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Merge branch 'pm-acpi' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
[deliverable/linux.git] / drivers / media / video / mx2_emmaprp.c
1 /*
2 * Support eMMa-PrP through mem2mem framework.
3 *
4 * eMMa-PrP is a piece of HW that allows fetching buffers
5 * from one memory location and do several operations on
6 * them such as scaling or format conversion giving, as a result
7 * a new processed buffer in another memory location.
8 *
9 * Based on mem2mem_testdev.c by Pawel Osciak.
10 *
11 * Copyright (c) 2011 Vista Silicon S.L.
12 * Javier Martin <javier.martin@vista-silicon.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/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
34 MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
35 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.0.1");
38
39 static bool debug;
40 module_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 /* multiple of 2 */
48 #define W_ALIGN_YUV420 3 /* multiple of 8 */
49 #define W_ALIGN_OTHERS 2 /* multiple of 4 */
50 #define H_ALIGN 1 /* multiple of 2 */
51
52 /* Flags that indicate a format can be used for capture/output */
53 #define MEM2MEM_CAPTURE (1 << 0)
54 #define MEM2MEM_OUTPUT (1 << 1)
55
56 #define MEM2MEM_NAME "m2m-emmaprp"
57
58 /* In bytes, per queue */
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 /* EMMA PrP */
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 /* IRQ Enable and status register */
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
151 struct emmaprp_fmt {
152 char *name;
153 u32 fourcc;
154 /* Types the format can be used for */
155 u32 types;
156 };
157
158 static 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 /* Per-queue, driver-specific private data */
172 struct emmaprp_q_data {
173 unsigned int width;
174 unsigned int height;
175 unsigned int sizeimage;
176 struct emmaprp_fmt *fmt;
177 };
178
179 enum {
180 V4L2_M2M_SRC = 0,
181 V4L2_M2M_DST = 1,
182 };
183
184 #define NUM_FORMATS ARRAY_SIZE(formats)
185
186 static 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
203 struct 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;
213 struct resource *res_emma;
214
215 struct v4l2_m2m_dev *m2m_dev;
216 struct vb2_alloc_ctx *alloc_ctx;
217 };
218
219 struct emmaprp_ctx {
220 struct emmaprp_dev *dev;
221 /* Abort requested by m2m */
222 int aborting;
223 struct emmaprp_q_data q_data[2];
224 struct v4l2_m2m_ctx *m2m_ctx;
225 };
226
227 static 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 * mem2mem callbacks
243 */
244 static 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
256 static 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
263 static 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
270 static 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
290 static 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 /* Input frame parameters */
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 /* Output frame parameters */
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 /* IRQ configuration */
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 /* Enable transfer */
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
352 static 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 /* Check irq flags and clear irq */
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 ocurred, this transfer is probably corrupted\n");
375 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
376 } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
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 spin_lock_irqsave(&pcdev->irqlock, flags);
381 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
382 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
383 spin_unlock_irqrestore(&pcdev->irqlock, flags);
384 }
385 }
386
387 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
388 return IRQ_HANDLED;
389 }
390
391 /*
392 * video ioctls
393 */
394 static int vidioc_querycap(struct file *file, void *priv,
395 struct v4l2_capability *cap)
396 {
397 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
398 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
399 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
400 | V4L2_CAP_STREAMING;
401
402 return 0;
403 }
404
405 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
406 {
407 int i, num;
408 struct emmaprp_fmt *fmt;
