When after a reset the port status connection bit is still set and the enable bit is not then we're dealing with a full-speed device and should hand it over to the companion controller.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/usb/host/ehci-hcd.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 46d01d4..ce760d0 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -897,11 +897,21 @@ static int ehci_submit_root(struct usb_device *dev, unsigned long pipe, */ ret = handshake(status_reg, EHCI_PS_PR, 0, 2 * 1000); - if (!ret) - ctrl->portreset |= 1 << port; - else + if (!ret) { + reg = ehci_readl(status_reg); + if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) + == EHCI_PS_CS && !ehci_is_TDI()) { + debug("port %d full speed --> companion\n", port - 1); + reg &= ~EHCI_PS_CLEAR; + reg |= EHCI_PS_PO; + ehci_writel(status_reg, reg); + } else { + ctrl->portreset |= 1 << port; + } + } else { printf("port(%d) reset error\n", port - 1); + } } break; case USB_PORT_FEAT_TEST: