diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 74 |
1 files changed, 62 insertions, 12 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index b62037b..3a03324 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1237,6 +1237,26 @@ static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, return num_similar_speed_ports; } +static void handle_device_notification(struct xhci_hcd *xhci, + union xhci_trb *event) +{ + u32 slot_id; + struct usb_device *udev; + + slot_id = TRB_TO_SLOT_ID(event->generic.field[3]); + if (!xhci->devs[slot_id]) { + xhci_warn(xhci, "Device Notification event for " + "unused slot %u\n", slot_id); + return; + } + + xhci_dbg(xhci, "Device Wake Notification event for slot ID %u\n", + slot_id); + udev = xhci->devs[slot_id]->udev; + if (udev && udev->parent) + usb_wakeup_notification(udev->parent, udev->portnum); +} + static void handle_port_status(struct xhci_hcd *xhci, union xhci_trb *event) { @@ -1321,20 +1341,21 @@ static void handle_port_status(struct xhci_hcd *xhci, } if (DEV_SUPERSPEED(temp)) { - xhci_dbg(xhci, "resume SS port %d\n", port_id); + xhci_dbg(xhci, "remote wake SS port %d\n", port_id); + /* Set a flag to say the port signaled remote wakeup, + * so we can tell the difference between the end of + * device and host initiated resume. + */ + bus_state->port_remote_wakeup |= 1 << faked_port_index; + xhci_test_and_clear_bit(xhci, port_array, + faked_port_index, PORT_PLC); xhci_set_link_state(xhci, port_array, faked_port_index, XDEV_U0); - slot_id = xhci_find_slot_id_by_port(hcd, xhci, - faked_port_index + 1); - if (!slot_id) { - xhci_dbg(xhci, "slot_id is zero\n"); - goto cleanup; - } - xhci_ring_device(xhci, slot_id); - xhci_dbg(xhci, "resume SS port %d finished\n", port_id); - /* Clear PORT_PLC */ - xhci_test_and_clear_bit(xhci, port_array, - faked_port_index, PORT_PLC); + /* Need to wait until the next link state change + * indicates the device is actually in U0. + */ + bogus_port_status = true; + goto cleanup; } else { xhci_dbg(xhci, "resume HS port %d\n", port_id); bus_state->resume_done[faked_port_index] = jiffies + @@ -1345,6 +1366,32 @@ static void handle_port_status(struct xhci_hcd *xhci, } } + if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_U0 && + DEV_SUPERSPEED(temp)) { + xhci_dbg(xhci, "resume SS port %d finished\n", port_id); + /* We've just brought the device into U0 through either the + * Resume state after a device remote wakeup, or through the + * U3Exit state after a host-initiated resume. If it's a device + * initiated remote wake, don't pass up the link state change, + * so the roothub behavior is consistent with external + * USB 3.0 hub behavior. + */ + slot_id = xhci_find_slot_id_by_port(hcd, xhci, + faked_port_index + 1); + if (slot_id && xhci->devs[slot_id]) + xhci_ring_device(xhci, slot_id); + if (bus_state->port_remote_wakeup && (1 << faked_port_index)) { + bus_state->port_remote_wakeup &= + ~(1 << faked_port_index); + xhci_test_and_clear_bit(xhci, port_array, + faked_port_index, PORT_PLC); + usb_wakeup_notification(hcd->self.root_hub, + faked_port_index + 1); + bogus_port_status = true; + goto cleanup; + } + } + if (hcd->speed != HCD_USB3) xhci_test_and_clear_bit(xhci, port_array, faked_port_index, PORT_PLC); @@ -2277,6 +2324,9 @@ static int xhci_handle_event(struct xhci_hcd *xhci) else update_ptrs = 0; break; + case TRB_TYPE(TRB_DEV_NOTE): + handle_device_notification(xhci, event); + break; default: if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >= TRB_TYPE(48)) |
