v4.19.13 snapshot.
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
new file mode 100644
index 0000000..20b0f91
--- /dev/null
+++ b/drivers/usb/misc/idmouse.c
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Siemens ID Mouse driver v0.6
+
+ Copyright (C) 2004-5 by Florian 'Floe' Echtler <echtler@fs.tum.de>
+ and Andreas 'ad' Deresch <aderesch@fs.tum.de>
+
+ Derived from the USB Skeleton driver 1.1,
+ Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com)
+
+ Additional information provided by Martin Reising
+ <Martin.Reising@natural-computing.de>
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/sched/signal.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+
+/* image constants */
+#define WIDTH 225
+#define HEIGHT 289
+#define HEADER "P5 225 289 255 "
+#define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
+
+#define DRIVER_SHORT "idmouse"
+#define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>"
+#define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
+
+/* minor number for misc USB devices */
+#define USB_IDMOUSE_MINOR_BASE 132
+
+/* vendor and device IDs */
+#define ID_SIEMENS 0x0681
+#define ID_IDMOUSE 0x0005
+#define ID_CHERRY 0x0010
+
+/* device ID table */
+static const struct usb_device_id idmouse_table[] = {
+ {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
+ {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
+ {} /* terminating null entry */
+};
+
+/* sensor commands */
+#define FTIP_RESET 0x20
+#define FTIP_ACQUIRE 0x21
+#define FTIP_RELEASE 0x22
+#define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
+#define FTIP_SCROLL 0x24
+
+#define ftip_command(dev, command, value, index) \
+ usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
+ USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
+
+MODULE_DEVICE_TABLE(usb, idmouse_table);
+static DEFINE_MUTEX(open_disc_mutex);
+
+/* structure to hold all of our device specific stuff */
+struct usb_idmouse {
+
+ struct usb_device *udev; /* save off the usb device pointer */
+ struct usb_interface *interface; /* the interface for this device */
+
+ unsigned char *bulk_in_buffer; /* the buffer to receive data */
+ size_t bulk_in_size; /* the maximum bulk packet size */
+ size_t orig_bi_size; /* same as above, but reported by the device */
+ __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
+
+ int open; /* if the port is open or not */
+ int present; /* if the device is not disconnected */
+ struct mutex lock; /* locks this structure */
+
+};
+
+/* local function prototypes */
+static ssize_t idmouse_read(struct file *file, char __user *buffer,
+ size_t count, loff_t * ppos);
+
+static int idmouse_open(struct inode *inode, struct file *file);
+static int idmouse_release(struct inode *inode, struct file *file);
+
+static int idmouse_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+
+static void idmouse_disconnect(struct usb_interface *interface);
+static int idmouse_suspend(struct usb_interface *intf, pm_message_t message);
+static int idmouse_resume(struct usb_interface *intf);
+
+/* file operation pointers */
+static const struct file_operations idmouse_fops = {
+ .owner = THIS_MODULE,
+ .read = idmouse_read,
+ .open = idmouse_open,
+ .release = idmouse_release,
+ .llseek = default_llseek,
+};
+
+/* class driver information */
+static struct usb_class_driver idmouse_class = {
+ .name = "idmouse%d",
+ .fops = &idmouse_fops,
+ .minor_base = USB_IDMOUSE_MINOR_BASE,
+};
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver idmouse_driver = {
+ .name = DRIVER_SHORT,
+ .probe = idmouse_probe,
+ .disconnect = idmouse_disconnect,
+ .suspend = idmouse_suspend,
+ .resume = idmouse_resume,
+ .reset_resume = idmouse_resume,
+ .id_table = idmouse_table,
