diff options
author | Richard Purdie <rpurdie@rpsys.net> | 2007-10-13 00:38:52 -0400 |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2007-10-13 00:38:52 -0400 |
commit | 70093178b6eda34e4a4fb18cc4a48a9eacc01d98 (patch) | |
tree | 5e35093d48ef2604ab5f8b4d2796691bcc1142c1 /drivers/input/tsdev.c | |
parent | 8f740ef391fc81cb887fa08d213cf67b843cb3b7 (diff) |
Input: remove tsdev interface
Remove the obsolete tsdev.c driver as scheduled.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/tsdev.c')
-rw-r--r-- | drivers/input/tsdev.c | 700 |
1 files changed, 0 insertions, 700 deletions
diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c deleted file mode 100644 index 120233493758..000000000000 --- a/drivers/input/tsdev.c +++ /dev/null | |||
@@ -1,700 +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7 | * is obsolete; for new programs use the tslib library which can read directly | ||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 | |||
79 | MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>"); | ||
80 | MODULE_DESCRIPTION("Input driver to touchscreen converter"); | ||
81 | MODULE_LICENSE("GPL"); | ||
82 | |||
83 | static int xres = CONFIG_INPUT_TSDEV_SCREEN_X; | ||
84 | module_param(xres, uint, 0); | ||
85 | MODULE_PARM_DESC(xres, "Horizontal screen resolution (can be negative for X-mirror)"); | ||
86 | |||
87 | static int yres = CONFIG_INPUT_TSDEV_SCREEN_Y; | ||
88 | module_param(yres, uint, 0); | ||
89 | MODULE_PARM_DESC(yres, "Vertical screen resolution (can be negative for Y-mirror)"); | ||
90 | |||
91 | /* From Compaq's Touch Screen Specification version 0.2 (draft) */ | ||
92 | struct ts_event { | ||
93 | short pressure; | ||
94 | short x; | ||
95 | short y; | ||
96 | short millisecs; | ||
97 | }; | ||
98 | |||
99 | struct ts_calibration { | ||
100 | int xscale; | ||
101 | int xtrans; | ||
102 | int yscale; | ||
103 | int ytrans; | ||
104 | int xyswap; | ||
105 | }; | ||
106 | |||
107 | struct 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 | spinlock_t client_lock; /* protects client_list */ | ||
116 | struct mutex mutex; | ||
117 | struct device dev; | ||
118 | |||
119 | int x, y, pressure; | ||
120 | struct ts_calibration cal; | ||
121 | }; | ||
122 | |||
123 | struct tsdev_client { | ||
124 | struct fasync_struct *fasync; | ||
125 | struct list_head node; | ||
126 | struct tsdev *tsdev; | ||
127 | struct ts_event buffer[TSDEV_BUFFER_SIZE]; | ||
128 | int head, tail; | ||
129 | spinlock_t buffer_lock; /* protects access to buffer, head and tail */ | ||
130 | int raw; | ||
131 | }; | ||
132 | |||
133 | /* The following ioctl codes are defined ONLY for backward compatibility. | ||
134 | * Don't use tsdev for new developement; use the tslib library instead. | ||
135 | * Touchscreen calibration is a fully userspace task. | ||
136 | */ | ||
137 | /* Use 'f' as magic number */ | ||
138 | #define IOC_H3600_TS_MAGIC 'f' | ||
139 | #define TS_GET_CAL _IOR(IOC_H3600_TS_MAGIC, 10, struct ts_calibration) | ||
140 | #define TS_SET_CAL _IOW(IOC_H3600_TS_MAGIC, 11, struct ts_calibration) | ||
141 | |||
142 | static struct tsdev *tsdev_table[TSDEV_MINORS/2]; | ||
143 | static DEFINE_MUTEX(tsdev_table_mutex); | ||
144 | |||
145 | static int tsdev_fasync(int fd, struct file *file, int on) | ||
146 | { | ||
147 | struct tsdev_client *client = file->private_data; | ||
148 | int retval; | ||
149 | |||
150 | retval = fasync_helper(fd, file, on, &client->fasync); | ||
151 | |||
152 | return retval < 0 ? retval : 0; | ||
153 | } | ||
154 | |||
155 | static void tsdev_free(struct device *dev) | ||
156 | { | ||
157 | struct tsdev *tsdev = container_of(dev, struct tsdev, dev); | ||
158 | |||
159 | kfree(tsdev); | ||
160 | } | ||
161 | |||
162 | static void tsdev_attach_client(struct tsdev *tsdev, struct tsdev_client *client) | ||
163 | { | ||
164 | spin_lock(&tsdev->client_lock); | ||
165 | list_add_tail_rcu(&client->node, &tsdev->client_list); | ||
166 | spin_unlock(&tsdev->client_lock); | ||
167 | synchronize_sched(); | ||
168 | } | ||
169 | |||
170 | static void tsdev_detach_client(struct tsdev *tsdev, struct tsdev_client *client) | ||
171 | { | ||
172 | spin_lock(&tsdev->client_lock); | ||
173 | list_del_rcu(&client->node); | ||
174 | spin_unlock(&tsdev->client_lock); | ||
175 | synchronize_sched(); | ||
176 | } | ||
177 | |||
178 | static int tsdev_open_device(struct tsdev *tsdev) | ||
179 | { | ||
180 | int retval; | ||
181 | |||
182 | retval = mutex_lock_interruptible(&tsdev->mutex); | ||
183 | if (retval) | ||
184 | return retval; | ||
185 | |||
186 | if (!tsdev->exist) | ||
187 | retval = -ENODEV; | ||
188 | else if (!tsdev->open++) { | ||
189 | retval = input_open_device(&tsdev->handle); | ||
190 | if (retval) | ||
191 | tsdev->open--; | ||
192 | } | ||
193 | |||
194 | mutex_unlock(&tsdev->mutex); | ||
195 | return retval; | ||
196 | } | ||
197 | |||
198 | static void tsdev_close_device(struct tsdev *tsdev) | ||
199 | { | ||
200 | mutex_lock(&tsdev->mutex); | ||
201 | |||
202 | if (tsdev->exist && !--tsdev->open) | ||
203 | input_close_device(&tsdev->handle); | ||
204 | |||
205 | mutex_unlock(&tsdev->mutex); | ||
206 | } | ||
207 | |||
208 | /* | ||
209 | * Wake up users waiting for IO so they can disconnect from | ||
210 | * dead device. | ||
211 | */ | ||
212 | static void tsdev_hangup(struct tsdev *tsdev) | ||
213 | { | ||
214 | struct tsdev_client *client; | ||
215 | |||
216 | spin_lock(&tsdev->client_lock); | ||
217 | list_for_each_entry(client, &tsdev->client_list, node) | ||
218 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | ||
219 | spin_unlock(&tsdev->client_lock); | ||
220 | |||
221 | wake_up_interruptible(&tsdev->wait); | ||
222 | } | ||
223 | |||
224 | static int tsdev_release(struct inode *inode, struct file *file) | ||
225 | { | ||
226 | struct tsdev_client *client = file->private_data; | ||
227 | struct tsdev *tsdev = client->tsdev; | ||
228 | |||
229 | tsdev_fasync(-1, file, 0); | ||
230 | tsdev_detach_client(tsdev, client); | ||
231 | kfree(client); | ||
232 | |||
233 | tsdev_close_device(tsdev); | ||
234 | put_device(&tsdev->dev); | ||
235 | |||
236 | return 0; | ||
237 | } | ||
238 | |||
239 | static int tsdev_open(struct inode *inode, struct file *file) | ||
240 | { | ||
241 | int i = iminor(inode) - TSDEV_MINOR_BASE; | ||
242 | struct tsdev_client *client; | ||
243 | struct tsdev *tsdev; | ||
244 | int error; | ||
245 | |||
246 | printk(KERN_WARNING "tsdev (compaq touchscreen emulation) is scheduled " | ||
247 | "for removal.\nSee Documentation/feature-removal-schedule.txt " | ||
248 | "for details.\n"); | ||
249 | |||
250 | if (i >= TSDEV_MINORS) | ||
251 | return -ENODEV; | ||
252 | |||
253 | error = mutex_lock_interruptible(&tsdev_table_mutex); | ||
254 | if (error) | ||
255 | return error; | ||
256 | tsdev = tsdev_table[i & TSDEV_MINOR_MASK]; | ||
257 | if (tsdev) | ||
258 | get_device(&tsdev->dev); | ||
259 | mutex_unlock(&tsdev_table_mutex); | ||
260 | |||
261 | if (!tsdev) | ||
262 | return -ENODEV; | ||
263 | |||
264 | client = kzalloc(sizeof(struct tsdev_client), GFP_KERNEL); | ||
265 | if (!client) { | ||
266 | error = -ENOMEM; | ||
267 | goto err_put_tsdev; | ||
268 | } | ||
269 | |||
270 | spin_lock_init(&client->buffer_lock); | ||
271 | client->tsdev = tsdev; | ||
272 | client->raw = i >= TSDEV_MINORS / 2; | ||
273 | tsdev_attach_client(tsdev, client); | ||
274 | |||
275 | error = tsdev_open_device(tsdev); | ||
276 | if (error) | ||
277 | goto err_free_client; | ||
278 | |||
279 | file->private_data = client; | ||
280 | return 0; | ||
281 | |||
282 | err_free_client: | ||
283 | tsdev_detach_client(tsdev, client); | ||
284 | kfree(client); | ||
285 | err_put_tsdev: | ||
286 | put_device(&tsdev->dev); | ||
287 | return error; | ||
288 | } | ||
289 | |||
290 | static int tsdev_fetch_next_event(struct tsdev_client *client, | ||
291 | struct ts_event *event) | ||
292 | { | ||
293 | int have_event; | ||
294 | |||
295 | spin_lock_irq(&client->buffer_lock); | ||
296 | |||
297 | have_event = client->head != client->tail; | ||
298 | if (have_event) { | ||
299 | *event = client->buffer[client->tail++]; | ||
300 | client->tail &= TSDEV_BUFFER_SIZE - 1; | ||
301 | } | ||
302 | |||
303 | spin_unlock_irq(&client->buffer_lock); | ||
304 | |||
305 | return have_event; | ||
306 | } | ||
307 | |||
308 | static ssize_t tsdev_read(struct file *file, char __user *buffer, size_t count, | ||
309 | loff_t *ppos) | ||
310 | { | ||
311 | struct tsdev_client *client = file->private_data; | ||
312 | struct tsdev *tsdev = client->tsdev; | ||
313 | struct ts_event event; | ||
314 | int retval; | ||
315 | |||
316 | if (client->head == client->tail && tsdev->exist && | ||
317 | (file->f_flags & O_NONBLOCK)) | ||
318 | return -EAGAIN; | ||
319 | |||
320 | retval = wait_event_interruptible(tsdev->wait, | ||
321 | client->head != client->tail || !tsdev->exist); | ||
322 | if (retval) | ||
323 | return retval; | ||
324 | |||
325 | if (!tsdev->exist) | ||
326 | return -ENODEV; | ||
327 | |||
328 | while (retval + sizeof(struct ts_event) <= count && | ||
329 | tsdev_fetch_next_event(client, &event)) { | ||
330 | |||
331 | if (copy_to_user(buffer + retval, &event, | ||
332 | sizeof(struct ts_event))) | ||
333 | return -EFAULT; | ||
334 | |||
335 | retval += sizeof(struct ts_event); | ||
336 | } | ||
337 | |||
338 | return retval; | ||
339 | } | ||
340 | |||
341 | /* No kernel lock - fine */ | ||
342 | static unsigned int tsdev_poll(struct file *file, poll_table *wait) | ||
343 | { | ||
344 | struct tsdev_client *client = file->private_data; | ||
345 | struct tsdev *tsdev = client->tsdev; | ||
346 | |||
347 | poll_wait(file, &tsdev->wait, wait); | ||
348 | return ((client->head == client->tail) ? 0 : (POLLIN | POLLRDNORM)) | | ||
349 | (tsdev->exist ? 0 : (POLLHUP | POLLERR)); | ||
350 | } | ||
351 | |||
352 | static long tsdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | ||
353 | { | ||
354 | struct tsdev_client *client = file->private_data; | ||
355 | struct tsdev *tsdev = client->tsdev; | ||
356 | int retval = 0; | ||
357 | |||
358 | retval = mutex_lock_interruptible(&tsdev->mutex); | ||
359 | if (retval) | ||
360 | return retval; | ||
361 | |||
362 | if (!tsdev->exist) { | ||
363 | retval = -ENODEV; | ||
364 | goto out; | ||
365 | } | ||
366 | |||
367 | switch (cmd) { | ||
368 | |||
369 | case TS_GET_CAL: | ||
370 | if (copy_to_user((void __user *)arg, &tsdev->cal, | ||
371 | sizeof (struct ts_calibration))) | ||
