?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[libata] pata_{legacy,sc1200,sl82c105}: add missing hooks
[linux-2.6/libata-dev.git] / drivers / media / video / stv680.c
blobbf3aa8d2d57e3ccc7ecdcbdf29b4e67e2e041aaa
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 <linux/usb.h>
70 #include <linux/mutex.h>
71
72 #include "stv680.h"
73
74 static int video_nr = -1;
75 static int swapRGB = 0; /* default for auto sleect */
76 static int swapRGB_on = 0; /* default to allow auto select; -1=swap never, +1= swap always */
77
78 static unsigned int debug = 0;
79
80 #define PDEBUG(level, fmt, args...) \
81 do { \
82 if (debug >= level) \
83 info("[%s:%d] " fmt, __FUNCTION__, __LINE__ , ## args); \
84 } while (0)
85
86
87 /*
88 * Version Information
89 */
90 #define DRIVER_VERSION "v0.25"
91 #define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
92 #define DRIVER_DESC "STV0680 USB Camera Driver"
93
94 MODULE_AUTHOR (DRIVER_AUTHOR);
95 MODULE_DESCRIPTION (DRIVER_DESC);
96 MODULE_LICENSE ("GPL");
97 module_param(debug, int, S_IRUGO | S_IWUSR);
98 MODULE_PARM_DESC (debug, "Debug enabled or not");
99 module_param(swapRGB_on, int, 0);
100 MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
101 module_param(video_nr, int, 0);
102
103 /********************************************************************
104 *
105 * Memory management
106 *
107 * This is a shameless copy from the USB-cpia driver (linux kernel
108 * version 2.3.29 or so, I have no idea what this code actually does ;).
109 * Actually it seems to be a copy of a shameless copy of the bttv-driver.
110 * Or that is a copy of a shameless copy of ... (To the powers: is there
111 * no generic kernel-function to do this sort of stuff?)
112 *
113 * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
114 * there will be one, but apparentely not yet -jerdfelt
115 *
116 * So I copied it again for the ov511 driver -claudio
117 *
118 * Same for the se401 driver -Jeroen
119 *
120 * And the STV0680 driver - Kevin
121 ********************************************************************/
122 static void *rvmalloc (unsigned long size)
123 {
124 void *mem;
125 unsigned long adr;
126
127 size = PAGE_ALIGN(size);
128 mem = vmalloc_32 (size);
129 if (!mem)
130 return NULL;
131
132 memset (mem, 0, size); /* Clear the ram out, no junk to the user */
133 adr = (unsigned long) mem;
134 while (size > 0) {
135 SetPageReserved(vmalloc_to_page((void *)adr));
136 adr += PAGE_SIZE;
137 size -= PAGE_SIZE;
138 }
139 return mem;
140 }
141
142 static void rvfree (void *mem, unsigned long size)
143 {
144 unsigned long adr;
145
146 if (!mem)
147 return;
148
149 adr = (unsigned long) mem;
150 while ((long) size > 0) {
151 ClearPageReserved(vmalloc_to_page((void *)adr));
152 adr += PAGE_SIZE;
153 size -= PAGE_SIZE;
154 }
155 vfree (mem);
156 }
157
158
159 /*********************************************************************
160 * pencam read/write functions
161 ********************************************************************/
162
163 static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
164 {
165 int ret = -1;
166
167 switch (set) {
168 case 0: /* 0xc1 */
169 ret = usb_control_msg (stv680->udev,
170 usb_rcvctrlpipe (stv680->udev, 0),
171 req,
172 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
173 value, 0, buffer, size, PENCAM_TIMEOUT);
174 break;
175
176 case 1: /* 0x41 */
177 ret = usb_control_msg (stv680->udev,
178 usb_sndctrlpipe (stv680->udev, 0),
179 req,
180 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
181 value, 0, buffer, size, PENCAM_TIMEOUT);
182 break;
183
184 case 2: /* 0x80 */
185 ret = usb_control_msg (stv680->udev,
186 usb_rcvctrlpipe (stv680->udev, 0),
187 req,
188 (USB_DIR_IN | USB_RECIP_DEVICE),
189 value, 0, buffer, size, PENCAM_TIMEOUT);
190 break;
191
192 case 3: /* 0x40 */
193 ret = usb_control_msg (stv680->udev,
194 usb_sndctrlpipe (stv680->udev, 0),
195 req,
196 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
197 value, 0, buffer, size, PENCAM_TIMEOUT);
198 break;
199
200 }
201 if ((ret < 0) && (req != 0x0a)) {
202 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
203 }
204 return ret;
205 }
206
207 static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
208 {
209
210 if (configuration != dev->udev->actconfig->desc.bConfigurationValue
211 || usb_reset_configuration (dev->udev) < 0) {
212 PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
213 return -1;
214 }
215 if (usb_set_interface (dev->udev, interface, alternate) < 0) {
216 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
217 return -1;
218 }
219 return 0;
220 }
221
222 static int stv_stop_video (struct usb_stv *dev)
223 {
224 int i;
225 unsigned char *buf;
226
227 buf = kmalloc (40, GFP_KERNEL);
228 if (buf == NULL) {
229 PDEBUG (0, "STV(e): Out of (small buf) memory");
230 return -1;
231 }
232
233 /* this is a high priority command; it stops all lower order commands */
234 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
235 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
236 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
237 } else {
238 PDEBUG (1, "STV(i): Camera reset to idle mode.");
239 }
240
241 if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
242 PDEBUG (1, "STV(e): Reset config during exit failed");
243
244 /* get current mode */
245 buf[0] = 0xf0;
246 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
247 PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
248 if (dev->origMode != buf[0]) {
249 memset (buf, 0, 8);
250 buf[0] = (unsigned char) dev->origMode;
251 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
252 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
253 i = -1;
254 }
255 buf[0] = 0xf0;
256 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
257 if ((i != 0x08) || (buf[0] != dev->origMode)) {
