diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2017-07-19 21:51:21 +0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2017-07-28 23:34:37 +0200 |
| commit | 78e30987520870e0fc1d6b1cba5b46ce86dfff59 (patch) | |
| tree | 882420ab623b3002cef3e2c585f0613b8abb399c | |
| parent | 196ef8323c53b5d43fd9c244daaca1e2172ca47c (diff) | |
| download | u-boot-78e30987520870e0fc1d6b1cba5b46ce86dfff59.tar.gz | |
usb: xhci: Enable TT to support LS/FS devices behind a HS hub
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.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index c02059ee0a..d5eab3a615 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -783,6 +783,20 @@ 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); |