drivers/media/platform/blackfin/bfin_capture.c

   1 /*
   2  * Analog Devices video capture driver
   3  *
   4  * Copyright (c) 2011 Analog Devices Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/completion.h>
  21 #include <linux/delay.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/i2c.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/io.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/slab.h>
  32 #include <linux/time.h>
  33 #include <linux/types.h>
  34
  35 #include <media/v4l2-chip-ident.h>
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-ctrls.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ioctl.h>
  40 #include <media/videobuf2-dma-contig.h>
  41
  42 #include <asm/dma.h>
  43
  44 #include <media/blackfin/bfin_capture.h>
  45 #include <media/blackfin/ppi.h>
  46
  47 #define CAPTURE_DRV_NAME        "bfin_capture"
  48 #define BCAP_MIN_NUM_BUF        2
  49
  50 struct bcap_format {
  51         char *desc;
  52         u32 pixelformat;
  53         enum v4l2_mbus_pixelcode mbus_code;
  54         int bpp; /* bits per pixel */
  55 };
  56
  57 struct bcap_buffer {
  58         struct vb2_buffer vb;
  59         struct list_head list;
  60 };
  61
  62 struct bcap_device {
  63         /* capture device instance */
  64         struct v4l2_device v4l2_dev;
  65         /* v4l2 control handler */
  66         struct v4l2_ctrl_handler ctrl_handler;
  67         /* device node data */
  68         struct video_device *video_dev;
  69         /* sub device instance */
  70         struct v4l2_subdev *sd;
  71         /* capture config */
  72         struct bfin_capture_config *cfg;
  73         /* ppi interface */
  74         struct ppi_if *ppi;
  75         /* current input */
  76         unsigned int cur_input;
  77         /* current selected standard */
  78         v4l2_std_id std;
  79         /* used to store pixel format */
  80         struct v4l2_pix_format fmt;
  81         /* bits per pixel*/
  82         int bpp;
  83         /* used to store sensor supported format */
  84         struct bcap_format *sensor_formats;
  85         /* number of sensor formats array */
  86         int num_sensor_formats;
  87         /* pointing to current video buffer */
  88         struct bcap_buffer *cur_frm;
  89         /* pointing to next video buffer */
  90         struct bcap_buffer *next_frm;
  91         /* buffer queue used in videobuf2 */
  92         struct vb2_queue buffer_queue;
  93         /* allocator-specific contexts for each plane */
  94         struct vb2_alloc_ctx *alloc_ctx;
  95         /* queue of filled frames */
  96         struct list_head dma_queue;
  97         /* used in videobuf2 callback */
  98         spinlock_t lock;
  99         /* used to access capture device */
 100         struct mutex mutex;
 101         /* used to wait ppi to complete one transfer */
 102         struct completion comp;
 103         /* prepare to stop */
 104         bool stop;
 105 };
 106
 107 struct bcap_fh {
 108         struct v4l2_fh fh;
 109         /* indicates whether this file handle is doing IO */
 110         bool io_allowed;
 111 };
 112
 113 static const struct bcap_format bcap_formats[] = {
 114         {
 115                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 116                 .pixelformat = V4L2_PIX_FMT_UYVY,
 117                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
 118                 .bpp         = 16,
 119         },
 120         {
 121                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 122                 .pixelformat = V4L2_PIX_FMT_YUYV,
 123                 .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
 124                 .bpp         = 16,
 125         },
 126         {
 127                 .desc        = "RGB 565",
 128                 .pixelformat = V4L2_PIX_FMT_RGB565,
 129                 .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
 130                 .bpp         = 16,
 131         },
 132         {
 133                 .desc        = "RGB 444",
 134                 .pixelformat = V4L2_PIX_FMT_RGB444,
 135                 .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
 136                 .bpp         = 16,
 137         },
 138
 139 };
 140 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 141
 142 static irqreturn_t bcap_isr(int irq, void *dev_id);
 143
 144 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 145 {
 146         return container_of(vb, struct bcap_buffer, vb);
 147 }
 148
 149 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 150 {
 151         enum v4l2_mbus_pixelcode code;
 152         struct bcap_format *sf;
 153         unsigned int num_formats = 0;
 154         int i, j;
 155
 156         while (!v4l2_subdev_call(bcap_dev->sd, video,
 157                                 enum_mbus_fmt, num_formats, &code))
 158                 num_formats++;
 159         if (!num_formats)
 160                 return -ENXIO;
 161
 162         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 163         if (!sf)
 164                 return -ENOMEM;
 165
 166         for (i = 0; i < num_formats; i++) {
 167                 v4l2_subdev_call(bcap_dev->sd, video,
 168                                 enum_mbus_fmt, i, &code);
 169                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 170                         if (code == bcap_formats[j].mbus_code)
 171                                 break;
 172                 if (j == BCAP_MAX_FMTS) {
 173                         /* we don't allow this sensor working with our bridge */
 174                         kfree(sf);
 175                         return -EINVAL;
 176                 }
 177                 sf[i] = bcap_formats[j];
 178         }
 179         bcap_dev->sensor_formats = sf;
 180         bcap_dev->num_sensor_formats = num_formats;
 181         return 0;
 182 }
 183
 184 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 185 {
 186         bcap_dev->num_sensor_formats = 0;
 187         kfree(bcap_dev->sensor_formats);
 188         bcap_dev->sensor_formats = NULL;
 189 }
 190
 191 static int bcap_open(struct file *file)
 192 {
 193         struct bcap_device *bcap_dev = video_drvdata(file);
 194         struct video_device *vfd = bcap_dev->video_dev;
 195         struct bcap_fh *bcap_fh;
 196
 197         if (!bcap_dev->sd) {
 198                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
 199                 return -ENODEV;
 200         }
 201
 202         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
 203         if (!bcap_fh) {
 204                 v4l2_err(&bcap_dev->v4l2_dev,
 205                          "unable to allocate memory for file handle object\n");
 206                 return -ENOMEM;
 207         }
 208
 209         v4l2_fh_init(&bcap_fh->fh, vfd);
 210
 211         /* store pointer to v4l2_fh in private_data member of file */
 212         file->private_data = &bcap_fh->fh;
 213         v4l2_fh_add(&bcap_fh->fh);
 214         bcap_fh->io_allowed = false;
 215         return 0;
 216 }
 217
 218 static int bcap_release(struct file *file)
 219 {
 220         struct bcap_device *bcap_dev = video_drvdata(file);
 221         struct v4l2_fh *fh = file->private_data;
 222         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 223
 224         /* if this instance is doing IO */
 225         if (bcap_fh->io_allowed)
 226                 vb2_queue_release(&bcap_dev->buffer_queue);
 227
 228         file->private_data = NULL;
 229         v4l2_fh_del(&bcap_fh->fh);
 230         v4l2_fh_exit(&bcap_fh->fh);
 231         kfree(bcap_fh);
 232         return 0;
 233 }
 234
 235 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
 236 {
 237         struct bcap_device *bcap_dev = video_drvdata(file);
 238         int ret;
 239
 240         if (mutex_lock_interruptible(&bcap_dev->mutex))
 241                 return -ERESTARTSYS;
 242         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
 243         mutex_unlock(&bcap_dev->mutex);
 244         return ret;
 245 }
 246
 247 #ifndef CONFIG_MMU
 248 static unsigned long bcap_get_unmapped_area(struct file *file,
 249                                             unsigned long addr,
 250                                             unsigned long len,
 251                                             unsigned long pgoff,
 252                                             unsigned long flags)
 253 {
 254         struct bcap_device *bcap_dev = video_drvdata(file);
 255
 256         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
 257                                      addr,
 258                                      len,
 259                                      pgoff,
 260                                      flags);
 261 }
 262 #endif
 263
 264 static unsigned int bcap_poll(struct file *file, poll_table *wait)
 265 {
 266         struct bcap_device *bcap_dev = video_drvdata(file);
 267         unsigned int res;
 268
 269         mutex_lock(&bcap_dev->mutex);
 270         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
 271         mutex_unlock(&bcap_dev->mutex);
 272         return res;
 273 }
 274
 275 static int bcap_queue_setup(struct vb2_queue *vq,
 276                                 const struct v4l2_format *fmt,
 277                                 unsigned int *nbuffers, unsigned int *nplanes,
 278                                 unsigned int sizes[], void *alloc_ctxs[])
 279 {
 280         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 281
 282         if (*nbuffers < BCAP_MIN_NUM_BUF)
 283                 *nbuffers = BCAP_MIN_NUM_BUF;
 284
 285         *nplanes = 1;
 286         sizes[0] = bcap_dev->fmt.sizeimage;
 287         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 288
 289         return 0;
 290 }
 291
 292 static int bcap_buffer_init(struct vb2_buffer *vb)
 293 {
 294         struct bcap_buffer *buf = to_bcap_vb(vb);
 295
 296         INIT_LIST_HEAD(&buf->list);
 297         return 0;
 298 }
 299
 300 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 301 {
 302         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 303         struct bcap_buffer *buf = to_bcap_vb(vb);
 304         unsigned long size;
 305
 306         size = bcap_dev->fmt.sizeimage;
 307         if (vb2_plane_size(vb, 0) < size) {
 308                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 309                                 vb2_plane_size(vb, 0), size);
 310                 return -EINVAL;
 311         }
 312         vb2_set_plane_payload(&buf->vb, 0, size);
 313
 314         return 0;
 315 }
 316
 317 static void bcap_buffer_queue(struct vb2_buffer *vb)
 318 {
 319         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 320         struct bcap_buffer *buf = to_bcap_vb(vb);
 321         unsigned long flags;
 322
 323         spin_lock_irqsave(&bcap_dev->lock, flags);
 324         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 325         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 326 }
 327
 328 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 329 {
 330         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 331         struct bcap_buffer *buf = to_bcap_vb(vb);
 332         unsigned long flags;
 333
 334         spin_lock_irqsave(&bcap_dev->lock, flags);
 335         list_del_init(&buf->list);
 336         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 337 }
 338
 339 static void bcap_lock(struct vb2_queue *vq)
 340 {
 341         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 342         mutex_lock(&bcap_dev->mutex);
 343 }
 344
 345 static void bcap_unlock(struct vb2_queue *vq)
 346 {
 347         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 348         mutex_unlock(&bcap_dev->mutex);
 349 }
 350
 351 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 352 {
 353         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 354         struct ppi_if *ppi = bcap_dev->ppi;
 355         struct ppi_params params;
 356         int ret;
 357
 358         /* enable streamon on the sub device */
 359         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 360         if (ret && (ret != -ENOIOCTLCMD)) {
 361                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 362                 return ret;
 363         }
 364
 365         /* set ppi params */
 366         params.width = bcap_dev->fmt.width;
 367         params.height = bcap_dev->fmt.height;
 368         params.bpp = bcap_dev->bpp;
 369         params.ppi_control = bcap_dev->cfg->ppi_control;
 370         params.int_mask = bcap_dev->cfg->int_mask;
 371         params.blank_clocks = bcap_dev->cfg->blank_clocks;
 372         ret = ppi->ops->set_params(ppi, &params);
 373         if (ret < 0) {
 374                 v4l2_err(&bcap_dev->v4l2_dev,
 375                                 "Error in setting ppi params\n");
 376                 return ret;
 377         }
 378
 379         /* attach ppi DMA irq handler */
 380         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 381         if (ret < 0) {
 382                 v4l2_err(&bcap_dev->v4l2_dev,
 383                                 "Error in attaching interrupt handler\n");
 384                 return ret;
 385         }
 386
 387         INIT_COMPLETION(bcap_dev->comp);
 388         bcap_dev->stop = false;
 389         return 0;
 390 }
 391
 392 static int bcap_stop_streaming(struct vb2_queue *vq)
 393 {
 394         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 395         struct ppi_if *ppi = bcap_dev->ppi;
 396         int ret;
 397
 398         if (!vb2_is_streaming(vq))
 399                 return 0;
 400
 401         bcap_dev->stop = true;
 402         wait_for_completion(&bcap_dev->comp);
 403         ppi->ops->stop(ppi);
 404         ppi->ops->detach_irq(ppi);
 405         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 406         if (ret && (ret != -ENOIOCTLCMD))
 407                 v4l2_err(&bcap_dev->v4l2_dev,
 408                                 "stream off failed in subdev\n");
 409
 410         /* release all active buffers */
 411         while (!list_empty(&bcap_dev->dma_queue)) {
 412                 bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
 413                                                 struct bcap_buffer, list);
 414                 list_del(&bcap_dev->next_frm->list);
 415                 vb2_buffer_done(&bcap_dev->next_frm->vb, VB2_BUF_STATE_ERROR);
 416         }
 417         return 0;
 418 }
 419
 420 static struct vb2_ops bcap_video_qops = {
 421         .queue_setup            = bcap_queue_setup,