372 | retval = -EFAULT; | ||
373 | break; | ||
374 | |||
375 | case TS_SET_CAL: | ||
376 | if (copy_from_user(&tsdev->cal, (void __user *)arg, | ||
377 | sizeof(struct ts_calibration))) | ||
378 | retval = -EFAULT; | ||
379 | break; | ||
380 | |||
381 | default: | ||
382 | retval = -EINVAL; | ||
383 | break; | ||
384 | } | ||
385 | |||
386 | out: | ||
387 | mutex_unlock(&tsdev->mutex); | ||
388 | return retval; | ||
389 | } | ||
390 | |||
391 | static const struct file_operations tsdev_fops = { | ||
392 | .owner = THIS_MODULE, | ||
393 | .open = tsdev_open, | ||
394 | .release = tsdev_release, | ||
395 | .read = tsdev_read, | ||
396 | .poll = tsdev_poll, | ||
397 | .fasync = tsdev_fasync, | ||
398 | .unlocked_ioctl = tsdev_ioctl, | ||
399 | }; | ||
400 | |||
401 | static void tsdev_pass_event(struct tsdev *tsdev, struct tsdev_client *client, | ||
402 | int x, int y, int pressure, int millisecs) | ||
403 | { | ||
404 | struct ts_event *event; | ||
405 | int tmp; | ||
406 | |||
407 | /* Interrupts are already disabled, just acquire the lock */ | ||
408 | spin_lock(&client->buffer_lock); | ||
409 | |||
410 | event = &client->buffer[client->head++]; | ||
411 | client->head &= TSDEV_BUFFER_SIZE - 1; | ||
412 | |||
413 | /* Calibration */ | ||
414 | if (!client->raw) { | ||
415 | x = ((x * tsdev->cal.xscale) >> 8) + tsdev->cal.xtrans; | ||
416 | y = ((y * tsdev->cal.yscale) >> 8) + tsdev->cal.ytrans; | ||
417 | if (tsdev->cal.xyswap) { | ||
418 | tmp = x; x = y; y = tmp; | ||
419 | } | ||
420 | } | ||
421 | |||
422 | event->millisecs = millisecs; | ||
423 | event->x = x; | ||
424 | event->y = y; | ||
425 | event->pressure = pressure; | ||
426 | |||
427 | spin_unlock(&client->buffer_lock); | ||
428 | |||
429 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | ||
430 | } | ||
431 | |||
432 | static void tsdev_distribute_event(struct tsdev *tsdev) | ||
433 | { | ||
434 | struct tsdev_client *client; | ||
435 | struct timeval time; | ||
436 | int millisecs; | ||
437 | |||
438 | do_gettimeofday(&time); | ||
439 | millisecs = time.tv_usec / 1000; | ||
440 | |||
441 | list_for_each_entry_rcu(client, &tsdev->client_list, node) | ||
442 | tsdev_pass_event(tsdev, client, | ||
443 | tsdev->x, tsdev->y, | ||
444 | tsdev->pressure, millisecs); | ||
445 | } | ||
446 | |||
447 | static void tsdev_event(struct input_handle *handle, unsigned int type, | ||
448 | unsigned int code, int value) | ||
449 | { | ||
450 | struct tsdev *tsdev = handle->private; | ||
451 | struct input_dev *dev = handle->dev; | ||
452 | int wake_up_readers = 0; | ||
453 | |||
454 | switch (type) { | ||
455 | |||
456 | case EV_ABS: | ||
457 | switch (code) { | ||
458 | |||
459 | case ABS_X: | ||
460 | tsdev->x = value; | ||
461 | break; | ||
462 | |||
463 | case ABS_Y: | ||
464 | tsdev->y = value; | ||
465 | break; | ||
466 | |||
467 | case ABS_PRESSURE: | ||
468 | if (value > dev->absmax[ABS_PRESSURE]) | ||
469 | value = dev->absmax[ABS_PRESSURE]; | ||
470 | value -= dev->absmin[ABS_PRESSURE]; | ||
471 | if (value < 0) | ||
472 | value = 0; | ||
473 | tsdev->pressure = value; | ||
474 | break; | ||
475 | } | ||
476 | break; | ||
477 | |||
478 | case EV_REL: | ||
479 | switch (code) { | ||
480 | |||
481 | case REL_X: | ||
482 | tsdev->x += value; | ||
483 | if (tsdev->x < 0) | ||
484 | tsdev->x = 0; | ||
485 | else if (tsdev->x > xres) | ||
486 | tsdev->x = xres; | ||
487 | break; | ||
488 | |||
489 | case REL_Y: | ||
490 | tsdev->y += value; | ||
491 | if (tsdev->y < 0) | ||