258 PDEBUG (0, "STV(e): camera NOT set to original resolution.");
259 i = -1;
260 } else
261 PDEBUG (0, "STV(i): Camera set to original resolution");
262 }
263 /* origMode */
264 kfree(buf);
265 return i;
266 }
267
268 static int stv_set_video_mode (struct usb_stv *dev)
269 {
270 int i, stop_video = 1;
271 unsigned char *buf;
272
273 buf = kmalloc (40, GFP_KERNEL);
274 if (buf == NULL) {
275 PDEBUG (0, "STV(e): Out of (small buf) memory");
276 return -1;
277 }
278
279 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
280 kfree(buf);
281 return i;
282 }
283
284 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
285 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
286 PDEBUG (1, "STV(e): Could not get descriptor 0100.");
287 goto error;
288 }
289
290 /* set alternate interface 1 */
291 if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
292 goto error;
293
294 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
295 goto error;
296 PDEBUG (1, "STV(i): Setting video mode.");
297 /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
298 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
299 stop_video = 0;
300 goto error;
301 }
302 goto exit;
303
304 error:
305 kfree(buf);
306 if (stop_video == 1)
307 stv_stop_video (dev);
308 return -1;
309
310 exit:
311 kfree(buf);
312 return 0;
313 }
314
315 static int stv_init (struct usb_stv *stv680)
316 {
317 int i = 0;
318 unsigned char *buffer;
319 unsigned long int bufsize;
320
321 buffer = kzalloc (40, GFP_KERNEL);
322 if (buffer == NULL) {
323 PDEBUG (0, "STV(e): Out of (small buf) memory");
324 return -1;
325 }
326 udelay (100);
327
328 /* set config 1, interface 0, alternate 0 */
329 if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
330 kfree(buffer);
331 PDEBUG (0, "STV(e): set config 1,0,0 failed");
332 return -1;
333 }
334 /* ping camera to be sure STV0680 is present */
335 if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
336 goto error;
337 if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
338 PDEBUG (1, "STV(e): camera ping failed!!");
339 goto error;
340 }
341
342 /* get camera descriptor */
343 if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
344 goto error;
345 i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
346 if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
347 PDEBUG (1, "STV(e): Could not get descriptor 0200.");
348 goto error;
349 }
350 if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
351 goto error;
352 if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
353 goto error;
354 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
355 goto error;
356
357 stv680->SupportedModes = buffer[7];
358 i = stv680->SupportedModes;
359 stv680->CIF = 0;
360 stv680->VGA = 0;
361 stv680->QVGA = 0;
362 if (i & 1)
363 stv680->CIF = 1;
364 if (i & 2)
365 stv680->VGA = 1;
366 if (i & 8)
367 stv680->QVGA = 1;
368 if (stv680->SupportedModes == 0) {
369 PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
370 i = -1;
371 goto error;
372 } else {
373 if (stv680->CIF)
374 PDEBUG (0, "STV(i): CIF is supported");
375 if (stv680->QVGA)
376 PDEBUG (0, "STV(i): QVGA is supported");
377 }
378 /* FW rev, ASIC rev, sensor ID */
379 PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
380 PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
381 PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
382
383 /* set alternate interface 1 */
384 if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
385 goto error;
386
387 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
388 goto error;
389 if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
390 goto error;
391 i = buffer[3];
392 PDEBUG (0, "STV(i): Camera has %i pictures.", i);
393
394 /* get current mode */
395 if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
396 goto error;
397 stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
398
399 /* This will attemp CIF mode, if supported. If not, set to QVGA */
400 memset (buffer, 0, 8);
401 if (stv680->CIF)
402 buffer[0] = 0x00;
403 else if (stv680->QVGA)
404 buffer[0] = 0x03;
405 if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
406 PDEBUG (0, "STV(i): Set_Camera_Mode failed");
407 i = -1;
408 goto error;
409 }
410 buffer[0] = 0xf0;
411 stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
412 if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
413 PDEBUG (0, "STV(e): Error setting camera video mode!");
414 i = -1;
415 goto error;
416 } else {
417 if (buffer[0] == 0) {
418 stv680->VideoMode = 0x0000;
419 PDEBUG (0, "STV(i): Video Mode set to CIF");
420 }
421 if (buffer[0] == 0x03) {
422 stv680->VideoMode = 0x0300;
423 PDEBUG (0, "STV(i): Video Mode set to QVGA");
424 }
425 }
426 if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
427 goto error;
428 bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
429 stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */
430 stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */
431 stv680->origGain = buffer[12];
432
433 goto exit;
434
435 error:
436 i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */
437 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
438 kfree(buffer);
439 return -1;
440
441 exit:
442 kfree(buffer);
443
444 /* video = 320x240, 352x288 */
445 if (stv680->CIF == 1) {
446 stv680->maxwidth = 352;
447 stv680->maxheight = 288;
448 stv680->vwidth = 352;
449 stv680->vheight = 288;
450 }
451 if (stv680->QVGA == 1) {
452 stv680->maxwidth = 320;
453 stv680->maxheight = 240;
454 stv680->vwidth = 320;
455 stv680->vheight = 240;
456 }
457
458 stv680->rawbufsize = bufsize; /* must be ./. by 8 */
459 stv680->maxframesize = bufsize * 3; /* RGB size */
460 PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
461 PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
462
463 /* some default values */
464 stv680->bulk_in_endpointAddr = 0x82;
465 stv680->dropped = 0;