 422         .buf_init               = bcap_buffer_init,
 423         .buf_prepare            = bcap_buffer_prepare,
 424         .buf_cleanup            = bcap_buffer_cleanup,
 425         .buf_queue              = bcap_buffer_queue,
 426         .wait_prepare           = bcap_unlock,
 427         .wait_finish            = bcap_lock,
 428         .start_streaming        = bcap_start_streaming,
 429         .stop_streaming         = bcap_stop_streaming,
 430 };
 431
 432 static int bcap_reqbufs(struct file *file, void *priv,
 433                         struct v4l2_requestbuffers *req_buf)
 434 {
 435         struct bcap_device *bcap_dev = video_drvdata(file);
 436         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 437         struct v4l2_fh *fh = file->private_data;
 438         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 439
 440         if (vb2_is_busy(vq))
 441                 return -EBUSY;
 442
 443         bcap_fh->io_allowed = true;
 444
 445         return vb2_reqbufs(vq, req_buf);
 446 }
 447
 448 static int bcap_querybuf(struct file *file, void *priv,
 449                                 struct v4l2_buffer *buf)
 450 {
 451         struct bcap_device *bcap_dev = video_drvdata(file);
 452
 453         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 454 }
 455
 456 static int bcap_qbuf(struct file *file, void *priv,
 457                         struct v4l2_buffer *buf)
 458 {
 459         struct bcap_device *bcap_dev = video_drvdata(file);
 460         struct v4l2_fh *fh = file->private_data;
 461         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 462
 463         if (!bcap_fh->io_allowed)
 464                 return -EBUSY;
 465
 466         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 467 }
 468
 469 static int bcap_dqbuf(struct file *file, void *priv,
 470                         struct v4l2_buffer *buf)
 471 {
 472         struct bcap_device *bcap_dev = video_drvdata(file);
 473         struct v4l2_fh *fh = file->private_data;
 474         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 475
 476         if (!bcap_fh->io_allowed)
 477                 return -EBUSY;
 478
 479         return vb2_dqbuf(&bcap_dev->buffer_queue,
 480                                 buf, file->f_flags & O_NONBLOCK);
 481 }
 482
 483 static irqreturn_t bcap_isr(int irq, void *dev_id)
 484 {
 485         struct ppi_if *ppi = dev_id;
 486         struct bcap_device *bcap_dev = ppi->priv;
 487         struct timeval timevalue;
 488         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 489         dma_addr_t addr;
 490
 491         spin_lock(&bcap_dev->lock);
 492
 493         if (bcap_dev->cur_frm != bcap_dev->next_frm) {
 494                 do_gettimeofday(&timevalue);
 495                 vb->v4l2_buf.timestamp = timevalue;
 496                 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 497                 bcap_dev->cur_frm = bcap_dev->next_frm;
 498         }
 499
 500         ppi->ops->stop(ppi);
 501
 502         if (bcap_dev->stop) {
 503                 complete(&bcap_dev->comp);
 504         } else {
 505                 if (!list_empty(&bcap_dev->dma_queue)) {
 506                         bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
 507                                                 struct bcap_buffer, list);
 508                         list_del(&bcap_dev->next_frm->list);
 509                         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->next_frm->vb, 0);
 510                         ppi->ops->update_addr(ppi, (unsigned long)addr);
 511                 }
 512                 ppi->ops->start(ppi);
 513         }
 514
 515         spin_unlock(&bcap_dev->lock);
 516
 517         return IRQ_HANDLED;
 518 }
 519
 520 static int bcap_streamon(struct file *file, void *priv,
 521                                 enum v4l2_buf_type buf_type)
 522 {
 523         struct bcap_device *bcap_dev = video_drvdata(file);
 524         struct bcap_fh *fh = file->private_data;
 525         struct ppi_if *ppi = bcap_dev->ppi;
 526         dma_addr_t addr;
 527         int ret;
 528
 529         if (!fh->io_allowed)
 530                 return -EBUSY;
 531
 532         /* call streamon to start streaming in videobuf */
 533         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 534         if (ret)
 535                 return ret;
 536
 537         /* if dma queue is empty, return error */
 538         if (list_empty(&bcap_dev->dma_queue)) {
 539                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 540                 ret = -EINVAL;
 541                 goto err;
 542         }
 543
 544         /* get the next frame from the dma queue */
 545         bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
 546                                         struct bcap_buffer, list);
