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a19ceb56 JR |
1 | /* -*- linux-c -*- |
2 | ||
3 | GTCO digitizer USB driver | |
4 | ||
a19ceb56 JR |
5 | TO CHECK: Is pressure done right on report 5? |
6 | ||
7 | Copyright (C) 2006 GTCO CalComp | |
8 | ||
9 | This program is free software; you can redistribute it and/or | |
10 | modify it under the terms of the GNU General Public License | |
11 | as published by the Free Software Foundation; version 2 | |
12 | of the License. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
22 | ||
23 | Permission to use, copy, modify, distribute, and sell this software and its | |
24 | documentation for any purpose is hereby granted without fee, provided that | |
25 | the above copyright notice appear in all copies and that both that | |
26 | copyright notice and this permission notice appear in supporting | |
27 | documentation, and that the name of GTCO-CalComp not be used in advertising | |
28 | or publicity pertaining to distribution of the software without specific, | |
29 | written prior permission. GTCO-CalComp makes no representations about the | |
30 | suitability of this software for any purpose. It is provided "as is" | |
31 | without express or implied warranty. | |
32 | ||
33 | GTCO-CALCOMP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
34 | INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
35 | EVENT SHALL GTCO-CALCOMP BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
36 | CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
37 | DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
38 | TORTIOUS ACTIONS, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
39 | PERFORMANCE OF THIS SOFTWARE. | |
40 | ||
41 | GTCO CalComp, Inc. | |
42 | 7125 Riverwood Drive | |
43 | Columbia, MD 21046 | |
44 | ||
45 | Jeremy Roberson jroberson@gtcocalcomp.com | |
46 | Scott Hill shill@gtcocalcomp.com | |
47 | */ | |
48 | ||
49 | ||
50 | ||
51 | /*#define DEBUG*/ | |
52 | ||
53 | #include <linux/kernel.h> | |
54 | #include <linux/module.h> | |
55 | #include <linux/errno.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/input.h> | |
59 | #include <linux/usb.h> | |
60 | #include <asm/uaccess.h> | |
61 | #include <asm/unaligned.h> | |
62 | #include <asm/byteorder.h> | |
63 | ||
64 | ||
a19ceb56 JR |
65 | #include <linux/usb/input.h> |
66 | ||
67 | /* Version with a Major number of 2 is for kernel inclusion only. */ | |
68 | #define GTCO_VERSION "2.00.0006" | |
69 | ||
70 | ||
71 | /* MACROS */ | |
72 | ||
73 | #define VENDOR_ID_GTCO 0x078C | |
74 | #define PID_400 0x400 | |
75 | #define PID_401 0x401 | |
76 | #define PID_1000 0x1000 | |
77 | #define PID_1001 0x1001 | |
78 | #define PID_1002 0x1002 | |
79 | ||
80 | /* Max size of a single report */ | |
81 | #define REPORT_MAX_SIZE 10 | |
82 | ||
83 | ||
84 | /* Bitmask whether pen is in range */ | |
85 | #define MASK_INRANGE 0x20 | |
86 | #define MASK_BUTTON 0x01F | |
87 | ||
88 | #define PATHLENGTH 64 | |
89 | ||
90 | /* DATA STRUCTURES */ | |
91 | ||
92 | /* Device table */ | |
9cb3ce52 | 93 | static const struct usb_device_id gtco_usbid_table[] = { |
a19ceb56 JR |
94 | { USB_DEVICE(VENDOR_ID_GTCO, PID_400) }, |
95 | { USB_DEVICE(VENDOR_ID_GTCO, PID_401) }, | |
96 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1000) }, | |
97 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1001) }, | |
98 | { USB_DEVICE(VENDOR_ID_GTCO, PID_1002) }, | |
99 | { } | |
100 | }; | |
101 | MODULE_DEVICE_TABLE (usb, gtco_usbid_table); | |
102 | ||
103 | ||
104 | /* Structure to hold all of our device specific stuff */ | |
105 | struct gtco { | |
106 | ||
107 | struct input_dev *inputdevice; /* input device struct pointer */ | |
108 | struct usb_device *usbdev; /* the usb device for this device */ | |
27c2597d | 109 | struct usb_interface *intf; /* the usb interface for this device */ |
a19ceb56 JR |
110 | struct urb *urbinfo; /* urb for incoming reports */ |
111 | dma_addr_t buf_dma; /* dma addr of the data buffer*/ | |
112 | unsigned char * buffer; /* databuffer for reports */ | |
113 | ||
114 | char usbpath[PATHLENGTH]; | |
115 | int openCount; | |
116 | ||
117 | /* Information pulled from Report Descriptor */ | |
118 | u32 usage; | |
119 | u32 min_X; | |
120 | u32 max_X; | |
121 | u32 min_Y; | |
122 | u32 max_Y; | |
123 | s8 mintilt_X; | |
124 | s8 maxtilt_X; | |
125 | s8 mintilt_Y; | |
126 | s8 maxtilt_Y; | |
127 | u32 maxpressure; | |
128 | u32 minpressure; | |
129 | }; | |
130 | ||
131 | ||
132 | ||
133 | /* Code for parsing the HID REPORT DESCRIPTOR */ | |
134 | ||
135 | /* From HID1.11 spec */ | |
136 | struct hid_descriptor | |
137 | { | |
138 | struct usb_descriptor_header header; | |
139 | __le16 bcdHID; | |
140 | u8 bCountryCode; | |
141 | u8 bNumDescriptors; | |
142 | u8 bDescriptorType; | |
143 | __le16 wDescriptorLength; | |
144 | } __attribute__ ((packed)); | |
145 | ||
146 | ||
147 | #define HID_DESCRIPTOR_SIZE 9 | |
148 | #define HID_DEVICE_TYPE 33 | |
149 | #define REPORT_DEVICE_TYPE 34 | |
150 | ||
151 | ||
152 | #define PREF_TAG(x) ((x)>>4) | |
153 | #define PREF_TYPE(x) ((x>>2)&0x03) | |
154 | #define PREF_SIZE(x) ((x)&0x03) | |
155 | ||
156 | #define TYPE_MAIN 0 | |
157 | #define TYPE_GLOBAL 1 | |
158 | #define TYPE_LOCAL 2 | |
159 | #define TYPE_RESERVED 3 | |
160 | ||
161 | #define TAG_MAIN_INPUT 0x8 | |
162 | #define TAG_MAIN_OUTPUT 0x9 | |
163 | #define TAG_MAIN_FEATURE 0xB | |
164 | #define TAG_MAIN_COL_START 0xA | |
165 | #define TAG_MAIN_COL_END 0xC | |
166 | ||
167 | #define TAG_GLOB_USAGE 0 | |
168 | #define TAG_GLOB_LOG_MIN 1 | |
169 | #define TAG_GLOB_LOG_MAX 2 | |
170 | #define TAG_GLOB_PHYS_MIN 3 | |
171 | #define TAG_GLOB_PHYS_MAX 4 | |
172 | #define TAG_GLOB_UNIT_EXP 5 | |
173 | #define TAG_GLOB_UNIT 6 | |
174 | #define TAG_GLOB_REPORT_SZ 7 | |
175 | #define TAG_GLOB_REPORT_ID 8 | |
176 | #define TAG_GLOB_REPORT_CNT 9 | |
177 | #define TAG_GLOB_PUSH 10 | |
178 | #define TAG_GLOB_POP 11 | |
179 | ||
180 | #define TAG_GLOB_MAX 12 | |
181 | ||
182 | #define DIGITIZER_USAGE_TIP_PRESSURE 0x30 | |
183 | #define DIGITIZER_USAGE_TILT_X 0x3D | |
184 | #define DIGITIZER_USAGE_TILT_Y 0x3E | |
185 | ||
186 | ||
187 | /* | |
a19ceb56 JR |
188 | * This is an abbreviated parser for the HID Report Descriptor. We |
189 | * know what devices we are talking to, so this is by no means meant | |
190 | * to be generic. We can make some safe assumptions: | |
191 | * | |
192 | * - We know there are no LONG tags, all short | |
193 | * - We know that we have no MAIN Feature and MAIN Output items | |
194 | * - We know what the IRQ reports are supposed to look like. | |
195 | * | |
196 | * The main purpose of this is to use the HID report desc to figure | |
197 | * out the mins and maxs of the fields in the IRQ reports. The IRQ | |
198 | * reports for 400/401 change slightly if the max X is bigger than 64K. | |
199 | * | |
200 | */ | |
201 | static void parse_hid_report_descriptor(struct gtco *device, char * report, | |
202 | int length) | |
203 | { | |
27c2597d | 204 | struct device *ddev = &device->intf->dev; |
1b726a02 | 205 | int x, i = 0; |
a19ceb56 JR |
206 | |
207 | /* Tag primitive vars */ | |
208 | __u8 prefix; | |
209 | __u8 size; | |
210 | __u8 tag; | |
211 | __u8 type; | |
212 | __u8 data = 0; | |
213 | __u16 data16 = 0; | |
214 | __u32 data32 = 0; | |
215 | ||
a19ceb56 JR |
216 | /* For parsing logic */ |
217 | int inputnum = 0; | |
218 | __u32 usage = 0; | |
219 | ||
220 | /* Global Values, indexed by TAG */ | |
221 | __u32 globalval[TAG_GLOB_MAX]; | |
222 | __u32 oldval[TAG_GLOB_MAX]; | |
223 | ||
224 | /* Debug stuff */ | |
bc95f366 | 225 | char maintype = 'x'; |
a19ceb56 | 226 | char globtype[12]; |
1b726a02 DT |
227 | int indent = 0; |
228 | char indentstr[10] = ""; | |
a19ceb56 JR |
229 | |
230 | ||
c6f880a7 | 231 | dev_dbg(ddev, "======>>>>>>PARSE<<<<<<======\n"); |
a19ceb56 JR |
232 | |
233 | /* Walk this report and pull out the info we need */ | |
1b726a02 DT |
234 | while (i < length) { |
235 | prefix = report[i]; | |
a19ceb56 JR |
236 | |
237 | /* Skip over prefix */ | |
238 | i++; | |
239 | ||
240 | /* Determine data size and save the data in the proper variable */ | |
241 | size = PREF_SIZE(prefix); | |
1b726a02 | 242 | switch (size) { |
a19ceb56 JR |
243 | case 1: |
244 | data = report[i]; | |
245 | break; | |
246 | case 2: | |
858ad08c | 247 | data16 = get_unaligned_le16(&report[i]); |
a19ceb56 JR |
248 | break; |
249 | case 3: | |
250 | size = 4; | |
858ad08c | 251 | data32 = get_unaligned_le32(&report[i]); |
1b726a02 | 252 | break; |
a19ceb56 JR |
253 | } |
254 | ||
255 | /* Skip size of data */ | |
1b726a02 | 256 | i += size; |
a19ceb56 JR |
257 | |
258 | /* What we do depends on the tag type */ | |
259 | tag = PREF_TAG(prefix); | |
260 | type = PREF_TYPE(prefix); | |
1b726a02 | 261 | switch (type) { |
a19ceb56 | 262 | case TYPE_MAIN: |
1b726a02 DT |
263 | strcpy(globtype, ""); |
264 | switch (tag) { | |
a19ceb56 JR |
265 | |
266 | case TAG_MAIN_INPUT: | |
267 | /* | |
268 | * The INPUT MAIN tag signifies this is | |
269 | * information from a report. We need to | |
270 | * figure out what it is and store the | |
271 | * min/max values | |
272 | */ | |
273 | ||
1b726a02 DT |
274 | maintype = 'I'; |
275 | if (data == 2) | |
276 | strcpy(globtype, "Variable"); | |
277 | else if (data == 3) | |
278 | strcpy(globtype, "Var|Const"); | |
a19ceb56 | 279 | |
c6f880a7 GKH |
280 | dev_dbg(ddev, "::::: Saving Report: %d input #%d Max: 0x%X(%d) Min:0x%X(%d) of %d bits\n", |
281 | globalval[TAG_GLOB_REPORT_ID], inputnum, | |
282 | globalval[TAG_GLOB_LOG_MAX], globalval[TAG_GLOB_LOG_MAX], | |
283 | globalval[TAG_GLOB_LOG_MIN], globalval[TAG_GLOB_LOG_MIN], | |
284 | globalval[TAG_GLOB_REPORT_SZ] * globalval[TAG_GLOB_REPORT_CNT]); | |
a19ceb56 JR |
285 | |
286 | ||
287 | /* | |
288 | We can assume that the first two input items | |
289 | are always the X and Y coordinates. After | |
290 | that, we look for everything else by | |
291 | local usage value | |
292 | */ | |
1b726a02 | 293 | switch (inputnum) { |
a19ceb56 | 294 | case 0: /* X coord */ |
c6f880a7 | 295 | dev_dbg(ddev, "GER: X Usage: 0x%x\n", usage); |
1b726a02 | 296 | if (device->max_X == 0) { |
a19ceb56 JR |
297 | device->max_X = globalval[TAG_GLOB_LOG_MAX]; |
298 | device->min_X = globalval[TAG_GLOB_LOG_MIN]; | |
299 | } | |
a19ceb56 | 300 | break; |
1b726a02 | 301 | |
a19ceb56 | 302 | case 1: /* Y coord */ |
c6f880a7 | 303 | dev_dbg(ddev, "GER: Y Usage: 0x%x\n", usage); |
1b726a02 | 304 | if (device->max_Y == 0) { |
a19ceb56 JR |
305 | device->max_Y = globalval[TAG_GLOB_LOG_MAX]; |
306 | device->min_Y = globalval[TAG_GLOB_LOG_MIN]; | |
307 | } | |
308 | break; | |
1b726a02 | 309 | |
a19ceb56 JR |
310 | default: |
311 | /* Tilt X */ | |
1b726a02 DT |
312 | if (usage == DIGITIZER_USAGE_TILT_X) { |
313 | if (device->maxtilt_X == 0) { | |
a19ceb56 JR |
314 | device->maxtilt_X = globalval[TAG_GLOB_LOG_MAX]; |
315 | device->mintilt_X = globalval[TAG_GLOB_LOG_MIN]; | |
316 | } | |
317 | } | |
318 | ||
319 | /* Tilt Y */ | |
1b726a02 DT |
320 | if (usage == DIGITIZER_USAGE_TILT_Y) { |
321 | if (device->maxtilt_Y == 0) { | |
a19ceb56 JR |
322 | device->maxtilt_Y = globalval[TAG_GLOB_LOG_MAX]; |
323 | device->mintilt_Y = globalval[TAG_GLOB_LOG_MIN]; | |
324 | } | |
325 | } | |
326 | ||
a19ceb56 | 327 | /* Pressure */ |
1b726a02 DT |
328 | if (usage == DIGITIZER_USAGE_TIP_PRESSURE) { |
329 | if (device->maxpressure == 0) { | |
a19ceb56 JR |
330 | device->maxpressure = globalval[TAG_GLOB_LOG_MAX]; |
331 | device->minpressure = globalval[TAG_GLOB_LOG_MIN]; | |
332 | } | |
333 | } | |
334 | ||
335 | break; | |
336 | } | |
337 | ||
338 | inputnum++; | |
a19ceb56 | 339 | break; |
1b726a02 | 340 | |
a19ceb56 | 341 | case TAG_MAIN_OUTPUT: |
1b726a02 | 342 | maintype = 'O'; |
a19ceb56 | 343 | break; |
1b726a02 | 344 | |
a19ceb56 | 345 | case TAG_MAIN_FEATURE: |
1b726a02 | 346 | maintype = 'F'; |
a19ceb56 | 347 | break; |
1b726a02 | 348 | |
a19ceb56 | 349 | case TAG_MAIN_COL_START: |
1b726a02 | 350 | maintype = 'S'; |
a19ceb56 | 351 | |
1b726a02 | 352 | if (data == 0) { |
c6f880a7 | 353 | dev_dbg(ddev, "======>>>>>> Physical\n"); |
1b726a02 DT |
354 | strcpy(globtype, "Physical"); |
355 | } else | |
c6f880a7 | 356 | dev_dbg(ddev, "======>>>>>>\n"); |
a19ceb56 JR |
357 | |
358 | /* Indent the debug output */ | |
359 | indent++; | |
1b726a02 DT |
360 | for (x = 0; x < indent; x++) |
361 | indentstr[x] = '-'; | |
362 | indentstr[x] = 0; | |
a19ceb56 JR |
363 | |
364 | /* Save global tags */ | |
1b726a02 | 365 | for (x = 0; x < TAG_GLOB_MAX; x++) |
a19ceb56 | 366 | oldval[x] = globalval[x]; |
a19ceb56 JR |
367 | |
368 | break; | |
1b726a02 | 369 | |
a19ceb56 | 370 | case TAG_MAIN_COL_END: |
c6f880a7 | 371 | dev_dbg(ddev, "<<<<<<======\n"); |
1b726a02 | 372 | maintype = 'E'; |
a19ceb56 | 373 | indent--; |
1b726a02 DT |
374 | for (x = 0; x < indent; x++) |
375 | indentstr[x] = '-'; | |
376 | indentstr[x] = 0; | |
a19ceb56 JR |
377 | |
378 | /* Copy global tags back */ | |
1b726a02 | 379 | for (x = 0; x < TAG_GLOB_MAX; x++) |
a19ceb56 | 380 | globalval[x] = oldval[x]; |
a19ceb56 JR |
381 | |
382 | break; | |
383 | } | |
384 | ||
1b726a02 | 385 | switch (size) { |
a19ceb56 | 386 | case 1: |
c6f880a7 GKH |
387 | dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n", |
388 | indentstr, tag, maintype, size, globtype, data); | |
a19ceb56 | 389 | break; |
1b726a02 | 390 | |
a19ceb56 | 391 | case 2: |
c6f880a7 GKH |
392 | dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n", |
393 | indentstr, tag, maintype, size, globtype, data16); | |
a19ceb56 | 394 | break; |
1b726a02 | 395 | |
a19ceb56 | 396 | case 4: |
c6f880a7 GKH |
397 | dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n", |
398 | indentstr, tag, maintype, size, globtype, data32); | |
a19ceb56 JR |
399 | break; |
400 | } | |
401 | break; | |
1b726a02 | 402 | |
a19ceb56 | 403 | case TYPE_GLOBAL: |
1b726a02 | 404 | switch (tag) { |
a19ceb56 JR |
405 | case TAG_GLOB_USAGE: |
406 | /* | |
407 | * First time we hit the global usage tag, | |
408 | * it should tell us the type of device | |
409 | */ | |
1b726a02 | 410 | if (device->usage == 0) |
a19ceb56 | 411 | device->usage = data; |
1b726a02 DT |
412 | |
413 | strcpy(globtype, "USAGE"); | |
a19ceb56 | 414 | break; |
1b726a02 DT |
415 | |
416 | case TAG_GLOB_LOG_MIN: | |
417 | strcpy(globtype, "LOG_MIN"); | |
a19ceb56 | 418 | break; |
1b726a02 DT |
419 | |
420 | case TAG_GLOB_LOG_MAX: | |
421 | strcpy(globtype, "LOG_MAX"); | |
a19ceb56 | 422 | break; |
