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 <linux/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
find_format(struct v4l2_format * f)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 void __iomem *base_emma;
211 struct clk *clk_emma_ahb, *clk_emma_ipg;
212
213 struct v4l2_m2m_dev *m2m_dev;
214 struct vb2_alloc_ctx *alloc_ctx;
215 };
216
217 struct emmaprp_ctx {
218 struct emmaprp_dev *dev;
219 /* Abort requested by m2m */
220 int aborting;
221 struct emmaprp_q_data q_data[2];
222 struct v4l2_m2m_ctx *m2m_ctx;
223 };
224
get_q_data(struct emmaprp_ctx * ctx,enum v4l2_buf_type type)225 static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
226 enum v4l2_buf_type type)
227 {
228 switch (type) {
229 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
230 return &(ctx->q_data[V4L2_M2M_SRC]);
231 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
232 return &(ctx->q_data[V4L2_M2M_DST]);
233 default:
234 BUG();
235 }
236 return NULL;
237 }
238
239 /*
240 * mem2mem callbacks
241 */
emmaprp_job_abort(void * priv)242 static void emmaprp_job_abort(void *priv)
243 {
244 struct emmaprp_ctx *ctx = priv;
245 struct emmaprp_dev *pcdev = ctx->dev;
246
247 ctx->aborting = 1;
248
249 dprintk(pcdev, "Aborting task\n");
250
251 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
252 }
253
emmaprp_lock(void * priv)254 static void emmaprp_lock(void *priv)
255 {
256 struct emmaprp_ctx *ctx = priv;
257 struct emmaprp_dev *pcdev = ctx->dev;
258 mutex_lock(&pcdev->dev_mutex);
259 }
260
emmaprp_unlock(void * priv)261 static void emmaprp_unlock(void *priv)
262 {
263 struct emmaprp_ctx *ctx = priv;
264 struct emmaprp_dev *pcdev = ctx->dev;
265 mutex_unlock(&pcdev->dev_mutex);
266 }
267
emmaprp_dump_regs(struct emmaprp_dev * pcdev)268 static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
269 {
270 dprintk(pcdev,
271 "eMMa-PrP Registers:\n"
272 " SOURCE_Y_PTR = 0x%08X\n"
273 " SRC_FRAME_SIZE = 0x%08X\n"
274 " DEST_Y_PTR = 0x%08X\n"
275 " DEST_CR_PTR = 0x%08X\n"
276 " DEST_CB_PTR = 0x%08X\n"
277 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
278 " CNTL = 0x%08X\n",
279 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
280 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
281 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
282 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
283 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
284 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
285 readl(pcdev->base_emma + PRP_CNTL));
286 }
287
emmaprp_device_run(void * priv)288 static void emmaprp_device_run(void *priv)
289 {
290 struct emmaprp_ctx *ctx = priv;
291 struct emmaprp_q_data *s_q_data, *d_q_data;
292 struct vb2_buffer *src_buf, *dst_buf;
293 struct emmaprp_dev *pcdev = ctx->dev;
294 unsigned int s_width, s_height;
295 unsigned int d_width, d_height;
296 unsigned int d_size;
297 dma_addr_t p_in, p_out;
298 u32 tmp;
299
300 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
301 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
302
303 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
304 s_width = s_q_data->width;
305 s_height = s_q_data->height;
306
307 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
308 d_width = d_q_data->width;
309 d_height = d_q_data->height;
310 d_size = d_width * d_height;
311
312 p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
313 p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
314 if (!p_in || !p_out) {
315 v4l2_err(&pcdev->v4l2_dev,
316 "Acquiring kernel pointers to buffers failed\n");
317 return;
318 }
319
320 /* Input frame parameters */
321 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
322 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
323 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
324
325 /* Output frame parameters */
326 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
327 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
328 writel(p_out + d_size + (d_size >> 2),
329 pcdev->base_emma + PRP_DEST_CR_PTR);
330 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
331 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
332
333 /* IRQ configuration */
334 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
335 writel(tmp | PRP_INTR_RDERR |
336 PRP_INTR_CH2WERR |
337 PRP_INTR_CH2FC,
338 pcdev->base_emma + PRP_INTR_CNTL);
339
340 emmaprp_dump_regs(pcdev);
341
342 /* Enable transfer */
343 tmp = readl(pcdev->base_emma + PRP_CNTL);
344 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
345 PRP_CNTL_DATA_IN_YUV422 |
346 PRP_CNTL_CH2EN,
347 pcdev->base_emma + PRP_CNTL);
348 }
349
emmaprp_irq(int irq_emma,void * data)350 static irqreturn_t emmaprp_irq(int irq_emma, void *data)
351 {
352 struct emmaprp_dev *pcdev = data;
353 struct emmaprp_ctx *curr_ctx;
354 struct vb2_v4l2_buffer *src_vb, *dst_vb;
355 unsigned long flags;
356 u32 irqst;
357
