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         enum v4l2_mbus_pixelcode 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   = V4L2_MBUS_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   = V4L2_MBUS_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   = V4L2_MBUS_FMT_UYVY8_1X16,
 134                 .bpp         = 16,
 135                 .dlen        = 16,
 136         },
 137         {
 138                 .desc        = "RGB 565",
 139                 .pixelformat = V4L2_PIX_FMT_RGB565,
 140                 .mbus_code   = V4L2_MBUS_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   = V4L2_MBUS_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         enum v4l2_mbus_pixelcode 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 void bcap_lock(struct vb2_queue *vq)
 353 {
 354         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 355         mutex_lock(&bcap_dev->mutex);
 356 }
 357
 358 static void bcap_unlock(struct vb2_queue *vq)
 359 {
 360         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 361         mutex_unlock(&bcap_dev->mutex);
 362 }
 363
 364 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 365 {
 366         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 367         struct ppi_if *ppi = bcap_dev->ppi;
 368         struct ppi_params params;
 369         int ret;
 370
 371         /* enable streamon on the sub device */
 372         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 373         if (ret && (ret != -ENOIOCTLCMD)) {
 374                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 375                 return ret;
 376         }
 377
 378         /* set ppi params */
 379         params.width = bcap_dev->fmt.width;
 380         params.height = bcap_dev->fmt.height;
 381         params.bpp = bcap_dev->bpp;
 382         params.dlen = bcap_dev->dlen;
 383         params.ppi_control = bcap_dev->cfg->ppi_control;
 384         params.int_mask = bcap_dev->cfg->int_mask;
 385         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 386                         & V4L2_IN_CAP_DV_TIMINGS) {
 387                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 388
 389                 params.hdelay = bt->hsync + bt->hbackporch;
 390                 params.vdelay = bt->vsync + bt->vbackporch;
 391                 params.line = bt->hfrontporch + bt->hsync
 392                                 + bt->hbackporch + bt->width;
 393                 params.frame = bt->vfrontporch + bt->vsync
 394                                 + bt->vbackporch + bt->height;
 395                 if (bt->interlaced)
 396                         params.frame += bt->il_vfrontporch + bt->il_vsync
 397                                         + bt->il_vbackporch;
 398         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 399                         & V4L2_IN_CAP_STD) {
 400                 params.hdelay = 0;
 401                 params.vdelay = 0;
 402                 if (bcap_dev->std & V4L2_STD_525_60) {
 403                         params.line = 858;
 404                         params.frame = 525;
 405                 } else {
 406                         params.line = 864;
 407                         params.frame = 625;
 408                 }
 409         } else {
 410                 params.hdelay = 0;
 411                 params.vdelay = 0;
 412                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 413                 params.frame = params.height;
 414         }
 415         ret = ppi->ops->set_params(ppi, &params);
 416         if (ret < 0) {
 417                 v4l2_err(&bcap_dev->v4l2_dev,
 418                                 "Error in setting ppi params\n");
 419                 return ret;
 420         }
 421
 422         /* attach ppi DMA irq handler */
 423         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 424         if (ret < 0) {
 425                 v4l2_err(&bcap_dev->v4l2_dev,
 426                                 "Error in attaching interrupt handler\n");
 427                 return ret;
 428         }
 429
 430         INIT_COMPLETION(bcap_dev->comp);
 431         bcap_dev->stop = false;
 432         return 0;
 433 }
 434
 435 static int bcap_stop_streaming(struct vb2_queue *vq)
 436 {
 437         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 438         struct ppi_if *ppi = bcap_dev->ppi;
 439         int ret;
 440
 441         if (!vb2_is_streaming(vq))
 442                 return 0;
 443
 444         bcap_dev->stop = true;
 445         wait_for_completion(&bcap_dev->comp);
 446         ppi->ops->stop(ppi);
 447         ppi->ops->detach_irq(ppi);
 448         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 449         if (ret && (ret != -ENOIOCTLCMD))
 450                 v4l2_err(&bcap_dev->v4l2_dev,
 451                                 "stream off failed in subdev\n");
 452
 453         /* release all active buffers */
 454         while (!list_empty(&bcap_dev->dma_queue)) {
 455                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 456                                                 struct bcap_buffer, list);
 457                 list_del(&bcap_dev->cur_frm->list);
 458                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 459         }
 460         return 0;
 461 }
 462
