USB: testusb: an USB testing application

The testusb program just issues ioctls to perform the tests
implemented by the kernel driver.  It can generate a variety
of transfer patterns; you should make sure to test both regular
streaming and mixes of  transfer sizes (including short transfers).

For more information on how this can be used and on USB testing
refer to <URL:http://www.linux-usb.org/usbtest/>.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

tools/usb/testusb.c

+/* $(CROSS_COMPILE)cc -Wall -g -lpthread -o testusb testusb.c */
+
+/*
+ * Copyright (c) 2002 by David Brownell
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ftw.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <sys/ioctl.h>
+#include <linux/usbdevice_fs.h>
+
+/*-------------------------------------------------------------------------*/
+
+#define	TEST_CASES	30
+
+// FIXME make these public somewhere; usbdevfs.h?
+
+struct usbtest_param {
+	// inputs
+	unsigned		test_num;	/* 0..(TEST_CASES-1) */
+	unsigned		iterations;
+	unsigned		length;
+	unsigned		vary;
+	unsigned		sglen;
+
+	// outputs
+	struct timeval		duration;
+};
+#define USBTEST_REQUEST	_IOWR('U', 100, struct usbtest_param)
+
+/*-------------------------------------------------------------------------*/
+
+/* #include <linux/usb_ch9.h> */
+
+struct usb_device_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+	__u16 bcdUSB;
+	__u8  bDeviceClass;
+	__u8  bDeviceSubClass;
+	__u8  bDeviceProtocol;
+	__u8  bMaxPacketSize0;
+	__u16 idVendor;
+	__u16 idProduct;
+	__u16 bcdDevice;
+	__u8  iManufacturer;
+	__u8  iProduct;
+	__u8  iSerialNumber;
+	__u8  bNumConfigurations;
+} __attribute__ ((packed));
+
+enum usb_device_speed {
+	USB_SPEED_UNKNOWN = 0,			/* enumerating */
+	USB_SPEED_LOW, USB_SPEED_FULL,		/* usb 1.1 */
+	USB_SPEED_HIGH				/* usb 2.0 */
+};
+
+/*-------------------------------------------------------------------------*/
+
+static char *speed (enum usb_device_speed s)
+{
+	switch (s) {
+	case USB_SPEED_UNKNOWN:	return "unknown";
+	case USB_SPEED_LOW:	return "low";
+	case USB_SPEED_FULL:	return "full";
+	case USB_SPEED_HIGH:	return "high";
+	default:		return "??";
+	}
+}
+
+struct testdev {
+	struct testdev		*next;
+	char			*name;
+	pthread_t		thread;
+	enum usb_device_speed	speed;
+	unsigned		ifnum : 8;
+	unsigned		forever : 1;
+	int			test;
+
+	struct usbtest_param	param;
+};
+static struct testdev		*testdevs;
+
+static int is_testdev (struct usb_device_descriptor *dev)
+{
+	/* FX2 with (tweaked) bulksrc firmware */
+	if (dev->idVendor == 0x0547 && dev->idProduct == 0x1002)
+		return 1;
+
+	/*----------------------------------------------------*/
+
+	/* devices that start up using the EZ-USB default device and
+	 * which we can use after loading simple firmware.  hotplug
+	 * can fxload it, and then run this test driver.
+	 *
+	 * we return false positives in two cases:
+	 * - the device has a "real" driver (maybe usb-serial) that
+	 *   renumerates.  the device should vanish quickly.
+	 * - the device doesn't have the test firmware installed.
