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