1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <linux/module.h>
16#include <linux/clk.h>
17#include <linux/slab.h>
18#include <linux/interrupt.h>
19#include <linux/io.h>
20
21#include <linux/platform_device.h>
22#include <media/v4l2-mem2mem.h>
23#include <media/v4l2-device.h>
24#include <media/v4l2-ioctl.h>
25#include <media/videobuf2-dma-contig.h>
26#include <linux/sizes.h>
27
28#define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
29
30MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
31MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
32MODULE_LICENSE("GPL");
33MODULE_VERSION("0.0.1");
34
35static bool debug;
36module_param(debug, bool, 0644);
37
38#define MIN_W 32
39#define MIN_H 32
40#define MAX_W 2040
41#define MAX_H 2046
42
43#define S_ALIGN 1
44#define W_ALIGN_YUV420 3
45#define W_ALIGN_OTHERS 2
46#define H_ALIGN 1
47
48
49#define MEM2MEM_CAPTURE (1 << 0)
50#define MEM2MEM_OUTPUT (1 << 1)
51
52#define MEM2MEM_NAME "m2m-emmaprp"
53
54
55#define MEM2MEM_VID_MEM_LIMIT SZ_16M
56
57#define dprintk(dev, fmt, arg...) \
58 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
59
60
61#define PRP_CNTL 0x00
62#define PRP_INTR_CNTL 0x04
63#define PRP_INTRSTATUS 0x08
64#define PRP_SOURCE_Y_PTR 0x0c
65#define PRP_SOURCE_CB_PTR 0x10
66#define PRP_SOURCE_CR_PTR 0x14
67#define PRP_DEST_RGB1_PTR 0x18
68#define PRP_DEST_RGB2_PTR 0x1c
69#define PRP_DEST_Y_PTR 0x20
70#define PRP_DEST_CB_PTR 0x24
71#define PRP_DEST_CR_PTR 0x28
72#define PRP_SRC_FRAME_SIZE 0x2c
73#define PRP_DEST_CH1_LINE_STRIDE 0x30
74#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
75#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
76#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
77#define PRP_CH2_OUT_IMAGE_SIZE 0x40
78#define PRP_SRC_LINE_STRIDE 0x44
79#define PRP_CSC_COEF_012 0x48
80#define PRP_CSC_COEF_345 0x4c
81#define PRP_CSC_COEF_678 0x50
82#define PRP_CH1_RZ_HORI_COEF1 0x54
83#define PRP_CH1_RZ_HORI_COEF2 0x58
84#define PRP_CH1_RZ_HORI_VALID 0x5c
85#define PRP_CH1_RZ_VERT_COEF1 0x60
86#define PRP_CH1_RZ_VERT_COEF2 0x64
87#define PRP_CH1_RZ_VERT_VALID 0x68
88#define PRP_CH2_RZ_HORI_COEF1 0x6c
89#define PRP_CH2_RZ_HORI_COEF2 0x70
90#define PRP_CH2_RZ_HORI_VALID 0x74
91#define PRP_CH2_RZ_VERT_COEF1 0x78
92#define PRP_CH2_RZ_VERT_COEF2 0x7c
93#define PRP_CH2_RZ_VERT_VALID 0x80
94
95#define PRP_CNTL_CH1EN (1 << 0)
96#define PRP_CNTL_CH2EN (1 << 1)
97#define PRP_CNTL_CSIEN (1 << 2)
98#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
99#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
100#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
101#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
102#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
103#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
104#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
105#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
106#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
107#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
108#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
109#define PRP_CNTL_CH1_LEN (1 << 9)
110#define PRP_CNTL_CH2_LEN (1 << 10)
111#define PRP_CNTL_SKIP_FRAME (1 << 11)
112#define PRP_CNTL_SWRST (1 << 12)
113#define PRP_CNTL_CLKEN (1 << 13)
114#define PRP_CNTL_WEN (1 << 14)
115#define PRP_CNTL_CH1BYP (1 << 15)
116#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
117#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
118#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
119#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
120#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
121#define PRP_CNTL_CH2B1EN (1 << 29)
122#define PRP_CNTL_CH2B2EN (1 << 30)
123#define PRP_CNTL_CH2FEN (1 << 31)
124
125#define PRP_SIZE_HEIGHT(x) (x)
126#define PRP_SIZE_WIDTH(x) ((x) << 16)
127
128
129#define PRP_INTR_RDERR (1 << 0)
130#define PRP_INTR_CH1WERR (1 << 1)
131#define PRP_INTR_CH2WERR (1 << 2)
132#define PRP_INTR_CH1FC (1 << 3)
133#define PRP_INTR_CH2FC (1 << 5)
134#define PRP_INTR_LBOVF (1 << 7)
135#define PRP_INTR_CH2OVF (1 << 8)
136
137#define PRP_INTR_ST_RDERR (1 << 0)
138#define PRP_INTR_ST_CH1WERR (1 << 1)
139#define PRP_INTR_ST_CH2WERR (1 << 2)
140#define PRP_INTR_ST_CH2B2CI (1 << 3)
141#define PRP_INTR_ST_CH2B1CI (1 << 4)
142#define PRP_INTR_ST_CH1B2CI (1 << 5)
143#define PRP_INTR_ST_CH1B1CI (1 << 6)
144#define PRP_INTR_ST_LBOVF (1 << 7)
145#define PRP_INTR_ST_CH2OVF (1 << 8)
146
147struct emmaprp_fmt {
148 char *name;
149 u32 fourcc;
150
151 u32 types;
152};
153
154static struct emmaprp_fmt formats[] = {
155 {
156 .name = "YUV 4:2:0 Planar",
157 .fourcc = V4L2_PIX_FMT_YUV420,
158 .types = MEM2MEM_CAPTURE,
159 },
160 {
161 .name = "4:2:2, packed, YUYV",
162 .fourcc = V4L2_PIX_FMT_YUYV,
163 .types = MEM2MEM_OUTPUT,
164 },
165};
166
167
168struct emmaprp_q_data {
169 unsigned int width;
170 unsigned int height;
171 unsigned int sizeimage;
172 struct emmaprp_fmt *fmt;
173};
174
175enum {
176 V4L2_M2M_SRC = 0,
177 V4L2_M2M_DST = 1,
178};
179
180#define NUM_FORMATS ARRAY_SIZE(formats)
181
182static struct emmaprp_fmt *find_format(struct v4l2_format *f)
183{
184 struct emmaprp_fmt *fmt;
185 unsigned int k;
186
187 for (k = 0; k < NUM_FORMATS; k++) {
188 fmt = &formats[k];
189 if (fmt->fourcc == f->fmt.pix.pixelformat)
190 break;
191 }
192
193 if (k == NUM_FORMATS)
194 return NULL;
195
196 return &formats[k];
197}
198
199struct emmaprp_dev {
200 struct v4l2_device v4l2_dev;
201 struct video_device *vfd;
202
203 struct mutex dev_mutex;
204 spinlock_t irqlock;
205
206 void __iomem *base_emma;
207 struct clk *clk_emma_ahb, *clk_emma_ipg;
208
209 struct v4l2_m2m_dev *m2m_dev;
210};
211
212struct emmaprp_ctx {
213 struct emmaprp_dev *dev;
214
215 int aborting;
216 struct emmaprp_q_data q_data[2];
217 struct v4l2_m2m_ctx *m2m_ctx;
218};
219
220static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
221 enum v4l2_buf_type type)
222{
223 switch (type) {
224 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
225 return &(ctx->q_data[V4L2_M2M_SRC]);
226 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
227 return &(ctx->q_data[V4L2_M2M_DST]);
228 default:
229 BUG();
230 }
231 return NULL;
232}
233
234
235
236
237static void emmaprp_job_abort(void *priv)
238{
239 struct emmaprp_ctx *ctx = priv;
240 struct emmaprp_dev *pcdev = ctx->dev;
241
242 ctx->aborting = 1;
243
244 dprintk(pcdev, "Aborting task\n");
245
246 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
247}
248
249static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
250{
251 dprintk(pcdev,
252 "eMMa-PrP Registers:\n"
253 " SOURCE_Y_PTR = 0x%08X\n"
254 " SRC_FRAME_SIZE = 0x%08X\n"
255 " DEST_Y_PTR = 0x%08X\n"
256 " DEST_CR_PTR = 0x%08X\n"
257 " DEST_CB_PTR = 0x%08X\n"
258 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
259 " CNTL = 0x%08X\n",
260 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
261 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
262 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
263 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
264 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
265 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
266 readl(pcdev->base_emma + PRP_CNTL));
267}
268
269static void emmaprp_device_run(void *priv)
270{
271 struct emmaprp_ctx *ctx = priv;
272 struct emmaprp_q_data *s_q_data, *d_q_data;
273 struct vb2_v4l2_buffer *src_buf, *dst_buf;
274 struct emmaprp_dev *pcdev = ctx->dev;
275 unsigned int s_width, s_height;
276 unsigned int d_width, d_height;
277 unsigned int d_size;
278 dma_addr_t p_in, p_out;
279 u32 tmp;
280
281 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
282 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
283
284 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
285 s_width = s_q_data->width;
286 s_height = s_q_data->height;
287
288 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
289 d_width = d_q_data->width;
290 d_height = d_q_data->height;
291 d_size = d_width * d_height;
292
293 p_in = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
294 p_out = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
295 if (!p_in || !p_out) {
296 v4l2_err(&pcdev->v4l2_dev,
297 "Acquiring kernel pointers to buffers failed\n");
298 return;
299 }
300
301
302 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
303 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
304 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
305
306
307 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
308 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
309 writel(p_out + d_size + (d_size >> 2),
310 pcdev->base_emma + PRP_DEST_CR_PTR);
311 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
312 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
313
314
315 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
316 writel(tmp | PRP_INTR_RDERR |
317 PRP_INTR_CH2WERR |
318 PRP_INTR_CH2FC,
319 pcdev->base_emma + PRP_INTR_CNTL);
320
321 emmaprp_dump_regs(pcdev);
322
323
324 tmp = readl(pcdev->base_emma + PRP_CNTL);
325 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
326 PRP_CNTL_DATA_IN_YUV422 |
327 PRP_CNTL_CH2EN,
328 pcdev->base_emma + PRP_CNTL);
329}
330
331static irqreturn_t emmaprp_irq(int irq_emma, void *data)
332{
333 struct emmaprp_dev *pcdev = data;
334 struct emmaprp_ctx *curr_ctx;
335 struct vb2_v4l2_buffer *src_vb, *dst_vb;
336 unsigned long flags;
337 u32 irqst;
338
339
340 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
341 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
342 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
343
344 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
345 if (curr_ctx == NULL) {
346 pr_err("Instance released before the end of transaction\n");
347 return IRQ_HANDLED;
348 }
349
350 if (!curr_ctx->aborting) {
351 if ((irqst & PRP_INTR_ST_RDERR) ||
352 (irqst & PRP_INTR_ST_CH2WERR)) {
353 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
354 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
355 } else if (irqst & PRP_INTR_ST_CH2B1CI) {
356 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
357 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
358
359 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
360 dst_vb->flags &=
361 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
362 dst_vb->flags |=
363 src_vb->flags
364 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
365 dst_vb->timecode = src_vb->timecode;
366
367 spin_lock_irqsave(&pcdev->irqlock, flags);
368 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
369 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
370 spin_unlock_irqrestore(&pcdev->irqlock, flags);
371 }
372 }
373
374 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
375 return IRQ_HANDLED;
376}
377
378
379
380
381static int vidioc_querycap(struct file *file, void *priv,
382 struct v4l2_capability *cap)
383{
384 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
385 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
386 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
387 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
388 return 0;
389}
390
391static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
392{
393 int i, num;
394 struct emmaprp_fmt *fmt;
395
396 num = 0;
397
398 for (i = 0; i < NUM_FORMATS; ++i) {
399 if (formats[i].types & type) {
400
401 if (num == f->index)
402 break;
403
404
405 ++num;
406 }
407 }
408
409 if (i < NUM_FORMATS) {
410
411 fmt = &formats[i];
412 strscpy(f->description, fmt->name, sizeof(f->description) - 1);
413 f->pixelformat = fmt->fourcc;
414 return 0;
415 }
416
417
418 return -EINVAL;
419}
420
421static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
422 struct v4l2_fmtdesc *f)
423{
424 return enum_fmt(f, MEM2MEM_CAPTURE);
425}
426
427static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
428 struct v4l2_fmtdesc *f)
429{
430 return enum_fmt(f, MEM2MEM_OUTPUT);
431}
432
433static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
434{
435 struct vb2_queue *vq;
436 struct emmaprp_q_data *q_data;
437
438 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
439 if (!vq)
440 return -EINVAL;
441
442 q_data = get_q_data(ctx, f->type);
443
444 f->fmt.pix.width = q_data->width;
445 f->fmt.pix.height = q_data->height;
446 f->fmt.pix.field = V4L2_FIELD_NONE;
447 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
448 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
449 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
450 else
451 f->fmt.pix.bytesperline = q_data->width * 2;
452 f->fmt.pix.sizeimage = q_data->sizeimage;
453
454 return 0;
455}
456
457static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
458 struct v4l2_format *f)
459{
460 return vidioc_g_fmt(priv, f);
461}
462
463static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
464 struct v4l2_format *f)
465{
466 return vidioc_g_fmt(priv, f);
467}
468
469static int vidioc_try_fmt(struct v4l2_format *f)
470{
471 enum v4l2_field field;
472
473
474 if (!find_format(f))
475 return -EINVAL;
476
477 field = f->fmt.pix.field;
478 if (field == V4L2_FIELD_ANY)
479 field = V4L2_FIELD_NONE;
480 else if (V4L2_FIELD_NONE != field)
481 return -EINVAL;
482
483
484
485 f->fmt.pix.field = field;
486
487 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
488 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
489 W_ALIGN_YUV420, &f->fmt.pix.height,
490 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
491 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
492 } else {
493 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
494 W_ALIGN_OTHERS, &f->fmt.pix.height,
495 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
496 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
497 }
498 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
499
500 return 0;
501}
502
503static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
504 struct v4l2_format *f)
505{
506 struct emmaprp_fmt *fmt;
507 struct emmaprp_ctx *ctx = priv;
508
509 fmt = find_format(f);
510 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
511 v4l2_err(&ctx->dev->v4l2_dev,
512 "Fourcc format (0x%08x) invalid.\n",
513 f->fmt.pix.pixelformat);
514 return -EINVAL;
515 }
516
517 return vidioc_try_fmt(f);
518}
519
520static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
521 struct v4l2_format *f)
522{
523 struct emmaprp_fmt *fmt;
524 struct emmaprp_ctx *ctx = priv;
525
526 fmt = find_format(f);
527 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
528 v4l2_err(&ctx->dev->v4l2_dev,
529 "Fourcc format (0x%08x) invalid.\n",
530 f->fmt.pix.pixelformat);
531 return -EINVAL;
532 }
533
534 return vidioc_try_fmt(f);
535}
536
537static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
538{
539 struct emmaprp_q_data *q_data;
540 struct vb2_queue *vq;
541 int ret;
542
543 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
544 if (!vq)
545 return -EINVAL;
546
547 q_data = get_q_data(ctx, f->type);
548 if (!q_data)
549 return -EINVAL;
550
551 if (vb2_is_busy(vq)) {
552 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
553 return -EBUSY;
554 }
555
556 ret = vidioc_try_fmt(f);
557 if (ret)
558 return ret;
559
560 q_data->fmt = find_format(f);
561 q_data->width = f->fmt.pix.width;
562 q_data->height = f->fmt.pix.height;
563 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
564 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
565 else
566 q_data->sizeimage = q_data->width * q_data->height * 2;
567
568 dprintk(ctx->dev,
569 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
570 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
571
572 return 0;
573}
574
575static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
576 struct v4l2_format *f)
577{
578 int ret;
579
580 ret = vidioc_try_fmt_vid_cap(file, priv, f);
581 if (ret)
582 return ret;
583
584 return vidioc_s_fmt(priv, f);
585}
586
587static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
588 struct v4l2_format *f)
589{
590 int ret;
591
592 ret = vidioc_try_fmt_vid_out(file, priv, f);
593 if (ret)
594 return ret;
595
596 return vidioc_s_fmt(priv, f);
597}
598
599static int vidioc_reqbufs(struct file *file, void *priv,
600 struct v4l2_requestbuffers *reqbufs)
601{
602 struct emmaprp_ctx *ctx = priv;
603
604 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
605}
606
607static int vidioc_querybuf(struct file *file, void *priv,
608 struct v4l2_buffer *buf)
609{
610 struct emmaprp_ctx *ctx = priv;
611
612 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
613}
614
615static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
616{
617 struct emmaprp_ctx *ctx = priv;
618
619 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
620}
621
622static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
623{
624 struct emmaprp_ctx *ctx = priv;
625
626 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
627}
628
629static int vidioc_streamon(struct file *file, void *priv,
630 enum v4l2_buf_type type)
631{
632 struct emmaprp_ctx *ctx = priv;
633
634 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
635}
636
637static int vidioc_streamoff(struct file *file, void *priv,
638 enum v4l2_buf_type type)
639{
640 struct emmaprp_ctx *ctx = priv;
641
642 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
643}
644
645static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
646 .vidioc_querycap = vidioc_querycap,
647
648 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
649 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
650 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
651 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
652
653 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
654 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
655 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
656 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
657
658 .vidioc_reqbufs = vidioc_reqbufs,
659 .vidioc_querybuf = vidioc_querybuf,
660
661 .vidioc_qbuf = vidioc_qbuf,
662 .vidioc_dqbuf = vidioc_dqbuf,
663
664 .vidioc_streamon = vidioc_streamon,
665 .vidioc_streamoff = vidioc_streamoff,
666};
667
668
669
670
671
672static int emmaprp_queue_setup(struct vb2_queue *vq,
673 unsigned int *nbuffers, unsigned int *nplanes,
674 unsigned int sizes[], struct device *alloc_devs[])
675{
676 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
677 struct emmaprp_q_data *q_data;
678 unsigned int size, count = *nbuffers;
679
680 q_data = get_q_data(ctx, vq->type);
681
682 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
683 size = q_data->width * q_data->height * 3 / 2;
684 else
685 size = q_data->width * q_data->height * 2;
686
687 while (size * count > MEM2MEM_VID_MEM_LIMIT)
688 (count)--;
689
690 *nplanes = 1;
691 *nbuffers = count;
692 sizes[0] = size;
693
694 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
695
696 return 0;
697}
698
699static int emmaprp_buf_prepare(struct vb2_buffer *vb)
700{
701 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
702 struct emmaprp_q_data *q_data;
703
704 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
