1/* $NetBSD: ipmi_acpi.c,v 1.6 2021/08/07 16:19:09 thorpej 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 Michael van Elst
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: ipmi_acpi.c,v 1.6 2021/08/07 16:19:09 thorpej Exp $");
34
35#include <sys/param.h>
36#include <sys/device.h>
37#include <sys/module.h>
38#include <sys/systm.h>
39
40#include <dev/acpi/acpireg.h>
41#include <dev/acpi/acpivar.h>
42
43#include <dev/ipmivar.h>
44
45#define _COMPONENT		ACPI_RESOURCE_COMPONENT
46ACPI_MODULE_NAME		("ipmi_acpi")
47
48typedef struct ipmi_acpi_softc {
49	device_t		sc_dev;
50	bool			sc_init;
51} ipmi_acpi_softc_t;
52
53static int	ipmi_acpi_match(device_t, cfdata_t, void *);
54static void	ipmi_acpi_attach(device_t, device_t, void *);
55static int	ipmi_acpi_detach(device_t, int);
56
57CFATTACH_DECL3_NEW(ipmi_acpi, sizeof(ipmi_acpi_softc_t),
58    ipmi_acpi_match, ipmi_acpi_attach, ipmi_acpi_detach, NULL, NULL, NULL,
59    DVF_DETACH_SHUTDOWN);
60
61static const struct device_compatible_entry compat_data[] = {
62	{ .compat = "IPI0001" },
63	DEVICE_COMPAT_EOL
64};
65
66static int
67ipmi_acpi_match(device_t parent, cfdata_t match, void *opaque)
68{
69	struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque;
70
71	return acpi_compatible_match(aa, compat_data);
72}
73
74static void
75ipmi_acpi_attach(device_t parent, device_t self, void *opaque)
76{
77	ipmi_acpi_softc_t *sc = device_private(self);
78	struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque;
79	ACPI_STATUS rv;
80	ACPI_INTEGER itype, ivers, adr;
81	struct acpi_resources res;
82	struct acpi_io *io;
83	struct acpi_mem *mem;
84#if notyet
85	struct acpi_irq *irq;
86#endif
87	struct ipmi_attach_args IA, *ia = &IA;
88	bus_addr_t reg2;
89	uint16_t i2caddr;
90
91	sc->sc_dev = self;
92
93	aprint_naive("\n");
94
95	rv = acpi_eval_integer(aa->aa_node->ad_handle, "_IFT", &itype);
96	if (ACPI_FAILURE(rv)) {
97		aprint_error("no _IFT\n");
98		return;
99	}
100
101	rv = acpi_eval_integer(aa->aa_node->ad_handle, "_SRV", &ivers);
102	if (ACPI_FAILURE(rv)) {
103		aprint_error("no _SRV\n");
104		return;
105	}
106
107	switch (itype) {
108	case IPMI_IF_KCS:
109	case IPMI_IF_SMIC:
110	case IPMI_IF_BT:
111		rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
112			&res, &acpi_resource_parse_ops_default);
113		if (ACPI_FAILURE(rv)) {
114			aprint_normal("\n");
115			aprint_error_dev(self, "no resources\n");
116			return;
117		}
118
119		io = acpi_res_io(&res, 0);
120		mem = acpi_res_mem(&res, 0);
121		if (io == NULL && mem == NULL) {
122			aprint_error_dev(self, "no resources\n");
123			return;
124		}
125
126#if notyet
127		if ((irq = acpi_res_irq(&res, 0)) != NULL) {
128			aprint_normal_dev(self, "IRQ %d type %d\n",
129				irq->ar_irq, irq->ar_type);
130		} else {
131			aprint_error_dev(self, "no interrupt\n");
132		}
133#endif
134		ia->iaa_iot = aa->aa_iot;
135		ia->iaa_memt = aa->aa_memt;
136
137		ia->iaa_if_type = itype;
138		ia->iaa_if_rev = ivers;
139		ia->iaa_if_iotype = io ? 'i' : 'm';
140		ia->iaa_if_iobase = io ? io->ar_base : mem->ar_base;
141		ia->iaa_if_iospacing = 1;
142		ia->iaa_if_irq = -1;
143		ia->iaa_if_irqlvl = 0;
144
145		reg2 = 0;
146		if (io) {
147			io = acpi_res_io(&res, 1);
148			if (io != NULL)
149				reg2 = (bus_addr_t)io->ar_base;
150		} else {
151			mem = acpi_res_mem(&res, 1);
152			if (mem != NULL)
153				reg2 = mem->ar_base;
154		}
155
156		if (reg2 > ia->iaa_if_iobase)
157			ia->iaa_if_iospacing = reg2 - ia->iaa_if_iobase;
158
159		config_found(self, ia, NULL, CFARGS_NONE);
160
161		break;
162	case IPMI_IF_SSIF:
163		rv = acpi_eval_integer(aa->aa_node->ad_handle, "_ADR", &adr);
164		if (ACPI_FAILURE(rv)) {
165			aprint_normal("\n");
166			aprint_error_dev(self, "no resources\n");
167			return;
168		}
169		if (adr > 65535) {
170			aprint_normal("\n");
171			aprint_error_dev(self, "i2c address out of range\n");
172			return;
173		}
174		i2caddr = adr;
175
176		aprint_normal(": i2c 0x%x\n", i2caddr);
177		break;
178	default:
179		aprint_normal("\n");
180		aprint_error_dev(self, "unknown interface type\n");
181		return;
182	}
183
184	sc->sc_init = true;
185
186	if (!pmf_device_register(self, NULL, NULL))
187		aprint_error_dev(self, "couldn't establish power handler\n");
188}
189
190static int
191ipmi_acpi_detach(device_t self, int flags)
192{
193	struct ipmi_acpi_softc *sc = device_private(self);
194	int rc;
195
196	if (!sc->sc_init)
197		return 0;
198
199	rc = config_detach_children(self, flags);
200	if (rc)
201		return rc;
202
203	pmf_device_deregister(self);
204	return 0;
205}
206