1 /* $NetBSD: a9wdt_fdt.c,v 1.4 2021/08/07 16:18:43 thorpej 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 1.4 2021/08/07 16:18:43 thorpej 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 const struct device_compatible_entry compat_data[] = {
71 { .compat = "arm,cortex-a9-twd-wdt" },
72 { .compat = "arm,cortex-a5-twd-wdt" },
73 DEVICE_COMPAT_EOL
74 };
75
76 static int
a9wdt_fdt_match(device_t parent,cfdata_t cf,void * aux)77 a9wdt_fdt_match(device_t parent, cfdata_t cf, void *aux)
78 {
79 struct fdt_attach_args * const faa = aux;
80
81 return of_compatible_match(faa->faa_phandle, compat_data);
82 }
83
84 static void
a9wdt_fdt_attach(device_t parent,device_t self,void * aux)85 a9wdt_fdt_attach(device_t parent, device_t self, void *aux)
86 {
87 struct a9wdt_fdt_softc * const sc = device_private(self);
88 struct fdt_attach_args * const faa = aux;
89 const int phandle = faa->faa_phandle;
90 bus_space_handle_t bsh;
91
92 sc->sc_dev = self;
93
94 char intrstr[128];
95 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
96 aprint_error(": failed to decode interrupt\n");
97 return;
98 }
99
100 aprint_naive("\n");
101 aprint_normal("\n");
102
103 bus_addr_t addr;
104 bus_size_t size;
105 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
106 aprint_error(": couldn't get registers\n");
107 return;
108 }
109 if (bus_space_map(faa->faa_bst, addr, size, 0, &bsh)) {
110 aprint_error(": couldn't map registers\n");
111 return;
112 }
113
114 struct mpcore_attach_args mpcaa = {
115 .mpcaa_name = "a9wdt",
116 .mpcaa_memt = faa->faa_bst,
117 .mpcaa_memh = bsh,
118 .mpcaa_irq = -1,
119 };
120
121 config_found(self, &mpcaa, NULL, CFARGS_NONE);
122 }
123
124