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19#include <linux/module.h>
20#include <linux/clk.h>
21#include <linux/slab.h>
22#include <linux/interrupt.h>
23#include <linux/io.h>
24
25#include <linux/platform_device.h>
26#include <media/v4l2-mem2mem.h>
27#include <media/v4l2-device.h>
28#include <media/v4l2-ioctl.h>
29#include <media/videobuf2-dma-contig.h>
30#include <asm/sizes.h>
31
32#define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
33
34MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
35MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
36MODULE_LICENSE("GPL");
37MODULE_VERSION("0.0.1");
38
39static bool debug;
40module_param(debug, bool, 0644);
41
42#define MIN_W 32
43#define MIN_H 32
44#define MAX_W 2040
45#define MAX_H 2046
46
47#define S_ALIGN 1
48#define W_ALIGN_YUV420 3
49#define W_ALIGN_OTHERS 2
50#define H_ALIGN 1
51
52
53#define MEM2MEM_CAPTURE (1 << 0)
54#define MEM2MEM_OUTPUT (1 << 1)
55
56#define MEM2MEM_NAME "m2m-emmaprp"
57
58
59#define MEM2MEM_VID_MEM_LIMIT SZ_16M
60
61#define dprintk(dev, fmt, arg...) \
62 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
63
64
65#define PRP_CNTL 0x00
66#define PRP_INTR_CNTL 0x04
67#define PRP_INTRSTATUS 0x08
68#define PRP_SOURCE_Y_PTR 0x0c
69#define PRP_SOURCE_CB_PTR 0x10
70#define PRP_SOURCE_CR_PTR 0x14
71#define PRP_DEST_RGB1_PTR 0x18
72#define PRP_DEST_RGB2_PTR 0x1c
73#define PRP_DEST_Y_PTR 0x20
74#define PRP_DEST_CB_PTR 0x24
75#define PRP_DEST_CR_PTR 0x28
76#define PRP_SRC_FRAME_SIZE 0x2c
77#define PRP_DEST_CH1_LINE_STRIDE 0x30
78#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
79#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
80#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
81#define PRP_CH2_OUT_IMAGE_SIZE 0x40
82#define PRP_SRC_LINE_STRIDE 0x44
83#define PRP_CSC_COEF_012 0x48
84#define PRP_CSC_COEF_345 0x4c
85#define PRP_CSC_COEF_678 0x50
86#define PRP_CH1_RZ_HORI_COEF1 0x54
87#define PRP_CH1_RZ_HORI_COEF2 0x58
88#define PRP_CH1_RZ_HORI_VALID 0x5c
89#define PRP_CH1_RZ_VERT_COEF1 0x60
90#define PRP_CH1_RZ_VERT_COEF2 0x64
91#define PRP_CH1_RZ_VERT_VALID 0x68
92#define PRP_CH2_RZ_HORI_COEF1 0x6c
93#define PRP_CH2_RZ_HORI_COEF2 0x70
94#define PRP_CH2_RZ_HORI_VALID 0x74
95#define PRP_CH2_RZ_VERT_COEF1 0x78
96#define PRP_CH2_RZ_VERT_COEF2 0x7c
97#define PRP_CH2_RZ_VERT_VALID 0x80
98
99#define PRP_CNTL_CH1EN (1 << 0)
100#define PRP_CNTL_CH2EN (1 << 1)
101#define PRP_CNTL_CSIEN (1 << 2)
102#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
103#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
104#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
105#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
106#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
107#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
108#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
109#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
110#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
111#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
112#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
113#define PRP_CNTL_CH1_LEN (1 << 9)
114#define PRP_CNTL_CH2_LEN (1 << 10)
115#define PRP_CNTL_SKIP_FRAME (1 << 11)
116#define PRP_CNTL_SWRST (1 << 12)
117#define PRP_CNTL_CLKEN (1 << 13)
118#define PRP_CNTL_WEN (1 << 14)
119#define PRP_CNTL_CH1BYP (1 << 15)
120#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
121#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
122#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
123#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
124#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
125#define PRP_CNTL_CH2B1EN (1 << 29)
126#define PRP_CNTL_CH2B2EN (1 << 30)
127#define PRP_CNTL_CH2FEN (1 << 31)
128
129#define PRP_SIZE_HEIGHT(x) (x)
130#define PRP_SIZE_WIDTH(x) ((x) << 16)
131
132
133#define PRP_INTR_RDERR (1 << 0)
134#define PRP_INTR_CH1WERR (1 << 1)
