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-common.h>
  36 #include <media/v4l2-ctrls.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-ioctl.h>
  39 #include <media/videobuf2-dma-contig.h>
  40
  41 #include <asm/dma.h>
  42
  43 #include <media/blackfin/bfin_capture.h>
  44 #include <media/blackfin/ppi.h>
  45
  46 #define CAPTURE_DRV_NAME        "bfin_capture"
  47 #define BCAP_MIN_NUM_BUF        2
  48
  49 struct bcap_format {
  50         char *desc;
  51         u32 pixelformat;
  52         u32 mbus_code;
  53         int bpp; /* bits per pixel */
  54         int dlen; /* data length for ppi in bits */
  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         /* current selected dv_timings */
  80         struct v4l2_dv_timings dv_timings;
  81         /* used to store pixel format */
  82         struct v4l2_pix_format fmt;
  83         /* bits per pixel*/
  84         int bpp;
  85         /* data length for ppi in bits */
  86         int dlen;
  87         /* used to store sensor supported format */
  88         struct bcap_format *sensor_formats;
  89         /* number of sensor formats array */
  90         int num_sensor_formats;
  91         /* pointing to current video buffer */
  92         struct bcap_buffer *cur_frm;
  93         /* buffer queue used in videobuf2 */
  94         struct vb2_queue buffer_queue;
  95         /* allocator-specific contexts for each plane */
  96         struct vb2_alloc_ctx *alloc_ctx;
  97         /* queue of filled frames */
  98         struct list_head dma_queue;
  99         /* used in videobuf2 callback */
 100         spinlock_t lock;
 101         /* used to access capture device */
 102         struct mutex mutex;
 103         /* used to wait ppi to complete one transfer */
 104         struct completion comp;
 105         /* prepare to stop */
 106         bool stop;
 107 };
 108
 109 struct bcap_fh {
 110         struct v4l2_fh fh;
 111         /* indicates whether this file handle is doing IO */
 112         bool io_allowed;
 113 };
 114
 115 static const struct bcap_format bcap_formats[] = {
 116         {
 117                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 118                 .pixelformat = V4L2_PIX_FMT_UYVY,
 119                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 120                 .bpp         = 16,
 121                 .dlen        = 8,
 122         },
 123         {
 124                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 125                 .pixelformat = V4L2_PIX_FMT_YUYV,
 126                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 127                 .bpp         = 16,
 128                 .dlen        = 8,
 129         },
 130         {
 131                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 132                 .pixelformat = V4L2_PIX_FMT_UYVY,
 133                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 134                 .bpp         = 16,
 135                 .dlen        = 16,
 136         },
 137         {
 138                 .desc        = "RGB 565",
 139                 .pixelformat = V4L2_PIX_FMT_RGB565,
 140                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 141                 .bpp         = 16,
 142                 .dlen        = 8,
 143         },
 144         {
 145                 .desc        = "RGB 444",
 146                 .pixelformat = V4L2_PIX_FMT_RGB444,
 147                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 148                 .bpp         = 16,
 149                 .dlen        = 8,
 150         },
 151
 152 };
 153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 154
 155 static irqreturn_t bcap_isr(int irq, void *dev_id);
 156
 157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 158 {
 159         return container_of(vb, struct bcap_buffer, vb);
 160 }
 161
 162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 163 {
 164         u32 code;
 165         struct bcap_format *sf;
 166         unsigned int num_formats = 0;
 167         int i, j;
 168
 169         while (!v4l2_subdev_call(bcap_dev->sd, video,
 170                                 enum_mbus_fmt, num_formats, &code))
 171                 num_formats++;
 172         if (!num_formats)
 173                 return -ENXIO;
 174
 175         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 176         if (!sf)
 177                 return -ENOMEM;
 178
 179         for (i = 0; i < num_formats; i++) {
 180                 v4l2_subdev_call(bcap_dev->sd, video,
 181                                 enum_mbus_fmt, i, &code);
 182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 183                         if (code == bcap_formats[j].mbus_code)
 184                                 break;
 185                 if (j == BCAP_MAX_FMTS) {
 186                         /* we don't allow this sensor working with our bridge */
 187                         kfree(sf);
 188                         return -EINVAL;
 189                 }
 190                 sf[i] = bcap_formats[j];
 191         }
 192         bcap_dev->sensor_formats = sf;
 193         bcap_dev->num_sensor_formats = num_formats;
 194         return 0;
 195 }
 196
 197 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 198 {
 199         bcap_dev->num_sensor_formats = 0;
 200         kfree(bcap_dev->sensor_formats);
 201         bcap_dev->sensor_formats = NULL;
 202 }
 203
 204 static int bcap_open(struct file *file)
 205 {
 206         struct bcap_device *bcap_dev = video_drvdata(file);
 207         struct video_device *vfd = bcap_dev->video_dev;
 208         struct bcap_fh *bcap_fh;
 209
 210         if (!bcap_dev->sd) {
 211                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
 212                 return -ENODEV;
 213         }
 214
 215         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
 216         if (!bcap_fh) {
 217                 v4l2_err(&bcap_dev->v4l2_dev,
 218                          "unable to allocate memory for file handle object\n");
 219                 return -ENOMEM;
 220         }
 221
 222         v4l2_fh_init(&bcap_fh->fh, vfd);
 223
 224         /* store pointer to v4l2_fh in private_data member of file */
 225         file->private_data = &bcap_fh->fh;
 226         v4l2_fh_add(&bcap_fh->fh);
 227         bcap_fh->io_allowed = false;
 228         return 0;
 229 }
 230
 231 static int bcap_release(struct file *file)
 232 {
 233         struct bcap_device *bcap_dev = video_drvdata(file);
 234         struct v4l2_fh *fh = file->private_data;
 235         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 236
 237         /* if this instance is doing IO */
 238         if (bcap_fh->io_allowed)
 239                 vb2_queue_release(&bcap_dev->buffer_queue);
 240
 241         file->private_data = NULL;
 242         v4l2_fh_del(&bcap_fh->fh);
 243         v4l2_fh_exit(&bcap_fh->fh);
 244         kfree(bcap_fh);
 245         return 0;
 246 }
 247
 248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
 249 {
 250         struct bcap_device *bcap_dev = video_drvdata(file);
 251         int ret;
 252
 253         if (mutex_lock_interruptible(&bcap_dev->mutex))
 254                 return -ERESTARTSYS;
 255         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
 256         mutex_unlock(&bcap_dev->mutex);
 257         return ret;
 258 }
 259
 260 #ifndef CONFIG_MMU
 261 static unsigned long bcap_get_unmapped_area(struct file *file,
 262                                             unsigned long addr,
 263                                             unsigned long len,
 264                                             unsigned long pgoff,
 265                                             unsigned long flags)
 266 {
 267         struct bcap_device *bcap_dev = video_drvdata(file);
 268
 269         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
 270                                      addr,
 271                                      len,
 272                                      pgoff,
 273                                      flags);
 274 }
 275 #endif
 276
 277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
 278 {
 279         struct bcap_device *bcap_dev = video_drvdata(file);
 280         unsigned int res;
 281
 282         mutex_lock(&bcap_dev->mutex);
 283         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
 284         mutex_unlock(&bcap_dev->mutex);
 285         return res;
 286 }
 287
 288 static int bcap_queue_setup(struct vb2_queue *vq,
 289                                 const struct v4l2_format *fmt,
 290                                 unsigned int *nbuffers, unsigned int *nplanes,
 291                                 unsigned int sizes[], void *alloc_ctxs[])
 292 {
 293         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 294
 295         if (*nbuffers < BCAP_MIN_NUM_BUF)
 296                 *nbuffers = BCAP_MIN_NUM_BUF;
 297
 298         *nplanes = 1;
 299         sizes[0] = bcap_dev->fmt.sizeimage;
 300         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 301
 302         return 0;
 303 }
 304
 305 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 306 {
 307         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 308         struct bcap_buffer *buf = to_bcap_vb(vb);
 309         unsigned long size;
 310
 311         size = bcap_dev->fmt.sizeimage;
 312         if (vb2_plane_size(vb, 0) < size) {
 313                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 314                                 vb2_plane_size(vb, 0), size);
 315                 return -EINVAL;
 316         }
 317         vb2_set_plane_payload(&buf->vb, 0, size);
 318
 319         return 0;
 320 }
 321
 322 static void bcap_buffer_queue(struct vb2_buffer *vb)
 323 {
 324         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 325         struct bcap_buffer *buf = to_bcap_vb(vb);
 326         unsigned long flags;
 327
 328         spin_lock_irqsave(&bcap_dev->lock, flags);
 329         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 330         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 331 }
 332
 333 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 334 {
 335         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 336         struct bcap_buffer *buf = to_bcap_vb(vb);
 337         unsigned long flags;
 338
 339         spin_lock_irqsave(&bcap_dev->lock, flags);
 340         list_del_init(&buf->list);
 341         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 342 }
 343
 344 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 345 {
 346         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 347         struct ppi_if *ppi = bcap_dev->ppi;
 348         struct bcap_buffer *buf, *tmp;
 349         struct ppi_params params;
 350         int ret;
 351
 352         /* enable streamon on the sub device */
 353         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 354         if (ret && (ret != -ENOIOCTLCMD)) {
 355                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 356                 goto err;
 357         }
 358
 359         /* set ppi params */
 360         params.width = bcap_dev->fmt.width;
 361         params.height = bcap_dev->fmt.height;
 362         params.bpp = bcap_dev->bpp;
 363         params.dlen = bcap_dev->dlen;
 364         params.ppi_control = bcap_dev->cfg->ppi_control;
 365         params.int_mask = bcap_dev->cfg->int_mask;
 366         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 367                         & V4L2_IN_CAP_DV_TIMINGS) {
 368                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 369
 370                 params.hdelay = bt->hsync + bt->hbackporch;
 371                 params.vdelay = bt->vsync + bt->vbackporch;
 372                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 373                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 374         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 375                         & V4L2_IN_CAP_STD) {
 376                 params.hdelay = 0;
 377                 params.vdelay = 0;
 378                 if (bcap_dev->std & V4L2_STD_525_60) {
 379                         params.line = 858;
 380                         params.frame = 525;
 381                 } else {
 382                         params.line = 864;
 383                         params.frame = 625;
 384                 }
 385         } else {
 386                 params.hdelay = 0;
 387                 params.vdelay = 0;
 388                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 389                 params.frame = params.height;
 390         }
 391         ret = ppi->ops->set_params(ppi, &params);
 392         if (ret < 0) {
 393                 v4l2_err(&bcap_dev->v4l2_dev,
 394                                 "Error in setting ppi params\n");
 395                 goto err;
 396         }
 397
 398         /* attach ppi DMA irq handler */
 399         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 400         if (ret < 0) {
 401                 v4l2_err(&bcap_dev->v4l2_dev,
 402                                 "Error in attaching interrupt handler\n");
 403                 goto err;
 404         }
 405
 406         reinit_completion(&bcap_dev->comp);
 407         bcap_dev->stop = false;
 408
 409         return 0;
 410
 411 err:
 412         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 413                 list_del(&buf->list);
 414                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 415         }
 416
 417         return ret;
 418 }
 419
 420 static void bcap_stop_streaming(struct vb2_queue *vq)
 421 {
 422         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 423         struct ppi_if *ppi = bcap_dev->ppi;
 424         int ret;
 425
 426         bcap_dev->stop = true;
 427         wait_for_completion(&bcap_dev->comp);
 428         ppi->ops->stop(ppi);
 429         ppi->ops->detach_irq(ppi);
 430         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 431         if (ret && (ret != -ENOIOCTLCMD))
 432                 v4l2_err(&bcap_dev->v4l2_dev,
 433                                 "stream off failed in subdev\n");
 434
 435         /* release all active buffers */
 436         while (!list_empty(&bcap_dev->dma_queue)) {
 437                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 438                                                 struct bcap_buffer, list);
 439                 list_del_init(&bcap_dev->cur_frm->list);
 440                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 441         }
 442 }
 443
 444 static struct vb2_ops bcap_video_qops = {
 445         .queue_setup            = bcap_queue_setup,
 446         .buf_prepare            = bcap_buffer_prepare,
 447         .buf_cleanup            = bcap_buffer_cleanup,
 448         .buf_queue              = bcap_buffer_queue,
 449         .wait_prepare           = vb2_ops_wait_prepare,
 450         .wait_finish            = vb2_ops_wait_finish,
 451         .start_streaming        = bcap_start_streaming,
 452         .stop_streaming         = bcap_stop_streaming,
 453 };
 454
 455 static int bcap_reqbufs(struct file *file, void *priv,
 456                         struct v4l2_requestbuffers *req_buf)
 457 {
 458         struct bcap_device *bcap_dev = video_drvdata(file);
 459         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 460         struct v4l2_fh *fh = file->private_data;
