1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
34 #include <contrib/dev/acpica/include/acpi.h>
35 #include <dev/acpica/acpivar.h>
37 #include <dev/gpio/gpiobusvar.h>
38 #include <dev/gpio/acpi_gpiobusvar.h>
55 	ACPI_HANDLE		dev_handle;	/* ACPI handle for bus */
65 	if (gpio_res->ConnectionType == ACPI_RESOURCE_GPIO_TYPE_INT) {  in acpi_gpiobus_convflags()
66 		switch (gpio_res->Polarity) {  in acpi_gpiobus_convflags()
68 			flags = gpio_res->Triggering == ACPI_LEVEL_SENSITIVE ?  in acpi_gpiobus_convflags()
72 			flags = gpio_res->Triggering == ACPI_LEVEL_SENSITIVE ?  in acpi_gpiobus_convflags()
83 		if (gpio_res->Shareable == ACPI_SHARED)  in acpi_gpiobus_convflags()
87 	if (gpio_res->ConnectionType == ACPI_RESOURCE_GPIO_TYPE_IO) {  in acpi_gpiobus_convflags()
88 		switch (gpio_res->IoRestriction) {  in acpi_gpiobus_convflags()
98 	switch (gpio_res->PinConfig) {  in acpi_gpiobus_convflags()
113 	ACPI_RESOURCE_GPIO *gpio_res = &res->Data.Gpio;  in acpi_gpiobus_enumerate_res()
115 	struct gpiobus_softc *super_sc = ctx->sc;  in acpi_gpiobus_enumerate_res()
116 	ACPI_HANDLE handle;  in acpi_gpiobus_enumerate_res()  local
119 	if (res->Type != ACPI_RESOURCE_TYPE_GPIO)  in acpi_gpiobus_enumerate_res()
123 	    gpio_res->ResourceSource.StringPtr, &handle)) ||  in acpi_gpiobus_enumerate_res()
124 	    handle != ctx->dev_handle)  in acpi_gpiobus_enumerate_res()
127 	if (__predict_false(gpio_res->PinTableLength > super_sc->sc_npins)) {  in acpi_gpiobus_enumerate_res()
128 		device_printf(super_sc->sc_busdev,  in acpi_gpiobus_enumerate_res()
130 		    gpio_res->PinTableLength, super_sc->sc_npins);  in acpi_gpiobus_enumerate_res()
135 	for (i = 0; i < gpio_res->PinTableLength; i++) {  in acpi_gpiobus_enumerate_res()
136 		UINT16 pin = gpio_res->PinTable[i];  in acpi_gpiobus_enumerate_res()
138 		if (__predict_false(pin >= super_sc->sc_npins)) {  in acpi_gpiobus_enumerate_res()
139 			device_printf(super_sc->sc_busdev,  in acpi_gpiobus_enumerate_res()
141 			    pin, super_sc->sc_npins - 1);  in acpi_gpiobus_enumerate_res()
145 		GPIO_PIN_SETFLAGS(super_sc->sc_dev, pin, flags &  in acpi_gpiobus_enumerate_res()
161 	resource_list_init(&devi->gpiobus.rl);  in acpi_gpiobus_setup_devinfo()
163 	devi->flags = acpi_gpiobus_convflags(gpio_res);  in acpi_gpiobus_setup_devinfo()
165 		devi->flags &= ~GPIO_PIN_PULLUP;  in acpi_gpiobus_setup_devinfo()
167 	devi->gpiobus.npins = 1;  in acpi_gpiobus_setup_devinfo()
168 	if (gpiobus_alloc_ivars(&devi->gpiobus) != 0) {  in acpi_gpiobus_setup_devinfo()
173 	for (int i = 0; i < devi->gpiobus.npins; i++)  in acpi_gpiobus_setup_devinfo()
174 		devi->gpiobus.pins[i] = gpio_res->PinTable[i];  in acpi_gpiobus_setup_devinfo()
182 	ACPI_RESOURCE_GPIO *gpio_res = &res->Data.Gpio;  in acpi_gpiobus_enumerate_aei()
184 	device_t bus = ctx->sc->sc_busdev;  in acpi_gpiobus_enumerate_aei()
189 	if (res->Type != ACPI_RESOURCE_TYPE_GPIO)  in acpi_gpiobus_enumerate_aei()
191 	if (gpio_res->ConnectionType != ACPI_RESOURCE_GPIO_TYPE_INT)  in acpi_gpiobus_enumerate_aei()
205 	for (int i = 0; i < devi->gpiobus.npins; i++) {  in acpi_gpiobus_enumerate_aei()
206 		if (GPIOBUS_PIN_SETFLAGS(bus, child, 0, devi->flags)) {  in acpi_gpiobus_enumerate_aei()
