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authorOleksandr Tymoshenko <gonzo@FreeBSD.org>2010-09-28 03:24:53 +0000
committerOleksandr Tymoshenko <gonzo@FreeBSD.org>2010-09-28 03:24:53 +0000
commit6b34b16ea590b8ee217401f271beb5090d710615 (patch)
tree2889a68717dca3893d685b194fe703a94419d12b /sys/sys/gpio.h
parent25e45560da3484478e58132bd70318f15874ad62 (diff)
downloadsrc-6b34b16ea590b8ee217401f271beb5090d710615.tar.gz
src-6b34b16ea590b8ee217401f271beb5090d710615.zip
Initial GPIO bus support. Includes:
- GPIO bus controller interface - GPIO bus interface - Implementation of GPIO led(4) compatible device - Implementation of iic(4) bus over GPIO (author: Luiz Otavio O Souza) Tested by: Luiz Otavio O Souza, Alexandr Rybalko
Notes
Notes: svn path=/head/; revision=213237
Diffstat (limited to 'sys/sys/gpio.h')
-rw-r--r--sys/sys/gpio.h97
1 files changed, 97 insertions, 0 deletions
diff --git a/sys/sys/gpio.h b/sys/sys/gpio.h
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+/* $NetBSD: gpio.h,v 1.7 2009/09/25 20:27:50 mbalmer Exp $ */
+/* $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $ */
+/*-
+ * 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 unmodified, 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.
+ *
+ * $FreeBSD$
+ *
+ */
+
+/*
+ * Copyright (c) 2009 Marc Balmer <marc@msys.ch>
+ * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __GPIO_H__
+#define __GPIO_H__
+
+#include <sys/ioccom.h>
+
+/* GPIO pin states */
+#define GPIO_PIN_LOW 0x00 /* low level (logical 0) */
+#define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */
+
+/* Max name length of a pin */
+#define GPIOMAXNAME 64
+
+/* GPIO pin configuration flags */
+#define GPIO_PIN_INPUT 0x0001 /* input direction */
+#define GPIO_PIN_OUTPUT 0x0002 /* output direction */
+#define GPIO_PIN_OPENDRAIN 0x0004 /* open-drain output */
+#define GPIO_PIN_PUSHPULL 0x0008 /* push-pull output */
+#define GPIO_PIN_TRISTATE 0x0010 /* output disabled */
+#define GPIO_PIN_PULLUP 0x0020 /* internal pull-up enabled */
+#define GPIO_PIN_PULLDOWN 0x0040 /* internal pull-down enabled */
+#define GPIO_PIN_INVIN 0x0080 /* invert input */
+#define GPIO_PIN_INVOUT 0x0100 /* invert output */
+#define GPIO_PIN_PULSATE 0x0200 /* pulsate in hardware */
+
+struct gpio_pin {
+ uint32_t gp_pin; /* pin number */
+ char gp_name[GPIOMAXNAME]; /* human-readable name */
+ uint32_t gp_caps; /* capabilities */
+ uint32_t gp_flags; /* current flags */
+};
+
+/* GPIO pin request (read/write/toggle) */
+struct gpio_req {
+ uint32_t gp_pin; /* pin number */
+ uint32_t gp_value; /* value */
+};
+
+/*
+ * ioctls
+ */
+#define GPIOMAXPIN _IOR('G', 0, int)
+#define GPIOGETCONFIG _IOWR('G', 1, struct gpio_pin)
+#define GPIOSETCONFIG _IOW('G', 2, struct gpio_pin)
+#define GPIOGET _IOWR('G', 3, struct gpio_req)
+#define GPIOSET _IOW('G', 4, struct gpio_req)
+#define GPIOTOGGLE _IOWR('G', 5, struct gpio_req)
+
+#endif /* __GPIO_H__ */