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
  16 #include <linux/completion.h>
  17 #include <linux/delay.h>
  18 #include <linux/errno.h>
  19 #include <linux/fs.h>
  20 #include <linux/i2c.h>
  21 #include <linux/init.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/io.h>
  24 #include <linux/mm.h>
  25 #include <linux/module.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/slab.h>
  28 #include <linux/time.h>
  29 #include <linux/types.h>
  30
  31 #include <media/v4l2-common.h>
  32 #include <media/v4l2-ctrls.h>
  33 #include <media/v4l2-device.h>
  34 #include <media/v4l2-ioctl.h>
  35 #include <media/videobuf2-dma-contig.h>
  36
  37 #include <asm/dma.h>
  38
  39 #include <media/blackfin/bfin_capture.h>
  40 #include <media/blackfin/ppi.h>
  41
  42 #define CAPTURE_DRV_NAME        "bfin_capture"
  43
  44 struct bcap_format {
  45         char *desc;
  46         u32 pixelformat;
  47         u32 mbus_code;
  48         int bpp; /* bits per pixel */
  49         int dlen; /* data length for ppi in bits */
  50 };
  51
  52 struct bcap_buffer {
  53         struct vb2_v4l2_buffer vb;
  54         struct list_head list;
  55 };
  56
  57 struct bcap_device {
  58         /* capture device instance */
  59         struct v4l2_device v4l2_dev;
  60         /* v4l2 control handler */
  61         struct v4l2_ctrl_handler ctrl_handler;
  62         /* device node data */
  63         struct video_device video_dev;
  64         /* sub device instance */
  65         struct v4l2_subdev *sd;
  66         /* capture config */
  67         struct bfin_capture_config *cfg;
  68         /* ppi interface */
  69         struct ppi_if *ppi;
  70         /* current input */
  71         unsigned int cur_input;
  72         /* current selected standard */
  73         v4l2_std_id std;
  74         /* current selected dv_timings */
  75         struct v4l2_dv_timings dv_timings;
  76         /* used to store pixel format */
  77         struct v4l2_pix_format fmt;
  78         /* bits per pixel*/
  79         int bpp;
  80         /* data length for ppi in bits */
  81         int dlen;
  82         /* used to store sensor supported format */
  83         struct bcap_format *sensor_formats;
  84         /* number of sensor formats array */
  85         int num_sensor_formats;
  86         /* pointing to current video buffer */
  87         struct bcap_buffer *cur_frm;
  88         /* buffer queue used in videobuf2 */
  89         struct vb2_queue buffer_queue;
  90         /* queue of filled frames */
  91         struct list_head dma_queue;
  92         /* used in videobuf2 callback */
  93         spinlock_t lock;
  94         /* used to access capture device */
  95         struct mutex mutex;
  96         /* used to wait ppi to complete one transfer */
  97         struct completion comp;
  98         /* prepare to stop */
  99         bool stop;
 100         /* vb2 buffer sequence counter */
 101         unsigned sequence;
 102 };
 103
 104 static const struct bcap_format bcap_formats[] = {
 105         {
 106                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 107                 .pixelformat = V4L2_PIX_FMT_UYVY,
 108                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 109                 .bpp         = 16,
 110                 .dlen        = 8,
 111         },
 112         {
 113                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 114                 .pixelformat = V4L2_PIX_FMT_YUYV,
 115                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 116                 .bpp         = 16,
 117                 .dlen        = 8,
 118         },
 119         {
 120                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 121                 .pixelformat = V4L2_PIX_FMT_UYVY,
 122                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 123                 .bpp         = 16,
 124                 .dlen        = 16,
 125         },
 126         {
 127                 .desc        = "RGB 565",
 128                 .pixelformat = V4L2_PIX_FMT_RGB565,
 129                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 130                 .bpp         = 16,
 131                 .dlen        = 8,
 132         },
 133         {
 134                 .desc        = "RGB 444",
 135                 .pixelformat = V4L2_PIX_FMT_RGB444,
 136                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 137                 .bpp         = 16,
 138                 .dlen        = 8,
 139         },
 140
 141 };
 142 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 143
 144 static irqreturn_t bcap_isr(int irq, void *dev_id);
 145
 146 static struct bcap_buffer *to_bcap_vb(struct vb2_v4l2_buffer *vb)
 147 {
 148         return container_of(vb, struct bcap_buffer, vb);
