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wacom.c

/*
 *  USB Wacom Graphire and Wacom Intuos tablet support
 *
 *  Copyright (c) 2000-2002 Vojtech Pavlik      <vojtech@ucw.cz>
 *  Copyright (c) 2000 Andreas Bach Aaen  <abach@stofanet.dk>
 *  Copyright (c) 2000 Clifford Wolf            <clifford@clifford.at>
 *  Copyright (c) 2000 Sam Mosel          <sam.mosel@computer.org>
 *  Copyright (c) 2000 James E. Blair           <corvus@gnu.org>
 *  Copyright (c) 2000 Daniel Egger       <egger@suse.de>
 *  Copyright (c) 2001 Frederic Lepied          <flepied@mandrakesoft.com>
 *  Copyright (c) 2002-2004 Ping Cheng          <pingc@wacom.com>
 *
 *  ChangeLog:
 *      v0.1 (vp)  - Initial release
 *      v0.2 (aba) - Support for all buttons / combinations
 *      v0.3 (vp)  - Support for Intuos added
 *    v0.4 (sm)  - Support for more Intuos models, menustrip
 *                relative mode, proximity.
 *    v0.5 (vp)  - Big cleanup, nifty features removed,
 *                they belong in userspace
 *    v1.8 (vp)  - Submit URB only when operating, moved to CVS,
 *                use input_report_key instead of report_btn and
 *                other cleanups
 *    v1.11 (vp) - Add URB ->dev setting for new kernels
 *    v1.11 (jb) - Add support for the 4D Mouse & Lens
 *    v1.12 (de) - Add support for two more inking pen IDs
 *    v1.14 (vp) - Use new USB device id probing scheme.
 *               Fix Wacom Graphire mouse wheel
 *    v1.18 (vp) - Fix mouse wheel direction
 *               Make mouse relative
 *      v1.20 (fl) - Report tool id for Intuos devices
 *                 - Multi tools support
 *                 - Corrected Intuos protocol decoding (airbrush, 4D mouse, lens cursor...)
 *                 - Add PL models support
 *             - Fix Wacom Graphire mouse wheel again
 *    v1.21 (vp) - Removed protocol descriptions
 *             - Added MISC_SERIAL for tool serial numbers
 *          (gb) - Identify version on module load.
 *    v1.21.1 (fl) - added Graphire2 support
 *    v1.21.2 (fl) - added Intuos2 support
 *                 - added all the PL ids
 *    v1.21.3 (fl) - added another eraser id from Neil Okamoto
 *                 - added smooth filter for Graphire from Peri Hankey
 *                 - added PenPartner support from Olaf van Es
 *                 - new tool ids from Ole Martin Bjoerndalen
 *    v1.29 (pc) - Add support for more tablets
 *             - Fix pressure reporting
 *    v1.30 (vp) - Merge 2.4 and 2.5 drivers
 *             - Since 2.5 now has input_sync(), remove MSC_SERIAL abuse
 *             - Cleanups here and there
 *
 *   WARNING: THIS IS NOT PART OF THE OFFICIAL KERNEL TREE
 *   THIS IS FOR TESTING PURPOSES
 *
 *    v1.30-2.6.2-pc-0.1 - initial release based on 2.6.2
 *    v1.30-2.6.2-pc-0.2 - linuxwacom-0.6.2
 *    v1.30-2.6.2-pc-0.3 - added Intuos3
 *    v1.30-2.6.2-pc-0.4 - linuxwacom-0.6.6
 */

/*
 * 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.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>

/*
 * Version Information
 */
#define DRIVER_VERSION "v1.30 - 2.6.2-pc-0.4"
#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
#define DRIVER_DESC "USB Wacom Graphire and Wacom Intuos tablet driver"
#define DRIVER_LICENSE "GPL"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);

#define USB_VENDOR_ID_WACOM   0x056a

struct wacom_features {
      char *name;
      int pktlen;
      int x_max;
      int y_max;
      int pressure_max;
      int distance_max;
      int type;
      usb_complete_t irq;
};

struct wacom {
      signed char *data;
      dma_addr_t data_dma;
      struct input_dev dev;
      struct usb_device *usbdev;
      struct urb *irq;
      struct wacom_features *features;
      int tool[2];
      int open;
      __u32 serial[2];
      char phys[32];
};

#define USB_REQ_SET_REPORT    0x09
static int usb_set_report(struct usb_interface *intf, unsigned char type,
                        unsigned char id, void *buf, int size)
{
        return usb_control_msg(interface_to_usbdev(intf),
            usb_sndctrlpipe(interface_to_usbdev(intf), 0),
                USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
            buf, size, HZ);
}

static void wacom_pl_irq(struct urb *urb, struct pt_regs *regs)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      int prox, pressure;
      int retval;

      switch (urb->status) {
      case 0:
            /* success */
            break;
      case -ECONNRESET:
      case -ENOENT:
      case -ESHUTDOWN:
            /* this urb is terminated, clean up */
            dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
            return;
      default:
            dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
            goto exit;
      }

      if (data[0] != 2) {
            dbg("wacom_pl_irq: received unknown report #%d", data[0]);
            return;
      }

      prox = data[1] & 0x40;

      input_regs(dev, regs);
      
      if (prox) {

            pressure = (signed char)((data[7] << 1) | ((data[4] >> 2) & 1));
            if (wacom->features->pressure_max > 255)
                  pressure = (pressure << 1) | ((data[4] >> 6) & 1);
            pressure += (wacom->features->pressure_max + 1) / 2;

                /*
                 * if going from out of proximity into proximity select between the eraser
                 * and the pen based on the state of the stylus2 button, choose eraser if
                 * pressed else choose pen. if not a proximity change from out to in, send
                 * an out of proximity for previous tool then a in for new tool.
                 */
                if (!wacom->tool[0]) {
                        /* Going into proximity select tool */
                        wacom->tool[1] = (data[4] & 0x20)? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
                }
                else {
                        /* was entered with stylus2 pressed */
                        if (wacom->tool[1] == BTN_TOOL_RUBBER && !(data[4] & 0x20) ) {
                                /* report out proximity for previous tool */
                                input_report_key(dev, wacom->tool[1], 0);
                                input_sync(dev);
                                wacom->tool[1] = BTN_TOOL_PEN;
                                goto exit;
                        }
                }
                if (wacom->tool[1] != BTN_TOOL_RUBBER) {
                        /* Unknown tool selected default to pen tool */
                        wacom->tool[1] = BTN_TOOL_PEN;
                }
                input_report_key(dev, wacom->tool[1], prox); /* report in proximity for tool */
            input_report_abs(dev, ABS_X, data[3] | ((__u32)data[2] << 7) | ((__u32)(data[1] & 0x03) << 14));
            input_report_abs(dev, ABS_Y, data[6] | ((__u32)data[5] << 7) | ((__u32)(data[4] & 0x03) << 14));
            input_report_abs(dev, ABS_PRESSURE, pressure);

            input_report_key(dev, BTN_TOUCH, data[4] & 0x08);
            input_report_key(dev, BTN_STYLUS, data[4] & 0x10);
                /* Only allow the stylus2 button to be reported for the pen tool. */
            input_report_key(dev, BTN_STYLUS2, (wacom->tool[1] == BTN_TOOL_PEN) && (data[4] & 0x20));
      }
        else {
                /* report proximity-out of a (valid) tool */
                if (wacom->tool[1] != BTN_TOOL_RUBBER) {
                        /* Unknown tool selected default to pen tool */
                        wacom->tool[1] = BTN_TOOL_PEN;
                }
                input_report_key(dev, wacom->tool[1], prox);
        }
      
        wacom->tool[0] = prox; /* Save proximity state */
      input_sync(dev);

exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                 __FUNCTION__, retval);
}

static void wacom_ptu_irq(struct urb *urb, struct pt_regs *regs)
{
        struct wacom *wacom = urb->context;
        unsigned char *data = wacom->data;
        struct input_dev *dev = &wacom->dev;
        int retval;

        switch (urb->status) {
        case 0:
                /* success */
                break;
        case -ECONNRESET:
        case -ENOENT:
        case -ESHUTDOWN:
                /* this urb is terminated, clean up */
                dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
                return;
        default:
                dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
                goto exit;
        }

        if (data[0] != 2) {
                printk(KERN_INFO "wacom_ptu_irq: received unknown report #%d\n", data[0]);
            return;
       }

        input_regs(dev, regs);
        if (data[1] & 0x04)
        {
                input_report_key(dev, BTN_TOOL_RUBBER, data[1] & 0x20);
                input_report_key(dev, BTN_TOUCH, data[1] & 0x08);
        }
        else
        {
                input_report_key(dev, BTN_TOOL_PEN, data[1] & 0x20);
                input_report_key(dev, BTN_TOUCH, data[1] & 0x01);
        }
        input_report_abs(dev, ABS_X, data[3] << 8 | data[2]);
        input_report_abs(dev, ABS_Y, data[5] << 8 | data[4]);
        input_report_abs(dev, ABS_PRESSURE, (data[6]|data[7] << 8));
        input_report_key(dev, BTN_STYLUS, data[1] & 0x02);
        input_report_key(dev, BTN_STYLUS2, data[1] & 0x10);

        input_sync(dev);

exit:
        retval = usb_submit_urb (urb, GFP_ATOMIC);
        if (retval)
                err ("%s - usb_submit_urb failed with result %d",
                     __FUNCTION__, retval);
}

static void wacom_penpartner_irq(struct urb *urb, struct pt_regs *regs)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      int retval;

      switch (urb->status) {
      case 0:
            /* success */
            break;
      case -ECONNRESET:
      case -ENOENT:
      case -ESHUTDOWN:
            /* this urb is terminated, clean up */
            dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
            return;
      default:
            dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
            goto exit;
      }

        if (data[0] != 2) {
                printk(KERN_INFO "wacom_penpartner_irq: received unknown report #%d\n", data[0]);
            return;
        }

      input_regs(dev, regs);
      input_report_key(dev, BTN_TOOL_PEN, 1);
      input_report_abs(dev, ABS_X, data[2] << 8 | data[1]);
      input_report_abs(dev, ABS_Y, data[4] << 8 | data[3]);
      input_report_abs(dev, ABS_PRESSURE, (signed char)data[6] + 127);
      input_report_key(dev, BTN_TOUCH, ((signed char)data[6] > -80) && !(data[5] & 0x20));
      input_report_key(dev, BTN_STYLUS, (data[5] & 0x40));
      input_sync(dev);

exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                 __FUNCTION__, retval);
}

static void wacom_graphire_irq(struct urb *urb, struct pt_regs *regs)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      int x, y;
      int retval;

      switch (urb->status) {
      case 0:
            /* success */
            break;
      case -ECONNRESET:
      case -ENOENT:
      case -ESHUTDOWN:
            /* this urb is terminated, clean up */
            dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
            return;
      default:
            dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
            goto exit;
      }

      if (data[0] != 2) {
            dbg("wacom_graphire_irq: received unknown report #%d", data[0]);
            return;
      }

      x = data[2] | ((__u32)data[3] << 8);
      y = data[4] | ((__u32)data[5] << 8);

      input_regs(dev, regs);

      switch ((data[1] >> 5) & 3) {

            case 0:     /* Pen */
                  input_report_key(dev, BTN_TOOL_PEN, data[1] & 0x80);
                  break;

            case 1: /* Rubber */
                  input_report_key(dev, BTN_TOOL_RUBBER, data[1] & 0x80);
                  break;

            case 2: /* Mouse with wheel */
                  input_report_key(dev, BTN_MIDDLE, data[1] & 0x04);
                  input_report_rel(dev, REL_WHEEL, (signed char) data[6]);
                        /* fall through */

                case 3: /* Mouse without wheel */
                  input_report_key(dev, BTN_TOOL_MOUSE, data[7] > 24);
                  input_report_key(dev, BTN_LEFT, data[1] & 0x01);
                  input_report_key(dev, BTN_RIGHT, data[1] & 0x02);
                  input_report_abs(dev, ABS_DISTANCE, data[7]);

                  input_report_abs(dev, ABS_X, x);
                  input_report_abs(dev, ABS_Y, y);

                  input_sync(dev);
                  goto exit;
      }

      if (data[1] & 0x80) {
            input_report_abs(dev, ABS_X, x);
            input_report_abs(dev, ABS_Y, y);
      }

      input_report_abs(dev, ABS_PRESSURE, data[6] | ((__u32)data[7] << 8));
      input_report_key(dev, BTN_TOUCH, data[1] & 0x01);
      input_report_key(dev, BTN_STYLUS, data[1] & 0x02);
      input_report_key(dev, BTN_STYLUS2, data[1] & 0x04);

      input_sync(dev);

exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                 __FUNCTION__, retval);
}

static int wacom_intuos_inout(struct urb *urb)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      int idx;

      /* tool number */
      idx = data[1] & 0x01;

      /* Enter report */
      if ((data[1] & 0xfc) == 0xc0) 
      {     
            /* serial number of the tool */
            wacom->serial[idx] = ((__u32)(data[3] & 0x0f) << 28) +      
                  ((__u32)data[4] << 20) + ((__u32)data[5] << 12) +
                  ((__u32)data[6] << 4) + (data[7] >> 4);

            switch (((__u32)data[2] << 4) | (data[3] >> 4)) {
                  case 0x812: /* Inking pen */
                  case 0x801: /* Intuos3 Inking pen */
                  case 0x012: 
                        wacom->tool[idx] = BTN_TOOL_PENCIL;
                        break;      
                  case 0x822: /* Pen */
                  case 0x842:
                  case 0x852:
                  case 0x823: /* Intuos3 Grip Pen */
                  case 0x813: /* Intuos3 Classic Pen */
                  case 0x885: /* Intuos3 Marker Pen */
                  case 0x022: 
                        wacom->tool[idx] = BTN_TOOL_PEN;
                        break;
                  case 0x832: /* Stroke pen */
                  case 0x032: 
                        wacom->tool[idx] = BTN_TOOL_BRUSH;
                        break;
                  case 0x007: /* Mouse 4D and 2D */
                    case 0x09c:
                  case 0x094:
                  case 0x017: /* Intuos3 2D Mouse */
                        wacom->tool[idx] = BTN_TOOL_MOUSE;
                        break;
                  case 0x096: /* Lens cursor */
                  case 0x097: /* Intuos3 Lens cursor */
                        wacom->tool[idx] = BTN_TOOL_LENS;
                        break;
                  case 0x82a: /* Eraser */
                  case 0x85a:
                    case 0x91a:
                  case 0xd1a:
                  case 0x0fa: 
                  case 0x82b: /* Intuos3 Grip Pen Eraser */
                  case 0x81b: /* Intuos3 Classic Pen Eraser */
                  case 0x91b: /* Intuos3 Airbrush Eraser */
                        wacom->tool[idx] = BTN_TOOL_RUBBER;
                        break;
                  case 0xd12: /* Airbrush */
                  case 0x912:
                  case 0x112: 
                  case 0x913: /* Intuos3 Airbrush */
                        wacom->tool[idx] = BTN_TOOL_AIRBRUSH;
                        break;
                  default: /* Unknown tool */
                        wacom->tool[idx] = BTN_TOOL_PEN;
            }
            input_report_key(dev, wacom->tool[idx], 1);
            input_event(dev, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
            input_sync(dev);
            return 1;
      }

      /* Exit report */
      if ((data[1] & 0xfe) == 0x80) {
            input_report_key(dev, wacom->tool[idx], 0);
            input_event(dev, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
            input_sync(dev);
            return 1;
      }

      return 0;
}

static void wacom_intuos_general(struct urb *urb)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      unsigned int t;

      /* general pen packet */
      if ((data[1] & 0xb8) == 0xa0)
      {
            t = ((__u32)data[6] << 2) | ((data[7] >> 6) & 3);
            input_report_abs(dev, ABS_PRESSURE, t);
            input_report_abs(dev, ABS_TILT_X,
                        ((data[7] << 1) & 0x7e) | (data[8] >> 7));
            input_report_abs(dev, ABS_TILT_Y, data[8] & 0x7f);
            input_report_key(dev, BTN_STYLUS, data[1] & 2);
            input_report_key(dev, BTN_STYLUS2, data[1] & 4);
            input_report_key(dev, BTN_TOUCH, t > 10);
      }

      /* airbrush second packet */
      if ((data[1] & 0xbc) == 0xb4)
      {
            input_report_abs(dev, ABS_WHEEL,
                        ((__u32)data[6] << 2) | ((data[7] >> 6) & 3));
            input_report_abs(dev, ABS_TILT_X,
                        ((data[7] << 1) & 0x7e) | (data[8] >> 7));
            input_report_abs(dev, ABS_TILT_Y, data[8] & 0x7f);
      }
      return;
}

static void wacom_intuos_irq(struct urb *urb, struct pt_regs *regs)
{
      struct wacom *wacom = urb->context;
      unsigned char *data = wacom->data;
      struct input_dev *dev = &wacom->dev;
      unsigned int t;
      int idx;
      int retval;

      switch (urb->status) {
      case 0:
            /* success */
            break;
      case -ECONNRESET:
      case -ENOENT:
      case -ESHUTDOWN:
            /* this urb is terminated, clean up */
            dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
            return;
      default:
            dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
            goto exit;
      }

      if (data[0] != 2 && data[0] != 5 && data[0] != 6) {
            dbg("wacom_intuos_irq: received unknown report #%d", data[0]);
            return;
      }

      input_regs(dev, regs);

      /* tool number */
      idx = data[1] & 0x01;

      /* process in/out prox events */
      if (wacom_intuos_inout(urb)) goto exit;

      input_report_abs(dev, ABS_X, ((__u32)data[2] << 8) | data[3]);
      input_report_abs(dev, ABS_Y, ((__u32)data[4] << 8) | data[5]);
      input_report_abs(dev, ABS_DISTANCE, data[9]);
      
      /* process general packets */
      wacom_intuos_general(urb);

      if ((data[1] & 0xbc) == 0xa8 || (data[1] & 0xbe) == 0xb0) {       /* 4D mouse or Lens cursor packets */

            if (data[1] & 0x02) {                                 /* Rotation packet */
                  t = ((__u32)data[6] << 3) | ((data[7] >> 5) & 7);
                  input_report_abs(dev, ABS_RZ, (data[7] & 0x20) ? ((t - 1) / 2) : -t / 2);
            } else {

                  if ((data[1] & 0x10) == 0) {                    /* 4D mouse packets */
                        input_report_key(dev, BTN_LEFT,   data[8] & 0x01);
                        input_report_key(dev, BTN_MIDDLE, data[8] & 0x02);
                        input_report_key(dev, BTN_RIGHT,  data[8] & 0x04);

                        input_report_key(dev, BTN_SIDE,   data[8] & 0x20);
                        input_report_key(dev, BTN_EXTRA,  data[8] & 0x10);
                        t = ((__u32)data[6] << 2) | ((data[7] >> 6) & 3);
                        input_report_abs(dev, ABS_THROTTLE, (data[8] & 0x08) ? -t : t);
                  } else {
                        if (wacom->tool[idx] == BTN_TOOL_MOUSE) { /* 2D mouse packets */  
                              input_report_key(dev, BTN_LEFT,   data[8] & 0x04);
                              input_report_key(dev, BTN_MIDDLE, data[8] & 0x08);
                              input_report_key(dev, BTN_RIGHT,  data[8] & 0x10);
                              input_report_rel(dev, REL_WHEEL, (__u32)((data[8] & 0x02) >> 1)
                                     - (__u32)(data[8] & 0x01));
                        }
                        else {                                    /* Lens cursor packets */
                              input_report_key(dev, BTN_LEFT,   data[8] & 0x01);
                              input_report_key(dev, BTN_MIDDLE, data[8] & 0x02);
                              input_report_key(dev, BTN_RIGHT,  data[8] & 0x04);
                              input_report_key(dev, BTN_SIDE,   data[8] & 0x10);
                              input_report_key(dev, BTN_EXTRA,  data[8] & 0x08);
                        }
                  }
            }
      }
      
        input_report_key(dev, wacom->tool[idx], 1);
        input_event(dev, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
      input_sync(dev);

exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                 __FUNCTION__, retval);
}

static void wacom_intuos3_irq(struct urb *urb, struct pt_regs *regs)
{
        struct wacom *wacom = urb->context;
        unsigned char *data = wacom->data;
        struct input_dev *dev = &wacom->dev;
        unsigned int t;
        int idx, retval;

        switch (urb->status) {
        case 0:
                /* success */
                break;
        case -ECONNRESET:
        case -ENOENT:
        case -ESHUTDOWN:
                /* this urb is terminated, clean up */
                dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
                return;
      default:
            dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
            goto exit;
      }

      /* check for valid report */
      if (data[0] != 2 && data[0] != 5 && data[0] != 12)
      {
            printk(KERN_INFO "wacom_intuos3_irq: received unknown report #%d\n", data[0]);
            return;
        }
      input_regs(dev, regs);

      /* tool index is always 0 here since there is no dual input tool */
      idx = data[1] & 0x01;