 461         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 462
 463         if (vb2_is_busy(vq))
 464                 return -EBUSY;
 465
 466         bcap_fh->io_allowed = true;
 467
 468         return vb2_reqbufs(vq, req_buf);
 469 }
 470
 471 static int bcap_querybuf(struct file *file, void *priv,
 472                                 struct v4l2_buffer *buf)
 473 {
 474         struct bcap_device *bcap_dev = video_drvdata(file);
 475
 476         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 477 }
 478
 479 static int bcap_qbuf(struct file *file, void *priv,
 480                         struct v4l2_buffer *buf)
 481 {
 482         struct bcap_device *bcap_dev = video_drvdata(file);
 483         struct v4l2_fh *fh = file->private_data;
 484         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 485
 486         if (!bcap_fh->io_allowed)
 487                 return -EBUSY;
 488
 489         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 490 }
 491
 492 static int bcap_dqbuf(struct file *file, void *priv,
 493                         struct v4l2_buffer *buf)
 494 {
 495         struct bcap_device *bcap_dev = video_drvdata(file);
 496         struct v4l2_fh *fh = file->private_data;
 497         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 498
 499         if (!bcap_fh->io_allowed)
 500                 return -EBUSY;
 501
 502         return vb2_dqbuf(&bcap_dev->buffer_queue,
 503                                 buf, file->f_flags & O_NONBLOCK);
 504 }
 505
 506 static irqreturn_t bcap_isr(int irq, void *dev_id)
 507 {
 508         struct ppi_if *ppi = dev_id;
 509         struct bcap_device *bcap_dev = ppi->priv;
 510         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 511         dma_addr_t addr;
 512
 513         spin_lock(&bcap_dev->lock);
 514
 515         if (!list_empty(&bcap_dev->dma_queue)) {
 516                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 517                 if (ppi->err) {
 518                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 519                         ppi->err = false;
 520                 } else {
 521                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 522                 }
 523                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 524                                 struct bcap_buffer, list);
 525                 list_del_init(&bcap_dev->cur_frm->list);
 526         } else {
 527                 /* clear error flag, we will get a new frame */
 528                 if (ppi->err)
 529                         ppi->err = false;
 530         }
 531
 532         ppi->ops->stop(ppi);
 533
 534         if (bcap_dev->stop) {
 535                 complete(&bcap_dev->comp);
 536         } else {
 537                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 538                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 539                 ppi->ops->start(ppi);
 540         }
 541
 542         spin_unlock(&bcap_dev->lock);
 543
 544         return IRQ_HANDLED;
 545 }
 546
 547 static int bcap_streamon(struct file *file, void *priv,
 548                                 enum v4l2_buf_type buf_type)
 549 {
 550         struct bcap_device *bcap_dev = video_drvdata(file);
 551         struct bcap_fh *fh = file->private_data;
 552         struct ppi_if *ppi = bcap_dev->ppi;
 553         dma_addr_t addr;
 554         int ret;
 555
 556         if (!fh->io_allowed)
 557                 return -EBUSY;
 558
 559         /* call streamon to start streaming in videobuf */
 560         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 561         if (ret)
 562                 return ret;
 563
 564         /* if dma queue is empty, return error */
 565         if (list_empty(&bcap_dev->dma_queue)) {
 566                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 567                 ret = -EINVAL;
 568                 goto err;
 569         }
 570
 571         /* get the next frame from the dma queue */
 572         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 573                                         struct bcap_buffer, list);
 574         /* remove buffer from the dma queue */
 575         list_del_init(&bcap_dev->cur_frm->list);
 576         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 577         /* update DMA address */
 578         ppi->ops->update_addr(ppi, (unsigned long)addr);
 579         /* enable ppi */
 580         ppi->ops->start(ppi);
 581
 582         return 0;
 583 err:
 584         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 585         return ret;
 586 }
 587
 588 static int bcap_streamoff(struct file *file, void *priv,
 589                                 enum v4l2_buf_type buf_type)
 590 {
 591         struct bcap_device *bcap_dev = video_drvdata(file);
 592         struct bcap_fh *fh = file->private_data;
 593
 594         if (!fh->io_allowed)
 595                 return -EBUSY;
 596
 597         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 598 }
 599
 600 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 601 {
 602         struct bcap_device *bcap_dev = video_drvdata(file);
 603
 604         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 605 }
 606
 607 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 608 {
 609         struct bcap_device *bcap_dev = video_drvdata(file);
 610
 611         *std = bcap_dev->std;
 612         return 0;
 613 }
 614
 615 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 616 {
 617         struct bcap_device *bcap_dev = video_drvdata(file);
 618         int ret;
 619
 620         if (vb2_is_busy(&bcap_dev->buffer_queue))
 621                 return -EBUSY;
 622
 623         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 624         if (ret < 0)
 625                 return ret;
 626
 627         bcap_dev->std = std;
 628         return 0;
 629 }
 630
 631 static int bcap_enum_dv_timings(struct file *file, void *priv,
 632                                 struct v4l2_enum_dv_timings *timings)
 633 {
 634         struct bcap_device *bcap_dev = video_drvdata(file);
 635
 636         timings->pad = 0;
 637
 638         return v4l2_subdev_call(bcap_dev->sd, pad,
 639                         enum_dv_timings, timings);
 640 }
 641
 642 static int bcap_query_dv_timings(struct file *file, void *priv,
 643                                 struct v4l2_dv_timings *timings)
 644 {
 645         struct bcap_device *bcap_dev = video_drvdata(file);
 646
 647         return v4l2_subdev_call(bcap_dev->sd, video,
 648                                 query_dv_timings, timings);
 649 }
 650
 651 static int bcap_g_dv_timings(struct file *file, void *priv,
 652                                 struct v4l2_dv_timings *timings)
 653 {
 654         struct bcap_device *bcap_dev = video_drvdata(file);
 655
 656         *timings = bcap_dev->dv_timings;
 657         return 0;
 658 }
 659
 660 static int bcap_s_dv_timings(struct file *file, void *priv,
 661                                 struct v4l2_dv_timings *timings)
 662 {
 663         struct bcap_device *bcap_dev = video_drvdata(file);
 664         int ret;
 665         if (vb2_is_busy(&bcap_dev->buffer_queue))
 666                 return -EBUSY;
 667
 668         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 669         if (ret < 0)
 670                 return ret;
 671
 672         bcap_dev->dv_timings = *timings;
 673         return 0;
 674 }
 675
 676 static int bcap_enum_input(struct file *file, void *priv,
 677                                 struct v4l2_input *input)
 678 {
 679         struct bcap_device *bcap_dev = video_drvdata(file);
 680         struct bfin_capture_config *config = bcap_dev->cfg;
 681         int ret;
 682         u32 status;
 683
 684         if (input->index >= config->num_inputs)
 685                 return -EINVAL;
 686
 687         *input = config->inputs[input->index];
 688         /* get input status */
 689         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 690         if (!ret)
 691                 input->status = status;
 692         return 0;
 693 }
 694
 695 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 696 {
 697         struct bcap_device *bcap_dev = video_drvdata(file);
 698
 699         *index = bcap_dev->cur_input;
 700         return 0;
 701 }
 702
 703 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 704 {
 705         struct bcap_device *bcap_dev = video_drvdata(file);
 706         struct bfin_capture_config *config = bcap_dev->cfg;
 707         struct bcap_route *route;
 708         int ret;
 709
 710         if (vb2_is_busy(&bcap_dev->buffer_queue))
 711                 return -EBUSY;
 712
 713         if (index >= config->num_inputs)
 714                 return -EINVAL;
 715
 716         route = &config->routes[index];
 717         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 718                                 route->input, route->output, 0);
 719         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 720                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 721                 return ret;
 722         }
 723         bcap_dev->cur_input = index;
 724         /* if this route has specific config, update ppi control */
 725         if (route->ppi_control)
 726                 config->ppi_control = route->ppi_control;
 727         return 0;
 728 }
 729
 730 static int bcap_try_format(struct bcap_device *bcap,
 731                                 struct v4l2_pix_format *pixfmt,
 732                                 struct bcap_format *bcap_fmt)
 733 {
 734         struct bcap_format *sf = bcap->sensor_formats;
 735         struct bcap_format *fmt = NULL;
 736         struct v4l2_mbus_framefmt mbus_fmt;
 737         int ret, i;
 738
 739         for (i = 0; i < bcap->num_sensor_formats; i++) {
 740                 fmt = &sf[i];
 741                 if (pixfmt->pixelformat == fmt->pixelformat)
 742                         break;
 743         }
 744         if (i == bcap->num_sensor_formats)
 745                 fmt = &sf[0];
 746
 747         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 748         ret = v4l2_subdev_call(bcap->sd, video,
 749                                 try_mbus_fmt, &mbus_fmt);
 750         if (ret < 0)
 751                 return ret;
 752         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 753         if (bcap_fmt) {
 754                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 755                         fmt = &sf[i];
 756                         if (mbus_fmt.code == fmt->mbus_code)
 757                                 break;
 758                 }
 759                 *bcap_fmt = *fmt;
 760         }
 761         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 762         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 763         return 0;
 764 }
 765
 766 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 767                                         struct v4l2_fmtdesc *fmt)
 768 {
 769         struct bcap_device *bcap_dev = video_drvdata(file);
 770         struct bcap_format *sf = bcap_dev->sensor_formats;
 771
 772         if (fmt->index >= bcap_dev->num_sensor_formats)
 773                 return -EINVAL;
 774
 775         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 776         strlcpy(fmt->description,
 777                 sf[fmt->index].desc,
 778                 sizeof(fmt->description));
 779         fmt->pixelformat = sf[fmt->index].pixelformat;
 780         return 0;
 781 }
 782
 783 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 784                                         struct v4l2_format *fmt)
 785 {
 786         struct bcap_device *bcap_dev = video_drvdata(file);
 787         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 788
 789         return bcap_try_format(bcap_dev, pixfmt, NULL);
 790 }
 791
 792 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 793                                 struct v4l2_format *fmt)
 794 {
 795         struct bcap_device *bcap_dev = video_drvdata(file);
 796
 797         fmt->fmt.pix = bcap_dev->fmt;
 798         return 0;
 799 }
 800
 801 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 802                                 struct v4l2_format *fmt)
 803 {
 804         struct bcap_device *bcap_dev = video_drvdata(file);
 805         struct v4l2_mbus_framefmt mbus_fmt;
 806         struct bcap_format bcap_fmt;
 807         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 808         int ret;
 809
 810         if (vb2_is_busy(&bcap_dev->buffer_queue))
 811                 return -EBUSY;
 812
 813         /* see if format works */
 814         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 815         if (ret < 0)
 816                 return ret;
 817
 818         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 819         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 820         if (ret < 0)
 821                 return ret;
 822         bcap_dev->fmt = *pixfmt;
 823         bcap_dev->bpp = bcap_fmt.bpp;
 824         bcap_dev->dlen = bcap_fmt.dlen;
 825         return 0;
 826 }
 827
 828 static int bcap_querycap(struct file *file, void  *priv,
 829                                 struct v4l2_capability *cap)
 830 {
 831         struct bcap_device *bcap_dev = video_drvdata(file);
 832
 833         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 834         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 835         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 836         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 837         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 838         return 0;
 839 }
 840
 841 static int bcap_g_parm(struct file *file, void *fh,
 842                                 struct v4l2_streamparm *a)
 843 {
 844         struct bcap_device *bcap_dev = video_drvdata(file);
 845
 846         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 847                 return -EINVAL;
 848         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 849 }
 850
 851 static int bcap_s_parm(struct file *file, void *fh,
 852                                 struct v4l2_streamparm *a)
 853 {
 854         struct bcap_device *bcap_dev = video_drvdata(file);
 855
 856         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 857                 return -EINVAL;
 858         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 859 }
 860
 861 static int bcap_log_status(struct file *file, void *priv)
 862 {
 863         struct bcap_device *bcap_dev = video_drvdata(file);
 864         /* status for sub devices */
 865         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 866         return 0;
 867 }
 868
 869 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 870         .vidioc_querycap         = bcap_querycap,
 871         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 872         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 873         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 874         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 875         .vidioc_enum_input       = bcap_enum_input,
 876         .vidioc_g_input          = bcap_g_input,
 877         .vidioc_s_input          = bcap_s_input,
 878         .vidioc_querystd         = bcap_querystd,
 879         .vidioc_s_std            = bcap_s_std,
 880         .vidioc_g_std            = bcap_g_std,
 881         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 882         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 883         .vidioc_query_dv_timings = bcap_query_dv_timings,
 884         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 885         .vidioc_reqbufs          = bcap_reqbufs,
 886         .vidioc_querybuf         = bcap_querybuf,
 887         .vidioc_qbuf             = bcap_qbuf,
 888         .vidioc_dqbuf            = bcap_dqbuf,
 889         .vidioc_streamon         = bcap_streamon,
 890         .vidioc_streamoff        = bcap_streamoff,
 891         .vidioc_g_parm           = bcap_g_parm,
 892         .vidioc_s_parm           = bcap_s_parm,
 893         .vidioc_log_status       = bcap_log_status,
 894 };
 895
 896 static struct v4l2_file_operations bcap_fops = {
 897         .owner = THIS_MODULE,
 898         .open = bcap_open,
 899         .release = bcap_release,
 900         .unlocked_ioctl = video_ioctl2,
 901         .mmap = bcap_mmap,
 902 #ifndef CONFIG_MMU
 903         .get_unmapped_area = bcap_get_unmapped_area,
 904 #endif
 905         .poll = bcap_poll
 906 };
 907
 908 static int bcap_probe(struct platform_device *pdev)
 909 {
 910         struct bcap_device *bcap_dev;
 911         struct video_device *vfd;
 912         struct i2c_adapter *i2c_adap;
 913         struct bfin_capture_config *config;
 914         struct vb2_queue *q;
 915         struct bcap_route *route;
 916         int ret;
 917
 918         config = pdev->dev.platform_data;
 919         if (!config || !config->num_inputs) {
 920                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 921                 return -ENODEV;
 922         }
 923
 924         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 925         if (!bcap_dev) {
 926                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 927                 return -ENOMEM;
 928         }
 929
 930         bcap_dev->cfg = config;
 931
 932         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 933         if (!bcap_dev->ppi) {
 934                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 935                 ret = -ENODEV;
 936                 goto err_free_dev;
 937         }
 938         bcap_dev->ppi->priv = bcap_dev;
 939
 940         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 941         if (IS_ERR(bcap_dev->alloc_ctx)) {
 942                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 943                 goto err_free_ppi;
 944         }
 945
 946         vfd = video_device_alloc();
 947         if (!vfd) {
 948                 ret = -ENOMEM;
 949                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 950                 goto err_cleanup_ctx;
 951         }
 952
 953         /* initialize field of video device */
 954         vfd->release            = video_device_release;
 955         vfd->fops               = &bcap_fops;
 956         vfd->ioctl_ops          = &bcap_ioctl_ops;
 957         vfd->tvnorms            = 0;
 958         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 959         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 960         bcap_dev->video_dev     = vfd;
 961
 962         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 963         if (ret) {
 964                 v4l2_err(pdev->dev.driver,
 965                                 "Unable to register v4l2 device\n");
 966                 goto err_release_vdev;
 967         }
 968         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 969
 970         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 971         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 972         if (ret) {
 973                 v4l2_err(&bcap_dev->v4l2_dev,
 974                                 "Unable to init control handler\n");
 975                 goto err_unreg_v4l2;
 976         }
 977
 978         spin_lock_init(&bcap_dev->lock);
 979         /* initialize queue */
 980         q = &bcap_dev->buffer_queue;
 981         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 982         q->io_modes = VB2_MMAP;
 983         q->drv_priv = bcap_dev;
 984         q->buf_struct_size = sizeof(struct bcap_buffer);
 985         q->ops = &bcap_video_qops;
 986         q->mem_ops = &vb2_dma_contig_memops;
 987         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 988         q->lock = &bcap_dev->mutex;
 989         q->min_buffers_needed = 1;
 990
 991         ret = vb2_queue_init(q);
 992         if (ret)
 993                 goto err_free_handler;
 994
 995         mutex_init(&bcap_dev->mutex);
 996         init_completion(&bcap_dev->comp);
 997
 998         /* init video dma queues */
 999         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1000
1001         vfd->lock = &bcap_dev->mutex;
1002
1003         /* register video device */
1004         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1005         if (ret) {
1006                 v4l2_err(&bcap_dev->v4l2_dev,
1007                                 "Unable to register video device\n");
1008                 goto err_free_handler;
1009         }
1010         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1011         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1012                         video_device_node_name(vfd));
1013
1014         /* load up the subdevice */
1015         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1016         if (!i2c_adap) {
1017                 v4l2_err(&bcap_dev->v4l2_dev,
1018                                 "Unable to find i2c adapter\n");
1019                 ret = -ENODEV;
1020                 goto err_unreg_vdev;
1021
1022         }
1023         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1024                                                  i2c_adap,
1025                                                  &config->board_info,
1026                                                  NULL);
1027         if (bcap_dev->sd) {
1028                 int i;
1029
1030                 /* update tvnorms from the sub devices */
1031                 for (i = 0; i < config->num_inputs; i++)
1032                         vfd->tvnorms |= config->inputs[i].std;
1033         } else {
1034                 v4l2_err(&bcap_dev->v4l2_dev,
1035                                 "Unable to register sub device\n");
1036                 ret = -ENODEV;
1037                 goto err_unreg_vdev;
1038         }
1039
1040         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1041
1042         /*
1043          * explicitly set input, otherwise some boards
1044          * may not work at the state as we expected
1045          */
1046         route = &config->routes[0];
1047         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1048                                 route->input, route->output, 0);
1049         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1050                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1051                 goto err_unreg_vdev;
1052         }
1053         bcap_dev->cur_input = 0;
1054         /* if this route has specific config, update ppi control */
1055         if (route->ppi_control)
1056                 config->ppi_control = route->ppi_control;
1057
1058         /* now we can probe the default state */
1059         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1060                 v4l2_std_id std;
1061                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1062                 if (ret) {
1063                         v4l2_err(&bcap_dev->v4l2_dev,
1064                                         "Unable to get std\n");
1065                         goto err_unreg_vdev;
1066                 }
1067                 bcap_dev->std = std;
1068         }
1069         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1070                 struct v4l2_dv_timings dv_timings;
1071                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1072                                 g_dv_timings, &dv_timings);
1073                 if (ret) {
1074                         v4l2_err(&bcap_dev->v4l2_dev,
1075                                         "Unable to get dv timings\n");
1076                         goto err_unreg_vdev;
1077                 }
1078                 bcap_dev->dv_timings = dv_timings;
1079         }
1080         ret = bcap_init_sensor_formats(bcap_dev);
1081         if (ret) {
1082                 v4l2_err(&bcap_dev->v4l2_dev,
1083                                 "Unable to create sensor formats table\n");
1084                 goto err_unreg_vdev;
1085         }
1086         return 0;
1087 err_unreg_vdev:
1088         video_unregister_device(bcap_dev->video_dev);
1089         bcap_dev->video_dev = NULL;
1090 err_free_handler:
1091         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1092 err_unreg_v4l2:
1093         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1094 err_release_vdev:
1095         if (bcap_dev->video_dev)
1096                 video_device_release(bcap_dev->video_dev);
1097 err_cleanup_ctx:
1098         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1099 err_free_ppi:
1100         ppi_delete_instance(bcap_dev->ppi);
1101 err_free_dev:
1102         kfree(bcap_dev);
1103         return ret;
1104 }
1105
1106 static int bcap_remove(struct platform_device *pdev)
1107 {
1108         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1109         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1110                                                 struct bcap_device, v4l2_dev);
1111
1112         bcap_free_sensor_formats(bcap_dev);
1113         video_unregister_device(bcap_dev->video_dev);
1114         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1115         v4l2_device_unregister(v4l2_dev);
1116         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1117         ppi_delete_instance(bcap_dev->ppi);
1118         kfree(bcap_dev);
1119         return 0;
1120 }
1121
1122 static struct platform_driver bcap_driver = {
1123         .driver = {
1124                 .name  = CAPTURE_DRV_NAME,
1125         },
1126         .probe = bcap_probe,
1127         .remove = bcap_remove,
1128 };
1129 module_platform_driver(bcap_driver);
1130
1131 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1132 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1133 MODULE_LICENSE("GPL v2");