1 /* $NetBSD: acpi_ged.c,v 1.1 2018/10/22 22:36:19 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill@invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: acpi_ged.c,v 1.1 2018/10/22 22:36:19 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 #include <sys/intr.h> 40 #include <sys/kmem.h> 41 42 #include <dev/acpi/acpireg.h> 43 #include <dev/acpi/acpivar.h> 44 #include <dev/acpi/acpi_event.h> 45 46 static int acpi_ged_match(device_t, cfdata_t, void *); 47 static void acpi_ged_attach(device_t, device_t, void *); 48 49 static void acpi_ged_register_event(void *, struct acpi_event *, struct acpi_irq *); 50 static int acpi_ged_intr(void *); 51 52 CFATTACH_DECL_NEW(acpiged, 0, acpi_ged_match, acpi_ged_attach, NULL, NULL); 53 54 static const char * const compatible[] = { 55 "ACPI0013", 56 NULL 57 }; 58 59 static int 60 acpi_ged_match(device_t parent, cfdata_t cf, void *aux) 61 { 62 struct acpi_attach_args *aa = aux; 63 64 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 65 return 0; 66 67 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible); 68 } 69 70 static void 71 acpi_ged_attach(device_t parent, device_t self, void *aux) 72 { 73 struct acpi_attach_args * const aa = aux; 74 ACPI_HANDLE handle = aa->aa_node->ad_handle; 75 76 if (ACPI_FAILURE(acpi_event_create_int(self, handle, acpi_ged_register_event, self))) 77 aprint_error_dev(self, "failed to create events\n"); 78 } 79 80 static void 81 acpi_ged_register_event(void *priv, struct acpi_event *ev, struct acpi_irq *irq) 82 { 83 device_t dev = priv; 84 void *ih; 85 86 const int type = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL; 87 ih = intr_establish(irq->ar_irq, IPL_VM, type, acpi_ged_intr, ev); 88 if (ih == NULL) { 89 aprint_error_dev(dev, "couldn't establish interrupt (irq %d)\n", irq->ar_irq); 90 return; 91 } 92 } 93 94 static int 95 acpi_ged_intr(void *priv) 96 { 97 struct acpi_event * const ev = priv; 98 99 acpi_event_notify(ev); 100 101 return 1; 102 } 103