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V4L/DVB (8613): v4l: move BKL down to the driver level.
[mirror_ubuntu-bionic-kernel.git] / drivers / media / video / stv680.c
1 /*
2 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
3 *
4 * Thanks to STMicroelectronics for information on the usb commands, and
5 * to Steve Miller at STM for his help and encouragement while I was
6 * writing this driver.
7 *
8 * This driver is based heavily on the
9 * Endpoints (formerly known as AOX) se401 USB Camera Driver
10 * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
11 *
12 * Still somewhat based on the Linux ov511 driver.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
21 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software Foundation,
26 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * History:
29 * ver 0.1 October, 2001. Initial attempt.
30 *
31 * ver 0.2 November, 2001. Fixed asbility to resize, added brightness
32 * function, made more stable (?)
33 *
34 * ver 0.21 Nov, 2001. Added gamma correction and white balance,
35 * due to Alexander Schwartz. Still trying to
36 * improve stablility. Moved stuff into stv680.h
37 *
38 * ver 0.22 Nov, 2001. Added sharpen function (by Michael Sweet,
39 * mike@easysw.com) from GIMP, also used in pencam.
40 * Simple, fast, good integer math routine.
41 *
42 * ver 0.23 Dec, 2001 (gkh)
43 * Took out sharpen function, ran code through
44 * Lindent, and did other minor tweaks to get
45 * things to work properly with 2.5.1
46 *
47 * ver 0.24 Jan, 2002 (kjs)
48 * Fixed the problem with webcam crashing after
49 * two pictures. Changed the way pic is halved to
50 * improve quality. Got rid of green line around
51 * frame. Fix brightness reset when changing size
52 * bug. Adjusted gamma filters slightly.
53 *
54 * ver 0.25 Jan, 2002 (kjs)
55 * Fixed a bug in which the driver sometimes attempted
56 * to set to a non-supported size. This allowed
57 * gnomemeeting to work.
58 * Fixed proc entry removal bug.
59 */
60
61 #include <linux/module.h>
62 #include <linux/init.h>
63 #include <linux/vmalloc.h>
64 #include <linux/slab.h>
65 #include <linux/pagemap.h>
66 #include <linux/errno.h>
67 #include <linux/videodev.h>
68 #include <media/v4l2-common.h>
69 #include <media/v4l2-ioctl.h>
70 #include <linux/usb.h>
71 #include <linux/mutex.h>
72
73 #include "stv680.h"
74
75 static int video_nr = -1;
76
77 static int swapRGB; /* 0 = default for auto select */
78
79 /* 0 = default to allow auto select; -1 = swap never, +1 = swap always */
80 static int swapRGB_on;
81
82 static unsigned int debug;
83
84 #define PDEBUG(level, fmt, args...) \
85 do { \
86 if (debug >= level) \
87 info("[%s:%d] " fmt, __func__, __LINE__ , ## args); \
88 } while (0)
89
90
91 /*
92 * Version Information
93 */
94 #define DRIVER_VERSION "v0.25"
95 #define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
96 #define DRIVER_DESC "STV0680 USB Camera Driver"
97
98 MODULE_AUTHOR (DRIVER_AUTHOR);
99 MODULE_DESCRIPTION (DRIVER_DESC);
100 MODULE_LICENSE ("GPL");
101 module_param(debug, int, S_IRUGO | S_IWUSR);
102 MODULE_PARM_DESC (debug, "Debug enabled or not");
103 module_param(swapRGB_on, int, 0);
104 MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
105 module_param(video_nr, int, 0);
106
107 /********************************************************************
108 *
109 * Memory management
110 *
111 * This is a shameless copy from the USB-cpia driver (linux kernel
112 * version 2.3.29 or so, I have no idea what this code actually does ;).
113 * Actually it seems to be a copy of a shameless copy of the bttv-driver.
114 * Or that is a copy of a shameless copy of ... (To the powers: is there
115 * no generic kernel-function to do this sort of stuff?)
116 *
117 * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
118 * there will be one, but apparentely not yet -jerdfelt
119 *
120 * So I copied it again for the ov511 driver -claudio
121 *
122 * Same for the se401 driver -Jeroen
123 *
124 * And the STV0680 driver - Kevin
125 ********************************************************************/
126 static void *rvmalloc (unsigned long size)
127 {
128 void *mem;
129 unsigned long adr;
130
131 size = PAGE_ALIGN(size);
132 mem = vmalloc_32 (size);
133 if (!mem)
134 return NULL;
135
136 memset (mem, 0, size); /* Clear the ram out, no junk to the user */
137 adr = (unsigned long) mem;
138 while (size > 0) {
139 SetPageReserved(vmalloc_to_page((void *)adr));
140 adr += PAGE_SIZE;
141 size -= PAGE_SIZE;
142 }
143 return mem;
144 }
145
146 static void rvfree (void *mem, unsigned long size)
147 {
148 unsigned long adr;
149
150 if (!mem)
151 return;
152
153 adr = (unsigned long) mem;
154 while ((long) size > 0) {
155 ClearPageReserved(vmalloc_to_page((void *)adr));
156 adr += PAGE_SIZE;
157 size -= PAGE_SIZE;
158 }
159 vfree (mem);
160 }
161
162
163 /*********************************************************************
164 * pencam read/write functions
165 ********************************************************************/
166
167 static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
168 {
169 int ret = -1;
170
171 switch (set) {
172 case 0: /* 0xc1 */
173 ret = usb_control_msg (stv680->udev,
174 usb_rcvctrlpipe (stv680->udev, 0),
175 req,
176 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
177 value, 0, buffer, size, PENCAM_TIMEOUT);
178 break;
179
180 case 1: /* 0x41 */
181 ret = usb_control_msg (stv680->udev,
182 usb_sndctrlpipe (stv680->udev, 0),
183 req,
184 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
185 value, 0, buffer, size, PENCAM_TIMEOUT);
186 break;
187
188 case 2: /* 0x80 */
189 ret = usb_control_msg (stv680->udev,
190 usb_rcvctrlpipe (stv680->udev, 0),
191 req,
192 (USB_DIR_IN | USB_RECIP_DEVICE),
193 value, 0, buffer, size, PENCAM_TIMEOUT);
194 break;
195
196 case 3: /* 0x40 */
197 ret = usb_control_msg (stv680->udev,
198 usb_sndctrlpipe (stv680->udev, 0),
199 req,
200 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
201 value, 0, buffer, size, PENCAM_TIMEOUT);
202 break;
203
204 }
205 if ((ret < 0) && (req != 0x0a)) {
206 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
207 }
208 return ret;
209 }
210
211 static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
212 {
213
214 if (configuration != dev->udev->actconfig->desc.bConfigurationValue
215 || usb_reset_configuration (dev->udev) < 0) {
216 PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
217 return -1;
218 }