466 stv680->error = 0;
467 stv680->framecount = 0;
468 stv680->readcount = 0;
469 stv680->streaming = 0;
470 /* bright, white, colour, hue, contrast are set by software, not in stv0680 */
471 stv680->brightness = 32767;
472 stv680->chgbright = 0;
473 stv680->whiteness = 0; /* only for greyscale */
474 stv680->colour = 32767;
475 stv680->contrast = 32767;
476 stv680->hue = 32767;
477 stv680->palette = STV_VIDEO_PALETTE;
478 stv680->depth = 24; /* rgb24 bits */
479 if ((swapRGB_on == 0) && (swapRGB == 0))
480 PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
481 else if ((swapRGB_on == 0) && (swapRGB == 1))
482 PDEBUG (1, "STV(i): swapRGB is (auto) ON");
483 else if (swapRGB_on == 1)
484 PDEBUG (1, "STV(i): swapRGB is (forced) ON");
485 else if (swapRGB_on == -1)
486 PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
487
488 if (stv_set_video_mode (stv680) < 0) {
489 PDEBUG (0, "STV(e): Could not set video mode in stv_init");
490 return -1;
491 }
492
493 return 0;
494 }
495
496 /***************** last of pencam routines *******************/
497
498 /****************************************************************************
499 * sysfs
500 ***************************************************************************/
501 #define stv680_file(name, variable, field) \
502 static ssize_t show_##name(struct class_device *class_dev, char *buf) \
503 { \
504 struct video_device *vdev = to_video_device(class_dev); \
505 struct usb_stv *stv = video_get_drvdata(vdev); \
506 return sprintf(buf, field, stv->variable); \
507 } \
508 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
509
510 stv680_file(model, camera_name, "%s\n");
511 stv680_file(in_use, user, "%d\n");
512 stv680_file(streaming, streaming, "%d\n");
513 stv680_file(palette, palette, "%i\n");
514 stv680_file(frames_total, readcount, "%d\n");
515 stv680_file(frames_read, framecount, "%d\n");
516 stv680_file(packets_dropped, dropped, "%d\n");
517 stv680_file(decoding_errors, error, "%d\n");
518
519 static int stv680_create_sysfs_files(struct video_device *vdev)
520 {
521 int rc;
522
523 rc = video_device_create_file(vdev, &class_device_attr_model);
524 if (rc) goto err;
525 rc = video_device_create_file(vdev, &class_device_attr_in_use);
526 if (rc) goto err_model;
527 rc = video_device_create_file(vdev, &class_device_attr_streaming);
528 if (rc) goto err_inuse;
529 rc = video_device_create_file(vdev, &class_device_attr_palette);
530 if (rc) goto err_stream;
531 rc = video_device_create_file(vdev, &class_device_attr_frames_total);
532 if (rc) goto err_pal;
533 rc = video_device_create_file(vdev, &class_device_attr_frames_read);
534 if (rc) goto err_framtot;
535 rc = video_device_create_file(vdev, &class_device_attr_packets_dropped);
536 if (rc) goto err_framread;
537 rc = video_device_create_file(vdev, &class_device_attr_decoding_errors);
538 if (rc) goto err_dropped;
539
540 return 0;
541
542 err_dropped:
543 video_device_remove_file(vdev, &class_device_attr_packets_dropped);
544 err_framread:
545 video_device_remove_file(vdev, &class_device_attr_frames_read);
546 err_framtot:
547 video_device_remove_file(vdev, &class_device_attr_frames_total);
548 err_pal:
549 video_device_remove_file(vdev, &class_device_attr_palette);
550 err_stream:
551 video_device_remove_file(vdev, &class_device_attr_streaming);
552 err_inuse:
553 video_device_remove_file(vdev, &class_device_attr_in_use);
554 err_model:
555 video_device_remove_file(vdev, &class_device_attr_model);
556 err:
557 return rc;
558 }
559
560 static void stv680_remove_sysfs_files(struct video_device *vdev)
561 {
562 video_device_remove_file(vdev, &class_device_attr_model);
563 video_device_remove_file(vdev, &class_device_attr_in_use);
564 video_device_remove_file(vdev, &class_device_attr_streaming);
565 video_device_remove_file(vdev, &class_device_attr_palette);
566 video_device_remove_file(vdev, &class_device_attr_frames_total);
567 video_device_remove_file(vdev, &class_device_attr_frames_read);
568 video_device_remove_file(vdev, &class_device_attr_packets_dropped);
569 video_device_remove_file(vdev, &class_device_attr_decoding_errors);
570 }
571
572 /********************************************************************
573 * Camera control
574 *******************************************************************/
575
576 static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
577 {
578 /* This sets values for v4l interface. max/min = 65535/0 */
579
580 p->brightness = stv680->brightness;
581 p->whiteness = stv680->whiteness; /* greyscale */
582 p->colour = stv680->colour;
583 p->contrast = stv680->contrast;
584 p->hue = stv680->hue;
585 p->palette = stv680->palette;
586 p->depth = stv680->depth;
587 return 0;
588 }
589
590 static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
591 {
592 /* See above stv680_get_pict */
593
594 if (p->palette != STV_VIDEO_PALETTE) {
595 PDEBUG (2, "STV(e): Palette set error in _set_pic");
596 return 1;
597 }
598
599 if (stv680->brightness != p->brightness) {
600 stv680->chgbright = 1;
601 stv680->brightness = p->brightness;
602 }
603
604 stv680->whiteness = p->whiteness; /* greyscale */
605 stv680->colour = p->colour;
606 stv680->contrast = p->contrast;
607 stv680->hue = p->hue;
608 stv680->palette = p->palette;
609 stv680->depth = p->depth;
610
611 return 0;
612 }
613
614 static void stv680_video_irq (struct urb *urb)
615 {
616 struct usb_stv *stv680 = urb->context;
617 int length = urb->actual_length;
618
619 if (length < stv680->rawbufsize)
620 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
621
622 /* ohoh... */
623 if (!stv680->streaming)
624 return;
625
626 if (!stv680->udev) {
627 PDEBUG (0, "STV(e): device vapourished in video_irq");
628 return;
629 }
630
631 /* 0 sized packets happen if we are to fast, but sometimes the camera
632 keeps sending them forever...