135#define PRP_INTR_CH2WERR (1 << 2)
136#define PRP_INTR_CH1FC (1 << 3)
137#define PRP_INTR_CH2FC (1 << 5)
138#define PRP_INTR_LBOVF (1 << 7)
139#define PRP_INTR_CH2OVF (1 << 8)
140
141#define PRP_INTR_ST_RDERR (1 << 0)
142#define PRP_INTR_ST_CH1WERR (1 << 1)
143#define PRP_INTR_ST_CH2WERR (1 << 2)
144#define PRP_INTR_ST_CH2B2CI (1 << 3)
145#define PRP_INTR_ST_CH2B1CI (1 << 4)
146#define PRP_INTR_ST_CH1B2CI (1 << 5)
147#define PRP_INTR_ST_CH1B1CI (1 << 6)
148#define PRP_INTR_ST_LBOVF (1 << 7)
149#define PRP_INTR_ST_CH2OVF (1 << 8)
150
151struct emmaprp_fmt {
152 char *name;
153 u32 fourcc;
154
155 u32 types;
156};
157
158static struct emmaprp_fmt formats[] = {
159 {
160 .name = "YUV 4:2:0 Planar",
161 .fourcc = V4L2_PIX_FMT_YUV420,
162 .types = MEM2MEM_CAPTURE,
163 },
164 {
165 .name = "4:2:2, packed, YUYV",
166 .fourcc = V4L2_PIX_FMT_YUYV,
167 .types = MEM2MEM_OUTPUT,
168 },
169};
170
171
172struct emmaprp_q_data {
173 unsigned int width;
174 unsigned int height;
175 unsigned int sizeimage;
176 struct emmaprp_fmt *fmt;
177};
178
179enum {
180 V4L2_M2M_SRC = 0,
181 V4L2_M2M_DST = 1,
182};
183
184#define NUM_FORMATS ARRAY_SIZE(formats)
185
186static struct emmaprp_fmt *find_format(struct v4l2_format *f)
187{
188 struct emmaprp_fmt *fmt;
189 unsigned int k;
190
191 for (k = 0; k < NUM_FORMATS; k++) {
192 fmt = &formats[k];
193 if (fmt->fourcc == f->fmt.pix.pixelformat)
194 break;
195 }
196
197 if (k == NUM_FORMATS)
198 return NULL;
199
200 return &formats[k];
201}
202
203struct emmaprp_dev {
204 struct v4l2_device v4l2_dev;
205 struct video_device *vfd;
206
207 struct mutex dev_mutex;
208 spinlock_t irqlock;
209
210 int irq_emma;
211 void __iomem *base_emma;
212 struct clk *clk_emma_ahb, *clk_emma_ipg;
213 struct resource *res_emma;
214
215 struct v4l2_m2m_dev *m2m_dev;
216 struct vb2_alloc_ctx *alloc_ctx;
217};
218
219struct emmaprp_ctx {
220 struct emmaprp_dev *dev;
221
222 int aborting;
223 struct emmaprp_q_data q_data[2];
224 struct v4l2_m2m_ctx *m2m_ctx;
225};
226
227static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
228 enum v4l2_buf_type type)
229{
230 switch (type) {
231 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
232 return &(ctx->q_data[V4L2_M2M_SRC]);
233 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
234 return &(ctx->q_data[V4L2_M2M_DST]);
235 default:
236 BUG();
237 }
238 return NULL;
239}
240
241
242
243
244static void emmaprp_job_abort(void *priv)
245{
246 struct emmaprp_ctx *ctx = priv;
247 struct emmaprp_dev *pcdev = ctx->dev;
248
249 ctx->aborting = 1;
250
251 dprintk(pcdev, "Aborting task\n");
252
253 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
254}
255
256static void emmaprp_lock(void *priv)
257{
258 struct emmaprp_ctx *ctx = priv;
259 struct emmaprp_dev *pcdev = ctx->dev;
260 mutex_lock(&pcdev->dev_mutex);
261}
262
263static void emmaprp_unlock(void *priv)
264{
265 struct emmaprp_ctx *ctx = priv;
266 struct emmaprp_dev *pcdev = ctx->dev;
267 mutex_unlock(&pcdev->dev_mutex);
268}
269
270static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
271{
272 dprintk(pcdev,
273 "eMMa-PrP Registers:\n"
274 " SOURCE_Y_PTR = 0x%08X\n"
275 " SRC_FRAME_SIZE = 0x%08X\n"
276 " DEST_Y_PTR = 0x%08X\n"
277 " DEST_CR_PTR = 0x%08X\n"
278 " DEST_CB_PTR = 0x%08X\n"
279 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
280 " CNTL = 0x%08X\n",
281 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
282 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
283 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
284 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
285 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
286 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
287 readl(pcdev->base_emma + PRP_CNTL));
288}
289
290static void emmaprp_device_run(void *priv)
291{
292 struct emmaprp_ctx *ctx = priv;
293 struct emmaprp_q_data *s_q_data, *d_q_data;
294 struct vb2_buffer *src_buf, *dst_buf;
