1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
36 #include <contrib/dev/acpica/include/acpi.h>
37 #include <dev/acpica/acpivar.h>
39 #include <dev/gpio/gpiobusvar.h>
40 #include <dev/gpio/acpi_gpiobusvar.h>
52 	ACPI_HANDLE handle;  member
62 	device_t dev;  member
66 gpio_aei_probe(device_t dev)  in gpio_aei_probe()  argument
79 	if (ctx->type == ACPI_AEI_TYPE_EVT)  in gpio_aei_intr()
80 		acpi_SetInteger(ctx->handle, NULL, ctx->pin);  in gpio_aei_intr()
82 		AcpiEvaluateObject(ctx->handle, NULL, NULL, NULL);  in gpio_aei_intr()
88 	ACPI_RESOURCE_GPIO * gpio_res = &res->Data.Gpio;  in gpio_aei_enumerate()
99 	if (res->Type != ACPI_RESOURCE_TYPE_GPIO)  in gpio_aei_enumerate()
101 	if (gpio_res->ConnectionType != ACPI_RESOURCE_GPIO_TYPE_INT)  in gpio_aei_enumerate()
108 	err = GPIO_PIN_MAX(acpi_get_device(sc->dev_handle), &maxpin);  in gpio_aei_enumerate()
112 	busdev = GPIO_GET_BUS(acpi_get_device(sc->dev_handle));  in gpio_aei_enumerate()
113 	for (int i = 0; i < gpio_res->PinTableLength; i++) {  in gpio_aei_enumerate()
115 		uint32_t pin = gpio_res->PinTable[i];  in gpio_aei_enumerate()
118 			device_printf(sc->dev,  in gpio_aei_enumerate()
125 		ctx->type = ACPI_AEI_TYPE_UNKNOWN;  in gpio_aei_enumerate()
130 			if (ACPI_SUCCESS(AcpiGetHandle(sc->dev_handle, objname,  in gpio_aei_enumerate()
131 			    &ctx->handle)))  in gpio_aei_enumerate()
132 				ctx->type = ACPI_AEI_TYPE_ELX;  in gpio_aei_enumerate()
135 		if (ctx->type == ACPI_AEI_TYPE_UNKNOWN) {  in gpio_aei_enumerate()
136 			if (ACPI_SUCCESS(AcpiGetHandle(sc->dev_handle, "_EVT",  in gpio_aei_enumerate()
137 			    &ctx->handle)))  in gpio_aei_enumerate()
138 				ctx->type = ACPI_AEI_TYPE_EVT;  in gpio_aei_enumerate()
140 				device_printf(sc->dev,  in gpio_aei_enumerate()
149 		err = gpio_pin_get_by_bus_pinnum(busdev, pin, &ctx->gpio);  in gpio_aei_enumerate()
151 			device_printf(sc->dev, "Cannot acquire pin 0x%x\n",  in gpio_aei_enumerate()
158 		err = gpio_pin_setflags(ctx->gpio, flags & ~GPIO_INTR_MASK);  in gpio_aei_enumerate()
160 			device_printf(sc->dev,  in gpio_aei_enumerate()
163 			gpio_pin_release(ctx->gpio);  in gpio_aei_enumerate()
168 		ctx->intr_rid = 0;  in gpio_aei_enumerate()
169 		ctx->intr_res = gpio_alloc_intr_resource(sc->dev,  in gpio_aei_enumerate()
170 		    &ctx->intr_rid, RF_ACTIVE, ctx->gpio,  in gpio_aei_enumerate()
172 		if (ctx->intr_res == NULL) {  in gpio_aei_enumerate()
173 			device_printf(sc->dev,  in gpio_aei_enumerate()
176 			gpio_pin_release(ctx->gpio);  in gpio_aei_enumerate()
181 		err = bus_setup_intr(sc->dev, ctx->intr_res, INTR_TYPE_MISC |  in gpio_aei_enumerate()
183 		    gpio_aei_intr, ctx, &ctx->intr_cookie);  in gpio_aei_enumerate()
185 			device_printf(sc->dev,  in gpio_aei_enumerate()
188 			bus_release_resource(sc->dev, ctx->intr_res);  in gpio_aei_enumerate()
189 			gpio_pin_release(ctx->gpio);  in gpio_aei_enumerate()
194 		ctx->pin = pin;  in gpio_aei_enumerate()
195 		SLIST_INSERT_HEAD(&sc->aei_ctx, ctx, next);  in gpio_aei_enumerate()
202 gpio_aei_attach(device_t dev)  in gpio_aei_attach()  argument
204 	struct gpio_aei_softc * sc = device_get_softc(dev);  in gpio_aei_attach()
205 	ACPI_HANDLE handle;  in gpio_aei_attach()  local
209 	device_set_desc(dev, "ACPI Event Information Device");  in gpio_aei_attach()
211 	handle = acpi_gpiobus_get_handle(dev);  in gpio_aei_attach()
212 	status = AcpiGetParent(handle, &sc->dev_handle);  in gpio_aei_attach()
214 		device_printf(dev, "Cannot get parent of %s\n",  in gpio_aei_attach()
215 		    acpi_name(handle));  in gpio_aei_attach()
219 	SLIST_INIT(&sc->aei_ctx);  in gpio_aei_attach()
220 	sc->dev = dev;  in gpio_aei_attach()
222 	status = AcpiWalkResources(sc->dev_handle, "_AEI",  in gpio_aei_attach()
225 		device_printf(dev, "Failed to enumerate AEI resources\n");  in gpio_aei_attach()
233 gpio_aei_detach(device_t dev)  in gpio_aei_detach()  argument
235 	struct gpio_aei_softc * sc = device_get_softc(dev);  in gpio_aei_detach()
238 	SLIST_FOREACH_SAFE(ctx, &sc->aei_ctx, next, tctx) {  in gpio_aei_detach()
239 		bus_teardown_intr(dev, ctx->intr_res, ctx->intr_cookie);  in gpio_aei_detach()
240 		bus_release_resource(dev, ctx->intr_res);  in gpio_aei_detach()
241 		gpio_pin_release(ctx->gpio);  in gpio_aei_detach()