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96d8eab5 PO |
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, <p.osciak@samsung.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/version.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/sched.h> | |
6b46c397 | 25 | #include <linux/slab.h> |
96d8eab5 PO |
26 | |
27 | #include <linux/platform_device.h> | |
28 | #include <media/v4l2-mem2mem.h> | |
29 | #include <media/v4l2-device.h> | |
30 | #include <media/v4l2-ioctl.h> | |
31 | #include <media/videobuf-vmalloc.h> | |
32 | ||
33 | #define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev" | |
34 | ||
35 | MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); | |
36 | MODULE_AUTHOR("Pawel Osciak, <p.osciak@samsung.com>"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | ||
39 | ||
40 | #define MIN_W 32 | |
41 | #define MIN_H 32 | |
42 | #define MAX_W 640 | |
43 | #define MAX_H 480 | |
44 | #define DIM_ALIGN_MASK 0x08 /* 8-alignment for dimensions */ | |
45 | ||
46 | /* Flags that indicate a format can be used for capture/output */ | |
47 | #define MEM2MEM_CAPTURE (1 << 0) | |
48 | #define MEM2MEM_OUTPUT (1 << 1) | |
49 | ||
50 | #define MEM2MEM_NAME "m2m-testdev" | |
51 | ||
52 | /* Per queue */ | |
53 | #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME | |
54 | /* In bytes, per queue */ | |
55 | #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024) | |
56 | ||
57 | /* Default transaction time in msec */ | |
58 | #define MEM2MEM_DEF_TRANSTIME 1000 | |
59 | /* Default number of buffers per transaction */ | |
60 | #define MEM2MEM_DEF_TRANSLEN 1 | |
61 | #define MEM2MEM_COLOR_STEP (0xff >> 4) | |
62 | #define MEM2MEM_NUM_TILES 8 | |
63 | ||
64 | #define dprintk(dev, fmt, arg...) \ | |
65 | v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) | |
66 | ||
67 | ||
68 | void m2mtest_dev_release(struct device *dev) | |
69 | {} | |
70 | ||
71 | static struct platform_device m2mtest_pdev = { | |
72 | .name = MEM2MEM_NAME, | |
73 | .dev.release = m2mtest_dev_release, | |
74 | }; | |
75 | ||
76 | struct m2mtest_fmt { | |
77 | char *name; | |
78 | u32 fourcc; | |
79 | int depth; | |
80 | /* Types the format can be used for */ | |
81 | u32 types; | |
82 | }; | |
83 | ||
84 | static struct m2mtest_fmt formats[] = { | |
85 | { | |
86 | .name = "RGB565 (BE)", | |
87 | .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ | |
88 | .depth = 16, | |
89 | /* Both capture and output format */ | |
90 | .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, | |
91 | }, | |
92 | { | |
93 | .name = "4:2:2, packed, YUYV", | |
94 | .fourcc = V4L2_PIX_FMT_YUYV, | |
95 | .depth = 16, | |
96 | /* Output-only format */ | |
97 | .types = MEM2MEM_OUTPUT, | |
98 | }, | |
99 | }; | |
100 | ||
101 | /* Per-queue, driver-specific private data */ | |
102 | struct m2mtest_q_data { | |
103 | unsigned int width; | |
104 | unsigned int height; | |
105 | unsigned int sizeimage; | |
106 | struct m2mtest_fmt *fmt; | |
107 | }; | |
108 | ||
109 | enum { | |
110 | V4L2_M2M_SRC = 0, | |
111 | V4L2_M2M_DST = 1, | |
112 | }; | |
113 | ||
114 | /* Source and destination queue data */ | |
115 | static struct m2mtest_q_data q_data[2]; | |
116 | ||
117 | static struct m2mtest_q_data *get_q_data(enum v4l2_buf_type type) | |
118 | { | |
119 | switch (type) { | |
120 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
121 | return &q_data[V4L2_M2M_SRC]; | |
122 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
123 | return &q_data[V4L2_M2M_DST]; | |
124 | default: | |
125 | BUG(); | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | #define V4L2_CID_TRANS_TIME_MSEC V4L2_CID_PRIVATE_BASE | |
131 | #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_PRIVATE_BASE + 1) | |
132 | ||
133 | static struct v4l2_queryctrl m2mtest_ctrls[] = { | |
134 | { | |
135 | .id = V4L2_CID_TRANS_TIME_MSEC, | |
136 | .type = V4L2_CTRL_TYPE_INTEGER, | |
137 | .name = "Transaction time (msec)", | |
138 | .minimum = 1, | |
139 | .maximum = 10000, | |
140 | .step = 100, | |
141 | .default_value = 1000, | |
142 | .flags = 0, | |
143 | }, { | |
144 | .id = V4L2_CID_TRANS_NUM_BUFS, | |
145 | .type = V4L2_CTRL_TYPE_INTEGER, | |
146 | .name = "Buffers per transaction", | |
147 | .minimum = 1, | |
148 | .maximum = MEM2MEM_DEF_NUM_BUFS, | |
149 | .step = 1, | |
150 | .default_value = 1, | |
151 | .flags = 0, | |
152 | }, | |
153 | }; | |
154 | ||
155 | #define NUM_FORMATS ARRAY_SIZE(formats) | |
156 | ||
157 | static struct m2mtest_fmt *find_format(struct v4l2_format *f) | |
158 | { | |
159 | struct m2mtest_fmt *fmt; | |
160 | unsigned int k; | |
161 | ||
162 | for (k = 0; k < NUM_FORMATS; k++) { | |
163 | fmt = &formats[k]; | |
164 | if (fmt->fourcc == f->fmt.pix.pixelformat) | |
165 | break; | |
166 | } | |
167 | ||
168 | if (k == NUM_FORMATS) | |
169 | return NULL; | |
170 | ||
171 | return &formats[k]; | |
172 | } | |
173 | ||
174 | struct m2mtest_dev { | |
175 | struct v4l2_device v4l2_dev; | |
176 | struct video_device *vfd; | |
177 | ||
178 | atomic_t num_inst; | |
179 | struct mutex dev_mutex; | |
180 | spinlock_t irqlock; | |
181 | ||
182 | struct timer_list timer; | |
183 | ||
184 | struct v4l2_m2m_dev *m2m_dev; | |
185 | }; | |
186 | ||
187 | struct m2mtest_ctx { | |
188 | struct m2mtest_dev *dev; | |
189 | ||
190 | /* Processed buffers in this transaction */ | |
191 | u8 num_processed; | |
192 | ||
193 | /* Transaction length (i.e. how many buffers per transaction) */ | |
194 | u32 translen; | |
195 | /* Transaction time (i.e. simulated processing time) in milliseconds */ | |
196 | u32 transtime; | |
197 | ||
198 | /* Abort requested by m2m */ | |
199 | int aborting; | |
200 | ||
201 | struct v4l2_m2m_ctx *m2m_ctx; | |
202 | }; | |
203 | ||
204 | struct m2mtest_buffer { | |
205 | /* vb must be first! */ | |
206 | struct videobuf_buffer vb; | |
207 | }; | |
208 | ||
209 | static struct v4l2_queryctrl *get_ctrl(int id) | |
210 | { | |
211 | int i; | |
212 | ||
213 | for (i = 0; i < ARRAY_SIZE(m2mtest_ctrls); ++i) { | |
214 | if (id == m2mtest_ctrls[i].id) | |
215 | return &m2mtest_ctrls[i]; | |
216 | } | |
217 | ||
218 | return NULL; | |
219 | } | |
220 | ||
221 | static int device_process(struct m2mtest_ctx *ctx, | |
222 | struct m2mtest_buffer *in_buf, | |
223 | struct m2mtest_buffer *out_buf) | |
224 | { | |
225 | struct m2mtest_dev *dev = ctx->dev; | |
226 | u8 *p_in, *p_out; | |
227 | int x, y, t, w; | |
228 | int tile_w, bytes_left; | |
229 | struct videobuf_queue *src_q; | |
230 | struct videobuf_queue *dst_q; | |
231 | ||
232 | src_q = v4l2_m2m_get_src_vq(ctx->m2m_ctx); | |
233 | dst_q = v4l2_m2m_get_dst_vq(ctx->m2m_ctx); | |
234 | p_in = videobuf_queue_to_vaddr(src_q, &in_buf->vb); | |
235 | p_out = videobuf_queue_to_vaddr(dst_q, &out_buf->vb); | |
236 | if (!p_in || !p_out) { | |
237 | v4l2_err(&dev->v4l2_dev, | |
238 | "Acquiring kernel pointers to buffers failed\n"); | |
239 | return -EFAULT; | |
240 | } | |
241 | ||
b17a200f | 242 | if (in_buf->vb.size > out_buf->vb.size) { |
96d8eab5 PO |
243 | v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n"); |
244 | return -EINVAL; | |
245 | } | |
246 | ||
247 | tile_w = (in_buf->vb.width * (q_data[V4L2_M2M_DST].fmt->depth >> 3)) | |
248 | / MEM2MEM_NUM_TILES; | |
249 | bytes_left = in_buf->vb.bytesperline - tile_w * MEM2MEM_NUM_TILES; | |
250 | w = 0; | |
251 | ||
252 | for (y = 0; y < in_buf->vb.height; ++y) { | |
253 | for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { | |
254 | if (w & 0x1) { | |
255 | for (x = 0; x < tile_w; ++x) | |
256 | *p_out++ = *p_in++ + MEM2MEM_COLOR_STEP; | |
257 | } else { | |
258 | for (x = 0; x < tile_w; ++x) | |
259 | *p_out++ = *p_in++ - MEM2MEM_COLOR_STEP; | |
260 | } | |
261 | ++w; | |
262 | } | |
263 | p_in += bytes_left; | |
264 | p_out += bytes_left; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static void schedule_irq(struct m2mtest_dev *dev, int msec_timeout) | |
271 | { | |
272 | dprintk(dev, "Scheduling a simulated irq\n"); | |
273 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout)); | |
274 | } | |
275 | ||