+	 */
+
+	/* generic EZ-USB FX controller */
+	if (dev->idVendor == 0x0547 && dev->idProduct == 0x2235)
+		return 1;
+
+	/* generic EZ-USB FX2 controller */
+	if (dev->idVendor == 0x04b4 && dev->idProduct == 0x8613)
+		return 1;
+
+	/* CY3671 development board with EZ-USB FX */
+	if (dev->idVendor == 0x0547 && dev->idProduct == 0x0080)
+		return 1;
+
+	/* Keyspan 19Qi uses an21xx (original EZ-USB) */
+	if (dev->idVendor == 0x06cd && dev->idProduct == 0x010b)
+		return 1;
+
+	/*----------------------------------------------------*/
+
+	/* "gadget zero", Linux-USB test software */
+	if (dev->idVendor == 0x0525 && dev->idProduct == 0xa4a0)
+		return 1;
+
+	/* user mode subset of that */
+	if (dev->idVendor == 0x0525 && dev->idProduct == 0xa4a4)
+		return 1;
+
+	/* iso version of usermode code */
+	if (dev->idVendor == 0x0525 && dev->idProduct == 0xa4a3)
+		return 1;
+
+	/* some GPL'd test firmware uses these IDs */
+
+	if (dev->idVendor == 0xfff0 && dev->idProduct == 0xfff0)
+		return 1;
+
+	/*----------------------------------------------------*/
+
+	/* iBOT2 high speed webcam */
+	if (dev->idVendor == 0x0b62 && dev->idProduct == 0x0059)
+		return 1;
+
+	return 0;
+}
+
+static int find_testdev (const char *name, const struct stat *sb, int flag)
+{
+	int				fd;
+	struct usb_device_descriptor	dev;
+
+	if (flag != FTW_F)
+		return 0;
+	/* ignore /proc/bus/usb/{devices,drivers} */
+	if (strrchr (name, '/')[1] == 'd')
+		return 0;
+
+	if ((fd = open (name, O_RDONLY)) < 0) {
+		perror ("can't open dev file r/o");
+		return 0;
+	}
+	if (read (fd, &dev, sizeof dev) != sizeof dev)
+		fputs ("short devfile read!\n", stderr);
+	else if (is_testdev (&dev)) {
+		struct testdev		*entry;
+
+		if ((entry = calloc (1, sizeof *entry)) == 0) {
+			fputs ("no mem!\n", stderr);
+			goto done;
+		}
+		entry->name = strdup (name);
+		if (!entry->name) {
+			free (entry);
+			goto done;
+		}
+
+		// FIXME better to look at each interface and ask if it's
+		// bound to 'usbtest', rather than assume interface 0
+		entry->ifnum = 0;
+
+		// FIXME ask usbfs what speed; update USBDEVFS_CONNECTINFO
+		// so it tells about high speed etc
+
+		fprintf (stderr, "%s speed\t%s\n",
+				speed (entry->speed), entry->name);
+
+		entry->next = testdevs;
+		testdevs = entry;
+	}
+
+done:
+	close (fd);
+	return 0;
+}
+
+static int
+usbdev_ioctl (int fd, int ifno, unsigned request, void *param)
+{
+	struct usbdevfs_ioctl	wrapper;
+
+	wrapper.ifno = ifno;
+	wrapper.ioctl_code = request;
+	wrapper.data = param;
+
+	return ioctl (fd, USBDEVFS_IOCTL, &wrapper);
+}
+
+static void *handle_testdev (void *arg)
+{
+	struct testdev		*dev = arg;
+	int			fd, i;
+	int			status;
+
+	if ((fd = open (dev->name, O_RDWR)) < 0) {
+		perror ("can't open dev file r/w");
+		return 0;
+	}
+
+restart:
+	for (i = 0; i < TEST_CASES; i++) {
+		if (dev->test != -1 && dev->test != i)
+			continue;
+		dev->param.test_num = i;
+
+		status = usbdev_ioctl (fd, dev->ifnum,
+				USBTEST_REQUEST, &dev->param);
+		if (status < 0 && errno == EOPNOTSUPP)
+			continue;
+
+		/* FIXME need a "syslog it" option for background testing */
+
+		/* NOTE: each thread emits complete lines; no fragments! */
+		if (status < 0) {
+			char	buf [80];
+			int	err = errno;
+
+			if (strerror_r (errno, buf, sizeof buf)) {
+				snprintf (buf, sizeof buf, "error %d", err);
+				errno = err;
+			}
+			printf ("%s test %d --> %d (%s)\n",
+				dev->name, i, errno, buf);
+		} else
+			printf ("%s test %d, %4d.%.06d secs\n", dev->name, i,
+				(int) dev->param.duration.tv_sec,
+				(int) dev->param.duration.tv_usec);
+
+		fflush (stdout);
+	}
+	if (dev->forever)
+		goto restart;
+
+	close (fd);
+	return arg;
+}
+
+int main (int argc, char **argv)
+{
+	int			c;
+	struct testdev		*entry;
+	char			*device;
+	int			all = 0, forever = 0, not = 0;
+	int			test = -1 /* all */;
+	struct usbtest_param	param;
+
+	/* pick defaults that works with all speeds, without short packets.
