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_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->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
379 dst_vb->v4l2_buf.flags &=
380 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
381 dst_vb->v4l2_buf.flags |=
382 src_vb->v4l2_buf.flags
383 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
384 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.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 /*
406 * This is only a mem-to-mem video device. The capture and output
407 * device capability flags are left only for backward compatibility
408 * and are scheduled for removal.
409 */
410 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
411 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
412 return 0;
413 }
414
enum_fmt(struct v4l2_fmtdesc * f,u32 type)415 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
416 {
417 int i, num;
418 struct emmaprp_fmt *fmt;
419
420 num = 0;
421
422 for (i = 0; i < NUM_FORMATS; ++i) {
423 if (formats[i].types & type) {
424 /* index-th format of type type found ? */
425 if (num == f->index)
426 break;
427 /* Correct type but haven't reached our index yet,
428 * just increment per-type index */
429 ++num;
430 }
431 }
432
433 if (i < NUM_FORMATS) {
434 /* Format found */
435 fmt = &formats[i];
436 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
437 f->pixelformat = fmt->fourcc;
438 return 0;
439 }
440
441 /* Format not found */
442 return -EINVAL;
443 }
444
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)445 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
446 struct v4l2_fmtdesc *f)
447 {
448 return enum_fmt(f, MEM2MEM_CAPTURE);
449 }
450
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)451 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
452 struct v4l2_fmtdesc *f)
453 {
454 return enum_fmt(f, MEM2MEM_OUTPUT);
455 }
456
vidioc_g_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)457 static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
458 {
459 struct vb2_queue *vq;
460 struct emmaprp_q_data *q_data;
461
462 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
463 if (!vq)
464 return -EINVAL;
465
466 q_data = get_q_data(ctx, f->type);
467
468 f->fmt.pix.width = q_data->width;
469 f->fmt.pix.height = q_data->height;
470 f->fmt.pix.field = V4L2_FIELD_NONE;
471 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
472 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
473 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
474 else /* YUYV */
475 f->fmt.pix.bytesperline = q_data->width * 2;
476 f->fmt.pix.sizeimage = q_data->sizeimage;
477
478 return 0;
479 }
480
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)481 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
482 struct v4l2_format *f)
483 {
484 return vidioc_g_fmt(priv, f);
485 }
486
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)487 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
488 struct v4l2_format *f)
489 {
490 return vidioc_g_fmt(priv, f);
491 }
492
vidioc_try_fmt(struct v4l2_format * f)493 static int vidioc_try_fmt(struct v4l2_format *f)
494 {
495 enum v4l2_field field;
496
497
498 if (!find_format(f))
499 return -EINVAL;
500
501 field = f->fmt.pix.field;
502 if (field == V4L2_FIELD_ANY)
503 field = V4L2_FIELD_NONE;
504 else if (V4L2_FIELD_NONE != field)
505 return -EINVAL;
506
507 /* V4L2 specification suggests the driver corrects the format struct
508 * if any of the dimensions is unsupported */
509 f->fmt.pix.field = field;
510
511 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
512 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
513 W_ALIGN_YUV420, &f->fmt.pix.height,
514 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
515 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
516 } else {
517 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
518 W_ALIGN_OTHERS, &f->fmt.pix.height,
519 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
520 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
521 }
522 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
523
524 return 0;
525 }
526
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)527 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
528 struct v4l2_format *f)
529 {
530 struct emmaprp_fmt *fmt;
531 struct emmaprp_ctx *ctx = priv;
532
533 fmt = find_format(f);
534 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
535 v4l2_err(&ctx->dev->v4l2_dev,
536 "Fourcc format (0x%08x) invalid.\n",
537 f->fmt.pix.pixelformat);
538 return -EINVAL;
