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ca2dcd40 BN |
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); | |
d01799b2 PF |
199 | set_bit(BTN_0, input->keybit); |
200 | set_bit(BTN_1, input->keybit); | |
201 | set_bit(BTN_TOOL_FINGER, input->keybit); | |
ca2dcd40 BN |
202 | |
203 | /* Distance, rubber and mouse */ | |
204 | input->absbit[0] |= BIT(ABS_DISTANCE); | |
205 | set_bit(BTN_TOOL_RUBBER, input->keybit); | |
206 | set_bit(BTN_TOOL_MOUSE, input->keybit); | |
207 | ||
208 | input->absmax[ABS_PRESSURE] = 511; | |
209 | input->absmax[ABS_DISTANCE] = 32; | |
210 | ||
211 | input->absmax[ABS_X] = 16704; | |
212 | input->absmax[ABS_Y] = 12064; | |
213 | input->absfuzz[ABS_X] = 4; | |
214 | input->absfuzz[ABS_Y] = 4; | |
215 | ||
216 | return 0; | |
217 | err_free: | |
218 | kfree(wdata); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | static void wacom_remove(struct hid_device *hdev) | |
223 | { | |
224 | hid_hw_stop(hdev); | |
225 | kfree(hid_get_drvdata(hdev)); | |
226 | } | |
227 | ||
228 | static const struct hid_device_id wacom_devices[] = { | |
229 | { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) }, | |
230 | ||
231 | { } | |
232 | }; | |
233 | MODULE_DEVICE_TABLE(hid, wacom_devices); | |
234 | ||
235 | static struct hid_driver wacom_driver = { | |
236 | .name = "wacom", | |
237 | .id_table = wacom_devices, | |
238 | .probe = wacom_probe, | |
239 | .remove = wacom_remove, | |
240 | .raw_event = wacom_raw_event, | |
241 | }; | |
242 | ||
a24f423b | 243 | static int __init wacom_init(void) |
ca2dcd40 BN |
244 | { |
245 | int ret; | |
246 | ||
247 | ret = hid_register_driver(&wacom_driver); | |
248 | if (ret) | |
249 | printk(KERN_ERR "can't register wacom driver\n"); | |
250 | printk(KERN_ERR "wacom driver registered\n"); | |
251 | return ret; | |
252 | } | |
253 | ||
a24f423b | 254 | static void __exit wacom_exit(void) |
ca2dcd40 BN |
255 | { |
256 | hid_unregister_driver(&wacom_driver); | |
257 | } | |
258 | ||
259 | module_init(wacom_init); | |
260 | module_exit(wacom_exit); | |
261 | MODULE_LICENSE("GPL"); | |
262 |