path: root/drivers/input/tablet/wacom_wac.c

/*
 * 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