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[PATCH] I2C: i2c-algo-pca -- gracefully handle a busy bus
[linux-2.6/next.git] / drivers / usb / media / stv680.c
blob7398a7f19c1e4e994c8de5f2343fc6dcfe6255c3
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/config.h>
62 #include <linux/module.h>
63 #include <linux/init.h>
64 #include <linux/vmalloc.h>
65 #include <linux/slab.h>
66 #include <linux/pagemap.h>
67 #include <linux/errno.h>
68 #include <linux/videodev.h>
69 #include <linux/usb.h>
70
71 #include "stv680.h"
72
73 static int video_nr = -1;
74 static int swapRGB = 0; /* default for auto sleect */
75 static int swapRGB_on = 0; /* default to allow auto select; -1=swap never, +1= swap always */
76
77 static unsigned int debug = 0;
78
79 #define PDEBUG(level, fmt, args...) \
80 do { \
81 if (debug >= level) \
82 info("[%s:%d] " fmt, __FUNCTION__, __LINE__ , ## args); \
83 } while (0)
84
85
86 /*
87 * Version Information
88 */
89 #define DRIVER_VERSION "v0.25"
90 #define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
91 #define DRIVER_DESC "STV0680 USB Camera Driver"
92
93 MODULE_AUTHOR (DRIVER_AUTHOR);
94 MODULE_DESCRIPTION (DRIVER_DESC);
95 MODULE_LICENSE ("GPL");
96 module_param(debug, int, S_IRUGO | S_IWUSR);
97 MODULE_PARM_DESC (debug, "Debug enabled or not");
98 module_param(swapRGB_on, int, 0);
99 MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
100 module_param(video_nr, int, 0);
101
102 /********************************************************************
103 *
104 * Memory management
105 *
106 * This is a shameless copy from the USB-cpia driver (linux kernel
107 * version 2.3.29 or so, I have no idea what this code actually does ;).
108 * Actually it seems to be a copy of a shameless copy of the bttv-driver.
109 * Or that is a copy of a shameless copy of ... (To the powers: is there
110 * no generic kernel-function to do this sort of stuff?)
111 *
112 * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
113 * there will be one, but apparentely not yet -jerdfelt
114 *
115 * So I copied it again for the ov511 driver -claudio
116 *
117 * Same for the se401 driver -Jeroen
118 *
119 * And the STV0680 driver - Kevin
120 ********************************************************************/
121 static void *rvmalloc (unsigned long size)
122 {
123 void *mem;
124 unsigned long adr;
125
126 size = PAGE_ALIGN(size);
127 mem = vmalloc_32 (size);
128 if (!mem)
129 return NULL;
130
131 memset (mem, 0, size); /* Clear the ram out, no junk to the user */
132 adr = (unsigned long) mem;
133 while (size > 0) {
134 SetPageReserved(vmalloc_to_page((void *)adr));
135 adr += PAGE_SIZE;
136 size -= PAGE_SIZE;
137 }
138 return mem;
139 }
140
141 static void rvfree (void *mem, unsigned long size)
142 {
143 unsigned long adr;
144
145 if (!mem)
146 return;
147
148 adr = (unsigned long) mem;
149 while ((long) size > 0) {
150 ClearPageReserved(vmalloc_to_page((void *)adr));
151 adr += PAGE_SIZE;
152 size -= PAGE_SIZE;
153 }
154 vfree (mem);
155 }
156
157
158 /*********************************************************************
159 * pencam read/write functions
160 ********************************************************************/
161
162 static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
163 {
164 int ret = -1;
165
166 switch (set) {
167 case 0: /* 0xc1 */
168 ret = usb_control_msg (stv680->udev,
169 usb_rcvctrlpipe (stv680->udev, 0),
170 req,
171 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
172 value, 0, buffer, size, PENCAM_TIMEOUT);
173 break;
174
175 case 1: /* 0x41 */
176 ret = usb_control_msg (stv680->udev,
177 usb_sndctrlpipe (stv680->udev, 0),
178 req,
179 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
180 value, 0, buffer, size, PENCAM_TIMEOUT);
181 break;
182
183 case 2: /* 0x80 */
184 ret = usb_control_msg (stv680->udev,
185 usb_rcvctrlpipe (stv680->udev, 0),
186 req,
187 (USB_DIR_IN | USB_RECIP_DEVICE),
188 value, 0, buffer, size, PENCAM_TIMEOUT);
189 break;
190
191 case 3: /* 0x40 */
192 ret = usb_control_msg (stv680->udev,
193 usb_sndctrlpipe (stv680->udev, 0),
194 req,
195 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
196 value, 0, buffer, size, PENCAM_TIMEOUT);
197 break;
198
199 }
200 if ((ret < 0) && (req != 0x0a)) {
201 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
202 }
203 return ret;
204 }
205
206 static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
207 {
208
209 if (configuration != dev->udev->actconfig->desc.bConfigurationValue
210 || usb_reset_configuration (dev->udev) < 0) {
211 PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
212 return -1;
213 }
214 if (usb_set_interface (dev->udev, interface, alternate) < 0) {
215 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
216 return -1;
217 }
218 return 0;
219 }
220
221 static int stv_stop_video (struct usb_stv *dev)
222 {
223 int i;
224 unsigned char *buf;
225
226 buf = kmalloc (40, GFP_KERNEL);
227 if (buf == NULL) {
228 PDEBUG (0, "STV(e): Out of (small buf) memory");
229 return -1;
230 }
231
232 /* this is a high priority command; it stops all lower order commands */
233 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
234 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
235 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
236 } else {
237 PDEBUG (1, "STV(i): Camera reset to idle mode.");
