drivers/media/video/s5p-fimc/fimc-capture.c

   1 /*
   2  * Samsung S5P SoC series camera interface (camera capture) driver
   3  *
   4  * Copyright (c) 2010 Samsung Electronics Co., Ltd
   5  * Author: Sylwester Nawrocki, <s.nawrocki@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/version.h>
  15 #include <linux/types.h>
  16 #include <linux/errno.h>
  17 #include <linux/bug.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/device.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/list.h>
  22 #include <linux/slab.h>
  23 #include <linux/clk.h>
  24 #include <linux/i2c.h>
  25
  26 #include <linux/videodev2.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/v4l2-ioctl.h>
  29 #include <media/v4l2-mem2mem.h>
  30 #include <media/videobuf2-core.h>
  31 #include <media/videobuf2-dma-contig.h>
  32
  33 #include "fimc-core.h"
  34
  35 static struct v4l2_subdev *fimc_subdev_register(struct fimc_dev *fimc,
  36                                             struct s5p_fimc_isp_info *isp_info)
  37 {
  38         struct i2c_adapter *i2c_adap;
  39         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
  40         struct v4l2_subdev *sd = NULL;
  41
  42         i2c_adap = i2c_get_adapter(isp_info->i2c_bus_num);
  43         if (!i2c_adap)
  44                 return ERR_PTR(-ENOMEM);
  45
  46         sd = v4l2_i2c_new_subdev_board(&vid_cap->v4l2_dev, i2c_adap,
  47                                        isp_info->board_info, NULL);
  48         if (!sd) {
  49                 v4l2_err(&vid_cap->v4l2_dev, "failed to acquire subdev\n");
  50                 return NULL;
  51         }
  52
  53         v4l2_info(&vid_cap->v4l2_dev, "subdevice %s registered successfuly\n",
  54                 isp_info->board_info->type);
  55
  56         return sd;
  57 }
  58
  59 static void fimc_subdev_unregister(struct fimc_dev *fimc)
  60 {
  61         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
  62         struct i2c_client *client;
  63
  64         if (vid_cap->input_index < 0)
  65                 return; /* Subdevice already released or not registered. */
  66
  67         if (vid_cap->sd) {
  68                 v4l2_device_unregister_subdev(vid_cap->sd);
  69                 client = v4l2_get_subdevdata(vid_cap->sd);
  70                 i2c_unregister_device(client);
  71                 i2c_put_adapter(client->adapter);
  72                 vid_cap->sd = NULL;
  73         }
  74
  75         vid_cap->input_index = -1;
  76 }
  77
  78 /**
  79  * fimc_subdev_attach - attach v4l2_subdev to camera host interface
  80  *
  81  * @fimc: FIMC device information
  82  * @index: index to the array of available subdevices,
  83  *         -1 for full array search or non negative value
  84  *         to select specific subdevice
  85  */
  86 static int fimc_subdev_attach(struct fimc_dev *fimc, int index)
  87 {
  88         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
  89         struct s5p_platform_fimc *pdata = fimc->pdata;
  90         struct s5p_fimc_isp_info *isp_info;
  91         struct v4l2_subdev *sd;
  92         int i;
  93
  94         for (i = 0; i < pdata->num_clients; ++i) {
  95                 isp_info = &pdata->isp_info[i];
  96
  97                 if (index >= 0 && i != index)
  98                         continue;
  99
 100                 sd = fimc_subdev_register(fimc, isp_info);
 101                 if (!IS_ERR_OR_NULL(sd)) {
 102                         vid_cap->sd = sd;
 103                         vid_cap->input_index = i;
 104
 105                         return 0;
 106                 }
 107         }
 108
 109         vid_cap->input_index = -1;
 110         vid_cap->sd = NULL;
 111         v4l2_err(&vid_cap->v4l2_dev, "fimc%d: sensor attach failed\n",
 112                  fimc->id);
 113         return -ENODEV;
 114 }
 115
 116 static int fimc_isp_subdev_init(struct fimc_dev *fimc, unsigned int index)
 117 {
 118         struct s5p_fimc_isp_info *isp_info;
 119         struct s5p_platform_fimc *pdata = fimc->pdata;
 120         int ret;
 121
