The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
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    1 /* $NetBSD: gpio.h,v 1.16 2018/05/19 13:59:06 thorpej Exp $ */
    2 /*      $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $        */
    3 /*
    4  * Copyright (c) 2009, 2011 Marc Balmer <marc@msys.ch>
    5  * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
    6  *
    7  * Permission to use, copy, modify, and distribute this software for any
    8  * purpose with or without fee is hereby granted, provided that the above
    9  * copyright notice and this permission notice appear in all copies.
   10  *
   11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   18  */
   19 
   20 #ifndef _SYS_GPIO_H_
   21 #define _SYS_GPIO_H_
   22 
   23 #include <sys/ioccom.h>
   24 #include <sys/time.h>
   25 
   26 /* GPIO pin states */
   27 #define GPIO_PIN_LOW            0x00    /* low level (logical 0) */
   28 #define GPIO_PIN_HIGH           0x01    /* high level (logical 1) */
   29 
   30 /* Max name length of a pin */
   31 #define GPIOMAXNAME             64
   32 
   33 /* GPIO pin configuration flags */
   34 #define GPIO_PIN_INPUT          0x00000001      /* input direction */
   35 #define GPIO_PIN_OUTPUT         0x00000002      /* output direction */
   36 #define GPIO_PIN_INOUT          0x00000004      /* bi-directional */
   37 #define GPIO_PIN_OPENDRAIN      0x00000008      /* open-drain output */
   38 #define GPIO_PIN_PUSHPULL       0x00000010      /* push-pull output */
   39 #define GPIO_PIN_TRISTATE       0x00000020      /* output disabled */
   40 #define GPIO_PIN_PULLUP         0x00000040      /* internal pull-up enabled */
   41 #define GPIO_PIN_PULLDOWN       0x00000080      /* internal pull-down enabled */
   42 #define GPIO_PIN_INVIN          0x00000100      /* invert input */
   43 #define GPIO_PIN_INVOUT         0x00000200      /* invert output */
   44 #define GPIO_PIN_USER           0x00000400      /* user != 0 can access */
   45 #define GPIO_PIN_PULSATE        0x00000800      /* pulsate in hardware */
   46 #define GPIO_PIN_SET            0x00008000      /* set for securelevel access */
   47 #define GPIO_PIN_ALT0           0x00010000      /* alternate function 0 */
   48 #define GPIO_PIN_ALT1           0x00020000      /* alternate function 1 */
   49 #define GPIO_PIN_ALT2           0x00040000      /* alternate function 2 */
   50 #define GPIO_PIN_ALT3           0x00080000      /* alternate function 3 */
   51 #define GPIO_PIN_ALT4           0x00100000      /* alternate function 4 */
   52 #define GPIO_PIN_ALT5           0x00200000      /* alternate function 5 */
   53 #define GPIO_PIN_ALT6           0x00400000      /* alternate function 6 */
   54 #define GPIO_PIN_ALT7           0x00800000      /* alternate function 7 */
   55 
   56 #define GPIO_PIN_HWCAPS         (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
   57                                  GPIO_PIN_INOUT | GPIO_PIN_OPENDRAIN | \
   58                                  GPIO_PIN_PUSHPULL | GPIO_PIN_TRISTATE | \
   59                                  GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN | \
   60                                  GPIO_PIN_PULSATE | GPIO_PIN_ALT0 | \
   61                                  GPIO_PIN_ALT1 | GPIO_PIN_ALT2 | \
   62                                  GPIO_PIN_ALT3 | GPIO_PIN_ALT4 | \
   63                                  GPIO_PIN_ALT5 | GPIO_PIN_ALT6 | \
   64                                  GPIO_PIN_ALT7)
   65 
   66 /* GPIO interrupt flags */
   67 #define GPIO_INTR_POS_EDGE      0x00000001      /* interrupt on rising edge */
   68 #define GPIO_INTR_NEG_EDGE      0x00000002      /* interrupt on falling edge */
   69 #define GPIO_INTR_DOUBLE_EDGE   0x00000004      /* interrupt on both edges */
