Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 1978 insertions, 0 deletions

diff --git a/drivers/usb/image/Kconfig b/drivers/usb/image/Kconfig
new file mode 100644
index 000000000..a65c638e7
--- /dev/null
+++ b/drivers/usb/image/Kconfig
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# USB Imaging devices configuration
+#
+comment "USB Imaging devices"
+
+config USB_MDC800
+	tristate "USB Mustek MDC800 Digital Camera support"
+	help
+	  Say Y here if you want to connect this type of still camera to
+	  your computer's USB port. This driver can be used with gphoto 0.4.3
+	  and higher (look at <http://www.gphoto.org/>).
+	  To use it create a device node with "mknod /dev/mustek c 180 32" and
+	  configure it in your software.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mdc800.
+
+config USB_MICROTEK
+	tristate "Microtek X6USB scanner support"
+	depends on SCSI
+	help
+	  Say Y here if you want support for the Microtek X6USB and
+	  possibly the Phantom 336CX, Phantom C6 and ScanMaker V6U(S)L.
+	  Support for anything but the X6 is experimental.
+	  Please report failures and successes.
+	  The scanner will appear as a scsi generic device to the rest
+	  of the system. Scsi support is required.
+	  This driver can be compiled as a module, called microtek.
diff --git a/drivers/usb/image/Makefile b/drivers/usb/image/Makefile
new file mode 100644
index 000000000..8997c81ba
--- /dev/null
+++ b/drivers/usb/image/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for USB Image drivers
+#
+
+obj-$(CONFIG_USB_MDC800)	+= mdc800.o
+obj-$(CONFIG_USB_MICROTEK)	+= microtek.o
diff --git a/drivers/usb/image/mdc800.c b/drivers/usb/image/mdc800.c
new file mode 100644
index 000000000..67f098579
--- /dev/null
+++ b/drivers/usb/image/mdc800.c
@@ -0,0 +1,1077 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
+ */
+
+
+/*
+ *	USB-Kernel Driver for the Mustek MDC800 Digital Camera
+ *	(c) 1999/2000 Henning Zabel <henning@uni-paderborn.de>
+ *
+ *
+ * The driver brings the USB functions of the MDC800 to Linux.
+ * To use the Camera you must support the USB Protocol of the camera
+ * to the Kernel Node.
+ * The Driver uses a misc device Node. Create it with :
+ * mknod /dev/mustek c 180 32
+ *
+ * The driver supports only one camera.
+ * 
+ * Fix: mdc800 used sleep_on and slept with io_lock held.
+ * Converted sleep_on to waitqueues with schedule_timeout and made io_lock
+ * a semaphore from a spinlock.
+ * by Oliver Neukum <oliver@neukum.name>
+ * (02/12/2001)
+ * 
+ * Identify version on module load.
+ * (08/04/2001) gb
+ *
+ * version 0.7.5
+ * Fixed potential SMP races with Spinlocks.
+ * Thanks to Oliver Neukum <oliver@neukum.name> who 
+ * noticed the race conditions.
+ * (30/10/2000)
+ *
+ * Fixed: Setting urb->dev before submitting urb.
+ * by Greg KH <greg@kroah.com>
+ * (13/10/2000)
+ *
+ * version 0.7.3
+ * bugfix : The mdc800->state field gets set to READY after the
+ * disconnect function sets it to NOT_CONNECTED. This makes the
+ * driver running like the camera is connected and causes some
+ * hang ups.
+ *
+ * version 0.7.1
+ * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload
+ * problems when compiled as Module.
+ * (04/04/2000)
+ *
+ * The mdc800 driver gets assigned the USB Minor 32-47. The Registration
+ * was updated to use these values.
+ * (26/03/2000)
+ *
+ * The Init und Exit Module Function are updated.
+ * (01/03/2000)
+ *
+ * version 0.7.0
+ * Rewrite of the driver : The driver now uses URB's. The old stuff
+ * has been removed.
+ *
+ * version 0.6.0
+ * Rewrite of this driver: The Emulation of the rs232 protocoll
+ * has been removed from the driver. A special executeCommand function
+ * for this driver is included to gphoto.
+ * The driver supports two kind of communication to bulk endpoints.
+ * Either with the dev->bus->ops->bulk... or with callback function.
+ * (09/11/1999)
+ *
+ * version 0.5.0:
+ * first Version that gets a version number. Most of the needed
+ * functions work.
+ * (20/10/1999)
+ */
+
+#include <linux/sched/signal.h>
+#include <linux/signal.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/random.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+
+#include <linux/usb.h>
+#include <linux/fs.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.7.5 (30/10/2000)"
+#define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>"
+#define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera"
+
+/* Vendor and Product Information */
+#define MDC800_VENDOR_ID 	0x055f
+#define MDC800_PRODUCT_ID	0xa800
+
+/* Timeouts (msec) */
+#define TO_DOWNLOAD_GET_READY		1500
+#define TO_DOWNLOAD_GET_BUSY		1500
+#define TO_WRITE_GET_READY		1000
+#define TO_DEFAULT_COMMAND		5000
+#define TO_READ_FROM_IRQ 		TO_DEFAULT_COMMAND
+#define TO_GET_READY			TO_DEFAULT_COMMAND
+
+/* Minor Number of the device (create with mknod /dev/mustek c 180 32) */
+#define MDC800_DEVICE_MINOR_BASE 32
+
+
+/**************************************************************************
+	Data and structs
+***************************************************************************/
+
+
+typedef enum {
+	NOT_CONNECTED, READY, WORKING, DOWNLOAD
+} mdc800_state;
+
+
+/* Data for the driver */
+struct mdc800_data
+{
+	struct usb_device *	dev;			// Device Data
+	mdc800_state 		state;
+
+	unsigned int		endpoint [4];
+
+	struct urb *		irq_urb;
+	wait_queue_head_t	irq_wait;
+	int			irq_woken;
+	char*			irq_urb_buffer;
+
+	int			camera_busy;          // is camera busy ?
+	int 			camera_request_ready; // Status to synchronize with irq
+	char 			camera_response [8];  // last Bytes send after busy
+
+	struct urb *   		write_urb;
+	char*			write_urb_buffer;
+	wait_queue_head_t	write_wait;
+	int			written;
+
+
+	struct urb *   		download_urb;
+	char*			download_urb_buffer;
+	wait_queue_head_t	download_wait;
+	int			downloaded;
+	int			download_left;		// Bytes left to download ?
+
+
+	/* Device Data */
+	char			out [64];	// Answer Buffer
+	int 			out_ptr;	// Index to the first not readen byte
+	int			out_count;	// Bytes in the buffer
+
+	int			open;		// Camera device open ?
+	struct mutex		io_lock;	// IO -lock
+
+	char 			in [8];		// Command Input Buffer
+	int  			in_count;
+
+	int			pic_index;	// Cache for the Imagesize (-1 for nothing cached )
+	int			pic_len;
+	int			minor;
+};
+
+
+/* Specification of the Endpoints */
+static struct usb_endpoint_descriptor mdc800_ed [4] =
+{
+	{ 
+		.bLength = 		0,
+		.bDescriptorType =	0,
+		.bEndpointAddress =	0x01,
+		.bmAttributes = 	0x02,
+		.wMaxPacketSize =	cpu_to_le16(8),
+		.bInterval = 		0,
+		.bRefresh = 		0,
+		.bSynchAddress = 	0,
+	},
+	{
+		.bLength = 		0,
+		.bDescriptorType = 	0,
+		.bEndpointAddress = 	0x82,
+		.bmAttributes = 	0x03,
+		.wMaxPacketSize = 	cpu_to_le16(8),
+		.bInterval = 		0,
+		.bRefresh = 		0,
+		.bSynchAddress = 	0,
+	},
+	{
+		.bLength = 		0,
+		.bDescriptorType = 	0,
+		.bEndpointAddress = 	0x03,
+		.bmAttributes = 	0x02,
+		.wMaxPacketSize = 	cpu_to_le16(64),
+		.bInterval = 		0,
+		.bRefresh = 		0,
+		.bSynchAddress = 	0,
+	},
+	{
+		.bLength = 		0,
+		.bDescriptorType = 	0,
+		.bEndpointAddress = 	0x84,
+		.bmAttributes = 	0x02,
+		.wMaxPacketSize = 	cpu_to_le16(64),
+		.bInterval = 		0,
+		.bRefresh = 		0,
+		.bSynchAddress = 	0,
+	},
+};
+
+/* The Variable used by the driver */
+static struct mdc800_data* mdc800;
+
+
+/***************************************************************************
+	The USB Part of the driver
+****************************************************************************/
+
+static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b)
+{
+	return (
+		   ( a->bEndpointAddress == b->bEndpointAddress )
+		&& ( a->bmAttributes     == b->bmAttributes     )
+		&& ( a->wMaxPacketSize   == b->wMaxPacketSize   )
+	);
+}
+
+
+/*
+ * Checks whether the camera responds busy
+ */
+static int mdc800_isBusy (char* ch)
+{
+	int i=0;
+	while (i<8)
+	{
+		if (ch [i] != (char)0x99)
+			return 0;
+		i++;
+	}
+	return 1;
+}
+
+
+/*
+ * Checks whether the Camera is ready
+ */
+static int mdc800_isReady (char *ch)
+{
+	int i=0;
+	while (i<8)
+	{
+		if (ch [i] != (char)0xbb)
+			return 0;
+		i++;
+	}
+	return 1;
+}
+
+
+
+/*
+ * USB IRQ Handler for InputLine
+ */
+static void mdc800_usb_irq (struct urb *urb)
+{
+	int data_received=0, wake_up;
+	unsigned char* b=urb->transfer_buffer;
+	struct mdc800_data* mdc800=urb->context;
+	struct device *dev = &mdc800->dev->dev;
+	int status = urb->status;
+
+	if (status >= 0) {
+		if (mdc800_isBusy (b))
+		{
+			if (!mdc800->camera_busy)
+			{
+				mdc800->camera_busy=1;
+				dev_dbg(dev, "gets busy\n");
+			}
+		}
+		else
+		{
+			if (mdc800->camera_busy && mdc800_isReady (b))
+			{
+				mdc800->camera_busy=0;
+				dev_dbg(dev, "gets ready\n");
+			}
+		}
+		if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
+		{
+			/* Store Data in camera_answer field */
+			dev_dbg(dev, "%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
+
+			memcpy (mdc800->camera_response,b,8);
+			data_received=1;
+		}
+	}
+	wake_up= ( mdc800->camera_request_ready > 0 )
+		&&
+		(
+			((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
+		||
+			((mdc800->camera_request_ready == 2) && data_received)
+		||
+			((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
+		||
+			(status < 0)
+		);
+
+	if (wake_up)
+	{
+		mdc800->camera_request_ready=0;
+		mdc800->irq_woken=1;
+		wake_up (&mdc800->irq_wait);
+	}
+}
+
+
+/*
+ * Waits a while until the irq responds that camera is ready
+ *
+ *  mode : 0: Wait for camera gets ready
+ *         1: Wait for receiving data
+ *         2: Wait for camera gets busy
+ *
+ * msec: Time to wait
+ */
+static int mdc800_usb_waitForIRQ (int mode, int msec)
+{
+	mdc800->camera_request_ready=1+mode;
+
+	wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken,
+			   msecs_to_jiffies(msec));
+	mdc800->irq_woken = 0;
+
+	if (mdc800->camera_request_ready>0)
+	{
+		mdc800->camera_request_ready=0;
+		dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n");
+		return -1;
+	}
+	
+	if (mdc800->state == NOT_CONNECTED)
+	{
+		printk(KERN_WARNING "mdc800: Camera gets disconnected "
+		       "during waiting for irq.\n");
+		mdc800->camera_request_ready=0;
+		return -2;
+	}
+	
+	return 0;
+}
+
+
+/*
+ * The write_urb callback function
+ */
+static void mdc800_usb_write_notify (struct urb *urb)
+{
+	struct mdc800_data* mdc800=urb->context;
+	int status = urb->status;
+
+	if (status != 0)
+		dev_err(&mdc800->dev->dev,
+			"writing command fails (status=%i)\n", status);
+	else
+		mdc800->state=READY;
+	mdc800->written = 1;
+	wake_up (&mdc800->write_wait);
+}
+
+
+/*
+ * The download_urb callback function
+ */
+static void mdc800_usb_download_notify (struct urb *urb)
+{
+	struct mdc800_data* mdc800=urb->context;
+	int status = urb->status;
+
+	if (status == 0) {
+		/* Fill output buffer with these data */
+		memcpy (mdc800->out,  urb->transfer_buffer, 64);
+		mdc800->out_count=64;
+		mdc800->out_ptr=0;
+		mdc800->download_left-=64;
+		if (mdc800->download_left == 0)
+		{
+			mdc800->state=READY;
+		}
+	} else {
+		dev_err(&mdc800->dev->dev,
+			"request bytes fails (status:%i)\n", status);
+	}
+	mdc800->downloaded = 1;
+	wake_up (&mdc800->download_wait);
+}
+
+
+/***************************************************************************
+	Probing for the Camera
+ ***************************************************************************/
+
+static struct usb_driver mdc800_usb_driver;
+static const struct file_operations mdc800_device_ops;
+static struct usb_class_driver mdc800_class = {
+	.name =		"mdc800%d",
+	.fops =		&mdc800_device_ops,
+	.minor_base =	MDC800_DEVICE_MINOR_BASE,
+};
+
+
+/*
+ * Callback to search the Mustek MDC800 on the USB Bus
+ */
+static int mdc800_usb_probe (struct usb_interface *intf,
+			       const struct usb_device_id *id)
+{
+	int i,j;
+	struct usb_host_interface *intf_desc;
+	struct usb_device *dev = interface_to_usbdev (intf);
+	int irq_interval=0;
+	int retval;
+
+	dev_dbg(&intf->dev, "(%s) called.\n", __func__);
+
+
+	if (mdc800->dev != NULL)
+	{
+		dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
+		return -ENODEV;
+	}
+
+	if (dev->descriptor.bNumConfigurations != 1)
+	{
+		dev_err(&intf->dev,
+			"probe fails -> wrong Number of Configuration\n");
+		return -ENODEV;
+	}
+	intf_desc = intf->cur_altsetting;
+
+	if (
+			( intf_desc->desc.bInterfaceClass != 0xff )
+		||	( intf_desc->desc.bInterfaceSubClass != 0 )
+		|| ( intf_desc->desc.bInterfaceProtocol != 0 )
+		|| ( intf_desc->desc.bNumEndpoints != 4)
+	)
+	{
+		dev_err(&intf->dev, "probe fails -> wrong Interface\n");
+		return -ENODEV;
+	}
+
+	/* Check the Endpoints */
+	for (i=0; i<4; i++)
+	{
+		mdc800->endpoint[i]=-1;
+		for (j=0; j<4; j++)
+		{
+			if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
+			{
+				mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
+				if (i==1)
+				{
+					irq_interval=intf_desc->endpoint [j].desc.bInterval;
+				}
+			}
+		}
+		if (mdc800->endpoint[i] == -1)
+		{
+			dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n");
+			return -ENODEV;
+		}
+	}
+
+
+	dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n");
+
+	mutex_lock(&mdc800->io_lock);
+
+	retval = usb_register_dev(intf, &mdc800_class);
+	if (retval) {
+		dev_err(&intf->dev, "Not able to get a minor for this device.\n");
+		mutex_unlock(&mdc800->io_lock);
+		return -ENODEV;
+	}
+
+	mdc800->dev=dev;
+	mdc800->open=0;
+
+	/* Setup URB Structs */
+	usb_fill_int_urb (
+		mdc800->irq_urb,
+		mdc800->dev,
+		usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
+		mdc800->irq_urb_buffer,
+		8,
+		mdc800_usb_irq,
+		mdc800,
+		irq_interval
+	);
+
+	usb_fill_bulk_urb (
+		mdc800->write_urb,
+		mdc800->dev,
+		usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
+		mdc800->write_urb_buffer,
+		8,
+		mdc800_usb_write_notify,
+		mdc800
+	);
+
+	usb_fill_bulk_urb (
+		mdc800->download_urb,
+		mdc800->dev,
+		usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
+		mdc800->download_urb_buffer,
+		64,
+		mdc800_usb_download_notify,
+		mdc800
+	);
+
+	mdc800->state=READY;
+
+	mutex_unlock(&mdc800->io_lock);
+	
+	usb_set_intfdata(intf, mdc800);
+	return 0;
+}
+
+
+/*
+ * Disconnect USB device (maybe the MDC800)
+ */
+static void mdc800_usb_disconnect (struct usb_interface *intf)
+{
+	struct mdc800_data* mdc800 = usb_get_intfdata(intf);
+
+	dev_dbg(&intf->dev, "(%s) called\n", __func__);
+
+	if (mdc800) {
+		if (mdc800->state == NOT_CONNECTED)
+			return;
+
+		usb_deregister_dev(intf, &mdc800_class);
+
+		/* must be under lock to make sure no URB
+		   is submitted after usb_kill_urb() */
+		mutex_lock(&mdc800->io_lock);
+		mdc800->state=NOT_CONNECTED;
+
+		usb_kill_urb(mdc800->irq_urb);
+		usb_kill_urb(mdc800->write_urb);
+		usb_kill_urb(mdc800->download_urb);
+		mutex_unlock(&mdc800->io_lock);
+
+		mdc800->dev = NULL;
+		usb_set_intfdata(intf, NULL);
+	}
+	dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n");
+}
+
+
+/***************************************************************************
+	The Misc device Part (file_operations)
+****************************************************************************/
+
+/*
+ * This Function calc the Answersize for a command.
+ */
+static int mdc800_getAnswerSize (char command)
+{
+	switch ((unsigned char) command)
+	{
+		case 0x2a:
+		case 0x49:
+		case 0x51:
+		case 0x0d:
+		case 0x20:
+		case 0x07:
+		case 0x01:
+		case 0x25:
+		case 0x00:
+			return 8;
+
+		case 0x05:
+		case 0x3e:
+			return mdc800->pic_len;
+
+		case 0x09:
+			return 4096;
+
+		default:
+			return 0;
+	}
+}
+
+
+/*
+ * Init the device: (1) alloc mem (2) Increase MOD Count ..
+ */
+static int mdc800_device_open (struct inode* inode, struct file *file)
+{
+	int retval=0;
+	int errn=0;
+
+	mutex_lock(&mdc800->io_lock);
+	
+	if (mdc800->state == NOT_CONNECTED)
+	{
+		errn=-EBUSY;
+		goto error_out;
+	}
+	if (mdc800->open)
+	{
+		errn=-EBUSY;
+		goto error_out;
+	}
+
+	mdc800->in_count=0;
+	mdc800->out_count=0;
+	mdc800->out_ptr=0;
+	mdc800->pic_index=0;
+	mdc800->pic_len=-1;
+	mdc800->download_left=0;
+
+	mdc800->camera_busy=0;
+	mdc800->camera_request_ready=0;
+
+	retval=0;
+	mdc800->irq_urb->dev = mdc800->dev;
+	retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
+	if (retval) {
+		dev_err(&mdc800->dev->dev,
+			"request USB irq fails (submit_retval=%i).\n", retval);
+		errn = -EIO;
+		goto error_out;
+	}
+
+	mdc800->open=1;
+	dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n");
+
+error_out:
+	mutex_unlock(&mdc800->io_lock);
+	return errn;
+}
+
+
+/*
+ * Close the Camera and release Memory
+ */
+static int mdc800_device_release (struct inode* inode, struct file *file)
+{
+	int retval=0;
+
+	mutex_lock(&mdc800->io_lock);
+	if (mdc800->open && (mdc800->state != NOT_CONNECTED))
+	{
+		usb_kill_urb(mdc800->irq_urb);
+		usb_kill_urb(mdc800->write_urb);
+		usb_kill_urb(mdc800->download_urb);
+		mdc800->open=0;
+	}
+	else
+	{
+		retval=-EIO;
+	}
+
+	mutex_unlock(&mdc800->io_lock);
+	return retval;
+}
+
+
+/*
+ * The Device read callback Function
+ */
+static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
+{
+	size_t left=len, sts=len; /* single transfer size */
+	char __user *ptr = buf;
+	int retval;
+
+	mutex_lock(&mdc800->io_lock);
+	if (mdc800->state == NOT_CONNECTED)
+	{
+		mutex_unlock(&mdc800->io_lock);
+		return -EBUSY;
+	}
+	if (mdc800->state == WORKING)
+	{
+		printk(KERN_WARNING "mdc800: Illegal State \"working\""
+		       "reached during read ?!\n");
+		mutex_unlock(&mdc800->io_lock);
+		return -EBUSY;
+	}
+	if (!mdc800->open)
+	{
+		mutex_unlock(&mdc800->io_lock);
+		return -EBUSY;
+	}
+
+	while (left)
+	{
+		if (signal_pending (current)) 
+		{
+			mutex_unlock(&mdc800->io_lock);
+			return -EINTR;
+		}
+
+		sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
+
+		if (sts <= 0)
+		{
+			/* Too less Data in buffer */
+			if (mdc800->state == DOWNLOAD)
+			{
+				mdc800->out_count=0;
+				mdc800->out_ptr=0;
+
+				/* Download -> Request new bytes */
+				mdc800->download_urb->dev = mdc800->dev;
+				retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
+				if (retval) {
+					dev_err(&mdc800->dev->dev,
+						"Can't submit download urb "
+						"(retval=%i)\n", retval);
+					mutex_unlock(&mdc800->io_lock);
+					return len-left;
+				}
+				wait_event_timeout(mdc800->download_wait,
+				     mdc800->downloaded,
+				     msecs_to_jiffies(TO_DOWNLOAD_GET_READY));
+				mdc800->downloaded = 0;
+				if (mdc800->download_urb->status != 0)
+				{
+					dev_err(&mdc800->dev->dev,
+						"request download-bytes fails "
+						"(status=%i)\n",
+						mdc800->download_urb->status);
+					mutex_unlock(&mdc800->io_lock);
+					return len-left;
+				}
+			}
+			else
+			{
+				/* No more bytes -> that's an error*/
+				mutex_unlock(&mdc800->io_lock);
+				return -EIO;
+			}
+		}
+		else
+		{
+			/* Copy Bytes */
+			if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
+						sts)) {
+				mutex_unlock(&mdc800->io_lock);
+				return -EFAULT;
+			}
+			ptr+=sts;
+			left-=sts;
+			mdc800->out_ptr+=sts;
+		}
+	}
+
+	mutex_unlock(&mdc800->io_lock);
+	return len-left;
+}
+
+
+/*
+ * The Device write callback Function
+ * If a 8Byte Command is received, it will be send to the camera.