539 }
540
541 return vidioc_try_fmt(f);
542 }
543
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)544 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
545 struct v4l2_format *f)
546 {
547 struct emmaprp_fmt *fmt;
548 struct emmaprp_ctx *ctx = priv;
549
550 fmt = find_format(f);
551 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
552 v4l2_err(&ctx->dev->v4l2_dev,
553 "Fourcc format (0x%08x) invalid.\n",
554 f->fmt.pix.pixelformat);
555 return -EINVAL;
556 }
557
558 return vidioc_try_fmt(f);
559 }
560
vidioc_s_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)561 static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
562 {
563 struct emmaprp_q_data *q_data;
564 struct vb2_queue *vq;
565 int ret;
566
567 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
568 if (!vq)
569 return -EINVAL;
570
571 q_data = get_q_data(ctx, f->type);
572 if (!q_data)
573 return -EINVAL;
574
575 if (vb2_is_busy(vq)) {
576 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
577 return -EBUSY;
578 }
579
580 ret = vidioc_try_fmt(f);
581 if (ret)
582 return ret;
583
584 q_data->fmt = find_format(f);
585 q_data->width = f->fmt.pix.width;
586 q_data->height = f->fmt.pix.height;
587 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
588 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
589 else /* YUYV */
590 q_data->sizeimage = q_data->width * q_data->height * 2;
591
592 dprintk(ctx->dev,
593 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
594 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
595
596 return 0;
597 }
598
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)599 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
600 struct v4l2_format *f)
601 {
602 int ret;
603
604 ret = vidioc_try_fmt_vid_cap(file, priv, f);
605 if (ret)
606 return ret;
607
608 return vidioc_s_fmt(priv, f);
609 }
610
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)611 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
612 struct v4l2_format *f)
613 {
614 int ret;
615
616 ret = vidioc_try_fmt_vid_out(file, priv, f);
617 if (ret)
618 return ret;
619
620 return vidioc_s_fmt(priv, f);
621 }
622
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * reqbufs)623 static int vidioc_reqbufs(struct file *file, void *priv,
624 struct v4l2_requestbuffers *reqbufs)
625 {
626 struct emmaprp_ctx *ctx = priv;
627
628 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
629 }
630
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * buf)631 static int vidioc_querybuf(struct file *file, void *priv,
632 struct v4l2_buffer *buf)
633 {
634 struct emmaprp_ctx *ctx = priv;
635
636 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
637 }
638
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * buf)639 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
640 {
641 struct emmaprp_ctx *ctx = priv;
642
643 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
644 }
645
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * buf)646 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
647 {
648 struct emmaprp_ctx *ctx = priv;
649
650 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
651 }
652
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type type)653 static int vidioc_streamon(struct file *file, void *priv,
654 enum v4l2_buf_type type)
655 {
656 struct emmaprp_ctx *ctx = priv;
657
658 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
659 }
660
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type type)661 static int vidioc_streamoff(struct file *file, void *priv,
662 enum v4l2_buf_type type)
663 {
664 struct emmaprp_ctx *ctx = priv;
665
666 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
667 }
668
669 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
670 .vidioc_querycap = vidioc_querycap,
671
672 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
673 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
674 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
675 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
676
677 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
678 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
679 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
680 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
681
682 .vidioc_reqbufs = vidioc_reqbufs,
683 .vidioc_querybuf = vidioc_querybuf,
684
685 .vidioc_qbuf = vidioc_qbuf,
686 .vidioc_dqbuf = vidioc_dqbuf,
687
688 .vidioc_streamon = vidioc_streamon,
689 .vidioc_streamoff = vidioc_streamoff,
690 };
691
692
693 /*
694 * Queue operations
