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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / media / video / gspca / se401.c
blobbb70092c2229f3eca85d3795058595a4f981fd9e
1 /*
2 * GSPCA Endpoints (formerly known as AOX) se401 USB Camera sub Driver
3 *
4 * Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com>
5 *
6 * Based on the v4l1 se401 driver which is:
7 *
8 * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28 #define MODULE_NAME "se401"
29
30 #define BULK_SIZE 4096
31 #define PACKET_SIZE 1024
32 #define READ_REQ_SIZE 64
33 #define MAX_MODES ((READ_REQ_SIZE - 6) / 4)
34 /* The se401 compression algorithm uses a fixed quant factor, which
35 can be configured by setting the high nibble of the SE401_OPERATINGMODE
36 feature. This needs to exactly match what is in libv4l! */
37 #define SE401_QUANT_FACT 8
38
39 #include <linux/input.h>
40 #include <linux/slab.h>
41 #include "gspca.h"
42 #include "se401.h"
43
44 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
45 MODULE_DESCRIPTION("Endpoints se401");
46 MODULE_LICENSE("GPL");
47
48 /* controls */
49 enum e_ctrl {
50 BRIGHTNESS,
51 GAIN,
52 EXPOSURE,
53 FREQ,
54 NCTRL /* number of controls */
55 };
56
57 /* exposure change state machine states */
58 enum {
59 EXPO_CHANGED,
60 EXPO_DROP_FRAME,
61 EXPO_NO_CHANGE,
62 };
63
64 /* specific webcam descriptor */
65 struct sd {
66 struct gspca_dev gspca_dev; /* !! must be the first item */
67 struct gspca_ctrl ctrls[NCTRL];
68 struct v4l2_pix_format fmts[MAX_MODES];
69 int pixels_read;
70 int packet_read;
71 u8 packet[PACKET_SIZE];
72 u8 restart_stream;
73 u8 button_state;
74 u8 resetlevel;
75 u8 resetlevel_frame_count;
76 int resetlevel_adjust_dir;
77 int expo_change_state;
78 };
79
80 static void setbrightness(struct gspca_dev *gspca_dev);
81 static void setgain(struct gspca_dev *gspca_dev);
82 static void setexposure(struct gspca_dev *gspca_dev);
83
84 static const struct ctrl sd_ctrls[NCTRL] = {
85 [BRIGHTNESS] = {
86 {
87 .id = V4L2_CID_BRIGHTNESS,
88 .type = V4L2_CTRL_TYPE_INTEGER,
89 .name = "Brightness",
90 .minimum = 0,
91 .maximum = 255,
92 .step = 1,
93 .default_value = 15,
94 },
95 .set_control = setbrightness
96 },
97 [GAIN] = {
98 {
99 .id = V4L2_CID_GAIN,
100 .type = V4L2_CTRL_TYPE_INTEGER,
101 .name = "Gain",
102 .minimum = 0,
103 .maximum = 50, /* Really 63 but > 50 is not pretty */
104 .step = 1,
105 .default_value = 25,
106 },
107 .set_control = setgain
108 },
109 [EXPOSURE] = {
110 {
111 .id = V4L2_CID_EXPOSURE,
112 .type = V4L2_CTRL_TYPE_INTEGER,
113 .name = "Exposure",
114 .minimum = 0,
115 .maximum = 32767,
116 .step = 1,
117 .default_value = 15000,
118 },
119 .set_control = setexposure
120 },
121 [FREQ] = {
122 {
123 .id = V4L2_CID_POWER_LINE_FREQUENCY,
124 .type = V4L2_CTRL_TYPE_MENU,
125 .name = "Light frequency filter",
126 .minimum = 0,
127 .maximum = 2,
128 .step = 1,
129 .default_value = 0,
130 },
131 .set_control = setexposure
132 },
133 };
134
135 static void se401_write_req(struct gspca_dev *gspca_dev, u16 req, u16 value,
136 int silent)
137 {
138 int err;
139
140 if (gspca_dev->usb_err < 0)
141 return;
142
