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-rw-r--r--drivers/input/tsdev.c533
1 files changed, 0 insertions, 533 deletions
diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c
deleted file mode 100644
index d2f882e98e5e..000000000000
--- a/drivers/input/tsdev.c
+++ /dev/null
@@ -1,533 +0,0 @@
1/*
2 * $Id: tsdev.c,v 1.15 2002/04/10 16:50:19 jsimmons Exp $
3 *
4 * Copyright (c) 2001 "Crazy" james Simmons
5 *
6 * Compaq touchscreen protocol driver. The protocol emulated by this driver
7 * is obsolete; for new programs use the tslib library which can read directly
8 * from evdev and perform dejittering, variance filtering and calibration -
9 * all in user space, not at kernel level. The meaning of this driver is
10 * to allow usage of newer input drivers with old applications that use the
11 * old /dev/h3600_ts and /dev/h3600_tsraw devices.
12 *
13 * 09-Apr-2004: Andrew Zabolotny <zap@homelink.ru>
14 * Fixed to actually work, not just output random numbers.
15 * Added support for both h3600_ts and h3600_tsraw protocol
16 * emulation.
17 */
18
19/*
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 *
34 * Should you need to contact me, the author, you can do so either by
35 * e-mail - mail your message to <jsimmons@infradead.org>.
36 */
37
38#define TSDEV_MINOR_BASE 128
39#define TSDEV_MINORS 32
40/* First 16 devices are h3600_ts compatible; second 16 are h3600_tsraw */
41#define TSDEV_MINOR_MASK 15
42#define TSDEV_BUFFER_SIZE 64
43
44#include <linux/slab.h>
45#include <linux/poll.h>
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/init.h>
49#include <linux/input.h>
50#include <linux/major.h>
51#include <linux/random.h>
52#include <linux/time.h>
53#include <linux/device.h>
54
55#ifndef CONFIG_INPUT_TSDEV_SCREEN_X
56#define CONFIG_INPUT_TSDEV_SCREEN_X 240
57#endif
58#ifndef CONFIG_INPUT_TSDEV_SCREEN_Y
59#define CONFIG_INPUT_TSDEV_SCREEN_Y 320
60#endif
61
62/* This driver emulates both protocols of the old h3600_ts and h3600_tsraw
63 * devices. The first one must output X/Y data in 'cooked' format, e.g.
64 * filtered, dejittered and calibrated. Second device just outputs raw
65 * data received from the hardware.
66 *
67 * This driver doesn't support filtering and dejittering; it supports only
68 * calibration. Filtering and dejittering must be done in the low-level
69 * driver, if needed, because it may gain additional benefits from knowing
70 * the low-level details, the nature of noise and so on.
71 *
72 * The driver precomputes a calibration matrix given the initial xres and
73 * yres values (quite innacurate for most touchscreens) that will result
74 * in a more or less expected range of output values. The driver supports
75 * the TS_SET_CAL ioctl, which will replace the calibration matrix with a
76 * new one, supposedly generated from the values taken from the raw device.
77 */
78
79MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>");
80MODULE_DESCRIPTION("Input driver to touchscreen converter");
81MODULE_LICENSE("GPL");
82
83static int xres = CONFIG_INPUT_TSDEV_SCREEN_X;
84module_param(xres, uint, 0);
85MODULE_PARM_DESC(xres, "Horizontal screen resolution (can be negative for X-mirror)");
86
87static int yres = CONFIG_INPUT_TSDEV_SCREEN_Y;
88module_param(yres, uint, 0);
89MODULE_PARM_DESC(yres, "Vertical screen resolution (can be negative for Y-mirror)");
90
91/* From Compaq's Touch Screen Specification version 0.2 (draft) */
92struct ts_event {
93 short pressure;
94 short x;
95 short y;
96 short millisecs;
97};
98
99struct ts_calibration {
100 int xscale;
101 int xtrans;
102 int yscale;
103 int ytrans;
104 int xyswap;
105};
106
107struct tsdev {
108 int exist;
109 int open;
110 int minor;
111 char name[8];
112 struct input_handle handle;
113 wait_queue_head_t wait;
114 struct list_head client_list;
115 struct device dev;
116
117 int x, y, pressure;
118 struct ts_calibration cal;
119};
120
121struct tsdev_client {
122 struct fasync_struct *fasync;
123 struct list_head node;
124 struct tsdev *tsdev;
125 int head, tail;
126 struct ts_event event[TSDEV_BUFFER_SIZE];
127 int raw;
128};
129
130/* The following ioctl codes are defined ONLY for backward compatibility.
