drivers/media/video/davinci/vpfe_capture.c

   1 /*
   2  * Copyright (C) 2008-2009 Texas Instruments Inc
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17  *
  18  * Driver name : VPFE Capture driver
  19  *    VPFE Capture driver allows applications to capture and stream video
  20  *    frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
  21  *    TVP5146 or  Raw Bayer RGB image data from an image sensor
  22  *    such as Microns' MT9T001, MT9T031 etc.
  23  *
  24  *    These SoCs have, in common, a Video Processing Subsystem (VPSS) that
  25  *    consists of a Video Processing Front End (VPFE) for capturing
  26  *    video/raw image data and Video Processing Back End (VPBE) for displaying
  27  *    YUV data through an in-built analog encoder or Digital LCD port. This
  28  *    driver is for capture through VPFE. A typical EVM using these SoCs have
  29  *    following high level configuration.
  30  *
  31  *
  32  *    decoder(TVP5146/          YUV/
  33  *           MT9T001)   -->  Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
  34  *                              data input              |      |
  35  *                                                      V      |
  36  *                                                    SDRAM    |
  37  *                                                             V
  38  *                                                         Image Processor
  39  *                                                             |
  40  *                                                             V
  41  *                                                           SDRAM
  42  *    The data flow happens from a decoder connected to the VPFE over a
  43  *    YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
  44  *    and to the input of VPFE through an optional MUX (if more inputs are
  45  *    to be interfaced on the EVM). The input data is first passed through
  46  *    CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
  47  *    does very little or no processing on YUV data and does pre-process Raw
  48  *    Bayer RGB data through modules such as Defect Pixel Correction (DFC)
  49  *    Color Space Conversion (CSC), data gain/offset etc. After this, data
  50  *    can be written to SDRAM or can be connected to the image processing
  51  *    block such as IPIPE (on DM355 only).
  52  *
  53  *    Features supported
  54  *              - MMAP IO
  55  *              - Capture using TVP5146 over BT.656
  56  *              - support for interfacing decoders using sub device model
  57  *              - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
  58  *                data capture to SDRAM.
  59  *    TODO list
  60  *              - Support multiple REQBUF after open
  61  *              - Support for de-allocating buffers through REQBUF
  62  *              - Support for Raw Bayer RGB capture
  63  *              - Support for chaining Image Processor
  64  *              - Support for static allocation of buffers
  65  *              - Support for USERPTR IO
  66  *              - Support for STREAMON before QBUF
  67  *              - Support for control ioctls
  68  */
  69 #include <linux/module.h>
  70 #include <linux/init.h>
  71 #include <linux/platform_device.h>
  72 #include <linux/interrupt.h>
  73 #include <linux/version.h>
  74 #include <media/v4l2-common.h>
  75 #include <linux/io.h>
  76 #include <media/davinci/vpfe_capture.h>
  77 #include "ccdc_hw_device.h"
  78
  79 static int debug;
  80 static u32 numbuffers = 3;
  81 static u32 bufsize = (720 * 576 * 2);
  82
  83 module_param(numbuffers, uint, S_IRUGO);
  84 module_param(bufsize, uint, S_IRUGO);
  85 module_param(debug, int, 0644);
  86
  87 MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
  88 MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
  89 MODULE_PARM_DESC(debug, "Debug level 0-1");
  90
  91 MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
  92 MODULE_LICENSE("GPL");
  93 MODULE_AUTHOR("Texas Instruments");
  94
  95 /* standard information */
  96 struct vpfe_standard {
  97         v4l2_std_id std_id;
  98         unsigned int width;
  99         unsigned int height;
 100         struct v4l2_fract pixelaspect;
 101         /* 0 - progressive, 1 - interlaced */
 102         int frame_format;
 103 };
 104
 105 /* ccdc configuration */
 106 struct ccdc_config {
 107         /* This make sure vpfe is probed and ready to go */
 108         int vpfe_probed;
 109         /* name of ccdc device */
 110         char name[32];
 111         /* for storing mem maps for CCDC */
 112         int ccdc_addr_size;
 113         void *__iomem ccdc_addr;
 114 };
 115
 116 /* data structures */
 117 static struct vpfe_config_params config_params = {
 118         .min_numbuffers = 3,
 119         .numbuffers = 3,
 120         .min_bufsize = 720 * 480 * 2,
 121         .device_bufsize = 720 * 576 * 2,
 122 };
 123
 124 /* ccdc device registered */
 125 static struct ccdc_hw_device *ccdc_dev;
 126 /* lock for accessing ccdc information */
 127 static DEFINE_MUTEX(ccdc_lock);
 128 /* ccdc configuration */
 129 static struct ccdc_config *ccdc_cfg;
 130
 131 const struct vpfe_standard vpfe_standards[] = {
 132         {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
 133         {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
 134 };
 135
 136 /* Used when raw Bayer image from ccdc is directly captured to SDRAM */
 137 static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
 138         {
 139                 .fmtdesc = {
 140                         .index = 0,
 141                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 142                         .description = "Bayer GrRBGb 8bit A-Law compr.",
 143                         .pixelformat = V4L2_PIX_FMT_SBGGR8,
 144                 },
 145                 .bpp = 1,
 146         },
 147         {
 148                 .fmtdesc = {
 149                         .index = 1,
 150                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 151                         .description = "Bayer GrRBGb - 16bit",
 152                         .pixelformat = V4L2_PIX_FMT_SBGGR16,
 153                 },
 154                 .bpp = 2,
 155         },
 156         {
 157                 .fmtdesc = {
 158                         .index = 2,
 159                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 160                         .description = "Bayer GrRBGb 8bit DPCM compr.",
 161                         .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
 162                 },
 163                 .bpp = 1,
 164         },
 165         {
 166                 .fmtdesc = {
 167                         .index = 3,
 168                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 169                         .description = "YCbCr 4:2:2 Interleaved UYVY",
 170                         .pixelformat = V4L2_PIX_FMT_UYVY,
 171                 },
 172                 .bpp = 2,
 173         },
 174         {
 175                 .fmtdesc = {
 176                         .index = 4,
 177                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 178                         .description = "YCbCr 4:2:2 Interleaved YUYV",
 179                         .pixelformat = V4L2_PIX_FMT_YUYV,
 180                 },
 181                 .bpp = 2,
 182         },
 183         {
 184                 .fmtdesc = {
 185                         .index = 5,
 186                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 187                         .description = "Y/CbCr 4:2:0 - Semi planar",
 188                         .pixelformat = V4L2_PIX_FMT_NV12,
 189                 },
 190                 .bpp = 1,
 191         },
 192 };
 193
 194 /*
 195  * vpfe_lookup_pix_format()
 196  * lookup an entry in the vpfe pix format table based on pix_format
 197  */
 198 static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
 199 {
 200         int i;
 201
 202         for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
 203                 if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
 204                         return &vpfe_pix_fmts[i];
 205         }
 206         return NULL;
 207 }
 208
 209 /*
 210  * vpfe_register_ccdc_device. CCDC module calls this to
 211  * register with vpfe capture
 212  */
 213 int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
 214 {
 215         int ret = 0;
 216         printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
 217
 218         BUG_ON(!dev->hw_ops.open);
 219         BUG_ON(!dev->hw_ops.enable);
 220         BUG_ON(!dev->hw_ops.set_hw_if_params);
 221         BUG_ON(!dev->hw_ops.configure);
 222         BUG_ON(!dev->hw_ops.set_buftype);
 223         BUG_ON(!dev->hw_ops.get_buftype);
 224         BUG_ON(!dev->hw_ops.enum_pix);
 225         BUG_ON(!dev->hw_ops.set_frame_format);
 226         BUG_ON(!dev->hw_ops.get_frame_format);
 227         BUG_ON(!dev->hw_ops.get_pixel_format);
 228         BUG_ON(!dev->hw_ops.set_pixel_format);
 229         BUG_ON(!dev->hw_ops.set_params);
 230         BUG_ON(!dev->hw_ops.set_image_window);
 231         BUG_ON(!dev->hw_ops.get_image_window);
 232         BUG_ON(!dev->hw_ops.get_line_length);
 233         BUG_ON(!dev->hw_ops.setfbaddr);
 234         BUG_ON(!dev->hw_ops.getfid);
 235
 236         mutex_lock(&ccdc_lock);
 237         if (NULL == ccdc_cfg) {
 238                 /*
 239                  * TODO. Will this ever happen? if so, we need to fix it.
