1 files changed, 114 insertions, 0 deletions
diff --git a/sys/dev/siba/siba_sdram.c b/sys/dev/siba/siba_sdram.c
new file mode 100644
index 0000000..8e74e53
--- /dev/null
+++ b/sys/dev/siba/siba_sdram.c
@@ -0,0 +1,114 @@
+/*-
+ * Copyright (c) 2007 Bruce M. Simpson.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+/*
+ * Child driver for SDRAM/DDR controller core.
+ * Generally the OS should not need to access this device unless the
+ * firmware has not configured the SDRAM controller.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+
+#include <dev/siba/sibavar.h>
+#include <dev/siba/sibareg.h>
+#include <dev/siba/siba_ids.h>
+
+static int	siba_sdram_attach(device_t);
+static int	siba_sdram_probe(device_t);
+
+static int
+siba_sdram_probe(device_t dev)
+{
+
+	if (siba_get_vendor(dev) == SIBA_VID_BROADCOM &&
+	    siba_get_device(dev) == SIBA_DEVID_SDRAMDDR) {
+		device_set_desc(dev, "SDRAM/DDR core");
+		return (BUS_PROBE_DEFAULT);
+	}
+
+	return (ENXIO);
+}
+
+struct siba_sdram_softc {
+	void *notused;
+};
+
+static int
+siba_sdram_attach(device_t dev)
+{
+	//struct siba_sdram_softc *sc = device_get_softc(dev);
+	struct resource *mem;
+	int rid;
+
+	/*
+	 * Allocate the resources which the parent bus has already
+	 * determined for us.
+	 * TODO: interrupt routing
+	 */
+#define MIPS_MEM_RID 0x20
+	rid = MIPS_MEM_RID;
+	mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+	    RF_ACTIVE);
+	if (mem == NULL) {
+		device_printf(dev, "unable to allocate memory\n");
+		return (ENXIO);
+	}
+
+#if 0
+	device_printf(dev, "start %08lx size %04lx\n",
+	    rman_get_start(mem), rman_get_size(mem));
+#endif
+
+	return (0);
+}
+
+static device_method_t siba_sdram_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_attach,	siba_sdram_attach),
+	DEVMETHOD(device_probe,		siba_sdram_probe),
+
+	{0, 0},
+};
+
+static driver_t siba_sdram_driver = {
+	"siba_sdram",
+	siba_sdram_methods,
+	sizeof(struct siba_softc),
+};
+static devclass_t siba_sdram_devclass;
+
+DRIVER_MODULE(siba_sdram, siba, siba_sdram_driver, siba_sdram_devclass, 0, 0);