So far LS/FS devices directly attached to xHC root port can be
successfully enumerated by xHCI driver, but if they are connected
behind a hub, the enumeration process fails to address the device.
It turns out xHCI driver still misses a part that in the device's
input slot context, all Transaction Translator (TT) related fields
are not programmed. The xHCI spec defines how to enable TT.
Now LS/FS devices like USB keyboard/mouse can be enumerated behind
a high speed hub.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
drivers/usb/host/xhci-mem.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 03874db..bac2cee 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -771,6 +771,20 @@ void xhci_setup_addressable_virt_dev(struct xhci_ctrl
*ctrl,
BUG();
}
+#ifdef CONFIG_DM_USB
+ /* Set up TT fields to support FS/LS devices */
+ if (speed == USB_SPEED_LOW || speed == USB_SPEED_FULL) {
+ dev = dev_get_parent_priv(udev->dev);
+ if (dev->speed == USB_SPEED_HIGH) {
+ hub = dev_get_uclass_priv(udev->dev);
+ if (hub->tt.multi)
+ slot_ctx->dev_info |= cpu_to_le32(DEV_MTT);
+ slot_ctx->tt_info |= cpu_to_le32(TT_PORT(udev->portnr));
+ slot_ctx->tt_info |= cpu_to_le32(TT_SLOT(dev->slot_id));
+ }
+ }
+#endif
+
port_num = hop_portnr;
debug("port_num = %d\n", port_num);
--
2.9.2
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