grub xhci support

see:

https://github.com/9elements/grub/commits/xhci-module-upstreaming-squash_v4/

grub only supports xhci on bios/uefi targets, but not coreboot.
some newer machines don't have ps/2 controllers, and boot in a
way where ehci isn't available at startup; the controller can't
be used by ehci code, there must be xhci support.

the code is from Patrick Rudolph working on behalf of 9elements.
the code was also sent here for review:

https://lists.gnu.org/archive/html/grub-devel/2020-12/msg00111.html

however, upstream never merged these patches. libreboot will have
to maintain these from now on. the patches have been rebased for
use with grub 2.12.

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/config/grub/patches/0005-xhci/0002-usb-Add-enum-for-xHCI.patch b/config/grub/patches/0005-xhci/0002-usb-Add-enum-for-xHCI.patch
new file mode 100644
index 00000000..d61da615
--- /dev/null
+++ b/config/grub/patches/0005-xhci/0002-usb-Add-enum-for-xHCI.patch
@@ -0,0 +1,29 @@
+From e111983ca5e2a52bfe2bdc5cd639b06bb2f7902d Mon Sep 17 00:00:00 2001
+From: Patrick Rudolph <patrick.rudolph@9elements.com>
+Date: Sun, 15 Nov 2020 19:47:06 +0100
+Subject: [PATCH 2/8] usb: Add enum for xHCI
+
+Will be used in future patches.
+
+Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
+---
+ include/grub/usb.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/include/grub/usb.h b/include/grub/usb.h
+index 688c11f6d..ea6ee8c2c 100644
+--- a/include/grub/usb.h
++++ b/include/grub/usb.h
+@@ -51,7 +51,8 @@ typedef enum
+     GRUB_USB_SPEED_NONE,
+     GRUB_USB_SPEED_LOW,
+     GRUB_USB_SPEED_FULL,
+-    GRUB_USB_SPEED_HIGH
++    GRUB_USB_SPEED_HIGH,
++    GRUB_USB_SPEED_SUPER
+   } grub_usb_speed_t;
+ 
+ typedef int (*grub_usb_iterate_hook_t) (grub_usb_device_t dev, void *data);
+-- 
+2.39.2
+