drivers/media/platform/blackfin/bfin_capture.c

   1 /*
   2  * Analog Devices video capture driver
   3  *
   4  * Copyright (c) 2011 Analog Devices Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/completion.h>
  21 #include <linux/delay.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/i2c.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/io.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/slab.h>
  32 #include <linux/time.h>
  33 #include <linux/types.h>
  34
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-ctrls.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-ioctl.h>
  39 #include <media/videobuf2-dma-contig.h>
  40
  41 #include <asm/dma.h>
  42
  43 #include <media/blackfin/bfin_capture.h>
  44 #include <media/blackfin/ppi.h>
  45
  46 #define CAPTURE_DRV_NAME        "bfin_capture"
  47 #define BCAP_MIN_NUM_BUF        2
  48
  49 struct bcap_format {
  50         char *desc;
  51         u32 pixelformat;
  52         u32 mbus_code;
  53         int bpp; /* bits per pixel */
  54         int dlen; /* data length for ppi in bits */
  55 };
  56
  57 struct bcap_buffer {
  58         struct vb2_buffer vb;
  59         struct list_head list;
  60 };
  61
  62 struct bcap_device {
  63         /* capture device instance */
  64         struct v4l2_device v4l2_dev;
  65         /* v4l2 control handler */
  66         struct v4l2_ctrl_handler ctrl_handler;
  67         /* device node data */
  68         struct video_device *video_dev;
  69         /* sub device instance */
  70         struct v4l2_subdev *sd;
  71         /* capture config */
  72         struct bfin_capture_config *cfg;
  73         /* ppi interface */
  74         struct ppi_if *ppi;
  75         /* current input */
  76         unsigned int cur_input;
  77         /* current selected standard */
  78         v4l2_std_id std;
  79         /* current selected dv_timings */
  80         struct v4l2_dv_timings dv_timings;
  81         /* used to store pixel format */
  82         struct v4l2_pix_format fmt;
  83         /* bits per pixel*/
  84         int bpp;
  85         /* data length for ppi in bits */
  86         int dlen;
  87         /* used to store sensor supported format */
  88         struct bcap_format *sensor_formats;
  89         /* number of sensor formats array */
  90         int num_sensor_formats;
  91         /* pointing to current video buffer */
  92         struct bcap_buffer *cur_frm;
  93         /* buffer queue used in videobuf2 */
  94         struct vb2_queue buffer_queue;
  95         /* allocator-specific contexts for each plane */
  96         struct vb2_alloc_ctx *alloc_ctx;
  97         /* queue of filled frames */
  98         struct list_head dma_queue;
  99         /* used in videobuf2 callback */
 100         spinlock_t lock;
 101         /* used to access capture device */
 102         struct mutex mutex;
 103         /* used to wait ppi to complete one transfer */
 104         struct completion comp;
 105         /* prepare to stop */
 106         bool stop;
 107 };
 108
 109 struct bcap_fh {
 110         struct v4l2_fh fh;
 111         /* indicates whether this file handle is doing IO */
 112         bool io_allowed;
 113 };
 114
 115 static const struct bcap_format bcap_formats[] = {
 116         {
 117                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 118                 .pixelformat = V4L2_PIX_FMT_UYVY,
 119                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 120                 .bpp         = 16,
 121                 .dlen        = 8,
 122         },
 123         {
 124                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 125                 .pixelformat = V4L2_PIX_FMT_YUYV,
 126                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 127                 .bpp         = 16,
 128                 .dlen        = 8,
 129         },
 130         {
 131                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 132                 .pixelformat = V4L2_PIX_FMT_UYVY,
 133                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 134                 .bpp         = 16,
 135                 .dlen        = 16,
 136         },
 137         {
 138                 .desc        = "RGB 565",
 139                 .pixelformat = V4L2_PIX_FMT_RGB565,
 140                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 141                 .bpp         = 16,
 142                 .dlen        = 8,
 143         },
 144         {
 145                 .desc        = "RGB 444",
 146                 .pixelformat = V4L2_PIX_FMT_RGB444,
 147                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 148                 .bpp         = 16,
 149                 .dlen        = 8,
 150         },
 151
 152 };
 153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 154
 155 static irqreturn_t bcap_isr(int irq, void *dev_id);
 156
 157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 158 {
 159         return container_of(vb, struct bcap_buffer, vb);
 160 }
 161
 162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 163 {
 164         u32 code;
 165         struct bcap_format *sf;
 166         unsigned int num_formats = 0;
 167         int i, j;
 168
 169         while (!v4l2_subdev_call(bcap_dev->sd, video,
 170                                 enum_mbus_fmt, num_formats, &code))
 171                 num_formats++;
 172         if (!num_formats)
 173                 return -ENXIO;
 174
 175         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 176         if (!sf)
 177                 return -ENOMEM;
 178
 179         for (i = 0; i < num_formats; i++) {
 180                 v4l2_subdev_call(bcap_dev->sd, video,
 181                                 enum_mbus_fmt, i, &code);
 182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 183                         if (code == bcap_formats[j].mbus_code)
 184                                 break;
 185                 if (j == BCAP_MAX_FMTS) {
 186                         /* we don't allow this sensor working with our bridge */
 187                         kfree(sf);
 188                         return -EINVAL;
 189                 }
 190                 sf[i] = bcap_formats[j];
 191         }
 192         bcap_dev->sensor_formats = sf;
 193         bcap_dev->num_sensor_formats = num_formats;
 194         return 0;
 195 }
 196
 197 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 198 {
 199         bcap_dev->num_sensor_formats = 0;
 200         kfree(bcap_dev->sensor_formats);
 201         bcap_dev->sensor_formats = NULL;
 202 }
 203
 204 static int bcap_open(struct file *file)
 205 {
 206         struct bcap_device *bcap_dev = video_drvdata(file);
 207         struct video_device *vfd = bcap_dev->video_dev;
 208         struct bcap_fh *bcap_fh;
 209
 210         if (!bcap_dev->sd) {
 211                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
 212                 return -ENODEV;
 213         }
 214
 215         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
 216         if (!bcap_fh) {
 217                 v4l2_err(&bcap_dev->v4l2_dev,
 218                          "unable to allocate memory for file handle object\n");
 219                 return -ENOMEM;
 220         }
 221
 222         v4l2_fh_init(&bcap_fh->fh, vfd);
 223
 224         /* store pointer to v4l2_fh in private_data member of file */
 225         file->private_data = &bcap_fh->fh;
 226         v4l2_fh_add(&bcap_fh->fh);
 227         bcap_fh->io_allowed = false;
 228         return 0;
 229 }
 230
 231 static int bcap_release(struct file *file)
 232 {
 233         struct bcap_device *bcap_dev = video_drvdata(file);
 234         struct v4l2_fh *fh = file->private_data;
 235         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 236
 237         /* if this instance is doing IO */
 238         if (bcap_fh->io_allowed)
 239                 vb2_queue_release(&bcap_dev->buffer_queue);
 240
 241         file->private_data = NULL;
 242         v4l2_fh_del(&bcap_fh->fh);
 243         v4l2_fh_exit(&bcap_fh->fh);
 244         kfree(bcap_fh);
 245         return 0;
 246 }
 247
 248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
 249 {
 250         struct bcap_device *bcap_dev = video_drvdata(file);
 251         int ret;
 252
 253         if (mutex_lock_interruptible(&bcap_dev->mutex))
 254                 return -ERESTARTSYS;
 255         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
 256         mutex_unlock(&bcap_dev->mutex);
 257         return ret;
 258 }
 259
 260 #ifndef CONFIG_MMU
 261 static unsigned long bcap_get_unmapped_area(struct file *file,
 262                                             unsigned long addr,
 263                                             unsigned long len,
 264                                             unsigned long pgoff,
 265                                             unsigned long flags)
 266 {
 267         struct bcap_device *bcap_dev = video_drvdata(file);
 268
 269         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
 270                                      addr,
 271                                      len,
 272                                      pgoff,
 273                                      flags);
 274 }
 275 #endif
 276
 277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
 278 {
 279         struct bcap_device *bcap_dev = video_drvdata(file);
 280         unsigned int res;
 281
 282         mutex_lock(&bcap_dev->mutex);
 283         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
 284         mutex_unlock(&bcap_dev->mutex);
 285         return res;
 286 }
 287
 288 static int bcap_queue_setup(struct vb2_queue *vq,
 289                                 const struct v4l2_format *fmt,
 290                                 unsigned int *nbuffers, unsigned int *nplanes,
 291                                 unsigned int sizes[], void *alloc_ctxs[])
 292 {
 293         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 294
 295         if (*nbuffers < BCAP_MIN_NUM_BUF)
 296                 *nbuffers = BCAP_MIN_NUM_BUF;
 297
 298         *nplanes = 1;
 299         sizes[0] = bcap_dev->fmt.sizeimage;
 300         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 301
 302         return 0;
 303 }
 304
 305 static int bcap_buffer_init(struct vb2_buffer *vb)
 306 {
 307         struct bcap_buffer *buf = to_bcap_vb(vb);
 308
 309         INIT_LIST_HEAD(&buf->list);
 310         return 0;
 311 }
 312
 313 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 314 {
 315         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 316         struct bcap_buffer *buf = to_bcap_vb(vb);
 317         unsigned long size;
 318
 319         size = bcap_dev->fmt.sizeimage;
 320         if (vb2_plane_size(vb, 0) < size) {
 321                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 322                                 vb2_plane_size(vb, 0), size);
 323                 return -EINVAL;
 324         }
 325         vb2_set_plane_payload(&buf->vb, 0, size);
 326
 327         return 0;
 328 }
 329
 330 static void bcap_buffer_queue(struct vb2_buffer *vb)
 331 {
 332         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 333         struct bcap_buffer *buf = to_bcap_vb(vb);
 334         unsigned long flags;
 335
 336         spin_lock_irqsave(&bcap_dev->lock, flags);
 337         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 338         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 339 }
 340
 341 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 342 {
 343         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 344         struct bcap_buffer *buf = to_bcap_vb(vb);
 345         unsigned long flags;
 346
 347         spin_lock_irqsave(&bcap_dev->lock, flags);
 348         list_del_init(&buf->list);
 349         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 350 }
 351
 352 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 353 {
 354         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 355         struct ppi_if *ppi = bcap_dev->ppi;
 356         struct ppi_params params;
 357         int ret;
 358
 359         /* enable streamon on the sub device */
 360         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 361         if (ret && (ret != -ENOIOCTLCMD)) {
 362                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 363                 return ret;
 364         }
 365
 366         /* set ppi params */
 367         params.width = bcap_dev->fmt.width;
 368         params.height = bcap_dev->fmt.height;
 369         params.bpp = bcap_dev->bpp;
 370         params.dlen = bcap_dev->dlen;
 371         params.ppi_control = bcap_dev->cfg->ppi_control;
 372         params.int_mask = bcap_dev->cfg->int_mask;
 373         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 374                         & V4L2_IN_CAP_DV_TIMINGS) {
 375                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 376
 377                 params.hdelay = bt->hsync + bt->hbackporch;
 378                 params.vdelay = bt->vsync + bt->vbackporch;
 379                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 380                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 381         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 382                         & V4L2_IN_CAP_STD) {
 383                 params.hdelay = 0;
 384                 params.vdelay = 0;
 385                 if (bcap_dev->std & V4L2_STD_525_60) {
 386                         params.line = 858;
 387                         params.frame = 525;
 388                 } else {
 389                         params.line = 864;
 390                         params.frame = 625;
 391                 }
 392         } else {
 393                 params.hdelay = 0;
 394                 params.vdelay = 0;
 395                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 396                 params.frame = params.height;
 397         }
 398         ret = ppi->ops->set_params(ppi, &params);
 399         if (ret < 0) {
 400                 v4l2_err(&bcap_dev->v4l2_dev,
 401                                 "Error in setting ppi params\n");
 402                 return ret;
 403         }
 404
 405         /* attach ppi DMA irq handler */
 406         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 407         if (ret < 0) {
 408                 v4l2_err(&bcap_dev->v4l2_dev,
 409                                 "Error in attaching interrupt handler\n");
 410                 return ret;
 411         }
 412
 413         reinit_completion(&bcap_dev->comp);
 414         bcap_dev->stop = false;
 415         return 0;
 416 }
 417
 418 static void bcap_stop_streaming(struct vb2_queue *vq)
 419 {
 420         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 421         struct ppi_if *ppi = bcap_dev->ppi;
 422         int ret;
 423
 424         bcap_dev->stop = true;
 425         wait_for_completion(&bcap_dev->comp);
 426         ppi->ops->stop(ppi);
 427         ppi->ops->detach_irq(ppi);
 428         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 429         if (ret && (ret != -ENOIOCTLCMD))
 430                 v4l2_err(&bcap_dev->v4l2_dev,
 431                                 "stream off failed in subdev\n");
 432
 433         /* release all active buffers */
 434         while (!list_empty(&bcap_dev->dma_queue)) {
 435                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 436                                                 struct bcap_buffer, list);
 437                 list_del_init(&bcap_dev->cur_frm->list);
 438                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 439         }
 440 }
 441
 442 static struct vb2_ops bcap_video_qops = {
 443         .queue_setup            = bcap_queue_setup,
 444         .buf_init               = bcap_buffer_init,
