>Sent: Monday, January 19, 2009 12:10 PM >To: Pandita, Vikram; linux-usb >Subject: RE: HCD_USB2 flag, ehci host controller, no FS/LS support > >The HCSPARAMS N_CC = 0. We do not have a companion controller. Then check your driver: static const struct hc_driver .relinquish_port I think it should be NULL if no relinquishing is intended. > >Thanks, >Julie. > >> -----Original Message----- >> From: Pandita, Vikram [mailto:vikram.pandita@xxxxxx] >> Sent: Monday, January 19, 2009 10:54 AM >> To: Julie Zhu; linux-usb >> Subject: RE: HCD_USB2 flag, ehci host controller, no FS/LS support >> >> >Sent: Monday, January 19, 2009 11:11 AM >> >To: linux-usb >> >Subject: HCD_USB2 flag, ehci host controller, no FS/LS support >> > >> >Hello, >> > >> >We are working with a host controller on a PowerPC embedded board. It >is >> >an EHCI host controller. However, there are no UHCI/OHCI host >> >controllers on the board. Therefore, if a FS/LS device plugs onto the >> >> What does the HCSPARAMS capability register read on your hardware? >> What is the value of N_CC? If this is non-zero, you know where the >problem >> lies. >> >> >> >> >board, Linux will try to hand the port to a companion controller, >which >> >is not there, and this causes the EHCI host controller die (or maybe >the >> >port is marked dead?), and unplug the device causes no "disconnect" >> >report. The host controller also does not respond to further plug in >of >> >a HS device. >> > > > >This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) >confidential information that may be proprietary, privileged or copyrighted under applicable law. If >you are not the intended recipient, do not read, copy, or forward this email message or any >attachments. Delete this email message and any attachments immediately. > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