 240                  * Proabably we need to add the request to a linked list and
 241                  * walk through it during vpfe probe
 242                  */
 243                 printk(KERN_ERR "vpfe capture not initialized\n");
 244                 ret = -1;
 245                 goto unlock;
 246         }
 247
 248         if (strcmp(dev->name, ccdc_cfg->name)) {
 249                 /* ignore this ccdc */
 250                 ret = -1;
 251                 goto unlock;
 252         }
 253
 254         if (ccdc_dev) {
 255                 printk(KERN_ERR "ccdc already registered\n");
 256                 ret = -1;
 257                 goto unlock;
 258         }
 259
 260         ccdc_dev = dev;
 261         dev->hw_ops.set_ccdc_base(ccdc_cfg->ccdc_addr,
 262                                   ccdc_cfg->ccdc_addr_size);
 263 unlock:
 264         mutex_unlock(&ccdc_lock);
 265         return ret;
 266 }
 267 EXPORT_SYMBOL(vpfe_register_ccdc_device);
 268
 269 /*
 270  * vpfe_unregister_ccdc_device. CCDC module calls this to
 271  * unregister with vpfe capture
 272  */
 273 void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
 274 {
 275         if (NULL == dev) {
 276                 printk(KERN_ERR "invalid ccdc device ptr\n");
 277                 return;
 278         }
 279
 280         printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
 281                 dev->name);
 282
 283         if (strcmp(dev->name, ccdc_cfg->name)) {
 284                 /* ignore this ccdc */
 285                 return;
 286         }
 287
 288         mutex_lock(&ccdc_lock);
 289         ccdc_dev = NULL;
 290         mutex_unlock(&ccdc_lock);
 291         return;
 292 }
 293 EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
 294
 295 /*
 296  * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
 297  */
 298 static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
 299                                  struct v4l2_format *f)
 300 {
 301         struct v4l2_rect image_win;
 302         enum ccdc_buftype buf_type;
 303         enum ccdc_frmfmt frm_fmt;
 304
 305         memset(f, 0, sizeof(*f));
 306         f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 307         ccdc_dev->hw_ops.get_image_window(&image_win);
 308         f->fmt.pix.width = image_win.width;
 309         f->fmt.pix.height = image_win.height;
 310         f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
 311         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 312                                 f->fmt.pix.height;
 313         buf_type = ccdc_dev->hw_ops.get_buftype();
 314         f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
 315         frm_fmt = ccdc_dev->hw_ops.get_frame_format();
 316         if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
 317                 f->fmt.pix.field = V4L2_FIELD_NONE;
 318         else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
 319                 if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
 320                         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 321                 else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
 322                         f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
 323                 else {
 324                         v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
 325                         return -EINVAL;
 326                 }
 327         } else {
 328                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
 329                 return -EINVAL;
 330         }
 331         return 0;
 332 }
 333
 334 /*
 335  * vpfe_config_ccdc_image_format()
 336  * For a pix format, configure ccdc to setup the capture
 337  */
 338 static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
 339 {
 340         enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
 341         int ret = 0;
 342
 343         if (ccdc_dev->hw_ops.set_pixel_format(
 344                         vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
 345                 v4l2_err(&vpfe_dev->v4l2_dev,
 346                         "couldn't set pix format in ccdc\n");
 347                 return -EINVAL;
 348         }
 349         /* configure the image window */
 350         ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
 351
 352         switch (vpfe_dev->fmt.fmt.pix.field) {
 353         case V4L2_FIELD_INTERLACED:
 354                 /* do nothing, since it is default */
 355                 ret = ccdc_dev->hw_ops.set_buftype(
 356                                 CCDC_BUFTYPE_FLD_INTERLEAVED);
 357                 break;
 358         case V4L2_FIELD_NONE:
 359                 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
 360                 /* buffer type only applicable for interlaced scan */
 361                 break;
 362         case V4L2_FIELD_SEQ_TB:
 363                 ret = ccdc_dev->hw_ops.set_buftype(
 364                                 CCDC_BUFTYPE_FLD_SEPARATED);
 365                 break;
 366         default:
 367                 return -EINVAL;
 368         }
 369
 370         /* set the frame format */
 371         if (!ret)
 372                 ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
 373         return ret;
 374 }
 375 /*
 376  * vpfe_config_image_format()
 377  * For a given standard, this functions sets up the default
 378  * pix format & crop values in the vpfe device and ccdc.  It first
 379  * starts with defaults based values from the standard table.
 380  * It then checks if sub device support g_fmt and then override the
 381  * values based on that.Sets crop values to match with scan resolution
 382  * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
 383  * values in ccdc
 384  */
 385 static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
 386                                     const v4l2_std_id *std_id)
 387 {
 388         struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
 389         int i, ret = 0;
 390
 391         for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
 392                 if (vpfe_standards[i].std_id & *std_id) {
 393                         vpfe_dev->std_info.active_pixels =
 394                                         vpfe_standards[i].width;
 395                         vpfe_dev->std_info.active_lines =
 396                                         vpfe_standards[i].height;
 397                         vpfe_dev->std_info.frame_format =
 398                                         vpfe_standards[i].frame_format;
 399                         vpfe_dev->std_index = i;
 400                         break;
 401                 }
 402         }
 403
 404         if (i ==  ARRAY_SIZE(vpfe_standards)) {
 405                 v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
 406                 return -EINVAL;
 407         }
 408
 409         vpfe_dev->crop.top = 0;
 410         vpfe_dev->crop.left = 0;
 411         vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
 412         vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
 413         vpfe_dev->fmt.fmt.pix.width = vpfe_dev->crop.width;
 414         vpfe_dev->fmt.fmt.pix.height = vpfe_dev->crop.height;
 415
 416         /* first field and frame format based on standard frame format */
 417         if (vpfe_dev->std_info.frame_format) {
 418                 vpfe_dev->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
 419                 /* assume V4L2_PIX_FMT_UYVY as default */
 420                 vpfe_dev->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
 421         } else {
 422                 vpfe_dev->fmt.fmt.pix.field = V4L2_FIELD_NONE;
 423                 /* assume V4L2_PIX_FMT_SBGGR8 */
 424                 vpfe_dev->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 425         }
 426
 427         /* if sub device supports g_fmt, override the defaults */
 428         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 429                         sdinfo->grp_id, video, g_fmt, &vpfe_dev->fmt);
 430
 431         if (ret && ret != -ENOIOCTLCMD) {
 432                 v4l2_err(&vpfe_dev->v4l2_dev,
 433                         "error in getting g_fmt from sub device\n");
 434                 return ret;
 435         }
 436
 437         /* Sets the values in CCDC */
 438         ret = vpfe_config_ccdc_image_format(vpfe_dev);
 439         if (ret)
 440                 return ret;
 441
 442         /* Update the values of sizeimage and bytesperline */
 443         if (!ret) {
 444                 vpfe_dev->fmt.fmt.pix.bytesperline =
 445                         ccdc_dev->hw_ops.get_line_length();
 446                 vpfe_dev->fmt.fmt.pix.sizeimage =
 447                         vpfe_dev->fmt.fmt.pix.bytesperline *
 448                         vpfe_dev->fmt.fmt.pix.height;
 449         }
 450         return ret;
 451 }
 452
 453 static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
 454 {
 455         int ret = 0;
 456
 457         /* set first input of current subdevice as the current input */
 458         vpfe_dev->current_input = 0;
 459
 460         /* set default standard */
 461         vpfe_dev->std_index = 0;
 462
 463         /* Configure the default format information */
 464         ret = vpfe_config_image_format(vpfe_dev,
 465                                 &vpfe_standards[vpfe_dev->std_index].std_id);
 466         if (ret)
 467                 return ret;
 468
 469         /* now open the ccdc device to initialize it */
 470         mutex_lock(&ccdc_lock);
 471         if (NULL == ccdc_dev) {
 472                 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
 473                 ret = -ENODEV;
 474                 goto unlock;
 475         }
 476
 477         if (!try_module_get(ccdc_dev->owner)) {
 478                 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
 479                 ret = -ENODEV;
 480                 goto unlock;
 481         }
 482         ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
 483         if (!ret)
 484                 vpfe_dev->initialized = 1;
 485 unlock:
 486         mutex_unlock(&ccdc_lock);
 487         return ret;
 488 }
 489
 490 /*
 491  * vpfe_open : It creates object of file handle structure and
 492  * stores it in private_data  member of filepointer
 493  */
 494 static int vpfe_open(struct file *file)
 495 {
 496         struct vpfe_device *vpfe_dev = video_drvdata(file);
 497         struct vpfe_fh *fh;
 498
 499         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
 500
 501         if (!vpfe_dev->cfg->num_subdevs) {
 502                 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
 503                 return -ENODEV;
 504         }
 505
 506         /* Allocate memory for the file handle object */
 507         fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
 508         if (NULL == fh) {
 509                 v4l2_err(&vpfe_dev->v4l2_dev,
 510                         "unable to allocate memory for file handle object\n");
 511                 return -ENOMEM;
