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-chip-ident.h>
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-ctrls.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ioctl.h>
  40 #include <media/videobuf2-dma-contig.h>
  41
  42 #include <asm/dma.h>
  43
  44 #include <media/blackfin/bfin_capture.h>
  45 #include <media/blackfin/ppi.h>
  46
  47 #define CAPTURE_DRV_NAME        "bfin_capture"
  48 #define BCAP_MIN_NUM_BUF        2
  49
  50 struct bcap_format {
  51         char *desc;
  52         u32 pixelformat;
  53         enum v4l2_mbus_pixelcode mbus_code;
  54         int bpp; /* bits per pixel */
  55         int dlen; /* data length for ppi in bits */
  56 };
  57
  58 struct bcap_buffer {
  59         struct vb2_buffer vb;
  60         struct list_head list;
  61 };
  62
  63 struct bcap_device {
  64         /* capture device instance */
  65         struct v4l2_device v4l2_dev;
  66         /* v4l2 control handler */
  67         struct v4l2_ctrl_handler ctrl_handler;
  68         /* device node data */
  69         struct video_device *video_dev;
  70         /* sub device instance */
  71         struct v4l2_subdev *sd;
  72         /* capture config */
  73         struct bfin_capture_config *cfg;
  74         /* ppi interface */
  75         struct ppi_if *ppi;
  76         /* current input */
  77         unsigned int cur_input;
  78         /* current selected standard */
  79         v4l2_std_id std;
  80         /* current selected dv_timings */
  81         struct v4l2_dv_timings dv_timings;
  82         /* used to store pixel format */
  83         struct v4l2_pix_format fmt;
  84         /* bits per pixel*/
  85         int bpp;
  86         /* data length for ppi in bits */
  87         int dlen;
  88         /* used to store sensor supported format */
  89         struct bcap_format *sensor_formats;
  90         /* number of sensor formats array */
  91         int num_sensor_formats;
  92         /* pointing to current video buffer */
  93         struct bcap_buffer *cur_frm;
  94         /* buffer queue used in videobuf2 */
  95         struct vb2_queue buffer_queue;
  96         /* allocator-specific contexts for each plane */
  97         struct vb2_alloc_ctx *alloc_ctx;
  98         /* queue of filled frames */
  99         struct list_head dma_queue;
 100         /* used in videobuf2 callback */
 101         spinlock_t lock;
 102         /* used to access capture device */
 103         struct mutex mutex;
 104         /* used to wait ppi to complete one transfer */
 105         struct completion comp;
 106         /* prepare to stop */
 107         bool stop;
 108 };
 109
 110 struct bcap_fh {
 111         struct v4l2_fh fh;
 112         /* indicates whether this file handle is doing IO */
 113         bool io_allowed;
 114 };
 115
 116 static const struct bcap_format bcap_formats[] = {
 117         {
 118                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 119                 .pixelformat = V4L2_PIX_FMT_UYVY,
 120                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
 121                 .bpp         = 16,
 122                 .dlen        = 8,
 123         },
 124         {
 125                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 126                 .pixelformat = V4L2_PIX_FMT_YUYV,
 127                 .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
 128                 .bpp         = 16,
 129                 .dlen        = 8,
 130         },
 131         {
 132                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 133                 .pixelformat = V4L2_PIX_FMT_UYVY,
 134                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_1X16,
 135                 .bpp         = 16,
 136                 .dlen        = 16,
 137         },
 138         {
 139                 .desc        = "RGB 565",
 140                 .pixelformat = V4L2_PIX_FMT_RGB565,
 141                 .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
 142                 .bpp         = 16,
 143                 .dlen        = 8,
 144         },
 145         {
 146                 .desc        = "RGB 444",
 147                 .pixelformat = V4L2_PIX_FMT_RGB444,
 148                 .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
 149                 .bpp         = 16,
 150                 .dlen        = 8,
 151         },
 152
 153 };
 154 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 155
 156 static irqreturn_t bcap_isr(int irq, void *dev_id);
 157
 158 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 159 {
 160         return container_of(vb, struct bcap_buffer, vb);
 161 }
 162
 163 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 164 {
 165         enum v4l2_mbus_pixelcode code;
 166         struct bcap_format *sf;
 167         unsigned int num_formats = 0;
 168         int i, j;
 169
 170         while (!v4l2_subdev_call(bcap_dev->sd, video,
 171                                 enum_mbus_fmt, num_formats, &code))
 172                 num_formats++;
 173         if (!num_formats)
 174                 return -ENXIO;
 175
 176         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 177         if (!sf)
 178                 return -ENOMEM;
 179
 180         for (i = 0; i < num_formats; i++) {
 181                 v4l2_subdev_call(bcap_dev->sd, video,
 182                                 enum_mbus_fmt, i, &code);
 183                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 184                         if (code == bcap_formats[j].mbus_code)
 185                                 break;
 186                 if (j == BCAP_MAX_FMTS) {
 187                         /* we don't allow this sensor working with our bridge */
 188                         kfree(sf);
 189                         return -EINVAL;
 190                 }
 191                 sf[i] = bcap_formats[j];
 192         }
 193         bcap_dev->sensor_formats = sf;
 194         bcap_dev->num_sensor_formats = num_formats;
 195         return 0;
 196 }
 197
 198 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 199 {
 200         bcap_dev->num_sensor_formats = 0;
 201         kfree(bcap_dev->sensor_formats);
 202         bcap_dev->sensor_formats = NULL;
 203 }
 204
 205 static int bcap_open(struct file *file)
 206 {
 207         struct bcap_device *bcap_dev = video_drvdata(file);
 208         struct video_device *vfd = bcap_dev->video_dev;
 209         struct bcap_fh *bcap_fh;
 210
 211         if (!bcap_dev->sd) {
 212                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
 213                 return -ENODEV;
 214         }
 215
 216         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
 217         if (!bcap_fh) {
 218                 v4l2_err(&bcap_dev->v4l2_dev,
 219                          "unable to allocate memory for file handle object\n");
 220                 return -ENOMEM;
 221         }
 222
 223         v4l2_fh_init(&bcap_fh->fh, vfd);
 224
 225         /* store pointer to v4l2_fh in private_data member of file */
 226         file->private_data = &bcap_fh->fh;
 227         v4l2_fh_add(&bcap_fh->fh);
 228         bcap_fh->io_allowed = false;
 229         return 0;
 230 }
 231
 232 static int bcap_release(struct file *file)
 233 {
 234         struct bcap_device *bcap_dev = video_drvdata(file);
 235         struct v4l2_fh *fh = file->private_data;
 236         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 237
 238         /* if this instance is doing IO */
 239         if (bcap_fh->io_allowed)
 240                 vb2_queue_release(&bcap_dev->buffer_queue);
 241
 242         file->private_data = NULL;
 243         v4l2_fh_del(&bcap_fh->fh);
 244         v4l2_fh_exit(&bcap_fh->fh);
 245         kfree(bcap_fh);
 246         return 0;
 247 }
 248
 249 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
 250 {
 251         struct bcap_device *bcap_dev = video_drvdata(file);
 252         int ret;
 253
 254         if (mutex_lock_interruptible(&bcap_dev->mutex))
 255                 return -ERESTARTSYS;
 256         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
 257         mutex_unlock(&bcap_dev->mutex);
 258         return ret;
 259 }
 260
 261 #ifndef CONFIG_MMU
 262 static unsigned long bcap_get_unmapped_area(struct file *file,
 263                                             unsigned long addr,
 264                                             unsigned long len,
 265                                             unsigned long pgoff,
 266                                             unsigned long flags)
 267 {
 268         struct bcap_device *bcap_dev = video_drvdata(file);
 269
 270         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
 271                                      addr,
 272                                      len,
 273                                      pgoff,
 274                                      flags);
 275 }
 276 #endif
 277
 278 static unsigned int bcap_poll(struct file *file, poll_table *wait)
 279 {
 280         struct bcap_device *bcap_dev = video_drvdata(file);
 281         unsigned int res;
 282
 283         mutex_lock(&bcap_dev->mutex);
 284         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
 285         mutex_unlock(&bcap_dev->mutex);
 286         return res;
 287 }
 288
 289 static int bcap_queue_setup(struct vb2_queue *vq,
 290                                 const struct v4l2_format *fmt,
 291                                 unsigned int *nbuffers, unsigned int *nplanes,
 292                                 unsigned int sizes[], void *alloc_ctxs[])
 293 {
 294         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 295
 296         if (*nbuffers < BCAP_MIN_NUM_BUF)
 297                 *nbuffers = BCAP_MIN_NUM_BUF;
 298
 299         *nplanes = 1;
 300         sizes[0] = bcap_dev->fmt.sizeimage;
 301         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 302
 303         return 0;
 304 }
 305
 306 static int bcap_buffer_init(struct vb2_buffer *vb)
 307 {
 308         struct bcap_buffer *buf = to_bcap_vb(vb);
 309
 310         INIT_LIST_HEAD(&buf->list);
 311         return 0;
 312 }
 313
 314 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 315 {
 316         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 317         struct bcap_buffer *buf = to_bcap_vb(vb);
 318         unsigned long size;
 319
 320         size = bcap_dev->fmt.sizeimage;
 321         if (vb2_plane_size(vb, 0) < size) {
 322                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 323                                 vb2_plane_size(vb, 0), size);
 324                 return -EINVAL;
 325         }
 326         vb2_set_plane_payload(&buf->vb, 0, size);
 327
 328         return 0;
 329 }
 330
 331 static void bcap_buffer_queue(struct vb2_buffer *vb)
 332 {
 333         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 334         struct bcap_buffer *buf = to_bcap_vb(vb);