695 */
emmaprp_queue_setup(struct vb2_queue * vq,const struct v4l2_format * fmt,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])696 static int emmaprp_queue_setup(struct vb2_queue *vq,
697 const struct v4l2_format *fmt,
698 unsigned int *nbuffers, unsigned int *nplanes,
699 unsigned int sizes[], void *alloc_ctxs[])
700 {
701 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
702 struct emmaprp_q_data *q_data;
703 unsigned int size, count = *nbuffers;
704
705 q_data = get_q_data(ctx, vq->type);
706
707 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
708 size = q_data->width * q_data->height * 3 / 2;
709 else
710 size = q_data->width * q_data->height * 2;
711
712 while (size * count > MEM2MEM_VID_MEM_LIMIT)
713 (count)--;
714
715 *nplanes = 1;
716 *nbuffers = count;
717 sizes[0] = size;
718
719 alloc_ctxs[0] = ctx->dev->alloc_ctx;
720
721 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
722
723 return 0;
724 }
725
emmaprp_buf_prepare(struct vb2_buffer * vb)726 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
727 {
728 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
729 struct emmaprp_q_data *q_data;
730
731 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
732
733 q_data = get_q_data(ctx, vb->vb2_queue->type);
734
735 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
736 dprintk(ctx->dev, "%s data will not fit into plane"
737 "(%lu < %lu)\n", __func__,
738 vb2_plane_size(vb, 0),
739 (long)q_data->sizeimage);
740 return -EINVAL;
741 }
742
743 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
744
745 return 0;
746 }
747
emmaprp_buf_queue(struct vb2_buffer * vb)748 static void emmaprp_buf_queue(struct vb2_buffer *vb)
749 {
750 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
751 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
752 }
753
754 static struct vb2_ops emmaprp_qops = {
755 .queue_setup = emmaprp_queue_setup,
756 .buf_prepare = emmaprp_buf_prepare,
757 .buf_queue = emmaprp_buf_queue,
758 };
759
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)760 static int queue_init(void *priv, struct vb2_queue *src_vq,
761 struct vb2_queue *dst_vq)
762 {
763 struct emmaprp_ctx *ctx = priv;
764 int ret;
765
766 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
767 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
768 src_vq->drv_priv = ctx;
769 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
770 src_vq->ops = &emmaprp_qops;
771 src_vq->mem_ops = &vb2_dma_contig_memops;
772 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
773
774 ret = vb2_queue_init(src_vq);
775 if (ret)
776 return ret;
777
778 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
779 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
780 dst_vq->drv_priv = ctx;
781 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
782 dst_vq->ops = &emmaprp_qops;
783 dst_vq->mem_ops = &vb2_dma_contig_memops;
784 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
785
786 return vb2_queue_init(dst_vq);
787 }
788
789 /*
790 * File operations
791 */
emmaprp_open(struct file * file)792 static int emmaprp_open(struct file *file)
793 {
794 struct emmaprp_dev *pcdev = video_drvdata(file);
795 struct emmaprp_ctx *ctx;
796
797 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
798 if (!ctx)
799 return -ENOMEM;
800
801 file->private_data = ctx;
802 ctx->dev = pcdev;
803
804 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
805 kfree(ctx);
806 return -ERESTARTSYS;
807 }
808
809 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
810
811 if (IS_ERR(ctx->m2m_ctx)) {
812 int ret = PTR_ERR(ctx->m2m_ctx);
813
814 mutex_unlock(&pcdev->dev_mutex);
815 kfree(ctx);
816 return ret;
817 }
818
819 clk_prepare_enable(pcdev->clk_emma_ipg);
820 clk_prepare_enable(pcdev->clk_emma_ahb);
821 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
822 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
823 mutex_unlock(&pcdev->dev_mutex);
824
825 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
826
827 return 0;
828 }
829
emmaprp_release(struct file * file)830 static int emmaprp_release(struct file *file)
831 {
832 struct emmaprp_dev *pcdev = video_drvdata(file);
833 struct emmaprp_ctx *ctx = file->private_data;
834
835 dprintk(pcdev, "Releasing instance %p\n", ctx);
836
837 mutex_lock(&pcdev->dev_mutex);
838 clk_disable_unprepare(pcdev->clk_emma_ahb);
839 clk_disable_unprepare(pcdev->clk_emma_ipg);
840 v4l2_m2m_ctx_release(ctx->m2m_ctx);
841 mutex_unlock(&pcdev->dev_mutex);
842 kfree(ctx);
843
844 return 0;
845 }
846
