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/*
* Bluetooth Wacom Tablet support
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2007 Paul Walmsley
* Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
* Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
* Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
*/
/*
* 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/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
struct wacom_data {
__u16 tool;
unsigned char butstate;
};
static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
u8 *raw_data, int size)
{
struct wacom_data *wdata = hid_get_drvdata(hdev);
struct hid_input *hidinput;
struct input_dev *input;
unsigned char *data = (unsigned char *) raw_data;
int tool, x, y, rw;
if (!(hdev->claimed & HID_CLAIMED_INPUT))
return 0;
tool = 0;
hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
input = hidinput->input;
/* Check if this is a tablet report */
if (data[0] != 0x03)
return 0;
/* Get X & Y positions */
x = le16_to_cpu(*(__le16 *) &data[2]);
y = le16_to_cpu(*(__le16 *) &data[4]);
/* Get current tool identifier */
if (data[1] & 0x90) { /* If pen is in the in/active area */
switch ((data[1] >> 5) & 3) {
case 0: /* Pen */
tool = BTN_TOOL_PEN;
break;
case 1: /* Rubber */
tool = BTN_TOOL_RUBBER;
break;
case 2: /* Mouse with wheel */
case 3: /* Mouse without wheel */
tool = BTN_TOOL_MOUSE;
break;
}
/* Reset tool if out of active tablet area */
if (!(data[1] & 0x10))
tool = 0;
}
/* If tool changed, notify input subsystem */
if (wdata->tool != tool) {
if (wdata->tool) {
/* Completely reset old tool state */
if (wdata->tool == BTN_TOOL_MOUSE) {
input_report_key(input, BTN_LEFT, 0);
input_report_key(input, BTN_RIGHT, 0);
input_report_key(input, BTN_MIDDLE, 0);
input_report_abs(input, ABS_DISTANCE,
input->absmax[ABS_DISTANCE]);
} else {
input_report_key(input, BTN_TOUCH, 0);
input_report_key(input, BTN_STYLUS, 0);
input_report_key(input, BTN_STYLUS2, 0);
input_report_abs(input, ABS_PRESSURE, 0);
}
input_report_key(input, wdata->tool, 0);
input_sync(input);
}
wdata->tool = tool;
if (tool)
input_report_key(input, tool, 1);
}
if (tool) {
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
switch ((data[1] >> 5) & 3) {
case 2: /* Mouse with wheel */
input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
rw = (data[6] & 0x01) ? -1 :
(data[6] & 0x02) ? 1 : 0;
input_report_rel(input, REL_WHEEL, rw);
/* fall through */
case 3: /* Mouse without wheel */
input_report_key(input, BTN_LEFT, data[1] & 0x01);
input_report_key(input, BTN_RIGHT, data[1] & 0x02);
/* Compute distance between mouse and tablet */
rw = 44 - (data[6] >> 2);
if (rw < 0)
rw = 0;
else if (rw > 31)
rw = 31;
input_report_abs(input, ABS_DISTANCE, rw);
break;
default:
input_report_abs(input, ABS_PRESSURE,
data[6] | (((__u16) (data[1] & 0x08)) << 5));
input_report_key(input, BTN_TOUCH, data[1] & 0x01);
input_report_key(input, BTN_STYLUS, data[1] & 0x02);
input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
break;
}
input_sync(input);
}
/* Report the state of the two buttons at the top of the tablet
* as two extra fingerpad keys (buttons 4 & 5). */
rw = data[7] & 0x03;
if (rw != wdata->butstate) {
wdata->butstate = rw;
input_report_key(input, BTN_0, rw & 0x02);
input_report_key(input, BTN_1, rw & 0x01);
input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
input_sync(input);
}
return 1;
}
static int wacom_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct hid_input *hidinput;
struct input_dev *input;
struct wacom_data *wdata;
int ret;
wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
if (wdata == NULL) {
dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
return -ENOMEM;
}
hid_set_drvdata(hdev, wdata);
ret = hid_parse(hdev);
if (ret) {
dev_err(&hdev->dev, "parse failed\n");
goto err_free;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
dev_err(&hdev->dev, "hw start failed\n");
goto err_free;
}
hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
input = hidinput->input;
/* Basics */
input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
input->relbit[0] |= BIT(REL_WHEEL);
set_bit(BTN_TOOL_PEN, input->keybit);
set_bit(BTN_TOUCH, input->keybit);
set_bit(BTN_STYLUS, input->keybit);
set_bit(BTN_STYLUS2, input->keybit);
set_bit(BTN_LEFT, input->keybit);
set_bit(BTN_RIGHT, input->keybit);
set_bit(BTN_MIDDLE, input->keybit);
/* Pad */
input->evbit[0] |= BIT(EV_MSC);
input->mscbit[0] |= BIT(MSC_SERIAL);
set_bit(BTN_0, input->keybit);
set_bit(BTN_1, input->keybit);
set_bit(BTN_TOOL_FINGER, input->keybit);
/* Distance, rubber and mouse */
input->absbit[0] |= BIT(ABS_DISTANCE);
set_bit(BTN_TOOL_RUBBER, input->keybit);
set_bit(BTN_TOOL_MOUSE, input->keybit);
input->absmax[ABS_PRESSURE] = 511;
input->absmax[ABS_DISTANCE] = 32;
input->absmax[ABS_X] = 16704;
input->absmax[ABS_Y] = 12064;
input->absfuzz[ABS_X] = 4;
input->absfuzz[ABS_Y] = 4;
return 0;
err_free:
kfree(wdata);
return ret;
}
static void wacom_remove(struct hid_device *hdev)
{
hid_hw_stop(hdev);
kfree(hid_get_drvdata(hdev));
}
static const struct hid_device_id wacom_devices[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
{ }
};
MODULE_DEVICE_TABLE(hid, wacom_devices);
static struct hid_driver wacom_driver = {
.name = "wacom",
.id_table = wacom_devices,
.probe = wacom_probe,
.remove = wacom_remove,
.raw_event = wacom_raw_event,
};
static int __init wacom_init(void)
{
int ret;
ret = hid_register_driver(&wacom_driver);
if (ret)
printk(KERN_ERR "can't register wacom driver\n");
printk(KERN_ERR "wacom driver registered\n");
return ret;
}
static void __exit wacom_exit(void)
{
hid_unregister_driver(&wacom_driver);
}
module_init(wacom_init);
module_exit(wacom_exit);
MODULE_LICENSE("GPL");
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