 512         }
 513         /* store pointer to fh in private_data member of file */
 514         file->private_data = fh;
 515         fh->vpfe_dev = vpfe_dev;
 516         mutex_lock(&vpfe_dev->lock);
 517         /* If decoder is not initialized. initialize it */
 518         if (!vpfe_dev->initialized) {
 519                 if (vpfe_initialize_device(vpfe_dev)) {
 520                         mutex_unlock(&vpfe_dev->lock);
 521                         return -ENODEV;
 522                 }
 523         }
 524         /* Increment device usrs counter */
 525         vpfe_dev->usrs++;
 526         /* Set io_allowed member to false */
 527         fh->io_allowed = 0;
 528         /* Initialize priority of this instance to default priority */
 529         fh->prio = V4L2_PRIORITY_UNSET;
 530         v4l2_prio_open(&vpfe_dev->prio, &fh->prio);
 531         mutex_unlock(&vpfe_dev->lock);
 532         return 0;
 533 }
 534
 535 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
 536 {
 537         unsigned long addr;
 538
 539         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
 540                                         struct videobuf_buffer, queue);
 541         list_del(&vpfe_dev->next_frm->queue);
 542         vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
 543         addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
 544         ccdc_dev->hw_ops.setfbaddr(addr);
 545 }
 546
 547 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
 548 {
 549         struct timeval timevalue;
 550
 551         do_gettimeofday(&timevalue);
 552         vpfe_dev->cur_frm->ts = timevalue;
 553         vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
 554         vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
 555         wake_up_interruptible(&vpfe_dev->cur_frm->done);
 556         vpfe_dev->cur_frm = vpfe_dev->next_frm;
 557 }
 558
 559 /* ISR for VINT0*/
 560 static irqreturn_t vpfe_isr(int irq, void *dev_id)
 561 {
 562         struct vpfe_device *vpfe_dev = dev_id;
 563         enum v4l2_field field;
 564         unsigned long addr;
 565         int fid;
 566
 567         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
 568         field = vpfe_dev->fmt.fmt.pix.field;
 569
 570         /* if streaming not started, don't do anything */
 571         if (!vpfe_dev->started)
 572                 return IRQ_HANDLED;
 573
 574         /* only for 6446 this will be applicable */
 575         if (NULL != ccdc_dev->hw_ops.reset)
 576                 ccdc_dev->hw_ops.reset();
 577
 578         if (field == V4L2_FIELD_NONE) {
 579                 /* handle progressive frame capture */
 580                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
 581                         "frame format is progressive...\n");
 582                 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 583                         vpfe_process_buffer_complete(vpfe_dev);
 584                 return IRQ_HANDLED;
 585         }
 586
 587         /* interlaced or TB capture check which field we are in hardware */
 588         fid = ccdc_dev->hw_ops.getfid();
 589
 590         /* switch the software maintained field id */
 591         vpfe_dev->field_id ^= 1;
 592         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
 593                 fid, vpfe_dev->field_id);
 594         if (fid == vpfe_dev->field_id) {
 595                 /* we are in-sync here,continue */
 596                 if (fid == 0) {
 597                         /*
 598                          * One frame is just being captured. If the next frame
 599                          * is available, release the current frame and move on
 600                          */
 601                         if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 602                                 vpfe_process_buffer_complete(vpfe_dev);
 603                         /*
 604                          * based on whether the two fields are stored
 605                          * interleavely or separately in memory, reconfigure
 606                          * the CCDC memory address
 607                          */
 608                         if (field == V4L2_FIELD_SEQ_TB) {
 609                                 addr =
 610                                   videobuf_to_dma_contig(vpfe_dev->cur_frm);
 611                                 addr += vpfe_dev->field_off;
 612                                 ccdc_dev->hw_ops.setfbaddr(addr);
 613                         }
 614                         return IRQ_HANDLED;
 615                 }
 616                 /*
 617                  * if one field is just being captured configure
 618                  * the next frame get the next frame from the empty
 619                  * queue if no frame is available hold on to the
 620                  * current buffer
 621                  */
 622                 spin_lock(&vpfe_dev->dma_queue_lock);
 623                 if (!list_empty(&vpfe_dev->dma_queue) &&
 624                     vpfe_dev->cur_frm == vpfe_dev->next_frm)
 625                         vpfe_schedule_next_buffer(vpfe_dev);
 626                 spin_unlock(&vpfe_dev->dma_queue_lock);
 627         } else if (fid == 0) {
 628                 /*
 629                  * out of sync. Recover from any hardware out-of-sync.
 630                  * May loose one frame
 631                  */
 632                 vpfe_dev->field_id = fid;
 633         }
 634         return IRQ_HANDLED;
 635 }
 636
 637 /* vdint1_isr - isr handler for VINT1 interrupt */
 638 static irqreturn_t vdint1_isr(int irq, void *dev_id)
 639 {
 640         struct vpfe_device *vpfe_dev = dev_id;
 641
 642         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
 643
 644         /* if streaming not started, don't do anything */
 645         if (!vpfe_dev->started)
 646                 return IRQ_HANDLED;
 647
 648         spin_lock(&vpfe_dev->dma_queue_lock);
 649         if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
 650             !list_empty(&vpfe_dev->dma_queue) &&
 651             vpfe_dev->cur_frm == vpfe_dev->next_frm)
 652                 vpfe_schedule_next_buffer(vpfe_dev);
 653         spin_unlock(&vpfe_dev->dma_queue_lock);
 654         return IRQ_HANDLED;
 655 }
 656
 657 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
 658 {
 659         enum ccdc_frmfmt frame_format;
 660
 661         frame_format = ccdc_dev->hw_ops.get_frame_format();
 662         if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
 663                 free_irq(IRQ_VDINT1, vpfe_dev);
 664 }
 665
 666 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
 667 {
 668         enum ccdc_frmfmt frame_format;
 669
 670         frame_format = ccdc_dev->hw_ops.get_frame_format();
 671         if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
 672                 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
 673                                     IRQF_DISABLED, "vpfe_capture1",
 674                                     vpfe_dev);
 675         }
 676         return 0;
 677 }
 678
 679 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
 680 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
 681 {
 682         vpfe_dev->started = 0;
 683         ccdc_dev->hw_ops.enable(0);
 684         if (ccdc_dev->hw_ops.enable_out_to_sdram)
 685                 ccdc_dev->hw_ops.enable_out_to_sdram(0);
 686 }
 687
 688 /*
 689  * vpfe_release : This function deletes buffer queue, frees the
 690  * buffers and the vpfe file  handle
 691  */
 692 static int vpfe_release(struct file *file)
 693 {
 694         struct vpfe_device *vpfe_dev = video_drvdata(file);
 695         struct vpfe_fh *fh = file->private_data;
 696         struct vpfe_subdev_info *sdinfo;
 697         int ret;
 698
 699         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
 700
 701         /* Get the device lock */
 702         mutex_lock(&vpfe_dev->lock);
 703         /* if this instance is doing IO */
 704         if (fh->io_allowed) {
 705                 if (vpfe_dev->started) {
 706                         sdinfo = vpfe_dev->current_subdev;
 707                         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 708                                                          sdinfo->grp_id,
 709                                                          video, s_stream, 0);
 710                         if (ret && (ret != -ENOIOCTLCMD))
 711                                 v4l2_err(&vpfe_dev->v4l2_dev,
 712                                 "stream off failed in subdev\n");
 713                         vpfe_stop_ccdc_capture(vpfe_dev);
 714                         vpfe_detach_irq(vpfe_dev);
 715                         videobuf_streamoff(&vpfe_dev->buffer_queue);
 716                 }
 717                 vpfe_dev->io_usrs = 0;
 718                 vpfe_dev->numbuffers = config_params.numbuffers;
 719         }
 720
 721         /* Decrement device usrs counter */
 722         vpfe_dev->usrs--;
 723         /* Close the priority */
 724         v4l2_prio_close(&vpfe_dev->prio, &fh->prio);
 725         /* If this is the last file handle */
 726         if (!vpfe_dev->usrs) {
 727                 vpfe_dev->initialized = 0;
 728                 if (ccdc_dev->hw_ops.close)
 729                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
 730                 module_put(ccdc_dev->owner);
 731         }
 732         mutex_unlock(&vpfe_dev->lock);
 733         file->private_data = NULL;
 734         /* Free memory allocated to file handle object */
 735         kfree(fh);
 736         return 0;
 737 }
 738
 739 /*
 740  * vpfe_mmap : It is used to map kernel space buffers
 741  * into user spaces
 742  */
 743 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
 744 {
 745         /* Get the device object and file handle object */
 746         struct vpfe_device *vpfe_dev = video_drvdata(file);
 747
 748         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
 749
 750         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
 751 }
 752
 753 /*
 754  * vpfe_poll: It is used for select/poll system call
 755  */
 756 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
 757 {
 758         struct vpfe_device *vpfe_dev = video_drvdata(file);
 759
 760         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
 761
 762         if (vpfe_dev->started)
 763                 return videobuf_poll_stream(file,
 764                                             &vpfe_dev->buffer_queue, wait);
 765         return 0;
 766 }
 767
 768 /* vpfe capture driver file operations */
 769 static const struct v4l2_file_operations vpfe_fops = {
 770         .owner = THIS_MODULE,
 771         .open = vpfe_open,
 772         .release = vpfe_release,
 773         .unlocked_ioctl = video_ioctl2,
 774         .mmap = vpfe_mmap,
 775         .poll = vpfe_poll
 776 };
 777
 778 /*
 779  * vpfe_check_format()
 780  * This function adjust the input pixel format as per hardware
 781  * capabilities and update the same in pixfmt.
 782  * Following algorithm used :-
 783  *
 784  *      If given pixformat is not in the vpfe list of pix formats or not
 785  *      supported by the hardware, current value of pixformat in the device
 786  *      is used
 787  *      If given field is not supported, then current field is used. If field
 788  *      is different from current, then it is matched with that from sub device.
 789  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
 790  *      progressive. Maximum height is clamped to active active lines of scan
 791  *      Minimum width is 32 bytes in memory and width is clamped to active
 792  *      pixels of scan.
 793  *      bytesperline is a multiple of 32.
 794  */
 795 static const struct vpfe_pixel_format *
 796         vpfe_check_format(struct vpfe_device *vpfe_dev,
 797                           struct v4l2_pix_format *pixfmt)
 798 {
 799         u32 min_height = 1, min_width = 32, max_width, max_height;
 800         const struct vpfe_pixel_format *vpfe_pix_fmt;
 801         u32 pix;
 802         int temp, found;
 803
 804         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 805         if (NULL == vpfe_pix_fmt) {
 806                 /*
 807                  * use current pixel format in the vpfe device. We
 808                  * will find this pix format in the table
 809                  */
 810                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 811                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 812         }
 813
 814         /* check if hw supports it */
 815         temp = 0;
 816         found = 0;
 817         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
 818                 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
 819                         found = 1;
 820                         break;
 821                 }
 822                 temp++;
 823         }
 824
 825         if (!found) {
 826                 /* use current pixel format */
 827                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 828                 /*
 829                  * Since this is currently used in the vpfe device, we
 830                  * will find this pix format in the table
 831                  */
 832                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 833         }
 834
 835         /* check what field format is supported */
 836         if (pixfmt->field == V4L2_FIELD_ANY) {
 837                 /* if field is any, use current value as default */
 838                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 839         }
 840
 841         /*
 842          * if field is not same as current field in the vpfe device
 843          * try matching the field with the sub device field
 844          */
 845         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
 846                 /*
 847                  * If field value is not in the supported fields, use current
 848                  * field used in the device as default
 849                  */
 850                 switch (pixfmt->field) {
 851                 case V4L2_FIELD_INTERLACED:
 852                 case V4L2_FIELD_SEQ_TB:
 853                         /* if sub device is supporting progressive, use that */
 854                         if (!vpfe_dev->std_info.frame_format)
 855                                 pixfmt->field = V4L2_FIELD_NONE;
 856                         break;
 857                 case V4L2_FIELD_NONE:
 858                         if (vpfe_dev->std_info.frame_format)
 859                                 pixfmt->field = V4L2_FIELD_INTERLACED;
 860                         break;
 861
 862                 default:
 863                         /* use current field as default */
 864                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 865                         break;
 866                 }
 867         }
 868
 869         /* Now adjust image resolutions supported */
 870         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
 871             pixfmt->field == V4L2_FIELD_SEQ_TB)
 872                 min_height = 2;
 873
 874         max_width = vpfe_dev->std_info.active_pixels;
 875         max_height = vpfe_dev->std_info.active_lines;
 876         min_width /= vpfe_pix_fmt->bpp;
 877
 878         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
 879                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
 880
 881         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
 882         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
 883
 884         /* If interlaced, adjust height to be a multiple of 2 */
 885         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 886                 pixfmt->height &= (~1);
 887         /*
 888          * recalculate bytesperline and sizeimage since width
 889          * and height might have changed
 890          */
 891         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
 892                                 & ~31);
 893         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 894                 pixfmt->sizeimage =
 895                         pixfmt->bytesperline * pixfmt->height +
 896                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
 897         else
 898                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 899
 900         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
 901                  " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
 902                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
 903                  pixfmt->bytesperline, pixfmt->sizeimage);
 904         return vpfe_pix_fmt;
 905 }
 906
 907 static int vpfe_querycap(struct file *file, void  *priv,
 908                                struct v4l2_capability *cap)
 909 {
 910         struct vpfe_device *vpfe_dev = video_drvdata(file);
 911
 912         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
 913
 914         cap->version = VPFE_CAPTURE_VERSION_CODE;
 915         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 916         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 917         strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
 918         strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
 919         return 0;
 920 }
 921
 922 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
 923                                 struct v4l2_format *fmt)
 924 {
 925         struct vpfe_device *vpfe_dev = video_drvdata(file);
 926         int ret = 0;
 927
 928         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
 929         /* Fill in the information about format */
 930         *fmt = vpfe_dev->fmt;
 931         return ret;
 932 }
 933
 934 static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
 935                                    struct v4l2_fmtdesc *fmt)
 936 {
 937         struct vpfe_device *vpfe_dev = video_drvdata(file);
 938         const struct vpfe_pixel_format *pix_fmt;
 939         int temp_index;
 940         u32 pix;
 941
 942         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
 943
 944         if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
 945                 return -EINVAL;
 946
 947         /* Fill in the information about format */
 948         pix_fmt = vpfe_lookup_pix_format(pix);
 949         if (NULL != pix_fmt) {
 950                 temp_index = fmt->index;
 951                 *fmt = pix_fmt->fmtdesc;
 952                 fmt->index = temp_index;
 953                 return 0;
 954         }
 955         return -EINVAL;
 956 }
 957
 958 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
 959                                 struct v4l2_format *fmt)
 960 {
 961         struct vpfe_device *vpfe_dev = video_drvdata(file);
 962         const struct vpfe_pixel_format *pix_fmts;
 963         int ret = 0;
 964
 965         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
 966
 967         /* If streaming is started, return error */
 968         if (vpfe_dev->started) {
 969                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
 970                 return -EBUSY;
 971         }
 972
 973         /* Check for valid frame format */
 974         pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
 975
 976         if (NULL == pix_fmts)
 977                 return -EINVAL;
 978
 979         /* store the pixel format in the device  object */
 980         ret = mutex_lock_interruptible(&vpfe_dev->lock);
 981         if (ret)
 982                 return ret;
 983
 984         /* First detach any IRQ if currently attached */
 985         vpfe_detach_irq(vpfe_dev);
 986         vpfe_dev->fmt = *fmt;
 987         /* set image capture parameters in the ccdc */
 988         ret = vpfe_config_ccdc_image_format(vpfe_dev);
 989         mutex_unlock(&vpfe_dev->lock);
 990         return ret;
 991 }
 992
 993 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
 994                                   struct v4l2_format *f)
 995 {
 996         struct vpfe_device *vpfe_dev = video_drvdata(file);
 997         const struct vpfe_pixel_format *pix_fmts;
 998
 999         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1000
1001         pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1002         if (NULL == pix_fmts)
1003                 return -EINVAL;
1004         return 0;
1005 }
1006
1007 /*
1008  * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1009  * given app input index
1010  */
1011 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1012                                         int *subdev_index,
1013                                         int *subdev_input_index,
1014                                         int app_input_index)
1015 {
1016         struct vpfe_config *cfg = vpfe_dev->cfg;
1017         struct vpfe_subdev_info *sdinfo;
1018         int i, j = 0;
1019
1020         for (i = 0; i < cfg->num_subdevs; i++) {
1021                 sdinfo = &cfg->sub_devs[i];
1022                 if (app_input_index < (j + sdinfo->num_inputs)) {
1023                         *subdev_index = i;
1024                         *subdev_input_index = app_input_index - j;
1025                         return 0;
1026                 }
1027                 j += sdinfo->num_inputs;
1028         }
1029         return -EINVAL;
1030 }
1031
1032 /*
1033  * vpfe_get_app_input - Get app input index for a given subdev input index