409
410 num = 0;
411
412 for (i = 0; i < NUM_FORMATS; ++i) {
413 if (formats[i].types & type) {
414 /* index-th format of type type found ? */
415 if (num == f->index)
416 break;
417 /* Correct type but haven't reached our index yet,
418 * just increment per-type index */
419 ++num;
420 }
421 }
422
423 if (i < NUM_FORMATS) {
424 /* Format found */
425 fmt = &formats[i];
426 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
427 f->pixelformat = fmt->fourcc;
428 return 0;
429 }
430
431 /* Format not found */
432 return -EINVAL;
433 }
434
435 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
436 struct v4l2_fmtdesc *f)
437 {
438 return enum_fmt(f, MEM2MEM_CAPTURE);
439 }
440
441 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
442 struct v4l2_fmtdesc *f)
443 {
444 return enum_fmt(f, MEM2MEM_OUTPUT);
445 }
446
447 static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
448 {
449 struct vb2_queue *vq;
450 struct emmaprp_q_data *q_data;
451
452 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
453 if (!vq)
454 return -EINVAL;
455
456 q_data = get_q_data(ctx, f->type);
457
458 f->fmt.pix.width = q_data->width;
459 f->fmt.pix.height = q_data->height;
460 f->fmt.pix.field = V4L2_FIELD_NONE;
461 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
462 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
463 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
464 else /* YUYV */
465 f->fmt.pix.bytesperline = q_data->width * 2;
466 f->fmt.pix.sizeimage = q_data->sizeimage;
467
468 return 0;
469 }
470
471 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
472 struct v4l2_format *f)
473 {
474 return vidioc_g_fmt(priv, f);
475 }
476
477 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
478 struct v4l2_format *f)
479 {
480 return vidioc_g_fmt(priv, f);
481 }
482
483 static int vidioc_try_fmt(struct v4l2_format *f)
484 {
485 enum v4l2_field field;
486
487
488 if (!find_format(f))
489 return -EINVAL;
490
491 field = f->fmt.pix.field;
492 if (field == V4L2_FIELD_ANY)
493 field = V4L2_FIELD_NONE;
494 else if (V4L2_FIELD_NONE != field)
495 return -EINVAL;
496
497 /* V4L2 specification suggests the driver corrects the format struct
498 * if any of the dimensions is unsupported */
499 f->fmt.pix.field = field;
500
501 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
502 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
503 W_ALIGN_YUV420, &f->fmt.pix.height,
504 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
505 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
506 } else {
507 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
508 W_ALIGN_OTHERS, &f->fmt.pix.height,
509 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
510 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
511 }
512 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
513
514 return 0;
515 }
516
517 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
518 struct v4l2_format *f)
519 {
520 struct emmaprp_fmt *fmt;
521 struct emmaprp_ctx *ctx = priv;
522
523 fmt = find_format(f);
524 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
525 v4l2_err(&ctx->dev->v4l2_dev,
526 "Fourcc format (0x%08x) invalid.\n",
527 f->fmt.pix.pixelformat);
528 return -EINVAL;
529 }
530
531 return vidioc_try_fmt(f);
532 }
533
534 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
535 struct v4l2_format *f)
536 {
537 struct emmaprp_fmt *fmt;
538 struct emmaprp_ctx *ctx = priv;
539
540 fmt = find_format(f);
541 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
542 v4l2_err(&ctx->dev->v4l2_dev,
543 "Fourcc format (0x%08x) invalid.\n",
544 f->fmt.pix.pixelformat);
545 return -EINVAL;
546 }
547
548 return vidioc_try_fmt(f);
549 }
550
551 static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
552 {
553 struct emmaprp_q_data *q_data;
554 struct vb2_queue *vq;
555 int ret;
556
557 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
558 if (!vq)
559 return -EINVAL;
560
561 q_data = get_q_data(ctx, f->type);
562 if (!q_data)
563 return -EINVAL;
564
565 if (vb2_is_busy(vq)) {
566 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
567 return -EBUSY;
568 }
569
570 ret = vidioc_try_fmt(f);
571 if (ret)
572 return ret;
573
574 q_data->fmt = find_format(f);
575 q_data->width = f->fmt.pix.width;
576 q_data->height = f->fmt.pix.height;
577 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
