1 /* $NetBSD: acpi_event.c,v 1.2 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_event.c,v 1.2 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/kmem.h> 39 40 #include <dev/acpi/acpireg.h> 41 #include <dev/acpi/acpivar.h> 42 #include <dev/acpi/acpi_event.h> 43 #include <dev/acpi/acpi_intr.h> 44 45 struct acpi_event { 46 device_t ev_dev; 47 ACPI_HANDLE ev_method; 48 bool ev_method_evt; 49 UINT16 ev_data; 50 void *ev_intrcookie; 51 }; 52 53 struct acpi_event_gpio_context { 54 device_t ctx_dev; 55 ACPI_HANDLE ctx_handle; 56 void (*ctx_func)(void *, struct acpi_event *, ACPI_RESOURCE_GPIO *); 57 void *ctx_arg; 58 }; 59 60 static ACPI_STATUS 61 acpi_event_create(device_t dev, ACPI_HANDLE handle, UINT16 data, UINT8 trig, struct acpi_event **pev) 62 { 63 struct acpi_event *ev; 64 char namebuf[5]; 65 66 const char trigchar = trig == ACPI_LEVEL_SENSITIVE ? 'L' : 'E'; 67 68 ev = kmem_alloc(sizeof(*ev), KM_SLEEP); 69 ev->ev_dev = dev; 70 ev->ev_method = NULL; 71 ev->ev_method_evt = false; 72 ev->ev_data = data; 73 ev->ev_intrcookie = NULL; 74 75 if (data <= 255) { 76 snprintf(namebuf, sizeof(namebuf), "_%c%02X", trigchar, data); 77 AcpiGetHandle(handle, namebuf, &ev->ev_method); 78 } 79 if (ev->ev_method == NULL && ACPI_SUCCESS(AcpiGetHandle(handle, "_EVT", &ev->ev_method))) 80 ev->ev_method_evt = true; 81 82 if (ev->ev_method == NULL) { 83 aprint_error_dev(dev, "%s is missing a control method for event %#x (trig %c)\n", 84 acpi_name(handle), data, trigchar); 85 kmem_free(ev, sizeof(*ev)); 86 return AE_NOT_FOUND; 87 } 88 89 *pev = ev; 90 91 return AE_OK; 92 } 93 94 static ACPI_STATUS 95 acpi_event_gpio_resource_cb(ACPI_RESOURCE *res, void *priv) 96 { 97 struct acpi_event_gpio_context *ctx = priv; 98 struct acpi_event *ev; 99 ACPI_RESOURCE_GPIO *gpio; 100 ACPI_STATUS rv; 101 102 if (res->Type != ACPI_RESOURCE_TYPE_GPIO) 103 return AE_OK; 104 105 gpio = &res->Data.Gpio; 106 if (gpio->ConnectionType != ACPI_RESOURCE_GPIO_TYPE_INT) 107 return AE_OK; 108 if (gpio->PinTableLength != 1) 109 return AE_OK; 110 111 rv = acpi_event_create(ctx->ctx_dev, ctx->ctx_handle, gpio->PinTable[0], gpio->Triggering, &ev); 112 if (ACPI_SUCCESS(rv)) 113 ctx->ctx_func(ctx->ctx_arg, ev, gpio); 114 115 return AE_OK; 116 } 117 118 ACPI_STATUS 119 acpi_event_create_gpio(device_t dev, ACPI_HANDLE handle, 120 void (*func)(void *, struct acpi_event *, ACPI_RESOURCE_GPIO *), void *arg) 121 { 122 struct acpi_event_gpio_context ctx; 123 124 ctx.ctx_dev = dev; 125 ctx.ctx_handle = handle; 126 ctx.ctx_func = func; 127 ctx.ctx_arg = arg; 128 129 return AcpiWalkResources(handle, "_AEI", acpi_event_gpio_resource_cb, &ctx); 130 } 131 132 ACPI_STATUS 133 acpi_event_create_int(device_t dev, ACPI_HANDLE handle, 134 void (*func)(void *, struct acpi_event *, struct acpi_irq *), void *arg) 135 { 136 struct acpi_resources res; 137 struct acpi_event *ev; 138 struct acpi_irq *irq; 139 ACPI_STATUS rv; 140 int n; 141 142 rv = acpi_resource_parse(dev, handle, "_CRS", &res, 143 &acpi_resource_parse_ops_default); 144 if (ACPI_FAILURE(rv)) 145 return rv; 146 147 for (n = 0; (irq = acpi_res_irq(&res, n)) != NULL; n++) { 148 rv = acpi_event_create(dev, handle, irq->ar_irq, irq->ar_type, &ev); 149 if (ACPI_SUCCESS(rv)) 150 func(arg, ev, irq); 151 } 152 153 acpi_resource_cleanup(&res); 154 155 return AE_OK; 156 } 157 158 static void 159 acpi_event_invoke(void *priv) 160 { 161 struct acpi_event * const ev = priv; 162 ACPI_OBJECT_LIST objs, *arg = NULL; 163 ACPI_OBJECT obj[1]; 164 ACPI_STATUS rv; 165 166 if (ev->ev_method_evt) { 167 objs.Count = 1; 168 objs.Pointer = obj; 169 obj[0].Type = ACPI_TYPE_INTEGER; 170 obj[0].Integer.Value = ev->ev_data; 171 arg = &objs; 172 } 173 174 rv = AcpiEvaluateObject(ev->ev_method, NULL, arg, NULL); 175 if (ACPI_FAILURE(rv)) { 176 device_printf(ev->ev_dev, "failed to handle %s event: %s\n", 177 acpi_name(ev->ev_method), AcpiFormatException(rv)); 178 } 179 180 if (ev->ev_intrcookie != NULL) { 181 acpi_intr_unmask(ev->ev_intrcookie); 182 } 183 } 184 185 ACPI_STATUS 186 acpi_event_notify(struct acpi_event *ev) 187 { 188 if (ev->ev_intrcookie != NULL) { 189 acpi_intr_mask(ev->ev_intrcookie); 190 } 191 192 return AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_event_invoke, ev); 193 } 194 195 void 196 acpi_event_set_intrcookie(struct acpi_event *ev, void *intrcookie) 197 { 198 KASSERT(ev->ev_intrcookie == NULL); 199 200 ev->ev_intrcookie = intrcookie; 201 } 202
Indexes created Sat Sep 20 22:09:52 GMT 2025