kernel/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
  48 struct bcap_format {
  49         char *desc;
  50         u32 pixelformat;
  51         u32 mbus_code;
  52         int bpp; /* bits per pixel */
  53         int dlen; /* data length for ppi in bits */
  54 };
  55
  56 struct bcap_buffer {
  57         struct vb2_buffer vb;
  58         struct list_head list;
  59 };
  60
  61 struct bcap_device {
  62         /* capture device instance */
  63         struct v4l2_device v4l2_dev;
  64         /* v4l2 control handler */
  65         struct v4l2_ctrl_handler ctrl_handler;
  66         /* device node data */
  67         struct video_device video_dev;
  68         /* sub device instance */
  69         struct v4l2_subdev *sd;
  70         /* capture config */
  71         struct bfin_capture_config *cfg;
  72         /* ppi interface */
  73         struct ppi_if *ppi;
  74         /* current input */
  75         unsigned int cur_input;
  76         /* current selected standard */
  77         v4l2_std_id std;
  78         /* current selected dv_timings */
  79         struct v4l2_dv_timings dv_timings;
  80         /* used to store pixel format */
  81         struct v4l2_pix_format fmt;
  82         /* bits per pixel*/
  83         int bpp;
  84         /* data length for ppi in bits */
  85         int dlen;
  86         /* used to store sensor supported format */
  87         struct bcap_format *sensor_formats;
  88         /* number of sensor formats array */
  89         int num_sensor_formats;
  90         /* pointing to current video buffer */
  91         struct bcap_buffer *cur_frm;
  92         /* buffer queue used in videobuf2 */
  93         struct vb2_queue buffer_queue;
  94         /* allocator-specific contexts for each plane */
  95         struct vb2_alloc_ctx *alloc_ctx;
  96         /* queue of filled frames */
  97         struct list_head dma_queue;
  98         /* used in videobuf2 callback */
  99         spinlock_t lock;
 100         /* used to access capture device */
 101         struct mutex mutex;
 102         /* used to wait ppi to complete one transfer */
 103         struct completion comp;
 104         /* prepare to stop */
 105         bool stop;
 106         /* vb2 buffer sequence counter */
 107         unsigned sequence;
 108 };
 109
 110 static const struct bcap_format bcap_formats[] = {
 111         {
 112                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 113                 .pixelformat = V4L2_PIX_FMT_UYVY,
 114                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 115                 .bpp         = 16,
 116                 .dlen        = 8,
 117         },
 118         {
 119                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 120                 .pixelformat = V4L2_PIX_FMT_YUYV,
 121                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 122                 .bpp         = 16,
 123                 .dlen        = 8,
 124         },
 125         {
 126                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 127                 .pixelformat = V4L2_PIX_FMT_UYVY,
 128                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 129                 .bpp         = 16,
 130                 .dlen        = 16,
 131         },
 132         {
 133                 .desc        = "RGB 565",
 134                 .pixelformat = V4L2_PIX_FMT_RGB565,
 135                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 136                 .bpp         = 16,
 137                 .dlen        = 8,
 138         },
 139         {
 140                 .desc        = "RGB 444",
 141                 .pixelformat = V4L2_PIX_FMT_RGB444,
 142                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 143                 .bpp         = 16,
 144                 .dlen        = 8,
 145         },
 146
 147 };
 148 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 149
 150 static irqreturn_t bcap_isr(int irq, void *dev_id);
 151
 152 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 153 {
 154         return container_of(vb, struct bcap_buffer, vb);
 155 }
 156
 157 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 158 {
 159         u32 code;
 160         struct bcap_format *sf;
 161         unsigned int num_formats = 0;
 162         int i, j;
 163
 164         while (!v4l2_subdev_call(bcap_dev->sd, video,
 165                                 enum_mbus_fmt, num_formats, &code))
 166                 num_formats++;
 167         if (!num_formats)
 168                 return -ENXIO;
 169
 170         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 171         if (!sf)
 172                 return -ENOMEM;
 173
 174         for (i = 0; i < num_formats; i++) {
 175                 v4l2_subdev_call(bcap_dev->sd, video,
 176                                 enum_mbus_fmt, i, &code);
 177                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 178                         if (code == bcap_formats[j].mbus_code)
 179                                 break;
 180                 if (j == BCAP_MAX_FMTS) {
 181                         /* we don't allow this sensor working with our bridge */
 182                         kfree(sf);
 183                         return -EINVAL;