295 struct emmaprp_dev *pcdev = ctx->dev;
296 unsigned int s_width, s_height;
297 unsigned int d_width, d_height;
298 unsigned int d_size;
299 dma_addr_t p_in, p_out;
300 u32 tmp;
301
302 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
303 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
304
305 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
306 s_width = s_q_data->width;
307 s_height = s_q_data->height;
308
309 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
310 d_width = d_q_data->width;
311 d_height = d_q_data->height;
312 d_size = d_width * d_height;
313
314 p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
315 p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
316 if (!p_in || !p_out) {
317 v4l2_err(&pcdev->v4l2_dev,
318 "Acquiring kernel pointers to buffers failed\n");
319 return;
320 }
321
322
323 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
324 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
325 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
326
327
328 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
329 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
330 writel(p_out + d_size + (d_size >> 2),
331 pcdev->base_emma + PRP_DEST_CR_PTR);
332 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
333 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
334
335
336 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
337 writel(tmp | PRP_INTR_RDERR |
338 PRP_INTR_CH2WERR |
339 PRP_INTR_CH2FC,
340 pcdev->base_emma + PRP_INTR_CNTL);
341
342 emmaprp_dump_regs(pcdev);
343
344
345 tmp = readl(pcdev->base_emma + PRP_CNTL);
346 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
347 PRP_CNTL_DATA_IN_YUV422 |
348 PRP_CNTL_CH2EN,
349 pcdev->base_emma + PRP_CNTL);
350}
351
352static irqreturn_t emmaprp_irq(int irq_emma, void *data)
353{
354 struct emmaprp_dev *pcdev = data;
355 struct emmaprp_ctx *curr_ctx;
356 struct vb2_buffer *src_vb, *dst_vb;
357 unsigned long flags;
358 u32 irqst;
359
360
361 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
362 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
363 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
364
365 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
366 if (curr_ctx == NULL) {
367 pr_err("Instance released before the end of transaction\n");
368 return IRQ_HANDLED;
369 }
370
371 if (!curr_ctx->aborting) {
372 if ((irqst & PRP_INTR_ST_RDERR) ||
373 (irqst & PRP_INTR_ST_CH2WERR)) {
374 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
375 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
376 } else if (irqst & PRP_INTR_ST_CH2B1CI) {
377 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
378 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
379
380 src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp;
381 src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode;
382
383 spin_lock_irqsave(&pcdev->irqlock, flags);
384 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
385 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
386 spin_unlock_irqrestore(&pcdev->irqlock, flags);
387 }
388 }
389
390 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
391 return IRQ_HANDLED;
392}
393
394
395
396
397static int vidioc_querycap(struct file *file, void *priv,
398 struct v4l2_capability *cap)
399{
400 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
401 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
402
403
404
405
406
407 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
408 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
409 return 0;
410}
411
412static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
413{
414 int i, num;
415 struct emmaprp_fmt *fmt;
416
417 num = 0;
418
419 for (i = 0; i < NUM_FORMATS; ++i) {
420 if (formats[i].types & type) {
421
422 if (num == f->index)
423 break;
424
425
426 ++num;
427 }
428 }
429
430 if (i < NUM_FORMATS) {
