parent
600ad59fb3
commit
ba6751058b
@ -1,43 +0,0 @@ |
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#
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# Copyright (C) 2008 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk |
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include $(INCLUDE_DIR)/kernel.mk |
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PKG_NAME:=gpioctl
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PKG_RELEASE:=1
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PKG_VERSION:=1.0
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include $(INCLUDE_DIR)/package.mk |
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define Package/gpioctl |
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SECTION:=utils
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CATEGORY:=Utilities
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TITLE:=Tool for controlling gpio pins
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DEPENDS:=@GPIO_SUPPORT
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endef |
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define Package/gpioctl/description |
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Tool for controlling gpio pins
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endef |
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define Build/Prepare |
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mkdir -p $(PKG_BUILD_DIR)
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$(CP) ./src/* $(PKG_BUILD_DIR)/
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endef |
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define Build/Compile |
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$(MAKE) -C $(PKG_BUILD_DIR) \
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$(TARGET_CONFIGURE_OPTS) CFLAGS="$(TARGET_CFLAGS) -I$(LINUX_DIR)/include"
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endef |
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define Package/gpioctl/install |
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$(INSTALL_DIR) $(1)/usr/bin
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/gpioctl $(1)/usr/bin/
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endef |
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$(eval $(call BuildPackage,gpioctl)) |
@ -1,24 +0,0 @@ |
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PROGS = gpioctl
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INSTDIR = $(prefix)/usr/bin
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INSTMODE = 0755
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INSTOWNER = root
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INSTGROUP = root
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OBJS = main.o
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all: $(PROGS) |
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$(PROGS): $(OBJS) |
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$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
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$(STRIP) $@
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%.o: %.c |
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$(CC) -c $(CFLAGS) $^ -o $@
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install: $(PROGS) |
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$(INSTALL) -d $(INSTDIR)
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$(INSTALL) -m $(INSTMODE) -o $(INSTOWNER) -g $(INSTGROUP) $(PROGS) $(INSTDIR)
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clean: |
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rm -f $(PROGS) *.o core
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@ -1,76 +0,0 @@ |
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/*
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA |
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* |
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* Feedback, Bugs... blogic@openwrt.org
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* |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <linux/gpio_dev.h> |
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#include <linux/ioctl.h> |
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void |
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print_usage() |
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{ |
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printf("gpioctl dirin|dirout|get|set|clear gpio\n"); |
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exit(0); |
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} |
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int |
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main(int argc, char **argv) |
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{ |
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int gpio_pin; |
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int fd; |
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int result = 0; |
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if (argc != 3) |
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{ |
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print_usage(); |
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} |
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if ((fd = open("/dev/gpio", O_RDWR)) < 0) |
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{ |
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printf("Error whilst opening /dev/gpio\n"); |
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return -1; |
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} |
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gpio_pin = atoi(argv[2]); |
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printf("using gpio pin %d\n", gpio_pin); |
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if (!strcmp(argv[1], "dirin")) |
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{ |
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ioctl(fd, GPIO_DIR_IN, gpio_pin); |
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} else if (!strcmp(argv[1], "dirout")) |
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{ |
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ioctl(fd, GPIO_DIR_OUT, gpio_pin); |
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} else if (!strcmp(argv[1], "get")) |
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{ |
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result = ioctl(fd, GPIO_GET, gpio_pin); |
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printf("Pin %d is %s\n", gpio_pin, (result ? "HIGH" : "LOW")); |
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} else if (!strcmp(argv[1], "set")) |
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{ |
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ioctl(fd, GPIO_SET, gpio_pin); |
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} else if (!strcmp(argv[1], "clear")) |
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{ |
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ioctl(fd, GPIO_CLEAR, gpio_pin); |
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} else print_usage(); |
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return result; |
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} |
@ -1,181 +0,0 @@ |
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/*
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* character device wrapper for generic gpio layer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA |
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* |
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* Feedback, Bugs... blogic@openwrt.org |
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* |
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* dpg 20100106 |
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*/ |
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <asm/uaccess.h> |
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#include <asm/io.h> |
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#include <asm/gpio.h> |
