1 /*- 2 * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 * 28 */ 29 30 #ifndef __GPIOBUS_H__ 31 #define __GPIOBUS_H__ 32 33 #include "opt_platform.h" 34 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/rman.h> 38 39 #ifdef FDT 40 #include <dev/ofw/ofw_bus_subr.h> 41 #include <gnu/dts/include/dt-bindings/gpio/gpio.h> 42 #endif 43 44 #include "gpio_if.h" 45 46 #ifdef FDT 47 #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) \ 48 &((struct ofw_gpiobus_devinfo *)device_get_ivars(d))->opd_dinfo 49 #else 50 #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d) 51 #endif 52 #define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d) 53 #define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 54 #define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 55 #define GPIOBUS_LOCK_INIT(_sc) mtx_init(&_sc->sc_mtx, \ 56 device_get_nameunit(_sc->sc_dev), "gpiobus", MTX_DEF) 57 #define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx) 58 #define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED) 59 #define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED) 60 61 #define GPIOBUS_WAIT 1 62 #define GPIOBUS_DONTWAIT 2 63 64 /* Use default interrupt mode - for gpio_alloc_intr_resource */ 65 #define GPIO_INTR_CONFORM GPIO_INTR_NONE 66 67 struct gpiobus_pin_data 68 { 69 int mapped; /* pin is mapped/reserved. */ 70 char *name; /* pin name. */ 71 }; 72 73 struct intr_map_data_gpio { 74 struct intr_map_data hdr; 75 u_int gpio_pin_num; 76 u_int gpio_pin_flags; 77 u_int gpio_intr_mode; 78 }; 79 80 struct gpiobus_softc 81 { 82 struct mtx sc_mtx; /* bus mutex */ 83 struct rman sc_intr_rman; /* isr resources */ 84 device_t sc_busdev; /* bus device */ 85 device_t sc_owner; /* bus owner */ 86 device_t sc_dev; /* driver device */ 87 int sc_npins; /* total pins on bus */ 88 struct gpiobus_pin_data *sc_pins; /* pin data */ 89 }; 90 91 struct gpiobus_pin 92 { 93 device_t dev; /* gpio device */ 94 uint32_t flags; /* pin flags */ 95 uint32_t pin; /* pin number */ 96 }; 97 typedef struct gpiobus_pin *gpio_pin_t; 98 99 struct gpiobus_ivar 100 { 101 struct resource_list rl; /* isr resource list */ 102 uint32_t npins; /* pins total */ 103 uint32_t *flags; /* pins flags */ 104 uint32_t *pins; /* pins map */ 105 }; 106 107 #ifdef FDT 108 struct ofw_gpiobus_devinfo { 109 struct gpiobus_ivar opd_dinfo; 110 struct ofw_bus_devinfo opd_obdinfo; 111 }; 112 113 static __inline int 114 gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells, 115 pcell_t *gpios, uint32_t *pin, uint32_t *flags) 116 { 117 return (GPIO_MAP_GPIOS(bus, dev, gparent, gcells, gpios, pin, flags)); 118 } 119 120 device_t ofw_gpiobus_add_fdt_child(device_t, const char *, phandle_t); 121 int ofw_gpiobus_parse_gpios(device_t, char *, struct gpiobus_pin **); 122 void ofw_gpiobus_register_provider(device_t); 123 void ofw_gpiobus_unregister_provider(device_t); 124 125 /* Consumers interface. */ 126 int gpio_pin_get_by_ofw_name(device_t consumer, phandle_t node, 127 char *name, gpio_pin_t *gpio); 128 int gpio_pin_get_by_ofw_idx(device_t consumer, phandle_t node, 129 int idx, gpio_pin_t *gpio); 130 int gpio_pin_get_by_ofw_property(device_t consumer, phandle_t node, 131 char *name, gpio_pin_t *gpio); 132 void gpio_pin_release(gpio_pin_t gpio); 133 int gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps); 134 int gpio_pin_is_active(gpio_pin_t pin, bool *active); 135 int gpio_pin_set_active(gpio_pin_t pin, bool active); 136 int gpio_pin_setflags(gpio_pin_t pin, uint32_t flags); 137 #endif 138 struct resource *gpio_alloc_intr_resource(device_t consumer_dev, int *rid, 139 u_int alloc_flags, gpio_pin_t pin, uint32_t intr_mode); 140 int gpio_check_flags(uint32_t, uint32_t); 141 device_t gpiobus_attach_bus(device_t); 142 int gpiobus_detach_bus(device_t); 143 int gpiobus_init_softc(device_t); 144 int gpiobus_alloc_ivars(struct gpiobus_ivar *); 145 void gpiobus_free_ivars(struct gpiobus_ivar *); 146 int gpiobus_acquire_pin(device_t, uint32_t); 147 int gpiobus_release_pin(device_t, uint32_t); 148 149 extern driver_t gpiobus_driver; 150 151 #endif /* __GPIOBUS_H__ */ 152