This patch is to set xhci root hub's DeviceRemovable according to usb port's
connect type which currently comes from ACPI information rather than xhci PORTSC
register due to Windows prefers to ACPI information. If ACPI information was
different with PORTSC, there would be a warning.
Signed-off-by: Lan Tianyu <tianyu....@intel.com>
---
drivers/usb/host/xhci-hub.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a686cf4..36c07aa 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -93,15 +93,25 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd,
struct xhci_hcd *xhci,
*/
memset(port_removable, 0, sizeof(port_removable));
for (i = 0; i < ports; i++) {
+ struct usb_device *hdev = hcd->self.root_hub;
+ enum usb_port_connect_type connect_type
+ = usb_get_hub_port_connect_type(hdev, i + 1);
+
portsc = xhci_readl(xhci, xhci->usb2_ports[i]);
+
/* If a device is removable, PORTSC reports a 0, same as in the
* hub descriptor DeviceRemovable bits.
*/
- if (portsc & PORT_DEV_REMOVE)
+ if (connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
+ if (!(portsc & PORT_DEV_REMOVE))
+ xhci_warn(xhci, "usb2.0 port%d's connect type
from ACPI is different with PORTSC register. ACPI returns hard-wired.\n",
+ i + 1);
+
/* This math is hairy because bit 0 of DeviceRemovable
* is reserved, and bit 1 is for port 1, etc.
*/
port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8);
+ }
}
/* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN
@@ -147,9 +157,19 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd,
struct xhci_hcd *xhci,
port_removable = 0;
/* bit 0 is reserved, bit 1 is for port 1, etc. */
for (i = 0; i < ports; i++) {
+ struct usb_device *hdev = hcd->self.root_hub;
+ enum usb_port_connect_type connect_type
+ = usb_get_hub_port_connect_type(hdev, i + 1);
+
portsc = xhci_readl(xhci, xhci->usb3_ports[i]);
- if (portsc & PORT_DEV_REMOVE)
+
+ if (connect_type == USB_PORT_CONNECT_TYPE_HARD_WIRED) {
+ if (!(portsc & PORT_DEV_REMOVE))
+ xhci_warn(xhci, "usb3.0 port%d's connect type
from ACPI is different with PORTSC register. ACPI returns hard-wired.\n",
+ i + 1);
+
port_removable |= 1 << (i + 1);
+ }
}
desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable);
--
1.7.9.5
--
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