Hi Made some progress in the AU1200 USB OHCI/EHCI. Previously, if both were selected we got: ------------------------------------------------------------------------ [4294669.339000] au1xxx-ehci au1xxx-ehci.0: Au1xxx EHCI [4294669.347000] au1xxx-ehci au1xxx-ehci.0: new USB bus registered, assigned bus number 1 [4294669.355000] au1xxx-ehci au1xxx-ehci.0: irq 29, io mem 0x14020200 [4294669.361000] au1xxx-ehci au1xxx-ehci.0: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 [4294669.374000] hub 1-0:1.0: USB hub found [4294669.378000] hub 1-0:1.0: 0 ports detected [4294669.488000] au1xxx-ohci au1xxx-ohci.0: Au1xxx OHCI [4294669.495000] au1xxx-ohci au1xxx-ohci.0: new USB bus registered, assigned bus number 2 [4294669.504000] au1xxx-ohci au1xxx-ohci.0: irq 29, io mem 0x14020100 [4294679.372000] BUG: soft lockup detected on CPU#0! [4294679.372000] Cpu 0 [4294679.372000] $ 0 : 00000000 1000fc01 8f6278bc 8f6278bc [4294679.372000] $ 4 : 00000000 804471d0 00030200 80000000 [4294679.372000] $ 8 : 00000000 802b1df0 00000000 8046e000 [4294679.372000] $12 : 8f63b610 fffffffb ffffffff 0000000a [4294679.372000] $16 : 8f6278c0 8f63bbe4 80470000 8f63b8c4 [4294679.372000] $20 : 00000002 804e0000 0000001d 24000000 [4294679.372000] $24 : 00000018 00000000 [4294679.372000] $28 : 80524000 80525df0 00000000 8013aa48 [4294679.372000] Hi : 000301ff [4294679.372000] Lo : fc85b000 [4294679.372000] epc : 8013aa68 notifier_chain_register+0x48/0xb8 Not tainted [4294679.372000] ra : 8013aa48 notifier_chain_register+0x28/0xb8 [4294679.372000] Status: 1000fc03 KERNEL EXL IE [4294679.372000] Cause : 00808000 [4294679.372000] PrId : 04030201 ------------------------------------------------------------------------ The problem was in the ehci-au1xxx.c in usb_ehci_au1xxx_probe before the call to usb_add_hcd the driver called driver->reset (hcd). Reset points to ehci_init which at the end of function calls: register_reboot_notifier(&ehci->reboot_notifier); After that the usb_ehci_au1xxx_probe calls usb_add_hcd which *AGAIN* calls ehci_init *AND* register_reboot_notifer and thus creating reboot_notifier_list->next pointing to reboot_notifier_list! ------------------------------------------------------------------------ If I remove a call to reset, I get: [4294669.337000] au1xxx-ehci au1xxx-ehci.0: Au1xxx EHCI [4294669.344000] au1xxx-ehci au1xxx-ehci.0: new USB bus registered, assigned bus number 1 [4294669.352000] au1xxx-ehci au1xxx-ehci.0: irq 29, io mem 0x14020200 [4294669.359000] au1xxx-ehci au1xxx-ehci.0: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 [4294669.371000] hub 1-0:1.0: USB hub found [4294669.375000] hub 1-0:1.0: 0 ports detected [4294669.486000] au1xxx-ohci au1xxx-ohci.0: Au1xxx OHCI [4294669.493000] au1xxx-ohci au1xxx-ohci.0: new USB bus registered, assigned bus number 2 [4294669.502000] au1xxx-ohci au1xxx-ohci.0: irq 29, io mem 0x14020100 [4294669.595000] hub 2-0:1.0: USB hub found [4294669.599000] hub 2-0:1.0: 2 ports detected ------------------------------------------------------------------------ But it still does not work right. If I plug in USB 2.0 memory stick, I get: ------------------------------------------------------------------------ /root # [4294699.429000] usb 2-1: new full speed USB device using au1xxx-ohci and address 2 [4294699.438000] au1xxx-ehci au1xxx-ehci.0: fatal error [4294699.438000] au1xxx-ehci au1xxx-ehci.0: HC died; cleaning up [4294699.579000] usb 2-1: not running at top speed; connect to a high speed hub [4294709.001000] Initializing USB Mass Storage driver... [4294709.077000] scsi0 : SCSI emulation for USB Mass Storage devices [4294709.251000] usbcore: registered new driver usb-storage [4294709.257000] USB Mass Storage support registered. [4294714.269000] Vendor: Generic Model: STORAGE DEVICE Rev: 1.04 [4294714.276000] Type: Direct-Access ANSI SCSI revision: 00 [4294714.562000] SCSI device sda: 256000 512-byte hdwr sectors (131 MB) [4294714.577000] sda: Write Protect is on [4294714.581000] sda: assuming drive cache: write through [4294714.619000] SCSI device sda: 256000 512-byte hdwr sectors (131 MB) [4294714.635000] sda: Write Protect is on [4294714.639000] sda: assuming drive cache: write through [4294714.644000] sda: sda1 [4294714.663000] sd 0:0:0:0: Attached scsi removable disk sda [4294714.708000] sd 0:0:0:0: Attached scsi generic sg0 type 0 ------------------------------------------------------------------------ Well, back to work. I just wanted to keep you posted, because I know somebody else is also working on it and I wouldn't like to duplicate the effort. BR, Matej
