/*
 * Xsens MT USB driver
 *
 * Copyright (C) 2013 Xsens <info@xsens.com>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License version
 *  2 as published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/uaccess.h>

#define XSENS_VID 0x2639

#define MTi_10_IMU_PID		0x0001
#define MTi_20_VRU_PID		0x0002
#define MTi_30_AHRS_PID		0x0003

#define MTi_100_IMU_PID		0x0011
#define MTi_200_VRU_PID		0x0012
#define MTi_300_AHRS_PID	0x0013

#define MTi_G_700_GPS_INS_PID	0x0017

static const struct usb_device_id id_table[] = {
	{ USB_DEVICE(XSENS_VID, MTi_10_IMU_PID) },
	{ USB_DEVICE(XSENS_VID, MTi_20_VRU_PID) },
	{ USB_DEVICE(XSENS_VID, MTi_30_AHRS_PID) },

	{ USB_DEVICE(XSENS_VID, MTi_100_IMU_PID) },
	{ USB_DEVICE(XSENS_VID, MTi_200_VRU_PID) },
	{ USB_DEVICE(XSENS_VID, MTi_300_AHRS_PID) },

	{ USB_DEVICE(XSENS_VID, MTi_G_700_GPS_INS_PID) },
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

static int xsens_mt_probe(struct usb_serial *serial,
					const struct usb_device_id *id)
{
	if (serial->interface->cur_altsetting->desc.bInterfaceNumber == 1)
		return 0;

	return -ENODEV;
}

static struct usb_serial_driver xsens_mt_device = {
	.driver = {
		.owner = THIS_MODULE,
		.name = "xsens_mt",
	},
	.id_table = id_table,
	.num_ports = 1,

	.probe = xsens_mt_probe,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&xsens_mt_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_AUTHOR("Frans Klaver <frans.klaver@xsens.com>");
MODULE_DESCRIPTION("USB-serial driver for Xsens motion trackers");
MODULE_LICENSE("GPL");
terface/io/blkif.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/xen/interface/io/blkif.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>xen</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>interface</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface/io?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>io</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>blkif.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c8f325a59cfc718d13a50fbc746ed9b415c25e92'/><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>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-02-01 17:45:02 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 21:17:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>include/xen/interface/io/blkif.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/interface/io/blkif.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/interface/io/blkif.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92&amp;id2=bf29bddf0417a4783da3b24e8c9e017ac649326f'>diff</a>)</td></tr></table>
<div class='commit-subject'>efi/fdt: Avoid FDT manipulation after ExitBootServices()</div><div class='commit-msg'>Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Riku Voipio &lt;riku.voipio@linaro.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'include/xen/interface/io/blkif.h')</div><table summary='diffstat' class='diffstat'>