From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 23 Aug 2012 11:26:25 +0000 (+0200)
Subject: xhci: update register layout
X-Git-Tag: qemu-xen-4.3.0-rc1~572^2~15
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=106b214c4fbba80699b32b63020432cbd1cf95db;p=qemu-xen.git

xhci: update register layout

Change the register layout to be a bit more sparse and also not depend
on the number of ports.  Useful when for making the number of ports
runtime-configurable.
---

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 1920edae7a..92ee62943f 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -36,13 +36,12 @@
 #define FIXME() do { fprintf(stderr, "FIXME %s:%d\n", \
                              __func__, __LINE__); abort(); } while (0)
 
-#define MAXSLOTS 8
-#define MAXINTRS 1
-
 #define USB2_PORTS 4
 #define USB3_PORTS 4
 
 #define MAXPORTS (USB2_PORTS+USB3_PORTS)
+#define MAXSLOTS MAXPORTS
+#define MAXINTRS 1 /* MAXPORTS */
 
 #define TD_QUEUE 24
 
@@ -53,16 +52,22 @@
 #define ER_FULL_HACK
 
 #define LEN_CAP         0x40
-#define OFF_OPER        LEN_CAP
 #define LEN_OPER        (0x400 + 0x10 * MAXPORTS)
-#define OFF_RUNTIME     ((OFF_OPER + LEN_OPER + 0x20) & ~0x1f)
-#define LEN_RUNTIME     (0x20 + MAXINTRS * 0x20)
-#define OFF_DOORBELL    (OFF_RUNTIME + LEN_RUNTIME)
+#define LEN_RUNTIME     ((MAXINTRS + 1) * 0x20)
 #define LEN_DOORBELL    ((MAXSLOTS + 1) * 0x20)
 
+#define OFF_OPER        LEN_CAP
+#define OFF_RUNTIME     0x1000
+#define OFF_DOORBELL    0x2000
 /* must be power of 2 */
-#define LEN_REGS        0x2000
+#define LEN_REGS        0x4000
 
+#if (OFF_OPER + LEN_OPER) > OFF_RUNTIME
+#error Increase OFF_RUNTIME
+#endif
+#if (OFF_RUNTIME + LEN_RUNTIME) > OFF_DOORBELL
+#error Increase OFF_DOORBELL
+#endif
 #if (OFF_DOORBELL + LEN_DOORBELL) > LEN_REGS
 # error Increase LEN_REGS
 #endif