 335         unsigned long flags;
 336
 337         spin_lock_irqsave(&bcap_dev->lock, flags);
 338         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 339         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 340 }
 341
 342 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 343 {
 344         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 345         struct bcap_buffer *buf = to_bcap_vb(vb);
 346         unsigned long flags;
 347
 348         spin_lock_irqsave(&bcap_dev->lock, flags);
 349         list_del_init(&buf->list);
 350         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 351 }
 352
 353 static void bcap_lock(struct vb2_queue *vq)
 354 {
 355         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 356         mutex_lock(&bcap_dev->mutex);
 357 }
 358
 359 static void bcap_unlock(struct vb2_queue *vq)
 360 {
 361         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 362         mutex_unlock(&bcap_dev->mutex);
 363 }
 364
 365 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 366 {
 367         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 368         struct ppi_if *ppi = bcap_dev->ppi;
 369         struct ppi_params params;
 370         int ret;
 371
 372         /* enable streamon on the sub device */
 373         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 374         if (ret && (ret != -ENOIOCTLCMD)) {
 375                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 376                 return ret;
 377         }
 378
 379         /* set ppi params */
 380         params.width = bcap_dev->fmt.width;
 381         params.height = bcap_dev->fmt.height;
 382         params.bpp = bcap_dev->bpp;
 383         params.dlen = bcap_dev->dlen;
 384         params.ppi_control = bcap_dev->cfg->ppi_control;
 385         params.int_mask = bcap_dev->cfg->int_mask;
 386         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 387                         & V4L2_IN_CAP_DV_TIMINGS) {
 388                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 389
 390                 params.hdelay = bt->hsync + bt->hbackporch;
 391                 params.vdelay = bt->vsync + bt->vbackporch;
 392                 params.line = bt->hfrontporch + bt->hsync
 393                                 + bt->hbackporch + bt->width;
 394                 params.frame = bt->vfrontporch + bt->vsync
 395                                 + bt->vbackporch + bt->height;
 396                 if (bt->interlaced)
 397                         params.frame += bt->il_vfrontporch + bt->il_vsync
 398                                         + bt->il_vbackporch;
 399         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 400                         & V4L2_IN_CAP_STD) {
 401                 params.hdelay = 0;
 402                 params.vdelay = 0;
 403                 if (bcap_dev->std & V4L2_STD_525_60) {
 404                         params.line = 858;
 405                         params.frame = 525;
 406                 } else {
 407                         params.line = 864;
 408                         params.frame = 625;
 409                 }
 410         } else {
 411                 params.hdelay = 0;
 412                 params.vdelay = 0;
 413                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 414                 params.frame = params.height;
 415         }
 416         ret = ppi->ops->set_params(ppi, &params);
 417         if (ret < 0) {
 418                 v4l2_err(&bcap_dev->v4l2_dev,
 419                                 "Error in setting ppi params\n");
 420                 return ret;
 421         }
 422
 423         /* attach ppi DMA irq handler */
 424         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 425         if (ret < 0) {
 426                 v4l2_err(&bcap_dev->v4l2_dev,
 427                                 "Error in attaching interrupt handler\n");
 428                 return ret;
 429         }
 430
 431         INIT_COMPLETION(bcap_dev->comp);
 432         bcap_dev->stop = false;
 433         return 0;
 434 }
 435
 436 static int bcap_stop_streaming(struct vb2_queue *vq)
 437 {
 438         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 439         struct ppi_if *ppi = bcap_dev->ppi;
 440         int ret;
 441
 442         if (!vb2_is_streaming(vq))
 443                 return 0;
 444
 445         bcap_dev->stop = true;
 446         wait_for_completion(&bcap_dev->comp);
 447         ppi->ops->stop(ppi);
 448         ppi->ops->detach_irq(ppi);
 449         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 450         if (ret && (ret != -ENOIOCTLCMD))
 451                 v4l2_err(&bcap_dev->v4l2_dev,
 452                                 "stream off failed in subdev\n");
 453
 454         /* release all active buffers */
 455         while (!list_empty(&bcap_dev->dma_queue)) {
 456                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 457                                                 struct bcap_buffer, list);
 458                 list_del(&bcap_dev->cur_frm->list);
 459                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 460         }
 461         return 0;
 462 }
 463
 464 static struct vb2_ops bcap_video_qops = {
 465         .queue_setup            = bcap_queue_setup,
 466         .buf_init               = bcap_buffer_init,
 467         .buf_prepare            = bcap_buffer_prepare,
 468         .buf_cleanup            = bcap_buffer_cleanup,
