plkmi_fdt.c revision 1.3 
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
42static int	plkmi_fdt_match(device_t, cfdata_t, void *);
43static void	plkmi_fdt_attach(device_t, device_t, void *);
44
45static const struct device_compatible_entry compat_data[] = {
46	{ .compat = "arm,pl050" },
47	DEVICE_COMPAT_EOL
48};
49
50CFATTACH_DECL_NEW(plkmi_fdt, sizeof(struct plkmi_softc),
51	plkmi_fdt_match, plkmi_fdt_attach, NULL, NULL);
52
53static int
54plkmi_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
61static void
62plkmi_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