Commit | Line | Data |
---|---|---|
1d3e2023 DR |
1 | /****************************************************************************** |
2 | * usbtouchscreen.c | |
3 | * Driver for USB Touchscreens, supporting those devices: | |
4 | * - eGalax Touchkit | |
5 | * - 3M/Microtouch | |
6 | * - ITM | |
7 | * - PanJit TouchSet | |
8 | * | |
9 | * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch> | |
10 | * Copyright (C) by Todd E. Johnson (mtouchusb.c) | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * Driver is based on touchkitusb.c | |
27 | * - ITM parts are from itmtouch.c | |
28 | * - 3M parts are from mtouchusb.c | |
29 | * - PanJit parts are from an unmerged driver by Lanslott Gish | |
30 | * | |
31 | *****************************************************************************/ | |
32 | ||
33 | //#define DEBUG | |
34 | ||
35 | #include <linux/config.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/input.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/usb.h> | |
42 | #include <linux/usb_input.h> | |
43 | ||
44 | ||
45 | #define DRIVER_VERSION "v0.3" | |
46 | #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" | |
47 | #define DRIVER_DESC "USB Touchscreen Driver" | |
48 | ||
49 | static int swap_xy; | |
50 | module_param(swap_xy, bool, 0644); | |
51 | MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); | |
52 | ||
53 | /* device specifc data/functions */ | |
54 | struct usbtouch_usb; | |
55 | struct usbtouch_device_info { | |
56 | int min_xc, max_xc; | |
57 | int min_yc, max_yc; | |
58 | int min_press, max_press; | |
59 | int rept_size; | |
60 | int flags; | |
61 | ||
62 | void (*process_pkt) (struct usbtouch_usb *usbtouch, struct pt_regs *regs, unsigned char *pkt, int len); | |
63 | int (*read_data) (unsigned char *pkt, int *x, int *y, int *touch, int *press); | |
64 | int (*init) (struct usbtouch_usb *usbtouch); | |
65 | }; | |
66 | ||
67 | #define USBTOUCH_FLG_BUFFER 0x01 | |
68 | ||
69 | ||
70 | /* a usbtouch device */ | |
71 | struct usbtouch_usb { | |
72 | unsigned char *data; | |
73 | dma_addr_t data_dma; | |
74 | unsigned char *buffer; | |
75 | int buf_len; | |
76 | struct urb *irq; | |
77 | struct usb_device *udev; | |
78 | struct input_dev *input; | |
79 | struct usbtouch_device_info *type; | |
80 | char name[128]; | |
81 | char phys[64]; | |
82 | }; | |
83 | ||
84 | static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, | |
85 | struct pt_regs *regs, unsigned char *pkt, int len); | |
86 | ||
87 | /* device types */ | |
88 | enum { | |
89 | DEVTPYE_DUMMY = -1, | |
90 | DEVTYPE_EGALAX, | |
91 | DEVTYPE_PANJIT, | |
92 | DEVTYPE_3M, | |
93 | DEVTYPE_ITM, | |
94 | }; | |
95 | ||
96 | static struct usb_device_id usbtouch_devices[] = { | |
97 | #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX | |
98 | {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, | |
99 | {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, | |
100 | {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, | |
101 | {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, | |
102 | #endif | |
103 | ||
104 | #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT | |
105 | {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, | |
106 | {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, | |
107 | {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, | |
108 | {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, | |
109 | #endif | |
110 | ||
111 | #ifdef CONFIG_USB_TOUCHSCREEN_3M | |
112 | {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, | |
113 | #endif | |
114 | ||
115 | #ifdef CONFIG_USB_TOUCHSCREEN_ITM | |
116 | {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, | |
117 | #endif | |
118 | ||
119 | {} | |
120 | }; | |
121 | ||
122 | ||
123 | /***************************************************************************** | |
124 | * eGalax part | |
125 | */ | |
126 | ||
127 | #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX | |
128 | ||
129 | #define EGALAX_PKT_TYPE_MASK 0xFE | |
130 | #define EGALAX_PKT_TYPE_REPT 0x80 | |
131 | #define EGALAX_PKT_TYPE_DIAG 0x0A | |
132 | ||
133 | static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press) | |
134 | { | |
135 | if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) | |
136 | return 0; | |
137 | ||
138 | *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); | |
139 | *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); | |
140 | *touch = pkt[0] & 0x01; | |
141 | ||
142 | return 1; | |
143 | ||
144 | } | |
145 | ||
146 | static int egalax_get_pkt_len(unsigned char *buf) | |
147 | { | |
148 | switch (buf[0] & EGALAX_PKT_TYPE_MASK) { | |
149 | case EGALAX_PKT_TYPE_REPT: | |
150 | return 5; | |
151 | ||
152 | case EGALAX_PKT_TYPE_DIAG: | |
153 | return buf[1] + 2; | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static void egalax_process(struct usbtouch_usb *usbtouch, struct pt_regs *regs, | |
160 | unsigned char *pkt, int len) | |
161 | { | |
162 | unsigned char *buffer; | |
163 | int pkt_len, buf_len, pos; | |
164 | ||
165 | /* if the buffer contains data, append */ | |
166 | if (unlikely(usbtouch->buf_len)) { | |
167 | int tmp; | |
168 | ||
169 | /* if only 1 byte in buffer, add another one to get length */ | |
170 | if (usbtouch->buf_len == 1) | |
171 | usbtouch->buffer[1] = pkt[0]; | |
172 | ||
173 | pkt_len = egalax_get_pkt_len(usbtouch->buffer); | |
174 | ||
175 | /* unknown packet: drop everything */ | |
176 | if (!pkt_len) | |
177 | return; | |
178 | ||
179 | /* append, process */ | |
180 | tmp = pkt_len - usbtouch->buf_len; | |
181 | memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); | |
182 | usbtouch_process_pkt(usbtouch, regs, usbtouch->buffer, pkt_len); | |
183 | ||
184 | buffer = pkt + tmp; | |
185 | buf_len = len - tmp; | |
186 | } else { | |
187 | buffer = pkt; | |
188 | buf_len = len; | |
189 | } | |
190 | ||
191 | /* only one byte left in buffer */ | |
192 | if (unlikely(buf_len == 1)) { | |
193 | usbtouch->buffer[0] = buffer[0]; | |
194 | usbtouch->buf_len = 1; | |
195 | return; | |
196 | } | |
197 | ||
198 | /* loop over the buffer */ | |
199 | pos = 0; | |
200 | while (pos < buf_len) { | |
201 | /* get packet len */ | |
202 | pkt_len = egalax_get_pkt_len(buffer + pos); | |
203 | ||
204 | /* unknown packet: drop everything */ | |
205 | if (unlikely(!pkt_len)) | |
206 | return; | |
207 | ||
208 | /* full packet: process */ | |
209 | if (likely(pkt_len <= buf_len)) { | |
210 | usbtouch_process_pkt(usbtouch, regs, buffer + pos, pkt_len); | |
211 | } else { | |
212 | /* incomplete packet: save in buffer */ | |
213 | memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); | |
214 | usbtouch->buf_len = buf_len - pos; | |
215 | } | |
216 | pos += pkt_len; | |
217 | } | |
218 | } | |
219 | #endif | |
220 | ||
221 | ||
222 | /***************************************************************************** | |
223 | * PanJit Part | |
224 | */ | |
225 | #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT | |
226 | static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press) | |
227 | { | |
228 | *x = ((pkt[2] & 0x0F) << 8) | pkt[1]; | |
229 | *y = ((pkt[4] & 0x0F) << 8) | pkt[3]; | |
230 | *touch = pkt[0] & 0x01; | |
231 | ||
232 | return 1; | |
233 | } | |
234 | #endif | |
235 | ||
236 | ||
237 | /***************************************************************************** | |
238 | * 3M/Microtouch Part | |
239 | */ | |
240 | #ifdef CONFIG_USB_TOUCHSCREEN_3M | |
241 | ||
242 | #define MTOUCHUSB_ASYNC_REPORT 1 | |
243 | #define MTOUCHUSB_RESET 7 | |
244 | #define MTOUCHUSB_REQ_CTRLLR_ID 10 | |
245 | ||
246 | static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press) | |
247 | { | |
248 | *x = (pkt[8] << 8) | pkt[7]; | |
249 | *y = (pkt[10] << 8) | pkt[9]; | |
250 | *touch = (pkt[2] & 0x40) ? 1 : 0; | |
251 | ||
252 | return 1; | |
253 | } | |