      /* pad packets. Works as a second tool and is alway in prox */
      if (data[0] == 12)
      {
            /* initiate the pad as a device */
            if (wacom->tool[1] != BTN_TOOL_FINGER)
            {
                  wacom->tool[1] = BTN_TOOL_FINGER;
                  input_report_key(dev, wacom->tool[1], 1);
            }
            input_report_key(dev, BTN_0, (data[5] & 0x01));
            input_report_key(dev, BTN_1, (data[5] & 0x02));
            input_report_key(dev, BTN_2, (data[5] & 0x04));
            input_report_key(dev, BTN_3, (data[5] & 0x08));
            input_report_key(dev, BTN_4, (data[6] & 0x01));
            input_report_key(dev, BTN_5, (data[6] & 0x02));
            input_report_key(dev, BTN_6, (data[6] & 0x04));
            input_report_key(dev, BTN_7, (data[6] & 0x08));
            input_report_abs(dev, ABS_RX, ((data[1] & 0x1f) << 8) | data[2]);
            input_report_abs(dev, ABS_RY, ((data[3] & 0x1f) << 8) | data[4]);
            input_event(dev, EV_MSC, MSC_SERIAL, 0xffffffff);
            input_sync(dev);
            goto exit;
      }

      /* process in/out prox events */
      if (wacom_intuos_inout(urb)) goto exit;

      input_report_abs(dev, ABS_X, ((__u32)data[2] << 9) | ((__u32)data[3] << 1) | ((data[9] >> 1) & 1));
      input_report_abs(dev, ABS_Y, ((__u32)data[4] << 9) | ((__u32)data[5] << 1) | (data[9] & 1));
      input_report_abs(dev, ABS_DISTANCE, ((data[9] >> 2) & 0x3f));

      /* process general packets */
      wacom_intuos_general(urb);

      if ((data[1] & 0xbc) == 0xa8 || (data[1] & 0xbe) == 0xb0)
      {
            /* Marker pen rotation packet. Reported as wheel due to valuator limitation */
            if (data[1] & 0x02)
            {
                  t = ((__u32)data[6] << 3) | ((data[7] >> 5) & 7);
                  t = (data[7] & 0x20) ? ((t > 900) ? ((t-1) / 2 - 1350) :
                        ((t-1) / 2 + 450)) : (450 - t / 2) ;
                  input_report_abs(dev, ABS_WHEEL, t);
            }

            /* 2D mouse packets */
            if (wacom->tool[idx] == BTN_TOOL_MOUSE)
            {
                  input_report_key(dev, BTN_LEFT,   data[8] & 0x04);
                  input_report_key(dev, BTN_MIDDLE, data[8] & 0x08);
                  input_report_key(dev, BTN_RIGHT,  data[8] & 0x10);
                  input_report_key(dev, BTN_SIDE,   data[8] & 0x40);
                  input_report_key(dev, BTN_EXTRA,  data[8] & 0x20);
                  /* mouse wheel is positive when rolled backwards */
                  input_report_rel(dev, REL_WHEEL,  ((__u32)((data[8] & 0x02) >> 1)
                               - (__u32)(data[8] & 0x01)));
            }
      }

      input_report_key(dev, wacom->tool[idx], 1);
      input_event(dev, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
      input_sync(dev);

exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                  __FUNCTION__, retval);
}