+ * After this the driver initiates the request for the answer or
+ * just waits until the camera becomes ready.
+ */
+static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
+{
+	size_t i=0;
+	int retval;
+
+	mutex_lock(&mdc800->io_lock);
+	if (mdc800->state != READY)
+	{
+		mutex_unlock(&mdc800->io_lock);
+		return -EBUSY;
+	}
+	if (!mdc800->open )
+	{
+		mutex_unlock(&mdc800->io_lock);
+		return -EBUSY;
+	}
+
+	while (i<len)
+	{
+		unsigned char c;
+		if (signal_pending (current)) 
+		{
+			mutex_unlock(&mdc800->io_lock);
+			return -EINTR;
+		}
+		
+		if(get_user(c, buf+i))
+		{
+			mutex_unlock(&mdc800->io_lock);
+			return -EFAULT;
+		}
+
+		/* check for command start */
+		if (c == 0x55)
+		{
+			mdc800->in_count=0;
+			mdc800->out_count=0;
+			mdc800->out_ptr=0;
+			mdc800->download_left=0;
+		}
+
+		/* save command byte */
+		if (mdc800->in_count < 8)
+		{
+			mdc800->in[mdc800->in_count] = c;
+			mdc800->in_count++;
+		}
+		else
+		{
+			mutex_unlock(&mdc800->io_lock);
+			return -EIO;
+		}
+
+		/* Command Buffer full ? -> send it to camera */
+		if (mdc800->in_count == 8)
+		{
+			int answersize;
+
+			if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
+			{
+				dev_err(&mdc800->dev->dev,
+					"Camera didn't get ready.\n");
+				mutex_unlock(&mdc800->io_lock);
+				return -EIO;
+			}
+
+			answersize=mdc800_getAnswerSize (mdc800->in[1]);
+
+			mdc800->state=WORKING;
+			memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8);
+			mdc800->write_urb->dev = mdc800->dev;
+			retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
+			if (retval) {
+				dev_err(&mdc800->dev->dev,
+					"submitting write urb fails "
+					"(retval=%i)\n", retval);
+				mutex_unlock(&mdc800->io_lock);
+				return -EIO;
+			}
+			wait_event_timeout(mdc800->write_wait, mdc800->written,
+					msecs_to_jiffies(TO_WRITE_GET_READY));
+			mdc800->written = 0;
+			if (mdc800->state == WORKING)
+			{
+				usb_kill_urb(mdc800->write_urb);
+				mutex_unlock(&mdc800->io_lock);
+				return -EIO;
+			}
+
+			switch ((unsigned char) mdc800->in[1])
+			{
+				case 0x05: /* Download Image */
+				case 0x3e: /* Take shot in Fine Mode (WCam Mode) */
+					if (mdc800->pic_len < 0)
+					{
+						dev_err(&mdc800->dev->dev,
+							"call 0x07 before "
+							"0x05,0x3e\n");
+						mdc800->state=READY;
+						mutex_unlock(&mdc800->io_lock);
+						return -EIO;
+					}
+					mdc800->pic_len=-1;
+					fallthrough;
+
+				case 0x09: /* Download Thumbnail */
+					mdc800->download_left=answersize+64;
+					mdc800->state=DOWNLOAD;
+					mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
+					break;
+
+
+				default:
+					if (answersize)
+					{
+
+						if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
+						{
+							dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n");
+							mutex_unlock(&mdc800->io_lock);
+							return -EIO;
+						}
+
+						/* Write dummy data, (this is ugly but part of the USB Protocol */
+						/* if you use endpoint 1 as bulk and not as irq) */
+						memcpy (mdc800->out, mdc800->camera_response,8);
+
+						/* This is the interpreted answer */
+						memcpy (&mdc800->out[8], mdc800->camera_response,8);
+
+						mdc800->out_ptr=0;
+						mdc800->out_count=16;
+
+						/* Cache the Imagesize, if command was getImageSize */
+						if (mdc800->in [1] == (char) 0x07)
+						{
+							mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
+
+							dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len);
+						}
+
+					}
+					else
+					{
+						if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
+						{
+							dev_err(&mdc800->dev->dev, "Command Timeout.\n");
+							mutex_unlock(&mdc800->io_lock);
+							return -EIO;
+						}
+					}
+					mdc800->state=READY;
+					break;
+			}
+		}
+		i++;
+	}
+	mutex_unlock(&mdc800->io_lock);
+	return i;
+}
+
+
+/***************************************************************************
+	Init and Cleanup this driver (Structs and types)
+****************************************************************************/
+
+/* File Operations of this drivers */
+static const struct file_operations mdc800_device_ops =
+{
+	.owner =	THIS_MODULE,
+	.read =		mdc800_device_read,
+	.write =	mdc800_device_write,
+	.open =		mdc800_device_open,
+	.release =	mdc800_device_release,
+	.llseek =	noop_llseek,
+};
+
+
+
+static const struct usb_device_id mdc800_table[] = {
+	{ USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
+	{ }						/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, mdc800_table);
+/*
+ * USB Driver Struct for this device
+ */
+static struct usb_driver mdc800_usb_driver =
+{
+	.name =		"mdc800",
+	.probe =	mdc800_usb_probe,
+	.disconnect =	mdc800_usb_disconnect,
+	.id_table =	mdc800_table
+};
+
+
+
+/************************************************************************
+	Init and Cleanup this driver (Main Functions)
+*************************************************************************/
+
+static int __init usb_mdc800_init (void)
+{
+	int retval = -ENODEV;
+	/* Allocate Memory */
+	mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
+	if (!mdc800)
+		goto cleanup_on_fail;
+
+	mdc800->dev = NULL;
+	mdc800->state=NOT_CONNECTED;
+	mutex_init (&mdc800->io_lock);
+
+	init_waitqueue_head (&mdc800->irq_wait);
+	init_waitqueue_head (&mdc800->write_wait);
+	init_waitqueue_head (&mdc800->download_wait);
+
+	mdc800->irq_woken = 0;
+	mdc800->downloaded = 0;
+	mdc800->written = 0;
+
+	mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
+	if (!mdc800->irq_urb_buffer)
+		goto cleanup_on_fail;
+	mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
