acpi_event.c revision 1.1.6.2
1 /* $NetBSD: acpi_event.c,v 1.1.6.2 2019/06/10 22:07:05 christos 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_event.c,v 1.1.6.2 2019/06/10 22:07:05 christos Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/kmem.h> 39 40 #include <dev/acpi/acpireg.h> 41 #include <dev/acpi/acpivar.h> 42 #include <dev/acpi/acpi_event.h> 43 44 struct acpi_event { 45 device_t ev_dev; 46 ACPI_HANDLE ev_method; 47 bool ev_method_evt; 48 UINT16 ev_data; 49 }; 50 51 struct acpi_event_gpio_context { 52 device_t ctx_dev; 53 ACPI_HANDLE ctx_handle; 54 void (*ctx_func)(void *, struct acpi_event *, ACPI_RESOURCE_GPIO *); 55 void *ctx_arg; 56 }; 57 58 static ACPI_STATUS 59 acpi_event_create(device_t dev, ACPI_HANDLE handle, UINT16 data, UINT8 trig, struct acpi_event **pev) 60 { 61 struct acpi_event *ev; 62 char namebuf[5]; 63 64 const char trigchar = trig == ACPI_LEVEL_SENSITIVE ? 'L' : 'E'; 65 66 ev = kmem_alloc(sizeof(*ev), KM_SLEEP); 67 ev->ev_dev = dev; 68 ev->ev_method = NULL; 69 ev->ev_method_evt = false; 70 ev->ev_data = data; 71 72 if (data <= 255) { 73 snprintf(namebuf, sizeof(namebuf), "_%c%02X", trigchar, data); 74 AcpiGetHandle(handle, namebuf, &ev->ev_method); 75 } 76 if (ev->ev_method == NULL && ACPI_SUCCESS(AcpiGetHandle(handle, "_EVT", &ev->ev_method))) 77 ev->ev_method_evt = true; 78 79 if (ev->ev_method == NULL) { 80 aprint_error_dev(dev, "%s is missing a control method for event %#x (trig %c)\n", 81 acpi_name(handle), data, trigchar); 82 kmem_free(ev, sizeof(*ev)); 83 return AE_NOT_FOUND; 84 } 85 86 *pev = ev; 87 88 return AE_OK; 89 } 90 91 static ACPI_STATUS 92 acpi_event_gpio_resource_cb(ACPI_RESOURCE *res, void *priv) 93 { 94 struct acpi_event_gpio_context *ctx = priv; 95 struct acpi_event *ev; 96 ACPI_RESOURCE_GPIO *gpio; 97 ACPI_STATUS rv; 98 99 if (res->Type != ACPI_RESOURCE_TYPE_GPIO) 100 return AE_OK; 101 102 gpio = &res->Data.Gpio; 103 if (gpio->ConnectionType != ACPI_RESOURCE_GPIO_TYPE_INT) 104 return AE_OK; 105 if (gpio->PinTableLength != 1) 106 return AE_OK; 107 108 rv = acpi_event_create(ctx->ctx_dev, ctx->ctx_handle, gpio->PinTable[0], gpio->Triggering, &ev); 109 if (ACPI_SUCCESS(rv)) 110 ctx->ctx_func(ctx->ctx_arg, ev, gpio); 111 112 return AE_OK; 113 } 114 115 ACPI_STATUS 116 acpi_event_create_gpio(device_t dev, ACPI_HANDLE handle, 117 void (*func)(void *, struct acpi_event *, ACPI_RESOURCE_GPIO *), void *arg) 118 { 119 struct acpi_event_gpio_context ctx; 120 121 ctx.ctx_dev = dev; 122 ctx.ctx_handle = handle; 123 ctx.ctx_func = func; 124 ctx.ctx_arg = arg; 125 126 return AcpiWalkResources(handle, "_AEI", acpi_event_gpio_resource_cb, &ctx); 127 } 128 129 ACPI_STATUS 130 acpi_event_create_int(device_t dev, ACPI_HANDLE handle, 131 void (*func)(void *, struct acpi_event *, struct acpi_irq *), void *arg) 132 { 133 struct acpi_resources res; 134 struct acpi_event *ev; 135 struct acpi_irq *irq; 136 ACPI_STATUS rv; 137 int n; 138 139 rv = acpi_resource_parse(dev, handle, "_CRS", &res, 140 &acpi_resource_parse_ops_default); 141 if (ACPI_FAILURE(rv)) 142 return rv; 143 144 for (n = 0; (irq = acpi_res_irq(&res, n)) != NULL; n++) { 145 rv = acpi_event_create(dev, handle, irq->ar_irq, irq->ar_type, &ev); 146 if (ACPI_SUCCESS(rv)) 147 func(arg, ev, irq); 148 } 149 150 acpi_resource_cleanup(&res); 151 152 return AE_OK; 153 } 154 155 static void 156 acpi_event_invoke(void *priv) 157 { 158 struct acpi_event * const ev = priv; 159 ACPI_OBJECT_LIST objs, *arg = NULL; 160 ACPI_OBJECT obj[1]; 161 ACPI_STATUS rv; 162 163 if (ev->ev_method_evt) { 164 objs.Count = 1; 165 objs.Pointer = obj; 166 obj[0].Type = ACPI_TYPE_INTEGER; 167 obj[0].Integer.Value = ev->ev_data; 168 arg = &objs; 169 } 170 171 rv = AcpiEvaluateObject(ev->ev_method, NULL, arg, NULL); 172 if (ACPI_FAILURE(rv)) 173 device_printf(ev->ev_dev, "failed to handle %s event: %s\n", 174 acpi_name(ev->ev_method), AcpiFormatException(rv)); 175 } 176 177 ACPI_STATUS 178 acpi_event_notify(struct acpi_event *ev) 179 { 180 return AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_event_invoke, ev); 181 } 182
Indexes created Thu Oct 02 14:10:14 GMT 2025