drivers/media/platform/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  * Driver name : VPFE Capture driver
  15  *    VPFE Capture driver allows applications to capture and stream video
  16  *    frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
  17  *    TVP5146 or  Raw Bayer RGB image data from an image sensor
  18  *    such as Microns' MT9T001, MT9T031 etc.
  19  *
  20  *    These SoCs have, in common, a Video Processing Subsystem (VPSS) that
  21  *    consists of a Video Processing Front End (VPFE) for capturing
  22  *    video/raw image data and Video Processing Back End (VPBE) for displaying
  23  *    YUV data through an in-built analog encoder or Digital LCD port. This
  24  *    driver is for capture through VPFE. A typical EVM using these SoCs have
  25  *    following high level configuration.
  26  *
  27  *
  28  *    decoder(TVP5146/          YUV/
  29  *           MT9T001)   -->  Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
  30  *                              data input              |      |
  31  *                                                      V      |
  32  *                                                    SDRAM    |
  33  *                                                             V
  34  *                                                         Image Processor
  35  *                                                             |
  36  *                                                             V
  37  *                                                           SDRAM
  38  *    The data flow happens from a decoder connected to the VPFE over a
  39  *    YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
  40  *    and to the input of VPFE through an optional MUX (if more inputs are
  41  *    to be interfaced on the EVM). The input data is first passed through
  42  *    CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
  43  *    does very little or no processing on YUV data and does pre-process Raw
  44  *    Bayer RGB data through modules such as Defect Pixel Correction (DFC)
  45  *    Color Space Conversion (CSC), data gain/offset etc. After this, data
  46  *    can be written to SDRAM or can be connected to the image processing
  47  *    block such as IPIPE (on DM355 only).
  48  *
  49  *    Features supported
  50  *              - MMAP IO
  51  *              - Capture using TVP5146 over BT.656
  52  *              - support for interfacing decoders using sub device model
  53  *              - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
  54  *                data capture to SDRAM.
  55  *    TODO list
  56  *              - Support multiple REQBUF after open
  57  *              - Support for de-allocating buffers through REQBUF
  58  *              - Support for Raw Bayer RGB capture
  59  *              - Support for chaining Image Processor
  60  *              - Support for static allocation of buffers
  61  *              - Support for USERPTR IO
  62  *              - Support for STREAMON before QBUF
  63  *              - Support for control ioctls
  64  */
  65 #include <linux/module.h>
  66 #include <linux/slab.h>
  67 #include <linux/init.h>
  68 #include <linux/platform_device.h>
  69 #include <linux/interrupt.h>
  70 #include <media/v4l2-common.h>
  71 #include <linux/io.h>
  72 #include <media/davinci/vpfe_capture.h>
  73 #include "ccdc_hw_device.h"
  74
  75 static int debug;
  76 static u32 numbuffers = 3;
  77 static u32 bufsize = (720 * 576 * 2);
  78
  79 module_param(numbuffers, uint, S_IRUGO);
  80 module_param(bufsize, uint, S_IRUGO);
  81 module_param(debug, int, 0644);
  82
  83 MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
  84 MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
  85 MODULE_PARM_DESC(debug, "Debug level 0-1");
  86
  87 MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_AUTHOR("Texas Instruments");
  90
  91 /* standard information */
  92 struct vpfe_standard {
  93         v4l2_std_id std_id;
  94         unsigned int width;
  95         unsigned int height;
  96         struct v4l2_fract pixelaspect;
  97         /* 0 - progressive, 1 - interlaced */
  98         int frame_format;
  99 };
 100
 101 /* ccdc configuration */
 102 struct ccdc_config {
 103         /* This make sure vpfe is probed and ready to go */
 104         int vpfe_probed;
 105         /* name of ccdc device */
 106         char name[32];
 107 };
 108
 109 /* data structures */
 110 static struct vpfe_config_params config_params = {
 111         .min_numbuffers = 3,
 112         .numbuffers = 3,