struct wacom_features wacom_features[] = {
      { "Wacom Penpartner",    7,   5040,  3780,  255, 32, 0, wacom_penpartner_irq },
        { "Wacom Graphire",      8,  10206,  7422,  511, 32, 1, wacom_graphire_irq },
      { "Wacom Graphire2 4x5", 8,  10206,  7422,  511, 32, 1, wacom_graphire_irq },
      { "Wacom Graphire2 5x7", 8,  13918, 10206,  511, 32, 1, wacom_graphire_irq },
        { "Wacom Graphire3 4x5", 8,  10208,  7424,  511, 32, 1, wacom_graphire_irq },
        { "Wacom Graphire3 6x8", 8,  16704, 12064,  511, 32, 1, wacom_graphire_irq },
      { "Wacom Intuos 4x5",   10,  12700, 10600, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos 6x8",   10,  20320, 16240, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos 9x12",  10,  30480, 24060, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos 12x12", 10,  30480, 31680, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos 12x18", 10,  45720, 31680, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom PL400",         8,   5408,  4056,  255, 32, 3, wacom_pl_irq },
      { "Wacom PL500",         8,   6144,  4608,  255, 32, 3, wacom_pl_irq },
      { "Wacom PL600",         8,   6126,  4604,  255, 32, 3, wacom_pl_irq },
      { "Wacom PL600SX",       8,   6260,  5016,  255, 32, 3, wacom_pl_irq },
      { "Wacom PL550",         8,   6144,  4608,  511, 32, 3, wacom_pl_irq },
      { "Wacom PL800",         8,   7220,  5780,  511, 32, 3, wacom_pl_irq },
      { "Wacom Intuos2 4x5",   10, 12700, 10600, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos2 6x8",   10, 20320, 16240, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos2 9x12",  10, 30480, 24060, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos2 12x12", 10, 30480, 31680, 1023, 15, 2, wacom_intuos_irq },
      { "Wacom Intuos2 12x18", 10, 45720, 31680, 1023, 15, 2, wacom_intuos_irq },
        { "Wacom Volito",        8,   5104,  3712,  511, 32, 1, wacom_graphire_irq },
        { "Wacom Cintiq Partner",8,  20480, 15360,  511, 32, 3, wacom_ptu_irq },
      { "Wacom Intuos3 4x5",   10, 25400, 20320, 1023, 15, 4, wacom_intuos3_irq },
      { "Wacom Intuos3 6x8",   10, 40640, 30480, 1023, 15, 4, wacom_intuos3_irq },
      { "Wacom Intuos3 9x12",  10, 60960, 45720, 1023, 15, 4, wacom_intuos3_irq },
      { "Wacom Intuos2 6x8",   10, 20320, 16240, 1023, 15, 2, wacom_intuos_irq },
      { }
};

struct usb_device_id wacom_ids[] = {
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x00) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x10) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x11) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x12) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x13) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x14) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x20) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x21) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x22) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x23) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x24) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x30) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x31) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x32) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x33) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x34) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x35) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x41) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x42) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x43) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x44) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x45) },
      { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x60) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x03) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB0) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB1) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB2) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x47) },
      { }
};

MODULE_DEVICE_TABLE(usb, wacom_ids);

static int wacom_open(struct input_dev *dev)
{
      struct wacom *wacom = dev->private;

      if (wacom->open++)
            return 0;

      wacom->irq->dev = wacom->usbdev;
      if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
            wacom->open--;
            return -EIO;
      }
      return 0;
}

static void wacom_close(struct input_dev *dev)
{
      struct wacom *wacom = dev->private;

      if (!--wacom->open)
            usb_unlink_urb(wacom->irq);
}

static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
      struct usb_device *dev = interface_to_usbdev(intf);
      struct usb_endpoint_descriptor *endpoint;
      char rep_data[2] = {0x02, 0x02};
      struct wacom *wacom;
      char path[64];

      if (!(wacom = kmalloc(sizeof(struct wacom), GFP_KERNEL)))
            return -ENOMEM;
      memset(wacom, 0, sizeof(struct wacom));

      wacom->data = usb_buffer_alloc(dev, 10, SLAB_ATOMIC, &wacom->data_dma);
      if (!wacom->data) {
            kfree(wacom);
            return -ENOMEM;
      }
      
      wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
      if (!wacom->irq) {
            usb_buffer_free(dev, 10, wacom->data, wacom->data_dma);
            kfree(wacom);
            return -ENOMEM;
      }

      wacom->features = wacom_features + (id - wacom_ids);

      wacom->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS);
      wacom->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
      wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH) | BIT(BTN_STYLUS);

      switch (wacom->features->type) {
            case 1:
                  wacom->dev.evbit[0] |= BIT(EV_REL);
                  wacom->dev.relbit[0] |= BIT(REL_WHEEL);
                  wacom->dev.absbit[0] |= BIT(ABS_DISTANCE);
                  wacom->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
                  wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE) | BIT(BTN_STYLUS2);
                  break;

            case 4: /* new functions for Intuos3 */
                  wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_FINGER);
                  wacom->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_0) | BIT(BTN_1) | BIT(BTN_2) | BIT(BTN_3) | BIT(BTN_4) | BIT(BTN_5) | BIT(BTN_6) | BIT(BTN_7);
                  wacom->dev.absbit[0] |= BIT(ABS_RX) | BIT(ABS_RY);
                  /* fall through */
            case 2:
                  wacom->dev.evbit[0] |= BIT(EV_MSC) | BIT(EV_REL);
                  wacom->dev.relbit[0] |= BIT(REL_WHEEL);
                  wacom->dev.mscbit[0] |= BIT(MSC_SERIAL);
                  wacom->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE) | BIT(BTN_SIDE) | BIT(BTN_EXTRA);
                  wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE)     | BIT(BTN_TOOL_BRUSH)
                                            | BIT(BTN_TOOL_PENCIL) | BIT(BTN_TOOL_AIRBRUSH) | BIT(BTN_TOOL_LENS) | BIT(BTN_STYLUS2);
                  wacom->dev.absbit[0] |= BIT(ABS_DISTANCE) | BIT(ABS_WHEEL) | BIT(ABS_TILT_X) | BIT(ABS_TILT_Y) | BIT(ABS_RZ) | BIT(ABS_THROTTLE);
                  break;

