1 /*- 2 * Copyright (c) 2013 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_platform.h" 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 34 #include <arm/include/platform.h> 35 #include <arm/include/platformvar.h> 36 37 #include <dev/ofw/openfirm.h> 38 #include <dev/ofw/ofw_bus_subr.h> 39 #include <dev/fdt/fdt_common.h> 40 41 #include "platform_if.h" 42 43 #define FDT_PLATFORM(plat) \ 44 ((fdt_platform_def_t *)(plat)->cls->baseclasses[0]) 45 46 static int 47 fdt_platform_probe(platform_t plat) 48 { 49 const char *compat; 50 phandle_t root; 51 52 /* 53 * TODO: Make these KASSERTs, we should only be here if we 54 * are using the FDT platform magic. 55 */ 56 if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL) 57 return 1; 58 59 /* Is the device is compatible? */ 60 root = OF_finddevice("/"); 61 compat = FDT_PLATFORM(plat)->fdt_compatible; 62 if (ofw_bus_node_is_compatible(root, compat) != 0) 63 return 0; 64 65 /* Not compatible, return an error */ 66 return 1; 67 } 68 69 platform_method_t fdt_platform_methods[] = { 70 PLATFORMMETHOD(platform_probe, fdt_platform_probe), 71 PLATFORMMETHOD_END 72 }; 73 74