 113         .min_bufsize = 720 * 480 * 2,
 114         .device_bufsize = 720 * 576 * 2,
 115 };
 116
 117 /* ccdc device registered */
 118 static struct ccdc_hw_device *ccdc_dev;
 119 /* lock for accessing ccdc information */
 120 static DEFINE_MUTEX(ccdc_lock);
 121 /* ccdc configuration */
 122 static struct ccdc_config *ccdc_cfg;
 123
 124 static const struct vpfe_standard vpfe_standards[] = {
 125         {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
 126         {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
 127 };
 128
 129 /* Used when raw Bayer image from ccdc is directly captured to SDRAM */
 130 static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
 131         {
 132                 .fmtdesc = {
 133                         .index = 0,
 134                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 135                         .description = "Bayer GrRBGb 8bit A-Law compr.",
 136                         .pixelformat = V4L2_PIX_FMT_SBGGR8,
 137                 },
 138                 .bpp = 1,
 139         },
 140         {
 141                 .fmtdesc = {
 142                         .index = 1,
 143                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 144                         .description = "Bayer GrRBGb - 16bit",
 145                         .pixelformat = V4L2_PIX_FMT_SBGGR16,
 146                 },
 147                 .bpp = 2,
 148         },
 149         {
 150                 .fmtdesc = {
 151                         .index = 2,
 152                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 153                         .description = "Bayer GrRBGb 8bit DPCM compr.",
 154                         .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
 155                 },
 156                 .bpp = 1,
 157         },
 158         {
 159                 .fmtdesc = {
 160                         .index = 3,
 161                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 162                         .description = "YCbCr 4:2:2 Interleaved UYVY",
 163                         .pixelformat = V4L2_PIX_FMT_UYVY,
 164                 },
 165                 .bpp = 2,
 166         },
 167         {
 168                 .fmtdesc = {
 169                         .index = 4,
 170                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 171                         .description = "YCbCr 4:2:2 Interleaved YUYV",
 172                         .pixelformat = V4L2_PIX_FMT_YUYV,
 173                 },
 174                 .bpp = 2,
 175         },
 176         {
 177                 .fmtdesc = {
 178                         .index = 5,
 179                         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 180                         .description = "Y/CbCr 4:2:0 - Semi planar",
 181                         .pixelformat = V4L2_PIX_FMT_NV12,
 182                 },
 183                 .bpp = 1,
 184         },
 185 };
 186
 187 /*
 188  * vpfe_lookup_pix_format()
 189  * lookup an entry in the vpfe pix format table based on pix_format
 190  */
 191 static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
 192 {
 193         int i;
 194
 195         for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
 196                 if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
 197                         return &vpfe_pix_fmts[i];
 198         }
 199         return NULL;
 200 }
 201
 202 /*
 203  * vpfe_register_ccdc_device. CCDC module calls this to
 204  * register with vpfe capture
 205  */
 206 int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
 207 {
 208         int ret = 0;
 209         printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
 210
 211         BUG_ON(!dev->hw_ops.open);
 212         BUG_ON(!dev->hw_ops.enable);
 213         BUG_ON(!dev->hw_ops.set_hw_if_params);
 214         BUG_ON(!dev->hw_ops.configure);
 215         BUG_ON(!dev->hw_ops.set_buftype);
 216         BUG_ON(!dev->hw_ops.get_buftype);
 217         BUG_ON(!dev->hw_ops.enum_pix);
 218         BUG_ON(!dev->hw_ops.set_frame_format);
 219         BUG_ON(!dev->hw_ops.get_frame_format);
 220         BUG_ON(!dev->hw_ops.get_pixel_format);
 221         BUG_ON(!dev->hw_ops.set_pixel_format);
 222         BUG_ON(!dev->hw_ops.set_image_window);
 223         BUG_ON(!dev->hw_ops.get_image_window);
 224         BUG_ON(!dev->hw_ops.get_line_length);
 225         BUG_ON(!dev->hw_ops.getfid);
 226
 227         mutex_lock(&ccdc_lock);
 228         if (!ccdc_cfg) {
 229                 /*
 230                  * TODO. Will this ever happen? if so, we need to fix it.
 231                  * Proabably we need to add the request to a linked list and
 232                  * walk through it during vpfe probe
 233                  */
 234                 printk(KERN_ERR "vpfe capture not initialized\n");
 235                 ret = -EFAULT;
 236                 goto unlock;
 237         }
 238
 239         if (strcmp(dev->name, ccdc_cfg->name)) {
 240                 /* ignore this ccdc */
 241                 ret = -EINVAL;
 242                 goto unlock;
 243         }
 244
 245         if (ccdc_dev) {
 246                 printk(KERN_ERR "ccdc already registered\n");
 247                 ret = -EINVAL;
 248                 goto unlock;
 249         }
 250
 251         ccdc_dev = dev;
 252 unlock:
 253         mutex_unlock(&ccdc_lock);
 254         return ret;
 255 }
 256 EXPORT_SYMBOL(vpfe_register_ccdc_device);
 257
 258 /*
 259  * vpfe_unregister_ccdc_device. CCDC module calls this to
 260  * unregister with vpfe capture
 261  */
 262 void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
 263 {
 264         if (!dev) {
 265                 printk(KERN_ERR "invalid ccdc device ptr\n");
 266                 return;
 267         }
 268
 269         printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
 270                 dev->name);
 271
 272         if (strcmp(dev->name, ccdc_cfg->name)) {
 273                 /* ignore this ccdc */
 274                 return;
 275         }
 276
 277         mutex_lock(&ccdc_lock);
 278         ccdc_dev = NULL;
 279         mutex_unlock(&ccdc_lock);
 280 }
 281 EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
 282
 283 /*
 284  * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
 285  */
 286 static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
 287                                  struct v4l2_format *f)
 288 {
 289         struct v4l2_rect image_win;
 290         enum ccdc_buftype buf_type;
 291         enum ccdc_frmfmt frm_fmt;
 292
 293         memset(f, 0, sizeof(*f));
 294         f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 295         ccdc_dev->hw_ops.get_image_window(&image_win);
 296         f->fmt.pix.width = image_win.width;
 297         f->fmt.pix.height = image_win.height;
 298         f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
 299         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 300                                 f->fmt.pix.height;
 301         buf_type = ccdc_dev->hw_ops.get_buftype();
 302         f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
 303         frm_fmt = ccdc_dev->hw_ops.get_frame_format();
 304         if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
 305                 f->fmt.pix.field = V4L2_FIELD_NONE;
 306         else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
 307                 if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
 308                         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 309                 else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
 310                         f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
 311                 else {
 312                         v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
 313                         return -EINVAL;
 314                 }
 315         } else {
 316                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
 317                 return -EINVAL;
 318         }
 319         return 0;
 320 }
 321
 322 /*
 323  * vpfe_config_ccdc_image_format()
 324  * For a pix format, configure ccdc to setup the capture
 325  */
 326 static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
 327 {
 328         enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
 329         int ret = 0;
 330
 331         if (ccdc_dev->hw_ops.set_pixel_format(
 332                         vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
 333                 v4l2_err(&vpfe_dev->v4l2_dev,
 334                         "couldn't set pix format in ccdc\n");
 335                 return -EINVAL;
 336         }
 337         /* configure the image window */
 338         ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
 339
 340         switch (vpfe_dev->fmt.fmt.pix.field) {
 341         case V4L2_FIELD_INTERLACED:
 342                 /* do nothing, since it is default */
 343                 ret = ccdc_dev->hw_ops.set_buftype(
 344                                 CCDC_BUFTYPE_FLD_INTERLEAVED);
 345                 break;
 346         case V4L2_FIELD_NONE:
 347                 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
 348                 /* buffer type only applicable for interlaced scan */
 349                 break;
 350         case V4L2_FIELD_SEQ_TB:
 351                 ret = ccdc_dev->hw_ops.set_buftype(
 352                                 CCDC_BUFTYPE_FLD_SEPARATED);
 353                 break;
 354         default:
 355                 return -EINVAL;
 356         }
 357
 358         /* set the frame format */
 359         if (!ret)
 360                 ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
 361         return ret;
 362 }
 363 /*
 364  * vpfe_config_image_format()
 365  * For a given standard, this functions sets up the default
 366  * pix format & crop values in the vpfe device and ccdc.  It first
 367  * starts with defaults based values from the standard table.
 368  * It then checks if sub device supports get_fmt and then override the
 369  * values based on that.Sets crop values to match with scan resolution
 370  * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
 371  * values in ccdc
 372  */
 373 static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
 374                                     v4l2_std_id std_id)
 375 {