 463 static struct vb2_ops bcap_video_qops = {
 464         .queue_setup            = bcap_queue_setup,
 465         .buf_init               = bcap_buffer_init,
 466         .buf_prepare            = bcap_buffer_prepare,
 467         .buf_cleanup            = bcap_buffer_cleanup,
 468         .buf_queue              = bcap_buffer_queue,
 469         .wait_prepare           = bcap_unlock,
 470         .wait_finish            = bcap_lock,
 471         .start_streaming        = bcap_start_streaming,
 472         .stop_streaming         = bcap_stop_streaming,
 473 };
 474
 475 static int bcap_reqbufs(struct file *file, void *priv,
 476                         struct v4l2_requestbuffers *req_buf)
 477 {
 478         struct bcap_device *bcap_dev = video_drvdata(file);
 479         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 480         struct v4l2_fh *fh = file->private_data;
 481         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 482
 483         if (vb2_is_busy(vq))
 484                 return -EBUSY;
 485
 486         bcap_fh->io_allowed = true;
 487
 488         return vb2_reqbufs(vq, req_buf);
 489 }
 490
 491 static int bcap_querybuf(struct file *file, void *priv,
 492                                 struct v4l2_buffer *buf)
 493 {
 494         struct bcap_device *bcap_dev = video_drvdata(file);
 495
 496         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 497 }
 498
 499 static int bcap_qbuf(struct file *file, void *priv,
 500                         struct v4l2_buffer *buf)
 501 {
 502         struct bcap_device *bcap_dev = video_drvdata(file);
 503         struct v4l2_fh *fh = file->private_data;
 504         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 505
 506         if (!bcap_fh->io_allowed)
 507                 return -EBUSY;
 508
 509         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 510 }
 511
 512 static int bcap_dqbuf(struct file *file, void *priv,
 513                         struct v4l2_buffer *buf)
 514 {
 515         struct bcap_device *bcap_dev = video_drvdata(file);
 516         struct v4l2_fh *fh = file->private_data;
 517         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 518
 519         if (!bcap_fh->io_allowed)
 520                 return -EBUSY;
 521
 522         return vb2_dqbuf(&bcap_dev->buffer_queue,
 523                                 buf, file->f_flags & O_NONBLOCK);
 524 }
 525
 526 static irqreturn_t bcap_isr(int irq, void *dev_id)
 527 {
 528         struct ppi_if *ppi = dev_id;
 529         struct bcap_device *bcap_dev = ppi->priv;
 530         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 531         dma_addr_t addr;
 532
 533         spin_lock(&bcap_dev->lock);
 534
 535         if (!list_empty(&bcap_dev->dma_queue)) {
 536                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 537                 if (ppi->err) {
 538                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 539                         ppi->err = false;
 540                 } else {
 541                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 542                 }
 543                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 544                                 struct bcap_buffer, list);
 545                 list_del(&bcap_dev->cur_frm->list);
 546         } else {
 547                 /* clear error flag, we will get a new frame */
 548                 if (ppi->err)
 549                         ppi->err = false;
 550         }
 551
 552         ppi->ops->stop(ppi);
 553
 554         if (bcap_dev->stop) {
 555                 complete(&bcap_dev->comp);
 556         } else {
 557                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 558                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 559                 ppi->ops->start(ppi);
 560         }
 561
 562         spin_unlock(&bcap_dev->lock);
 563
 564         return IRQ_HANDLED;
 565 }
 566
 567 static int bcap_streamon(struct file *file, void *priv,
 568                                 enum v4l2_buf_type buf_type)
 569 {
 570         struct bcap_device *bcap_dev = video_drvdata(file);
 571         struct bcap_fh *fh = file->private_data;
 572         struct ppi_if *ppi = bcap_dev->ppi;
 573         dma_addr_t addr;
 574         int ret;
 575
 576         if (!fh->io_allowed)
 577                 return -EBUSY;
 578
 579         /* call streamon to start streaming in videobuf */
 580         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 581         if (ret)
 582                 return ret;
 583
 584         /* if dma queue is empty, return error */
 585         if (list_empty(&bcap_dev->dma_queue)) {
 586                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 587                 ret = -EINVAL;
 588                 goto err;
 589         }
 590
 591         /* get the next frame from the dma queue */
 592         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 593                                         struct bcap_buffer, list);
 594         /* remove buffer from the dma queue */
 595         list_del(&bcap_dev->cur_frm->list);
 596         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 597         /* update DMA address */
 598         ppi->ops->update_addr(ppi, (unsigned long)addr);
 599         /* enable ppi */
 600         ppi->ops->start(ppi);
 601
 602         return 0;
 603 err:
 604         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 605         return ret;
 606 }
 607
 608 static int bcap_streamoff(struct file *file, void *priv,
 609                                 enum v4l2_buf_type buf_type)
 610 {
 611         struct bcap_device *bcap_dev = video_drvdata(file);
 612         struct bcap_fh *fh = file->private_data;
 613
 614         if (!fh->io_allowed)
 615                 return -EBUSY;
 616
 617         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 618 }
 619
 620 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 621 {
 622         struct bcap_device *bcap_dev = video_drvdata(file);
 623
 624         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 625 }
 626
 627 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 628 {
 629         struct bcap_device *bcap_dev = video_drvdata(file);
 630
 631         *std = bcap_dev->std;
 632         return 0;
 633 }
 634
 635 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 636 {
 637         struct bcap_device *bcap_dev = video_drvdata(file);
 638         int ret;
 639
 640         if (vb2_is_busy(&bcap_dev->buffer_queue))
 641                 return -EBUSY;
 642
 643         ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, std);
 644         if (ret < 0)
 645                 return ret;
 646
 647         bcap_dev->std = std;
 648         return 0;
 649 }
 650
 651 static int bcap_enum_dv_timings(struct file *file, void *priv,
 652                                 struct v4l2_enum_dv_timings *timings)
 653 {
 654         struct bcap_device *bcap_dev = video_drvdata(file);
 655
 656         return v4l2_subdev_call(bcap_dev->sd, video,
 657                         enum_dv_timings, timings);
 658 }
 659
 660 static int bcap_query_dv_timings(struct file *file, void *priv,
 661                                 struct v4l2_dv_timings *timings)
 662 {
 663         struct bcap_device *bcap_dev = video_drvdata(file);
 664
 665         return v4l2_subdev_call(bcap_dev->sd, video,
 666                                 query_dv_timings, timings);
 667 }
 668
 669 static int bcap_g_dv_timings(struct file *file, void *priv,
 670                                 struct v4l2_dv_timings *timings)
 671 {
 672         struct bcap_device *bcap_dev = video_drvdata(file);
 673
 674         *timings = bcap_dev->dv_timings;
 675         return 0;
 676 }
 677
 678 static int bcap_s_dv_timings(struct file *file, void *priv,
 679                                 struct v4l2_dv_timings *timings)
 680 {
 681         struct bcap_device *bcap_dev = video_drvdata(file);
 682         int ret;
 683         if (vb2_is_busy(&bcap_dev->buffer_queue))
 684                 return -EBUSY;
 685
 686         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 687         if (ret < 0)
 688                 return ret;
 689
 690         bcap_dev->dv_timings = *timings;
 691         return 0;
 692 }
 693
 694 static int bcap_enum_input(struct file *file, void *priv,
 695                                 struct v4l2_input *input)
 696 {
 697         struct bcap_device *bcap_dev = video_drvdata(file);
 698         struct bfin_capture_config *config = bcap_dev->cfg;
 699         int ret;
 700         u32 status;
 701
 702         if (input->index >= config->num_inputs)
 703                 return -EINVAL;
 704
 705         *input = config->inputs[input->index];
 706         /* get input status */
 707         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 708         if (!ret)
 709                 input->status = status;
 710         return 0;
 711 }
 712
 713 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 714 {
 715         struct bcap_device *bcap_dev = video_drvdata(file);
 716
 717         *index = bcap_dev->cur_input;
 718         return 0;
 719 }
 720
 721 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 722 {
 723         struct bcap_device *bcap_dev = video_drvdata(file);
 724         struct bfin_capture_config *config = bcap_dev->cfg;
 725         struct bcap_route *route;
 726         int ret;
 727
 728         if (vb2_is_busy(&bcap_dev->buffer_queue))
 729                 return -EBUSY;
 730
 731         if (index >= config->num_inputs)
 732                 return -EINVAL;
 733
 734         route = &config->routes[index];
 735         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 736                                 route->input, route->output, 0);
 737         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 738                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 739                 return ret;
 740         }
 741         bcap_dev->cur_input = index;
 742         /* if this route has specific config, update ppi control */
 743         if (route->ppi_control)
 744                 config->ppi_control = route->ppi_control;
 745         return 0;
 746 }
 747
 748 static int bcap_try_format(struct bcap_device *bcap,
 749                                 struct v4l2_pix_format *pixfmt,
 750                                 struct bcap_format *bcap_fmt)
 751 {
 752         struct bcap_format *sf = bcap->sensor_formats;
 753         struct bcap_format *fmt = NULL;
 754         struct v4l2_mbus_framefmt mbus_fmt;
 755         int ret, i;
 756
 757         for (i = 0; i < bcap->num_sensor_formats; i++) {
 758                 fmt = &sf[i];
 759                 if (pixfmt->pixelformat == fmt->pixelformat)
 760                         break;
 761         }
 762         if (i == bcap->num_sensor_formats)
 763                 fmt = &sf[0];
 764
 765         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 766         ret = v4l2_subdev_call(bcap->sd, video,
 767                                 try_mbus_fmt, &mbus_fmt);
 768         if (ret < 0)
 769                 return ret;
 770         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 771         if (bcap_fmt) {
 772                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 773                         fmt = &sf[i];
 774                         if (mbus_fmt.code == fmt->mbus_code)
 775                                 break;
 776                 }
 777                 *bcap_fmt = *fmt;
 778         }
 779         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 780         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 781         return 0;
 782 }
 783
 784 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 785                                         struct v4l2_fmtdesc *fmt)
 786 {
 787         struct bcap_device *bcap_dev = video_drvdata(file);
 788         struct bcap_format *sf = bcap_dev->sensor_formats;
 789
 790         if (fmt->index >= bcap_dev->num_sensor_formats)
 791                 return -EINVAL;
 792
 793         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 794         strlcpy(fmt->description,
 795                 sf[fmt->index].desc,
 796                 sizeof(fmt->description));
 797         fmt->pixelformat = sf[fmt->index].pixelformat;
 798         return 0;
 799 }
 800
 801 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 802                                         struct v4l2_format *fmt)
 803 {
 804         struct bcap_device *bcap_dev = video_drvdata(file);
 805         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 806
 807         return bcap_try_format(bcap_dev, pixfmt, NULL);
 808 }
 809
 810 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 811                                 struct v4l2_format *fmt)
 812 {
 813         struct bcap_device *bcap_dev = video_drvdata(file);
 814
 815         fmt->fmt.pix = bcap_dev->fmt;
 816         return 0;
 817 }
 818
 819 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 820                                 struct v4l2_format *fmt)
 821 {
 822         struct bcap_device *bcap_dev = video_drvdata(file);
 823         struct v4l2_mbus_framefmt mbus_fmt;
 824         struct bcap_format bcap_fmt;
 825         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 826         int ret;
 827
 828         if (vb2_is_busy(&bcap_dev->buffer_queue))
 829                 return -EBUSY;
 830
 831         /* see if format works */
 832         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 833         if (ret < 0)
 834                 return ret;
 835
 836         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 837         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 838         if (ret < 0)
 839                 return ret;
 840         bcap_dev->fmt = *pixfmt;
 841         bcap_dev->bpp = bcap_fmt.bpp;
 842         bcap_dev->dlen = bcap_fmt.dlen;
 843         return 0;
 844 }
 845
 846 static int bcap_querycap(struct file *file, void  *priv,
 847                                 struct v4l2_capability *cap)
 848 {
 849         struct bcap_device *bcap_dev = video_drvdata(file);
 850
 851         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 852         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 853         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 854         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 855         return 0;
 856 }
 857
 858 static int bcap_g_parm(struct file *file, void *fh,
 859                                 struct v4l2_streamparm *a)
 860 {
 861         struct bcap_device *bcap_dev = video_drvdata(file);
 862
 863         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 864                 return -EINVAL;
 865         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 866 }
 867
 868 static int bcap_s_parm(struct file *file, void *fh,
 869                                 struct v4l2_streamparm *a)
 870 {
 871         struct bcap_device *bcap_dev = video_drvdata(file);
 872
 873         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 874                 return -EINVAL;
 875         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 876 }
 877
 878 static int bcap_log_status(struct file *file, void *priv)
 879 {
 880         struct bcap_device *bcap_dev = video_drvdata(file);
 881         /* status for sub devices */
 882         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 883         return 0;
 884 }
 885
 886 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 887         .vidioc_querycap         = bcap_querycap,
 888         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 889         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 890         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 891         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 892         .vidioc_enum_input       = bcap_enum_input,
