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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 <linux/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 void __iomem *base_emma;
211 struct clk *clk_emma_ahb, *clk_emma_ipg;
212
213 struct v4l2_m2m_dev *m2m_dev;
214};
215
216struct emmaprp_ctx {
217 struct emmaprp_dev *dev;
218
219 int aborting;
220 struct emmaprp_q_data q_data[2];
221 struct v4l2_m2m_ctx *m2m_ctx;
222};
223
224static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
225 enum v4l2_buf_type type)
226{
227 switch (type) {
228 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
229 return &(ctx->q_data[V4L2_M2M_SRC]);
230 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
231 return &(ctx->q_data[V4L2_M2M_DST]);
232 default:
233 BUG();
234 }
235 return NULL;
236}
237
238
239
240
241static void emmaprp_job_abort(void *priv)
242{
243 struct emmaprp_ctx *ctx = priv;
244 struct emmaprp_dev *pcdev = ctx->dev;
245
246 ctx->aborting = 1;
247
248 dprintk(pcdev, "Aborting task\n");
249
250 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
251}
252
253static void emmaprp_lock(void *priv)
254{
255 struct emmaprp_ctx *ctx = priv;
256 struct emmaprp_dev *pcdev = ctx->dev;
257 mutex_lock(&pcdev->dev_mutex);
258}
259
260static void emmaprp_unlock(void *priv)
261{
262 struct emmaprp_ctx *ctx = priv;
263 struct emmaprp_dev *pcdev = ctx->dev;
264 mutex_unlock(&pcdev->dev_mutex);
265}
266
267static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
268{
269 dprintk(pcdev,
270 "eMMa-PrP Registers:\n"
271 " SOURCE_Y_PTR = 0x%08X\n"
272 " SRC_FRAME_SIZE = 0x%08X\n"
273 " DEST_Y_PTR = 0x%08X\n"
274 " DEST_CR_PTR = 0x%08X\n"
275 " DEST_CB_PTR = 0x%08X\n"
276 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
277 " CNTL = 0x%08X\n",
278 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
279 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
280 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
281 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
282 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
283 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
284 readl(pcdev->base_emma + PRP_CNTL));
285}
286
287static void emmaprp_device_run(void *priv)
288{
289 struct emmaprp_ctx *ctx = priv;
290 struct emmaprp_q_data *s_q_data, *d_q_data;
291 struct vb2_buffer *src_buf, *dst_buf;
292 struct emmaprp_dev *pcdev = ctx->dev;
293 unsigned int s_width, s_height;
294 unsigned int d_width, d_height;
295 unsigned int d_size;
296 dma_addr_t p_in, p_out;
297 u32 tmp;
298
299 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
300 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
301
302 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
303 s_width = s_q_data->width;
304 s_height = s_q_data->height;
305
306 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
307 d_width = d_q_data->width;
308 d_height = d_q_data->height;
309 d_size = d_width * d_height;
310
311 p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
312 p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
313 if (!p_in || !p_out) {
314 v4l2_err(&pcdev->v4l2_dev,
315 "Acquiring kernel pointers to buffers failed\n");
316 return;
317 }
318
319
320 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
321 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
322 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
323
324
325 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
326 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
327 writel(p_out + d_size + (d_size >> 2),
328 pcdev->base_emma + PRP_DEST_CR_PTR);
329 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
330 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
331
332
333 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
334 writel(tmp | PRP_INTR_RDERR |
335 PRP_INTR_CH2WERR |
336 PRP_INTR_CH2FC,
337 pcdev->base_emma + PRP_INTR_CNTL);
338
339 emmaprp_dump_regs(pcdev);
340
341
342 tmp = readl(pcdev->base_emma + PRP_CNTL);
343 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
344 PRP_CNTL_DATA_IN_YUV422 |
345 PRP_CNTL_CH2EN,
346 pcdev->base_emma + PRP_CNTL);
347}
348
349static irqreturn_t emmaprp_irq(int irq_emma, void *data)
350{
351 struct emmaprp_dev *pcdev = data;
352 struct emmaprp_ctx *curr_ctx;
353 struct vb2_v4l2_buffer *src_vb, *dst_vb;
