1 files changed, 77 insertions, 0 deletions
diff --git a/src/sys/io/usb/ehci.c b/src/sys/io/usb/ehci.c
new file mode 100644
index 0000000..62c1c0e
--- /dev/null
+++ b/src/sys/io/usb/ehci.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/syslog.h>
+#include <io/pci/pci.h>
+#include <io/pci/bar.h>
+#include <os/module.h>
+
+#define pr_trace(fmt, ...) printf("ehci: " fmt, ##__VA_ARGS__)
+#if defined(AHCI_DEBUG)
+#define dtrace(fmt, ...) printf("ehci: " fmt, ##__VA_ARGS__)
+#else
+#define dtrace(...) __nothing
+#endif  /* AHCI_DEBUG */
+
+static struct pci_device dev;
+static struct pci_adv driver;
+
+static int
+ehci_init(struct module *modp)
+{
+    int error;
+
+    if ((error = pci_advoc(&driver)) < 0) {
+        pr_trace("failed to advocate for xhc\n");
+        return error;
+    }
+
+    return 0;
+}
+
+/*
+ * Called when an EHCI host controller is detected
+ * on the machine
+ */
+static int
+ehci_attach(struct pci_adv *adv)
+{
+    dev = adv->lookup;
+    pr_trace("detected EHCI controller\n");
+    return 0;
+}
+
+static struct pci_adv driver = {
+    .lookup = PCI_CS_ID(0x0C, 0x03),
+    .attach = ehci_attach,
+    .classrev = 1,
+};
+
+MODULE_EXPORT("ehci", MODTYPE_PCI, ehci_init);