On Wed, 14 Mar 2007, Lei Sun wrote: > > On Wed, 14 Mar 2007, Lei Sun wrote: > > > >> Thanks for your reply! Appreciate it ! > >> > >> the debugging code in ehci_hub_status_data() shows that the port status > >> always return "0x1000" with or without flah devices plugged in. > > > > That disagrees with what you said earlier: > > > >>>> 3. Read port status register (2 ports total), port#1 return 0, port#2 > >>>> returned 1002, by looking at the code bellow: > > > > You said the port status was 0x1002, not 0x1000. > > status was 0x1002, that was print it out in ehci_irq() funtion last time, > ( i didn't put debugging message in ehci_hub_status_data() by that time). > now ehci_irq() function print out "0x1803" instead, > and 0x1000 is print out in ehci_hub_status_data() function. I even disagree > with what I saw, because it doesn't seems to be consistent. > > We did had some hardware issue, the chip was stressed by higher voltage. > But since i am still able to read/write PCI register, i am assuming it still > function correctly.
Can you post another dmesg log with CONFIG_USB_DEBUG turned on, showing what happens when you plug the device in? > > When the device is plugged in, the port status should have the 0x0001 bit > > set (PORT_CONNECT). You may have to wait a few milliseconds for it to > > debounce. And when you first plug in the device, the 0x0002 bit should > > also be set (PORT_CSC). > > What about the PORT_RESUME bit? is it suppose to be set when device plugged > in ? It is not supposed to be set. > >> i was mistaken by saying "port was powering down" , it is he USB power i > >> was > >> talking about, we have a LED indicating the USB power , it was turned off > >> right after usb was initialized. Is that suppose to be like this? > > > > What do you mean by "USB power"? Do you mean power to the EHCI > > controller? Do you mean VBUS power on the USB port? Do you mean > > something else? > > VBUS power Either VBUS power should always be on (if the controller doesn't do power switching) or it should be on whenever PORT_POWER (0x1000) is enabled. Since that bit was enabled, VBUS power should have been on. 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
