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-rw-r--r--drivers/hid/hid-quanta.c261
1 files changed, 0 insertions, 261 deletions
diff --git a/drivers/hid/hid-quanta.c b/drivers/hid/hid-quanta.c
deleted file mode 100644
index 87a54df4d4ac..000000000000
--- a/drivers/hid/hid-quanta.c
+++ /dev/null
@@ -1,261 +0,0 @@
1/*
2 * HID driver for Quanta Optical Touch dual-touch panels
3 *
4 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
5 *
6 */
7
8/*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 */
14
15#include <linux/device.h>
16#include <linux/hid.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19
20MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
21MODULE_DESCRIPTION("Quanta dual-touch panel");
22MODULE_LICENSE("GPL");
23
24#include "hid-ids.h"
25
26struct quanta_data {
27 __u16 x, y;
28 __u8 id;
29 bool valid; /* valid finger data, or just placeholder? */
30 bool first; /* is this the first finger in this frame? */
31 bool activity_now; /* at least one active finger in this frame? */
32 bool activity; /* at least one active finger previously? */
33};
34
35static int quanta_input_mapping(struct hid_device *hdev, struct hid_input *hi,
36 struct hid_field *field, struct hid_usage *usage,
37 unsigned long **bit, int *max)
38{
39 switch (usage->hid & HID_USAGE_PAGE) {
40
41 case HID_UP_GENDESK:
42 switch (usage->hid) {
43 case HID_GD_X:
44 hid_map_usage(hi, usage, bit, max,
45 EV_ABS, ABS_MT_POSITION_X);
46 /* touchscreen emulation */
47 input_set_abs_params(hi->input, ABS_X,
48 field->logical_minimum,
49 field->logical_maximum, 0, 0);
50 return 1;
51 case HID_GD_Y:
52 hid_map_usage(hi, usage, bit, max,
53 EV_ABS, ABS_MT_POSITION_Y);
54 /* touchscreen emulation */
55 input_set_abs_params(hi->input, ABS_Y,
56 field->logical_minimum,
57 field->logical_maximum, 0, 0);
58 return 1;
59 }
60 return 0;
61
62 case HID_UP_DIGITIZER:
63 switch (usage->hid) {
64 case HID_DG_CONFIDENCE:
65 case HID_DG_TIPSWITCH:
66 case HID_DG_INPUTMODE:
67 case HID_DG_DEVICEINDEX:
68 case HID_DG_CONTACTCOUNT:
69 case HID_DG_CONTACTMAX:
70 case HID_DG_TIPPRESSURE:
71 case HID_DG_WIDTH:
72 case HID_DG_HEIGHT:
73 return -1;
74 case HID_DG_INRANGE:
75 /* touchscreen emulation */
76 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
77 return 1;
78 case HID_DG_CONTACTID:
79 hid_map_usage(hi, usage, bit, max,
80 EV_ABS, ABS_MT_TRACKING_ID);
81 return 1;
82 }
83 return 0;
84
85 case 0xff000000:
86 /* ignore vendor-specific features */
87 return -1;
88 }
89
90 return 0;
91}
92
93static int quanta_input_mapped(struct hid_device *hdev, struct hid_input *hi,
94 struct hid_field *field, struct hid_usage *usage,
95 unsigned long **bit, int *max)
96{
97 if (usage->type == EV_KEY || usage->type == EV_ABS)
98 clear_bit(usage->code, *bit);
99
100 return 0;
101}
102
103/*
104 * this function is called when a whole finger has been parsed,
105 * so that it can decide what to send to the input layer.