143 err = usb_control_msg(gspca_dev->dev,
144 usb_sndctrlpipe(gspca_dev->dev, 0), req,
145 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
146 value, 0, NULL, 0, 1000);
147 if (err < 0) {
148 if (!silent)
149 pr_err("write req failed req %#04x val %#04x error %d\n",
150 req, value, err);
151 gspca_dev->usb_err = err;
152 }
153 }
154
155 static void se401_read_req(struct gspca_dev *gspca_dev, u16 req, int silent)
156 {
157 int err;
158
159 if (gspca_dev->usb_err < 0)
160 return;
161
162 if (USB_BUF_SZ < READ_REQ_SIZE) {
163 pr_err("USB_BUF_SZ too small!!\n");
164 gspca_dev->usb_err = -ENOBUFS;
165 return;
166 }
167
168 err = usb_control_msg(gspca_dev->dev,
169 usb_rcvctrlpipe(gspca_dev->dev, 0), req,
170 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
171 0, 0, gspca_dev->usb_buf, READ_REQ_SIZE, 1000);
172 if (err < 0) {
173 if (!silent)
174 pr_err("read req failed req %#04x error %d\n",
175 req, err);
176 gspca_dev->usb_err = err;
177 }
178 }
179
180 static void se401_set_feature(struct gspca_dev *gspca_dev,
181 u16 selector, u16 param)
182 {
183 int err;
184
185 if (gspca_dev->usb_err < 0)
186 return;
187
188 err = usb_control_msg(gspca_dev->dev,
189 usb_sndctrlpipe(gspca_dev->dev, 0),
190 SE401_REQ_SET_EXT_FEATURE,
191 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
192 param, selector, NULL, 0, 1000);
193 if (err < 0) {
194 pr_err("set feature failed sel %#04x param %#04x error %d\n",
195 selector, param, err);
196 gspca_dev->usb_err = err;
197 }
198 }
199
200 static int se401_get_feature(struct gspca_dev *gspca_dev, u16 selector)
201 {
202 int err;
203
204 if (gspca_dev->usb_err < 0)
205 return gspca_dev->usb_err;
206
207 if (USB_BUF_SZ < 2) {
208 pr_err("USB_BUF_SZ too small!!\n");
209 gspca_dev->usb_err = -ENOBUFS;
210 return gspca_dev->usb_err;
211 }
212
213 err = usb_control_msg(gspca_dev->dev,
214 usb_rcvctrlpipe(gspca_dev->dev, 0),
215 SE401_REQ_GET_EXT_FEATURE,
216 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
217 0, selector, gspca_dev->usb_buf, 2, 1000);
218 if (err < 0) {
219 pr_err("get feature failed sel %#04x error %d\n",
220 selector, err);
221 gspca_dev->usb_err = err;
222 return err;
223 }
224 return gspca_dev->usb_buf[0] | (gspca_dev->usb_buf[1] << 8);
225 }
226
227 static void setbrightness(struct gspca_dev *gspca_dev)
228 {
229 struct sd *sd = (struct sd *) gspca_dev;
230
231 if (gspca_dev->ctrl_dis & (1 << BRIGHTNESS))
232 return;
233
234 /* HDG: this does not seem to do anything on my cam */
235 se401_write_req(gspca_dev, SE401_REQ_SET_BRT,
236 sd->ctrls[BRIGHTNESS].val, 0);
237 }
238
239 static void setgain(struct gspca_dev *gspca_dev)
240 {
241 struct sd *sd = (struct sd *) gspca_dev;
242 u16 gain = 63 - sd->ctrls[GAIN].val;
243
244 /* red color gain */
245 se401_set_feature(gspca_dev, HV7131_REG_ARCG, gain);
246 /* green color gain */
247 se401_set_feature(gspca_dev, HV7131_REG_AGCG, gain);
248 /* blue color gain */
249 se401_set_feature(gspca_dev, HV7131_REG_ABCG, gain);
250 }
251
252 static void setexposure(struct gspca_dev *gspca_dev)
253 {
254 struct sd *sd = (struct sd *) gspca_dev;
