FreeBSD/Linux Kernel Cross Reference
sys/dev/gpio/gpiobusvar.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     *
     */
    
    #ifndef __GPIOBUS_H__
    #define __GPIOBUS_H__
    
    #include "opt_platform.h"
    
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/rman.h>
    
    #ifdef FDT
    #include <dev/ofw/ofw_bus_subr.h>
    #endif
    
    #ifdef  INTRNG
    #include <sys/intr.h>
    #endif
    
    #include "gpio_if.h"
    
    #ifdef FDT
    #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *)                         \
            &((struct ofw_gpiobus_devinfo *)device_get_ivars(d))->opd_dinfo
    #else
    #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d)
    #endif
    #define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d)
    #define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
    #define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
    #define GPIOBUS_LOCK_INIT(_sc) mtx_init(&_sc->sc_mtx,                   \
                device_get_nameunit(_sc->sc_dev), "gpiobus", MTX_DEF)
    #define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx)
    #define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED)
    #define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED)
    
    #define GPIOBUS_WAIT            1
    #define GPIOBUS_DONTWAIT        2
    
    /* Use default interrupt mode -  for gpio_alloc_intr_resource */
    #define GPIO_INTR_CONFORM       GPIO_INTR_NONE
    
    struct gpiobus_pin_data
    {
            int             mapped;         /* pin is mapped/reserved. */
            char            *name;          /* pin name. */
    };
    
    #ifdef INTRNG
    struct intr_map_data_gpio {
            struct intr_map_data    hdr;
            u_int                   gpio_pin_num;
            u_int                   gpio_pin_flags;
            u_int                   gpio_intr_mode;
    };
    #endif
    
    struct gpiobus_softc
    {
            struct mtx      sc_mtx;         /* bus mutex */
            struct rman     sc_intr_rman;   /* isr resources */
            device_t        sc_busdev;      /* bus device */
            device_t        sc_owner;       /* bus owner */
            device_t        sc_dev;         /* driver device */
            int             sc_npins;       /* total pins on bus */
            struct gpiobus_pin_data *sc_pins; /* pin data */
    };
    
    struct gpiobus_pin
    {
           device_t        dev;    /* gpio device */
           uint32_t        flags;  /* pin flags */
           uint32_t        pin;    /* pin number */
   };
   typedef struct gpiobus_pin *gpio_pin_t;
   
   struct gpiobus_ivar
   {
           struct resource_list    rl;     /* isr resource list */
           uint32_t        npins;  /* pins total */
           uint32_t        *pins;  /* pins map */
   };
   
   enum gpiobus_ivars {
           GPIOBUS_IVAR_NPINS      = 10500,
           GPIOBUS_IVAR_PINS,
   };
   
   #define GPIOBUS_ACCESSOR(var, ivar, type)                                 \
           __BUS_ACCESSOR(gpiobus, var, GPIOBUS, ivar, type)
   
   GPIOBUS_ACCESSOR(npins,         NPINS,          uint32_t)
   GPIOBUS_ACCESSOR(pins,          PINS,           const uint32_t *)
   
   #undef GPIOBUS_ACCESSOR
   
   #ifdef FDT
   struct ofw_gpiobus_devinfo {
           struct gpiobus_ivar     opd_dinfo;
           struct ofw_bus_devinfo  opd_obdinfo;
   };
   
   static __inline int
   gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells,
       pcell_t *gpios, uint32_t *pin, uint32_t *flags)
   {
           return (GPIO_MAP_GPIOS(bus, dev, gparent, gcells, gpios, pin, flags));
   }
   
   device_t ofw_gpiobus_add_fdt_child(device_t, const char *, phandle_t);
   int ofw_gpiobus_parse_gpios(device_t, char *, struct gpiobus_pin **);
   void ofw_gpiobus_register_provider(device_t);
   void ofw_gpiobus_unregister_provider(device_t);
   
   /* Acquire a pin by parsing FDT data. */
   int gpio_pin_get_by_ofw_name(device_t consumer, phandle_t node,
       char *name, gpio_pin_t *gpio);
   int gpio_pin_get_by_ofw_idx(device_t consumer, phandle_t node,
       int idx, gpio_pin_t *gpio);
   int gpio_pin_get_by_ofw_property(device_t consumer, phandle_t node,
       char *name, gpio_pin_t *gpio);
   int gpio_pin_get_by_ofw_propidx(device_t consumer, phandle_t node,
       char *name, int idx, gpio_pin_t *gpio);
   #endif /* FDT */
   
   /* Acquire a pin by bus and pin number. */
   int gpio_pin_get_by_bus_pinnum(device_t _bus, uint32_t _pinnum, gpio_pin_t *_gp);
   
   /* Acquire a pin by child and index (used by direct children of gpiobus). */
   int gpio_pin_get_by_child_index(device_t _child, uint32_t _idx, gpio_pin_t *_gp);
   
   /* Release a pin acquired via any gpio_pin_get_xxx() function. */
   void gpio_pin_release(gpio_pin_t gpio);
   
   /* Work with gpio pins acquired using the functions above. */
   int gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps);
   int gpio_pin_is_active(gpio_pin_t pin, bool *active);
   int gpio_pin_set_active(gpio_pin_t pin, bool active);
   int gpio_pin_setflags(gpio_pin_t pin, uint32_t flags);
   struct resource *gpio_alloc_intr_resource(device_t consumer_dev, int *rid,
       u_int alloc_flags, gpio_pin_t pin, uint32_t intr_mode);
   
   /*
    * Functions shared between gpiobus and other bus classes that derive from it;
    * these should not be called directly by other drivers.
    */
   int gpio_check_flags(uint32_t, uint32_t);
   device_t gpiobus_attach_bus(device_t);
   int gpiobus_detach_bus(device_t);
   int gpiobus_init_softc(device_t);
   int gpiobus_alloc_ivars(struct gpiobus_ivar *);
   void gpiobus_free_ivars(struct gpiobus_ivar *);
   int gpiobus_acquire_pin(device_t, uint32_t);
   int gpiobus_release_pin(device_t, uint32_t);
   
   extern driver_t gpiobus_driver;
   
   #endif  /* __GPIOBUS_H__ */

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