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a19ceb56 JR |
1 | /* -*- linux-c -*- |
2 | ||
3 | GTCO digitizer USB driver | |
4 | ||
5 | Use the err(), dbg() and info() macros from usb.h for system logging | |
6 | ||
7 | TO CHECK: Is pressure done right on report 5? | |
8 | ||
9 | Copyright (C) 2006 GTCO CalComp | |
10 | ||
11 | This program is free software; you can redistribute it and/or | |
12 | modify it under the terms of the GNU General Public License | |
13 | as published by the Free Software Foundation; version 2 | |
14 | of the License. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
24 | ||
25 | Permission to use, copy, modify, distribute, and sell this software and its | |
26 | documentation for any purpose is hereby granted without fee, provided that | |
27 | the above copyright notice appear in all copies and that both that | |
28 | copyright notice and this permission notice appear in supporting | |
29 | documentation, and that the name of GTCO-CalComp not be used in advertising | |
30 | or publicity pertaining to distribution of the software without specific, | |
31 | written prior permission. GTCO-CalComp makes no representations about the | |
32 | suitability of this software for any purpose. It is provided "as is" | |
33 | without express or implied warranty. | |
34 | ||
35 | GTCO-CALCOMP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
36 | INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
37 | EVENT SHALL GTCO-CALCOMP BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
38 | CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
39 | DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
40 | TORTIOUS ACTIONS, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
41 | PERFORMANCE OF THIS SOFTWARE. | |
42 | ||
43 | GTCO CalComp, Inc. | |
44 | 7125 Riverwood Drive | |
45 | Columbia, MD 21046 | |
46 | ||
47 | Jeremy Roberson jroberson@gtcocalcomp.com | |
48 | Scott Hill shill@gtcocalcomp.com | |
49 | */ | |
50 | ||
51 | ||
52 | ||
53 | /*#define DEBUG*/ | |
54 | ||
55 | #include <linux/kernel.h> | |
56 | #include <linux/module.h> | |
57 | #include <linux/errno.h> | |
58 | #include <linux/init.h> | |
59 | #include <linux/slab.h> | |
60 | #include <linux/input.h> | |
61 | #include <linux/usb.h> | |
62 | #include <asm/uaccess.h> | |
63 | #include <asm/unaligned.h> | |
64 | #include <asm/byteorder.h> | |
65 | ||
66 | ||
67 | #include <linux/version.h> | |
68 | #include <linux/usb/input.h> | |
69 | ||
70 | /* Version with a Major number of 2 is for kernel inclusion only. */ | |
71 | #define GTCO_VERSION "2.00.0006" | |
72 | ||
73 | ||
74 | /* MACROS */ | |
75 | ||
76 | #define VENDOR_ID_GTCO 0x078C | |
77 | #define PID_400 0x400 | |
78 | #define PID_401 0x401 | |
79 | #define PID_1000 0x1000 | |
80 | #define PID_1001 0x1001 | |
81 | #define PID_1002 0x1002 | |
82 | ||
83 | /* Max size of a single report */ | |
84 | #define REPORT_MAX_SIZE 10 | |
85 | ||
86 | ||
87 | /* Bitmask whether pen is in range */ | |
88 | #define MASK_INRANGE 0x20 | |
89 | #define MASK_BUTTON 0x01F | |
90 | ||
91 | #define PATHLENGTH 64 | |
92 | ||
93 | /* DATA STRUCTURES */ | |
94 | ||
95 | /* Device table */ | |
96 | static struct usb_device_id gtco_usbid_table [] = { | |
97 | { USB_DEVICE(VENDOR_ID_GTCO, PID_400) }, | |
98 | { USB_DEVICE(VENDOR_ID_GTCO, PID_401) }, | |
99 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1000) }, | |
100 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1001) }, | |
101 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1002) }, | |
102 | { } | |
103 | }; | |
104 | MODULE_DEVICE_TABLE (usb, gtco_usbid_table); | |
105 | ||
106 | ||
107 | /* Structure to hold all of our device specific stuff */ | |
108 | struct gtco { | |
109 | ||
110 | struct input_dev *inputdevice; /* input device struct pointer */ | |
111 | struct usb_device *usbdev; /* the usb device for this device */ | |
112 | struct urb *urbinfo; /* urb for incoming reports */ | |
113 | dma_addr_t buf_dma; /* dma addr of the data buffer*/ | |
114 | unsigned char * buffer; /* databuffer for reports */ | |
115 | ||
116 | char usbpath[PATHLENGTH]; | |
117 | int openCount; | |
118 | ||
119 | /* Information pulled from Report Descriptor */ | |
120 | u32 usage; | |
121 | u32 min_X; | |
122 | u32 max_X; | |
123 | u32 min_Y; | |
124 | u32 max_Y; | |
125 | s8 mintilt_X; | |
126 | s8 maxtilt_X; | |
127 | s8 mintilt_Y; | |
