2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
40 #include <sys/mutex.h>
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45 #include <machine/intr.h>
47 #include <dev/gpio/gpiobusvar.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
50 #include <dev/extres/clk/clk.h>
54 #include "fdt_pinctrl_if.h"
56 #define RK_GPIO_SWPORTA_DR 0x00 /* Data register */
57 #define RK_GPIO_SWPORTA_DDR 0x04 /* Data direction register */
59 #define RK_GPIO_INTEN 0x30 /* Interrupt enable register */
60 #define RK_GPIO_INTMASK 0x34 /* Interrupt mask register */
61 #define RK_GPIO_INTTYPE_LEVEL 0x38 /* Interrupt level register */
62 #define RK_GPIO_INT_POLARITY 0x3C /* Interrupt polarity register */
63 #define RK_GPIO_INT_STATUS 0x40 /* Interrupt status register */
64 #define RK_GPIO_INT_RAWSTATUS 0x44 /* Raw Interrupt status register */
66 #define RK_GPIO_DEBOUNCE 0x48 /* Debounce enable register */
68 #define RK_GPIO_PORTA_EOI 0x4C /* Clear interrupt register */
69 #define RK_GPIO_EXT_PORTA 0x50 /* External port register */
71 #define RK_GPIO_LS_SYNC 0x60 /* Level sensitive syncronization enable register */
73 #define RK_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
74 GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN)
76 #define GPIO_FLAGS_PINCTRL GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN
77 #define RK_GPIO_MAX_PINS 32
84 struct rk_gpio_softc {
88 struct resource *sc_res[2];
89 bus_space_tag_t sc_bst;
90 bus_space_handle_t sc_bsh;
95 struct pin_cached pin_cached[RK_GPIO_MAX_PINS];
98 static struct ofw_compat_data compat_data[] = {
99 {"rockchip,gpio-bank", 1},
103 static struct resource_spec rk_gpio_spec[] = {
104 { SYS_RES_MEMORY, 0, RF_ACTIVE },
105 { SYS_RES_IRQ, 0, RF_ACTIVE },
109 static int rk_gpio_detach(device_t dev);
111 #define RK_GPIO_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx)
112 #define RK_GPIO_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->sc_mtx)
113 #define RK_GPIO_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
115 #define RK_GPIO_WRITE(_sc, _off, _val) \
116 bus_space_write_4(_sc->sc_bst, _sc->sc_bsh, _off, _val)
117 #define RK_GPIO_READ(_sc, _off) \
118 bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off)
121 rk_gpio_probe(device_t dev)
124 if (!ofw_bus_status_okay(dev))
127 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
130 device_set_desc(dev, "RockChip GPIO Bank controller");
131 return (BUS_PROBE_DEFAULT);
135 rk_gpio_attach(device_t dev)
137 struct rk_gpio_softc *sc;
141 sc = device_get_softc(dev);
143 sc->pinctrl = device_get_parent(dev);
145 node = ofw_bus_get_node(sc->sc_dev);
146 if (!OF_hasprop(node, "gpio-controller"))
149 mtx_init(&sc->sc_mtx, "rk gpio", "gpio", MTX_SPIN);
151 if (bus_alloc_resources(dev, rk_gpio_spec, sc->sc_res)) {
152 device_printf(dev, "could not allocate resources\n");
153 bus_release_resources(dev, rk_gpio_spec, sc->sc_res);
154 mtx_destroy(&sc->sc_mtx);
158 sc->sc_bst = rman_get_bustag(sc->sc_res[0]);
159 sc->sc_bsh = rman_get_bushandle(sc->sc_res[0]);
161 if (clk_get_by_ofw_index(dev, 0, 0, &sc->clk) != 0) {
162 device_printf(dev, "Cannot get clock\n");
166 err = clk_enable(sc->clk);
168 device_printf(dev, "Could not enable clock %s\n",
169 clk_get_name(sc->clk));
174 sc->sc_busdev = gpiobus_attach_bus(dev);
175 if (sc->sc_busdev == NULL) {
180 /* Set the cached value to unknown */
181 for (i = 0; i < RK_GPIO_MAX_PINS; i++)
182 sc->pin_cached[i].is_gpio = 2;
185 sc->swporta = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DR);
186 sc->swporta_ddr = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DDR);
193 rk_gpio_detach(device_t dev)
195 struct rk_gpio_softc *sc;
197 sc = device_get_softc(dev);
200 gpiobus_detach_bus(dev);
201 bus_release_resources(dev, rk_gpio_spec, sc->sc_res);
202 mtx_destroy(&sc->sc_mtx);
203 clk_disable(sc->clk);
209 rk_gpio_get_bus(device_t dev)
211 struct rk_gpio_softc *sc;
213 sc = device_get_softc(dev);
215 return (sc->sc_busdev);
219 rk_gpio_pin_max(device_t dev, int *maxpin)
222 /* Each bank have always 32 pins */
229 rk_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
231 struct rk_gpio_softc *sc;
234 sc = device_get_softc(dev);
240 pin = pin - (bank * 8);
242 snprintf(name, GPIOMAXNAME, "P%c%d", bank + 'A', pin);
249 rk_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
251 struct rk_gpio_softc *sc;
254 sc = device_get_softc(dev);
256 if (__predict_false(sc->pin_cached[pin].is_gpio != 1)) {
257 rv = FDT_PINCTRL_IS_GPIO(sc->pinctrl, dev, pin, (bool *)&sc->pin_cached[pin].is_gpio);