 376         struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
 377         struct v4l2_subdev_format fmt = {
 378                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 379         };
 380         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 381         struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
 382         int i, ret;
 383
 384         for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
 385                 if (vpfe_standards[i].std_id & std_id) {
 386                         vpfe_dev->std_info.active_pixels =
 387                                         vpfe_standards[i].width;
 388                         vpfe_dev->std_info.active_lines =
 389                                         vpfe_standards[i].height;
 390                         vpfe_dev->std_info.frame_format =
 391                                         vpfe_standards[i].frame_format;
 392                         vpfe_dev->std_index = i;
 393                         break;
 394                 }
 395         }
 396
 397         if (i ==  ARRAY_SIZE(vpfe_standards)) {
 398                 v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
 399                 return -EINVAL;
 400         }
 401
 402         vpfe_dev->crop.top = 0;
 403         vpfe_dev->crop.left = 0;
 404         vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
 405         vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
 406         pix->width = vpfe_dev->crop.width;
 407         pix->height = vpfe_dev->crop.height;
 408
 409         /* first field and frame format based on standard frame format */
 410         if (vpfe_dev->std_info.frame_format) {
 411                 pix->field = V4L2_FIELD_INTERLACED;
 412                 /* assume V4L2_PIX_FMT_UYVY as default */
 413                 pix->pixelformat = V4L2_PIX_FMT_UYVY;
 414                 v4l2_fill_mbus_format(mbus_fmt, pix,
 415                                 MEDIA_BUS_FMT_YUYV10_2X10);
 416         } else {
 417                 pix->field = V4L2_FIELD_NONE;
 418                 /* assume V4L2_PIX_FMT_SBGGR8 */
 419                 pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
 420                 v4l2_fill_mbus_format(mbus_fmt, pix,
 421                                 MEDIA_BUS_FMT_SBGGR8_1X8);
 422         }
 423
 424         /* if sub device supports get_fmt, override the defaults */
 425         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 426                         sdinfo->grp_id, pad, get_fmt, NULL, &fmt);
 427
 428         if (ret && ret != -ENOIOCTLCMD) {
 429                 v4l2_err(&vpfe_dev->v4l2_dev,
 430                         "error in getting get_fmt from sub device\n");
 431                 return ret;
 432         }
 433         v4l2_fill_pix_format(pix, mbus_fmt);
 434         pix->bytesperline = pix->width * 2;
 435         pix->sizeimage = pix->bytesperline * pix->height;
 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         pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
 444         pix->sizeimage = pix->bytesperline * pix->height;
 445
 446         return 0;
 447 }
 448
 449 static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
 450 {
 451         int ret;
 452
 453         /* set first input of current subdevice as the current input */
 454         vpfe_dev->current_input = 0;
 455
 456         /* set default standard */
 457         vpfe_dev->std_index = 0;
 458
 459         /* Configure the default format information */
 460         ret = vpfe_config_image_format(vpfe_dev,
 461                                 vpfe_standards[vpfe_dev->std_index].std_id);
 462         if (ret)
 463                 return ret;
 464
 465         /* now open the ccdc device to initialize it */
 466         mutex_lock(&ccdc_lock);
 467         if (!ccdc_dev) {
 468                 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
 469                 ret = -ENODEV;
 470                 goto unlock;
 471         }
 472
 473         if (!try_module_get(ccdc_dev->owner)) {
 474                 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
 475                 ret = -ENODEV;
 476                 goto unlock;
 477         }
 478         ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
 479         if (!ret)
 480                 vpfe_dev->initialized = 1;
 481
 482         /* Clear all VPFE/CCDC interrupts */
 483         if (vpfe_dev->cfg->clr_intr)
 484                 vpfe_dev->cfg->clr_intr(-1);
 485
 486 unlock:
 487         mutex_unlock(&ccdc_lock);
 488         return ret;
 489 }
 490
 491 /*
 492  * vpfe_open : It creates object of file handle structure and
 493  * stores it in private_data  member of filepointer
 494  */
 495 static int vpfe_open(struct file *file)
 496 {
 497         struct vpfe_device *vpfe_dev = video_drvdata(file);
 498         struct video_device *vdev = video_devdata(file);
 499         struct vpfe_fh *fh;
 500
 501         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
 502
 503         if (!vpfe_dev->cfg->num_subdevs) {
 504                 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
 505                 return -ENODEV;
 506         }
 507
 508         /* Allocate memory for the file handle object */
 509         fh = kmalloc(sizeof(*fh), GFP_KERNEL);
 510         if (!fh)
 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         v4l2_fh_init(&fh->fh, vdev);
 517         mutex_lock(&vpfe_dev->lock);
 518         /* If decoder is not initialized. initialize it */
 519         if (!vpfe_dev->initialized) {
 520                 if (vpfe_initialize_device(vpfe_dev)) {
 521                         mutex_unlock(&vpfe_dev->lock);
 522                         v4l2_fh_exit(&fh->fh);
 523                         kfree(fh);