+	if (!mdc800->write_urb_buffer)
+		goto cleanup_on_fail;
+	mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
+	if (!mdc800->download_urb_buffer)
+		goto cleanup_on_fail;
+
+	mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
+	if (!mdc800->irq_urb)
+		goto cleanup_on_fail;
+	mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
+	if (!mdc800->download_urb)
+		goto cleanup_on_fail;
+	mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
+	if (!mdc800->write_urb)
+		goto cleanup_on_fail;
+
+	/* Register the driver */
+	retval = usb_register(&mdc800_usb_driver);
+	if (retval)
+		goto cleanup_on_fail;
+
+	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+	       DRIVER_DESC "\n");
+
+	return 0;
+
+	/* Clean driver up, when something fails */
+
+cleanup_on_fail:
+
+	if (mdc800 != NULL)
+	{
+		printk(KERN_ERR "mdc800: can't alloc memory!\n");
+
+		kfree(mdc800->download_urb_buffer);
+		kfree(mdc800->write_urb_buffer);
+		kfree(mdc800->irq_urb_buffer);
+
+		usb_free_urb(mdc800->write_urb);
+		usb_free_urb(mdc800->download_urb);
+		usb_free_urb(mdc800->irq_urb);
+
+		kfree (mdc800);
+	}
+	mdc800 = NULL;
+	return retval;
+}
+
+
+static void __exit usb_mdc800_cleanup (void)
+{
+	usb_deregister (&mdc800_usb_driver);
+
+	usb_free_urb (mdc800->irq_urb);
+	usb_free_urb (mdc800->download_urb);
+	usb_free_urb (mdc800->write_urb);
+
+	kfree (mdc800->irq_urb_buffer);
+	kfree (mdc800->write_urb_buffer);
+	kfree (mdc800->download_urb_buffer);
+
+	kfree (mdc800);
+	mdc800 = NULL;
+}
+
+module_init (usb_mdc800_init);
+module_exit (usb_mdc800_cleanup);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/usb/image/microtek.c b/drivers/usb/image/microtek.c
new file mode 100644
index 000000000..874ea4b54
--- /dev/null
+++ b/drivers/usb/image/microtek.c
@@ -0,0 +1,810 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others.
+ *
+ * (C) Copyright 2000 John Fremlin <vii@penguinpowered.com>
+ * (C) Copyright 2000 Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
+ *
+ * Parts shamelessly stolen from usb-storage and copyright by their
+ * authors. Thanks to Matt Dharm for giving us permission!
+ *
+ * This driver implements a SCSI host controller driver and a USB
+ * device driver. To avoid confusion, all the USB related stuff is
+ * prefixed by mts_usb_ and all the SCSI stuff by mts_scsi_.
+ *
+ * Microtek (www.microtek.com) did not release the specifications for
+ * their USB protocol to us, so we had to reverse engineer them. We
+ * don't know for which models they are valid.
+ *
+ * The X6 USB has three bulk endpoints, one output (0x1) down which
+ * commands and outgoing data are sent, and two input: 0x82 from which
+ * normal data is read from the scanner (in packets of maximum 32
+ * bytes) and from which the status byte is read, and 0x83 from which
+ * the results of a scan (or preview) are read in up to 64 * 1024 byte
+ * chunks by the Windows driver. We don't know how much it is possible
+ * to read at a time from 0x83.
+ *
+ * It seems possible to read (with URB transfers) everything from 0x82
+ * in one go, without bothering to read in 32 byte chunks.
+ *
+ * There seems to be an optimisation of a further READ implicit if
+ * you simply read from 0x83.
+ *
+ * Guessed protocol:
+ *
+ *	Send raw SCSI command to EP 0x1
+ *
+ *	If there is data to receive:
+ *		If the command was READ datatype=image:
+ *			Read a lot of data from EP 0x83
+ *		Else:
+ *			Read data from EP 0x82
+ *	Else:
+ *		If there is data to transmit:
+ *			Write it to EP 0x1
+ *
+ *	Read status byte from EP 0x82
+ *
+ * References:
+ *
+ * The SCSI command set for the scanner is available from
+ *	ftp://ftp.microtek.com/microtek/devpack/
+ *
+ * Microtek NV sent us a more up to date version of the document. If
+ * you want it, just send mail.
+ *
+ * Status:
+ *
+ *	Untested with multiple scanners.
+ *	Untested on SMP.
+ *	Untested on a bigendian machine.
+ *
+ * History:
+ *
+ *	20000417 starting history
+ *	20000417 fixed load oops
+ *	20000417 fixed unload oops
+ *	20000419 fixed READ IMAGE detection
+ *	20000424 started conversion to use URBs
+ *	20000502 handled short transfers as errors
+ *	20000513 rename and organisation of functions (john)
+ *	20000513 added IDs for all products supported by Windows driver (john)
+ *	20000514 Rewrote mts_scsi_queuecommand to use URBs (john)
+ *	20000514 Version 0.0.8j
+ *      20000514 Fix reporting of non-existent devices to SCSI layer (john)
+ *	20000514 Added MTS_DEBUG_INT (john)
+ *	20000514 Changed "usb-microtek" to "microtek" for consistency (john)
+ *	20000514 Stupid bug fixes (john)
+ *	20000514 Version 0.0.9j
+ *	20000515 Put transfer context and URB in mts_desc (john)
+ *	20000515 Added prelim turn off debugging support (john)
+ *	20000515 Version 0.0.10j
+ *      20000515 Fixed up URB allocation (clear URB on alloc) (john)
+ *      20000515 Version 0.0.11j
+ *	20000516 Removed unnecessary spinlock in mts_transfer_context (john)
+ *	20000516 Removed unnecessary up on instance lock in mts_remove_nolock (john)
+ *	20000516 Implemented (badly) scsi_abort (john)
+ *	20000516 Version 0.0.12j
+ *      20000517 Hopefully removed mts_remove_nolock quasideadlock (john)
+ *      20000517 Added mts_debug_dump to print ll USB info (john)
+ *	20000518 Tweaks and documentation updates (john)
+ *	20000518 Version 0.0.13j
+ *	20000518 Cleaned up abort handling (john)
+ *	20000523 Removed scsi_command and various scsi_..._resets (john)
+ *	20000523 Added unlink URB on scsi_abort, now OHCI supports it (john)
+ *	20000523 Fixed last tiresome compile warning (john)
+ *	20000523 Version 0.0.14j (though version 0.1 has come out?)