 547         bcap_dev->cur_frm = bcap_dev->next_frm;
 548         /* remove buffer from the dma queue */
 549         list_del(&bcap_dev->cur_frm->list);
 550         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 551         /* update DMA address */
 552         ppi->ops->update_addr(ppi, (unsigned long)addr);
 553         /* enable ppi */
 554         ppi->ops->start(ppi);
 555
 556         return 0;
 557 err:
 558         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 559         return ret;
 560 }
 561
 562 static int bcap_streamoff(struct file *file, void *priv,
 563                                 enum v4l2_buf_type buf_type)
 564 {
 565         struct bcap_device *bcap_dev = video_drvdata(file);
 566         struct bcap_fh *fh = file->private_data;
 567
 568         if (!fh->io_allowed)
 569                 return -EBUSY;
 570
 571         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 572 }
 573
 574 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 575 {
 576         struct bcap_device *bcap_dev = video_drvdata(file);
 577
 578         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 579 }
 580
 581 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 582 {
 583         struct bcap_device *bcap_dev = video_drvdata(file);
 584
 585         *std = bcap_dev->std;
 586         return 0;
 587 }
 588
 589 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id *std)
 590 {
 591         struct bcap_device *bcap_dev = video_drvdata(file);
 592         int ret;
 593
 594         if (vb2_is_busy(&bcap_dev->buffer_queue))
 595                 return -EBUSY;
 596
 597         ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std);
 598         if (ret < 0)
 599                 return ret;
 600
 601         bcap_dev->std = *std;
 602         return 0;
 603 }
 604
 605 static int bcap_enum_input(struct file *file, void *priv,
 606                                 struct v4l2_input *input)
 607 {
 608         struct bcap_device *bcap_dev = video_drvdata(file);
 609         struct bfin_capture_config *config = bcap_dev->cfg;
 610         int ret;
 611         u32 status;
 612
 613         if (input->index >= config->num_inputs)
 614                 return -EINVAL;
 615
 616         *input = config->inputs[input->index];
 617         /* get input status */
 618         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 619         if (!ret)
 620                 input->status = status;
 621         return 0;
 622 }
 623
 624 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 625 {
 626         struct bcap_device *bcap_dev = video_drvdata(file);
 627
 628         *index = bcap_dev->cur_input;
 629         return 0;
 630 }
 631
 632 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 633 {
 634         struct bcap_device *bcap_dev = video_drvdata(file);
 635         struct bfin_capture_config *config = bcap_dev->cfg;
 636         struct bcap_route *route;
 637         int ret;
 638
 639         if (vb2_is_busy(&bcap_dev->buffer_queue))
 640                 return -EBUSY;
 641
 642         if (index >= config->num_inputs)
 643                 return -EINVAL;
 644
 645         route = &config->routes[index];
 646         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 647                                 route->input, route->output, 0);
 648         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 649                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 650                 return ret;
 651         }
 652         bcap_dev->cur_input = index;
 653         return 0;
 654 }
 655
 656 static int bcap_try_format(struct bcap_device *bcap,
 657                                 struct v4l2_pix_format *pixfmt,
 658                                 enum v4l2_mbus_pixelcode *mbus_code,
 659                                 int *bpp)
 660 {
 661         struct bcap_format *sf = bcap->sensor_formats;
 662         struct bcap_format *fmt = NULL;
 663         struct v4l2_mbus_framefmt mbus_fmt;
 664         int ret, i;
 665
 666         for (i = 0; i < bcap->num_sensor_formats; i++) {
 667                 fmt = &sf[i];
 668                 if (pixfmt->pixelformat == fmt->pixelformat)
 669                         break;
 670         }
 671         if (i == bcap->num_sensor_formats)
 672                 fmt = &sf[0];
 673
 674         if (mbus_code)
 675                 *mbus_code = fmt->mbus_code;
 676         if (bpp)
 677                 *bpp = fmt->bpp;
 678         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 679         ret = v4l2_subdev_call(bcap->sd, video,
 680                                 try_mbus_fmt, &mbus_fmt);
 681         if (ret < 0)
 682                 return ret;
 683         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 684         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 685         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 686         return 0;
