wacom_wac.c

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/*
 * 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, id, pressure;

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

	prox = data[1] & 0x40;

	id = 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;
			id = STYLUS_DEVICE_ID;
		}
		wacom_report_key(wcombo, wacom->tool[1], prox); /* report in proximity for tool */
		wacom_report_abs(wcombo, ABS_MISC, id); /* 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;
	int id;

	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);
		id = ERASER_DEVICE_ID;
	} else {
		wacom_report_key(wcombo, BTN_TOOL_PEN, data[1] & 0x20);
		wacom_report_key(wcombo, BTN_TOUCH, data[1] & 0x01);
		id = STYLUS_DEVICE_ID;
	}
	wacom_report_abs(wcombo, ABS_MISC, id); /* 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, id, rw;

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

	id = STYLUS_DEVICE_ID;
	if (data[1] & 0x80) { /* in prox */

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

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

			case 1: /* Rubber */
				wacom->tool[0] = BTN_TOOL_RUBBER;
				id = 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;
				id = 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, id); /* report tool id */
		wacom_report_key(wcombo, wacom->tool[0], 1);
	} else if (!(data[1] & 0x90)) {
		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_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] = 1;
			wacom->serial[1] = (data[7] & 0xf8);
			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, PAD_DEVICE_ID);
			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] & 0x80)) {
			wacom_input_sync(wcombo); /* sync last event */
			wacom->id[1] = 1;
			wacom->serial[1] = (data[7] & 0xf8);
			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, PAD_DEVICE_ID);
			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) {