 469         .buf_queue              = bcap_buffer_queue,
 470         .wait_prepare           = bcap_unlock,
 471         .wait_finish            = bcap_lock,
 472         .start_streaming        = bcap_start_streaming,
 473         .stop_streaming         = bcap_stop_streaming,
 474 };
 475
 476 static int bcap_reqbufs(struct file *file, void *priv,
 477                         struct v4l2_requestbuffers *req_buf)
 478 {
 479         struct bcap_device *bcap_dev = video_drvdata(file);
 480         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 481         struct v4l2_fh *fh = file->private_data;
 482         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 483
 484         if (vb2_is_busy(vq))
 485                 return -EBUSY;
 486
 487         bcap_fh->io_allowed = true;
 488
 489         return vb2_reqbufs(vq, req_buf);
 490 }
 491
 492 static int bcap_querybuf(struct file *file, void *priv,
 493                                 struct v4l2_buffer *buf)
 494 {
 495         struct bcap_device *bcap_dev = video_drvdata(file);
 496
 497         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 498 }
 499
 500 static int bcap_qbuf(struct file *file, void *priv,
 501                         struct v4l2_buffer *buf)
 502 {
 503         struct bcap_device *bcap_dev = video_drvdata(file);
 504         struct v4l2_fh *fh = file->private_data;
 505         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 506
 507         if (!bcap_fh->io_allowed)
 508                 return -EBUSY;
 509
 510         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 511 }
 512
 513 static int bcap_dqbuf(struct file *file, void *priv,
 514                         struct v4l2_buffer *buf)
 515 {
 516         struct bcap_device *bcap_dev = video_drvdata(file);
 517         struct v4l2_fh *fh = file->private_data;
 518         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 519
 520         if (!bcap_fh->io_allowed)
 521                 return -EBUSY;
 522
 523         return vb2_dqbuf(&bcap_dev->buffer_queue,
 524                                 buf, file->f_flags & O_NONBLOCK);
 525 }
 526
 527 static irqreturn_t bcap_isr(int irq, void *dev_id)
 528 {
 529         struct ppi_if *ppi = dev_id;
 530         struct bcap_device *bcap_dev = ppi->priv;
 531         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 532         dma_addr_t addr;
 533
 534         spin_lock(&bcap_dev->lock);
 535
 536         if (!list_empty(&bcap_dev->dma_queue)) {
 537                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 538                 if (ppi->err) {
 539                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 540                         ppi->err = false;
 541                 } else {
 542                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 543                 }
 544                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 545                                 struct bcap_buffer, list);
 546                 list_del(&bcap_dev->cur_frm->list);
 547         } else {
 548                 /* clear error flag, we will get a new frame */
 549                 if (ppi->err)
 550                         ppi->err = false;
 551         }
 552
 553         ppi->ops->stop(ppi);
 554
 555         if (bcap_dev->stop) {
 556                 complete(&bcap_dev->comp);
 557         } else {
 558                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 559                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 560                 ppi->ops->start(ppi);
 561         }
 562
 563         spin_unlock(&bcap_dev->lock);
 564
 565         return IRQ_HANDLED;
 566 }
 567
 568 static int bcap_streamon(struct file *file, void *priv,
 569                                 enum v4l2_buf_type buf_type)
 570 {
 571         struct bcap_device *bcap_dev = video_drvdata(file);
 572         struct bcap_fh *fh = file->private_data;
 573         struct ppi_if *ppi = bcap_dev->ppi;
 574         dma_addr_t addr;
 575         int ret;
 576
 577         if (!fh->io_allowed)
 578                 return -EBUSY;
 579
 580         /* call streamon to start streaming in videobuf */
 581         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 582         if (ret)
 583                 return ret;
 584
 585         /* if dma queue is empty, return error */
 586         if (list_empty(&bcap_dev->dma_queue)) {
 587                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 588                 ret = -EINVAL;
 589                 goto err;
 590         }
 591
 592         /* get the next frame from the dma queue */
 593         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 594                                         struct bcap_buffer, list);
 595         /* remove buffer from the dma queue */
 596         list_del(&bcap_dev->cur_frm->list);
 597         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 598         /* update DMA address */
 599         ppi->ops->update_addr(ppi, (unsigned long)addr);
 600         /* enable ppi */
 601         ppi->ops->start(ppi);
 602
 603         return 0;
 604 err:
 605         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 606         return ret;
 607 }
 608
 609 static int bcap_streamoff(struct file *file, void *priv,
 610                                 enum v4l2_buf_type buf_type)
 611 {
 612         struct bcap_device *bcap_dev = video_drvdata(file);
 613         struct bcap_fh *fh = file->private_data;
 614
 615         if (!fh->io_allowed)
 616                 return -EBUSY;
 617
 618         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 619 }
 620
 621 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 622 {
 623         struct bcap_device *bcap_dev = video_drvdata(file);
 624
 625         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 626 }
 627
 628 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 629 {
 630         struct bcap_device *bcap_dev = video_drvdata(file);
 631
 632         *std = bcap_dev->std;
 633         return 0;
 634 }
 635
 636 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id *std)
 637 {
 638         struct bcap_device *bcap_dev = video_drvdata(file);
 639         int ret;
 640
 641         if (vb2_is_busy(&bcap_dev->buffer_queue))
 642                 return -EBUSY;
 643
 644         ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std);
 645         if (ret < 0)
 646                 return ret;
 647
 648         bcap_dev->std = *std;
 649         return 0;
 650 }
 651
 652 static int bcap_g_dv_timings(struct file *file, void *priv,
 653                                 struct v4l2_dv_timings *timings)
 654 {
 655         struct bcap_device *bcap_dev = video_drvdata(file);
 656         int ret;
 657
 658         ret = v4l2_subdev_call(bcap_dev->sd, video,
 659                                 g_dv_timings, timings);
 660         if (ret < 0)
 661                 return ret;
 662
 663         bcap_dev->dv_timings = *timings;
 664         return 0;
 665 }
 666
 667 static int bcap_s_dv_timings(struct file *file, void *priv,
 668                                 struct v4l2_dv_timings *timings)
 669 {
 670         struct bcap_device *bcap_dev = video_drvdata(file);
 671         int ret;
 672         if (vb2_is_busy(&bcap_dev->buffer_queue))
 673                 return -EBUSY;
 674
 675         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 676         if (ret < 0)
 677                 return ret;
 678
 679         bcap_dev->dv_timings = *timings;
 680         return 0;
 681 }
 682
 683 static int bcap_enum_input(struct file *file, void *priv,
 684                                 struct v4l2_input *input)
 685 {
 686         struct bcap_device *bcap_dev = video_drvdata(file);
 687         struct bfin_capture_config *config = bcap_dev->cfg;
 688         int ret;
 689         u32 status;
 690
 691         if (input->index >= config->num_inputs)
 692                 return -EINVAL;
 693
 694         *input = config->inputs[input->index];
 695         /* get input status */
 696         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 697         if (!ret)
 698                 input->status = status;
 699         return 0;
 700 }
 701
 702 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 703 {
 704         struct bcap_device *bcap_dev = video_drvdata(file);
 705
 706         *index = bcap_dev->cur_input;
 707         return 0;
 708 }
 709
 710 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 711 {
 712         struct bcap_device *bcap_dev = video_drvdata(file);
 713         struct bfin_capture_config *config = bcap_dev->cfg;
 714         struct bcap_route *route;
 715         int ret;
 716
 717         if (vb2_is_busy(&bcap_dev->buffer_queue))
 718                 return -EBUSY;
 719
 720         if (index >= config->num_inputs)
 721                 return -EINVAL;
 722
 723         route = &config->routes[index];
 724         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 725                                 route->input, route->output, 0);
 726         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 727                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 728                 return ret;
 729         }
 730         bcap_dev->cur_input = index;
 731         /* if this route has specific config, update ppi control */
 732         if (route->ppi_control)
 733                 config->ppi_control = route->ppi_control;
 734         return 0;
 735 }
 736
 737 static int bcap_try_format(struct bcap_device *bcap,
 738                                 struct v4l2_pix_format *pixfmt,
 739                                 struct bcap_format *bcap_fmt)
 740 {
 741         struct bcap_format *sf = bcap->sensor_formats;
 742         struct bcap_format *fmt = NULL;
 743         struct v4l2_mbus_framefmt mbus_fmt;
 744         int ret, i;
 745
 746         for (i = 0; i < bcap->num_sensor_formats; i++) {
 747                 fmt = &sf[i];
 748                 if (pixfmt->pixelformat == fmt->pixelformat)
 749                         break;
 750         }
 751         if (i == bcap->num_sensor_formats)
 752                 fmt = &sf[0];
 753
 754         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 755         ret = v4l2_subdev_call(bcap->sd, video,
 756                                 try_mbus_fmt, &mbus_fmt);
 757         if (ret < 0)
 758                 return ret;
 759         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 760         if (bcap_fmt) {
 761                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 762                         fmt = &sf[i];
 763                         if (mbus_fmt.code == fmt->mbus_code)
 764                                 break;
 765                 }
 766                 *bcap_fmt = *fmt;
 767         }
 768         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 769         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 770         return 0;