 122         if (index >= pdata->num_clients)
 123                 return -EINVAL;
 124
 125         isp_info = &pdata->isp_info[index];
 126
 127         if (isp_info->clk_frequency)
 128                 clk_set_rate(fimc->clock[CLK_CAM], isp_info->clk_frequency);
 129
 130         ret = clk_enable(fimc->clock[CLK_CAM]);
 131         if (ret)
 132                 return ret;
 133
 134         ret = fimc_subdev_attach(fimc, index);
 135         if (ret)
 136                 return ret;
 137
 138         ret = fimc_hw_set_camera_polarity(fimc, isp_info);
 139         if (ret)
 140                 return ret;
 141
 142         ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 1);
 143         if (!ret)
 144                 return ret;
 145
 146         /* enabling power failed so unregister subdev */
 147         fimc_subdev_unregister(fimc);
 148
 149         v4l2_err(&fimc->vid_cap.v4l2_dev, "ISP initialization failed: %d\n",
 150                  ret);
 151
 152         return ret;
 153 }
 154
 155 static int fimc_stop_capture(struct fimc_dev *fimc)
 156 {
 157         unsigned long flags;
 158         struct fimc_vid_cap *cap;
 159         struct fimc_vid_buffer *buf;
 160
 161         cap = &fimc->vid_cap;
 162
 163         if (!fimc_capture_active(fimc))
 164                 return 0;
 165
 166         spin_lock_irqsave(&fimc->slock, flags);
 167         set_bit(ST_CAPT_SHUT, &fimc->state);
 168         fimc_deactivate_capture(fimc);
 169         spin_unlock_irqrestore(&fimc->slock, flags);
 170
 171         wait_event_timeout(fimc->irq_queue,
 172                            !test_bit(ST_CAPT_SHUT, &fimc->state),
 173                            FIMC_SHUTDOWN_TIMEOUT);
 174
 175         v4l2_subdev_call(cap->sd, video, s_stream, 0);
 176
 177         spin_lock_irqsave(&fimc->slock, flags);
 178         fimc->state &= ~(1 << ST_CAPT_RUN | 1 << ST_CAPT_PEND |
 179                          1 << ST_CAPT_SHUT | 1 << ST_CAPT_STREAM);
 180
 181         fimc->vid_cap.active_buf_cnt = 0;
 182
 183         /* Release buffers that were enqueued in the driver by videobuf2. */
 184         while (!list_empty(&cap->pending_buf_q)) {
 185                 buf = pending_queue_pop(cap);
 186                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 187         }
 188
 189         while (!list_empty(&cap->active_buf_q)) {
 190                 buf = active_queue_pop(cap);
 191                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 192         }
 193
 194         spin_unlock_irqrestore(&fimc->slock, flags);
 195
 196         dbg("state: 0x%lx", fimc->state);
 197         return 0;
 198 }
 199
 200 static int start_streaming(struct vb2_queue *q)
 201 {
 202         struct fimc_ctx *ctx = q->drv_priv;
 203         struct fimc_dev *fimc = ctx->fimc_dev;
 204         struct s5p_fimc_isp_info *isp_info;
 205         int ret;
 206
 207         fimc_hw_reset(fimc);
 208
 209         ret = v4l2_subdev_call(fimc->vid_cap.sd, video, s_stream, 1);
 210         if (ret && ret != -ENOIOCTLCMD)
 211                 return ret;
 212
 213         ret = fimc_prepare_config(ctx, ctx->state);
 214         if (ret)
 215                 return ret;
 216
 217         isp_info = &fimc->pdata->isp_info[fimc->vid_cap.input_index];
 218         fimc_hw_set_camera_type(fimc, isp_info);
 219         fimc_hw_set_camera_source(fimc, isp_info);
 220         fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
 221
 222         if (ctx->state & FIMC_PARAMS) {
 223                 ret = fimc_set_scaler_info(ctx);
 224                 if (ret) {
 225                         err("Scaler setup error");
 226                         return ret;
 227                 }
 228                 fimc_hw_set_input_path(ctx);
 229                 fimc_hw_set_prescaler(ctx);
 230                 fimc_hw_set_mainscaler(ctx);
 231                 fimc_hw_set_target_format(ctx);
 232                 fimc_hw_set_rotation(ctx);
 233                 fimc_hw_set_effect(ctx);
 234         }
 235
 236         fimc_hw_set_output_path(ctx);
 237         fimc_hw_set_out_dma(ctx);
 238