255 int integration = sd->ctrls[EXPOSURE].val << 6;
256 u8 expose_h, expose_m, expose_l;
257
258 /* Do this before the set_feature calls, for proper timing wrt
259 the interrupt driven pkt_scan. Note we may still race but that
260 is not a big issue, the expo change state machine is merely for
261 avoiding underexposed frames getting send out, if one sneaks
262 through so be it */
263 sd->expo_change_state = EXPO_CHANGED;
264
265 if (sd->ctrls[FREQ].val == V4L2_CID_POWER_LINE_FREQUENCY_50HZ)
266 integration = integration - integration % 106667;
267 if (sd->ctrls[FREQ].val == V4L2_CID_POWER_LINE_FREQUENCY_60HZ)
268 integration = integration - integration % 88889;
269
270 expose_h = (integration >> 16);
271 expose_m = (integration >> 8);
272 expose_l = integration;
273
274 /* integration time low */
275 se401_set_feature(gspca_dev, HV7131_REG_TITL, expose_l);
276 /* integration time mid */
277 se401_set_feature(gspca_dev, HV7131_REG_TITM, expose_m);
278 /* integration time high */
279 se401_set_feature(gspca_dev, HV7131_REG_TITU, expose_h);
280 }
281
282 static int sd_config(struct gspca_dev *gspca_dev,
283 const struct usb_device_id *id)
284 {
285 struct sd *sd = (struct sd *)gspca_dev;
286 struct cam *cam = &gspca_dev->cam;
287 u8 *cd = gspca_dev->usb_buf;
288 int i, j, n;
289 int widths[MAX_MODES], heights[MAX_MODES];
290
291 /* Read the camera descriptor */
292 se401_read_req(gspca_dev, SE401_REQ_GET_CAMERA_DESCRIPTOR, 1);
293 if (gspca_dev->usb_err) {
294 /* Sometimes after being idle for a while the se401 won't
295 respond and needs a good kicking */
296 usb_reset_device(gspca_dev->dev);
297 gspca_dev->usb_err = 0;
298 se401_read_req(gspca_dev, SE401_REQ_GET_CAMERA_DESCRIPTOR, 0);
299 }
300
301 /* Some cameras start with their LED on */
302 se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 0, 0);
303 if (gspca_dev->usb_err)
304 return gspca_dev->usb_err;
305
306 if (cd[1] != 0x41) {
307 pr_err("Wrong descriptor type\n");
308 return -ENODEV;
309 }
310
311 if (!(cd[2] & SE401_FORMAT_BAYER)) {
312 pr_err("Bayer format not supported!\n");
313 return -ENODEV;
314 }
315
316 if (cd[3])
317 pr_info("ExtraFeatures: %d\n", cd[3]);
318
319 n = cd[4] | (cd[5] << 8);
320 if (n > MAX_MODES) {
321 pr_err("Too many frame sizes\n");
322 return -ENODEV;
323 }
324
325 for (i = 0; i < n ; i++) {
326 widths[i] = cd[6 + i * 4 + 0] | (cd[6 + i * 4 + 1] << 8);
327 heights[i] = cd[6 + i * 4 + 2] | (cd[6 + i * 4 + 3] << 8);
328 }
329
330 for (i = 0; i < n ; i++) {
331 sd->fmts[i].width = widths[i];
332 sd->fmts[i].height = heights[i];
333 sd->fmts[i].field = V4L2_FIELD_NONE;
334 sd->fmts[i].colorspace = V4L2_COLORSPACE_SRGB;
335 sd->fmts[i].priv = 1;
336
337 /* janggu compression only works for 1/4th or 1/16th res */
338 for (j = 0; j < n; j++) {
339 if (widths[j] / 2 == widths[i] &&
340 heights[j] / 2 == heights[i]) {
341 sd->fmts[i].priv = 2;
342 break;
343 }
344 }
345 /* 1/16th if available too is better then 1/4th, because
346 we then use a larger area of the sensor */
347 for (j = 0; j < n; j++) {
348 if (widths[j] / 4 == widths[i] &&
349 heights[j] / 4 == heights[i]) {
