1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org>
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 *    without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
15 *    redistribution must be conditioned upon including a substantially
16 *    similar Disclaimer requirement for further binary redistribution.
17 *
18 * NO WARRANTY
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
24 * OR 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
27 * IN 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
29 * THE POSSIBILITY OF SUCH DAMAGES.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <sys/param.h>
36#include <sys/kernel.h>
37#include <sys/lock.h>
38#include <sys/bus.h>
39#include <sys/module.h>
40#include <sys/mutex.h>
41#include <sys/systm.h>
42
43#include <machine/bus.h>
44#include <machine/resource.h>
45
46#include <dev/bhnd/bhnd.h>
47
48#include "bhnd_pmureg.h"
49#include "bhnd_pmuvar.h"
50
51/*
52 * PMU core driver.
53 */
54
55/* Supported device identifiers */
56static const struct bhnd_device bhnd_pmucore_devices[] = {
57	BHND_DEVICE(BCM, PMU, NULL, NULL),
58
59	BHND_DEVICE_END
60};
61
62static int
63bhnd_pmu_core_probe(device_t dev)
64{
65	const struct bhnd_device	*id;
66	int				 error;
67
68	id = bhnd_device_lookup(dev, bhnd_pmucore_devices,
69	     sizeof(bhnd_pmucore_devices[0]));
70	if (id == NULL)
71		return (ENXIO);
72
73	/* Delegate to common driver implementation */
74	if ((error = bhnd_pmu_probe(dev)) > 0)
75		return (error);
76
77	bhnd_set_default_core_desc(dev);
78	return (BUS_PROBE_DEFAULT);
79}
80
81static int
82bhnd_pmu_core_attach(device_t dev)
83{
84	struct bhnd_pmu_softc	*sc;
85	struct bhnd_resource	*res;
86	int			 error;
87	int			 rid;
88
89	sc = device_get_softc(dev);
90
91	/* Allocate register block */
92	rid = 0;
93	res = bhnd_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
94	if (res == NULL) {
95		device_printf(dev, "failed to allocate resources\n");
96		return (ENXIO);
97	}
98
99	/* Allocate our per-core PMU state */
100	if ((error = bhnd_alloc_pmu(dev))) {
101		device_printf(sc->dev, "failed to allocate PMU state: %d\n",
102		    error);
103
104		return (error);
105	}
106
107	/* Delegate to common driver implementation */
108	if ((error = bhnd_pmu_attach(dev, res))) {
109		bhnd_release_resource(dev, SYS_RES_MEMORY, rid, res);
110		return (error);
111	}
112
113	sc->rid = rid;
114	return (0);
115}
116
117static int
118bhnd_pmu_core_detach(device_t dev)
119{
120	struct bhnd_pmu_softc	*sc;
121	int			 error;
122
123	sc = device_get_softc(dev);
124
125	/* Delegate to common driver implementation */
126	if ((error = bhnd_pmu_detach(dev)))
127		return (error);
128
129	bhnd_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
130	return (0);
131}
132
133static device_method_t bhnd_pmucore_methods[] = {
134	/* Device interface */
135	DEVMETHOD(device_probe,		bhnd_pmu_core_probe),
136	DEVMETHOD(device_attach,	bhnd_pmu_core_attach),
137	DEVMETHOD(device_detach,	bhnd_pmu_core_detach),
138
139	DEVMETHOD_END
140};
141
142DEFINE_CLASS_1(bhnd_pmu, bhnd_pmucore_driver, bhnd_pmucore_methods,
143    sizeof(struct bhnd_pmu_softc), bhnd_pmu_driver);
144EARLY_DRIVER_MODULE(bhnd_pmu, bhnd, bhnd_pmucore_driver, bhnd_pmu_devclass,
145    NULL, NULL, BUS_PASS_TIMER + BUS_PASS_ORDER_MIDDLE);
146
147MODULE_DEPEND(bhnd_pmu_core, bhnd_pmu, 1, 1, 1);
148MODULE_VERSION(bhnd_pmu_core, 1);
149