633 */
634 if (length && !urb->status) {
635 stv680->nullpackets = 0;
636 switch (stv680->scratch[stv680->scratch_next].state) {
637 case BUFFER_READY:
638 case BUFFER_BUSY:
639 stv680->dropped++;
640 break;
641
642 case BUFFER_UNUSED:
643 memcpy (stv680->scratch[stv680->scratch_next].data,
644 (unsigned char *) urb->transfer_buffer, length);
645 stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
646 stv680->scratch[stv680->scratch_next].length = length;
647 if (waitqueue_active (&stv680->wq)) {
648 wake_up_interruptible (&stv680->wq);
649 }
650 stv680->scratch_overflow = 0;
651 stv680->scratch_next++;
652 if (stv680->scratch_next >= STV680_NUMSCRATCH)
653 stv680->scratch_next = 0;
654 break;
655 } /* switch */
656 } else {
657 stv680->nullpackets++;
658 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
659 if (waitqueue_active (&stv680->wq)) {
660 wake_up_interruptible (&stv680->wq);
661 }
662 }
663 } /* if - else */
664
665 /* Resubmit urb for new data */
666 urb->status = 0;
667 urb->dev = stv680->udev;
668 if (usb_submit_urb (urb, GFP_ATOMIC))
669 PDEBUG (0, "STV(e): urb burned down in video irq");
670 return;
671 } /* _video_irq */
672
673 static int stv680_start_stream (struct usb_stv *stv680)
674 {
675 struct urb *urb;
676 int err = 0, i;
677
678 stv680->streaming = 1;
679
680 /* Do some memory allocation */
681 for (i = 0; i < STV680_NUMFRAMES; i++) {
682 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
683 stv680->frame[i].curpix = 0;
684 }
685 /* packet size = 4096 */
686 for (i = 0; i < STV680_NUMSBUF; i++) {
687 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
688 if (stv680->sbuf[i].data == NULL) {
689 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
690 goto nomem_err;
691 }
692 }
693
694 stv680->scratch_next = 0;
695 stv680->scratch_use = 0;
696 stv680->scratch_overflow = 0;
697 for (i = 0; i < STV680_NUMSCRATCH; i++) {
698 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
699 if (stv680->scratch[i].data == NULL) {
700 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
701 goto nomem_err;
702 }
703 stv680->scratch[i].state = BUFFER_UNUSED;
704 }
705
706 for (i = 0; i < STV680_NUMSBUF; i++) {
707 urb = usb_alloc_urb (0, GFP_KERNEL);
708 if (!urb)
709 goto nomem_err;
710
711 /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
712 usb_fill_bulk_urb (urb, stv680->udev,
713 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
714 stv680->sbuf[i].data, stv680->rawbufsize,
715 stv680_video_irq, stv680);
716 stv680->urb[i] = urb;
717 err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
718 if (err)
719 PDEBUG (0, "STV(e): urb burned down in start stream");
720 } /* i STV680_NUMSBUF */
721
722 stv680->framecount = 0;
723 return 0;
724
725 nomem_err:
726 for (i = 0; i < STV680_NUMSCRATCH; i++) {
727 kfree(stv680->scratch[i].data);
728 stv680->scratch[i].data = NULL;
729 }
730 for (i = 0; i < STV680_NUMSBUF; i++) {
731 usb_kill_urb(stv680->urb[i]);
732 usb_free_urb(stv680->urb[i]);
733 stv680->urb[i] = NULL;
734 kfree(stv680->sbuf[i].data);
735 stv680->sbuf[i].data = NULL;
736 }
737 return -ENOMEM;
738
739 }
740
741 static int stv680_stop_stream (struct usb_stv *stv680)
742 {
743 int i;
744
745 if (!stv680->streaming || !stv680->udev)
746 return 1;
747
748 stv680->streaming = 0;
749
750 for (i = 0; i < STV680_NUMSBUF; i++)
751 if (stv680->urb[i]) {
752 usb_kill_urb (stv680->urb[i]);
753 usb_free_urb (stv680->urb[i]);
754 stv680->urb[i] = NULL;
755 kfree(stv680->sbuf[i].data);
756 }
757 for (i = 0; i < STV680_NUMSCRATCH; i++) {
758 kfree(stv680->scratch[i].data);
759 stv680->scratch[i].data = NULL;
760 }
761
762 return 0;
763 }
764
765 static int stv680_set_size (struct usb_stv *stv680, int width, int height)
766 {
767 int wasstreaming = stv680->streaming;
768
769 /* Check to see if we need to change */
770 if ((stv680->vwidth == width) && (stv680->vheight == height))
771 return 0;
772
773 PDEBUG (1, "STV(i): size request for %i x %i", width, height);
774 /* Check for a valid mode */
775 if ((!width || !height) || ((width & 1) || (height & 1))) {
776 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);
777 return 1;
778 }
779
780 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
781 width = stv680->maxwidth / 2;
782 height = stv680->maxheight / 2;
783 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
784 width = 160;
785 height = 120;
786 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
787 width = 176;
788 height = 144;
789 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
790 width = 320;
791 height = 240;
792 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
793 width = 352;
794 height = 288;
795 } else {
796 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);
797 return 1;
798 }
799
800 /* Stop a current stream and start it again at the new size */
801 if (wasstreaming)
802 stv680_stop_stream (stv680);
803 stv680->vwidth = width;
804 stv680->vheight = height;
805 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
806 if (wasstreaming)
807 stv680_start_stream (stv680);
808
809 return 0;
810 }
811
812 /**********************************************************************
813 * Video Decoding
814 **********************************************************************/