+ *	20000602 Added primitive reset
+ *	20000602 Version 0.2.0
+ *	20000603 various cosmetic changes
+ *	20000603 Version 0.2.1
+ *	20000620 minor cosmetic changes
+ *	20000620 Version 0.2.2
+ *	20000822 Hopefully fixed deadlock in mts_remove_nolock()
+ *	20000822 Fixed minor race in mts_transfer_cleanup()
+ *	20000822 Fixed deadlock on submission error in queuecommand
+ *	20000822 Version 0.2.3
+ *	20000913 Reduced module size if debugging is off
+ *	20000913 Version 0.2.4
+ *      20010210 New abort logic
+ *      20010210 Version 0.3.0
+ *	20010217 Merged scatter/gather
+ *	20010218 Version 0.4.0
+ *	20010218 Cosmetic fixes
+ *	20010218 Version 0.4.1
+ *      20010306 Abort while using scatter/gather
+ *      20010306 Version 0.4.2
+ *      20010311 Remove all timeouts and tidy up generally (john)
+ *	20010320 check return value of scsi_register()
+ *	20010320 Version 0.4.3
+ *	20010408 Identify version on module load.
+ *	20011003 Fix multiple requests
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/random.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+#include <linux/proc_fs.h>
+#include <linux/atomic.h>
+#include <linux/blkdev.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+
+#include "microtek.h"
+
+#define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
+#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
+
+/* Should we do debugging? */
+
+//#define MTS_DO_DEBUG
+
+/* USB layer driver interface */
+
+static int mts_usb_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id);
+static void mts_usb_disconnect(struct usb_interface *intf);
+
+static const struct usb_device_id mts_usb_ids[];
+
+static struct usb_driver mts_usb_driver = {
+	.name =		"microtekX6",
+	.probe =	mts_usb_probe,
+	.disconnect =	mts_usb_disconnect,
+	.id_table =	mts_usb_ids,
+};
+
+
+/* Internal driver stuff */
+
+#define MTS_VERSION	"0.4.3"
+#define MTS_NAME	"microtek usb (rev " MTS_VERSION "): "
+
+#define MTS_WARNING(x...) \
+	printk( KERN_WARNING MTS_NAME x )
+#define MTS_ERROR(x...) \
+	printk( KERN_ERR MTS_NAME x )
+#define MTS_INT_ERROR(x...) \
+	MTS_ERROR(x)
+#define MTS_MESSAGE(x...) \
+	printk( KERN_INFO MTS_NAME x )
+
+#if defined MTS_DO_DEBUG
+
+#define MTS_DEBUG(x...) \
+	printk( KERN_DEBUG MTS_NAME x )
+
+#define MTS_DEBUG_GOT_HERE() \
+	MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
+#define MTS_DEBUG_INT() \
+	do { MTS_DEBUG_GOT_HERE(); \
+	     MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
+	     MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
+             mts_debug_dump(context->instance);\
+	   } while(0)
+#else
+
+#define MTS_NUL_STATEMENT do { } while(0)
+
+#define MTS_DEBUG(x...)	MTS_NUL_STATEMENT
+#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
+#define MTS_DEBUG_INT() MTS_NUL_STATEMENT
+
+#endif
+
+
+
+#define MTS_INT_INIT()\
+	struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
+	MTS_DEBUG_INT();\
+
+#ifdef MTS_DO_DEBUG
+
+static inline void mts_debug_dump(struct mts_desc* desc) {
+	MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
+		  (int)desc,
+		  (int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
+		);
+	MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
+		  usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
+		  usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
+		  usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
+		);
+}
+
+
+static inline void mts_show_command(struct scsi_cmnd *srb)
+{
+	char *what = NULL;
+
+	switch (srb->cmnd[0]) {
+	case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
+	case REZERO_UNIT: what = "REZERO_UNIT"; break;
+	case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
+	case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
+	case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
+	case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
+	case READ_6: what = "READ_6"; break;
+	case WRITE_6: what = "WRITE_6"; break;
+	case SEEK_6: what = "SEEK_6"; break;
+	case READ_REVERSE: what = "READ_REVERSE"; break;
+	case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
+	case SPACE: what = "SPACE"; break;
+	case INQUIRY: what = "INQUIRY"; break;
+	case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
+	case MODE_SELECT: what = "MODE_SELECT"; break;
+	case RESERVE: what = "RESERVE"; break;
+	case RELEASE: what = "RELEASE"; break;
+	case COPY: what = "COPY"; break;
+	case ERASE: what = "ERASE"; break;
+	case MODE_SENSE: what = "MODE_SENSE"; break;
+	case START_STOP: what = "START_STOP"; break;
+	case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
+	case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
+	case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
+	case SET_WINDOW: what = "SET_WINDOW"; break;
+	case READ_CAPACITY: what = "READ_CAPACITY"; break;
+	case READ_10: what = "READ_10"; break;
+	case WRITE_10: what = "WRITE_10"; break;
+	case SEEK_10: what = "SEEK_10"; break;
+	case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
+	case VERIFY: what = "VERIFY"; break;
+	case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
+	case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
+	case SEARCH_LOW: what = "SEARCH_LOW"; break;
+	case SET_LIMITS: what = "SET_LIMITS"; break;
+	case READ_POSITION: what = "READ_POSITION"; break;
+	case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
+	case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
+	case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
+	case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
+	case COMPARE: what = "COMPARE"; break;
+	case COPY_VERIFY: what = "COPY_VERIFY"; break;
+	case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
+	case READ_BUFFER: what = "READ_BUFFER"; break;
+	case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
+	case READ_LONG: what = "READ_LONG"; break;
+	case WRITE_LONG: what = "WRITE_LONG"; break;
+	case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
+	case WRITE_SAME: what = "WRITE_SAME"; break;
+	case READ_TOC: what = "READ_TOC"; break;
+	case LOG_SELECT: what = "LOG_SELECT"; break;
+	case LOG_SENSE: what = "LOG_SENSE"; break;
+	case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
+	case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
+	case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
+	case READ_12: what = "READ_12"; break;
+	case WRITE_12: what = "WRITE_12"; break;
+	case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
+	case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
+	case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
+	case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
+	case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
+	case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
+	case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
+	default:
+		MTS_DEBUG("can't decode command\n");
+		goto out;
+		break;
+	}
+	MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