238 }
239
240 if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
241 PDEBUG (1, "STV(e): Reset config during exit failed");
242
243 /* get current mode */
244 buf[0] = 0xf0;
245 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
246 PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
247 if (dev->origMode != buf[0]) {
248 memset (buf, 0, 8);
249 buf[0] = (unsigned char) dev->origMode;
250 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
251 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
252 i = -1;
253 }
254 buf[0] = 0xf0;
255 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
256 if ((i != 0x08) || (buf[0] != dev->origMode)) {
257 PDEBUG (0, "STV(e): camera NOT set to original resolution.");
258 i = -1;
259 } else
260 PDEBUG (0, "STV(i): Camera set to original resolution");
261 }
262 /* origMode */
263 kfree (buf);
264 return i;
265 }
266
267 static int stv_set_video_mode (struct usb_stv *dev)
268 {
269 int i, stop_video = 1;
270 unsigned char *buf;
271
272 buf = kmalloc (40, GFP_KERNEL);
273 if (buf == NULL) {
274 PDEBUG (0, "STV(e): Out of (small buf) memory");
275 return -1;
276 }
277
278 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
279 kfree (buf);
280 return i;
281 }
282
283 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
284 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
285 PDEBUG (1, "STV(e): Could not get descriptor 0100.");
286 goto error;
287 }
288
289 /* set alternate interface 1 */
290 if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
291 goto error;
292
293 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
294 goto error;
295 PDEBUG (1, "STV(i): Setting video mode.");
296 /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
297 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
298 stop_video = 0;
299 goto error;
300 }
301 goto exit;
302
303 error:
304 kfree (buf);
305 if (stop_video == 1)
306 stv_stop_video (dev);
307 return -1;
308
309 exit:
310 kfree (buf);
311 return 0;
312 }
313
314 static int stv_init (struct usb_stv *stv680)
315 {
316 int i = 0;
317 unsigned char *buffer;
318 unsigned long int bufsize;
319
320 buffer = kmalloc (40, GFP_KERNEL);
321 if (buffer == NULL) {
322 PDEBUG (0, "STV(e): Out of (small buf) memory");
323 return -1;
324 }
325 memset (buffer, 0, 40);
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 void stv680_create_sysfs_files(struct video_device *vdev)
520 {
521 video_device_create_file(vdev, &class_device_attr_model);
522 video_device_create_file(vdev, &class_device_attr_in_use);
523 video_device_create_file(vdev, &class_device_attr_streaming);
524 video_device_create_file(vdev, &class_device_attr_palette);
525 video_device_create_file(vdev, &class_device_attr_frames_total);
526 video_device_create_file(vdev, &class_device_attr_frames_read);
527 video_device_create_file(vdev, &class_device_attr_packets_dropped);
528 video_device_create_file(vdev, &class_device_attr_decoding_errors);
529 }
530
531 static void stv680_remove_sysfs_files(struct video_device *vdev)
532 {
533 video_device_remove_file(vdev, &class_device_attr_model);
534 video_device_remove_file(vdev, &class_device_attr_in_use);
535 video_device_remove_file(vdev, &class_device_attr_streaming);
536 video_device_remove_file(vdev, &class_device_attr_palette);
537 video_device_remove_file(vdev, &class_device_attr_frames_total);
538 video_device_remove_file(vdev, &class_device_attr_frames_read);
539 video_device_remove_file(vdev, &class_device_attr_packets_dropped);
540 video_device_remove_file(vdev, &class_device_attr_decoding_errors);
541 }
542
543 /********************************************************************
544 * Camera control
545 *******************************************************************/
546
547 static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
548 {
549 /* This sets values for v4l interface. max/min = 65535/0 */
550
551 p->brightness = stv680->brightness;
552 p->whiteness = stv680->whiteness; /* greyscale */
553 p->colour = stv680->colour;
554 p->contrast = stv680->contrast;
555 p->hue = stv680->hue;
556 p->palette = stv680->palette;
557 p->depth = stv680->depth;
558 return 0;
559 }
560
561 static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
562 {
563 /* See above stv680_get_pict */
564
565 if (p->palette != STV_VIDEO_PALETTE) {
566 PDEBUG (2, "STV(e): Palette set error in _set_pic");
567 return 1;
568 }
569
570 if (stv680->brightness != p->brightness) {
571 stv680->chgbright = 1;
572 stv680->brightness = p->brightness;
573 }
574
575 stv680->whiteness = p->whiteness; /* greyscale */
576 stv680->colour = p->colour;
577 stv680->contrast = p->contrast;
578 stv680->hue = p->hue;
579 stv680->palette = p->palette;
580 stv680->depth = p->depth;
581
582 return 0;
583 }
584
585 static void stv680_video_irq (struct urb *urb, struct pt_regs *regs)
586 {
587 struct usb_stv *stv680 = urb->context;
588 int length = urb->actual_length;
589
590 if (length < stv680->rawbufsize)
591 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
592
593 /* ohoh... */
594 if (!stv680->streaming)
595 return;
596
597 if (!stv680->udev) {
598 PDEBUG (0, "STV(e): device vapourished in video_irq");
599 return;
600 }
601
602 /* 0 sized packets happen if we are to fast, but sometimes the camera
603 keeps sending them forever...