350 sd->fmts[i].priv = 4;
351 break;
352 }
353 }
354
355 if (sd->fmts[i].priv == 1) {
356 /* Not a 1/4th or 1/16th res, use bayer */
357 sd->fmts[i].pixelformat = V4L2_PIX_FMT_SBGGR8;
358 sd->fmts[i].bytesperline = widths[i];
359 sd->fmts[i].sizeimage = widths[i] * heights[i];
360 pr_info("Frame size: %dx%d bayer\n",
361 widths[i], heights[i]);
362 } else {
363 /* Found a match use janggu compression */
364 sd->fmts[i].pixelformat = V4L2_PIX_FMT_SE401;
365 sd->fmts[i].bytesperline = 0;
366 sd->fmts[i].sizeimage = widths[i] * heights[i] * 3;
367 pr_info("Frame size: %dx%d 1/%dth janggu\n",
368 widths[i], heights[i],
369 sd->fmts[i].priv * sd->fmts[i].priv);
370 }
371 }
372
373 cam->cam_mode = sd->fmts;
374 cam->nmodes = n;
375 cam->bulk = 1;
376 cam->bulk_size = BULK_SIZE;
377 cam->bulk_nurbs = 4;
378 cam->ctrls = sd->ctrls;
379 sd->resetlevel = 0x2d; /* Set initial resetlevel */
380
381 /* See if the camera supports brightness */
382 se401_read_req(gspca_dev, SE401_REQ_GET_BRT, 1);
383 if (gspca_dev->usb_err) {
384 gspca_dev->ctrl_dis = (1 << BRIGHTNESS);
385 gspca_dev->usb_err = 0;
386 }
387
388 return 0;
389 }
390
391 /* this function is called at probe and resume time */
392 static int sd_init(struct gspca_dev *gspca_dev)
393 {
394 return 0;
395 }
396
397 /* function called at start time before URB creation */
398 static int sd_isoc_init(struct gspca_dev *gspca_dev)
399 {
400 gspca_dev->alt = 1; /* Ignore the bogus isoc alt settings */
401
402 return gspca_dev->usb_err;
403 }
404
405 /* -- start the camera -- */
406 static int sd_start(struct gspca_dev *gspca_dev)
407 {
408 struct sd *sd = (struct sd *)gspca_dev;
409 int mult = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
410 int mode = 0;
411
412 se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 1, 1);
413 if (gspca_dev->usb_err) {
414 /* Sometimes after being idle for a while the se401 won't
415 respond and needs a good kicking */
416 usb_reset_device(gspca_dev->dev);
417 gspca_dev->usb_err = 0;
418 se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 1, 0);
419 }
420 se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 1, 0);
421
422 se401_set_feature(gspca_dev, HV7131_REG_MODE_B, 0x05);
423
424 /* set size + mode */
425 se401_write_req(gspca_dev, SE401_REQ_SET_WIDTH,
426 gspca_dev->width * mult, 0);
427 se401_write_req(gspca_dev, SE401_REQ_SET_HEIGHT,
428 gspca_dev->height * mult, 0);
429 /*
430 * HDG: disabled this as it does not seem to do anything
431 * se401_write_req(gspca_dev, SE401_REQ_SET_OUTPUT_MODE,
432 * SE401_FORMAT_BAYER, 0);
433 */
434
435 switch (mult) {
436 case 1: /* Raw bayer */
437 mode = 0x03; break;
438 case 2: /* 1/4th janggu */
439 mode = SE401_QUANT_FACT << 4; break;
440 case 4: /* 1/16th janggu */
441 mode = (SE401_QUANT_FACT << 4) | 0x02; break;
442 }
443 se401_set_feature(gspca_dev, SE401_OPERATINGMODE, mode);
444
445 setbrightness(gspca_dev);
446 setgain(gspca_dev);
447 setexposure(gspca_dev);
448 se401_set_feature(gspca_dev, HV7131_REG_ARLV, sd->resetlevel);
449
450 sd->packet_read = 0;
451 sd->pixels_read = 0;
452 sd->restart_stream = 0;
453 sd->resetlevel_frame_count = 0;
