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s390/ptrace: get rid of long longs in psw_bits
[linux/fpc-iii.git] / drivers / media / platform / vim2m.c
blobe18fb9f9ed2f7795414f79deed1c19f6cf334374
1 /*
2 * A virtual v4l2-mem2mem example device.
3 *
4 * This is a virtual device driver for testing mem-to-mem videobuf framework.
5 * It simulates a device that uses memory buffers for both source and
6 * destination, processes the data and issues an "irq" (simulated by a timer).
7 * The device is capable of multi-instance, multi-buffer-per-transaction
8 * operation (via the mem2mem framework).
9 *
10 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
11 * Pawel Osciak, <pawel@osciak.com>
12 * Marek Szyprowski, <m.szyprowski@samsung.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version
18 */
19 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/fs.h>
22 #include <linux/timer.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25
26 #include <linux/platform_device.h>
27 #include <media/v4l2-mem2mem.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-event.h>
32 #include <media/videobuf2-vmalloc.h>
33
34 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
35 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.1.1");
38 MODULE_ALIAS("mem2mem_testdev");
39
40 static unsigned debug;
41 module_param(debug, uint, 0644);
42 MODULE_PARM_DESC(debug, "activates debug info");
43
44 #define MIN_W 32
45 #define MIN_H 32
46 #define MAX_W 640
47 #define MAX_H 480
48 #define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
49
50 /* Flags that indicate a format can be used for capture/output */
51 #define MEM2MEM_CAPTURE (1 << 0)
52 #define MEM2MEM_OUTPUT (1 << 1)
53
54 #define MEM2MEM_NAME "vim2m"
55
56 /* Per queue */
57 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
58 /* In bytes, per queue */
59 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
60
61 /* Default transaction time in msec */
62 #define MEM2MEM_DEF_TRANSTIME 40
63 #define MEM2MEM_COLOR_STEP (0xff >> 4)
64 #define MEM2MEM_NUM_TILES 8
65
66 /* Flags that indicate processing mode */
67 #define MEM2MEM_HFLIP (1 << 0)
68 #define MEM2MEM_VFLIP (1 << 1)
69
70 #define dprintk(dev, fmt, arg...) \
71 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
72
73
74 static void vim2m_dev_release(struct device *dev)
75 {}
76
77 static struct platform_device vim2m_pdev = {
78 .name = MEM2MEM_NAME,
79 .dev.release = vim2m_dev_release,
80 };
81
82 struct vim2m_fmt {
83 u32 fourcc;
84 int depth;
85 /* Types the format can be used for */
86 u32 types;
87 };
88
89 static struct vim2m_fmt formats[] = {
90 {
91 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
92 .depth = 16,
93 /* Both capture and output format */
94 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
95 },
96 {
97 .fourcc = V4L2_PIX_FMT_YUYV,
98 .depth = 16,
99 /* Output-only format */
100 .types = MEM2MEM_OUTPUT,
101 },
102 };
103
104 #define NUM_FORMATS ARRAY_SIZE(formats)
105
106 /* Per-queue, driver-specific private data */
107 struct vim2m_q_data {
108 unsigned int width;
109 unsigned int height;
110 unsigned int sizeimage;
111 unsigned int sequence;
112 struct vim2m_fmt *fmt;
113 };
114
115 enum {
116 V4L2_M2M_SRC = 0,
117 V4L2_M2M_DST = 1,
118 };
119
120 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
121 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
122
123 static struct vim2m_fmt *find_format(struct v4l2_format *f)
124 {
125 struct vim2m_fmt *fmt;
126 unsigned int k;
127
128 for (k = 0; k < NUM_FORMATS; k++) {
129 fmt = &formats[k];
130 if (fmt->fourcc == f->fmt.pix.pixelformat)
131 break;
132 }
133
134 if (k == NUM_FORMATS)
135 return NULL;
136
137 return &formats[k];
138 }
139
140 struct vim2m_dev {
141 struct v4l2_device v4l2_dev;
142 struct video_device vfd;
143
144 atomic_t num_inst;
145 struct mutex dev_mutex;
146 spinlock_t irqlock;
147
148 struct timer_list timer;
149
150 struct v4l2_m2m_dev *m2m_dev;
151 };
152
153 struct vim2m_ctx {
154 struct v4l2_fh fh;
155 struct vim2m_dev *dev;
156
157 struct v4l2_ctrl_handler hdl;
158
159 /* Processed buffers in this transaction */
160 u8 num_processed;
161
