Date: Mon, 3 Mar 2014 11:24:48 +0000 (UTC) From: Ganbold Tsagaankhuu <ganbold@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r262709 - head/sys/arm/allwinner Message-ID: <201403031124.s23BOmPa075237@svn.freebsd.org>
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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 <ganbold@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 <ganbold@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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