454 sd->resetlevel_adjust_dir = 0;
455 sd->expo_change_state = EXPO_NO_CHANGE;
456
457 se401_write_req(gspca_dev, SE401_REQ_START_CONTINUOUS_CAPTURE, 0, 0);
458
459 return gspca_dev->usb_err;
460 }
461
462 static void sd_stopN(struct gspca_dev *gspca_dev)
463 {
464 se401_write_req(gspca_dev, SE401_REQ_STOP_CONTINUOUS_CAPTURE, 0, 0);
465 se401_write_req(gspca_dev, SE401_REQ_LED_CONTROL, 0, 0);
466 se401_write_req(gspca_dev, SE401_REQ_CAMERA_POWER, 0, 0);
467 }
468
469 static void sd_dq_callback(struct gspca_dev *gspca_dev)
470 {
471 struct sd *sd = (struct sd *)gspca_dev;
472 unsigned int ahrc, alrc;
473 int oldreset, adjust_dir;
474
475 /* Restart the stream if requested do so by pkt_scan */
476 if (sd->restart_stream) {
477 sd_stopN(gspca_dev);
478 sd_start(gspca_dev);
479 sd->restart_stream = 0;
480 }
481
482 /* Automatically adjust sensor reset level
483 Hyundai have some really nice docs about this and other sensor
484 related stuff on their homepage: www.hei.co.kr */
485 sd->resetlevel_frame_count++;
486 if (sd->resetlevel_frame_count < 20)
487 return;
488
489 /* For some reason this normally read-only register doesn't get reset
490 to zero after reading them just once... */
491 se401_get_feature(gspca_dev, HV7131_REG_HIREFNOH);
492 se401_get_feature(gspca_dev, HV7131_REG_HIREFNOL);
493 se401_get_feature(gspca_dev, HV7131_REG_LOREFNOH);
494 se401_get_feature(gspca_dev, HV7131_REG_LOREFNOL);
495 ahrc = 256*se401_get_feature(gspca_dev, HV7131_REG_HIREFNOH) +
496 se401_get_feature(gspca_dev, HV7131_REG_HIREFNOL);
497 alrc = 256*se401_get_feature(gspca_dev, HV7131_REG_LOREFNOH) +
498 se401_get_feature(gspca_dev, HV7131_REG_LOREFNOL);
499
500 /* Not an exact science, but it seems to work pretty well... */
501 oldreset = sd->resetlevel;
502 if (alrc > 10) {
503 while (alrc >= 10 && sd->resetlevel < 63) {
504 sd->resetlevel++;
505 alrc /= 2;
506 }
507 } else if (ahrc > 20) {
508 while (ahrc >= 20 && sd->resetlevel > 0) {
509 sd->resetlevel--;
510 ahrc /= 2;
511 }
512 }
513 /* Detect ping-pong-ing and halve adjustment to avoid overshoot */
514 if (sd->resetlevel > oldreset)
515 adjust_dir = 1;
516 else
517 adjust_dir = -1;
518 if (sd->resetlevel_adjust_dir &&
519 sd->resetlevel_adjust_dir != adjust_dir)
520 sd->resetlevel = oldreset + (sd->resetlevel - oldreset) / 2;
521
522 if (sd->resetlevel != oldreset) {
523 sd->resetlevel_adjust_dir = adjust_dir;
524 se401_set_feature(gspca_dev, HV7131_REG_ARLV, sd->resetlevel);
525 }
526
527 sd->resetlevel_frame_count = 0;
528 }
529
530 static void sd_complete_frame(struct gspca_dev *gspca_dev, u8 *data, int len)
531 {
532 struct sd *sd = (struct sd *)gspca_dev;
533
534 switch (sd->expo_change_state) {
535 case EXPO_CHANGED:
536 /* The exposure was changed while this frame
537 was being send, so this frame is ok */
538 sd->expo_change_state = EXPO_DROP_FRAME;
539 break;
540 case EXPO_DROP_FRAME:
541 /* The exposure was changed while this frame
542 was being captured, drop it! */
543 gspca_dev->last_packet_type = DISCARD_PACKET;
544 sd->expo_change_state = EXPO_NO_CHANGE;
545 break;
546 case EXPO_NO_CHANGE:
547 break;
548 }
549 gspca_frame_add(gspca_dev, LAST_PACKET, data, len);
550 }
551
552 static void sd_pkt_scan_janggu(struct gspca_dev *gspca_dev, u8 *data, int len)
553 {
554 struct sd *sd = (struct sd *)gspca_dev;
555 int imagesize = gspca_dev->width * gspca_dev->height;
556 int i, plen, bits, pixels, info, count;
557
558 if (sd->restart_stream)
559 return;
560
561 /* Sometimes a 1024 bytes garbage bulk packet is send between frames */
562 if (gspca_dev->last_packet_type == LAST_PACKET && len == 1024) {
563 gspca_dev->last_packet_type = DISCARD_PACKET;
564 return;
565 }
566
567 i = 0;
568 while (i < len) {
569 /* Read header if not already be present from prev bulk pkt */
570 if (sd->packet_read < 4) {
571 count = 4 - sd->packet_read;
572 if (count > len - i)
573 count = len - i;
574 memcpy(&sd->packet[sd->packet_read], &data[i], count);
575 sd->packet_read += count;
576 i += count;
577 if (sd->packet_read < 4)
578 break;
579 }
580 bits = sd->packet[3] + (sd->packet[2] << 8);
581 pixels = sd->packet[1] + ((sd->packet[0] & 0x3f) << 8);
582 info = (sd->packet[0] & 0xc0) >> 6;
583 plen = ((bits + 47) >> 4) << 1;
584 /* Sanity checks */
585 if (plen > 1024) {
586 pr_err("invalid packet len %d restarting stream\n",
587 plen);
588 goto error;
589 }
590 if (info == 3) {
591 pr_err("unknown frame info value restarting stream\n");
592 goto error;
593 }
594
595 /* Read (remainder of) packet contents */
596 count = plen - sd->packet_read;
597 if (count > len - i)
598 count = len - i;
599 memcpy(&sd->packet[sd->packet_read], &data[i], count);
600 sd->packet_read += count;
601 i += count;
602 if (sd->packet_read < plen)
603 break;
604
605 sd->pixels_read += pixels;
606 sd->packet_read = 0;
607
608 switch (info) {
609 case 0: /* Frame data */
610 gspca_frame_add(gspca_dev, INTER_PACKET, sd->packet,
611 plen);
612 break;
613 case 1: /* EOF */
614 if (sd->pixels_read != imagesize) {
615 pr_err("frame size %d expected %d\n",
616 sd->pixels_read, imagesize);
617 goto error;
618 }
619 sd_complete_frame(gspca_dev, sd->packet, plen);
620 return; /* Discard the rest of the bulk packet !! */
621 case 2: /* SOF */
622 gspca_frame_add(gspca_dev, FIRST_PACKET, sd->packet,
623 plen);
624 sd->pixels_read = pixels;
625 break;
626 }
627 }
628 return;
629
630 error:
631 sd->restart_stream = 1;
632 /* Give userspace a 0 bytes frame, so our dq callback gets
633 called and it can restart the stream */
634 gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
635 gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
636 }
637
638 static void sd_pkt_scan_bayer(struct gspca_dev *gspca_dev, u8 *data, int len)
639 {
640 struct cam *cam = &gspca_dev->cam;
641 int imagesize = cam->cam_mode[gspca_dev->curr_mode].sizeimage;
642
643 if (gspca_dev->image_len == 0) {
644 gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
645 return;
646 }
647
648 if (gspca_dev->image_len + len >= imagesize) {
649 sd_complete_frame(gspca_dev, data, len);
650 return;
651 }
652
653 gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
654 }
655
656 static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, int len)