354 unsigned long flags;
355 u32 irqst;
356
357
358 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
359 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
360 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
361
362 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
363 if (curr_ctx == NULL) {
364 pr_err("Instance released before the end of transaction\n");
365 return IRQ_HANDLED;
366 }
367
368 if (!curr_ctx->aborting) {
369 if ((irqst & PRP_INTR_ST_RDERR) ||
370 (irqst & PRP_INTR_ST_CH2WERR)) {
371 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
372 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
373 } else if (irqst & PRP_INTR_ST_CH2B1CI) {
374 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
375 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
376
377 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
378 dst_vb->flags &=
379 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
380 dst_vb->flags |=
381 src_vb->flags
382 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
383 dst_vb->timecode = src_vb->timecode;
384
385 spin_lock_irqsave(&pcdev->irqlock, flags);
386 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
387 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
388 spin_unlock_irqrestore(&pcdev->irqlock, flags);
389 }
390 }
391
392 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
393 return IRQ_HANDLED;
394}
395
396
397
398
399static int vidioc_querycap(struct file *file, void *priv,
400 struct v4l2_capability *cap)
401{
402 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
403 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
404 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
405 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
406 return 0;
407}
408
409static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
410{
411 int i, num;
412 struct emmaprp_fmt *fmt;
413
414 num = 0;
415
416 for (i = 0; i < NUM_FORMATS; ++i) {
417 if (formats[i].types & type) {
418
419 if (num == f->index)
420 break;
421
422
423 ++num;
424 }
425 }
426
427 if (i < NUM_FORMATS) {
428
429 fmt = &formats[i];
430 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
431 f->pixelformat = fmt->fourcc;
432 return 0;
433 }
434
435
436 return -EINVAL;
437}
438
439static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
440 struct v4l2_fmtdesc *f)
441{
442 return enum_fmt(f, MEM2MEM_CAPTURE);
443}
444
445static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
446 struct v4l2_fmtdesc *f)
447{
448 return enum_fmt(f, MEM2MEM_OUTPUT);
449}
450
451static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
452{
453 struct vb2_queue *vq;
454 struct emmaprp_q_data *q_data;
455
456 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
457 if (!vq)
458 return -EINVAL;
459
460 q_data = get_q_data(ctx, f->type);
461
462 f->fmt.pix.width = q_data->width;
463 f->fmt.pix.height = q_data->height;
464 f->fmt.pix.field = V4L2_FIELD_NONE;
465 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
466 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
467 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
468 else
469 f->fmt.pix.bytesperline = q_data->width * 2;
470 f->fmt.pix.sizeimage = q_data->sizeimage;
471
472 return 0;
473}
474
475static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
476 struct v4l2_format *f)
477{
478 return vidioc_g_fmt(priv, f);
479}
480
481static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
482 struct v4l2_format *f)
483{
484 return vidioc_g_fmt(priv, f);
485}
486
487static int vidioc_try_fmt(struct v4l2_format *f)
488{
489 enum v4l2_field field;
490
491
492 if (!find_format(f))
493 return -EINVAL;
494
495 field = f->fmt.pix.field;
496 if (field == V4L2_FIELD_ANY)
497 field = V4L2_FIELD_NONE;
498 else if (V4L2_FIELD_NONE != field)
499 return -EINVAL;
500
501
502
503 f->fmt.pix.field = field;
504
505 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
506 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
507 W_ALIGN_YUV420, &f->fmt.pix.height,
508 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
509 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
510 } else {
511 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
512 W_ALIGN_OTHERS, &f->fmt.pix.height,
513 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
