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authorBastien Nocera <hadess@hadess.net>2009-05-11 11:18:12 -0400
committerJiri Kosina <jkosina@suse.cz>2009-05-13 05:42:11 -0400
commitca2dcd40f54c8928b3994712a6cadd2078a087fa (patch)
tree5aaae34ff26e39d78b6d598d20b01eb606a7a462 /drivers/hid/hid-wacom.c
parent92e0d896ce3087112602449efd87c6d7f4eae8d0 (diff)
HID: Wacom Graphire Bluetooth driver
Based on the work by Andrew Zabolotny, an HID driver for the Bluetooth Wacom tablet. This is required as it uses a slightly different protocols from what's currently support by the drivers/input/wacom* driver, and those only support USB. A user-space patch is required to activate mode 2 of the Wacom tablet, as hidp does not support hid_output_raw_report. Signed-off-by: Bastien Nocera <hadess@hadess.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-wacom.c')
-rw-r--r--drivers/hid/hid-wacom.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
new file mode 100644
index 000000000000..1f9237f511e3
--- /dev/null
+++ b/drivers/hid/hid-wacom.c
@@ -0,0 +1,259 @@
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
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);
145 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
146 input_sync(input);
147 }
148
149 return 1;
150}
151
152static 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;
214err_free:
215 kfree(wdata);
216 return ret;
217}
218
219static void wacom_remove(struct hid_device *hdev)
220{
221 hid_hw_stop(hdev);
222 kfree(hid_get_drvdata(hdev));
223}
224
225static const struct hid_device_id wacom_devices[] = {
226 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
227
228 { }
229};
230MODULE_DEVICE_TABLE(hid, wacom_devices);
231
232static 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
240static 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
251static void wacom_exit(void)
252{
253 hid_unregister_driver(&wacom_driver);
254}
255
256module_init(wacom_init);
257module_exit(wacom_exit);
258MODULE_LICENSE("GPL");
259