131 * Don't use tsdev for new developement; use the tslib library instead.
132 * Touchscreen calibration is a fully userspace task.
133 */
134/* Use 'f' as magic number */
135#define IOC_H3600_TS_MAGIC 'f'
136#define TS_GET_CAL _IOR(IOC_H3600_TS_MAGIC, 10, struct ts_calibration)
137#define TS_SET_CAL _IOW(IOC_H3600_TS_MAGIC, 11, struct ts_calibration)
138
139static struct tsdev *tsdev_table[TSDEV_MINORS/2];
140
141static int tsdev_fasync(int fd, struct file *file, int on)
142{
143 struct tsdev_client *client = file->private_data;
144 int retval;
145
146 retval = fasync_helper(fd, file, on, &client->fasync);
147 return retval < 0 ? retval : 0;
148}
149
150static int tsdev_open(struct inode *inode, struct file *file)
151{
152 int i = iminor(inode) - TSDEV_MINOR_BASE;
153 struct tsdev_client *client;
154 struct tsdev *tsdev;
155 int error;
156
157 printk(KERN_WARNING "tsdev (compaq touchscreen emulation) is scheduled "
158 "for removal.\nSee Documentation/feature-removal-schedule.txt "
159 "for details.\n");
160
161 if (i >= TSDEV_MINORS)
162 return -ENODEV;
163
164 tsdev = tsdev_table[i & TSDEV_MINOR_MASK];
165 if (!tsdev || !tsdev->exist)
166 return -ENODEV;
167
168 get_device(&tsdev->dev);
169
170 client = kzalloc(sizeof(struct tsdev_client), GFP_KERNEL);
171 if (!client) {
172 error = -ENOMEM;
173 goto err_put_tsdev;
174 }
175
176 client->tsdev = tsdev;
177 client->raw = (i >= TSDEV_MINORS / 2) ? 1 : 0;
178 list_add_tail(&client->node, &tsdev->client_list);
179
180 if (!tsdev->open++ && tsdev->exist) {
181 error = input_open_device(&tsdev->handle);
182 if (error)
183 goto err_free_client;
184 }
185
186 file->private_data = client;
187 return 0;
188
189 err_free_client:
190 list_del(&client->node);
191 kfree(client);
192 err_put_tsdev:
193 put_device(&tsdev->dev);
194 return error;
195}
196
197static void tsdev_free(struct device *dev)
198{
199 struct tsdev *tsdev = container_of(dev, struct tsdev, dev);
200
201 tsdev_table[tsdev->minor] = NULL;
202 kfree(tsdev);
203}
204
205static int tsdev_release(struct inode *inode, struct file *file)
206{
207 struct tsdev_client *client = file->private_data;
208 struct tsdev *tsdev = client->tsdev;
209
210 tsdev_fasync(-1, file, 0);
211
212 list_del(&client->node);
213 kfree(client);
214
215 if (!--tsdev->open && tsdev->exist)
216 input_close_device(&tsdev->handle);
217
218 put_device(&tsdev->dev);
219
220 return 0;
221}
222
223static ssize_t tsdev_read(struct file *file, char __user *buffer, size_t count,
224 loff_t *ppos)
225{
226 struct tsdev_client *client = file->private_data;
227 struct tsdev *tsdev = client->tsdev;
228 int retval = 0;
229
230 if (client->head == client->tail && tsdev->exist && (file->f_flags & O_NONBLOCK))
231 return -EAGAIN;
232
233 retval = wait_event_interruptible(tsdev->wait,
234 client->head != client->tail || !tsdev->exist);
235 if (retval)
236 return retval;
237
238 if (!tsdev->exist)
239 return -ENODEV;
240
241 while (client->head != client->tail &&
242 retval + sizeof (struct ts_event) <= count) {
243 if (copy_to_user (buffer + retval, client->event + client->tail,
244 sizeof (struct ts_event)))
245 return -EFAULT;
246 client->tail = (client->tail + 1) & (TSDEV_BUFFER_SIZE - 1);
247 retval += sizeof (struct ts_event);
248 }
249
250 return retval;
251}
252
253/* No kernel lock - fine */
254static unsigned int tsdev_poll(struct file *file, poll_table *wait)
255{
256 struct tsdev_client *client = file->private_data;
257 struct tsdev *tsdev = client->tsdev;
258
259 poll_wait(file, &tsdev->wait, wait);
260 return ((client->head == client->tail) ? 0 : (POLLIN | POLLRDNORM)) |
261 (tsdev->exist ? 0 : (POLLHUP | POLLERR));
262}
263
264static int tsdev_ioctl(struct inode *inode, struct file *file,
265 unsigned int cmd, unsigned long arg)
266{
267 struct tsdev_client *client = file->private_data;
268 struct tsdev *tsdev = client->tsdev;
269 int retval = 0;
270
271 switch (cmd) {
272 case TS_GET_CAL:
273 if (copy_to_user((void __user *)arg, &tsdev->cal,
274 sizeof (struct ts_calibration)))
275 retval = -EFAULT;
276 break;
277
278 case TS_SET_CAL:
279 if (copy_from_user(&tsdev->cal, (void __user *)arg,
280 sizeof (struct ts_calibration)))
281 retval = -EFAULT;
282 break;
283
284 default:
285 retval = -EINVAL;
286 break;
287 }
288
289 return retval;
290}
291
292static const struct file_operations tsdev_fops = {
293 .owner = THIS_MODULE,
294 .open = tsdev_open,
295 .release = tsdev_release,
296 .read = tsdev_read,
297 .poll = tsdev_poll,
298 .fasync = tsdev_fasync,
299 .ioctl = tsdev_ioctl,
300};
301
302static void tsdev_event(struct input_handle *handle, unsigned int type,
303 unsigned int code, int value)
304{
305 struct tsdev *tsdev = handle->private;
306 struct tsdev_client *client;
307 struct timeval time;
308
309 switch (type) {
310 case EV_ABS:
311 switch (code) {
312 case ABS_X:
313 tsdev->x = value;
314 break;
315
316 case ABS_Y:
317 tsdev->y = value;
318 break;
319
320 case ABS_PRESSURE:
321 if (value > handle->dev->absmax[ABS_PRESSURE])
322 value = handle->dev->absmax[ABS_PRESSURE];
323 value -= handle->dev->absmin[ABS_PRESSURE];
324 if (value < 0)
325 value = 0;
326 tsdev->pressure = value;
327 break;
328 }
329 break;
330
331 case EV_REL:
332 switch (code) {
333 case REL_X:
334 tsdev->x += value;
335 if (tsdev->x < 0)
336 tsdev->x = 0;
337 else if (tsdev->x > xres)
338 tsdev->x = xres;
339 break;
340
341 case REL_Y:
342 tsdev->y += value;
343 if (tsdev->y < 0)
344 tsdev->y = 0;
345 else if (tsdev->y > yres)
346 tsdev->y = yres;
347 break;
348 }
349 break;
350
351 case EV_KEY:
352 if (code == BTN_TOUCH || code == BTN_MOUSE) {
353 switch (value) {
354 case 0:
355 tsdev->pressure = 0;
356 break;
357
358 case 1:
359 if (!tsdev->pressure)
360 tsdev->pressure = 1;
361 break;
362 }
363 }
364 break;
365 }
366
367 if (type != EV_SYN || code != SYN_REPORT)
368 return;
369
370 list_for_each_entry(client, &tsdev->client_list, node) {
371 int x, y, tmp;
372
373 do_gettimeofday(&time);
374 client->event[client->head].millisecs = time.tv_usec / 1000;
375 client->event[client->head].pressure = tsdev->pressure;
376
377 x = tsdev->x;
378 y = tsdev->y;
379
380 /* Calibration */
381 if (!client->raw) {
382 x = ((x * tsdev->cal.xscale) >> 8) + tsdev->cal.xtrans;
383 y = ((y * tsdev->cal.yscale) >> 8) + tsdev->cal.ytrans;
384 if (tsdev->cal.xyswap) {
385 tmp = x; x = y; y = tmp;
386 }
387 }
388
389 client->event[client->head].x = x;
390 client->event[client->head].y = y;
391 client->head = (client->head + 1) & (TSDEV_BUFFER_SIZE - 1);
392 kill_fasync(&client->fasync, SIGIO, POLL_IN);
393 }
394 wake_up_interruptible(&tsdev->wait);
395}
396
397static int tsdev_connect(struct input_handler *handler, struct input_dev *dev,
398 const struct input_device_id *id)
399{
400 struct tsdev *tsdev;
401 int minor, delta;
402 int error;
403
404 for (minor = 0; minor < TSDEV_MINORS / 2 && tsdev_table[minor]; minor++);
405 if (minor >= TSDEV_MINORS / 2) {
406 printk(KERN_ERR
407 "tsdev: You have way too many touchscreens\n");
408 return -ENFILE;
409 }
410
411 tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL);
412 if (!tsdev)
413 return -ENOMEM;
