diff options
Diffstat (limited to 'drivers/usb/misc/idmouse.c')
| -rw-r--r-- | drivers/usb/misc/idmouse.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c new file mode 100644 index 000000000000..ce030d1f1c1f --- /dev/null +++ b/drivers/usb/misc/idmouse.c @@ -0,0 +1,443 @@ +/* Siemens ID Mouse driver v0.5 + + 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. + + 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) + +*/ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/smp_lock.h> +#include <linux/completion.h> +#include <asm/uaccess.h> +#include <linux/usb.h> + +#define WIDTH 225 +#define HEIGHT 288 +#define HEADER "P5 225 288 255 " +#define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1) + +/* Version Information */ +#define DRIVER_VERSION "0.5" +#define DRIVER_SHORT "idmouse" +#define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>" +#define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver" + +/* Siemens ID Mouse */ +#define USB_IDMOUSE_VENDOR_ID 0x0681 +#define USB_IDMOUSE_PRODUCT_ID 0x0005 + +/* we still need a minor number */ +#define USB_IDMOUSE_MINOR_BASE 132 + +static struct usb_device_id idmouse_table[] = { + {USB_DEVICE(USB_IDMOUSE_VENDOR_ID, USB_IDMOUSE_PRODUCT_ID)}, + {} /* null entry at the end */ +}; + +MODULE_DEVICE_TABLE(usb, idmouse_table); + +/* 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 size of the receive buffer */ + __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 semaphore sem; /* 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); + +/* file operation pointers */ +static struct file_operations idmouse_fops = { + .owner = THIS_MODULE, + .read = idmouse_read, + .open = idmouse_open, + .release = idmouse_release, +}; + +/* class driver information for devfs */ +static struct usb_class_driver idmouse_class = { + .name = "usb/idmouse%d", + .fops = &idmouse_fops, + .mode = S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH, /* filemode (char, 444) */ + .minor_base = USB_IDMOUSE_MINOR_BASE, +}; + +/* usb specific object needed to register this driver with the usb subsystem */ +static struct usb_driver idmouse_driver = { + .owner = THIS_MODULE, + .name = DRIVER_SHORT, + .probe = idmouse_probe, + .disconnect = idmouse_disconnect, + .id_table = idmouse_table, +}; + +// prevent races between open() and disconnect() +static DECLARE_MUTEX(disconnect_sem); + +static int idmouse_create_image(struct usb_idmouse *dev) +{ + int bytes_read = 0; + int bulk_read = 0; + int result = 0; + + if (dev->bulk_in_size < sizeof(HEADER)) + return -ENOMEM; + + memcpy(dev->bulk_in_buffer,HEADER,sizeof(HEADER)-1); + bytes_read += sizeof(HEADER)-1; + + /* Dump the setup packets. Yes, they are uncommented, simply + because they were sniffed under Windows using SnoopyPro. + I _guess_ that 0x22 is a kind of reset command and 0x21 + means init.. + */ + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x21, 0x42, 0x0001, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x20, 0x42, 0x0001, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x22, 0x42, 0x0000, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x21, 0x42, 0x0001, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x20, 0x42, 0x0001, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x20, 0x42, 0x0000, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + + /* 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) + return result; + if (signal_pending(current)) + return -EINTR; + bytes_read += bulk_read; + } + + /* reset the device */ + result = usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), + 0x22, 0x42, 0x0000, 0x0002, NULL, 0, 1000); + if (result < 0) + return result; + + /* should be IMGSIZE == 64815 */ + dbg("read %d bytes fingerprint data", bytes_read); + 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 = NULL; + struct usb_interface *interface; + int result = 0; + + /* prevent disconnects */ + down(&disconnect_sem); + + /* get the interface from minor number and driver information */ + interface = usb_find_interface (&idmouse_driver, iminor (inode)); + if (!interface) { + up(&disconnect_sem); + return -ENODEV; + } + /* get the device information block from the interface */ + dev = usb_get_intfdata(interface); + if (!dev) { + up(&disconnect_sem); + return -ENODEV; + } + + /* lock this device */ + down(&dev->sem); + + /* check if already open */ + if (dev->open) { + + /* already open, so fail */ + result = -EBUSY; + + } else { + + /* create a new image and check for success */ + result = idmouse_create_image (dev); + 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 */ + up(&dev->sem); + + /* unlock the disconnect semaphore */ + up(&disconnect_sem); + return result; +} + +static int idmouse_release(struct inode *inode, struct file *file) +{ + struct usb_idmouse *dev; + + /* prevent a race condition with open() */ + down(&disconnect_sem); + + dev = (struct usb_idmouse *) file->private_data; + + if (dev == NULL) { + up(&disconnect_sem); + return -ENODEV; + } + + /* lock our device */ + down(&dev->sem); + + /* are we really open? */ + if (dev->open <= 0) { + up(&dev->sem); + up(&disconnect_sem); + return -ENODEV; + } + + --dev->open; + + if (!dev->present) { + /* the device was unplugged before the file was released */ + up(&dev->sem); + idmouse_delete(dev); + up(&disconnect_sem); + return 0; + } + + up(&dev->sem); + up(&disconnect_sem); + return 0; +} + +static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count, + loff_t * ppos) +{ + struct usb_idmouse *dev; + int result = 0; + + dev = (struct usb_idmouse *) file->private_data; + + // lock this object + down (&dev->sem); + + // verify that the device wasn't unplugged + if (!dev->present) { + up (&dev->sem); + return -ENODEV; + } + + if (*ppos >= IMGSIZE) { + up (&dev->sem); + return 0; + } + + if (count > IMGSIZE - *ppos) + count = IMGSIZE - *ppos; + + if (copy_to_user (buffer, dev->bulk_in_buffer + *ppos, count)) { + result = -EFAULT; + } else { + result = count; + *ppos += count; + } + + // unlock the device + up(&dev->sem); + 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 = NULL; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + size_t buffer_size; + 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; + + /* allocate memory for our device state and initialize it */ + dev = kmalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) + return -ENOMEM; + memset(dev, 0x00, sizeof(*dev)); + + init_MUTEX(&dev->sem); + dev->udev = udev; + dev->interface = interface; + + /* set up the endpoint information - use only the first bulk-in endpoint */ + endpoint = &iface_desc->endpoint[0].desc; + if (!dev->bulk_in_endpointAddr + && (endpoint->bEndpointAddress & USB_DIR_IN) + && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == + USB_ENDPOINT_XFER_BULK)) { + + /* we found a bulk in endpoint */ + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + dev->bulk_in_size = buffer_size; + dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; + dev->bulk_in_buffer = + kmalloc(IMGSIZE + buffer_size, GFP_KERNEL); + + if (!dev->bulk_in_buffer) { + err("Unable to allocate input buffer."); + idmouse_delete(dev); + return -ENOMEM; + } + } + + if (!(dev->bulk_in_endpointAddr)) { + err("Unable to find bulk-in endpoint."); + idmouse_delete(dev); + return -ENODEV; + } + /* 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 */ + err("Unble to allocate minor number."); + 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; + + /* prevent races with open() */ + down(&disconnect_sem); + + /* get device structure */ + dev = usb_get_intfdata(interface); + usb_set_intfdata(interface, NULL); + + /* lock it */ + down(&dev->sem); + + /* give back our minor */ + usb_deregister_dev(interface, &idmouse_class); + + /* prevent device read, write and ioctl */ + dev->present = 0; + + /* unlock */ + up(&dev->sem); + + /* if the device is opened, idmouse_release will clean this up */ + if (!dev->open) + idmouse_delete(dev); + + up(&disconnect_sem); + + info("%s disconnected", DRIVER_DESC); +} + +static int __init usb_idmouse_init(void) +{ + int result; + + info(DRIVER_DESC " " DRIVER_VERSION); + + /* register this driver with the USB subsystem */ + result = usb_register(&idmouse_driver); + if (result) + err("Unable to register device (error %d).", result); + + return result; +} + +static void __exit usb_idmouse_exit(void) +{ + /* deregister this driver with the USB subsystem */ + usb_deregister(&idmouse_driver); +} + +module_init(usb_idmouse_init); +module_exit(usb_idmouse_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + |