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_v4l2_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         /* queue of filled frames */
  95         struct list_head dma_queue;
  96         /* used in videobuf2 callback */
  97         spinlock_t lock;
  98         /* used to access capture device */
  99         struct mutex mutex;
 100         /* used to wait ppi to complete one transfer */
 101         struct completion comp;
 102         /* prepare to stop */
 103         bool stop;
 104         /* vb2 buffer sequence counter */
 105         unsigned sequence;
 106 };
 107
 108 static const struct bcap_format bcap_formats[] = {
 109         {
 110                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 111                 .pixelformat = V4L2_PIX_FMT_UYVY,
 112                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 113                 .bpp         = 16,
 114                 .dlen        = 8,
 115         },
 116         {
 117                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 118                 .pixelformat = V4L2_PIX_FMT_YUYV,
 119                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 120                 .bpp         = 16,
 121                 .dlen        = 8,
 122         },
 123         {
 124                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 125                 .pixelformat = V4L2_PIX_FMT_UYVY,
 126                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 127                 .bpp         = 16,
 128                 .dlen        = 16,
 129         },
 130         {
 131                 .desc        = "RGB 565",
 132                 .pixelformat = V4L2_PIX_FMT_RGB565,
 133                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 134                 .bpp         = 16,
 135                 .dlen        = 8,
 136         },
 137         {
 138                 .desc        = "RGB 444",
 139                 .pixelformat = V4L2_PIX_FMT_RGB444,
 140                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 141                 .bpp         = 16,
 142                 .dlen        = 8,
 143         },
 144
 145 };
 146 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 147
 148 static irqreturn_t bcap_isr(int irq, void *dev_id);
 149
 150 static struct bcap_buffer *to_bcap_vb(struct vb2_v4l2_buffer *vb)
 151 {
 152         return container_of(vb, struct bcap_buffer, vb);
 153 }
 154
 155 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 156 {
 157         struct v4l2_subdev_mbus_code_enum code = {
 158                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 159         };
 160         struct bcap_format *sf;
 161         unsigned int num_formats = 0;
 162         int i, j;
 163
 164         while (!v4l2_subdev_call(bcap_dev->sd, pad,
 165                                 enum_mbus_code, NULL, &code)) {
 166                 num_formats++;
 167                 code.index++;
 168         }
 169         if (!num_formats)
 170                 return -ENXIO;
 171
 172         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 173         if (!sf)
 174                 return -ENOMEM;
 175
 176         for (i = 0; i < num_formats; i++) {
 177                 code.index = i;
 178                 v4l2_subdev_call(bcap_dev->sd, pad,
 179                                 enum_mbus_code, NULL, &code);
 180                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 181                         if (code.code == bcap_formats[j].mbus_code)
 182                                 break;
 183                 if (j == BCAP_MAX_FMTS) {
 184                         /* we don't allow this sensor working with our bridge */
 185                         kfree(sf);
 186                         return -EINVAL;
 187                 }
 188                 sf[i] = bcap_formats[j];
 189         }
 190         bcap_dev->sensor_formats = sf;
 191         bcap_dev->num_sensor_formats = num_formats;
 192         return 0;
 193 }
 194
 195 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 196 {
 197         bcap_dev->num_sensor_formats = 0;
 198         kfree(bcap_dev->sensor_formats);
 199         bcap_dev->sensor_formats = NULL;
 200 }
 201
 202 static int bcap_queue_setup(struct vb2_queue *vq,
 203                                 unsigned int *nbuffers, unsigned int *nplanes,
 204                                 unsigned int sizes[], struct device *alloc_devs[])
 205 {
 206         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 207
 208         if (vq->num_buffers + *nbuffers < 2)
 209                 *nbuffers = 2;
 210
 211         if (*nplanes)
 212                 return sizes[0] < bcap_dev->fmt.sizeimage ? -EINVAL : 0;
 213
 214         *nplanes = 1;
 215         sizes[0] = bcap_dev->fmt.sizeimage;
 216
 217         return 0;
 218 }
 219
 220 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 221 {
