Author: ganbold
Date: Mon Mar 3 11:24:47 2014
New Revision: 262709
URL: http://svnweb.freebsd.org/changeset/base/262709
Log:
Add Static Random Access Memory controller driver for A10/A20.
A10/A20's SRAM is used by devices, such as CPU, EMAC,
for extra fast memory or as cache.
Approved by: stas (mentor)
Added:
head/sys/arm/allwinner/a10_sramc.c (contents, props changed)
head/sys/arm/allwinner/a10_sramc.h (contents, props changed)
Added: head/sys/arm/allwinner/a10_sramc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/allwinner/a10_sramc.c Mon Mar 3 11:24:47 2014
(r262709)
@@ -0,0 +1,134 @@
+/*-
+ * Copyright (c) 2013 Ganbold Tsagaankhuu <ganb...@gmail.com>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#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/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/watchdog.h>
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/frame.h>
+#include <machine/intr.h>
+#include <machine/fdt.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "a10_sramc.h"
+
+#define SRAM_CTL1_CFG 0x04
+
+struct a10_sramc_softc {
+ struct resource *res;
+ bus_space_tag_t bst;
+ bus_space_handle_t bsh;
+};
+
+static struct a10_sramc_softc *a10_sramc_sc;
+
+#define sramc_read_4(sc, reg) \
+ bus_space_read_4((sc)->bst, (sc)->bsh, (reg))
+#define sramc_write_4(sc, reg, val) \
+ bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val))
+
+
+static int
+a10_sramc_probe(device_t dev)
+{
+
+ if (ofw_bus_is_compatible(dev, "allwinner,sun4i-sramc")) {
+ device_set_desc(dev, "Allwinner sramc module");
+ return (BUS_PROBE_DEFAULT);
+ }
+
+ return (ENXIO);
+}
+
+static int
+a10_sramc_attach(device_t dev)
+{
+ struct a10_sramc_softc *sc = device_get_softc(dev);
+ int rid = 0;
+
+ sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
+ if (!sc->res) {
+ device_printf(dev, "could not allocate resource\n");
+ return (ENXIO);
+ }
+
+ sc->bst = rman_get_bustag(sc->res);
+ sc->bsh = rman_get_bushandle(sc->res);
+
+ a10_sramc_sc = sc;
+
+ return (0);
+}
+
+static device_method_t a10_sramc_methods[] = {
+ DEVMETHOD(device_probe, a10_sramc_probe),
+ DEVMETHOD(device_attach, a10_sramc_attach),
+ { 0, 0 }
+};
+
+static driver_t a10_sramc_driver = {
+ "a10_sramc",
+ a10_sramc_methods,
+ sizeof(struct a10_sramc_softc),
+};
+
+static devclass_t a10_sramc_devclass;
+
+DRIVER_MODULE(a10_sramc, simplebus, a10_sramc_driver, a10_sramc_devclass, 0,
0);
+
+int
+a10_map_to_emac(void)
+{
+ struct a10_sramc_softc *sc = a10_sramc_sc;
+ uint32_t reg_value;
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ /* Map SRAM to EMAC, set bit 2 and 4. */
+ reg_value = sramc_read_4(sc, SRAM_CTL1_CFG);
+ reg_value |= 0x5 << 2;
+ sramc_write_4(sc, SRAM_CTL1_CFG, reg_value);
+
+ return (0);
+}
Added: head/sys/arm/allwinner/a10_sramc.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/allwinner/a10_sramc.h Mon Mar 3 11:24:47 2014
(r262709)
@@ -0,0 +1,34 @@
+/*-
+ * Copyright (c) 2013 Ganbold Tsagaankhuu <ganb...@gmail.com>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _A10_SRAMC_H_
+#define _A10_SRAMC_H_
+
+int a10_map_to_emac(void);
+
+#endif
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