1034  * driver stores the input index of the current sub device and translate it
1035  * when application request the current input
1036  */
1037 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1038                                     int *app_input_index)
1039 {
1040         struct vpfe_config *cfg = vpfe_dev->cfg;
1041         struct vpfe_subdev_info *sdinfo;
1042         int i, j = 0;
1043
1044         for (i = 0; i < cfg->num_subdevs; i++) {
1045                 sdinfo = &cfg->sub_devs[i];
1046                 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1047                         if (vpfe_dev->current_input >= sdinfo->num_inputs)
1048                                 return -1;
1049                         *app_input_index = j + vpfe_dev->current_input;
1050                         return 0;
1051                 }
1052                 j += sdinfo->num_inputs;
1053         }
1054         return -EINVAL;
1055 }
1056
1057 static int vpfe_enum_input(struct file *file, void *priv,
1058                                  struct v4l2_input *inp)
1059 {
1060         struct vpfe_device *vpfe_dev = video_drvdata(file);
1061         struct vpfe_subdev_info *sdinfo;
1062         int subdev, index ;
1063
1064         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1065
1066         if (vpfe_get_subdev_input_index(vpfe_dev,
1067                                         &subdev,
1068                                         &index,
1069                                         inp->index) < 0) {
1070                 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
1071                          " for the subdev\n");
1072                 return -EINVAL;
1073         }
1074         sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1075         memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
1076         return 0;
1077 }
1078
1079 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1080 {
1081         struct vpfe_device *vpfe_dev = video_drvdata(file);
1082
1083         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1084
1085         return vpfe_get_app_input_index(vpfe_dev, index);
1086 }
1087
1088
1089 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1090 {
1091         struct vpfe_device *vpfe_dev = video_drvdata(file);
1092         struct vpfe_subdev_info *sdinfo;
1093         int subdev_index, inp_index;
1094         struct vpfe_route *route;
1095         u32 input = 0, output = 0;
1096         int ret = -EINVAL;
1097
1098         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1099
1100         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1101         if (ret)
1102                 return ret;
1103
1104         /*
1105          * If streaming is started return device busy
1106          * error
1107          */
1108         if (vpfe_dev->started) {
1109                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1110                 ret = -EBUSY;
1111                 goto unlock_out;
1112         }
1113
1114         if (vpfe_get_subdev_input_index(vpfe_dev,
1115                                         &subdev_index,
1116                                         &inp_index,
1117                                         index) < 0) {
1118                 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1119                 goto unlock_out;
1120         }
1121
1122         sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1123         route = &sdinfo->routes[inp_index];
1124         if (route && sdinfo->can_route) {
1125                 input = route->input;
1126                 output = route->output;
1127         }
1128
1129         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1130                                          video, s_routing, input, output, 0);
1131
1132         if (ret) {
1133                 v4l2_err(&vpfe_dev->v4l2_dev,
1134                         "vpfe_doioctl:error in setting input in decoder\n");
1135                 ret = -EINVAL;
1136                 goto unlock_out;
1137         }
1138         vpfe_dev->current_subdev = sdinfo;
1139         vpfe_dev->current_input = index;
1140         vpfe_dev->std_index = 0;
1141
1142         /* set the bus/interface parameter for the sub device in ccdc */
1143         ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1144         if (ret)
1145                 goto unlock_out;
1146
1147         /* set the default image parameters in the device */
1148         ret = vpfe_config_image_format(vpfe_dev,
1149                                 &vpfe_standards[vpfe_dev->std_index].std_id);
1150 unlock_out:
1151         mutex_unlock(&vpfe_dev->lock);
1152         return ret;
1153 }
1154
1155 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1156 {
1157         struct vpfe_device *vpfe_dev = video_drvdata(file);
1158         struct vpfe_subdev_info *sdinfo;
1159         int ret = 0;
1160
1161         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1162
1163         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1164         sdinfo = vpfe_dev->current_subdev;
1165         if (ret)
1166                 return ret;
1167         /* Call querystd function of decoder device */
1168         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1169                                          video, querystd, std_id);
1170         mutex_unlock(&vpfe_dev->lock);
1171         return ret;
1172 }
1173
1174 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1175 {
1176         struct vpfe_device *vpfe_dev = video_drvdata(file);
1177         struct vpfe_subdev_info *sdinfo;
1178         int ret = 0;
1179
1180         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1181
1182         /* Call decoder driver function to set the standard */
1183         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1184         if (ret)
1185                 return ret;
1186
1187         sdinfo = vpfe_dev->current_subdev;
1188         /* If streaming is started, return device busy error */
1189         if (vpfe_dev->started) {
1190                 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1191                 ret = -EBUSY;
1192                 goto unlock_out;
1193         }
1194
1195         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1196                                          core, s_std, *std_id);
1197         if (ret < 0) {
1198                 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1199                 goto unlock_out;
1200         }
1201         ret = vpfe_config_image_format(vpfe_dev, std_id);
1202
1203 unlock_out:
1204         mutex_unlock(&vpfe_dev->lock);
1205         return ret;
1206 }
1207
1208 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1209 {
1210         struct vpfe_device *vpfe_dev = video_drvdata(file);
1211
1212         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1213
1214         *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1215         return 0;
1216 }
1217 /*
1218  *  Videobuf operations
1219  */
1220 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1221                                 unsigned int *count,
1222                                 unsigned int *size)
1223 {
1224         struct vpfe_fh *fh = vq->priv_data;
1225         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1226
1227         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1228         *size = config_params.device_bufsize;
1229
1230         if (*count < config_params.min_numbuffers)
1231                 *count = config_params.min_numbuffers;
1232         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1233                 "count=%d, size=%d\n", *count, *size);
1234         return 0;
1235 }
1236
1237 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1238                                 struct videobuf_buffer *vb,
1239                                 enum v4l2_field field)
1240 {
1241         struct vpfe_fh *fh = vq->priv_data;
1242         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1243
1244         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1245
1246         /* If buffer is not initialized, initialize it */
1247         if (VIDEOBUF_NEEDS_INIT == vb->state) {
1248                 vb->width = vpfe_dev->fmt.fmt.pix.width;
1249                 vb->height = vpfe_dev->fmt.fmt.pix.height;
1250                 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1251                 vb->field = field;
1252         }
1253         vb->state = VIDEOBUF_PREPARED;
1254         return 0;
1255 }
1256
1257 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1258                                 struct videobuf_buffer *vb)
1259 {
1260         /* Get the file handle object and device object */
1261         struct vpfe_fh *fh = vq->priv_data;
1262         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1263         unsigned long flags;
1264
1265         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1266
1267         /* add the buffer to the DMA queue */
1268         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1269         list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1270         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1271
1272         /* Change state of the buffer */
1273         vb->state = VIDEOBUF_QUEUED;
1274 }
1275
1276 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1277                                   struct videobuf_buffer *vb)
1278 {
1279         struct vpfe_fh *fh = vq->priv_data;
1280         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1281         unsigned long flags;
1282
1283         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1284
1285         /*
1286          * We need to flush the buffer from the dma queue since
1287          * they are de-allocated
1288          */
1289         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1290         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1291         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1292         videobuf_dma_contig_free(vq, vb);
1293         vb->state = VIDEOBUF_NEEDS_INIT;
1294 }
1295
1296 static struct videobuf_queue_ops vpfe_videobuf_qops = {
1297         .buf_setup      = vpfe_videobuf_setup,
1298         .buf_prepare    = vpfe_videobuf_prepare,
1299         .buf_queue      = vpfe_videobuf_queue,
1300         .buf_release    = vpfe_videobuf_release,
1301 };
1302
1303 /*
1304  * vpfe_reqbufs. currently support REQBUF only once opening
1305  * the device.
