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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / media / platform / vim2m.c
blob462099a141e4aaae2da52bedad20d94b5197d554
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 #ifdef CONFIG_MEDIA_CONTROLLER
144 struct media_device mdev;
145 #endif
146
147 atomic_t num_inst;
148 struct mutex dev_mutex;
149 spinlock_t irqlock;
150
151 struct timer_list timer;
152
153 struct v4l2_m2m_dev *m2m_dev;
154 };
155
156 struct vim2m_ctx {
157 struct v4l2_fh fh;
158 struct vim2m_dev *dev;
159
160 struct v4l2_ctrl_handler hdl;
161
162 /* Processed buffers in this transaction */
163 u8 num_processed;
164
165 /* Transaction length (i.e. how many buffers per transaction) */
166 u32 translen;
167 /* Transaction time (i.e. simulated processing time) in milliseconds */
168 u32 transtime;
169
170 /* Abort requested by m2m */
171 int aborting;
172
173 /* Processing mode */
174 int mode;
175
176 enum v4l2_colorspace colorspace;
177 enum v4l2_ycbcr_encoding ycbcr_enc;
178 enum v4l2_xfer_func xfer_func;
179 enum v4l2_quantization quant;
180
181 /* Source and destination queue data */
182 struct vim2m_q_data q_data[2];
183 };
184
185 static inline struct vim2m_ctx *file2ctx(struct file *file)
186 {
187 return container_of(file->private_data, struct vim2m_ctx, fh);
188 }
189
190 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
191 enum v4l2_buf_type type)
192 {
193 switch (type) {
194 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
195 return &ctx->q_data[V4L2_M2M_SRC];
196 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
197 return &ctx->q_data[V4L2_M2M_DST];
198 default:
199 BUG();
200 }
201 return NULL;
202 }
203
204
205 static int device_process(struct vim2m_ctx *ctx,
206 struct vb2_v4l2_buffer *in_vb,
207 struct vb2_v4l2_buffer *out_vb)
208 {
209 struct vim2m_dev *dev = ctx->dev;
210 struct vim2m_q_data *q_data;
211 u8 *p_in, *p_out;
212 int x, y, t, w;
213 int tile_w, bytes_left;
214 int width, height, bytesperline;
215
216 q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
217
218 width = q_data->width;
219 height = q_data->height;
220 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
221
222 p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
223 p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
224 if (!p_in || !p_out) {
225 v4l2_err(&dev->v4l2_dev,
226 "Acquiring kernel pointers to buffers failed\n");
227 return -EFAULT;
228 }
229
230 if (vb2_plane_size(&in_vb->vb2_buf, 0) >
231 vb2_plane_size(&out_vb->vb2_buf, 0)) {
232 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
233 return -EINVAL;
234 }
235
236 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
237 / MEM2MEM_NUM_TILES;
238 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
239 w = 0;
240
241 out_vb->sequence =
242 get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
243 in_vb->sequence = q_data->sequence++;
244 out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;
245
246 if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
247 out_vb->timecode = in_vb->timecode;
248 out_vb->field = in_vb->field;