492 | tsdev->y = 0; | ||
493 | else if (tsdev->y > yres) | ||
494 | tsdev->y = yres; | ||
495 | break; | ||
496 | } | ||
497 | break; | ||
498 | |||
499 | case EV_KEY: | ||
500 | if (code == BTN_TOUCH || code == BTN_MOUSE) { | ||
501 | switch (value) { | ||
502 | |||
503 | case 0: | ||
504 | tsdev->pressure = 0; | ||
505 | break; | ||
506 | |||
507 | case 1: | ||
508 | if (!tsdev->pressure) | ||
509 | tsdev->pressure = 1; | ||
510 | break; | ||
511 | } | ||
512 | } | ||
513 | break; | ||
514 | |||
515 | case EV_SYN: | ||
516 | if (code == SYN_REPORT) { | ||
517 | tsdev_distribute_event(tsdev); | ||
518 | wake_up_readers = 1; | ||
519 | } | ||
520 | break; | ||
521 | } | ||
522 | |||
523 | if (wake_up_readers) | ||
524 | wake_up_interruptible(&tsdev->wait); | ||
525 | } | ||
526 | |||
527 | static int tsdev_install_chrdev(struct tsdev *tsdev) | ||
528 | { | ||
529 | tsdev_table[tsdev->minor] = tsdev; | ||
530 | return 0; | ||
531 | } | ||
532 | |||
533 | static void tsdev_remove_chrdev(struct tsdev *tsdev) | ||
534 | { | ||
535 | mutex_lock(&tsdev_table_mutex); | ||
536 | tsdev_table[tsdev->minor] = NULL; | ||
537 | mutex_unlock(&tsdev_table_mutex); | ||
538 | } | ||
539 | |||
540 | /* | ||
541 | * Mark device non-existant. This disables writes, ioctls and | ||
542 | * prevents new users from opening the device. Already posted | ||
543 | * blocking reads will stay, however new ones will fail. | ||
544 | */ | ||
545 | static void tsdev_mark_dead(struct tsdev *tsdev) | ||
546 | { | ||
547 | mutex_lock(&tsdev->mutex); | ||
548 | tsdev->exist = 0; | ||
549 | mutex_unlock(&tsdev->mutex); | ||
550 | } | ||
551 | |||
552 | static void tsdev_cleanup(struct tsdev *tsdev) | ||
553 | { | ||
554 | struct input_handle *handle = &tsdev->handle; | ||
555 | |||
556 | tsdev_mark_dead(tsdev); | ||
557 | tsdev_hangup(tsdev); | ||
558 | tsdev_remove_chrdev(tsdev); | ||
559 | |||
560 | /* tsdev is marked dead so noone else accesses tsdev->open */ | ||
561 | if (tsdev->open) | ||
562 | input_close_device(handle); | ||
563 | } | ||
564 | |||
565 | static int tsdev_connect(struct input_handler *handler, struct input_dev *dev, | ||
566 | const struct input_device_id *id) | ||
567 | { | ||
568 | struct tsdev *tsdev; | ||
569 | int delta; | ||
570 | int minor; | ||
571 | int error; | ||
572 | |||
573 | for (minor = 0; minor < TSDEV_MINORS / 2; minor++) | ||
574 | if (!tsdev_table[minor]) | ||
575 | break; | ||
576 | |||
577 | if (minor == TSDEV_MINORS) { | ||
578 | printk(KERN_ERR "tsdev: no more free tsdev devices\n"); | ||
579 | return -ENFILE; | ||
580 | } | ||
581 | |||
582 | tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL); | ||
583 | if (!tsdev) | ||
584 | return -ENOMEM; | ||
585 | |||
586 | INIT_LIST_HEAD(&tsdev->client_list); | ||
587 | spin_lock_init(&tsdev->client_lock); | ||
588 | mutex_init(&tsdev->mutex); | ||
589 | init_waitqueue_head(&tsdev->wait); | ||
590 | |||
591 | snprintf(tsdev->name, sizeof(tsdev->name), "ts%d", minor); | ||
592 | tsdev->exist = 1; | ||
593 | tsdev->minor = minor; | ||
594 | |||
595 | tsdev->handle.dev = dev; | ||
596 | tsdev->handle.name = tsdev->name; | ||
597 | tsdev->handle.handler = handler; | ||
598 | tsdev->handle.private = tsdev; | ||
599 | |||
600 | /* Precompute the rough calibration matrix */ | ||
601 | delta = dev->absmax [ABS_X] - dev->absmin [ABS_X] + 1; | ||
602 | if (delta == 0) | ||
603 | delta = 1; | ||
604 | tsdev->cal.xscale = (xres << 8) / delta; | ||