 445         .buf_prepare            = bcap_buffer_prepare,
 446         .buf_cleanup            = bcap_buffer_cleanup,
 447         .buf_queue              = bcap_buffer_queue,
 448         .wait_prepare           = vb2_ops_wait_prepare,
 449         .wait_finish            = vb2_ops_wait_finish,
 450         .start_streaming        = bcap_start_streaming,
 451         .stop_streaming         = bcap_stop_streaming,
 452 };
 453
 454 static int bcap_reqbufs(struct file *file, void *priv,
 455                         struct v4l2_requestbuffers *req_buf)
 456 {
 457         struct bcap_device *bcap_dev = video_drvdata(file);
 458         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 459         struct v4l2_fh *fh = file->private_data;
 460         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 461
 462         if (vb2_is_busy(vq))
 463                 return -EBUSY;
 464
 465         bcap_fh->io_allowed = true;
 466
 467         return vb2_reqbufs(vq, req_buf);
 468 }
 469
 470 static int bcap_querybuf(struct file *file, void *priv,
 471                                 struct v4l2_buffer *buf)
 472 {
 473         struct bcap_device *bcap_dev = video_drvdata(file);
 474
 475         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 476 }
 477
 478 static int bcap_qbuf(struct file *file, void *priv,
 479                         struct v4l2_buffer *buf)
 480 {
 481         struct bcap_device *bcap_dev = video_drvdata(file);
 482         struct v4l2_fh *fh = file->private_data;
 483         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 484
 485         if (!bcap_fh->io_allowed)
 486                 return -EBUSY;
 487
 488         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 489 }
 490
 491 static int bcap_dqbuf(struct file *file, void *priv,
 492                         struct v4l2_buffer *buf)
 493 {
 494         struct bcap_device *bcap_dev = video_drvdata(file);
 495         struct v4l2_fh *fh = file->private_data;
 496         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 497
 498         if (!bcap_fh->io_allowed)
 499                 return -EBUSY;
 500
 501         return vb2_dqbuf(&bcap_dev->buffer_queue,
 502                                 buf, file->f_flags & O_NONBLOCK);
 503 }
 504
 505 static irqreturn_t bcap_isr(int irq, void *dev_id)
 506 {
 507         struct ppi_if *ppi = dev_id;
 508         struct bcap_device *bcap_dev = ppi->priv;
 509         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 510         dma_addr_t addr;
 511
 512         spin_lock(&bcap_dev->lock);
 513
 514         if (!list_empty(&bcap_dev->dma_queue)) {
 515                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 516                 if (ppi->err) {
 517                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 518                         ppi->err = false;
 519                 } else {
 520                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 521                 }
 522                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 523                                 struct bcap_buffer, list);
 524                 list_del_init(&bcap_dev->cur_frm->list);
 525         } else {
 526                 /* clear error flag, we will get a new frame */
 527                 if (ppi->err)
 528                         ppi->err = false;
 529         }
 530
 531         ppi->ops->stop(ppi);
 532
 533         if (bcap_dev->stop) {
 534                 complete(&bcap_dev->comp);
 535         } else {
 536                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 537                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 538                 ppi->ops->start(ppi);
 539         }
 540
 541         spin_unlock(&bcap_dev->lock);
 542
 543         return IRQ_HANDLED;
 544 }
 545
 546 static int bcap_streamon(struct file *file, void *priv,
 547                                 enum v4l2_buf_type buf_type)
 548 {
 549         struct bcap_device *bcap_dev = video_drvdata(file);
 550         struct bcap_fh *fh = file->private_data;
 551         struct ppi_if *ppi = bcap_dev->ppi;
 552         dma_addr_t addr;
 553         int ret;
 554
 555         if (!fh->io_allowed)
 556                 return -EBUSY;
 557
 558         /* call streamon to start streaming in videobuf */
 559         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 560         if (ret)
 561                 return ret;
 562
 563         /* if dma queue is empty, return error */
 564         if (list_empty(&bcap_dev->dma_queue)) {
 565                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 566                 ret = -EINVAL;
 567                 goto err;
 568         }
 569
 570         /* get the next frame from the dma queue */
 571         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 572                                         struct bcap_buffer, list);
 573         /* remove buffer from the dma queue */
 574         list_del_init(&bcap_dev->cur_frm->list);
 575         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 576         /* update DMA address */
 577         ppi->ops->update_addr(ppi, (unsigned long)addr);
 578         /* enable ppi */
 579         ppi->ops->start(ppi);
 580
 581         return 0;
 582 err:
 583         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 584         return ret;
 585 }
 586
 587 static int bcap_streamoff(struct file *file, void *priv,
 588                                 enum v4l2_buf_type buf_type)
 589 {
 590         struct bcap_device *bcap_dev = video_drvdata(file);
 591         struct bcap_fh *fh = file->private_data;
 592
 593         if (!fh->io_allowed)
 594                 return -EBUSY;
 595
 596         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 597 }
 598
 599 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 600 {
 601         struct bcap_device *bcap_dev = video_drvdata(file);
 602
 603         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 604 }
 605
 606 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 607 {
 608         struct bcap_device *bcap_dev = video_drvdata(file);
 609
 610         *std = bcap_dev->std;
 611         return 0;
 612 }
 613
 614 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 615 {
 616         struct bcap_device *bcap_dev = video_drvdata(file);
 617         int ret;
 618
 619         if (vb2_is_busy(&bcap_dev->buffer_queue))
 620                 return -EBUSY;
 621
 622         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 623         if (ret < 0)
 624                 return ret;
 625
 626         bcap_dev->std = std;
 627         return 0;
 628 }
 629
 630 static int bcap_enum_dv_timings(struct file *file, void *priv,
 631                                 struct v4l2_enum_dv_timings *timings)
 632 {
 633         struct bcap_device *bcap_dev = video_drvdata(file);
 634
 635         timings->pad = 0;
 636
 637         return v4l2_subdev_call(bcap_dev->sd, pad,
 638                         enum_dv_timings, timings);
 639 }
 640
 641 static int bcap_query_dv_timings(struct file *file, void *priv,
 642                                 struct v4l2_dv_timings *timings)
 643 {
 644         struct bcap_device *bcap_dev = video_drvdata(file);
 645
 646         return v4l2_subdev_call(bcap_dev->sd, video,
 647                                 query_dv_timings, timings);
 648 }
 649
 650 static int bcap_g_dv_timings(struct file *file, void *priv,
 651                                 struct v4l2_dv_timings *timings)
 652 {
 653         struct bcap_device *bcap_dev = video_drvdata(file);
 654
 655         *timings = bcap_dev->dv_timings;
 656         return 0;
 657 }
 658
 659 static int bcap_s_dv_timings(struct file *file, void *priv,
 660                                 struct v4l2_dv_timings *timings)
 661 {
 662         struct bcap_device *bcap_dev = video_drvdata(file);
 663         int ret;
 664         if (vb2_is_busy(&bcap_dev->buffer_queue))
 665                 return -EBUSY;
 666
 667         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 668         if (ret < 0)
 669                 return ret;
 670
 671         bcap_dev->dv_timings = *timings;
 672         return 0;
 673 }
 674
 675 static int bcap_enum_input(struct file *file, void *priv,
 676                                 struct v4l2_input *input)
 677 {
 678         struct bcap_device *bcap_dev = video_drvdata(file);
 679         struct bfin_capture_config *config = bcap_dev->cfg;
 680         int ret;
 681         u32 status;
 682
 683         if (input->index >= config->num_inputs)
 684                 return -EINVAL;
 685
 686         *input = config->inputs[input->index];
 687         /* get input status */
 688         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 689         if (!ret)
 690                 input->status = status;
 691         return 0;
 692 }
 693
 694 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 695 {
 696         struct bcap_device *bcap_dev = video_drvdata(file);
 697
 698         *index = bcap_dev->cur_input;
 699         return 0;
 700 }
 701
 702 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 703 {
 704         struct bcap_device *bcap_dev = video_drvdata(file);
 705         struct bfin_capture_config *config = bcap_dev->cfg;
 706         struct bcap_route *route;
 707         int ret;
 708
 709         if (vb2_is_busy(&bcap_dev->buffer_queue))
 710                 return -EBUSY;
 711
 712         if (index >= config->num_inputs)
 713                 return -EINVAL;
 714
 715         route = &config->routes[index];
 716         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 717                                 route->input, route->output, 0);
 718         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 719                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 720                 return ret;
 721         }
 722         bcap_dev->cur_input = index;
 723         /* if this route has specific config, update ppi control */
 724         if (route->ppi_control)
 725                 config->ppi_control = route->ppi_control;
 726         return 0;
 727 }
 728
 729 static int bcap_try_format(struct bcap_device *bcap,
 730                                 struct v4l2_pix_format *pixfmt,
 731                                 struct bcap_format *bcap_fmt)
 732 {
 733         struct bcap_format *sf = bcap->sensor_formats;
 734         struct bcap_format *fmt = NULL;
 735         struct v4l2_mbus_framefmt mbus_fmt;
 736         int ret, i;
 737
 738         for (i = 0; i < bcap->num_sensor_formats; i++) {
 739                 fmt = &sf[i];
 740                 if (pixfmt->pixelformat == fmt->pixelformat)
 741                         break;
 742         }
 743         if (i == bcap->num_sensor_formats)
 744                 fmt = &sf[0];
 745
 746         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 747         ret = v4l2_subdev_call(bcap->sd, video,
 748                                 try_mbus_fmt, &mbus_fmt);
 749         if (ret < 0)
 750                 return ret;
 751         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 752         if (bcap_fmt) {
 753                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 754                         fmt = &sf[i];
 755                         if (mbus_fmt.code == fmt->mbus_code)
 756                                 break;
 757                 }
 758                 *bcap_fmt = *fmt;
 759         }
 760         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 761         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 762         return 0;
 763 }
 764
 765 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 766                                         struct v4l2_fmtdesc *fmt)
 767 {
 768         struct bcap_device *bcap_dev = video_drvdata(file);
 769         struct bcap_format *sf = bcap_dev->sensor_formats;
 770
 771         if (fmt->index >= bcap_dev->num_sensor_formats)
 772                 return -EINVAL;
 773
 774         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 775         strlcpy(fmt->description,
 776                 sf[fmt->index].desc,
 777                 sizeof(fmt->description));
 778         fmt->pixelformat = sf[fmt->index].pixelformat;
 779         return 0;
 780 }
 781
 782 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 783                                         struct v4l2_format *fmt)
 784 {
 785         struct bcap_device *bcap_dev = video_drvdata(file);
 786         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 787
 788         return bcap_try_format(bcap_dev, pixfmt, NULL);
 789 }
 790
 791 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 792                                 struct v4l2_format *fmt)
 793 {
 794         struct bcap_device *bcap_dev = video_drvdata(file);
 795
 796         fmt->fmt.pix = bcap_dev->fmt;
 797         return 0;
 798 }
 799
 800 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 801                                 struct v4l2_format *fmt)
 802 {
 803         struct bcap_device *bcap_dev = video_drvdata(file);
 804         struct v4l2_mbus_framefmt mbus_fmt;
 805         struct bcap_format bcap_fmt;
 806         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 807         int ret;
 808
 809         if (vb2_is_busy(&bcap_dev->buffer_queue))
 810                 return -EBUSY;
 811
 812         /* see if format works */
 813         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 814         if (ret < 0)
 815                 return ret;
 816
 817         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 818         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 819         if (ret < 0)
 820                 return ret;
 821         bcap_dev->fmt = *pixfmt;
 822         bcap_dev->bpp = bcap_fmt.bpp;
 823         bcap_dev->dlen = bcap_fmt.dlen;
 824         return 0;
 825 }
 826
 827 static int bcap_querycap(struct file *file, void  *priv,
 828                                 struct v4l2_capability *cap)
 829 {
 830         struct bcap_device *bcap_dev = video_drvdata(file);
 831
 832         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 833         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 834         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 835         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 836         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 837         return 0;
 838 }
 839
 840 static int bcap_g_parm(struct file *file, void *fh,
 841                                 struct v4l2_streamparm *a)
 842 {
 843         struct bcap_device *bcap_dev = video_drvdata(file);
 844
 845         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 846                 return -EINVAL;
 847         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 848 }
 849
 850 static int bcap_s_parm(struct file *file, void *fh,
 851                                 struct v4l2_streamparm *a)
 852 {
 853         struct bcap_device *bcap_dev = video_drvdata(file);
 854
 855         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 856                 return -EINVAL;
 857         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 858 }
 859
 860 static int bcap_log_status(struct file *file, void *priv)
 861 {
 862         struct bcap_device *bcap_dev = video_drvdata(file);
 863         /* status for sub devices */
 864         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 865         return 0;
 866 }
 867
 868 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 869         .vidioc_querycap         = bcap_querycap,
 870         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 871         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 872         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 873         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 874         .vidioc_enum_input       = bcap_enum_input,
 875         .vidioc_g_input          = bcap_g_input,
 876         .vidioc_s_input          = bcap_s_input,
 877         .vidioc_querystd         = bcap_querystd,
 878         .vidioc_s_std            = bcap_s_std,
 879         .vidioc_g_std            = bcap_g_std,
 880         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 881         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 882         .vidioc_query_dv_timings = bcap_query_dv_timings,
 883         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 884         .vidioc_reqbufs          = bcap_reqbufs,
 885         .vidioc_querybuf         = bcap_querybuf,
 886         .vidioc_qbuf             = bcap_qbuf,
 887         .vidioc_dqbuf            = bcap_dqbuf,
 888         .vidioc_streamon         = bcap_streamon,
 889         .vidioc_streamoff        = bcap_streamoff,
 890         .vidioc_g_parm           = bcap_g_parm,
 891         .vidioc_s_parm           = bcap_s_parm,
 892         .vidioc_log_status       = bcap_log_status,
 893 };
 894
 895 static struct v4l2_file_operations bcap_fops = {
 896         .owner = THIS_MODULE,
 897         .open = bcap_open,
 898         .release = bcap_release,
 899         .unlocked_ioctl = video_ioctl2,
 900         .mmap = bcap_mmap,
 901 #ifndef CONFIG_MMU
 902         .get_unmapped_area = bcap_get_unmapped_area,
 903 #endif
 904         .poll = bcap_poll
 905 };
 906
 907 static int bcap_probe(struct platform_device *pdev)
 908 {
 909         struct bcap_device *bcap_dev;
 910         struct video_device *vfd;
 911         struct i2c_adapter *i2c_adap;
 912         struct bfin_capture_config *config;
 913         struct vb2_queue *q;
 914         struct bcap_route *route;
 915         int ret;
 916
 917         config = pdev->dev.platform_data;
 918         if (!config || !config->num_inputs) {
 919                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 920                 return -ENODEV;
 921         }
 922
 923         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 924         if (!bcap_dev) {
 925                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 926                 return -ENOMEM;
 927         }
 928
 929         bcap_dev->cfg = config;
 930
 931         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 932         if (!bcap_dev->ppi) {
 933                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 934                 ret = -ENODEV;
 935                 goto err_free_dev;
 936         }
 937         bcap_dev->ppi->priv = bcap_dev;
 938
 939         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 940         if (IS_ERR(bcap_dev->alloc_ctx)) {
 941                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 942                 goto err_free_ppi;
 943         }
 944
 945         vfd = video_device_alloc();
 946         if (!vfd) {
 947                 ret = -ENOMEM;
 948                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 949                 goto err_cleanup_ctx;
 950         }
 951
 952         /* initialize field of video device */
 953         vfd->release            = video_device_release;
 954         vfd->fops               = &bcap_fops;
 955         vfd->ioctl_ops          = &bcap_ioctl_ops;
 956         vfd->tvnorms            = 0;
 957         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 958         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 959         bcap_dev->video_dev     = vfd;
 960
 961         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 962         if (ret) {
 963                 v4l2_err(pdev->dev.driver,
 964                                 "Unable to register v4l2 device\n");
 965                 goto err_release_vdev;
 966         }
 967         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 968
 969         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 970         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 971         if (ret) {
 972                 v4l2_err(&bcap_dev->v4l2_dev,
 973                                 "Unable to init control handler\n");
 974                 goto err_unreg_v4l2;
 975         }
 976
 977         spin_lock_init(&bcap_dev->lock);
 978         /* initialize queue */
 979         q = &bcap_dev->buffer_queue;
 980         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 981         q->io_modes = VB2_MMAP;
 982         q->drv_priv = bcap_dev;
 983         q->buf_struct_size = sizeof(struct bcap_buffer);
 984         q->ops = &bcap_video_qops;
 985         q->mem_ops = &vb2_dma_contig_memops;
 986         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 987         q->lock = &bcap_dev->mutex;
 988
 989         ret = vb2_queue_init(q);
 990         if (ret)
 991                 goto err_free_handler;
 992
 993         mutex_init(&bcap_dev->mutex);
 994         init_completion(&bcap_dev->comp);
 995
 996         /* init video dma queues */
 997         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 998
 999         vfd->lock = &bcap_dev->mutex;
1000
1001         /* register video device */
1002         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1003         if (ret) {
1004                 v4l2_err(&bcap_dev->v4l2_dev,
1005                                 "Unable to register video device\n");