431
432 fmt = &formats[i];
433 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
434 f->pixelformat = fmt->fourcc;
435 return 0;
436 }
437
438
439 return -EINVAL;
440}
441
442static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
443 struct v4l2_fmtdesc *f)
444{
445 return enum_fmt(f, MEM2MEM_CAPTURE);
446}
447
448static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
449 struct v4l2_fmtdesc *f)
450{
451 return enum_fmt(f, MEM2MEM_OUTPUT);
452}
453
454static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
455{
456 struct vb2_queue *vq;
457 struct emmaprp_q_data *q_data;
458
459 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
460 if (!vq)
461 return -EINVAL;
462
463 q_data = get_q_data(ctx, f->type);
464
465 f->fmt.pix.width = q_data->width;
466 f->fmt.pix.height = q_data->height;
467 f->fmt.pix.field = V4L2_FIELD_NONE;
468 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
469 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
470 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
471 else
472 f->fmt.pix.bytesperline = q_data->width * 2;
473 f->fmt.pix.sizeimage = q_data->sizeimage;
474
475 return 0;
476}
477
478static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
479 struct v4l2_format *f)
480{
481 return vidioc_g_fmt(priv, f);
482}
483
484static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
485 struct v4l2_format *f)
486{
487 return vidioc_g_fmt(priv, f);
488}
489
490static int vidioc_try_fmt(struct v4l2_format *f)
491{
492 enum v4l2_field field;
493
494
495 if (!find_format(f))
496 return -EINVAL;
497
498 field = f->fmt.pix.field;
499 if (field == V4L2_FIELD_ANY)
500 field = V4L2_FIELD_NONE;
501 else if (V4L2_FIELD_NONE != field)
502 return -EINVAL;
503
504
505
506 f->fmt.pix.field = field;
507
508 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
509 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
510 W_ALIGN_YUV420, &f->fmt.pix.height,
511 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
512 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
513 } else {
514 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
515 W_ALIGN_OTHERS, &f->fmt.pix.height,
516 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
517 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
518 }
519 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
520
521 return 0;
522}
523
524static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
525 struct v4l2_format *f)
526{
527 struct emmaprp_fmt *fmt;
528 struct emmaprp_ctx *ctx = priv;
529
530 fmt = find_format(f);
531 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
532 v4l2_err(&ctx->dev->v4l2_dev,
533 "Fourcc format (0x%08x) invalid.\n",
534 f->fmt.pix.pixelformat);
535 return -EINVAL;
536 }
537
538 return vidioc_try_fmt(f);
539}
540
541static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
542 struct v4l2_format *f)
543{
544 struct emmaprp_fmt *fmt;
545 struct emmaprp_ctx *ctx = priv;
546
547 fmt = find_format(f);
548 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
549 v4l2_err(&ctx->dev->v4l2_dev,
550 "Fourcc format (0x%08x) invalid.\n",
551 f->fmt.pix.pixelformat);
552 return -EINVAL;
553 }
554
555 return vidioc_try_fmt(f);
556}
557
558static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
559{
560 struct emmaprp_q_data *q_data;
561 struct vb2_queue *vq;
562 int ret;
563
564 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
565 if (!vq)
566 return -EINVAL;
567
568 q_data = get_q_data(ctx, f->type);
569 if (!q_data)
570 return -EINVAL;
571
572 if (vb2_is_busy(vq)) {
573 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
574 return -EBUSY;
575 }
576
577 ret = vidioc_try_fmt(f);
578 if (ret)
579 return ret;
580
581 q_data->fmt = find_format(f);
582 q_data->width = f->fmt.pix.width;
583 q_data->height = f->fmt.pix.height;
584 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