219 if (usb_set_interface (dev->udev, interface, alternate) < 0) {
220 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
221 return -1;
222 }
223 return 0;
224 }
225
226 static int stv_stop_video (struct usb_stv *dev)
227 {
228 int i;
229 unsigned char *buf;
230
231 buf = kmalloc (40, GFP_KERNEL);
232 if (buf == NULL) {
233 PDEBUG (0, "STV(e): Out of (small buf) memory");
234 return -1;
235 }
236
237 /* this is a high priority command; it stops all lower order commands */
238 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
239 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
240 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
241 } else {
242 PDEBUG (1, "STV(i): Camera reset to idle mode.");
243 }
244
245 if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
246 PDEBUG (1, "STV(e): Reset config during exit failed");
247
248 /* get current mode */
249 buf[0] = 0xf0;
250 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
251 PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
252 if (dev->origMode != buf[0]) {
253 memset (buf, 0, 8);
254 buf[0] = (unsigned char) dev->origMode;
255 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
256 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
257 i = -1;
258 }
259 buf[0] = 0xf0;
260 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
261 if ((i != 0x08) || (buf[0] != dev->origMode)) {
262 PDEBUG (0, "STV(e): camera NOT set to original resolution.");
263 i = -1;
264 } else
265 PDEBUG (0, "STV(i): Camera set to original resolution");
266 }
267 /* origMode */
268 kfree(buf);
269 return i;
270 }
271
272 static int stv_set_video_mode (struct usb_stv *dev)
273 {
274 int i, stop_video = 1;
275 unsigned char *buf;
276
277 buf = kmalloc (40, GFP_KERNEL);
278 if (buf == NULL) {
279 PDEBUG (0, "STV(e): Out of (small buf) memory");
280 return -1;
281 }
282
283 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
284 kfree(buf);
285 return i;
286 }
287
288 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
289 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
290 PDEBUG (1, "STV(e): Could not get descriptor 0100.");
291 goto error;
292 }
293
294 /* set alternate interface 1 */
295 if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
296 goto error;
297
298 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
299 goto error;
300 PDEBUG (1, "STV(i): Setting video mode.");
301 /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
302 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
303 stop_video = 0;
304 goto error;
305 }
306 goto exit;
307
308 error:
309 kfree(buf);
310 if (stop_video == 1)
311 stv_stop_video (dev);
312 return -1;
313
314 exit:
315 kfree(buf);
316 return 0;
317 }
318
319 static int stv_init (struct usb_stv *stv680)
320 {
321 int i = 0;
322 unsigned char *buffer;
323 unsigned long int bufsize;
324
325 buffer = kzalloc (40, GFP_KERNEL);
326 if (buffer == NULL) {
327 PDEBUG (0, "STV(e): Out of (small buf) memory");
328 return -1;
329 }
330 udelay (100);
331
332 /* set config 1, interface 0, alternate 0 */
333 if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
334 kfree(buffer);
335 PDEBUG (0, "STV(e): set config 1,0,0 failed");
336 return -1;
337 }
338 /* ping camera to be sure STV0680 is present */
339 if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
340 goto error;
341 if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
342 PDEBUG (1, "STV(e): camera ping failed!!");
343 goto error;
344 }
345
346 /* get camera descriptor */
347 if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
348 goto error;
349 i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
350 if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
351 PDEBUG (1, "STV(e): Could not get descriptor 0200.");
352 goto error;
353 }
354 if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
355 goto error;
356 if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
357 goto error;
358 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
359 goto error;
360
361 stv680->SupportedModes = buffer[7];
362 i = stv680->SupportedModes;
363 stv680->CIF = 0;
364 stv680->VGA = 0;
365 stv680->QVGA = 0;
366 if (i & 1)
367 stv680->CIF = 1;
368 if (i & 2)
369 stv680->VGA = 1;
370 if (i & 8)
371 stv680->QVGA = 1;
372 if (stv680->SupportedModes == 0) {
373 PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
374 i = -1;
375 goto error;
376 } else {
377 if (stv680->CIF)
378 PDEBUG (0, "STV(i): CIF is supported");
379 if (stv680->QVGA)
380 PDEBUG (0, "STV(i): QVGA is supported");
381 }
382 /* FW rev, ASIC rev, sensor ID */
383 PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
384 PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
385 PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
386
387 /* set alternate interface 1 */
388 if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
389 goto error;
390
391 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
392 goto error;
393 if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
394 goto error;
395 i = buffer[3];
396 PDEBUG (0, "STV(i): Camera has %i pictures.", i);
397
398 /* get current mode */
399 if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
400 goto error;
401 stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
402
403 /* This will attemp CIF mode, if supported. If not, set to QVGA */
404 memset (buffer, 0, 8);
405 if (stv680->CIF)
406 buffer[0] = 0x00;
407 else if (stv680->QVGA)
408 buffer[0] = 0x03;
409 if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
410 PDEBUG (0, "STV(i): Set_Camera_Mode failed");
411 i = -1;
412 goto error;
413 }
414 buffer[0] = 0xf0;
415 stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
416 if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
417 PDEBUG (0, "STV(e): Error setting camera video mode!");
418 i = -1;
419 goto error;
420 } else {
421 if (buffer[0] == 0) {
422 stv680->VideoMode = 0x0000;
423 PDEBUG (0, "STV(i): Video Mode set to CIF");
424 }
425 if (buffer[0] == 0x03) {
426 stv680->VideoMode = 0x0300;
427 PDEBUG (0, "STV(i): Video Mode set to QVGA");
428 }
429 }
430 if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
431 goto error;
432 bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
433 stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */
434 stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */
435 stv680->origGain = buffer[12];
436
437 goto exit;
438
439 error:
440 i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */
441 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
442 kfree(buffer);
443 return -1;
444
445 exit:
446 kfree(buffer);
447
448 /* video = 320x240, 352x288 */
449 if (stv680->CIF == 1) {
450 stv680->maxwidth = 352;
451 stv680->maxheight = 288;
452 stv680->vwidth = 352;
453 stv680->vheight = 288;
454 }
455 if (stv680->QVGA == 1) {
456 stv680->maxwidth = 320;
457 stv680->maxheight = 240;
458 stv680->vwidth = 320;
459 stv680->vheight = 240;
460 }
461
462 stv680->rawbufsize = bufsize; /* must be ./. by 8 */
463 stv680->maxframesize = bufsize * 3; /* RGB size */
464 PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
465 PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
466
467 /* some default values */
468 stv680->bulk_in_endpointAddr = 0x82;
469 stv680->dropped = 0;
470 stv680->error = 0;
471 stv680->framecount = 0;
472 stv680->readcount = 0;
473 stv680->streaming = 0;
474 /* bright, white, colour, hue, contrast are set by software, not in stv0680 */
475 stv680->brightness = 32767;
476 stv680->chgbright = 0;
477 stv680->whiteness = 0; /* only for greyscale */
478 stv680->colour = 32767;
479 stv680->contrast = 32767;
480 stv680->hue = 32767;
481 stv680->palette = STV_VIDEO_PALETTE;
482 stv680->depth = 24; /* rgb24 bits */
483 if ((swapRGB_on == 0) && (swapRGB == 0))
484 PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
485 else if ((swapRGB_on == 0) && (swapRGB == 1))
486 PDEBUG (1, "STV(i): swapRGB is (auto) ON");
487 else if (swapRGB_on == 1)
488 PDEBUG (1, "STV(i): swapRGB is (forced) ON");
489 else if (swapRGB_on == -1)
490 PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
491
492 if (stv_set_video_mode (stv680) < 0) {
493 PDEBUG (0, "STV(e): Could not set video mode in stv_init");
494 return -1;
495 }
496
497 return 0;
498 }
499
500 /***************** last of pencam routines *******************/
501
502 /****************************************************************************
503 * sysfs
504 ***************************************************************************/
505 #define stv680_file(name, variable, field) \
506 static ssize_t show_##name(struct device *class_dev, \
507 struct device_attribute *attr, char *buf) \
508 { \
509 struct video_device *vdev = to_video_device(class_dev); \
510 struct usb_stv *stv = video_get_drvdata(vdev); \
511 return sprintf(buf, field, stv->variable); \
512 } \
513 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
514
515 stv680_file(model, camera_name, "%s\n");
516 stv680_file(in_use, user, "%d\n");
517 stv680_file(streaming, streaming, "%d\n");
518 stv680_file(palette, palette, "%i\n");
519 stv680_file(frames_total, readcount, "%d\n");
520 stv680_file(frames_read, framecount, "%d\n");
521 stv680_file(packets_dropped, dropped, "%d\n");
522 stv680_file(decoding_errors, error, "%d\n");
523
524 static int stv680_create_sysfs_files(struct video_device *vdev)
525 {
526 int rc;
527
528 rc = device_create_file(&vdev->dev, &dev_attr_model);
529 if (rc) goto err;
530 rc = device_create_file(&vdev->dev, &dev_attr_in_use);
531 if (rc) goto err_model;
532 rc = device_create_file(&vdev->dev, &dev_attr_streaming);
533 if (rc) goto err_inuse;
534 rc = device_create_file(&vdev->dev, &dev_attr_palette);
535 if (rc) goto err_stream;
536 rc = device_create_file(&vdev->dev, &dev_attr_frames_total);
537 if (rc) goto err_pal;
538 rc = device_create_file(&vdev->dev, &dev_attr_frames_read);
539 if (rc) goto err_framtot;
540 rc = device_create_file(&vdev->dev, &dev_attr_packets_dropped);
541 if (rc) goto err_framread;
542 rc = device_create_file(&vdev->dev, &dev_attr_decoding_errors);
543 if (rc) goto err_dropped;
544
545 return 0;
546
547 err_dropped:
548 device_remove_file(&vdev->dev, &dev_attr_packets_dropped);
549 err_framread:
550 device_remove_file(&vdev->dev, &dev_attr_frames_read);
551 err_framtot:
552 device_remove_file(&vdev->dev, &dev_attr_frames_total);
553 err_pal:
554 device_remove_file(&vdev->dev, &dev_attr_palette);
555 err_stream:
556 device_remove_file(&vdev->dev, &dev_attr_streaming);
557 err_inuse:
558 device_remove_file(&vdev->dev, &dev_attr_in_use);
559 err_model:
560 device_remove_file(&vdev->dev, &dev_attr_model);
561 err:
562 PDEBUG(0, "STV(e): Could not create sysfs files");
563 return rc;
564 }
565
566 static void stv680_remove_sysfs_files(struct video_device *vdev)
567 {
568 device_remove_file(&vdev->dev, &dev_attr_model);
569 device_remove_file(&vdev->dev, &dev_attr_in_use);
570 device_remove_file(&vdev->dev, &dev_attr_streaming);
571 device_remove_file(&vdev->dev, &dev_attr_palette);
572 device_remove_file(&vdev->dev, &dev_attr_frames_total);
573 device_remove_file(&vdev->dev, &dev_attr_frames_read);
574 device_remove_file(&vdev->dev, &dev_attr_packets_dropped);
575 device_remove_file(&vdev->dev, &dev_attr_decoding_errors);
576 }
577
578 /********************************************************************
579 * Camera control
580 *******************************************************************/
581
582 static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
583 {
584 /* This sets values for v4l interface. max/min = 65535/0 */
585
586 p->brightness = stv680->brightness;
587 p->whiteness = stv680->whiteness; /* greyscale */
588 p->colour = stv680->colour;
589 p->contrast = stv680->contrast;
590 p->hue = stv680->hue;
591 p->palette = stv680->palette;
592 p->depth = stv680->depth;
593 return 0;
594 }
595
596 static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
597 {
598 /* See above stv680_get_pict */
599
600 if (p->palette != STV_VIDEO_PALETTE) {
601 PDEBUG (2, "STV(e): Palette set error in _set_pic");
602 return 1;
603 }
604
605 if (stv680->brightness != p->brightness) {
606 stv680->chgbright = 1;
607 stv680->brightness = p->brightness;
608 }
609
610 stv680->whiteness = p->whiteness; /* greyscale */
611 stv680->colour = p->colour;
612 stv680->contrast = p->contrast;
613 stv680->hue = p->hue;
614 stv680->palette = p->palette;
615 stv680->depth = p->depth;
616
617 return 0;
618 }
619
620 static void stv680_video_irq (struct urb *urb)
621 {
622 struct usb_stv *stv680 = urb->context;
623 int length = urb->actual_length;
624
625 if (length < stv680->rawbufsize)
626 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
627
628 /* ohoh... */
629 if (!stv680->streaming)
630 return;
631
632 if (!stv680->udev) {
633 PDEBUG (0, "STV(e): device vapourished in video_irq");
634 return;
635 }
636
637 /* 0 sized packets happen if we are to fast, but sometimes the camera
638 keeps sending them forever...