 771 }
 772
 773 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 774                                         struct v4l2_fmtdesc *fmt)
 775 {
 776         struct bcap_device *bcap_dev = video_drvdata(file);
 777         struct bcap_format *sf = bcap_dev->sensor_formats;
 778
 779         if (fmt->index >= bcap_dev->num_sensor_formats)
 780                 return -EINVAL;
 781
 782         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 783         strlcpy(fmt->description,
 784                 sf[fmt->index].desc,
 785                 sizeof(fmt->description));
 786         fmt->pixelformat = sf[fmt->index].pixelformat;
 787         return 0;
 788 }
 789
 790 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 791                                         struct v4l2_format *fmt)
 792 {
 793         struct bcap_device *bcap_dev = video_drvdata(file);
 794         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 795
 796         return bcap_try_format(bcap_dev, pixfmt, NULL);
 797 }
 798
 799 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 800                                 struct v4l2_format *fmt)
 801 {
 802         struct bcap_device *bcap_dev = video_drvdata(file);
 803
 804         fmt->fmt.pix = bcap_dev->fmt;
 805         return 0;
 806 }
 807
 808 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 809                                 struct v4l2_format *fmt)
 810 {
 811         struct bcap_device *bcap_dev = video_drvdata(file);
 812         struct v4l2_mbus_framefmt mbus_fmt;
 813         struct bcap_format bcap_fmt;
 814         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 815         int ret;
 816
 817         if (vb2_is_busy(&bcap_dev->buffer_queue))
 818                 return -EBUSY;
 819
 820         /* see if format works */
 821         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 822         if (ret < 0)
 823                 return ret;
 824
 825         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 826         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 827         if (ret < 0)
 828                 return ret;
 829         bcap_dev->fmt = *pixfmt;
 830         bcap_dev->bpp = bcap_fmt.bpp;
 831         bcap_dev->dlen = bcap_fmt.dlen;
 832         return 0;
 833 }
 834
 835 static int bcap_querycap(struct file *file, void  *priv,
 836                                 struct v4l2_capability *cap)
 837 {
 838         struct bcap_device *bcap_dev = video_drvdata(file);
 839
 840         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 841         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 842         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 843         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 844         return 0;
 845 }
 846
 847 static int bcap_g_parm(struct file *file, void *fh,
 848                                 struct v4l2_streamparm *a)
 849 {
 850         struct bcap_device *bcap_dev = video_drvdata(file);
 851
 852         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 853                 return -EINVAL;
 854         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 855 }
 856
 857 static int bcap_s_parm(struct file *file, void *fh,
 858                                 struct v4l2_streamparm *a)
 859 {
 860         struct bcap_device *bcap_dev = video_drvdata(file);
 861
 862         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 863                 return -EINVAL;
 864         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 865 }
 866
 867 static int bcap_g_chip_ident(struct file *file, void *priv,
 868                 struct v4l2_dbg_chip_ident *chip)
 869 {
 870         struct bcap_device *bcap_dev = video_drvdata(file);
 871
 872         chip->ident = V4L2_IDENT_NONE;
 873         chip->revision = 0;
 874         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
 875                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 876                 return -EINVAL;
 877
 878         return v4l2_subdev_call(bcap_dev->sd, core,
 879                         g_chip_ident, chip);
 880 }
 881
 882 #ifdef CONFIG_VIDEO_ADV_DEBUG
 883 static int bcap_dbg_g_register(struct file *file, void *priv,
 884                 struct v4l2_dbg_register *reg)
 885 {
 886         struct bcap_device *bcap_dev = video_drvdata(file);
 887
 888         return v4l2_subdev_call(bcap_dev->sd, core,
 889                         g_register, reg);
 890 }
 891
 892 static int bcap_dbg_s_register(struct file *file, void *priv,
 893                 struct v4l2_dbg_register *reg)
 894 {
 895         struct bcap_device *bcap_dev = video_drvdata(file);
 896
 897         return v4l2_subdev_call(bcap_dev->sd, core,
 898                         s_register, reg);
 899 }
 900 #endif
 901
 902 static int bcap_log_status(struct file *file, void *priv)
 903 {
 904         struct bcap_device *bcap_dev = video_drvdata(file);
 905         /* status for sub devices */
 906         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 907         return 0;
 908 }
 909
 910 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 911         .vidioc_querycap         = bcap_querycap,
 912         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 913         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 914         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 915         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 916         .vidioc_enum_input       = bcap_enum_input,