815
816 /******* routines from the pencam program; hey, they work! ********/
817
818 /*
819 * STV0680 Vision Camera Chipset Driver
820 * Copyright (C) 2000 Adam Harrison <adam@antispin.org>
821 */
822
823 #define RED 0
824 #define GREEN 1
825 #define BLUE 2
826 #define AD(x, y, w) (((y)*(w)+(x))*3)
827
828 static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
829 {
830 int x, y, i;
831 int w = stv680->cwidth;
832 int vw = stv680->cwidth, vh = stv680->cheight;
833 unsigned int p = 0;
834 int colour = 0, bayer = 0;
835 unsigned char *raw = buffer->data;
836 struct stv680_frame *frame = &stv680->frame[stv680->curframe];
837 unsigned char *output = frame->data;
838 unsigned char *temp = frame->data;
839 int offset = buffer->offset;
840
841 if (frame->curpix == 0) {
842 if (frame->grabstate == FRAME_READY) {
843 frame->grabstate = FRAME_GRABBING;
844 }
845 }
846 if (offset != frame->curpix) { /* Regard frame as lost :( */
847 frame->curpix = 0;
848 stv680->error++;
849 return;
850 }
851
852 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
853 vw = 320;
854 vh = 240;
855 }
856 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
857 vw = 352;
858 vh = 288;
859 }
860
861 memset (output, 0, 3 * vw * vh); /* clear output matrix. */
862
863 for (y = 0; y < vh; y++) {
864 for (x = 0; x < vw; x++) {
865 if (x & 1)
866 p = *(raw + y * w + (x >> 1));
867 else
868 p = *(raw + y * w + (x >> 1) + (w >> 1));
869
870 if (y & 1)
871 bayer = 2;
872 else
873 bayer = 0;
874 if (x & 1)
875 bayer++;
876
877 switch (bayer) {
878 case 0:
879 case 3:
880 colour = 1;
881 break;
882 case 1:
883 colour = 0;
884 break;
885 case 2:
886 colour = 2;
887 break;
888 }
889 i = (y * vw + x) * 3;
890 *(output + i + colour) = (unsigned char) p;
891 } /* for x */
892
893 } /* for y */
894
895 /****** gamma correction plus hardcoded white balance */
896 /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
897 Correction values red[], green[], blue[], are generated by
898 (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
899 White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
900 converted to unsigned char. Values are in stv680.h */
901
902 for (y = 0; y < vh; y++) {
903 for (x = 0; x < vw; x++) {
904 i = (y * vw + x) * 3;
905 *(output + i) = red[*(output + i)];
906 *(output + i + 1) = green[*(output + i + 1)];
907 *(output + i + 2) = blue[*(output + i + 2)];
908 }
909 }
910
911 /****** bayer demosaic ******/
912 for (y = 1; y < (vh - 1); y++) {
913 for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
914 if (y & 1)
915 bayer = 0;
916 else
917 bayer = 2;
918 if (!(x & 1))
919 bayer++;
920
921 switch (bayer) {
922 case 0: /* green. blue lr, red tb */
923 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
924 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
925 break;
926
927 case 1: /* blue. green lrtb, red diagonals */
928 *(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;
929 *(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;
930 break;
931
932 case 2: /* red. green lrtb, blue diagonals */
933 *(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;
934 *(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;
935 break;
936
937 case 3: /* green. red lr, blue tb */
938 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
939 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
940 break;
941 } /* switch */
942 } /* for x */
943 } /* for y - end demosaic */
944
945 /* fix top and bottom row, left and right side */
946 i = vw * 3;
947 memcpy (output, (output + i), i);
948 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
949 for (y = 0; y < vh; y++) {
950 i = y * vw * 3;
951 memcpy ((output + i), (output + i + 3), 3);
952 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
953 }
954
955 /* process all raw data, then trim to size if necessary */
956 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
957 i = 0;
958 for (y = 0; y < vh; y++) {
959 if (!(y & 1)) {
960 for (x = 0; x < vw; x++) {
961 p = (y * vw + x) * 3;
962 if (!(x & 1)) {
963 *(output + i) = *(output + p);
964 *(output + i + 1) = *(output + p + 1);
965 *(output + i + 2) = *(output + p + 2);
966 i += 3;
967 }
968 } /* for x */
969 }
970 } /* for y */
971 }
972 /* reset to proper width */
973 if ((stv680->vwidth == 160)) {
974 vw = 160;
975 vh = 120;
976 }
977 if ((stv680->vwidth == 176)) {
978 vw = 176;
979 vh = 144;
980 }
981
982 /* output is RGB; some programs want BGR */
983 /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
984 /* swapRGB_on=-1, never swap */
985 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
986 for (y = 0; y < vh; y++) {
987 for (x = 0; x < vw; x++) {
988 i = (y * vw + x) * 3;
989 *(temp) = *(output + i);
990 *(output + i) = *(output + i + 2);
991 *(output + i + 2) = *(temp);
992 }
993 }
994 }
995 /* brightness */
996 if (stv680->chgbright == 1) {
997 if (stv680->brightness >= 32767) {
998 p = (stv680->brightness - 32767) / 256;
999 for (x = 0; x < (vw * vh * 3); x++) {
1000 if ((*(output + x) + (unsigned char) p) > 255)
1001 *(output + x) = 255;
1002 else
1003 *(output + x) += (unsigned char) p;
1004 } /* for */
1005 } else {
1006 p = (32767 - stv680->brightness) / 256;