639 */
640 if (length && !urb->status) {
641 stv680->nullpackets = 0;
642 switch (stv680->scratch[stv680->scratch_next].state) {
643 case BUFFER_READY:
644 case BUFFER_BUSY:
645 stv680->dropped++;
646 break;
647
648 case BUFFER_UNUSED:
649 memcpy (stv680->scratch[stv680->scratch_next].data,
650 (unsigned char *) urb->transfer_buffer, length);
651 stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
652 stv680->scratch[stv680->scratch_next].length = length;
653 if (waitqueue_active (&stv680->wq)) {
654 wake_up_interruptible (&stv680->wq);
655 }
656 stv680->scratch_overflow = 0;
657 stv680->scratch_next++;
658 if (stv680->scratch_next >= STV680_NUMSCRATCH)
659 stv680->scratch_next = 0;
660 break;
661 } /* switch */
662 } else {
663 stv680->nullpackets++;
664 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
665 if (waitqueue_active (&stv680->wq)) {
666 wake_up_interruptible (&stv680->wq);
667 }
668 }
669 } /* if - else */
670
671 /* Resubmit urb for new data */
672 urb->status = 0;
673 urb->dev = stv680->udev;
674 if (usb_submit_urb (urb, GFP_ATOMIC))
675 PDEBUG (0, "STV(e): urb burned down in video irq");
676 return;
677 } /* _video_irq */
678
679 static int stv680_start_stream (struct usb_stv *stv680)
680 {
681 struct urb *urb;
682 int err = 0, i;
683
684 stv680->streaming = 1;
685
686 /* Do some memory allocation */
687 for (i = 0; i < STV680_NUMFRAMES; i++) {
688 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
689 stv680->frame[i].curpix = 0;
690 }
691 /* packet size = 4096 */
692 for (i = 0; i < STV680_NUMSBUF; i++) {
693 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
694 if (stv680->sbuf[i].data == NULL) {
695 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
696 goto nomem_err;
697 }
698 }
699
700 stv680->scratch_next = 0;
701 stv680->scratch_use = 0;
702 stv680->scratch_overflow = 0;
703 for (i = 0; i < STV680_NUMSCRATCH; i++) {
704 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
705 if (stv680->scratch[i].data == NULL) {
706 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
707 goto nomem_err;
708 }
709 stv680->scratch[i].state = BUFFER_UNUSED;
710 }
711
712 for (i = 0; i < STV680_NUMSBUF; i++) {
713 urb = usb_alloc_urb (0, GFP_KERNEL);
714 if (!urb)
715 goto nomem_err;
716
717 /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
718 usb_fill_bulk_urb (urb, stv680->udev,
719 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
720 stv680->sbuf[i].data, stv680->rawbufsize,
721 stv680_video_irq, stv680);
722 stv680->urb[i] = urb;
723 err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
724 if (err) {
725 PDEBUG (0, "STV(e): urb burned down with err "
726 "%d in start stream %d", err, i);
727 goto nomem_err;
728 }
729 } /* i STV680_NUMSBUF */
730
731 stv680->framecount = 0;
732 return 0;
733
734 nomem_err:
735 for (i = 0; i < STV680_NUMSCRATCH; i++) {
736 kfree(stv680->scratch[i].data);
737 stv680->scratch[i].data = NULL;
738 }
739 for (i = 0; i < STV680_NUMSBUF; i++) {
740 usb_kill_urb(stv680->urb[i]);
741 usb_free_urb(stv680->urb[i]);
742 stv680->urb[i] = NULL;
743 kfree(stv680->sbuf[i].data);
744 stv680->sbuf[i].data = NULL;
745 }
746 return -ENOMEM;
747
748 }
749
750 static int stv680_stop_stream (struct usb_stv *stv680)
751 {
752 int i;
753
754 if (!stv680->streaming || !stv680->udev)
755 return 1;
756
757 stv680->streaming = 0;
758
759 for (i = 0; i < STV680_NUMSBUF; i++)
760 if (stv680->urb[i]) {
761 usb_kill_urb (stv680->urb[i]);
762 usb_free_urb (stv680->urb[i]);
763 stv680->urb[i] = NULL;
764 kfree(stv680->sbuf[i].data);
765 }
766 for (i = 0; i < STV680_NUMSCRATCH; i++) {
767 kfree(stv680->scratch[i].data);
768 stv680->scratch[i].data = NULL;
769 }
770
771 return 0;
772 }
773
774 static int stv680_set_size (struct usb_stv *stv680, int width, int height)
775 {
776 int wasstreaming = stv680->streaming;
777
778 /* Check to see if we need to change */
779 if ((stv680->vwidth == width) && (stv680->vheight == height))
780 return 0;
781
782 PDEBUG (1, "STV(i): size request for %i x %i", width, height);
783 /* Check for a valid mode */
784 if ((!width || !height) || ((width & 1) || (height & 1))) {
785 PDEBUG (1, "STV(e): set_size error: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
786 return 1;
787 }
788
789 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
790 width = stv680->maxwidth / 2;
791 height = stv680->maxheight / 2;
792 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
793 width = 160;
794 height = 120;
795 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
796 width = 176;
797 height = 144;
798 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
799 width = 320;
800 height = 240;
801 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
802 width = 352;
803 height = 288;
804 } else {
805 PDEBUG (1, "STV(e): request for non-supported size: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
806 return 1;
807 }
808
809 /* Stop a current stream and start it again at the new size */
810 if (wasstreaming)
811 stv680_stop_stream (stv680);
812 stv680->vwidth = width;
813 stv680->vheight = height;
814 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
815 if (wasstreaming)
816 stv680_start_stream (stv680);
817
818 return 0;
819 }
820
821 /**********************************************************************
822 * Video Decoding