 184                 }
 185                 sf[i] = bcap_formats[j];
 186         }
 187         bcap_dev->sensor_formats = sf;
 188         bcap_dev->num_sensor_formats = num_formats;
 189         return 0;
 190 }
 191
 192 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 193 {
 194         bcap_dev->num_sensor_formats = 0;
 195         kfree(bcap_dev->sensor_formats);
 196         bcap_dev->sensor_formats = NULL;
 197 }
 198
 199 static int bcap_queue_setup(struct vb2_queue *vq,
 200                                 const struct v4l2_format *fmt,
 201                                 unsigned int *nbuffers, unsigned int *nplanes,
 202                                 unsigned int sizes[], void *alloc_ctxs[])
 203 {
 204         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 205
 206         if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
 207                 return -EINVAL;
 208
 209         if (vq->num_buffers + *nbuffers < 2)
 210                 *nbuffers = 2;
 211
 212         *nplanes = 1;
 213         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
 214         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 215
 216         return 0;
 217 }
 218
 219 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 220 {
 221         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 222         unsigned long size = bcap_dev->fmt.sizeimage;
 223
 224         if (vb2_plane_size(vb, 0) < size) {
 225                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 226                                 vb2_plane_size(vb, 0), size);
 227                 return -EINVAL;
 228         }
 229         vb2_set_plane_payload(vb, 0, size);
 230
 231         vb->v4l2_buf.field = bcap_dev->fmt.field;
 232
 233         return 0;
 234 }
 235
 236 static void bcap_buffer_queue(struct vb2_buffer *vb)
 237 {
 238         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 239         struct bcap_buffer *buf = to_bcap_vb(vb);
 240         unsigned long flags;
 241
 242         spin_lock_irqsave(&bcap_dev->lock, flags);
 243         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 244         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 245 }
 246
 247 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 248 {
 249         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 250         struct bcap_buffer *buf = to_bcap_vb(vb);
 251         unsigned long flags;
 252
 253         spin_lock_irqsave(&bcap_dev->lock, flags);
 254         list_del_init(&buf->list);
 255         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 256 }
 257
 258 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 259 {
 260         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 261         struct ppi_if *ppi = bcap_dev->ppi;
 262         struct bcap_buffer *buf, *tmp;
 263         struct ppi_params params;
 264         dma_addr_t addr;
 265         int ret;
 266
 267         /* enable streamon on the sub device */
 268         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 269         if (ret && (ret != -ENOIOCTLCMD)) {
 270                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 271                 goto err;
 272         }
 273
 274         /* set ppi params */
 275         params.width = bcap_dev->fmt.width;
 276         params.height = bcap_dev->fmt.height;
 277         params.bpp = bcap_dev->bpp;
 278         params.dlen = bcap_dev->dlen;
 279         params.ppi_control = bcap_dev->cfg->ppi_control;
 280         params.int_mask = bcap_dev->cfg->int_mask;
 281         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 282                         & V4L2_IN_CAP_DV_TIMINGS) {
 283                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 284
 285                 params.hdelay = bt->hsync + bt->hbackporch;
 286                 params.vdelay = bt->vsync + bt->vbackporch;
 287                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 288                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 289         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 290                         & V4L2_IN_CAP_STD) {
 291                 params.hdelay = 0;
 292                 params.vdelay = 0;
 293                 if (bcap_dev->std & V4L2_STD_525_60) {
 294                         params.line = 858;
 295                         params.frame = 525;
 296                 } else {
 297                         params.line = 864;
 298                         params.frame = 625;
 299                 }
 300         } else {
 301                 params.hdelay = 0;
 302                 params.vdelay = 0;
 303                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 304                 params.frame = params.height;
 305         }
 306         ret = ppi->ops->set_params(ppi, &params);
 307         if (ret < 0) {
 308                 v4l2_err(&bcap_dev->v4l2_dev,
 309                                 "Error in setting ppi params\n");
 310                 goto err;
 311         }
 312
 313         /* attach ppi DMA irq handler */
 314         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 315         if (ret < 0) {
 316                 v4l2_err(&bcap_dev->v4l2_dev,
 317                                 "Error in attaching interrupt handler\n");