585 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
586 else
587 q_data->sizeimage = q_data->width * q_data->height * 2;
588
589 dprintk(ctx->dev,
590 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
591 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
592
593 return 0;
594}
595
596static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
597 struct v4l2_format *f)
598{
599 int ret;
600
601 ret = vidioc_try_fmt_vid_cap(file, priv, f);
602 if (ret)
603 return ret;
604
605 return vidioc_s_fmt(priv, f);
606}
607
608static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
609 struct v4l2_format *f)
610{
611 int ret;
612
613 ret = vidioc_try_fmt_vid_out(file, priv, f);
614 if (ret)
615 return ret;
616
617 return vidioc_s_fmt(priv, f);
618}
619
620static int vidioc_reqbufs(struct file *file, void *priv,
621 struct v4l2_requestbuffers *reqbufs)
622{
623 struct emmaprp_ctx *ctx = priv;
624
625 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
626}
627
628static int vidioc_querybuf(struct file *file, void *priv,
629 struct v4l2_buffer *buf)
630{
631 struct emmaprp_ctx *ctx = priv;
632
633 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
634}
635
636static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
637{
638 struct emmaprp_ctx *ctx = priv;
639
640 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
641}
642
643static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
644{
645 struct emmaprp_ctx *ctx = priv;
646
647 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
648}
649
650static int vidioc_streamon(struct file *file, void *priv,
651 enum v4l2_buf_type type)
652{
653 struct emmaprp_ctx *ctx = priv;
654
655 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
656}
657
658static int vidioc_streamoff(struct file *file, void *priv,
659 enum v4l2_buf_type type)
660{
661 struct emmaprp_ctx *ctx = priv;
662
663 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
664}
665
666static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
667 .vidioc_querycap = vidioc_querycap,
668
669 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
670 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
671 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
672 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
673
674 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
675 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
676 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
677 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
678
679 .vidioc_reqbufs = vidioc_reqbufs,
680 .vidioc_querybuf = vidioc_querybuf,
681
682 .vidioc_qbuf = vidioc_qbuf,
683 .vidioc_dqbuf = vidioc_dqbuf,
684
685 .vidioc_streamon = vidioc_streamon,
686 .vidioc_streamoff = vidioc_streamoff,
687};
688
689
690
691
692
693static int emmaprp_queue_setup(struct vb2_queue *vq,
694 const struct v4l2_format *fmt,
695 unsigned int *nbuffers, unsigned int *nplanes,
696 unsigned int sizes[], void *alloc_ctxs[])
697{
698 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
699 struct emmaprp_q_data *q_data;
700 unsigned int size, count = *nbuffers;
701
702 q_data = get_q_data(ctx, vq->type);
703
704 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
705 size = q_data->width * q_data->height * 3 / 2;
706 else
707 size = q_data->width * q_data->height * 2;
708
709 while (size * count > MEM2MEM_VID_MEM_LIMIT)
710 (count)--;
711
712 *nplanes = 1;
713 *nbuffers = count;
714 sizes[0] = size;
715
716 alloc_ctxs[0] = ctx->dev->alloc_ctx;
717
718 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
719
720 return 0;
721}
722
723static int emmaprp_buf_prepare(struct vb2_buffer *vb)
724{
725 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
726 struct emmaprp_q_data *q_data;
727
728 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
729
730 q_data = get_q_data(ctx, vb->vb2_queue->type);
731
732 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
