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15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/errno.h>
18#include <linux/fs.h>
19#include <linux/kernel.h>
20#include <linux/slab.h>
21#include <linux/mm.h>
22#include <linux/ioport.h>
23#include <linux/init.h>
24#include <linux/sched.h>
25#include <linux/pci.h>
26#include <linux/random.h>
27#include <linux/version.h>
28#include <linux/mutex.h>
29#include <linux/videodev2.h>
30#include <linux/dma-mapping.h>
31#ifdef CONFIG_VIDEO_V4L1_COMPAT
32
33#include <linux/videodev.h>
34#endif
35#include <linux/interrupt.h>
36#include <media/videobuf-vmalloc.h>
37#include <media/v4l2-common.h>
38#include <media/v4l2-ioctl.h>
39#include <linux/kthread.h>
40#include <linux/highmem.h>
41#include <linux/freezer.h>
42
43#define VIVI_MODULE_NAME "vivi"
44
45
46#define WAKE_NUMERATOR 30
47#define WAKE_DENOMINATOR 1001
48#define BUFFER_TIMEOUT msecs_to_jiffies(500)
49
50#include "font.h"
51
52#define VIVI_MAJOR_VERSION 0
53#define VIVI_MINOR_VERSION 5
54#define VIVI_RELEASE 0
55#define VIVI_VERSION \
56 KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
57
58
59static unsigned int vid_limit = 16;
60static int video_nr = -1;
61static int n_devs = 1;
62
63
64static struct v4l2_queryctrl vivi_qctrl[] = {
65 {
66 .id = V4L2_CID_AUDIO_VOLUME,
67 .name = "Volume",
68 .minimum = 0,
69 .maximum = 65535,
70 .step = 65535/100,
71 .default_value = 65535,
72 .flags = 0,
73 .type = V4L2_CTRL_TYPE_INTEGER,
74 }, {
75 .id = V4L2_CID_BRIGHTNESS,
76 .type = V4L2_CTRL_TYPE_INTEGER,
77 .name = "Brightness",
78 .minimum = 0,
79 .maximum = 255,
80 .step = 1,
81 .default_value = 127,
82 .flags = 0,
83 }, {
84 .id = V4L2_CID_CONTRAST,
85 .type = V4L2_CTRL_TYPE_INTEGER,
86 .name = "Contrast",
87 .minimum = 0,
88 .maximum = 255,
89 .step = 0x1,
90 .default_value = 0x10,
91 .flags = 0,
92 }, {
93 .id = V4L2_CID_SATURATION,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "Saturation",
96 .minimum = 0,
97 .maximum = 255,
98 .step = 0x1,
99 .default_value = 127,
100 .flags = 0,
101 }, {
102 .id = V4L2_CID_HUE,
103 .type = V4L2_CTRL_TYPE_INTEGER,
104 .name = "Hue",
105 .minimum = -128,
106 .maximum = 127,
107 .step = 0x1,
108 .default_value = 0,
109 .flags = 0,
110 }
111};
112
113static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
114
115#define dprintk(dev, level, fmt, arg...) \
116 do { \
117 if (dev->vfd->debug >= (level)) \
118 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
119 } while (0)
120
121
122
123
124
125struct vivi_fmt {
126 char *name;
127 u32 fourcc;
128 int depth;
129};
130
131static struct vivi_fmt formats[] = {
132 {
133 .name = "4:2:2, packed, YUYV",
134 .fourcc = V4L2_PIX_FMT_YUYV,
135 .depth = 16,
136 },
137 {
138 .name = "4:2:2, packed, UYVY",
139 .fourcc = V4L2_PIX_FMT_UYVY,
140 .depth = 16,
141 },
142 {
143 .name = "RGB565 (LE)",
144 .fourcc = V4L2_PIX_FMT_RGB565,
145 .depth = 16,
146 },
147 {
148 .name = "RGB565 (BE)",
149 .fourcc = V4L2_PIX_FMT_RGB565X,
150 .depth = 16,
151 },
152 {
153 .name = "RGB555 (LE)",
154 .fourcc = V4L2_PIX_FMT_RGB555,
155 .depth = 16,
156 },
157 {
158 .name = "RGB555 (BE)",
159 .fourcc = V4L2_PIX_FMT_RGB555X,
160 .depth = 16,
161 },
162};
163
164static struct vivi_fmt *get_format(struct v4l2_format *f)
165{
166 struct vivi_fmt *fmt;
167 unsigned int k;
168
169 for (k = 0; k < ARRAY_SIZE(formats); k++) {
170 fmt = &formats[k];
171 if (fmt->fourcc == f->fmt.pix.pixelformat)
172 break;
173 }
174
175 if (k == ARRAY_SIZE(formats))
176 return NULL;
177
178 return &formats[k];
179}
180
181struct sg_to_addr {
182 int pos;
183 struct scatterlist *sg;
184};
185
186
187struct vivi_buffer {
188
189 struct videobuf_buffer vb;
190
191 struct vivi_fmt *fmt;
192};
193
194struct vivi_dmaqueue {
195 struct list_head active;
196
197
198 struct task_struct *kthread;
199 wait_queue_head_t wq;
200
201 int frame;
202 int ini_jiffies;
203};
204
205static LIST_HEAD(vivi_devlist);
206
207struct vivi_dev {
208 struct list_head vivi_devlist;
209
210 spinlock_t slock;
211 struct mutex mutex;
212
213 int users;
214
215
216 struct video_device *vfd;
217
218 struct vivi_dmaqueue vidq;
219
220
221 int h, m, s, ms;
222 unsigned long jiffies;
223 char timestr[13];
224
225 int mv_count;
226};
227
228struct vivi_fh {
229 struct vivi_dev *dev;
230
231
232 struct vivi_fmt *fmt;
233 unsigned int width, height;
234 struct videobuf_queue vb_vidq;
235
236 enum v4l2_buf_type type;
237 unsigned char bars[8][3];
238};
239
240
241
242
243
244
245
246enum colors {
247 WHITE,
248 AMBAR,
249 CYAN,
250 GREEN,
251 MAGENTA,
252 RED,
253 BLUE,
254 BLACK,
255};
256
257static u8 bars[8][3] = {
258
259 {204, 204, 204},
260 {208, 208, 0},
261 { 0, 206, 206},
262 { 0, 239, 0},
263 {239, 0, 239},
264 {205, 0, 0},
265 { 0, 0, 255},
266 { 0, 0, 0},
267};
268
269#define TO_Y(r, g, b) \
270 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
271
272#define TO_V(r, g, b) \
273 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
274
275#define TO_U(r, g, b) \
276 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
277
278#define TSTAMP_MIN_Y 24
279#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
280#define TSTAMP_MIN_X 64
281
282static void gen_twopix(struct vivi_fh *fh, unsigned char *buf, int colorpos)
283{
284 unsigned char r_y, g_u, b_v;
285 unsigned char *p;
286 int color;
287
288 r_y = fh->bars[colorpos][0];
289 g_u = fh->bars[colorpos][1];
290 b_v = fh->bars[colorpos][2];
291
292 for (color = 0; color < 4; color++) {
293 p = buf + color;
294
295 switch (fh->fmt->fourcc) {
296 case V4L2_PIX_FMT_YUYV:
297 switch (color) {
298 case 0:
299 case 2:
300 *p = r_y;
301 break;
302 case 1:
303 *p = g_u;
304 break;
305 case 3:
306 *p = b_v;
307 break;
308 }
309 break;
310 case V4L2_PIX_FMT_UYVY:
311 switch (color) {
312 case 1:
313 case 3:
314 *p = r_y;
315 break;
316 case 0:
317 *p = g_u;
318 break;
319 case 2:
320 *p = b_v;
321 break;
322 }
323 break;
324 case V4L2_PIX_FMT_RGB565:
325 switch (color) {
326 case 0:
327 case 2:
328 *p = (g_u << 5) | b_v;
329 break;
330 case 1:
331 case 3:
332 *p = (r_y << 3) | (g_u >> 3);
333 break;
334 }
335 break;
336 case V4L2_PIX_FMT_RGB565X:
337 switch (color) {
338 case 0:
339 case 2:
340 *p = (r_y << 3) | (g_u >> 3);
341 break;
342 case 1:
343 case 3:
344 *p = (g_u << 5) | b_v;
345 break;
346 }
347 break;
348 case V4L2_PIX_FMT_RGB555:
349 switch (color) {
350 case 0:
351 case 2:
352 *p = (g_u << 5) | b_v;
353 break;
354 case 1:
355 case 3:
356 *p = (r_y << 2) | (g_u >> 3);
357 break;
358 }
359 break;
360 case V4L2_PIX_FMT_RGB555X:
361 switch (color) {
362 case 0:
363 case 2:
364 *p = (r_y << 2) | (g_u >> 3);
365 break;
366 case 1:
367 case 3:
368 *p = (g_u << 5) | b_v;
369 break;
370 }
371 break;
372 }
373 }
374}
375
376static void gen_line(struct vivi_fh *fh, char *basep, int inipos, int wmax,
377 int hmax, int line, int count, char *timestr)
378{
379 int w, i, j;
380 int pos = inipos;
381 char *s;
382 u8 chr;
383
384
385 wmax /= 2;
386
387
388 for (w = 0; w < wmax; w++) {
389 int colorpos = ((w + count) * 8/(wmax + 1)) % 8;
390
391 gen_twopix(fh, basep + pos, colorpos);
392 pos += 4;
393 }
394
395
396 if (TSTAMP_MAX_Y >= hmax)
397 goto end;
398 if (TSTAMP_MIN_X + strlen(timestr) >= wmax)
399 goto end;
400
401
402 if (line >= TSTAMP_MIN_Y && line <= TSTAMP_MAX_Y) {
403 j = TSTAMP_MIN_X;
404 for (s = timestr; *s; s++) {
405 chr = rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
406 for (i = 0; i < 7; i++) {
407 pos = inipos + j * 2;
408
409 if (chr & 1 << (7 - i))
410 gen_twopix(fh, basep + pos, WHITE);
411 else
412 gen_twopix(fh, basep + pos, BLACK);
413 j++;
414 }
415 }
416 }
417
418end:
419 return;
420}
421
422static void vivi_fillbuff(struct vivi_fh *fh, struct vivi_buffer *buf)
423{
424 struct vivi_dev *dev = fh->dev;
425 int h , pos = 0;
426 int hmax = buf->vb.height;
427 int wmax = buf->vb.width;
428 struct timeval ts;
429 char *tmpbuf;
430 void *vbuf = videobuf_to_vmalloc(&buf->vb);
431
432 if (!vbuf)
433 return;
434
435 tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
436 if (!tmpbuf)
437 return;
438
439 for (h = 0; h < hmax; h++) {
440 gen_line(fh, tmpbuf, 0, wmax, hmax, h, dev->mv_count,
441 dev->timestr);
442 memcpy(vbuf + pos, tmpbuf, wmax * 2);
443 pos += wmax*2;
444 }
445
446 dev->mv_count++;
447
448 kfree(tmpbuf);
449
450
451
452 dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
453 dev->jiffies = jiffies;
454 if (dev->ms >= 1000) {
455 dev->ms -= 1000;
456 dev->s++;
457 if (dev->s >= 60) {
458 dev->s -= 60;
459 dev->m++;
460 if (dev->m > 60) {
461 dev->m -= 60;
462 dev->h++;
463 if (dev->h > 24)
464 dev->h -= 24;
465 }
466 }
467 }
468 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
469 dev->h, dev->m, dev->s, dev->ms);
470
471 dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
472 dev->timestr, (unsigned long)tmpbuf, pos);
473
474
475 buf->vb.field_count++;
476 do_gettimeofday(&ts);
477 buf->vb.ts = ts;
478 buf->vb.state = VIDEOBUF_DONE;
479}
480
481static void vivi_thread_tick(struct vivi_fh *fh)
482{
483 struct vivi_buffer *buf;
484 struct vivi_dev *dev = fh->dev;
485 struct vivi_dmaqueue *dma_q = &dev->vidq;
486
487 unsigned long flags = 0;
488
489 dprintk(dev, 1, "Thread tick\n");
490
491 spin_lock_irqsave(&dev->slock, flags);
492 if (list_empty(&dma_q->active)) {
493 dprintk(dev, 1, "No active queue to serve\n");
494 goto unlock;
495 }
496
497 buf = list_entry(dma_q->active.next,
498 struct vivi_buffer, vb.queue);
499
500
501 if (!waitqueue_active(&buf->vb.done))
502 goto unlock;
503
504 list_del(&buf->vb.queue);
505
506 do_gettimeofday(&buf->vb.ts);
507
508
509 vivi_fillbuff(fh, buf);
510 dprintk(dev, 1, "filled buffer %p\n", buf);
511
512 wake_up(&buf->vb.done);
513 dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
514unlock:
515 spin_unlock_irqrestore(&dev->slock, flags);
516 return;
517}
518
519#define frames_to_ms(frames) \
520 ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
521
522static void vivi_sleep(struct vivi_fh *fh)
523{
524 struct vivi_dev *dev = fh->dev;
525 struct vivi_dmaqueue *dma_q = &dev->vidq;
526 int timeout;
527 DECLARE_WAITQUEUE(wait, current);
528
529 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
530 (unsigned long)dma_q);
531
532 add_wait_queue(&dma_q->wq, &wait);
533 if (kthread_should_stop())
534 goto stop_task;
535
536
537 timeout = msecs_to_jiffies(frames_to_ms(1));
538
539 vivi_thread_tick(fh);
540
541 schedule_timeout_interruptible(timeout);
542
543stop_task:
544 remove_wait_queue(&dma_q->wq, &wait);
545 try_to_freeze();
546}
547
548static int vivi_thread(void *data)
549{
550 struct vivi_fh *fh = data;
551 struct vivi_dev *dev = fh->dev;
552
553 dprintk(dev, 1, "thread started\n");
554
555 set_freezable();
556
557 for (;;) {
558 vivi_sleep(fh);
559
560 if (kthread_should_stop())
561 break;
562 }
563 dprintk(dev, 1, "thread: exit\n");
564 return 0;
565}
566
567static int vivi_start_thread(struct vivi_fh *fh)
568{
569 struct vivi_dev *dev = fh->dev;
570 struct vivi_dmaqueue *dma_q = &dev->vidq;
571
572 dma_q->frame = 0;
573 dma_q->ini_jiffies = jiffies;
574
575 dprintk(dev, 1, "%s\n", __func__);
576
577 dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
578
579 if (IS_ERR(dma_q->kthread)) {
580 printk(KERN_ERR "vivi: kernel_thread() failed\n");
581 return PTR_ERR(dma_q->kthread);
582 }
583
584 wake_up_interruptible(&dma_q->wq);
585
586 dprintk(dev, 1, "returning from %s\n", __func__);
587 return 0;
588}
589
590static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
591{
592 struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
593
594 dprintk(dev, 1, "%s\n", __func__);
595
596 if (dma_q->kthread) {
597 kthread_stop(dma_q->kthread);
598 dma_q->kthread = NULL;
599 }
600}
601
602
603
604
605static int
606buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
607{
608 struct vivi_fh *fh = vq->priv_data;
609 struct vivi_dev *dev = fh->dev;
610
611 *size = fh->width*fh->height*2;
612
613 if (0 == *count)
614 *count = 32;
615
616 while (*size * *count > vid_limit * 1024 * 1024)
617 (*count)--;
618
619 dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
620 *count, *size);
621
622 return 0;
623}
624
625static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
626{
627 struct vivi_fh *fh = vq->priv_data;
628 struct vivi_dev *dev = fh->dev;
629
630 dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
631
632 if (in_interrupt())
633 BUG();
634
635 videobuf_vmalloc_free(&buf->vb);
636 dprintk(dev, 1, "free_buffer: freed\n");
637 buf->vb.state = VIDEOBUF_NEEDS_INIT;
638}
639
640#define norm_maxw() 1024
641#define norm_maxh() 768
642static int
643buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
644 enum v4l2_field field)
645{
646 struct vivi_fh *fh = vq->priv_data;
647 struct vivi_dev *dev = fh->dev;
648 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
649 int rc;
650
651 dprintk(dev, 1, "%s, field=%d\n", __func__, field);
652
653 BUG_ON(NULL == fh->fmt);
654
655 if (fh->width < 48 || fh->width > norm_maxw() ||
656 fh->height < 32 || fh->height > norm_maxh())
657 return -EINVAL;
658
659 buf->vb.size = fh->width*fh->height*2;
660 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
661 return -EINVAL;
662
663
664 buf->fmt = fh->fmt;
665 buf->vb.width = fh->width;
666 buf->vb.height = fh->height;
667 buf->vb.field = field;
668
669 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
670 rc = videobuf_iolock(vq, &buf->vb, NULL);
671 if (rc < 0)
672 goto fail;
673 }
674
675 buf->vb.state = VIDEOBUF_PREPARED;
676
677 return 0;
678
679fail:
680 free_buffer(vq, buf);
681 return rc;
682}
683
684static void
685buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
686{
687 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
688 struct vivi_fh *fh = vq->priv_data;
689 struct vivi_dev *dev = fh->dev;
690 struct vivi_dmaqueue *vidq = &dev->vidq;
691
692 dprintk(dev, 1, "%s\n", __func__);
693
694 buf->vb.state = VIDEOBUF_QUEUED;
695 list_add_tail(&buf->vb.queue, &vidq->active);
696}
697
698static void buffer_release(struct videobuf_queue *vq,
699 struct videobuf_buffer *vb)
700{
701 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
702 struct vivi_fh *fh = vq->priv_data;
703 struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
704
705 dprintk(dev, 1, "%s\n", __func__);
706
707 free_buffer(vq, buf);
708}
709
710static struct videobuf_queue_ops vivi_video_qops = {
711 .buf_setup = buffer_setup,
712 .buf_prepare = buffer_prepare,
713 .buf_queue = buffer_queue,
714 .buf_release = buffer_release,
715};
716
717
718
719
720static int vidioc_querycap(struct file *file, void *priv,
721 struct v4l2_capability *cap)
722{
723 strcpy(cap->driver, "vivi");
724 strcpy(cap->card, "vivi");
725 cap->version = VIVI_VERSION;
726 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
727 V4L2_CAP_STREAMING |
728 V4L2_CAP_READWRITE;
729 return 0;
730}
731
732static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
733 struct v4l2_fmtdesc *f)
734{
735 struct vivi_fmt *fmt;
736
737 if (f->index >= ARRAY_SIZE(formats))
738 return -EINVAL;
739
740 fmt = &formats[f->index];
741
742 strlcpy(f->description, fmt->name, sizeof(f->description));
743 f->pixelformat = fmt->fourcc;
744 return 0;
745}
746
747static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
748 struct v4l2_format *f)
749{
750 struct vivi_fh *fh = priv;
751
752 f->fmt.pix.width = fh->width;
753 f->fmt.pix.height = fh->height;
754 f->fmt.pix.field = fh->vb_vidq.field;
755 f->fmt.pix.pixelformat = fh->fmt->fourcc;
756 f->fmt.pix.bytesperline =
757 (f->fmt.pix.width * fh->fmt->depth) >> 3;
758 f->fmt.pix.sizeimage =
759 f->fmt.pix.height * f->fmt.pix.bytesperline;
760
761 return (0);
762}
763
764static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
765 struct v4l2_format *f)
766{
767 struct vivi_fh *fh = priv;
768 struct vivi_dev *dev = fh->dev;
769 struct vivi_fmt *fmt;
770 enum v4l2_field field;
771 unsigned int maxw, maxh;
772
773 fmt = get_format(f);
774 if (!fmt) {
775 dprintk(dev, 1, "Fourcc format (0x%08x) invalid.\n",
776 f->fmt.pix.pixelformat);
777 return -EINVAL;
778 }
779
780 field = f->fmt.pix.field;
781
782 if (field == V4L2_FIELD_ANY) {
783 field = V4L2_FIELD_INTERLACED;
784 } else if (V4L2_FIELD_INTERLACED != field) {
785 dprintk(dev, 1, "Field type invalid.\n");
786 return -EINVAL;
787 }
788
789 maxw = norm_maxw();
790 maxh = norm_maxh();
791
792 f->fmt.pix.field = field;
793 if (f->fmt.pix.height < 32)
794 f->fmt.pix.height = 32;
795 if (f->fmt.pix.height > maxh)
796 f->fmt.pix.height = maxh;
797 if (f->fmt.pix.width < 48)
798 f->fmt.pix.width = 48;
799 if (f->fmt.pix.width > maxw)
800 f->fmt.pix.width = maxw;
801 f->fmt.pix.width &= ~0x03;
802 f->fmt.pix.bytesperline =
803 (f->fmt.pix.width * fmt->depth) >> 3;
804 f->fmt.pix.sizeimage =
805 f->fmt.pix.height * f->fmt.pix.bytesperline;
806
807 return 0;
808}
809
810
811static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
812 struct v4l2_format *f)
813{
814 struct vivi_fh *fh = priv;
815 struct videobuf_queue *q = &fh->vb_vidq;
816 unsigned char r, g, b;
817 int k, is_yuv;
818
819 int ret = vidioc_try_fmt_vid_cap(file, fh, f);
820 if (ret < 0)
821 return (ret);
822
823 mutex_lock(&q->vb_lock);
824
825 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
826 dprintk(fh->dev, 1, "%s queue busy\n", __func__);
827 ret = -EBUSY;
828 goto out;
829 }
830
831 fh->fmt = get_format(f);
832 fh->width = f->fmt.pix.width;
833 fh->height = f->fmt.pix.height;
834 fh->vb_vidq.field = f->fmt.pix.field;
835 fh->type = f->type;
836
837
838 for (k = 0; k < 8; k++) {
839 r = bars[k][0];
840 g = bars[k][1];
841 b = bars[k][2];
842 is_yuv = 0;
843
844 switch (fh->fmt->fourcc) {
845 case V4L2_PIX_FMT_YUYV:
846 case V4L2_PIX_FMT_UYVY:
847 is_yuv = 1;
848 break;
849 case V4L2_PIX_FMT_RGB565:
850 case V4L2_PIX_FMT_RGB565X:
851 r >>= 3;
852 g >>= 2;
853 b >>= 3;
854 break;
855 case V4L2_PIX_FMT_RGB555:
856 case V4L2_PIX_FMT_RGB555X:
857 r >>= 3;
858 g >>= 3;
859 b >>= 3;
860 break;
861 }
862
863 if (is_yuv) {
864 fh->bars[k][0] = TO_Y(r, g, b);
865 fh->bars[k][1] = TO_U(r, g, b);
866 fh->bars[k][2] = TO_V(r, g, b);
867 } else {
868 fh->bars[k][0] = r;
869 fh->bars[k][1] = g;
870 fh->bars[k][2] = b;
871 }
872 }
873
874 ret = 0;
875out:
876 mutex_unlock(&q->vb_lock);
877
878 return (ret);
879}
880
881static int vidioc_reqbufs(struct file *file, void *priv,
882 struct v4l2_requestbuffers *p)
883{
884 struct vivi_fh *fh = priv;
885
886 return (videobuf_reqbufs(&fh->vb_vidq, p));
887}
888
889static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
890{
891 struct vivi_fh *fh = priv;
892
893 return (videobuf_querybuf(&fh->vb_vidq, p));
894}
895
896static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
897{
898 struct vivi_fh *fh = priv;
899
900 return (videobuf_qbuf(&fh->vb_vidq, p));
901}
902
903static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
904{
905 struct vivi_fh *fh = priv;
906
907 return (videobuf_dqbuf(&fh->vb_vidq, p,
908 file->f_flags & O_NONBLOCK));
909}
910
911#ifdef CONFIG_VIDEO_V4L1_COMPAT
912static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
913{
914 struct vivi_fh *fh = priv;
915
916 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
917}
918#endif
919
920static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
921{
922 struct vivi_fh *fh = priv;
923
924 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
925 return -EINVAL;
926 if (i != fh->type)
927 return -EINVAL;
928
929 return videobuf_streamon(&fh->vb_vidq);
930}
931
932static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
933{
934 struct vivi_fh *fh = priv;
935
936 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
937 return -EINVAL;
938 if (i != fh->type)
939 return -EINVAL;
940
941 return videobuf_streamoff(&fh->vb_vidq);
942}
943
944static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
945{
946 return 0;
947}
948
949
950static int vidioc_enum_input(struct file *file, void *priv,
951 struct v4l2_input *inp)
952{
953 if (inp->index != 0)
954 return -EINVAL;
955
956 inp->type = V4L2_INPUT_TYPE_CAMERA;
957 inp->std = V4L2_STD_525_60;
958 strcpy(inp->name, "Camera");
959
960 return (0);
961}
962
963static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
964{
965 *i = 0;
966
967 return (0);
968}
969static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
970{
971 if (i > 0)
972 return -EINVAL;
973
974 return (0);
975}
976
977
978static int vidioc_queryctrl(struct file *file, void *priv,
979 struct v4l2_queryctrl *qc)
980{
981 int i;
982
983 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
984 if (qc->id && qc->id == vivi_qctrl[i].id) {
985 memcpy(qc, &(vivi_qctrl[i]),
986 sizeof(*qc));
987 return (0);
988 }
989
990 return -EINVAL;
991}
992
993static int vidioc_g_ctrl(struct file *file, void *priv,
994 struct v4l2_control *ctrl)
995{
996 int i;
997
998 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
999 if (ctrl->id == vivi_qctrl[i].id) {
1000 ctrl->value = qctl_regs[i];
1001 return (0);
1002 }
1003
1004 return -EINVAL;
1005}
1006static int vidioc_s_ctrl(struct file *file, void *priv,
1007 struct v4l2_control *ctrl)
1008{
1009 int i;
1010
1011 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1012 if (ctrl->id == vivi_qctrl[i].id) {
1013 if (ctrl->value < vivi_qctrl[i].minimum
1014 || ctrl->value > vivi_qctrl[i].maximum) {
1015 return (-ERANGE);
1016 }
1017 qctl_regs[i] = ctrl->value;
1018 return (0);
1019 }
1020 return -EINVAL;
1021}
1022
1023
1024
1025
1026
1027static int vivi_open(struct inode *inode, struct file *file)
1028{
1029 int minor = iminor(inode);
1030 struct vivi_dev *dev;
1031 struct vivi_fh *fh = NULL;
1032 int i;
1033 int retval = 0;
1034
1035 printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
1036
1037 lock_kernel();
1038 list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
1039 if (dev->vfd->minor == minor)
1040 goto found;
1041 unlock_kernel();
1042 return -ENODEV;
1043
1044found:
1045 mutex_lock(&dev->mutex);
1046 dev->users++;
1047
1048 if (dev->users > 1) {
1049 dev->users--;
1050 retval = -EBUSY;
1051 goto unlock;
1052 }
1053
1054 dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
1055 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1056
1057
1058 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1059 if (NULL == fh) {
1060 dev->users--;
1061 retval = -ENOMEM;
1062 goto unlock;
1063 }
1064unlock:
1065 mutex_unlock(&dev->mutex);
1066 if (retval) {
1067 unlock_kernel();
1068 return retval;
1069 }
1070
1071 file->private_data = fh;
1072 fh->dev = dev;
1073
1074 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1075 fh->fmt = &formats[0];
1076 fh->width = 640;
1077 fh->height = 480;
1078
1079
1080 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1081 qctl_regs[i] = vivi_qctrl[i].default_value;
1082
1083
1084 dev->h = 0;
1085 dev->m = 0;
1086 dev->s = 0;
1087 dev->ms = 0;
1088 dev->mv_count = 0;
1089 dev->jiffies = jiffies;
1090 sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
1091 dev->h, dev->m, dev->s, dev->ms);
1092
1093 videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
1094 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1095 sizeof(struct vivi_buffer), fh);
1096
1097 vivi_start_thread(fh);
1098 unlock_kernel();
1099
1100 return 0;
1101}
1102
1103static ssize_t
1104vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1105{
1106 struct vivi_fh *fh = file->private_data;
1107
1108 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1109 return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
1110 file->f_flags & O_NONBLOCK);
1111 }
1112 return 0;
1113}
1114
1115static unsigned int
1116vivi_poll(struct file *file, struct poll_table_struct *wait)
1117{
1118 struct vivi_fh *fh = file->private_data;
1119 struct vivi_dev *dev = fh->dev;
1120 struct videobuf_queue *q = &fh->vb_vidq;
1121
1122 dprintk(dev, 1, "%s\n", __func__);
1123
1124 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1125 return POLLERR;
1126
1127 return videobuf_poll_stream(file, q, wait);
1128}
1129
1130static int vivi_close(struct inode *inode, struct file *file)
1131{
1132 struct vivi_fh *fh = file->private_data;
1133 struct vivi_dev *dev = fh->dev;
1134 struct vivi_dmaqueue *vidq = &dev->vidq;
1135
1136 int minor = iminor(inode);
1137
1138 vivi_stop_thread(vidq);
1139 videobuf_stop(&fh->vb_vidq);
1140 videobuf_mmap_free(&fh->vb_vidq);
1141
1142 kfree(fh);
1143
1144 mutex_lock(&dev->mutex);
1145 dev->users--;
1146 mutex_unlock(&dev->mutex);
1147
1148 dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
1149 minor, dev->users);
1150
1151 return 0;
1152}
1153
1154static int vivi_release(void)
1155{
1156 struct vivi_dev *dev;
1157 struct list_head *list;
1158
1159 while (!list_empty(&vivi_devlist)) {
1160 list = vivi_devlist.next;
1161 list_del(list);
1162 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1163
1164 if (-1 != dev->vfd->minor) {
1165 printk(KERN_INFO "%s: unregistering /dev/video%d\n",
1166 VIVI_MODULE_NAME, dev->vfd->num);
1167 video_unregister_device(dev->vfd);
1168 } else {
1169 printk(KERN_INFO "%s: releasing /dev/video%d\n",
1170 VIVI_MODULE_NAME, dev->vfd->num);
1171 video_device_release(dev->vfd);
1172 }
1173
1174 kfree(dev);
1175 }
1176
1177 return 0;
1178}
1179
1180static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
1181{
1182 struct vivi_fh *fh = file->private_data;
1183 struct vivi_dev *dev = fh->dev;
1184 int ret;
1185
1186 dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1187
1188 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1189
1190 dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1191 (unsigned long)vma->vm_start,
1192 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1193 ret);
1194
1195 return ret;
1196}
1197
1198static const struct file_operations vivi_fops = {
1199 .owner = THIS_MODULE,
1200 .open = vivi_open,
1201 .release = vivi_close,
1202 .read = vivi_read,
1203 .poll = vivi_poll,
1204 .ioctl = video_ioctl2,
1205 .compat_ioctl = v4l_compat_ioctl32,
1206 .mmap = vivi_mmap,
1207 .llseek = no_llseek,
1208};
1209
1210static const struct v4l2_ioctl_ops vivi_ioctl_ops = {
1211 .vidioc_querycap = vidioc_querycap,
1212 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1213 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1214 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1215 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1216 .vidioc_reqbufs = vidioc_reqbufs,
1217 .vidioc_querybuf = vidioc_querybuf,
1218 .vidioc_qbuf = vidioc_qbuf,
1219 .vidioc_dqbuf = vidioc_dqbuf,
1220 .vidioc_s_std = vidioc_s_std,
1221 .vidioc_enum_input = vidioc_enum_input,
1222 .vidioc_g_input = vidioc_g_input,
1223 .vidioc_s_input = vidioc_s_input,
1224 .vidioc_queryctrl = vidioc_queryctrl,
1225 .vidioc_g_ctrl = vidioc_g_ctrl,
1226 .vidioc_s_ctrl = vidioc_s_ctrl,
1227 .vidioc_streamon = vidioc_streamon,
1228 .vidioc_streamoff = vidioc_streamoff,
1229#ifdef CONFIG_VIDEO_V4L1_COMPAT
1230 .vidiocgmbuf = vidiocgmbuf,
1231#endif
1232};
1233
1234static struct video_device vivi_template = {
1235 .name = "vivi",
1236 .fops = &vivi_fops,
1237 .ioctl_ops = &vivi_ioctl_ops,
1238 .minor = -1,
1239 .release = video_device_release,
1240
1241 .tvnorms = V4L2_STD_525_60,
1242 .current_norm = V4L2_STD_NTSC_M,
1243};
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257static int __init vivi_init(void)
1258{
1259 int ret = -ENOMEM, i;
1260 struct vivi_dev *dev;
1261 struct video_device *vfd;
1262
1263 if (n_devs <= 0)
1264 n_devs = 1;
1265
1266 for (i = 0; i < n_devs; i++) {
1267 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1268 if (!dev)
1269 break;
1270
1271
1272 INIT_LIST_HEAD(&dev->vidq.active);
1273 init_waitqueue_head(&dev->vidq.wq);
1274
1275
1276 spin_lock_init(&dev->slock);
1277 mutex_init(&dev->mutex);
1278
1279 vfd = video_device_alloc();
1280 if (!vfd) {
1281 kfree(dev);
1282 break;
1283 }
1284
1285 *vfd = vivi_template;
1286
1287 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1288 if (ret < 0) {
1289 video_device_release(vfd);
1290 kfree(dev);
1291
1292
1293 if (i)
1294 ret = 0;
1295
1296 break;
1297 }
1298
1299
1300 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1301
1302 snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
1303 vivi_template.name, vfd->minor);
1304
1305 if (video_nr >= 0)
1306 video_nr++;
1307
1308 dev->vfd = vfd;
1309 printk(KERN_INFO "%s: V4L2 device registered as /dev/video%d\n",
1310 VIVI_MODULE_NAME, vfd->num);
1311 }
1312
1313 if (ret < 0) {
1314 vivi_release();
1315 printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
1316 } else {
1317 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1318 "Capture Board ver %u.%u.%u successfully loaded.\n",
1319 (VIVI_VERSION >> 16) & 0xFF, (VIVI_VERSION >> 8) & 0xFF,
1320 VIVI_VERSION & 0xFF);
1321
1322
1323 n_devs = i;
1324 }
1325
1326 return ret;
1327}
1328
1329static void __exit vivi_exit(void)
1330{
1331 vivi_release();
1332}
1333
1334module_init(vivi_init);
1335module_exit(vivi_exit);
1336
1337MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1338MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1339MODULE_LICENSE("Dual BSD/GPL");
1340
1341module_param(video_nr, uint, 0444);
1342MODULE_PARM_DESC(video_nr, "video iminor start number");
1343
1344module_param(n_devs, uint, 0444);
1345MODULE_PARM_DESC(n_devs, "number of video devices to create");
1346
1347module_param_named(debug, vivi_template.debug, int, 0444);
1348MODULE_PARM_DESC(debug, "activates debug info");
1349
1350module_param(vid_limit, int, 0644);
1351MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");