Hi,
I can not get the USB host mode working in my iMX233 Evaluation Kit (Revision B) no matter what... What could be done?
When I try to load EHCI_HCD USB 2.0 support:
root@freescale ~$ modprobe ehci_hcd ... I get this error: > ehci_hcd: disagrees about version of symbol usb_hcd_resume_root_hub > ehci_hcd: Unknown symbol usb_hcd_resume_root_hub > ehci_hcd: disagrees about version of symbol usb_hcd_unlink_urb_from_ep > ehci_hcd: Unknown symbol usb_hcd_unlink_urb_from_ep > ehci_hcd: disagrees about version of symbol usb_hcd_check_unlink_urb > ehci_hcd: Unknown symbol usb_hcd_check_unlink_urb > ehci_hcd: disagrees about version of symbol usb_hcd_link_urb_to_ep > ehci_hcd: Unknown symbol usb_hcd_link_urb_to_ep > ehci_hcd: disagrees about version of symbol usb_put_hcd > ehci_hcd: Unknown symbol usb_put_hcd > ehci_hcd: disagrees about version of symbol usb_hub_clear_tt_buffer > ehci_hcd: Unknown symbol usb_hub_clear_tt_buffer > ehci_hcd: disagrees about version of symbol usb_hcd_giveback_urb > ehci_hcd: Unknown symbol usb_hcd_giveback_urb > ehci_hcd: disagrees about version of symbol usb_hcd_poll_rh_status > ehci_hcd: Unknown symbol usb_hcd_poll_rh_status > ehci_hcd: disagrees about version of symbol usb_create_hcd > ehci_hcd: Unknown symbol usb_create_hcd > ehci_hcd: disagrees about version of symbol usb_remove_hcd > ehci_hcd: Unknown symbol usb_remove_hcd > ehci_hcd: disagrees about version of symbol usb_add_hcd > ehci_hcd: Unknown symbol usb_add_hcd > modprobe: failed to load module ehci_hcd > (/lib/modules/2.6.31-626-g602af1c/kerne > l/drivers/usb/host/ehci-hcd.ko): unknown symbol in module, or unknown > parameter My imx233 kernel .config file regarding the USB is like this:
CONFIG_USB_SUPPORT=y > CONFIG_USB_ARCH_HAS_HCD=y > # CONFIG_USB_ARCH_HAS_OHCI is not set > CONFIG_USB_ARCH_HAS_EHCI=y > CONFIG_USB=y > # CONFIG_USB_DEBUG is not set > # CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set > > # USB Host Controller Drivers > # > # CONFIG_USB_C67X00_HCD is not set > CONFIG_USB_EHCI_HCD=m > CONFIG_USB_EHCI_ARC=y > CONFIG_USB_EHCI_ARC_OTG=y > # CONFIG_USB_STATIC_IRAM is not set > # CONFIG_USB_EHCI_FSL_MC13783 is not set > # CONFIG_USB_EHCI_FSL_1301 is not set > # CONFIG_USB_EHCI_FSL_1504 is not set > CONFIG_USB_EHCI_FSL_UTMI=y > CONFIG_USB_EHCI_ROOT_HUB_TT=y > # CONFIG_USB_EHCI_TT_NEWSCHED is not set > # CONFIG_USB_OXU210HP_HCD is not set > # CONFIG_USB_ISP116X_HCD is not set > # CONFIG_USB_ISP1760_HCD is not set > # CONFIG_USB_SL811_HCD is not set > # CONFIG_USB_R8A66597_HCD is not set > # CONFIG_USB_HWA_HCD is not set > # CONFIG_USB_MUSB_HDRC is not set > # CONFIG_USB_GADGET_MUSB_HDRC is not set
I have also tried to re-build the kernel by setting the "Always rebuild the kernel" option in LTIB. It does not solve this problem. In addition I have tried to include EHCI_HCD into kernel in LTIB by setting "*" to that option. However, the board detects no USB devices when I connect them (dmesg | more does not show anything). I am using a u-USB type A plug to USB type A jack adapter cable. In my rev. B EVK, the USB host circuit is not assembled. Due to this I supply external 5V power to the USB OTG connector (the voltage is always on). However the ID pin of the connector floats; imx233 can not see the ID pin status. Does imx233 Linux use the ID in USB host mode? What to do?