/*
 * drivers/input/tablet/wacom_wac.c
 *
 *  USB Wacom Graphire and Wacom Intuos tablet support - Wacom specific code
 *
 */

/*
 * 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 "wacom.h"
#include "wacom_wac.h"

static int wacom_penpartner_irq(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;

        switch (data[0]) {
                case 1:
                        if (data[5] & 0x80) {
                                wacom->tool[0] = (data[5] & 0x20) ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
                                wacom->id[0] = (data[5] & 0x20) ? ERASER_DEVICE_ID : STYLUS_DEVICE_ID;
                                wacom_report_key(wcombo, wacom->tool[0], 1);
                                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]); /* report tool id */
                                wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[1]));
                                wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[3]));
                                wacom_report_abs(wcombo, ABS_PRESSURE, (signed char)data[6] + 127);
                                wacom_report_key(wcombo, BTN_TOUCH, ((signed char)data[6] > -127));
                                wacom_report_key(wcombo, BTN_STYLUS, (data[5] & 0x40));
                        } else {
                                wacom_report_key(wcombo, wacom->tool[0], 0);
                                wacom_report_abs(wcombo, ABS_MISC, 0); /* report tool id */
                                wacom_report_abs(wcombo, ABS_PRESSURE, -1);
                                wacom_report_key(wcombo, BTN_TOUCH, 0);
                        }
                        break;
                case 2:
                        wacom_report_key(wcombo, BTN_TOOL_PEN, 1);
                        wacom_report_abs(wcombo, ABS_MISC, STYLUS_DEVICE_ID); /* report tool id */
                        wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[1]));
                        wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[3]));
                        wacom_report_abs(wcombo, ABS_PRESSURE, (signed char)data[6] + 127);
                        wacom_report_key(wcombo, BTN_TOUCH, ((signed char)data[6] > -80) && !(data[5] & 0x20));
                        wacom_report_key(wcombo, BTN_STYLUS, (data[5] & 0x40));
                        break;
                default:
                        printk(KERN_INFO "wacom_penpartner_irq: received unknown report #%d\n", data[0]);
                        return 0;
        }
        return 1;
}

static int wacom_pl_irq(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;
        int prox, pressure;

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

        prox = data[1] & 0x40;

        wacom->id[0] = ERASER_DEVICE_ID;
        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]) {
                        /* Eraser bit set for DTF */
                        if (data[1] & 0x10)
                                wacom->tool[1] = BTN_TOOL_RUBBER;
                        else
                                /* 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 */
                                wacom_report_key(wcombo, wacom->tool[1], 0);
                                wacom_input_sync(wcombo);
                                wacom->tool[1] = BTN_TOOL_PEN;
                                return 0;
                        }
                }
                if (wacom->tool[1] != BTN_TOOL_RUBBER) {
                        /* Unknown tool selected default to pen tool */
                        wacom->tool[1] = BTN_TOOL_PEN;
                        wacom->id[0] = STYLUS_DEVICE_ID;
                }
                wacom_report_key(wcombo, wacom->tool[1], prox); /* report in proximity for tool */
                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]); /* report tool id */
                wacom_report_abs(wcombo, ABS_X, data[3] | (data[2] << 7) | ((data[1] & 0x03) << 14));
                wacom_report_abs(wcombo, ABS_Y, data[6] | (data[5] << 7) | ((data[4] & 0x03) << 14));
                wacom_report_abs(wcombo, ABS_PRESSURE, pressure);

                wacom_report_key(wcombo, BTN_TOUCH, data[4] & 0x08);
                wacom_report_key(wcombo, BTN_STYLUS, data[4] & 0x10);
                /* Only allow the stylus2 button to be reported for the pen tool. */
                wacom_report_key(wcombo, 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;
                }
                wacom_report_key(wcombo, wacom->tool[1], prox);
        }

        wacom->tool[0] = prox; /* Save proximity state */
        return 1;
}

static int wacom_ptu_irq(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;

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

        if (data[1] & 0x04) {
                wacom_report_key(wcombo, BTN_TOOL_RUBBER, data[1] & 0x20);
                wacom_report_key(wcombo, BTN_TOUCH, data[1] & 0x08);
                wacom->id[0] = ERASER_DEVICE_ID;
        } else {
                wacom_report_key(wcombo, BTN_TOOL_PEN, data[1] & 0x20);
                wacom_report_key(wcombo, BTN_TOUCH, data[1] & 0x01);
                wacom->id[0] = STYLUS_DEVICE_ID;
        }
        wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]); /* report tool id */
        wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[2]));
        wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
        wacom_report_abs(wcombo, ABS_PRESSURE, wacom_le16_to_cpu(&data[6]));
        wacom_report_key(wcombo, BTN_STYLUS, data[1] & 0x02);
        wacom_report_key(wcombo, BTN_STYLUS2, data[1] & 0x10);
        return 1;
}

static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;
        int x, y, rw;

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

        if (data[1] & 0x80) {
                /* in prox and not a pad data */

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

                        case 0: /* Pen */
                                wacom->tool[0] = BTN_TOOL_PEN;
                                wacom->id[0] = STYLUS_DEVICE_ID;
                                break;

                        case 1: /* Rubber */
                                wacom->tool[0] = BTN_TOOL_RUBBER;
                                wacom->id[0] = ERASER_DEVICE_ID;
                                break;

                        case 2: /* Mouse with wheel */
                                wacom_report_key(wcombo, BTN_MIDDLE, data[1] & 0x04);
                                if (wacom->features->type == WACOM_G4 ||
                                                wacom->features->type == WACOM_MO) {
                                        rw = data[7] & 0x04 ? (data[7] & 0x03)-4 : (data[7] & 0x03);
                                        wacom_report_rel(wcombo, REL_WHEEL, -rw);
                                } else
                                        wacom_report_rel(wcombo, REL_WHEEL, -(signed char) data[6]);
                                /* fall through */

                        case 3: /* Mouse without wheel */
                                wacom->tool[0] = BTN_TOOL_MOUSE;
                                wacom->id[0] = CURSOR_DEVICE_ID;
                                wacom_report_key(wcombo, BTN_LEFT, data[1] & 0x01);
                                wacom_report_key(wcombo, BTN_RIGHT, data[1] & 0x02);
                                if (wacom->features->type == WACOM_G4 ||
                                                wacom->features->type == WACOM_MO)
                                        wacom_report_abs(wcombo, ABS_DISTANCE, data[6] & 0x3f);
                                else
                                        wacom_report_abs(wcombo, ABS_DISTANCE, data[7] & 0x3f);
                                break;
                }
                x = wacom_le16_to_cpu(&data[2]);
                y = wacom_le16_to_cpu(&data[4]);
                wacom_report_abs(wcombo, ABS_X, x);
                wacom_report_abs(wcombo, ABS_Y, y);
                if (wacom->tool[0] != BTN_TOOL_MOUSE) {
                        wacom_report_abs(wcombo, ABS_PRESSURE, data[6] | ((data[7] & 0x01) << 8));
                        wacom_report_key(wcombo, BTN_TOUCH, data[1] & 0x01);
                        wacom_report_key(wcombo, BTN_STYLUS, data[1] & 0x02);
                        wacom_report_key(wcombo, BTN_STYLUS2, data[1] & 0x04);
                }
                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]); /* report tool id */
                wacom_report_key(wcombo, wacom->tool[0], 1);
        } else if (wacom->id[0]) {
                wacom_report_abs(wcombo, ABS_X, 0);
                wacom_report_abs(wcombo, ABS_Y, 0);
                if (wacom->tool[0] == BTN_TOOL_MOUSE) {
                        wacom_report_key(wcombo, BTN_LEFT, 0);
                        wacom_report_key(wcombo, BTN_RIGHT, 0);
                        wacom_report_abs(wcombo, ABS_DISTANCE, 0);
                } else {
                        wacom_report_abs(wcombo, ABS_PRESSURE, 0);
                        wacom_report_key(wcombo, BTN_TOUCH, 0);
                        wacom_report_key(wcombo, BTN_STYLUS, 0);
                        wacom_report_key(wcombo, BTN_STYLUS2, 0);
                }
                wacom->id[0] = 0;
                wacom_report_abs(wcombo, ABS_MISC, 0); /* reset tool id */
                wacom_report_key(wcombo, wacom->tool[0], 0);
        }

