From 4c04428c2c8dab95ac054b22dae4354a0df1c1ec Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Mon, 18 Sep 2017 06:40:41 -0700 Subject: usb: xhci: Add interrupt transfer support xHCI uses normal TRBs for both bulk and interrupt. This adds the missing interrupt transfer support to xHCI so that devices like USB keyboard that uses interrupt transfer can work. Signed-off-by: Bin Meng Reviewed-by: Stefan Roese Tested-by: Stefan Roese --- drivers/usb/host/xhci.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 04eb1eb14d..4b3d58d56e 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -890,11 +890,18 @@ unknown: static int _xhci_submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, int length, int interval) { + if (usb_pipetype(pipe) != PIPE_INTERRUPT) { + printf("non-interrupt pipe (type=%lu)", usb_pipetype(pipe)); + return -EINVAL; + } + /* - * TODO: Not addressing any interrupt type transfer requests - * Add support for it later. + * xHCI uses normal TRBs for both bulk and interrupt. When the + * interrupt endpoint is to be serviced, the xHC will consume + * (at most) one TD. A TD (comprised of sg list entries) can + * take several service intervals to transmit. */ - return -EINVAL; + return xhci_bulk_tx(udev, pipe, length, buffer); } /** -- cgit v1.2.3