733 dprintk(ctx->dev, "%s data will not fit into plane"
734 "(%lu < %lu)\n", __func__,
735 vb2_plane_size(vb, 0),
736 (long)q_data->sizeimage);
737 return -EINVAL;
738 }
739
740 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
741
742 return 0;
743}
744
745static void emmaprp_buf_queue(struct vb2_buffer *vb)
746{
747 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
748 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
749}
750
751static struct vb2_ops emmaprp_qops = {
752 .queue_setup = emmaprp_queue_setup,
753 .buf_prepare = emmaprp_buf_prepare,
754 .buf_queue = emmaprp_buf_queue,
755};
756
757static int queue_init(void *priv, struct vb2_queue *src_vq,
758 struct vb2_queue *dst_vq)
759{
760 struct emmaprp_ctx *ctx = priv;
761 int ret;
762
763 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
764 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
765 src_vq->drv_priv = ctx;
766 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
767 src_vq->ops = &emmaprp_qops;
768 src_vq->mem_ops = &vb2_dma_contig_memops;
769 src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
770
771 ret = vb2_queue_init(src_vq);
772 if (ret)
773 return ret;
774
775 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
776 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
777 dst_vq->drv_priv = ctx;
778 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
779 dst_vq->ops = &emmaprp_qops;
780 dst_vq->mem_ops = &vb2_dma_contig_memops;
781 dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
782
783 return vb2_queue_init(dst_vq);
784}
785
786
787
788
789static int emmaprp_open(struct file *file)
790{
791 struct emmaprp_dev *pcdev = video_drvdata(file);
792 struct emmaprp_ctx *ctx;
793
794 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
795 if (!ctx)
796 return -ENOMEM;
797
798 file->private_data = ctx;
799 ctx->dev = pcdev;
800
801 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
802 kfree(ctx);
803 return -ERESTARTSYS;
804 }
805
806 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
807
808 if (IS_ERR(ctx->m2m_ctx)) {
809 int ret = PTR_ERR(ctx->m2m_ctx);
810
811 mutex_unlock(&pcdev->dev_mutex);
812 kfree(ctx);
813 return ret;
814 }
815
816 clk_prepare_enable(pcdev->clk_emma_ipg);
817 clk_prepare_enable(pcdev->clk_emma_ahb);
818 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
819 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
820 mutex_unlock(&pcdev->dev_mutex);
821
822 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
823
824 return 0;
825}
826
827static int emmaprp_release(struct file *file)
828{
829 struct emmaprp_dev *pcdev = video_drvdata(file);
830 struct emmaprp_ctx *ctx = file->private_data;
831
832 dprintk(pcdev, "Releasing instance %p\n", ctx);
833
834 mutex_lock(&pcdev->dev_mutex);
835 clk_disable_unprepare(pcdev->clk_emma_ahb);
836 clk_disable_unprepare(pcdev->clk_emma_ipg);
837 v4l2_m2m_ctx_release(ctx->m2m_ctx);
838 mutex_unlock(&pcdev->dev_mutex);
839 kfree(ctx);
840
841 return 0;
842}
843
844static unsigned int emmaprp_poll(struct file *file,
845 struct poll_table_struct *wait)
846{
847 struct emmaprp_dev *pcdev = video_drvdata(file);
848 struct emmaprp_ctx *ctx = file->private_data;
849 unsigned int res;
850
851 mutex_lock(&pcdev->dev_mutex);
852 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
853 mutex_unlock(&pcdev->dev_mutex);
854 return res;
855}
856
857static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
858{
859 struct emmaprp_dev *pcdev = video_drvdata(file);
860 struct emmaprp_ctx *ctx = file->private_data;
861 int ret;
862
863 if (mutex_lock_interruptible(&pcdev->dev_mutex))
864 return -ERESTARTSYS;
865 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
866 mutex_unlock(&pcdev->dev_mutex);
867 return ret;
868}
869
870static const struct v4l2_file_operations emmaprp_fops = {
871 .owner = THIS_MODULE,
872 .open = emmaprp_open,
873 .release = emmaprp_release,