1b726a02 DT |
423 | |
424 | case TAG_GLOB_PHYS_MIN: | |
425 | strcpy(globtype, "PHYS_MIN"); | |
a19ceb56 | 426 | break; |
1b726a02 DT |
427 | |
428 | case TAG_GLOB_PHYS_MAX: | |
429 | strcpy(globtype, "PHYS_MAX"); | |
a19ceb56 | 430 | break; |
1b726a02 DT |
431 | |
432 | case TAG_GLOB_UNIT_EXP: | |
433 | strcpy(globtype, "EXP"); | |
a19ceb56 | 434 | break; |
1b726a02 DT |
435 | |
436 | case TAG_GLOB_UNIT: | |
437 | strcpy(globtype, "UNIT"); | |
a19ceb56 | 438 | break; |
1b726a02 DT |
439 | |
440 | case TAG_GLOB_REPORT_SZ: | |
441 | strcpy(globtype, "REPORT_SZ"); | |
a19ceb56 | 442 | break; |
1b726a02 DT |
443 | |
444 | case TAG_GLOB_REPORT_ID: | |
445 | strcpy(globtype, "REPORT_ID"); | |
a19ceb56 | 446 | /* New report, restart numbering */ |
1b726a02 | 447 | inputnum = 0; |
a19ceb56 | 448 | break; |
1b726a02 | 449 | |
a19ceb56 | 450 | case TAG_GLOB_REPORT_CNT: |
1b726a02 | 451 | strcpy(globtype, "REPORT_CNT"); |
a19ceb56 | 452 | break; |
1b726a02 DT |
453 | |
454 | case TAG_GLOB_PUSH: | |
455 | strcpy(globtype, "PUSH"); | |
a19ceb56 | 456 | break; |
1b726a02 | 457 | |
a19ceb56 | 458 | case TAG_GLOB_POP: |
1b726a02 | 459 | strcpy(globtype, "POP"); |
a19ceb56 JR |
460 | break; |
461 | } | |
462 | ||
a19ceb56 JR |
463 | /* Check to make sure we have a good tag number |
464 | so we don't overflow array */ | |
1b726a02 DT |
465 | if (tag < TAG_GLOB_MAX) { |
466 | switch (size) { | |
a19ceb56 | 467 | case 1: |
c6f880a7 GKH |
468 | dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n", |
469 | indentstr, globtype, tag, size, data); | |
1b726a02 | 470 | globalval[tag] = data; |
a19ceb56 | 471 | break; |
1b726a02 | 472 | |
a19ceb56 | 473 | case 2: |
c6f880a7 GKH |
474 | dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n", |
475 | indentstr, globtype, tag, size, data16); | |
1b726a02 | 476 | globalval[tag] = data16; |
a19ceb56 | 477 | break; |
1b726a02 | 478 | |
a19ceb56 | 479 | case 4: |
c6f880a7 GKH |
480 | dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n", |
481 | indentstr, globtype, tag, size, data32); | |
1b726a02 | 482 | globalval[tag] = data32; |
a19ceb56 JR |
483 | break; |
484 | } | |
1b726a02 | 485 | } else { |
c6f880a7 GKH |
486 | dev_dbg(ddev, "%sGLOBALTAG: ILLEGAL TAG:%d SIZE: %d\n", |
487 | indentstr, tag, size); | |
a19ceb56 | 488 | } |
a19ceb56 JR |
489 | break; |
490 | ||
491 | case TYPE_LOCAL: | |
1b726a02 | 492 | switch (tag) { |
a19ceb56 | 493 | case TAG_GLOB_USAGE: |
1b726a02 | 494 | strcpy(globtype, "USAGE"); |
a19ceb56 JR |
495 | /* Always 1 byte */ |
496 | usage = data; | |
497 | break; | |
1b726a02 DT |
498 | |
499 | case TAG_GLOB_LOG_MIN: | |
500 | strcpy(globtype, "MIN"); | |
a19ceb56 | 501 | break; |
1b726a02 DT |
502 | |
503 | case TAG_GLOB_LOG_MAX: | |
504 | strcpy(globtype, "MAX"); | |
a19ceb56 | 505 | break; |
1b726a02 | 506 | |
a19ceb56 | 507 | default: |
1b726a02 DT |
508 | strcpy(globtype, "UNKNOWN"); |
509 | break; | |
a19ceb56 JR |
510 | } |
511 | ||
1b726a02 | 512 | switch (size) { |
a19ceb56 | 513 | case 1: |
c6f880a7 GKH |
514 | dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n", |
515 | indentstr, tag, globtype, size, data); | |
a19ceb56 | 516 | break; |
1b726a02 | 517 | |
a19ceb56 | 518 | case 2: |
c6f880a7 GKH |
519 | dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n", |
520 | indentstr, tag, globtype, size, data16); | |
a19ceb56 | 521 | break; |
1b726a02 | 522 | |
a19ceb56 | 523 | case 4: |
c6f880a7 GKH |
524 | dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n", |
525 | indentstr, tag, globtype, size, data32); | |
a19ceb56 JR |
526 | break; |
527 | } | |
528 | ||
529 | break; | |
530 | } | |
a19ceb56 | 531 | } |
a19ceb56 JR |
532 | } |
533 | ||
a19ceb56 JR |
534 | /* INPUT DRIVER Routines */ |
535 | ||
a19ceb56 | 536 | /* |
1b726a02 DT |
537 | * Called when opening the input device. This will submit the URB to |
538 | * the usb system so we start getting reports | |
a19ceb56 JR |
539 | */ |
540 | static int gtco_input_open(struct input_dev *inputdev) | |
541 | { | |
7791bdae | 542 | struct gtco *device = input_get_drvdata(inputdev); |
a19ceb56 JR |
543 | |
544 | device->urbinfo->dev = device->usbdev; | |
1b726a02 | 545 | if (usb_submit_urb(device->urbinfo, GFP_KERNEL)) |
a19ceb56 | 546 | return -EIO; |
1b726a02 | 547 | |
a19ceb56 JR |
548 | return 0; |
549 | } | |
550 | ||
1b726a02 DT |
551 | /* |
552 | * Called when closing the input device. This will unlink the URB | |
553 | */ | |
a19ceb56 JR |
554 | static void gtco_input_close(struct input_dev *inputdev) |
555 | { | |
7791bdae | 556 | struct gtco *device = input_get_drvdata(inputdev); |
a19ceb56 JR |
557 | |
558 | usb_kill_urb(device->urbinfo); | |
a19ceb56 JR |
559 | } |
560 | ||
561 | ||
562 | /* | |
563 | * Setup input device capabilities. Tell the input system what this | |
564 | * device is capable of generating. | |
565 | * | |
566 | * This information is based on what is read from the HID report and | |
567 | * placed in the struct gtco structure | |
568 | * | |
569 | */ | |
7791bdae | 570 | static void gtco_setup_caps(struct input_dev *inputdev) |
a19ceb56 | 571 | { |
7791bdae | 572 | struct gtco *device = input_get_drvdata(inputdev); |
a19ceb56 | 573 | |
a19ceb56 | 574 | /* Which events */ |
7b19ada2 JS |
575 | inputdev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) | |
576 | BIT_MASK(EV_MSC); | |
a19ceb56 | 577 | |
a19ceb56 | 578 | /* Misc event menu block */ |
7b19ada2 JS |
579 | inputdev->mscbit[0] = BIT_MASK(MSC_SCAN) | BIT_MASK(MSC_SERIAL) | |
580 | BIT_MASK(MSC_RAW); | |
a19ceb56 | 581 | |
a19ceb56 JR |
582 | /* Absolute values based on HID report info */ |
583 | input_set_abs_params(inputdev, ABS_X, device->min_X, device->max_X, | |
584 | 0, 0); | |
585 | input_set_abs_params(inputdev, ABS_Y, device->min_Y, device->max_Y, | |
586 | 0, 0); | |
587 | ||
588 | /* Proximity */ | |
589 | input_set_abs_params(inputdev, ABS_DISTANCE, 0, 1, 0, 0); | |
590 | ||
591 | /* Tilt & pressure */ | |
592 | input_set_abs_params(inputdev, ABS_TILT_X, device->mintilt_X, | |
593 | device->maxtilt_X, 0, 0); | |
594 | input_set_abs_params(inputdev, ABS_TILT_Y, device->mintilt_Y, | |
595 | device->maxtilt_Y, 0, 0); | |
596 | input_set_abs_params(inputdev, ABS_PRESSURE, device->minpressure, | |
597 | device->maxpressure, 0, 0); | |
598 | ||
a19ceb56 | 599 | /* Transducer */ |
1b726a02 | 600 | input_set_abs_params(inputdev, ABS_MISC, 0, 0xFF, 0, 0); |
a19ceb56 JR |
601 | } |
602 | ||
a19ceb56 JR |
603 | /* USB Routines */ |
604 | ||
a19ceb56 JR |
605 | /* |
606 | * URB callback routine. Called when we get IRQ reports from the | |
607 | * digitizer. | |
608 | * | |
609 | * This bridges the USB and input device worlds. It generates events | |
610 | * on the input device based on the USB reports. | |
611 | */ | |
612 | static void gtco_urb_callback(struct urb *urbinfo) | |
613 | { | |
1b726a02 | 614 | struct gtco *device = urbinfo->context; |
a19ceb56 JR |
615 | struct input_dev *inputdev; |
616 | int rc; | |
617 | u32 val = 0; | |
618 | s8 valsigned = 0; | |
619 | char le_buffer[2]; | |
620 | ||
621 | inputdev = device->inputdevice; | |
622 | ||
a19ceb56 | 623 | /* Was callback OK? */ |
1b726a02 DT |
624 | if (urbinfo->status == -ECONNRESET || |
625 | urbinfo->status == -ENOENT || | |
626 | urbinfo->status == -ESHUTDOWN) { | |
a19ceb56 JR |
627 | |
628 | /* Shutdown is occurring. Return and don't queue up any more */ | |
629 | return; | |
630 | } | |
631 | ||
1b726a02 DT |
632 | if (urbinfo->status != 0) { |
633 | /* | |
634 | * Some unknown error. Hopefully temporary. Just go and | |
635 | * requeue an URB | |
636 | */ | |
a19ceb56 JR |
637 | goto resubmit; |
638 | } | |
639 | ||
640 | /* | |
641 | * Good URB, now process | |
642 | */ | |
643 | ||
644 | /* PID dependent when we interpret the report */ | |
1b726a02 DT |
645 | if (inputdev->id.product == PID_1000 || |
646 | inputdev->id.product == PID_1001 || | |
647 | inputdev->id.product == PID_1002) { | |
a19ceb56 JR |
648 | |
649 | /* | |
650 | * Switch on the report ID | |
651 | * Conveniently, the reports have more information, the higher | |
652 | * the report number. We can just fall through the case | |
653 | * statements if we start with the highest number report | |
654 | */ | |
1b726a02 | 655 | switch (device->buffer[0]) { |
a19ceb56 JR |
656 | case 5: |
657 | /* Pressure is 9 bits */ | |
1b726a02 | 658 | val = ((u16)(device->buffer[8]) << 1); |
a19ceb56 JR |
659 | val |= (u16)(device->buffer[7] >> 7); |
660 | input_report_abs(inputdev, ABS_PRESSURE, | |
661 | device->buffer[8]); | |
662 | ||
663 | /* Mask out the Y tilt value used for pressure */ | |
664 | device->buffer[7] = (u8)((device->buffer[7]) & 0x7F); | |
665 | ||
a19ceb56 JR |
666 | /* Fall thru */ |
667 | case 4: | |
668 | /* Tilt */ | |
669 | ||
670 | /* Sign extend these 7 bit numbers. */ | |
671 | if (device->buffer[6] & 0x40) | |
672 | device->buffer[6] |= 0x80; | |
673 | ||
674 | if (device->buffer[7] & 0x40) | |
675 | device->buffer[7] |= 0x80; | |
676 | ||
677 | ||
678 | valsigned = (device->buffer[6]); | |
679 | input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned); | |
680 | ||
681 | valsigned = (device->buffer[7]); | |
682 | input_report_abs(inputdev, ABS_TILT_Y, (s32)valsigned); | |
683 | ||
684 | /* Fall thru */ | |
a19ceb56 JR |
685 | case 2: |
686 | case 3: | |
687 | /* Convert buttons, only 5 bits possible */ | |
1b726a02 | 688 | val = (device->buffer[5]) & MASK_BUTTON; |
a19ceb56 JR |
689 | |
690 | /* We don't apply any meaning to the bitmask, | |
691 | just report */ | |
692 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
693 | ||
694 | /* Fall thru */ | |
695 | case 1: | |
a19ceb56 | 696 | /* All reports have X and Y coords in the same place */ |
858ad08c | 697 | val = get_unaligned_le16(&device->buffer[1]); |
a19ceb56 JR |
698 | input_report_abs(inputdev, ABS_X, val); |
699 | ||
858ad08c | 700 | val = get_unaligned_le16(&device->buffer[3]); |
a19ceb56 JR |
701 | input_report_abs(inputdev, ABS_Y, val); |
702 | ||
a19ceb56 | 703 | /* Ditto for proximity bit */ |
1b726a02 | 704 | val = device->buffer[5] & MASK_INRANGE ? 1 : 0; |
a19ceb56 JR |
705 | input_report_abs(inputdev, ABS_DISTANCE, val); |
706 | ||
a19ceb56 JR |
707 | /* Report 1 is an exception to how we handle buttons */ |
708 | /* Buttons are an index, not a bitmask */ | |
1b726a02 | 709 | if (device->buffer[0] == 1) { |
a19ceb56 | 710 | |
1b726a02 DT |
711 | /* |
712 | * Convert buttons, 5 bit index | |
713 | * Report value of index set as one, | |
714 | * the rest as 0 | |
715 | */ | |
716 | val = device->buffer[5] & MASK_BUTTON; | |
27c2597d | 717 | dev_dbg(&device->intf->dev, |
c6f880a7 GKH |
718 | "======>>>>>>REPORT 1: val 0x%X(%d)\n", |
719 | val, val); | |
a19ceb56 JR |
720 | |
721 | /* | |
722 | * We don't apply any meaning to the button | |
723 | * index, just report it | |
724 | */ | |
725 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
a19ceb56 | 726 | } |
a19ceb56 | 727 | break; |
1b726a02 | 728 | |
a19ceb56 JR |
729 | case 7: |
730 | /* Menu blocks */ | |
731 | input_event(inputdev, EV_MSC, MSC_SCAN, | |
732 | device->buffer[1]); | |
a19ceb56 | 733 | break; |
a19ceb56 | 734 | } |
a19ceb56 | 735 | } |
1b726a02 | 736 | |
a19ceb56 | 737 | /* Other pid class */ |
1b726a02 DT |
738 | if (inputdev->id.product == PID_400 || |
739 | inputdev->id.product == PID_401) { | |
a19ceb56 JR |
740 | |
741 | /* Report 2 */ | |
1b726a02 | 742 | if (device->buffer[0] == 2) { |
a19ceb56 | 743 | /* Menu blocks */ |
1b726a02 | 744 | input_event(inputdev, EV_MSC, MSC_SCAN, device->buffer[1]); |
a19ceb56 JR |
745 | } |
746 | ||
747 | /* Report 1 */ | |
1b726a02 | 748 | if (device->buffer[0] == 1) { |
a19ceb56 JR |
749 | char buttonbyte; |
750 | ||
a19ceb56 | 751 | /* IF X max > 64K, we still a bit from the y report */ |
1b726a02 | 752 | if (device->max_X > 0x10000) { |
a19ceb56 | 753 | |
1b726a02 DT |
754 | val = (u16)(((u16)(device->buffer[2] << 8)) | (u8)device->buffer[1]); |
755 | val |= (u32)(((u8)device->buffer[3] & 0x1) << 16); | |
a19ceb56 JR |
756 | |
757 | input_report_abs(inputdev, ABS_X, val); | |
758 | ||
1b726a02 DT |
759 | le_buffer[0] = (u8)((u8)(device->buffer[3]) >> 1); |
760 | le_buffer[0] |= (u8)((device->buffer[3] & 0x1) << 7); | |
a19ceb56 | 761 | |
1b726a02 DT |
762 | le_buffer[1] = (u8)(device->buffer[4] >> 1); |
763 | le_buffer[1] |= (u8)((device->buffer[5] & 0x1) << 7); | |
a19ceb56 | 764 | |
858ad08c | 765 | val = get_unaligned_le16(le_buffer); |
a19ceb56 JR |
766 | input_report_abs(inputdev, ABS_Y, val); |
767 | ||
a19ceb56 JR |
768 | /* |
769 | * Shift the button byte right by one to | |
770 | * make it look like the standard report | |
771 | */ | |
1b726a02 DT |
772 | buttonbyte = device->buffer[5] >> 1; |
773 | } else { | |
a19ceb56 | 774 | |
858ad08c | 775 | val = get_unaligned_le16(&device->buffer[1]); |
a19ceb56 JR |
776 | input_report_abs(inputdev, ABS_X, val); |
777 | ||
858ad08c | 778 | val = get_unaligned_le16(&device->buffer[3]); |
a19ceb56 JR |
779 | input_report_abs(inputdev, ABS_Y, val); |
780 | ||
781 | buttonbyte = device->buffer[5]; | |
a19ceb56 JR |
782 | } |
783 | ||
a19ceb56 | 784 | /* BUTTONS and PROXIMITY */ |
1b726a02 | 785 | val = buttonbyte & MASK_INRANGE ? 1 : 0; |
a19ceb56 JR |
786 | input_report_abs(inputdev, ABS_DISTANCE, val); |
787 | ||
788 | /* Convert buttons, only 4 bits possible */ | |
1b726a02 | 789 | val = buttonbyte & 0x0F; |
a19ceb56 | 790 | #ifdef USE_BUTTONS |
1b726a02 DT |
791 | for (i = 0; i < 5; i++) |
792 | input_report_key(inputdev, BTN_DIGI + i, val & (1 << i)); | |
a19ceb56 JR |
793 | #else |
794 | /* We don't apply any meaning to the bitmask, just report */ | |
795 | input_event(inputdev, EV_MSC, MSC_SERIAL, val); | |
796 | #endif | |
1b726a02 | 797 | |
a19ceb56 JR |
798 | /* TRANSDUCER */ |
799 | input_report_abs(inputdev, ABS_MISC, device->buffer[6]); | |
a19ceb56 JR |
800 | } |
801 | } | |
802 | ||
803 | /* Everybody gets report ID's */ | |
804 | input_event(inputdev, EV_MSC, MSC_RAW, device->buffer[0]); | |
805 | ||
806 | /* Sync it up */ | |
807 | input_sync(inputdev); | |
808 | ||
809 | resubmit: | |
810 | rc = usb_submit_urb(urbinfo, GFP_ATOMIC); | |
1b726a02 | 811 | if (rc != 0) |
27c2597d | 812 | dev_err(&device->intf->dev, |
3bd9597a | 813 | "usb_submit_urb failed rc=0x%x\n", rc); |
a19ceb56 JR |
814 | } |
815 | ||
816 | /* | |
817 | * The probe routine. This is called when the kernel find the matching USB | |
818 | * vendor/product. We do the following: | |
819 | * | |
820 | * - Allocate mem for a local structure to manage the device | |
821 | * - Request a HID Report Descriptor from the device and parse it to | |
822 | * find out the device parameters | |
823 | * - Create an input device and assign it attributes | |
824 | * - Allocate an URB so the device can talk to us when the input | |
825 | * queue is open | |
826 | */ | |
827 | static int gtco_probe(struct usb_interface *usbinterface, | |
828 | const struct usb_device_id *id) | |
829 | { | |
830 | ||
1b726a02 DT |
831 | struct gtco *gtco; |
832 | struct input_dev *input_dev; | |
a19ceb56 | 833 | struct hid_descriptor *hid_desc; |
501a5250 | 834 | char *report; |
1b726a02 DT |
835 | int result = 0, retry; |
836 | int error; | |
a19ceb56 JR |
837 | struct usb_endpoint_descriptor *endpoint; |
838 | ||
839 | /* Allocate memory for device structure */ | |
1b726a02 DT |
840 | gtco = kzalloc(sizeof(struct gtco), GFP_KERNEL); |
841 | input_dev = input_allocate_device(); | |
842 | if (!gtco || !input_dev) { | |
3bd9597a | 843 | dev_err(&usbinterface->dev, "No more memory\n"); |
1b726a02 DT |
844 | error = -ENOMEM; |
845 | goto err_free_devs; | |
a19ceb56 JR |
846 | } |
847 | ||
1b726a02 DT |
848 | /* Set pointer to the input device */ |
849 | gtco->inputdevice = input_dev; | |
a19ceb56 JR |
850 | |
851 | /* Save interface information */ | |
1b726a02 | 852 | gtco->usbdev = usb_get_dev(interface_to_usbdev(usbinterface)); |
27c2597d | 853 | gtco->intf = usbinterface; |
a19ceb56 JR |
854 | |
855 | /* Allocate some data for incoming reports */ | |
997ea58e DM |
856 | gtco->buffer = usb_alloc_coherent(gtco->usbdev, REPORT_MAX_SIZE, |
857 | GFP_KERNEL, >co->buf_dma); | |
1b726a02 | 858 | if (!gtco->buffer) { |
3bd9597a | 859 | dev_err(&usbinterface->dev, "No more memory for us buffers\n"); |
1b726a02 DT |
860 | error = -ENOMEM; |
861 | goto err_free_devs; | |
a19ceb56 JR |
862 | } |
863 | ||
864 | /* Allocate URB for reports */ | |
1b726a02 DT |
865 | gtco->urbinfo = usb_alloc_urb(0, GFP_KERNEL); |
866 | if (!gtco->urbinfo) { | |
3bd9597a | 867 | dev_err(&usbinterface->dev, "Failed to allocate URB\n"); |
f4bc95d7 | 868 | error = -ENOMEM; |
1b726a02 | 869 | goto err_free_buf; |
a19ceb56 JR |
870 | } |
871 | ||
adaad9d8 VD |
872 | /* Sanity check that a device has an endpoint */ |
873 | if (usbinterface->altsetting[0].desc.bNumEndpoints < 1) { | |
874 | dev_err(&usbinterface->dev, | |
875 | "Invalid number of endpoints\n"); | |
876 | error = -EINVAL; | |
877 | goto err_free_urb; | |
878 | } | |
879 | ||
a19ceb56 JR |
880 | /* |
881 | * The endpoint is always altsetting 0, we know this since we know | |
882 | * this device only has one interrupt endpoint | |
883 | */ | |
884 | endpoint = &usbinterface->altsetting[0].endpoint[0].desc; | |
885 | ||
886 | /* Some debug */ | |
c6f880a7 GKH |
887 | dev_dbg(&usbinterface->dev, "gtco # interfaces: %d\n", usbinterface->num_altsetting); |
888 | dev_dbg(&usbinterface->dev, "num endpoints: %d\n", usbinterface->cur_altsetting->desc.bNumEndpoints); | |
889 | dev_dbg(&usbinterface->dev, "interface class: %d\n", usbinterface->cur_altsetting->desc.bInterfaceClass); | |
890 | dev_dbg(&usbinterface->dev, "endpoint: attribute:0x%x type:0x%x\n", endpoint->bmAttributes, endpoint->bDescriptorType); | |
e941da31 | 891 | if (usb_endpoint_xfer_int(endpoint)) |
c6f880a7 | 892 | dev_dbg(&usbinterface->dev, "endpoint: we have interrupt endpoint\n"); |
a19ceb56 | 893 | |
c6f880a7 | 894 | dev_dbg(&usbinterface->dev, "endpoint extra len:%d\n", usbinterface->altsetting[0].extralen); |
a19ceb56 JR |
895 | |
896 | /* | |
897 | * Find the HID descriptor so we can find out the size of the | |
898 | * HID report descriptor | |
899 | */ | |
900 | if (usb_get_extra_descriptor(usbinterface->cur_altsetting, | |
adaad9d8 | 901 | HID_DEVICE_TYPE, &hid_desc) != 0) { |
3bd9597a GKH |
902 | dev_err(&usbinterface->dev, |
903 | "Can't retrieve exta USB descriptor to get hid report descriptor length\n"); | |
1b726a02 DT |
904 | error = -EIO; |
905 | goto err_free_urb; | |
a19ceb56 JR |
906 | } |
907 | ||
c6f880a7 GKH |
908 | dev_dbg(&usbinterface->dev, |
909 | "Extra descriptor success: type:%d len:%d\n", | |
910 | hid_desc->bDescriptorType, hid_desc->wDescriptorLength); | |
a19ceb56 | 911 | |
6b8588f7 | 912 | report = kzalloc(le16_to_cpu(hid_desc->wDescriptorLength), GFP_KERNEL); |
1b726a02 | 913 | if (!report) { |
3bd9597a | 914 | dev_err(&usbinterface->dev, "No more memory for report\n"); |
1b726a02 DT |
915 | error = -ENOMEM; |
916 | goto err_free_urb; | |
a19ceb56 JR |
917 | } |
918 | ||
919 | /* Couple of tries to get reply */ | |
1b726a02 DT |
920 | for (retry = 0; retry < 3; retry++) { |
921 | result = usb_control_msg(gtco->usbdev, | |
922 | usb_rcvctrlpipe(gtco->usbdev, 0), | |
a19ceb56 JR |
923 | USB_REQ_GET_DESCRIPTOR, |
924 | USB_RECIP_INTERFACE | USB_DIR_IN, | |