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#include <asm/atomic.h> |
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#include <linux/init.h> |
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#include <linux/genhd.h> |
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#include <linux/device.h> |
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#include <linux/platform_device.h> |
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#include <linux/gpio_dev.h> |
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#include <linux/fs.h> |
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#define DRVNAME "gpiodev" |
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#define DEVNAME "gpio" |
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static int dev_major; |
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static struct class *gpiodev_class; |
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/* third argument of user space ioctl ('arg' here) contains the <pin> */ |
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static int |
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gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
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{ |
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int retval = 0; |
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switch (cmd) |
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{ |
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case GPIO_GET: |
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retval = gpio_get_value(arg); |
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break; |
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case GPIO_SET: |
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gpio_set_value(arg, 1); |
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break; |
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case GPIO_CLEAR: |
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gpio_set_value(arg, 0); |
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break; |
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case GPIO_DIR_IN: |
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retval = gpio_direction_input(arg); |
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break; |
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case GPIO_DIR_OUT: |
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retval = gpio_direction_output(arg, 0); |
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break; |
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case GPIO_DIR_HIGH: |
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retval = gpio_direction_output(arg, 1); |
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break; |
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case GPIO_REQUEST: |
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/* should be first ioctl operation on <pin> */ |
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retval = gpio_request(arg, DRVNAME); |
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break; |
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case GPIO_FREE: |
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/* should be last ioctl operation on <pin> */ |
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/* may be needed first if previous user missed this ioctl */ |
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gpio_free(arg); |
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break; |
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case GPIO_CAN_SLEEP: |
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retval = gpio_cansleep(arg); |
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break; |
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default: |
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retval = -EINVAL; |
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/* = -ENOTTY; // correct return but ... */ |
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break; |
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} |
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return retval; |
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} |
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/* Allow co-incident opens */ |
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static int |
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gpio_open(struct inode *inode, struct file *file) |
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{ |
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int result = 0; |
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unsigned int dev_minor = MINOR(inode->i_rdev); |
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if (dev_minor != 0) |
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{ |
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printk(KERN_ERR DRVNAME ": trying to access unknown minor device -> %d\n", dev_minor); |
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result = -ENODEV; |
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goto out; |
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} |
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out: |
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return result; |
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} |
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static int |
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gpio_close(struct inode * inode, struct file * file) |
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{ |
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/* could track all <pin>s requested by this fd and gpio_free()
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* them here |
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*/ |
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return 0; |
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} |
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struct file_operations gpio_fops = { |
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unlocked_ioctl: gpio_ioctl, |
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open: gpio_open, |
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release: gpio_close |
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}; |
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static int |
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gpio_probe(struct platform_device *dev) |
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{ |
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int result = 0; |
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dev_major = register_chrdev(0, DEVNAME, &gpio_fops); |
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if (!dev_major) |
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{ |
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printk(KERN_ERR DRVNAME ": Error whilst opening %s \n", DEVNAME); |
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result = -ENODEV; |
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goto out; |
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} |
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gpiodev_class = class_create(THIS_MODULE, DRVNAME); |
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device_create(gpiodev_class, NULL, MKDEV(dev_major, 0), dev, DEVNAME); |
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printk(KERN_INFO DRVNAME ": gpio device registered with major %d\n", dev_major); |
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out: |
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return result; |
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} |
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static int |
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gpio_remove(struct platform_device *dev) |
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{ |
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device_destroy(gpiodev_class, MKDEV(dev_major, 0)); |
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class_destroy(gpiodev_class); |