1007 for (x = 0; x < (vw * vh * 3); x++) {
1008 if ((unsigned char) p > *(output + x))
1009 *(output + x) = 0;
1010 else
1011 *(output + x) -= (unsigned char) p;
1012 } /* for */
1013 } /* else */
1014 }
1015 /* if */
1016 frame->curpix = 0;
1017 frame->curlinepix = 0;
1018 frame->grabstate = FRAME_DONE;
1019 stv680->framecount++;
1020 stv680->readcount++;
1021 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
1022 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
1023 }
1024
1025 } /* bayer_unshuffle */
1026
1027 /******* end routines from the pencam program *********/
1028
1029 static int stv680_newframe (struct usb_stv *stv680, int framenr)
1030 {
1031 int errors = 0;
1032
1033 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
1034 if (!stv680->frame[framenr].curpix) {
1035 errors++;
1036 }
1037 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
1038
1039 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
1040 stv680->nullpackets = 0;
1041 PDEBUG (2, "STV(i): too many null length packets, restarting capture");
1042 stv680_stop_stream (stv680);
1043 stv680_start_stream (stv680);
1044 } else {
1045 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
1046 stv680->frame[framenr].grabstate = FRAME_ERROR;
1047 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
1048 return -EIO;
1049 }
1050 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
1051
1052 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
1053
1054 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
1055 stv680->scratch_use++;
1056 if (stv680->scratch_use >= STV680_NUMSCRATCH)
1057 stv680->scratch_use = 0;
1058 if (errors > STV680_MAX_ERRORS) {
1059 errors = 0;
1060 PDEBUG (2, "STV(i): too many errors, restarting capture");
1061 stv680_stop_stream (stv680);
1062 stv680_start_stream (stv680);
1063 }
1064 } /* else */
1065 } /* while */
1066 return 0;
1067 }
1068
1069 /*********************************************************************
1070 * Video4Linux
1071 *********************************************************************/
1072
1073 static int stv_open (struct inode *inode, struct file *file)
1074 {
1075 struct video_device *dev = video_devdata(file);
1076 struct usb_stv *stv680 = video_get_drvdata(dev);
1077 int err = 0;
1078
1079 /* we are called with the BKL held */
1080 stv680->user = 1;
1081 err = stv_init (stv680); /* main initialization routine for camera */
1082
1083 if (err >= 0) {
1084 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
1085 if (!stv680->fbuf) {
1086 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
1087 err = -ENOMEM;
1088 }
1089 file->private_data = dev;
1090 }
1091 if (err)
1092 stv680->user = 0;
1093
1094 return err;
1095 }
1096
1097 static int stv_close (struct inode *inode, struct file *file)
1098 {
1099 struct video_device *dev = file->private_data;
1100 struct usb_stv *stv680 = video_get_drvdata(dev);
1101 int i;
1102
1103 for (i = 0; i < STV680_NUMFRAMES; i++)
1104 stv680->frame[i].grabstate = FRAME_UNUSED;
1105 if (stv680->streaming)
1106 stv680_stop_stream (stv680);
1107
1108 if ((i = stv_stop_video (stv680)) < 0)
1109 PDEBUG (1, "STV(e): stop_video failed in stv_close");
1110
1111 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
1112 stv680->user = 0;
1113
1114 if (stv680->removed) {
1115 kfree(stv680);
1116 stv680 = NULL;
1117 PDEBUG (0, "STV(i): device unregistered");
1118 }
1119 file->private_data = NULL;
1120 return 0;
1121 }
1122
1123 static int stv680_do_ioctl (struct inode *inode, struct file *file,
1124 unsigned int cmd, void *arg)
1125 {
1126 struct video_device *vdev = file->private_data;
1127 struct usb_stv *stv680 = video_get_drvdata(vdev);
1128
1129 if (!stv680->udev)
1130 return -EIO;
1131
1132 switch (cmd) {
1133 case VIDIOCGCAP:{
1134 struct video_capability *b = arg;
1135
1136 strcpy (b->name, stv680->camera_name);
1137 b->type = VID_TYPE_CAPTURE;
1138 b->channels = 1;
1139 b->audios = 0;
1140 b->maxwidth = stv680->maxwidth;
1141 b->maxheight = stv680->maxheight;
1142 b->minwidth = stv680->maxwidth / 2;
1143 b->minheight = stv680->maxheight / 2;
1144 return 0;
1145 }
1146 case VIDIOCGCHAN:{
1147 struct video_channel *v = arg;
1148
1149 if (v->channel != 0)
1150 return -EINVAL;
1151 v->flags = 0;
1152 v->tuners = 0;
1153 v->type = VIDEO_TYPE_CAMERA;
1154 strcpy (v->name, "STV Camera");
1155 return 0;
1156 }
1157 case VIDIOCSCHAN:{
1158 struct video_channel *v = arg;
1159 if (v->channel != 0)
1160 return -EINVAL;
1161 return 0;
1162 }
1163 case VIDIOCGPICT:{
1164 struct video_picture *p = arg;
1165
1166 stv680_get_pict (stv680, p);
1167 return 0;
1168 }
1169 case VIDIOCSPICT:{
1170 struct video_picture *p = arg;
1171
1172 if (stv680_set_pict (stv680, p))
1173 return -EINVAL;
1174 return 0;
1175 }
1176 case VIDIOCSWIN:{
1177 struct video_window *vw = arg;
1178
1179 if (vw->flags)
1180 return -EINVAL;
1181 if (vw->clipcount)
1182 return -EINVAL;
1183 if (vw->width != stv680->vwidth) {
1184 if (stv680_set_size (stv680, vw->width, vw->height)) {
1185 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
1186 return -EINVAL;
1187 }
1188 }
1189 return 0;
1190 }
1191 case VIDIOCGWIN:{
1192 struct video_window *vw = arg;
1193
1194 vw->x = 0; /* FIXME */