1b726a02 | 925 | REPORT_DEVICE_TYPE << 8, |
a19ceb56 JR |
926 | 0, /* interface */ |
927 | report, | |
6b8588f7 | 928 | le16_to_cpu(hid_desc->wDescriptorLength), |
a19ceb56 JR |
929 | 5000); /* 5 secs */ |
930 | ||
c6f880a7 | 931 | dev_dbg(&usbinterface->dev, "usb_control_msg result: %d\n", result); |
501a5250 DT |
932 | if (result == le16_to_cpu(hid_desc->wDescriptorLength)) { |
933 | parse_hid_report_descriptor(gtco, report, result); | |
a19ceb56 | 934 | break; |
501a5250 | 935 | } |
a19ceb56 JR |
936 | } |
937 | ||
501a5250 DT |
938 | kfree(report); |
939 | ||
a19ceb56 | 940 | /* If we didn't get the report, fail */ |
6b8588f7 | 941 | if (result != le16_to_cpu(hid_desc->wDescriptorLength)) { |
3bd9597a GKH |
942 | dev_err(&usbinterface->dev, |
943 | "Failed to get HID Report Descriptor of size: %d\n", | |
944 | hid_desc->wDescriptorLength); | |
1b726a02 DT |
945 | error = -EIO; |
946 | goto err_free_urb; | |
a19ceb56 JR |
947 | } |
948 | ||
a19ceb56 | 949 | /* Create a device file node */ |
1b726a02 DT |
950 | usb_make_path(gtco->usbdev, gtco->usbpath, sizeof(gtco->usbpath)); |
951 | strlcat(gtco->usbpath, "/input0", sizeof(gtco->usbpath)); | |
a19ceb56 JR |
952 | |
953 | /* Set Input device functions */ | |
1b726a02 DT |
954 | input_dev->open = gtco_input_open; |
955 | input_dev->close = gtco_input_close; | |
a19ceb56 JR |
956 | |
957 | /* Set input device information */ | |
1b726a02 DT |
958 | input_dev->name = "GTCO_CalComp"; |
959 | input_dev->phys = gtco->usbpath; | |
7791bdae DT |
960 | |
961 | input_set_drvdata(input_dev, gtco); | |
a19ceb56 JR |
962 | |
963 | /* Now set up all the input device capabilities */ | |
1b726a02 | 964 | gtco_setup_caps(input_dev); |
a19ceb56 JR |
965 | |
966 | /* Set input device required ID information */ | |
1b726a02 | 967 | usb_to_input_id(gtco->usbdev, &input_dev->id); |
c0f82d57 | 968 | input_dev->dev.parent = &usbinterface->dev; |
a19ceb56 JR |
969 | |
970 | /* Setup the URB, it will be posted later on open of input device */ | |
971 | endpoint = &usbinterface->altsetting[0].endpoint[0].desc; | |
972 | ||
1b726a02 DT |
973 | usb_fill_int_urb(gtco->urbinfo, |
974 | gtco->usbdev, | |
975 | usb_rcvintpipe(gtco->usbdev, | |
a19ceb56 | 976 | endpoint->bEndpointAddress), |
1b726a02 | 977 | gtco->buffer, |
a19ceb56 JR |
978 | REPORT_MAX_SIZE, |
979 | gtco_urb_callback, | |
1b726a02 | 980 | gtco, |
a19ceb56 JR |
981 | endpoint->bInterval); |
982 | ||
1b726a02 DT |
983 | gtco->urbinfo->transfer_dma = gtco->buf_dma; |
984 | gtco->urbinfo->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
a19ceb56 | 985 | |
1b726a02 DT |
986 | /* Save gtco pointer in USB interface gtco */ |
987 | usb_set_intfdata(usbinterface, gtco); | |
a19ceb56 JR |
988 | |
989 | /* All done, now register the input device */ | |
1b726a02 DT |
990 | error = input_register_device(input_dev); |
991 | if (error) | |
992 | goto err_free_urb; | |
a19ceb56 | 993 | |
a19ceb56 JR |
994 | return 0; |
995 | ||
1b726a02 DT |
996 | err_free_urb: |
997 | usb_free_urb(gtco->urbinfo); | |
998 | err_free_buf: | |
997ea58e DM |
999 | usb_free_coherent(gtco->usbdev, REPORT_MAX_SIZE, |
1000 | gtco->buffer, gtco->buf_dma); | |
1b726a02 | 1001 | err_free_devs: |
1b726a02 DT |
1002 | input_free_device(input_dev); |
1003 | kfree(gtco); | |
1004 | return error; | |
a19ceb56 JR |
1005 | } |
1006 | ||
1007 | /* | |
1008 | * This function is a standard USB function called when the USB device | |
1009 | * is disconnected. We will get rid of the URV, de-register the input | |
1010 | * device, and free up allocated memory | |
1011 | */ | |
1012 | static void gtco_disconnect(struct usb_interface *interface) | |
1013 | { | |
a19ceb56 | 1014 | /* Grab private device ptr */ |
1b726a02 | 1015 | struct gtco *gtco = usb_get_intfdata(interface); |
a19ceb56 JR |
1016 | |
1017 | /* Now reverse all the registration stuff */ | |
1b726a02 DT |
1018 | if (gtco) { |
1019 | input_unregister_device(gtco->inputdevice); | |
1020 | usb_kill_urb(gtco->urbinfo); | |
1021 | usb_free_urb(gtco->urbinfo); | |
997ea58e DM |
1022 | usb_free_coherent(gtco->usbdev, REPORT_MAX_SIZE, |
1023 | gtco->buffer, gtco->buf_dma); | |
1b726a02 | 1024 | kfree(gtco); |
a19ceb56 JR |
1025 | } |
1026 | ||
899ef6e7 | 1027 | dev_info(&interface->dev, "gtco driver disconnected\n"); |
a19ceb56 JR |
1028 | } |
1029 | ||
a19ceb56 JR |
1030 | /* STANDARD MODULE LOAD ROUTINES */ |
1031 | ||
1032 | static struct usb_driver gtco_driverinfo_table = { | |
1b726a02 DT |
1033 | .name = "gtco", |
1034 | .id_table = gtco_usbid_table, | |
1035 | .probe = gtco_probe, | |
1036 | .disconnect = gtco_disconnect, | |
a19ceb56 | 1037 | }; |
1b726a02 | 1038 | |
08642e7c | 1039 | module_usb_driver(gtco_driverinfo_table); |
a19ceb56 | 1040 | |
32a676fe | 1041 | MODULE_DESCRIPTION("GTCO digitizer USB driver"); |
a19ceb56 | 1042 | MODULE_LICENSE("GPL"); |