command failure
<7>usb-storage: Issuing auto-REQUEST_SENSE
<7>usb-storage: Bulk Command S 0x43425355 T 0x3 L 18 F 128 Trg 0 LUN 0 CL 6
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=1out-bulk flags=c len=0/31 stat=-115
<7>drivers/usb/host/ohci-dbg.c: data(0/31): 55 53 42 43 03 00 00 00 12 00 00 00 80 00 06 03... stat:-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=1out-bulk flags=c len=31/31 stat=0
<7>usb-storage: Status code 0; transferred 31/31
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk command transfer result=0
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 18 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=8 len=0/18 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=2in-bulk flags=8 len=18/18 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(18/18): f0 02 06 00 00 00 00 0a 00 aa 55 42 28 00 02 00... stat:0
<7>usb-storage: Status code 0; transferred 18/18
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk data transfer result 0x0
<7>usb-storage: Attempting to get CSW...
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=2in-bulk flags=c len=13/13 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(13/13): 55 53 42 53 03 00 00 00 00 00 00 00 00 stat:0
<7>usb-storage: Status code 0; transferred 13/13
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk status result = 0
<7>usb-storage: Bulk Status S 0x53425355 T 0x3 R 0 Stat 0x0
<7>usb-storage: -- Result from auto-sense is 0
<7>usb-storage: -- code: 0xf0, key: 0x6, ASC: 0x28, ASCQ: 0x0
<7>usb-storage: Unit Attention: Not ready to ready change, medium may have changed
<7>usb-storage: scsi cmd done, result=0x2
<7>usb-storage: *** thread sleeping.
<7>usb-storage: queuecommand called
<7>usb-storage: *** thread awakened.
<7>usb-storage: Command TEST_UNIT_READY (6 bytes)
<7>usb-storage:  00 00 00 00 00 00
<7>usb-storage: Bulk Command S 0x43425355 T 0x4 L 0 F 0 Trg 0 LUN 0 CL 6
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=1out-bulk flags=c len=0/31 stat=-115
<7>drivers/usb/host/ohci-dbg.c: data(0/31): 55 53 42 43 04 00 00 00 00 00 00 00 00 00 06 00... stat:-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=1out-bulk flags=c len=31/31 stat=0
<7>usb-storage: Status code 0; transferred 31/31
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk command transfer result=0
<7>usb-storage: Attempting to get CSW...
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=2in-bulk flags=c len=13/13 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(13/13): 55 53 42 53 04 00 00 00 00 00 00 00 00 stat:0
<7>usb-storage: Status code 0; transferred 13/13
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk status result = 0
<7>usb-storage: Bulk Status S 0x53425355 T 0x4 R 0 Stat 0x0
<7>usb-storage: scsi cmd done, result=0x0
<7>usb-storage: *** thread sleeping.
<7>usb-storage: queuecommand called
<7>usb-storage: *** thread awakened.
<7>usb-storage: Command READ_CAPACITY (10 bytes)
<7>usb-storage:  25 00 00 00 00 00 00 00 00 00
<7>usb-storage: Bulk Command S 0x43425355 T 0x5 L 8 F 128 Trg 0 LUN 0 CL 10
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=1out-bulk flags=c len=0/31 stat=-115
<7>drivers/usb/host/ohci-dbg.c: data(0/31): 55 53 42 43 05 00 00 00 08 00 00 00 80 00 0a 25... stat:-115
<7>drivers/usb/host/ohci-dbg.c: RET 00336738 dev=2 ep=1out-bulk flags=c len=31/31 stat=0
<7>usb-storage: Status code 0; transferred 31/31
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk command transfer result=0
<7>usb-storage: usb_stor_bulk_transfer_sglist: xfer 8 bytes, 1 entries
<7>drivers/usb/host/ohci-dbg.c: SUB 0032cdb8 dev=2 ep=2in-bulk flags=5 len=0/8 stat=-115
<7>drivers/usb/host/ohci-dbg.c: RET 0032cdb8 dev=2 ep=2in-bulk flags=5 len=8/8 stat=0
<7>drivers/usb/host/ohci-dbg.c: data(8/8): 00 01 f5 ff 00 00 02 00 stat:0
<7>usb-storage: Status code 0; transferred 8/8
<7>usb-storage: -- transfer complete
<7>usb-storage: Bulk data transfer result 0x0
<7>usb-storage: Attempting to get CSW...
<7>usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
<7>drivers/usb/host/ohci-dbg.c: SUB 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-115

$ <7>usb-storage: command_abort called
<7>usb-storage: usb_stor_stop_transport called
<7>usb-storage: -- cancelling URB
<7>drivers/usb/host/ohci-dbg.c: UNLINK 00336738 dev=2 ep=2in-bulk flags=c len=0/13 stat=-104

There is nothing in /proc/bus/usb!

What should I do?

