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         struct v4l2_subdev_mbus_code_enum code = {
 160                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 161         };
 162         struct bcap_format *sf;
 163         unsigned int num_formats = 0;
 164         int i, j;
 165
 166         while (!v4l2_subdev_call(bcap_dev->sd, pad,
 167                                 enum_mbus_code, NULL, &code)) {
 168                 num_formats++;
 169                 code.index++;
 170         }
 171         if (!num_formats)
 172                 return -ENXIO;
 173
 174         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 175         if (!sf)
 176                 return -ENOMEM;
 177
 178         for (i = 0; i < num_formats; i++) {
 179                 code.index = i;
 180                 v4l2_subdev_call(bcap_dev->sd, pad,
 181                                 enum_mbus_code, NULL, &code);
 182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 183                         if (code.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_queue_setup(struct vb2_queue *vq,
 205                                 const struct v4l2_format *fmt,
 206                                 unsigned int *nbuffers, unsigned int *nplanes,
 207                                 unsigned int sizes[], void *alloc_ctxs[])
 208 {
 209         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 210
 211         if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
 212                 return -EINVAL;
 213
 214         if (vq->num_buffers + *nbuffers < 2)
 215                 *nbuffers = 2;
 216
 217         *nplanes = 1;
 218         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
 219         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 220
 221         return 0;
 222 }
 223
 224 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 225 {
 226         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 227         unsigned long size = bcap_dev->fmt.sizeimage;
 228
 229         if (vb2_plane_size(vb, 0) < size) {
 230                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 231                                 vb2_plane_size(vb, 0), size);
 232                 return -EINVAL;
 233         }
 234         vb2_set_plane_payload(vb, 0, size);
 235
 236         vb->v4l2_buf.field = bcap_dev->fmt.field;
 237
 238         return 0;
 239 }
 240
 241 static void bcap_buffer_queue(struct vb2_buffer *vb)
 242 {
 243         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 244         struct bcap_buffer *buf = to_bcap_vb(vb);
 245         unsigned long flags;
 246
 247         spin_lock_irqsave(&bcap_dev->lock, flags);
 248         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 249         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 250 }
 251
 252 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 253 {
 254         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 255         struct bcap_buffer *buf = to_bcap_vb(vb);
 256         unsigned long flags;
 257
 258         spin_lock_irqsave(&bcap_dev->lock, flags);
 259         list_del_init(&buf->list);
 260         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 261 }
 262
 263 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 264 {
 265         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 266         struct ppi_if *ppi = bcap_dev->ppi;
 267         struct bcap_buffer *buf, *tmp;
 268         struct ppi_params params;
 269         dma_addr_t addr;
 270         int ret;
 271
 272         /* enable streamon on the sub device */
 273         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 274         if (ret && (ret != -ENOIOCTLCMD)) {
 275                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 276                 goto err;
 277         }
 278
 279         /* set ppi params */
 280         params.width = bcap_dev->fmt.width;
 281         params.height = bcap_dev->fmt.height;
 282         params.bpp = bcap_dev->bpp;
 283         params.dlen = bcap_dev->dlen;
 284         params.ppi_control = bcap_dev->cfg->ppi_control;
 285         params.int_mask = bcap_dev->cfg->int_mask;
 286         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 287                         & V4L2_IN_CAP_DV_TIMINGS) {
 288                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 289
 290                 params.hdelay = bt->hsync + bt->hbackporch;
 291                 params.vdelay = bt->vsync + bt->vbackporch;
 292                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 293                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 294         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 295                         & V4L2_IN_CAP_STD) {
 296                 params.hdelay = 0;
 297                 params.vdelay = 0;
 298                 if (bcap_dev->std & V4L2_STD_525_60) {
 299                         params.line = 858;
 300                         params.frame = 525;
 301                 } else {
 302                         params.line = 864;
 303                         params.frame = 625;
 304                 }
 305         } else {
 306                 params.hdelay = 0;
 307                 params.vdelay = 0;
 308                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 309                 params.frame = params.height;
 310         }
 311         ret = ppi->ops->set_params(ppi, &params);
 312         if (ret < 0) {
 313                 v4l2_err(&bcap_dev->v4l2_dev,
 314                                 "Error in setting ppi params\n");
 315                 goto err;
 316         }
 317
 318         /* attach ppi DMA irq handler */
 319         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 320         if (ret < 0) {
 321                 v4l2_err(&bcap_dev->v4l2_dev,
 322                                 "Error in attaching interrupt handler\n");
 323                 goto err;
 324         }
 325
 326         bcap_dev->sequence = 0;
 327
 328         reinit_completion(&bcap_dev->comp);
 329         bcap_dev->stop = false;
 330
 331         /* get the next frame from the dma queue */
 332         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 333                                         struct bcap_buffer, list);
 334         /* remove buffer from the dma queue */
 335         list_del_init(&bcap_dev->cur_frm->list);
 336         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 337         /* update DMA address */
 338         ppi->ops->update_addr(ppi, (unsigned long)addr);
 339         /* enable ppi */
 340         ppi->ops->start(ppi);
 341
 342         return 0;
 343
 344 err:
 345         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 346                 list_del(&buf->list);
 347                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 348         }
 349
 350         return ret;
 351 }
 352
 353 static void bcap_stop_streaming(struct vb2_queue *vq)
 354 {
 355         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 356         struct ppi_if *ppi = bcap_dev->ppi;
 357         int ret;
 358
 359         bcap_dev->stop = true;
 360         wait_for_completion(&bcap_dev->comp);
 361         ppi->ops->stop(ppi);
 362         ppi->ops->detach_irq(ppi);
 363         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 364         if (ret && (ret != -ENOIOCTLCMD))
 365                 v4l2_err(&bcap_dev->v4l2_dev,
 366                                 "stream off failed in subdev\n");
 367
 368         /* release all active buffers */
 369         if (bcap_dev->cur_frm)
 370                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 371
 372         while (!list_empty(&bcap_dev->dma_queue)) {
 373                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 374                                                 struct bcap_buffer, list);
 375                 list_del_init(&bcap_dev->cur_frm->list);
 376                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 377         }
 378 }
 379
 380 static struct vb2_ops bcap_video_qops = {
 381         .queue_setup            = bcap_queue_setup,
 382         .buf_prepare            = bcap_buffer_prepare,
 383         .buf_cleanup            = bcap_buffer_cleanup,
 384         .buf_queue              = bcap_buffer_queue,
 385         .wait_prepare           = vb2_ops_wait_prepare,
 386         .wait_finish            = vb2_ops_wait_finish,
 387         .start_streaming        = bcap_start_streaming,
 388         .stop_streaming         = bcap_stop_streaming,
 389 };
 390
 391 static irqreturn_t bcap_isr(int irq, void *dev_id)
 392 {
 393         struct ppi_if *ppi = dev_id;
 394         struct bcap_device *bcap_dev = ppi->priv;
 395         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 396         dma_addr_t addr;
 397
 398         spin_lock(&bcap_dev->lock);
 399
 400         if (!list_empty(&bcap_dev->dma_queue)) {
 401                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 402                 if (ppi->err) {
 403                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 404                         ppi->err = false;
 405                 } else {
 406                         vb->v4l2_buf.sequence = bcap_dev->sequence++;
 407                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 408                 }
 409                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 410                                 struct bcap_buffer, list);
 411                 list_del_init(&bcap_dev->cur_frm->list);
 412         } else {
 413                 /* clear error flag, we will get a new frame */
 414                 if (ppi->err)
 415                         ppi->err = false;
 416         }
 417
 418         ppi->ops->stop(ppi);
 419
 420         if (bcap_dev->stop) {
 421                 complete(&bcap_dev->comp);
 422         } else {
 423                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 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 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                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 803                 return -ENOMEM;
 804         }
 805
 806         bcap_dev->cfg = config;
 807
 808         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 809         if (!bcap_dev->ppi) {
 810                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 811                 ret = -ENODEV;
 812                 goto err_free_dev;
 813         }
 814         bcap_dev->ppi->priv = bcap_dev;
 815
 816         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 817         if (IS_ERR(bcap_dev->alloc_ctx)) {
 818                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 819                 goto err_free_ppi;
 820         }
 821
 822         vfd = &bcap_dev->video_dev;
 823         /* initialize field of video device */
 824         vfd->release            = video_device_release_empty;
 825         vfd->fops               = &bcap_fops;
 826         vfd->ioctl_ops          = &bcap_ioctl_ops;
 827         vfd->tvnorms            = 0;
 828         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 829         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 830
 831         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 832         if (ret) {
 833                 v4l2_err(pdev->dev.driver,
 834                                 "Unable to register v4l2 device\n");
 835                 goto err_cleanup_ctx;
 836         }
 837         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 838
 839         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 840         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 841         if (ret) {
 842                 v4l2_err(&bcap_dev->v4l2_dev,
 843                                 "Unable to init control handler\n");
 844                 goto err_unreg_v4l2;
 845         }
 846
 847         spin_lock_init(&bcap_dev->lock);
 848         /* initialize queue */
 849         q = &bcap_dev->buffer_queue;
 850         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 851         q->io_modes = VB2_MMAP | VB2_DMABUF;
 852         q->drv_priv = bcap_dev;
 853         q->buf_struct_size = sizeof(struct bcap_buffer);
 854         q->ops = &bcap_video_qops;
 855         q->mem_ops = &vb2_dma_contig_memops;
 856         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 857         q->lock = &bcap_dev->mutex;
 858         q->min_buffers_needed = 1;
 859
 860         ret = vb2_queue_init(q);
 861         if (ret)
 862                 goto err_free_handler;
 863
 864         mutex_init(&bcap_dev->mutex);
 865         init_completion(&bcap_dev->comp);
 866
 867         /* init video dma queues */
 868         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 869
 870         vfd->lock = &bcap_dev->mutex;
 871         vfd->queue = q;
 872
 873         /* register video device */
 874         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 875         if (ret) {
 876                 v4l2_err(&bcap_dev->v4l2_dev,
 877                                 "Unable to register video device\n");
 878                 goto err_free_handler;
 879         }
 880         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
 881         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 882                         video_device_node_name(vfd));
 883
 884         /* load up the subdevice */
 885         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 886         if (!i2c_adap) {
 887                 v4l2_err(&bcap_dev->v4l2_dev,
 888                                 "Unable to find i2c adapter\n");
 889                 ret = -ENODEV;
 890                 goto err_unreg_vdev;
 891
 892         }
 893         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 894                                                  i2c_adap,
 895                                                  &config->board_info,
 896                                                  NULL);
 897         if (bcap_dev->sd) {
 898                 int i;
 899
 900                 /* update tvnorms from the sub devices */
 901                 for (i = 0; i < config->num_inputs; i++)
 902                         vfd->tvnorms |= config->inputs[i].std;
 903         } else {
 904                 v4l2_err(&bcap_dev->v4l2_dev,
 905                                 "Unable to register sub device\n");
 906                 ret = -ENODEV;
 907                 goto err_unreg_vdev;
 908         }
 909
 910         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 911
 912         /*
 913          * explicitly set input, otherwise some boards
 914          * may not work at the state as we expected
 915          */
 916         route = &config->routes[0];
 917         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 918                                 route->input, route->output, 0);
 919         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 920                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 921                 goto err_unreg_vdev;
 922         }
 923         bcap_dev->cur_input = 0;
 924         /* if this route has specific config, update ppi control */
 925         if (route->ppi_control)
 926                 config->ppi_control = route->ppi_control;
 927
 928         /* now we can probe the default state */
 929         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
 930                 v4l2_std_id std;
 931                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
 932                 if (ret) {
 933                         v4l2_err(&bcap_dev->v4l2_dev,
 934                                         "Unable to get std\n");
 935                         goto err_unreg_vdev;
 936                 }
 937                 bcap_dev->std = std;
 938         }
 939         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
 940                 struct v4l2_dv_timings dv_timings;
 941                 ret = v4l2_subdev_call(bcap_dev->sd, video,
 942                                 g_dv_timings, &dv_timings);
 943                 if (ret) {
 944                         v4l2_err(&bcap_dev->v4l2_dev,
 945                                         "Unable to get dv timings\n");
 946                         goto err_unreg_vdev;
 947                 }
 948                 bcap_dev->dv_timings = dv_timings;
 949         }
 950         ret = bcap_init_sensor_formats(bcap_dev);
 951         if (ret) {
 952                 v4l2_err(&bcap_dev->v4l2_dev,
 953                                 "Unable to create sensor formats table\n");
 954                 goto err_unreg_vdev;
 955         }
 956         return 0;
 957 err_unreg_vdev:
 958         video_unregister_device(&bcap_dev->video_dev);
 959 err_free_handler:
 960         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 961 err_unreg_v4l2:
 962         v4l2_device_unregister(&bcap_dev->v4l2_dev);
 963 err_cleanup_ctx:
 964         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 965 err_free_ppi:
 966         ppi_delete_instance(bcap_dev->ppi);
 967 err_free_dev:
 968         kfree(bcap_dev);
 969         return ret;
 970 }
 971
 972 static int bcap_remove(struct platform_device *pdev)
 973 {
 974         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
 975         struct bcap_device *bcap_dev = container_of(v4l2_dev,
 976                                                 struct bcap_device, v4l2_dev);
 977
 978         bcap_free_sensor_formats(bcap_dev);
 979         video_unregister_device(&bcap_dev->video_dev);
 980         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 981         v4l2_device_unregister(v4l2_dev);
 982         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 983         ppi_delete_instance(bcap_dev->ppi);
 984         kfree(bcap_dev);
 985         return 0;
 986 }
 987
 988 static struct platform_driver bcap_driver = {
 989         .driver = {
 990                 .name  = CAPTURE_DRV_NAME,
 991         },
 992         .probe = bcap_probe,
 993         .remove = bcap_remove,
 994 };
 995 module_platform_driver(bcap_driver);
 996
 997 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
 998 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
 999 MODULE_LICENSE("GPL v2");