1 /* $NetBSD: plkmi_fdt.c,v 1.3 2021/01/27 03:10:19 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@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: plkmi_fdt.c,v 1.3 2021/01/27 03:10:19 thorpej Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/device.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37
38 #include <dev/fdt/fdtvar.h>
39
40 #include <dev/ic/pl050var.h>
41
42 static int plkmi_fdt_match(device_t, cfdata_t, void *);
43 static void plkmi_fdt_attach(device_t, device_t, void *);
44
45 static const struct device_compatible_entry compat_data[] = {
46 { .compat = "arm,pl050" },
47 DEVICE_COMPAT_EOL
48 };
49
50 CFATTACH_DECL_NEW(plkmi_fdt, sizeof(struct plkmi_softc),
51 plkmi_fdt_match, plkmi_fdt_attach, NULL, NULL);
52
53 static int
plkmi_fdt_match(device_t parent,cfdata_t cf,void * aux)54 plkmi_fdt_match(device_t parent, cfdata_t cf, void *aux)
55 {
56 struct fdt_attach_args * const faa = aux;
57
58 return of_compatible_match(faa->faa_phandle, compat_data);
59 }
60
61 static void
plkmi_fdt_attach(device_t parent,device_t self,void * aux)62 plkmi_fdt_attach(device_t parent, device_t self, void *aux)
63 {
64 struct plkmi_softc * const sc = device_private(self);
65 struct fdt_attach_args * const faa = aux;
66 const int phandle = faa->faa_phandle;
67 char intrstr[128];
68 struct clk *clk;
69 bus_addr_t addr;
70 bus_size_t size;
71 void *ih;
72
73 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
74 aprint_error(": missing 'reg' property\n");
75 return;
76 }
77
78 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
79 aprint_error_dev(self, "failed to decode interrupt\n");
80 return;
81 }
82
83
84 for (int i = 0; (clk = fdtbus_clock_get_index(phandle, i)); i++)
85 if (clk_enable(clk) != 0) {
86 aprint_error(": couldn't enable clock #%d\n", i);
87 return;
88 }
89
90 sc->sc_dev = self;
91 sc->sc_bst = faa->faa_bst;
92 if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) {
93 aprint_error(": couldn't map device\n");
94 return;
95 }
96
97 plkmi_attach(sc);
98
99 ih = fdtbus_intr_establish_xname(phandle, 0, IPL_TTY, 0, plkmi_intr, sc,
100 device_xname(self));
101 if (ih == NULL) {
102 aprint_error_dev(self, "couldn't install interrupt handler\n");
103 return;
104 }
105 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
106 }
107