1306  */
1307 static int vpfe_reqbufs(struct file *file, void *priv,
1308                         struct v4l2_requestbuffers *req_buf)
1309 {
1310         struct vpfe_device *vpfe_dev = video_drvdata(file);
1311         struct vpfe_fh *fh = file->private_data;
1312         int ret = 0;
1313
1314         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1315
1316         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1317                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1318                 return -EINVAL;
1319         }
1320
1321         if (V4L2_MEMORY_USERPTR == req_buf->memory) {
1322                 /* we don't support user ptr IO */
1323                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs:"
1324                          " USERPTR IO not supported\n");
1325                 return  -EINVAL;
1326         }
1327
1328         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1329         if (ret)
1330                 return ret;
1331
1332         if (vpfe_dev->io_usrs != 0) {
1333                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1334                 ret = -EBUSY;
1335                 goto unlock_out;
1336         }
1337
1338         vpfe_dev->memory = req_buf->memory;
1339         videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1340                                 &vpfe_videobuf_qops,
1341                                 NULL,
1342                                 &vpfe_dev->irqlock,
1343                                 req_buf->type,
1344                                 vpfe_dev->fmt.fmt.pix.field,
1345                                 sizeof(struct videobuf_buffer),
1346                                 fh);
1347
1348         fh->io_allowed = 1;
1349         vpfe_dev->io_usrs = 1;
1350         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1351         ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1352 unlock_out:
1353         mutex_unlock(&vpfe_dev->lock);
1354         return ret;
1355 }
1356
1357 static int vpfe_querybuf(struct file *file, void *priv,
1358                          struct v4l2_buffer *buf)
1359 {
1360         struct vpfe_device *vpfe_dev = video_drvdata(file);
1361
1362         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1363
1364         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1365                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1366                 return  -EINVAL;
1367         }
1368
1369         if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1370                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1371                 return -EINVAL;
1372         }
1373         /* Call videobuf_querybuf to get information */
1374         return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1375 }
1376
1377 static int vpfe_qbuf(struct file *file, void *priv,
1378                      struct v4l2_buffer *p)
1379 {
1380         struct vpfe_device *vpfe_dev = video_drvdata(file);
1381         struct vpfe_fh *fh = file->private_data;
1382
1383         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1384
1385         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1386                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1387                 return -EINVAL;
1388         }
1389
1390         /*
1391          * If this file handle is not allowed to do IO,
1392          * return error
1393          */
1394         if (!fh->io_allowed) {
1395                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1396                 return -EACCES;
1397         }
1398         return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1399 }
1400
1401 static int vpfe_dqbuf(struct file *file, void *priv,
1402                       struct v4l2_buffer *buf)
1403 {
1404         struct vpfe_device *vpfe_dev = video_drvdata(file);
1405
1406         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1407
1408         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1409                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1410                 return -EINVAL;
1411         }
1412         return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1413                                       buf, file->f_flags & O_NONBLOCK);
1414 }
1415
1416 /*
1417  * vpfe_calculate_offsets : This function calculates buffers offset
1418  * for top and bottom field
1419  */
1420 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1421 {
1422         struct v4l2_rect image_win;
1423
1424         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1425
1426         ccdc_dev->hw_ops.get_image_window(&image_win);
1427         vpfe_dev->field_off = image_win.height * image_win.width;
1428 }
1429
1430 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1431 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1432 {
1433         ccdc_dev->hw_ops.enable(1);
1434         if (ccdc_dev->hw_ops.enable_out_to_sdram)
1435                 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1436         vpfe_dev->started = 1;
1437 }
1438
1439 /*
1440  * vpfe_streamon. Assume the DMA queue is not empty.
1441  * application is expected to call QBUF before calling
1442  * this ioctl. If not, driver returns error
1443  */
1444 static int vpfe_streamon(struct file *file, void *priv,
1445                          enum v4l2_buf_type buf_type)
1446 {
1447         struct vpfe_device *vpfe_dev = video_drvdata(file);
1448         struct vpfe_fh *fh = file->private_data;
1449         struct vpfe_subdev_info *sdinfo;
1450         unsigned long addr;
1451         int ret = 0;
1452
1453         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1454
1455         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1456                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1457                 return -EINVAL;
1458         }
1459
1460         /* If file handle is not allowed IO, return error */
1461         if (!fh->io_allowed) {
1462                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1463                 return -EACCES;
1464         }
1465
1466         sdinfo = vpfe_dev->current_subdev;
1467         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1468                                         video, s_stream, 1);
1469
1470         if (ret && (ret != -ENOIOCTLCMD)) {
1471                 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1472                 return -EINVAL;
1473         }
1474
1475         /* If buffer queue is empty, return error */
1476         if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1477                 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1478                 return -EIO;
1479         }
1480
1481         /* Call videobuf_streamon to start streaming * in videobuf */
1482         ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1483         if (ret)
1484                 return ret;
1485
1486
1487         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1488         if (ret)
1489                 goto streamoff;
1490         /* Get the next frame from the buffer queue */
1491         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1492                                         struct videobuf_buffer, queue);
1493         vpfe_dev->cur_frm = vpfe_dev->next_frm;
1494         /* Remove buffer from the buffer queue */
1495         list_del(&vpfe_dev->cur_frm->queue);
1496         /* Mark state of the current frame to active */
1497         vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1498         /* Initialize field_id and started member */
1499         vpfe_dev->field_id = 0;
1500         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1501
1502         /* Calculate field offset */
1503         vpfe_calculate_offsets(vpfe_dev);
1504
1505         if (vpfe_attach_irq(vpfe_dev) < 0) {
1506                 v4l2_err(&vpfe_dev->v4l2_dev,
1507                          "Error in attaching interrupt handle\n");
1508                 ret = -EFAULT;
1509                 goto unlock_out;
1510         }
1511         if (ccdc_dev->hw_ops.configure() < 0) {
1512                 v4l2_err(&vpfe_dev->v4l2_dev,
1513                          "Error in configuring ccdc\n");
1514                 ret = -EINVAL;
1515                 goto unlock_out;
1516         }
1517         ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1518         vpfe_start_ccdc_capture(vpfe_dev);
1519         mutex_unlock(&vpfe_dev->lock);
1520         return ret;
1521 unlock_out:
1522         mutex_unlock(&vpfe_dev->lock);
1523 streamoff:
1524         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1525         return ret;
1526 }
1527
1528 static int vpfe_streamoff(struct file *file, void *priv,
1529                           enum v4l2_buf_type buf_type)
1530 {
1531         struct vpfe_device *vpfe_dev = video_drvdata(file);
1532         struct vpfe_fh *fh = file->private_data;
1533         struct vpfe_subdev_info *sdinfo;
1534         int ret = 0;
1535
1536         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1537
1538         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1539                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1540                 return -EINVAL;
1541         }
1542
1543         /* If io is allowed for this file handle, return error */
1544         if (!fh->io_allowed) {
1545                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1546                 return -EACCES;
1547         }
1548
1549         /* If streaming is not started, return error */
1550         if (!vpfe_dev->started) {
1551                 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1552                 return -EINVAL;
1553         }
1554
1555         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1556         if (ret)
1557                 return ret;
1558
1559         vpfe_stop_ccdc_capture(vpfe_dev);
1560         vpfe_detach_irq(vpfe_dev);
1561
1562         sdinfo = vpfe_dev->current_subdev;
1563         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1564                                         video, s_stream, 0);
1565
1566         if (ret && (ret != -ENOIOCTLCMD))
1567                 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1568         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1569         mutex_unlock(&vpfe_dev->lock);
1570         return ret;
1571 }
1572
1573 static int vpfe_cropcap(struct file *file, void *priv,
1574                               struct v4l2_cropcap *crop)
1575 {
1576         struct vpfe_device *vpfe_dev = video_drvdata(file);
1577
1578         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1579
1580         if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1581                 return -EINVAL;
1582