823 **********************************************************************/
824
825 /******* routines from the pencam program; hey, they work! ********/
826
827 /*
828 * STV0680 Vision Camera Chipset Driver
829 * Copyright (C) 2000 Adam Harrison <adam@antispin.org>
830 */
831
832 #define RED 0
833 #define GREEN 1
834 #define BLUE 2
835 #define AD(x, y, w) (((y)*(w)+(x))*3)
836
837 static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
838 {
839 int x, y, i;
840 int w = stv680->cwidth;
841 int vw = stv680->cwidth, vh = stv680->cheight;
842 unsigned int p = 0;
843 int colour = 0, bayer = 0;
844 unsigned char *raw = buffer->data;
845 struct stv680_frame *frame = &stv680->frame[stv680->curframe];
846 unsigned char *output = frame->data;
847 unsigned char *temp = frame->data;
848 int offset = buffer->offset;
849
850 if (frame->curpix == 0) {
851 if (frame->grabstate == FRAME_READY) {
852 frame->grabstate = FRAME_GRABBING;
853 }
854 }
855 if (offset != frame->curpix) { /* Regard frame as lost :( */
856 frame->curpix = 0;
857 stv680->error++;
858 return;
859 }
860
861 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
862 vw = 320;
863 vh = 240;
864 }
865 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
866 vw = 352;
867 vh = 288;
868 }
869
870 memset (output, 0, 3 * vw * vh); /* clear output matrix. */
871
872 for (y = 0; y < vh; y++) {
873 for (x = 0; x < vw; x++) {
874 if (x & 1)
875 p = *(raw + y * w + (x >> 1));
876 else
877 p = *(raw + y * w + (x >> 1) + (w >> 1));
878
879 if (y & 1)
880 bayer = 2;
881 else
882 bayer = 0;
883 if (x & 1)
884 bayer++;
885
886 switch (bayer) {
887 case 0:
888 case 3:
889 colour = 1;
890 break;
891 case 1:
892 colour = 0;
893 break;
894 case 2:
895 colour = 2;
896 break;
897 }
898 i = (y * vw + x) * 3;
899 *(output + i + colour) = (unsigned char) p;
900 } /* for x */
901
902 } /* for y */
903
904 /****** gamma correction plus hardcoded white balance */
905 /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
906 Correction values red[], green[], blue[], are generated by
907 (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
908 White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
909 converted to unsigned char. Values are in stv680.h */
910
911 for (y = 0; y < vh; y++) {
912 for (x = 0; x < vw; x++) {
913 i = (y * vw + x) * 3;
914 *(output + i) = red[*(output + i)];
915 *(output + i + 1) = green[*(output + i + 1)];
916 *(output + i + 2) = blue[*(output + i + 2)];
917 }
918 }
919
920 /****** bayer demosaic ******/
921 for (y = 1; y < (vh - 1); y++) {
922 for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
923 if (y & 1)
924 bayer = 0;
925 else
926 bayer = 2;
927 if (!(x & 1))
928 bayer++;
929
930 switch (bayer) {
931 case 0: /* green. blue lr, red tb */
932 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
933 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
934 break;
935
936 case 1: /* blue. green lrtb, red diagonals */
937 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
938 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y - 1, vw) + RED) + (int) *(output + AD (x - 1, y + 1, vw) + RED) + (int) *(output + AD (x + 1, y - 1, vw) + RED) + (int) *(output + AD (x + 1, y + 1, vw) + RED)) >> 2;
939 break;
940
941 case 2: /* red. green lrtb, blue diagonals */
942 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
943 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y - 1, vw) + BLUE) + (int) *(output + AD (x + 1, y - 1, vw) + BLUE) + (int) *(output + AD (x - 1, y + 1, vw) + BLUE) + (int) *(output + AD (x + 1, y + 1, vw) + BLUE)) >> 2;
944 break;
945
946 case 3: /* green. red lr, blue tb */
947 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
948 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
949 break;
950 } /* switch */
951 } /* for x */
952 } /* for y - end demosaic */
953
954 /* fix top and bottom row, left and right side */
955 i = vw * 3;
956 memcpy (output, (output + i), i);
957 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
958 for (y = 0; y < vh; y++) {
959 i = y * vw * 3;
960 memcpy ((output + i), (output + i + 3), 3);
961 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
962 }
963
964 /* process all raw data, then trim to size if necessary */
965 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
966 i = 0;
967 for (y = 0; y < vh; y++) {
968 if (!(y & 1)) {
969 for (x = 0; x < vw; x++) {
970 p = (y * vw + x) * 3;
971 if (!(x & 1)) {
972 *(output + i) = *(output + p);
973 *(output + i + 1) = *(output + p + 1);
974 *(output + i + 2) = *(output + p + 2);
975 i += 3;
976 }
977 } /* for x */
978 }
979 } /* for y */
980 }
981 /* reset to proper width */
982 if ((stv680->vwidth == 160)) {
983 vw = 160;
984 vh = 120;
985 }
986 if ((stv680->vwidth == 176)) {
987 vw = 176;
988 vh = 144;
989 }
990
991 /* output is RGB; some programs want BGR */
992 /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
993 /* swapRGB_on=-1, never swap */
994 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
995 for (y = 0; y < vh; y++) {
996 for (x = 0; x < vw; x++) {
997 i = (y * vw + x) * 3;
998 *(temp) = *(output + i);
999 *(output + i) = *(output + i + 2);
1000 *(output + i + 2) = *(temp);
1001 }
1002 }
1003 }
1004 /* brightness */
1005 if (stv680->chgbright == 1) {
1006 if (stv680->brightness >= 32767) {