 318                 goto err;
 319         }
 320
 321         bcap_dev->sequence = 0;
 322
 323         reinit_completion(&bcap_dev->comp);
 324         bcap_dev->stop = false;
 325
 326         /* get the next frame from the dma queue */
 327         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 328                                         struct bcap_buffer, list);
 329         /* remove buffer from the dma queue */
 330         list_del_init(&bcap_dev->cur_frm->list);
 331         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 332         /* update DMA address */
 333         ppi->ops->update_addr(ppi, (unsigned long)addr);
 334         /* enable ppi */
 335         ppi->ops->start(ppi);
 336
 337         return 0;
 338
 339 err:
 340         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 341                 list_del(&buf->list);
 342                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 343         }
 344
 345         return ret;
 346 }
 347
 348 static void bcap_stop_streaming(struct vb2_queue *vq)
 349 {
 350         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 351         struct ppi_if *ppi = bcap_dev->ppi;
 352         int ret;
 353
 354         bcap_dev->stop = true;
 355         wait_for_completion(&bcap_dev->comp);
 356         ppi->ops->stop(ppi);
 357         ppi->ops->detach_irq(ppi);
 358         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 359         if (ret && (ret != -ENOIOCTLCMD))
 360                 v4l2_err(&bcap_dev->v4l2_dev,
 361                                 "stream off failed in subdev\n");
 362
 363         /* release all active buffers */
 364         if (bcap_dev->cur_frm)
 365                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 366
 367         while (!list_empty(&bcap_dev->dma_queue)) {
 368                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 369                                                 struct bcap_buffer, list);
 370                 list_del_init(&bcap_dev->cur_frm->list);
 371                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 372         }
 373 }
 374
 375 static struct vb2_ops bcap_video_qops = {
 376         .queue_setup            = bcap_queue_setup,
 377         .buf_prepare            = bcap_buffer_prepare,
 378         .buf_cleanup            = bcap_buffer_cleanup,
 379         .buf_queue              = bcap_buffer_queue,
 380         .wait_prepare           = vb2_ops_wait_prepare,
 381         .wait_finish            = vb2_ops_wait_finish,
 382         .start_streaming        = bcap_start_streaming,
 383         .stop_streaming         = bcap_stop_streaming,
 384 };
 385
 386 static irqreturn_t bcap_isr(int irq, void *dev_id)
 387 {
 388         struct ppi_if *ppi = dev_id;
 389         struct bcap_device *bcap_dev = ppi->priv;
 390         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 391         dma_addr_t addr;
 392
 393         spin_lock(&bcap_dev->lock);
 394
 395         if (!list_empty(&bcap_dev->dma_queue)) {
 396                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 397                 if (ppi->err) {
 398                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 399                         ppi->err = false;
 400                 } else {
 401                         vb->v4l2_buf.sequence = bcap_dev->sequence++;
 402                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 403                 }
 404                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 405                                 struct bcap_buffer, list);
 406                 list_del_init(&bcap_dev->cur_frm->list);
 407         } else {
 408                 /* clear error flag, we will get a new frame */
 409                 if (ppi->err)
 410                         ppi->err = false;
 411         }
 412
 413         ppi->ops->stop(ppi);
 414
 415         if (bcap_dev->stop) {
 416                 complete(&bcap_dev->comp);
 417         } else {
 418                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 419                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 420                 ppi->ops->start(ppi);
 421         }
 422
 423         spin_unlock(&bcap_dev->lock);
 424
 425         return IRQ_HANDLED;
 426 }
 427
 428 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 429 {
 430         struct bcap_device *bcap_dev = video_drvdata(file);
 431         struct v4l2_input input;
 432
 433         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 434         if (!(input.capabilities & V4L2_IN_CAP_STD))
 435                 return -ENODATA;
 436
 437         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 438 }
 439
 440 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 441 {
 442         struct bcap_device *bcap_dev = video_drvdata(file);
 443         struct v4l2_input input;
 444
 445         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 446         if (!(input.capabilities & V4L2_IN_CAP_STD))
 447                 return -ENODATA;
 448
 449         *std = bcap_dev->std;
 450         return 0;
 451 }
 452
 453 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 454 {
 455         struct bcap_device *bcap_dev = video_drvdata(file);
 456         struct v4l2_input input;
 457         int ret;
 458
 459         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 460         if (!(input.capabilities & V4L2_IN_CAP_STD))
 461                 return -ENODATA;
 462
 463         if (vb2_is_busy(&bcap_dev->buffer_queue))
 464                 return -EBUSY;
 465
 466         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 467         if (ret < 0)
 468                 return ret;
 469
 470         bcap_dev->std = std;
 471         return 0;
 472 }
 473
 474 static int bcap_enum_dv_timings(struct file *file, void *priv,
 475                                 struct v4l2_enum_dv_timings *timings)
 476 {
 477         struct bcap_device *bcap_dev = video_drvdata(file);
 478         struct v4l2_input input;
 479
 480         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 481         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 482                 return -ENODATA;
 483
 484         timings->pad = 0;
 485
 486         return v4l2_subdev_call(bcap_dev->sd, pad,
 487                         enum_dv_timings, timings);
 488 }
 489
 490 static int bcap_query_dv_timings(struct file *file, void *priv,
 491                                 struct v4l2_dv_timings *timings)
 492 {
 493         struct bcap_device *bcap_dev = video_drvdata(file);
 494         struct v4l2_input input;
 495
 496         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 497         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 498                 return -ENODATA;
 499
 500         return v4l2_subdev_call(bcap_dev->sd, video,
 501                                 query_dv_timings, timings);
 502 }
 503
 504 static int bcap_g_dv_timings(struct file *file, void *priv,
 505                                 struct v4l2_dv_timings *timings)
 506 {
 507         struct bcap_device *bcap_dev = video_drvdata(file);
 508         struct v4l2_input input;
 509
 510         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 511         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 512                 return -ENODATA;
 513
 514         *timings = bcap_dev->dv_timings;
 515         return 0;
 516 }
 517
 518 static int bcap_s_dv_timings(struct file *file, void *priv,
 519                                 struct v4l2_dv_timings *timings)
 520 {
 521         struct bcap_device *bcap_dev = video_drvdata(file);
 522         struct v4l2_input input;
 523         int ret;
 524
 525         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 526         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 527                 return -ENODATA;
 528
 529         if (vb2_is_busy(&bcap_dev->buffer_queue))
 530                 return -EBUSY;
 531
 532         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 533         if (ret < 0)
 534                 return ret;
 535
 536         bcap_dev->dv_timings = *timings;
 537         return 0;
 538 }
 539
 540 static int bcap_enum_input(struct file *file, void *priv,
 541                                 struct v4l2_input *input)
 542 {
 543         struct bcap_device *bcap_dev = video_drvdata(file);
 544         struct bfin_capture_config *config = bcap_dev->cfg;
 545         int ret;
 546         u32 status;
 547
 548         if (input->index >= config->num_inputs)
 549                 return -EINVAL;
 550
 551         *input = config->inputs[input->index];
 552         /* get input status */
 553         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 554         if (!ret)
 555                 input->status = status;
 556         return 0;
 557 }
 558
 559 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 560 {
 561         struct bcap_device *bcap_dev = video_drvdata(file);
 562
 563         *index = bcap_dev->cur_input;
 564         return 0;
 565 }
 566
 567 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 568 {
 569         struct bcap_device *bcap_dev = video_drvdata(file);
 570         struct bfin_capture_config *config = bcap_dev->cfg;
 571         struct bcap_route *route;
 572         int ret;
 573
 574         if (vb2_is_busy(&bcap_dev->buffer_queue))
 575                 return -EBUSY;
 576
 577         if (index >= config->num_inputs)
 578                 return -EINVAL;
 579
 580         route = &config->routes[index];
 581         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 582                                 route->input, route->output, 0);
 583         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 584                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 585                 return ret;
 586         }
 587         bcap_dev->cur_input = index;
 588         /* if this route has specific config, update ppi control */
 589         if (route->ppi_control)
 590                 config->ppi_control = route->ppi_control;
 591         return 0;
 592 }
 593
 594 static int bcap_try_format(struct bcap_device *bcap,
 595                                 struct v4l2_pix_format *pixfmt,
 596                                 struct bcap_format *bcap_fmt)
 597 {
 598         struct bcap_format *sf = bcap->sensor_formats;
 599         struct bcap_format *fmt = NULL;
 600         struct v4l2_mbus_framefmt mbus_fmt;
 601         int ret, i;
 602
 603         for (i = 0; i < bcap->num_sensor_formats; i++) {
 604                 fmt = &sf[i];
 605                 if (pixfmt->pixelformat == fmt->pixelformat)
 606                         break;
 607         }
 608         if (i == bcap->num_sensor_formats)
 609                 fmt = &sf[0];
 610
 611         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 612         ret = v4l2_subdev_call(bcap->sd, video,
 613                                 try_mbus_fmt, &mbus_fmt);
 614         if (ret < 0)
 615                 return ret;
 616         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 617         if (bcap_fmt) {
 618                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 619                         fmt = &sf[i];
 620                         if (mbus_fmt.code == fmt->mbus_code)
 621                                 break;
 622                 }
 623                 *bcap_fmt = *fmt;
 624         }
 625         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 626         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 627         return 0;
 628 }
 629
 630 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 631                                         struct v4l2_fmtdesc *fmt)
 632 {
 633         struct bcap_device *bcap_dev = video_drvdata(file);
 634         struct bcap_format *sf = bcap_dev->sensor_formats;
 635
 636         if (fmt->index >= bcap_dev->num_sensor_formats)
 637                 return -EINVAL;
 638
 639         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 640         strlcpy(fmt->description,
 641                 sf[fmt->index].desc,
 642                 sizeof(fmt->description));
 643         fmt->pixelformat = sf[fmt->index].pixelformat;
 644         return 0;
 645 }
 646
 647 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 648                                         struct v4l2_format *fmt)
 649 {
 650         struct bcap_device *bcap_dev = video_drvdata(file);
 651         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 652
 653         return bcap_try_format(bcap_dev, pixfmt, NULL);
 654 }
 655
 656 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 657                                 struct v4l2_format *fmt)
 658 {
 659         struct bcap_device *bcap_dev = video_drvdata(file);
 660
 661         fmt->fmt.pix = bcap_dev->fmt;
 662         return 0;
 663 }
 664
 665 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 666                                 struct v4l2_format *fmt)
 667 {
 668         struct bcap_device *bcap_dev = video_drvdata(file);
 669         struct v4l2_mbus_framefmt mbus_fmt;
 670         struct bcap_format bcap_fmt;
 671         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 672         int ret;
 673
 674         if (vb2_is_busy(&bcap_dev->buffer_queue))
 675                 return -EBUSY;
 676
 677         /* see if format works */
 678         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 679         if (ret < 0)
 680                 return ret;
 681
 682         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 683         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 684         if (ret < 0)
 685                 return ret;
 686         bcap_dev->fmt = *pixfmt;
 687         bcap_dev->bpp = bcap_fmt.bpp;
 688         bcap_dev->dlen = bcap_fmt.dlen;
 689         return 0;
 690 }
 691
 692 static int bcap_querycap(struct file *file, void  *priv,
 693                                 struct v4l2_capability *cap)
 694 {
 695         struct bcap_device *bcap_dev = video_drvdata(file);
 696
 697         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 698         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 699         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 700         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 701         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 702         return 0;
 703 }
 704
 705 static int bcap_g_parm(struct file *file, void *fh,
 706                                 struct v4l2_streamparm *a)
 707 {
 708         struct bcap_device *bcap_dev = video_drvdata(file);
 709
 710         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 711                 return -EINVAL;
 712         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 713 }
 714
 715 static int bcap_s_parm(struct file *file, void *fh,
 716                                 struct v4l2_streamparm *a)
 717 {
 718         struct bcap_device *bcap_dev = video_drvdata(file);
 719
 720         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 721                 return -EINVAL;
 722         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 723 }
 724
 725 static int bcap_log_status(struct file *file, void *priv)
 726 {
 727         struct bcap_device *bcap_dev = video_drvdata(file);
 728         /* status for sub devices */
 729         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 730         return 0;
 731 }
 732
 733 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 734         .vidioc_querycap         = bcap_querycap,
 735         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 736         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 737         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 738         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 739         .vidioc_enum_input       = bcap_enum_input,
 740         .vidioc_g_input          = bcap_g_input,
 741         .vidioc_s_input          = bcap_s_input,
 742         .vidioc_querystd         = bcap_querystd,
 743         .vidioc_s_std            = bcap_s_std,
 744         .vidioc_g_std            = bcap_g_std,
 745         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 746         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 747         .vidioc_query_dv_timings = bcap_query_dv_timings,
 748         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 749         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
 750         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
 751         .vidioc_querybuf         = vb2_ioctl_querybuf,
 752         .vidioc_qbuf             = vb2_ioctl_qbuf,
 753         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
 754         .vidioc_expbuf           = vb2_ioctl_expbuf,
 755         .vidioc_streamon         = vb2_ioctl_streamon,
 756         .vidioc_streamoff        = vb2_ioctl_streamoff,
 757         .vidioc_g_parm           = bcap_g_parm,
 758         .vidioc_s_parm           = bcap_s_parm,
 759         .vidioc_log_status       = bcap_log_status,
 760 };
 761
 762 static struct v4l2_file_operations bcap_fops = {
 763         .owner = THIS_MODULE,
 764         .open = v4l2_fh_open,
 765         .release = vb2_fop_release,
 766         .unlocked_ioctl = video_ioctl2,
 767         .mmap = vb2_fop_mmap,
 768 #ifndef CONFIG_MMU
 769         .get_unmapped_area = vb2_fop_get_unmapped_area,
 770 #endif
 771         .poll = vb2_fop_poll
 772 };
 773
 774 static int bcap_probe(struct platform_device *pdev)
 775 {
 776         struct bcap_device *bcap_dev;
 777         struct video_device *vfd;
 778         struct i2c_adapter *i2c_adap;
 779         struct bfin_capture_config *config;
 780         struct vb2_queue *q;
 781         struct bcap_route *route;
 782         int ret;
 783
 784         config = pdev->dev.platform_data;
 785         if (!config || !config->num_inputs) {
 786                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 787                 return -ENODEV;
 788         }
 789
 790         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 791         if (!bcap_dev) {
 792                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 793                 return -ENOMEM;
 794         }
 795
 796         bcap_dev->cfg = config;
 797
 798         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 799         if (!bcap_dev->ppi) {
 800                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 801                 ret = -ENODEV;
 802                 goto err_free_dev;
 803         }
 804         bcap_dev->ppi->priv = bcap_dev;
 805
 806         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 807         if (IS_ERR(bcap_dev->alloc_ctx)) {
 808                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 809                 goto err_free_ppi;
 810         }
 811
 812         vfd = &bcap_dev->video_dev;
 813         /* initialize field of video device */
 814         vfd->release            = video_device_release_empty;
 815         vfd->fops               = &bcap_fops;
 816         vfd->ioctl_ops          = &bcap_ioctl_ops;
 817         vfd->tvnorms            = 0;
 818         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 819         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 820
 821         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 822         if (ret) {
 823                 v4l2_err(pdev->dev.driver,
 824                                 "Unable to register v4l2 device\n");
 825                 goto err_cleanup_ctx;
 826         }
 827         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 828
 829         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 830         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 831         if (ret) {
 832                 v4l2_err(&bcap_dev->v4l2_dev,
 833                                 "Unable to init control handler\n");
 834                 goto err_unreg_v4l2;
 835         }
 836
 837         spin_lock_init(&bcap_dev->lock);
 838         /* initialize queue */
 839         q = &bcap_dev->buffer_queue;
 840         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 841         q->io_modes = VB2_MMAP | VB2_DMABUF;
 842         q->drv_priv = bcap_dev;
 843         q->buf_struct_size = sizeof(struct bcap_buffer);
 844         q->ops = &bcap_video_qops;
 845         q->mem_ops = &vb2_dma_contig_memops;
 846         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 847         q->lock = &bcap_dev->mutex;
 848         q->min_buffers_needed = 1;
 849
 850         ret = vb2_queue_init(q);
 851         if (ret)
 852                 goto err_free_handler;
 853
 854         mutex_init(&bcap_dev->mutex);
 855         init_completion(&bcap_dev->comp);
 856
 857         /* init video dma queues */
 858         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 859
 860         vfd->lock = &bcap_dev->mutex;
 861         vfd->queue = q;
 862
 863         /* register video device */
 864         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 865         if (ret) {
