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 };
215
216 struct emmaprp_ctx {
217 struct emmaprp_dev *dev;
218 /* Abort requested by m2m */
219 int aborting;
220 struct emmaprp_q_data q_data[2];
221 struct v4l2_m2m_ctx *m2m_ctx;
222 };
223
get_q_data(struct emmaprp_ctx * ctx,enum v4l2_buf_type type)224 static 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 * mem2mem callbacks
240 */
emmaprp_job_abort(void * priv)241 static 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
emmaprp_lock(void * priv)253 static 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
emmaprp_unlock(void * priv)260 static 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
emmaprp_dump_regs(struct emmaprp_dev * pcdev)267 static 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
emmaprp_device_run(void * priv)287 static 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_v4l2_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->vb2_buf, 0);
312 p_out = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_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 /* Input frame parameters */
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 /* Output frame parameters */
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 /* IRQ configuration */
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 /* Enable transfer */
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
emmaprp_irq(int irq_emma,void * data)349 static 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 /* Check irq flags and clear irq */
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) { /* buffer ready */
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 * video ioctls
398 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)399 static 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
enum_fmt(struct v4l2_fmtdesc * f,u32 type)409 static 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 /* index-th format of type type found ? */
419 if (num == f->index)
420 break;
421 /* Correct type but haven't reached our index yet,
422 * just increment per-type index */
423 ++num;
424 }
425 }
426
427 if (i < NUM_FORMATS) {
428 /* Format found */
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 /* Format not found */
436 return -EINVAL;
437 }
438
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)439 static 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
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)445 static 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
vidioc_g_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)451 static 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 /* YUYV */
469 f->fmt.pix.bytesperline = q_data->width * 2;
470 f->fmt.pix.sizeimage = q_data->sizeimage;
471
472 return 0;
473 }
474
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)475 static 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
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)481 static 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
vidioc_try_fmt(struct v4l2_format * f)487 static 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 /* V4L2 specification suggests the driver corrects the format struct
502 * if any of the dimensions is unsupported */
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
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)521 static 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
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)538 static 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
vidioc_s_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)555 static 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 /* YUYV */
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
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)593 static 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
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)605 static 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
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * reqbufs)617 static 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
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * buf)625 static 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
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * buf)633 static 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
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * buf)640 static 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
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type type)647 static 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
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type type)655 static 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
663 static 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 * Queue operations
689 */
emmaprp_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])690 static 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
emmaprp_buf_prepare(struct vb2_buffer * vb)717 static 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,
728 "%s data will not fit into plane(%lu < %lu)\n",
729 __func__, 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
emmaprp_buf_queue(struct vb2_buffer * vb)739 static 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
746 static 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
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)752 static 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 * File operations
785 */
emmaprp_open(struct file * file)786 static 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
emmaprp_release(struct file * file)824 static 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
emmaprp_poll(struct file * file,struct poll_table_struct * wait)841 static 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
emmaprp_mmap(struct file * file,struct vm_area_struct * vma)854 static 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
867 static 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
876 static const 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
885 static const 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
emmaprp_probe(struct platform_device * pdev)892 static 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 if (irq < 0)
946 return irq;
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->m2m_dev = v4l2_m2m_init(&m2m_ops);
953 if (IS_ERR(pcdev->m2m_dev)) {
954 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
955 ret = PTR_ERR(pcdev->m2m_dev);
956 goto rel_vdev;
957 }
958
959 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
960 if (ret) {
961 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
962 goto rel_m2m;
963 }
964
965 return 0;
966
967
968 rel_m2m:
969 v4l2_m2m_release(pcdev->m2m_dev);
970 rel_vdev:
971 video_device_release(vfd);
972 unreg_dev:
973 v4l2_device_unregister(&pcdev->v4l2_dev);
974
975 mutex_destroy(&pcdev->dev_mutex);
976
977 return ret;
978 }
979
emmaprp_remove(struct platform_device * pdev)980 static int emmaprp_remove(struct platform_device *pdev)
981 {
982 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
983
984 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
985
986 video_unregister_device(pcdev->vfd);
987 v4l2_m2m_release(pcdev->m2m_dev);
988 v4l2_device_unregister(&pcdev->v4l2_dev);
989 mutex_destroy(&pcdev->dev_mutex);
990
991 return 0;
992 }
993
994 static struct platform_driver emmaprp_pdrv = {
995 .probe = emmaprp_probe,
996 .remove = emmaprp_remove,
997 .driver = {
998 .name = MEM2MEM_NAME,
999 },
1000 };
1001 module_platform_driver(emmaprp_pdrv);
1002