 687 }
 688
 689 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 690                                         struct v4l2_fmtdesc *fmt)
 691 {
 692         struct bcap_device *bcap_dev = video_drvdata(file);
 693         struct bcap_format *sf = bcap_dev->sensor_formats;
 694
 695         if (fmt->index >= bcap_dev->num_sensor_formats)
 696                 return -EINVAL;
 697
 698         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 699         strlcpy(fmt->description,
 700                 sf[fmt->index].desc,
 701                 sizeof(fmt->description));
 702         fmt->pixelformat = sf[fmt->index].pixelformat;
 703         return 0;
 704 }
 705
 706 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 707                                         struct v4l2_format *fmt)
 708 {
 709         struct bcap_device *bcap_dev = video_drvdata(file);
 710         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 711
 712         return bcap_try_format(bcap_dev, pixfmt, NULL, NULL);
 713 }
 714
 715 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 716                                 struct v4l2_format *fmt)
 717 {
 718         struct bcap_device *bcap_dev = video_drvdata(file);
 719
 720         fmt->fmt.pix = bcap_dev->fmt;
 721         return 0;
 722 }
 723
 724 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 725                                 struct v4l2_format *fmt)
 726 {
 727         struct bcap_device *bcap_dev = video_drvdata(file);
 728         struct v4l2_mbus_framefmt mbus_fmt;
 729         enum v4l2_mbus_pixelcode mbus_code;
 730         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 731         int ret, bpp;
 732
 733         if (vb2_is_busy(&bcap_dev->buffer_queue))
 734                 return -EBUSY;
 735
 736         /* see if format works */
 737         ret = bcap_try_format(bcap_dev, pixfmt, &mbus_code, &bpp);
 738         if (ret < 0)
 739                 return ret;
 740
 741         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, mbus_code);
 742         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 743         if (ret < 0)
 744                 return ret;
 745         bcap_dev->fmt = *pixfmt;
 746         bcap_dev->bpp = bpp;
 747         return 0;
 748 }
 749
 750 static int bcap_querycap(struct file *file, void  *priv,
 751                                 struct v4l2_capability *cap)
 752 {
 753         struct bcap_device *bcap_dev = video_drvdata(file);
 754
 755         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 756         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 757         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 758         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 759         return 0;
 760 }
 761
 762 static int bcap_g_parm(struct file *file, void *fh,
 763                                 struct v4l2_streamparm *a)
 764 {
 765         struct bcap_device *bcap_dev = video_drvdata(file);
 766
 767         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 768                 return -EINVAL;
 769         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 770 }
 771
 772 static int bcap_s_parm(struct file *file, void *fh,
 773                                 struct v4l2_streamparm *a)
 774 {
 775         struct bcap_device *bcap_dev = video_drvdata(file);
 776
 777         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 778                 return -EINVAL;
 779         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 780 }
 781
 782 static int bcap_g_chip_ident(struct file *file, void *priv,
 783                 struct v4l2_dbg_chip_ident *chip)
 784 {
 785         struct bcap_device *bcap_dev = video_drvdata(file);
 786
 787         chip->ident = V4L2_IDENT_NONE;
 788         chip->revision = 0;
 789         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
 790                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 791                 return -EINVAL;
 792
 793         return v4l2_subdev_call(bcap_dev->sd, core,
 794                         g_chip_ident, chip);
 795 }
 796
 797 #ifdef CONFIG_VIDEO_ADV_DEBUG
 798 static int bcap_dbg_g_register(struct file *file, void *priv,
 799                 struct v4l2_dbg_register *reg)
 800 {
 801         struct bcap_device *bcap_dev = video_drvdata(file);
 802
 803         return v4l2_subdev_call(bcap_dev->sd, core,
 804                         g_register, reg);
 805 }
 806
 807 static int bcap_dbg_s_register(struct file *file, void *priv,
 808                 struct v4l2_dbg_register *reg)
 809 {
 810         struct bcap_device *bcap_dev = video_drvdata(file);
 811
 812         return v4l2_subdev_call(bcap_dev->sd, core,
 813                         s_register, reg);
 814 }
 815 #endif
 816
 817 static int bcap_log_status(struct file *file, void *priv)
 818 {
