#define UVC_GUID_FORMAT_YUY2A	{0x59, 0x55, 0x59, 0x32, 0x00, 0x00, 0x10, 0x00, \

				 0x00, 0x80, 0x71, 0x9b, 0x38, 0x00, 0xaa, 0x00}

	} else if (is_header && buf->buf.bytesused > 0) {

		buf->state = UVC_BUF_STATE_DONE;

		return -EAGAIN;

	}

	if (probe.dwMaxVideoFrameSize == 0)

		probe.dwMaxVideoFrameSize =

			video->streaming->format[probe.bFormatIndex - 1].

				frame[probe.bFrameIndex - 1].dwMaxVideoFrameBufferSize;

		if (dev->udev->descriptor.idVendor == 0x05ac &&

		    dev->udev->descriptor.idProduct == 0x8300) {

			uvc_printk (KERN_ERR, "Possible an Apple iSight "

				    "without firmware loaded; please read "

				    "the documentation, load the firmware "

				    "and re-load the driver.");

		}

	/* Apple iSight (built-in in Macintels) */

	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE,

	  .idVendor		= 0x05ac,

	  .idProduct		= 0x8501 },

	/* same, but without firmware loaded (will give useful warning)

	 * when the firmware is not loaded in the pre-instal step). */

	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE

				| USB_DEVICE_ID_MATCH_INT_INFO,

	  .idVendor		= 0x05ac,

	  .idProduct		= 0x8300,

	  .bInterfaceClass	= USB_CLASS_VENDOR_SPEC,

	  .bInterfaceSubClass	= 0xff,

	  .bInterfaceProtocol	= 0xff },

extract: extract.c

	gcc -g `pkg-config --cflags --libs libusb` -o extract extract.c

dist:

	rm -fr linux-uvc-${DRIVER_VERSION}

	mkdir linux-uvc-${DRIVER_VERSION}

	cp uvcvideo.[ch] Makefile extract.c linux-uvc-${DRIVER_VERSION}/

	tar -zcf linux-uvc-${DRIVER_VERSION}.tar.gz linux-uvc-${DRIVER_VERSION}

	rm -fr linux-uvc-${DRIVER_VERSION}

/*

 * Apple iSight (the one built in the screen of Macbooks) firmware loader

 * Copyright (C) 2006 Ronald S. Bultje <rbultje@ronald.bitfreak.net>

 *

 * Special thanks to Johannes Berg <johannes@sipsolutions.net> for helping

 * to find out how to load the firmware; see his website on

 * http://johannes.sipsolutions.net/MacBook/iSight for details.

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA 02110-1301, USA

 */

#include <stdlib.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <errno.h>

#include <usb.h>

#define TIMEOUT 300

static int

read_fw (struct usb_dev_handle *dev, char *filename)

{

	long long int pos;

	int fd, rd, len, req, llen, res, ret = -1;

	unsigned char data[4], rdata[1024], *ptr;

	if ((fd = open (filename, O_RDONLY)) == -1) {

		perror ("Opening file");

		return -1;

	} else if (lseek (fd, 5172, SEEK_SET) != 5172) {

		perror ("Seeking");

		close (fd);

		return -1;

	}

	if ((res = usb_control_msg (dev, 0x40, 0xA0, 0xe600, 0,

				    "\1", 1, TIMEOUT)) != 1) {

		perror ("Firmware load init failed");

		close (fd);

		return -1;

	}

	while (1) {

		if ((len = read (fd, data, 4)) != 4) {

			if (len == 0) {

				fprintf (stderr,

					 "Unexpected eos - corrupt driver?\n");

				goto end;

			} else {

				perror("Reading firmware header chunk failed");

				goto end;

			}

		}

		len = (data[0] << 8) | data[1];

		req = (data[2] << 8) | data[3];

		if (len == 0x8001)

			break; /* success */

		else if (len == 0)

			continue;

		else if (len < 0 || len >= 1024) {

			fprintf (stderr,

				 "Invalid firmware length %d, load aborted\n",

				 len);

			goto end;