 917         .vidioc_g_input          = bcap_g_input,
 918         .vidioc_s_input          = bcap_s_input,
 919         .vidioc_querystd         = bcap_querystd,
 920         .vidioc_s_std            = bcap_s_std,
 921         .vidioc_g_std            = bcap_g_std,
 922         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 923         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 924         .vidioc_reqbufs          = bcap_reqbufs,
 925         .vidioc_querybuf         = bcap_querybuf,
 926         .vidioc_qbuf             = bcap_qbuf,
 927         .vidioc_dqbuf            = bcap_dqbuf,
 928         .vidioc_streamon         = bcap_streamon,
 929         .vidioc_streamoff        = bcap_streamoff,
 930         .vidioc_g_parm           = bcap_g_parm,
 931         .vidioc_s_parm           = bcap_s_parm,
 932         .vidioc_g_chip_ident     = bcap_g_chip_ident,
 933 #ifdef CONFIG_VIDEO_ADV_DEBUG
 934         .vidioc_g_register       = bcap_dbg_g_register,
 935         .vidioc_s_register       = bcap_dbg_s_register,
 936 #endif
 937         .vidioc_log_status       = bcap_log_status,
 938 };
 939
 940 static struct v4l2_file_operations bcap_fops = {
 941         .owner = THIS_MODULE,
 942         .open = bcap_open,
 943         .release = bcap_release,
 944         .unlocked_ioctl = video_ioctl2,
 945         .mmap = bcap_mmap,
 946 #ifndef CONFIG_MMU
 947         .get_unmapped_area = bcap_get_unmapped_area,
 948 #endif
 949         .poll = bcap_poll
 950 };
 951
 952 static int bcap_probe(struct platform_device *pdev)
 953 {
 954         struct bcap_device *bcap_dev;
 955         struct video_device *vfd;
 956         struct i2c_adapter *i2c_adap;
 957         struct bfin_capture_config *config;
 958         struct vb2_queue *q;
 959         struct bcap_route *route;
 960         int ret;
 961
 962         config = pdev->dev.platform_data;
 963         if (!config) {
 964                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 965                 return -ENODEV;
 966         }
 967
 968         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 969         if (!bcap_dev) {
 970                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 971                 return -ENOMEM;
 972         }
 973
 974         bcap_dev->cfg = config;
 975
 976         bcap_dev->ppi = ppi_create_instance(config->ppi_info);
 977         if (!bcap_dev->ppi) {
 978                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 979                 ret = -ENODEV;
 980                 goto err_free_dev;
 981         }
 982         bcap_dev->ppi->priv = bcap_dev;
 983
 984         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 985         if (IS_ERR(bcap_dev->alloc_ctx)) {
 986                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 987                 goto err_free_ppi;
 988         }
 989
 990         vfd = video_device_alloc();
 991         if (!vfd) {
 992                 ret = -ENOMEM;
 993                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 994                 goto err_cleanup_ctx;
 995         }
 996
 997         /* initialize field of video device */
 998         vfd->release            = video_device_release;
 999         vfd->fops               = &bcap_fops;
1000         vfd->ioctl_ops          = &bcap_ioctl_ops;
1001         vfd->tvnorms            = 0;
1002         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
1003         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1004         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
1005         bcap_dev->video_dev     = vfd;
1006
1007         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
1008         if (ret) {
1009                 v4l2_err(pdev->dev.driver,
1010                                 "Unable to register v4l2 device\n");
1011                 goto err_release_vdev;
1012         }
1013         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
1014
1015         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
1016         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
1017         if (ret) {
1018                 v4l2_err(&bcap_dev->v4l2_dev,
1019                                 "Unable to init control handler\n");
1020                 goto err_unreg_v4l2;
1021         }
1022
1023         spin_lock_init(&bcap_dev->lock);
1024         /* initialize queue */
1025         q = &bcap_dev->buffer_queue;
1026         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1027         q->io_modes = VB2_MMAP;
1028         q->drv_priv = bcap_dev;
1029         q->buf_struct_size = sizeof(struct bcap_buffer);
1030         q->ops = &bcap_video_qops;
1031         q->mem_ops = &vb2_dma_contig_memops;
1032         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1033
1034         vb2_queue_init(q);
1035
1036         mutex_init(&bcap_dev->mutex);
1037         init_completion(&bcap_dev->comp);
1038
1039         /* init video dma queues */
1040         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1041
1042         vfd->lock = &bcap_dev->mutex;
1043
1044         /* register video device */
1045         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1046         if (ret) {
1047                 v4l2_err(&bcap_dev->v4l2_dev,
1048                                 "Unable to register video device\n");
1049                 goto err_free_handler;
1050         }
