1 /*-
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27  * Support routines usable by any SoC sdhci bridge driver that uses gpio pins
33 #include <sys/gpio.h>
38 #include <dev/gpio/gpiobusvar.h>
65 	struct sdhci_fdt_gpio *gpio = arg;  in cd_intr()  local
67 	sdhci_handle_card_present(gpio->slot, sdhci_fdt_gpio_get_present(gpio));  in cd_intr()
74 cd_setup(struct sdhci_fdt_gpio *gpio, phandle_t node)  in cd_setup()  argument
80 	dev = gpio->dev;  in cd_setup()
83 	 * If the device is flagged as non-removable, set that slot option, and  in cd_setup()
84 	 * set a flag to make sdhci_fdt_gpio_get_present() always return true.  in cd_setup()
86 	if (OF_hasprop(node, "non-removable")) {  in cd_setup()
87 		gpio->slot->opt |= SDHCI_NON_REMOVABLE;  in cd_setup()
88 		gpio->cd_disabled = true;  in cd_setup()
90 			device_printf(dev, "Non-removable media\n");  in cd_setup()
95 	 * If there is no cd-gpios property, then presumably the hardware  in cd_setup()
100 	 * If there is a property, make sure we can read the pin.  in cd_setup()
102 	if (gpio_pin_get_by_ofw_property(dev, node, "cd-gpios", &gpio->cd_pin))  in cd_setup()
105 	if (gpio_pin_getcaps(gpio->cd_pin, &pincaps) != 0 ||  in cd_setup()
107 		device_printf(dev, "Cannot read card-detect gpio pin; "  in cd_setup()
108 		    "setting card-always-present flag.\n");  in cd_setup()
109 		gpio->cd_disabled = true;  in cd_setup()
113 	if (OF_hasprop(node, "cd-inverted"))  in cd_setup()
114 		gpio->cd_inverted = true;  in cd_setup()
131 	if ((gpio->cd_ires = gpio_alloc_intr_resource(dev, &gpio->cd_irid,  in cd_setup()
132 	    RF_ACTIVE, gpio->cd_pin, GPIO_INTR_EDGE_BOTH)) == NULL) {  in cd_setup()
135 			    "detect GPIO\n");  in cd_setup()
139 	if (bus_setup_intr(dev, gpio->cd_ires, INTR_TYPE_BIO | INTR_MPSAFE,  in cd_setup()
140 	    NULL, cd_intr, gpio, &gpio->cd_ihandler) != 0) {  in cd_setup()
141 		device_printf(dev, "Unable to setup card-detect irq handler\n");  in cd_setup()
142 		gpio->cd_ihandler = NULL;  in cd_setup()
149 	 * If we have a readable gpio pin, but didn't successfully configure  in cd_setup()
150 	 * gpio interrupts, ask the sdhci driver to poll from a callout.  in cd_setup()
152 	if (gpio->cd_ihandler == NULL) {  in cd_setup()
154 		gpio->slot->quirks |= SDHCI_QUIRK_POLL_CARD_PRESENT;  in cd_setup()
162 		    device_get_nameunit(gpio->cd_pin->dev), gpio->cd_pin->pin,  in cd_setup()
171 wp_setup(struct sdhci_fdt_gpio *gpio, phandle_t node)  in wp_setup()  argument
175 	dev = gpio->dev;  in wp_setup()
177 	if (OF_hasprop(node, "wp-disable")) {  in wp_setup()
178 		gpio->wp_disabled = true;  in wp_setup()
184 	if (gpio_pin_get_by_ofw_property(dev, node, "wp-gpios", &gpio->wp_pin))  in wp_setup()
187 	if (OF_hasprop(node, "wp-inverted"))  in wp_setup()
188 		gpio->wp_inverted = true;  in wp_setup()
192 		    device_get_nameunit(gpio->wp_pin->dev), gpio->wp_pin->pin);  in wp_setup()
199 	struct sdhci_fdt_gpio *gpio;  in sdhci_fdt_gpio_setup()  local
201 	gpio = malloc(sizeof(*gpio), M_DEVBUF, M_ZERO | M_WAITOK);  in sdhci_fdt_gpio_setup()
202 	gpio->dev  = dev;  in sdhci_fdt_gpio_setup()
203 	gpio->slot = slot;  in sdhci_fdt_gpio_setup()
207 	wp_setup(gpio, node);  in sdhci_fdt_gpio_setup()
208 	cd_setup(gpio, node);  in sdhci_fdt_gpio_setup()
210 	return (gpio);  in sdhci_fdt_gpio_setup()
214 sdhci_fdt_gpio_teardown(struct sdhci_fdt_gpio *gpio)  in sdhci_fdt_gpio_teardown()  argument
217 	if (gpio == NULL)  in sdhci_fdt_gpio_teardown()
220 	if (gpio->cd_ihandler != NULL)  in sdhci_fdt_gpio_teardown()
221 		bus_teardown_intr(gpio->dev, gpio->cd_ires, gpio->cd_ihandler);  in sdhci_fdt_gpio_teardown()
222 	if (gpio->wp_pin != NULL)  in sdhci_fdt_gpio_teardown()
223 		gpio_pin_release(gpio->wp_pin);  in sdhci_fdt_gpio_teardown()
224 	if (gpio->cd_pin != NULL)  in sdhci_fdt_gpio_teardown()
225 		gpio_pin_release(gpio->cd_pin);  in sdhci_fdt_gpio_teardown()
226 	if (gpio->cd_ires != NULL)  in sdhci_fdt_gpio_teardown()
227 		bus_release_resource(gpio->dev, SYS_RES_IRQ, 0, gpio->cd_ires);  in sdhci_fdt_gpio_teardown()
229 	free(gpio, M_DEVBUF);  in sdhci_fdt_gpio_teardown()
233 sdhci_fdt_gpio_get_present(struct sdhci_fdt_gpio *gpio)  in sdhci_fdt_gpio_get_present()  argument
237 	if (gpio->cd_disabled)  in sdhci_fdt_gpio_get_present()
240 	if (gpio->cd_pin == NULL)  in sdhci_fdt_gpio_get_present()
241 		return (sdhci_generic_get_card_present(gpio->slot->bus,  in sdhci_fdt_gpio_get_present()
242 		    gpio->slot));  in sdhci_fdt_gpio_get_present()
244 	gpio_pin_is_active(gpio->cd_pin, &pinstate);  in sdhci_fdt_gpio_get_present()
246 	return (pinstate ^ gpio->cd_inverted);  in sdhci_fdt_gpio_get_present()
250 sdhci_fdt_gpio_get_readonly(struct sdhci_fdt_gpio *gpio)  in sdhci_fdt_gpio_get_readonly()  argument
254 	if (gpio->wp_disabled)  in sdhci_fdt_gpio_get_readonly()
257 	if (gpio->wp_pin == NULL)  in sdhci_fdt_gpio_get_readonly()
258 		return (sdhci_generic_get_ro(gpio->slot->bus, gpio->slot->dev));  in sdhci_fdt_gpio_get_readonly()
260 	gpio_pin_is_active(gpio->wp_pin, &pinstate);  in sdhci_fdt_gpio_get_readonly()
262 	return (pinstate ^ gpio->wp_inverted);  in sdhci_fdt_gpio_get_readonly()