254 | ||
255 | static int mtouch_init(struct usbtouch_usb *usbtouch) | |
256 | { | |
257 | int ret; | |
258 | ||
259 | ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), | |
260 | MTOUCHUSB_RESET, | |
261 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
262 | 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); | |
263 | dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", | |
264 | __FUNCTION__, ret); | |
265 | if (ret < 0) | |
266 | return ret; | |
267 | ||
268 | ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), | |
269 | MTOUCHUSB_ASYNC_REPORT, | |
270 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
271 | 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); | |
272 | dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", | |
273 | __FUNCTION__, ret); | |
274 | if (ret < 0) | |
275 | return ret; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | #endif | |
280 | ||
281 | ||
282 | /***************************************************************************** | |
283 | * ITM Part | |
284 | */ | |
285 | #ifdef CONFIG_USB_TOUCHSCREEN_ITM | |
286 | static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press) | |
287 | { | |
288 | *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); | |
289 | *x = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); | |
290 | *press = ((pkt[2] & 0x1F) << 7) | (pkt[5] & 0x7F); | |
291 | *touch = ~pkt[7] & 0x20; | |
292 | ||
293 | return 1; | |
294 | } | |
295 | #endif | |
296 | ||
297 | ||
298 | /***************************************************************************** | |
299 | * the different device descriptors | |
300 | */ | |
301 | static struct usbtouch_device_info usbtouch_dev_info[] = { | |
302 | #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX | |
303 | [DEVTYPE_EGALAX] = { | |
304 | .min_xc = 0x0, | |
305 | .max_xc = 0x07ff, | |
306 | .min_yc = 0x0, | |
307 | .max_yc = 0x07ff, | |
308 | .rept_size = 16, | |
309 | .flags = USBTOUCH_FLG_BUFFER, | |
310 | .process_pkt = egalax_process, | |
311 | .read_data = egalax_read_data, | |
312 | }, | |
313 | #endif | |
314 | ||
315 | #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT | |
316 | [DEVTYPE_PANJIT] = { | |
317 | .min_xc = 0x0, | |
318 | .max_xc = 0x0fff, | |
319 | .min_yc = 0x0, | |
320 | .max_yc = 0x0fff, | |
321 | .rept_size = 8, | |
322 | .read_data = panjit_read_data, | |
323 | }, | |
324 | #endif | |
325 | ||
326 | #ifdef CONFIG_USB_TOUCHSCREEN_3M | |
327 | [DEVTYPE_3M] = { | |
328 | .min_xc = 0x0, | |
329 | .max_xc = 0x4000, | |
330 | .min_yc = 0x0, | |
331 | .max_yc = 0x4000, | |
332 | .rept_size = 11, | |
333 | .read_data = mtouch_read_data, | |
334 | .init = mtouch_init, | |
335 | }, | |
336 | #endif | |
337 | ||
338 | #ifdef CONFIG_USB_TOUCHSCREEN_ITM | |
339 | [DEVTYPE_ITM] = { | |
340 | .min_xc = 0x0, | |
341 | .max_xc = 0x0fff, | |
342 | .min_yc = 0x0, | |
343 | .max_yc = 0x0fff, | |
344 | .max_press = 0xff, | |
345 | .rept_size = 8, | |
346 | .read_data = itm_read_data, | |
347 | }, | |
348 | #endif | |
349 | }; | |
350 | ||
351 | ||
352 | /***************************************************************************** | |
353 | * Generic Part | |
354 | */ | |
355 | static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, | |
356 | struct pt_regs *regs, unsigned char *pkt, int len) | |
357 | { | |
358 | int x, y, touch, press; | |
359 | struct usbtouch_device_info *type = usbtouch->type; | |
360 | ||
361 | if (!type->read_data(pkt, &x, &y, &touch, &press)) | |
362 | return; | |
363 | ||
364 | input_regs(usbtouch->input, regs); | |
365 | input_report_key(usbtouch->input, BTN_TOUCH, touch); | |
366 | ||
367 | if (swap_xy) { | |
368 | input_report_abs(usbtouch->input, ABS_X, y); | |
369 | input_report_abs(usbtouch->input, ABS_Y, x); | |
370 | } else { | |
371 | input_report_abs(usbtouch->input, ABS_X, x); | |
372 | input_report_abs(usbtouch->input, ABS_Y, y); | |
373 | } | |
