Thx,Dave,Alan for helping me this periods. Now,my dm320_udc can finish get_descriptor and set_address. I can say i finish the first step.
But today,i met another problem: At the gadget side,I just finished SETUP 80.06 v0305 i0409 l00ff(Descriptor type is STRING,the Index is 5 the language is 0x0409,the length is 0xff) and i get the confirmation from the host side.then,i can an oops errors: Unable to handle kernel NULL pointer dereference at virtual address 00000004 pgd = c0004000 [00000004] *pgd=00000000 Internal error: Oops: 17 [#1] Modules linked in: fsg udc CPU: 0 pc : [<bf0021b0>] lr : [<bf002b9c>] Not tainted sp : c024dea8 ip : c024dec8 fp : c024dec4 r10: c0283af8 r9 : c024c000 r8 : c024df54 r7 : 00000000 r6 : 00000000 r5 : 40000013 r4 : c0897988 r3 : c08979a0 r2 : c08979a0 r1 : c024c000 r0 : c0897988 Flags: nZCv IRQs off FIQs on Mode SVC_32 Segment kernel Control: 5317F Table: 01330000 DAC: 00000017 Process swapper (pid: 0, stack limit = 0xc024c194) Stack: (0xc024dea8 to 0xc024e000) dea0: c0897800 40000013 00000000 0000000f c024dedc c024dec8 dec0: bf002b9c bf00219c c07747a0 00000000 c024df00 c024dee0 c002101c bf002aa4 dee0: c0283e04 0000000f c07747a0 c024df54 c024df54 c024df20 c024df04 c0021194 df00: c0020fc4 0000000f c0283e04 c02a7dc4 00000002 c024df50 c024df24 c0021328 df20: c00210ec 00989641 c024df54 ffffffff c024df88 c02a7dc4 00000002 00000001 df40: 0091bd78 c024dfa8 c024df54 c001fed8 c00212e4 00000000 0005317f 0005217f df60: 60000013 c024c000 c0021d94 c02a7dc4 c02be108 0091bda8 41069263 0091bd78 df80: c024dfa8 c024dfac c024df9c c0021dd0 c0021ddc 60000013 ffffffff c024dfc0 dfa0: c024dfac c0021e34 c0021da4 00053175 c028365c c024dfd0 c024dfc4 c001f030 dfc0: c0021df4 c024dff4 c024dfd4 c0008978 c001f010 c0008464 c0284548 00053175 dfe0: c02844dc c024fa84 00000000 c024dff8 00908094 c0008808 00000000 00000000 Backtrace: Function entered at [<bf00218c>] from [<bf002b9c>] r7 = 0000000F r6 = 00000000 r5 = 40000013 r4 = C0897800 Function entered at [<bf002a94>] from [<c002101c>] r5 = 00000000 r4 = C07747A0 Function entered at [<c0020fb4>] from [<c0021194>] r8 = C024DF54 r7 = C024DF54 r6 = C07747A0 r5 = 0000000F r4 = C0283E04 Function entered at [<c00210dc>] from [<c0021328>] r7 = 00000002 r6 = C02A7DC4 r5 = C0283E04 r4 = 0000000F Function entered at [<c00212d4>] from [<c001fed8>] Function entered at [<c0021d94>] from [<c0021e34>] Function entered at [<c0021de4>] from [<c001f030>] r5 = C028365C r4 = 00053175 Function entered at [<c001f000>] from [<c0008978>] Function entered at [<c00087f8>] from [<00908094>] Code: e2803018 e5902018 e1520003 12427028 (e5973004) <0>Kernel panic - not syncing: Aiee, killing interrupt handler! I look up at my System.map,and find the error is at _do_irq,_do_edge_irq. The host debug mesg are:(2.6.11.10,using demsg -c) hub 2-0:1.0: state 5 ports 3 chg 0000 evt 0008 ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [2] = 0x00010100 CSC PPS hub 2-0:1.0: port 3, status 0100, change 0001, 12 Mb/s hub 2-0:1.0: debounce: port 3: total 100ms stable 100ms status 0x100 hub 1-0:1.0: state 5 ports 8 chg 0000 evt ff80 ehci_hcd 0000:00:03.3: GetStatus port 7 status 001002 POWER sig=se0 CSC hub 1-0:1.0: port 7, status 0100, change 0001, 12 Mb/s hub 1-0:1.0: debounce: port 7: total 100ms stable 100ms status 0x100 ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC hub 1-0:1.0: port 8, status 0000, change 0001, 12 Mb/s ....... ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC hub 1-0:1.0: debounce: port 8: total 1500ms stable 0ms status 0x0 hub 1-0:1.0: connect-debounce failed, port 8 disabled hub 1-0:1.0: state 5 ports 8 chg 0000 evt ff80 ehci_hcd 0000:00:03.3: GetStatus port 7 status 001803 POWER sig=j CSC CONNECT hub 1-0:1.0: port 7, status 0501, change 0001, 480 Mb/s hub 1-0:1.0: debounce: port 7: total 100ms stable 100ms status 0x501 ehci_hcd 0000:00:03.3: port 7 full speed --> companion ehci_hcd 0000:00:03.3: GetStatus port 7 status 003801 POWER OWNER sig=j CONNECT ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC hub 1-0:1.0: port 8, status 0000, change 0001, 12 Mb/s ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC ehci_hcd 0000:00:03.3: GetStatus port 8 status 003002 POWER OWNER sig=se0 CSC hub 1-0:1.0: debounce: port 8: total 1500ms stable 0ms status 0x0 hub 1-0:1.0: connect-debounce failed, port 8 disabled hub 2-0:1.0: state 5 ports 3 chg 0000 evt 0008 ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [2] = 0x00010101 CSC PPS CCS hub 2-0:1.0: port 3, status 0101, change 0001, 12 Mb/s hub 2-0:1.0: debounce: port 3: total 100ms stable 100ms status 0x101 ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [2] = 0x00100103 PRSC PPS PES CCS usb 2-3: new full speed USB device using ohci_hcd and address 109 ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [2] = 0x00100103 PRSC PPS PES CCS usb 2-3: not running at top speed; connect to a high speed hub usb 2-3: new device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-3: default language 0x0409 usb 2-3: Product: File-backed Storage Gadget usb 2-3: SerialNumber: 3230204F6374 usb 2-3: hotplug usb 2-3: adding 2-3:1.0 (config #1, interface 0) usb 2-3:1.0: hotplug usbserial_generic 2-3:1.0: usb_probe_interface usbserial_generic 2-3:1.0: usb_probe_interface - got id usb-storage 2-3:1.0: usb_probe_interface usb-storage 2-3:1.0: usb_probe_interface - got id usb-storage: USB Mass Storage device detected usb-storage: -- associate_dev usb-storage: Vendor: 0x0451, Product: 0x9002, Revision: 0x0000 usb-storage: Interface Subclass: 0x06, Protocol: 0x50 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 usb-storage: Vendor: Unknown, Product: Unknown usb-storage: Transport: Bulk usb-storage: Protocol: Transparent SCSI usb-storage: usb_stor_control_msg: rq=fe rqtype=a1 value=0000 index=00 len=1 ohci_hcd 0000:00:03.0: urb dc80cd80 path 3 ep0in 82d60000 cc 8 --> status -75 usb-storage: GetMaxLUN command result is -75, data is 106 usb-storage: *** thread sleeping. scsi12 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 109 usb-storage: waiting for device to settle before scanning usb-storage: queuecommand called usb-storage: *** thread awakened. usb-storage: Command INQUIRY (6 bytes) usb-storage: 12 00 00 00 24 00 usb-storage: Bulk Command S 0x43425355 T 0x6b L 36 F 128 Trg 0 LUN 0 CL 6 usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes usb-storage: Status code 0; transferred 31/31 usb-storage: -- transfer complete usb-storage: Bulk command transfer result=0 usb-storage: usb_stor_bulk_transfer_buf: xfer 36 bytes usb-storage: command_abort called usb-storage: usb_stor_stop_transport called usb-storage: -- cancelling URB usb-storage: Status code -104; transferred 0/36 usb-storage: -- transfer cancelled usb-storage: Bulk data transfer result 0x4 usb-storage: -- command was aborted usb-storage: usb_stor_Bulk_reset called usb-storage: usb_stor_control_msg: rq=ff rqtype=21 value=0000 index=00 len=0 Can u tell me what happened? ------------------------------------------------------- Using Tomcat but need to do more? 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