605 | tsdev->cal.xtrans = - ((dev->absmin [ABS_X] * tsdev->cal.xscale) >> 8); | ||
606 | |||
607 | delta = dev->absmax [ABS_Y] - dev->absmin [ABS_Y] + 1; | ||
608 | if (delta == 0) | ||
609 | delta = 1; | ||
610 | tsdev->cal.yscale = (yres << 8) / delta; | ||
611 | tsdev->cal.ytrans = - ((dev->absmin [ABS_Y] * tsdev->cal.yscale) >> 8); | ||
612 | |||
613 | strlcpy(tsdev->dev.bus_id, tsdev->name, sizeof(tsdev->dev.bus_id)); | ||
614 | tsdev->dev.devt = MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor); | ||
615 | tsdev->dev.class = &input_class; | ||
616 | tsdev->dev.parent = &dev->dev; | ||
617 | tsdev->dev.release = tsdev_free; | ||
618 | device_initialize(&tsdev->dev); | ||
619 | |||
620 | error = input_register_handle(&tsdev->handle); | ||
621 | if (error) | ||
622 | goto err_free_tsdev; | ||
623 | |||
624 | error = tsdev_install_chrdev(tsdev); | ||
625 | if (error) | ||
626 | goto err_unregister_handle; | ||
627 | |||
628 | error = device_add(&tsdev->dev); | ||
629 | if (error) | ||
630 | goto err_cleanup_tsdev; | ||
631 | |||
632 | return 0; | ||
633 | |||
634 | err_cleanup_tsdev: | ||
635 | tsdev_cleanup(tsdev); | ||
636 | err_unregister_handle: | ||
637 | input_unregister_handle(&tsdev->handle); | ||
638 | err_free_tsdev: | ||
639 | put_device(&tsdev->dev); | ||
640 | return error; | ||
641 | } | ||
642 | |||
643 | static void tsdev_disconnect(struct input_handle *handle) | ||
644 | { | ||
645 | struct tsdev *tsdev = handle->private; | ||
646 | |||
647 | device_del(&tsdev->dev); | ||
648 | tsdev_cleanup(tsdev); | ||
649 | input_unregister_handle(handle); | ||
650 | put_device(&tsdev->dev); | ||
651 | } | ||
652 | |||
653 | static const struct input_device_id tsdev_ids[] = { | ||
654 | { | ||
655 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, | ||
656 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | ||
657 | .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, | ||
658 | .relbit = { BIT(REL_X) | BIT(REL_Y) }, | ||
659 | }, /* A mouse like device, at least one button, two relative axes */ | ||
660 | |||
661 | { | ||
662 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | ||
663 | .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, | ||
664 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | ||
665 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, | ||
666 | }, /* A tablet like device, at least touch detection, two absolute axes */ | ||
667 | |||
668 | { | ||
669 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | ||
670 | .evbit = { BIT(EV_ABS) }, | ||
671 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) }, | ||
672 | }, /* A tablet like device with several gradations of pressure */ | ||
673 | |||
674 | {} /* Terminating entry */ | ||
675 | }; | ||
676 | |||
677 | MODULE_DEVICE_TABLE(input, tsdev_ids); | ||
678 | |||
679 | static struct input_handler tsdev_handler = { | ||
680 | .event = tsdev_event, | ||
681 | .connect = tsdev_connect, | ||
682 | .disconnect = tsdev_disconnect, | ||
683 | .fops = &tsdev_fops, | ||
684 | .minor = TSDEV_MINOR_BASE, | ||
685 | .name = "tsdev", | ||
686 | .id_table = tsdev_ids, | ||
687 | }; | ||
688 | |||
689 | static int __init tsdev_init(void) | ||
690 | { | ||
691 | return input_register_handler(&tsdev_handler); | ||
692 | } | ||
693 | |||
694 | static void __exit tsdev_exit(void) | ||
695 | { | ||
696 | input_unregister_handler(&tsdev_handler); | ||
697 | } | ||
698 | |||
699 | module_init(tsdev_init); | ||
700 | module_exit(tsdev_exit); | ||