358 /* Check irq flags and clear irq */
359 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
360 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
361 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
362
363 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
364 if (curr_ctx == NULL) {
365 pr_err("Instance released before the end of transaction\n");
366 return IRQ_HANDLED;
367 }
368
369 if (!curr_ctx->aborting) {
370 if ((irqst & PRP_INTR_ST_RDERR) ||
371 (irqst & PRP_INTR_ST_CH2WERR)) {
372 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
373 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
374 } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
375 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
376 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
377
378 dst_vb->timestamp = src_vb->timestamp;
379 dst_vb->flags &=
380 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
381 dst_vb->flags |=
382 src_vb->flags
383 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
384 dst_vb->timecode = src_vb->timecode;
385
386 spin_lock_irqsave(&pcdev->irqlock, flags);
387 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
388 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
389 spin_unlock_irqrestore(&pcdev->irqlock, flags);
390 }
391 }
392
393 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
394 return IRQ_HANDLED;
395 }
396
397 /*
398 * video ioctls
399 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)400 static int vidioc_querycap(struct file *file, void *priv,
401 struct v4l2_capability *cap)
402 {
403 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
404 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
405 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
406 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
407 return 0;
408 }
409
enum_fmt(struct v4l2_fmtdesc * f,u32 type)410 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
411 {
412 int i, num;
413 struct emmaprp_fmt *fmt;
414
415 num = 0;
416
417 for (i = 0; i < NUM_FORMATS; ++i) {
418 if (formats[i].types & type) {
419 /* index-th format of type type found ? */
420 if (num == f->index)
421 break;
422 /* Correct type but haven't reached our index yet,
423 * just increment per-type index */
424 ++num;
425 }
426 }
427
428 if (i < NUM_FORMATS) {
429 /* Format found */
430 fmt = &formats[i];
431 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
432 f->pixelformat = fmt->fourcc;
433 return 0;
434 }
435
436 /* Format not found */
437 return -EINVAL;
438 }
439
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)440 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
441 struct v4l2_fmtdesc *f)
442 {
443 return enum_fmt(f, MEM2MEM_CAPTURE);
444 }
445
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)446 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
447 struct v4l2_fmtdesc *f)
448 {
449 return enum_fmt(f, MEM2MEM_OUTPUT);
450 }
451
vidioc_g_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)452 static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
453 {
454 struct vb2_queue *vq;
455 struct emmaprp_q_data *q_data;
456
457 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
458 if (!vq)
459 return -EINVAL;
460
461 q_data = get_q_data(ctx, f->type);
462
463 f->fmt.pix.width = q_data->width;
464 f->fmt.pix.height = q_data->height;
465 f->fmt.pix.field = V4L2_FIELD_NONE;
466 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
467 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
468 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
469 else /* YUYV */
470 f->fmt.pix.bytesperline = q_data->width * 2;
471 f->fmt.pix.sizeimage = q_data->sizeimage;
472
473 return 0;
474 }
475
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)476 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
477 struct v4l2_format *f)
478 {
479 return vidioc_g_fmt(priv, f);
480 }
481
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)482 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
483 struct v4l2_format *f)
484 {
485 return vidioc_g_fmt(priv, f);
486 }
487
vidioc_try_fmt(struct v4l2_format * f)488 static int vidioc_try_fmt(struct v4l2_format *f)
489 {
490 enum v4l2_field field;
491
492
493 if (!find_format(f))
494 return -EINVAL;
495
496 field = f->fmt.pix.field;
497 if (field == V4L2_FIELD_ANY)
498 field = V4L2_FIELD_NONE;
499 else if (V4L2_FIELD_NONE != field)
500 return -EINVAL;
501
502 /* V4L2 specification suggests the driver corrects the format struct
503 * if any of the dimensions is unsupported */
504 f->fmt.pix.field = field;
505
506 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
507 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
508 W_ALIGN_YUV420, &f->fmt.pix.height,
509 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
510 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
511 } else {
512 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
513 W_ALIGN_OTHERS, &f->fmt.pix.height,
514 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
515 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
516 }
517 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
518
519 return 0;
520 }
521
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)522 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
523 struct v4l2_format *f)
524 {
525 struct emmaprp_fmt *fmt;
526 struct emmaprp_ctx *ctx = priv;
527
528 fmt = find_format(f);
529 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
530 v4l2_err(&ctx->dev->v4l2_dev,
531 "Fourcc format (0x%08x) invalid.\n",
532 f->fmt.pix.pixelformat);
533 return -EINVAL;
534 }
535
536 return vidioc_try_fmt(f);
537 }
538
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)539 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
540 struct v4l2_format *f)
541 {
542 struct emmaprp_fmt *fmt;
543 struct emmaprp_ctx *ctx = priv;
544
545 fmt = find_format(f);
546 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
547 v4l2_err(&ctx->dev->v4l2_dev,
548 "Fourcc format (0x%08x) invalid.\n",
549 f->fmt.pix.pixelformat);
550 return -EINVAL;
551 }
552
553 return vidioc_try_fmt(f);
554 }
555
vidioc_s_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)556 static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
557 {
558 struct emmaprp_q_data *q_data;
559 struct vb2_queue *vq;
560 int ret;
561
562 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
563 if (!vq)
564 return -EINVAL;
565
566 q_data = get_q_data(ctx, f->type);
567 if (!q_data)
568 return -EINVAL;
569
570 if (vb2_is_busy(vq)) {
571 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
572 return -EBUSY;
573 }
574
575 ret = vidioc_try_fmt(f);
576 if (ret)
577 return ret;
578
579 q_data->fmt = find_format(f);
580 q_data->width = f->fmt.pix.width;
581 q_data->height = f->fmt.pix.height;
582 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
583 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
584 else /* YUYV */
585 q_data->sizeimage = q_data->width * q_data->height * 2;
586
587 dprintk(ctx->dev,
588 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
589 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
590
591 return 0;
592 }
593
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)594 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
595 struct v4l2_format *f)
596 {
597 int ret;
598
599 ret = vidioc_try_fmt_vid_cap(file, priv, f);
600 if (ret)
601 return ret;
602
603 return vidioc_s_fmt(priv, f);
604 }
605
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)606 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
607 struct v4l2_format *f)
608 {
609 int ret;
610
611 ret = vidioc_try_fmt_vid_out(file, priv, f);
612 if (ret)
613 return ret;
614
615 return vidioc_s_fmt(priv, f);
616 }
617
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * reqbufs)618 static int vidioc_reqbufs(struct file *file, void *priv,
619 struct v4l2_requestbuffers *reqbufs)
620 {
621 struct emmaprp_ctx *ctx = priv;
622
623 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
624 }
625
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * buf)626 static int vidioc_querybuf(struct file *file, void *priv,
627 struct v4l2_buffer *buf)
628 {
629 struct emmaprp_ctx *ctx = priv;
630
631 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
632 }
633
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * buf)634 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
635 {
636 struct emmaprp_ctx *ctx = priv;
637
638 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
639 }
640
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * buf)641 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
642 {
643 struct emmaprp_ctx *ctx = priv;
644
645 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
646 }
647
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type type)648 static int vidioc_streamon(struct file *file, void *priv,
649 enum v4l2_buf_type type)
650 {
651 struct emmaprp_ctx *ctx = priv;
652
653 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
654 }
655
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type type)656 static int vidioc_streamoff(struct file *file, void *priv,
657 enum v4l2_buf_type type)
658 {
659 struct emmaprp_ctx *ctx = priv;
660
661 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
662 }
663
664 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
665 .vidioc_querycap = vidioc_querycap,
666
667 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
668 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
669 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
670 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
671
672 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
673 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
674 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