1006                 goto err_free_handler;
1007         }
1008         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1009         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1010                         video_device_node_name(vfd));
1011
1012         /* load up the subdevice */
1013         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1014         if (!i2c_adap) {
1015                 v4l2_err(&bcap_dev->v4l2_dev,
1016                                 "Unable to find i2c adapter\n");
1017                 ret = -ENODEV;
1018                 goto err_unreg_vdev;
1019
1020         }
1021         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1022                                                  i2c_adap,
1023                                                  &config->board_info,
1024                                                  NULL);
1025         if (bcap_dev->sd) {
1026                 int i;
1027
1028                 /* update tvnorms from the sub devices */
1029                 for (i = 0; i < config->num_inputs; i++)
1030                         vfd->tvnorms |= config->inputs[i].std;
1031         } else {
1032                 v4l2_err(&bcap_dev->v4l2_dev,
1033                                 "Unable to register sub device\n");
1034                 ret = -ENODEV;
1035                 goto err_unreg_vdev;
1036         }
1037
1038         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1039
1040         /*
1041          * explicitly set input, otherwise some boards
1042          * may not work at the state as we expected
1043          */
1044         route = &config->routes[0];
1045         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1046                                 route->input, route->output, 0);
1047         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1048                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1049                 goto err_unreg_vdev;
1050         }
1051         bcap_dev->cur_input = 0;
1052         /* if this route has specific config, update ppi control */
1053         if (route->ppi_control)
1054                 config->ppi_control = route->ppi_control;
1055
1056         /* now we can probe the default state */
1057         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1058                 v4l2_std_id std;
1059                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1060                 if (ret) {
1061                         v4l2_err(&bcap_dev->v4l2_dev,
1062                                         "Unable to get std\n");
1063                         goto err_unreg_vdev;
1064                 }
1065                 bcap_dev->std = std;
1066         }
1067         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1068                 struct v4l2_dv_timings dv_timings;
1069                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1070                                 g_dv_timings, &dv_timings);
1071                 if (ret) {
1072                         v4l2_err(&bcap_dev->v4l2_dev,
1073                                         "Unable to get dv timings\n");
1074                         goto err_unreg_vdev;
1075                 }
1076                 bcap_dev->dv_timings = dv_timings;
1077         }
1078         ret = bcap_init_sensor_formats(bcap_dev);
1079         if (ret) {
1080                 v4l2_err(&bcap_dev->v4l2_dev,
1081                                 "Unable to create sensor formats table\n");
1082                 goto err_unreg_vdev;
1083         }
1084         return 0;
1085 err_unreg_vdev:
1086         video_unregister_device(bcap_dev->video_dev);
1087         bcap_dev->video_dev = NULL;
1088 err_free_handler:
1089         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1090 err_unreg_v4l2:
1091         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1092 err_release_vdev:
1093         if (bcap_dev->video_dev)
1094                 video_device_release(bcap_dev->video_dev);
1095 err_cleanup_ctx:
1096         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1097 err_free_ppi:
1098         ppi_delete_instance(bcap_dev->ppi);
1099 err_free_dev:
1100         kfree(bcap_dev);
1101         return ret;
1102 }
1103
1104 static int bcap_remove(struct platform_device *pdev)
1105 {
1106         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1107         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1108                                                 struct bcap_device, v4l2_dev);
1109
1110         bcap_free_sensor_formats(bcap_dev);
1111         video_unregister_device(bcap_dev->video_dev);
1112         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1113         v4l2_device_unregister(v4l2_dev);
1114         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1115         ppi_delete_instance(bcap_dev->ppi);
1116         kfree(bcap_dev);
1117         return 0;
1118 }
1119
1120 static struct platform_driver bcap_driver = {
1121         .driver = {
1122                 .name  = CAPTURE_DRV_NAME,
1123         },
1124         .probe = bcap_probe,
1125         .remove = bcap_remove,
1126 };
1127 module_platform_driver(bcap_driver);
1128
1129 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1130 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1131 MODULE_LICENSE("GPL v2");