Darwin Chen.
-----------------------------------------------------------
/*
 * linux/drivers/usb/host/ohci-w90n740.c
 * OHCI HCD (Host Controller Driver) for Winbond w90n740.
 *
 * (C) Copyright 2006-2008 Chen Weiwen <[email protected]>
 *
 * USB Bus Glue for Winbond W90N740
 *
 * Written by Chen Weiwen <[email protected]>
 * Based on fragments of Samsung S3c24xx Christopher Hoover <[email protected]>.
 *
 * Modified for W90N740 from ohci-s3c2410.c
 *	by Chen Weiwen, <[email protected]>
 *	Copyright (C) 2006-2008 Chen Weiwen
 *
 * This file is licenced under the GPL.
*/

#include <linux/platform_device.h>

#include <asm/hardware.h>
#include <asm/arch/usb-control.h>

#define valid_port(idx)		((idx) == 1 || (idx) == 2)
#define HCRootHubStatus 	0xFFF05050

void enable_usb_clock()
{
	unsigned long nClockSel;
	nClockSel = CSR_READ(CLKSEL);
	nClockSel |= 0x00000080;
	CSR_WRITE(CLKSEL, nClockSel);
}
void disable_usb_clock()
{
	unsigned long nClockSel;
	nClockSel = CSR_READ(CLKSEL);
	nClockSel &= 0xFFFFFF7F;
	CSR_WRITE(CLKSEL, nClockSel);
}

static void w90n740_usb_power_control(int port, int to) {
	int ps = CSR_READ(HCRootHubStatus);
	if(to)
		CSR_WRITE(HCRootHubStatus, ps|0x10000);
	else
		CSR_WRITE(HCRootHubStatus, ps|0x01);
}

static void w90n740_usb_enable_oc(struct w90n740_hcd_info * info, int on) { }

static struct w90n740_hcd_info *to_w90n740_info(struct usb_hcd *hcd) {
	return hcd->self.controller->platform_data;
}

static void w90n740_start_hc(struct platform_device *dev, struct usb_hcd *hcd) {
	struct w90n740_hcd_info *info = dev->dev.platform_data;
	printk("w90n740 start USB host controller.\n");
	
	enable_usb_clock();
	mdelay(2);			//let the bus clock stabilise 
}

static void w90n740_stop_hc(struct platform_device *dev) {
	struct w90n740_hcd_info *info = dev->dev.platform_data;

	if (info != NULL) {
		info->report_oc = NULL;
		info->hcd	= NULL;

		if (info->enable_oc != NULL) {
			(info->enable_oc)(info, 0);
		}
	}

	disable_usb_clock();
}

/* w90n740_usb_set_power
 *
 * configure the power on a port, by calling the platform device
 * routine registered with the platform device */

static void w90n740_usb_set_power(struct w90n740_hcd_info *info,
				  int port, int to)
{
	int ps = CSR_READ(0xfff05048);

	if (info == NULL)
		return;

	printk(KERN_DEBUG "w90n740_usb_set_power(%08x, %d, %d)\n", info, port, to);

	CSR_WRITE(0xfff05048,ps|0x200);
	ps = CSR_READ(HCRootHubStatus);
	if(to)
		CSR_WRITE(HCRootHubStatus, ps|0x10000);
	else
		CSR_WRITE(HCRootHubStatus, ps|0x01);
}

/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

/*
 * usb_hcd_w90n740_remove - shutdown processing for HCD
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_3c2410_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 */
static void
usb_hcd_w90n740_remove (struct usb_hcd *hcd, struct platform_device *dev) {
	usb_remove_hcd(hcd);
	w90n740_stop_hc(dev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

/**
 * usb_hcd_w90n740_probe - initialize W90N740-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 *
 */
static int usb_hcd_w90n740_probe (const struct hc_driver *driver,
				  struct platform_device *dev)
{

	struct usb_hcd *hcd = NULL;
	int retval;
	struct w90n740_hcd_info * info = (struct w90n740_hcd_info *)dev->dev.platform_data;
		
	w90n740_usb_set_power(dev->dev.platform_data, 1, 1);
	w90n740_usb_set_power(dev->dev.platform_data, 2, 1);

	hcd = usb_create_hcd(driver, &dev->dev, "W90N74x");
	if (hcd == NULL)
		return -ENOMEM;

	hcd->rsrc_start = dev->resource[0].start;
	hcd->rsrc_len   = dev->resource[0].end - dev->resource[0].start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		dev_err(&dev->dev, "request_mem_region failed");
		retval = -EBUSY;
		goto err_put;
	}

	w90n740_start_hc(dev, hcd);
	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&dev->dev, "ioremap failed\n");
		retval = -ENOMEM;
		goto err_ioremap;
	}

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd,INT_USBINT0 , IRQF_DISABLED);
	if (retval != 0)
		goto err_ioremap;

	return 0;

 err_ioremap:
	w90n740_stop_hc(dev);
	iounmap(hcd->regs);

 err_mem:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

 err_put:
	usb_put_hcd(hcd);
	return retval;
}

static int ohci_w90n740_start (struct usb_hcd *hcd) {
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int ret;

	if ((ret = ohci_init(ohci)) < 0)
		return ret;
	if ((ret = ohci_run (ohci)) < 0) {
		err ("can't start %s", hcd->self.bus_name);
		ohci_stop (hcd);
		return ret;
	}

	return 0;
}


static const struct hc_driver ohci_w90n740_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"W90N74X OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_w90n740_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
	.hub_irq_enable =	ohci_rhsc_enable,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

/* device driver */

static int ohci_hcd_w90n740_drv_probe(struct platform_device *pdev) {
	return usb_hcd_w90n740_probe(&ohci_w90n740_hc_driver, pdev); }

static int ohci_hcd_w90n740_drv_remove(struct platform_device *pdev) {
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	usb_hcd_w90n740_remove(hcd, pdev);
	return 0;
}

static struct platform_driver ohci_hcd_w90n740_driver = {
	.probe		= ohci_hcd_w90n740_drv_probe,
	.remove		= ohci_hcd_w90n740_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "w90n740-ohci",
	},
};




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