HID: Wacom Graphire Bluetooth driver
[linux-2.6.git] / drivers / hid / hid-wacom.c
1 /*
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
27 struct wacom_data {
28         __u16 tool;
29         unsigned char butstate;
30 };
31
32 static 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);
145                 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
146                 input_sync(input);
147         }
148
149         return 1;
150 }
151
152 static int wacom_probe(struct hid_device *hdev,
153                 const struct hid_device_id *id)
154 {
155         struct hid_input *hidinput;
156         struct input_dev *input;
157         struct wacom_data *wdata;
158         int ret;
159
160         wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
161         if (wdata == NULL) {
162                 dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
163                 return -ENOMEM;
164         }
165
166         hid_set_drvdata(hdev, wdata);
167
168         ret = hid_parse(hdev);
169         if (ret) {
170                 dev_err(&hdev->dev, "parse failed\n");
171                 goto err_free;
172         }
173
174         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
175         if (ret) {
176                 dev_err(&hdev->dev, "hw start failed\n");
177                 goto err_free;
178         }
179
180         hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
181         input = hidinput->input;
182
183         /* Basics */
184         input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
185         input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
186                 BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
187         input->relbit[0] |= BIT(REL_WHEEL);
188         set_bit(BTN_TOOL_PEN, input->keybit);
189         set_bit(BTN_TOUCH, input->keybit);
190         set_bit(BTN_STYLUS, input->keybit);
191         set_bit(BTN_STYLUS2, input->keybit);
192         set_bit(BTN_LEFT, input->keybit);
193         set_bit(BTN_RIGHT, input->keybit);
194         set_bit(BTN_MIDDLE, input->keybit);
195
196         /* Pad */
197         input->evbit[0] |= BIT(EV_MSC);
198         input->mscbit[0] |= BIT(MSC_SERIAL);
199
200         /* Distance, rubber and mouse */
201         input->absbit[0] |= BIT(ABS_DISTANCE);
202         set_bit(BTN_TOOL_RUBBER, input->keybit);
203         set_bit(BTN_TOOL_MOUSE, input->keybit);
204
205         input->absmax[ABS_PRESSURE] = 511;
206         input->absmax[ABS_DISTANCE] = 32;
207
208         input->absmax[ABS_X] = 16704;
209         input->absmax[ABS_Y] = 12064;
210         input->absfuzz[ABS_X] = 4;
211         input->absfuzz[ABS_Y] = 4;
212
213         return 0;
214 err_free:
215         kfree(wdata);
216         return ret;
217 }
218
219 static void wacom_remove(struct hid_device *hdev)
220 {
221         hid_hw_stop(hdev);
222         kfree(hid_get_drvdata(hdev));
223 }
224
225 static const struct hid_device_id wacom_devices[] = {
226         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
227
228         { }
229 };
230 MODULE_DEVICE_TABLE(hid, wacom_devices);
231
232 static struct hid_driver wacom_driver = {
233         .name = "wacom",
234         .id_table = wacom_devices,
235         .probe = wacom_probe,
236         .remove = wacom_remove,
237         .raw_event = wacom_raw_event,
238 };
239
240 static int wacom_init(void)
241 {
242         int ret;
243
244         ret = hid_register_driver(&wacom_driver);
245         if (ret)
246                 printk(KERN_ERR "can't register wacom driver\n");
247         printk(KERN_ERR "wacom driver registered\n");
248         return ret;
249 }
250
251 static void wacom_exit(void)
252 {
253         hid_unregister_driver(&wacom_driver);
254 }
255
256 module_init(wacom_init);
257 module_exit(wacom_exit);
258 MODULE_LICENSE("GPL");
259