657 {
658 int mult = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
659
660 if (len == 0)
661 return;
662
663 if (mult == 1) /* mult == 1 means raw bayer */
664 sd_pkt_scan_bayer(gspca_dev, data, len);
665 else
666 sd_pkt_scan_janggu(gspca_dev, data, len);
667 }
668
669 static int sd_querymenu(struct gspca_dev *gspca_dev,
670 struct v4l2_querymenu *menu)
671 {
672 switch (menu->id) {
673 case V4L2_CID_POWER_LINE_FREQUENCY:
674 switch (menu->index) {
675 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
676 strcpy((char *) menu->name, "NoFliker");
677 return 0;
678 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
679 strcpy((char *) menu->name, "50 Hz");
680 return 0;
681 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
682 strcpy((char *) menu->name, "60 Hz");
683 return 0;
684 }
685 break;
686 }
687 return -EINVAL;
688 }
689
690 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
691 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, int len)
692 {
693 struct sd *sd = (struct sd *)gspca_dev;
694 u8 state;
695
696 if (len != 2)
697 return -EINVAL;
698
699 switch (data[0]) {
700 case 0:
701 case 1:
702 state = data[0];
703 break;
704 default:
705 return -EINVAL;
706 }
707 if (sd->button_state != state) {
708 input_report_key(gspca_dev->input_dev, KEY_CAMERA, state);
709 input_sync(gspca_dev->input_dev);
710 sd->button_state = state;
711 }
712
713 return 0;
714 }
715 #endif
716
717 /* sub-driver description */
718 static const struct sd_desc sd_desc = {
719 .name = MODULE_NAME,
720 .ctrls = sd_ctrls,
721 .nctrls = ARRAY_SIZE(sd_ctrls),
722 .config = sd_config,
723 .init = sd_init,
724 .isoc_init = sd_isoc_init,
725 .start = sd_start,
726 .stopN = sd_stopN,
727 .dq_callback = sd_dq_callback,
728 .pkt_scan = sd_pkt_scan,
729 .querymenu = sd_querymenu,
730 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
731 .int_pkt_scan = sd_int_pkt_scan,
732 #endif
733 };
734
735 /* -- module initialisation -- */
736 static const struct usb_device_id device_table[] = {
737 {USB_DEVICE(0x03e8, 0x0004)}, /* Endpoints/Aox SE401 */
738 {USB_DEVICE(0x0471, 0x030b)}, /* Philips PCVC665K */
739 {USB_DEVICE(0x047d, 0x5001)}, /* Kensington 67014 */
740 {USB_DEVICE(0x047d, 0x5002)}, /* Kensington 6701(5/7) */
741 {USB_DEVICE(0x047d, 0x5003)}, /* Kensington 67016 */
742 {}
743 };
744 MODULE_DEVICE_TABLE(usb, device_table);
745
746 /* -- device connect -- */
747 static int sd_probe(struct usb_interface *intf,
748 const struct usb_device_id *id)
749 {
750 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
751 THIS_MODULE);
752 }
753
754 static int sd_pre_reset(struct usb_interface *intf)
755 {
756 return 0;
757 }
758
759 static int sd_post_reset(struct usb_interface *intf)
760 {
761 return 0;
762 }
763
764 static struct usb_driver sd_driver = {
765 .name = MODULE_NAME,
766 .id_table = device_table,
767 .probe = sd_probe,
768 .disconnect = gspca_disconnect,
769 #ifdef CONFIG_PM
770 .suspend = gspca_suspend,
771 .resume = gspca_resume,
772 #endif
773 .pre_reset = sd_pre_reset,
774 .post_reset = sd_post_reset,
775 };
776
777 module_usb_driver(sd_driver);