 819         struct bcap_device *bcap_dev = video_drvdata(file);
 820         /* status for sub devices */
 821         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 822         return 0;
 823 }
 824
 825 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 826         .vidioc_querycap         = bcap_querycap,
 827         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 828         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 829         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 830         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 831         .vidioc_enum_input       = bcap_enum_input,
 832         .vidioc_g_input          = bcap_g_input,
 833         .vidioc_s_input          = bcap_s_input,
 834         .vidioc_querystd         = bcap_querystd,
 835         .vidioc_s_std            = bcap_s_std,
 836         .vidioc_g_std            = bcap_g_std,
 837         .vidioc_reqbufs          = bcap_reqbufs,
 838         .vidioc_querybuf         = bcap_querybuf,
 839         .vidioc_qbuf             = bcap_qbuf,
 840         .vidioc_dqbuf            = bcap_dqbuf,
 841         .vidioc_streamon         = bcap_streamon,
 842         .vidioc_streamoff        = bcap_streamoff,
 843         .vidioc_g_parm           = bcap_g_parm,
 844         .vidioc_s_parm           = bcap_s_parm,
 845         .vidioc_g_chip_ident     = bcap_g_chip_ident,
 846 #ifdef CONFIG_VIDEO_ADV_DEBUG
 847         .vidioc_g_register       = bcap_dbg_g_register,
 848         .vidioc_s_register       = bcap_dbg_s_register,
 849 #endif
 850         .vidioc_log_status       = bcap_log_status,
 851 };
 852
 853 static struct v4l2_file_operations bcap_fops = {
 854         .owner = THIS_MODULE,
 855         .open = bcap_open,
 856         .release = bcap_release,
 857         .unlocked_ioctl = video_ioctl2,
 858         .mmap = bcap_mmap,
 859 #ifndef CONFIG_MMU
 860         .get_unmapped_area = bcap_get_unmapped_area,
 861 #endif
 862         .poll = bcap_poll
 863 };
 864
 865 static int __devinit bcap_probe(struct platform_device *pdev)
 866 {
 867         struct bcap_device *bcap_dev;
 868         struct video_device *vfd;
 869         struct i2c_adapter *i2c_adap;
 870         struct bfin_capture_config *config;
 871         struct vb2_queue *q;
 872         int ret;
 873
 874         config = pdev->dev.platform_data;
 875         if (!config) {
 876                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 877                 return -ENODEV;
 878         }
 879
 880         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 881         if (!bcap_dev) {
 882                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 883                 return -ENOMEM;
 884         }
 885
 886         bcap_dev->cfg = config;
 887
 888         bcap_dev->ppi = ppi_create_instance(config->ppi_info);
 889         if (!bcap_dev->ppi) {
 890                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 891                 ret = -ENODEV;
 892                 goto err_free_dev;
 893         }
 894         bcap_dev->ppi->priv = bcap_dev;
 895
 896         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 897         if (IS_ERR(bcap_dev->alloc_ctx)) {
 898                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 899                 goto err_free_ppi;
 900         }
 901
 902         vfd = video_device_alloc();
 903         if (!vfd) {
 904                 ret = -ENOMEM;
 905                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 906                 goto err_cleanup_ctx;
 907         }
 908
 909         /* initialize field of video device */
 910         vfd->release            = video_device_release;
 911         vfd->fops               = &bcap_fops;
 912         vfd->ioctl_ops          = &bcap_ioctl_ops;
 913         vfd->tvnorms            = 0;
 914         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 915         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
 916         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 917         bcap_dev->video_dev     = vfd;
 918
 919         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 920         if (ret) {
 921                 v4l2_err(pdev->dev.driver,
 922                                 "Unable to register v4l2 device\n");
 923                 goto err_release_vdev;
 924         }
 925         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 926
 927         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 928         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 929         if (ret) {
 930                 v4l2_err(&bcap_dev->v4l2_dev,
 931                                 "Unable to init control handler\n");
 932                 goto err_unreg_v4l2;
 933         }
 934
 935         spin_lock_init(&bcap_dev->lock);
 936         /* initialize queue */
 937         q = &bcap_dev->buffer_queue;
 938         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 939         q->io_modes = VB2_MMAP;
 940         q->drv_priv = bcap_dev;
 941         q->buf_struct_size = sizeof(struct bcap_buffer);
 942         q->ops = &bcap_video_qops;
 943         q->mem_ops = &vb2_dma_contig_memops;
 944
 945         vb2_queue_init(q);
 946
 947         mutex_init(&bcap_dev->mutex);
 948         init_completion(&bcap_dev->comp);
 949
 950         /* init video dma queues */
 951         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 952
 953         vfd->lock = &bcap_dev->mutex;
 954
 955         /* register video device */
 956         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 957         if (ret) {
 958                 v4l2_err(&bcap_dev->v4l2_dev,
 959                                 "Unable to register video device\n");
 960                 goto err_free_handler;
 961         }
 962         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
 963         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 964                         video_device_node_name(vfd));
 965
 966         /* load up the subdevice */
 967         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 968         if (!i2c_adap) {
 969                 v4l2_err(&bcap_dev->v4l2_dev,
 970                                 "Unable to find i2c adapter\n");
 971                 ret = -ENODEV;
 972                 goto err_unreg_vdev;
 973
 974         }
 975         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 976                                                  i2c_adap,
 977                                                  &config->board_info,
 978                                                  NULL);
 979         if (bcap_dev->sd) {
 980                 int i;
 981                 /* update tvnorms from the sub devices */
 982                 for (i = 0; i < config->num_inputs; i++)
 983                         vfd->tvnorms |= config->inputs[i].std;
 984         } else {
 985                 v4l2_err(&bcap_dev->v4l2_dev,
 986                                 "Unable to register sub device\n");
 987                 goto err_unreg_vdev;
 988         }
 989
 990         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 991
 992         /* now we can probe the default state */
 993         if (vfd->tvnorms) {
 994                 v4l2_std_id std;
 995                 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
 996                 if (ret) {
 997                         v4l2_err(&bcap_dev->v4l2_dev,
 998                                         "Unable to get std\n");
 999                         goto err_unreg_vdev;
1000                 }
1001                 bcap_dev->std = std;
1002         }
1003         ret = bcap_init_sensor_formats(bcap_dev);
1004         if (ret) {
1005                 v4l2_err(&bcap_dev->v4l2_dev,
1006                                 "Unable to create sensor formats table\n");
1007                 goto err_unreg_vdev;
1008         }
1009         return 0;
1010 err_unreg_vdev:
1011         video_unregister_device(bcap_dev->video_dev);
1012         bcap_dev->video_dev = NULL;
1013 err_free_handler:
1014         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1015 err_unreg_v4l2:
1016         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1017 err_release_vdev:
1018         if (bcap_dev->video_dev)
1019                 video_device_release(bcap_dev->video_dev);
1020 err_cleanup_ctx:
1021         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1022 err_free_ppi:
1023         ppi_delete_instance(bcap_dev->ppi);
1024 err_free_dev:
1025         kfree(bcap_dev);
1026         return ret;
1027 }
1028
1029 static int __devexit bcap_remove(struct platform_device *pdev)
1030 {
1031         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1032         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1033                                                 struct bcap_device, v4l2_dev);
1034
1035         bcap_free_sensor_formats(bcap_dev);
1036         video_unregister_device(bcap_dev->video_dev);
1037         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1038         v4l2_device_unregister(v4l2_dev);
1039         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1040         ppi_delete_instance(bcap_dev->ppi);
1041         kfree(bcap_dev);
1042         return 0;
1043 }
1044
1045 static struct platform_driver bcap_driver = {
1046         .driver = {
1047                 .name  = CAPTURE_DRV_NAME,
1048                 .owner = THIS_MODULE,
1049         },
1050         .probe = bcap_probe,
1051         .remove = __devexit_p(bcap_remove),
1052 };
1053 module_platform_driver(bcap_driver);
1054
1055 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1056 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1057 MODULE_LICENSE("GPL v2");