 149 }
 150
 151 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 152 {
 153         struct v4l2_subdev_mbus_code_enum code = {
 154                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 155         };
 156         struct bcap_format *sf;
 157         unsigned int num_formats = 0;
 158         int i, j;
 159
 160         while (!v4l2_subdev_call(bcap_dev->sd, pad,
 161                                 enum_mbus_code, NULL, &code)) {
 162                 num_formats++;
 163                 code.index++;
 164         }
 165         if (!num_formats)
 166                 return -ENXIO;
 167
 168         sf = kcalloc(num_formats, sizeof(*sf), GFP_KERNEL);
 169         if (!sf)
 170                 return -ENOMEM;
 171
 172         for (i = 0; i < num_formats; i++) {
 173                 code.index = i;
 174                 v4l2_subdev_call(bcap_dev->sd, pad,
 175                                 enum_mbus_code, NULL, &code);
 176                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 177                         if (code.code == bcap_formats[j].mbus_code)
 178                                 break;
 179                 if (j == BCAP_MAX_FMTS) {
 180                         /* we don't allow this sensor working with our bridge */
 181                         kfree(sf);
 182                         return -EINVAL;
 183                 }
 184                 sf[i] = bcap_formats[j];
 185         }
 186         bcap_dev->sensor_formats = sf;
 187         bcap_dev->num_sensor_formats = num_formats;
 188         return 0;
 189 }
 190
 191 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 192 {
 193         bcap_dev->num_sensor_formats = 0;
 194         kfree(bcap_dev->sensor_formats);
 195         bcap_dev->sensor_formats = NULL;
 196 }
 197
 198 static int bcap_queue_setup(struct vb2_queue *vq,
 199                                 unsigned int *nbuffers, unsigned int *nplanes,
 200                                 unsigned int sizes[], struct device *alloc_devs[])
 201 {
 202         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 203
 204         if (vq->num_buffers + *nbuffers < 2)
 205                 *nbuffers = 2;
 206
 207         if (*nplanes)
 208                 return sizes[0] < bcap_dev->fmt.sizeimage ? -EINVAL : 0;
 209
 210         *nplanes = 1;
 211         sizes[0] = bcap_dev->fmt.sizeimage;
 212
 213         return 0;
 214 }
 215
 216 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 217 {
 218         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 219         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 220         unsigned long size = bcap_dev->fmt.sizeimage;
 221
 222         if (vb2_plane_size(vb, 0) < size) {
 223                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 224                                 vb2_plane_size(vb, 0), size);
 225                 return -EINVAL;
 226         }
 227         vb2_set_plane_payload(vb, 0, size);
 228
 229         vbuf->field = bcap_dev->fmt.field;
 230
 231         return 0;
 232 }
 233
 234 static void bcap_buffer_queue(struct vb2_buffer *vb)
 235 {
 236         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 237         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 238         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 239         unsigned long flags;
 240
 241         spin_lock_irqsave(&bcap_dev->lock, flags);
 242         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 243         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 244 }
 245
 246 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 247 {
 248         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 249         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 250         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 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.vb2_buf,
 332                                                 0);
 333         /* update DMA address */
 334         ppi->ops->update_addr(ppi, (unsigned long)addr);
 335         /* enable ppi */
 336         ppi->ops->start(ppi);
 337
 338         return 0;
 339
 340 err:
 341         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 342                 list_del(&buf->list);
 343                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 344         }
 345
 346         return ret;
 347 }
 348
 349 static void bcap_stop_streaming(struct vb2_queue *vq)
 350 {
 351         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 352         struct ppi_if *ppi = bcap_dev->ppi;
 353         int ret;
 354
 355         bcap_dev->stop = true;
 356         wait_for_completion(&bcap_dev->comp);
 357         ppi->ops->stop(ppi);
 358         ppi->ops->detach_irq(ppi);
 359         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 360         if (ret && (ret != -ENOIOCTLCMD))
 361                 v4l2_err(&bcap_dev->v4l2_dev,
 362                                 "stream off failed in subdev\n");
 363
 364         /* release all active buffers */
 365         if (bcap_dev->cur_frm)
 366                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
 367                                 VB2_BUF_STATE_ERROR);
 368
 369         while (!list_empty(&bcap_dev->dma_queue)) {
 370                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 371                                                 struct bcap_buffer, list);
 372                 list_del_init(&bcap_dev->cur_frm->list);
 373                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
 374                                 VB2_BUF_STATE_ERROR);
 375         }
 376 }
 377
 378 static const struct vb2_ops bcap_video_qops = {
 379         .queue_setup            = bcap_queue_setup,
 380         .buf_prepare            = bcap_buffer_prepare,
 381         .buf_cleanup            = bcap_buffer_cleanup,
 382         .buf_queue              = bcap_buffer_queue,
 383         .wait_prepare           = vb2_ops_wait_prepare,
 384         .wait_finish            = vb2_ops_wait_finish,
 385         .start_streaming        = bcap_start_streaming,
 386         .stop_streaming         = bcap_stop_streaming,
 387 };
 388
 389 static irqreturn_t bcap_isr(int irq, void *dev_id)
 390 {
 391         struct ppi_if *ppi = dev_id;
 392         struct bcap_device *bcap_dev = ppi->priv;
 393         struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
 394         struct vb2_buffer *vb = &vbuf->vb2_buf;
 395         dma_addr_t addr;
 396
 397         spin_lock(&bcap_dev->lock);
 398
 399         if (!list_empty(&bcap_dev->dma_queue)) {
 400                 vb->timestamp = ktime_get_ns();
 401                 if (ppi->err) {
 402                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 403                         ppi->err = false;
 404                 } else {
 405                         vbuf->sequence = bcap_dev->sequence++;
 406                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 407                 }
 408                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 409                                 struct bcap_buffer, list);
 410                 list_del_init(&bcap_dev->cur_frm->list);
 411         } else {
 412                 /* clear error flag, we will get a new frame */
 413                 if (ppi->err)
 414                         ppi->err = false;
 415         }
 416
 417         ppi->ops->stop(ppi);
 418
 419         if (bcap_dev->stop) {
 420                 complete(&bcap_dev->comp);
 421         } else {
 422                 addr = vb2_dma_contig_plane_dma_addr(
 423                                 &bcap_dev->cur_frm->vb.vb2_buf, 0);
 424                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 425                 ppi->ops->start(ppi);
 426         }
 427
 428         spin_unlock(&bcap_dev->lock);
 429
 430         return IRQ_HANDLED;
 431 }
 432
 433 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 434 {
 435         struct bcap_device *bcap_dev = video_drvdata(file);
 436         struct v4l2_input input;
 437
 438         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 439         if (!(input.capabilities & V4L2_IN_CAP_STD))
 440                 return -ENODATA;
 441
 442         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 443 }
 444
 445 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 446 {
 447         struct bcap_device *bcap_dev = video_drvdata(file);
 448         struct v4l2_input input;
 449
 450         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 451         if (!(input.capabilities & V4L2_IN_CAP_STD))
 452                 return -ENODATA;
 453
 454         *std = bcap_dev->std;
 455         return 0;
 456 }
 457
 458 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 459 {
 460         struct bcap_device *bcap_dev = video_drvdata(file);
 461         struct v4l2_input input;
 462         int ret;
 463
 464         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 465         if (!(input.capabilities & V4L2_IN_CAP_STD))
 466                 return -ENODATA;
 467
 468         if (vb2_is_busy(&bcap_dev->buffer_queue))
 469                 return -EBUSY;
 470
 471         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 472         if (ret < 0)
 473                 return ret;
 474
 475         bcap_dev->std = std;
 476         return 0;
 477 }
 478
 479 static int bcap_enum_dv_timings(struct file *file, void *priv,
 480                                 struct v4l2_enum_dv_timings *timings)
 481 {
 482         struct bcap_device *bcap_dev = video_drvdata(file);
 483         struct v4l2_input input;
 484
 485         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 486         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 487                 return -ENODATA;
 488
 489         timings->pad = 0;
 490
 491         return v4l2_subdev_call(bcap_dev->sd, pad,
 492                         enum_dv_timings, timings);
 493 }
 494
 495 static int bcap_query_dv_timings(struct file *file, void *priv,
 496                                 struct v4l2_dv_timings *timings)
 497 {
 498         struct bcap_device *bcap_dev = video_drvdata(file);
 499         struct v4l2_input input;
 500
 501         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 502         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 503                 return -ENODATA;
 504
 505         return v4l2_subdev_call(bcap_dev->sd, video,
 506                                 query_dv_timings, timings);
 507 }
 508
 509 static int bcap_g_dv_timings(struct file *file, void *priv,
 510                                 struct v4l2_dv_timings *timings)
 511 {
 512         struct bcap_device *bcap_dev = video_drvdata(file);
 513         struct v4l2_input input;
 514
 515         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 516         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 517                 return -ENODATA;
 518
 519         *timings = bcap_dev->dv_timings;
 520         return 0;
 521 }
 522
 523 static int bcap_s_dv_timings(struct file *file, void *priv,
 524                                 struct v4l2_dv_timings *timings)
 525 {
 526         struct bcap_device *bcap_dev = video_drvdata(file);
 527         struct v4l2_input input;
 528         int ret;
 529
 530         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 531         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 532                 return -ENODATA;
 533
 534         if (vb2_is_busy(&bcap_dev->buffer_queue))
 535                 return -EBUSY;
 536
 537         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 538         if (ret < 0)
 539                 return ret;
 540
 541         bcap_dev->dv_timings = *timings;
 542         return 0;
 543 }
 544
 545 static int bcap_enum_input(struct file *file, void *priv,
 546                                 struct v4l2_input *input)
 547 {
 548         struct bcap_device *bcap_dev = video_drvdata(file);
 549         struct bfin_capture_config *config = bcap_dev->cfg;
 550         int ret;
 551         u32 status;
 552
 553         if (input->index >= config->num_inputs)
 554                 return -EINVAL;
 555
 556         *input = config->inputs[input->index];
 557         /* get input status */
 558         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 559         if (!ret)
 560                 input->status = status;
 561         return 0;
 562 }
 563
 564 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 565 {
 566         struct bcap_device *bcap_dev = video_drvdata(file);
 567
 568         *index = bcap_dev->cur_input;
 569         return 0;
 570 }
 571
 572 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 573 {
 574         struct bcap_device *bcap_dev = video_drvdata(file);
 575         struct bfin_capture_config *config = bcap_dev->cfg;
 576         struct bcap_route *route;
 577         int ret;
 578
 579         if (vb2_is_busy(&bcap_dev->buffer_queue))
 580                 return -EBUSY;
 581
 582         if (index >= config->num_inputs)
 583                 return -EINVAL;
 584
 585         route = &config->routes[index];
 586         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 587                                 route->input, route->output, 0);
 588         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 589                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 590                 return ret;
 591         }
 592         bcap_dev->cur_input = index;
 593         /* if this route has specific config, update ppi control */
 594         if (route->ppi_control)
 595                 config->ppi_control = route->ppi_control;
 596         return 0;
 597 }
 598
 599 static int bcap_try_format(struct bcap_device *bcap,
 600                                 struct v4l2_pix_format *pixfmt,
 601                                 struct bcap_format *bcap_fmt)
 602 {
 603         struct bcap_format *sf = bcap->sensor_formats;
 604         struct bcap_format *fmt = NULL;
 605         struct v4l2_subdev_pad_config pad_cfg;
 606         struct v4l2_subdev_format format = {
 607                 .which = V4L2_SUBDEV_FORMAT_TRY,
 608         };
 609         int ret, i;
 610
 611         for (i = 0; i < bcap->num_sensor_formats; i++) {
 612                 fmt = &sf[i];
 613                 if (pixfmt->pixelformat == fmt->pixelformat)
 614                         break;
 615         }
 616         if (i == bcap->num_sensor_formats)