1583         memset(crop, 0, sizeof(struct v4l2_cropcap));
1584         crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1585         crop->bounds.width = crop->defrect.width =
1586                 vpfe_standards[vpfe_dev->std_index].width;
1587         crop->bounds.height = crop->defrect.height =
1588                 vpfe_standards[vpfe_dev->std_index].height;
1589         crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1590         return 0;
1591 }
1592
1593 static int vpfe_g_crop(struct file *file, void *priv,
1594                              struct v4l2_crop *crop)
1595 {
1596         struct vpfe_device *vpfe_dev = video_drvdata(file);
1597
1598         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
1599
1600         crop->c = vpfe_dev->crop;
1601         return 0;
1602 }
1603
1604 static int vpfe_s_crop(struct file *file, void *priv,
1605                              struct v4l2_crop *crop)
1606 {
1607         struct vpfe_device *vpfe_dev = video_drvdata(file);
1608         int ret = 0;
1609
1610         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
1611
1612         if (vpfe_dev->started) {
1613                 /* make sure streaming is not started */
1614                 v4l2_err(&vpfe_dev->v4l2_dev,
1615                         "Cannot change crop when streaming is ON\n");
1616                 return -EBUSY;
1617         }
1618
1619         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1620         if (ret)
1621                 return ret;
1622
1623         if (crop->c.top < 0 || crop->c.left < 0) {
1624                 v4l2_err(&vpfe_dev->v4l2_dev,
1625                         "doesn't support negative values for top & left\n");
1626                 ret = -EINVAL;
1627                 goto unlock_out;
1628         }
1629
1630         /* adjust the width to 16 pixel boundry */
1631         crop->c.width = ((crop->c.width + 15) & ~0xf);
1632
1633         /* make sure parameters are valid */
1634         if ((crop->c.left + crop->c.width >
1635                 vpfe_dev->std_info.active_pixels) ||
1636             (crop->c.top + crop->c.height >
1637                 vpfe_dev->std_info.active_lines)) {
1638                 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
1639                 ret = -EINVAL;
1640                 goto unlock_out;
1641         }
1642         ccdc_dev->hw_ops.set_image_window(&crop->c);
1643         vpfe_dev->fmt.fmt.pix.width = crop->c.width;
1644         vpfe_dev->fmt.fmt.pix.height = crop->c.height;
1645         vpfe_dev->fmt.fmt.pix.bytesperline =
1646                 ccdc_dev->hw_ops.get_line_length();
1647         vpfe_dev->fmt.fmt.pix.sizeimage =
1648                 vpfe_dev->fmt.fmt.pix.bytesperline *
1649                 vpfe_dev->fmt.fmt.pix.height;
1650         vpfe_dev->crop = crop->c;
1651 unlock_out:
1652         mutex_unlock(&vpfe_dev->lock);
1653         return ret;
1654 }
1655
1656
1657 static long vpfe_param_handler(struct file *file, void *priv,
1658                 int cmd, void *param)
1659 {
1660         struct vpfe_device *vpfe_dev = video_drvdata(file);
1661         int ret = 0;
1662
1663         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1664
1665         if (vpfe_dev->started) {
1666                 /* only allowed if streaming is not started */
1667                 v4l2_err(&vpfe_dev->v4l2_dev, "device already started\n");
1668                 return -EBUSY;
1669         }
1670
1671         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1672         if (ret)
1673                 return ret;
1674
1675         switch (cmd) {
1676         case VPFE_CMD_S_CCDC_RAW_PARAMS:
1677                 v4l2_warn(&vpfe_dev->v4l2_dev,
1678                           "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1679                 ret = ccdc_dev->hw_ops.set_params(param);
1680                 if (ret) {
1681                         v4l2_err(&vpfe_dev->v4l2_dev,
1682                                 "Error in setting parameters in CCDC\n");
1683                         goto unlock_out;
1684                 }
1685                 if (vpfe_get_ccdc_image_format(vpfe_dev, &vpfe_dev->fmt) < 0) {
1686                         v4l2_err(&vpfe_dev->v4l2_dev,
1687                                 "Invalid image format at CCDC\n");
1688                         goto unlock_out;
1689                 }
1690                 break;
1691         default:
1692                 ret = -EINVAL;
1693         }
1694 unlock_out:
1695         mutex_unlock(&vpfe_dev->lock);
1696         return ret;
1697 }
1698
1699
1700 /* vpfe capture ioctl operations */
1701 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1702         .vidioc_querycap         = vpfe_querycap,
1703         .vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1704         .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1705         .vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1706         .vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1707         .vidioc_enum_input       = vpfe_enum_input,
1708         .vidioc_g_input          = vpfe_g_input,
1709         .vidioc_s_input          = vpfe_s_input,
1710         .vidioc_querystd         = vpfe_querystd,
1711         .vidioc_s_std            = vpfe_s_std,
1712         .vidioc_g_std            = vpfe_g_std,
1713         .vidioc_reqbufs          = vpfe_reqbufs,
1714         .vidioc_querybuf         = vpfe_querybuf,
1715         .vidioc_qbuf             = vpfe_qbuf,
1716         .vidioc_dqbuf            = vpfe_dqbuf,
1717         .vidioc_streamon         = vpfe_streamon,
1718         .vidioc_streamoff        = vpfe_streamoff,
1719         .vidioc_cropcap          = vpfe_cropcap,
1720         .vidioc_g_crop           = vpfe_g_crop,
1721         .vidioc_s_crop           = vpfe_s_crop,
1722         .vidioc_default          = vpfe_param_handler,
1723 };
1724
1725 static struct vpfe_device *vpfe_initialize(void)
1726 {
1727         struct vpfe_device *vpfe_dev;
1728
1729         /* Default number of buffers should be 3 */
1730         if ((numbuffers > 0) &&
1731             (numbuffers < config_params.min_numbuffers))
1732                 numbuffers = config_params.min_numbuffers;
1733
1734         /*
1735          * Set buffer size to min buffers size if invalid buffer size is
1736          * given
1737          */
1738         if (bufsize < config_params.min_bufsize)
1739                 bufsize = config_params.min_bufsize;
1740
1741         config_params.numbuffers = numbuffers;
1742
1743         if (numbuffers)
1744                 config_params.device_bufsize = bufsize;
1745
1746         /* Allocate memory for device objects */
1747         vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1748
1749         return vpfe_dev;
1750 }
1751
1752 static void vpfe_disable_clock(struct vpfe_device *vpfe_dev)
1753 {
1754         struct vpfe_config *vpfe_cfg = vpfe_dev->cfg;
1755
1756         clk_disable(vpfe_cfg->vpssclk);
1757         clk_put(vpfe_cfg->vpssclk);
1758         clk_disable(vpfe_cfg->slaveclk);
1759         clk_put(vpfe_cfg->slaveclk);
1760         v4l2_info(vpfe_dev->pdev->driver,
1761                  "vpfe vpss master & slave clocks disabled\n");
1762 }
1763
1764 static int vpfe_enable_clock(struct vpfe_device *vpfe_dev)
1765 {
1766         struct vpfe_config *vpfe_cfg = vpfe_dev->cfg;
1767         int ret = -ENOENT;
1768
1769         vpfe_cfg->vpssclk = clk_get(vpfe_dev->pdev, "vpss_master");
1770         if (NULL == vpfe_cfg->vpssclk) {
1771                 v4l2_err(vpfe_dev->pdev->driver, "No clock defined for"
1772                          "vpss_master\n");
1773                 return ret;
1774         }
1775
1776         if (clk_enable(vpfe_cfg->vpssclk)) {
1777                 v4l2_err(vpfe_dev->pdev->driver,
1778                         "vpfe vpss master clock not enabled\n");
1779                 goto out;
1780         }
1781         v4l2_info(vpfe_dev->pdev->driver,
1782                  "vpfe vpss master clock enabled\n");
1783
1784         vpfe_cfg->slaveclk = clk_get(vpfe_dev->pdev, "vpss_slave");
1785         if (NULL == vpfe_cfg->slaveclk) {
1786                 v4l2_err(vpfe_dev->pdev->driver,
1787                         "No clock defined for vpss slave\n");
1788                 goto out;
1789         }
1790
1791         if (clk_enable(vpfe_cfg->slaveclk)) {
1792                 v4l2_err(vpfe_dev->pdev->driver,
1793                          "vpfe vpss slave clock not enabled\n");
1794                 goto out;
1795         }
1796         v4l2_info(vpfe_dev->pdev->driver, "vpfe vpss slave clock enabled\n");
1797         return 0;
1798 out:
1799         if (vpfe_cfg->vpssclk)
1800                 clk_put(vpfe_cfg->vpssclk);
1801         if (vpfe_cfg->slaveclk)
1802                 clk_put(vpfe_cfg->slaveclk);
1803
1804         return -1;
1805 }
1806
1807 /*
1808  * vpfe_probe : This function creates device entries by register
1809  * itself to the V4L2 driver and initializes fields of each
1810  * device objects
1811  */
1812 static __init int vpfe_probe(struct platform_device *pdev)
1813 {
1814         struct vpfe_subdev_info *sdinfo;
1815         struct vpfe_config *vpfe_cfg;
1816         struct resource *res1;
1817         struct vpfe_device *vpfe_dev;
1818         struct i2c_adapter *i2c_adap;
1819         struct video_device *vfd;
1820         int ret = -ENOMEM, i, j;
1821         int num_subdevs = 0;
1822
1823         /* Get the pointer to the device object */
1824         vpfe_dev = vpfe_initialize();
1825
1826         if (!vpfe_dev) {
1827                 v4l2_err(pdev->dev.driver,
1828                         "Failed to allocate memory for vpfe_dev\n");
1829                 return ret;
1830         }
1831
1832         vpfe_dev->pdev = &pdev->dev;
1833
1834         if (NULL == pdev->dev.platform_data) {
1835                 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1836                 ret = -ENOENT;
1837                 goto probe_free_dev_mem;
1838         }
1839
1840         vpfe_cfg = pdev->dev.platform_data;
1841         vpfe_dev->cfg = vpfe_cfg;
1842         if (NULL == vpfe_cfg->ccdc ||
1843             NULL == vpfe_cfg->card_name ||
1844             NULL == vpfe_cfg->sub_devs) {
1845                 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1846                 ret = -ENOENT;
1847                 goto probe_free_dev_mem;
1848         }
1849
1850         /* enable vpss clocks */
1851         ret = vpfe_enable_clock(vpfe_dev);
1852         if (ret)
1853                 goto probe_free_dev_mem;
1854
1855         mutex_lock(&ccdc_lock);
1856         /* Allocate memory for ccdc configuration */
1857         ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
1858         if (NULL == ccdc_cfg) {
1859                 v4l2_err(pdev->dev.driver,
