Here is the log with more debug messages. in ehci_hub_status_data() , both ports status are 0x1000, and VBUS power is still off. for another different flash drive , in ehci_irq() the status read is 0x1002 . Thanks! lei
ehci_hcd: block sizes: qh 128 qtd 96 itd 192 sitd 96 PCI: enabling device 0000:00:0d.2 (0140 -> 0142) PCI: Enabling bus mastering for device 0000:00:0d.2 ehci_hcd 0000:00:0d.2: EHCI Host Controller ehci_hcd 0000:00:0d.2: new USB bus registered, assigned bus number 1 PCI: Enabling Mem-Wr-Inval for device 0000:00:0d.2 ehci_hcd 0000:00:0d.2: irq 28, io mem 0x4b002000 ehci_hcd 0000:00:0d.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb1: Product: EHCI Host Controller usb usb1: Manufacturer: Linux 2.6.17.8 ehci_hcd usb usb1: SerialNumber: 0000:00:0d.2 usb usb1: uevent usb usb1: configuration #1 chosen from 1 choice usb 1-0:1.0: uevent hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected <5>ehci_irq: status=0x00000004 addr=0x4b002024 PCD deteted, i=2 command=10009 status=0 reset_done=0 status=1803 reset_done=0 ohci_hcd: block sizes: ed 64 td 64 PCI: enabling device 0000:00:0d.0 (0140 -> 0142) PCI: Enabling bus mastering for device 0000:00:0d.0 ohci_hcd 0000:00:0d.0: OHCI Host Controller ohci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 2 ohci_hcd 0000:00:0d.0: irq 28, io mem 0x4b000000 ehci_hub_status_data: ports 0: status=0x1000 ehci_hub_status_data: ports 1: status=0x1000 ehci_hub_status_data: ports 0: status=0x1000 ehci_hub_status_data: ports 1: status=0x1000 usb usb2: Product: OHCI Host Controller usb usb2: Manufacturer: Linux 2.6.17.8 ohci_hcd usb usb2: SerialNumber: 0000:00:0d.0 usb usb2: uevent usb usb2: configuration #1 chosen from 1 choice usb 2-0:1.0: uevent hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected ehci_hub_status_data: ports 0: status=0x1000 ehci_hub_status_data: ports 1: status=0x1000 ehci_hub_status_data: ports 0: status=0x1000 ehci_hub_status_data: ports 1: status=0x1000 PCI: enabling device 0000:00:0d.1 (0140 -> 0142) PCI: Enabling bus mastering for device 0000:00:0d.1 ohci_hcd 0000:00:0d.1: OHCI Host Controller ohci_hcd 0000:00:0d.1: new USB bus registered, assigned bus number 3 ohci_hcd 0000:00:0d.1: irq 28, io mem 0x4b001000 ehci_hub_status_data: ports 0: status=0x1000 ehci_hub_status_data: ports 1: status=0x1000 ehci_hub_status_data: ports 0: status=0x1000 ----- Original Message ----- From: "Alan Stern" <[EMAIL PROTECTED]> To: "Lei Sun" <[EMAIL PROTECTED]> Cc: <Linux-usb-users@lists.sourceforge.net> Sent: Wednesday, March 14, 2007 5:17 PM Subject: Re: [Linux-usb-users] problem with EHCI controller > On Wed, 14 Mar 2007, Lei Sun wrote: > >> Here is the usb relaed dmesg, it's a bit long , >> Maybe i need to look into the schematics, see why the VBUS power is lost >> after driver initailzed, the power is on before booting up linux. > > Your log shows port status = 0x1803, which means that VBUS power was on > when you plugged in the flash device. But the log doesn't contain any > messages from ehci_hub_status_data(). That routine should also see the > port status is 0x1803 and it should return 1. > >> <5>ehci_irq: status=0x00000004 >> PCD deteted, i=2 >> command=10009 >> status=0 >> status=1803 > > What happens the next time ehci_hub_status_data() is called after this? > > Alan Stern > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
