[backfire] usbreset: merge r29611

git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@30365 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/usbreset/Makefile b/package/usbreset/Makefile
new file mode 100644 (file)
index 0000000..32e073f
--- /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 (file)
index 0000000..03d1787
--- /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;
+}