514 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
515 }
516 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
517
518 return 0;
519}
520
521static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
522 struct v4l2_format *f)
523{
524 struct emmaprp_fmt *fmt;
525 struct emmaprp_ctx *ctx = priv;
526
527 fmt = find_format(f);
528 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
529 v4l2_err(&ctx->dev->v4l2_dev,
530 "Fourcc format (0x%08x) invalid.\n",
531 f->fmt.pix.pixelformat);
532 return -EINVAL;
533 }
534
535 return vidioc_try_fmt(f);
536}
537
538static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
539 struct v4l2_format *f)
540{
541 struct emmaprp_fmt *fmt;
542 struct emmaprp_ctx *ctx = priv;
543
544 fmt = find_format(f);
545 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
546 v4l2_err(&ctx->dev->v4l2_dev,
547 "Fourcc format (0x%08x) invalid.\n",
548 f->fmt.pix.pixelformat);
549 return -EINVAL;
550 }
551
552 return vidioc_try_fmt(f);
553}
554
555static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
556{
557 struct emmaprp_q_data *q_data;
558 struct vb2_queue *vq;
559 int ret;
560
561 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
562 if (!vq)
563 return -EINVAL;
564
565 q_data = get_q_data(ctx, f->type);
566 if (!q_data)
567 return -EINVAL;
568
569 if (vb2_is_busy(vq)) {
570 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
571 return -EBUSY;
572 }
573
574 ret = vidioc_try_fmt(f);
575 if (ret)
576 return ret;
577
578 q_data->fmt = find_format(f);
579 q_data->width = f->fmt.pix.width;
580 q_data->height = f->fmt.pix.height;
581 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
582 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
583 else
584 q_data->sizeimage = q_data->width * q_data->height * 2;
585
586 dprintk(ctx->dev,
587 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
588 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
589
590 return 0;
591}
592
593static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
594 struct v4l2_format *f)
595{
596 int ret;
597
598 ret = vidioc_try_fmt_vid_cap(file, priv, f);
599 if (ret)
600 return ret;
601
602 return vidioc_s_fmt(priv, f);
603}
604
605static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
606 struct v4l2_format *f)
607{
608 int ret;
609
610 ret = vidioc_try_fmt_vid_out(file, priv, f);
611 if (ret)
612 return ret;
613
614 return vidioc_s_fmt(priv, f);
615}
616
617static int vidioc_reqbufs(struct file *file, void *priv,
618 struct v4l2_requestbuffers *reqbufs)
619{
620 struct emmaprp_ctx *ctx = priv;
621
622 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
623}
624
625static int vidioc_querybuf(struct file *file, void *priv,
626 struct v4l2_buffer *buf)
627{
628 struct emmaprp_ctx *ctx = priv;
629
630 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
631}
632
633static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
634{
635 struct emmaprp_ctx *ctx = priv;
636
637 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
638}
639
640static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
641{
642 struct emmaprp_ctx *ctx = priv;
643
644 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
645}
646
647static int vidioc_streamon(struct file *file, void *priv,
648 enum v4l2_buf_type type)
649{
650 struct emmaprp_ctx *ctx = priv;
651
652 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
653}
654
655static int vidioc_streamoff(struct file *file, void *priv,
656 enum v4l2_buf_type type)
657{
658 struct emmaprp_ctx *ctx = priv;
659
660 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
661}
662
663static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
664 .vidioc_querycap = vidioc_querycap,
665
666 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
667 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
668 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
669 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
670
671 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
672 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
673 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
674 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
675
676 .vidioc_reqbufs = vidioc_reqbufs,
677 .vidioc_querybuf = vidioc_querybuf,
678
679 .vidioc_qbuf = vidioc_qbuf,
