add userspace tool for gpio_dev

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10267 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/gpioctl/Makefile

@@ -0,0 +1,43 @@
+#
+# Copyright (C) 2008 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+# $Id$
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=gpioctl
+PKG_RELEASE:=1
+PKG_VERSION:=1.0
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/gpioctl
+  SECTION:=utils
+  CATEGORY:=Utilities
+  TITLE:=Tool for controlling gpio pins
+endef
+
+define Package/gpioctl/description
+	Tool for controlling gpio pins
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Compile
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		$(TARGET_CONFIGURE_OPTS) CFLAGS="$(TARGET_CFLAGS) -I$(LINUX_DIR)/include" 
+endef
+
+define Package/gpioctl/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/gpioctl $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,gpioctl))

package/gpioctl/src/Makefile

@@ -0,0 +1,24 @@
+PROGS     = gpioctl
+
+INSTDIR   = $(prefix)/usr/bin
+INSTMODE  = 0755
+INSTOWNER = root
+INSTGROUP = root
+
+OBJS = main.o
+
+all: $(PROGS)
+$(PROGS): $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
+	$(STRIP) $@
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $^ -o $@
+
+install: $(PROGS)
+	$(INSTALL) -d $(INSTDIR)
+	$(INSTALL) -m $(INSTMODE) -o $(INSTOWNER) -g $(INSTGROUP) $(PROGS) $(INSTDIR)
+
+clean:
+	rm -f $(PROGS) *.o core
+

package/gpioctl/src/main.c

@@ -0,0 +1,76 @@
+/*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
+*
+* Feedback, Bugs...  blogic@openwrt.org 
+*
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/gpio_dev.h>
+#include <linux/ioctl.h>
+
+void
+print_usage()
+{
+	printf("gpioctl dirin|dirout|get|set|clear gpio\n");
+	exit(0);
+}
+
+int
+main(int argc, char **argv)
+{
+	int gpio_pin;
+	int fd;
+	int result = 0;
+
+	if (argc != 3)
+	{
+		print_usage();
+	}
+
+	if ((fd = open("/dev/gpio", O_RDWR)) < 0)
+	{
+        printf("Error whilst opening /dev/gpio\n");
+        return -1;
+	}
+
+	gpio_pin = atoi(argv[2]);
+
+	printf("using gpio pin %d\n", gpio_pin);
+
+	if (!strcmp(argv[1], "dirin"))
+	{
+		ioctl(fd, GPIO_DIR_IN, gpio_pin);
+	} else if (!strcmp(argv[1], "dirout"))
+	{
+		ioctl(fd, GPIO_DIR_OUT, gpio_pin);
+	} else if (!strcmp(argv[1], "get"))
+	{
+		result = ioctl(fd, GPIO_GET, gpio_pin);
+		printf("Pin %d is %s\n", (result ? "HIGH" : "LOW"));
+	} else if (!strcmp(argv[1], "set"))
+	{
+		ioctl(fd, GPIO_SET, gpio_pin);
+	} else if (!strcmp(argv[1], "clear"))
+	{
+		ioctl(fd, GPIO_CLEAR, gpio_pin);
+	} else print_usage();
+
+	return result;
+}

target/linux/generic-2.6/files/drivers/gpio/gpio_dev.c

@@ -44,7 +44,7 @@ gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned
 {
 	int retval = 0;
 
-	if ((arg & gpio_access_mask) != arg)
+	if (((1 << arg) & gpio_access_mask) != (1 << arg))
 	{
 		retval = -EINVAL;
 		goto out;
@@ -57,7 +57,7 @@ gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned
 		break;
 
 	case GPIO_SET:
-		gpio_set_value(arg, 0);
+		gpio_set_value(arg, 1);
 		break;
 
 	case GPIO_CLEAR: