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Merge branch 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / media / platform / vivi.c
1 /*
2 * Virtual Video driver - This code emulates a real video device with v4l2 api
3 *
4 * Copyright (c) 2006 by:
5 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
6 * Ted Walther <ted--a.t--enumera.com>
7 * John Sokol <sokol--a.t--videotechnology.com>
8 * http://v4l.videotechnology.com/
9 *
10 * Conversion to videobuf2 by Pawel Osciak & Marek Szyprowski
11 * Copyright (c) 2010 Samsung Electronics
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the BSD Licence, GNU General Public License
15 * as published by the Free Software Foundation; either version 2 of the
16 * License, or (at your option) any later version
17 */
18 #include <linux/module.h>
19 #include <linux/errno.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/sched.h>
23 #include <linux/slab.h>
24 #include <linux/font.h>
25 #include <linux/mutex.h>
26 #include <linux/videodev2.h>
27 #include <linux/kthread.h>
28 #include <linux/freezer.h>
29 #include <media/videobuf2-vmalloc.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-ioctl.h>
32 #include <media/v4l2-ctrls.h>
33 #include <media/v4l2-fh.h>
34 #include <media/v4l2-event.h>
35 #include <media/v4l2-common.h>
36
37 #define VIVI_MODULE_NAME "vivi"
38
39 /* Maximum allowed frame rate
40 *
41 * Vivi will allow setting timeperframe in [1/FPS_MAX - FPS_MAX/1] range.
42 *
43 * Ideally FPS_MAX should be infinity, i.e. practically UINT_MAX, but that
44 * might hit application errors when they manipulate these values.
45 *
46 * Besides, for tpf < 1ms image-generation logic should be changed, to avoid
47 * producing frames with equal content.
48 */
49 #define FPS_MAX 1000
50
51 #define MAX_WIDTH 1920
52 #define MAX_HEIGHT 1200
53
54 #define VIVI_VERSION "0.8.1"
55
56 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
57 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
58 MODULE_LICENSE("Dual BSD/GPL");
59 MODULE_VERSION(VIVI_VERSION);
60
61 static unsigned video_nr = -1;
62 module_param(video_nr, uint, 0644);
63 MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect");
64
65 static unsigned n_devs = 1;
66 module_param(n_devs, uint, 0644);
67 MODULE_PARM_DESC(n_devs, "number of video devices to create");
68
69 static unsigned debug;
70 module_param(debug, uint, 0644);
71 MODULE_PARM_DESC(debug, "activates debug info");
72
73 static unsigned int vid_limit = 16;
74 module_param(vid_limit, uint, 0644);
75 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
76
77 /* Global font descriptor */
78 static const u8 *font8x16;
79
80 /* timeperframe: min/max and default */
81 static const struct v4l2_fract
82 tpf_min = {.numerator = 1, .denominator = FPS_MAX},
83 tpf_max = {.numerator = FPS_MAX, .denominator = 1},
84 tpf_default = {.numerator = 1001, .denominator = 30000}; /* NTSC */
85
86 #define dprintk(dev, level, fmt, arg...) \
87 v4l2_dbg(level, debug, &dev->v4l2_dev, fmt, ## arg)
88
89 /* ------------------------------------------------------------------
90 Basic structures
91 ------------------------------------------------------------------*/
92
93 struct vivi_fmt {
94 const char *name;
95 u32 fourcc; /* v4l2 format id */
96 u8 depth;
97 bool is_yuv;
98 };
99
100 static const struct vivi_fmt formats[] = {
101 {
102 .name = "4:2:2, packed, YUYV",
103 .fourcc = V4L2_PIX_FMT_YUYV,
104 .depth = 16,
105 .is_yuv = true,
106 },
107 {
108 .name = "4:2:2, packed, UYVY",
109 .fourcc = V4L2_PIX_FMT_UYVY,
110 .depth = 16,
111 .is_yuv = true,
112 },
113 {
114 .name = "4:2:2, packed, YVYU",
115 .fourcc = V4L2_PIX_FMT_YVYU,
116 .depth = 16,
117 .is_yuv = true,
118 },
119 {
120 .name = "4:2:2, packed, VYUY",
121 .fourcc = V4L2_PIX_FMT_VYUY,
122 .depth = 16,
123 .is_yuv = true,
124 },
125 {
126 .name = "RGB565 (LE)",
127 .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
128 .depth = 16,
129 },
130 {
131 .name = "RGB565 (BE)",
132 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
133 .depth = 16,
134 },
135 {
136 .name = "RGB555 (LE)",
137 .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
138 .depth = 16,
139 },
140 {
141 .name = "RGB555 (BE)",
142 .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
143 .depth = 16,
144 },
145 {
146 .name = "RGB24 (LE)",
147 .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
148 .depth = 24,
149 },
150 {
151 .name = "RGB24 (BE)",
152 .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
153 .depth = 24,
154 },
155 {
156 .name = "RGB32 (LE)",
157 .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
158 .depth = 32,
159 },
160 {
161 .name = "RGB32 (BE)",
162 .fourcc = V4L2_PIX_FMT_BGR32, /* bgra */
163 .depth = 32,
164 },
165 };
166
167 static const struct vivi_fmt *__get_format(u32 pixelformat)
168 {
169 const struct vivi_fmt *fmt;
170 unsigned int k;
171
172 for (k = 0; k < ARRAY_SIZE(formats); k++) {
173 fmt = &formats[k];
174 if (fmt->fourcc == pixelformat)
175 break;
176 }
177
178 if (k == ARRAY_SIZE(formats))
179 return NULL;
180
181 return &formats[k];
182 }
183
184 static const struct vivi_fmt *get_format(struct v4l2_format *f)
185 {
186 return __get_format(f->fmt.pix.pixelformat);
187 }
188
189 /* buffer for one video frame */
190 struct vivi_buffer {
191 /* common v4l buffer stuff -- must be first */
192 struct vb2_buffer vb;
193 struct list_head list;
194 const struct vivi_fmt *fmt;
195 };
196
197 struct vivi_dmaqueue {
198 struct list_head active;
199
200 /* thread for generating video stream*/
201 struct task_struct *kthread;
202 wait_queue_head_t wq;
203 /* Counters to control fps rate */
204 int frame;
205 int ini_jiffies;
206 };
207
208 static LIST_HEAD(vivi_devlist);
209
210 struct vivi_dev {
211 struct list_head vivi_devlist;
212 struct v4l2_device v4l2_dev;
213 struct v4l2_ctrl_handler ctrl_handler;
214 struct video_device vdev;
215
216 /* controls */
217 struct v4l2_ctrl *brightness;
218 struct v4l2_ctrl *contrast;
219 struct v4l2_ctrl *saturation;
220 struct v4l2_ctrl *hue;
221 struct {
222 /* autogain/gain cluster */
223 struct v4l2_ctrl *autogain;
224 struct v4l2_ctrl *gain;
225 };
226 struct v4l2_ctrl *volume;
227 struct v4l2_ctrl *alpha;
228 struct v4l2_ctrl *button;
229 struct v4l2_ctrl *boolean;
230 struct v4l2_ctrl *int32;
231 struct v4l2_ctrl *int64;
232 struct v4l2_ctrl *menu;
233 struct v4l2_ctrl *string;
234 struct v4l2_ctrl *bitmask;
235 struct v4l2_ctrl *int_menu;
236
237 spinlock_t slock;
238 struct mutex mutex;
239
240 struct vivi_dmaqueue vidq;
241
242 /* Several counters */
243 unsigned ms;
244 unsigned long jiffies;
245 unsigned button_pressed;
246
247 int mv_count; /* Controls bars movement */
248
249 /* Input Number */
250 int input;
251
252 /* video capture */
253 const struct vivi_fmt *fmt;
254 struct v4l2_fract timeperframe;
255 unsigned int width, height;
256 struct vb2_queue vb_vidq;
257 unsigned int field_count;
258
259 u8 bars[9][3];
260 u8 line[MAX_WIDTH * 8] __attribute__((__aligned__(4)));
261 unsigned int pixelsize;
262 u8 alpha_component;
263 u32 textfg, textbg;
264 };
265
266 /* ------------------------------------------------------------------
267 DMA and thread functions
268 ------------------------------------------------------------------*/
269
270 /* Bars and Colors should match positions */
271
272 enum colors {
273 WHITE,
274 AMBER,
275 CYAN,
276 GREEN,
277 MAGENTA,
278 RED,
279 BLUE,
280 BLACK,
281 TEXT_BLACK,
282 };
283
284 /* R G B */
285 #define COLOR_WHITE {204, 204, 204}
286 #define COLOR_AMBER {208, 208, 0}
287 #define COLOR_CYAN { 0, 206, 206}
288 #define COLOR_GREEN { 0, 239, 0}
289 #define COLOR_MAGENTA {239, 0, 239}
290 #define COLOR_RED {205, 0, 0}
291 #define COLOR_BLUE { 0, 0, 255}
292 #define COLOR_BLACK { 0, 0, 0}
293
294 struct bar_std {
295 u8 bar[9][3];
296 };
297
298 /* Maximum number of bars are 10 - otherwise, the input print code
299 should be modified */
300 static const struct bar_std bars[] = {
301 { /* Standard ITU-R color bar sequence */
302 { COLOR_WHITE, COLOR_AMBER, COLOR_CYAN, COLOR_GREEN,
303 COLOR_MAGENTA, COLOR_RED, COLOR_BLUE, COLOR_BLACK, COLOR_BLACK }
304 }, {
305 { COLOR_WHITE, COLOR_AMBER, COLOR_BLACK, COLOR_WHITE,
306 COLOR_AMBER, COLOR_BLACK, COLOR_WHITE, COLOR_AMBER, COLOR_BLACK }
307 }, {
308 { COLOR_WHITE, COLOR_CYAN, COLOR_BLACK, COLOR_WHITE,
309 COLOR_CYAN, COLOR_BLACK, COLOR_WHITE, COLOR_CYAN, COLOR_BLACK }
310 }, {
311 { COLOR_WHITE, COLOR_GREEN, COLOR_BLACK, COLOR_WHITE,
312 COLOR_GREEN, COLOR_BLACK, COLOR_WHITE, COLOR_GREEN, COLOR_BLACK }
313 },
314 };
315
316 #define NUM_INPUTS ARRAY_SIZE(bars)
317
318 #define TO_Y(r, g, b) \
319 (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
320 /* RGB to V(Cr) Color transform */
321 #define TO_V(r, g, b) \
322 (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
323 /* RGB to U(Cb) Color transform */
324 #define TO_U(r, g, b) \
325 (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
326
327 /* precalculate color bar values to speed up rendering */
328 static void precalculate_bars(struct vivi_dev *dev)
329 {
330 u8 r, g, b;
331 int k, is_yuv;
332
333 for (k = 0; k < 9; k++) {
334 r = bars[dev->input].bar[k][0];
335 g = bars[dev->input].bar[k][1];
336 b = bars[dev->input].bar[k][2];
337 is_yuv = dev->fmt->is_yuv;
338
339 switch (dev->fmt->fourcc) {
340 case V4L2_PIX_FMT_RGB565:
341 case V4L2_PIX_FMT_RGB565X:
342 r >>= 3;
343 g >>= 2;
344 b >>= 3;
345 break;
346 case V4L2_PIX_FMT_RGB555:
347 case V4L2_PIX_FMT_RGB555X:
348 r >>= 3;
349 g >>= 3;
350 b >>= 3;
351 break;
352 case V4L2_PIX_FMT_YUYV:
353 case V4L2_PIX_FMT_UYVY:
354 case V4L2_PIX_FMT_YVYU:
355 case V4L2_PIX_FMT_VYUY:
356 case V4L2_PIX_FMT_RGB24:
357 case V4L2_PIX_FMT_BGR24:
358 case V4L2_PIX_FMT_RGB32:
359 case V4L2_PIX_FMT_BGR32:
360 break;
361 }
362
363 if (is_yuv) {
364 dev->bars[k][0] = TO_Y(r, g, b); /* Luma */
365 dev->bars[k][1] = TO_U(r, g, b); /* Cb */
366 dev->bars[k][2] = TO_V(r, g, b); /* Cr */
367 } else {
368 dev->bars[k][0] = r;
369 dev->bars[k][1] = g;
370 dev->bars[k][2] = b;
371 }
372 }
373 }
374
375 /* 'odd' is true for pixels 1, 3, 5, etc. and false for pixels 0, 2, 4, etc. */
376 static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd)
377 {
378 u8 r_y, g_u, b_v;
379 u8 alpha = dev->alpha_component;
380 int color;
381 u8 *p;
382
383 r_y = dev->bars[colorpos][0]; /* R or precalculated Y */
384 g_u = dev->bars[colorpos][1]; /* G or precalculated U */
385 b_v = dev->bars[colorpos][2]; /* B or precalculated V */
386
387 for (color = 0; color < dev->pixelsize; color++) {
388 p = buf + color;
389
390 switch (dev->fmt->fourcc) {
391 case V4L2_PIX_FMT_YUYV:
392 switch (color) {
393 case 0:
394 *p = r_y;
395 break;
396 case 1:
397 *p = odd ? b_v : g_u;
398 break;
399 }
400 break;
401 case V4L2_PIX_FMT_UYVY:
402 switch (color) {
403 case 0:
404 *p = odd ? b_v : g_u;
405 break;
406 case 1:
407 *p = r_y;
408 break;
409 }
410 break;
411 case V4L2_PIX_FMT_YVYU:
412 switch (color) {
413 case 0:
414 *p = r_y;
415 break;
416 case 1:
417 *p = odd ? g_u : b_v;
418 break;
419 }
420 break;
421 case V4L2_PIX_FMT_VYUY:
422 switch (color) {
423 case 0:
424 *p = odd ? g_u : b_v;
425 break;
426 case 1:
427 *p = r_y;
428 break;
429 }
430 break;
431 case V4L2_PIX_FMT_RGB565:
432 switch (color) {
433 case 0:
434 *p = (g_u << 5) | b_v;
435 break;
436 case 1:
437 *p = (r_y << 3) | (g_u >> 3);
438 break;
439 }
440 break;
441 case V4L2_PIX_FMT_RGB565X:
442 switch (color) {
443 case 0:
444 *p = (r_y << 3) | (g_u >> 3);
445 break;
446 case 1:
447 *p = (g_u << 5) | b_v;
448 break;
449 }
450 break;
451 case V4L2_PIX_FMT_RGB555:
452 switch (color) {
453 case 0:
454 *p = (g_u << 5) | b_v;
455 break;
456 case 1:
457 *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
458 break;
459 }
460 break;
461 case V4L2_PIX_FMT_RGB555X:
462 switch (color) {
463 case 0:
464 *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
465 break;
466 case 1:
467 *p = (g_u << 5) | b_v;
468 break;
469 }
470 break;
471 case V4L2_PIX_FMT_RGB24:
472 switch (color) {
473 case 0:
474 *p = r_y;
475 break;
476 case 1:
477 *p = g_u;
478 break;
479 case 2:
480 *p = b_v;
481 break;
482 }
483 break;
484 case V4L2_PIX_FMT_BGR24:
485 switch (color) {
486 case 0:
487 *p = b_v;
488 break;
489 case 1:
490 *p = g_u;
491 break;
492 case 2:
493 *p = r_y;
494 break;
495 }
496 break;
497 case V4L2_PIX_FMT_RGB32:
498 switch (color) {
499 case 0:
500 *p = alpha;
501 break;
502 case 1:
503 *p = r_y;
504 break;
505 case 2:
506 *p = g_u;
507 break;
508 case 3:
509 *p = b_v;
510 break;
511 }
512 break;
513 case V4L2_PIX_FMT_BGR32:
514 switch (color) {
515 case 0:
516 *p = b_v;
517 break;
518 case 1:
519 *p = g_u;
520 break;
521 case 2:
522 *p = r_y;
523 break;
524 case 3:
525 *p = alpha;
526 break;
527 }
528 break;
529 }
530 }
531 }
532
533 static void precalculate_line(struct vivi_dev *dev)
534 {
535 unsigned pixsize = dev->pixelsize;
536 unsigned pixsize2 = 2*pixsize;
537 int colorpos;
538 u8 *pos;
539
540 for (colorpos = 0; colorpos < 16; ++colorpos) {
541 u8 pix[8];
542 int wstart = colorpos * dev->width / 8;
543 int wend = (colorpos+1) * dev->width / 8;
544 int w;
545
546 gen_twopix(dev, &pix[0], colorpos % 8, 0);
547 gen_twopix(dev, &pix[pixsize], colorpos % 8, 1);
548
549 for (w = wstart/2*2, pos = dev->line + w*pixsize; w < wend; w += 2, pos += pixsize2)
550 memcpy(pos, pix, pixsize2);
551 }
552 }
553
554 /* need this to do rgb24 rendering */
555 typedef struct { u16 __; u8 _; } __attribute__((packed)) x24;
556
557 static void gen_text(struct vivi_dev *dev, char *basep,
558 int y, int x, char *text)
559 {
560 int line;
561 unsigned int width = dev->width;
562
563 /* Checks if it is possible to show string */
564 if (y + 16 >= dev->height || x + strlen(text) * 8 >= width)
565 return;
566
567 /* Print stream time */
568 #define PRINTSTR(PIXTYPE) do { \
569 PIXTYPE fg; \
570 PIXTYPE bg; \
571 memcpy(&fg, &dev->textfg, sizeof(PIXTYPE)); \
572 memcpy(&bg, &dev->textbg, sizeof(PIXTYPE)); \
573 \
574 for (line = 0; line < 16; line++) { \
575 PIXTYPE *pos = (PIXTYPE *)( basep + ((y + line) * width + x) * sizeof(PIXTYPE) ); \
576 u8 *s; \
577 \
578 for (s = text; *s; s++) { \
579 u8 chr = font8x16[*s * 16 + line]; \
580 \
581 pos[0] = (chr & (0x01 << 7) ? fg : bg); \
582 pos[1] = (chr & (0x01 << 6) ? fg : bg); \
583 pos[2] = (chr & (0x01 << 5) ? fg : bg); \
584 pos[3] = (chr & (0x01 << 4) ? fg : bg); \
585 pos[4] = (chr & (0x01 << 3) ? fg : bg); \
586 pos[5] = (chr & (0x01 << 2) ? fg : bg); \
587 pos[6] = (chr & (0x01 << 1) ? fg : bg); \
588 pos[7] = (chr & (0x01 << 0) ? fg : bg); \
589 \
590 pos += 8; \
591 } \
592 } \
593 } while (0)
594
595 switch (dev->pixelsize) {
596 case 2:
597 PRINTSTR(u16); break;
598 case 4:
599 PRINTSTR(u32); break;
600 case 3:
601 PRINTSTR(x24); break;
602 }
603 }
604
605 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
606 {
607 int stride = dev->width * dev->pixelsize;
608 int hmax = dev->height;
609 void *vbuf = vb2_plane_vaddr(&buf->vb, 0);
610 unsigned ms;
611 char str[100];
612 int h, line = 1;
613 u8 *linestart;
614 s32 gain;
615
616 if (!vbuf)
617 return;
618
619 linestart = dev->line + (dev->mv_count % dev->width) * dev->pixelsize;
620
621 for (h = 0; h < hmax; h++)
622 memcpy(vbuf + h * stride, linestart, stride);
623
624 /* Updates stream time */
625
626 gen_twopix(dev, (u8 *)&dev->textbg, TEXT_BLACK, /*odd=*/ 0);
627 gen_twopix(dev, (u8 *)&dev->textfg, WHITE, /*odd=*/ 0);
628
629 dev->ms += jiffies_to_msecs(jiffies - dev->jiffies);
630 dev->jiffies = jiffies;
631 ms = dev->ms;
632 snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d ",
633 (ms / (60 * 60 * 1000)) % 24,
634 (ms / (60 * 1000)) % 60,
635 (ms / 1000) % 60,
636 ms % 1000);
637 gen_text(dev, vbuf, line++ * 16, 16, str);
638 snprintf(str, sizeof(str), " %dx%d, input %d ",
639 dev->width, dev->height, dev->input);
640 gen_text(dev, vbuf, line++ * 16, 16, str);
641
642 gain = v4l2_ctrl_g_ctrl(dev->gain);
643 mutex_lock(dev->ctrl_handler.lock);
644 snprintf(str, sizeof(str), " brightness %3d, contrast %3d, saturation %3d, hue %d ",
645 dev->brightness->cur.val,
646 dev->contrast->cur.val,
647 dev->saturation->cur.val,
648 dev->hue->cur.val);
649 gen_text(dev, vbuf, line++ * 16, 16, str);
650 snprintf(str, sizeof(str), " autogain %d, gain %3d, volume %3d, alpha 0x%02x ",
651 dev->autogain->cur.val, gain, dev->volume->cur.val,
652 dev->alpha->cur.val);
653 gen_text(dev, vbuf, line++ * 16, 16, str);
654 snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
655 dev->int32->cur.val,
656 dev->int64->cur.val64,
657 dev->bitmask->cur.val);
658 gen_text(dev, vbuf, line++ * 16, 16, str);
659 snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
660 dev->boolean->cur.val,
661 dev->menu->qmenu[dev->menu->cur.val],
662 dev->string->cur.string);
663 gen_text(dev, vbuf, line++ * 16, 16, str);
664 snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
665 dev->int_menu->qmenu_int[dev->int_menu->cur.val],
666 dev->int_menu->cur.val);
667 gen_text(dev, vbuf, line++ * 16, 16, str);
668 mutex_unlock(dev->ctrl_handler.lock);
669 if (dev->button_pressed) {
670 dev->button_pressed--;
671 snprintf(str, sizeof(str), " button pressed!");
672 gen_text(dev, vbuf, line++ * 16, 16, str);
673 }
674
675 dev->mv_count += 2;
676
677 buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
678 dev->field_count++;
679 buf->vb.v4l2_buf.sequence = dev->field_count >> 1;
680 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
681 }
682
683 static void vivi_thread_tick(struct vivi_dev *dev)
684 {
685 struct vivi_dmaqueue *dma_q = &dev->vidq;
686 struct vivi_buffer *buf;
687 unsigned long flags = 0;
688
689 dprintk(dev, 1, "Thread tick\n");
690
691 spin_lock_irqsave(&dev->slock, flags);
692 if (list_empty(&dma_q->active)) {
693 dprintk(dev, 1, "No active queue to serve\n");
694 spin_unlock_irqrestore(&dev->slock, flags);
695 return;
696 }
697
698 buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
699 list_del(&buf->list);
700 spin_unlock_irqrestore(&dev->slock, flags);
701
702 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
703
704 /* Fill buffer */
705 vivi_fillbuff(dev, buf);
706 dprintk(dev, 1, "filled buffer %p\n", buf);
707
708 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
709 dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
710 }
711
712 #define frames_to_ms(dev, frames) \
713 ((frames * dev->timeperframe.numerator * 1000) / dev->timeperframe.denominator)
714
715 static void vivi_sleep(struct vivi_dev *dev)
716 {
717 struct vivi_dmaqueue *dma_q = &dev->vidq;
718 int timeout;
719 DECLARE_WAITQUEUE(wait, current);
720
721 dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
722 (unsigned long)dma_q);
723
724 add_wait_queue(&dma_q->wq, &wait);
725 if (kthread_should_stop())
726 goto stop_task;
727
728 /* Calculate time to wake up */
729 timeout = msecs_to_jiffies(frames_to_ms(dev, 1));
730
731 vivi_thread_tick(dev);
732
733 schedule_timeout_interruptible(timeout);
734
735 stop_task:
736 remove_wait_queue(&dma_q->wq, &wait);
737 try_to_freeze();
738 }
739
740 static int vivi_thread(void *data)
741 {
742 struct vivi_dev *dev = data;
743
744 dprintk(dev, 1, "thread started\n");
745
746 set_freezable();
747
748 for (;;) {
749 vivi_sleep(dev);
750
751 if (kthread_should_stop())
752 break;
753 }
754 dprintk(dev, 1, "thread: exit\n");
755 return 0;
756 }
757
758 static int vivi_start_generating(struct vivi_dev *dev)
759 {
760 struct vivi_dmaqueue *dma_q = &dev->vidq;
761
762 dprintk(dev, 1, "%s\n", __func__);
763
764 /* Resets frame counters */
765 dev->ms = 0;
766 dev->mv_count = 0;
767 dev->jiffies = jiffies;
768
769 dma_q->frame = 0;
770 dma_q->ini_jiffies = jiffies;
771 dma_q->kthread = kthread_run(vivi_thread, dev, dev->v4l2_dev.name);
772
773 if (IS_ERR(dma_q->kthread)) {
774 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
775 return PTR_ERR(dma_q->kthread);
776 }
777 /* Wakes thread */
778 wake_up_interruptible(&dma_q->wq);
779
780 dprintk(dev, 1, "returning from %s\n", __func__);
781 return 0;
782 }
783
784 static void vivi_stop_generating(struct vivi_dev *dev)
785 {
786 struct vivi_dmaqueue *dma_q = &dev->vidq;
787
788 dprintk(dev, 1, "%s\n", __func__);
789
790 /* shutdown control thread */
791 if (dma_q->kthread) {
792 kthread_stop(dma_q->kthread);
793 dma_q->kthread = NULL;
794 }
795
796 /*
797 * Typical driver might need to wait here until dma engine stops.
798 * In this case we can abort imiedetly, so it's just a noop.
799 */
800
801 /* Release all active buffers */
802 while (!list_empty(&dma_q->active)) {
803 struct vivi_buffer *buf;
804 buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
805 list_del(&buf->list);
806 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
807 dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
808 }
809 }
810 /* ------------------------------------------------------------------
811 Videobuf operations
812 ------------------------------------------------------------------*/
813 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
814 unsigned int *nbuffers, unsigned int *nplanes,
815 unsigned int sizes[], void *alloc_ctxs[])
816 {
817 struct vivi_dev *dev = vb2_get_drv_priv(vq);
818 unsigned long size;
819
820 if (fmt)
821 size = fmt->fmt.pix.sizeimage;
822 else
823 size = dev->width * dev->height * dev->pixelsize;
824
825 if (size == 0)
826 return -EINVAL;
827
828 if (0 == *nbuffers)
829 *nbuffers = 32;
830
831 while (size * *nbuffers > vid_limit * 1024 * 1024)
832 (*nbuffers)--;
833
834 *nplanes = 1;
835
836 sizes[0] = size;
837
838 /*
839 * videobuf2-vmalloc allocator is context-less so no need to set
840 * alloc_ctxs array.
841 */
842
843 dprintk(dev, 1, "%s, count=%d, size=%ld\n", __func__,
844 *nbuffers, size);
845
846 return 0;
847 }
848
849 static int buffer_prepare(struct vb2_buffer *vb)
850 {
851 struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
852 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
853 unsigned long size;
854
855 dprintk(dev, 1, "%s, field=%d\n", __func__, vb->v4l2_buf.field);
856
857 BUG_ON(NULL == dev->fmt);
858
859 /*
860 * Theses properties only change when queue is idle, see s_fmt.
861 * The below checks should not be performed here, on each
862 * buffer_prepare (i.e. on each qbuf). Most of the code in this function
863 * should thus be moved to buffer_init and s_fmt.
864 */
865 if (dev->width < 48 || dev->width > MAX_WIDTH ||
866 dev->height < 32 || dev->height > MAX_HEIGHT)
867 return -EINVAL;
868
869 size = dev->width * dev->height * dev->pixelsize;
870 if (vb2_plane_size(vb, 0) < size) {
871 dprintk(dev, 1, "%s data will not fit into plane (%lu < %lu)\n",
872 __func__, vb2_plane_size(vb, 0), size);
873 return -EINVAL;
874 }
875
876 vb2_set_plane_payload(&buf->vb, 0, size);
877
878 buf->fmt = dev->fmt;
879
880 precalculate_bars(dev);
881 precalculate_line(dev);
882
883 return 0;
884 }
885
886 static void buffer_queue(struct vb2_buffer *vb)
887 {
888 struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
889 struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
890 struct vivi_dmaqueue *vidq = &dev->vidq;
891 unsigned long flags = 0;
892
893 dprintk(dev, 1, "%s\n", __func__);
894
895 spin_lock_irqsave(&dev->slock, flags);
896 list_add_tail(&buf->list, &vidq->active);
897 spin_unlock_irqrestore(&dev->slock, flags);
898 }
899
900 static int start_streaming(struct vb2_queue *vq, unsigned int count)
901 {
902 struct vivi_dev *dev = vb2_get_drv_priv(vq);
903 dprintk(dev, 1, "%s\n", __func__);
904 return vivi_start_generating(dev);
905 }
906
907 /* abort streaming and wait for last buffer */
908 static int stop_streaming(struct vb2_queue *vq)
909 {
910 struct vivi_dev *dev = vb2_get_drv_priv(vq);
911 dprintk(dev, 1, "%s\n", __func__);
912 vivi_stop_generating(dev);
913 return 0;
914 }
915
916 static void vivi_lock(struct vb2_queue *vq)
917 {
918 struct vivi_dev *dev = vb2_get_drv_priv(vq);
919 mutex_lock(&dev->mutex);
920 }
921
922 static void vivi_unlock(struct vb2_queue *vq)
923 {
924 struct vivi_dev *dev = vb2_get_drv_priv(vq);
925 mutex_unlock(&dev->mutex);
926 }
927
928
929 static const struct vb2_ops vivi_video_qops = {
930 .queue_setup = queue_setup,
931 .buf_prepare = buffer_prepare,
932 .buf_queue = buffer_queue,
933 .start_streaming = start_streaming,
934 .stop_streaming = stop_streaming,
935 .wait_prepare = vivi_unlock,
936 .wait_finish = vivi_lock,
937 };
938
939 /* ------------------------------------------------------------------
940 IOCTL vidioc handling
941 ------------------------------------------------------------------*/
942 static int vidioc_querycap(struct file *file, void *priv,
943 struct v4l2_capability *cap)
944 {
945 struct vivi_dev *dev = video_drvdata(file);
946
947 strcpy(cap->driver, "vivi");
948 strcpy(cap->card, "vivi");
949 snprintf(cap->bus_info, sizeof(cap->bus_info),
950 "platform:%s", dev->v4l2_dev.name);
951 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
952 V4L2_CAP_READWRITE;
953 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
954 return 0;
955 }
956
957 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
958 struct v4l2_fmtdesc *f)
959 {
960 const struct vivi_fmt *fmt;
961
962 if (f->index >= ARRAY_SIZE(formats))
963 return -EINVAL;
964
965 fmt = &formats[f->index];
966
967 strlcpy(f->description, fmt->name, sizeof(f->description));
968 f->pixelformat = fmt->fourcc;
969 return 0;
970 }
971
972 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
973 struct v4l2_format *f)
974 {
975 struct vivi_dev *dev = video_drvdata(file);
976
977 f->fmt.pix.width = dev->width;
978 f->fmt.pix.height = dev->height;
979 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
980 f->fmt.pix.pixelformat = dev->fmt->fourcc;
981 f->fmt.pix.bytesperline =
982 (f->fmt.pix.width * dev->fmt->depth) >> 3;
983 f->fmt.pix.sizeimage =
984 f->fmt.pix.height * f->fmt.pix.bytesperline;
985 if (dev->fmt->is_yuv)
986 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
987 else
988 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
989 return 0;
990 }
991
992 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
993 struct v4l2_format *f)
994 {
995 struct vivi_dev *dev = video_drvdata(file);
996 const struct vivi_fmt *fmt;
997
998 fmt = get_format(f);
999 if (!fmt) {
1000 dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
1001 f->fmt.pix.pixelformat);
1002 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1003 fmt = get_format(f);
1004 }
1005
1006 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1007 v4l_bound_align_image(&f->fmt.pix.width, 48, MAX_WIDTH, 2,
1008 &f->fmt.pix.height, 32, MAX_HEIGHT, 0, 0);
1009 f->fmt.pix.bytesperline =
1010 (f->fmt.pix.width * fmt->depth) >> 3;
1011 f->fmt.pix.sizeimage =
1012 f->fmt.pix.height * f->fmt.pix.bytesperline;
1013 if (fmt->is_yuv)
1014 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1015 else
1016 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1017 f->fmt.pix.priv = 0;
1018 return 0;
1019 }
1020
1021 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1022 struct v4l2_format *f)
1023 {
1024 struct vivi_dev *dev = video_drvdata(file);
1025 struct vb2_queue *q = &dev->vb_vidq;
1026
1027 int ret = vidioc_try_fmt_vid_cap(file, priv, f);
1028 if (ret < 0)
1029 return ret;
1030
1031 if (vb2_is_busy(q)) {
1032 dprintk(dev, 1, "%s device busy\n", __func__);
1033 return -EBUSY;
1034 }
1035
1036 dev->fmt = get_format(f);
1037 dev->pixelsize = dev->fmt->depth / 8;
1038 dev->width = f->fmt.pix.width;
1039 dev->height = f->fmt.pix.height;
1040
1041 return 0;
1042 }
1043
1044 static int vidioc_enum_framesizes(struct file *file, void *fh,
1045 struct v4l2_frmsizeenum *fsize)
1046 {
1047 static const struct v4l2_frmsize_stepwise sizes = {
1048 48, MAX_WIDTH, 4,
1049 32, MAX_HEIGHT, 1
1050 };
1051 int i;
1052
1053 if (fsize->index)
1054 return -EINVAL;
1055 for (i = 0; i < ARRAY_SIZE(formats); i++)
1056 if (formats[i].fourcc == fsize->pixel_format)
1057 break;
1058 if (i == ARRAY_SIZE(formats))
1059 return -EINVAL;
1060 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1061 fsize->stepwise = sizes;
1062 return 0;
1063 }
1064
1065 /* only one input in this sample driver */
1066 static int vidioc_enum_input(struct file *file, void *priv,
1067 struct v4l2_input *inp)
1068 {
1069 if (inp->index >= NUM_INPUTS)
1070 return -EINVAL;
1071
1072 inp->type = V4L2_INPUT_TYPE_CAMERA;
1073 sprintf(inp->name, "Camera %u", inp->index);
1074 return 0;
1075 }
1076
1077 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1078 {
1079 struct vivi_dev *dev = video_drvdata(file);
1080
1081 *i = dev->input;
1082 return 0;
1083 }
1084
1085 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1086 {
1087 struct vivi_dev *dev = video_drvdata(file);
1088
1089 if (i >= NUM_INPUTS)
1090 return -EINVAL;
1091
1092 if (i == dev->input)
1093 return 0;
1094
1095 dev->input = i;
1096 /*
1097 * Modify the brightness range depending on the input.
1098 * This makes it easy to use vivi to test if applications can
1099 * handle control range modifications and is also how this is
1100 * typically used in practice as different inputs may be hooked
1101 * up to different receivers with different control ranges.
1102 */
1103 v4l2_ctrl_modify_range(dev->brightness,
1104 128 * i, 255 + 128 * i, 1, 127 + 128 * i);
1105 precalculate_bars(dev);
1106 precalculate_line(dev);
1107 return 0;
1108 }
1109
1110 /* timeperframe is arbitrary and continous */
1111 static int vidioc_enum_frameintervals(struct file *file, void *priv,
1112 struct v4l2_frmivalenum *fival)
1113 {
1114 const struct vivi_fmt *fmt;
1115
1116 if (fival->index)
1117 return -EINVAL;
1118
1119 fmt = __get_format(fival->pixel_format);
1120 if (!fmt)
1121 return -EINVAL;
1122
1123 /* regarding width & height - we support any */
1124
1125 fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
1126
1127 /* fill in stepwise (step=1.0 is requred by V4L2 spec) */
1128 fival->stepwise.min = tpf_min;
1129 fival->stepwise.max = tpf_max;
1130 fival->stepwise.step = (struct v4l2_fract) {1, 1};
1131
1132 return 0;
1133 }
1134
1135 static int vidioc_g_parm(struct file *file, void *priv,
1136 struct v4l2_streamparm *parm)
1137 {
1138 struct vivi_dev *dev = video_drvdata(file);
1139
1140 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1141 return -EINVAL;
1142
1143 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1144 parm->parm.capture.timeperframe = dev->timeperframe;
1145 parm->parm.capture.readbuffers = 1;
1146 return 0;
1147 }
1148
1149 #define FRACT_CMP(a, OP, b) \
1150 ((u64)(a).numerator * (b).denominator OP (u64)(b).numerator * (a).denominator)
1151
1152 static int vidioc_s_parm(struct file *file, void *priv,
1153 struct v4l2_streamparm *parm)
1154 {
1155 struct vivi_dev *dev = video_drvdata(file);
1156 struct v4l2_fract tpf;
1157
1158 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1159 return -EINVAL;
1160
1161 tpf = parm->parm.capture.timeperframe;
1162
1163 /* tpf: {*, 0} resets timing; clip to [min, max]*/
1164 tpf = tpf.denominator ? tpf : tpf_default;
1165 tpf = FRACT_CMP(tpf, <, tpf_min) ? tpf_min : tpf;
1166 tpf = FRACT_CMP(tpf, >, tpf_max) ? tpf_max : tpf;
1167
1168 dev->timeperframe = tpf;
1169 parm->parm.capture.timeperframe = tpf;
1170 parm->parm.capture.readbuffers = 1;
1171 return 0;
1172 }
1173
1174 /* --- controls ---------------------------------------------- */
1175
1176 static int vivi_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
1177 {
1178 struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
1179
1180 if (ctrl == dev->autogain)
1181 dev->gain->val = jiffies & 0xff;
1182 return 0;
1183 }
1184
1185 static int vivi_s_ctrl(struct v4l2_ctrl *ctrl)
1186 {
1187 struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
1188
1189 switch (ctrl->id) {
1190 case V4L2_CID_ALPHA_COMPONENT:
1191 dev->alpha_component = ctrl->val;
1192 break;
1193 default:
1194 if (ctrl == dev->button)
1195 dev->button_pressed = 30;
1196 break;
1197 }
1198 return 0;
1199 }
1200
1201 /* ------------------------------------------------------------------
1202 File operations for the device
1203 ------------------------------------------------------------------*/
1204
1205 static const struct v4l2_ctrl_ops vivi_ctrl_ops = {
1206 .g_volatile_ctrl = vivi_g_volatile_ctrl,
1207 .s_ctrl = vivi_s_ctrl,
1208 };
1209
1210 #define VIVI_CID_CUSTOM_BASE (V4L2_CID_USER_BASE | 0xf000)
1211
1212 static const struct v4l2_ctrl_config vivi_ctrl_button = {
1213 .ops = &vivi_ctrl_ops,
1214 .id = VIVI_CID_CUSTOM_BASE + 0,
1215 .name = "Button",
1216 .type = V4L2_CTRL_TYPE_BUTTON,
1217 };
1218
1219 static const struct v4l2_ctrl_config vivi_ctrl_boolean = {
1220 .ops = &vivi_ctrl_ops,
1221 .id = VIVI_CID_CUSTOM_BASE + 1,
1222 .name = "Boolean",
1223 .type = V4L2_CTRL_TYPE_BOOLEAN,
1224 .min = 0,
1225 .max = 1,
1226 .step = 1,
1227 .def = 1,
1228 };
1229
1230 static const struct v4l2_ctrl_config vivi_ctrl_int32 = {
1231 .ops = &vivi_ctrl_ops,
1232 .id = VIVI_CID_CUSTOM_BASE + 2,
1233 .name = "Integer 32 Bits",
1234 .type = V4L2_CTRL_TYPE_INTEGER,
1235 .min = 0x80000000,
1236 .max = 0x7fffffff,
1237 .step = 1,
1238 };
1239
1240 static const struct v4l2_ctrl_config vivi_ctrl_int64 = {
1241 .ops = &vivi_ctrl_ops,
1242 .id = VIVI_CID_CUSTOM_BASE + 3,
1243 .name = "Integer 64 Bits",
1244 .type = V4L2_CTRL_TYPE_INTEGER64,
1245 };
1246
1247 static const char * const vivi_ctrl_menu_strings[] = {
1248 "Menu Item 0 (Skipped)",
1249 "Menu Item 1",
1250 "Menu Item 2 (Skipped)",
1251 "Menu Item 3",
1252 "Menu Item 4",
1253 "Menu Item 5 (Skipped)",
1254 NULL,
1255 };
1256
1257 static const struct v4l2_ctrl_config vivi_ctrl_menu = {
1258 .ops = &vivi_ctrl_ops,
1259 .id = VIVI_CID_CUSTOM_BASE + 4,
1260 .name = "Menu",
1261 .type = V4L2_CTRL_TYPE_MENU,
1262 .min = 1,
1263 .max = 4,
1264 .def = 3,
1265 .menu_skip_mask = 0x04,
1266 .qmenu = vivi_ctrl_menu_strings,
1267 };
1268
1269 static const struct v4l2_ctrl_config vivi_ctrl_string = {
1270 .ops = &vivi_ctrl_ops,
1271 .id = VIVI_CID_CUSTOM_BASE + 5,
1272 .name = "String",
1273 .type = V4L2_CTRL_TYPE_STRING,
1274 .min = 2,
1275 .max = 4,
1276 .step = 1,
1277 };
1278
1279 static const struct v4l2_ctrl_config vivi_ctrl_bitmask = {
1280 .ops = &vivi_ctrl_ops,
1281 .id = VIVI_CID_CUSTOM_BASE + 6,
1282 .name = "Bitmask",
1283 .type = V4L2_CTRL_TYPE_BITMASK,
1284 .def = 0x80002000,
1285 .min = 0,
1286 .max = 0x80402010,
1287 .step = 0,
1288 };
1289
1290 static const s64 vivi_ctrl_int_menu_values[] = {
1291 1, 1, 2, 3, 5, 8, 13, 21, 42,
1292 };
1293
1294 static const struct v4l2_ctrl_config vivi_ctrl_int_menu = {
1295 .ops = &vivi_ctrl_ops,
1296 .id = VIVI_CID_CUSTOM_BASE + 7,
1297 .name = "Integer menu",
1298 .type = V4L2_CTRL_TYPE_INTEGER_MENU,
1299 .min = 1,
1300 .max = 8,
1301 .def = 4,
1302 .menu_skip_mask = 0x02,
1303 .qmenu_int = vivi_ctrl_int_menu_values,
1304 };
1305
1306 static const struct v4l2_file_operations vivi_fops = {
1307 .owner = THIS_MODULE,
1308 .open = v4l2_fh_open,
1309 .release = vb2_fop_release,
1310 .read = vb2_fop_read,
1311 .poll = vb2_fop_poll,
1312 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1313 .mmap = vb2_fop_mmap,
1314 };
1315
1316 static const struct v4l2_ioctl_ops vivi_ioctl_ops = {
1317 .vidioc_querycap = vidioc_querycap,
1318 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1319 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1320 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1321 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1322 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1323 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1324 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1325 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1326 .vidioc_querybuf = vb2_ioctl_querybuf,
1327 .vidioc_qbuf = vb2_ioctl_qbuf,
1328 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1329 .vidioc_enum_input = vidioc_enum_input,
1330 .vidioc_g_input = vidioc_g_input,
1331 .vidioc_s_input = vidioc_s_input,
1332 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
1333 .vidioc_g_parm = vidioc_g_parm,
1334 .vidioc_s_parm = vidioc_s_parm,
1335 .vidioc_streamon = vb2_ioctl_streamon,
1336 .vidioc_streamoff = vb2_ioctl_streamoff,
1337 .vidioc_log_status = v4l2_ctrl_log_status,
1338 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1339 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1340 };
1341
1342 static const struct video_device vivi_template = {
1343 .name = "vivi",
1344 .fops = &vivi_fops,
1345 .ioctl_ops = &vivi_ioctl_ops,
1346 .release = video_device_release_empty,
1347 };
1348
1349 /* -----------------------------------------------------------------
1350 Initialization and module stuff
1351 ------------------------------------------------------------------*/
1352
1353 static int vivi_release(void)
1354 {
1355 struct vivi_dev *dev;
1356 struct list_head *list;
1357
1358 while (!list_empty(&vivi_devlist)) {
1359 list = vivi_devlist.next;
1360 list_del(list);
1361 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1362
1363 v4l2_info(&dev->v4l2_dev, "unregistering %s\n",
1364 video_device_node_name(&dev->vdev));
1365 video_unregister_device(&dev->vdev);
1366 v4l2_device_unregister(&dev->v4l2_dev);