680 .vidioc_dqbuf = vidioc_dqbuf,
681
682 .vidioc_streamon = vidioc_streamon,
683 .vidioc_streamoff = vidioc_streamoff,
684};
685
686
687
688
689
690static int emmaprp_queue_setup(struct vb2_queue *vq,
691 unsigned int *nbuffers, unsigned int *nplanes,
692 unsigned int sizes[], struct device *alloc_devs[])
693{
694 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
695 struct emmaprp_q_data *q_data;
696 unsigned int size, count = *nbuffers;
697
698 q_data = get_q_data(ctx, vq->type);
699
700 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
701 size = q_data->width * q_data->height * 3 / 2;
702 else
703 size = q_data->width * q_data->height * 2;
704
705 while (size * count > MEM2MEM_VID_MEM_LIMIT)
706 (count)--;
707
708 *nplanes = 1;
709 *nbuffers = count;
710 sizes[0] = size;
711
712 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
713
714 return 0;
715}
716
717static int emmaprp_buf_prepare(struct vb2_buffer *vb)
718{
719 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
720 struct emmaprp_q_data *q_data;
721
722 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
723
724 q_data = get_q_data(ctx, vb->vb2_queue->type);
725
726 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
727 dprintk(ctx->dev, "%s data will not fit into plane"
728 "(%lu < %lu)\n", __func__,
729 vb2_plane_size(vb, 0),
730 (long)q_data->sizeimage);
731 return -EINVAL;
732 }
733
734 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
735
736 return 0;
737}
738
739static void emmaprp_buf_queue(struct vb2_buffer *vb)
740{
741 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
742 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
743 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
744}
745
746static const struct vb2_ops emmaprp_qops = {
747 .queue_setup = emmaprp_queue_setup,
748 .buf_prepare = emmaprp_buf_prepare,
749 .buf_queue = emmaprp_buf_queue,
750};
751
752static int queue_init(void *priv, struct vb2_queue *src_vq,
753 struct vb2_queue *dst_vq)
754{
755 struct emmaprp_ctx *ctx = priv;
756 int ret;
757
758 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
759 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
760 src_vq->drv_priv = ctx;
761 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
762 src_vq->ops = &emmaprp_qops;
763 src_vq->mem_ops = &vb2_dma_contig_memops;
764 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
765 src_vq->dev = ctx->dev->v4l2_dev.dev;
766
767 ret = vb2_queue_init(src_vq);
768 if (ret)
769 return ret;
770
771 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
772 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
773 dst_vq->drv_priv = ctx;
774 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
775 dst_vq->ops = &emmaprp_qops;
776 dst_vq->mem_ops = &vb2_dma_contig_memops;
777 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
778 dst_vq->dev = ctx->dev->v4l2_dev.dev;
779
780 return vb2_queue_init(dst_vq);
781}
782
783
784
785
786static int emmaprp_open(struct file *file)
787{
788 struct emmaprp_dev *pcdev = video_drvdata(file);
789 struct emmaprp_ctx *ctx;
790
791 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
792 if (!ctx)
793 return -ENOMEM;
794
795 file->private_data = ctx;
796 ctx->dev = pcdev;
797
798 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
799 kfree(ctx);
800 return -ERESTARTSYS;
801 }
802
803 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
804
805 if (IS_ERR(ctx->m2m_ctx)) {
806 int ret = PTR_ERR(ctx->m2m_ctx);
807
808 mutex_unlock(&pcdev->dev_mutex);
809 kfree(ctx);
810 return ret;
811 }
812
813 clk_prepare_enable(pcdev->clk_emma_ipg);
814 clk_prepare_enable(pcdev->clk_emma_ahb);
815 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
816 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
817 mutex_unlock(&pcdev->dev_mutex);
818
819 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
820
821 return 0;
822}
823
824static int emmaprp_release(struct file *file)
825{
826 struct emmaprp_dev *pcdev = video_drvdata(file);
827 struct emmaprp_ctx *ctx = file->private_data;
828
829 dprintk(pcdev, "Releasing instance %p\n", ctx);
830
831 mutex_lock(&pcdev->dev_mutex);
832 clk_disable_unprepare(pcdev->clk_emma_ahb);
833 clk_disable_unprepare(pcdev->clk_emma_ipg);
834 v4l2_m2m_ctx_release(ctx->m2m_ctx);
835 mutex_unlock(&pcdev->dev_mutex);
