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61#include <linux/config.h>
62#include <linux/module.h>
63#include <linux/version.h>
64#include <linux/init.h>
65#include <linux/fs.h>
66#include <linux/vmalloc.h>
67#include <linux/slab.h>
68#include <linux/proc_fs.h>
69#include <linux/pagemap.h>
70#include <linux/wrapper.h>
71#include <linux/smp_lock.h>
72#include <linux/sched.h>
73#include <linux/signal.h>
74#include <linux/errno.h>
75#include <linux/videodev.h>
76#include <linux/usb.h>
77
78#include "stv680.h"
79
80static int video_nr = -1;
81static int swapRGB = 0;
82static int swapRGB_on = 0;
83
84static unsigned int debug = 0;
85
86#define PDEBUG(level, fmt, args...) \
87 do { \
88 if (debug >= level) \
89 info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args); \
90 } while (0)
91
92
93
94
95
96#define DRIVER_VERSION "v0.25"
97#define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
98#define DRIVER_DESC "STV0680 USB Camera Driver"
99
100MODULE_AUTHOR (DRIVER_AUTHOR);
101MODULE_DESCRIPTION (DRIVER_DESC);
102MODULE_LICENSE ("GPL");
103MODULE_PARM (debug, "i");
104MODULE_PARM_DESC (debug, "Debug enabled or not");
105MODULE_PARM (swapRGB_on, "i");
106MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
107MODULE_PARM (video_nr, "i");
108EXPORT_NO_SYMBOLS;
109
110
111
112
113
114
115
116
117
118
119static inline unsigned long kvirt_to_pa (unsigned long adr)
120{
121 unsigned long kva, ret;
122
123 kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
124 kva |= adr & (PAGE_SIZE-1);
125 ret = __pa(kva);
126 return ret;
127}
128
129static void *rvmalloc (unsigned long size)
130{
131 void *mem;
132 unsigned long adr;
133
134 size = PAGE_ALIGN(size);
135 mem = vmalloc_32 (size);
136 if (!mem)
137 return NULL;
138
139 memset (mem, 0, size);
140 adr = (unsigned long) mem;
141 while (size > 0) {
142 mem_map_reserve(vmalloc_to_page((void *)adr));
143 adr += PAGE_SIZE;
144 size -= PAGE_SIZE;
145 }
146 return mem;
147}
148
149static void rvfree (void *mem, unsigned long size)
150{
151 unsigned long adr;
152
153 if (!mem)
154 return;
155
156 adr = (unsigned long) mem;
157 while ((long) size > 0) {
158 mem_map_unreserve(vmalloc_to_page((void *)adr));
159 adr += PAGE_SIZE;
160 size -= PAGE_SIZE;
161 }
162 vfree (mem);
163}
164
165
166
167
168
169
170static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
171{
172 int ret = -1;
173
174 switch (set) {
175 case 0:
176 ret = usb_control_msg (stv680->udev,
177 usb_rcvctrlpipe (stv680->udev, 0),
178 req,
179 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
180 value, 0, buffer, size, PENCAM_TIMEOUT);
181 break;
182
183 case 1:
184 ret = usb_control_msg (stv680->udev,
185 usb_sndctrlpipe (stv680->udev, 0),
186 req,
187 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
188 value, 0, buffer, size, PENCAM_TIMEOUT);
189 break;
190
191 case 2:
192 ret = usb_control_msg (stv680->udev,
193 usb_rcvctrlpipe (stv680->udev, 0),
194 req,
195 (USB_DIR_IN | USB_RECIP_DEVICE),
196 value, 0, buffer, size, PENCAM_TIMEOUT);
197 break;
198
199 case 3:
200 ret = usb_control_msg (stv680->udev,
201 usb_sndctrlpipe (stv680->udev, 0),
202 req,
203 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
204 value, 0, buffer, size, PENCAM_TIMEOUT);
205 break;
206
207 }
208 if ((ret < 0) && (req != 0x0a)) {
209 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
210 }
211 return ret;
212}
213
214static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
215{
216
217 if (usb_set_configuration (dev->udev, configuration) < 0) {
218 PDEBUG (1, "STV(e): FAILED to set configuration %i", configuration);
219 return -1;
220 }
221 if (usb_set_interface (dev->udev, interface, alternate) < 0) {
222 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
223 return -1;
224 }
225 return 0;
226}
227
228static int stv_stop_video (struct usb_stv *dev)
229{
230 int i;
231 unsigned char *buf;
232
233 buf = kmalloc (40, GFP_KERNEL);
234 if (buf == NULL) {
235 PDEBUG (0, "STV(e): Out of (small buf) memory");
236 return -1;
237 }
238
239
240 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
241 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02);
242 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
243 } else {
244 PDEBUG (1, "STV(i): Camera reset to idle mode.");
245 }
246
247 if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
248 PDEBUG (1, "STV(e): Reset config during exit failed");
249
250
251 buf[0] = 0xf0;
252 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08)
253 PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
254 if (dev->origMode != buf[0]) {
255 memset (buf, 0, 8);
256 buf[0] = (unsigned char) dev->origMode;
257 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
258 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
259 i = -1;
260 }
261 buf[0] = 0xf0;
262 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
263 if ((i != 0x08) || (buf[0] != dev->origMode)) {
264 PDEBUG (0, "STV(e): camera NOT set to original resolution.");
265 i = -1;
266 } else
267 PDEBUG (0, "STV(i): Camera set to original resolution");
268 }
269
270 kfree (buf);
271 return i;
272}
273
274static int stv_set_video_mode (struct usb_stv *dev)
275{
276 int i, stop_video = 1;
277 unsigned char *buf;
278
279 buf = kmalloc (40, GFP_KERNEL);
280 if (buf == NULL) {
281 PDEBUG (0, "STV(e): Out of (small buf) memory");
282 return -1;
283 }
284
285 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
286 kfree (buf);
287 return i;
288 }
289
290 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
291 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
292 PDEBUG (1, "STV(e): Could not get descriptor 0100.");
293 goto error;
294 }
295
296
297 if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
298 goto error;
299
300 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
301 goto error;
302 PDEBUG (1, "STV(i): Setting video mode.");
303
304 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
305 stop_video = 0;
306 goto error;
307 }
308 goto exit;
309
310error:
311 kfree (buf);
312 if (stop_video == 1)
313 stv_stop_video (dev);
314 return -1;
315
316exit:
317 kfree (buf);
318 return 0;
319}
320
321static int stv_init (struct usb_stv *stv680)
322{
323 int i = 0;
324 unsigned char *buffer;
325 unsigned long int bufsize;
326
327 buffer = kmalloc (40, GFP_KERNEL);
328 if (buffer == NULL) {
329 PDEBUG (0, "STV(e): Out of (small buf) memory");
330 return -1;
331 }
332 memset (buffer, 0, 40);
333 udelay (100);
334
335
336 if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
337 kfree (buffer);
338 PDEBUG (0, "STV(e): set config 1,0,0 failed");
339 return -1;
340 }
341
342 if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
343 goto error;
344 if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
345 PDEBUG (1, "STV(e): camera ping failed!!");
346 goto error;
347 }
348
349
350 if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
351 goto error;
352 i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
353 if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
354 PDEBUG (1, "STV(e): Could not get descriptor 0200.");
355 goto error;
356 }
357 if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
358 goto error;
359 if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
360 goto error;
361 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
362 goto error;
363
364 stv680->SupportedModes = buffer[7];
365 i = stv680->SupportedModes;
366 stv680->CIF = 0;
367 stv680->VGA = 0;
368 stv680->QVGA = 0;
369 if (i & 1)
370 stv680->CIF = 1;
371 if (i & 2)
372 stv680->VGA = 1;
373 if (i & 8)
374 stv680->QVGA = 1;
375 if (stv680->SupportedModes == 0) {
376 PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
377 i = -1;
378 goto error;
379 } else {
380 if (stv680->CIF)
381 PDEBUG (0, "STV(i): CIF is supported");
382 if (stv680->QVGA)
383 PDEBUG (0, "STV(i): QVGA is supported");
384 }
385
386 PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
387 PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
388 PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
389
390
391 if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
392 goto error;
393
394 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
395 goto error;
396 if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
397 goto error;
398 i = buffer[3];
399 PDEBUG (0, "STV(i): Camera has %i pictures.", i);
400
401
402 if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
403 goto error;
404 stv680->origMode = buffer[0];
405
406
407 memset (buffer, 0, 8);
408 if (stv680->CIF)
409 buffer[0] = 0x00;
410 else if (stv680->QVGA)
411 buffer[0] = 0x03;
412 if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
413 PDEBUG (0, "STV(i): Set_Camera_Mode failed");
414 i = -1;
415 goto error;
416 }
417 buffer[0] = 0xf0;
418 stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
419 if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
420 PDEBUG (0, "STV(e): Error setting camera video mode!");
421 i = -1;
422 goto error;
423 } else {
424 if (buffer[0] == 0) {
425 stv680->VideoMode = 0x0000;
426 PDEBUG (0, "STV(i): Video Mode set to CIF");
427 }
428 if (buffer[0] == 0x03) {
429 stv680->VideoMode = 0x0300;
430 PDEBUG (0, "STV(i): Video Mode set to QVGA");
431 }
432 }
433 if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
434 goto error;
435 bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
436 stv680->cwidth = (buffer[4] << 8) | (buffer[5]);
437 stv680->cheight = (buffer[6] << 8) | (buffer[7]);
438 stv680->origGain = buffer[12];
439
440 goto exit;
441
442error:
443 i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02);
444 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
445 kfree (buffer);
446 return -1;
447
448exit:
449 kfree (buffer);
450
451
452 if (stv680->CIF == 1) {
453 stv680->maxwidth = 352;
454 stv680->maxheight = 288;
455 stv680->vwidth = 352;
456 stv680->vheight = 288;
457 }
458 if (stv680->QVGA == 1) {
459 stv680->maxwidth = 320;
460 stv680->maxheight = 240;
461 stv680->vwidth = 320;
462 stv680->vheight = 240;
463 }
464
465 stv680->rawbufsize = bufsize;
466 stv680->maxframesize = bufsize * 3;
467 PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
468 PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
469
470
471 stv680->bulk_in_endpointAddr = 0x82;
472 stv680->dropped = 0;
473 stv680->error = 0;
474 stv680->framecount = 0;
475 stv680->readcount = 0;
476 stv680->streaming = 0;
477
478 stv680->brightness = 32767;
479 stv680->chgbright = 0;
480 stv680->whiteness = 0;
481 stv680->colour = 32767;
482 stv680->contrast = 32767;
483 stv680->hue = 32767;
484 stv680->palette = STV_VIDEO_PALETTE;
485 stv680->depth = 24;
486 swapRGB = 0;
487 if ((swapRGB_on == 0) && (swapRGB == 0))
488 PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
489 else if ((swapRGB_on == 1) && (swapRGB == 1))
490 PDEBUG (1, "STV(i): swapRGB is (auto) ON");
491 else if (swapRGB_on == 1)
492 PDEBUG (1, "STV(i): swapRGB is (forced) ON");
493 else if (swapRGB_on == -1)
494 PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
495
496 if (stv_set_video_mode (stv680) < 0) {
497 PDEBUG (0, "STV(e): Could not set video mode in stv_init");
498 return -1;
499 }
500
501 return 0;
502}
503
504
505
506
507
508
509
510#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
511
512static struct proc_dir_entry *stv680_proc_entry = NULL;
513extern struct proc_dir_entry *video_proc_entry;
514
515#define YES_NO(x) ((x) ? "yes" : "no")
516#define ON_OFF(x) ((x) ? "(auto) on" : "(auto) off")
517
518static int stv680_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
519{
520 char *out = page;
521 int len;
522 struct usb_stv *stv680 = data;
523
524
525
526 out += sprintf (out, "driver_version : %s\n", DRIVER_VERSION);
527 out += sprintf (out, "model : %s\n", stv680->camera_name);
528 out += sprintf (out, "in use : %s\n", YES_NO (stv680->user));
529 out += sprintf (out, "streaming : %s\n", YES_NO (stv680->streaming));
530 out += sprintf (out, "num_frames : %d\n", STV680_NUMFRAMES);
531
532 out += sprintf (out, "Current size : %ix%i\n", stv680->vwidth, stv680->vheight);
533 if (swapRGB_on == 0)
534 out += sprintf (out, "swapRGB : %s\n", ON_OFF (swapRGB));
535 else if (swapRGB_on == 1)
536 out += sprintf (out, "swapRGB : (forced) on\n");
537 else if (swapRGB_on == -1)
538 out += sprintf (out, "swapRGB : (forced) off\n");
539
540 out += sprintf (out, "Palette : %i", stv680->palette);
541
542 out += sprintf (out, "\n");
543
544 out += sprintf (out, "Frames total : %d\n", stv680->readcount);
545 out += sprintf (out, "Frames read : %d\n", stv680->framecount);
546 out += sprintf (out, "Packets dropped : %d\n", stv680->dropped);
547 out += sprintf (out, "Decoding Errors : %d\n", stv680->error);
548
549 len = out - page;
550 len -= off;
551 if (len < count) {
552 *eof = 1;
553 if (len <= 0)
554 return 0;
555 } else
556 len = count;
557
558 *start = page + off;
559 return len;
560}
561
562static int create_proc_stv680_cam (struct usb_stv *stv680)
563{
564 char name[9];
565 struct proc_dir_entry *ent;
566
567 if (!stv680_proc_entry || !stv680)
568 return -1;
569
570 sprintf (name, "video%d", stv680->vdev.minor);
571
572 ent = create_proc_entry (name, S_IFREG | S_IRUGO | S_IWUSR, stv680_proc_entry);
573 if (!ent)
574 return -1;
575
576 ent->data = stv680;
577 ent->read_proc = stv680_read_proc;
578 stv680->proc_entry = ent;
579 return 0;
580}
581
582static void destroy_proc_stv680_cam (struct usb_stv *stv680)
583{
584
585 char name[9];
586
587 if (!stv680 || !stv680->proc_entry)
588 return;
589
590 sprintf (name, "video%d", stv680->vdev.minor);
591 remove_proc_entry (name, stv680_proc_entry);
592 stv680->proc_entry = NULL;
593}
594
595static int proc_stv680_create (void)
596{
597 if (video_proc_entry == NULL) {
598 PDEBUG (0, "STV(e): /proc/video/ doesn't exist!");
599 return -1;
600 }
601 stv680_proc_entry = create_proc_entry ("stv680", S_IFDIR, video_proc_entry);
602
603 if (stv680_proc_entry) {
604 stv680_proc_entry->owner = THIS_MODULE;
605 } else {
606 PDEBUG (0, "STV(e): Unable to initialize /proc/video/stv680");
607 return -1;
608 }
609 return 0;
610}
611
612static void proc_stv680_destroy (void)
613{
614 if (stv680_proc_entry == NULL)
615 return;
616
617 remove_proc_entry ("stv680", video_proc_entry);
618}
619#endif
620
621
622
623
624
625static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
626{
627
628
629 p->brightness = stv680->brightness;
630 p->whiteness = stv680->whiteness;
631 p->colour = stv680->colour;
632 p->contrast = stv680->contrast;
633 p->hue = stv680->hue;
634 p->palette = stv680->palette;
635 p->depth = stv680->depth;
636 return 0;
637}
638
639static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
640{
641
642
643 if (p->palette != STV_VIDEO_PALETTE) {
644 PDEBUG (2, "STV(e): Palette set error in _set_pic");
645 return 1;
646 }
647
648 if (stv680->brightness != p->brightness) {
649 stv680->chgbright = 1;
650 stv680->brightness = p->brightness;
651 }
652
653 stv680->whiteness = p->whiteness;
654 stv680->colour = p->colour;
655 stv680->contrast = p->contrast;
656 stv680->hue = p->hue;
657 stv680->palette = p->palette;
658 stv680->depth = p->depth;
659
660 return 0;
661}
662
663static void stv680_video_irq (struct urb *urb)
664{
665 struct usb_stv *stv680 = urb->context;
666 int length = urb->actual_length;
667
668 if (length < stv680->rawbufsize)
669 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
670
671
672 if (!stv680->streaming)
673 return;
674
675 if (!stv680->udev) {
676 PDEBUG (0, "STV(e): device vapourished in video_irq");
677 return;
678 }
679
680
681
682
683 if (length && !urb->status) {
684 stv680->nullpackets = 0;
685 switch (stv680->scratch[stv680->scratch_next].state) {
686 case BUFFER_READY:
687 case BUFFER_BUSY:
688 stv680->dropped++;
689 break;
690
691 case BUFFER_UNUSED:
692 memcpy (stv680->scratch[stv680->scratch_next].data,
693 (unsigned char *) urb->transfer_buffer, length);
694 stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
695 stv680->scratch[stv680->scratch_next].length = length;
696 if (waitqueue_active (&stv680->wq)) {
697 wake_up_interruptible (&stv680->wq);
698 }
699 stv680->scratch_overflow = 0;
700 stv680->scratch_next++;
701 if (stv680->scratch_next >= STV680_NUMSCRATCH)
702 stv680->scratch_next = 0;;
703 break;
704 }
705 } else {
706 stv680->nullpackets++;
707 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
708 if (waitqueue_active (&stv680->wq)) {
709 wake_up_interruptible (&stv680->wq);
710 }
711 }
712 }
713
714
715 urb->status = 0;
716 urb->dev = stv680->udev;
717 if (usb_submit_urb (urb))
718 PDEBUG (0, "STV(e): urb burned down in video irq");
719 return;
720}
721
722static int stv680_start_stream (struct usb_stv *stv680)
723{
724 struct urb *urb;
725 int err = 0, i;
726
727 stv680->streaming = 1;
728
729
730 for (i = 0; i < STV680_NUMFRAMES; i++) {
731 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
732 stv680->frame[i].curpix = 0;
733 }
734
735 for (i = 0; i < STV680_NUMSBUF; i++) {
736 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
737 if (stv680->sbuf[i].data == NULL) {
738 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
739 return -1;
740 }
741 }
742
743 stv680->scratch_next = 0;
744 stv680->scratch_use = 0;
745 stv680->scratch_overflow = 0;
746 for (i = 0; i < STV680_NUMSCRATCH; i++) {
747 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
748 if (stv680->scratch[i].data == NULL) {
749 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
750 return -1;
751 }
752 stv680->scratch[i].state = BUFFER_UNUSED;
753 }
754
755 for (i = 0; i < STV680_NUMSBUF; i++) {
756 urb = usb_alloc_urb (0);
757 if (!urb)
758 return -ENOMEM;
759
760
761 usb_fill_bulk_urb (urb, stv680->udev,
762 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
763 stv680->sbuf[i].data, stv680->rawbufsize,
764 stv680_video_irq, stv680);
765 urb->timeout = PENCAM_TIMEOUT * 2;
766 urb->transfer_flags |= USB_QUEUE_BULK;
767 stv680->urb[i] = urb;
768 err = usb_submit_urb (stv680->urb[i]);
769 if (err)
770 PDEBUG (0, "STV(e): urb burned down in start stream");
771 }
772
773 stv680->framecount = 0;
774 return 0;
775}
776
777static int stv680_stop_stream (struct usb_stv *stv680)
778{
779 int i;
780
781 if (!stv680->streaming || !stv680->udev)
782 return 1;
783
784 stv680->streaming = 0;
785
786 for (i = 0; i < STV680_NUMSBUF; i++)
787 if (stv680->urb[i]) {
788 stv680->urb[i]->next = NULL;
789 usb_unlink_urb (stv680->urb[i]);
790 usb_free_urb (stv680->urb[i]);
791 stv680->urb[i] = NULL;
792 kfree (stv680->sbuf[i].data);
793 }
794 for (i = 0; i < STV680_NUMSCRATCH; i++) {
795 kfree (stv680->scratch[i].data);
796 stv680->scratch[i].data = NULL;
797 }
798
799 return 0;
800}
801
802static int stv680_set_size (struct usb_stv *stv680, int width, int height)
803{
804 int wasstreaming = stv680->streaming;
805
806
807 if ((stv680->vwidth == width) && (stv680->vheight == height))
808 return 0;
809
810 PDEBUG (1, "STV(i): size request for %i x %i", width, height);
811
812 if ((!width || !height) || ((width & 1) || (height & 1))) {
813 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);
814 return 1;
815 }
816
817 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
818 width = stv680->maxwidth / 2;
819 height = stv680->maxheight / 2;
820 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
821 width = 160;
822 height = 120;
823 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
824 width = 176;
825 height = 144;
826 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
827 width = 320;
828 height = 240;
829 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
830 width = 352;
831 height = 288;
832 } else {
833 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);
834 return 1;
835 }
836
837
838 if (wasstreaming)
839 stv680_stop_stream (stv680);
840 stv680->vwidth = width;
841 stv680->vheight = height;
842 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
843 if (wasstreaming)
844 stv680_start_stream (stv680);
845
846 return 0;
847}
848
849
850
851
852
853
854
855
856
857
858
859
860#define RED 0
861#define GREEN 1
862#define BLUE 2
863#define AD(x, y, w) (((y)*(w)+(x))*3)
864
865static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
866{
867 int x, y, i;
868 int w = stv680->cwidth;
869 int vw = stv680->cwidth, vh = stv680->cheight;
870 unsigned int p = 0;
871 int colour = 0, bayer = 0;
872 unsigned char *raw = buffer->data;
873 struct stv680_frame *frame = &stv680->frame[stv680->curframe];
874 unsigned char *output = frame->data;
875 unsigned char *temp = frame->data;
876 int offset = buffer->offset;
877
878 if (frame->curpix == 0) {
879 if (frame->grabstate == FRAME_READY) {
880 frame->grabstate = FRAME_GRABBING;
881 }
882 }
883 if (offset != frame->curpix) {
884 frame->curpix = 0;
885 stv680->error++;
886 return;
887 }
888
889 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
890 vw = 320;
891 vh = 240;
892 }
893 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
894 vw = 352;
895 vh = 288;
896 }
897
898 memset (output, 0, 3 * vw * vh);
899
900 for (y = 0; y < vh; y++) {
901 for (x = 0; x < vw; x++) {
902 if (x & 1)
903 p = *(raw + y * w + (x >> 1));
904 else
905 p = *(raw + y * w + (x >> 1) + (w >> 1));
906
907 if (y & 1)
908 bayer = 2;
909 else
910 bayer = 0;
911 if (x & 1)
912 bayer++;
913
914 switch (bayer) {
915 case 0:
916 case 3:
917 colour = 1;
918 break;
919 case 1:
920 colour = 0;
921 break;
922 case 2:
923 colour = 2;
924 break;
925 }
926 i = (y * vw + x) * 3;
927 *(output + i + colour) = (unsigned char) p;
928 }
929
930 }
931
932
933
934
935
936
937
938
939 for (y = 0; y < vh; y++) {
940 for (x = 0; x < vw; x++) {
941 i = (y * vw + x) * 3;
942 *(output + i) = red[*(output + i)];
943 *(output + i + 1) = green[*(output + i + 1)];
944 *(output + i + 2) = blue[*(output + i + 2)];
945 }
946 }
947
948
949 for (y = 1; y < (vh - 1); y++) {
950 for (x = 1; x < (vw - 1); x++) {
951 if (y & 1)
952 bayer = 0;
953 else
954 bayer = 2;
955 if (!(x & 1))
956 bayer++;
957
958 switch (bayer) {
959 case 0:
960 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
961 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
962 break;
963
964 case 1:
965 *(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;
966 *(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;
967 break;
968
969 case 2:
970 *(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;
971 *(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;
972 break;
973
974 case 3:
975 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
976 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
977 break;
978 }
979 }
980 }
981
982
983 i = vw * 3;
984 memcpy (output, (output + i), i);
985 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
986 for (y = 0; y < vh; y++) {
987 i = y * vw * 3;
988 memcpy ((output + i), (output + i + 3), 3);
989 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
990 }
991
992
993 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
994 i = 0;
995 for (y = 0; y < vh; y++) {
996 if (!(y & 1)) {
997 for (x = 0; x < vw; x++) {
998 p = (y * vw + x) * 3;
999 if (!(x & 1)) {
1000 *(output + i) = *(output + p);
1001 *(output + i + 1) = *(output + p + 1);
1002 *(output + i + 2) = *(output + p + 2);
1003 i += 3;
1004 }
1005 }
1006 }
1007 }
1008 }
1009
1010 if ((stv680->vwidth == 160)) {
1011 vw = 160;
1012 vh = 120;
1013 }
1014 if ((stv680->vwidth == 176)) {
1015 vw = 176;
1016 vh = 144;
1017 }
1018
1019
1020
1021
1022 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
1023 for (y = 0; y < vh; y++) {
1024 for (x = 0; x < vw; x++) {
1025 i = (y * vw + x) * 3;
1026 *(temp) = *(output + i);
1027 *(output + i) = *(output + i + 2);
1028 *(output + i + 2) = *(temp);
1029 }
1030 }
1031 }
1032
1033 if (stv680->chgbright == 1) {
1034 if (stv680->brightness >= 32767) {
1035 p = (stv680->brightness - 32767) / 256;
1036 for (x = 0; x < (vw * vh * 3); x++) {
1037 if ((*(output + x) + (unsigned char) p) > 255)
1038 *(output + x) = 255;
1039 else
1040 *(output + x) += (unsigned char) p;
1041 }
1042 } else {
1043 p = (32767 - stv680->brightness) / 256;
1044 for (x = 0; x < (vw * vh * 3); x++) {
1045 if ((unsigned char) p > *(output + x))
1046 *(output + x) = 0;
1047 else
1048 *(output + x) -= (unsigned char) p;
1049 }
1050 }
1051 }
1052
1053 frame->curpix = 0;
1054 frame->curlinepix = 0;
1055 frame->grabstate = FRAME_DONE;
1056 stv680->framecount++;
1057 stv680->readcount++;
1058 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
1059 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
1060 }
1061
1062}
1063
1064
1065
1066static int stv680_newframe (struct usb_stv *stv680, int framenr)
1067{
1068 int errors = 0;
1069
1070 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
1071 if (!stv680->frame[framenr].curpix) {
1072 errors++;
1073 }
1074 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
1075
1076 if (stv680->removed)
1077 return -ENODEV;
1078
1079 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
1080 stv680->nullpackets = 0;
1081 PDEBUG (2, "STV(i): too many null length packets, restarting capture");
1082 stv680_stop_stream (stv680);
1083 stv680_start_stream (stv680);
1084 } else {
1085 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
1086 stv680->frame[framenr].grabstate = FRAME_ERROR;
1087 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
1088 return -EIO;
1089 }
1090 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
1091
1092 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
1093
1094 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
1095 stv680->scratch_use++;
1096 if (stv680->scratch_use >= STV680_NUMSCRATCH)
1097 stv680->scratch_use = 0;
1098 if (errors > STV680_MAX_ERRORS) {
1099 errors = 0;
1100 PDEBUG (2, "STV(i): too many errors, restarting capture");
1101 stv680_stop_stream (stv680);
1102 stv680_start_stream (stv680);
1103 }
1104 }
1105 }
1106 return 0;
1107}
1108
1109
1110
1111
1112
1113static int stv_open (struct video_device *dev, int flags)
1114{
1115 struct usb_stv *stv680 = (struct usb_stv *) dev;
1116 int err = 0;
1117
1118
1119 MOD_INC_USE_COUNT;
1120 stv680->user = 1;
1121 err = stv_init (stv680);
1122
1123 if (err >= 0) {
1124 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
1125 if (!stv680->fbuf) {
1126 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
1127 err = -ENOMEM;
1128 }
1129 }
1130 if (err) {
1131 MOD_DEC_USE_COUNT;
1132 stv680->user = 0;
1133 }
1134
1135 return err;
1136}
1137
1138static void stv_close (struct video_device *dev)
1139{
1140
1141 struct usb_stv *stv680 = (struct usb_stv *) dev;
1142 int i;
1143
1144 for (i = 0; i < STV680_NUMFRAMES; i++)
1145 stv680->frame[i].grabstate = FRAME_UNUSED;
1146 if (stv680->streaming && !stv680->removed)
1147 stv680_stop_stream (stv680);
1148
1149 if ((!stv680->removed) && (i = stv_stop_video (stv680)) < 0)
1150 PDEBUG (1, "STV(e): stop_video failed in stv_close");
1151
1152 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
1153 stv680->user = 0;
1154
1155 if (stv680->removed) {
1156 video_unregister_device (&stv680->vdev);
1157 kfree (stv680);
1158 stv680 = NULL;
1159 PDEBUG (0, "STV(i): device unregistered");
1160 }
1161 MOD_DEC_USE_COUNT;
1162}
1163
1164static long stv680_write (struct video_device *dev, const char *buf, unsigned long count, int noblock)
1165{
1166 return -EINVAL;
1167}
1168
1169static int stv680_ioctl (struct video_device *vdev, unsigned int cmd, void *arg)
1170{
1171 struct usb_stv *stv680 = (struct usb_stv *) vdev;
1172
1173 if (!stv680->udev)
1174 return -EIO;
1175
1176 if (stv680->removed)
1177 return -ENODEV;
1178
1179 switch (cmd) {
1180 case VIDIOCGCAP:{
1181 struct video_capability b;
1182
1183 strcpy (b.name, stv680->camera_name);
1184 b.type = VID_TYPE_CAPTURE;
1185 b.channels = 1;
1186 b.audios = 0;
1187 b.maxwidth = stv680->maxwidth;
1188 b.maxheight = stv680->maxheight;
1189 b.minwidth = stv680->maxwidth / 2;
1190 b.minheight = stv680->maxheight / 2;
1191
1192 if (copy_to_user (arg, &b, sizeof (b))) {
1193 PDEBUG (2, "STV(e): VIDIOCGGAP failed");
1194 return -EFAULT;
1195 }
1196 return 0;
1197 }
1198 case VIDIOCGCHAN:{
1199 struct video_channel v;
1200
1201 if (copy_from_user (&v, arg, sizeof (v)))
1202 return -EFAULT;
1203 if (v.channel != 0)
1204 return -EINVAL;
1205
1206 v.flags = 0;
1207 v.tuners = 0;
1208 v.type = VIDEO_TYPE_CAMERA;
1209 strcpy (v.name, "STV Camera");
1210
1211 if (copy_to_user (arg, &v, sizeof (v))) {
1212 PDEBUG (2, "STV(e): VIDIOCGCHAN failed");
1213 return -EFAULT;
1214 }
1215 return 0;
1216 }
1217 case VIDIOCSCHAN:{
1218 int v;
1219
1220 if (copy_from_user (&v, arg, sizeof (v))) {
1221 PDEBUG (2, "STV(e): VIDIOCSCHAN failed");
1222 return -EFAULT;
1223 }
1224 if (v != 0)
1225 return -EINVAL;
1226
1227 return 0;
1228 }
1229 case VIDIOCGPICT:{
1230 struct video_picture p;
1231
1232 stv680_get_pict (stv680, &p);
1233 if (copy_to_user (arg, &p, sizeof (p))) {
1234 PDEBUG (2, "STV(e): VIDIOCGPICT failed");
1235 return -EFAULT;
1236 }
1237 return 0;
1238 }
1239 case VIDIOCSPICT:{
1240 struct video_picture p;
1241
1242 if (copy_from_user (&p, arg, sizeof (p))) {
1243 PDEBUG (2, "STV(e): VIDIOCSPICT failed");
1244 return -EFAULT;
1245 }
1246 PDEBUG (2, "STV(i): palette set to %i in VIDIOSPICT", p.palette);
1247
1248 if (stv680_set_pict (stv680, &p))
1249 return -EINVAL;
1250 return 0;
1251 }
1252 case VIDIOCSWIN:{
1253 struct video_window vw;
1254
1255 if (copy_from_user (&vw, arg, sizeof (vw)))
1256 return -EFAULT;
1257 if (vw.flags)
1258 return -EINVAL;
1259 if (vw.clipcount)
1260 return -EINVAL;
1261 if (vw.width != stv680->vwidth) {
1262 if (stv680_set_size (stv680, vw.width, vw.height)) {
1263 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
1264 return -EINVAL;
1265 }
1266 }
1267 return 0;
1268 }
1269 case VIDIOCGWIN:{
1270 struct video_window vw;
1271
1272 vw.x = 0;
1273 vw.y = 0;
1274 vw.chromakey = 0;
1275 vw.flags = 0;
1276 vw.clipcount = 0;
1277 vw.width = stv680->vwidth;
1278 vw.height = stv680->vheight;
1279
1280 if (copy_to_user (arg, &vw, sizeof (vw))) {
1281 PDEBUG (2, "STV(e): VIDIOCGWIN failed");
1282 return -EFAULT;
1283 }
1284 return 0;
1285 }
1286 case VIDIOCGMBUF:{
1287 struct video_mbuf vm;
1288 int i;
1289
1290 memset (&vm, 0, sizeof (vm));
1291 vm.size = STV680_NUMFRAMES * stv680->maxframesize;
1292 vm.frames = STV680_NUMFRAMES;
1293 for (i = 0; i < STV680_NUMFRAMES; i++)
1294 vm.offsets[i] = stv680->maxframesize * i;
1295
1296 if (copy_to_user ((void *) arg, (void *) &vm, sizeof (vm))) {
1297 PDEBUG (2, "STV(e): VIDIOCGMBUF failed");
1298 return -EFAULT;
1299 }
1300
1301 return 0;
1302 }
1303 case VIDIOCMCAPTURE:{
1304 struct video_mmap vm;
1305
1306 if (copy_from_user (&vm, arg, sizeof (vm))) {
1307 PDEBUG (2, "STV(e): VIDIOCMCAPTURE failed");
1308 return -EFAULT;
1309 }
1310 if (vm.format != STV_VIDEO_PALETTE) {
1311 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
1312 vm.format, STV_VIDEO_PALETTE);
1313 if ((vm.format == 3) && (swapRGB_on == 0)) {
1314 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
1315
1316 swapRGB = 1;
1317 }
1318 return -EINVAL;
1319 }
1320 if (vm.frame >= STV680_NUMFRAMES) {
1321 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
1322 return -EINVAL;
1323 }
1324 if ((stv680->frame[vm.frame].grabstate == FRAME_ERROR)
1325 || (stv680->frame[vm.frame].grabstate == FRAME_GRABBING)) {
1326 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
1327 stv680->frame[vm.frame].grabstate);
1328 return -EBUSY;
1329 }
1330
1331 if (stv680->vwidth != vm.width) {
1332 if (stv680_set_size (stv680, vm.width, vm.height)) {
1333 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
1334 return -EINVAL;
1335 }
1336 }
1337 stv680->frame[vm.frame].grabstate = FRAME_READY;
1338
1339 if (!stv680->streaming)
1340 stv680_start_stream (stv680);
1341
1342 return 0;
1343 }
1344 case VIDIOCSYNC:{
1345 int frame, ret = 0;
1346
1347 if (copy_from_user ((void *) &frame, arg, sizeof (int))) {
1348 PDEBUG (2, "STV(e): VIDIOCSYNC failed");
1349 return -EFAULT;
1350 }
1351 if (frame < 0 || frame >= STV680_NUMFRAMES) {
1352 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
1353 return -EINVAL;
1354 }
1355 ret = stv680_newframe (stv680, frame);
1356 stv680->frame[frame].grabstate = FRAME_UNUSED;
1357 return ret;
1358 }
1359 case VIDIOCGFBUF:{
1360 struct video_buffer vb;
1361
1362 memset (&vb, 0, sizeof (vb));
1363 vb.base = NULL;
1364
1365 if (copy_to_user ((void *) arg, (void *) &vb, sizeof (vb))) {
1366 PDEBUG (2, "STV(e): VIDIOCSYNC failed");
1367 return -EFAULT;
1368 }
1369 return 0;
1370 }
1371 case VIDIOCKEY:
1372 return 0;
1373 case VIDIOCCAPTURE:
1374 {
1375 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
1376 return -EINVAL;
1377 }
1378 case VIDIOCSFBUF:
1379 return -EINVAL;
1380 case VIDIOCGTUNER:
1381 case VIDIOCSTUNER:
1382 return -EINVAL;
1383 case VIDIOCGFREQ:
1384 case VIDIOCSFREQ:
1385 return -EINVAL;
1386 case VIDIOCGAUDIO:
1387 case VIDIOCSAUDIO:
1388 return -EINVAL;
1389 default:
1390 return -ENOIOCTLCMD;
1391 }
1392
1393 return 0;
1394}
1395
1396static int stv680_mmap (struct video_device *dev, const char *adr, unsigned long size)
1397{
1398 struct usb_stv *stv680 = (struct usb_stv *) dev;
1399 unsigned long start = (unsigned long) adr;
1400 unsigned long page, pos;
1401
1402 down (&stv680->lock);
1403
1404 if (stv680->udev == NULL) {
1405 up (&stv680->lock);
1406 return -EIO;
1407 }
1408 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
1409 & ~(PAGE_SIZE - 1))) {
1410 up (&stv680->lock);
1411 return -EINVAL;
1412 }
1413 pos = (unsigned long) stv680->fbuf;
1414 while (size > 0) {
1415 page = kvirt_to_pa (pos);
1416 if (remap_page_range (start, page, PAGE_SIZE, PAGE_SHARED)) {
1417 up (&stv680->lock);
1418 return -EAGAIN;
1419 }
1420 start += PAGE_SIZE;
1421 pos += PAGE_SIZE;
1422 if (size > PAGE_SIZE)
1423 size -= PAGE_SIZE;
1424 else
1425 size = 0;
1426 }
1427 up (&stv680->lock);
1428
1429 return 0;
1430}
1431
1432static long stv680_read (struct video_device *dev, char *buf, unsigned long count, int noblock)
1433{
1434 unsigned long int realcount = count;
1435 int ret = 0;
1436 struct usb_stv *stv680 = (struct usb_stv *) dev;
1437 unsigned long int i;
1438
1439 if (STV680_NUMFRAMES != 2) {
1440 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
1441 return -1;
1442 }
1443 if (stv680->udev == NULL)
1444 return -EIO;
1445 if (realcount > (stv680->vwidth * stv680->vheight * 3))
1446 realcount = stv680->vwidth * stv680->vheight * 3;
1447
1448
1449 if (stv680->frame[0].grabstate == FRAME_GRABBING) {
1450 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
1451 return -EBUSY;
1452 }
1453 stv680->frame[0].grabstate = FRAME_READY;
1454 stv680->frame[1].grabstate = FRAME_UNUSED;
1455 stv680->curframe = 0;
1456
1457 if (!stv680->streaming)
1458 stv680_start_stream (stv680);
1459
1460 if (!stv680->streaming) {