 866                 v4l2_err(&bcap_dev->v4l2_dev,
 867                                 "Unable to register video device\n");
 868                 goto err_free_handler;
 869         }
 870         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
 871         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 872                         video_device_node_name(vfd));
 873
 874         /* load up the subdevice */
 875         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 876         if (!i2c_adap) {
 877                 v4l2_err(&bcap_dev->v4l2_dev,
 878                                 "Unable to find i2c adapter\n");
 879                 ret = -ENODEV;
 880                 goto err_unreg_vdev;
 881
 882         }
 883         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 884                                                  i2c_adap,
 885                                                  &config->board_info,
 886                                                  NULL);
 887         if (bcap_dev->sd) {
 888                 int i;
 889
 890                 /* update tvnorms from the sub devices */
 891                 for (i = 0; i < config->num_inputs; i++)
 892                         vfd->tvnorms |= config->inputs[i].std;
 893         } else {
 894                 v4l2_err(&bcap_dev->v4l2_dev,
 895                                 "Unable to register sub device\n");
 896                 ret = -ENODEV;
 897                 goto err_unreg_vdev;
 898         }
 899
 900         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 901
 902         /*
 903          * explicitly set input, otherwise some boards
 904          * may not work at the state as we expected
 905          */
 906         route = &config->routes[0];
 907         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 908                                 route->input, route->output, 0);
 909         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 910                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 911                 goto err_unreg_vdev;
 912         }
 913         bcap_dev->cur_input = 0;
 914         /* if this route has specific config, update ppi control */
 915         if (route->ppi_control)
 916                 config->ppi_control = route->ppi_control;
 917
 918         /* now we can probe the default state */
 919         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
 920                 v4l2_std_id std;
 921                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
 922                 if (ret) {
 923                         v4l2_err(&bcap_dev->v4l2_dev,
 924                                         "Unable to get std\n");
 925                         goto err_unreg_vdev;
 926                 }
 927                 bcap_dev->std = std;
 928         }
 929         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
 930                 struct v4l2_dv_timings dv_timings;
 931                 ret = v4l2_subdev_call(bcap_dev->sd, video,
 932                                 g_dv_timings, &dv_timings);
 933                 if (ret) {
 934                         v4l2_err(&bcap_dev->v4l2_dev,
 935                                         "Unable to get dv timings\n");
 936                         goto err_unreg_vdev;
 937                 }
 938                 bcap_dev->dv_timings = dv_timings;
 939         }
 940         ret = bcap_init_sensor_formats(bcap_dev);
 941         if (ret) {
 942                 v4l2_err(&bcap_dev->v4l2_dev,
 943                                 "Unable to create sensor formats table\n");
 944                 goto err_unreg_vdev;
 945         }
 946         return 0;
 947 err_unreg_vdev:
 948         video_unregister_device(&bcap_dev->video_dev);
 949 err_free_handler:
 950         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 951 err_unreg_v4l2:
 952         v4l2_device_unregister(&bcap_dev->v4l2_dev);
 953 err_cleanup_ctx:
 954         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 955 err_free_ppi:
 956         ppi_delete_instance(bcap_dev->ppi);
 957 err_free_dev:
 958         kfree(bcap_dev);
 959         return ret;
 960 }
 961
 962 static int bcap_remove(struct platform_device *pdev)
 963 {
 964         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
 965         struct bcap_device *bcap_dev = container_of(v4l2_dev,
 966                                                 struct bcap_device, v4l2_dev);
 967
 968         bcap_free_sensor_formats(bcap_dev);
 969         video_unregister_device(&bcap_dev->video_dev);
 970         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 971         v4l2_device_unregister(v4l2_dev);
 972         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 973         ppi_delete_instance(bcap_dev->ppi);
 974         kfree(bcap_dev);
 975         return 0;
 976 }
 977
 978 static struct platform_driver bcap_driver = {
 979         .driver = {
 980                 .name  = CAPTURE_DRV_NAME,
 981         },
 982         .probe = bcap_probe,
 983         .remove = bcap_remove,
 984 };
 985 module_platform_driver(bcap_driver);
 986
 987 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
 988 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
 989 MODULE_LICENSE("GPL v2");