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| -rw-r--r-- | package/usbreset/Makefile | 44 | ||||
| -rw-r--r-- | package/usbreset/src/usbreset.c | 76 |
2 files changed, 120 insertions, 0 deletions
diff --git a/package/usbreset/Makefile b/package/usbreset/Makefile new file mode 100644 index 000000000..32e073faa --- /dev/null +++ b/package/usbreset/Makefile @@ -0,0 +1,44 @@ +# +# Copyright (C) 2011 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +include $(TOPDIR)/rules.mk + +PKG_NAME:=usbreset +PKG_RELEASE:=1 + +include $(INCLUDE_DIR)/package.mk + +define Package/usbreset + SECTION:=utils + CATEGORY:=Utilities + TITLE:=Utility to send a USB port reset to a USB device + MAINTAINER:=Jo-Philipp Wich <xm@subsignal.org> +endef + +define Package/usbreset/description + This package contains the small usbreset utility which + can be used to send a USB port reset to a USB device - + useful for debugging or to force re-detection of particular + devices. +endef + +define Build/Prepare + $(INSTALL_DIR) $(PKG_BUILD_DIR) + $(INSTALL_DATA) ./src/usbreset.c $(PKG_BUILD_DIR)/ +endef + +define Build/Compile + $(TARGET_CC) $(TARGET_CFLAGS) -Wall \ + -o $(PKG_BUILD_DIR)/usbreset $(PKG_BUILD_DIR)/usbreset.c +endef + +define Package/usbreset/install + $(INSTALL_DIR) $(1)/usr/bin + $(INSTALL_BIN) $(PKG_BUILD_DIR)/usbreset $(1)/usr/bin/ +endef + +$(eval $(call BuildPackage,usbreset)) diff --git a/package/usbreset/src/usbreset.c b/package/usbreset/src/usbreset.c new file mode 100644 index 000000000..03d178753 --- /dev/null +++ b/package/usbreset/src/usbreset.c @@ -0,0 +1,76 @@ +/* usbreset -- send a USB port reset to a USB device */ + +/* + +http://marc.info/?l=linux-usb-users&m=116827193506484&w=2 + +and needs mounted usbfs filesystem + + sudo mount -t usbfs none /proc/bus/usb + +There is a way to suspend a USB device. In order to use it, +you must have a kernel with CONFIG_PM_SYSFS_DEPRECATED turned on. To +suspend a device, do (as root): + + echo -n 2 >/sys/bus/usb/devices/.../power/state + +where the "..." is the ID for your device. To unsuspend, do the same +thing but with a "0" instead of the "2" above. + +Note that this mechanism is slated to be removed from the kernel within +the next year. Hopefully some other mechanism will take its place. + +> To reset a +> device? + +Here's a program to do it. You invoke it as either + + usbreset /proc/bus/usb/BBB/DDD +or + usbreset /dev/usbB.D + +depending on how your system is set up, where BBB and DDD are the bus and +device address numbers. + +Alan Stern + +*/ + +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <sys/ioctl.h> + +#include <linux/usbdevice_fs.h> + + +int main(int argc, char **argv) +{ + const char *filename; + int fd; + int rc; + + if (argc != 2) { + fprintf(stderr, "Usage: usbreset device-filename\n"); + return 1; + } + filename = argv[1]; + + fd = open(filename, O_WRONLY); + if (fd < 0) { + perror("Error opening output file"); + return 1; + } + + printf("Resetting USB device %s\n", filename); + rc = ioctl(fd, USBDEVFS_RESET, 0); + if (rc < 0) { + perror("Error in ioctl"); + return 1; + } + printf("Reset successful\n"); + + close(fd); + return 0; +} |