 524                         return -ENODEV;
 525                 }
 526         }
 527         /* Increment device usrs counter */
 528         vpfe_dev->usrs++;
 529         /* Set io_allowed member to false */
 530         fh->io_allowed = 0;
 531         v4l2_fh_add(&fh->fh);
 532         mutex_unlock(&vpfe_dev->lock);
 533         return 0;
 534 }
 535
 536 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
 537 {
 538         unsigned long addr;
 539
 540         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
 541                                         struct videobuf_buffer, queue);
 542         list_del(&vpfe_dev->next_frm->queue);
 543         vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
 544         addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
 545
 546         ccdc_dev->hw_ops.setfbaddr(addr);
 547 }
 548
 549 static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
 550 {
 551         unsigned long addr;
 552
 553         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
 554         addr += vpfe_dev->field_off;
 555         ccdc_dev->hw_ops.setfbaddr(addr);
 556 }
 557
 558 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
 559 {
 560         v4l2_get_timestamp(&vpfe_dev->cur_frm->ts);
 561         vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
 562         vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
 563         wake_up_interruptible(&vpfe_dev->cur_frm->done);
 564         vpfe_dev->cur_frm = vpfe_dev->next_frm;
 565 }
 566
 567 /* ISR for VINT0*/
 568 static irqreturn_t vpfe_isr(int irq, void *dev_id)
 569 {
 570         struct vpfe_device *vpfe_dev = dev_id;
 571         enum v4l2_field field;
 572         int fid;
 573
 574         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
 575         field = vpfe_dev->fmt.fmt.pix.field;
 576
 577         /* if streaming not started, don't do anything */
 578         if (!vpfe_dev->started)
 579                 goto clear_intr;
 580
 581         /* only for 6446 this will be applicable */
 582         if (ccdc_dev->hw_ops.reset)
 583                 ccdc_dev->hw_ops.reset();
 584
 585         if (field == V4L2_FIELD_NONE) {
 586                 /* handle progressive frame capture */
 587                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
 588                         "frame format is progressive...\n");
 589                 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 590                         vpfe_process_buffer_complete(vpfe_dev);
 591                 goto clear_intr;
 592         }
 593
 594         /* interlaced or TB capture check which field we are in hardware */
 595         fid = ccdc_dev->hw_ops.getfid();
 596
 597         /* switch the software maintained field id */
 598         vpfe_dev->field_id ^= 1;
 599         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
 600                 fid, vpfe_dev->field_id);
 601         if (fid == vpfe_dev->field_id) {
 602                 /* we are in-sync here,continue */
 603                 if (fid == 0) {
 604                         /*
 605                          * One frame is just being captured. If the next frame
 606                          * is available, release the current frame and move on
 607                          */
 608                         if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 609                                 vpfe_process_buffer_complete(vpfe_dev);
 610                         /*
 611                          * based on whether the two fields are stored
 612                          * interleavely or separately in memory, reconfigure
 613                          * the CCDC memory address
 614                          */
 615                         if (field == V4L2_FIELD_SEQ_TB)
 616                                 vpfe_schedule_bottom_field(vpfe_dev);
 617                         goto clear_intr;
 618                 }
 619                 /*
 620                  * if one field is just being captured configure
 621                  * the next frame get the next frame from the empty
 622                  * queue if no frame is available hold on to the
 623                  * current buffer
 624                  */
 625                 spin_lock(&vpfe_dev->dma_queue_lock);
 626                 if (!list_empty(&vpfe_dev->dma_queue) &&
 627                     vpfe_dev->cur_frm == vpfe_dev->next_frm)
 628                         vpfe_schedule_next_buffer(vpfe_dev);
 629                 spin_unlock(&vpfe_dev->dma_queue_lock);
 630         } else if (fid == 0) {
 631                 /*
 632                  * out of sync. Recover from any hardware out-of-sync.
 633                  * May loose one frame
 634                  */
 635                 vpfe_dev->field_id = fid;
 636         }
 637 clear_intr:
 638         if (vpfe_dev->cfg->clr_intr)
 639                 vpfe_dev->cfg->clr_intr(irq);
 640
 641         return IRQ_HANDLED;
 642 }
 643
 644 /* vdint1_isr - isr handler for VINT1 interrupt */
 645 static irqreturn_t vdint1_isr(int irq, void *dev_id)
 646 {
 647         struct vpfe_device *vpfe_dev = dev_id;
 648
 649         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
 650
 651         /* if streaming not started, don't do anything */
 652         if (!vpfe_dev->started) {
 653                 if (vpfe_dev->cfg->clr_intr)
 654                         vpfe_dev->cfg->clr_intr(irq);
 655                 return IRQ_HANDLED;
 656         }
 657
 658         spin_lock(&vpfe_dev->dma_queue_lock);
 659         if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
 660             !list_empty(&vpfe_dev->dma_queue) &&
 661             vpfe_dev->cur_frm == vpfe_dev->next_frm)
 662                 vpfe_schedule_next_buffer(vpfe_dev);