578 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
579 else /* YUYV */
580 q_data->sizeimage = q_data->width * q_data->height * 2;
581
582 dprintk(ctx->dev,
583 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
584 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
585
586 return 0;
587 }
588
589 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
590 struct v4l2_format *f)
591 {
592 int ret;
593
594 ret = vidioc_try_fmt_vid_cap(file, priv, f);
595 if (ret)
596 return ret;
597
598 return vidioc_s_fmt(priv, f);
599 }
600
601 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
602 struct v4l2_format *f)
603 {
604 int ret;
605
606 ret = vidioc_try_fmt_vid_out(file, priv, f);
607 if (ret)
608 return ret;
609
610 return vidioc_s_fmt(priv, f);
611 }
612
613 static int vidioc_reqbufs(struct file *file, void *priv,
614 struct v4l2_requestbuffers *reqbufs)
615 {
616 struct emmaprp_ctx *ctx = priv;
617
618 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
619 }
620
621 static int vidioc_querybuf(struct file *file, void *priv,
622 struct v4l2_buffer *buf)
623 {
624 struct emmaprp_ctx *ctx = priv;
625
626 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
627 }
628
629 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
630 {
631 struct emmaprp_ctx *ctx = priv;
632
633 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
634 }
635
636 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
637 {
638 struct emmaprp_ctx *ctx = priv;
639
640 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
641 }
642
643 static int vidioc_streamon(struct file *file, void *priv,
644 enum v4l2_buf_type type)
645 {
646 struct emmaprp_ctx *ctx = priv;
647
648 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
649 }
650
651 static int vidioc_streamoff(struct file *file, void *priv,
652 enum v4l2_buf_type type)
653 {
654 struct emmaprp_ctx *ctx = priv;
655
656 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
657 }
658
659 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
660 .vidioc_querycap = vidioc_querycap,
661
662 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
663 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
664 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
665 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
666
667 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
668 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
669 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
670 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
671
672 .vidioc_reqbufs = vidioc_reqbufs,
673 .vidioc_querybuf = vidioc_querybuf,
674
675 .vidioc_qbuf = vidioc_qbuf,
676 .vidioc_dqbuf = vidioc_dqbuf,
677
678 .vidioc_streamon = vidioc_streamon,
679 .vidioc_streamoff = vidioc_streamoff,
680 };
681
682
683 /*
684 * Queue operations
685 */
686 static int emmaprp_queue_setup(struct vb2_queue *vq,
687 const struct v4l2_format *fmt,
688 unsigned int *nbuffers, unsigned int *nplanes,
689 unsigned int sizes[], void *alloc_ctxs[])
690 {
691 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
692 struct emmaprp_q_data *q_data;
693 unsigned int size, count = *nbuffers;
694
695 q_data = get_q_data(ctx, vq->type);
696
697 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
698 size = q_data->width * q_data->height * 3 / 2;
699 else
700 size = q_data->width * q_data->height * 2;
701
702 while (size * count > MEM2MEM_VID_MEM_LIMIT)
703 (count)--;
704
705 *nplanes = 1;
706 *nbuffers = count;
707 sizes[0] = size;
708
709 alloc_ctxs[0] = ctx->dev->alloc_ctx;
710
711 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
712
713 return 0;
714 }
715
716 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
717 {
718 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
719 struct emmaprp_q_data *q_data;
720
721 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
722
723 q_data = get_q_data(ctx, vb->vb2_queue->type);
724
725 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
726 dprintk(ctx->dev, "%s data will not fit into plane"
727 "(%lu < %lu)\n", __func__,
728 vb2_plane_size(vb, 0),
729 (long)q_data->sizeimage);
730 return -EINVAL;
731 }
732
733 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
734
735 return 0;
736 }
737
738 static void emmaprp_buf_queue(struct vb2_buffer *vb)
739 {
740 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
741 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
742 }