106 */
107static void quanta_filter_event(struct quanta_data *td, struct input_dev *input)
108{
109
110 td->first = !td->first; /* touchscreen emulation */
111
112 if (!td->valid) {
113 /*
114 * touchscreen emulation: if no finger in this frame is valid
115 * and there previously was finger activity, this is a release
116 */
117 if (!td->first && !td->activity_now && td->activity) {
118 input_event(input, EV_KEY, BTN_TOUCH, 0);
119 td->activity = false;
120 }
121 return;
122 }
123
124 input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
125 input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
126 input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
127
128 input_mt_sync(input);
129 td->valid = false;
130
131 /* touchscreen emulation: if first active finger in this frame... */
132 if (!td->activity_now) {
133 /* if there was no previous activity, emit touch event */
134 if (!td->activity) {
135 input_event(input, EV_KEY, BTN_TOUCH, 1);
136 td->activity = true;
137 }
138 td->activity_now = true;
139 /* and in any case this is our preferred finger */
140 input_event(input, EV_ABS, ABS_X, td->x);
141 input_event(input, EV_ABS, ABS_Y, td->y);
142 }
143}
144
145
146static int quanta_event(struct hid_device *hid, struct hid_field *field,
147 struct hid_usage *usage, __s32 value)
148{
149 struct quanta_data *td = hid_get_drvdata(hid);
150
151 if (hid->claimed & HID_CLAIMED_INPUT) {
152 struct input_dev *input = field->hidinput->input;
153
154 switch (usage->hid) {
155 case HID_DG_INRANGE:
156 td->valid = !!value;
157 break;
158 case HID_GD_X:
159 td->x = value;
160 break;
161 case HID_GD_Y:
162 td->y = value;
163 quanta_filter_event(td, input);
164 break;
165 case HID_DG_CONTACTID:
166 td->id = value;
167 break;
168 case HID_DG_CONTACTCOUNT:
169 /* touch emulation: this is the last field in a frame */
170 td->first = false;
171 td->activity_now = false;
172 break;
173 case HID_DG_CONFIDENCE:
174 case HID_DG_TIPSWITCH:
175 /* avoid interference from generic hidinput handling */
176 break;
177
178 default:
179 /* fallback to the generic hidinput handling */
180 return 0;
181 }
182 }
183
184 /* we have handled the hidinput part, now remains hiddev */
185 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
186 hid->hiddev_hid_event(hid, field, usage, value);
187
188 return 1;
189}
190
191static int quanta_probe(struct hid_device *hdev, const struct hid_device_id *id)
192{
193 int ret;
194 struct quanta_data *td;
195
196 td = kmalloc(sizeof(struct quanta_data), GFP_KERNEL);
197 if (!td) {
198 hid_err(hdev, "cannot allocate Quanta Touch data\n");
199 return -ENOMEM;
200 }
201 td->valid = false;
202 td->activity = false;
203 td->activity_now = false;
204 td->first = false;
205 hid_set_drvdata(hdev, td);
206
207 ret = hid_parse(hdev);
208 if (!ret)
209 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
210
211 if (ret)
212 kfree(td);
213
214 return ret;
215}
216
217static void quanta_remove(struct hid_device *hdev)
218{
219 hid_hw_stop(hdev);
220 kfree(hid_get_drvdata(hdev));
221 hid_set_drvdata(hdev, NULL);
222}
223
224static const struct hid_device_id quanta_devices[] = {
225 { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
226 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
227 { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
228 USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },
229 { }
230};
231MODULE_DEVICE_TABLE(hid, quanta_devices);
232
233static const struct hid_usage_id quanta_grabbed_usages[] = {
234 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
235 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
236};
237
238static struct hid_driver quanta_driver = {
239 .name = "quanta-touch",
240 .id_table = quanta_devices,
241 .probe = quanta_probe,
242 .remove = quanta_remove,
243 .input_mapping = quanta_input_mapping,
244 .input_mapped = quanta_input_mapped,
245 .usage_table = quanta_grabbed_usages,
246 .event = quanta_event,
247};
248
249static int __init quanta_init(void)
250{
251 return hid_register_driver(&quanta_driver);
252}
253
254static void __exit quanta_exit(void)
255{
256 hid_unregister_driver(&quanta_driver);
257}
258
259module_init(quanta_init);
260module_exit(quanta_exit);
261
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