 663         spin_unlock(&vpfe_dev->dma_queue_lock);
 664
 665         if (vpfe_dev->cfg->clr_intr)
 666                 vpfe_dev->cfg->clr_intr(irq);
 667
 668         return IRQ_HANDLED;
 669 }
 670
 671 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
 672 {
 673         enum ccdc_frmfmt frame_format;
 674
 675         frame_format = ccdc_dev->hw_ops.get_frame_format();
 676         if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
 677                 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
 678 }
 679
 680 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
 681 {
 682         enum ccdc_frmfmt frame_format;
 683
 684         frame_format = ccdc_dev->hw_ops.get_frame_format();
 685         if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
 686                 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
 687                                     0, "vpfe_capture1",
 688                                     vpfe_dev);
 689         }
 690         return 0;
 691 }
 692
 693 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
 694 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
 695 {
 696         vpfe_dev->started = 0;
 697         ccdc_dev->hw_ops.enable(0);
 698         if (ccdc_dev->hw_ops.enable_out_to_sdram)
 699                 ccdc_dev->hw_ops.enable_out_to_sdram(0);
 700 }
 701
 702 /*
 703  * vpfe_release : This function deletes buffer queue, frees the
 704  * buffers and the vpfe file  handle
 705  */
 706 static int vpfe_release(struct file *file)
 707 {
 708         struct vpfe_device *vpfe_dev = video_drvdata(file);
 709         struct vpfe_fh *fh = file->private_data;
 710         struct vpfe_subdev_info *sdinfo;
 711         int ret;
 712
 713         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
 714
 715         /* Get the device lock */
 716         mutex_lock(&vpfe_dev->lock);
 717         /* if this instance is doing IO */
 718         if (fh->io_allowed) {
 719                 if (vpfe_dev->started) {
 720                         sdinfo = vpfe_dev->current_subdev;
 721                         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 722                                                          sdinfo->grp_id,
 723                                                          video, s_stream, 0);
 724                         if (ret && (ret != -ENOIOCTLCMD))
 725                                 v4l2_err(&vpfe_dev->v4l2_dev,
 726                                 "stream off failed in subdev\n");
 727                         vpfe_stop_ccdc_capture(vpfe_dev);
 728                         vpfe_detach_irq(vpfe_dev);
 729                         videobuf_streamoff(&vpfe_dev->buffer_queue);
 730                 }
 731                 vpfe_dev->io_usrs = 0;
 732                 vpfe_dev->numbuffers = config_params.numbuffers;
 733                 videobuf_stop(&vpfe_dev->buffer_queue);
 734                 videobuf_mmap_free(&vpfe_dev->buffer_queue);
 735         }
 736
 737         /* Decrement device usrs counter */
 738         vpfe_dev->usrs--;
 739         v4l2_fh_del(&fh->fh);
 740         v4l2_fh_exit(&fh->fh);
 741         /* If this is the last file handle */
 742         if (!vpfe_dev->usrs) {
 743                 vpfe_dev->initialized = 0;
 744                 if (ccdc_dev->hw_ops.close)
 745                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
 746                 module_put(ccdc_dev->owner);
 747         }
 748         mutex_unlock(&vpfe_dev->lock);
 749         file->private_data = NULL;
 750         /* Free memory allocated to file handle object */
 751         kfree(fh);
 752         return 0;
 753 }
 754
 755 /*
 756  * vpfe_mmap : It is used to map kernel space buffers
 757  * into user spaces
 758  */
 759 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
 760 {
 761         /* Get the device object and file handle object */
 762         struct vpfe_device *vpfe_dev = video_drvdata(file);
 763
 764         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
 765
 766         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
 767 }
 768
 769 /*
 770  * vpfe_poll: It is used for select/poll system call
 771  */
 772 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
 773 {
 774         struct vpfe_device *vpfe_dev = video_drvdata(file);
 775
 776         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
 777
 778         if (vpfe_dev->started)
 779                 return videobuf_poll_stream(file,
 780                                             &vpfe_dev->buffer_queue, wait);
 781         return 0;
 782 }
 783
 784 /* vpfe capture driver file operations */
 785 static const struct v4l2_file_operations vpfe_fops = {
 786         .owner = THIS_MODULE,
 787         .open = vpfe_open,
 788         .release = vpfe_release,
 789         .unlocked_ioctl = video_ioctl2,
 790         .mmap = vpfe_mmap,
 791         .poll = vpfe_poll
 792 };
 793
 794 /*
 795  * vpfe_check_format()
 796  * This function adjust the input pixel format as per hardware
 797  * capabilities and update the same in pixfmt.
 798  * Following algorithm used :-
 799  *
 800  *      If given pixformat is not in the vpfe list of pix formats or not
 801  *      supported by the hardware, current value of pixformat in the device
 802  *      is used
 803  *      If given field is not supported, then current field is used. If field
 804  *      is different from current, then it is matched with that from sub device.
 805  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
 806  *      progressive. Maximum height is clamped to active active lines of scan
 807  *      Minimum width is 32 bytes in memory and width is clamped to active
 808  *      pixels of scan.
 809  *      bytesperline is a multiple of 32.