705
706 q_data = get_q_data(ctx, vb->vb2_queue->type);
707
708 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
709 dprintk(ctx->dev,
710 "%s data will not fit into plane(%lu < %lu)\n",
711 __func__, vb2_plane_size(vb, 0),
712 (long)q_data->sizeimage);
713 return -EINVAL;
714 }
715
716 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
717
718 return 0;
719}
720
721static void emmaprp_buf_queue(struct vb2_buffer *vb)
722{
723 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
724 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
725 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
726}
727
728static const struct vb2_ops emmaprp_qops = {
729 .queue_setup = emmaprp_queue_setup,
730 .buf_prepare = emmaprp_buf_prepare,
731 .buf_queue = emmaprp_buf_queue,
732 .wait_prepare = vb2_ops_wait_prepare,
733 .wait_finish = vb2_ops_wait_finish,
734};
735
736static int queue_init(void *priv, struct vb2_queue *src_vq,
737 struct vb2_queue *dst_vq)
738{
739 struct emmaprp_ctx *ctx = priv;
740 int ret;
741
742 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
743 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
744 src_vq->drv_priv = ctx;
745 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
746 src_vq->ops = &emmaprp_qops;
747 src_vq->mem_ops = &vb2_dma_contig_memops;
748 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
749 src_vq->dev = ctx->dev->v4l2_dev.dev;
750 src_vq->lock = &ctx->dev->dev_mutex;
751
752 ret = vb2_queue_init(src_vq);
753 if (ret)
754 return ret;
755
756 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
757 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
758 dst_vq->drv_priv = ctx;
759 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
760 dst_vq->ops = &emmaprp_qops;
761 dst_vq->mem_ops = &vb2_dma_contig_memops;
762 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
763 dst_vq->dev = ctx->dev->v4l2_dev.dev;
764 dst_vq->lock = &ctx->dev->dev_mutex;
765
766 return vb2_queue_init(dst_vq);
767}
768
769
770
771
772static int emmaprp_open(struct file *file)
773{
774 struct emmaprp_dev *pcdev = video_drvdata(file);
775 struct emmaprp_ctx *ctx;
776
777 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
778 if (!ctx)
779 return -ENOMEM;
780
781 file->private_data = ctx;
782 ctx->dev = pcdev;
783
784 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
785 kfree(ctx);
786 return -ERESTARTSYS;
787 }
788
789 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
790
791 if (IS_ERR(ctx->m2m_ctx)) {
792 int ret = PTR_ERR(ctx->m2m_ctx);
793
794 mutex_unlock(&pcdev->dev_mutex);
795 kfree(ctx);
796 return ret;
797 }
798
799 clk_prepare_enable(pcdev->clk_emma_ipg);
800 clk_prepare_enable(pcdev->clk_emma_ahb);
801 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
802 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
803 mutex_unlock(&pcdev->dev_mutex);
804
805 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
806
807 return 0;
808}
809
810static int emmaprp_release(struct file *file)
811{
812 struct emmaprp_dev *pcdev = video_drvdata(file);
813 struct emmaprp_ctx *ctx = file->private_data;
814
815 dprintk(pcdev, "Releasing instance %p\n", ctx);
816
817 mutex_lock(&pcdev->dev_mutex);
818 clk_disable_unprepare(pcdev->clk_emma_ahb);
819 clk_disable_unprepare(pcdev->clk_emma_ipg);
820 v4l2_m2m_ctx_release(ctx->m2m_ctx);
821 mutex_unlock(&pcdev->dev_mutex);
822 kfree(ctx);
823
824 return 0;
825}
826
827static __poll_t emmaprp_poll(struct file *file,
828 struct poll_table_struct *wait)
829{
830 struct emmaprp_dev *pcdev = video_drvdata(file);
831 struct emmaprp_ctx *ctx = file->private_data;
832 __poll_t res;
833
834 mutex_lock(&pcdev->dev_mutex);
835 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
836 mutex_unlock(&pcdev->dev_mutex);
837 return res;
838}
839