1195 vw->y = 0;
1196 vw->chromakey = 0;
1197 vw->flags = 0;
1198 vw->clipcount = 0;
1199 vw->width = stv680->vwidth;
1200 vw->height = stv680->vheight;
1201 return 0;
1202 }
1203 case VIDIOCGMBUF:{
1204 struct video_mbuf *vm = arg;
1205 int i;
1206
1207 memset (vm, 0, sizeof (*vm));
1208 vm->size = STV680_NUMFRAMES * stv680->maxframesize;
1209 vm->frames = STV680_NUMFRAMES;
1210 for (i = 0; i < STV680_NUMFRAMES; i++)
1211 vm->offsets[i] = stv680->maxframesize * i;
1212 return 0;
1213 }
1214 case VIDIOCMCAPTURE:{
1215 struct video_mmap *vm = arg;
1216
1217 if (vm->format != STV_VIDEO_PALETTE) {
1218 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
1219 vm->format, STV_VIDEO_PALETTE);
1220 if ((vm->format == 3) && (swapRGB_on == 0)) {
1221 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
1222 /* this may fix those apps (e.g., xawtv) that want BGR */
1223 swapRGB = 1;
1224 }
1225 return -EINVAL;
1226 }
1227 if (vm->frame >= STV680_NUMFRAMES) {
1228 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
1229 return -EINVAL;
1230 }
1231 if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
1232 || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
1233 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
1234 stv680->frame[vm->frame].grabstate);
1235 return -EBUSY;
1236 }
1237 /* Is this according to the v4l spec??? */
1238 if (stv680->vwidth != vm->width) {
1239 if (stv680_set_size (stv680, vm->width, vm->height)) {
1240 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
1241 return -EINVAL;
1242 }
1243 }
1244 stv680->frame[vm->frame].grabstate = FRAME_READY;
1245
1246 if (!stv680->streaming)
1247 stv680_start_stream (stv680);
1248
1249 return 0;
1250 }
1251 case VIDIOCSYNC:{
1252 int *frame = arg;
1253 int ret = 0;
1254
1255 if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
1256 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
1257 return -EINVAL;
1258 }
1259 ret = stv680_newframe (stv680, *frame);
1260 stv680->frame[*frame].grabstate = FRAME_UNUSED;
1261 return ret;
1262 }
1263 case VIDIOCGFBUF:{
1264 struct video_buffer *vb = arg;
1265
1266 memset (vb, 0, sizeof (*vb));
1267 return 0;
1268 }
1269 case VIDIOCKEY:
1270 return 0;
1271 case VIDIOCCAPTURE:
1272 {
1273 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
1274 return -EINVAL;
1275 }
1276 case VIDIOCSFBUF:
1277 case VIDIOCGTUNER:
1278 case VIDIOCSTUNER:
1279 case VIDIOCGFREQ:
1280 case VIDIOCSFREQ:
1281 case VIDIOCGAUDIO:
1282 case VIDIOCSAUDIO:
1283 return -EINVAL;
1284 default:
1285 return -ENOIOCTLCMD;
1286 } /* end switch */
1287
1288 return 0;
1289 }
1290
1291 static int stv680_ioctl(struct inode *inode, struct file *file,
1292 unsigned int cmd, unsigned long arg)
1293 {
1294 return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl);
1295 }
1296
1297 static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
1298 {
1299 struct video_device *dev = file->private_data;
1300 struct usb_stv *stv680 = video_get_drvdata(dev);
1301 unsigned long start = vma->vm_start;
1302 unsigned long size = vma->vm_end-vma->vm_start;
1303 unsigned long page, pos;
1304
1305 mutex_lock(&stv680->lock);
1306
1307 if (stv680->udev == NULL) {
1308 mutex_unlock(&stv680->lock);
1309 return -EIO;
1310 }
1311 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
1312 & ~(PAGE_SIZE - 1))) {
1313 mutex_unlock(&stv680->lock);
1314 return -EINVAL;
1315 }
1316 pos = (unsigned long) stv680->fbuf;
1317 while (size > 0) {
1318 page = vmalloc_to_pfn((void *)pos);
1319 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1320 mutex_unlock(&stv680->lock);
1321 return -EAGAIN;
1322 }
1323 start += PAGE_SIZE;
1324 pos += PAGE_SIZE;
1325 if (size > PAGE_SIZE)
1326 size -= PAGE_SIZE;
1327 else
1328 size = 0;
1329 }
1330 mutex_unlock(&stv680->lock);
1331
1332 return 0;
1333 }
1334
1335 static ssize_t stv680_read (struct file *file, char __user *buf,
1336 size_t count, loff_t *ppos)
1337 {
1338 struct video_device *dev = file->private_data;
1339 unsigned long int realcount = count;
1340 int ret = 0;
1341 struct usb_stv *stv680 = video_get_drvdata(dev);
1342 unsigned long int i;
1343
1344 if (STV680_NUMFRAMES != 2) {
1345 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
1346 return -1;
1347 }
1348 if (stv680->udev == NULL)
1349 return -EIO;
1350 if (realcount > (stv680->vwidth * stv680->vheight * 3))
1351 realcount = stv680->vwidth * stv680->vheight * 3;
1352
1353 /* Shouldn't happen: */
1354 if (stv680->frame[0].grabstate == FRAME_GRABBING) {
1355 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
1356 return -EBUSY;
1357 }
1358 stv680->frame[0].grabstate = FRAME_READY;
1359 stv680->frame[1].grabstate = FRAME_UNUSED;
1360 stv680->curframe = 0;
1361
1362 if (!stv680->streaming)
1363 stv680_start_stream (stv680);
1364
1365 if (!stv680->streaming) {
1366 ret = stv680_newframe (stv680, 0); /* ret should = 0 */
1367 }
1368
1369 ret = stv680_newframe (stv680, 0);
1370
1371 if (!ret) {
1372 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
1373 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
1374 return -EFAULT;
1375 }
1376 } else {
1377 realcount = ret;
1378 }
1379 stv680->frame[0].grabstate = FRAME_UNUSED;
1380 return realcount;
1381 } /* stv680_read */