249 out_vb->flags = in_vb->flags &
250 (V4L2_BUF_FLAG_TIMECODE |
251 V4L2_BUF_FLAG_KEYFRAME |
252 V4L2_BUF_FLAG_PFRAME |
253 V4L2_BUF_FLAG_BFRAME |
254 V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
255
256 switch (ctx->mode) {
257 case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
258 p_out += bytesperline * height - bytes_left;
259 for (y = 0; y < height; ++y) {
260 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
261 if (w & 0x1) {
262 for (x = 0; x < tile_w; ++x)
263 *--p_out = *p_in++ +
264 MEM2MEM_COLOR_STEP;
265 } else {
266 for (x = 0; x < tile_w; ++x)
267 *--p_out = *p_in++ -
268 MEM2MEM_COLOR_STEP;
269 }
270 ++w;
271 }
272 p_in += bytes_left;
273 p_out -= bytes_left;
274 }
275 break;
276
277 case MEM2MEM_HFLIP:
278 for (y = 0; y < height; ++y) {
279 p_out += MEM2MEM_NUM_TILES * tile_w;
280 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
281 if (w & 0x01) {
282 for (x = 0; x < tile_w; ++x)
283 *--p_out = *p_in++ +
284 MEM2MEM_COLOR_STEP;
285 } else {
286 for (x = 0; x < tile_w; ++x)
287 *--p_out = *p_in++ -
288 MEM2MEM_COLOR_STEP;
289 }
290 ++w;
291 }
292 p_in += bytes_left;
293 p_out += bytesperline;
294 }
295 break;
296
297 case MEM2MEM_VFLIP:
298 p_out += bytesperline * (height - 1);
299 for (y = 0; y < height; ++y) {
300 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
301 if (w & 0x1) {
302 for (x = 0; x < tile_w; ++x)
303 *p_out++ = *p_in++ +
304 MEM2MEM_COLOR_STEP;
305 } else {
306 for (x = 0; x < tile_w; ++x)
307 *p_out++ = *p_in++ -
308 MEM2MEM_COLOR_STEP;
309 }
310 ++w;
311 }
312 p_in += bytes_left;
313 p_out += bytes_left - 2 * bytesperline;
314 }
315 break;
316
317 default:
318 for (y = 0; y < height; ++y) {
319 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
320 if (w & 0x1) {
321 for (x = 0; x < tile_w; ++x)
322 *p_out++ = *p_in++ +
323 MEM2MEM_COLOR_STEP;
324 } else {
325 for (x = 0; x < tile_w; ++x)
326 *p_out++ = *p_in++ -
327 MEM2MEM_COLOR_STEP;
328 }
329 ++w;
330 }
331 p_in += bytes_left;
332 p_out += bytes_left;
333 }
334 }
335
336 return 0;
337 }
338
339 static void schedule_irq(struct vim2m_dev *dev, int msec_timeout)
340 {
341 dprintk(dev, "Scheduling a simulated irq\n");
342 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
343 }
344
345 /*
346 * mem2mem callbacks
347 */
348
349 /*
350 * job_ready() - check whether an instance is ready to be scheduled to run
351 */
352 static int job_ready(void *priv)
353 {
354 struct vim2m_ctx *ctx = priv;
355
356 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
357 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
358 dprintk(ctx->dev, "Not enough buffers available\n");
359 return 0;
360 }
361
362 return 1;
363 }
364
365 static void job_abort(void *priv)
366 {
367 struct vim2m_ctx *ctx = priv;
368
369 /* Will cancel the transaction in the next interrupt handler */
370 ctx->aborting = 1;
371 }
372
373 /* device_run() - prepares and starts the device
374 *
375 * This simulates all the immediate preparations required before starting
376 * a device. This will be called by the framework when it decides to schedule
377 * a particular instance.
378 */
379 static void device_run(void *priv)
380 {
381 struct vim2m_ctx *ctx = priv;
382 struct vim2m_dev *dev = ctx->dev;
383 struct vb2_v4l2_buffer *src_buf, *dst_buf;
384
385 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
386 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
387
388 device_process(ctx, src_buf, dst_buf);
389
390 /* Run a timer, which simulates a hardware irq */
391 schedule_irq(dev, ctx->transtime);
392 }
393
394 static void device_isr(struct timer_list *t)
395 {
396 struct vim2m_dev *vim2m_dev = from_timer(vim2m_dev, t, timer);
397 struct vim2m_ctx *curr_ctx;
398 struct vb2_v4l2_buffer *src_vb, *dst_vb;
399 unsigned long flags;
400
401 curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
402
403 if (NULL == curr_ctx) {
404 pr_err("Instance released before the end of transaction\n");
405 return;
406 }
407
408 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
409 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
410
411 curr_ctx->num_processed++;
412
413 spin_lock_irqsave(&vim2m_dev->irqlock, flags);
414 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
415 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
416 spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
417
418 if (curr_ctx->num_processed == curr_ctx->translen
419 || curr_ctx->aborting) {
420 dprintk(curr_ctx->dev, "Finishing transaction\n");
421 curr_ctx->num_processed = 0;
422 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
423 } else {
424 device_run(curr_ctx);
425 }
426 }
427
428 /*
429 * video ioctls
430 */
431 static int vidioc_querycap(struct file *file, void *priv,
432 struct v4l2_capability *cap)
433 {
434 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
435 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
436 snprintf(cap->bus_info, sizeof(cap->bus_info),
437 "platform:%s", MEM2MEM_NAME);
438 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
439 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
440 return 0;
441 }
442
443 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
444 {
445 int i, num;
446 struct vim2m_fmt *fmt;
447
448 num = 0;
449
450 for (i = 0; i < NUM_FORMATS; ++i) {
451 if (formats[i].types & type) {
452 /* index-th format of type type found ? */
453 if (num == f->index)
454 break;
455 /* Correct type but haven't reached our index yet,
456 * just increment per-type index */
457 ++num;
458 }
459 }
460
461 if (i < NUM_FORMATS) {
462 /* Format found */
463 fmt = &formats[i];
464 f->pixelformat = fmt->fourcc;
465 return 0;
466 }
467
468 /* Format not found */
469 return -EINVAL;
470 }
471
472 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
473 struct v4l2_fmtdesc *f)
474 {
475 return enum_fmt(f, MEM2MEM_CAPTURE);
476 }
477
478 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
479 struct v4l2_fmtdesc *f)
480 {
481 return enum_fmt(f, MEM2MEM_OUTPUT);
482 }
483
484 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
485 {
486 struct vb2_queue *vq;
487 struct vim2m_q_data *q_data;
488
489 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
490 if (!vq)
491 return -EINVAL;
492
493 q_data = get_q_data(ctx, f->type);
494
495 f->fmt.pix.width = q_data->width;
496 f->fmt.pix.height = q_data->height;
497 f->fmt.pix.field = V4L2_FIELD_NONE;
498 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
499 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
500 f->fmt.pix.sizeimage = q_data->sizeimage;
501 f->fmt.pix.colorspace = ctx->colorspace;
502 f->fmt.pix.xfer_func = ctx->xfer_func;
503 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
504 f->fmt.pix.quantization = ctx->quant;
505
506 return 0;
507 }
508
509 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
510 struct v4l2_format *f)
511 {
512 return vidioc_g_fmt(file2ctx(file), f);
513 }
514
515 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
516 struct v4l2_format *f)
517 {
518 return vidioc_g_fmt(file2ctx(file), f);
519 }
520
521 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
522 {
523 /* V4L2 specification suggests the driver corrects the format struct
524 * if any of the dimensions is unsupported */
525 if (f->fmt.pix.height < MIN_H)
526 f->fmt.pix.height = MIN_H;
527 else if (f->fmt.pix.height > MAX_H)
528 f->fmt.pix.height = MAX_H;
529
530 if (f->fmt.pix.width < MIN_W)
531 f->fmt.pix.width = MIN_W;
532 else if (f->fmt.pix.width > MAX_W)
533 f->fmt.pix.width = MAX_W;
534
535 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
536 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
537 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
538 f->fmt.pix.field = V4L2_FIELD_NONE;
539
540 return 0;
541 }
542
543 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
544 struct v4l2_format *f)
545 {
546 struct vim2m_fmt *fmt;
547 struct vim2m_ctx *ctx = file2ctx(file);
548
549 fmt = find_format(f);
550 if (!fmt) {
551 f->fmt.pix.pixelformat = formats[0].fourcc;
552 fmt = find_format(f);
553 }
554 if (!(fmt->types & MEM2MEM_CAPTURE)) {
555 v4l2_err(&ctx->dev->v4l2_dev,
556 "Fourcc format (0x%08x) invalid.\n",
557 f->fmt.pix.pixelformat);
558 return -EINVAL;
559 }
560 f->fmt.pix.colorspace = ctx->colorspace;
561 f->fmt.pix.xfer_func = ctx->xfer_func;
562 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
563 f->fmt.pix.quantization = ctx->quant;
564
565 return vidioc_try_fmt(f, fmt);
566 }
567
568 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
569 struct v4l2_format *f)
570 {
571 struct vim2m_fmt *fmt;
572 struct vim2m_ctx *ctx = file2ctx(file);
573
574 fmt = find_format(f);
575 if (!fmt) {
576 f->fmt.pix.pixelformat = formats[0].fourcc;
577 fmt = find_format(f);
578 }
579 if (!(fmt->types & MEM2MEM_OUTPUT)) {
580 v4l2_err(&ctx->dev->v4l2_dev,
581 "Fourcc format (0x%08x) invalid.\n",
582 f->fmt.pix.pixelformat);
583 return -EINVAL;
584 }
585 if (!f->fmt.pix.colorspace)
586 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
587
588 return vidioc_try_fmt(f, fmt);
589 }
590
591 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
592 {
593 struct vim2m_q_data *q_data;
594 struct vb2_queue *vq;
595
596 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
597 if (!vq)
598 return -EINVAL;
599
600 q_data = get_q_data(ctx, f->type);
601 if (!q_data)
602 return -EINVAL;
603
604 if (vb2_is_busy(vq)) {
605 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
606 return -EBUSY;
607 }
608
609 q_data->fmt = find_format(f);
610 q_data->width = f->fmt.pix.width;
611 q_data->height = f->fmt.pix.height;
612 q_data->sizeimage = q_data->width * q_data->height
613 * q_data->fmt->depth >> 3;
614
615 dprintk(ctx->dev,
616 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
617 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
618
619 return 0;
620 }
621
622 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
623 struct v4l2_format *f)
624 {
625 int ret;
626
627 ret = vidioc_try_fmt_vid_cap(file, priv, f);
628 if (ret)
629 return ret;
630
631 return vidioc_s_fmt(file2ctx(file), f);
632 }
633
634 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
635 struct v4l2_format *f)
636 {
637 struct vim2m_ctx *ctx = file2ctx(file);
638 int ret;
639
640 ret = vidioc_try_fmt_vid_out(file, priv, f);
641 if (ret)
642 return ret;
643
644 ret = vidioc_s_fmt(file2ctx(file), f);
645 if (!ret) {
646 ctx->colorspace = f->fmt.pix.colorspace;
647 ctx->xfer_func = f->fmt.pix.xfer_func;
648 ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
649 ctx->quant = f->fmt.pix.quantization;
650 }
651 return ret;
652 }
653
654 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
655 {
656 struct vim2m_ctx *ctx =
657 container_of(ctrl->handler, struct vim2m_ctx, hdl);
658
659 switch (ctrl->id) {
660 case V4L2_CID_HFLIP:
661 if (ctrl->val)
662 ctx->mode |= MEM2MEM_HFLIP;
663 else
664 ctx->mode &= ~MEM2MEM_HFLIP;
665 break;
666
667 case V4L2_CID_VFLIP:
668 if (ctrl->val)
669 ctx->mode |= MEM2MEM_VFLIP;
670 else
671 ctx->mode &= ~MEM2MEM_VFLIP;
672 break;
673
674 case V4L2_CID_TRANS_TIME_MSEC:
675 ctx->transtime = ctrl->val;
676 break;
677
678 case V4L2_CID_TRANS_NUM_BUFS:
679 ctx->translen = ctrl->val;
680 break;
681
682 default:
683 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
684 return -EINVAL;
685 }
686
687 return 0;
688 }
689
690 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
691 .s_ctrl = vim2m_s_ctrl,
692 };
693
694
695 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
696 .vidioc_querycap = vidioc_querycap,
697
698 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
699 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
700 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
701 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
702
703 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
704 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
705 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
706 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
707
708 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
709 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
710 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
711 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
712 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
713 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
714 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
715
716 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
717 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
718
719 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
720 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
721 };
722
723
724 /*
725 * Queue operations
726 */
727
728 static int vim2m_queue_setup(struct vb2_queue *vq,
729 unsigned int *nbuffers, unsigned int *nplanes,
730 unsigned int sizes[], struct device *alloc_devs[])
731 {
732 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
733 struct vim2m_q_data *q_data;
734 unsigned int size, count = *nbuffers;
735
736 q_data = get_q_data(ctx, vq->type);
737
738 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
739
740 while (size * count > MEM2MEM_VID_MEM_LIMIT)
741 (count)--;
742 *nbuffers = count;
743
744 if (*nplanes)
745 return sizes[0] < size ? -EINVAL : 0;
746
747 *nplanes = 1;
748 sizes[0] = size;
749
750 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
751
752 return 0;
753 }
754
755 static int vim2m_buf_prepare(struct vb2_buffer *vb)
756 {
757 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
758 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
759 struct vim2m_q_data *q_data;
760
761 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
762
763 q_data = get_q_data(ctx, vb->vb2_queue->type);
764 if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
765 if (vbuf->field == V4L2_FIELD_ANY)
766 vbuf->field = V4L2_FIELD_NONE;
767 if (vbuf->field != V4L2_FIELD_NONE) {
768 dprintk(ctx->dev, "%s field isn't supported\n",
769 __func__);
770 return -EINVAL;
771 }
772 }
773
774 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
775 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
776 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
777 return -EINVAL;
778 }
779
780 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
781
782 return 0;
783 }
784
785 static void vim2m_buf_queue(struct vb2_buffer *vb)
786 {
787 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
788 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
789
790 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
791 }
792
793 static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
794 {
795 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
796 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
797
798 q_data->sequence = 0;
799 return 0;
800 }
801
802 static void vim2m_stop_streaming(struct vb2_queue *q)
803 {
804 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
805 struct vb2_v4l2_buffer *vbuf;
806 unsigned long flags;
807
808 for (;;) {
809 if (V4L2_TYPE_IS_OUTPUT(q->type))
810 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
811 else
812 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
813 if (vbuf == NULL)
814 return;
815 spin_lock_irqsave(&ctx->dev->irqlock, flags);
816 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
817 spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
818 }
819 }
820
821 static const struct vb2_ops vim2m_qops = {
822 .queue_setup = vim2m_queue_setup,
823 .buf_prepare = vim2m_buf_prepare,
824 .buf_queue = vim2m_buf_queue,
825 .start_streaming = vim2m_start_streaming,
826 .stop_streaming = vim2m_stop_streaming,
827 .wait_prepare = vb2_ops_wait_prepare,
828 .wait_finish = vb2_ops_wait_finish,
829 };
830
831 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
832 {
833 struct vim2m_ctx *ctx = priv;
834 int ret;
835
836 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
837 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
838 src_vq->drv_priv = ctx;
839 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
840 src_vq->ops = &vim2m_qops;
841 src_vq->mem_ops = &vb2_vmalloc_memops;
842 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
843 src_vq->lock = &ctx->dev->dev_mutex;
844
845 ret = vb2_queue_init(src_vq);
846 if (ret)
847 return ret;
848
849 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
850 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
851 dst_vq->drv_priv = ctx;
852 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
853 dst_vq->ops = &vim2m_qops;
854 dst_vq->mem_ops = &vb2_vmalloc_memops;
855 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
856 dst_vq->lock = &ctx->dev->dev_mutex;
857
858 return vb2_queue_init(dst_vq);
859 }
860
861 static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
862 .ops = &vim2m_ctrl_ops,
863 .id = V4L2_CID_TRANS_TIME_MSEC,
864 .name = "Transaction Time (msec)",
865 .type = V4L2_CTRL_TYPE_INTEGER,
866 .def = MEM2MEM_DEF_TRANSTIME,
867 .min = 1,
868 .max = 10001,
869 .step = 1,
870 };
871
872 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
873 .ops = &vim2m_ctrl_ops,
874 .id = V4L2_CID_TRANS_NUM_BUFS,
875 .name = "Buffers Per Transaction",
876 .type = V4L2_CTRL_TYPE_INTEGER,
877 .def = 1,
878 .min = 1,
879 .max = MEM2MEM_DEF_NUM_BUFS,
880 .step = 1,
881 };
882
883 /*
884 * File operations
885 */
886 static int vim2m_open(struct file *file)
887 {
888 struct vim2m_dev *dev = video_drvdata(file);
889 struct vim2m_ctx *ctx = NULL;
890 struct v4l2_ctrl_handler *hdl;
891 int rc = 0;
892
893 if (mutex_lock_interruptible(&dev->dev_mutex))
894 return -ERESTARTSYS;
895 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
896 if (!ctx) {
897 rc = -ENOMEM;
898 goto open_unlock;
899 }
900
901 v4l2_fh_init(&ctx->fh, video_devdata(file));
902 file->private_data = &ctx->fh;
903 ctx->dev = dev;
904 hdl = &ctx->hdl;
905 v4l2_ctrl_handler_init(hdl, 4);
906 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
907 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
908 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
909 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
910 if (hdl->error) {
911 rc = hdl->error;
912 v4l2_ctrl_handler_free(hdl);
913 kfree(ctx);
914 goto open_unlock;
915 }
916 ctx->fh.ctrl_handler = hdl;
917 v4l2_ctrl_handler_setup(hdl);
918
919 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
920 ctx->q_data[V4L2_M2M_SRC].width = 640;
921 ctx->q_data[V4L2_M2M_SRC].height = 480;
922 ctx->q_data[V4L2_M2M_SRC].sizeimage =
923 ctx->q_data[V4L2_M2M_SRC].width *
924 ctx->q_data[V4L2_M2M_SRC].height *
925 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
926 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
927 ctx->colorspace = V4L2_COLORSPACE_REC709;
928
929 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
930
931 if (IS_ERR(ctx->fh.m2m_ctx)) {
932 rc = PTR_ERR(ctx->fh.m2m_ctx);
933
934 v4l2_ctrl_handler_free(hdl);
935 v4l2_fh_exit(&ctx->fh);
936 kfree(ctx);
937 goto open_unlock;
938 }
939
940 v4l2_fh_add(&ctx->fh);
941 atomic_inc(&dev->num_inst);
942
943 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
944 ctx, ctx->fh.m2m_ctx);
945
946 open_unlock:
947 mutex_unlock(&dev->dev_mutex);
948 return rc;
949 }
950
951 static int vim2m_release(struct file *file)
952 {
953 struct vim2m_dev *dev = video_drvdata(file);
954 struct vim2m_ctx *ctx = file2ctx(file);
955
956 dprintk(dev, "Releasing instance %p\n", ctx);
957
958 v4l2_fh_del(&ctx->fh);
959 v4l2_fh_exit(&ctx->fh);
960 v4l2_ctrl_handler_free(&ctx->hdl);
961 mutex_lock(&dev->dev_mutex);
962 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
963 mutex_unlock(&dev->dev_mutex);
964 kfree(ctx);
965
966 atomic_dec(&dev->num_inst);
967
968 return 0;
969 }
970
971 static const struct v4l2_file_operations vim2m_fops = {
972 .owner = THIS_MODULE,
973 .open = vim2m_open,
974 .release = vim2m_release,
975 .poll = v4l2_m2m_fop_poll,
976 .unlocked_ioctl = video_ioctl2,
977 .mmap = v4l2_m2m_fop_mmap,
978 };
979
980 static const struct video_device vim2m_videodev = {
981 .name = MEM2MEM_NAME,
982 .vfl_dir = VFL_DIR_M2M,
983 .fops = &vim2m_fops,
984 .ioctl_ops = &vim2m_ioctl_ops,
985 .minor = -1,
986 .release = video_device_release_empty,
987 };
988
989 static const struct v4l2_m2m_ops m2m_ops = {
990 .device_run = device_run,
991 .job_ready = job_ready,
992 .job_abort = job_abort,
993 };
994
995 static int vim2m_probe(struct platform_device *pdev)
996 {
997 struct vim2m_dev *dev;
998 struct video_device *vfd;
999 int ret;
1000
1001 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1002 if (!dev)
1003 return -ENOMEM;
1004
1005 spin_lock_init(&dev->irqlock);
1006
1007 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1008 if (ret)
1009 return ret;
1010
1011 atomic_set(&dev->num_inst, 0);
1012 mutex_init(&dev->dev_mutex);
1013
1014 dev->vfd = vim2m_videodev;
1015 vfd = &dev->vfd;
1016 vfd->lock = &dev->dev_mutex;
1017 vfd->v4l2_dev = &dev->v4l2_dev;
1018
1019 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1020 if (ret) {
1021 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1022 goto unreg_v4l2;
1023 }
1024
1025 video_set_drvdata(vfd, dev);
1026 v4l2_info(&dev->v4l2_dev,
1027 "Device registered as /dev/video%d\n", vfd->num);
1028
1029 timer_setup(&dev->timer, device_isr, 0);
1030 platform_set_drvdata(pdev, dev);
1031
1032 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1033 if (IS_ERR(dev->m2m_dev)) {
1034 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1035 ret = PTR_ERR(dev->m2m_dev);
1036 goto unreg_dev;
1037 }
1038
1039 #ifdef CONFIG_MEDIA_CONTROLLER
1040 dev->mdev.dev = &pdev->dev;
1041 strlcpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
1042 media_device_init(&dev->mdev);
1043 dev->v4l2_dev.mdev = &dev->mdev;
1044
1045 ret = v4l2_m2m_register_media_controller(dev->m2m_dev,
1046 vfd, MEDIA_ENT_F_PROC_VIDEO_SCALER);
1047 if (ret) {
1048 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
1049 goto unreg_m2m;
1050 }
1051
1052 ret = media_device_register(&dev->mdev);
1053 if (ret) {
1054 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
1055 goto unreg_m2m_mc;
1056 }
1057 #endif
1058 return 0;
1059
1060 #ifdef CONFIG_MEDIA_CONTROLLER
1061 unreg_m2m_mc:
1062 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1063 unreg_m2m:
1064 v4l2_m2m_release(dev->m2m_dev);
1065 #endif
1066 unreg_dev:
1067 video_unregister_device(&dev->vfd);
1068 unreg_v4l2:
1069 v4l2_device_unregister(&dev->v4l2_dev);
1070
1071 return ret;
1072 }
1073
1074 static int vim2m_remove(struct platform_device *pdev)
1075 {
1076 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1077
1078 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1079
1080 #ifdef CONFIG_MEDIA_CONTROLLER
1081 media_device_unregister(&dev->mdev);
1082 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1083 media_device_cleanup(&dev->mdev);
1084 #endif
1085 v4l2_m2m_release(dev->m2m_dev);
1086 del_timer_sync(&dev->timer);
1087 video_unregister_device(&dev->vfd);
1088 v4l2_device_unregister(&dev->v4l2_dev);
1089
1090 return 0;
1091 }
1092
1093 static struct platform_driver vim2m_pdrv = {
1094 .probe = vim2m_probe,
1095 .remove = vim2m_remove,
1096 .driver = {
1097 .name = MEM2MEM_NAME,
1098 },
1099 };
1100
1101 static void __exit vim2m_exit(void)
1102 {
1103 platform_driver_unregister(&vim2m_pdrv);
1104 platform_device_unregister(&vim2m_pdev);
1105 }
1106
1107 static int __init vim2m_init(void)
1108 {
1109 int ret;
1110
1111 ret = platform_device_register(&vim2m_pdev);
1112 if (ret)
1113 return ret;
1114
1115 ret = platform_driver_register(&vim2m_pdrv);
1116 if (ret)
1117 platform_device_unregister(&vim2m_pdev);
1118
1119 return ret;
1120 }
1121
1122 module_init(vim2m_init);
1123 module_exit(vim2m_exit);
Linux with added FPC-III support