            case 3:
                  wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_STYLUS2) | BIT(BTN_TOOL_RUBBER);
                  break;
      }

      wacom->dev.absmax[ABS_X] = wacom->features->x_max;
      wacom->dev.absmax[ABS_Y] = wacom->features->y_max;
      wacom->dev.absmax[ABS_PRESSURE] = wacom->features->pressure_max;
      wacom->dev.absmax[ABS_DISTANCE] = wacom->features->distance_max;
      wacom->dev.absmax[ABS_TILT_X] = 127;
      wacom->dev.absmax[ABS_TILT_Y] = 127;
      wacom->dev.absmax[ABS_WHEEL] = 1023;

      wacom->dev.absmax[ABS_RX] = 4097;
      wacom->dev.absmax[ABS_RY] = 4097;
      wacom->dev.absmin[ABS_RZ] = -900;
      wacom->dev.absmax[ABS_RZ] = 899;
      wacom->dev.absmin[ABS_THROTTLE] = -1023;
      wacom->dev.absmax[ABS_THROTTLE] = 1023;

      wacom->dev.absfuzz[ABS_X] = 4;
      wacom->dev.absfuzz[ABS_Y] = 4;

      wacom->dev.private = wacom;
      wacom->dev.open = wacom_open;
      wacom->dev.close = wacom_close;

      usb_make_path(dev, path, 64);
      sprintf(wacom->phys, "%s/input0", path);

      wacom->dev.name = wacom->features->name;
      wacom->dev.phys = wacom->phys;
      wacom->dev.id.bustype = BUS_USB;
      wacom->dev.id.vendor = dev->descriptor.idVendor;
      wacom->dev.id.product = dev->descriptor.idProduct;
      wacom->dev.id.version = dev->descriptor.bcdDevice;
      wacom->usbdev = dev;
      wacom->dev.dev = &intf->dev;

      endpoint = &intf->altsetting[0].endpoint[0].desc;

      if (wacom->features->pktlen > 10)
            BUG();

      usb_fill_int_urb(wacom->irq, dev,
                   usb_rcvintpipe(dev, endpoint->bEndpointAddress),
                   wacom->data, wacom->features->pktlen,
                   wacom->features->irq, wacom, endpoint->bInterval);
      wacom->irq->transfer_dma = wacom->data_dma;
      wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

      input_register_device(&wacom->dev);

      /* ask the tablet to report tablet data */
      usb_set_report(intf, 3, 2, rep_data, 2);
      /* repeat once (not sure why the first call often fails) */
      usb_set_report(intf, 3, 2, rep_data, 2);

      printk(KERN_INFO "input: %s on %s\n", wacom->features->name, path);

      usb_set_intfdata(intf, wacom);

      return 0;
}

static void wacom_disconnect(struct usb_interface *intf)
{
      struct wacom *wacom = usb_get_intfdata (intf);

      usb_set_intfdata(intf, NULL);
      if (wacom) {
            usb_unlink_urb(wacom->irq);
            input_unregister_device(&wacom->dev);
            usb_free_urb(wacom->irq);
            usb_buffer_free(interface_to_usbdev(intf), 10, wacom->data, wacom->data_dma);
            kfree(wacom);
      }
}

static struct usb_driver wacom_driver = {
      .owner =    THIS_MODULE,
      .name =           "wacom",
      .probe =    wacom_probe,
      .disconnect =     wacom_disconnect,
      .id_table = wacom_ids,
};

static int __init wacom_init(void)
{
      int result = usb_register(&wacom_driver);
      if (result == 0)
            info(DRIVER_VERSION ":" DRIVER_DESC);
      return result;
}

static void __exit wacom_exit(void)
{
      usb_deregister(&wacom_driver);
}

module_init(wacom_init);
module_exit(wacom_exit);

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