Home | History | Annotate | Line # | Download | only in acpi 
      1 /* $NetBSD: acpi_ged.c,v 1.4 2022/01/11 10:53:08 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 (at) 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 1.4 2022/01/11 10:53:08 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 #include <dev/acpi/acpi_intr.h>
     46 
     47 static int	acpi_ged_match(device_t, cfdata_t, void *);
     48 static void	acpi_ged_attach(device_t, device_t, void *);
     49 
     50 static void	acpi_ged_register_event(void *, struct acpi_event *, struct acpi_irq *);
     51 static int	acpi_ged_intr(void *);
     52 
     53 CFATTACH_DECL_NEW(acpiged, 0, acpi_ged_match, acpi_ged_attach, NULL, NULL);
     54 
     55 static const struct device_compatible_entry compat_data[] = {
     56 	{ .compat = "ACPI0013" },
     57 	DEVICE_COMPAT_EOL
     58 };
     59 
     60 static int
     61 acpi_ged_match(device_t parent, cfdata_t cf, void *aux)
     62 {
     63 	struct acpi_attach_args *aa = aux;
     64 
     65 	return acpi_compatible_match(aa, compat_data);
     66 }
     67 
     68 static void
     69 acpi_ged_attach(device_t parent, device_t self, void *aux)
     70 {
     71 	struct acpi_attach_args * const aa = aux;
     72 	ACPI_HANDLE handle = aa->aa_node->ad_handle;
     73 
     74         if (ACPI_FAILURE(acpi_event_create_int(self, handle, acpi_ged_register_event, self)))
     75                 aprint_error_dev(self, "failed to create events\n");
     76 }
     77 
     78 static void
     79 acpi_ged_register_event(void *priv, struct acpi_event *ev, struct acpi_irq *irq)
     80 {
     81 	device_t dev = priv;
     82 	void *ih;
     83 
     84 	ih = acpi_intr_establish_irq(dev, irq, IPL_VM, true,
     85 	    acpi_ged_intr, ev, device_xname(dev));
     86 	if (ih == NULL) {
     87 		aprint_error_dev(dev, "couldn't establish interrupt (irq %d)\n", irq->ar_irq);
     88 		return;
     89 	}
     90 	acpi_event_set_intrcookie(ev, ih);
     91 }
     92 
     93 static int
     94 acpi_ged_intr(void *priv)
     95 {
     96 	struct acpi_event * const ev = priv;
     97 
     98 	acpi_event_notify(ev);
     99 
    100 	return 1;
    101 }
    102