213 	devi->dev_handle = ctx->dev_handle;  in acpi_gpiobus_enumerate_aei()
219 acpi_gpiobus_enumerate(ACPI_HANDLE handle, UINT32 depth, void *context,  in acpi_gpiobus_enumerate()  argument
228 	if (!ACPI_FAILURE(acpi_GetInteger(handle, "_STA", &sta)) &&  in acpi_gpiobus_enumerate()
232 	if (!acpi_has_hid(handle))  in acpi_gpiobus_enumerate()
236 	AcpiWalkResources(handle, "_CRS", acpi_gpiobus_enumerate_res, context);  in acpi_gpiobus_enumerate()
251 	status = AcpiBufferToResource(info->Connection, info->Length, &res);  in acpi_gpiobus_space_handler()
252 	if (ACPI_FAILURE(status) || res->Type != ACPI_RESOURCE_TYPE_GPIO)  in acpi_gpiobus_space_handler()
255 	gpio_res = &res->Data.Gpio;  in acpi_gpiobus_space_handler()
257 	    handler_info)->super_sc.sc_dev;  in acpi_gpiobus_space_handler()
262 		    gpio_res->IoRestriction == ACPI_IO_RESTRICT_INPUT))  in acpi_gpiobus_space_handler()
267 			    gpio_res->PinTable[address + i], (*value & 1 << i) ?  in acpi_gpiobus_space_handler()
273 		    gpio_res->IoRestriction == ACPI_IO_RESTRICT_OUTPUT))  in acpi_gpiobus_space_handler()
280 			    gpio_res->PinTable[address + i], &v) != 0)  in acpi_gpiobus_space_handler()
298 acpi_gpiobus_probe(device_t dev)  in acpi_gpiobus_probe()  argument
305 	controller = device_get_parent(dev);  in acpi_gpiobus_probe()
312 	device_set_desc(dev, "GPIO bus (ACPI-hinted)");  in acpi_gpiobus_probe()
317 acpi_gpiobus_attach(device_t dev)  in acpi_gpiobus_attach()  argument
321 	ACPI_HANDLE handle;  in acpi_gpiobus_attach()  local
325 	if ((err = gpiobus_attach(dev)) != 0)  in acpi_gpiobus_attach()
328 	sc = device_get_softc(dev);  in acpi_gpiobus_attach()
329 	handle = acpi_get_handle(sc->super_sc.sc_dev);  in acpi_gpiobus_attach()
330 	if (handle == NULL) {  in acpi_gpiobus_attach()
331 		gpiobus_detach(dev);  in acpi_gpiobus_attach()
335 	status = AcpiInstallAddressSpaceHandler(handle, ACPI_ADR_SPACE_GPIO,  in acpi_gpiobus_attach()
336 	    acpi_gpiobus_space_handler, NULL, &sc->handler_info);  in acpi_gpiobus_attach()
339 		device_printf(dev,  in acpi_gpiobus_attach()
341 		gpiobus_detach(dev);  in acpi_gpiobus_attach()
345 	ctx.dev_handle = handle;  in acpi_gpiobus_attach()
346 	ctx.sc = &sc->super_sc;  in acpi_gpiobus_attach()
352 		device_printf(dev, "Failed to enumerate GPIO resources\n");  in acpi_gpiobus_attach()
355 	status = AcpiWalkResources(handle, "_AEI", acpi_gpiobus_enumerate_aei,  in acpi_gpiobus_attach()
359 		device_printf(dev, "Failed to enumerate GPIO resources\n");  in acpi_gpiobus_attach()
365 acpi_gpiobus_detach(device_t dev)  in acpi_gpiobus_detach()  argument
370 	super_sc = device_get_softc(dev);  in acpi_gpiobus_detach()
372 	    acpi_get_handle(super_sc->sc_dev), ACPI_ADR_SPACE_GPIO,  in acpi_gpiobus_detach()
377 		device_printf(dev,  in acpi_gpiobus_detach()
380 	return (gpiobus_detach(dev));  in acpi_gpiobus_detach()
395 	(*out_pin)->flags = devi->flags;  in gpio_pin_get_by_acpi_index()
401 acpi_gpiobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)  in acpi_gpiobus_read_ivar()  argument
407 		*result = (uintptr_t)devi->dev_handle;  in acpi_gpiobus_read_ivar()
410 		return (gpiobus_read_ivar(dev, child, which, result));  in acpi_gpiobus_read_ivar()