empty stub intel hda module

modules/hda.c

@@ -0,0 +1,51 @@
+/*
+ * Experimental Intel High-Definition Audio "driver"
+ */
+
+#include <module.h>
+#include <printf.h>
+#include <pci.h>
+#include <mod/shell.h>
+
+struct hda_device {
+	uint32_t pci_device;
+};
+
+static struct hda_device _device;
+
+static void find_hda(uint32_t device, uint16_t vendorid, uint16_t deviceid, void * extra) {
+
+	struct hda_device * hda = extra;
+
+	if ((vendorid == 0x8086) && (deviceid == 0x2668)) {
+		hda->pci_device = device;
+	}
+
+}
+
+DEFINE_SHELL_FUNCTION(hda_test, "[debug] Intel HDA experiments") {
+
+	if (!_device.pci_device) {
+		fprintf(tty, "No HDA device found.\n");
+		return 1;
+	}
+	fprintf(tty, "HDA audio device is at 0x%x.\n", _device.pci_device);
+
+	return 0;
+}
+
+static int init(void) {
+	BIND_SHELL_FUNCTION(hda_test);
+	pci_scan(&find_hda, -1, &_device);
+	if (!_device.pci_device) {
+		return 1;
+	}
+	return 0;
+}
+
+static int fini(void) {
+	return 0;
+}
+
+MODULE_DEF(hda, init, fini);
+MODULE_DEPENDS(debugshell);