1007 p = (stv680->brightness - 32767) / 256;
1008 for (x = 0; x < (vw * vh * 3); x++) {
1009 if ((*(output + x) + (unsigned char) p) > 255)
1010 *(output + x) = 255;
1011 else
1012 *(output + x) += (unsigned char) p;
1013 } /* for */
1014 } else {
1015 p = (32767 - stv680->brightness) / 256;
1016 for (x = 0; x < (vw * vh * 3); x++) {
1017 if ((unsigned char) p > *(output + x))
1018 *(output + x) = 0;
1019 else
1020 *(output + x) -= (unsigned char) p;
1021 } /* for */
1022 } /* else */
1023 }
1024 /* if */
1025 frame->curpix = 0;
1026 frame->curlinepix = 0;
1027 frame->grabstate = FRAME_DONE;
1028 stv680->framecount++;
1029 stv680->readcount++;
1030 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
1031 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
1032 }
1033
1034 } /* bayer_unshuffle */
1035
1036 /******* end routines from the pencam program *********/
1037
1038 static int stv680_newframe (struct usb_stv *stv680, int framenr)
1039 {
1040 int errors = 0;
1041
1042 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
1043 if (!stv680->frame[framenr].curpix) {
1044 errors++;
1045 }
1046 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
1047
1048 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
1049 stv680->nullpackets = 0;
1050 PDEBUG (2, "STV(i): too many null length packets, restarting capture");
1051 stv680_stop_stream (stv680);
1052 stv680_start_stream (stv680);
1053 } else {
1054 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
1055 stv680->frame[framenr].grabstate = FRAME_ERROR;
1056 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
1057 return -EIO;
1058 }
1059 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
1060
1061 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
1062
1063 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
1064 stv680->scratch_use++;
1065 if (stv680->scratch_use >= STV680_NUMSCRATCH)
1066 stv680->scratch_use = 0;
1067 if (errors > STV680_MAX_ERRORS) {
1068 errors = 0;
1069 PDEBUG (2, "STV(i): too many errors, restarting capture");
1070 stv680_stop_stream (stv680);
1071 stv680_start_stream (stv680);
1072 }
1073 } /* else */
1074 } /* while */
1075 return 0;
1076 }
1077
1078 /*********************************************************************
1079 * Video4Linux
1080 *********************************************************************/
1081
1082 static int stv_open (struct inode *inode, struct file *file)
1083 {
1084 struct video_device *dev = video_devdata(file);
1085 struct usb_stv *stv680 = video_get_drvdata(dev);
1086 int err = 0;
1087
1088 /* we are called with the BKL held */
1089 lock_kernel();
1090 stv680->user = 1;
1091 err = stv_init (stv680); /* main initialization routine for camera */
1092
1093 if (err >= 0) {
1094 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
1095 if (!stv680->fbuf) {
1096 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
1097 err = -ENOMEM;
1098 }
1099 file->private_data = dev;
1100 }
1101 if (err)
1102 stv680->user = 0;
1103 unlock_kernel();
1104
1105 return err;
1106 }
1107
1108 static int stv_close (struct inode *inode, struct file *file)
1109 {
1110 struct video_device *dev = file->private_data;
1111 struct usb_stv *stv680 = video_get_drvdata(dev);
1112 int i;
1113
1114 for (i = 0; i < STV680_NUMFRAMES; i++)
1115 stv680->frame[i].grabstate = FRAME_UNUSED;
1116 if (stv680->streaming)
1117 stv680_stop_stream (stv680);
1118
1119 if ((i = stv_stop_video (stv680)) < 0)
1120 PDEBUG (1, "STV(e): stop_video failed in stv_close");
1121
1122 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
1123 stv680->user = 0;
1124
1125 if (stv680->removed) {
1126 kfree(stv680);
1127 stv680 = NULL;
1128 PDEBUG (0, "STV(i): device unregistered");
1129 }
1130 file->private_data = NULL;
1131 return 0;
1132 }
1133
1134 static int stv680_do_ioctl (struct inode *inode, struct file *file,
1135 unsigned int cmd, void *arg)
1136 {
1137 struct video_device *vdev = file->private_data;
1138 struct usb_stv *stv680 = video_get_drvdata(vdev);
1139
1140 if (!stv680->udev)
1141 return -EIO;
1142
1143 switch (cmd) {
1144 case VIDIOCGCAP:{
1145 struct video_capability *b = arg;
1146
1147 strcpy (b->name, stv680->camera_name);
1148 b->type = VID_TYPE_CAPTURE;
1149 b->channels = 1;
1150 b->audios = 0;
1151 b->maxwidth = stv680->maxwidth;
1152 b->maxheight = stv680->maxheight;
1153 b->minwidth = stv680->maxwidth / 2;
1154 b->minheight = stv680->maxheight / 2;
1155 return 0;
1156 }
1157 case VIDIOCGCHAN:{
1158 struct video_channel *v = arg;
1159
1160 if (v->channel != 0)
1161 return -EINVAL;
1162 v->flags = 0;
1163 v->tuners = 0;
1164 v->type = VIDEO_TYPE_CAMERA;
1165 strcpy (v->name, "STV Camera");
1166 return 0;
1167 }
1168 case VIDIOCSCHAN:{
1169 struct video_channel *v = arg;
1170 if (v->channel != 0)
1171 return -EINVAL;
1172 return 0;
1173 }
1174 case VIDIOCGPICT:{
1175 struct video_picture *p = arg;
1176
1177 stv680_get_pict (stv680, p);
1178 return 0;
1179 }
1180 case VIDIOCSPICT:{
1181 struct video_picture *p = arg;
1182
1183 if (stv680_set_pict (stv680, p))
1184 return -EINVAL;
1185 return 0;
1186 }
1187 case VIDIOCSWIN:{
1188 struct video_window *vw = arg;
1189
1190 if (vw->flags)
1191 return -EINVAL;
1192 if (vw->clipcount)
1193 return -EINVAL;
1194 if (vw->width != stv680->vwidth) {
1195 if (stv680_set_size (stv680, vw->width, vw->height)) {