 810  */
 811 static const struct vpfe_pixel_format *
 812         vpfe_check_format(struct vpfe_device *vpfe_dev,
 813                           struct v4l2_pix_format *pixfmt)
 814 {
 815         u32 min_height = 1, min_width = 32, max_width, max_height;
 816         const struct vpfe_pixel_format *vpfe_pix_fmt;
 817         u32 pix;
 818         int temp, found;
 819
 820         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 821         if (!vpfe_pix_fmt) {
 822                 /*
 823                  * use current pixel format in the vpfe device. We
 824                  * will find this pix format in the table
 825                  */
 826                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 827                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 828         }
 829
 830         /* check if hw supports it */
 831         temp = 0;
 832         found = 0;
 833         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
 834                 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
 835                         found = 1;
 836                         break;
 837                 }
 838                 temp++;
 839         }
 840
 841         if (!found) {
 842                 /* use current pixel format */
 843                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 844                 /*
 845                  * Since this is currently used in the vpfe device, we
 846                  * will find this pix format in the table
 847                  */
 848                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 849         }
 850
 851         /* check what field format is supported */
 852         if (pixfmt->field == V4L2_FIELD_ANY) {
 853                 /* if field is any, use current value as default */
 854                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 855         }
 856
 857         /*
 858          * if field is not same as current field in the vpfe device
 859          * try matching the field with the sub device field
 860          */
 861         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
 862                 /*
 863                  * If field value is not in the supported fields, use current
 864                  * field used in the device as default
 865                  */
 866                 switch (pixfmt->field) {
 867                 case V4L2_FIELD_INTERLACED:
 868                 case V4L2_FIELD_SEQ_TB:
 869                         /* if sub device is supporting progressive, use that */
 870                         if (!vpfe_dev->std_info.frame_format)
 871                                 pixfmt->field = V4L2_FIELD_NONE;
 872                         break;
 873                 case V4L2_FIELD_NONE:
 874                         if (vpfe_dev->std_info.frame_format)
 875                                 pixfmt->field = V4L2_FIELD_INTERLACED;
 876                         break;
 877
 878                 default:
 879                         /* use current field as default */
 880                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 881                         break;
 882                 }
 883         }
 884
 885         /* Now adjust image resolutions supported */
 886         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
 887             pixfmt->field == V4L2_FIELD_SEQ_TB)
 888                 min_height = 2;
 889
 890         max_width = vpfe_dev->std_info.active_pixels;
 891         max_height = vpfe_dev->std_info.active_lines;
 892         min_width /= vpfe_pix_fmt->bpp;
 893
 894         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
 895                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
 896
 897         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
 898         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
 899
 900         /* If interlaced, adjust height to be a multiple of 2 */
 901         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 902                 pixfmt->height &= (~1);
 903         /*
 904          * recalculate bytesperline and sizeimage since width
 905          * and height might have changed
 906          */
 907         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
 908                                 & ~31);
 909         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 910                 pixfmt->sizeimage =
 911                         pixfmt->bytesperline * pixfmt->height +
 912                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
 913         else
 914                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 915
 916         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height = %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
 917                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
 918                  pixfmt->bytesperline, pixfmt->sizeimage);
 919         return vpfe_pix_fmt;
 920 }
 921
 922 static int vpfe_querycap(struct file *file, void  *priv,
 923                                struct v4l2_capability *cap)
 924 {
 925         struct vpfe_device *vpfe_dev = video_drvdata(file);
 926
 927         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
 928
 929         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 930         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 931         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 932         strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
 933         strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
 934         return 0;
 935 }
 936
 937 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
 938                                 struct v4l2_format *fmt)
 939 {
 940         struct vpfe_device *vpfe_dev = video_drvdata(file);
 941
 942         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
 943         /* Fill in the information about format */
 944         *fmt = vpfe_dev->fmt;
 945         return 0;
 946 }
 947
 948 static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
 949                                    struct v4l2_fmtdesc *fmt)
 950 {
 951         struct vpfe_device *vpfe_dev = video_drvdata(file);
 952         const struct vpfe_pixel_format *pix_fmt;
 953         int temp_index;
 954         u32 pix;
 955
 956         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
 957
 958         if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
 959                 return -EINVAL;
 960
 961         /* Fill in the information about format */
 962         pix_fmt = vpfe_lookup_pix_format(pix);
 963         if (pix_fmt) {
 964                 temp_index = fmt->index;
 965                 *fmt = pix_fmt->fmtdesc;
 966                 fmt->index = temp_index;
 967                 return 0;