604 */
605 if (length && !urb->status) {
606 stv680->nullpackets = 0;
607 switch (stv680->scratch[stv680->scratch_next].state) {
608 case BUFFER_READY:
609 case BUFFER_BUSY:
610 stv680->dropped++;
611 break;
612
613 case BUFFER_UNUSED:
614 memcpy (stv680->scratch[stv680->scratch_next].data,
615 (unsigned char *) urb->transfer_buffer, length);
616 stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
617 stv680->scratch[stv680->scratch_next].length = length;
618 if (waitqueue_active (&stv680->wq)) {
619 wake_up_interruptible (&stv680->wq);
620 }
621 stv680->scratch_overflow = 0;
622 stv680->scratch_next++;
623 if (stv680->scratch_next >= STV680_NUMSCRATCH)
624 stv680->scratch_next = 0;
625 break;
626 } /* switch */
627 } else {
628 stv680->nullpackets++;
629 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
630 if (waitqueue_active (&stv680->wq)) {
631 wake_up_interruptible (&stv680->wq);
632 }
633 }
634 } /* if - else */
635
636 /* Resubmit urb for new data */
637 urb->status = 0;
638 urb->dev = stv680->udev;
639 if (usb_submit_urb (urb, GFP_ATOMIC))
640 PDEBUG (0, "STV(e): urb burned down in video irq");
641 return;
642 } /* _video_irq */
643
644 static int stv680_start_stream (struct usb_stv *stv680)
645 {
646 struct urb *urb;
647 int err = 0, i;
648
649 stv680->streaming = 1;
650
651 /* Do some memory allocation */
652 for (i = 0; i < STV680_NUMFRAMES; i++) {
653 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
654 stv680->frame[i].curpix = 0;
655 }
656 /* packet size = 4096 */
657 for (i = 0; i < STV680_NUMSBUF; i++) {
658 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
659 if (stv680->sbuf[i].data == NULL) {
660 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
661 return -1;
662 }
663 }
664
665 stv680->scratch_next = 0;
666 stv680->scratch_use = 0;
667 stv680->scratch_overflow = 0;
668 for (i = 0; i < STV680_NUMSCRATCH; i++) {
669 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
670 if (stv680->scratch[i].data == NULL) {
671 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
672 return -1;
673 }
674 stv680->scratch[i].state = BUFFER_UNUSED;
675 }
676
677 for (i = 0; i < STV680_NUMSBUF; i++) {
678 urb = usb_alloc_urb (0, GFP_KERNEL);
679 if (!urb)
680 return -ENOMEM;
681
682 /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
683 usb_fill_bulk_urb (urb, stv680->udev,
684 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
685 stv680->sbuf[i].data, stv680->rawbufsize,
686 stv680_video_irq, stv680);
687 stv680->urb[i] = urb;
688 err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
689 if (err)
690 PDEBUG (0, "STV(e): urb burned down in start stream");
691 } /* i STV680_NUMSBUF */
692
693 stv680->framecount = 0;
694 return 0;
695 }
696
697 static int stv680_stop_stream (struct usb_stv *stv680)
698 {
699 int i;
700
701 if (!stv680->streaming || !stv680->udev)
702 return 1;
703
704 stv680->streaming = 0;
705
706 for (i = 0; i < STV680_NUMSBUF; i++)
707 if (stv680->urb[i]) {
708 usb_kill_urb (stv680->urb[i]);
709 usb_free_urb (stv680->urb[i]);
710 stv680->urb[i] = NULL;
711 kfree (stv680->sbuf[i].data);
712 }
713 for (i = 0; i < STV680_NUMSCRATCH; i++) {
714 kfree (stv680->scratch[i].data);
715 stv680->scratch[i].data = NULL;
716 }
717
718 return 0;
719 }
720
721 static int stv680_set_size (struct usb_stv *stv680, int width, int height)
722 {
723 int wasstreaming = stv680->streaming;
724
725 /* Check to see if we need to change */
726 if ((stv680->vwidth == width) && (stv680->vheight == height))
727 return 0;
728
729 PDEBUG (1, "STV(i): size request for %i x %i", width, height);
730 /* Check for a valid mode */
731 if ((!width || !height) || ((width & 1) || (height & 1))) {
732 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);
733 return 1;
734 }
735
736 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
737 width = stv680->maxwidth / 2;
738 height = stv680->maxheight / 2;
739 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
740 width = 160;
741 height = 120;
742 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
743 width = 176;
744 height = 144;
745 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
746 width = 320;
747 height = 240;
748 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
749 width = 352;
