bcm_mipscore.c revision 301698 
1/*-
2 * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/sys/mips/broadcom/bcm_mipscore.c 301698 2016-06-08 21:38:51Z landonf $");
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/module.h>
37#include <sys/systm.h>
38#include <sys/errno.h>
39#include <sys/rman.h>
40#include <sys/stddef.h>
41
42#include <machine/bus.h>
43#include <machine/resource.h>
44
45#include <dev/bhnd/bhnd.h>
46#include <dev/bhnd/bhndvar.h>
47#include <dev/bhnd/bhnd_ids.h>
48
49#include "bcm_mipscore.h"
50
51static const struct resource_spec mipscore_rspec[MIPSCORE_MAX_RSPEC] = {
52	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
53	{ -1, -1, 0 }
54};
55
56#define	MIPSCORE_DEV(_vendor, _core)	\
57	BHND_DEVICE(_vendor, _core, NULL, NULL, BHND_DF_SOC)
58
59struct bhnd_device mipscore_match[] = {
60	MIPSCORE_DEV(BCM, MIPS),
61	MIPSCORE_DEV(BCM, MIPS33),
62	MIPSCORE_DEV(MIPS, MIPS74K),
63	BHND_DEVICE_END
64};
65
66static int
67mipscore_probe(device_t dev)
68{
69	const struct bhnd_device *id;
70
71	id = bhnd_device_lookup(dev, mipscore_match, sizeof(mipscore_match[0]));
72	if (id == NULL)
73		return (ENXIO);
74
75	bhnd_set_default_core_desc(dev);
76	return (BUS_PROBE_DEFAULT);
77}
78
79static int
80mipscore_attach(device_t dev)
81{
82	struct mipscore_softc 	*sc;
83	struct resource 	*res;
84	uint32_t		 intmask;
85	uint16_t		 devid;
86	int			 error;
87
88	sc = device_get_softc(dev);
89	devid = bhnd_get_device(dev);
90
91	sc->devid = devid;
92	sc->dev = dev;
93
94	/* Allocate bus resources */
95	memcpy(sc->rspec, mipscore_rspec, sizeof(sc->rspec));
96	error = bhnd_alloc_resources(dev, sc->rspec, sc->res);
97	if (error)
98		return (error);
99
100	res = sc->res[0]->res;
101	if (res == NULL)
102		return (ENXIO);
103
104	if (devid == BHND_COREID_MIPS74K) {
105		intmask = (1 << 31);
106		/* Use intmask5 register to route the timer interrupt */
107		bus_write_4(res, offsetof(struct mipscore_regs, intmask[5]),
108				intmask);
109	}
110
111	return (0);
112}
113
114static device_method_t mipscore_methods[] = {
115		DEVMETHOD(device_probe, 	mipscore_probe),
116		DEVMETHOD(device_attach,	mipscore_attach),
117		DEVMETHOD_END
118};
119
120devclass_t bhnd_mipscore_devclass;
121
122DEFINE_CLASS_0(bhnd_mips, mipscore_driver, mipscore_methods,
123    sizeof(struct mipscore_softc));
124EARLY_DRIVER_MODULE(bhnd_mips, bhnd, mipscore_driver,
125    bhnd_mipscore_devclass, 0, 0, BUS_PASS_CPU + BUS_PASS_ORDER_EARLY);
126MODULE_VERSION(bhnd_mips, 1);
127