OsdInterrupt.c revision 193530 
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
28/*
29 * 6.5 : Interrupt handling
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/sys/dev/acpica/Osd/OsdInterrupt.c 193530 2009-06-05 18:44:36Z jkim $");
34
35#include <sys/param.h>
36#include <sys/kernel.h>
37#include <sys/bus.h>
38#include <machine/bus.h>
39#include <machine/resource.h>
40#include <sys/rman.h>
41
42#include <contrib/dev/acpica/include/acpi.h>
43#include <contrib/dev/acpica/include/accommon.h>
44
45#include <dev/acpica/acpivar.h>
46
47#define _COMPONENT	ACPI_OS_SERVICES
48ACPI_MODULE_NAME("INTERRUPT")
49
50static UINT32		InterruptOverride = 0;
51
52ACPI_STATUS
53AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
54    ACPI_OSD_HANDLER ServiceRoutine, void *Context)
55{
56    struct acpi_softc	*sc;
57
58    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
59
60    if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
61	panic("can't find ACPI device to register interrupt");
62    if (sc->acpi_dev == NULL)
63	panic("acpi softc has invalid device");
64
65    if (InterruptNumber < 0 || InterruptNumber > 255)
66	return_ACPI_STATUS (AE_BAD_PARAMETER);
67    if (ServiceRoutine == NULL)
68	return_ACPI_STATUS (AE_BAD_PARAMETER);
69
70    /*
71     * If the MADT contained an interrupt override directive for the SCI,
72     * we use that value instead of the one from the FADT.
73     */
74    if (InterruptOverride != 0) {
75	    device_printf(sc->acpi_dev,
76		"Overriding SCI Interrupt from IRQ %u to IRQ %u\n",
77		InterruptNumber, InterruptOverride);
78	    InterruptNumber = InterruptOverride;
79    }
80
81    /* Set up the interrupt resource. */
82    sc->acpi_irq_rid = 0;
83    bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1);
84    sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
85	&sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
86    if (sc->acpi_irq == NULL) {
87	device_printf(sc->acpi_dev, "could not allocate interrupt\n");
88	goto error;
89    }
90    if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC|INTR_MPSAFE,
91	NULL, (driver_intr_t *)ServiceRoutine, Context, &sc->acpi_irq_handle)) {
92	device_printf(sc->acpi_dev, "could not set up interrupt\n");
93	goto error;
94    }
95
96    return_ACPI_STATUS (AE_OK);
97
98error:
99    if (sc->acpi_irq_handle)
100	bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
101    sc->acpi_irq_handle = NULL;
102    if (sc->acpi_irq)
103	bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
104    sc->acpi_irq = NULL;
105    bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
106
107    return_ACPI_STATUS (AE_ALREADY_EXISTS);
108}
109
110ACPI_STATUS
111AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
112{
113    struct acpi_softc	*sc;
114
115    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
116
117    if (InterruptNumber < 0 || InterruptNumber > 255)
118	return_ACPI_STATUS (AE_BAD_PARAMETER);
119    if (ServiceRoutine == NULL)
120	return_ACPI_STATUS (AE_BAD_PARAMETER);
121
122    if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
123	panic("can't find ACPI device to deregister interrupt");
124
125    if (sc->acpi_irq == NULL)
126	return_ACPI_STATUS (AE_NOT_EXIST);
127
128    bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
129    bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
130    bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
131
132    sc->acpi_irq = NULL;
133
134    return_ACPI_STATUS (AE_OK);
135}
136
137ACPI_STATUS
138acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
139{
140
141    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
142
143    if (InterruptOverride != 0)
144	return_ACPI_STATUS (AE_ALREADY_EXISTS);
145    InterruptOverride = InterruptNumber;
146    return_ACPI_STATUS (AE_OK);
147}
148