750 height = 288;
751 } else {
752 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);
753 return 1;
754 }
755
756 /* Stop a current stream and start it again at the new size */
757 if (wasstreaming)
758 stv680_stop_stream (stv680);
759 stv680->vwidth = width;
760 stv680->vheight = height;
761 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
762 if (wasstreaming)
763 stv680_start_stream (stv680);
764
765 return 0;
766 }
767
768 /**********************************************************************
769 * Video Decoding
770 **********************************************************************/
771
772 /******* routines from the pencam program; hey, they work! ********/
773
774 /*
775 * STV0680 Vision Camera Chipset Driver
776 * Copyright (C) 2000 Adam Harrison <adam@antispin.org>
777 */
778
779 #define RED 0
780 #define GREEN 1
781 #define BLUE 2
782 #define AD(x, y, w) (((y)*(w)+(x))*3)
783
784 static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
785 {
786 int x, y, i;
787 int w = stv680->cwidth;
788 int vw = stv680->cwidth, vh = stv680->cheight;
789 unsigned int p = 0;
790 int colour = 0, bayer = 0;
791 unsigned char *raw = buffer->data;
792 struct stv680_frame *frame = &stv680->frame[stv680->curframe];
793 unsigned char *output = frame->data;
794 unsigned char *temp = frame->data;
795 int offset = buffer->offset;
796
797 if (frame->curpix == 0) {
798 if (frame->grabstate == FRAME_READY) {
799 frame->grabstate = FRAME_GRABBING;
800 }
801 }
802 if (offset != frame->curpix) { /* Regard frame as lost :( */
803 frame->curpix = 0;
804 stv680->error++;
805 return;
806 }
807
808 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
809 vw = 320;
810 vh = 240;
811 }
812 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
813 vw = 352;
814 vh = 288;
815 }
816
817 memset (output, 0, 3 * vw * vh); /* clear output matrix. */
818
819 for (y = 0; y < vh; y++) {
820 for (x = 0; x < vw; x++) {
821 if (x & 1)
822 p = *(raw + y * w + (x >> 1));
823 else
824 p = *(raw + y * w + (x >> 1) + (w >> 1));
825
826 if (y & 1)
827 bayer = 2;
828 else
829 bayer = 0;
830 if (x & 1)
831 bayer++;
832
833 switch (bayer) {
834 case 0:
835 case 3:
836 colour = 1;
837 break;
838 case 1:
839 colour = 0;
840 break;
841 case 2:
842 colour = 2;
843 break;
844 }
845 i = (y * vw + x) * 3;
846 *(output + i + colour) = (unsigned char) p;
847 } /* for x */
848
849 } /* for y */
850
851 /****** gamma correction plus hardcoded white balance */
852 /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
853 Correction values red[], green[], blue[], are generated by
854 (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
855 White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
856 converted to unsigned char. Values are in stv680.h */
857
858 for (y = 0; y < vh; y++) {
859 for (x = 0; x < vw; x++) {
860 i = (y * vw + x) * 3;
861 *(output + i) = red[*(output + i)];
862 *(output + i + 1) = green[*(output + i + 1)];
863 *(output + i + 2) = blue[*(output + i + 2)];
864 }
865 }
866
867 /****** bayer demosaic ******/
868 for (y = 1; y < (vh - 1); y++) {
869 for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
870 if (y & 1)
871 bayer = 0;
872 else
873 bayer = 2;
874 if (!(x & 1))
875 bayer++;
876
877 switch (bayer) {
878 case 0: /* green. blue lr, red tb */
879 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
880 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
881 break;
882
883 case 1: /* blue. green lrtb, red diagonals */
884 *(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;
885 *(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;
886 break;
887
888 case 2: /* red. green lrtb, blue diagonals */
889 *(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;
890 *(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;
891 break;
892
893 case 3: /* green. red lr, blue tb */
894 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
895 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
896 break;
897 } /* switch */
898 } /* for x */
899 } /* for y - end demosaic */
900
901 /* fix top and bottom row, left and right side */
902 i = vw * 3;
903 memcpy (output, (output + i), i);
904 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
905 for (y = 0; y < vh; y++) {
906 i = y * vw * 3;
