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      1 /* $NetBSD: sunxi_de2.c,v 1.2 2021/01/27 03:10:20 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: sunxi_de2.c,v 1.2 2021/01/27 03:10:20 thorpej Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/bus.h>
     34 #include <sys/cpu.h>
     35 #include <sys/device.h>
     36 #include <sys/kmem.h>
     37 
     38 #include <dev/fdt/fdtvar.h>
     39 
     40 #include <arm/sunxi/sunxi_sramc.h>
     41 
     42 static const struct device_compatible_entry compat_data[] = {
     43 	{ .compat = "allwinner,sun50i-a64-de2" },
     44 	DEVICE_COMPAT_EOL
     45 };
     46 
     47 static int
     48 sunxi_de2_match(device_t parent, cfdata_t cf, void *aux)
     49 {
     50 	struct fdt_attach_args * const faa = aux;
     51 
     52 	return of_compatible_match(faa->faa_phandle, compat_data);
     53 }
     54 
     55 static void
     56 sunxi_de2_attach(device_t parent, device_t self, void *aux)
     57 {
     58 	struct fdt_attach_args * const faa = aux;
     59 	const int phandle = faa->faa_phandle;
     60 
     61 	if (sunxi_sramc_claim(phandle) != 0) {
     62 		aprint_error(": cannot map SRAM to DE2\n");
     63 		return;
     64 	}
     65 
     66 	aprint_naive("\n");
     67 	aprint_normal(": DE2 Bus\n");
     68 
     69 	fdt_add_bus(self, phandle, faa);
     70 }
     71 
     72 CFATTACH_DECL_NEW(sunxi_de2bus, 0, sunxi_de2_match, sunxi_de2_attach, NULL, NULL);
     73