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 * $FreeBSD$ 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 44 ACPI_MODULE_NAME("INTERRUPT") 45 46 static void InterruptWrapper(void *arg); 47 static OSD_HANDLER InterruptHandler; 48 49 /* 50 * XXX this does not correctly free resources in the case of partically successful 51 * attachment. 52 */ 53 ACPI_STATUS 54 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine, void *Context) 55 { 56 struct acpi_softc *sc; 57 58 ACPI_FUNCTION_TRACE(__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 if (InterruptHandler != NULL && InterruptHandler != ServiceRoutine) { 70 device_printf(sc->acpi_dev, "can't register more than one ACPI interrupt\n"); 71 return_ACPI_STATUS(AE_BAD_PARAMETER); 72 } 73 InterruptHandler = ServiceRoutine; 74 75 /* 76 * This isn't strictly true, as we ought to be able to handle > 1 interrupt. The ACPI 77 * spec doesn't call for this though. 78 */ 79 if (sc->acpi_irq != NULL) { 80 device_printf(sc->acpi_dev, "attempt to register more than one interrupt handler\n"); 81 return_ACPI_STATUS(AE_ALREADY_EXISTS); 82 } 83 sc->acpi_irq_rid = 0; 84 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1); 85 if ((sc->acpi_irq = bus_alloc_resource(sc->acpi_dev, SYS_RES_IRQ, &sc->acpi_irq_rid, 0, ~0, 1, 86 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 87 device_printf(sc->acpi_dev, "could not allocate SCI interrupt\n"); 88 return_ACPI_STATUS(AE_ALREADY_EXISTS); 89 } 90 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC, (driver_intr_t *)InterruptWrapper, 91 Context, &sc->acpi_irq_handle)) { 92 device_printf(sc->acpi_dev, "could not set up SCI interrupt\n"); 93 return_ACPI_STATUS(AE_ALREADY_EXISTS); 94 } 95 96 return_ACPI_STATUS(AE_OK); 97 } 98 99 ACPI_STATUS 100 AcpiOsRemoveInterruptHandler (UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine) 101 { 102 struct acpi_softc *sc; 103 104 ACPI_FUNCTION_TRACE(__func__); 105 106 if ((InterruptNumber < 0) || (InterruptNumber > 255)) 107 return_ACPI_STATUS(AE_BAD_PARAMETER); 108 if (ServiceRoutine == NULL) 109 return_ACPI_STATUS(AE_BAD_PARAMETER); 110 111 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 112 panic("can't find ACPI device to deregister interrupt"); 113 114 if (sc->acpi_irq == NULL) 115 return_ACPI_STATUS(AE_NOT_EXIST); 116 117 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 118 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 119 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 120 121 sc->acpi_irq = NULL; 122 123 return_ACPI_STATUS(AE_OK); 124 } 125 126 /* 127 * Interrupt handler wrapper. 128 */ 129 static void 130 InterruptWrapper(void *arg) 131 { 132 ACPI_LOCK; 133 InterruptHandler(arg); 134 ACPI_UNLOCK; 135 } 136