374 | if (type->max_press) | |
375 | input_report_abs(usbtouch->input, ABS_PRESSURE, press); | |
376 | input_sync(usbtouch->input); | |
377 | } | |
378 | ||
379 | ||
380 | static void usbtouch_irq(struct urb *urb, struct pt_regs *regs) | |
381 | { | |
382 | struct usbtouch_usb *usbtouch = urb->context; | |
383 | int retval; | |
384 | ||
385 | switch (urb->status) { | |
386 | case 0: | |
387 | /* success */ | |
388 | break; | |
389 | case -ETIMEDOUT: | |
390 | /* this urb is timing out */ | |
391 | dbg("%s - urb timed out - was the device unplugged?", | |
392 | __FUNCTION__); | |
393 | return; | |
394 | case -ECONNRESET: | |
395 | case -ENOENT: | |
396 | case -ESHUTDOWN: | |
397 | /* this urb is terminated, clean up */ | |
398 | dbg("%s - urb shutting down with status: %d", | |
399 | __FUNCTION__, urb->status); | |
400 | return; | |
401 | default: | |
402 | dbg("%s - nonzero urb status received: %d", | |
403 | __FUNCTION__, urb->status); | |
404 | goto exit; | |
405 | } | |
406 | ||
407 | usbtouch->type->process_pkt(usbtouch, regs, usbtouch->data, urb->actual_length); | |
408 | ||
409 | exit: | |
410 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
411 | if (retval) | |
412 | err("%s - usb_submit_urb failed with result: %d", | |
413 | __FUNCTION__, retval); | |
414 | } | |
415 | ||
416 | static int usbtouch_open(struct input_dev *input) | |
417 | { | |
418 | struct usbtouch_usb *usbtouch = input->private; | |
419 | ||
420 | usbtouch->irq->dev = usbtouch->udev; | |
421 | ||
422 | if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) | |
423 | return -EIO; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | static void usbtouch_close(struct input_dev *input) | |
429 | { | |
430 | struct usbtouch_usb *usbtouch = input->private; | |
431 | ||
432 | usb_kill_urb(usbtouch->irq); | |
433 | } | |
434 | ||
435 | ||
436 | static void usbtouch_free_buffers(struct usb_device *udev, | |
437 | struct usbtouch_usb *usbtouch) | |
438 | { | |
439 | if (usbtouch->data) | |
440 | usb_buffer_free(udev, usbtouch->type->rept_size, | |
441 | usbtouch->data, usbtouch->data_dma); | |
442 | kfree(usbtouch->buffer); | |
443 | } | |
444 | ||
445 | ||
446 | static int usbtouch_probe(struct usb_interface *intf, | |
447 | const struct usb_device_id *id) | |
448 | { | |
449 | struct usbtouch_usb *usbtouch; | |
450 | struct input_dev *input_dev; | |
451 | struct usb_host_interface *interface; | |
452 | struct usb_endpoint_descriptor *endpoint; | |
453 | struct usb_device *udev = interface_to_usbdev(intf); | |
454 | struct usbtouch_device_info *type; | |
455 | int err; | |
456 | ||
457 | interface = intf->cur_altsetting; | |
458 | endpoint = &interface->endpoint[0].desc; | |
459 | ||
460 | usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); | |
461 | input_dev = input_allocate_device(); | |
462 | if (!usbtouch || !input_dev) | |
463 | goto out_free; | |
464 | ||
465 | type = &usbtouch_dev_info[id->driver_info]; | |
466 | usbtouch->type = type; | |
467 | if (!type->process_pkt) | |
468 | type->process_pkt = usbtouch_process_pkt; | |
469 | ||
470 | usbtouch->data = usb_buffer_alloc(udev, type->rept_size, | |
471 | SLAB_KERNEL, &usbtouch->data_dma); | |
472 | if (!usbtouch->data) | |
473 | goto out_free; | |
474 | ||
475 | if (type->flags & USBTOUCH_FLG_BUFFER) { | |
476 | usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); | |
477 | if (!usbtouch->buffer) | |
478 | goto out_free_buffers; | |
479 | } | |
480 | ||
481 | usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); | |
482 | if (!usbtouch->irq) { | |
483 | dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__); | |
484 | goto out_free_buffers; | |
485 | } | |
486 | ||
487 | usbtouch->udev = udev; | |
488 | usbtouch->input = input_dev; | |
489 | ||
490 | if (udev->manufacturer) | |
491 | strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); | |
492 | ||
493 | if (udev->product) { | |
494 | if (udev->manufacturer) | |