414
415 INIT_LIST_HEAD(&tsdev->client_list);
416 init_waitqueue_head(&tsdev->wait);
417
418 tsdev->exist = 1;
419 tsdev->minor = minor;
420 tsdev->handle.dev = dev;
421 tsdev->handle.name = tsdev->name;
422 tsdev->handle.handler = handler;
423 tsdev->handle.private = tsdev;
424 snprintf(tsdev->name, sizeof(tsdev->name), "ts%d", minor);
425
426 /* Precompute the rough calibration matrix */
427 delta = dev->absmax [ABS_X] - dev->absmin [ABS_X] + 1;
428 if (delta == 0)
429 delta = 1;
430 tsdev->cal.xscale = (xres << 8) / delta;
431 tsdev->cal.xtrans = - ((dev->absmin [ABS_X] * tsdev->cal.xscale) >> 8);
432
433 delta = dev->absmax [ABS_Y] - dev->absmin [ABS_Y] + 1;
434 if (delta == 0)
435 delta = 1;
436 tsdev->cal.yscale = (yres << 8) / delta;
437 tsdev->cal.ytrans = - ((dev->absmin [ABS_Y] * tsdev->cal.yscale) >> 8);
438
439 snprintf(tsdev->dev.bus_id, sizeof(tsdev->dev.bus_id),
440 "ts%d", minor);
441 tsdev->dev.class = &input_class;
442 tsdev->dev.parent = &dev->dev;
443 tsdev->dev.devt = MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor);
444 tsdev->dev.release = tsdev_free;
445 device_initialize(&tsdev->dev);
446
447 tsdev_table[minor] = tsdev;
448
449 error = device_add(&tsdev->dev);
450 if (error)
451 goto err_free_tsdev;
452
453 error = input_register_handle(&tsdev->handle);
454 if (error)
455 goto err_delete_tsdev;
456
457 return 0;
458
459 err_delete_tsdev:
460 device_del(&tsdev->dev);
461 err_free_tsdev:
462 put_device(&tsdev->dev);
463 return error;
464}
465
466static void tsdev_disconnect(struct input_handle *handle)
467{
468 struct tsdev *tsdev = handle->private;
469 struct tsdev_client *client;
470
471 input_unregister_handle(handle);
472 device_del(&tsdev->dev);
473
474 tsdev->exist = 0;
475
476 if (tsdev->open) {
477 input_close_device(handle);
478 list_for_each_entry(client, &tsdev->client_list, node)
479 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
480 wake_up_interruptible(&tsdev->wait);
481 }
482
483 put_device(&tsdev->dev);
484}
485
486static const struct input_device_id tsdev_ids[] = {
487 {
488 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
489 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
490 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
491 .relbit = { BIT(REL_X) | BIT(REL_Y) },
492 }, /* A mouse like device, at least one button, two relative axes */
493
494 {
495 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
496 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
497 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
498 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
499 }, /* A tablet like device, at least touch detection, two absolute axes */
500
501 {
502 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
503 .evbit = { BIT(EV_ABS) },
504 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) },
505 }, /* A tablet like device with several gradations of pressure */
506
507 {} /* Terminating entry */
508};
509
510MODULE_DEVICE_TABLE(input, tsdev_ids);
511
512static struct input_handler tsdev_handler = {
513 .event = tsdev_event,
514 .connect = tsdev_connect,
515 .disconnect = tsdev_disconnect,
516 .fops = &tsdev_fops,
517 .minor = TSDEV_MINOR_BASE,
518 .name = "tsdev",
519 .id_table = tsdev_ids,
520};
521
522static int __init tsdev_init(void)
523{
524 return input_register_handler(&tsdev_handler);
525}
526
527static void __exit tsdev_exit(void)
528{
529 input_unregister_handler(&tsdev_handler);
530}
531
532module_init(tsdev_init);
533module_exit(tsdev_exit);
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