emmaprp_poll(struct file * file,struct poll_table_struct * wait)847 static unsigned int emmaprp_poll(struct file *file,
848 struct poll_table_struct *wait)
849 {
850 struct emmaprp_dev *pcdev = video_drvdata(file);
851 struct emmaprp_ctx *ctx = file->private_data;
852 unsigned int res;
853
854 mutex_lock(&pcdev->dev_mutex);
855 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
856 mutex_unlock(&pcdev->dev_mutex);
857 return res;
858 }
859
emmaprp_mmap(struct file * file,struct vm_area_struct * vma)860 static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
861 {
862 struct emmaprp_dev *pcdev = video_drvdata(file);
863 struct emmaprp_ctx *ctx = file->private_data;
864 int ret;
865
866 if (mutex_lock_interruptible(&pcdev->dev_mutex))
867 return -ERESTARTSYS;
868 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
869 mutex_unlock(&pcdev->dev_mutex);
870 return ret;
871 }
872
873 static const struct v4l2_file_operations emmaprp_fops = {
874 .owner = THIS_MODULE,
875 .open = emmaprp_open,
876 .release = emmaprp_release,
877 .poll = emmaprp_poll,
878 .unlocked_ioctl = video_ioctl2,
879 .mmap = emmaprp_mmap,
880 };
881
882 static struct video_device emmaprp_videodev = {
883 .name = MEM2MEM_NAME,
884 .fops = &emmaprp_fops,
885 .ioctl_ops = &emmaprp_ioctl_ops,
886 .minor = -1,
887 .release = video_device_release,
888 .vfl_dir = VFL_DIR_M2M,
889 };
890
891 static struct v4l2_m2m_ops m2m_ops = {
892 .device_run = emmaprp_device_run,
893 .job_abort = emmaprp_job_abort,
894 .lock = emmaprp_lock,
895 .unlock = emmaprp_unlock,
896 };
897
emmaprp_probe(struct platform_device * pdev)898 static int emmaprp_probe(struct platform_device *pdev)
899 {
900 struct emmaprp_dev *pcdev;
901 struct video_device *vfd;
902 struct resource *res;
903 int irq, ret;
904
905 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
906 if (!pcdev)
907 return -ENOMEM;
908
909 spin_lock_init(&pcdev->irqlock);
910
911 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
912 if (IS_ERR(pcdev->clk_emma_ipg)) {
913 return PTR_ERR(pcdev->clk_emma_ipg);
914 }
915
916 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
917 if (IS_ERR(pcdev->clk_emma_ahb))
918 return PTR_ERR(pcdev->clk_emma_ahb);
919
920 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
921 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
922 if (IS_ERR(pcdev->base_emma))
923 return PTR_ERR(pcdev->base_emma);
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 vfd->v4l2_dev = &pcdev->v4l2_dev;
941
942 video_set_drvdata(vfd, pcdev);
943 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
944 pcdev->vfd = vfd;
945 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
946 " Device registered as /dev/video%d\n", vfd->num);
947
948 platform_set_drvdata(pdev, pcdev);
949
950 irq = platform_get_irq(pdev, 0);
951 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
952 dev_name(&pdev->dev), pcdev);
953 if (ret)
954 goto rel_vdev;
955
956 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
957 if (IS_ERR(pcdev->alloc_ctx)) {
958 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
959 ret = PTR_ERR(pcdev->alloc_ctx);
960 goto rel_vdev;
961 }
962
963 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
964 if (IS_ERR(pcdev->m2m_dev)) {
965 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
966 ret = PTR_ERR(pcdev->m2m_dev);
967 goto rel_ctx;
968 }
969
970 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
971 if (ret) {
972 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
973 goto rel_m2m;
974 }
975
976 return 0;
977
978
979 rel_m2m:
980 v4l2_m2m_release(pcdev->m2m_dev);
981 rel_ctx:
982 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
983 rel_vdev:
984 video_device_release(vfd);
985 unreg_dev:
986 v4l2_device_unregister(&pcdev->v4l2_dev);
987
988 mutex_destroy(&pcdev->dev_mutex);
989
990 return ret;
991 }
992
emmaprp_remove(struct platform_device * pdev)993 static int emmaprp_remove(struct platform_device *pdev)
994 {
995 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
996
997 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
998
999 video_unregister_device(pcdev->vfd);
1000 v4l2_m2m_release(pcdev->m2m_dev);
1001 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1002 v4l2_device_unregister(&pcdev->v4l2_dev);
1003 mutex_destroy(&pcdev->dev_mutex);
1004
1005 return 0;
1006 }
1007
1008 static struct platform_driver emmaprp_pdrv = {
1009 .probe = emmaprp_probe,
1010 .remove = emmaprp_remove,
1011 .driver = {
1012 .name = MEM2MEM_NAME,
1013 .owner = THIS_MODULE,
1014 },
1015 };
1016 module_platform_driver(emmaprp_pdrv);
1017