 893         .vidioc_g_input          = bcap_g_input,
 894         .vidioc_s_input          = bcap_s_input,
 895         .vidioc_querystd         = bcap_querystd,
 896         .vidioc_s_std            = bcap_s_std,
 897         .vidioc_g_std            = bcap_g_std,
 898         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 899         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 900         .vidioc_query_dv_timings = bcap_query_dv_timings,
 901         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 902         .vidioc_reqbufs          = bcap_reqbufs,
 903         .vidioc_querybuf         = bcap_querybuf,
 904         .vidioc_qbuf             = bcap_qbuf,
 905         .vidioc_dqbuf            = bcap_dqbuf,
 906         .vidioc_streamon         = bcap_streamon,
 907         .vidioc_streamoff        = bcap_streamoff,
 908         .vidioc_g_parm           = bcap_g_parm,
 909         .vidioc_s_parm           = bcap_s_parm,
 910         .vidioc_log_status       = bcap_log_status,
 911 };
 912
 913 static struct v4l2_file_operations bcap_fops = {
 914         .owner = THIS_MODULE,
 915         .open = bcap_open,
 916         .release = bcap_release,
 917         .unlocked_ioctl = video_ioctl2,
 918         .mmap = bcap_mmap,
 919 #ifndef CONFIG_MMU
 920         .get_unmapped_area = bcap_get_unmapped_area,
 921 #endif
 922         .poll = bcap_poll
 923 };
 924
 925 static int bcap_probe(struct platform_device *pdev)
 926 {
 927         struct bcap_device *bcap_dev;
 928         struct video_device *vfd;
 929         struct i2c_adapter *i2c_adap;
 930         struct bfin_capture_config *config;
 931         struct vb2_queue *q;
 932         struct bcap_route *route;
 933         int ret;
 934
 935         config = pdev->dev.platform_data;
 936         if (!config || !config->num_inputs) {
 937                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 938                 return -ENODEV;
 939         }
 940
 941         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 942         if (!bcap_dev) {
 943                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 944                 return -ENOMEM;
 945         }
 946
 947         bcap_dev->cfg = config;
 948
 949         bcap_dev->ppi = ppi_create_instance(config->ppi_info);
 950         if (!bcap_dev->ppi) {
 951                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 952                 ret = -ENODEV;
 953                 goto err_free_dev;
 954         }
 955         bcap_dev->ppi->priv = bcap_dev;
 956
 957         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 958         if (IS_ERR(bcap_dev->alloc_ctx)) {
 959                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 960                 goto err_free_ppi;
 961         }
 962
 963         vfd = video_device_alloc();
 964         if (!vfd) {
 965                 ret = -ENOMEM;
 966                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 967                 goto err_cleanup_ctx;
 968         }
 969
 970         /* initialize field of video device */
 971         vfd->release            = video_device_release;
 972         vfd->fops               = &bcap_fops;
 973         vfd->ioctl_ops          = &bcap_ioctl_ops;
 974         vfd->tvnorms            = 0;
 975         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 976         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
 977         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 978         bcap_dev->video_dev     = vfd;
 979
 980         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 981         if (ret) {
 982                 v4l2_err(pdev->dev.driver,
 983                                 "Unable to register v4l2 device\n");
 984                 goto err_release_vdev;
 985         }
 986         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 987
 988         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 989         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 990         if (ret) {
 991                 v4l2_err(&bcap_dev->v4l2_dev,
 992                                 "Unable to init control handler\n");
 993                 goto err_unreg_v4l2;
 994         }
 995
 996         spin_lock_init(&bcap_dev->lock);
 997         /* initialize queue */
 998         q = &bcap_dev->buffer_queue;
 999         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1000         q->io_modes = VB2_MMAP;
1001         q->drv_priv = bcap_dev;
1002         q->buf_struct_size = sizeof(struct bcap_buffer);
1003         q->ops = &bcap_video_qops;
1004         q->mem_ops = &vb2_dma_contig_memops;
1005         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1006
1007         ret = vb2_queue_init(q);
1008         if (ret)
1009                 goto err_free_handler;
1010
1011         mutex_init(&bcap_dev->mutex);
1012         init_completion(&bcap_dev->comp);
1013
1014         /* init video dma queues */
1015         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1016
1017         vfd->lock = &bcap_dev->mutex;
1018
1019         /* register video device */
1020         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1021         if (ret) {
1022                 v4l2_err(&bcap_dev->v4l2_dev,
1023                                 "Unable to register video device\n");
1024                 goto err_free_handler;
