openpic_ofw.c revision 257059 
1/*-
2 * Copyright 2003 by Peter Grehan. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/powerpc/ofw/openpic_ofw.c 257059 2013-10-24 15:37:32Z nwhitehorn $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/module.h>
35#include <sys/bus.h>
36#include <sys/conf.h>
37#include <sys/kernel.h>
38
39#include <dev/ofw/ofw_bus.h>
40#include <dev/ofw/ofw_bus_subr.h>
41#include <dev/ofw/openfirm.h>
42
43#include <machine/bus.h>
44#include <machine/intr_machdep.h>
45#include <machine/md_var.h>
46#include <machine/pio.h>
47#include <machine/resource.h>
48
49#include <vm/vm.h>
50#include <vm/pmap.h>
51
52#include <sys/rman.h>
53
54#include <machine/openpicvar.h>
55
56#include "pic_if.h"
57
58/*
59 * OFW interface
60 */
61static int	openpic_ofw_probe(device_t);
62static int	openpic_ofw_attach(device_t);
63
64static void	openpic_ofw_translate_code(device_t, u_int irq, int code,
65		    enum intr_trigger *trig, enum intr_polarity *pol);
66
67static device_method_t  openpic_ofw_methods[] = {
68	/* Device interface */
69	DEVMETHOD(device_probe,		openpic_ofw_probe),
70	DEVMETHOD(device_attach,	openpic_ofw_attach),
71
72	/* PIC interface */
73	DEVMETHOD(pic_bind,		openpic_bind),
74	DEVMETHOD(pic_config,		openpic_config),
75	DEVMETHOD(pic_dispatch,		openpic_dispatch),
76	DEVMETHOD(pic_enable,		openpic_enable),
77	DEVMETHOD(pic_eoi,		openpic_eoi),
78	DEVMETHOD(pic_ipi,		openpic_ipi),
79	DEVMETHOD(pic_mask,		openpic_mask),
80	DEVMETHOD(pic_unmask,		openpic_unmask),
81
82	DEVMETHOD(pic_translate_code,	openpic_ofw_translate_code),
83
84	DEVMETHOD_END
85};
86
87static driver_t openpic_ofw_driver = {
88	"openpic",
89	openpic_ofw_methods,
90	sizeof(struct openpic_softc),
91};
92
93DRIVER_MODULE(openpic, nexus, openpic_ofw_driver, openpic_devclass, 0, 0);
94DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, openpic_devclass, 0, 0);
95DRIVER_MODULE(openpic, macio, openpic_ofw_driver, openpic_devclass, 0, 0);
96
97static int
98openpic_ofw_probe(device_t dev)
99{
100	const char *type = ofw_bus_get_type(dev);
101
102	if (type == NULL)
103                return (ENXIO);
104
105	if (!ofw_bus_is_compatible(dev, "chrp,open-pic") &&
106	    strcmp(type, "open-pic") != 0)
107                return (ENXIO);
108
109	/*
110	 * On some U4 systems, there is a phantom MPIC in the mac-io cell.
111	 * The uninorth driver will pick up the real PIC, so ignore it here.
112	 */
113	if (OF_finddevice("/u4") != (phandle_t)-1)
114		return (ENXIO);
115
116	device_set_desc(dev, OPENPIC_DEVSTR);
117	return (0);
118}
119
120static int
121openpic_ofw_attach(device_t dev)
122{
123	phandle_t xref, node;
124
125	node = ofw_bus_get_node(dev);
126
127	if (OF_getprop(node, "phandle", &xref, sizeof(xref)) == -1 &&
128	    OF_getprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 &&
129	    OF_getprop(node, "linux,phandle", &xref, sizeof(xref)) == -1)
130		xref = node;
131
132	return (openpic_common_attach(dev, xref));
133}
134
135static void
136openpic_ofw_translate_code(device_t dev, u_int irq, int code,
137    enum intr_trigger *trig, enum intr_polarity *pol)
138{
139	switch (code) {
140	case 0:
141		/* L to H edge */
142		*trig = INTR_TRIGGER_EDGE;
143		*pol = INTR_POLARITY_HIGH;
144		break;
145	case 1:
146		/* Active L level */
147		*trig = INTR_TRIGGER_LEVEL;
148		*pol = INTR_POLARITY_LOW;
149		break;
150	case 2:
151		/* Active H level */
152		*trig = INTR_TRIGGER_LEVEL;
153		*pol = INTR_POLARITY_HIGH;
154		break;
155	case 3:
156		/* H to L edge */
157		*trig = INTR_TRIGGER_EDGE;
158		*pol = INTR_POLARITY_LOW;
159		break;
160	default:
161		*trig = INTR_TRIGGER_CONFORM;
162		*pol = INTR_POLARITY_CONFORM;
163	}
164}
165
166