blob: 12dcda529201b4795e268d1826cf3cf10b58ec01 [file] [log] [blame]
Bastien Noceraca2dcd42009-05-11 17:18:12 +02001/*
2 * Bluetooth Wacom Tablet support
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2007 Jiri Kosina
8 * Copyright (c) 2007 Paul Walmsley
9 * Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
10 * Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
11 * Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
12 */
13
14/*
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 2 of the License, or (at your option)
18 * any later version.
19 */
20
21#include <linux/device.h>
22#include <linux/hid.h>
23#include <linux/module.h>
24
25#include "hid-ids.h"
26
27struct wacom_data {
28 __u16 tool;
29 unsigned char butstate;
30};
31
32static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
33 u8 *raw_data, int size)
34{
35 struct wacom_data *wdata = hid_get_drvdata(hdev);
36 struct hid_input *hidinput;
37 struct input_dev *input;
38 unsigned char *data = (unsigned char *) raw_data;
39 int tool, x, y, rw;
40
41 if (!(hdev->claimed & HID_CLAIMED_INPUT))
42 return 0;
43
44 tool = 0;
45 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
46 input = hidinput->input;
47
48 /* Check if this is a tablet report */
49 if (data[0] != 0x03)
50 return 0;
51
52 /* Get X & Y positions */
53 x = le16_to_cpu(*(__le16 *) &data[2]);
54 y = le16_to_cpu(*(__le16 *) &data[4]);
55
56 /* Get current tool identifier */
57 if (data[1] & 0x90) { /* If pen is in the in/active area */
58 switch ((data[1] >> 5) & 3) {
59 case 0: /* Pen */
60 tool = BTN_TOOL_PEN;
61 break;
62
63 case 1: /* Rubber */
64 tool = BTN_TOOL_RUBBER;
65 break;
66
67 case 2: /* Mouse with wheel */
68 case 3: /* Mouse without wheel */
69 tool = BTN_TOOL_MOUSE;
70 break;
71 }
72
73 /* Reset tool if out of active tablet area */
74 if (!(data[1] & 0x10))
75 tool = 0;
76 }
77
78 /* If tool changed, notify input subsystem */
79 if (wdata->tool != tool) {
80 if (wdata->tool) {
81 /* Completely reset old tool state */
82 if (wdata->tool == BTN_TOOL_MOUSE) {
83 input_report_key(input, BTN_LEFT, 0);
84 input_report_key(input, BTN_RIGHT, 0);
85 input_report_key(input, BTN_MIDDLE, 0);
86 input_report_abs(input, ABS_DISTANCE,
87 input->absmax[ABS_DISTANCE]);
88 } else {
89 input_report_key(input, BTN_TOUCH, 0);
90 input_report_key(input, BTN_STYLUS, 0);
91 input_report_key(input, BTN_STYLUS2, 0);
92 input_report_abs(input, ABS_PRESSURE, 0);
93 }
94 input_report_key(input, wdata->tool, 0);
95 input_sync(input);
96 }
97 wdata->tool = tool;
98 if (tool)
99 input_report_key(input, tool, 1);
100 }
101
102 if (tool) {
103 input_report_abs(input, ABS_X, x);
104 input_report_abs(input, ABS_Y, y);
105
106 switch ((data[1] >> 5) & 3) {
107 case 2: /* Mouse with wheel */
108 input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
109 rw = (data[6] & 0x01) ? -1 :
110 (data[6] & 0x02) ? 1 : 0;
111 input_report_rel(input, REL_WHEEL, rw);
112 /* fall through */
113
114 case 3: /* Mouse without wheel */
115 input_report_key(input, BTN_LEFT, data[1] & 0x01);
116 input_report_key(input, BTN_RIGHT, data[1] & 0x02);
117 /* Compute distance between mouse and tablet */
118 rw = 44 - (data[6] >> 2);
119 if (rw < 0)
120 rw = 0;
121 else if (rw > 31)
122 rw = 31;
123 input_report_abs(input, ABS_DISTANCE, rw);
124 break;
125
126 default:
127 input_report_abs(input, ABS_PRESSURE,
128 data[6] | (((__u16) (data[1] & 0x08)) << 5));
129 input_report_key(input, BTN_TOUCH, data[1] & 0x01);
130 input_report_key(input, BTN_STYLUS, data[1] & 0x02);
131 input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
132 break;
133 }
134
135 input_sync(input);
136 }
137
138 /* Report the state of the two buttons at the top of the tablet