907 memcpy ((output + i), (output + i + 3), 3);
908 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
909 }
910
911 /* process all raw data, then trim to size if necessary */
912 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
913 i = 0;
914 for (y = 0; y < vh; y++) {
915 if (!(y & 1)) {
916 for (x = 0; x < vw; x++) {
917 p = (y * vw + x) * 3;
918 if (!(x & 1)) {
919 *(output + i) = *(output + p);
920 *(output + i + 1) = *(output + p + 1);
921 *(output + i + 2) = *(output + p + 2);
922 i += 3;
923 }
924 } /* for x */
925 }
926 } /* for y */
927 }
928 /* reset to proper width */
929 if ((stv680->vwidth == 160)) {
930 vw = 160;
931 vh = 120;
932 }
933 if ((stv680->vwidth == 176)) {
934 vw = 176;
935 vh = 144;
936 }
937
938 /* output is RGB; some programs want BGR */
939 /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
940 /* swapRGB_on=-1, never swap */
941 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
942 for (y = 0; y < vh; y++) {
943 for (x = 0; x < vw; x++) {
944 i = (y * vw + x) * 3;
945 *(temp) = *(output + i);
946 *(output + i) = *(output + i + 2);
947 *(output + i + 2) = *(temp);
948 }
949 }
950 }
951 /* brightness */
952 if (stv680->chgbright == 1) {
953 if (stv680->brightness >= 32767) {
954 p = (stv680->brightness - 32767) / 256;
955 for (x = 0; x < (vw * vh * 3); x++) {
956 if ((*(output + x) + (unsigned char) p) > 255)
957 *(output + x) = 255;
958 else
959 *(output + x) += (unsigned char) p;
960 } /* for */
961 } else {
962 p = (32767 - stv680->brightness) / 256;
963 for (x = 0; x < (vw * vh * 3); x++) {
964 if ((unsigned char) p > *(output + x))
965 *(output + x) = 0;
966 else
967 *(output + x) -= (unsigned char) p;
968 } /* for */
969 } /* else */
970 }
971 /* if */
972 frame->curpix = 0;
973 frame->curlinepix = 0;
974 frame->grabstate = FRAME_DONE;
975 stv680->framecount++;
976 stv680->readcount++;
977 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
978 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
979 }
980
981 } /* bayer_unshuffle */
982
983 /******* end routines from the pencam program *********/
984
985 static int stv680_newframe (struct usb_stv *stv680, int framenr)
986 {
987 int errors = 0;
988
989 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
990 if (!stv680->frame[framenr].curpix) {
991 errors++;
992 }
993 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
994
995 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
996 stv680->nullpackets = 0;
997 PDEBUG (2, "STV(i): too many null length packets, restarting capture");
998 stv680_stop_stream (stv680);
999 stv680_start_stream (stv680);
1000 } else {
1001 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
1002 stv680->frame[framenr].grabstate = FRAME_ERROR;
1003 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
1004 return -EIO;
1005 }
1006 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
1007
1008 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
1009
1010 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
1011 stv680->scratch_use++;
1012 if (stv680->scratch_use >= STV680_NUMSCRATCH)
1013 stv680->scratch_use = 0;
1014 if (errors > STV680_MAX_ERRORS) {
1015 errors = 0;
1016 PDEBUG (2, "STV(i): too many errors, restarting capture");
1017 stv680_stop_stream (stv680);
1018 stv680_start_stream (stv680);
1019 }
1020 } /* else */
1021 } /* while */
1022 return 0;
1023 }
1024
1025 /*********************************************************************
1026 * Video4Linux
1027 *********************************************************************/
1028
1029 static int stv_open (struct inode *inode, struct file *file)
1030 {
1031 struct video_device *dev = video_devdata(file);
1032 struct usb_stv *stv680 = video_get_drvdata(dev);
1033 int err = 0;
1034
1035 /* we are called with the BKL held */
1036 stv680->user = 1;
1037 err = stv_init (stv680); /* main initialization routine for camera */
1038
1039 if (err >= 0) {
1040 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
1041 if (!stv680->fbuf) {
1042 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
1043 err = -ENOMEM;
1044 }
1045 file->private_data = dev;
1046 }
1047 if (err)
1048 stv680->user = 0;
1049
1050 return err;
1051 }
1052
1053 static int stv_close (struct inode *inode, struct file *file)