260 if (sc->pin_cached[pin].is_gpio == 0)
265 rv = FDT_PINCTRL_GET_FLAGS(sc->pinctrl, dev, pin, flags);
268 sc->pin_cached[pin].flags = *flags;
270 if (sc->swporta_ddr & (1 << pin))
271 *flags |= GPIO_PIN_OUTPUT;
273 *flags |= GPIO_PIN_INPUT;
279 rk_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
282 *caps = RK_GPIO_DEFAULT_CAPS;
287 rk_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
289 struct rk_gpio_softc *sc;
292 sc = device_get_softc(dev);
294 if (__predict_false(sc->pin_cached[pin].is_gpio != 1)) {
295 rv = FDT_PINCTRL_IS_GPIO(sc->pinctrl, dev, pin, (bool *)&sc->pin_cached[pin].is_gpio);
298 if (sc->pin_cached[pin].is_gpio == 0)
302 if (__predict_false((flags & GPIO_PIN_INPUT) && ((flags & GPIO_FLAGS_PINCTRL) != sc->pin_cached[pin].flags))) {
303 rv = FDT_PINCTRL_SET_FLAGS(sc->pinctrl, dev, pin, flags);
304 sc->pin_cached[pin].flags = flags & GPIO_FLAGS_PINCTRL;
310 if (flags & GPIO_PIN_INPUT)
311 sc->swporta_ddr &= ~(1 << pin);
312 else if (flags & GPIO_PIN_OUTPUT)
313 sc->swporta_ddr |= (1 << pin);
315 RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DDR, sc->swporta_ddr);
322 rk_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
324 struct rk_gpio_softc *sc;
327 sc = device_get_softc(dev);
330 reg = RK_GPIO_READ(sc, RK_GPIO_EXT_PORTA);
333 *val = reg & (1 << pin) ? 1 : 0;
339 rk_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
341 struct rk_gpio_softc *sc;
343 sc = device_get_softc(dev);
347 sc->swporta |= (1 << pin);
349 sc->swporta &= ~(1 << pin);
350 RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
357 rk_gpio_pin_toggle(device_t dev, uint32_t pin)
359 struct rk_gpio_softc *sc;
361 sc = device_get_softc(dev);
364 if (sc->swporta & (1 << pin))
365 sc->swporta &= ~(1 << pin);
367 sc->swporta |= (1 << pin);
368 RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
375 rk_gpio_pin_access_32(device_t dev, uint32_t first_pin, uint32_t clear_pins,
376 uint32_t change_pins, uint32_t *orig_pins)
378 struct rk_gpio_softc *sc;
381 sc = device_get_softc(dev);
384 reg = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DR);
389 if ((clear_pins | change_pins) != 0) {
390 reg = (reg & ~clear_pins) ^ change_pins;
391 RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, reg);
399 rk_gpio_pin_config_32(device_t dev, uint32_t first_pin, uint32_t num_pins,
402 struct rk_gpio_softc *sc;
403 uint32_t reg, set, mask, flags;
406 sc = device_get_softc(dev);
408 if (first_pin != 0 || num_pins > 32)
413 for (i = 0; i < num_pins; i++) {
414 mask = (mask << 1) | 1;
415 flags = pin_flags[i];
416 if (flags & GPIO_PIN_INPUT) {
418 } else if (flags & GPIO_PIN_OUTPUT) {
424 reg = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DDR);
427 RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DDR, reg);
428 sc->swporta_ddr = reg;
435 rk_gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells,
436 pcell_t *gpios, uint32_t *pin, uint32_t *flags)
439 /* The gpios are mapped as <pin flags> */
446 rk_gpio_get_node(device_t bus, device_t dev)
449 /* We only have one child, the GPIO bus, which needs our own node. */
450 return (ofw_bus_get_node(bus));
453 static device_method_t rk_gpio_methods[] = {
454 /* Device interface */
455 DEVMETHOD(device_probe, rk_gpio_probe),
456 DEVMETHOD(device_attach, rk_gpio_attach),
457 DEVMETHOD(device_detach, rk_gpio_detach),
460 DEVMETHOD(gpio_get_bus, rk_gpio_get_bus),
461 DEVMETHOD(gpio_pin_max, rk_gpio_pin_max),
462 DEVMETHOD(gpio_pin_getname, rk_gpio_pin_getname),
463 DEVMETHOD(gpio_pin_getflags, rk_gpio_pin_getflags),
464 DEVMETHOD(gpio_pin_getcaps, rk_gpio_pin_getcaps),
465 DEVMETHOD(gpio_pin_setflags, rk_gpio_pin_setflags),
466 DEVMETHOD(gpio_pin_get, rk_gpio_pin_get),
467 DEVMETHOD(gpio_pin_set, rk_gpio_pin_set),
468 DEVMETHOD(gpio_pin_toggle, rk_gpio_pin_toggle),
469 DEVMETHOD(gpio_pin_access_32, rk_gpio_pin_access_32),
470 DEVMETHOD(gpio_pin_config_32, rk_gpio_pin_config_32),
471 DEVMETHOD(gpio_map_gpios, rk_gpio_map_gpios),
473 /* ofw_bus interface */
474 DEVMETHOD(ofw_bus_get_node, rk_gpio_get_node),
479 static driver_t rk_gpio_driver = {
482 sizeof(struct rk_gpio_softc),
486 * GPIO driver is always a child of rk_pinctrl driver and should be probed
487 * and attached within rk_pinctrl_attach function. Due to this, bus pass order
488 * must be same as bus pass order of rk_pinctrl driver.
490 EARLY_DRIVER_MODULE(rk_gpio, simplebus, rk_gpio_driver, 0, 0,
491 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);