Add device node for SDRAMC device. Currently just claims device's

resources.
2026-06-08 16:22:46 -04:00 · 2014-02-28 02:59:51 +00:00 · 2014-02-28 02:59:51 +00:00 · 089fd56d90
commit 089fd56d90
parent 97eb0c3c6a
1 changed files with 105 additions and 0 deletions
--- a/sys/arm/at91/at91_sdramc.c
+++ b/sys/arm/at91/at91_sdramc.c
@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 2014 Warner Losh.  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 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 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.
+ */
+
+#include "opt_platform.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+#include <sys/systm.h>
+#include <sys/rman.h>
+
+#include <machine/bus.h>
+
+#include <arm/at91/at91var.h>
+#include <arm/at91/at91_aicreg.h>
+
+#ifdef FDT
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#endif
+
+struct sdramc_softc {
+	struct resource	*mem_res;	/* Memory resource */
+	device_t	sc_dev;
+};
+
+static int
+at91_sdramc_probe(device_t dev)
+{
+#ifdef FDT
+	if (!ofw_bus_is_compatible(dev, "atmel,at91sam9260-sdramc"))
+		return (ENXIO);
+#endif
+	device_set_desc(dev, "SDRAMC");
+        return (0);
+}
+
+static int
+at91_sdramc_attach(device_t dev)
+{
+	int rid, err = 0;
+	struct sdramc_softc *sc;
+
+	sc = device_get_softc(dev);
+	sc->sc_dev = dev;
+
+	rid = 0;
+	sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+	    RF_ACTIVE);
+
+	if (sc->mem_res == NULL)
+		panic("couldn't allocate register resources");
+
+	return (err);
+}
+
+static device_method_t at91_sdramc_methods[] = {
+	DEVMETHOD(device_probe, at91_sdramc_probe),
+	DEVMETHOD(device_attach, at91_sdramc_attach),
+	DEVMETHOD_END
+};
+
+static driver_t at91_sdramc_driver = {
+	"at91_sdramc",
+	at91_sdramc_methods,
+	sizeof(struct sdramc_softc),
+};
+
+static devclass_t at91_sdramc_devclass;
+
+#ifdef FDT
+DRIVER_MODULE(at91_sdramc, simplebus, at91_sdramc_driver, at91_sdramc_devclass, NULL,
+    NULL);
+#else
+DRIVER_MODULE(at91_sdramc, atmelarm, at91_sdramc_driver, at91_sdramc_devclass, NULL,
+    NULL);
+#endif