1025         }
1026         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1027         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1028                         video_device_node_name(vfd));
1029
1030         /* load up the subdevice */
1031         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1032         if (!i2c_adap) {
1033                 v4l2_err(&bcap_dev->v4l2_dev,
1034                                 "Unable to find i2c adapter\n");
1035                 ret = -ENODEV;
1036                 goto err_unreg_vdev;
1037
1038         }
1039         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1040                                                  i2c_adap,
1041                                                  &config->board_info,
1042                                                  NULL);
1043         if (bcap_dev->sd) {
1044                 int i;
1045
1046                 /* update tvnorms from the sub devices */
1047                 for (i = 0; i < config->num_inputs; i++)
1048                         vfd->tvnorms |= config->inputs[i].std;
1049         } else {
1050                 v4l2_err(&bcap_dev->v4l2_dev,
1051                                 "Unable to register sub device\n");
1052                 ret = -ENODEV;
1053                 goto err_unreg_vdev;
1054         }
1055
1056         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1057
1058         /*
1059          * explicitly set input, otherwise some boards
1060          * may not work at the state as we expected
1061          */
1062         route = &config->routes[0];
1063         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1064                                 route->input, route->output, 0);
1065         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1066                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1067                 goto err_unreg_vdev;
1068         }
1069         bcap_dev->cur_input = 0;
1070         /* if this route has specific config, update ppi control */
1071         if (route->ppi_control)
1072                 config->ppi_control = route->ppi_control;
1073
1074         /* now we can probe the default state */
1075         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1076                 v4l2_std_id std;
1077                 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1078                 if (ret) {
1079                         v4l2_err(&bcap_dev->v4l2_dev,
1080                                         "Unable to get std\n");
1081                         goto err_unreg_vdev;
1082                 }
1083                 bcap_dev->std = std;
1084         }
1085         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1086                 struct v4l2_dv_timings dv_timings;
1087                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1088                                 g_dv_timings, &dv_timings);
1089                 if (ret) {
1090                         v4l2_err(&bcap_dev->v4l2_dev,
1091                                         "Unable to get dv timings\n");
1092                         goto err_unreg_vdev;
1093                 }
1094                 bcap_dev->dv_timings = dv_timings;
1095         }
1096         ret = bcap_init_sensor_formats(bcap_dev);
1097         if (ret) {
1098                 v4l2_err(&bcap_dev->v4l2_dev,
1099                                 "Unable to create sensor formats table\n");
1100                 goto err_unreg_vdev;
1101         }
1102         return 0;
1103 err_unreg_vdev:
1104         video_unregister_device(bcap_dev->video_dev);
1105         bcap_dev->video_dev = NULL;
1106 err_free_handler:
1107         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1108 err_unreg_v4l2:
1109         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1110 err_release_vdev:
1111         if (bcap_dev->video_dev)
1112                 video_device_release(bcap_dev->video_dev);
1113 err_cleanup_ctx:
1114         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1115 err_free_ppi:
1116         ppi_delete_instance(bcap_dev->ppi);
1117 err_free_dev:
1118         kfree(bcap_dev);
1119         return ret;
1120 }
1121
1122 static int bcap_remove(struct platform_device *pdev)
1123 {
1124         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1125         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1126                                                 struct bcap_device, v4l2_dev);
1127
1128         bcap_free_sensor_formats(bcap_dev);
1129         video_unregister_device(bcap_dev->video_dev);
1130         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1131         v4l2_device_unregister(v4l2_dev);
1132         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1133         ppi_delete_instance(bcap_dev->ppi);
1134         kfree(bcap_dev);
1135         return 0;
1136 }
1137
1138 static struct platform_driver bcap_driver = {
1139         .driver = {
1140                 .name  = CAPTURE_DRV_NAME,
1141                 .owner = THIS_MODULE,
1142         },
1143         .probe = bcap_probe,
1144         .remove = bcap_remove,
1145 };
1146 module_platform_driver(bcap_driver);
1147
1148 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1149 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1150 MODULE_LICENSE("GPL v2");