840static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
841{
842 struct emmaprp_dev *pcdev = video_drvdata(file);
843 struct emmaprp_ctx *ctx = file->private_data;
844 int ret;
845
846 if (mutex_lock_interruptible(&pcdev->dev_mutex))
847 return -ERESTARTSYS;
848 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
849 mutex_unlock(&pcdev->dev_mutex);
850 return ret;
851}
852
853static const struct v4l2_file_operations emmaprp_fops = {
854 .owner = THIS_MODULE,
855 .open = emmaprp_open,
856 .release = emmaprp_release,
857 .poll = emmaprp_poll,
858 .unlocked_ioctl = video_ioctl2,
859 .mmap = emmaprp_mmap,
860};
861
862static const struct video_device emmaprp_videodev = {
863 .name = MEM2MEM_NAME,
864 .fops = &emmaprp_fops,
865 .ioctl_ops = &emmaprp_ioctl_ops,
866 .minor = -1,
867 .release = video_device_release,
868 .vfl_dir = VFL_DIR_M2M,
869};
870
871static const struct v4l2_m2m_ops m2m_ops = {
872 .device_run = emmaprp_device_run,
873 .job_abort = emmaprp_job_abort,
874};
875
876static int emmaprp_probe(struct platform_device *pdev)
877{
878 struct emmaprp_dev *pcdev;
879 struct video_device *vfd;
880 struct resource *res;
881 int irq, ret;
882
883 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
884 if (!pcdev)
885 return -ENOMEM;
886
887 spin_lock_init(&pcdev->irqlock);
888
889 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
890 if (IS_ERR(pcdev->clk_emma_ipg)) {
891 return PTR_ERR(pcdev->clk_emma_ipg);
892 }
893
894 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
895 if (IS_ERR(pcdev->clk_emma_ahb))
896 return PTR_ERR(pcdev->clk_emma_ahb);
897
898 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
899 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
900 if (IS_ERR(pcdev->base_emma))
901 return PTR_ERR(pcdev->base_emma);
902
903 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
904 if (ret)
905 return ret;
906
907 mutex_init(&pcdev->dev_mutex);
908
909 vfd = video_device_alloc();
910 if (!vfd) {
911 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
912 ret = -ENOMEM;
913 goto unreg_dev;
914 }
915
916 *vfd = emmaprp_videodev;
917 vfd->lock = &pcdev->dev_mutex;
918 vfd->v4l2_dev = &pcdev->v4l2_dev;
919
920 video_set_drvdata(vfd, pcdev);
921 pcdev->vfd = vfd;
922 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
923 " Device registered as /dev/video%d\n", vfd->num);
924
925 platform_set_drvdata(pdev, pcdev);
926
927 irq = platform_get_irq(pdev, 0);
928 if (irq < 0)
929 return irq;
930 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
931 dev_name(&pdev->dev), pcdev);
932 if (ret)
933 goto rel_vdev;
934
935 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
936 if (IS_ERR(pcdev->m2m_dev)) {
937 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
938 ret = PTR_ERR(pcdev->m2m_dev);
939 goto rel_vdev;
940 }
941
942 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
943 if (ret) {
944 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
945 goto rel_m2m;
946 }
947
948 return 0;
949
950
951rel_m2m:
952 v4l2_m2m_release(pcdev->m2m_dev);
953rel_vdev:
954 video_device_release(vfd);
955unreg_dev:
956 v4l2_device_unregister(&pcdev->v4l2_dev);
957
958 mutex_destroy(&pcdev->dev_mutex);
959
960 return ret;
961}
962
963static int emmaprp_remove(struct platform_device *pdev)
964{
965 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
966
967 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
968
969 video_unregister_device(pcdev->vfd);
970 v4l2_m2m_release(pcdev->m2m_dev);
971 v4l2_device_unregister(&pcdev->v4l2_dev);
972 mutex_destroy(&pcdev->dev_mutex);
973
974 return 0;
975}
976
977static struct platform_driver emmaprp_pdrv = {
978 .probe = emmaprp_probe,
979 .remove = emmaprp_remove,
980 .driver = {
981 .name = MEM2MEM_NAME,
982 },
983};
984module_platform_driver(emmaprp_pdrv);
985