 222         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 223         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 224         unsigned long size = bcap_dev->fmt.sizeimage;
 225
 226         if (vb2_plane_size(vb, 0) < size) {
 227                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 228                                 vb2_plane_size(vb, 0), size);
 229                 return -EINVAL;
 230         }
 231         vb2_set_plane_payload(vb, 0, size);
 232
 233         vbuf->field = bcap_dev->fmt.field;
 234
 235         return 0;
 236 }
 237
 238 static void bcap_buffer_queue(struct vb2_buffer *vb)
 239 {
 240         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 241         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 242         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 243         unsigned long flags;
 244
 245         spin_lock_irqsave(&bcap_dev->lock, flags);
 246         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 247         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 248 }
 249
 250 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 251 {
 252         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 253         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 254         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 255         unsigned long flags;
 256
 257         spin_lock_irqsave(&bcap_dev->lock, flags);
 258         list_del_init(&buf->list);
 259         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 260 }
 261
 262 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 263 {
 264         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 265         struct ppi_if *ppi = bcap_dev->ppi;
 266         struct bcap_buffer *buf, *tmp;
 267         struct ppi_params params;
 268         dma_addr_t addr;
 269         int ret;
 270
 271         /* enable streamon on the sub device */
 272         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 273         if (ret && (ret != -ENOIOCTLCMD)) {
 274                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 275                 goto err;
 276         }
 277
 278         /* set ppi params */
 279         params.width = bcap_dev->fmt.width;
 280         params.height = bcap_dev->fmt.height;
 281         params.bpp = bcap_dev->bpp;
 282         params.dlen = bcap_dev->dlen;
 283         params.ppi_control = bcap_dev->cfg->ppi_control;
 284         params.int_mask = bcap_dev->cfg->int_mask;
 285         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 286                         & V4L2_IN_CAP_DV_TIMINGS) {
 287                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 288
 289                 params.hdelay = bt->hsync + bt->hbackporch;
 290                 params.vdelay = bt->vsync + bt->vbackporch;
 291                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 292                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 293         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 294                         & V4L2_IN_CAP_STD) {
 295                 params.hdelay = 0;
 296                 params.vdelay = 0;
 297                 if (bcap_dev->std & V4L2_STD_525_60) {
 298                         params.line = 858;
 299                         params.frame = 525;
 300                 } else {
 301                         params.line = 864;
 302                         params.frame = 625;
 303                 }
 304         } else {
 305                 params.hdelay = 0;
 306                 params.vdelay = 0;
 307                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 308                 params.frame = params.height;
 309         }
 310         ret = ppi->ops->set_params(ppi, &params);
 311         if (ret < 0) {
 312                 v4l2_err(&bcap_dev->v4l2_dev,
 313                                 "Error in setting ppi params\n");
 314                 goto err;
 315         }
 316
 317         /* attach ppi DMA irq handler */
 318         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 319         if (ret < 0) {
 320                 v4l2_err(&bcap_dev->v4l2_dev,
 321                                 "Error in attaching interrupt handler\n");
 322                 goto err;
 323         }
 324
 325         bcap_dev->sequence = 0;
 326
 327         reinit_completion(&bcap_dev->comp);
 328         bcap_dev->stop = false;
 329
 330         /* get the next frame from the dma queue */
 331         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 332                                         struct bcap_buffer, list);
 333         /* remove buffer from the dma queue */
 334         list_del_init(&bcap_dev->cur_frm->list);
 335         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
 336                                                 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, 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,
 371                                 VB2_BUF_STATE_ERROR);
 372
 373         while (!list_empty(&bcap_dev->dma_queue)) {
 374                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 375                                                 struct bcap_buffer, list);
 376                 list_del_init(&bcap_dev->cur_frm->list);
 377                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
 378                                 VB2_BUF_STATE_ERROR);
 379         }
 380 }
 381
 382 static struct vb2_ops bcap_video_qops = {
 383         .queue_setup            = bcap_queue_setup,
 384         .buf_prepare            = bcap_buffer_prepare,
 385         .buf_cleanup            = bcap_buffer_cleanup,
 386         .buf_queue              = bcap_buffer_queue,
 387         .wait_prepare           = vb2_ops_wait_prepare,
 388         .wait_finish            = vb2_ops_wait_finish,
 389         .start_streaming        = bcap_start_streaming,
 390         .stop_streaming         = bcap_stop_streaming,
 391 };
 392
 393 static irqreturn_t bcap_isr(int irq, void *dev_id)
 394 {
 395         struct ppi_if *ppi = dev_id;
 396         struct bcap_device *bcap_dev = ppi->priv;
 397         struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
 398         struct vb2_buffer *vb = &vbuf->vb2_buf;
 399         dma_addr_t addr;
 400
 401         spin_lock(&bcap_dev->lock);
 402
 403         if (!list_empty(&bcap_dev->dma_queue)) {
 404                 vb->timestamp = ktime_get_ns();
 405                 if (ppi->err) {
 406                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 407                         ppi->err = false;
 408                 } else {
 409                         vbuf->sequence = bcap_dev->sequence++;
 410                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 411                 }
 412                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 413                                 struct bcap_buffer, list);
 414                 list_del_init(&bcap_dev->cur_frm->list);
 415         } else {
 416                 /* clear error flag, we will get a new frame */
 417                 if (ppi->err)
 418                         ppi->err = false;
 419         }
 420
 421         ppi->ops->stop(ppi);
 422
 423         if (bcap_dev->stop) {
 424                 complete(&bcap_dev->comp);
 425         } else {
 426                 addr = vb2_dma_contig_plane_dma_addr(
 427                                 &bcap_dev->cur_frm->vb.vb2_buf, 0);
 428                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 429                 ppi->ops->start(ppi);
 430         }
 431
 432         spin_unlock(&bcap_dev->lock);
 433
 434         return IRQ_HANDLED;
 435 }
 436
 437 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 438 {
 439         struct bcap_device *bcap_dev = video_drvdata(file);
 440         struct v4l2_input input;
 441
 442         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 443         if (!(input.capabilities & V4L2_IN_CAP_STD))
 444                 return -ENODATA;
 445
 446         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 447 }
 448
 449 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 450 {
 451         struct bcap_device *bcap_dev = video_drvdata(file);
 452         struct v4l2_input input;
 453
 454         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 455         if (!(input.capabilities & V4L2_IN_CAP_STD))
 456                 return -ENODATA;
 457
 458         *std = bcap_dev->std;
 459         return 0;
 460 }
 461
 462 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 463 {
 464         struct bcap_device *bcap_dev = video_drvdata(file);
 465         struct v4l2_input input;
 466         int ret;
 467
 468         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 469         if (!(input.capabilities & V4L2_IN_CAP_STD))
 470                 return -ENODATA;
 471
 472         if (vb2_is_busy(&bcap_dev->buffer_queue))
 473                 return -EBUSY;
 474
 475         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 476         if (ret < 0)
 477                 return ret;
 478
 479         bcap_dev->std = std;
 480         return 0;
 481 }
 482
 483 static int bcap_enum_dv_timings(struct file *file, void *priv,
 484                                 struct v4l2_enum_dv_timings *timings)
 485 {
 486         struct bcap_device *bcap_dev = video_drvdata(file);
 487         struct v4l2_input input;
 488
 489         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 490         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 491                 return -ENODATA;
 492
 493         timings->pad = 0;
 494
 495         return v4l2_subdev_call(bcap_dev->sd, pad,
 496                         enum_dv_timings, timings);
 497 }
 498
 499 static int bcap_query_dv_timings(struct file *file, void *priv,
 500                                 struct v4l2_dv_timings *timings)
 501 {
 502         struct bcap_device *bcap_dev = video_drvdata(file);
 503         struct v4l2_input input;
 504
 505         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 506         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 507                 return -ENODATA;
 508
 509         return v4l2_subdev_call(bcap_dev->sd, video,
 510                                 query_dv_timings, timings);
 511 }
 512
 513 static int bcap_g_dv_timings(struct file *file, void *priv,
 514                                 struct v4l2_dv_timings *timings)
 515 {
 516         struct bcap_device *bcap_dev = video_drvdata(file);
 517         struct v4l2_input input;
 518
 519         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 520         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 521                 return -ENODATA;
 522
 523         *timings = bcap_dev->dv_timings;
 524         return 0;
 525 }
 526
 527 static int bcap_s_dv_timings(struct file *file, void *priv,
 528                                 struct v4l2_dv_timings *timings)
 529 {
 530         struct bcap_device *bcap_dev = video_drvdata(file);
 531         struct v4l2_input input;
 532         int ret;
 533
 534         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 535         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 536                 return -ENODATA;
 537
 538         if (vb2_is_busy(&bcap_dev->buffer_queue))
 539                 return -EBUSY;
 540
 541         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 542         if (ret < 0)
 543                 return ret;
 544
 545         bcap_dev->dv_timings = *timings;
 546         return 0;
 547 }
 548
 549 static int bcap_enum_input(struct file *file, void *priv,
 550                                 struct v4l2_input *input)
 551 {
 552         struct bcap_device *bcap_dev = video_drvdata(file);
 553         struct bfin_capture_config *config = bcap_dev->cfg;
 554         int ret;
 555         u32 status;
 556
 557         if (input->index >= config->num_inputs)
 558                 return -EINVAL;
 559
 560         *input = config->inputs[input->index];
 561         /* get input status */
 562         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 563         if (!ret)
 564                 input->status = status;
 565         return 0;
 566 }
 567
 568 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 569 {
 570         struct bcap_device *bcap_dev = video_drvdata(file);
 571
 572         *index = bcap_dev->cur_input;
 573         return 0;
 574 }
 575
 576 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 577 {
 578         struct bcap_device *bcap_dev = video_drvdata(file);
 579         struct bfin_capture_config *config = bcap_dev->cfg;
 580         struct bcap_route *route;
 581         int ret;
 582
 583         if (vb2_is_busy(&bcap_dev->buffer_queue))
 584                 return -EBUSY;
 585
 586         if (index >= config->num_inputs)
 587                 return -EINVAL;
 588
 589         route = &config->routes[index];
 590         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 591                                 route->input, route->output, 0);
 592         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 593                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 594                 return ret;
 595         }
 596         bcap_dev->cur_input = index;
 597         /* if this route has specific config, update ppi control */
 598         if (route->ppi_control)
 599                 config->ppi_control = route->ppi_control;
 600         return 0;
 601 }
 602
 603 static int bcap_try_format(struct bcap_device *bcap,
 604                                 struct v4l2_pix_format *pixfmt,
 605                                 struct bcap_format *bcap_fmt)
 606 {
 607         struct bcap_format *sf = bcap->sensor_formats;
 608         struct bcap_format *fmt = NULL;
 609         struct v4l2_subdev_pad_config pad_cfg;
 610         struct v4l2_subdev_format format = {
 611                 .which = V4L2_SUBDEV_FORMAT_TRY,
 612         };
 613         int ret, i;
 614
 615         for (i = 0; i < bcap->num_sensor_formats; i++) {
 616                 fmt = &sf[i];
 617                 if (pixfmt->pixelformat == fmt->pixelformat)
 618                         break;
 619         }
 620         if (i == bcap->num_sensor_formats)
 621                 fmt = &sf[0];
 622
 623         v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
 624         ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
 625                                 &format);
 626         if (ret < 0)
 627                 return ret;
 628         v4l2_fill_pix_format(pixfmt, &format.format);
 629         if (bcap_fmt) {
 630                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 631                         fmt = &sf[i];
 632                         if (format.format.code == fmt->mbus_code)
 633                                 break;
 634                 }
 635                 *bcap_fmt = *fmt;
 636         }
 637         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 638         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 639         return 0;
 640 }
 641
 642 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 643                                         struct v4l2_fmtdesc *fmt)
 644 {
 645         struct bcap_device *bcap_dev = video_drvdata(file);
 646         struct bcap_format *sf = bcap_dev->sensor_formats;
 647
 648         if (fmt->index >= bcap_dev->num_sensor_formats)
 649                 return -EINVAL;
 650
 651         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 652         strlcpy(fmt->description,
 653                 sf[fmt->index].desc,
 654                 sizeof(fmt->description));
 655         fmt->pixelformat = sf[fmt->index].pixelformat;
 656         return 0;
 657 }
 658
 659 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 660                                         struct v4l2_format *fmt)
 661 {
 662         struct bcap_device *bcap_dev = video_drvdata(file);
 663         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 664
 665         return bcap_try_format(bcap_dev, pixfmt, NULL);
 666 }
 667
 668 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 669                                 struct v4l2_format *fmt)
 670 {
 671         struct bcap_device *bcap_dev = video_drvdata(file);
 672
 673         fmt->fmt.pix = bcap_dev->fmt;
 674         return 0;
 675 }
 676
 677 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 678                                 struct v4l2_format *fmt)
 679 {
 680         struct bcap_device *bcap_dev = video_drvdata(file);
 681         struct v4l2_subdev_format format = {
 682                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 683         };
 684         struct bcap_format bcap_fmt;
 685         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 686         int ret;
 687
 688         if (vb2_is_busy(&bcap_dev->buffer_queue))
 689                 return -EBUSY;
 690
 691         /* see if format works */
 692         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 693         if (ret < 0)
 694                 return ret;
 695
 696         v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
 697         ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
 698         if (ret < 0)
 699                 return ret;
 700         bcap_dev->fmt = *pixfmt;
 701         bcap_dev->bpp = bcap_fmt.bpp;
 702         bcap_dev->dlen = bcap_fmt.dlen;
 703         return 0;
 704 }
 705
 706 static int bcap_querycap(struct file *file, void  *priv,
 707                                 struct v4l2_capability *cap)
 708 {
 709         struct bcap_device *bcap_dev = video_drvdata(file);
 710
 711         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 712         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 713         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 714         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 715         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 716         return 0;
 717 }
 718
 719 static int bcap_g_parm(struct file *file, void *fh,
 720                                 struct v4l2_streamparm *a)
 721 {
 722         struct bcap_device *bcap_dev = video_drvdata(file);
 723
 724         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 725                 return -EINVAL;
 726         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 727 }
 728
 729 static int bcap_s_parm(struct file *file, void *fh,
 730                                 struct v4l2_streamparm *a)
 731 {
 732         struct bcap_device *bcap_dev = video_drvdata(file);
 733
 734         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 735                 return -EINVAL;
 736         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 737 }
 738
 739 static int bcap_log_status(struct file *file, void *priv)
 740 {
 741         struct bcap_device *bcap_dev = video_drvdata(file);
 742         /* status for sub devices */
 743         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 744         return 0;
 745 }
 746
 747 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 748         .vidioc_querycap         = bcap_querycap,
 749         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 750         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 751         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 752         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 753         .vidioc_enum_input       = bcap_enum_input,
 754         .vidioc_g_input          = bcap_g_input,
 755         .vidioc_s_input          = bcap_s_input,
 756         .vidioc_querystd         = bcap_querystd,
 757         .vidioc_s_std            = bcap_s_std,
 758         .vidioc_g_std            = bcap_g_std,
 759         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 760         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 761         .vidioc_query_dv_timings = bcap_query_dv_timings,
 762         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 763         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
 764         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
 765         .vidioc_querybuf         = vb2_ioctl_querybuf,
 766         .vidioc_qbuf             = vb2_ioctl_qbuf,
 767         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
 768         .vidioc_expbuf           = vb2_ioctl_expbuf,
 769         .vidioc_streamon         = vb2_ioctl_streamon,
 770         .vidioc_streamoff        = vb2_ioctl_streamoff,
 771         .vidioc_g_parm           = bcap_g_parm,
 772         .vidioc_s_parm           = bcap_s_parm,
 773         .vidioc_log_status       = bcap_log_status,
 774 };
 775
 776 static struct v4l2_file_operations bcap_fops = {
 777         .owner = THIS_MODULE,
 778         .open = v4l2_fh_open,
 779         .release = vb2_fop_release,
 780         .unlocked_ioctl = video_ioctl2,
 781         .mmap = vb2_fop_mmap,
 782 #ifndef CONFIG_MMU
 783         .get_unmapped_area = vb2_fop_get_unmapped_area,
 784 #endif
 785         .poll = vb2_fop_poll
 786 };
 787
 788 static int bcap_probe(struct platform_device *pdev)
 789 {
 790         struct bcap_device *bcap_dev;
 791         struct video_device *vfd;
 792         struct i2c_adapter *i2c_adap;
 793         struct bfin_capture_config *config;
 794         struct vb2_queue *q;
 795         struct bcap_route *route;
 796         int ret;
 797
 798         config = pdev->dev.platform_data;
 799         if (!config || !config->num_inputs) {
 800                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 801                 return -ENODEV;
 802         }
 803
 804         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 805         if (!bcap_dev) {
 806                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 807                 return -ENOMEM;
 808         }
 809
 810         bcap_dev->cfg = config;
 811
 812         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 813         if (!bcap_dev->ppi) {
 814                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 815                 ret = -ENODEV;
 816                 goto err_free_dev;
 817         }
 818         bcap_dev->ppi->priv = bcap_dev;
 819
 820         vfd = &bcap_dev->video_dev;
 821         /* initialize field of video device */
 822         vfd->release            = video_device_release_empty;
 823         vfd->fops               = &bcap_fops;
 824         vfd->ioctl_ops          = &bcap_ioctl_ops;
 825         vfd->tvnorms            = 0;
 826         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 827         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 828
 829         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 830         if (ret) {
 831                 v4l2_err(pdev->dev.driver,
 832                                 "Unable to register v4l2 device\n");
 833                 goto err_free_ppi;
 834         }
 835         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 836
 837         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 838         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 839         if (ret) {
 840                 v4l2_err(&bcap_dev->v4l2_dev,
 841                                 "Unable to init control handler\n");
 842                 goto err_unreg_v4l2;
 843         }
 844
 845         spin_lock_init(&bcap_dev->lock);
 846         /* initialize queue */
 847         q = &bcap_dev->buffer_queue;
 848         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 849         q->io_modes = VB2_MMAP | VB2_DMABUF;
 850         q->drv_priv = bcap_dev;
 851         q->buf_struct_size = sizeof(struct bcap_buffer);
 852         q->ops = &bcap_video_qops;
 853         q->mem_ops = &vb2_dma_contig_memops;
 854         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 855         q->lock = &bcap_dev->mutex;
 856         q->min_buffers_needed = 1;
 857         q->dev = &pdev->dev;
 858
 859         ret = vb2_queue_init(q);
 860         if (ret)
 861                 goto err_free_handler;
 862
 863         mutex_init(&bcap_dev->mutex);
 864         init_completion(&bcap_dev->comp);
 865
 866         /* init video dma queues */
 867         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 868
 869         vfd->lock = &bcap_dev->mutex;
 870         vfd->queue = q;
 871
 872         /* register video device */
 873         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 874         if (ret) {
 875                 v4l2_err(&bcap_dev->v4l2_dev,
 876                                 "Unable to register video device\n");
 877                 goto err_free_handler;
 878         }
 879         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
 880         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 881                         video_device_node_name(vfd));
 882
 883         /* load up the subdevice */
 884         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 885         if (!i2c_adap) {
 886                 v4l2_err(&bcap_dev->v4l2_dev,
 887                                 "Unable to find i2c adapter\n");
 888                 ret = -ENODEV;
 889                 goto err_unreg_vdev;
 890
 891         }
 892         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 893                                                  i2c_adap,
 894                                                  &config->board_info,
 895                                                  NULL);
 896         if (bcap_dev->sd) {
 897                 int i;
 898
 899                 /* update tvnorms from the sub devices */
 900                 for (i = 0; i < config->num_inputs; i++)
 901                         vfd->tvnorms |= config->inputs[i].std;
 902         } else {
 903                 v4l2_err(&bcap_dev->v4l2_dev,
 904                                 "Unable to register sub device\n");
 905                 ret = -ENODEV;
 906                 goto err_unreg_vdev;
 907         }
 908
 909         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 910
 911         /*
 912          * explicitly set input, otherwise some boards
 913          * may not work at the state as we expected
 914          */
 915         route = &config->routes[0];
 916         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 917                                 route->input, route->output, 0);
 918         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 919                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 920                 goto err_unreg_vdev;
 921         }
 922         bcap_dev->cur_input = 0;
 923         /* if this route has specific config, update ppi control */
 924         if (route->ppi_control)
 925                 config->ppi_control = route->ppi_control;
 926
 927         /* now we can probe the default state */
 928         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
 929                 v4l2_std_id std;
 930                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
 931                 if (ret) {
 932                         v4l2_err(&bcap_dev->v4l2_dev,
 933                                         "Unable to get std\n");
 934                         goto err_unreg_vdev;
 935                 }
 936                 bcap_dev->std = std;
 937         }
 938         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
 939                 struct v4l2_dv_timings dv_timings;
 940                 ret = v4l2_subdev_call(bcap_dev->sd, video,
 941                                 g_dv_timings, &dv_timings);
 942                 if (ret) {
 943                         v4l2_err(&bcap_dev->v4l2_dev,
 944                                         "Unable to get dv timings\n");
 945                         goto err_unreg_vdev;
 946                 }
 947                 bcap_dev->dv_timings = dv_timings;
 948         }
 949         ret = bcap_init_sensor_formats(bcap_dev);
 950         if (ret) {
 951                 v4l2_err(&bcap_dev->v4l2_dev,
 952                                 "Unable to create sensor formats table\n");
 953                 goto err_unreg_vdev;
 954         }
 955         return 0;
 956 err_unreg_vdev:
 957         video_unregister_device(&bcap_dev->video_dev);
 958 err_free_handler:
 959         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 960 err_unreg_v4l2:
 961         v4l2_device_unregister(&bcap_dev->v4l2_dev);
 962 err_free_ppi:
 963         ppi_delete_instance(bcap_dev->ppi);
 964 err_free_dev:
 965         kfree(bcap_dev);
 966         return ret;
 967 }
 968
 969 static int bcap_remove(struct platform_device *pdev)
 970 {
 971         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
 972         struct bcap_device *bcap_dev = container_of(v4l2_dev,
 973                                                 struct bcap_device, v4l2_dev);
 974
 975         bcap_free_sensor_formats(bcap_dev);
 976         video_unregister_device(&bcap_dev->video_dev);
 977         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 978         v4l2_device_unregister(v4l2_dev);
 979         ppi_delete_instance(bcap_dev->ppi);
 980         kfree(bcap_dev);
 981         return 0;
 982 }
 983
 984 static struct platform_driver bcap_driver = {
 985         .driver = {
 986                 .name  = CAPTURE_DRV_NAME,
 987         },
 988         .probe = bcap_probe,
 989         .remove = bcap_remove,
 990 };
 991 module_platform_driver(bcap_driver);
 992
 993 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
 994 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
 995 MODULE_LICENSE("GPL v2");