diff options
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index c5313c83f42e..55920b39d106 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -401,15 +401,28 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud /* Step 5 */ ep0_ctx->ep_info2 = EP_TYPE(CTRL_EP); /* - * See section 4.3 bullet 6: - * The default Max Packet size for ep0 is "8 bytes for a USB2 - * LS/FS/HS device or 512 bytes for a USB3 SS device" * XXX: Not sure about wireless USB devices. */ - if (udev->speed == USB_SPEED_SUPER) + switch (udev->speed) { + case USB_SPEED_SUPER: ep0_ctx->ep_info2 |= MAX_PACKET(512); - else + break; + case USB_SPEED_HIGH: + /* USB core guesses at a 64-byte max packet first for FS devices */ + case USB_SPEED_FULL: + ep0_ctx->ep_info2 |= MAX_PACKET(64); + break; + case USB_SPEED_LOW: ep0_ctx->ep_info2 |= MAX_PACKET(8); + break; + case USB_SPEED_VARIABLE: + xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); + return -EINVAL; + break; + default: + /* New speed? */ + BUG(); + } /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */ ep0_ctx->ep_info2 |= MAX_BURST(0); ep0_ctx->ep_info2 |= ERROR_COUNT(3); |