1054 {
1055 struct video_device *dev = file->private_data;
1056 struct usb_stv *stv680 = video_get_drvdata(dev);
1057 int i;
1058
1059 for (i = 0; i < STV680_NUMFRAMES; i++)
1060 stv680->frame[i].grabstate = FRAME_UNUSED;
1061 if (stv680->streaming)
1062 stv680_stop_stream (stv680);
1063
1064 if ((i = stv_stop_video (stv680)) < 0)
1065 PDEBUG (1, "STV(e): stop_video failed in stv_close");
1066
1067 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
1068 stv680->user = 0;
1069
1070 if (stv680->removed) {
1071 kfree (stv680);
1072 stv680 = NULL;
1073 PDEBUG (0, "STV(i): device unregistered");
1074 }
1075 file->private_data = NULL;
1076 return 0;
1077 }
1078
1079 static int stv680_do_ioctl (struct inode *inode, struct file *file,
1080 unsigned int cmd, void *arg)
1081 {
1082 struct video_device *vdev = file->private_data;
1083 struct usb_stv *stv680 = video_get_drvdata(vdev);
1084
1085 if (!stv680->udev)
1086 return -EIO;
1087
1088 switch (cmd) {
1089 case VIDIOCGCAP:{
1090 struct video_capability *b = arg;
1091
1092 strcpy (b->name, stv680->camera_name);
1093 b->type = VID_TYPE_CAPTURE;
1094 b->channels = 1;
1095 b->audios = 0;
1096 b->maxwidth = stv680->maxwidth;
1097 b->maxheight = stv680->maxheight;
1098 b->minwidth = stv680->maxwidth / 2;
1099 b->minheight = stv680->maxheight / 2;
1100 return 0;
1101 }
1102 case VIDIOCGCHAN:{
1103 struct video_channel *v = arg;
1104
1105 if (v->channel != 0)
1106 return -EINVAL;
1107 v->flags = 0;
1108 v->tuners = 0;
1109 v->type = VIDEO_TYPE_CAMERA;
1110 strcpy (v->name, "STV Camera");
1111 return 0;
1112 }
1113 case VIDIOCSCHAN:{
1114 struct video_channel *v = arg;
1115 if (v->channel != 0)
1116 return -EINVAL;
1117 return 0;
1118 }
1119 case VIDIOCGPICT:{
1120 struct video_picture *p = arg;
1121
1122 stv680_get_pict (stv680, p);
1123 return 0;
1124 }
1125 case VIDIOCSPICT:{
1126 struct video_picture *p = arg;
1127
1128 if (stv680_set_pict (stv680, p))
1129 return -EINVAL;
1130 return 0;
1131 }
1132 case VIDIOCSWIN:{
1133 struct video_window *vw = arg;
1134
1135 if (vw->flags)
1136 return -EINVAL;
1137 if (vw->clipcount)
1138 return -EINVAL;
1139 if (vw->width != stv680->vwidth) {
1140 if (stv680_set_size (stv680, vw->width, vw->height)) {
1141 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
1142 return -EINVAL;
1143 }
1144 }
1145 return 0;
1146 }
1147 case VIDIOCGWIN:{
1148 struct video_window *vw = arg;
1149
1150 vw->x = 0; /* FIXME */
1151 vw->y = 0;
1152 vw->chromakey = 0;
1153 vw->flags = 0;
1154 vw->clipcount = 0;
1155 vw->width = stv680->vwidth;
1156 vw->height = stv680->vheight;
1157 return 0;
1158 }
1159 case VIDIOCGMBUF:{
1160 struct video_mbuf *vm = arg;
1161 int i;
1162
1163 memset (vm, 0, sizeof (*vm));
1164 vm->size = STV680_NUMFRAMES * stv680->maxframesize;
1165 vm->frames = STV680_NUMFRAMES;
1166 for (i = 0; i < STV680_NUMFRAMES; i++)
1167 vm->offsets[i] = stv680->maxframesize * i;
1168 return 0;
1169 }
1170 case VIDIOCMCAPTURE:{
1171 struct video_mmap *vm = arg;
1172
1173 if (vm->format != STV_VIDEO_PALETTE) {
1174 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
1175 vm->format, STV_VIDEO_PALETTE);
1176 if ((vm->format == 3) && (swapRGB_on == 0)) {
1177 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
1178 /* this may fix those apps (e.g., xawtv) that want BGR */
1179 swapRGB = 1;
1180 }
1181 return -EINVAL;
1182 }
1183 if (vm->frame >= STV680_NUMFRAMES) {
1184 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
1185 return -EINVAL;
1186 }
1187 if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
1188 || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
1189 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
1190 stv680->frame[vm->frame].grabstate);
1191 return -EBUSY;
1192 }
1193 /* Is this according to the v4l spec??? */
1194 if (stv680->vwidth != vm->width) {
1195 if (stv680_set_size (stv680, vm->width, vm->height)) {
1196 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
1197 return -EINVAL;
1198 }
1199 }
1200 stv680->frame[vm->frame].grabstate = FRAME_READY;
1201
1202 if (!stv680->streaming)
1203 stv680_start_stream (stv680);
1204
1205 return 0;
1206 }
1207 case VIDIOCSYNC:{
1208 int *frame = arg;
1209 int ret = 0;
1210
1211 if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