162 /* Transaction length (i.e. how many buffers per transaction) */
163 u32 translen;
164 /* Transaction time (i.e. simulated processing time) in milliseconds */
165 u32 transtime;
166
167 /* Abort requested by m2m */
168 int aborting;
169
170 /* Processing mode */
171 int mode;
172
173 enum v4l2_colorspace colorspace;
174
175 /* Source and destination queue data */
176 struct vim2m_q_data q_data[2];
177 };
178
179 static inline struct vim2m_ctx *file2ctx(struct file *file)
180 {
181 return container_of(file->private_data, struct vim2m_ctx, fh);
182 }
183
184 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
185 enum v4l2_buf_type type)
186 {
187 switch (type) {
188 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
189 return &ctx->q_data[V4L2_M2M_SRC];
190 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
191 return &ctx->q_data[V4L2_M2M_DST];
192 default:
193 BUG();
194 }
195 return NULL;
196 }
197
198
199 static int device_process(struct vim2m_ctx *ctx,
200 struct vb2_v4l2_buffer *in_vb,
201 struct vb2_v4l2_buffer *out_vb)
202 {
203 struct vim2m_dev *dev = ctx->dev;
204 struct vim2m_q_data *q_data;
205 u8 *p_in, *p_out;
206 int x, y, t, w;
207 int tile_w, bytes_left;
208 int width, height, bytesperline;
209
210 q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
211
212 width = q_data->width;
213 height = q_data->height;
214 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
215
216 p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
217 p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
218 if (!p_in || !p_out) {
219 v4l2_err(&dev->v4l2_dev,
220 "Acquiring kernel pointers to buffers failed\n");
221 return -EFAULT;
222 }
223
224 if (vb2_plane_size(&in_vb->vb2_buf, 0) >
225 vb2_plane_size(&out_vb->vb2_buf, 0)) {
226 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
227 return -EINVAL;
228 }
229
230 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
231 / MEM2MEM_NUM_TILES;
232 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
233 w = 0;
234
235 out_vb->sequence =
236 get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
237 in_vb->sequence = q_data->sequence++;
238 out_vb->timestamp = in_vb->timestamp;
239
240 if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
241 out_vb->timecode = in_vb->timecode;
242 out_vb->field = in_vb->field;
243 out_vb->flags = in_vb->flags &
244 (V4L2_BUF_FLAG_TIMECODE |
245 V4L2_BUF_FLAG_KEYFRAME |
246 V4L2_BUF_FLAG_PFRAME |
247 V4L2_BUF_FLAG_BFRAME |
248 V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
249
250 switch (ctx->mode) {
251 case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
252 p_out += bytesperline * height - bytes_left;
253 for (y = 0; y < height; ++y) {
254 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
255 if (w & 0x1) {
256 for (x = 0; x < tile_w; ++x)
257 *--p_out = *p_in++ +
258 MEM2MEM_COLOR_STEP;
259 } else {
260 for (x = 0; x < tile_w; ++x)
261 *--p_out = *p_in++ -
262 MEM2MEM_COLOR_STEP;
263 }
264 ++w;
265 }
266 p_in += bytes_left;
267 p_out -= bytes_left;
268 }
269 break;
270
271 case MEM2MEM_HFLIP:
272 for (y = 0; y < height; ++y) {
273 p_out += MEM2MEM_NUM_TILES * tile_w;
274 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
275 if (w & 0x01) {
276 for (x = 0; x < tile_w; ++x)
277 *--p_out = *p_in++ +
278 MEM2MEM_COLOR_STEP;
279 } else {
280 for (x = 0; x < tile_w; ++x)
281 *--p_out = *p_in++ -
282 MEM2MEM_COLOR_STEP;
283 }
284 ++w;
285 }
286 p_in += bytes_left;
287 p_out += bytesperline;
288 }
289 break;
290
291 case MEM2MEM_VFLIP:
292 p_out += bytesperline * (height - 1);
293 for (y = 0; y < height; ++y) {
294 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
295 if (w & 0x1) {
296 for (x = 0; x < tile_w; ++x)
297 *p_out++ = *p_in++ +
298 MEM2MEM_COLOR_STEP;
299 } else {
300 for (x = 0; x < tile_w; ++x)
301 *p_out++ = *p_in++ -
302 MEM2MEM_COLOR_STEP;
303 }
304 ++w;
305 }
306 p_in += bytes_left;
307 p_out += bytes_left - 2 * bytesperline;
308 }
309 break;
310
311 default:
312 for (y = 0; y < height; ++y) {
313 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
314 if (w & 0x1) {
315 for (x = 0; x < tile_w; ++x)
316 *p_out++ = *p_in++ +
