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a9wdt_fdt.c revision 1.1 
      1 /* $NetBSD: a9wdt_fdt.c,v 1.1 2019/08/10 17:03:59 skrll Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nick Hudson
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: a9wdt_fdt.c,v 1.1 2019/08/10 17:03:59 skrll Exp $");
     34 
     35 #if 0
     36 #include <sys/param.h>
     37 #include <sys/bus.h>
     38 #include <sys/device.h>
     39 #include <sys/intr.h>
     40 #include <sys/systm.h>
     41 #include <sys/kernel.h>
     42 #include <sys/kmem.h>
     43 
     44 #include <arm/cortex/a9tmr_intr.h>
     45 #include <arm/cortex/mpcore_var.h>
     46 #include <arm/cortex/a9tmr_var.h>
     47 #endif
     48 
     49 
     50 #include <sys/param.h>
     51 #include <sys/bus.h>
     52 
     53 #include <arm/cortex/mpcore_var.h>
     54 
     55 
     56 #include <dev/fdt/fdtvar.h>
     57 #include <arm/fdt/arm_fdtvar.h>
     58 
     59 static int	a9wdt_fdt_match(device_t, cfdata_t, void *);
     60 static void	a9wdt_fdt_attach(device_t, device_t, void *);
     61 
     62 struct a9wdt_fdt_softc {
     63 	device_t	sc_dev;
     64 	struct clk	*sc_clk;
     65 };
     66 
     67 CFATTACH_DECL_NEW(a9wdt_fdt, sizeof(struct a9wdt_fdt_softc),
     68     a9wdt_fdt_match, a9wdt_fdt_attach, NULL, NULL);
     69 
     70 static int
     71 a9wdt_fdt_match(device_t parent, cfdata_t cf, void *aux)
     72 {
     73 	const char * const compatible[] = {
     74 		"arm,cortex-a9-twd-wdt",
     75 		"arm,cortex-a5-twd-wdt",
     76 		NULL
     77 	};
     78 	struct fdt_attach_args * const faa = aux;
     79 
     80 	return of_compatible(faa->faa_phandle, compatible) >= 0;
     81 }
     82 
     83 static void
     84 a9wdt_fdt_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct a9wdt_fdt_softc * const sc = device_private(self);
     87 	struct fdt_attach_args * const faa = aux;
     88 	const int phandle = faa->faa_phandle;
     89 	bus_space_handle_t bsh;
     90 
     91 	sc->sc_dev = self;
     92 
     93 	char intrstr[128];
     94 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
     95 		aprint_error(": failed to decode interrupt\n");
     96 		return;
     97 	}
     98 
     99 	aprint_naive("\n");
    100 	aprint_normal("\n");
    101 
    102 	bus_addr_t addr;
    103 	bus_size_t size;
    104 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
    105 		aprint_error(": couldn't get registers\n");
    106 		return;
    107 	}
    108 	if (bus_space_map(faa->faa_bst, addr, size, 0, &bsh)) {
    109 		aprint_error(": couldn't map registers\n");
    110 		return;
    111 	}
    112 
    113 	struct mpcore_attach_args mpcaa = {
    114 		.mpcaa_name = "a9wdt",
    115 		.mpcaa_memt = faa->faa_bst,
    116 		.mpcaa_memh = bsh,
    117 		.mpcaa_irq = -1,
    118 	};
    119 
    120 	config_found(self, &mpcaa, NULL);
    121 }
    122 
    123