743
744 static struct vb2_ops emmaprp_qops = {
745 .queue_setup = emmaprp_queue_setup,
746 .buf_prepare = emmaprp_buf_prepare,
747 .buf_queue = emmaprp_buf_queue,
748 };
749
750 static int queue_init(void *priv, struct vb2_queue *src_vq,
751 struct vb2_queue *dst_vq)
752 {
753 struct emmaprp_ctx *ctx = priv;
754 int ret;
755
756 memset(src_vq, 0, sizeof(*src_vq));
757 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
758 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
759 src_vq->drv_priv = ctx;
760 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
761 src_vq->ops = &emmaprp_qops;
762 src_vq->mem_ops = &vb2_dma_contig_memops;
763
764 ret = vb2_queue_init(src_vq);
765 if (ret)
766 return ret;
767
768 memset(dst_vq, 0, sizeof(*dst_vq));
769 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
770 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
771 dst_vq->drv_priv = ctx;
772 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
773 dst_vq->ops = &emmaprp_qops;
774 dst_vq->mem_ops = &vb2_dma_contig_memops;
775
776 return vb2_queue_init(dst_vq);
777 }
778
779 /*
780 * File operations
781 */
782 static int emmaprp_open(struct file *file)
783 {
784 struct emmaprp_dev *pcdev = video_drvdata(file);
785 struct emmaprp_ctx *ctx;
786
787 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
788 if (!ctx)
789 return -ENOMEM;
790
791 file->private_data = ctx;
792 ctx->dev = pcdev;
793
794 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
795
796 if (IS_ERR(ctx->m2m_ctx)) {
797 int ret = PTR_ERR(ctx->m2m_ctx);
798
799 kfree(ctx);
800 return ret;
801 }
802
803 clk_enable(pcdev->clk_emma);
804 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
805 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
806
807 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
808
809 return 0;
810 }
811
812 static int emmaprp_release(struct file *file)
813 {
814 struct emmaprp_dev *pcdev = video_drvdata(file);
815 struct emmaprp_ctx *ctx = file->private_data;
816
817 dprintk(pcdev, "Releasing instance %p\n", ctx);
818
819 clk_disable(pcdev->clk_emma);
820 v4l2_m2m_ctx_release(ctx->m2m_ctx);
821 kfree(ctx);
822
823 return 0;
824 }
825
826 static unsigned int emmaprp_poll(struct file *file,
827 struct poll_table_struct *wait)
828 {
829 struct emmaprp_ctx *ctx = file->private_data;
830
831 return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
832 }
833
834 static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
835 {
836 struct emmaprp_ctx *ctx = file->private_data;
837
838 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
839 }
840
841 static const struct v4l2_file_operations emmaprp_fops = {
842 .owner = THIS_MODULE,
843 .open = emmaprp_open,
844 .release = emmaprp_release,
845 .poll = emmaprp_poll,
846 .unlocked_ioctl = video_ioctl2,
847 .mmap = emmaprp_mmap,
848 };
849
850 static struct video_device emmaprp_videodev = {
851 .name = MEM2MEM_NAME,
852 .fops = &emmaprp_fops,
853 .ioctl_ops = &emmaprp_ioctl_ops,
854 .minor = -1,
855 .release = video_device_release,
856 };
857
858 static struct v4l2_m2m_ops m2m_ops = {
859 .device_run = emmaprp_device_run,
860 .job_abort = emmaprp_job_abort,
861 .lock = emmaprp_lock,
862 .unlock = emmaprp_unlock,
863 };
864
865 static int emmaprp_probe(struct platform_device *pdev)
866 {
867 struct emmaprp_dev *pcdev;
868 struct video_device *vfd;
869 struct resource *res_emma;
870 int irq_emma;
871 int ret;
872
873 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
874 if (!pcdev)
875 return -ENOMEM;
876
877 spin_lock_init(&pcdev->irqlock);
878
879 pcdev->clk_emma = clk_get(&pdev->dev, NULL);
880 if (IS_ERR(pcdev->clk_emma)) {
881 ret = PTR_ERR(pcdev->clk_emma);
882 goto free_dev;
883 }
884
885 irq_emma = platform_get_irq(pdev, 0);
886 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
887 if (irq_emma < 0 || res_emma == NULL) {
888 dev_err(&pdev->dev, "Missing platform resources data\n");
889 ret = -ENODEV;
890 goto free_clk;
891 }
892
893 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
894 if (ret)
895 goto free_clk;
896
897 mutex_init(&pcdev->dev_mutex);
898
899 vfd = video_device_alloc();
900 if (!vfd) {
901 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
902 ret = -ENOMEM;
903 goto unreg_dev;
904 }
905
906 *vfd = emmaprp_videodev;
907 /* Locking in file operations other than ioctl should be done
908 by the driver, not the V4L2 core.