        /* send pad data */
        switch (wacom->features->type) {
            case WACOM_G4:
                if (data[7] & 0xf8) {
                        wacom_input_sync(wcombo); /* sync last event */
                        wacom->id[1] = PAD_DEVICE_ID;
                        wacom_report_key(wcombo, BTN_0, (data[7] & 0x40));
                        wacom_report_key(wcombo, BTN_4, (data[7] & 0x80));
                        rw = ((data[7] & 0x18) >> 3) - ((data[7] & 0x20) >> 3);
                        wacom_report_rel(wcombo, REL_WHEEL, rw);
                        wacom_report_key(wcombo, BTN_TOOL_FINGER, 0xf0);
                        wacom_report_abs(wcombo, ABS_MISC, wacom->id[1]);
                        wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                } else if (wacom->id[1]) {
                        wacom_input_sync(wcombo); /* sync last event */
                        wacom->id[1] = 0;
                        wacom_report_key(wcombo, BTN_0, (data[7] & 0x40));
                        wacom_report_key(wcombo, BTN_4, (data[7] & 0x80));
                        wacom_report_key(wcombo, BTN_TOOL_FINGER, 0);
                        wacom_report_abs(wcombo, ABS_MISC, 0);
                        wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                }
                break;
            case WACOM_MO:
                if ((data[7] & 0xf8) || (data[8] & 0xff)) {
                        wacom_input_sync(wcombo); /* sync last event */
                        wacom->id[1] = PAD_DEVICE_ID;
                        wacom_report_key(wcombo, BTN_0, (data[7] & 0x08));
                        wacom_report_key(wcombo, BTN_1, (data[7] & 0x20));
                        wacom_report_key(wcombo, BTN_4, (data[7] & 0x10));
                        wacom_report_key(wcombo, BTN_5, (data[7] & 0x40));
                        wacom_report_abs(wcombo, ABS_WHEEL, (data[8] & 0x7f));
                        wacom_report_key(wcombo, BTN_TOOL_FINGER, 0xf0);
                        wacom_report_abs(wcombo, ABS_MISC, wacom->id[1]);
                        wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                } else if (wacom->id[1]) {
                        wacom_input_sync(wcombo); /* sync last event */
                        wacom->id[1] = 0;
                        wacom_report_key(wcombo, BTN_0, (data[7] & 0x08));
                        wacom_report_key(wcombo, BTN_1, (data[7] & 0x20));
                        wacom_report_key(wcombo, BTN_4, (data[7] & 0x10));
                        wacom_report_key(wcombo, BTN_5, (data[7] & 0x40));
                        wacom_report_abs(wcombo, ABS_WHEEL, (data[8] & 0x7f));
                        wacom_report_key(wcombo, BTN_TOOL_FINGER, 0);
                        wacom_report_abs(wcombo, ABS_MISC, 0);
                        wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xf0);
                }
                break;
        }
        return 1;
}

static int wacom_intuos_inout(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;
        int idx;

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

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

                wacom->id[idx] = (data[2] << 4) | (data[3] >> 4);
                switch (wacom->id[idx]) {
                        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:
                        case 0x912:
                        case 0x112:
                        case 0x913: /* Intuos3 Airbrush */
                                wacom->tool[idx] = BTN_TOOL_AIRBRUSH;
                                break;
                        default: /* Unknown tool */
                                wacom->tool[idx] = BTN_TOOL_PEN;
                }
                return 1;
        }

        /* Exit report */
        if ((data[1] & 0xfe) == 0x80) {
                wacom_report_abs(wcombo, ABS_X, 0);
                wacom_report_abs(wcombo, ABS_Y, 0);
                wacom_report_abs(wcombo, ABS_DISTANCE, 0);
                if (wacom->tool[idx] >= BTN_TOOL_MOUSE) {
                        wacom_report_key(wcombo, BTN_LEFT, 0);
                        wacom_report_key(wcombo, BTN_MIDDLE, 0);
                        wacom_report_key(wcombo, BTN_RIGHT, 0);
                        wacom_report_key(wcombo, BTN_SIDE, 0);
                        wacom_report_key(wcombo, BTN_EXTRA, 0);
                        wacom_report_abs(wcombo, ABS_THROTTLE, 0);
                        wacom_report_abs(wcombo, ABS_RZ, 0);
                } else {
                        wacom_report_abs(wcombo, ABS_PRESSURE, 0);
                        wacom_report_abs(wcombo, ABS_TILT_X, 0);
                        wacom_report_abs(wcombo, ABS_TILT_Y, 0);
                        wacom_report_key(wcombo, BTN_STYLUS, 0);
                        wacom_report_key(wcombo, BTN_STYLUS2, 0);
                        wacom_report_key(wcombo, BTN_TOUCH, 0);
                        wacom_report_abs(wcombo, ABS_WHEEL, 0);
                }
                wacom_report_key(wcombo, wacom->tool[idx], 0);
                wacom_report_abs(wcombo, ABS_MISC, 0); /* reset tool id */
                wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
                return 2;
        }
        return 0;
}

static void wacom_intuos_general(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;
        unsigned int t;

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

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

static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
{
        unsigned char *data = wacom->data;
        unsigned int t;
        int idx, result;

        if (data[0] != 2 && data[0] != 5 && data[0] != 6 && data[0] != 12) {
                dbg("wacom_intuos_irq: received unknown report #%d", data[0]);
                return 0;
        }

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

        /* pad packets. Works as a second tool and is always 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;

                wacom_report_key(wcombo, BTN_0, (data[5] & 0x01));
                wacom_report_key(wcombo, BTN_1, (data[5] & 0x02));
                wacom_report_key(wcombo, BTN_2, (data[5] & 0x04));
                wacom_report_key(wcombo, BTN_3, (data[5] & 0x08));
                wacom_report_key(wcombo, BTN_4, (data[6] & 0x01));
                wacom_report_key(wcombo, BTN_5, (data[6] & 0x02));
                wacom_report_key(wcombo, BTN_6, (data[6] & 0x04));
                wacom_report_key(wcombo, BTN_7, (data[6] & 0x08));
                wacom_report_key(wcombo, BTN_8, (data[5] & 0x10));
                wacom_report_key(wcombo, BTN_9, (data[6] & 0x10));
                wacom_report_abs(wcombo, ABS_RX, ((data[1] & 0x1f) << 8) | data[2]);
                wacom_report_abs(wcombo, ABS_RY, ((data[3] & 0x1f) << 8) | data[4]);

                if ((data[5] & 0x1f) | (data[6] & 0x1f) | (data[1] & 0x1f) |
                        data[2] | (data[3] & 0x1f) | data[4])
                        wacom_report_key(wcombo, wacom->tool[1], 1);
                else
                        wacom_report_key(wcombo, wacom->tool[1], 0);
                wacom_report_abs(wcombo, ABS_MISC, PAD_DEVICE_ID);
                wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, 0xffffffff);
                return 1;
        }

        /* process in/out prox events */
        result = wacom_intuos_inout(wacom, wcombo);
        if (result)
                return result-1;

        /* Only large I3 and I1 & I2 support Lense Cursor */
        if ((wacom->tool[idx] == BTN_TOOL_LENS)
                        && ((wacom->features->type == INTUOS3)
                        || (wacom->features->type == INTUOS3S)))
                return 0;

        /* Cintiq doesn't send data when RDY bit isn't set */
        if ((wacom->features->type == CINTIQ) && !(data[1] & 0x40))
                 return 0;

        if (wacom->features->type >= INTUOS3S) {
                wacom_report_abs(wcombo, ABS_X, (data[2] << 9) | (data[3] << 1) | ((data[9] >> 1) & 1));
                wacom_report_abs(wcombo, ABS_Y, (data[4] << 9) | (data[5] << 1) | (data[9] & 1));
                wacom_report_abs(wcombo, ABS_DISTANCE, ((data[9] >> 2) & 0x3f));
        } else {
                wacom_report_abs(wcombo, ABS_X, wacom_be16_to_cpu(&data[2]));
                wacom_report_abs(wcombo, ABS_Y, wacom_be16_to_cpu(&data[4]));
                wacom_report_abs(wcombo, ABS_DISTANCE, ((data[9] >> 3) & 0x1f));
        }

        /* process general packets */
        wacom_intuos_general(wacom, wcombo);

        /* 4D mouse, 2D mouse, marker pen rotation, or Lens cursor packets */
        if ((data[1] & 0xbc) == 0xa8 || (data[1] & 0xbe) == 0xb0) {

                if (data[1] & 0x02) {
                        /* Rotation packet */
                        if (wacom->features->type >= INTUOS3S) {
                                /* I3 marker pen rotation */
                                t = (data[6] << 3) | ((data[7] >> 5) & 7);
                                t = (data[7] & 0x20) ? ((t > 900) ? ((t-1) / 2 - 1350) :
                                        ((t-1) / 2 + 450)) : (450 - t / 2) ;
                                wacom_report_abs(wcombo, ABS_Z, t);
                        } else {
                                /* 4D mouse rotation packet */
                                t = (data[6] << 3) | ((data[7] >> 5) & 7);
                                wacom_report_abs(wcombo, ABS_RZ, (data[7] & 0x20) ?
                                        ((t - 1) / 2) : -t / 2);
                        }

                } else if (!(data[1] & 0x10) && wacom->features->type < INTUOS3S) {
                        /* 4D mouse packet */
                        wacom_report_key(wcombo, BTN_LEFT,   data[8] & 0x01);
                        wacom_report_key(wcombo, BTN_MIDDLE, data[8] & 0x02);
                        wacom_report_key(wcombo, BTN_RIGHT,  data[8] & 0x04);

                        wacom_report_key(wcombo, BTN_SIDE,   data[8] & 0x20);
                        wacom_report_key(wcombo, BTN_EXTRA,  data[8] & 0x10);
                        t = (data[6] << 2) | ((data[7] >> 6) & 3);
                        wacom_report_abs(wcombo, ABS_THROTTLE, (data[8] & 0x08) ? -t : t);

                } else if (wacom->tool[idx] == BTN_TOOL_MOUSE) {
                        /* 2D mouse packet */
                        wacom_report_key(wcombo, BTN_LEFT,   data[8] & 0x04);
                        wacom_report_key(wcombo, BTN_MIDDLE, data[8] & 0x08);
                        wacom_report_key(wcombo, BTN_RIGHT,  data[8] & 0x10);
                        wacom_report_rel(wcombo, REL_WHEEL, (data[8] & 0x01)
                                                 - ((data[8] & 0x02) >> 1));

                        /* I3 2D mouse side buttons */
                        if (wacom->features->type >= INTUOS3S && wacom->features->type <= INTUOS3L) {
                                wacom_report_key(wcombo, BTN_SIDE,   data[8] & 0x40);
                                wacom_report_key(wcombo, BTN_EXTRA,  data[8] & 0x20);
                        }

                } else if (wacom->features->type < INTUOS3S || wacom->features->type == INTUOS3L) {
                        /* Lens cursor packets */
                        wacom_report_key(wcombo, BTN_LEFT,   data[8] & 0x01);
                        wacom_report_key(wcombo, BTN_MIDDLE, data[8] & 0x02);
                        wacom_report_key(wcombo, BTN_RIGHT,  data[8] & 0x04);
                        wacom_report_key(wcombo, BTN_SIDE,   data[8] & 0x10);
                        wacom_report_key(wcombo, BTN_EXTRA,  data[8] & 0x08);
                }
        }

        wacom_report_abs(wcombo, ABS_MISC, wacom->id[idx]); /* report tool id */
        wacom_report_key(wcombo, wacom->tool[idx], 1);
        wacom_input_event(wcombo, EV_MSC, MSC_SERIAL, wacom->serial[idx]);
        return 1;
}

static int wacom_tpc_irq(struct wacom_wac *wacom, void *wcombo)
{
        char *data = wacom->data;
        int prox = 0, pressure;
        static int stylusInProx, touchInProx = 1, touchOut;
        struct urb *urb = ((struct wacom_combo *)wcombo)->urb;

        dbg("wacom_tpc_irq: received report #%d", data[0]);

        if (urb->actual_length == 5 || data[0] == 6) { /* Touch data */
                if (urb->actual_length == 5) {  /* with touch */
                        prox = data[0] & 0x03;
                } else {  /* with capacity */
                        prox = data[1] & 0x03;
                }

                if (!stylusInProx) { /* stylus not in prox */
                        if (prox) {
                                if (touchInProx) {
                                        wacom->tool[1] = BTN_TOOL_DOUBLETAP;
                                        wacom->id[0] = TOUCH_DEVICE_ID;
                                        if (urb->actual_length != 5) {
                                                wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[2]));
                                                wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
                                                wacom_report_abs(wcombo, ABS_PRESSURE, wacom_le16_to_cpu(&data[6]));
                                                wacom_report_key(wcombo, BTN_TOUCH, wacom_le16_to_cpu(&data[6]));
                                        } else {
                                                wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[1]));
                                                wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[3]));
                                                wacom_report_key(wcombo, BTN_TOUCH, 1);
                                        }
                                        wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
                                        wacom_report_key(wcombo, wacom->tool[1], prox & 0x01);
                                        touchOut = 1;
                                        return 1;
                                }
                        } else {
                                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
                                wacom_report_key(wcombo, wacom->tool[1], prox & 0x01);
                                wacom_report_key(wcombo, BTN_TOUCH, 0);
                                touchOut = 0;
                                touchInProx = 1;
                                return 1;
                        }
                } else if (touchOut || !prox) { /* force touch out-prox */
                        wacom_report_abs(wcombo, ABS_MISC, TOUCH_DEVICE_ID);
                        wacom_report_key(wcombo, BTN_TOUCH, 0);
                        touchOut = 0;
                        touchInProx = 1;
                        return 1;
                }
        } else if (data[0] == 2) { /* Penabled */
                prox = data[1] & 0x20;

                touchInProx = 0;

                wacom->id[0] = ERASER_DEVICE_ID;

                /*
                 * 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 (prox) { /* in prox */
                        if (!wacom->tool[0]) {
                                /* Going into proximity select tool */
                                wacom->tool[1] = (data[1] & 0x08) ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
                                if (wacom->tool[1] == BTN_TOOL_PEN)
                                        wacom->id[0] = STYLUS_DEVICE_ID;
                        } else if (wacom->tool[1] == BTN_TOOL_RUBBER && !(data[1] & 0x08)) {
                                /*
                                 * was entered with stylus2 pressed
                                 * report out proximity for previous tool
                                */
                                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
                                wacom_report_key(wcombo, wacom->tool[1], 0);
                                wacom_input_sync(wcombo);

                                /* set new tool */
                                wacom->tool[1] = BTN_TOOL_PEN;
                                wacom->id[0] = STYLUS_DEVICE_ID;
                                return 0;
                        }
                        if (wacom->tool[1] != BTN_TOOL_RUBBER) {
                                /* Unknown tool selected default to pen tool */
                                wacom->tool[1] = BTN_TOOL_PEN;
                                wacom->id[0] = STYLUS_DEVICE_ID;
                        }
                        wacom_report_key(wcombo, BTN_STYLUS, data[1] & 0x02);
                        wacom_report_key(wcombo, BTN_STYLUS2, data[1] & 0x10);
                        wacom_report_abs(wcombo, ABS_X, wacom_le16_to_cpu(&data[2]));
                        wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
                        pressure = ((data[7] & 0x01) << 8) | data[6];
                        if (pressure < 0)
                                pressure = wacom->features->pressure_max + pressure + 1;
                        wacom_report_abs(wcombo, ABS_PRESSURE, pressure);
                        wacom_report_key(wcombo, BTN_TOUCH, pressure);
                } else {
                        wacom_report_abs(wcombo, ABS_PRESSURE, 0);
                        wacom_report_key(wcombo, BTN_STYLUS, 0);
                        wacom_report_key(wcombo, BTN_STYLUS2, 0);
                        wacom_report_key(wcombo, BTN_TOUCH, 0);
                }
                wacom_report_key(wcombo, wacom->tool[1], prox);
                wacom_report_abs(wcombo, ABS_MISC, wacom->id[0]);
                stylusInProx = prox;
                wacom->tool[0] = prox;
                return 1;
        }
        return 0;
}

int wacom_wac_irq(struct wacom_wac *wacom_wac, void *wcombo)
{
        switch (wacom_wac->features->type) {
                case PENPARTNER:
                        return wacom_penpartner_irq(wacom_wac, wcombo);

                case PL:
                        return wacom_pl_irq(wacom_wac, wcombo);

                case WACOM_G4:
                case GRAPHIRE:
                case WACOM_MO:
                        return wacom_graphire_irq(wacom_wac, wcombo);

                case PTU:
                        return wacom_ptu_irq(wacom_wac, wcombo);

                case INTUOS:
                case INTUOS3S:
                case INTUOS3:
                case INTUOS3L:
                case CINTIQ:
                case WACOM_BEE:
                        return wacom_intuos_irq(wacom_wac, wcombo);

                case TABLETPC:
                        return wacom_tpc_irq(wacom_wac, wcombo);

                default:
                        return 0;
        }
        return 0;
}

void wacom_init_input_dev(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
        switch (wacom_wac->features->type) {
                case WACOM_MO:
                        input_dev_mo(input_dev, wacom_wac);
                case WACOM_G4:
                        input_dev_g4(input_dev, wacom_wac);
                        /* fall through */
                case GRAPHIRE:
                        input_dev_g(input_dev, wacom_wac);
                        break;
                case WACOM_BEE:
                        input_dev_bee(input_dev, wacom_wac);
                case INTUOS3:
                case INTUOS3L:
                case CINTIQ:
                        input_dev_i3(input_dev, wacom_wac);
                        /* fall through */
                case INTUOS3S:
                        input_dev_i3s(input_dev, wacom_wac);
                        /* fall through */
                case INTUOS:
                        input_dev_i(input_dev, wacom_wac);
                        break;
                case PL:
                case PTU:
                case TABLETPC:
                        input_dev_pl(input_dev, wacom_wac);
                        /* fall through */
                case PENPARTNER:
                        input_dev_pt(input_dev, wacom_wac);
                        break;
        }
        return;
}

