diff options
Diffstat (limited to 'sys/dev/siba/siba_sdram.c')
-rw-r--r-- | sys/dev/siba/siba_sdram.c | 114 |
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); |