 617                 fmt = &sf[0];
 618
 619         v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
 620         ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
 621                                 &format);
 622         if (ret < 0)
 623                 return ret;
 624         v4l2_fill_pix_format(pixfmt, &format.format);
 625         if (bcap_fmt) {
 626                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 627                         fmt = &sf[i];
 628                         if (format.format.code == fmt->mbus_code)
 629                                 break;
 630                 }
 631                 *bcap_fmt = *fmt;
 632         }
 633         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 634         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 635         return 0;
 636 }
 637
 638 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 639                                         struct v4l2_fmtdesc *fmt)
 640 {
 641         struct bcap_device *bcap_dev = video_drvdata(file);
 642         struct bcap_format *sf = bcap_dev->sensor_formats;
 643
 644         if (fmt->index >= bcap_dev->num_sensor_formats)
 645                 return -EINVAL;
 646
 647         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 648         strlcpy(fmt->description,
 649                 sf[fmt->index].desc,
 650                 sizeof(fmt->description));
 651         fmt->pixelformat = sf[fmt->index].pixelformat;
 652         return 0;
 653 }
 654
 655 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 656                                         struct v4l2_format *fmt)
 657 {
 658         struct bcap_device *bcap_dev = video_drvdata(file);
 659         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 660
 661         return bcap_try_format(bcap_dev, pixfmt, NULL);
 662 }
 663
 664 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 665                                 struct v4l2_format *fmt)
 666 {
 667         struct bcap_device *bcap_dev = video_drvdata(file);
 668
 669         fmt->fmt.pix = bcap_dev->fmt;
 670         return 0;
 671 }
 672
 673 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 674                                 struct v4l2_format *fmt)
 675 {
 676         struct bcap_device *bcap_dev = video_drvdata(file);
 677         struct v4l2_subdev_format format = {
 678                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 679         };
 680         struct bcap_format bcap_fmt;
 681         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 682         int ret;
 683
 684         if (vb2_is_busy(&bcap_dev->buffer_queue))
 685                 return -EBUSY;
 686
 687         /* see if format works */
 688         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 689         if (ret < 0)
 690                 return ret;
 691
 692         v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
 693         ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
 694         if (ret < 0)
 695                 return ret;
 696         bcap_dev->fmt = *pixfmt;
 697         bcap_dev->bpp = bcap_fmt.bpp;
 698         bcap_dev->dlen = bcap_fmt.dlen;
 699         return 0;
 700 }
 701
 702 static int bcap_querycap(struct file *file, void  *priv,
 703                                 struct v4l2_capability *cap)
 704 {
 705         struct bcap_device *bcap_dev = video_drvdata(file);
 706
 707         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 708         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 709         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 710         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 711         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 712         return 0;
 713 }
 714
 715 static int bcap_g_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, g_parm, a);
 723 }
 724
 725 static int bcap_s_parm(struct file *file, void *fh,
 726                                 struct v4l2_streamparm *a)
 727 {
 728         struct bcap_device *bcap_dev = video_drvdata(file);
 729
 730         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 731                 return -EINVAL;
 732         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 733 }
 734
 735 static int bcap_log_status(struct file *file, void *priv)
 736 {
 737         struct bcap_device *bcap_dev = video_drvdata(file);
 738         /* status for sub devices */
 739         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 740         return 0;
 741 }
 742
 743 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 744         .vidioc_querycap         = bcap_querycap,
 745         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 746         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 747         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 748         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 749         .vidioc_enum_input       = bcap_enum_input,
 750         .vidioc_g_input          = bcap_g_input,
 751         .vidioc_s_input          = bcap_s_input,
 752         .vidioc_querystd         = bcap_querystd,
 753         .vidioc_s_std            = bcap_s_std,
 754         .vidioc_g_std            = bcap_g_std,
 755         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 756         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 757         .vidioc_query_dv_timings = bcap_query_dv_timings,
 758         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 759         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
 760         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
 761         .vidioc_querybuf         = vb2_ioctl_querybuf,
 762         .vidioc_qbuf             = vb2_ioctl_qbuf,
 763         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
 764         .vidioc_expbuf           = vb2_ioctl_expbuf,
 765         .vidioc_streamon         = vb2_ioctl_streamon,
 766         .vidioc_streamoff        = vb2_ioctl_streamoff,
 767         .vidioc_g_parm           = bcap_g_parm,
 768         .vidioc_s_parm           = bcap_s_parm,
 769         .vidioc_log_status       = bcap_log_status,
 770 };
 771
 772 static const struct v4l2_file_operations bcap_fops = {
 773         .owner = THIS_MODULE,
 774         .open = v4l2_fh_open,
 775         .release = vb2_fop_release,
 776         .unlocked_ioctl = video_ioctl2,
 777         .mmap = vb2_fop_mmap,
 778 #ifndef CONFIG_MMU
 779         .get_unmapped_area = vb2_fop_get_unmapped_area,
 780 #endif
 781         .poll = vb2_fop_poll
 782 };
 783
 784 static int bcap_probe(struct platform_device *pdev)
 785 {
 786         struct bcap_device *bcap_dev;
 787         struct video_device *vfd;
 788         struct i2c_adapter *i2c_adap;
 789         struct bfin_capture_config *config;
 790         struct vb2_queue *q;
 791         struct bcap_route *route;
 792         int ret;
 793
 794         config = pdev->dev.platform_data;
 795         if (!config || !config->num_inputs) {
 796                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 797                 return -ENODEV;
 798         }
 799
 800         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 801         if (!bcap_dev)
 802                 return -ENOMEM;
 803
 804         bcap_dev->cfg = config;
 805
 806         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 807         if (!bcap_dev->ppi) {
 808                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 809                 ret = -ENODEV;
 810                 goto err_free_dev;
 811         }
 812         bcap_dev->ppi->priv = bcap_dev;
 813
 814         vfd = &bcap_dev->video_dev;
 815         /* initialize field of video device */
 816         vfd->release            = video_device_release_empty;
 817         vfd->fops               = &bcap_fops;
 818         vfd->ioctl_ops          = &bcap_ioctl_ops;
 819         vfd->tvnorms            = 0;
 820         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 821         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 822
 823         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 824         if (ret) {
 825                 v4l2_err(pdev->dev.driver,
 826                                 "Unable to register v4l2 device\n");
 827                 goto err_free_ppi;
 828         }
 829         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 830
 831         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 832         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 833         if (ret) {
 834                 v4l2_err(&bcap_dev->v4l2_dev,
 835                                 "Unable to init control handler\n");
 836                 goto err_unreg_v4l2;
 837         }
 838
 839         spin_lock_init(&bcap_dev->lock);
 840         /* initialize queue */
 841         q = &bcap_dev->buffer_queue;
 842         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 843         q->io_modes = VB2_MMAP | VB2_DMABUF;
 844         q->drv_priv = bcap_dev;
 845         q->buf_struct_size = sizeof(struct bcap_buffer);
 846         q->ops = &bcap_video_qops;
 847         q->mem_ops = &vb2_dma_contig_memops;
 848         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 849         q->lock = &bcap_dev->mutex;
 850         q->min_buffers_needed = 1;
 851         q->dev = &pdev->dev;
 852
 853         ret = vb2_queue_init(q);
 854         if (ret)
 855                 goto err_free_handler;
 856
 857         mutex_init(&bcap_dev->mutex);
 858         init_completion(&bcap_dev->comp);
 859
 860         /* init video dma queues */
 861         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 862
 863         vfd->lock = &bcap_dev->mutex;