317 MEM2MEM_COLOR_STEP;
318 } else {
319 for (x = 0; x < tile_w; ++x)
320 *p_out++ = *p_in++ -
321 MEM2MEM_COLOR_STEP;
322 }
323 ++w;
324 }
325 p_in += bytes_left;
326 p_out += bytes_left;
327 }
328 }
329
330 return 0;
331 }
332
333 static void schedule_irq(struct vim2m_dev *dev, int msec_timeout)
334 {
335 dprintk(dev, "Scheduling a simulated irq\n");
336 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
337 }
338
339 /*
340 * mem2mem callbacks
341 */
342
343 /**
344 * job_ready() - check whether an instance is ready to be scheduled to run
345 */
346 static int job_ready(void *priv)
347 {
348 struct vim2m_ctx *ctx = priv;
349
350 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
351 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
352 dprintk(ctx->dev, "Not enough buffers available\n");
353 return 0;
354 }
355
356 return 1;
357 }
358
359 static void job_abort(void *priv)
360 {
361 struct vim2m_ctx *ctx = priv;
362
363 /* Will cancel the transaction in the next interrupt handler */
364 ctx->aborting = 1;
365 }
366
367 /* device_run() - prepares and starts the device
368 *
369 * This simulates all the immediate preparations required before starting
370 * a device. This will be called by the framework when it decides to schedule
371 * a particular instance.
372 */
373 static void device_run(void *priv)
374 {
375 struct vim2m_ctx *ctx = priv;
376 struct vim2m_dev *dev = ctx->dev;
377 struct vb2_v4l2_buffer *src_buf, *dst_buf;
378
379 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
380 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
381
382 device_process(ctx, src_buf, dst_buf);
383
384 /* Run a timer, which simulates a hardware irq */
385 schedule_irq(dev, ctx->transtime);
386 }
387
388 static void device_isr(unsigned long priv)
389 {
390 struct vim2m_dev *vim2m_dev = (struct vim2m_dev *)priv;
391 struct vim2m_ctx *curr_ctx;
392 struct vb2_v4l2_buffer *src_vb, *dst_vb;
393 unsigned long flags;
394
395 curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
396
397 if (NULL == curr_ctx) {
398 pr_err("Instance released before the end of transaction\n");
399 return;
400 }
401
402 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
403 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
404
405 curr_ctx->num_processed++;
406
407 spin_lock_irqsave(&vim2m_dev->irqlock, flags);
408 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
409 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
410 spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
411
412 if (curr_ctx->num_processed == curr_ctx->translen
413 || curr_ctx->aborting) {
414 dprintk(curr_ctx->dev, "Finishing transaction\n");
415 curr_ctx->num_processed = 0;
416 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
417 } else {
418 device_run(curr_ctx);
419 }
420 }
421
422 /*
423 * video ioctls
424 */
425 static int vidioc_querycap(struct file *file, void *priv,
426 struct v4l2_capability *cap)
427 {
428 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
429 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
430 snprintf(cap->bus_info, sizeof(cap->bus_info),
431 "platform:%s", MEM2MEM_NAME);
432 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
433 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
434 return 0;
435 }
436
437 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
438 {
439 int i, num;
440 struct vim2m_fmt *fmt;
441
442 num = 0;
443
444 for (i = 0; i < NUM_FORMATS; ++i) {
445 if (formats[i].types & type) {
446 /* index-th format of type type found ? */
447 if (num == f->index)
448 break;
449 /* Correct type but haven't reached our index yet,
450 * just increment per-type index */
451 ++num;
452 }
453 }
454
455 if (i < NUM_FORMATS) {
456 /* Format found */
457 fmt = &formats[i];
458 f->pixelformat = fmt->fourcc;
459 return 0;
460 }
461
462 /* Format not found */
463 return -EINVAL;
464 }
465
466 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
467 struct v4l2_fmtdesc *f)
468 {
469 return enum_fmt(f, MEM2MEM_CAPTURE);
470 }
471
472 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
473 struct v4l2_fmtdesc *f)
474 {
475 return enum_fmt(f, MEM2MEM_OUTPUT);
476 }
477
478 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
479 {
480 struct vb2_queue *vq;
481 struct vim2m_q_data *q_data;
482
483 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
484 if (!vq)
485 return -EINVAL;
486
487 q_data = get_q_data(ctx, f->type);
488
489 f->fmt.pix.width = q_data->width;
490 f->fmt.pix.height = q_data->height;
491 f->fmt.pix.field = V4L2_FIELD_NONE;
492 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
493 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
494 f->fmt.pix.sizeimage = q_data->sizeimage;
495 f->fmt.pix.colorspace = ctx->colorspace;
496
497 return 0;
498 }
499
500 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
501 struct v4l2_format *f)
502 {
503 return vidioc_g_fmt(file2ctx(file), f);
504 }
505
506 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
507 struct v4l2_format *f)
508 {
509 return vidioc_g_fmt(file2ctx(file), f);
510 }
511
512 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
513 {
514 /* V4L2 specification suggests the driver corrects the format struct
515 * if any of the dimensions is unsupported */
516 if (f->fmt.pix.height < MIN_H)
517 f->fmt.pix.height = MIN_H;
518 else if (f->fmt.pix.height > MAX_H)
519 f->fmt.pix.height = MAX_H;
520
521 if (f->fmt.pix.width < MIN_W)
522 f->fmt.pix.width = MIN_W;
523 else if (f->fmt.pix.width > MAX_W)
524 f->fmt.pix.width = MAX_W;
525
526 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
527 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
528 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
529 f->fmt.pix.field = V4L2_FIELD_NONE;
530
531 return 0;
532 }
533
534 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
535 struct v4l2_format *f)
536 {
537 struct vim2m_fmt *fmt;
538 struct vim2m_ctx *ctx = file2ctx(file);
539
540 fmt = find_format(f);
541 if (!fmt) {
542 f->fmt.pix.pixelformat = formats[0].fourcc;
543 fmt = find_format(f);
544 }
545 if (!(fmt->types & MEM2MEM_CAPTURE)) {
546 v4l2_err(&ctx->dev->v4l2_dev,
547 "Fourcc format (0x%08x) invalid.\n",
548 f->fmt.pix.pixelformat);
549 return -EINVAL;
550 }
551 f->fmt.pix.colorspace = ctx->colorspace;
552
553 return vidioc_try_fmt(f, fmt);
554 }
555
556 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
557 struct v4l2_format *f)
558 {
559 struct vim2m_fmt *fmt;
560 struct vim2m_ctx *ctx = file2ctx(file);
561
562 fmt = find_format(f);
563 if (!fmt) {
564 f->fmt.pix.pixelformat = formats[0].fourcc;
565 fmt = find_format(f);
566 }
567 if (!(fmt->types & MEM2MEM_OUTPUT)) {
568 v4l2_err(&ctx->dev->v4l2_dev,
569 "Fourcc format (0x%08x) invalid.\n",
570 f->fmt.pix.pixelformat);
571 return -EINVAL;
572 }
573 if (!f->fmt.pix.colorspace)
574 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
575
576 return vidioc_try_fmt(f, fmt);
577 }
578
579 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
580 {
581 struct vim2m_q_data *q_data;
582 struct vb2_queue *vq;
583
584 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
585 if (!vq)
586 return -EINVAL;
587
588 q_data = get_q_data(ctx, f->type);
589 if (!q_data)
590 return -EINVAL;
591
592 if (vb2_is_busy(vq)) {
593 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
594 return -EBUSY;
595 }
596
597 q_data->fmt = find_format(f);
598 q_data->width = f->fmt.pix.width;
599 q_data->height = f->fmt.pix.height;
600 q_data->sizeimage = q_data->width * q_data->height
601 * q_data->fmt->depth >> 3;
602
603 dprintk(ctx->dev,
604 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
605 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
606
607 return 0;
608 }
609
610 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
611 struct v4l2_format *f)
612 {
613 int ret;
614
615 ret = vidioc_try_fmt_vid_cap(file, priv, f);
616 if (ret)
617 return ret;
618
619 return vidioc_s_fmt(file2ctx(file), f);
620 }
621
622 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
623 struct v4l2_format *f)
624 {
625 struct vim2m_ctx *ctx = file2ctx(file);
626 int ret;
627
628 ret = vidioc_try_fmt_vid_out(file, priv, f);
629 if (ret)
630 return ret;
631
632 ret = vidioc_s_fmt(file2ctx(file), f);
633 if (!ret)
634 ctx->colorspace = f->fmt.pix.colorspace;
635 return ret;
636 }
637
638 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
639 {
640 struct vim2m_ctx *ctx =
641 container_of(ctrl->handler, struct vim2m_ctx, hdl);
642
643 switch (ctrl->id) {
644 case V4L2_CID_HFLIP:
645 if (ctrl->val)
646 ctx->mode |= MEM2MEM_HFLIP;
647 else
648 ctx->mode &= ~MEM2MEM_HFLIP;
649 break;
650
651 case V4L2_CID_VFLIP:
652 if (ctrl->val)
653 ctx->mode |= MEM2MEM_VFLIP;
654 else
655 ctx->mode &= ~MEM2MEM_VFLIP;
656 break;
657
658 case V4L2_CID_TRANS_TIME_MSEC:
659 ctx->transtime = ctrl->val;
660 break;
661
662 case V4L2_CID_TRANS_NUM_BUFS:
663 ctx->translen = ctrl->val;
664 break;
665
666 default:
667 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
668 return -EINVAL;
669 }
670
671 return 0;
672 }
673
674 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
675 .s_ctrl = vim2m_s_ctrl,
676 };
677
678
679 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
680 .vidioc_querycap = vidioc_querycap,
681
682 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
683 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
684 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
685 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
686
687 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
688 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
689 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
690 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
691
692 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
693 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
694 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
695 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
696 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
697 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
698 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
699
700 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
701 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
702
703 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
704 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
705 };
706
707
708 /*
709 * Queue operations
710 */
711
712 static int vim2m_queue_setup(struct vb2_queue *vq,
713 const void *parg,
714 unsigned int *nbuffers, unsigned int *nplanes,
715 unsigned int sizes[], void *alloc_ctxs[])
716 {
717 const struct v4l2_format *fmt = parg;
718 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
719 struct vim2m_q_data *q_data;
720 unsigned int size, count = *nbuffers;
721
722 q_data = get_q_data(ctx, vq->type);
723
724 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
725
726 if (fmt) {
727 if (fmt->fmt.pix.sizeimage < size)
728 return -EINVAL;
729 size = fmt->fmt.pix.sizeimage;
730 }
731
732 while (size * count > MEM2MEM_VID_MEM_LIMIT)
733 (count)--;
734
735 *nplanes = 1;
736 *nbuffers = count;
737 sizes[0] = size;
738
739 /*
740 * videobuf2-vmalloc allocator is context-less so no need to set
741 * alloc_ctxs array.
742 */
743
744 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
745
746 return 0;
747 }
748
749 static int vim2m_buf_prepare(struct vb2_buffer *vb)
750 {
751 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
752 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
753 struct vim2m_q_data *q_data;
754
755 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
756
757 q_data = get_q_data(ctx, vb->vb2_queue->type);
758 if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
759 if (vbuf->field == V4L2_FIELD_ANY)
760 vbuf->field = V4L2_FIELD_NONE;
761 if (vbuf->field != V4L2_FIELD_NONE) {
762 dprintk(ctx->dev, "%s field isn't supported\n",
763 __func__);
764 return -EINVAL;
765 }
766 }
767
768 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
769 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
770 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
771 return -EINVAL;
772 }
773
774 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
775
776 return 0;
777 }
778
779 static void vim2m_buf_queue(struct vb2_buffer *vb)
780 {
781 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
782 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
783
784 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
785 }
786
787 static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
788 {
789 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
790 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
791
792 q_data->sequence = 0;
793 return 0;
794 }
795
796 static void vim2m_stop_streaming(struct vb2_queue *q)
797 {
798 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
799 struct vb2_v4l2_buffer *vbuf;
800 unsigned long flags;
801
802 for (;;) {
803 if (V4L2_TYPE_IS_OUTPUT(q->type))
804 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
805 else
806 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
807 if (vbuf == NULL)
808 return;
809 spin_lock_irqsave(&ctx->dev->irqlock, flags);
810 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
811 spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
812 }
813 }
814
815 static struct vb2_ops vim2m_qops = {
816 .queue_setup = vim2m_queue_setup,
817 .buf_prepare = vim2m_buf_prepare,
818 .buf_queue = vim2m_buf_queue,
819 .start_streaming = vim2m_start_streaming,
820 .stop_streaming = vim2m_stop_streaming,
821 .wait_prepare = vb2_ops_wait_prepare,
822 .wait_finish = vb2_ops_wait_finish,
823 };
824
825 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
826 {
827 struct vim2m_ctx *ctx = priv;
828 int ret;
829
830 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
831 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
832 src_vq->drv_priv = ctx;
833 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
834 src_vq->ops = &vim2m_qops;
835 src_vq->mem_ops = &vb2_vmalloc_memops;
836 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
837 src_vq->lock = &ctx->dev->dev_mutex;
838
839 ret = vb2_queue_init(src_vq);
840 if (ret)
841 return ret;
842
843 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
844 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
845 dst_vq->drv_priv = ctx;
846 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
847 dst_vq->ops = &vim2m_qops;
848 dst_vq->mem_ops = &vb2_vmalloc_memops;
849 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
850 dst_vq->lock = &ctx->dev->dev_mutex;
851
852 return vb2_queue_init(dst_vq);
853 }
854
855 static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
856 .ops = &vim2m_ctrl_ops,
857 .id = V4L2_CID_TRANS_TIME_MSEC,
858 .name = "Transaction Time (msec)",
859 .type = V4L2_CTRL_TYPE_INTEGER,
860 .def = MEM2MEM_DEF_TRANSTIME,
861 .min = 1,
862 .max = 10001,
863 .step = 1,
864 };
865
866 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
867 .ops = &vim2m_ctrl_ops,
868 .id = V4L2_CID_TRANS_NUM_BUFS,
869 .name = "Buffers Per Transaction",
870 .type = V4L2_CTRL_TYPE_INTEGER,
871 .def = 1,
872 .min = 1,
873 .max = MEM2MEM_DEF_NUM_BUFS,
874 .step = 1,
875 };
876
877 /*
878 * File operations
879 */
880 static int vim2m_open(struct file *file)
881 {
882 struct vim2m_dev *dev = video_drvdata(file);
883 struct vim2m_ctx *ctx = NULL;
884 struct v4l2_ctrl_handler *hdl;
885 int rc = 0;
886
887 if (mutex_lock_interruptible(&dev->dev_mutex))
888 return -ERESTARTSYS;
889 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
890 if (!ctx) {
891 rc = -ENOMEM;
892 goto open_unlock;
893 }
894
895 v4l2_fh_init(&ctx->fh, video_devdata(file));
896 file->private_data = &ctx->fh;
897 ctx->dev = dev;
898 hdl = &ctx->hdl;
899 v4l2_ctrl_handler_init(hdl, 4);
900 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
901 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
902 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
903 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
904 if (hdl->error) {
905 rc = hdl->error;
906 v4l2_ctrl_handler_free(hdl);
907 goto open_unlock;
908 }
909 ctx->fh.ctrl_handler = hdl;
910 v4l2_ctrl_handler_setup(hdl);
911
912 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
913 ctx->q_data[V4L2_M2M_SRC].width = 640;
914 ctx->q_data[V4L2_M2M_SRC].height = 480;
915 ctx->q_data[V4L2_M2M_SRC].sizeimage =
916 ctx->q_data[V4L2_M2M_SRC].width *
917 ctx->q_data[V4L2_M2M_SRC].height *
918 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
919 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
920 ctx->colorspace = V4L2_COLORSPACE_REC709;
921
922 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
923
924 if (IS_ERR(ctx->fh.m2m_ctx)) {
925 rc = PTR_ERR(ctx->fh.m2m_ctx);
926
927 v4l2_ctrl_handler_free(hdl);
928 kfree(ctx);
929 goto open_unlock;
930 }
931
932 v4l2_fh_add(&ctx->fh);
933 atomic_inc(&dev->num_inst);
934
935 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
936 ctx, ctx->fh.m2m_ctx);
937
938 open_unlock:
939 mutex_unlock(&dev->dev_mutex);
940 return rc;
941 }
942
943 static int vim2m_release(struct file *file)
944 {
945 struct vim2m_dev *dev = video_drvdata(file);
946 struct vim2m_ctx *ctx = file2ctx(file);
947
948 dprintk(dev, "Releasing instance %p\n", ctx);
949
950 v4l2_fh_del(&ctx->fh);
951 v4l2_fh_exit(&ctx->fh);
952 v4l2_ctrl_handler_free(&ctx->hdl);
953 mutex_lock(&dev->dev_mutex);
954 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
955 mutex_unlock(&dev->dev_mutex);
956 kfree(ctx);
957
958 atomic_dec(&dev->num_inst);
959
960 return 0;
961 }
962
963 static const struct v4l2_file_operations vim2m_fops = {
964 .owner = THIS_MODULE,
965 .open = vim2m_open,
966 .release = vim2m_release,
967 .poll = v4l2_m2m_fop_poll,
968 .unlocked_ioctl = video_ioctl2,
969 .mmap = v4l2_m2m_fop_mmap,
970 };
971
972 static struct video_device vim2m_videodev = {
973 .name = MEM2MEM_NAME,
974 .vfl_dir = VFL_DIR_M2M,
975 .fops = &vim2m_fops,
976 .ioctl_ops = &vim2m_ioctl_ops,
977 .minor = -1,
978 .release = video_device_release_empty,
979 };
980
981 static struct v4l2_m2m_ops m2m_ops = {
982 .device_run = device_run,
983 .job_ready = job_ready,
984 .job_abort = job_abort,
985 };
986
987 static int vim2m_probe(struct platform_device *pdev)
988 {
989 struct vim2m_dev *dev;
990 struct video_device *vfd;
991 int ret;
992
993 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
994 if (!dev)
995 return -ENOMEM;
996
997 spin_lock_init(&dev->irqlock);
998
999 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1000 if (ret)
1001 return ret;
1002
1003 atomic_set(&dev->num_inst, 0);
1004 mutex_init(&dev->dev_mutex);
1005
1006 dev->vfd = vim2m_videodev;
1007 vfd = &dev->vfd;
1008 vfd->lock = &dev->dev_mutex;
1009 vfd->v4l2_dev = &dev->v4l2_dev;
1010
1011 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1012 if (ret) {
1013 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1014 goto unreg_dev;
1015 }
1016
1017 video_set_drvdata(vfd, dev);
1018 snprintf(vfd->name, sizeof(vfd->name), "%s", vim2m_videodev.name);
1019 v4l2_info(&dev->v4l2_dev,
1020 "Device registered as /dev/video%d\n", vfd->num);
1021
1022 setup_timer(&dev->timer, device_isr, (long)dev);
1023 platform_set_drvdata(pdev, dev);
1024
1025 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1026 if (IS_ERR(dev->m2m_dev)) {
1027 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1028 ret = PTR_ERR(dev->m2m_dev);
1029 goto err_m2m;
1030 }
1031
1032 return 0;
1033
1034 err_m2m:
1035 v4l2_m2m_release(dev->m2m_dev);
1036 video_unregister_device(&dev->vfd);
1037 unreg_dev:
1038 v4l2_device_unregister(&dev->v4l2_dev);
1039
1040 return ret;
1041 }
1042
1043 static int vim2m_remove(struct platform_device *pdev)
1044 {
1045 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1046
1047 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1048 v4l2_m2m_release(dev->m2m_dev);
1049 del_timer_sync(&dev->timer);
1050 video_unregister_device(&dev->vfd);
1051 v4l2_device_unregister(&dev->v4l2_dev);
1052
1053 return 0;
1054 }
1055
1056 static struct platform_driver vim2m_pdrv = {
1057 .probe = vim2m_probe,
1058 .remove = vim2m_remove,
1059 .driver = {
1060 .name = MEM2MEM_NAME,
1061 },
1062 };
1063
1064 static void __exit vim2m_exit(void)
1065 {
1066 platform_driver_unregister(&vim2m_pdrv);
1067 platform_device_unregister(&vim2m_pdev);
1068 }
1069
1070 static int __init vim2m_init(void)
1071 {
1072 int ret;
1073
1074 ret = platform_device_register(&vim2m_pdev);
1075 if (ret)
1076 return ret;
1077
1078 ret = platform_driver_register(&vim2m_pdrv);
1079 if (ret)
1080 platform_device_unregister(&vim2m_pdev);
1081
1082 return 0;
1083 }
1084
1085 module_init(vim2m_init);
1086 module_exit(vim2m_exit);
Linux with added FPC-III support