495 | strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); | |
496 | strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); | |
497 | } | |
498 | ||
499 | if (!strlen(usbtouch->name)) | |
500 | snprintf(usbtouch->name, sizeof(usbtouch->name), | |
501 | "USB Touchscreen %04x:%04x", | |
502 | le16_to_cpu(udev->descriptor.idVendor), | |
503 | le16_to_cpu(udev->descriptor.idProduct)); | |
504 | ||
505 | usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); | |
506 | strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); | |
507 | ||
508 | input_dev->name = usbtouch->name; | |
509 | input_dev->phys = usbtouch->phys; | |
510 | usb_to_input_id(udev, &input_dev->id); | |
511 | input_dev->cdev.dev = &intf->dev; | |
512 | input_dev->private = usbtouch; | |
513 | input_dev->open = usbtouch_open; | |
514 | input_dev->close = usbtouch_close; | |
515 | ||
516 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); | |
517 | input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); | |
518 | input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); | |
519 | input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); | |
520 | if (type->max_press) | |
521 | input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, | |
522 | type->max_press, 0, 0); | |
523 | ||
524 | usb_fill_int_urb(usbtouch->irq, usbtouch->udev, | |
525 | usb_rcvintpipe(usbtouch->udev, 0x81), | |
526 | usbtouch->data, type->rept_size, | |
527 | usbtouch_irq, usbtouch, endpoint->bInterval); | |
528 | ||
529 | usbtouch->irq->transfer_dma = usbtouch->data_dma; | |
530 | usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
531 | ||
532 | /* device specific init */ | |
533 | if (type->init) { | |
534 | err = type->init(usbtouch); | |
535 | if (err) { | |
536 | dbg("%s - type->init() failed, err: %d", __FUNCTION__, err); | |
537 | goto out_free_buffers; | |
538 | } | |
539 | } | |
540 | ||
541 | err = input_register_device(usbtouch->input); | |
542 | if (err) { | |
543 | dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err); | |
544 | goto out_free_buffers; | |
545 | } | |
546 | ||
547 | usb_set_intfdata(intf, usbtouch); | |
548 | ||
549 | return 0; | |
550 | ||
551 | out_free_buffers: | |
552 | usbtouch_free_buffers(udev, usbtouch); | |
553 | out_free: | |
554 | input_free_device(input_dev); | |
555 | kfree(usbtouch); | |
556 | return -ENOMEM; | |
557 | } | |
558 | ||
559 | static void usbtouch_disconnect(struct usb_interface *intf) | |
560 | { | |
561 | struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); | |
562 | ||
563 | dbg("%s - called", __FUNCTION__); | |
564 | ||
565 | if (!usbtouch) | |
566 | return; | |
567 | ||
568 | dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__); | |
569 | usb_set_intfdata(intf, NULL); | |
570 | usb_kill_urb(usbtouch->irq); | |
571 | input_unregister_device(usbtouch->input); | |
572 | usb_free_urb(usbtouch->irq); | |
573 | usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); | |
574 | kfree(usbtouch); | |
575 | } | |
576 | ||
577 | MODULE_DEVICE_TABLE(usb, usbtouch_devices); | |
578 | ||
579 | static struct usb_driver usbtouch_driver = { | |
580 | .name = "usbtouchscreen", | |
581 | .probe = usbtouch_probe, | |
582 | .disconnect = usbtouch_disconnect, | |
583 | .id_table = usbtouch_devices, | |
584 | }; | |
585 | ||
586 | static int __init usbtouch_init(void) | |
587 | { | |
588 | return usb_register(&usbtouch_driver); | |
589 | } | |
590 | ||
591 | static void __exit usbtouch_cleanup(void) | |
592 | { | |
593 | usb_deregister(&usbtouch_driver); | |
594 | } | |
595 | ||
596 | module_init(usbtouch_init); | |
597 | module_exit(usbtouch_cleanup); | |
598 | ||
599 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
600 | MODULE_DESCRIPTION(DRIVER_DESC); | |
601 | MODULE_LICENSE("GPL"); | |
602 | ||
603 | MODULE_ALIAS("touchkitusb"); | |
604 | MODULE_ALIAS("itmtouch"); | |
605 | MODULE_ALIAS("mtouchusb"); |