909 This driver needs auditing so that this flag can be removed. */
910 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
911 vfd->lock = &pcdev->dev_mutex;
912
913 video_set_drvdata(vfd, pcdev);
914 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
915 pcdev->vfd = vfd;
916 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
917 " Device registered as /dev/video%d\n", vfd->num);
918
919 platform_set_drvdata(pdev, pcdev);
920
921 if (devm_request_mem_region(&pdev->dev, res_emma->start,
922 resource_size(res_emma), MEM2MEM_NAME) == NULL)
923 goto rel_vdev;
924
925 pcdev->base_emma = devm_ioremap(&pdev->dev, res_emma->start,
926 resource_size(res_emma));
927 if (!pcdev->base_emma)
928 goto rel_vdev;
929
930 pcdev->irq_emma = irq_emma;
931 pcdev->res_emma = res_emma;
932
933 if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq,
934 0, MEM2MEM_NAME, pcdev) < 0)
935 goto rel_vdev;
936
937 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
938 if (IS_ERR(pcdev->alloc_ctx)) {
939 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
940 ret = PTR_ERR(pcdev->alloc_ctx);
941 goto rel_vdev;
942 }
943
944 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
945 if (IS_ERR(pcdev->m2m_dev)) {
946 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
947 ret = PTR_ERR(pcdev->m2m_dev);
948 goto rel_ctx;
949 }
950
951 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
952 if (ret) {
953 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
954 goto rel_m2m;
955 }
956
957 return 0;
958
959
960 rel_m2m:
961 v4l2_m2m_release(pcdev->m2m_dev);
962 rel_ctx:
963 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
964 rel_vdev:
965 video_device_release(vfd);
966 unreg_dev:
967 v4l2_device_unregister(&pcdev->v4l2_dev);
968 free_clk:
969 clk_put(pcdev->clk_emma);
970 free_dev:
971 kfree(pcdev);
972
973 return ret;
974 }
975
976 static int emmaprp_remove(struct platform_device *pdev)
977 {
978 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
979
980 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
981
982 video_unregister_device(pcdev->vfd);
983 v4l2_m2m_release(pcdev->m2m_dev);
984 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
985 v4l2_device_unregister(&pcdev->v4l2_dev);
986 clk_put(pcdev->clk_emma);
987 kfree(pcdev);
988
989 return 0;
990 }
991
992 static struct platform_driver emmaprp_pdrv = {
993 .probe = emmaprp_probe,
994 .remove = emmaprp_remove,
995 .driver = {
996 .name = MEM2MEM_NAME,
997 .owner = THIS_MODULE,
998 },
999 };
1000
1001 static void __exit emmaprp_exit(void)
1002 {
1003 platform_driver_unregister(&emmaprp_pdrv);
1004 }
1005
1006 static int __init emmaprp_init(void)
1007 {
1008 return platform_driver_register(&emmaprp_pdrv);
1009 }
1010
1011 module_init(emmaprp_init);
1012 module_exit(emmaprp_exit);
Linux kernel - Deliverables
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