From 6f7902208064d7c8c1f3cd559be36a90866005be Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sat, 11 Oct 2025 20:13:06 -0400
Subject: kern: pci: Initialize PCI bus mastering + MMIO

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/io/usb/hcd/xhci.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/sys/io/usb/hcd/xhci.c')

diff --git a/src/sys/io/usb/hcd/xhci.c b/src/sys/io/usb/hcd/xhci.c
index 0125e96..0582aaa 100644
--- a/src/sys/io/usb/hcd/xhci.c
+++ b/src/sys/io/usb/hcd/xhci.c
@@ -35,6 +35,7 @@
 #include <os/clkdev.h>
 #include <io/usb/xhcivar.h>
 #include <io/usb/xhciregs.h>
+#include <io/pci/cam.h>
 #include <io/pci/bar.h>
 #include <io/pci/pci.h>
 #include <os/module.h>
@@ -162,6 +163,20 @@ xhci_init_hc(struct xhci_hcd *hcd)
     return 0;
 }
 
+static void
+xhci_pci_init(struct pci_device *devp)
+{
+    uint32_t config;
+
+    if (devp == NULL) {
+        return;
+    }
+
+    config = pci_readl(devp, PCIREG_CMDSTATUS);
+    config |= PCI_BUS_MASTERING | PCI_MEM_SPACE;
+    pci_writel(devp, PCIREG_CMDSTATUS, config);
+}
+
 static int
 xhci_init(struct module *modp)
 {
@@ -202,6 +217,7 @@ xhci_attach(struct pci_adv *ap)
         return error;
     }
 
+    xhci_pci_init(&dev);
     hcd.capspace = bs.va_base;
     return xhci_init_hc(&hcd);
 }
-- 
cgit v1.2.3