   70 #define GPIO_INTR_HIGH_LEVEL    0x00000008      /* interrupt on high level */
   71 #define GPIO_INTR_LOW_LEVEL     0x00000010      /* interrupt on low level */
   72 #define GPIO_INTR_MPSAFE        0x80000000      /* MP-safe handling */
   73 
   74 #define GPIO_INTR_EDGE_MASK     (GPIO_INTR_POS_EDGE | \
   75                                  GPIO_INTR_NEG_EDGE | \
   76                                  GPIO_INTR_DOUBLE_EDGE)
   77 #define GPIO_INTR_LEVEL_MASK    (GPIO_INTR_HIGH_LEVEL | \
   78                                  GPIO_INTR_LOW_LEVEL)
   79 #define GPIO_INTR_MODE_MASK     (GPIO_INTR_EDGE_MASK | \
   80                                  GPIO_INTR_LEVEL_MASK)
   81 
   82 /* GPIO controller description */
   83 struct gpio_info {
   84         int gpio_npins;         /* total number of pins available */
   85 };
   86 
   87 /* GPIO pin request (read/write/toggle) */
   88 struct gpio_req {
   89         char            gp_name[GPIOMAXNAME];   /* pin name */
   90         int             gp_pin;                 /* pin number */
   91         int             gp_value;               /* value */
   92 };
   93 
   94 /* GPIO pin configuration */
   95 struct gpio_set {
   96         char    gp_name[GPIOMAXNAME];
   97         int     gp_pin;
   98         int     gp_caps;
   99         int     gp_flags;
  100         char    gp_name2[GPIOMAXNAME];  /* new name */
  101 };
  102 
  103 /* Attach device drivers that use GPIO pins */
  104 struct gpio_attach {
  105         char            ga_dvname[16];  /* device name */
  106         int             ga_offset;      /* pin number */
  107         uint32_t        ga_mask;        /* binary mask */
  108         uint32_t        ga_flags;       /* driver dependent flags */
  109 };
  110 
  111 /* gpio(4) API */
  112 #define GPIOINFO                _IOR('G', 0, struct gpio_info)
  113 #define GPIOSET                 _IOWR('G', 5, struct gpio_set)
  114 #define GPIOUNSET               _IOWR('G', 6, struct gpio_set)
  115 #define GPIOREAD                _IOWR('G', 7, struct gpio_req)
  116 #define GPIOWRITE               _IOWR('G', 8, struct gpio_req)
  117 #define GPIOTOGGLE              _IOWR('G', 9, struct gpio_req)
  118 #define GPIOATTACH              _IOWR('G', 10, struct gpio_attach)
  119 
  120 #ifdef COMPAT_50
  121 /* Old structure to attach/detach devices */
  122 struct gpio_attach50 {
  123         char            ga_dvname[16];  /* device name */
  124         int             ga_offset;      /* pin number */
  125         uint32_t        ga_mask;        /* binary mask */
  126 };
  127 
  128 /* GPIO pin control (old API) */
  129 struct gpio_pin_ctl {
  130         int gp_pin;             /* pin number */
  131         int gp_caps;            /* pin capabilities (read-only) */
  132         int gp_flags;           /* pin configuration flags */
  133 };
  134 
  135 /* GPIO pin operation (read/write/toggle) (old API) */
  136 struct gpio_pin_op {
  137         int gp_pin;             /* pin number */
  138         int gp_value;           /* value */
  139 };
  140 
  141 /* the old API */
  142 #define GPIOPINREAD             _IOWR('G', 1, struct gpio_pin_op)
  143 #define GPIOPINWRITE            _IOWR('G', 2, struct gpio_pin_op)
  144 #define GPIOPINTOGGLE           _IOWR('G', 3, struct gpio_pin_op)
  145 #define GPIOPINCTL              _IOWR('G', 4, struct gpio_pin_ctl)
  146 #define GPIOATTACH50            _IOWR('G', 10, struct gpio_attach50)
  147 #define GPIODETACH50            _IOWR('G', 11, struct gpio_attach50)
  148 #define GPIODETACH              _IOWR('G', 11, struct gpio_attach)
  149 #endif  /* COMPAT_50 */
  150 
  151 #endif  /* !_SYS_GPIO_H_ */

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