128 | s8 maxtilt_Y; | |
129 | u32 maxpressure; | |
130 | u32 minpressure; | |
131 | }; | |
132 | ||
133 | ||
134 | ||
135 | /* Code for parsing the HID REPORT DESCRIPTOR */ | |
136 | ||
137 | /* From HID1.11 spec */ | |
138 | struct hid_descriptor | |
139 | { | |
140 | struct usb_descriptor_header header; | |
141 | __le16 bcdHID; | |
142 | u8 bCountryCode; | |
143 | u8 bNumDescriptors; | |
144 | u8 bDescriptorType; | |
145 | __le16 wDescriptorLength; | |
146 | } __attribute__ ((packed)); | |
147 | ||
148 | ||
149 | #define HID_DESCRIPTOR_SIZE 9 | |
150 | #define HID_DEVICE_TYPE 33 | |
151 | #define REPORT_DEVICE_TYPE 34 | |
152 | ||
153 | ||
154 | #define PREF_TAG(x) ((x)>>4) | |
155 | #define PREF_TYPE(x) ((x>>2)&0x03) | |
156 | #define PREF_SIZE(x) ((x)&0x03) | |
157 | ||
158 | #define TYPE_MAIN 0 | |
159 | #define TYPE_GLOBAL 1 | |
160 | #define TYPE_LOCAL 2 | |
161 | #define TYPE_RESERVED 3 | |
162 | ||
163 | #define TAG_MAIN_INPUT 0x8 | |
164 | #define TAG_MAIN_OUTPUT 0x9 | |
165 | #define TAG_MAIN_FEATURE 0xB | |
166 | #define TAG_MAIN_COL_START 0xA | |
167 | #define TAG_MAIN_COL_END 0xC | |
168 | ||
169 | #define TAG_GLOB_USAGE 0 | |
170 | #define TAG_GLOB_LOG_MIN 1 | |
171 | #define TAG_GLOB_LOG_MAX 2 | |
172 | #define TAG_GLOB_PHYS_MIN 3 | |
173 | #define TAG_GLOB_PHYS_MAX 4 | |
174 | #define TAG_GLOB_UNIT_EXP 5 | |
175 | #define TAG_GLOB_UNIT 6 | |
176 | #define TAG_GLOB_REPORT_SZ 7 | |
177 | #define TAG_GLOB_REPORT_ID 8 | |
178 | #define TAG_GLOB_REPORT_CNT 9 | |
179 | #define TAG_GLOB_PUSH 10 | |
180 | #define TAG_GLOB_POP 11 | |
181 | ||
182 | #define TAG_GLOB_MAX 12 | |
183 | ||
184 | #define DIGITIZER_USAGE_TIP_PRESSURE 0x30 | |
185 | #define DIGITIZER_USAGE_TILT_X 0x3D | |
186 | #define DIGITIZER_USAGE_TILT_Y 0x3E | |
187 | ||
188 | ||
189 | /* | |
190 | * | |
191 | * This is an abbreviated parser for the HID Report Descriptor. We | |
192 | * know what devices we are talking to, so this is by no means meant | |
193 | * to be generic. We can make some safe assumptions: | |
194 | * | |
195 | * - We know there are no LONG tags, all short | |
196 | * - We know that we have no MAIN Feature and MAIN Output items | |
197 | * - We know what the IRQ reports are supposed to look like. | |
198 | * | |
199 | * The main purpose of this is to use the HID report desc to figure | |
200 | * out the mins and maxs of the fields in the IRQ reports. The IRQ | |
201 | * reports for 400/401 change slightly if the max X is bigger than 64K. | |
202 | * | |
203 | */ | |
204 | static void parse_hid_report_descriptor(struct gtco *device, char * report, | |
205 | int length) | |
206 | { | |
207 | int x,i=0; | |
208 | ||
209 | /* Tag primitive vars */ | |
210 | __u8 prefix; | |
211 | __u8 size; | |
212 | __u8 tag; | |
213 | __u8 type; | |
214 | __u8 data = 0; | |
215 | __u16 data16 = 0; | |
216 | __u32 data32 = 0; | |
217 | ||
218 | ||
219 | /* For parsing logic */ | |
220 | int inputnum = 0; | |
221 | __u32 usage = 0; | |
222 | ||
223 | /* Global Values, indexed by TAG */ | |
224 | __u32 globalval[TAG_GLOB_MAX]; | |
225 | __u32 oldval[TAG_GLOB_MAX]; | |
226 | ||
227 | /* Debug stuff */ | |
228 | char maintype='x'; | |
229 | char globtype[12]; | |
230 | int indent=0; | |
231 | char indentstr[10]=""; | |
232 | ||
233 | ||
234 | ||
235 | dbg("======>>>>>>PARSE<<<<<<======"); | |
236 | ||
237 | /* Walk this report and pull out the info we need */ | |
238 | while (i<length){ | |
239 | prefix=report[i]; | |
240 | ||
241 | /* Skip over prefix */ | |
242 | i++; | |
243 | ||
244 | /* Determine data size and save the data in the proper variable */ | |
245 | size = PREF_SIZE(prefix); | |
246 | switch(size){ | |
247 | case 1: | |
248 | data = report[i]; | |
249 | break; | |
250 | case 2: | |
251 | data16 = le16_to_cpu(get_unaligned((__le16*)(&(report[i])))); | |
252 | break; | |
253 | case 3: | |
254 | size = 4; | |
255 | data32 = le32_to_cpu(get_unaligned((__le32*)(&(report[i])))); | |
256 | } | |
257 | ||
258 | /* Skip size of data */ | |
259 | i+=size; | |
260 | ||
261 | /* What we do depends on the tag type */ | |
262 | tag = PREF_TAG(prefix); | |
263 | type = PREF_TYPE(prefix); | |
264 | switch(type){ | |
265 | case TYPE_MAIN: | |
266 | strcpy(globtype,""); | |
267 | switch(tag){ | |
268 | ||
269 | case TAG_MAIN_INPUT: | |
270 | /* | |
271 | * The INPUT MAIN tag signifies this is | |
272 | * information from a report. We need to | |
