From f07c51164e75ffa25b570e2233713b5a2cfa275a Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sat, 11 Oct 2025 18:54:34 -0400
Subject: kern: xhci: Implement controller hard reset

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/include/io/usb/xhciregs.h | 14 ++++++++++++++
 src/sys/include/io/usb/xhcivar.h  |  4 +++-
 2 files changed, 17 insertions(+), 1 deletion(-)

(limited to 'src/sys/include/io')

diff --git a/src/sys/include/io/usb/xhciregs.h b/src/sys/include/io/usb/xhciregs.h
index f2e572b..f849c54 100644
--- a/src/sys/include/io/usb/xhciregs.h
+++ b/src/sys/include/io/usb/xhciregs.h
@@ -32,6 +32,7 @@
 
 #include <sys/types.h>
 #include <sys/cdefs.h>
+#include <sys/param.h>
 
 /*
  * XHCI capability registers
@@ -69,4 +70,17 @@ struct __packed xhci_opregs {
     volatile uint32_t reserved2;
 };
 
+/*
+ * USB command register bits
+ *
+ * See section 5.4.1 of the xHCI spec
+ */
+#define USBCMD_HCRST BIT(1)
+
+/*
+ * Macros to get various register spaces
+ */
+#define XHCI_OPBASE(CAPBASE) \
+    PTR_OFFSET(CAPBASE, (CAPBASE)->caplength)
+
 #endif  /* !_XHCIREGS_H_ */
diff --git a/src/sys/include/io/usb/xhcivar.h b/src/sys/include/io/usb/xhcivar.h
index 5067063..c0b3a39 100644
--- a/src/sys/include/io/usb/xhcivar.h
+++ b/src/sys/include/io/usb/xhcivar.h
@@ -39,7 +39,9 @@
  * @io: I/O space
  */
 struct xhci_hcd {
-    volatile void *io;
+    struct xhci_capregs *capspace;
 };
 
+#define XHCI_TIMEOUT_MSEC 500
+
 #endif  /* !_USB_XHCIVAR_H_ */
-- 
cgit v1.2.3