		} else if (read (fd, rdata, len) != len) {

			perror ("Error reading firmware data");

			goto end;

		}

		/* upload to usb bus */

		for (ptr = rdata; len > 0; req += 50, ptr += 50) {

			llen = len > 50 ? 50 : len;

			len -= llen;

			if ((res = usb_control_msg (dev, 0x40, 0xA0, req, 0,

						    (char *) ptr, llen,

						    TIMEOUT)) != llen) {

				fprintf (stderr,

					 "firmware load req=0x%x failed: %s\n",

					 req, strerror (errno));

				goto end;

			}

		}

	}

	ret = 0;

end:

	if ((res = usb_control_msg (dev, 0x40, 0xA0, 0xe600, 0,

				    "\0", 1, TIMEOUT)) != 1) {

		perror ("Firmware finish-up failed");

		ret = -1;

	}

	close (fd);

	return ret;

}

static int

probe_dev (struct usb_device *dev, char *fw_filename)

{

	int n, total = 0;

	if (dev->descriptor.idVendor == 0x05ac &&

	    dev->descriptor.idProduct == 0x8300 &&

	    dev->descriptor.bDeviceClass == 0xff &&

	    dev->descriptor.bDeviceSubClass == 0xff &&

	    dev->descriptor.bDeviceProtocol == 0xff) {

		usb_dev_handle *h;

		/* load firmware */

		if (!(h = usb_open (dev))) {

			perror ("Opening iSight");

			return;

		}

		printf ("Loading firmware for iSight...\n");

		if (read_fw (h, fw_filename) == 0) {

			printf ("done\n");

			total++;

		}

		usb_close (h);

	} else if (dev->descriptor.idVendor == 0x05ac &&

		   dev->descriptor.idProduct == 0x8501) {

		printf ("Apple iSight with firmware already loaded found\n");

		total++;

	}

	for (n = 0; n < dev->num_children; n++)

		total += probe_dev (dev->children[n], fw_filename);

	return total;

}

int

main (int argc, char *argv[])

{

	int n, m, found = 0;

	char command[1024];

	struct usb_bus *bus;

	struct usb_device *dev;

	if (argc != 2) {

		fprintf(stderr, "Usage: %s <firmware file>\n", argv[0]);

		fprintf(stderr, "Firmware can usually be found on your Mac "

			"partition in /System/Library/Extensions/"

			"IOUSBFamily.kext/Contents/PlugIns/"

			"AppleUSBVideoSupport.kext/Contents/MacOS/"

			"AppleUSBVideoSupport\n");

		return -1;

	}

	/* check sha1sum on firmware, to prevent loading crap into the

	 * iSight and thus possibly damaging it. */

	snprintf (command, sizeof (command) - 1,

		  "test \"x`sha1sum %s`\" == \"x%s  %s\" &> /dev/null",

		  argv[1], "86430c04f9b67c5c3d84409138a7679827025ec2",

		  argv[1]);

	if (system (command) != 0) {

		fprintf (stderr, "Sha1sum check on firmware file failed\n");

		return -1;

	}

	/* init usb */

	usb_init ();

	if (usb_find_busses () == 0) {

		fprintf (stderr, "No USB busses found\n");

		return -1;

	} else if (usb_find_devices () == 0) {

		fprintf (stderr, "No USB devices found\n");

		return -1;

	}

	/* find iSight */

	for (bus = usb_busses; bus != NULL; bus = bus->next) {

		if (bus->devices != NULL) {

			for (dev = bus->devices; dev != NULL;

			     dev = dev->next) {

				found += probe_dev (dev, argv[1]);

			}

		}

	}

	if (found == 0) {

		fprintf (stderr, "No Apple iSight found!\n");

		return -1;

	}

	return 0;

}