 864         vfd->queue = q;
 865
 866         /* register video device */
 867         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 868         if (ret) {
 869                 v4l2_err(&bcap_dev->v4l2_dev,
 870                                 "Unable to register video device\n");
 871                 goto err_free_handler;
 872         }
 873         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
 874         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 875                         video_device_node_name(vfd));
 876
 877         /* load up the subdevice */
 878         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 879         if (!i2c_adap) {
 880                 v4l2_err(&bcap_dev->v4l2_dev,
 881                                 "Unable to find i2c adapter\n");
 882                 ret = -ENODEV;
 883                 goto err_unreg_vdev;
 884
 885         }
 886         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 887                                                  i2c_adap,
 888                                                  &config->board_info,
 889                                                  NULL);
 890         if (bcap_dev->sd) {
 891                 int i;
 892
 893                 /* update tvnorms from the sub devices */
 894                 for (i = 0; i < config->num_inputs; i++)
 895                         vfd->tvnorms |= config->inputs[i].std;
 896         } else {
 897                 v4l2_err(&bcap_dev->v4l2_dev,
 898                                 "Unable to register sub device\n");
 899                 ret = -ENODEV;
 900                 goto err_unreg_vdev;
 901         }
 902
 903         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 904
 905         /*
 906          * explicitly set input, otherwise some boards
 907          * may not work at the state as we expected
 908          */
 909         route = &config->routes[0];
 910         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 911                                 route->input, route->output, 0);
 912         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 913                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 914                 goto err_unreg_vdev;
 915         }
 916         bcap_dev->cur_input = 0;
 917         /* if this route has specific config, update ppi control */
 918         if (route->ppi_control)
 919                 config->ppi_control = route->ppi_control;
 920
 921         /* now we can probe the default state */
 922         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
 923                 v4l2_std_id std;
 924                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
 925                 if (ret) {
 926                         v4l2_err(&bcap_dev->v4l2_dev,
 927                                         "Unable to get std\n");
 928                         goto err_unreg_vdev;
 929                 }
 930                 bcap_dev->std = std;
 931         }
 932         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
 933                 struct v4l2_dv_timings dv_timings;
 934                 ret = v4l2_subdev_call(bcap_dev->sd, video,
 935                                 g_dv_timings, &dv_timings);
 936                 if (ret) {
 937                         v4l2_err(&bcap_dev->v4l2_dev,
 938                                         "Unable to get dv timings\n");
 939                         goto err_unreg_vdev;
 940                 }
 941                 bcap_dev->dv_timings = dv_timings;
 942         }
 943         ret = bcap_init_sensor_formats(bcap_dev);
 944         if (ret) {
 945                 v4l2_err(&bcap_dev->v4l2_dev,
 946                                 "Unable to create sensor formats table\n");
 947                 goto err_unreg_vdev;
 948         }
 949         return 0;
 950 err_unreg_vdev:
 951         video_unregister_device(&bcap_dev->video_dev);
 952 err_free_handler:
 953         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 954 err_unreg_v4l2:
 955         v4l2_device_unregister(&bcap_dev->v4l2_dev);
 956 err_free_ppi:
 957         ppi_delete_instance(bcap_dev->ppi);
 958 err_free_dev:
 959         kfree(bcap_dev);
 960         return ret;
 961 }
 962
 963 static int bcap_remove(struct platform_device *pdev)
 964 {
 965         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
 966         struct bcap_device *bcap_dev = container_of(v4l2_dev,
 967                                                 struct bcap_device, v4l2_dev);
 968
 969         bcap_free_sensor_formats(bcap_dev);
 970         video_unregister_device(&bcap_dev->video_dev);
 971         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 972         v4l2_device_unregister(v4l2_dev);
 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");