1212 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
1213 return -EINVAL;
1214 }
1215 ret = stv680_newframe (stv680, *frame);
1216 stv680->frame[*frame].grabstate = FRAME_UNUSED;
1217 return ret;
1218 }
1219 case VIDIOCGFBUF:{
1220 struct video_buffer *vb = arg;
1221
1222 memset (vb, 0, sizeof (*vb));
1223 return 0;
1224 }
1225 case VIDIOCKEY:
1226 return 0;
1227 case VIDIOCCAPTURE:
1228 {
1229 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
1230 return -EINVAL;
1231 }
1232 case VIDIOCSFBUF:
1233 case VIDIOCGTUNER:
1234 case VIDIOCSTUNER:
1235 case VIDIOCGFREQ:
1236 case VIDIOCSFREQ:
1237 case VIDIOCGAUDIO:
1238 case VIDIOCSAUDIO:
1239 return -EINVAL;
1240 default:
1241 return -ENOIOCTLCMD;
1242 } /* end switch */
1243
1244 return 0;
1245 }
1246
1247 static int stv680_ioctl(struct inode *inode, struct file *file,
1248 unsigned int cmd, unsigned long arg)
1249 {
1250 return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl);
1251 }
1252
1253 static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
1254 {
1255 struct video_device *dev = file->private_data;
1256 struct usb_stv *stv680 = video_get_drvdata(dev);
1257 unsigned long start = vma->vm_start;
1258 unsigned long size = vma->vm_end-vma->vm_start;
1259 unsigned long page, pos;
1260
1261 down (&stv680->lock);
1262
1263 if (stv680->udev == NULL) {
1264 up (&stv680->lock);
1265 return -EIO;
1266 }
1267 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
1268 & ~(PAGE_SIZE - 1))) {
1269 up (&stv680->lock);
1270 return -EINVAL;
1271 }
1272 pos = (unsigned long) stv680->fbuf;
1273 while (size > 0) {
1274 page = vmalloc_to_pfn((void *)pos);
1275 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1276 up (&stv680->lock);
1277 return -EAGAIN;
1278 }
1279 start += PAGE_SIZE;
1280 pos += PAGE_SIZE;
1281 if (size > PAGE_SIZE)
1282 size -= PAGE_SIZE;
1283 else
1284 size = 0;
1285 }
1286 up (&stv680->lock);
1287
1288 return 0;
1289 }
1290
1291 static ssize_t stv680_read (struct file *file, char __user *buf,
1292 size_t count, loff_t *ppos)
1293 {
1294 struct video_device *dev = file->private_data;
1295 unsigned long int realcount = count;
1296 int ret = 0;
1297 struct usb_stv *stv680 = video_get_drvdata(dev);
1298 unsigned long int i;
1299
1300 if (STV680_NUMFRAMES != 2) {
1301 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
1302 return -1;
1303 }
1304 if (stv680->udev == NULL)
1305 return -EIO;
1306 if (realcount > (stv680->vwidth * stv680->vheight * 3))
1307 realcount = stv680->vwidth * stv680->vheight * 3;
1308
1309 /* Shouldn't happen: */
1310 if (stv680->frame[0].grabstate == FRAME_GRABBING) {
1311 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
1312 return -EBUSY;
1313 }
1314 stv680->frame[0].grabstate = FRAME_READY;
1315 stv680->frame[1].grabstate = FRAME_UNUSED;
1316 stv680->curframe = 0;
1317
1318 if (!stv680->streaming)
1319 stv680_start_stream (stv680);
1320
1321 if (!stv680->streaming) {
1322 ret = stv680_newframe (stv680, 0); /* ret should = 0 */
1323 }
1324
1325 ret = stv680_newframe (stv680, 0);
1326
1327 if (!ret) {
1328 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
1329 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
1330 return -EFAULT;
1331 }
1332 } else {
1333 realcount = ret;
1334 }
1335 stv680->frame[0].grabstate = FRAME_UNUSED;
1336 return realcount;
1337 } /* stv680_read */
1338
1339 static struct file_operations stv680_fops = {
1340 .owner = THIS_MODULE,
1341 .open = stv_open,
1342 .release = stv_close,
1343 .read = stv680_read,
1344 .mmap = stv680_mmap,
1345 .ioctl = stv680_ioctl,
1346 .llseek = no_llseek,
1347 };
1348 static struct video_device stv680_template = {
1349 .owner = THIS_MODULE,
1350 .name = "STV0680 USB camera",
1351 .type = VID_TYPE_CAPTURE,
1352 .hardware = VID_HARDWARE_SE401,
1353 .fops = &stv680_fops,
1354 .release = video_device_release,
1355 .minor = -1,
1356 };
1357
1358 static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
1359 {
1360 struct usb_device *dev = interface_to_usbdev(intf);
1361 struct usb_host_interface *interface;
1362 struct usb_stv *stv680 = NULL;
1363 char *camera_name = NULL;
1364 int retval = 0;
1365
1366 /* We don't handle multi-config cameras */
1367 if (dev->descriptor.bNumConfigurations != 1) {