+
+ out:
+	MTS_DEBUG( "  %10ph\n", srb->cmnd);
+}
+
+#else
+
+static inline void mts_show_command(struct scsi_cmnd * dummy)
+{
+}
+
+static inline void mts_debug_dump(struct mts_desc* dummy)
+{
+}
+
+#endif
+
+static inline void mts_urb_abort(struct mts_desc* desc) {
+	MTS_DEBUG_GOT_HERE();
+	mts_debug_dump(desc);
+
+	usb_kill_urb( desc->urb );
+}
+
+static int mts_slave_alloc (struct scsi_device *s)
+{
+	s->inquiry_len = 0x24;
+	return 0;
+}
+
+static int mts_slave_configure (struct scsi_device *s)
+{
+	blk_queue_dma_alignment(s->request_queue, (512 - 1));
+	return 0;
+}
+
+static int mts_scsi_abort(struct scsi_cmnd *srb)
+{
+	struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
+
+	MTS_DEBUG_GOT_HERE();
+
+	mts_urb_abort(desc);
+
+	return FAILED;
+}
+
+static int mts_scsi_host_reset(struct scsi_cmnd *srb)
+{
+	struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
+	int result;
+
+	MTS_DEBUG_GOT_HERE();
+	mts_debug_dump(desc);
+
+	result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
+	if (result == 0) {
+		result = usb_reset_device(desc->usb_dev);
+		usb_unlock_device(desc->usb_dev);
+	}
+	return result ? FAILED : SUCCESS;
+}
+
+static int
+mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
+
+static void mts_transfer_cleanup( struct urb *transfer );
+static void mts_do_sg(struct urb * transfer);
+
+static inline
+void mts_int_submit_urb (struct urb* transfer,
+			int pipe,
+			void* data,
+			unsigned length,
+			usb_complete_t callback )
+/* Interrupt context! */
+
+/* Holding transfer->context->lock! */
+{
+	int res;
+
+	MTS_INT_INIT();
+
+	usb_fill_bulk_urb(transfer,
+		      context->instance->usb_dev,
+		      pipe,
+		      data,
+		      length,
+		      callback,
+		      context
+		);
+
+	res = usb_submit_urb( transfer, GFP_ATOMIC );
+	if ( unlikely(res) ) {
+		MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
+		set_host_byte(context->srb, DID_ERROR);
+		mts_transfer_cleanup(transfer);
+	}
+}
+
+
+static void mts_transfer_cleanup( struct urb *transfer )
+/* Interrupt context! */
+{
+	MTS_INT_INIT();
+
+	if ( likely(context->final_callback != NULL) )
+		context->final_callback(context->srb);
+}
+
+static void mts_transfer_done( struct urb *transfer )
+{
+	MTS_INT_INIT();
+
+	context->srb->result &= MTS_SCSI_ERR_MASK;
+	context->srb->result |= (unsigned)(*context->scsi_status)<<1;
+
+	mts_transfer_cleanup(transfer);
+}
+
+
+static void mts_get_status( struct urb *transfer )
+/* Interrupt context! */
+{
+	MTS_INT_INIT();
+
+	mts_int_submit_urb(transfer,
+			   usb_rcvbulkpipe(context->instance->usb_dev,
+					   context->instance->ep_response),
+			   context->scsi_status,
+			   1,
+			   mts_transfer_done );
+}
+
+static void mts_data_done( struct urb* transfer )
+/* Interrupt context! */
+{
+	int status = transfer->status;
+	MTS_INT_INIT();
+
+	if ( context->data_length != transfer->actual_length ) {
+		scsi_set_resid(context->srb, context->data_length -
+			       transfer->actual_length);
+	} else if ( unlikely(status) ) {
+		set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
+	}
+
+	mts_get_status(transfer);
+}
+
+
+static void mts_command_done( struct urb *transfer )
+/* Interrupt context! */
+{
+	int status = transfer->status;
+	MTS_INT_INIT();
+
+	if ( unlikely(status) ) {
+	        if (status == -ENOENT) {
+		        /* We are being killed */
+			MTS_DEBUG_GOT_HERE();
+			set_host_byte(context->srb, DID_ABORT);
+                } else {
+		        /* A genuine error has occurred */
+			MTS_DEBUG_GOT_HERE();
+
+		        set_host_byte(context->srb, DID_ERROR);
+                }
+		mts_transfer_cleanup(transfer);
+
+		return;
+	}
+
+	if (context->srb->cmnd[0] == REQUEST_SENSE) {
+		mts_int_submit_urb(transfer,
+				   context->data_pipe,
+				   context->srb->sense_buffer,
+				   context->data_length,
+				   mts_data_done);
+	} else { if ( context->data ) {
+			mts_int_submit_urb(transfer,
+					   context->data_pipe,
+					   context->data,
+					   context->data_length,
+					   scsi_sg_count(context->srb) > 1 ?
+					           mts_do_sg : mts_data_done);
+		} else {
+			mts_get_status(transfer);
+		}
+	}
+}
+
+static void mts_do_sg (struct urb* transfer)
+{
+	int status = transfer->status;
+	MTS_INT_INIT();
+
+	MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
+	                                          scsi_sg_count(context->srb));
+
+	if (unlikely(status)) {
+                set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
+		mts_transfer_cleanup(transfer);
+        }
+
+	context->curr_sg = sg_next(context->curr_sg);
+	mts_int_submit_urb(transfer,
+			   context->data_pipe,
+			   sg_virt(context->curr_sg),
+			   context->curr_sg->length,
+			   sg_is_last(context->curr_sg) ?
+			   mts_data_done : mts_do_sg);
+}
+
+static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
+static const u8 mts_read_image_sig_len = 4;
+static const unsigned char mts_direction[256/8] = {
+	0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
+	0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+
+#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
+
+static void
+mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
+{
+	int pipe;
+
+	MTS_DEBUG_GOT_HERE();
+
+	desc->context.instance = desc;
+	desc->context.srb = srb;
+
+	if (!scsi_bufflen(srb)) {
+		desc->context.data = NULL;
+		desc->context.data_length = 0;
+		return;
+	} else {
+		desc->context.curr_sg = scsi_sglist(srb);
+		desc->context.data = sg_virt(desc->context.curr_sg);
+		desc->context.data_length = desc->context.curr_sg->length;
+	}
+
+
+	/* can't rely on srb->sc_data_direction */
+
+	/* Brutally ripped from usb-storage */
+
+	if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
+) { 		pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
+		MTS_DEBUG( "transferring from desc->ep_image == %d\n",
+			   (int)desc->ep_image );
+	} else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
+			pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
+			MTS_DEBUG( "transferring from desc->ep_response == %d\n",
+				   (int)desc->ep_response);
+	} else {
+		MTS_DEBUG("transferring to desc->ep_out == %d\n",
+			  (int)desc->ep_out);
+		pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
+	}
+	desc->context.data_pipe = pipe;
+}
+
+static int mts_scsi_queuecommand_lck(struct scsi_cmnd *srb)
+{
+	mts_scsi_cmnd_callback callback = scsi_done;
+	struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
+	int res;
+
+	MTS_DEBUG_GOT_HERE();
+	mts_show_command(srb);
+	mts_debug_dump(desc);
+
+	if ( srb->device->lun || srb->device->id || srb->device->channel ) {
+
+		MTS_DEBUG("Command to LUN=%d ID=%d CHANNEL=%d from SCSI layer\n",(int)srb->device->lun,(int)srb->device->id, (int)srb->device->channel );
+
+		MTS_DEBUG("this device doesn't exist\n");
+
+		set_host_byte(srb, DID_BAD_TARGET);
+
+		if(likely(callback != NULL))
+			callback(srb);
+
+		goto out;
+	}
+
+	