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unregister_chrdev(dev_major, DEVNAME); |
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return 0; |
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} |
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static struct |
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platform_driver gpio_driver = { |
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.probe = gpio_probe, |
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.remove = gpio_remove, |
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.driver = { |
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.name = "GPIODEV", |
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.owner = THIS_MODULE, |
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}, |
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}; |
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static int __init |
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gpio_mod_init(void) |
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{ |
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int ret = platform_driver_register(&gpio_driver); |
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if (ret) |
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printk(KERN_INFO DRVNAME ": Error registering platfom driver!\n"); |
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return ret; |
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} |
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static void __exit |
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gpio_mod_exit(void) |
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{ |
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platform_driver_unregister(&gpio_driver); |
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} |
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module_init (gpio_mod_init); |
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module_exit (gpio_mod_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("John Crispin / OpenWrt +"); |
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MODULE_DESCRIPTION("Character device for for generic gpio api"); |
@ -1,42 +0,0 @@ |
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#ifndef _GPIO_DEV_H__ |
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#define _GPIO_DEV_H__ |
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/*********************************************************************
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* |
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* This Linux kernel header is expanded from the original driver |
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* (gpio_dev) by John Crispin. It provides an ioctl based interface to |
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* GPIO pins via the /dev/gpio char device and gpiolib within the kernel. |
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* The third argument to each ioctl is the GPIO pin number. |
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* |
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* This driver has been tested with lk 2.6.31 and works. The original |
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* driver fails quietly with this version. The protocol is now a bit |
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* different: the ioctl(fd, GPIO_REQUEST, <pin>) should be called |
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* after the open("/dev/gpio", O_RDWR) to determine if the <pin> is |
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* already in use. If the ioctl is successful (i.e. returns 0 for not |
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* in use) then the <pin> is claimed by this driver and |
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* ioctl(fd, GPIO_FREE, <pin>) should be called prior to close(fd) . |
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*
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* See <kernel_source>/Documentation/gpio.txt |
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* Note that kernel designers prefer the use of the sysfs gpio interface. |
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* This char driver is easier to use from code and faster. |
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********************************************************************/ |
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/* This header can be included in both the user and kernel spaces */ |
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/* The _IO macro is defined in sys/ioctl.h */ |
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#define IOC_GPIODEV_MAGIC 'B' |
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#define GPIO_GET _IO(IOC_GPIODEV_MAGIC, 10) |
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#define GPIO_SET _IO(IOC_GPIODEV_MAGIC, 11) |
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#define GPIO_CLEAR _IO(IOC_GPIODEV_MAGIC, 12) |
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#define GPIO_DIR_IN _IO(IOC_GPIODEV_MAGIC, 13) |
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#define GPIO_DIR_OUT _IO(IOC_GPIODEV_MAGIC, 14) |
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/* Sets the direction out and clears the <pin> (low) */ |
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#define GPIO_DIR_HIGH _IO(IOC_GPIODEV_MAGIC, 15) |
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/* Sets the direction out and sets the <pin> (high) */ |
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#define GPIO_REQUEST _IO(IOC_GPIODEV_MAGIC, 16) |
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#define GPIO_FREE _IO(IOC_GPIODEV_MAGIC, 17) |
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#define GPIO_CAN_SLEEP _IO(IOC_GPIODEV_MAGIC, 18) |
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#endif |
@ -1,27 +0,0 @@ |
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--- a/drivers/char/Kconfig
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+++ b/drivers/char/Kconfig
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@@ -511,6 +511,14 @@ config NSC_GPIO
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pc8736x_gpio drivers. If those drivers are built as
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modules, this one will be too, named nsc_gpio
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+config GPIO_DEVICE
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+ tristate "GPIO device support"
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+ depends on GENERIC_GPIO
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+ help
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+ Say Y to enable Linux GPIO device support. This allows control of
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+ GPIO pins using a character device
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+
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+
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config RAW_DRIVER
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tristate "RAW driver (/dev/raw/rawN)"
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depends on BLOCK
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--- a/drivers/char/Makefile
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+++ b/drivers/char/Makefile
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@@ -47,6 +47,7 @@ obj-$(CONFIG_NWFLASH) += nwflash.o
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obj-$(CONFIG_SCx200_GPIO) += scx200_gpio.o
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obj-$(CONFIG_PC8736x_GPIO) += pc8736x_gpio.o
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obj-$(CONFIG_NSC_GPIO) += nsc_gpio.o
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+obj-$(CONFIG_GPIO_DEVICE) += gpio_dev.o
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obj-$(CONFIG_GPIO_TB0219) += tb0219.o
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obj-$(CONFIG_TELCLOCK) += tlclk.o
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