273 | * figure out what it is and store the | |
274 | * min/max values | |
275 | */ | |
276 | ||
277 | maintype='I'; | |
278 | if (data==2){ | |
279 | strcpy(globtype,"Variable"); | |
280 | } | |
281 | if (data==3){ | |
282 | strcpy(globtype,"Var|Const"); | |
283 | } | |
284 | ||
285 | dbg("::::: Saving Report: %d input #%d Max: 0x%X(%d) Min:0x%X(%d) of %d bits", | |
286 | globalval[TAG_GLOB_REPORT_ID],inputnum, | |
287 | globalval[TAG_GLOB_LOG_MAX],globalval[TAG_GLOB_LOG_MAX], | |
288 | globalval[TAG_GLOB_LOG_MIN],globalval[TAG_GLOB_LOG_MIN], | |
289 | (globalval[TAG_GLOB_REPORT_SZ] * globalval[TAG_GLOB_REPORT_CNT])); | |
290 | ||
291 | ||
292 | /* | |
293 | We can assume that the first two input items | |
294 | are always the X and Y coordinates. After | |
295 | that, we look for everything else by | |
296 | local usage value | |
297 | */ | |
298 | switch (inputnum){ | |
299 | case 0: /* X coord */ | |
300 | dbg("GER: X Usage: 0x%x",usage); | |
301 | if (device->max_X == 0){ | |
302 | device->max_X = globalval[TAG_GLOB_LOG_MAX]; | |
303 | device->min_X = globalval[TAG_GLOB_LOG_MIN]; | |
304 | } | |
305 | ||
306 | break; | |
307 | case 1: /* Y coord */ | |
308 | dbg("GER: Y Usage: 0x%x",usage); | |
309 | if (device->max_Y == 0){ | |
310 | device->max_Y = globalval[TAG_GLOB_LOG_MAX]; | |
311 | device->min_Y = globalval[TAG_GLOB_LOG_MIN]; | |
312 | } | |
313 | break; | |
314 | default: | |
315 | /* Tilt X */ | |
316 | if (usage == DIGITIZER_USAGE_TILT_X){ | |
317 | if (device->maxtilt_X == 0){ | |
318 | device->maxtilt_X = globalval[TAG_GLOB_LOG_MAX]; | |
319 | device->mintilt_X = globalval[TAG_GLOB_LOG_MIN]; | |
320 | } | |
321 | } | |
322 | ||
323 | /* Tilt Y */ | |
324 | if (usage == DIGITIZER_USAGE_TILT_Y){ | |
325 | if (device->maxtilt_Y == 0){ | |
326 | device->maxtilt_Y = globalval[TAG_GLOB_LOG_MAX]; | |
327 | device->mintilt_Y = globalval[TAG_GLOB_LOG_MIN]; | |
328 | } | |
329 | } | |
330 | ||
331 | ||
332 | /* Pressure */ | |
333 | if (usage == DIGITIZER_USAGE_TIP_PRESSURE){ | |
334 | if (device->maxpressure == 0){ | |
335 | device->maxpressure = globalval[TAG_GLOB_LOG_MAX]; | |
336 | device->minpressure = globalval[TAG_GLOB_LOG_MIN]; | |
337 | } | |
338 | } | |
339 | ||
340 | break; | |
341 | } | |
342 | ||
343 | inputnum++; | |
344 | ||
345 | ||
346 | break; | |
347 | case TAG_MAIN_OUTPUT: | |
348 | maintype='O'; | |
349 | break; | |
350 | case TAG_MAIN_FEATURE: | |
351 | maintype='F'; | |
352 | break; | |
353 | case TAG_MAIN_COL_START: | |
354 | maintype='S'; | |
355 | ||
356 | if (data==0){ | |
357 | dbg("======>>>>>> Physical"); | |
358 | strcpy(globtype,"Physical"); | |
359 | }else{ | |
360 | dbg("======>>>>>>"); | |
361 | } | |
362 | ||
363 | /* Indent the debug output */ | |
364 | indent++; | |
365 | for (x=0;x<indent;x++){ | |
366 | indentstr[x]='-'; | |
367 | } | |
368 | indentstr[x]=0; | |
369 | ||
370 | /* Save global tags */ | |
371 | for (x=0;x<TAG_GLOB_MAX;x++){ | |
372 | oldval[x] = globalval[x]; | |
373 | } | |
374 | ||
375 | break; | |
376 | case TAG_MAIN_COL_END: | |
377 | dbg("<<<<<<======"); | |
378 | maintype='E'; | |
379 | indent--; | |
380 | for (x=0;x<indent;x++){ | |
381 | indentstr[x]='-'; | |
382 | } | |
383 | indentstr[x]=0; | |
384 | ||
385 | /* Copy global tags back */ | |
386 | for (x=0;x<TAG_GLOB_MAX;x++){ | |
387 | globalval[x] = oldval[x]; | |
388 | } | |
389 | ||
390 | break; | |
391 | } | |
392 | ||
393 | switch (size){ | |
394 | case 1: | |
395 | dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", | |
396 | indentstr,tag,maintype,size,globtype,data); | |
397 | break; | |
398 | case 2: | |
399 | dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", | |
400 | indentstr,tag,maintype,size,globtype, data16); | |
401 | break; | |
402 | case 4: | |
403 | dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", | |
404 | indentstr,tag,maintype,size,globtype,data32); | |
405 | break; | |
406 | } | |
407 | break; | |
408 | case TYPE_GLOBAL: | |
409 | switch(tag){ | |
410 | case TAG_GLOB_USAGE: | |
411 | /* | |
412 | * First time we hit the global usage tag, | |
413 | * it should tell us the type of device | |
414 | */ | |
415 | if (device->usage == 0){ | |
416 | device->usage = data; | |
417 | } | |
418 | strcpy(globtype,"USAGE"); | |
419 | break; | |
420 | case TAG_GLOB_LOG_MIN : | |
421 | strcpy(globtype,"LOG_MIN"); | |
422 | break; | |
423 | case TAG_GLOB_LOG_MAX : | |
424 | strcpy(globtype,"LOG_MAX"); | |
425 | break; | |
426 | case TAG_GLOB_PHYS_MIN : | |
427 | strcpy(globtype,"PHYS_MIN"); | |
428 | break; | |
429 | case TAG_GLOB_PHYS_MAX : | |
430 | strcpy(globtype,"PHYS_MAX"); | |
431 | break; | |
432 | case TAG_GLOB_UNIT_EXP : | |
433 | strcpy(globtype,"EXP"); | |
434 | break; | |
435 | case TAG_GLOB_UNIT : | |
436 | strcpy(globtype,"UNIT"); | |
437 | break; | |
438 | case TAG_GLOB_REPORT_SZ : | |
439 | strcpy(globtype,"REPORT_SZ"); | |
440 | break; | |
441 | case TAG_GLOB_REPORT_ID : | |
442 | strcpy(globtype,"REPORT_ID"); | |
443 | /* New report, restart numbering */ | |
444 | inputnum=0; | |
445 | break; | |
446 | case TAG_GLOB_REPORT_CNT: | |
447 | strcpy(globtype,"REPORT_CNT"); | |
448 | break; | |
449 | case TAG_GLOB_PUSH : | |
450 | strcpy(globtype,"PUSH"); | |
451 | break; | |
452 | case TAG_GLOB_POP: | |
453 | strcpy(globtype,"POP"); | |
454 | break; | |
455 | } | |
456 | ||
457 | ||
458 | /* Check to make sure we have a good tag number | |
459 | so we don't overflow array */ | |
460 | if (tag < TAG_GLOB_MAX){ | |
461 | switch (size){ | |
462 | case 1: | |
463 | dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x",indentstr,globtype,tag,size,data); | |
464 | globalval[tag]=data; | |
465 | break; | |
466 | case 2: | |
467 | dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x",indentstr,globtype,tag,size,data16); | |
468 | globalval[tag]=data16; | |
469 | break; | |
470 | case 4: | |
471 | dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x",indentstr,globtype,tag,size,data32); | |
472 | globalval[tag]=data32; | |
473 | break; | |
474 | } | |
475 | }else{ | |
476 | dbg("%sGLOBALTAG: ILLEGAL TAG:%d SIZE: %d ", | |
477 | indentstr,tag,size); | |
478 | } | |
479 | ||
480 | ||
481 | break; | |
482 | ||
483 | case TYPE_LOCAL: | |
484 | switch(tag){ | |
485 | case TAG_GLOB_USAGE: | |
486 | strcpy(globtype,"USAGE"); | |
487 | /* Always 1 byte */ | |
488 | usage = data; | |
489 | break; | |
490 | case TAG_GLOB_LOG_MIN : | |
491 | strcpy(globtype,"MIN"); | |
492 | break; | |
493 | case TAG_GLOB_LOG_MAX : | |
494 | strcpy(globtype,"MAX"); | |
495 | break; | |
496 | default: | |
497 | strcpy(globtype,"UNKNOWN"); | |
498 | } | |
499 | ||
500 | switch (size){ | |
501 | case 1: | |
502 | dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", | |
503 | indentstr,tag,globtype,size,data); | |
504 | break; | |
505 | case 2: | |
506 | dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", | |
507 | indentstr,tag,globtype,size,data16); | |
508 | break; | |
509 | case 4: | |
510 | dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", | |
511 | indentstr,tag,globtype,size,data32); | |
512 | break; | |
513 | } | |
514 | ||
515 | break; | |
516 | } | |
517 | ||
518 | } | |
519 | ||
520 | } | |
521 | ||
522 | ||
523 | ||
524 | /* INPUT DRIVER Routines */ | |
525 | ||
526 | ||
527 | /* | |
528 | * Called when opening the input device. This will submit the URB to | |
529 | * the usb system so we start getting reports | |
530 | */ | |
531 | static int gtco_input_open(struct input_dev *inputdev) | |
532 | { | |
533 | struct gtco *device; | |
534 | device = inputdev->private; | |
535 | ||
536 | device->urbinfo->dev = device->usbdev; | |
537 | if (usb_submit_urb(device->urbinfo, GFP_KERNEL)) { | |
538 | return -EIO; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /** | |
544 | Called when closing the input device. This will unlink the URB | |
545 | */ | |
546 | static void gtco_input_close(struct input_dev *inputdev) | |
547 | { | |
548 | struct gtco *device = inputdev->private; | |
549 | ||
550 | usb_kill_urb(device->urbinfo); | |
551 | ||
552 | } | |
553 | ||
554 | ||
555 | /* | |
556 | * Setup input device capabilities. Tell the input system what this | |
557 | * device is capable of generating. | |
558 | * | |
559 | * This information is based on what is read from the HID report and | |
560 | * placed in the struct gtco structure | |
561 | * | |
562 | */ | |
563 | static void gtco_setup_caps(struct input_dev *inputdev) | |
564 | { | |
565 | struct gtco *device = inputdev->private; | |
566 | ||
567 | ||
568 | /* Which events */ | |
569 | inputdev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC); | |
570 | ||
571 | ||
572 | /* Misc event menu block */ | |
573 | inputdev->mscbit[0] = BIT(MSC_SCAN)|BIT(MSC_SERIAL)|BIT(MSC_RAW) ; | |
574 | ||
575 | ||
576 | /* Absolute values based on HID report info */ | |
577 | input_set_abs_params(inputdev, ABS_X, device->min_X, device->max_X, | |
578 | 0, 0); | |
579 | input_set_abs_params(inputdev, ABS_Y, device->min_Y, device->max_Y, | |
580 | 0, 0); | |
581 | ||
582 | /* Proximity */ | |
583 | input_set_abs_params(inputdev, ABS_DISTANCE, 0, 1, 0, 0); | |
584 | ||
585 | /* Tilt & pressure */ | |
586 | input_set_abs_params(inputdev, ABS_TILT_X, device->mintilt_X, | |
587 | device->maxtilt_X, 0, 0); | |
588 | input_set_abs_params(inputdev, ABS_TILT_Y, device->mintilt_Y, | |
589 | device->maxtilt_Y, 0, 0); | |
590 | input_set_abs_params(inputdev, ABS_PRESSURE, device->minpressure, | |
591 | device->maxpressure, 0, 0); | |
592 | ||
593 | ||
594 | /* Transducer */ | |
595 | input_set_abs_params(inputdev, ABS_MISC, 0,0xFF, 0, 0); | |
596 | ||
597 | } | |
598 | ||
599 | ||
600 | ||
601 | /* USB Routines */ | |
602 | ||
603 | ||
604 | /* | |
605 | * URB callback routine. Called when we get IRQ reports from the | |
606 | * digitizer. | |
607 | * | |
608 | * This bridges the USB and input device worlds. It generates events | |
609 | * on the input device based on the USB reports. | |
610 | */ | |
611 | static void gtco_urb_callback(struct urb *urbinfo) | |
612 | { | |
613 | ||
614 | ||
615 | struct gtco *device = urbinfo->context; | |
616 | struct input_dev *inputdev; | |
617 | int rc; | |
618 | u32 val = 0; | |
619 | s8 valsigned = 0; | |
620 | char le_buffer[2]; | |
621 | ||
622 | inputdev = device->inputdevice; | |
623 | ||
624 | ||
625 | /* Was callback OK? */ | |
626 | if ((urbinfo->status == -ECONNRESET ) || | |
627 | (urbinfo->status == -ENOENT ) || | |
628 | (urbinfo->status == -ESHUTDOWN )){ | |
629 | ||
630 | /* Shutdown is occurring. Return and don't queue up any more */ | |
631 | return; | |
632 | } | |
633 | ||
634 | if (urbinfo->status != 0 ) { | |
635 | /* Some unknown error. Hopefully temporary. Just go and */ | |
636 | /* requeue an URB */ | |
637 | goto resubmit; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Good URB, now process | |
642 | */ | |
643 | ||
644 | /* PID dependent when we interpret the report */ | |
645 | if ((inputdev->id.product == PID_1000 )|| | |
646 | (inputdev->id.product == PID_1001 )|| | |
647 | (inputdev->id.product == PID_1002 )) | |
648 | { | |
649 | ||
650 | /* | |
651 | * Switch on the report ID | |
652 | * Conveniently, the reports have more information, the higher | |
653 | * the report number. We can just fall through the case | |
654 | * statements if we start with the highest number report | |
655 | */ | |
656 | switch(device->buffer[0]){ | |
657 | case 5: | |
658 | /* Pressure is 9 bits */ | |
659 | val = ((u16)(device->buffer[8]) << 1); | |
660 | val |= (u16)(device->buffer[7] >> 7); | |
661 | input_report_abs(inputdev, ABS_PRESSURE, | |
662 | device->buffer[8]); | |
663 | ||
664 | /* Mask out the Y tilt value used for pressure */ | |
665 | device->buffer[7] = (u8)((device->buffer[7]) & 0x7F); | |
666 | ||
667 | ||
668 | /* Fall thru */ | |
669 | case 4: | |
670 | /* Tilt */ | |
671 | ||
672 | /* Sign extend these 7 bit numbers. */ | |
673 | if (device->buffer[6] & 0x40) | |
674 | device->buffer[6] |= 0x80; | |
675 | ||
676 | if (device->buffer[7] & 0x40) | |
677 | device->buffer[7] |= 0x80; | |
678 | ||
679 | ||
680 | valsigned = (device->buffer[6]); | |
681 | input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned); | |
682 | ||
683 | valsigned = (device->buffer[7]); | |
684 | input_report_abs(inputdev, ABS_TILT_Y, (s32)valsigned); | |
685 | ||
686 | /* Fall thru */ | |
687 | ||
688 | case 2: | |
689 | case 3: | |
690 | /* Convert buttons, only 5 bits possible */ | |
691 | val = (device->buffer[5])&MASK_BUTTON; | |
692 | ||
693 | /* We don't apply any meaning to the bitmask, | |
694 | just report */ | |
695 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
696 | ||
697 | /* Fall thru */ | |
698 | case 1: | |
699 | ||
700 | /* All reports have X and Y coords in the same place */ | |
701 | val = le16_to_cpu(get_unaligned((__le16 *) &(device->buffer[1]))); | |
702 | input_report_abs(inputdev, ABS_X, val); | |
703 | ||
704 | val = le16_to_cpu(get_unaligned((__le16 *) &(device->buffer[3]))); | |
705 | input_report_abs(inputdev, ABS_Y, val); | |
706 | ||
707 | ||
708 | /* Ditto for proximity bit */ | |
709 | if (device->buffer[5]& MASK_INRANGE){ | |
710 | val = 1; | |
711 | }else{ | |
712 | val=0; | |
713 | } | |
714 | input_report_abs(inputdev, ABS_DISTANCE, val); | |
715 | ||
716 | ||
717 | /* Report 1 is an exception to how we handle buttons */ | |
718 | /* Buttons are an index, not a bitmask */ | |
719 | if (device->buffer[0] == 1){ | |
720 | ||
721 | /* Convert buttons, 5 bit index */ | |
722 | /* Report value of index set as one, | |
723 | the rest as 0 */ | |
724 | val = device->buffer[5]& MASK_BUTTON; | |
725 | dbg("======>>>>>>REPORT 1: val 0x%X(%d)", | |
726 | val,val); | |
727 | ||
728 | /* | |
729 | * We don't apply any meaning to the button | |
730 | * index, just report it | |
731 | */ | |
732 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
733 | ||
734 | ||
735 | } | |
736 | ||
737 | break; | |
738 | case 7: | |
739 | /* Menu blocks */ | |
740 | input_event(inputdev, EV_MSC, MSC_SCAN, | |
741 | device->buffer[1]); | |
742 | ||
743 | ||
744 | break; | |
745 | ||
746 | } | |
747 | ||
748 | ||
749 | } | |
750 | /* Other pid class */ | |
751 | if ((inputdev->id.product == PID_400 )|| | |
752 | (inputdev->id.product == PID_401 )) | |
753 | { | |
754 | ||
755 | /* Report 2 */ | |
756 | if (device->buffer[0] == 2){ | |
757 | /* Menu blocks */ | |
758 | input_event(inputdev, EV_MSC, MSC_SCAN, | |
759 | device->buffer[1]); | |
760 | } | |
761 | ||
762 | /* Report 1 */ | |
763 | if (device->buffer[0] == 1){ | |
764 | char buttonbyte; | |
765 | ||
766 | ||
767 | /* IF X max > 64K, we still a bit from the y report */ | |
768 | if (device->max_X > 0x10000){ | |
769 | ||
770 | val = (u16)(((u16)(device->buffer[2]<<8))|((u8)(device->buffer[1]))); | |
771 | val |= (u32)(((u8)device->buffer[3]&0x1)<< 16); | |
772 | ||
773 | input_report_abs(inputdev, ABS_X, val); | |
774 | ||
775 | le_buffer[0] = (u8)((u8)(device->buffer[3])>>1); | |
776 | le_buffer[0] |= (u8)((device->buffer[3]&0x1)<<7); | |
777 | ||
778 | le_buffer[1] = (u8)(device->buffer[4]>>1); | |
779 | le_buffer[1] |= (u8)((device->buffer[5]&0x1)<<7); | |
780 | ||
781 | val = le16_to_cpu(get_unaligned((__le16 *)(le_buffer))); | |
782 | ||
783 | input_report_abs(inputdev, ABS_Y, val); | |
784 | ||
785 | ||
786 | /* | |
787 | * Shift the button byte right by one to | |
788 | * make it look like the standard report | |
789 | */ | |
790 | buttonbyte = (device->buffer[5])>>1; | |
791 | }else{ | |
792 | ||
793 | val = le16_to_cpu(get_unaligned((__le16 *) (&(device->buffer[1])))); | |
794 | input_report_abs(inputdev, ABS_X, val); | |
795 | ||
796 | val = le16_to_cpu(get_unaligned((__le16 *) (&(device->buffer[3])))); | |
797 | input_report_abs(inputdev, ABS_Y, val); | |
798 | ||
799 | buttonbyte = device->buffer[5]; | |
800 | ||
801 | } | |
802 | ||
803 | ||
804 | /* BUTTONS and PROXIMITY */ | |
805 | if (buttonbyte& MASK_INRANGE){ | |
806 | val = 1; | |
807 | }else{ | |
808 | val=0; | |
809 | } | |
810 | input_report_abs(inputdev, ABS_DISTANCE, val); | |
811 | ||
812 | /* Convert buttons, only 4 bits possible */ | |
813 | val = buttonbyte&0x0F; | |
814 | #ifdef USE_BUTTONS | |
815 | for ( i=0;i<5;i++){ | |
816 | input_report_key(inputdev, BTN_DIGI+i,val&(1<<i)); | |
817 | } | |
818 | #else | |
819 | /* We don't apply any meaning to the bitmask, just report */ | |
820 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
821 | #endif | |
822 | /* TRANSDUCER */ | |
823 | input_report_abs(inputdev, ABS_MISC, device->buffer[6]); | |
824 | ||
825 | } | |
826 | } | |
827 | ||
828 | /* Everybody gets report ID's */ | |
829 | input_event(inputdev, EV_MSC, MSC_RAW, device->buffer[0]); | |
830 | ||
831 | /* Sync it up */ | |
832 | input_sync(inputdev); | |
833 | ||
834 | resubmit: | |
835 | rc = usb_submit_urb(urbinfo, GFP_ATOMIC); | |
836 | if (rc != 0) { | |
837 | err("usb_submit_urb failed rc=0x%x",rc); | |
838 | } | |
839 | ||
840 | } | |
841 | ||
842 | /* | |
843 | * The probe routine. This is called when the kernel find the matching USB | |
844 | * vendor/product. We do the following: | |
845 | * | |
846 | * - Allocate mem for a local structure to manage the device | |
847 | * - Request a HID Report Descriptor from the device and parse it to | |
848 | * find out the device parameters | |
849 | * - Create an input device and assign it attributes | |
850 | * - Allocate an URB so the device can talk to us when the input | |
851 | * queue is open | |
852 | */ | |
853 | static int gtco_probe(struct usb_interface *usbinterface, | |
854 | const struct usb_device_id *id) | |
855 | { | |
856 | ||
857 | struct gtco *device = NULL; | |
858 | char path[PATHLENGTH]; | |
859 | struct input_dev *inputdev; | |
860 | struct hid_descriptor *hid_desc; | |
861 | char *report; | |
862 | int result=0, retry; | |
863 | struct usb_endpoint_descriptor *endpoint; | |
864 | ||
865 | /* Allocate memory for device structure */ | |
866 | device = kzalloc(sizeof(struct gtco), GFP_KERNEL); | |
867 | if (device == NULL) { | |
868 | err("No more memory"); | |
869 | return -ENOMEM; | |
870 | } | |
871 | ||
872 | ||
873 | device->inputdevice = input_allocate_device(); | |
874 | if (!device->inputdevice){ | |
875 | kfree(device); | |
876 | err("No more memory"); | |
877 | return -ENOMEM; | |
878 | } | |
879 | ||
880 | /* Get pointer to the input device */ | |
881 | inputdev = device->inputdevice; | |
882 | ||
883 | /* Save interface information */ | |
884 | device->usbdev = usb_get_dev(interface_to_usbdev(usbinterface)); | |
885 | ||
886 | ||
887 | /* Allocate some data for incoming reports */ | |
888 | device->buffer = usb_buffer_alloc(device->usbdev, REPORT_MAX_SIZE, | |
889 | GFP_KERNEL, &(device->buf_dma)); | |
890 | if (!device->buffer){ | |
891 | input_free_device(device->inputdevice); | |
892 | kfree(device); | |
893 | err("No more memory"); | |
894 | return -ENOMEM; | |
895 | } | |
896 | ||
897 | /* Allocate URB for reports */ | |
898 | device->urbinfo = usb_alloc_urb(0, GFP_KERNEL); | |
899 | if (!device->urbinfo) { | |
900 | usb_buffer_free(device->usbdev, REPORT_MAX_SIZE, | |
901 | device->buffer, device->buf_dma); | |
902 | input_free_device(device->inputdevice); | |
903 | kfree(device); | |
904 | err("No more memory"); | |
905 | return -ENOMEM; | |
906 | } | |
907 | ||
908 | ||
909 | /* | |
910 | * The endpoint is always altsetting 0, we know this since we know | |
911 | * this device only has one interrupt endpoint | |
912 | */ | |
913 | endpoint = &usbinterface->altsetting[0].endpoint[0].desc; | |
914 | ||
915 | /* Some debug */ | |
916 | dbg("gtco # interfaces: %d",usbinterface->num_altsetting); | |
917 | dbg("num endpoints: %d",usbinterface->cur_altsetting->desc.bNumEndpoints); | |
918 | dbg("interface class: %d",usbinterface->cur_altsetting->desc.bInterfaceClass); | |
919 | dbg("endpoint: attribute:0x%x type:0x%x",endpoint->bmAttributes,endpoint->bDescriptorType); | |
920 | if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) | |
921 | dbg("endpoint: we have interrupt endpoint\n"); | |
922 | ||
923 | dbg("endpoint extra len:%d ",usbinterface->altsetting[0].extralen); | |
924 | ||
925 | ||
926 | ||
927 | /* | |
928 | * Find the HID descriptor so we can find out the size of the | |
929 | * HID report descriptor | |
930 | */ | |
931 | if (usb_get_extra_descriptor(usbinterface->cur_altsetting, | |
932 | HID_DEVICE_TYPE,&hid_desc) != 0){ | |
933 | err("Can't retrieve exta USB descriptor to get hid report descriptor length"); | |
934 | usb_buffer_free(device->usbdev, REPORT_MAX_SIZE, | |
935 | device->buffer, device->buf_dma); | |
936 | input_free_device(device->inputdevice); | |
937 | kfree(device); | |
938 | return -EIO; | |
939 | } | |
940 | ||
941 | dbg("Extra descriptor success: type:%d len:%d", | |
942 | hid_desc->bDescriptorType, hid_desc->wDescriptorLength); | |
943 | ||
944 | if (!(report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL))) { | |
945 | usb_buffer_free(device->usbdev, REPORT_MAX_SIZE, | |
946 | device->buffer, device->buf_dma); | |
947 | ||
948 | input_free_device(device->inputdevice); | |
949 | kfree(device); | |
950 | err("No more memory"); | |
951 | return -ENOMEM; | |
952 | } | |
953 | ||
954 | /* Couple of tries to get reply */ | |
955 | for (retry=0;retry<3;retry++) { | |
956 | result = usb_control_msg(device->usbdev, | |
957 | usb_rcvctrlpipe(device->usbdev, 0), | |
958 | USB_REQ_GET_DESCRIPTOR, | |
959 | USB_RECIP_INTERFACE | USB_DIR_IN, | |
960 | (REPORT_DEVICE_TYPE << 8), | |
961 | 0, /* interface */ | |
962 | report, | |
963 | hid_desc->wDescriptorLength, | |
964 | 5000); /* 5 secs */ | |
965 | ||
966 | if (result == hid_desc->wDescriptorLength) | |
967 | break; | |
968 | } | |
969 | ||
970 | /* If we didn't get the report, fail */ | |
971 | dbg("usb_control_msg result: :%d", result); | |
972 | if (result != hid_desc->wDescriptorLength){ | |
973 | kfree(report); | |