1196 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
1197 return -EINVAL;
1198 }
1199 }
1200 return 0;
1201 }
1202 case VIDIOCGWIN:{
1203 struct video_window *vw = arg;
1204
1205 vw->x = 0; /* FIXME */
1206 vw->y = 0;
1207 vw->chromakey = 0;
1208 vw->flags = 0;
1209 vw->clipcount = 0;
1210 vw->width = stv680->vwidth;
1211 vw->height = stv680->vheight;
1212 return 0;
1213 }
1214 case VIDIOCGMBUF:{
1215 struct video_mbuf *vm = arg;
1216 int i;
1217
1218 memset (vm, 0, sizeof (*vm));
1219 vm->size = STV680_NUMFRAMES * stv680->maxframesize;
1220 vm->frames = STV680_NUMFRAMES;
1221 for (i = 0; i < STV680_NUMFRAMES; i++)
1222 vm->offsets[i] = stv680->maxframesize * i;
1223 return 0;
1224 }
1225 case VIDIOCMCAPTURE:{
1226 struct video_mmap *vm = arg;
1227
1228 if (vm->format != STV_VIDEO_PALETTE) {
1229 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
1230 vm->format, STV_VIDEO_PALETTE);
1231 if ((vm->format == 3) && (swapRGB_on == 0)) {
1232 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
1233 /* this may fix those apps (e.g., xawtv) that want BGR */
1234 swapRGB = 1;
1235 }
1236 return -EINVAL;
1237 }
1238 if (vm->frame >= STV680_NUMFRAMES) {
1239 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
1240 return -EINVAL;
1241 }
1242 if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
1243 || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
1244 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
1245 stv680->frame[vm->frame].grabstate);
1246 return -EBUSY;
1247 }
1248 /* Is this according to the v4l spec??? */
1249 if (stv680->vwidth != vm->width) {
1250 if (stv680_set_size (stv680, vm->width, vm->height)) {
1251 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
1252 return -EINVAL;
1253 }
1254 }
1255 stv680->frame[vm->frame].grabstate = FRAME_READY;
1256
1257 if (!stv680->streaming)
1258 stv680_start_stream (stv680);
1259
1260 return 0;
1261 }
1262 case VIDIOCSYNC:{
1263 int *frame = arg;
1264 int ret = 0;
1265
1266 if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
1267 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
1268 return -EINVAL;
1269 }
1270 ret = stv680_newframe (stv680, *frame);
1271 stv680->frame[*frame].grabstate = FRAME_UNUSED;
1272 return ret;
1273 }
1274 case VIDIOCGFBUF:{
1275 struct video_buffer *vb = arg;
1276
1277 memset (vb, 0, sizeof (*vb));
1278 return 0;
1279 }
1280 case VIDIOCKEY:
1281 return 0;
1282 case VIDIOCCAPTURE:
1283 {
1284 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
1285 return -EINVAL;
1286 }
1287 case VIDIOCSFBUF:
1288 case VIDIOCGTUNER:
1289 case VIDIOCSTUNER:
1290 case VIDIOCGFREQ:
1291 case VIDIOCSFREQ:
1292 case VIDIOCGAUDIO:
1293 case VIDIOCSAUDIO:
1294 return -EINVAL;
1295 default:
1296 return -ENOIOCTLCMD;
1297 } /* end switch */
1298
1299 return 0;
1300 }
1301
1302 static int stv680_ioctl(struct inode *inode, struct file *file,
1303 unsigned int cmd, unsigned long arg)
1304 {
1305 return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl);
1306 }
1307
1308 static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
1309 {
1310 struct video_device *dev = file->private_data;
1311 struct usb_stv *stv680 = video_get_drvdata(dev);
1312 unsigned long start = vma->vm_start;
1313 unsigned long size = vma->vm_end-vma->vm_start;
1314 unsigned long page, pos;
1315
1316 mutex_lock(&stv680->lock);
1317
1318 if (stv680->udev == NULL) {
1319 mutex_unlock(&stv680->lock);
1320 return -EIO;
1321 }
1322 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
1323 & ~(PAGE_SIZE - 1))) {
1324 mutex_unlock(&stv680->lock);
1325 return -EINVAL;
1326 }
1327 pos = (unsigned long) stv680->fbuf;
1328 while (size > 0) {
1329 page = vmalloc_to_pfn((void *)pos);
1330 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1331 mutex_unlock(&stv680->lock);
1332 return -EAGAIN;
1333 }
1334 start += PAGE_SIZE;
1335 pos += PAGE_SIZE;
1336 if (size > PAGE_SIZE)
1337 size -= PAGE_SIZE;
1338 else
1339 size = 0;
1340 }
1341 mutex_unlock(&stv680->lock);
1342
1343 return 0;
1344 }
1345
1346 static ssize_t stv680_read (struct file *file, char __user *buf,
1347 size_t count, loff_t *ppos)
1348 {
1349 struct video_device *dev = file->private_data;
1350 unsigned long int realcount = count;
1351 int ret = 0;
1352 struct usb_stv *stv680 = video_get_drvdata(dev);
1353 unsigned long int i;
1354
1355 if (STV680_NUMFRAMES != 2) {
1356 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
1357 return -1;
1358 }
1359 if (stv680->udev == NULL)
1360 return -EIO;
1361 if (realcount > (stv680->vwidth * stv680->vheight * 3))
1362 realcount = stv680->vwidth * stv680->vheight * 3;
1363
1364 /* Shouldn't happen: */
1365 if (stv680->frame[0].grabstate == FRAME_GRABBING) {
1366 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
1367 return -EBUSY;
1368 }
1369 stv680->frame[0].grabstate = FRAME_READY;
1370 stv680->frame[1].grabstate = FRAME_UNUSED;
1371 stv680->curframe = 0;
1372
1373 if (!stv680->streaming)
1374 stv680_start_stream (stv680);
1375
1376 if (!stv680->streaming) {
1377 ret = stv680_newframe (stv680, 0); /* ret should = 0 */
1378 }
1379
1380 ret = stv680_newframe (stv680, 0);
1381
1382 if (!ret) {
1383 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
1384 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
1385 return -EFAULT;
1386 }