+	usb_fill_bulk_urb(desc->urb,
+		      desc->usb_dev,
+		      usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
+		      srb->cmnd,
+		      srb->cmd_len,
+		      mts_command_done,
+		      &desc->context
+		      );
+
+
+	mts_build_transfer_context( srb, desc );
+	desc->context.final_callback = callback;
+	
+	/* here we need ATOMIC as we are called with the iolock */
+	res=usb_submit_urb(desc->urb, GFP_ATOMIC);
+
+	if(unlikely(res)){
+		MTS_ERROR("error %d submitting URB\n",(int)res);
+		set_host_byte(srb, DID_ERROR);
+
+		if(likely(callback != NULL))
+			callback(srb);
+
+	}
+out:
+	return 0;
+}
+
+static DEF_SCSI_QCMD(mts_scsi_queuecommand)
+
+static struct scsi_host_template mts_scsi_host_template = {
+	.module			= THIS_MODULE,
+	.name			= "microtekX6",
+	.proc_name		= "microtekX6",
+	.queuecommand		= mts_scsi_queuecommand,
+	.eh_abort_handler	= mts_scsi_abort,
+	.eh_host_reset_handler	= mts_scsi_host_reset,
+	.sg_tablesize =		SG_ALL,
+	.can_queue =		1,
+	.this_id =		-1,
+	.emulated =		1,
+	.slave_alloc =		mts_slave_alloc,
+	.slave_configure =	mts_slave_configure,
+	.max_sectors=		256, /* 128 K */
+};
+
+/* The entries of microtek_table must correspond, line-by-line to
+   the entries of mts_supported_products[]. */
+
+static const struct usb_device_id mts_usb_ids[] =
+{
+	{ USB_DEVICE(0x4ce, 0x0300) },
+	{ USB_DEVICE(0x5da, 0x0094) },
+	{ USB_DEVICE(0x5da, 0x0099) },
+	{ USB_DEVICE(0x5da, 0x009a) },
+	{ USB_DEVICE(0x5da, 0x00a0) },
+	{ USB_DEVICE(0x5da, 0x00a3) },
+	{ USB_DEVICE(0x5da, 0x80a3) },
+	{ USB_DEVICE(0x5da, 0x80ac) },
+	{ USB_DEVICE(0x5da, 0x00b6) },
+	{ }						/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, mts_usb_ids);
+
+
+static int mts_usb_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	int i;
+	int ep_out = -1;
+	int ep_in_set[3]; /* this will break if we have more than three endpoints
+			   which is why we check */
+	int *ep_in_current = ep_in_set;
+	int err_retval = -ENOMEM;
+
+	struct mts_desc * new_desc;
+	struct usb_device *dev = interface_to_usbdev (intf);
+
+	/* the current altsetting on the interface we're probing */
+	struct usb_host_interface *altsetting;
+
+	MTS_DEBUG_GOT_HERE();
+	MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
+
+	MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
+		   le16_to_cpu(dev->descriptor.idProduct),
+		   le16_to_cpu(dev->descriptor.idVendor) );
+
+	MTS_DEBUG_GOT_HERE();
+
+	/* the current altsetting on the interface we're probing */
+	altsetting = intf->cur_altsetting;
+
+
+	/* Check if the config is sane */
+
+	if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
+		MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
+			     (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
+		return -ENODEV;
+	}
+
+	for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
+		if ((altsetting->endpoint[i].desc.bmAttributes &
+		     USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
+
+			MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
+			     (int)altsetting->endpoint[i].desc.bEndpointAddress );
+		} else {
+			if (altsetting->endpoint[i].desc.bEndpointAddress &
+			    USB_DIR_IN)
+				*ep_in_current++
+					= altsetting->endpoint[i].desc.bEndpointAddress &
+					USB_ENDPOINT_NUMBER_MASK;
+			else {
+				if ( ep_out != -1 ) {
+					MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
+					return -ENODEV;
+				}
+
+				ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
+					USB_ENDPOINT_NUMBER_MASK;
+			}
+		}
+
+	}
+
+	if (ep_in_current != &ep_in_set[2]) {
+		MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n");
+		return -ENODEV;
+	}
+
+	if ( ep_out == -1 ) {
+		MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
+		return -ENODEV;
+	}
+
+
+	new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
+	if (!new_desc)
+		goto out;
+
+	new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!new_desc->urb)
+		goto out_kfree;
+
+	new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
+	if (!new_desc->context.scsi_status)
+		goto out_free_urb;
+
+	new_desc->usb_dev = dev;
+	new_desc->usb_intf = intf;
+
+	/* endpoints */
+	new_desc->ep_out = ep_out;
+	new_desc->ep_response = ep_in_set[0];
+	new_desc->ep_image = ep_in_set[1];
+
+	if ( new_desc->ep_out != MTS_EP_OUT )
+		MTS_WARNING( "will this work? Command EP is not usually %d\n",
+			     (int)new_desc->ep_out );
+
+	if ( new_desc->ep_response != MTS_EP_RESPONSE )
+		MTS_WARNING( "will this work? Response EP is not usually %d\n",
+			     (int)new_desc->ep_response );
+
+	if ( new_desc->ep_image != MTS_EP_IMAGE )
+		MTS_WARNING( "will this work? Image data EP is not usually %d\n",
+			     (int)new_desc->ep_image );
+
+	new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
+			sizeof(new_desc));
+	if (!new_desc->host)
+		goto out_kfree2;
+
+	new_desc->host->hostdata[0] = (unsigned long)new_desc;
+	if (scsi_add_host(new_desc->host, &dev->dev)) {
+		err_retval = -EIO;
+		goto out_host_put;
+	}
+	scsi_scan_host(new_desc->host);
+
+	usb_set_intfdata(intf, new_desc);
+	return 0;
+
+ out_host_put:
+	scsi_host_put(new_desc->host);
+ out_kfree2:
+	kfree(new_desc->context.scsi_status);
+ out_free_urb:
+	usb_free_urb(new_desc->urb);
+ out_kfree:
+	kfree(new_desc);
+ out:
+	return err_retval;
+}
+
+static void mts_usb_disconnect (struct usb_interface *intf)
+{
+	struct mts_desc *desc = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	usb_kill_urb(desc->urb);
+	scsi_remove_host(desc->host);
+
+	scsi_host_put(desc->host);
+	usb_free_urb(desc->urb);
+	kfree(desc->context.scsi_status);
+	kfree(desc);
+}
+
+module_usb_driver(mts_usb_driver);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/image/microtek.h b/drivers/usb/image/microtek.h
new file mode 100644
index 000000000..7bd5f4639
--- /dev/null
+++ b/drivers/usb/image/microtek.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+ /*
+ * Driver for Microtek Scanmaker X6 USB scanner and possibly others.
+ * 
+ * (C) Copyright 2000 John Fremlin <vii@penguinpowered.com>
+ * (C) Copyright 2000 Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
+ *
+ * See microtek.c for history
+ *
+ */
+
+typedef void (*mts_scsi_cmnd_callback)(struct scsi_cmnd *);
+
+
+struct mts_transfer_context
+{
+	struct mts_desc *instance;
+	mts_scsi_cmnd_callback final_callback;
+	struct scsi_cmnd *srb;
+	
+	void *data;
+	unsigned data_length;
+	int data_pipe;
+	struct scatterlist *curr_sg;
+
+	u8 *scsi_status; /* status returned from ep_response after command completion */
+};
+
+
+struct mts_desc {
+	struct mts_desc *next;
+	struct mts_desc *prev;
+
+	struct usb_device *usb_dev;
+	struct usb_interface *usb_intf;
+
+	/* Endpoint addresses */
+	u8 ep_out;
+	u8 ep_response;
+	u8 ep_image;
+
+	struct Scsi_Host *host;
+
+	struct urb *urb;
+	struct mts_transfer_context context;
+};
+
+
+#define MTS_EP_OUT	0x1
+#define MTS_EP_RESPONSE	0x2
+#define MTS_EP_IMAGE	0x3
+#define MTS_EP_TOTAL	0x3
+
+#define MTS_SCSI_ERR_MASK ~0x3fu
+