+ .supports_autosuspend = 1,
+};
+
+static int idmouse_create_image(struct usb_idmouse *dev)
+{
+ int bytes_read;
+ int bulk_read;
+ int result;
+
+ memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
+ bytes_read = sizeof(HEADER)-1;
+
+ /* reset the device and set a fast blink rate */
+ result = ftip_command(dev, FTIP_RELEASE, 0, 0);
+ if (result < 0)
+ goto reset;
+ result = ftip_command(dev, FTIP_BLINK, 1, 0);
+ if (result < 0)
+ goto reset;
+
+ /* initialize the sensor - sending this command twice */
+ /* significantly reduces the rate of failed reads */
+ result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
+ if (result < 0)
+ goto reset;
+ result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
+ if (result < 0)
+ goto reset;
+
+ /* start the readout - sending this command twice */
+ /* presumably enables the high dynamic range mode */
+ result = ftip_command(dev, FTIP_RESET, 0, 0);
+ if (result < 0)
+ goto reset;
+ result = ftip_command(dev, FTIP_RESET, 0, 0);
+ if (result < 0)
+ goto reset;
+
+ /* loop over a blocking bulk read to get data from the device */
+ while (bytes_read < IMGSIZE) {
+ result = usb_bulk_msg (dev->udev,
+ usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
+ dev->bulk_in_buffer + bytes_read,
+ dev->bulk_in_size, &bulk_read, 5000);
+ if (result < 0) {
+ /* Maybe this error was caused by the increased packet size? */
+ /* Reset to the original value and tell userspace to retry. */
+ if (dev->bulk_in_size != dev->orig_bi_size) {
+ dev->bulk_in_size = dev->orig_bi_size;
+ result = -EAGAIN;
+ }
+ break;
+ }
+ if (signal_pending(current)) {
+ result = -EINTR;
+ break;
+ }
+ bytes_read += bulk_read;
+ }
+
+ /* reset the device */
+reset:
+ ftip_command(dev, FTIP_RELEASE, 0, 0);
+
+ /* check for valid image */
+ /* right border should be black (0x00) */
+ for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
+ if (dev->bulk_in_buffer[bytes_read] != 0x00)
+ return -EAGAIN;
+
+ /* lower border should be white (0xFF) */
+ for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
+ if (dev->bulk_in_buffer[bytes_read] != 0xFF)
+ return -EAGAIN;
+
+ /* should be IMGSIZE == 65040 */
+ dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n",
+ bytes_read);
+ return result;
+}
+
+/* PM operations are nops as this driver does IO only during open() */
+static int idmouse_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ return 0;
+}
+
+static int idmouse_resume(struct usb_interface *intf)
+{
+ return 0;
+}
+
+static inline void idmouse_delete(struct usb_idmouse *dev)
+{
+ kfree(dev->bulk_in_buffer);
+ kfree(dev);
+}
+
+static int idmouse_open(struct inode *inode, struct file *file)
+{
+ struct usb_idmouse *dev;
+ struct usb_interface *interface;
+ int result;
+
+ /* get the interface from minor number and driver information */
+ interface = usb_find_interface (&idmouse_driver, iminor (inode));
+ if (!interface)
+ return -ENODEV;
+
+ mutex_lock(&open_disc_mutex);
+ /* get the device information block from the interface */
+ dev = usb_get_intfdata(interface);
+ if (!dev) {
+ mutex_unlock(&open_disc_mutex);
+ return -ENODEV;
+ }
+
+ /* lock this device */
+ mutex_lock(&dev->lock);
+ mutex_unlock(&open_disc_mutex);
+
+ /* check if already open */
+ if (dev->open) {
+
+ /* already open, so fail */
+ result = -EBUSY;
+
+ } else {
+
+ /* create a new image and check for success */
+ result = usb_autopm_get_interface(interface);
+ if (result)
+ goto error;
+ result = idmouse_create_image (dev);
+ usb_autopm_put_interface(interface);
+ if (result)
+ goto error;
+
+ /* increment our usage count for the driver */
+ ++dev->open;
+
+ /* save our object in the file's private structure */
+ file->private_data = dev;
+
+ }
+
+error:
+
+ /* unlock this device */