+	 *
+	 * Best per-frame data rates:
+	 *     high speed, bulk       512 * 13 * 8 = 53248
+	 *                 interrupt 1024 *  3 * 8 = 24576
+	 *     full speed, bulk/intr   64 * 19     =  1216
+	 *                 interrupt   64 *  1     =    64
+	 *      low speed, interrupt    8 *  1     =     8
+	 */
+	param.iterations = 1000;
+	param.length = 512;
+	param.vary = 512;
+	param.sglen = 32;
+
+	/* for easy use when hotplugging */
+	device = getenv ("DEVICE");
+
+	while ((c = getopt (argc, argv, "D:ac:g:hns:t:v:")) != EOF)
+	switch (c) {
+	case 'D':	/* device, if only one */
+		device = optarg;
+		continue;
+	case 'a':	/* use all devices */
+		device = 0;
+		all = 1;
+		continue;
+	case 'c':	/* count iterations */
+		param.iterations = atoi (optarg);
+		if (param.iterations < 0)
+			goto usage;
+		continue;
+	case 'g':	/* scatter/gather entries */
+		param.sglen = atoi (optarg);
+		if (param.sglen < 0)
+			goto usage;
+		continue;
+	case 'l':	/* loop forever */
+		forever = 1;
+		continue;
+	case 'n':	/* no test running! */
+		not = 1;
+		continue;
+	case 's':	/* size of packet */
+		param.length = atoi (optarg);
+		if (param.length < 0)
+			goto usage;
+		continue;
+	case 't':	/* run just one test */
+		test = atoi (optarg);
+		if (test < 0)
+			goto usage;
+		continue;
+	case 'v':	/* vary packet size by ... */
+		param.vary = atoi (optarg);
+		if (param.vary < 0)
+			goto usage;
+		continue;
+	case '?':
+	case 'h':
+	default:
+usage:
+		fprintf (stderr, "usage: %s [-an] [-D dev]\n"
+			"\t[-c iterations]  [-t testnum]\n"
+			"\t[-s packetsize] [-g sglen] [-v vary]\n",
+			argv [0]);
+		return 1;
+	}
+	if (optind != argc)
+		goto usage;
+	if (!all && !device) {
+		fprintf (stderr, "must specify '-a' or '-D dev', "
+			"or DEVICE=/proc/bus/usb/BBB/DDD in env\n");
+		goto usage;
+	}
+
+	if ((c = open ("/proc/bus/usb/devices", O_RDONLY)) < 0) {
+		fputs ("usbfs files are missing\n", stderr);
+		return -1;
+	}
+
+	/* collect and list the test devices */
+	if (ftw ("/proc/bus/usb", find_testdev, 3) != 0) {
+		fputs ("ftw failed; is usbfs missing?\n", stderr);
+		return -1;
+	}
+
+	/* quit, run single test, or create test threads */
+	if (!testdevs && !device) {
+		fputs ("no test devices recognized\n", stderr);
+		return -1;
+	}
+	if (not)
+		return 0;
+	if (testdevs && testdevs->next == 0 && !device)
+		device = testdevs->name;
+	for (entry = testdevs; entry; entry = entry->next) {
+		int	status;
+
+		entry->param = param;
+		entry->forever = forever;
+		entry->test = test;
+
+		if (device) {
+			if (strcmp (entry->name, device))
+				continue;
+			return handle_testdev (entry) != entry;
+		}
+		status = pthread_create (&entry->thread, 0, handle_testdev, entry);
+		if (status) {
+			perror ("pthread_create");
+			continue;
+		}
+	}
+	if (device) {
+		struct testdev		dev;
+
+		/* kernel can recognize test devices we don't */
+		fprintf (stderr, "%s: %s may see only control tests\n",
+				argv [0], device);
+
+		memset (&dev, 0, sizeof dev);
+		dev.name = device;
+		dev.param = param;
+		dev.forever = forever;
+		dev.test = test;
+		return handle_testdev (&dev) != &dev;
+	}
+
+	/* wait for tests to complete */
+	for (entry = testdevs; entry; entry = entry->next) {
+		void	*retval;
+
+		if (pthread_join (entry->thread, &retval))
+			perror ("pthread_join");
+		/* testing errors discarded! */
+	}
+
+	return 0;
+}