diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2015-05-10 14:10:13 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-05-14 18:49:30 -0600 |
| commit | 71b945267d3e412efe4540a9ee61886f5e1e1e4a (patch) | |
| tree | bf60b16ecc4f79de94cb0cb1b3f91146d413b690 /drivers | |
| parent | 4588d61a284aa2306d4b83954a650c066f1f569c (diff) | |
usb: Fix handover of full-speed devices from ehci to companion
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 46d01d40e8..ce760d0cd3 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: |