2 * Bluetooth Wacom Tablet support
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>
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)
21 #include <linux/device.h>
22 #include <linux/hid.h>
23 #include <linux/module.h>
29 unsigned char butstate;
32 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
33 u8 *raw_data, int size)
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;
41 if (!(hdev->claimed & HID_CLAIMED_INPUT))
45 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
46 input = hidinput->input;
48 /* Check if this is a tablet report */
52 /* Get X & Y positions */
53 x = le16_to_cpu(*(__le16 *) &data[2]);
54 y = le16_to_cpu(*(__le16 *) &data[4]);
56 /* Get current tool identifier */
57 if (data[1] & 0x90) { /* If pen is in the in/active area */
58 switch ((data[1] >> 5) & 3) {
64 tool = BTN_TOOL_RUBBER;
67 case 2: /* Mouse with wheel */
68 case 3: /* Mouse without wheel */
69 tool = BTN_TOOL_MOUSE;
73 /* Reset tool if out of active tablet area */
74 if (!(data[1] & 0x10))
78 /* If tool changed, notify input subsystem */
79 if (wdata->tool != 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]);
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);
94 input_report_key(input, wdata->tool, 0);
99 input_report_key(input, tool, 1);
103 input_report_abs(input, ABS_X, x);
104 input_report_abs(input, ABS_Y, y);
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);
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);
123 input_report_abs(input, ABS_DISTANCE, rw);
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);
138 /* Report the state of the two buttons at the top of the tablet
139 * as two extra fingerpad keys (buttons 4 & 5). */
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_report_key(input, BTN_TOOL_FINGER, 0xf0);
146 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
153 static int wacom_probe(struct hid_device *hdev,
154 const struct hid_device_id *id)
156 struct hid_input *hidinput;
157 struct input_dev *input;
158 struct wacom_data *wdata;
163 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
165 dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
169 hid_set_drvdata(hdev, wdata);
171 /* Parse the HID report now */
172 ret = hid_parse(hdev);
174 dev_err(&hdev->dev, "parse failed\n");
178 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
180 dev_err(&hdev->dev, "hw start failed\n");
185 * Note that if the raw queries fail, it's not a hard failure and it
186 * is safe to continue
189 /* Set Wacom mode2 */
190 rep_data[0] = 0x03; rep_data[1] = 0x00;
193 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
195 } while (ret < 0 && limit-- > 0);
197 dev_warn(&hdev->dev, "failed to poke device #1, %d\n", ret);
199 /* 0x06 - high reporting speed, 0x05 - low speed */
200 rep_data[0] = 0x06; rep_data[1] = 0x00;
203 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
205 } while (ret < 0 && limit-- > 0);
207 dev_warn(&hdev->dev, "failed to poke device #2, %d\n", ret);
209 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
210 input = hidinput->input;
213 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
214 input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
215 BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
216 input->relbit[0] |= BIT(REL_WHEEL);
217 set_bit(BTN_TOOL_PEN, input->keybit);
218 set_bit(BTN_TOUCH, input->keybit);
219 set_bit(BTN_STYLUS, input->keybit);
220 set_bit(BTN_STYLUS2, input->keybit);
221 set_bit(BTN_LEFT, input->keybit);
222 set_bit(BTN_RIGHT, input->keybit);
223 set_bit(BTN_MIDDLE, input->keybit);
226 input->evbit[0] |= BIT(EV_MSC);
227 input->mscbit[0] |= BIT(MSC_SERIAL);
228 set_bit(BTN_0, input->keybit);
229 set_bit(BTN_1, input->keybit);
230 set_bit(BTN_TOOL_FINGER, input->keybit);
232 /* Distance, rubber and mouse */
233 input->absbit[0] |= BIT(ABS_DISTANCE);
234 set_bit(BTN_TOOL_RUBBER, input->keybit);
235 set_bit(BTN_TOOL_MOUSE, input->keybit);
237 input->absmax[ABS_PRESSURE] = 511;
238 input->absmax[ABS_DISTANCE] = 32;
240 input->absmax[ABS_X] = 16704;
241 input->absmax[ABS_Y] = 12064;
242 input->absfuzz[ABS_X] = 4;
243 input->absfuzz[ABS_Y] = 4;
251 static void wacom_remove(struct hid_device *hdev)
254 kfree(hid_get_drvdata(hdev));
257 static const struct hid_device_id wacom_devices[] = {
258 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
262 MODULE_DEVICE_TABLE(hid, wacom_devices);
264 static struct hid_driver wacom_driver = {
266 .id_table = wacom_devices,
267 .probe = wacom_probe,
268 .remove = wacom_remove,
269 .raw_event = wacom_raw_event,
272 static int __init wacom_init(void)
276 ret = hid_register_driver(&wacom_driver);
278 printk(KERN_ERR "can't register wacom driver\n");
279 printk(KERN_ERR "wacom driver registered\n");
283 static void __exit wacom_exit(void)
285 hid_unregister_driver(&wacom_driver);
288 module_init(wacom_init);
289 module_exit(wacom_exit);
290 MODULE_LICENSE("GPL");