static struct wacom_features wacom_features[] = {
        { "Wacom Penpartner",    7,   5040,  3780,  255,  0, PENPARTNER },
        { "Wacom Graphire",      8,  10206,  7422,  511, 63, GRAPHIRE },
        { "Wacom Graphire2 4x5", 8,  10206,  7422,  511, 63, GRAPHIRE },
        { "Wacom Graphire2 5x7", 8,  13918, 10206,  511, 63, GRAPHIRE },
        { "Wacom Graphire3",     8,  10208,  7424,  511, 63, GRAPHIRE },
        { "Wacom Graphire3 6x8", 8,  16704, 12064,  511, 63, GRAPHIRE },
        { "Wacom Graphire4 4x5", 8,  10208,  7424,  511, 63, WACOM_G4 },
        { "Wacom Graphire4 6x8", 8,  16704, 12064,  511, 63, WACOM_G4 },
        { "Wacom BambooFun 4x5", 9,  14760,  9225,  511, 63, WACOM_MO },
        { "Wacom BambooFun 6x8", 9,  21648, 13530,  511, 63, WACOM_MO },
        { "Wacom Bamboo1 Medium",8,  16704, 12064,  511, 63, GRAPHIRE },
        { "Wacom Volito",        8,   5104,  3712,  511, 63, GRAPHIRE },
        { "Wacom PenStation2",   8,   3250,  2320,  255, 63, GRAPHIRE },
        { "Wacom Volito2 4x5",   8,   5104,  3712,  511, 63, GRAPHIRE },
        { "Wacom Volito2 2x3",   8,   3248,  2320,  511, 63, GRAPHIRE },
        { "Wacom PenPartner2",   8,   3250,  2320,  511, 63, GRAPHIRE },
        { "Wacom Bamboo",        9,  14760,  9225,  511, 63, WACOM_MO },
        { "Wacom Bamboo1",       8,   5104,  3712,  511, 63, GRAPHIRE },
        { "Wacom Intuos 4x5",   10,  12700, 10600, 1023, 31, INTUOS },
        { "Wacom Intuos 6x8",   10,  20320, 16240, 1023, 31, INTUOS },
        { "Wacom Intuos 9x12",  10,  30480, 24060, 1023, 31, INTUOS },
        { "Wacom Intuos 12x12", 10,  30480, 31680, 1023, 31, INTUOS },
        { "Wacom Intuos 12x18", 10,  45720, 31680, 1023, 31, INTUOS },
        { "Wacom PL400",         8,   5408,  4056,  255,  0, PL },
        { "Wacom PL500",         8,   6144,  4608,  255,  0, PL },
        { "Wacom PL600",         8,   6126,  4604,  255,  0, PL },
        { "Wacom PL600SX",       8,   6260,  5016,  255,  0, PL },
        { "Wacom PL550",         8,   6144,  4608,  511,  0, PL },
        { "Wacom PL800",         8,   7220,  5780,  511,  0, PL },
        { "Wacom PL700",         8,   6758,  5406,  511,  0, PL },
        { "Wacom PL510",         8,   6282,  4762,  511,  0, PL },
        { "Wacom DTU710",        8,  34080, 27660,  511,  0, PL },
        { "Wacom DTF521",        8,   6282,  4762,  511,  0, PL },
        { "Wacom DTF720",        8,   6858,  5506,  511,  0, PL },
        { "Wacom Cintiq Partner",8,  20480, 15360,  511,  0, PTU },
        { "Wacom Intuos2 4x5",   10, 12700, 10600, 1023, 31, INTUOS },
        { "Wacom Intuos2 6x8",   10, 20320, 16240, 1023, 31, INTUOS },
        { "Wacom Intuos2 9x12",  10, 30480, 24060, 1023, 31, INTUOS },
        { "Wacom Intuos2 12x12", 10, 30480, 31680, 1023, 31, INTUOS },
        { "Wacom Intuos2 12x18", 10, 45720, 31680, 1023, 31, INTUOS },
        { "Wacom Intuos3 4x5",   10, 25400, 20320, 1023, 63, INTUOS3S },
        { "Wacom Intuos3 6x8",   10, 40640, 30480, 1023, 63, INTUOS3 },
        { "Wacom Intuos3 9x12",  10, 60960, 45720, 1023, 63, INTUOS3 },
        { "Wacom Intuos3 12x12", 10, 60960, 60960, 1023, 63, INTUOS3L },
        { "Wacom Intuos3 12x19", 10, 97536, 60960, 1023, 63, INTUOS3L },
        { "Wacom Intuos3 6x11",  10, 54204, 31750, 1023, 63, INTUOS3 },
        { "Wacom Intuos3 4x6",   10, 31496, 19685, 1023, 63, INTUOS3S },
        { "Wacom Cintiq 21UX",   10, 87200, 65600, 1023, 63, CINTIQ },
        { "Wacom Cintiq 20WSX",  10, 86680, 54180, 1023, 63, WACOM_BEE },
        { "Wacom Cintiq 12WX",   10, 53020, 33440, 1023, 63, WACOM_BEE },
        { "Wacom DTU1931",        8, 37832, 30305,  511,  0, PL },
        { "Wacom ISDv4 90",       8, 26202, 16325,  255,  0, TABLETPC },
        { "Wacom ISDv4 93",       8, 26202, 16325,  255,  0, TABLETPC },
        { "Wacom ISDv4 9A",       8, 26202, 16325,  255,  0, TABLETPC },
        { "Wacom Intuos2 6x8",   10, 20320, 16240, 1023, 31, INTUOS },
        { }
};

static 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, 0x15) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x16) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x17) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x18) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x19) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x60) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x61) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x62) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x63) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x64) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x65) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x69) },
        { 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, 0x37) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x38) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x39) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC0) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC4) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x03) },
        { 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, 0xB0) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB1) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB2) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB3) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB4) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB5) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xB7) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x3F) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC5) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC6) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0xC7) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x90) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x93) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x9A) },
        { USB_DEVICE(USB_VENDOR_ID_WACOM, 0x47) },
        { }
};

const struct usb_device_id *get_device_table(void)
{
        const struct usb_device_id *id_table = wacom_ids;

        return id_table;
}

struct wacom_features * get_wacom_feature(const struct usb_device_id *id)
{
        int index = id - wacom_ids;
        struct wacom_features *wf = &wacom_features[index];

        return wf;
}

MODULE_DEVICE_TABLE(usb, wacom_ids);