1382
1383 static const struct file_operations stv680_fops = {
1384 .owner = THIS_MODULE,
1385 .open = stv_open,
1386 .release = stv_close,
1387 .read = stv680_read,
1388 .mmap = stv680_mmap,
1389 .ioctl = stv680_ioctl,
1390 .compat_ioctl = v4l_compat_ioctl32,
1391 .llseek = no_llseek,
1392 };
1393 static struct video_device stv680_template = {
1394 .owner = THIS_MODULE,
1395 .name = "STV0680 USB camera",
1396 .type = VID_TYPE_CAPTURE,
1397 .hardware = VID_HARDWARE_SE401,
1398 .fops = &stv680_fops,
1399 .release = video_device_release,
1400 .minor = -1,
1401 };
1402
1403 static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
1404 {
1405 struct usb_device *dev = interface_to_usbdev(intf);
1406 struct usb_host_interface *interface;
1407 struct usb_stv *stv680 = NULL;
1408 char *camera_name = NULL;
1409 int retval = 0;
1410
1411 /* We don't handle multi-config cameras */
1412 if (dev->descriptor.bNumConfigurations != 1) {
1413 PDEBUG (0, "STV(e): Number of Configurations != 1");
1414 return -ENODEV;
1415 }
1416
1417 interface = &intf->altsetting[0];
1418 /* Is it a STV680? */
1419 if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
1420 (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
1421 camera_name = "STV0680";
1422 PDEBUG (0, "STV(i): STV0680 camera found.");
1423 } else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) &&
1424 (le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) {
1425 camera_name = "Creative WebCam Go Mini";
1426 PDEBUG (0, "STV(i): Creative WebCam Go Mini found.");
1427 } else {
1428 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values.");
1429 PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer.");
1430 retval = -ENODEV;
1431 goto error;
1432 }
1433 /* We found one */
1434 if ((stv680 = kzalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
1435 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
1436 retval = -ENOMEM;
1437 goto error;
1438 }
1439
1440 stv680->udev = dev;
1441 stv680->camera_name = camera_name;
1442
1443 stv680->vdev = video_device_alloc();
1444 if (!stv680->vdev) {
1445 retval = -ENOMEM;
1446 goto error;
1447 }
1448 memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
1449 stv680->vdev->dev = &intf->dev;
1450 video_set_drvdata(stv680->vdev, stv680);
1451
1452 memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
1453 init_waitqueue_head (&stv680->wq);
1454 mutex_init (&stv680->lock);
1455 wmb ();
1456
1457 if (video_register_device (stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1458 PDEBUG (0, "STV(e): video_register_device failed");
1459 retval = -EIO;
1460 goto error_vdev;
1461 }
1462 PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor);
1463
1464 usb_set_intfdata (intf, stv680);
1465 retval = stv680_create_sysfs_files(stv680->vdev);
1466 if (retval)
1467 goto error_unreg;
1468 return 0;
1469
1470 error_unreg:
1471 video_unregister_device(stv680->vdev);
1472 error_vdev:
1473 video_device_release(stv680->vdev);
1474 error:
1475 kfree(stv680);
1476 return retval;
1477 }
1478
1479 static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
1480 {
1481 int i;
1482
1483 stv680->udev = NULL;
1484 stv680->frame[0].grabstate = FRAME_ERROR;
1485 stv680->frame[1].grabstate = FRAME_ERROR;
1486 stv680->streaming = 0;
1487
1488 wake_up_interruptible (&stv680->wq);
1489
1490 for (i = 0; i < STV680_NUMSBUF; i++)
1491 if (stv680->urb[i]) {
1492 usb_kill_urb (stv680->urb[i]);
1493 usb_free_urb (stv680->urb[i]);
1494 stv680->urb[i] = NULL;
1495 kfree(stv680->sbuf[i].data);
1496 }
1497 for (i = 0; i < STV680_NUMSCRATCH; i++)
1498 kfree(stv680->scratch[i].data);
1499 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
1500
1501 /* Free the memory */
1502 kfree(stv680);
1503 }
1504
1505 static void stv680_disconnect (struct usb_interface *intf)
1506 {
1507 struct usb_stv *stv680 = usb_get_intfdata (intf);
1508
1509 usb_set_intfdata (intf, NULL);
1510
1511 if (stv680) {
1512 /* We don't want people trying to open up the device */
1513 if (stv680->vdev) {
1514 stv680_remove_sysfs_files(stv680->vdev);
1515 video_unregister_device(stv680->vdev);
1516 stv680->vdev = NULL;
1517 }
1518 if (!stv680->user) {
1519 usb_stv680_remove_disconnected (stv680);
1520 } else {
1521 stv680->removed = 1;
1522 }
1523 }
1524 }
1525
1526 static struct usb_driver stv680_driver = {
1527 .name = "stv680",
1528 .probe = stv680_probe,
1529 .disconnect = stv680_disconnect,
1530 .id_table = device_table
1531 };
1532
1533 /********************************************************************
1534 * Module routines
1535 ********************************************************************/
1536
1537 static int __init usb_stv680_init (void)
1538 {
1539 if (usb_register (&stv680_driver) < 0) {
1540 PDEBUG (0, "STV(e): Could not setup STV0680 driver");
1541 return -1;
1542 }
1543 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
1544
1545 info(DRIVER_DESC " " DRIVER_VERSION);
1546 return 0;
1547 }
1548
1549 static void __exit usb_stv680_exit (void)
1550 {
1551 usb_deregister (&stv680_driver);
1552 PDEBUG (0, "STV(i): driver deregistered");
1553 }
1554
1555 module_init (usb_stv680_init);
1556 module_exit (usb_stv680_exit);
Linux 2.6 libata-dev (mirror)