874 .poll = emmaprp_poll,
875 .unlocked_ioctl = video_ioctl2,
876 .mmap = emmaprp_mmap,
877};
878
879static struct video_device emmaprp_videodev = {
880 .name = MEM2MEM_NAME,
881 .fops = &emmaprp_fops,
882 .ioctl_ops = &emmaprp_ioctl_ops,
883 .minor = -1,
884 .release = video_device_release,
885 .vfl_dir = VFL_DIR_M2M,
886};
887
888static struct v4l2_m2m_ops m2m_ops = {
889 .device_run = emmaprp_device_run,
890 .job_abort = emmaprp_job_abort,
891 .lock = emmaprp_lock,
892 .unlock = emmaprp_unlock,
893};
894
895static int emmaprp_probe(struct platform_device *pdev)
896{
897 struct emmaprp_dev *pcdev;
898 struct video_device *vfd;
899 struct resource *res_emma;
900 int irq_emma;
901 int ret;
902
903 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
904 if (!pcdev)
905 return -ENOMEM;
906
907 spin_lock_init(&pcdev->irqlock);
908
909 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
910 if (IS_ERR(pcdev->clk_emma_ipg)) {
911 return PTR_ERR(pcdev->clk_emma_ipg);
912 }
913
914 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
915 if (IS_ERR(pcdev->clk_emma_ahb))
916 return PTR_ERR(pcdev->clk_emma_ahb);
917
918 irq_emma = platform_get_irq(pdev, 0);
919 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
920 if (irq_emma < 0 || res_emma == NULL) {
921 dev_err(&pdev->dev, "Missing platform resources data\n");
922 return -ENODEV;
923 }
924
925 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
926 if (ret)
927 return ret;
928
929 mutex_init(&pcdev->dev_mutex);
930
931 vfd = video_device_alloc();
932 if (!vfd) {
933 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
934 ret = -ENOMEM;
935 goto unreg_dev;
936 }
937
938 *vfd = emmaprp_videodev;
939 vfd->lock = &pcdev->dev_mutex;
940
941 video_set_drvdata(vfd, pcdev);
942 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
943 pcdev->vfd = vfd;
944 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
945 " Device registered as /dev/video%d\n", vfd->num);
946
947 platform_set_drvdata(pdev, pcdev);
948
949 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res_emma);
950 if (IS_ERR(pcdev->base_emma)) {
951 ret = PTR_ERR(pcdev->base_emma);
952 goto rel_vdev;
953 }
954
955 pcdev->irq_emma = irq_emma;
956 pcdev->res_emma = res_emma;
957
958 if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq,
959 0, MEM2MEM_NAME, pcdev) < 0) {
960 ret = -ENODEV;
961 goto rel_vdev;
962 }
963
964 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
965 if (IS_ERR(pcdev->alloc_ctx)) {
966 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
967 ret = PTR_ERR(pcdev->alloc_ctx);
968 goto rel_vdev;
969 }
970
971 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
972 if (IS_ERR(pcdev->m2m_dev)) {
973 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
974 ret = PTR_ERR(pcdev->m2m_dev);
975 goto rel_ctx;
976 }
977
978 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
979 if (ret) {
980 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
981 goto rel_m2m;
982 }
983
984 return 0;
985
986
987rel_m2m:
988 v4l2_m2m_release(pcdev->m2m_dev);
989rel_ctx:
990 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
991rel_vdev:
992 video_device_release(vfd);
993unreg_dev:
994 v4l2_device_unregister(&pcdev->v4l2_dev);
995
996 return ret;
997}
998
999static int emmaprp_remove(struct platform_device *pdev)
1000{
1001 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
1002
1003 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
1004
1005 video_unregister_device(pcdev->vfd);
1006 v4l2_m2m_release(pcdev->m2m_dev);
1007 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1008 v4l2_device_unregister(&pcdev->v4l2_dev);
1009
1010 return 0;
1011}
1012
1013static struct platform_driver emmaprp_pdrv = {
1014 .probe = emmaprp_probe,
1015 .remove = emmaprp_remove,
1016 .driver = {
1017 .name = MEM2MEM_NAME,
1018 .owner = THIS_MODULE,
1019 },
1020};
1021module_platform_driver(emmaprp_pdrv);
1022
