OsdInterrupt.c revision 122500 
1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, 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 *	$FreeBSD: head/sys/dev/acpica/Osd/OsdInterrupt.c 122500 2003-11-11 18:12:12Z jhb $
28 */
29
30/*
31 * 6.5 : Interrupt handling
32 */
33
34#include "acpi.h"
35
36#include <sys/bus.h>
37#include <machine/resource.h>
38#include <machine/bus.h>
39#include <sys/rman.h>
40
41#include <dev/acpica/acpivar.h>
42
43#define _COMPONENT	ACPI_OS_SERVICES
44ACPI_MODULE_NAME("INTERRUPT")
45
46static void		InterruptWrapper(void *arg);
47static OSD_HANDLER	InterruptHandler;
48
49static UINT32 InterruptOverride = 0;
50
51/*
52 * XXX this does not correctly free resources in the case of partically successful
53 * attachment.
54 */
55ACPI_STATUS
56AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine, void *Context)
57{
58    struct acpi_softc	*sc;
59
60    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
61
62    if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
63	panic("can't find ACPI device to register interrupt");
64    if (sc->acpi_dev == NULL)
65	panic("acpi softc has invalid device");
66
67    if ((InterruptNumber < 0) || (InterruptNumber > 255))
68	return_ACPI_STATUS(AE_BAD_PARAMETER);
69    if (ServiceRoutine == NULL)
70	return_ACPI_STATUS(AE_BAD_PARAMETER);
71    if (InterruptHandler != NULL && InterruptHandler != ServiceRoutine) {
72	device_printf(sc->acpi_dev, "can't register more than one ACPI interrupt\n");
73	return_ACPI_STATUS(AE_BAD_PARAMETER);
74    }
75    InterruptHandler = ServiceRoutine;
76
77    /*
78     * This isn't strictly true, as we ought to be able to handle > 1 interrupt.  The ACPI
79     * spec doesn't call for this though.
80     */
81    if (sc->acpi_irq != NULL) {
82	device_printf(sc->acpi_dev, "attempt to register more than one interrupt handler\n");
83	return_ACPI_STATUS(AE_ALREADY_EXISTS);
84    }
85    sc->acpi_irq_rid = 0;
86    if (InterruptOverride != 0) {
87	    device_printf(sc->acpi_dev,
88		"Overriding SCI Interrupt from IRQ %u to IRQ %u\n",
89		InterruptNumber, InterruptOverride);
90	    InterruptNumber = InterruptOverride;
91    }
92    bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1);
93    if ((sc->acpi_irq = bus_alloc_resource(sc->acpi_dev, SYS_RES_IRQ, &sc->acpi_irq_rid, 0, ~0, 1,
94					   RF_SHAREABLE | RF_ACTIVE)) == NULL) {
95	device_printf(sc->acpi_dev, "could not allocate SCI interrupt\n");
96	return_ACPI_STATUS(AE_ALREADY_EXISTS);
97    }
98    if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC, (driver_intr_t *)InterruptWrapper,
99		       Context, &sc->acpi_irq_handle)) {
100	device_printf(sc->acpi_dev, "could not set up SCI interrupt\n");
101	return_ACPI_STATUS(AE_ALREADY_EXISTS);
102    }
103
104    return_ACPI_STATUS(AE_OK);
105}
106
107ACPI_STATUS
108AcpiOsRemoveInterruptHandler (UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine)
109{
110    struct acpi_softc	*sc;
111
112    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
113
114    if ((InterruptNumber < 0) || (InterruptNumber > 255))
115	return_ACPI_STATUS(AE_BAD_PARAMETER);
116    if (ServiceRoutine == NULL)
117	return_ACPI_STATUS(AE_BAD_PARAMETER);
118
119    if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
120	panic("can't find ACPI device to deregister interrupt");
121
122    if (sc->acpi_irq == NULL)
123	return_ACPI_STATUS(AE_NOT_EXIST);
124
125    bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
126    bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
127    bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
128
129    sc->acpi_irq = NULL;
130
131    return_ACPI_STATUS(AE_OK);
132}
133
134ACPI_STATUS
135acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
136{
137
138	if (InterruptOverride != 0)
139		return_ACPI_STATUS(AE_ALREADY_EXISTS);
140	InterruptOverride = InterruptNumber;
141	return_ACPI_STATUS(AE_OK);
142}
143
144/*
145 * Interrupt handler wrapper.
146 */
147static void
148InterruptWrapper(void *arg)
149{
150    ACPI_LOCK_DECL;
151
152    ACPI_LOCK;
153    InterruptHandler(arg);
154    ACPI_UNLOCK;
155}
156