675 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
676
677 .vidioc_reqbufs = vidioc_reqbufs,
678 .vidioc_querybuf = vidioc_querybuf,
679
680 .vidioc_qbuf = vidioc_qbuf,
681 .vidioc_dqbuf = vidioc_dqbuf,
682
683 .vidioc_streamon = vidioc_streamon,
684 .vidioc_streamoff = vidioc_streamoff,
685 };
686
687
688 /*
689 * Queue operations
690 */
emmaprp_queue_setup(struct vb2_queue * vq,const void * parg,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])691 static int emmaprp_queue_setup(struct vb2_queue *vq,
692 const void *parg,
693 unsigned int *nbuffers, unsigned int *nplanes,
694 unsigned int sizes[], void *alloc_ctxs[])
695 {
696 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
697 struct emmaprp_q_data *q_data;
698 unsigned int size, count = *nbuffers;
699
700 q_data = get_q_data(ctx, vq->type);
701
702 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
703 size = q_data->width * q_data->height * 3 / 2;
704 else
705 size = q_data->width * q_data->height * 2;
706
707 while (size * count > MEM2MEM_VID_MEM_LIMIT)
708 (count)--;
709
710 *nplanes = 1;
711 *nbuffers = count;
712 sizes[0] = size;
713
714 alloc_ctxs[0] = ctx->dev->alloc_ctx;
715
716 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
717
718 return 0;
719 }
720
emmaprp_buf_prepare(struct vb2_buffer * vb)721 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
722 {
723 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
724 struct emmaprp_q_data *q_data;
725
726 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
727
728 q_data = get_q_data(ctx, vb->vb2_queue->type);
729
730 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
731 dprintk(ctx->dev, "%s data will not fit into plane"
732 "(%lu < %lu)\n", __func__,
733 vb2_plane_size(vb, 0),
734 (long)q_data->sizeimage);
735 return -EINVAL;
736 }
737
738 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
739
740 return 0;
741 }
742
emmaprp_buf_queue(struct vb2_buffer * vb)743 static void emmaprp_buf_queue(struct vb2_buffer *vb)
744 {
745 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
746 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
747 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
748 }
749
750 static struct vb2_ops emmaprp_qops = {
751 .queue_setup = emmaprp_queue_setup,
752 .buf_prepare = emmaprp_buf_prepare,
753 .buf_queue = emmaprp_buf_queue,
754 };
755
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)756 static int queue_init(void *priv, struct vb2_queue *src_vq,
757 struct vb2_queue *dst_vq)
758 {
759 struct emmaprp_ctx *ctx = priv;
760 int ret;
761
762 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
763 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
764 src_vq->drv_priv = ctx;
765 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
766 src_vq->ops = &emmaprp_qops;
767 src_vq->mem_ops = &vb2_dma_contig_memops;
768 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
769
770 ret = vb2_queue_init(src_vq);
771 if (ret)
772 return ret;
773
774 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
775 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
776 dst_vq->drv_priv = ctx;
777 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
778 dst_vq->ops = &emmaprp_qops;
779 dst_vq->mem_ops = &vb2_dma_contig_memops;
780 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
781
782 return vb2_queue_init(dst_vq);
783 }
784
785 /*
786 * File operations
787 */
emmaprp_open(struct file * file)788 static int emmaprp_open(struct file *file)
789 {
790 struct emmaprp_dev *pcdev = video_drvdata(file);
791 struct emmaprp_ctx *ctx;
792
793 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
794 if (!ctx)
795 return -ENOMEM;
796
797 file->private_data = ctx;
798 ctx->dev = pcdev;
799
800 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
801 kfree(ctx);
802 return -ERESTARTSYS;
803 }
804
805 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
806
807 if (IS_ERR(ctx->m2m_ctx)) {
808 int ret = PTR_ERR(ctx->m2m_ctx);
809
810 mutex_unlock(&pcdev->dev_mutex);
811 kfree(ctx);
812 return ret;
813 }
814
815 clk_prepare_enable(pcdev->clk_emma_ipg);
816 clk_prepare_enable(pcdev->clk_emma_ahb);
817 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
818 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
819 mutex_unlock(&pcdev->dev_mutex);
820
821 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
822
823 return 0;
824 }
825
emmaprp_release(struct file * file)826 static int emmaprp_release(struct file *file)
827 {
828 struct emmaprp_dev *pcdev = video_drvdata(file);
829 struct emmaprp_ctx *ctx = file->private_data;
830
831 dprintk(pcdev, "Releasing instance %p\n", ctx);
832
833 mutex_lock(&pcdev->dev_mutex);
834 clk_disable_unprepare(pcdev->clk_emma_ahb);
835 clk_disable_unprepare(pcdev->clk_emma_ipg);
836 v4l2_m2m_ctx_release(ctx->m2m_ctx);
837 mutex_unlock(&pcdev->dev_mutex);
838 kfree(ctx);
839