 239         INIT_LIST_HEAD(&fimc->vid_cap.pending_buf_q);
 240         INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
 241         fimc->vid_cap.active_buf_cnt = 0;
 242         fimc->vid_cap.frame_count = 0;
 243         fimc->vid_cap.buf_index = 0;
 244
 245         set_bit(ST_CAPT_PEND, &fimc->state);
 246
 247         return 0;
 248 }
 249
 250 static int stop_streaming(struct vb2_queue *q)
 251 {
 252         struct fimc_ctx *ctx = q->drv_priv;
 253         struct fimc_dev *fimc = ctx->fimc_dev;
 254
 255         if (!fimc_capture_active(fimc))
 256                 return -EINVAL;
 257
 258         return fimc_stop_capture(fimc);
 259 }
 260
 261 static unsigned int get_plane_size(struct fimc_frame *fr, unsigned int plane)
 262 {
 263         if (!fr || plane >= fr->fmt->memplanes)
 264                 return 0;
 265
 266         dbg("%s: w: %d. h: %d. depth[%d]: %d",
 267             __func__, fr->width, fr->height, plane, fr->fmt->depth[plane]);
 268
 269         return fr->f_width * fr->f_height * fr->fmt->depth[plane] / 8;
 270
 271 }
 272
 273 static int queue_setup(struct vb2_queue *vq, unsigned int *num_buffers,
 274                        unsigned int *num_planes, unsigned long sizes[],
 275                        void *allocators[])
 276 {
 277         struct fimc_ctx *ctx = vq->drv_priv;
 278         struct fimc_fmt *fmt = ctx->d_frame.fmt;
 279         int i;
 280
 281         if (!fmt)
 282                 return -EINVAL;
 283
 284         *num_planes = fmt->memplanes;
 285
 286         dbg("%s, buffer count=%d, plane count=%d",
 287             __func__, *num_buffers, *num_planes);
 288
 289         for (i = 0; i < fmt->memplanes; i++) {
 290                 sizes[i] = get_plane_size(&ctx->d_frame, i);
 291                 dbg("plane: %u, plane_size: %lu", i, sizes[i]);
 292                 allocators[i] = ctx->fimc_dev->alloc_ctx;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int buffer_init(struct vb2_buffer *vb)
 299 {
 300         /* TODO: */
 301         return 0;
 302 }
 303
 304 static int buffer_prepare(struct vb2_buffer *vb)
 305 {
 306         struct vb2_queue *vq = vb->vb2_queue;
 307         struct fimc_ctx *ctx = vq->drv_priv;
 308         struct v4l2_device *v4l2_dev = &ctx->fimc_dev->m2m.v4l2_dev;
 309         int i;
 310
 311         if (!ctx->d_frame.fmt || vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 312                 return -EINVAL;
 313
 314         for (i = 0; i < ctx->d_frame.fmt->memplanes; i++) {
 315                 unsigned long size = get_plane_size(&ctx->d_frame, i);
 316
 317                 if (vb2_plane_size(vb, i) < size) {
 318                         v4l2_err(v4l2_dev, "User buffer too small (%ld < %ld)\n",
 319                                  vb2_plane_size(vb, i), size);
 320                         return -EINVAL;
 321                 }
 322
 323                 vb2_set_plane_payload(vb, i, size);
 324         }
 325
 326         return 0;
 327 }
 328
 329 static void buffer_queue(struct vb2_buffer *vb)
 330 {
 331         struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 332         struct fimc_dev *fimc = ctx->fimc_dev;
 333         struct fimc_vid_buffer *buf
 334                 = container_of(vb, struct fimc_vid_buffer, vb);
 335         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
 336         unsigned long flags;
 337         int min_bufs;
 338
 339         spin_lock_irqsave(&fimc->slock, flags);
 340         fimc_prepare_addr(ctx, &buf->vb, &ctx->d_frame, &buf->paddr);
 341
 342         if (!test_bit(ST_CAPT_STREAM, &fimc->state)
 343              && vid_cap->active_buf_cnt < FIMC_MAX_OUT_BUFS) {
 344                 /* Setup the buffer directly for processing. */
 345                 int buf_id = (vid_cap->reqbufs_count == 1) ? -1 :
 346                                 vid_cap->buf_index;
 347
 348                 fimc_hw_set_output_addr(fimc, &buf->paddr, buf_id);
 349                 buf->index = vid_cap->buf_index;
 350                 active_queue_add(vid_cap, buf);
 351
 352                 if (++vid_cap->buf_index >= FIMC_MAX_OUT_BUFS)
 353                         vid_cap->buf_index = 0;
 354         } else {
 355                 fimc_pending_queue_add(vid_cap, buf);
 356         }
 357
 358         min_bufs = vid_cap->reqbufs_count > 1 ? 2 : 1;
 359
 360         if (vid_cap->active_buf_cnt >= min_bufs &&
 361             !test_and_set_bit(ST_CAPT_STREAM, &fimc->state))
 362                 fimc_activate_capture(ctx);
 363
 364         spin_unlock_irqrestore(&fimc->slock, flags);
 365 }
 366
 367 static void fimc_lock(struct vb2_queue *vq)
 368 {
 369         struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
 370         mutex_lock(&ctx->fimc_dev->lock);
 371 }
 372
 373 static void fimc_unlock(struct vb2_queue *vq)
 374 {
 375         struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
 376         mutex_unlock(&ctx->fimc_dev->lock);
 377 }
 378
 379 static struct vb2_ops fimc_capture_qops = {
 380         .queue_setup            = queue_setup,
 381         .buf_prepare            = buffer_prepare,
 382         .buf_queue              = buffer_queue,
 383         .buf_init               = buffer_init,
 384         .wait_prepare           = fimc_unlock,
 385         .wait_finish            = fimc_lock,
 386         .start_streaming        = start_streaming,
 387         .stop_streaming         = stop_streaming,
 388 };
 389
 390 static int fimc_capture_open(struct file *file)
 391 {
 392         struct fimc_dev *fimc = video_drvdata(file);
 393         int ret = 0;
 394
 395         dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
 396
 397         /* Return if the corresponding video mem2mem node is already opened. */
 398         if (fimc_m2m_active(fimc))
 399                 return -EBUSY;
 400
 401         if (++fimc->vid_cap.refcnt == 1) {
 402                 ret = fimc_isp_subdev_init(fimc, 0);
 403                 if (ret) {
 404                         fimc->vid_cap.refcnt--;
 405                         return -EIO;
 406                 }
 407         }
 408
 409         file->private_data = fimc->vid_cap.ctx;
 410
 411         return 0;
 412 }
 413
 414 static int fimc_capture_close(struct file *file)
 415 {
 416         struct fimc_dev *fimc = video_drvdata(file);
 417
 418         dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
 419
 420         if (--fimc->vid_cap.refcnt == 0) {
 421                 fimc_stop_capture(fimc);
 422                 vb2_queue_release(&fimc->vid_cap.vbq);
 423
 424                 v4l2_err(&fimc->vid_cap.v4l2_dev, "releasing ISP\n");
 425
 426                 v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
 427                 clk_disable(fimc->clock[CLK_CAM]);
 428                 fimc_subdev_unregister(fimc);
 429         }
 430
 431         return 0;
 432 }
 433
 434 static unsigned int fimc_capture_poll(struct file *file,
 435                                       struct poll_table_struct *wait)
 436 {
 437         struct fimc_ctx *ctx = file->private_data;
 438         struct fimc_dev *fimc = ctx->fimc_dev;
 439
 440         return vb2_poll(&fimc->vid_cap.vbq, file, wait);
 441 }
 442
 443 static int fimc_capture_mmap(struct file *file, struct vm_area_struct *vma)
 444 {
 445         struct fimc_ctx *ctx = file->private_data;
 446         struct fimc_dev *fimc = ctx->fimc_dev;
 447
 448         return vb2_mmap(&fimc->vid_cap.vbq, vma);
 449 }
 450
 451 /* video device file operations */
 452 static const struct v4l2_file_operations fimc_capture_fops = {
 453         .owner          = THIS_MODULE,
 454         .open           = fimc_capture_open,
 455         .release        = fimc_capture_close,
 456         .poll           = fimc_capture_poll,
 457         .unlocked_ioctl = video_ioctl2,
 458         .mmap           = fimc_capture_mmap,
 459 };
 460
 461 static int fimc_vidioc_querycap_capture(struct file *file, void *priv,
 462                                         struct v4l2_capability *cap)
 463 {
 464         struct fimc_ctx *ctx = file->private_data;
 465         struct fimc_dev *fimc = ctx->fimc_dev;
 466
 467         strncpy(cap->driver, fimc->pdev->name, sizeof(cap->driver) - 1);
 468         strncpy(cap->card, fimc->pdev->name, sizeof(cap->card) - 1);
 469         cap->bus_info[0] = 0;
 470         cap->version = KERNEL_VERSION(1, 0, 0);
 471         cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE |
 472                             V4L2_CAP_VIDEO_CAPTURE_MPLANE;
 473
 474         return 0;
 475 }
 476
 477 /* Synchronize formats of the camera interface input and attached  sensor. */
 478 static int sync_capture_fmt(struct fimc_ctx *ctx)
 479 {
 480         struct fimc_frame *frame = &ctx->s_frame;
 481         struct fimc_dev *fimc = ctx->fimc_dev;
 482         struct v4l2_mbus_framefmt *fmt = &fimc->vid_cap.fmt;
 483         int ret;
 484
 485         fmt->width  = ctx->d_frame.o_width;
 486         fmt->height = ctx->d_frame.o_height;
 487
 488         ret = v4l2_subdev_call(fimc->vid_cap.sd, video, s_mbus_fmt, fmt);
 489         if (ret == -ENOIOCTLCMD) {
 490                 err("s_mbus_fmt failed");
 491                 return ret;
 492         }
 493         dbg("w: %d, h: %d, code= %d", fmt->width, fmt->height, fmt->code);
 494
 495         frame->fmt = find_mbus_format(fmt, FMT_FLAGS_CAM);
 496         if (!frame->fmt) {
 497                 err("fimc source format not found\n");
 498                 return -EINVAL;
 499         }
 500
 501         frame->f_width  = fmt->width;
 502         frame->f_height = fmt->height;
 503         frame->width    = fmt->width;
 504         frame->height   = fmt->height;
 505         frame->o_width  = fmt->width;
 506         frame->o_height = fmt->height;
 507         frame->offs_h   = 0;
 508         frame->offs_v   = 0;
 509
 510         return 0;
 511 }
 512
 513 static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
 514                                  struct v4l2_format *f)
 515 {
 516         struct fimc_ctx *ctx = priv;
 517         struct fimc_dev *fimc = ctx->fimc_dev;
 518         struct fimc_frame *frame;
 519         struct v4l2_pix_format_mplane *pix;
 520         int ret;
 521         int i;
 522
 523         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 524                 return -EINVAL;
 525
 526         ret = fimc_vidioc_try_fmt_mplane(file, priv, f);
 527         if (ret)
 528                 return ret;
 529
 530         if (vb2_is_streaming(&fimc->vid_cap.vbq) || fimc_capture_active(fimc))
 531                 return -EBUSY;
 532
 533         frame = &ctx->d_frame;
 534
 535         pix = &f->fmt.pix_mp;
 536         frame->fmt = find_format(f, FMT_FLAGS_M2M | FMT_FLAGS_CAM);
 537         if (!frame->fmt) {
 538                 err("fimc target format not found\n");
 539                 return -EINVAL;
 540         }
 541
 542         for (i = 0; i < frame->fmt->colplanes; i++)
 543                 frame->payload[i] = pix->plane_fmt[i].bytesperline * pix->height;
 544
 545         /* Output DMA frame pixel size and offsets. */
 546         frame->f_width = pix->plane_fmt[0].bytesperline * 8
 547                         / frame->fmt->depth[0];
 548         frame->f_height = pix->height;
 549         frame->width    = pix->width;
 550         frame->height   = pix->height;
 551         frame->o_width  = pix->width;
 552         frame->o_height = pix->height;
 553         frame->offs_h   = 0;
 554         frame->offs_v   = 0;
 555
 556         ctx->state |= (FIMC_PARAMS | FIMC_DST_FMT);
 557
 558         ret = sync_capture_fmt(ctx);
 559         return ret;
 560 }
 561
 562 static int fimc_cap_enum_input(struct file *file, void *priv,
 563                                      struct v4l2_input *i)
 564 {
 565         struct fimc_ctx *ctx = priv;
 566         struct s5p_platform_fimc *pldata = ctx->fimc_dev->pdata;
 567         struct s5p_fimc_isp_info *isp_info;
 568
 569         if (i->index >= pldata->num_clients)
 570                 return -EINVAL;
 571
 572         isp_info = &pldata->isp_info[i->index];
 573
 574         i->type = V4L2_INPUT_TYPE_CAMERA;
 575         strncpy(i->name, isp_info->board_info->type, 32);
 576         return 0;
 577 }
 578
 579 static int fimc_cap_s_input(struct file *file, void *priv,
 580                                   unsigned int i)
 581 {
 582         struct fimc_ctx *ctx = priv;
 583         struct fimc_dev *fimc = ctx->fimc_dev;
 584         struct s5p_platform_fimc *pdata = fimc->pdata;
 585
 586         if (fimc_capture_active(ctx->fimc_dev))
 587                 return -EBUSY;
 588
 589         if (i >= pdata->num_clients)
 590                 return -EINVAL;
 591
 592
 593         if (fimc->vid_cap.sd) {
 594                 int ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
 595                 if (ret)
 596                         err("s_power failed: %d", ret);
 597
 598                 clk_disable(fimc->clock[CLK_CAM]);
 599         }
 600
 601         /* Release the attached sensor subdevice. */
 602         fimc_subdev_unregister(fimc);
 603
 604         return fimc_isp_subdev_init(fimc, i);
 605 }
 606
 607 static int fimc_cap_g_input(struct file *file, void *priv,
 608                                        unsigned int *i)
 609 {
 610         struct fimc_ctx *ctx = priv;
 611         struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
 612
 613         *i = cap->input_index;
 614         return 0;
 615 }
 616
 617 static int fimc_cap_streamon(struct file *file, void *priv,
 618                              enum v4l2_buf_type type)
 619 {
 620         struct fimc_ctx *ctx = priv;
 621         struct fimc_dev *fimc = ctx->fimc_dev;
 622
 623         if (fimc_capture_active(fimc) || !fimc->vid_cap.sd)
 624                 return -EBUSY;
 625
 626         if (!(ctx->state & FIMC_DST_FMT)) {
 627                 v4l2_err(&fimc->vid_cap.v4l2_dev, "Format is not set\n");
 628                 return -EINVAL;
 629         }
 630
 631         return vb2_streamon(&fimc->vid_cap.vbq, type);
 632 }
 633
 634 static int fimc_cap_streamoff(struct file *file, void *priv,
 635                             enum v4l2_buf_type type)
 636 {
 637         struct fimc_ctx *ctx = priv;
 638         struct fimc_dev *fimc = ctx->fimc_dev;
 639
 640         return vb2_streamoff(&fimc->vid_cap.vbq, type);
 641 }
 642
 643 static int fimc_cap_reqbufs(struct file *file, void *priv,
 644                             struct v4l2_requestbuffers *reqbufs)
 645 {
 646         struct fimc_ctx *ctx = priv;
 647         struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
 648         int ret;
 649
 650
 651         ret = vb2_reqbufs(&cap->vbq, reqbufs);
 652         if (!ret)
 653                 cap->reqbufs_count = reqbufs->count;
 654
 655         return ret;
 656 }
 657
 658 static int fimc_cap_querybuf(struct file *file, void *priv,
 659                            struct v4l2_buffer *buf)
 660 {
 661         struct fimc_ctx *ctx = priv;
 662         struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
 663
 664         return vb2_querybuf(&cap->vbq, buf);
 665 }
 666
 667 static int fimc_cap_qbuf(struct file *file, void *priv,
 668                           struct v4l2_buffer *buf)
 669 {
 670         struct fimc_ctx *ctx = priv;
 671         struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
 672         return vb2_qbuf(&cap->vbq, buf);
 673 }
 674
 675 static int fimc_cap_dqbuf(struct file *file, void *priv,
 676                            struct v4l2_buffer *buf)
 677 {
 678         struct fimc_ctx *ctx = priv;
 679         return vb2_dqbuf(&ctx->fimc_dev->vid_cap.vbq, buf,
 680                 file->f_flags & O_NONBLOCK);
 681 }
 682
 683 static int fimc_cap_s_ctrl(struct file *file, void *priv,
 684                          struct v4l2_control *ctrl)
 685 {
 686         struct fimc_ctx *ctx = priv;
 687         int ret = -EINVAL;
 688
 689         /* Allow any controls but 90/270 rotation while streaming */
 690         if (!fimc_capture_active(ctx->fimc_dev) ||
 691             ctrl->id != V4L2_CID_ROTATE ||
 692             (ctrl->value != 90 && ctrl->value != 270)) {
 693                 ret = check_ctrl_val(ctx, ctrl);
 694                 if (!ret) {
 695                         ret = fimc_s_ctrl(ctx, ctrl);
 696                         if (!ret)
 697                                 ctx->state |= FIMC_PARAMS;
 698                 }
 699         }
 700         if (ret == -EINVAL)
 701                 ret = v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
 702                                        core, s_ctrl, ctrl);
 703         return ret;
 704 }
 705
 706 static int fimc_cap_cropcap(struct file *file, void *fh,
 707                             struct v4l2_cropcap *cr)
 708 {
 709         struct fimc_frame *f;
 710         struct fimc_ctx *ctx = fh;
 711
 712         if (cr->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 713                 return -EINVAL;
 714
 715         f = &ctx->s_frame;
 716
 717         cr->bounds.left         = 0;
 718         cr->bounds.top          = 0;
 719         cr->bounds.width        = f->o_width;
 720         cr->bounds.height       = f->o_height;
 721         cr->defrect             = cr->bounds;
 722
 723         return 0;
 724 }
 725
 726 static int fimc_cap_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
 727 {
 728         struct fimc_frame *f;
 729         struct fimc_ctx *ctx = file->private_data;
 730
 731         f = &ctx->s_frame;
 732
 733         cr->c.left      = f->offs_h;
 734         cr->c.top       = f->offs_v;
 735         cr->c.width     = f->width;
 736         cr->c.height    = f->height;
 737
 738         return 0;
 739 }
 740
 741 static int fimc_cap_s_crop(struct file *file, void *fh,
 742                                struct v4l2_crop *cr)
 743 {
 744         struct fimc_frame *f;
 745         struct fimc_ctx *ctx = file->private_data;
 746         struct fimc_dev *fimc = ctx->fimc_dev;
 747         int ret = -EINVAL;
 748
 749         if (fimc_capture_active(fimc))
 750                 return -EBUSY;
 751
 752         ret = fimc_try_crop(ctx, cr);
 753         if (ret)
 754                 return ret;
 755
 756         if (!(ctx->state & FIMC_DST_FMT)) {
 757                 v4l2_err(&fimc->vid_cap.v4l2_dev,
 758                          "Capture color format not set\n");
 759                 return -EINVAL; /* TODO: make sure this is the right value */
 760         }
 761
 762         f = &ctx->s_frame;
 763         /* Check for the pixel scaling ratio when cropping input image. */
 764         ret = fimc_check_scaler_ratio(cr->c.width, cr->c.height,
 765                                       ctx->d_frame.width, ctx->d_frame.height,
 766                                       ctx->rotation);
 767         if (ret) {
 768                 v4l2_err(&fimc->vid_cap.v4l2_dev, "Out of the scaler range\n");
 769                 return ret;
 770         }
 771
 772         f->offs_h = cr->c.left;
 773         f->offs_v = cr->c.top;
 774         f->width  = cr->c.width;
 775         f->height = cr->c.height;
 776
 777         return 0;
 778 }
 779
 780
 781 static const struct v4l2_ioctl_ops fimc_capture_ioctl_ops = {
 782         .vidioc_querycap                = fimc_vidioc_querycap_capture,
 783
 784         .vidioc_enum_fmt_vid_cap_mplane = fimc_vidioc_enum_fmt_mplane,
 785         .vidioc_try_fmt_vid_cap_mplane  = fimc_vidioc_try_fmt_mplane,
 786         .vidioc_s_fmt_vid_cap_mplane    = fimc_cap_s_fmt_mplane,
 787         .vidioc_g_fmt_vid_cap_mplane    = fimc_vidioc_g_fmt_mplane,
 788
 789         .vidioc_reqbufs                 = fimc_cap_reqbufs,
 790         .vidioc_querybuf                = fimc_cap_querybuf,
 791
 792         .vidioc_qbuf                    = fimc_cap_qbuf,
 793         .vidioc_dqbuf                   = fimc_cap_dqbuf,
 794
 795         .vidioc_streamon                = fimc_cap_streamon,
 796         .vidioc_streamoff               = fimc_cap_streamoff,
 797
 798         .vidioc_queryctrl               = fimc_vidioc_queryctrl,
 799         .vidioc_g_ctrl                  = fimc_vidioc_g_ctrl,
 800         .vidioc_s_ctrl                  = fimc_cap_s_ctrl,
 801
 802         .vidioc_g_crop                  = fimc_cap_g_crop,
 803         .vidioc_s_crop                  = fimc_cap_s_crop,
 804         .vidioc_cropcap                 = fimc_cap_cropcap,
 805
 806         .vidioc_enum_input              = fimc_cap_enum_input,
 807         .vidioc_s_input                 = fimc_cap_s_input,
 808         .vidioc_g_input                 = fimc_cap_g_input,
 809 };
 810
 811 /* fimc->lock must be already initialized */
 812 int fimc_register_capture_device(struct fimc_dev *fimc)
 813 {
 814         struct v4l2_device *v4l2_dev = &fimc->vid_cap.v4l2_dev;
 815         struct video_device *vfd;
 816         struct fimc_vid_cap *vid_cap;
 817         struct fimc_ctx *ctx;
 818         struct v4l2_format f;
 819         struct fimc_frame *fr;
 820         struct vb2_queue *q;
 821         int ret;
 822
 823         ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
 824         if (!ctx)
 825                 return -ENOMEM;
 826
 827         ctx->fimc_dev    = fimc;
 828         ctx->in_path     = FIMC_CAMERA;
 829         ctx->out_path    = FIMC_DMA;
 830         ctx->state       = FIMC_CTX_CAP;
 831
 832         /* Default format of the output frames */
 833         f.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB32;
 834         fr = &ctx->d_frame;
 835         fr->fmt = find_format(&f, FMT_FLAGS_M2M);
 836         fr->width = fr->f_width = fr->o_width = 640;
 837         fr->height = fr->f_height = fr->o_height = 480;
 838
 839         if (!v4l2_dev->name[0])
 840                 snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
 841                          "%s.capture", dev_name(&fimc->pdev->dev));
 842
 843         ret = v4l2_device_register(NULL, v4l2_dev);
 844         if (ret)
 845                 goto err_info;
 846
 847         vfd = video_device_alloc();
 848         if (!vfd) {
 849                 v4l2_err(v4l2_dev, "Failed to allocate video device\n");
 850                 goto err_v4l2_reg;
 851         }
 852
 853         snprintf(vfd->name, sizeof(vfd->name), "%s:cap",
 854                  dev_name(&fimc->pdev->dev));
 855
 856         vfd->fops       = &fimc_capture_fops;
 857         vfd->ioctl_ops  = &fimc_capture_ioctl_ops;
 858         vfd->minor      = -1;
 859         vfd->release    = video_device_release;
 860         vfd->lock       = &fimc->lock;
 861         video_set_drvdata(vfd, fimc);
 862
 863         vid_cap = &fimc->vid_cap;
 864         vid_cap->vfd = vfd;
 865         vid_cap->active_buf_cnt = 0;
 866         vid_cap->reqbufs_count  = 0;
 867         vid_cap->refcnt = 0;
 868         /* Default color format for image sensor */
 869         vid_cap->fmt.code = V4L2_MBUS_FMT_YUYV8_2X8;
 870
 871         INIT_LIST_HEAD(&vid_cap->pending_buf_q);
 872         INIT_LIST_HEAD(&vid_cap->active_buf_q);
 873         spin_lock_init(&ctx->slock);
 874         vid_cap->ctx = ctx;
 875
 876         q = &fimc->vid_cap.vbq;
 877         memset(q, 0, sizeof(*q));
 878         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 879         q->io_modes = VB2_MMAP | VB2_USERPTR;
 880         q->drv_priv = fimc->vid_cap.ctx;
 881         q->ops = &fimc_capture_qops;
 882         q->mem_ops = &vb2_dma_contig_memops;
 883         q->buf_struct_size = sizeof(struct fimc_vid_buffer);
 884
 885         vb2_queue_init(q);
 886
 887         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
 888         if (ret) {
 889                 v4l2_err(v4l2_dev, "Failed to register video device\n");
 890                 goto err_vd_reg;
 891         }
 892
 893         v4l2_info(v4l2_dev,
 894                   "FIMC capture driver registered as /dev/video%d\n",
 895                   vfd->num);
 896
 897         return 0;
 898
 899 err_vd_reg:
 900         video_device_release(vfd);
 901 err_v4l2_reg:
 902         v4l2_device_unregister(v4l2_dev);
 903 err_info:
 904         dev_err(&fimc->pdev->dev, "failed to install\n");
 905         return ret;
 906 }
 907
 908 void fimc_unregister_capture_device(struct fimc_dev *fimc)
 909 {
 910         struct fimc_vid_cap *capture = &fimc->vid_cap;
 911
 912         if (capture->vfd)
 913                 video_unregister_device(capture->vfd);
 914
 915         kfree(capture->ctx);
 916 }