276 | /* | |
277 | * mem2mem callbacks | |
278 | */ | |
279 | ||
280 | /** | |
281 | * job_ready() - check whether an instance is ready to be scheduled to run | |
282 | */ | |
283 | static int job_ready(void *priv) | |
284 | { | |
285 | struct m2mtest_ctx *ctx = priv; | |
286 | ||
287 | if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < ctx->translen | |
288 | || v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) < ctx->translen) { | |
289 | dprintk(ctx->dev, "Not enough buffers available\n"); | |
290 | return 0; | |
291 | } | |
292 | ||
293 | return 1; | |
294 | } | |
295 | ||
296 | static void job_abort(void *priv) | |
297 | { | |
298 | struct m2mtest_ctx *ctx = priv; | |
299 | ||
300 | /* Will cancel the transaction in the next interrupt handler */ | |
301 | ctx->aborting = 1; | |
302 | } | |
303 | ||
304 | /* device_run() - prepares and starts the device | |
305 | * | |
306 | * This simulates all the immediate preparations required before starting | |
307 | * a device. This will be called by the framework when it decides to schedule | |
308 | * a particular instance. | |
309 | */ | |
310 | static void device_run(void *priv) | |
311 | { | |
312 | struct m2mtest_ctx *ctx = priv; | |
313 | struct m2mtest_dev *dev = ctx->dev; | |
314 | struct m2mtest_buffer *src_buf, *dst_buf; | |
315 | ||
316 | src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); | |
317 | dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); | |
318 | ||
319 | device_process(ctx, src_buf, dst_buf); | |
320 | ||
321 | /* Run a timer, which simulates a hardware irq */ | |
322 | schedule_irq(dev, ctx->transtime); | |
323 | } | |
324 | ||
325 | ||
326 | static void device_isr(unsigned long priv) | |
327 | { | |
328 | struct m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv; | |
329 | struct m2mtest_ctx *curr_ctx; | |
330 | struct m2mtest_buffer *src_buf, *dst_buf; | |
331 | unsigned long flags; | |
332 | ||
333 | curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev); | |
334 | ||
335 | if (NULL == curr_ctx) { | |
336 | printk(KERN_ERR | |
337 | "Instance released before the end of transaction\n"); | |
338 | return; | |
339 | } | |
340 | ||
341 | src_buf = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); | |
342 | dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); | |
343 | curr_ctx->num_processed++; | |
344 | ||
345 | if (curr_ctx->num_processed == curr_ctx->translen | |
346 | || curr_ctx->aborting) { | |
347 | dprintk(curr_ctx->dev, "Finishing transaction\n"); | |
348 | curr_ctx->num_processed = 0; | |
349 | spin_lock_irqsave(&m2mtest_dev->irqlock, flags); | |
350 | src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE; | |
351 | wake_up(&src_buf->vb.done); | |
352 | wake_up(&dst_buf->vb.done); | |
353 | spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); | |
354 | v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx); | |
355 | } else { | |
356 | spin_lock_irqsave(&m2mtest_dev->irqlock, flags); | |
357 | src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE; | |
358 | wake_up(&src_buf->vb.done); | |
359 | wake_up(&dst_buf->vb.done); | |
360 | spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); | |
361 | device_run(curr_ctx); | |
362 | } | |
363 | } | |
364 | ||
365 | ||
366 | /* | |
367 | * video ioctls | |
368 | */ | |
369 | static int vidioc_querycap(struct file *file, void *priv, | |
370 | struct v4l2_capability *cap) | |
371 | { | |
372 | strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1); | |
373 | strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1); | |
374 | cap->bus_info[0] = 0; | |
375 | cap->version = KERNEL_VERSION(0, 1, 0); | |
376 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | |
377 | | V4L2_CAP_STREAMING; | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) | |
383 | { | |
384 | int i, num; | |
385 | struct m2mtest_fmt *fmt; | |
386 | ||
387 | num = 0; | |
388 | ||
389 | for (i = 0; i < NUM_FORMATS; ++i) { | |
390 | if (formats[i].types & type) { | |
391 | /* index-th format of type type found ? */ | |
392 | if (num == f->index) | |
393 | break; | |
394 | /* Correct type but haven't reached our index yet, | |
395 | * just increment per-type index */ | |
396 | ++num; | |
397 | } | |
398 | } | |
399 | ||
400 | if (i < NUM_FORMATS) { | |
401 | /* Format found */ | |
402 | fmt = &formats[i]; | |
403 | strncpy(f->description, fmt->name, sizeof(f->description) - 1); | |
404 | f->pixelformat = fmt->fourcc; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | /* Format not found */ | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, | |
413 | struct v4l2_fmtdesc *f) | |
414 | { | |
415 | return enum_fmt(f, MEM2MEM_CAPTURE); | |
416 | } | |
417 | ||
418 | static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, | |
419 | struct v4l2_fmtdesc *f) | |
420 | { | |
421 | return enum_fmt(f, MEM2MEM_OUTPUT); | |
422 | } | |
423 | ||
424 | static int vidioc_g_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) | |
425 | { | |
426 | struct videobuf_queue *vq; | |
427 | struct m2mtest_q_data *q_data; | |
428 | ||
429 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
430 | if (!vq) | |
431 | return -EINVAL; | |
432 | ||
433 | q_data = get_q_data(f->type); | |
434 | ||
435 | f->fmt.pix.width = q_data->width; | |
436 | f->fmt.pix.height = q_data->height; | |
437 | f->fmt.pix.field = vq->field; | |
438 | f->fmt.pix.pixelformat = q_data->fmt->fourcc; | |
439 | f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3; | |
440 | f->fmt.pix.sizeimage = q_data->sizeimage; | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | static int vidioc_g_fmt_vid_out(struct file *file, void *priv, | |
446 | struct v4l2_format *f) | |
447 | { | |
448 | return vidioc_g_fmt(priv, f); | |
449 | } | |
450 | ||
451 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, | |
452 | struct v4l2_format *f) | |
453 | { | |
454 | return vidioc_g_fmt(priv, f); | |
455 | } | |
456 | ||
457 | static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt) | |
458 | { | |
459 | enum v4l2_field field; | |
460 | ||
461 | field = f->fmt.pix.field; | |
462 | ||
463 | if (field == V4L2_FIELD_ANY) | |
464 | field = V4L2_FIELD_NONE; | |
465 | else if (V4L2_FIELD_NONE != field) | |
466 | return -EINVAL; | |
467 | ||
468 | /* V4L2 specification suggests the driver corrects the format struct | |
469 | * if any of the dimensions is unsupported */ | |
470 | f->fmt.pix.field = field; | |
471 | ||
472 | if (f->fmt.pix.height < MIN_H) | |
473 | f->fmt.pix.height = MIN_H; | |
474 | else if (f->fmt.pix.height > MAX_H) | |
475 | f->fmt.pix.height = MAX_H; | |
476 | ||
477 | if (f->fmt.pix.width < MIN_W) | |
478 | f->fmt.pix.width = MIN_W; | |
479 | else if (f->fmt.pix.width > MAX_W) | |
480 | f->fmt.pix.width = MAX_W; | |
481 | ||
482 | f->fmt.pix.width &= ~DIM_ALIGN_MASK; | |
483 | f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; | |
484 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, | |
490 | struct v4l2_format *f) | |
491 | { | |
492 | struct m2mtest_fmt *fmt; | |
493 | struct m2mtest_ctx *ctx = priv; | |
494 | ||
495 | fmt = find_format(f); | |
496 | if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { | |
497 | v4l2_err(&ctx->dev->v4l2_dev, | |
498 | "Fourcc format (0x%08x) invalid.\n", | |
499 | f->fmt.pix.pixelformat); | |
500 | return -EINVAL; | |
501 | } | |
502 | ||
503 | return vidioc_try_fmt(f, fmt); | |
504 | } | |
505 | ||
506 | static int vidioc_try_fmt_vid_out(struct file *file, void *priv, | |
507 | struct v4l2_format *f) | |
508 | { | |
509 | struct m2mtest_fmt *fmt; | |
510 | struct m2mtest_ctx *ctx = priv; | |
511 | ||
512 | fmt = find_format(f); | |
513 | if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { | |
514 | v4l2_err(&ctx->dev->v4l2_dev, | |
515 | "Fourcc format (0x%08x) invalid.\n", | |
516 | f->fmt.pix.pixelformat); | |
517 | return -EINVAL; | |
518 | } | |
519 | ||
520 | return vidioc_try_fmt(f, fmt); | |
521 | } | |
522 | ||
523 | static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) | |
524 | { | |
525 | struct m2mtest_q_data *q_data; | |
526 | struct videobuf_queue *vq; | |
96d8eab5 PO |
527 | |
528 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
529 | if (!vq) | |
530 | return -EINVAL; | |
531 | ||
532 | q_data = get_q_data(f->type); | |
533 | if (!q_data) | |
534 | return -EINVAL; | |
535 | ||
96d8eab5 PO |
536 | if (videobuf_queue_is_busy(vq)) { |
537 | v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); | |
07e80305 | 538 | return -EBUSY; |
96d8eab5 PO |
539 | } |
540 | ||
541 | q_data->fmt = find_format(f); | |
542 | q_data->width = f->fmt.pix.width; | |
543 | q_data->height = f->fmt.pix.height; | |
544 | q_data->sizeimage = q_data->width * q_data->height | |
545 | * q_data->fmt->depth >> 3; | |
546 | vq->field = f->fmt.pix.field; | |
547 | ||
548 | dprintk(ctx->dev, | |
549 | "Setting format for type %d, wxh: %dx%d, fmt: %d\n", | |
550 | f->type, q_data->width, q_data->height, q_data->fmt->fourcc); | |
551 | ||
07e80305 | 552 | return 0; |
96d8eab5 PO |
553 | } |
554 | ||
555 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, | |
556 | struct v4l2_format *f) | |
557 | { | |
558 | int ret; | |
559 | ||
560 | ret = vidioc_try_fmt_vid_cap(file, priv, f); | |
561 | if (ret) | |
562 | return ret; | |
563 | ||
564 | return vidioc_s_fmt(priv, f); | |
565 | } | |
566 | ||
567 | static int vidioc_s_fmt_vid_out(struct file *file, void *priv, | |
568 | struct v4l2_format *f) | |
569 | { | |
570 | int ret; | |
571 | ||
572 | ret = vidioc_try_fmt_vid_out(file, priv, f); | |
573 | if (ret) | |
574 | return ret; | |
575 | ||
576 | return vidioc_s_fmt(priv, f); | |
577 | } | |
578 | ||
579 | static int vidioc_reqbufs(struct file *file, void *priv, | |
580 | struct v4l2_requestbuffers *reqbufs) | |
581 | { | |
582 | struct m2mtest_ctx *ctx = priv; | |
583 | ||
584 | return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); | |
585 | } | |
586 | ||
587 | static int vidioc_querybuf(struct file *file, void *priv, | |
588 | struct v4l2_buffer *buf) | |
589 | { | |
590 | struct m2mtest_ctx *ctx = priv; | |
591 | ||
592 | return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); | |
593 | } | |
594 | ||
595 | static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
596 | { | |
597 | struct m2mtest_ctx *ctx = priv; | |
598 | ||
599 | return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); | |
600 | } | |
601 | ||
602 | static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
603 | { | |
604 | struct m2mtest_ctx *ctx = priv; | |
605 | ||
606 | return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); | |
607 | } | |
608 | ||
609 | static int vidioc_streamon(struct file *file, void *priv, | |
610 | enum v4l2_buf_type type) | |
611 | { | |
612 | struct m2mtest_ctx *ctx = priv; | |
613 | ||
614 | return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); | |
615 | } | |
616 | ||
617 | static int vidioc_streamoff(struct file *file, void *priv, | |
618 | enum v4l2_buf_type type) | |
619 | { | |
620 | struct m2mtest_ctx *ctx = priv; | |
621 | ||
622 | return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); | |
623 | } | |
624 | ||
625 | static int vidioc_queryctrl(struct file *file, void *priv, | |
626 | struct v4l2_queryctrl *qc) | |
627 | { | |
628 | struct v4l2_queryctrl *c; | |
629 | ||
630 | c = get_ctrl(qc->id); | |
631 | if (!c) | |
632 | return -EINVAL; | |
633 | ||
634 | *qc = *c; | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
639 | struct v4l2_control *ctrl) | |
640 | { | |
641 | struct m2mtest_ctx *ctx = priv; | |
642 | ||
643 | switch (ctrl->id) { | |
644 | case V4L2_CID_TRANS_TIME_MSEC: | |
645 | ctrl->value = ctx->transtime; | |
646 | break; | |
647 | ||
648 | case V4L2_CID_TRANS_NUM_BUFS: | |
649 | ctrl->value = ctx->translen; | |
650 | break; | |
651 | ||
652 | default: | |
653 | v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); | |
654 | return -EINVAL; | |
655 | } | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | static int check_ctrl_val(struct m2mtest_ctx *ctx, struct v4l2_control *ctrl) | |
661 | { | |