1368 PDEBUG (0, "STV(e): Number of Configurations != 1");
1369 return -ENODEV;
1370 }
1371
1372 interface = &intf->altsetting[0];
1373 /* Is it a STV680? */
1374 if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
1375 (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
1376 camera_name = "STV0680";
1377 PDEBUG (0, "STV(i): STV0680 camera found.");
1378 } else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) &&
1379 (le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) {
1380 camera_name = "Creative WebCam Go Mini";
1381 PDEBUG (0, "STV(i): Creative WebCam Go Mini found.");
1382 } else {
1383 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values.");
1384 PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer.");
1385 retval = -ENODEV;
1386 goto error;
1387 }
1388 /* We found one */
1389 if ((stv680 = kmalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
1390 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
1391 retval = -ENOMEM;
1392 goto error;
1393 }
1394
1395 memset (stv680, 0, sizeof (*stv680));
1396
1397 stv680->udev = dev;
1398 stv680->camera_name = camera_name;
1399
1400 stv680->vdev = video_device_alloc();
1401 if (!stv680->vdev) {
1402 retval = -ENOMEM;
1403 goto error;
1404 }
1405 memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
1406 stv680->vdev->dev = &intf->dev;
1407 video_set_drvdata(stv680->vdev, stv680);
1408
1409 memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
1410 init_waitqueue_head (&stv680->wq);
1411 init_MUTEX (&stv680->lock);
1412 wmb ();
1413
1414 if (video_register_device (stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1415 PDEBUG (0, "STV(e): video_register_device failed");
1416 retval = -EIO;
1417 goto error_vdev;
1418 }
1419 PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor);
1420
1421 usb_set_intfdata (intf, stv680);
1422 stv680_create_sysfs_files(stv680->vdev);
1423 return 0;
1424
1425 error_vdev:
1426 video_device_release(stv680->vdev);
1427 error:
1428 kfree(stv680);
1429 return retval;
1430 }
1431
1432 static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
1433 {
1434 int i;
1435
1436 stv680->udev = NULL;
1437 stv680->frame[0].grabstate = FRAME_ERROR;
1438 stv680->frame[1].grabstate = FRAME_ERROR;
1439 stv680->streaming = 0;
1440
1441 wake_up_interruptible (&stv680->wq);
1442
1443 for (i = 0; i < STV680_NUMSBUF; i++)
1444 if (stv680->urb[i]) {
1445 usb_kill_urb (stv680->urb[i]);
1446 usb_free_urb (stv680->urb[i]);
1447 stv680->urb[i] = NULL;
1448 kfree (stv680->sbuf[i].data);
1449 }
1450 for (i = 0; i < STV680_NUMSCRATCH; i++)
1451 kfree (stv680->scratch[i].data);
1452 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
1453
1454 /* Free the memory */
1455 kfree (stv680);
1456 }
1457
1458 static void stv680_disconnect (struct usb_interface *intf)
1459 {
1460 struct usb_stv *stv680 = usb_get_intfdata (intf);
1461
1462 usb_set_intfdata (intf, NULL);
1463
1464 if (stv680) {
1465 /* We don't want people trying to open up the device */
1466 if (stv680->vdev) {
1467 stv680_remove_sysfs_files(stv680->vdev);
1468 video_unregister_device(stv680->vdev);
1469 stv680->vdev = NULL;
1470 }
1471 if (!stv680->user) {
1472 usb_stv680_remove_disconnected (stv680);
1473 } else {
1474 stv680->removed = 1;
1475 }
1476 }
1477 }
1478
1479 static struct usb_driver stv680_driver = {
1480 .owner = THIS_MODULE,
1481 .name = "stv680",
1482 .probe = stv680_probe,
1483 .disconnect = stv680_disconnect,
1484 .id_table = device_table
1485 };
1486
1487 /********************************************************************
1488 * Module routines
1489 ********************************************************************/
1490
1491 static int __init usb_stv680_init (void)
1492 {
1493 if (usb_register (&stv680_driver) < 0) {
1494 PDEBUG (0, "STV(e): Could not setup STV0680 driver");
1495 return -1;
1496 }
1497 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
1498
1499 info(DRIVER_DESC " " DRIVER_VERSION);
1500 return 0;
1501 }
1502
1503 static void __exit usb_stv680_exit (void)
1504 {
1505 usb_deregister (&stv680_driver);
1506 PDEBUG (0, "STV(i): driver deregistered");
1507 }
1508
1509 module_init (usb_stv680_init);
1510 module_exit (usb_stv680_exit);
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