836 kfree(ctx);
837
838 return 0;
839}
840
841static unsigned int emmaprp_poll(struct file *file,
842 struct poll_table_struct *wait)
843{
844 struct emmaprp_dev *pcdev = video_drvdata(file);
845 struct emmaprp_ctx *ctx = file->private_data;
846 unsigned int res;
847
848 mutex_lock(&pcdev->dev_mutex);
849 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
850 mutex_unlock(&pcdev->dev_mutex);
851 return res;
852}
853
854static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
855{
856 struct emmaprp_dev *pcdev = video_drvdata(file);
857 struct emmaprp_ctx *ctx = file->private_data;
858 int ret;
859
860 if (mutex_lock_interruptible(&pcdev->dev_mutex))
861 return -ERESTARTSYS;
862 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
863 mutex_unlock(&pcdev->dev_mutex);
864 return ret;
865}
866
867static const struct v4l2_file_operations emmaprp_fops = {
868 .owner = THIS_MODULE,
869 .open = emmaprp_open,
870 .release = emmaprp_release,
871 .poll = emmaprp_poll,
872 .unlocked_ioctl = video_ioctl2,
873 .mmap = emmaprp_mmap,
874};
875
876static struct video_device emmaprp_videodev = {
877 .name = MEM2MEM_NAME,
878 .fops = &emmaprp_fops,
879 .ioctl_ops = &emmaprp_ioctl_ops,
880 .minor = -1,
881 .release = video_device_release,
882 .vfl_dir = VFL_DIR_M2M,
883};
884
885static struct v4l2_m2m_ops m2m_ops = {
886 .device_run = emmaprp_device_run,
887 .job_abort = emmaprp_job_abort,
888 .lock = emmaprp_lock,
889 .unlock = emmaprp_unlock,
890};
891
892static int emmaprp_probe(struct platform_device *pdev)
893{
894 struct emmaprp_dev *pcdev;
895 struct video_device *vfd;
896 struct resource *res;
897 int irq, ret;
898
899 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
900 if (!pcdev)
901 return -ENOMEM;
902
903 spin_lock_init(&pcdev->irqlock);
904
905 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
906 if (IS_ERR(pcdev->clk_emma_ipg)) {
907 return PTR_ERR(pcdev->clk_emma_ipg);
908 }
909
910 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
911 if (IS_ERR(pcdev->clk_emma_ahb))
912 return PTR_ERR(pcdev->clk_emma_ahb);
913
914 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
915 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
916 if (IS_ERR(pcdev->base_emma))
917 return PTR_ERR(pcdev->base_emma);
918
919 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
920 if (ret)
921 return ret;
922
923 mutex_init(&pcdev->dev_mutex);
924
925 vfd = video_device_alloc();
926 if (!vfd) {
927 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
928 ret = -ENOMEM;
929 goto unreg_dev;
930 }
931
932 *vfd = emmaprp_videodev;
933 vfd->lock = &pcdev->dev_mutex;
934 vfd->v4l2_dev = &pcdev->v4l2_dev;
935
936 video_set_drvdata(vfd, pcdev);
937 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
938 pcdev->vfd = vfd;
939 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
940 " Device registered as /dev/video%d\n", vfd->num);
941
942 platform_set_drvdata(pdev, pcdev);
943
944 irq = platform_get_irq(pdev, 0);
945 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
946 dev_name(&pdev->dev), pcdev);
947 if (ret)
948 goto rel_vdev;
949
950 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
951 if (IS_ERR(pcdev->m2m_dev)) {
952 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
953 ret = PTR_ERR(pcdev->m2m_dev);
954 goto rel_vdev;
955 }
956
957 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
958 if (ret) {
959 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
960 goto rel_m2m;
961 }
962
963 return 0;
964
965
966rel_m2m:
967 v4l2_m2m_release(pcdev->m2m_dev);
968rel_vdev:
969 video_device_release(vfd);
970unreg_dev:
971 v4l2_device_unregister(&pcdev->v4l2_dev);
972
973 mutex_destroy(&pcdev->dev_mutex);
974
975 return ret;
976}
977
978static int emmaprp_remove(struct platform_device *pdev)
979{
980 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
981
982 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
983
984 video_unregister_device(pcdev->vfd);
985 v4l2_m2m_release(pcdev->m2m_dev);
986 v4l2_device_unregister(&pcdev->v4l2_dev);
987 mutex_destroy(&pcdev->dev_mutex);
988
989 return 0;
990}
991
992static struct platform_driver emmaprp_pdrv = {
993 .probe = emmaprp_probe,
994 .remove = emmaprp_remove,
995 .driver = {
996 .name = MEM2MEM_NAME,
997 },
998};
999module_platform_driver(emmaprp_pdrv);
1000