662 | struct v4l2_queryctrl *c; | |
663 | ||
664 | c = get_ctrl(ctrl->id); | |
665 | if (!c) | |
666 | return -EINVAL; | |
667 | ||
668 | if (ctrl->value < c->minimum || ctrl->value > c->maximum) { | |
669 | v4l2_err(&ctx->dev->v4l2_dev, "Value out of range\n"); | |
670 | return -ERANGE; | |
671 | } | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
677 | struct v4l2_control *ctrl) | |
678 | { | |
679 | struct m2mtest_ctx *ctx = priv; | |
680 | int ret = 0; | |
681 | ||
682 | ret = check_ctrl_val(ctx, ctrl); | |
683 | if (ret != 0) | |
684 | return ret; | |
685 | ||
686 | switch (ctrl->id) { | |
687 | case V4L2_CID_TRANS_TIME_MSEC: | |
688 | ctx->transtime = ctrl->value; | |
689 | break; | |
690 | ||
691 | case V4L2_CID_TRANS_NUM_BUFS: | |
692 | ctx->translen = ctrl->value; | |
693 | break; | |
694 | ||
695 | default: | |
696 | v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | ||
704 | static const struct v4l2_ioctl_ops m2mtest_ioctl_ops = { | |
705 | .vidioc_querycap = vidioc_querycap, | |
706 | ||
707 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
708 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
709 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
710 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
711 | ||
712 | .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, | |
713 | .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, | |
714 | .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, | |
715 | .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, | |
716 | ||
717 | .vidioc_reqbufs = vidioc_reqbufs, | |
718 | .vidioc_querybuf = vidioc_querybuf, | |
719 | ||
720 | .vidioc_qbuf = vidioc_qbuf, | |
721 | .vidioc_dqbuf = vidioc_dqbuf, | |
722 | ||
723 | .vidioc_streamon = vidioc_streamon, | |
724 | .vidioc_streamoff = vidioc_streamoff, | |
725 | ||
726 | .vidioc_queryctrl = vidioc_queryctrl, | |
727 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
728 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
729 | }; | |
730 | ||
731 | ||
732 | /* | |
733 | * Queue operations | |
734 | */ | |
735 | ||
736 | static void m2mtest_buf_release(struct videobuf_queue *vq, | |
737 | struct videobuf_buffer *vb) | |
738 | { | |
739 | struct m2mtest_ctx *ctx = vq->priv_data; | |
740 | ||
741 | dprintk(ctx->dev, "type: %d, index: %d, state: %d\n", | |
742 | vq->type, vb->i, vb->state); | |
743 | ||
744 | videobuf_vmalloc_free(vb); | |
745 | vb->state = VIDEOBUF_NEEDS_INIT; | |
746 | } | |
747 | ||
748 | static int m2mtest_buf_setup(struct videobuf_queue *vq, unsigned int *count, | |
749 | unsigned int *size) | |
750 | { | |
751 | struct m2mtest_ctx *ctx = vq->priv_data; | |
752 | struct m2mtest_q_data *q_data; | |
753 | ||
754 | q_data = get_q_data(vq->type); | |
755 | ||
756 | *size = q_data->width * q_data->height * q_data->fmt->depth >> 3; | |
757 | dprintk(ctx->dev, "size:%d, w/h %d/%d, depth: %d\n", | |
758 | *size, q_data->width, q_data->height, q_data->fmt->depth); | |
759 | ||
760 | if (0 == *count) | |
761 | *count = MEM2MEM_DEF_NUM_BUFS; | |
762 | ||
763 | while (*size * *count > MEM2MEM_VID_MEM_LIMIT) | |
764 | (*count)--; | |
765 | ||
766 | v4l2_info(&ctx->dev->v4l2_dev, | |
767 | "%d buffers of size %d set up.\n", *count, *size); | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static int m2mtest_buf_prepare(struct videobuf_queue *vq, | |
773 | struct videobuf_buffer *vb, | |
774 | enum v4l2_field field) | |
775 | { | |
776 | struct m2mtest_ctx *ctx = vq->priv_data; | |
777 | struct m2mtest_q_data *q_data; | |
778 | int ret; | |
779 | ||
780 | dprintk(ctx->dev, "type: %d, index: %d, state: %d\n", | |
781 | vq->type, vb->i, vb->state); | |
782 | ||
783 | q_data = get_q_data(vq->type); | |
784 | ||
785 | if (vb->baddr) { | |
786 | /* User-provided buffer */ | |
787 | if (vb->bsize < q_data->sizeimage) { | |
788 | /* Buffer too small to fit a frame */ | |
789 | v4l2_err(&ctx->dev->v4l2_dev, | |
790 | "User-provided buffer too small\n"); | |
791 | return -EINVAL; | |
792 | } | |
793 | } else if (vb->state != VIDEOBUF_NEEDS_INIT | |
794 | && vb->bsize < q_data->sizeimage) { | |
795 | /* We provide the buffer, but it's already been initialized | |
796 | * and is too small */ | |
797 | return -EINVAL; | |
798 | } | |
799 | ||
800 | vb->width = q_data->width; | |
801 | vb->height = q_data->height; | |
802 | vb->bytesperline = (q_data->width * q_data->fmt->depth) >> 3; | |
803 | vb->size = q_data->sizeimage; | |
804 | vb->field = field; | |
805 | ||
806 | if (VIDEOBUF_NEEDS_INIT == vb->state) { | |
807 | ret = videobuf_iolock(vq, vb, NULL); | |
808 | if (ret) { | |
809 | v4l2_err(&ctx->dev->v4l2_dev, | |
810 | "Iolock failed\n"); | |
811 | goto fail; | |
812 | } | |
813 | } | |
814 | ||
815 | vb->state = VIDEOBUF_PREPARED; | |
816 | ||
817 | return 0; | |
818 | fail: | |
819 | m2mtest_buf_release(vq, vb); | |
820 | return ret; | |
821 | } | |
822 | ||
823 | static void m2mtest_buf_queue(struct videobuf_queue *vq, | |
824 | struct videobuf_buffer *vb) | |
825 | { | |
826 | struct m2mtest_ctx *ctx = vq->priv_data; | |
827 | ||
828 | v4l2_m2m_buf_queue(ctx->m2m_ctx, vq, vb); | |
829 | } | |
830 | ||
831 | static struct videobuf_queue_ops m2mtest_qops = { | |
832 | .buf_setup = m2mtest_buf_setup, | |
833 | .buf_prepare = m2mtest_buf_prepare, | |
834 | .buf_queue = m2mtest_buf_queue, | |
835 | .buf_release = m2mtest_buf_release, | |
836 | }; | |
837 | ||
838 | static void queue_init(void *priv, struct videobuf_queue *vq, | |
839 | enum v4l2_buf_type type) | |
840 | { | |
841 | struct m2mtest_ctx *ctx = priv; | |
07e80305 | 842 | struct m2mtest_dev *dev = ctx->dev; |
96d8eab5 | 843 | |
07e80305 MS |
844 | videobuf_queue_vmalloc_init(vq, &m2mtest_qops, dev->v4l2_dev.dev, |
845 | &dev->irqlock, type, V4L2_FIELD_NONE, | |
846 | sizeof(struct m2mtest_buffer), priv, | |
847 | &dev->dev_mutex); | |
96d8eab5 PO |
848 | } |
849 | ||
850 | ||
851 | /* | |
852 | * File operations | |
853 | */ | |
854 | static int m2mtest_open(struct file *file) | |
855 | { | |
856 | struct m2mtest_dev *dev = video_drvdata(file); | |
857 | struct m2mtest_ctx *ctx = NULL; | |
858 | ||
859 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); | |
860 | if (!ctx) | |
861 | return -ENOMEM; | |
862 | ||
863 | file->private_data = ctx; | |
864 | ctx->dev = dev; | |
865 | ctx->translen = MEM2MEM_DEF_TRANSLEN; | |
866 | ctx->transtime = MEM2MEM_DEF_TRANSTIME; | |
867 | ctx->num_processed = 0; | |
868 | ||
869 | ctx->m2m_ctx = v4l2_m2m_ctx_init(ctx, dev->m2m_dev, queue_init); | |
870 | if (IS_ERR(ctx->m2m_ctx)) { | |
16ee9bb1 DC |
871 | int ret = PTR_ERR(ctx->m2m_ctx); |
872 | ||
96d8eab5 | 873 | kfree(ctx); |
16ee9bb1 | 874 | return ret; |
96d8eab5 PO |
875 | } |
876 | ||
877 | atomic_inc(&dev->num_inst); | |
878 | ||
879 | dprintk(dev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | static int m2mtest_release(struct file *file) | |
885 | { | |
886 | struct m2mtest_dev *dev = video_drvdata(file); | |
887 | struct m2mtest_ctx *ctx = file->private_data; | |
888 | ||
889 | dprintk(dev, "Releasing instance %p\n", ctx); | |
890 | ||
891 | v4l2_m2m_ctx_release(ctx->m2m_ctx); | |
892 | kfree(ctx); | |
893 | ||
894 | atomic_dec(&dev->num_inst); | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static unsigned int m2mtest_poll(struct file *file, | |
900 | struct poll_table_struct *wait) | |
901 | { | |
abf84383 | 902 | struct m2mtest_ctx *ctx = file->private_data; |
96d8eab5 PO |
903 | |
904 | return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); | |
905 | } | |
906 | ||
907 | static int m2mtest_mmap(struct file *file, struct vm_area_struct *vma) | |
908 | { | |
abf84383 | 909 | struct m2mtest_ctx *ctx = file->private_data; |
96d8eab5 PO |
910 | |
911 | return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); | |
912 | } | |
913 | ||
914 | static const struct v4l2_file_operations m2mtest_fops = { | |
915 | .owner = THIS_MODULE, | |
916 | .open = m2mtest_open, | |
917 | .release = m2mtest_release, | |
918 | .poll = m2mtest_poll, | |
07e80305 | 919 | .unlocked_ioctl = video_ioctl2, |
96d8eab5 PO |
920 | .mmap = m2mtest_mmap, |
921 | }; | |
922 | ||
923 | static struct video_device m2mtest_videodev = { | |
924 | .name = MEM2MEM_NAME, | |
925 | .fops = &m2mtest_fops, | |
926 | .ioctl_ops = &m2mtest_ioctl_ops, | |
927 | .minor = -1, | |
928 | .release = video_device_release, | |
929 | }; | |
930 | ||
931 | static struct v4l2_m2m_ops m2m_ops = { | |
932 | .device_run = device_run, | |
933 | .job_ready = job_ready, | |
934 | .job_abort = job_abort, | |
935 | }; | |
936 | ||
937 | static int m2mtest_probe(struct platform_device *pdev) | |
938 | { | |
939 | struct m2mtest_dev *dev; | |
940 | struct video_device *vfd; | |
941 | int ret; | |
942 | ||
943 | dev = kzalloc(sizeof *dev, GFP_KERNEL); | |
944 | if (!dev) | |
945 | return -ENOMEM; | |
946 | ||
947 | spin_lock_init(&dev->irqlock); | |
948 | ||
949 | ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); | |
950 | if (ret) | |
951 | goto free_dev; | |
952 | ||
953 | atomic_set(&dev->num_inst, 0); | |
954 | mutex_init(&dev->dev_mutex); | |
955 | ||
956 | vfd = video_device_alloc(); | |
957 | if (!vfd) { | |
958 | v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n"); | |
959 | ret = -ENOMEM; | |
960 | goto unreg_dev; | |
961 | } | |
962 | ||
963 | *vfd = m2mtest_videodev; | |
07e80305 | 964 | vfd->lock = &dev->dev_mutex; |
96d8eab5 PO |
965 | |
966 | ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); | |
967 | if (ret) { | |
968 | v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); | |
969 | goto rel_vdev; | |
970 | } | |
971 | ||
972 | video_set_drvdata(vfd, dev); | |
973 | snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name); | |
974 | dev->vfd = vfd; | |
975 | v4l2_info(&dev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME | |
976 | "Device registered as /dev/video%d\n", vfd->num); | |
977 | ||
978 | setup_timer(&dev->timer, device_isr, (long)dev); | |
979 | platform_set_drvdata(pdev, dev); | |
980 | ||
981 | dev->m2m_dev = v4l2_m2m_init(&m2m_ops); | |
982 | if (IS_ERR(dev->m2m_dev)) { | |
983 | v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n"); | |
984 | ret = PTR_ERR(dev->m2m_dev); | |
985 | goto err_m2m; | |
986 | } | |
987 | ||
b6ae906b PO |
988 | q_data[V4L2_M2M_SRC].fmt = &formats[0]; |
989 | q_data[V4L2_M2M_DST].fmt = &formats[0]; | |
990 | ||
96d8eab5 PO |
991 | return 0; |
992 | ||
993 | err_m2m: | |
994 | video_unregister_device(dev->vfd); | |
995 | rel_vdev: | |
996 | video_device_release(vfd); | |
997 | unreg_dev: | |
998 | v4l2_device_unregister(&dev->v4l2_dev); | |
999 | free_dev: | |
1000 | kfree(dev); | |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | static int m2mtest_remove(struct platform_device *pdev) | |
1006 | { | |
1007 | struct m2mtest_dev *dev = | |
1008 | (struct m2mtest_dev *)platform_get_drvdata(pdev); | |
1009 | ||
1010 | v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); | |
1011 | v4l2_m2m_release(dev->m2m_dev); | |
1012 | del_timer_sync(&dev->timer); | |
1013 | video_unregister_device(dev->vfd); | |
1014 | v4l2_device_unregister(&dev->v4l2_dev); | |
1015 | kfree(dev); | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static struct platform_driver m2mtest_pdrv = { | |
1021 | .probe = m2mtest_probe, | |
1022 | .remove = m2mtest_remove, | |
1023 | .driver = { | |
1024 | .name = MEM2MEM_NAME, | |
1025 | .owner = THIS_MODULE, | |
1026 | }, | |
1027 | }; | |
1028 | ||
1029 | static void __exit m2mtest_exit(void) | |
1030 | { | |
1031 | platform_driver_unregister(&m2mtest_pdrv); | |
1032 | platform_device_unregister(&m2mtest_pdev); | |
1033 | } | |
1034 | ||
1035 | static int __init m2mtest_init(void) | |
1036 | { | |
1037 | int ret; | |
1038 | ||
1039 | ret = platform_device_register(&m2mtest_pdev); | |
1040 | if (ret) | |
1041 | return ret; | |
1042 | ||
1043 | ret = platform_driver_register(&m2mtest_pdrv); | |
1044 | if (ret) | |
1045 | platform_device_unregister(&m2mtest_pdev); | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | module_init(m2mtest_init); | |
1051 | module_exit(m2mtest_exit); | |
1052 |