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 34MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs"); 35MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); 36MODULE_LICENSE("GPL"); 37MODULE_VERSION("0.0.1"); 38 39static bool debug; 40module_param(debug, bool, 0644); 41 42#define MIN_W 32 43#define MIN_H 32 44#define MAX_W 2040 45#define MAX_H 2046 46 47#define S_ALIGN 1 /* 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 151struct emmaprp_fmt { 152 char *name; 153 u32 fourcc; 154 /* Types the format can be used for */ 155 u32 types; 156}; 157 158static struct emmaprp_fmt formats[] = { 159 { 160 .name = "YUV 4:2:0 Planar", 161 .fourcc = V4L2_PIX_FMT_YUV420, 162 .types = MEM2MEM_CAPTURE, 163 }, 164 { 165 .name = "4:2:2, packed, YUYV", 166 .fourcc = V4L2_PIX_FMT_YUYV, 167 .types = MEM2MEM_OUTPUT, 168 }, 169}; 170 171/* Per-queue, driver-specific private data */ 172struct emmaprp_q_data { 173 unsigned int width; 174 unsigned int height; 175 unsigned int sizeimage; 176 struct emmaprp_fmt *fmt; 177}; 178 179enum { 180 V4L2_M2M_SRC = 0, 181 V4L2_M2M_DST = 1, 182}; 183 184#define NUM_FORMATS ARRAY_SIZE(formats) 185 186static struct emmaprp_fmt *find_format(struct v4l2_format *f) 187{ 188 struct emmaprp_fmt *fmt; 189 unsigned int k; 190 191 for (k = 0; k < NUM_FORMATS; k++) { 192 fmt = &formats[k]; 193 if (fmt->fourcc == f->fmt.pix.pixelformat) 194 break; 195 } 196 197 if (k == NUM_FORMATS) 198 return NULL; 199 200 return &formats[k]; 201} 202 203struct emmaprp_dev { 204 struct v4l2_device v4l2_dev; 205 struct video_device *vfd; 206 207 struct mutex dev_mutex; 208 spinlock_t irqlock; 209 210 void __iomem *base_emma; 211 struct clk *clk_emma_ahb, *clk_emma_ipg; 212 213 struct v4l2_m2m_dev *m2m_dev; 214 struct vb2_alloc_ctx *alloc_ctx; 215}; 216 217struct 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 225static 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 */ 242static 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 254static 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 261static 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 268static 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 288static 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 350static 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 */ 400static 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 410static 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 440static 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 446static 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 452static 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 476static 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 482static 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 488static 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 522static 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 539static 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 556static 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 594static 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 606static 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 618static 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 626static 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 634static 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 641static 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 648static 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 656static 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 664static 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 */ 691static int emmaprp_queue_setup(struct vb2_queue *vq, 692 const struct v4l2_format *fmt, 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 721static 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 743static void emmaprp_buf_queue(struct vb2_buffer *vb) 744{ 745 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 746 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); 747} 748 749static struct vb2_ops emmaprp_qops = { 750 .queue_setup = emmaprp_queue_setup, 751 .buf_prepare = emmaprp_buf_prepare, 752 .buf_queue = emmaprp_buf_queue, 753}; 754 755static int queue_init(void *priv, struct vb2_queue *src_vq, 756 struct vb2_queue *dst_vq) 757{ 758 struct emmaprp_ctx *ctx = priv; 759 int ret; 760 761 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 762 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 763 src_vq->drv_priv = ctx; 764 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 765 src_vq->ops = &emmaprp_qops; 766 src_vq->mem_ops = &vb2_dma_contig_memops; 767 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 768 769 ret = vb2_queue_init(src_vq); 770 if (ret) 771 return ret; 772 773 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 774 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; 775 dst_vq->drv_priv = ctx; 776 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 777 dst_vq->ops = &emmaprp_qops; 778 dst_vq->mem_ops = &vb2_dma_contig_memops; 779 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 780 781 return vb2_queue_init(dst_vq); 782} 783 784/* 785 * File operations 786 */ 787static int emmaprp_open(struct file *file) 788{ 789 struct emmaprp_dev *pcdev = video_drvdata(file); 790 struct emmaprp_ctx *ctx; 791 792 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 793 if (!ctx) 794 return -ENOMEM; 795 796 file->private_data = ctx; 797 ctx->dev = pcdev; 798 799 if (mutex_lock_interruptible(&pcdev->dev_mutex)) { 800 kfree(ctx); 801 return -ERESTARTSYS; 802 } 803 804 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 805 806 if (IS_ERR(ctx->m2m_ctx)) { 807 int ret = PTR_ERR(ctx->m2m_ctx); 808 809 mutex_unlock(&pcdev->dev_mutex); 810 kfree(ctx); 811 return ret; 812 } 813 814 clk_prepare_enable(pcdev->clk_emma_ipg); 815 clk_prepare_enable(pcdev->clk_emma_ahb); 816 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1]; 817 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0]; 818 mutex_unlock(&pcdev->dev_mutex); 819 820 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); 821 822 return 0; 823} 824 825static int emmaprp_release(struct file *file) 826{ 827 struct emmaprp_dev *pcdev = video_drvdata(file); 828 struct emmaprp_ctx *ctx = file->private_data; 829 830 dprintk(pcdev, "Releasing instance %p\n", ctx); 831 832 mutex_lock(&pcdev->dev_mutex); 833 clk_disable_unprepare(pcdev->clk_emma_ahb); 834 clk_disable_unprepare(pcdev->clk_emma_ipg); 835 v4l2_m2m_ctx_release(ctx->m2m_ctx); 836 mutex_unlock(&pcdev->dev_mutex); 837 kfree(ctx); 838 839 return 0; 840} 841 842static unsigned int emmaprp_poll(struct file *file, 843 struct poll_table_struct *wait) 844{ 845 struct emmaprp_dev *pcdev = video_drvdata(file); 846 struct emmaprp_ctx *ctx = file->private_data; 847 unsigned int res; 848 849 mutex_lock(&pcdev->dev_mutex); 850 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 851 mutex_unlock(&pcdev->dev_mutex); 852 return res; 853} 854 855static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma) 856{ 857 struct emmaprp_dev *pcdev = video_drvdata(file); 858 struct emmaprp_ctx *ctx = file->private_data; 859 int ret; 860 861 if (mutex_lock_interruptible(&pcdev->dev_mutex)) 862 return -ERESTARTSYS; 863 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 864 mutex_unlock(&pcdev->dev_mutex); 865 return ret; 866} 867 868static const struct v4l2_file_operations emmaprp_fops = { 869 .owner = THIS_MODULE, 870 .open = emmaprp_open, 871 .release = emmaprp_release, 872 .poll = emmaprp_poll, 873 .unlocked_ioctl = video_ioctl2, 874 .mmap = emmaprp_mmap, 875}; 876 877static struct video_device emmaprp_videodev = { 878 .name = MEM2MEM_NAME, 879 .fops = &emmaprp_fops, 880 .ioctl_ops = &emmaprp_ioctl_ops, 881 .minor = -1, 882 .release = video_device_release, 883 .vfl_dir = VFL_DIR_M2M, 884}; 885 886static struct v4l2_m2m_ops m2m_ops = { 887 .device_run = emmaprp_device_run, 888 .job_abort = emmaprp_job_abort, 889 .lock = emmaprp_lock, 890 .unlock = emmaprp_unlock, 891}; 892 893static int emmaprp_probe(struct platform_device *pdev) 894{ 895 struct emmaprp_dev *pcdev; 896 struct video_device *vfd; 897 struct resource *res; 898 int irq, ret; 899 900 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL); 901 if (!pcdev) 902 return -ENOMEM; 903 904 spin_lock_init(&pcdev->irqlock); 905 906 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg"); 907 if (IS_ERR(pcdev->clk_emma_ipg)) { 908 return PTR_ERR(pcdev->clk_emma_ipg); 909 } 910 911 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb"); 912 if (IS_ERR(pcdev->clk_emma_ahb)) 913 return PTR_ERR(pcdev->clk_emma_ahb); 914 915 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 916 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res); 917 if (IS_ERR(pcdev->base_emma)) 918 return PTR_ERR(pcdev->base_emma); 919 920 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 921 if (ret) 922 return ret; 923 924 mutex_init(&pcdev->dev_mutex); 925 926 vfd = video_device_alloc(); 927 if (!vfd) { 928 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); 929 ret = -ENOMEM; 930 goto unreg_dev; 931 } 932 933 *vfd = emmaprp_videodev; 934 vfd->lock = &pcdev->dev_mutex; 935 vfd->v4l2_dev = &pcdev->v4l2_dev; 936 937 video_set_drvdata(vfd, pcdev); 938 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name); 939 pcdev->vfd = vfd; 940 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME 941 " Device registered as /dev/video%d\n", vfd->num); 942 943 platform_set_drvdata(pdev, pcdev); 944 945 irq = platform_get_irq(pdev, 0); 946 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0, 947 dev_name(&pdev->dev), pcdev); 948 if (ret) 949 goto rel_vdev; 950 951 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); 952 if (IS_ERR(pcdev->alloc_ctx)) { 953 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); 954 ret = PTR_ERR(pcdev->alloc_ctx); 955 goto rel_vdev; 956 } 957 958 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); 959 if (IS_ERR(pcdev->m2m_dev)) { 960 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); 961 ret = PTR_ERR(pcdev->m2m_dev); 962 goto rel_ctx; 963 } 964 965 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); 966 if (ret) { 967 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); 968 goto rel_m2m; 969 } 970 971 return 0; 972 973 974rel_m2m: 975 v4l2_m2m_release(pcdev->m2m_dev); 976rel_ctx: 977 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 978rel_vdev: 979 video_device_release(vfd); 980unreg_dev: 981 v4l2_device_unregister(&pcdev->v4l2_dev); 982 983 mutex_destroy(&pcdev->dev_mutex); 984 985 return ret; 986} 987 988static int emmaprp_remove(struct platform_device *pdev) 989{ 990 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev); 991 992 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME); 993 994 video_unregister_device(pcdev->vfd); 995 v4l2_m2m_release(pcdev->m2m_dev); 996 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 997 v4l2_device_unregister(&pcdev->v4l2_dev); 998 mutex_destroy(&pcdev->dev_mutex); 999 1000 return 0; 1001} 1002 1003static struct platform_driver emmaprp_pdrv = { 1004 .probe = emmaprp_probe, 1005 .remove = emmaprp_remove, 1006 .driver = { 1007 .name = MEM2MEM_NAME, 1008 }, 1009}; 1010module_platform_driver(emmaprp_pdrv); 1011