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author | imp <imp@FreeBSD.org> | 2014-02-28 02:59:51 +0000 |
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committer | imp <imp@FreeBSD.org> | 2014-02-28 02:59:51 +0000 |
commit | a08374e3609a891b7a48835da353201a05b687ea (patch) | |
tree | 5363ef1e064dd8df948b55a4abc2966c254e2d11 /sys/arm/at91/at91_sdramc.c | |
parent | d25562aaf79bd794ee548d1645e1f04d7f50628e (diff) | |
download | FreeBSD-src-a08374e3609a891b7a48835da353201a05b687ea.zip FreeBSD-src-a08374e3609a891b7a48835da353201a05b687ea.tar.gz |
Add device node for SDRAMC device. Currently just claims device's
resources.
Diffstat (limited to 'sys/arm/at91/at91_sdramc.c')
-rw-r--r-- | sys/arm/at91/at91_sdramc.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sys/arm/at91/at91_sdramc.c b/sys/arm/at91/at91_sdramc.c new file mode 100644 index 0000000..99787ba --- /dev/null +++ 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 |