840 return 0;
841 }
842
emmaprp_poll(struct file * file,struct poll_table_struct * wait)843 static unsigned int emmaprp_poll(struct file *file,
844 struct poll_table_struct *wait)
845 {
846 struct emmaprp_dev *pcdev = video_drvdata(file);
847 struct emmaprp_ctx *ctx = file->private_data;
848 unsigned int res;
849
850 mutex_lock(&pcdev->dev_mutex);
851 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
852 mutex_unlock(&pcdev->dev_mutex);
853 return res;
854 }
855
emmaprp_mmap(struct file * file,struct vm_area_struct * vma)856 static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
857 {
858 struct emmaprp_dev *pcdev = video_drvdata(file);
859 struct emmaprp_ctx *ctx = file->private_data;
860 int ret;
861
862 if (mutex_lock_interruptible(&pcdev->dev_mutex))
863 return -ERESTARTSYS;
864 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
865 mutex_unlock(&pcdev->dev_mutex);
866 return ret;
867 }
868
869 static const struct v4l2_file_operations emmaprp_fops = {
870 .owner = THIS_MODULE,
871 .open = emmaprp_open,
872 .release = emmaprp_release,
873 .poll = emmaprp_poll,
874 .unlocked_ioctl = video_ioctl2,
875 .mmap = emmaprp_mmap,
876 };
877
878 static struct video_device emmaprp_videodev = {
879 .name = MEM2MEM_NAME,
880 .fops = &emmaprp_fops,
881 .ioctl_ops = &emmaprp_ioctl_ops,
882 .minor = -1,
883 .release = video_device_release,
884 .vfl_dir = VFL_DIR_M2M,
885 };
886
887 static struct v4l2_m2m_ops m2m_ops = {
888 .device_run = emmaprp_device_run,
889 .job_abort = emmaprp_job_abort,
890 .lock = emmaprp_lock,
891 .unlock = emmaprp_unlock,
892 };
893
emmaprp_probe(struct platform_device * pdev)894 static int emmaprp_probe(struct platform_device *pdev)
895 {
896 struct emmaprp_dev *pcdev;
897 struct video_device *vfd;
898 struct resource *res;
899 int irq, ret;
900
901 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
902 if (!pcdev)
903 return -ENOMEM;
904
905 spin_lock_init(&pcdev->irqlock);
906
907 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
908 if (IS_ERR(pcdev->clk_emma_ipg)) {
909 return PTR_ERR(pcdev->clk_emma_ipg);
910 }
911
912 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
913 if (IS_ERR(pcdev->clk_emma_ahb))
914 return PTR_ERR(pcdev->clk_emma_ahb);
915
916 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
917 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
918 if (IS_ERR(pcdev->base_emma))
919 return PTR_ERR(pcdev->base_emma);
920
921 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
922 if (ret)
923 return ret;
924
925 mutex_init(&pcdev->dev_mutex);
926
927 vfd = video_device_alloc();
928 if (!vfd) {
929 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
930 ret = -ENOMEM;
931 goto unreg_dev;
932 }
933
934 *vfd = emmaprp_videodev;
935 vfd->lock = &pcdev->dev_mutex;
936 vfd->v4l2_dev = &pcdev->v4l2_dev;
937
938 video_set_drvdata(vfd, pcdev);
939 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
940 pcdev->vfd = vfd;
941 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
942 " Device registered as /dev/video%d\n", vfd->num);
943
944 platform_set_drvdata(pdev, pcdev);
945
946 irq = platform_get_irq(pdev, 0);
947 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
948 dev_name(&pdev->dev), pcdev);
949 if (ret)
950 goto rel_vdev;
951
952 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
953 if (IS_ERR(pcdev->alloc_ctx)) {
954 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
955 ret = PTR_ERR(pcdev->alloc_ctx);
956 goto rel_vdev;
957 }
958
959 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
960 if (IS_ERR(pcdev->m2m_dev)) {
961 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
962 ret = PTR_ERR(pcdev->m2m_dev);
963 goto rel_ctx;
964 }
965
966 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
967 if (ret) {
968 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
969 goto rel_m2m;
970 }
971
972 return 0;
973
974
975 rel_m2m:
976 v4l2_m2m_release(pcdev->m2m_dev);
977 rel_ctx:
978 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
979 rel_vdev:
980 video_device_release(vfd);
981 unreg_dev:
982 v4l2_device_unregister(&pcdev->v4l2_dev);
983
984 mutex_destroy(&pcdev->dev_mutex);
985
986 return ret;
987 }
988
emmaprp_remove(struct platform_device * pdev)989 static int emmaprp_remove(struct platform_device *pdev)
990 {
991 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
992
993 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
994
995 video_unregister_device(pcdev->vfd);
996 v4l2_m2m_release(pcdev->m2m_dev);
997 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
998 v4l2_device_unregister(&pcdev->v4l2_dev);
999 mutex_destroy(&pcdev->dev_mutex);
1000
1001 return 0;
1002 }
1003
1004 static struct platform_driver emmaprp_pdrv = {
1005 .probe = emmaprp_probe,
1006 .remove = emmaprp_remove,
1007 .driver = {
1008 .name = MEM2MEM_NAME,
1009 },
1010 };
1011 module_platform_driver(emmaprp_pdrv);
1012