1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
|
/******************************************************************************
* touchkitusb.c -- Driver for eGalax TouchKit USB Touchscreens
*
* Copyright (C) 2004 by Daniel Ritz
* Copyright (C) by Todd E. Johnson (mtouchusb.c)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Based upon mtouchusb.c
*
*****************************************************************************/
//#define DEBUG
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#if !defined(DEBUG) && defined(CONFIG_USB_DEBUG)
#define DEBUG
#endif
#include <linux/usb.h>
#include <linux/usb_input.h>
#define TOUCHKIT_MIN_XC 0x0
#define TOUCHKIT_MAX_XC 0x07ff
#define TOUCHKIT_XC_FUZZ 0x0
#define TOUCHKIT_XC_FLAT 0x0
#define TOUCHKIT_MIN_YC 0x0
#define TOUCHKIT_MAX_YC 0x07ff
#define TOUCHKIT_YC_FUZZ 0x0
#define TOUCHKIT_YC_FLAT 0x0
#define TOUCHKIT_REPORT_DATA_SIZE 8
#define TOUCHKIT_DOWN 0x01
#define TOUCHKIT_POINT_TOUCH 0x81
#define TOUCHKIT_POINT_NOTOUCH 0x80
#define TOUCHKIT_GET_TOUCHED(dat) ((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
#define TOUCHKIT_GET_X(dat) (((dat)[3] << 7) | (dat)[4])
#define TOUCHKIT_GET_Y(dat) (((dat)[1] << 7) | (dat)[2])
#define DRIVER_VERSION "v0.1"
#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
#define DRIVER_DESC "eGalax TouchKit USB HID Touchscreen Driver"
static int swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
struct touchkit_usb {
unsigned char *data;
dma_addr_t data_dma;
struct urb *irq;
struct usb_device *udev;
struct input_dev input;
char name[128];
char phys[64];
};
static struct usb_device_id touchkit_devices[] = {
{USB_DEVICE(0x3823, 0x0001)},
{USB_DEVICE(0x0eef, 0x0001)},
{}
};
static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
{
struct touchkit_usb *touchkit = urb->context;
int retval;
int x, y;
switch (urb->status) {
case 0:
/* success */
break;
case -ETIMEDOUT:
/* this urb is timing out */
dbg("%s - urb timed out - was the device unplugged?",
__FUNCTION__);
return;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, urb->status);
return;
default:
dbg("%s - nonzero urb status received: %d",
__FUNCTION__, urb->status);
goto exit;
}
if (swap_xy) {
y = TOUCHKIT_GET_X(touchkit->data);
x = TOUCHKIT_GET_Y(touchkit->data);
} else {
x = TOUCHKIT_GET_X(touchkit->data);
y = TOUCHKIT_GET_Y(touchkit->data);
}
input_regs(&touchkit->input, regs);
input_report_key(&touchkit->input, BTN_TOUCH,
TOUCHKIT_GET_TOUCHED(touchkit->data));
input_report_abs(&touchkit->input, ABS_X, x);
input_report_abs(&touchkit->input, ABS_Y, y);
input_sync(&touchkit->input);
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
err("%s - usb_submit_urb failed with result: %d",
__FUNCTION__, retval);
}
static int touchkit_open(struct input_dev *input)
{
struct touchkit_usb *touchkit = input->private;
touchkit->irq->dev = touchkit->udev;
if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
return -EIO;
return 0;
}
static void touchkit_close(struct input_dev *input)
{
struct touchkit_usb *touchkit = input->private;
usb_kill_urb(touchkit->irq);
}
static int touchkit_alloc_buffers(struct usb_device *udev,
struct touchkit_usb *touchkit)
{
touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
SLAB_ATOMIC, &touchkit->data_dma);
if (!touchkit->data)
return -1;
return 0;
}
static void touchkit_free_buffers(struct usb_device *udev,
struct touchkit_usb *touchkit)
{
if (touchkit->data)
usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
touchkit->data, touchkit->data_dma);
}
static int touchkit_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int ret;
struct touchkit_usb *touchkit;
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev = interface_to_usbdev(intf);
char path[64];
interface = intf->cur_altsetting;
endpoint = &interface->endpoint[0].desc;
touchkit = kmalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
if (!touchkit)
return -ENOMEM;
memset(touchkit, 0, sizeof(struct touchkit_usb));
touchkit->udev = udev;
if (touchkit_alloc_buffers(udev, touchkit)) {
ret = -ENOMEM;
goto out_free;
}
touchkit->input.private = touchkit;
touchkit->input.open = touchkit_open;
touchkit->input.close = touchkit_close;
usb_make_path(udev, path, 64);
sprintf(touchkit->phys, "%s/input0", path);
touchkit->input.name = touchkit->name;
touchkit->input.phys = touchkit->phys;
usb_to_input_id(udev, &touchkit->input.id);
touchkit->input.dev = &intf->dev;
touchkit->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
touchkit->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
touchkit->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
/* Used to Scale Compensated Data */
touchkit->input.absmin[ABS_X] = TOUCHKIT_MIN_XC;
touchkit->input.absmax[ABS_X] = TOUCHKIT_MAX_XC;
touchkit->input.absfuzz[ABS_X] = TOUCHKIT_XC_FUZZ;
touchkit->input.absflat[ABS_X] = TOUCHKIT_XC_FLAT;
touchkit->input.absmin[ABS_Y] = TOUCHKIT_MIN_YC;
touchkit->input.absmax[ABS_Y] = TOUCHKIT_MAX_YC;
touchkit->input.absfuzz[ABS_Y] = TOUCHKIT_YC_FUZZ;
touchkit->input.absflat[ABS_Y] = TOUCHKIT_YC_FLAT;
if (udev->manufacturer)
strcat(touchkit->name, udev->manufacturer);
if (udev->product)
sprintf(touchkit->name, "%s %s", touchkit->name, udev->product);
if (!strlen(touchkit->name))
sprintf(touchkit->name, "USB Touchscreen %04x:%04x",
touchkit->input.id.vendor, touchkit->input.id.product);
touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!touchkit->irq) {
dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
ret = -ENOMEM;
goto out_free_buffers;
}
usb_fill_int_urb(touchkit->irq, touchkit->udev,
usb_rcvintpipe(touchkit->udev, 0x81),
touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
touchkit_irq, touchkit, endpoint->bInterval);
input_register_device(&touchkit->input);
printk(KERN_INFO "input: %s on %s\n", touchkit->name, path);
usb_set_intfdata(intf, touchkit);
return 0;
out_free_buffers:
touchkit_free_buffers(udev, touchkit);
out_free:
kfree(touchkit);
return ret;
}
static void touchkit_disconnect(struct usb_interface *intf)
{
struct touchkit_usb *touchkit = usb_get_intfdata(intf);
dbg("%s - called", __FUNCTION__);
if (!touchkit)
return;
dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
usb_set_intfdata(intf, NULL);
input_unregister_device(&touchkit->input);
usb_kill_urb(touchkit->irq);
usb_free_urb(touchkit->irq);
touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
kfree(touchkit);
}
MODULE_DEVICE_TABLE(usb, touchkit_devices);
static struct usb_driver touchkit_driver = {
.owner = THIS_MODULE,
.name = "touchkitusb",
.probe = touchkit_probe,
.disconnect = touchkit_disconnect,
.id_table = touchkit_devices,
};
static int __init touchkit_init(void)
{
return usb_register(&touchkit_driver);
}
static void __exit touchkit_cleanup(void)
{
usb_deregister(&touchkit_driver);
}
module_init(touchkit_init);
module_exit(touchkit_cleanup);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
|