1051         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1052         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1053                         video_device_node_name(vfd));
1054
1055         /* load up the subdevice */
1056         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1057         if (!i2c_adap) {
1058                 v4l2_err(&bcap_dev->v4l2_dev,
1059                                 "Unable to find i2c adapter\n");
1060                 ret = -ENODEV;
1061                 goto err_unreg_vdev;
1062
1063         }
1064         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1065                                                  i2c_adap,
1066                                                  &config->board_info,
1067                                                  NULL);
1068         if (bcap_dev->sd) {
1069                 int i;
1070                 if (!config->num_inputs) {
1071                         v4l2_err(&bcap_dev->v4l2_dev,
1072                                         "Unable to work without input\n");
1073                         goto err_unreg_vdev;
1074                 }
1075
1076                 /* update tvnorms from the sub devices */
1077                 for (i = 0; i < config->num_inputs; i++)
1078                         vfd->tvnorms |= config->inputs[i].std;
1079         } else {
1080                 v4l2_err(&bcap_dev->v4l2_dev,
1081                                 "Unable to register sub device\n");
1082                 goto err_unreg_vdev;
1083         }
1084
1085         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1086
1087         /*
1088          * explicitly set input, otherwise some boards
1089          * may not work at the state as we expected
1090          */
1091         route = &config->routes[0];
1092         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1093                                 route->input, route->output, 0);
1094         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1095                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1096                 goto err_unreg_vdev;
1097         }
1098         bcap_dev->cur_input = 0;
1099         /* if this route has specific config, update ppi control */
1100         if (route->ppi_control)
1101                 config->ppi_control = route->ppi_control;
1102
1103         /* now we can probe the default state */
1104         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1105                 v4l2_std_id std;
1106                 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1107                 if (ret) {
1108                         v4l2_err(&bcap_dev->v4l2_dev,
1109                                         "Unable to get std\n");
1110                         goto err_unreg_vdev;
1111                 }
1112                 bcap_dev->std = std;
1113         }
1114         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1115                 struct v4l2_dv_timings dv_timings;
1116                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1117                                 g_dv_timings, &dv_timings);
1118                 if (ret) {
1119                         v4l2_err(&bcap_dev->v4l2_dev,
1120                                         "Unable to get dv timings\n");
1121                         goto err_unreg_vdev;
1122                 }
1123                 bcap_dev->dv_timings = dv_timings;
1124         }
1125         ret = bcap_init_sensor_formats(bcap_dev);
1126         if (ret) {
1127                 v4l2_err(&bcap_dev->v4l2_dev,
1128                                 "Unable to create sensor formats table\n");
1129                 goto err_unreg_vdev;
1130         }
1131         return 0;
1132 err_unreg_vdev:
1133         video_unregister_device(bcap_dev->video_dev);
1134         bcap_dev->video_dev = NULL;
1135 err_free_handler:
1136         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1137 err_unreg_v4l2:
1138         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1139 err_release_vdev:
1140         if (bcap_dev->video_dev)
1141                 video_device_release(bcap_dev->video_dev);
1142 err_cleanup_ctx:
1143         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1144 err_free_ppi:
1145         ppi_delete_instance(bcap_dev->ppi);
1146 err_free_dev:
1147         kfree(bcap_dev);
1148         return ret;
1149 }
1150
1151 static int bcap_remove(struct platform_device *pdev)
1152 {
1153         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1154         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1155                                                 struct bcap_device, v4l2_dev);
1156
1157         bcap_free_sensor_formats(bcap_dev);
1158         video_unregister_device(bcap_dev->video_dev);
1159         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1160         v4l2_device_unregister(v4l2_dev);
1161         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1162         ppi_delete_instance(bcap_dev->ppi);
1163         kfree(bcap_dev);
1164         return 0;
1165 }
1166
1167 static struct platform_driver bcap_driver = {
1168         .driver = {
1169                 .name  = CAPTURE_DRV_NAME,
1170                 .owner = THIS_MODULE,
1171         },
1172         .probe = bcap_probe,
1173         .remove = bcap_remove,
1174 };
1175 module_platform_driver(bcap_driver);
1176
1177 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1178 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1179 MODULE_LICENSE("GPL v2");