/*
 * Driver for loading USB isight firmware
 *
 * Copyright (C) 2008 Matthew Garrett <mjg@redhat.com>
 *
 * 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, version 2.
 *
 * The USB isight cameras in recent Apples are roughly compatible with the USB
 * video class specification, and can be driven by uvcvideo. However, they
 * need firmware to be loaded beforehand. After firmware loading, the device
 * detaches from the USB bus and reattaches with a new device ID. It can then
 * be claimed by the uvc driver.
 *
 * The firmware is non-free and must be extracted by the user. Tools to do this
 * are available at http://bersace03.free.fr/ift/
 *
 * The isight firmware loading was reverse engineered by Johannes Berg
 * <johannes@sipsolutions.de>, and this driver is based on code by Ronald
 * Bultje <rbultje@ronald.bitfreak.net>
 */

#include <linux/usb.h>
#include <linux/firmware.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/slab.h>

static const struct usb_device_id id_table[] = {
	{USB_DEVICE(0x05ac, 0x8300)},
	{},
};

MODULE_DEVICE_TABLE(usb, id_table);

static int isight_firmware_load(struct usb_interface *intf,
				const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	int llen, len, req, ret = 0;
	const struct firmware *firmware;
	unsigned char *buf = kmalloc(50, GFP_KERNEL);
	unsigned char data[4];
	const u8 *ptr;

	if (!buf)
		return -ENOMEM;

	if (request_firmware(&firmware, "isight.fw", &dev->dev) != 0) {
		printk(KERN_ERR "Unable to load isight firmware\n");
		ret = -ENODEV;
		goto out;
	}

	ptr = firmware->data;

	buf[0] = 0x01;
	if (usb_control_msg
	    (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
	     300) != 1) {
		printk(KERN_ERR
		       "Failed to initialise isight firmware loader\n");
		ret = -ENODEV;
		goto out;
	}

	while (ptr+4 <= firmware->data+firmware->size) {
		memcpy(data, ptr, 4);
		len = (data[0] << 8 | data[1]);
		req = (data[2] << 8 | data[3]);
		ptr += 4;

		if (len == 0x8001)
			break;	/* success */
		else if (len == 0)
			continue;

		for (; len > 0; req += 50) {
			llen = min(len, 50);
			len -= llen;
			if (ptr+llen > firmware->data+firmware->size) {
				printk(KERN_ERR
				       "Malformed isight firmware");
				ret = -ENODEV;
				goto out;
			}
			memcpy(buf, ptr, llen);

			ptr += llen;

			if (usb_control_msg
			    (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, req, 0,
			     buf, llen, 300) != llen) {
				printk(KERN_ERR
				       "Failed to load isight firmware\n");
				ret = -ENODEV;
				goto out;
			}

		}
	}

	buf[0] = 0x00;
	if (usb_control_msg
	    (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
	     300) != 1) {
		printk(KERN_ERR "isight firmware loading completion failed\n");
		ret = -ENODEV;
	}

out:
	kfree(buf);
	release_firmware(firmware);
	return ret;
}

MODULE_FIRMWARE("isight.fw");

static void isight_firmware_disconnect(struct usb_interface *intf)
{
}

static struct usb_driver isight_firmware_driver = {
	.name = "isight_firmware",
	.probe = isight_firmware_load,
	.disconnect = isight_firmware_disconnect,
	.id_table = id_table,
};

module_usb_driver(isight_firmware_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
 type='hidden' name='id' value='c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 13:20:23 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 13:20:23 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ucsi.h?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>c67b42f3a3f03e68bf915f32c8f7be0b726fec1a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/misc/ucsi.h?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>9abf8c8a276cd5e8119e5c50f53afc220648008e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/misc/ucsi.h?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>drivers/usb/misc/ucsi.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ucsi.h?id=027eb72cbcf81561867a764074964e2ce9828398'>027eb72cbcf81561867a764074964e2ce9828398</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/misc/ucsi.h?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a&amp;id2=027eb72cbcf81561867a764074964e2ce9828398'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/misc/ucsi.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/misc/ucsi.h?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a&amp;id2=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull EFI fixes from Ingo Molnar:
 "Two EFI boot fixes, one for arm64 and one for x86 systems with certain
  firmware versions"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/fdt: Avoid FDT manipulation after ExitBootServices()
  x86/efi: Always map the first physical page into the EFI pagetables
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c67b42f3a3f03e68bf915f32c8f7be0b726fec1a'>Diffstat</a> (limited to 'drivers/usb/misc/ucsi.h')</div><table summary='diffstat' class='diffstat'>