1461 ret = stv680_newframe (stv680, 0);
1462 }
1463
1464 ret = stv680_newframe (stv680, 0);
1465
1466 if (!ret) {
1467 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
1468 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
1469 return -EFAULT;
1470 }
1471 } else {
1472 realcount = ret;
1473 }
1474 stv680->frame[0].grabstate = FRAME_UNUSED;
1475 return realcount;
1476}
1477
1478static int stv_init_done (struct video_device *dev)
1479{
1480
1481#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
1482 if (create_proc_stv680_cam ((struct usb_stv *) dev) < 0)
1483 return -1;
1484#endif
1485 return 0;
1486}
1487
1488static struct video_device stv680_template = {
1489 owner: THIS_MODULE,
1490 name: "STV0680 USB camera",
1491 type: VID_TYPE_CAPTURE,
1492 hardware: VID_HARDWARE_SE401,
1493 open: stv_open,
1494 close: stv_close,
1495 read: stv680_read,
1496 write: stv680_write,
1497 ioctl: stv680_ioctl,
1498 mmap: stv680_mmap,
1499 initialize: stv_init_done,
1500};
1501
1502static void *stv680_probe (struct usb_device *dev, unsigned int ifnum, const struct usb_device_id *id)
1503{
1504 struct usb_interface_descriptor *interface;
1505 struct usb_stv *stv680;
1506 char *camera_name = NULL;
1507
1508
1509 if (dev->descriptor.bNumConfigurations != 1) {
1510 PDEBUG (0, "STV(e): Number of Configurations != 1");
1511 return NULL;
1512 }
1513
1514 interface = &dev->actconfig->interface[ifnum].altsetting[0];
1515
1516 if ((dev->descriptor.idVendor == USB_PENCAM_VENDOR_ID) && (dev->descriptor.idProduct == USB_PENCAM_PRODUCT_ID)) {
1517 camera_name = "STV0680";
1518 PDEBUG (0, "STV(i): STV0680 camera found.");
1519 } else {
1520 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 values.");
1521 PDEBUG (0, "STV(e): Check that the STV0680 camera is connected to the computer.");
1522 return NULL;
1523 }
1524
1525 if ((stv680 = kmalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
1526 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
1527 return NULL;
1528 }
1529
1530 memset (stv680, 0, sizeof (*stv680));
1531
1532 stv680->udev = dev;
1533 stv680->camera_name = camera_name;
1534
1535 memcpy (&stv680->vdev, &stv680_template, sizeof (stv680_template));
1536 memcpy (stv680->vdev.name, stv680->camera_name, strlen (stv680->camera_name));
1537 init_waitqueue_head (&stv680->wq);
1538 init_MUTEX (&stv680->lock);
1539 wmb ();
1540
1541 if (video_register_device (&stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1542 kfree (stv680);
1543 PDEBUG (0, "STV(e): video_register_device failed");
1544 return NULL;
1545 }
1546 PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev.minor);
1547
1548 return stv680;
1549}
1550
1551static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
1552{
1553 int i;
1554
1555 stv680->udev = NULL;
1556 stv680->frame[0].grabstate = FRAME_ERROR;
1557 stv680->frame[1].grabstate = FRAME_ERROR;
1558 stv680->streaming = 0;
1559
1560 wake_up_interruptible (&stv680->wq);
1561
1562 for (i = 0; i < STV680_NUMSBUF; i++)
1563 if (stv680->urb[i]) {
1564 stv680->urb[i]->next = NULL;
1565 usb_unlink_urb (stv680->urb[i]);
1566 usb_free_urb (stv680->urb[i]);
1567 stv680->urb[i] = NULL;
1568 kfree (stv680->sbuf[i].data);
1569 }
1570 for (i = 0; i < STV680_NUMSCRATCH; i++)
1571 if (stv680->scratch[i].data) {
1572 kfree (stv680->scratch[i].data);
1573 }
1574 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
1575
1576#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
1577 destroy_proc_stv680_cam (stv680);
1578#endif
1579
1580 kfree (stv680);
1581}
1582
1583static void stv680_disconnect (struct usb_device *dev, void *ptr)
1584{
1585 struct usb_stv *stv680 = (struct usb_stv *) ptr;
1586 int i;
1587
1588 lock_kernel ();
1589
1590 if (!stv680->user) {
1591 video_unregister_device (&stv680->vdev);
1592 usb_stv680_remove_disconnected (stv680);
1593 } else {
1594 stv680->removed = 1;
1595 for( i = 0; i < STV680_NUMSBUF; i++)
1596 usb_unlink_urb(stv680->urb[i]);
1597 wake_up_interruptible (&stv680->wq);
1598 }
1599 unlock_kernel ();
1600}
1601
1602static struct usb_driver stv680_driver = {
1603 name: "stv680",
1604 probe: stv680_probe,
1605 disconnect: stv680_disconnect,
1606 id_table: device_table
1607};
1608
1609
1610
1611
1612
1613static int __init usb_stv680_init (void)
1614{
1615#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
1616 if (proc_stv680_create () < 0)
1617 return -1;
1618#endif
1619 if (usb_register (&stv680_driver) < 0) {
1620 PDEBUG (0, "STV(e): Could not setup STV0680 driver");
1621 return -1;
1622 }
1623 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
1624
1625 info(DRIVER_DESC " " DRIVER_VERSION);
1626 return 0;
1627}
1628
1629static void __exit usb_stv680_exit (void)
1630{
1631 usb_deregister (&stv680_driver);
1632 PDEBUG (0, "STV(i): driver deregistered");
1633
1634#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
1635 proc_stv680_destroy ();
1636#endif
1637}
1638
1639module_init (usb_stv680_init);
1640module_exit (usb_stv680_exit);
1641