974 | usb_buffer_free(device->usbdev, REPORT_MAX_SIZE, | |
975 | device->buffer, device->buf_dma); | |
976 | input_free_device(device->inputdevice); | |
977 | kfree(device); | |
978 | err("Failed to get HID Report Descriptor of size: %d", | |
979 | hid_desc->wDescriptorLength); | |
980 | return -EIO; | |
981 | } | |
982 | ||
983 | ||
984 | /* Now we parse the report */ | |
985 | parse_hid_report_descriptor(device,report,result); | |
986 | ||
987 | /* Now we delete it */ | |
988 | kfree(report); | |
989 | ||
990 | /* Create a device file node */ | |
991 | usb_make_path(device->usbdev, path, PATHLENGTH); | |
992 | sprintf(device->usbpath, "%s/input0", path); | |
993 | ||
994 | ||
995 | /* Set Input device functions */ | |
996 | inputdev->open = gtco_input_open; | |
997 | inputdev->close = gtco_input_close; | |
998 | ||
999 | /* Set input device information */ | |
1000 | inputdev->name = "GTCO_CalComp"; | |
1001 | inputdev->phys = device->usbpath; | |
1002 | inputdev->private = device; | |
1003 | ||
1004 | ||
1005 | /* Now set up all the input device capabilities */ | |
1006 | gtco_setup_caps(inputdev); | |
1007 | ||
1008 | /* Set input device required ID information */ | |
1009 | usb_to_input_id(device->usbdev, &device->inputdevice->id); | |
1010 | inputdev->cdev.dev = &usbinterface->dev; | |
1011 | ||
1012 | /* Setup the URB, it will be posted later on open of input device */ | |
1013 | endpoint = &usbinterface->altsetting[0].endpoint[0].desc; | |
1014 | ||
1015 | usb_fill_int_urb(device->urbinfo, | |
1016 | device->usbdev, | |
1017 | usb_rcvintpipe(device->usbdev, | |
1018 | endpoint->bEndpointAddress), | |
1019 | device->buffer, | |
1020 | REPORT_MAX_SIZE, | |
1021 | gtco_urb_callback, | |
1022 | device, | |
1023 | endpoint->bInterval); | |
1024 | ||
1025 | device->urbinfo->transfer_dma = device->buf_dma; | |
1026 | device->urbinfo->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1027 | ||
1028 | ||
1029 | /* Save device pointer in USB interface device */ | |
1030 | usb_set_intfdata(usbinterface, device); | |
1031 | ||
1032 | /* All done, now register the input device */ | |
1033 | input_register_device(inputdev); | |
1034 | ||
1035 | info( "gtco driver created usb: %s\n", path); | |
1036 | return 0; | |
1037 | ||
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * This function is a standard USB function called when the USB device | |
1042 | * is disconnected. We will get rid of the URV, de-register the input | |
1043 | * device, and free up allocated memory | |
1044 | */ | |
1045 | static void gtco_disconnect(struct usb_interface *interface) | |
1046 | { | |
1047 | ||
1048 | /* Grab private device ptr */ | |
1049 | struct gtco *device = usb_get_intfdata (interface); | |
1050 | struct input_dev *inputdev; | |
1051 | ||
1052 | inputdev = device->inputdevice; | |
1053 | ||
1054 | /* Now reverse all the registration stuff */ | |
1055 | if (device) { | |
1056 | input_unregister_device(inputdev); | |
1057 | usb_kill_urb(device->urbinfo); | |
1058 | usb_free_urb(device->urbinfo); | |
1059 | usb_buffer_free(device->usbdev, REPORT_MAX_SIZE, | |
1060 | device->buffer, device->buf_dma); | |
1061 | kfree(device); | |
1062 | } | |
1063 | ||
1064 | info("gtco driver disconnected"); | |
1065 | } | |
1066 | ||
1067 | ||
1068 | /* STANDARD MODULE LOAD ROUTINES */ | |
1069 | ||
1070 | static struct usb_driver gtco_driverinfo_table = { | |
1071 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)) | |
1072 | .owner = THIS_MODULE, | |
1073 | #endif | |
1074 | .name = "gtco", | |
1075 | .id_table = gtco_usbid_table, | |
1076 | .probe = gtco_probe, | |
1077 | .disconnect = gtco_disconnect, | |
1078 | }; | |
1079 | /* | |
1080 | * Register this module with the USB subsystem | |
1081 | */ | |
1082 | static int __init gtco_init(void) | |
1083 | { | |
1084 | int rc; | |
1085 | rc = usb_register(>co_driverinfo_table); | |
1086 | if (rc) { | |
1087 | err("usb_register() failed rc=0x%x", rc); | |
1088 | } | |
1089 | printk("GTCO usb driver version: %s",GTCO_VERSION); | |
1090 | return rc; | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * Deregister this module with the USB subsystem | |
1095 | */ | |
1096 | static void __exit gtco_exit(void) | |
1097 | { | |
1098 | usb_deregister(>co_driverinfo_table); | |
1099 | } | |
1100 | ||
1101 | module_init (gtco_init); | |
1102 | module_exit (gtco_exit); | |
1103 | ||
1104 | MODULE_LICENSE("GPL"); |