139 * as two extra fingerpad keys (buttons 4 & 5). */
140 rw = data[7] & 0x03;
141 if (rw != wdata->butstate) {
142 wdata->butstate = rw;
143 input_report_key(input, BTN_0, rw & 0x02);
144 input_report_key(input, BTN_1, rw & 0x01);
Przemo Firszt0e253fd2010-01-09 15:20:03 +0100145 input_report_key(input, BTN_TOOL_FINGER, 0xf0);
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200146 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
147 input_sync(input);
148 }
149
150 return 1;
151}
152
153static int wacom_probe(struct hid_device *hdev,
154 const struct hid_device_id *id)
155{
156 struct hid_input *hidinput;
157 struct input_dev *input;
158 struct wacom_data *wdata;
159 int ret;
160
161 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
162 if (wdata == NULL) {
163 dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
164 return -ENOMEM;
165 }
166
167 hid_set_drvdata(hdev, wdata);
168
169 ret = hid_parse(hdev);
170 if (ret) {
171 dev_err(&hdev->dev, "parse failed\n");
172 goto err_free;
173 }
174
175 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
176 if (ret) {
177 dev_err(&hdev->dev, "hw start failed\n");
178 goto err_free;
179 }
180
181 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
182 input = hidinput->input;
183
184 /* Basics */
185 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
186 input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
187 BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
188 input->relbit[0] |= BIT(REL_WHEEL);
189 set_bit(BTN_TOOL_PEN, input->keybit);
190 set_bit(BTN_TOUCH, input->keybit);
191 set_bit(BTN_STYLUS, input->keybit);
192 set_bit(BTN_STYLUS2, input->keybit);
193 set_bit(BTN_LEFT, input->keybit);
194 set_bit(BTN_RIGHT, input->keybit);
195 set_bit(BTN_MIDDLE, input->keybit);
196
197 /* Pad */
198 input->evbit[0] |= BIT(EV_MSC);
199 input->mscbit[0] |= BIT(MSC_SERIAL);
Przemo Firsztd01799b2010-01-04 12:32:00 +0100200 set_bit(BTN_0, input->keybit);
201 set_bit(BTN_1, input->keybit);
202 set_bit(BTN_TOOL_FINGER, input->keybit);
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200203
204 /* Distance, rubber and mouse */
205 input->absbit[0] |= BIT(ABS_DISTANCE);
206 set_bit(BTN_TOOL_RUBBER, input->keybit);
207 set_bit(BTN_TOOL_MOUSE, input->keybit);
208
209 input->absmax[ABS_PRESSURE] = 511;
210 input->absmax[ABS_DISTANCE] = 32;
211
212 input->absmax[ABS_X] = 16704;
213 input->absmax[ABS_Y] = 12064;
214 input->absfuzz[ABS_X] = 4;
215 input->absfuzz[ABS_Y] = 4;
216
217 return 0;
218err_free:
219 kfree(wdata);
220 return ret;
221}
222
223static void wacom_remove(struct hid_device *hdev)
224{
225 hid_hw_stop(hdev);
226 kfree(hid_get_drvdata(hdev));
227}
228
229static const struct hid_device_id wacom_devices[] = {
230 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
231
232 { }
233};
234MODULE_DEVICE_TABLE(hid, wacom_devices);
235
236static struct hid_driver wacom_driver = {
237 .name = "wacom",
238 .id_table = wacom_devices,
239 .probe = wacom_probe,
240 .remove = wacom_remove,
241 .raw_event = wacom_raw_event,
242};
243
Peter Huewea24f4232009-07-02 19:08:38 +0200244static int __init wacom_init(void)
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200245{
246 int ret;
247
248 ret = hid_register_driver(&wacom_driver);
249 if (ret)
250 printk(KERN_ERR "can't register wacom driver\n");
251 printk(KERN_ERR "wacom driver registered\n");
252 return ret;
253}
254
Peter Huewea24f4232009-07-02 19:08:38 +0200255static void __exit wacom_exit(void)
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200256{
257 hid_unregister_driver(&wacom_driver);
258}
259
260module_init(wacom_init);
261module_exit(wacom_exit);
262MODULE_LICENSE("GPL");
263