1367 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1368 kfree(dev);
1369 }
1370
1371 return 0;
1372 }
1373
1374 static int __init vivi_create_instance(int inst)
1375 {
1376 struct vivi_dev *dev;
1377 struct video_device *vfd;
1378 struct v4l2_ctrl_handler *hdl;
1379 struct vb2_queue *q;
1380 int ret;
1381
1382 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1383 if (!dev)
1384 return -ENOMEM;
1385
1386 snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name),
1387 "%s-%03d", VIVI_MODULE_NAME, inst);
1388 ret = v4l2_device_register(NULL, &dev->v4l2_dev);
1389 if (ret)
1390 goto free_dev;
1391
1392 dev->fmt = &formats[0];
1393 dev->timeperframe = tpf_default;
1394 dev->width = 640;
1395 dev->height = 480;
1396 dev->pixelsize = dev->fmt->depth / 8;
1397 hdl = &dev->ctrl_handler;
1398 v4l2_ctrl_handler_init(hdl, 11);
1399 dev->volume = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1400 V4L2_CID_AUDIO_VOLUME, 0, 255, 1, 200);
1401 dev->brightness = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1402 V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
1403 dev->contrast = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1404 V4L2_CID_CONTRAST, 0, 255, 1, 16);
1405 dev->saturation = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1406 V4L2_CID_SATURATION, 0, 255, 1, 127);
1407 dev->hue = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1408 V4L2_CID_HUE, -128, 127, 1, 0);
1409 dev->autogain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1410 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1411 dev->gain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1412 V4L2_CID_GAIN, 0, 255, 1, 100);
1413 dev->alpha = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1414 V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
1415 dev->button = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_button, NULL);
1416 dev->int32 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int32, NULL);
1417 dev->int64 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int64, NULL);
1418 dev->boolean = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_boolean, NULL);
1419 dev->menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_menu, NULL);
1420 dev->string = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_string, NULL);
1421 dev->bitmask = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_bitmask, NULL);
1422 dev->int_menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int_menu, NULL);
1423 if (hdl->error) {
1424 ret = hdl->error;
1425 goto unreg_dev;
1426 }
1427 v4l2_ctrl_auto_cluster(2, &dev->autogain, 0, true);
1428 dev->v4l2_dev.ctrl_handler = hdl;
1429
1430 /* initialize locks */
1431 spin_lock_init(&dev->slock);
1432
1433 /* initialize queue */
1434 q = &dev->vb_vidq;
1435 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1436 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
1437 q->drv_priv = dev;
1438 q->buf_struct_size = sizeof(struct vivi_buffer);
1439 q->ops = &vivi_video_qops;
1440 q->mem_ops = &vb2_vmalloc_memops;
1441 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1442
1443 ret = vb2_queue_init(q);
1444 if (ret)
1445 goto unreg_dev;
1446
1447 mutex_init(&dev->mutex);
1448
1449 /* init video dma queues */
1450 INIT_LIST_HEAD(&dev->vidq.active);
1451 init_waitqueue_head(&dev->vidq.wq);
1452
1453 vfd = &dev->vdev;
1454 *vfd = vivi_template;
1455 vfd->debug = debug;
1456 vfd->v4l2_dev = &dev->v4l2_dev;
1457 vfd->queue = q;
1458 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1459
1460 /*
1461 * Provide a mutex to v4l2 core. It will be used to protect
1462 * all fops and v4l2 ioctls.
1463 */
1464 vfd->lock = &dev->mutex;
1465 video_set_drvdata(vfd, dev);
1466
1467 ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1468 if (ret < 0)
1469 goto unreg_dev;
1470
1471 /* Now that everything is fine, let's add it to device list */
1472 list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1473
1474 v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
1475 video_device_node_name(vfd));
1476 return 0;
1477
1478 unreg_dev:
1479 v4l2_ctrl_handler_free(hdl);
1480 v4l2_device_unregister(&dev->v4l2_dev);
1481 free_dev:
1482 kfree(dev);
1483 return ret;
1484 }
1485
1486 /* This routine allocates from 1 to n_devs virtual drivers.
1487
1488 The real maximum number of virtual drivers will depend on how many drivers
1489 will succeed. This is limited to the maximum number of devices that
1490 videodev supports, which is equal to VIDEO_NUM_DEVICES.
1491 */
1492 static int __init vivi_init(void)
1493 {
1494 const struct font_desc *font = find_font("VGA8x16");
1495 int ret = 0, i;
1496
1497 if (font == NULL) {
1498 printk(KERN_ERR "vivi: could not find font\n");
1499 return -ENODEV;
1500 }
1501 font8x16 = font->data;
1502
1503 if (n_devs <= 0)
1504 n_devs = 1;
1505
1506 for (i = 0; i < n_devs; i++) {
1507 ret = vivi_create_instance(i);
1508 if (ret) {
1509 /* If some instantiations succeeded, keep driver */
1510 if (i)
1511 ret = 0;
1512 break;
1513 }
1514 }
1515
1516 if (ret < 0) {
1517 printk(KERN_ERR "vivi: error %d while loading driver\n", ret);
1518 return ret;
1519 }
1520
1521 printk(KERN_INFO "Video Technology Magazine Virtual Video "
1522 "Capture Board ver %s successfully loaded.\n",
1523 VIVI_VERSION);
1524
1525 /* n_devs will reflect the actual number of allocated devices */
1526 n_devs = i;
1527
1528 return ret;
1529 }
1530
1531 static void __exit vivi_exit(void)
1532 {
1533 vivi_release();
1534 }
1535
1536 module_init(vivi_init);
1537 module_exit(vivi_exit);
Linux kernel - Deliverables
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