1/* $NetBSD: plcom_acpi.c,v 1.4 2023/01/24 06:56:40 mlelstv Exp $ */
2
3/*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jared McNeill <jmcneill@invisible.ca>.
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: plcom_acpi.c,v 1.4 2023/01/24 06:56:40 mlelstv Exp $");
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/cpu.h>
38#include <sys/device.h>
39#include <sys/termios.h>
40
41#include <dev/acpi/acpireg.h>
42#include <dev/acpi/acpivar.h>
43#include <dev/acpi/acpi_intr.h>
44
45#include <evbarm/dev/plcomreg.h>
46#include <evbarm/dev/plcomvar.h>
47
48static int	plcom_acpi_match(device_t, cfdata_t, void *);
49static void	plcom_acpi_attach(device_t, device_t, void *);
50
51CFATTACH_DECL_NEW(plcom_acpi, sizeof(struct plcom_softc), plcom_acpi_match, plcom_acpi_attach, NULL, NULL);
52
53enum plcom_acpi_variant {
54	PLCOM_ACPI_GENERIC,
55	PLCOM_ACPI_PL011,
56	PLCOM_ACPI_BCM2837
57};
58
59static const struct device_compatible_entry compat_data[] = {
60	{ .compat = "BCM2837",		.value = PLCOM_ACPI_BCM2837 },
61	{ .compat = "ARMH0011",		.value = PLCOM_ACPI_PL011 },
62	{ .compat = "ARMHB000",		.value = PLCOM_ACPI_GENERIC },
63	DEVICE_COMPAT_EOL
64};
65
66static int
67plcom_acpi_match(device_t parent, cfdata_t cf, void *aux)
68{
69	struct acpi_attach_args *aa = aux;
70
71	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
72		return 0;
73
74	return acpi_compatible_match(aa, compat_data);
75}
76
77static void
78plcom_acpi_attach(device_t parent, device_t self, void *aux)
79{
80	struct plcom_softc * const sc = device_private(self);
81	struct acpi_attach_args *aa = aux;
82	struct acpi_resources res;
83	struct acpi_mem *mem;
84	struct acpi_irq *irq;
85	ACPI_STATUS rv;
86	void *ih;
87
88	sc->sc_dev = self;
89
90	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
91	    &res, &acpi_resource_parse_ops_default);
92	if (ACPI_FAILURE(rv))
93		return;
94
95	mem = acpi_res_mem(&res, 0);
96	if (mem == NULL) {
97		aprint_error(": couldn't find mem resource\n");
98		goto done;
99	}
100
101	irq = acpi_res_irq(&res, 0);
102	if (irq == NULL) {
103		aprint_error(": couldn't find irq resource\n");
104		goto done;
105	}
106
107	sc->sc_hwflags = 0;
108	sc->sc_swflags = 0;
109	sc->sc_fifolen = 0;
110	sc->sc_pi.pi_type = PLCOM_TYPE_PL011;
111	sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
112
113	switch (acpi_compatible_lookup(aa, compat_data)->value) {
114	case PLCOM_ACPI_BCM2837:
115		sc->sc_fifolen = 16;
116		break;
117	case PLCOM_ACPI_GENERIC:
118		sc->sc_pi.pi_type = PLCOM_TYPE_GENERIC_UART;
119		break;
120	}
121
122	sc->sc_pi.pi_iot = aa->aa_memt;
123	sc->sc_pi.pi_iobase = mem->ar_base;
124	if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, &sc->sc_pi.pi_ioh) != 0) {
125		aprint_error(": couldn't map registers\n");
126		goto done;
127	}
128
129	plcom_attach_subr(sc);
130
131	ih = acpi_intr_establish(self, (uint64_t)aa->aa_node->ad_handle,
132	    IPL_SERIAL, true, plcomintr, sc, device_xname(self));
133	if (ih == NULL) {
134		aprint_error_dev(self, "couldn't install interrupt handler\n");
135		return;
136	}
137
138done:
139	acpi_resource_cleanup(&res);
140}
141