1387 } else {
1388 realcount = ret;
1389 }
1390 stv680->frame[0].grabstate = FRAME_UNUSED;
1391 return realcount;
1392 } /* stv680_read */
1393
1394 static const struct file_operations stv680_fops = {
1395 .owner = THIS_MODULE,
1396 .open = stv_open,
1397 .release = stv_close,
1398 .read = stv680_read,
1399 .mmap = stv680_mmap,
1400 .ioctl = stv680_ioctl,
1401 #ifdef CONFIG_COMPAT
1402 .compat_ioctl = v4l_compat_ioctl32,
1403 #endif
1404 .llseek = no_llseek,
1405 };
1406 static struct video_device stv680_template = {
1407 .name = "STV0680 USB camera",
1408 .fops = &stv680_fops,
1409 .release = video_device_release,
1410 .minor = -1,
1411 };
1412
1413 static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
1414 {
1415 struct usb_device *dev = interface_to_usbdev(intf);
1416 struct usb_host_interface *interface;
1417 struct usb_stv *stv680 = NULL;
1418 char *camera_name = NULL;
1419 int retval = 0;
1420
1421 /* We don't handle multi-config cameras */
1422 if (dev->descriptor.bNumConfigurations != 1) {
1423 PDEBUG (0, "STV(e): Number of Configurations != 1");
1424 return -ENODEV;
1425 }
1426
1427 interface = &intf->altsetting[0];
1428 /* Is it a STV680? */
1429 if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
1430 (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
1431 camera_name = "STV0680";
1432 PDEBUG (0, "STV(i): STV0680 camera found.");
1433 } else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) &&
1434 (le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) {
1435 camera_name = "Creative WebCam Go Mini";
1436 PDEBUG (0, "STV(i): Creative WebCam Go Mini found.");
1437 } else {
1438 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values.");
1439 PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer.");
1440 retval = -ENODEV;
1441 goto error;
1442 }
1443 /* We found one */
1444 if ((stv680 = kzalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
1445 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
1446 retval = -ENOMEM;
1447 goto error;
1448 }
1449
1450 stv680->udev = dev;
1451 stv680->camera_name = camera_name;
1452
1453 stv680->vdev = video_device_alloc();
1454 if (!stv680->vdev) {
1455 retval = -ENOMEM;
1456 goto error;
1457 }
1458 memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
1459 stv680->vdev->parent = &intf->dev;
1460 video_set_drvdata(stv680->vdev, stv680);
1461
1462 memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
1463 init_waitqueue_head (&stv680->wq);
1464 mutex_init (&stv680->lock);
1465 wmb ();
1466
1467 if (video_register_device(stv680->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1468 PDEBUG (0, "STV(e): video_register_device failed");
1469 retval = -EIO;
1470 goto error_vdev;
1471 }
1472 PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor);
1473
1474 usb_set_intfdata (intf, stv680);
1475 retval = stv680_create_sysfs_files(stv680->vdev);
1476 if (retval)
1477 goto error_unreg;
1478 return 0;
1479
1480 error_unreg:
1481 video_unregister_device(stv680->vdev);
1482 error_vdev:
1483 video_device_release(stv680->vdev);
1484 error:
1485 kfree(stv680);
1486 return retval;
1487 }
1488
1489 static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
1490 {
1491 int i;
1492
1493 stv680->udev = NULL;
1494 stv680->frame[0].grabstate = FRAME_ERROR;
1495 stv680->frame[1].grabstate = FRAME_ERROR;
1496 stv680->streaming = 0;
1497
1498 wake_up_interruptible (&stv680->wq);
1499
1500 for (i = 0; i < STV680_NUMSBUF; i++)
1501 if (stv680->urb[i]) {
1502 usb_kill_urb (stv680->urb[i]);
1503 usb_free_urb (stv680->urb[i]);
1504 stv680->urb[i] = NULL;
1505 kfree(stv680->sbuf[i].data);
1506 }
1507 for (i = 0; i < STV680_NUMSCRATCH; i++)
1508 kfree(stv680->scratch[i].data);
1509 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
1510
1511 /* Free the memory */
1512 kfree(stv680);
1513 }
1514
1515 static void stv680_disconnect (struct usb_interface *intf)
1516 {
1517 struct usb_stv *stv680 = usb_get_intfdata (intf);
1518
1519 usb_set_intfdata (intf, NULL);
1520
1521 if (stv680) {
1522 /* We don't want people trying to open up the device */
1523 if (stv680->vdev) {
1524 stv680_remove_sysfs_files(stv680->vdev);
1525 video_unregister_device(stv680->vdev);
1526 stv680->vdev = NULL;
1527 }
1528 if (!stv680->user) {
1529 usb_stv680_remove_disconnected (stv680);
1530 } else {
1531 stv680->removed = 1;
1532 }
1533 }
1534 }
1535
1536 static struct usb_driver stv680_driver = {
1537 .name = "stv680",
1538 .probe = stv680_probe,
1539 .disconnect = stv680_disconnect,
1540 .id_table = device_table
1541 };
1542
1543 /********************************************************************
1544 * Module routines
1545 ********************************************************************/
1546
1547 static int __init usb_stv680_init (void)
1548 {
1549 if (usb_register (&stv680_driver) < 0) {
1550 PDEBUG (0, "STV(e): Could not setup STV0680 driver");
1551 return -1;
1552 }
1553 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
1554
1555 info(DRIVER_DESC " " DRIVER_VERSION);
1556 return 0;
1557 }
1558
1559 static void __exit usb_stv680_exit (void)
1560 {
1561 usb_deregister (&stv680_driver);
1562 PDEBUG (0, "STV(i): driver deregistered");
1563 }
1564
1565 module_init (usb_stv680_init);
1566 module_exit (usb_stv680_exit);
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