1860                          "Memory allocation failed for ccdc_cfg\n");
1861                 goto probe_disable_clock;
1862         }
1863
1864         strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1865         /* Get VINT0 irq resource */
1866         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1867         if (!res1) {
1868                 v4l2_err(pdev->dev.driver,
1869                          "Unable to get interrupt for VINT0\n");
1870                 ret = -ENOENT;
1871                 goto probe_disable_clock;
1872         }
1873         vpfe_dev->ccdc_irq0 = res1->start;
1874
1875         /* Get VINT1 irq resource */
1876         res1 = platform_get_resource(pdev,
1877                                 IORESOURCE_IRQ, 1);
1878         if (!res1) {
1879                 v4l2_err(pdev->dev.driver,
1880                          "Unable to get interrupt for VINT1\n");
1881                 ret = -ENOENT;
1882                 goto probe_disable_clock;
1883         }
1884         vpfe_dev->ccdc_irq1 = res1->start;
1885
1886         /* Get address base of CCDC */
1887         res1 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1888         if (!res1) {
1889                 v4l2_err(pdev->dev.driver,
1890                         "Unable to get register address map\n");
1891                 ret = -ENOENT;
1892                 goto probe_disable_clock;
1893         }
1894
1895         ccdc_cfg->ccdc_addr_size = res1->end - res1->start + 1;
1896         if (!request_mem_region(res1->start, ccdc_cfg->ccdc_addr_size,
1897                                 pdev->dev.driver->name)) {
1898                 v4l2_err(pdev->dev.driver,
1899                         "Failed request_mem_region for ccdc base\n");
1900                 ret = -ENXIO;
1901                 goto probe_disable_clock;
1902         }
1903         ccdc_cfg->ccdc_addr = ioremap_nocache(res1->start,
1904                                              ccdc_cfg->ccdc_addr_size);
1905         if (!ccdc_cfg->ccdc_addr) {
1906                 v4l2_err(pdev->dev.driver, "Unable to ioremap ccdc addr\n");
1907                 ret = -ENXIO;
1908                 goto probe_out_release_mem1;
1909         }
1910
1911         ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, IRQF_DISABLED,
1912                           "vpfe_capture0", vpfe_dev);
1913
1914         if (0 != ret) {
1915                 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1916                 goto probe_out_unmap1;
1917         }
1918
1919         /* Allocate memory for video device */
1920         vfd = video_device_alloc();
1921         if (NULL == vfd) {
1922                 ret = -ENOMEM;
1923                 v4l2_err(pdev->dev.driver,
1924                         "Unable to alloc video device\n");
1925                 goto probe_out_release_irq;
1926         }
1927
1928         /* Initialize field of video device */
1929         vfd->release            = video_device_release;
1930         vfd->fops               = &vpfe_fops;
1931         vfd->ioctl_ops          = &vpfe_ioctl_ops;
1932         vfd->minor              = -1;
1933         vfd->tvnorms            = 0;
1934         vfd->current_norm       = V4L2_STD_PAL;
1935         vfd->v4l2_dev           = &vpfe_dev->v4l2_dev;
1936         snprintf(vfd->name, sizeof(vfd->name),
1937                  "%s_V%d.%d.%d",
1938                  CAPTURE_DRV_NAME,
1939                  (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1940                  (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1941                  (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1942         /* Set video_dev to the video device */
1943         vpfe_dev->video_dev     = vfd;
1944
1945         ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1946         if (ret) {
1947                 v4l2_err(pdev->dev.driver,
1948                         "Unable to register v4l2 device.\n");
1949                 goto probe_out_video_release;
1950         }
1951         v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1952         spin_lock_init(&vpfe_dev->irqlock);
1953         spin_lock_init(&vpfe_dev->dma_queue_lock);
1954         mutex_init(&vpfe_dev->lock);
1955
1956         /* Initialize field of the device objects */
1957         vpfe_dev->numbuffers = config_params.numbuffers;
1958
1959         /* Initialize prio member of device object */
1960         v4l2_prio_init(&vpfe_dev->prio);
1961         /* register video device */
1962         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1963                 "trying to register vpfe device.\n");
1964         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1965                 "video_dev=%x\n", (int)&vpfe_dev->video_dev);
1966         vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1967         ret = video_register_device(vpfe_dev->video_dev,
1968                                     VFL_TYPE_GRABBER, -1);
1969
1970         if (ret) {
1971                 v4l2_err(pdev->dev.driver,
1972                         "Unable to register video device.\n");
1973                 goto probe_out_v4l2_unregister;
1974         }
1975
1976         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1977         /* set the driver data in platform device */
1978         platform_set_drvdata(pdev, vpfe_dev);
1979         /* set driver private data */
1980         video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
1981         i2c_adap = i2c_get_adapter(1);
1982         vpfe_cfg = pdev->dev.platform_data;
1983         num_subdevs = vpfe_cfg->num_subdevs;
1984         vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1985                                 GFP_KERNEL);
1986         if (NULL == vpfe_dev->sd) {
1987                 v4l2_err(&vpfe_dev->v4l2_dev,
1988                         "unable to allocate memory for subdevice pointers\n");
1989                 ret = -ENOMEM;
1990                 goto probe_out_video_unregister;
1991         }
1992
1993         for (i = 0; i < num_subdevs; i++) {
1994                 struct v4l2_input *inps;
1995
1996                 sdinfo = &vpfe_cfg->sub_devs[i];
1997
1998                 /* Load up the subdevice */
1999                 vpfe_dev->sd[i] =
2000                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
2001                                                   i2c_adap,
2002                                                   sdinfo->name,
2003                                                   &sdinfo->board_info,
2004                                                   NULL);
2005                 if (vpfe_dev->sd[i]) {
2006                         v4l2_info(&vpfe_dev->v4l2_dev,
2007                                   "v4l2 sub device %s registered\n",
2008                                   sdinfo->name);
2009                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
2010                         /* update tvnorms from the sub devices */
2011                         for (j = 0; j < sdinfo->num_inputs; j++) {
2012                                 inps = &sdinfo->inputs[j];
2013                                 vfd->tvnorms |= inps->std;
2014                         }
2015                 } else {
2016                         v4l2_info(&vpfe_dev->v4l2_dev,
2017                                   "v4l2 sub device %s register fails\n",
2018                                   sdinfo->name);
2019                         goto probe_sd_out;
2020                 }
2021         }
2022
2023         /* set first sub device as current one */
2024         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
2025
2026         /* We have at least one sub device to work with */
2027         mutex_unlock(&ccdc_lock);
2028         return 0;
2029
2030 probe_sd_out:
2031         kfree(vpfe_dev->sd);
2032 probe_out_video_unregister:
2033         video_unregister_device(vpfe_dev->video_dev);
2034 probe_out_v4l2_unregister:
2035         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2036 probe_out_video_release:
2037         if (vpfe_dev->video_dev->minor == -1)
2038                 video_device_release(vpfe_dev->video_dev);
2039 probe_out_release_irq:
2040         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2041 probe_out_unmap1:
2042         iounmap(ccdc_cfg->ccdc_addr);
2043 probe_out_release_mem1:
2044         release_mem_region(res1->start, res1->end - res1->start + 1);
2045 probe_disable_clock:
2046         vpfe_disable_clock(vpfe_dev);
2047         mutex_unlock(&ccdc_lock);
2048         kfree(ccdc_cfg);
2049 probe_free_dev_mem:
2050         kfree(vpfe_dev);
2051         return ret;
2052 }
2053
2054 /*
2055  * vpfe_remove : It un-register device from V4L2 driver
2056  */
2057 static int vpfe_remove(struct platform_device *pdev)
2058 {
2059         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2060         struct resource *res;
2061
2062         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2063
2064         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2065         kfree(vpfe_dev->sd);
2066         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2067         video_unregister_device(vpfe_dev->video_dev);
2068         mutex_lock(&ccdc_lock);
2069         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2070         release_mem_region(res->start, res->end - res->start + 1);
2071         iounmap(ccdc_cfg->ccdc_addr);
2072         mutex_unlock(&ccdc_lock);
2073         vpfe_disable_clock(vpfe_dev);
2074         kfree(vpfe_dev);
2075         kfree(ccdc_cfg);
2076         return 0;
2077 }
2078
2079 static int
2080 vpfe_suspend(struct device *dev)
2081 {
2082         /* add suspend code here later */
2083         return -1;
2084 }
2085
2086 static int
2087 vpfe_resume(struct device *dev)
2088 {
2089         /* add resume code here later */
2090         return -1;
2091 }
2092
2093 static struct dev_pm_ops vpfe_dev_pm_ops = {
2094         .suspend = vpfe_suspend,
2095         .resume = vpfe_resume,
2096 };
2097
2098 static struct platform_driver vpfe_driver = {
2099         .driver = {
2100                 .name = CAPTURE_DRV_NAME,
2101                 .owner = THIS_MODULE,
2102                 .pm = &vpfe_dev_pm_ops,
2103         },
2104         .probe = vpfe_probe,
2105         .remove = __devexit_p(vpfe_remove),
2106 };
2107
2108 static __init int vpfe_init(void)
2109 {
2110         printk(KERN_NOTICE "vpfe_init\n");
2111         /* Register driver to the kernel */
2112         return platform_driver_register(&vpfe_driver);
2113 }
2114
2115 /*
2116  * vpfe_cleanup : This function un-registers device driver
2117  */
2118 static void vpfe_cleanup(void)
2119 {
2120         platform_driver_unregister(&vpfe_driver);
2121 }
2122
2123 module_init(vpfe_init);
2124 module_exit(vpfe_cleanup);