+ mutex_unlock(&dev->lock);
+ return result;
+}
+
+static int idmouse_release(struct inode *inode, struct file *file)
+{
+ struct usb_idmouse *dev;
+
+ dev = file->private_data;
+
+ if (dev == NULL)
+ return -ENODEV;
+
+ mutex_lock(&open_disc_mutex);
+ /* lock our device */
+ mutex_lock(&dev->lock);
+
+ /* are we really open? */
+ if (dev->open <= 0) {
+ mutex_unlock(&dev->lock);
+ mutex_unlock(&open_disc_mutex);
+ return -ENODEV;
+ }
+
+ --dev->open;
+
+ if (!dev->present) {
+ /* the device was unplugged before the file was released */
+ mutex_unlock(&dev->lock);
+ mutex_unlock(&open_disc_mutex);
+ idmouse_delete(dev);
+ } else {
+ mutex_unlock(&dev->lock);
+ mutex_unlock(&open_disc_mutex);
+ }
+ return 0;
+}
+
+static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
+ loff_t * ppos)
+{
+ struct usb_idmouse *dev = file->private_data;
+ int result;
+
+ /* lock this object */
+ mutex_lock(&dev->lock);
+
+ /* verify that the device wasn't unplugged */
+ if (!dev->present) {
+ mutex_unlock(&dev->lock);
+ return -ENODEV;
+ }
+
+ result = simple_read_from_buffer(buffer, count, ppos,
+ dev->bulk_in_buffer, IMGSIZE);
+ /* unlock the device */
+ mutex_unlock(&dev->lock);
+ return result;
+}
+
+static int idmouse_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+ struct usb_idmouse *dev;
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ int result;
+
+ /* check if we have gotten the data or the hid interface */
+ iface_desc = &interface->altsetting[0];
+ if (iface_desc->desc.bInterfaceClass != 0x0A)
+ return -ENODEV;
+
+ if (iface_desc->desc.bNumEndpoints < 1)
+ return -ENODEV;
+
+ /* allocate memory for our device state and initialize it */
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL)
+ return -ENOMEM;
+
+ mutex_init(&dev->lock);
+ dev->udev = udev;
+ dev->interface = interface;
+
+ /* set up the endpoint information - use only the first bulk-in endpoint */
+ result = usb_find_bulk_in_endpoint(iface_desc, &endpoint);
+ if (result) {
+ dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n");
+ idmouse_delete(dev);
+ return result;
+ }
+
+ dev->orig_bi_size = usb_endpoint_maxp(endpoint);
+ dev->bulk_in_size = 0x200; /* works _much_ faster */
+ dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
+ dev->bulk_in_buffer = kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
+ if (!dev->bulk_in_buffer) {
+ idmouse_delete(dev);
+ return -ENOMEM;
+ }
+
+ /* allow device read, write and ioctl */
+ dev->present = 1;
+
+ /* we can register the device now, as it is ready */
+ usb_set_intfdata(interface, dev);
+ result = usb_register_dev(interface, &idmouse_class);
+ if (result) {
+ /* something prevented us from registering this device */
+ dev_err(&interface->dev, "Unable to allocate minor number.\n");
+ usb_set_intfdata(interface, NULL);
+ idmouse_delete(dev);
+ return result;
+ }
+
+ /* be noisy */
+ dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
+
+ return 0;
+}
+
+static void idmouse_disconnect(struct usb_interface *interface)
+{
+ struct usb_idmouse *dev;
+
+ /* get device structure */
+ dev = usb_get_intfdata(interface);
+
+ /* give back our minor */
+ usb_deregister_dev(interface, &idmouse_class);
+
+ mutex_lock(&open_disc_mutex);
+ usb_set_intfdata(interface, NULL);
+ /* lock the device */
+ mutex_lock(&dev->lock);
+ mutex_unlock(&open_disc_mutex);
+
+ /* prevent device read, write and ioctl */
+ dev->present = 0;
+
+ /* if the device is opened, idmouse_release will clean this up */
+ if (!dev->open) {
+ mutex_unlock(&dev->lock);
+ idmouse_delete(dev);
+ } else {
+ /* unlock */
+ mutex_unlock(&dev->lock);
+ }
+
+ dev_info(&interface->dev, "disconnected\n");
+}
+
+module_usb_driver(idmouse_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+