 968         }
 969         return -EINVAL;
 970 }
 971
 972 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
 973                                 struct v4l2_format *fmt)
 974 {
 975         struct vpfe_device *vpfe_dev = video_drvdata(file);
 976         const struct vpfe_pixel_format *pix_fmts;
 977         int ret;
 978
 979         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
 980
 981         /* If streaming is started, return error */
 982         if (vpfe_dev->started) {
 983                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
 984                 return -EBUSY;
 985         }
 986
 987         /* Check for valid frame format */
 988         pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
 989         if (!pix_fmts)
 990                 return -EINVAL;
 991
 992         /* store the pixel format in the device  object */
 993         ret = mutex_lock_interruptible(&vpfe_dev->lock);
 994         if (ret)
 995                 return ret;
 996
 997         /* First detach any IRQ if currently attached */
 998         vpfe_detach_irq(vpfe_dev);
 999         vpfe_dev->fmt = *fmt;
1000         /* set image capture parameters in the ccdc */
1001         ret = vpfe_config_ccdc_image_format(vpfe_dev);
1002         mutex_unlock(&vpfe_dev->lock);
1003         return ret;
1004 }
1005
1006 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1007                                   struct v4l2_format *f)
1008 {
1009         struct vpfe_device *vpfe_dev = video_drvdata(file);
1010         const struct vpfe_pixel_format *pix_fmts;
1011
1012         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1013
1014         pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1015         if (!pix_fmts)
1016                 return -EINVAL;
1017         return 0;
1018 }
1019
1020 /*
1021  * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1022  * given app input index
1023  */
1024 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1025                                         int *subdev_index,
1026                                         int *subdev_input_index,
1027                                         int app_input_index)
1028 {
1029         struct vpfe_config *cfg = vpfe_dev->cfg;
1030         struct vpfe_subdev_info *sdinfo;
1031         int i, j = 0;
1032
1033         for (i = 0; i < cfg->num_subdevs; i++) {
1034                 sdinfo = &cfg->sub_devs[i];
1035                 if (app_input_index < (j + sdinfo->num_inputs)) {
1036                         *subdev_index = i;
1037                         *subdev_input_index = app_input_index - j;
1038                         return 0;
1039                 }
1040                 j += sdinfo->num_inputs;
1041         }
1042         return -EINVAL;
1043 }
1044
1045 /*
1046  * vpfe_get_app_input - Get app input index for a given subdev input index
1047  * driver stores the input index of the current sub device and translate it
1048  * when application request the current input
1049  */
1050 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1051                                     int *app_input_index)
1052 {
1053         struct vpfe_config *cfg = vpfe_dev->cfg;
1054         struct vpfe_subdev_info *sdinfo;
1055         int i, j = 0;
1056
1057         for (i = 0; i < cfg->num_subdevs; i++) {
1058                 sdinfo = &cfg->sub_devs[i];
1059                 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1060                         if (vpfe_dev->current_input >= sdinfo->num_inputs)
1061                                 return -1;
1062                         *app_input_index = j + vpfe_dev->current_input;
1063                         return 0;
1064                 }
1065                 j += sdinfo->num_inputs;
1066         }
1067         return -EINVAL;
1068 }
1069
1070 static int vpfe_enum_input(struct file *file, void *priv,
1071                                  struct v4l2_input *inp)
1072 {
1073         struct vpfe_device *vpfe_dev = video_drvdata(file);
1074         struct vpfe_subdev_info *sdinfo;
1075         int subdev, index ;
1076
1077         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1078
1079         if (vpfe_get_subdev_input_index(vpfe_dev,
1080                                         &subdev,
1081                                         &index,
1082                                         inp->index) < 0) {
1083                 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found for the subdev\n");
1084                 return -EINVAL;
1085         }
1086         sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1087         *inp = sdinfo->inputs[index];
1088         return 0;
1089 }
1090
1091 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1092 {
1093         struct vpfe_device *vpfe_dev = video_drvdata(file);
1094
1095         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1096
1097         return vpfe_get_app_input_index(vpfe_dev, index);
1098 }
1099
1100
1101 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1102 {
1103         struct vpfe_device *vpfe_dev = video_drvdata(file);
1104         struct v4l2_subdev *sd;
1105         struct vpfe_subdev_info *sdinfo;
1106         int subdev_index, inp_index;
1107         struct vpfe_route *route;
1108         u32 input, output;
1109         int ret;
1110
1111         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1112
1113         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1114         if (ret)
1115                 return ret;
1116
1117         /*
1118          * If streaming is started return device busy
1119          * error
1120          */
1121         if (vpfe_dev->started) {
1122                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1123                 ret = -EBUSY;
1124                 goto unlock_out;
1125         }
1126         ret = vpfe_get_subdev_input_index(vpfe_dev,
1127                                           &subdev_index,
1128                                           &inp_index,
1129                                           index);
1130         if (ret < 0) {
1131                 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1132                 goto unlock_out;
1133         }
1134
1135         sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1136         sd = vpfe_dev->sd[subdev_index];
1137         route = &sdinfo->routes[inp_index];
1138         if (route && sdinfo->can_route) {
1139                 input = route->input;
1140                 output = route->output;
1141         } else {
1142                 input = 0;
1143                 output = 0;
1144         }
1145
1146         if (sd)
1147                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1148
1149         if (ret) {
1150                 v4l2_err(&vpfe_dev->v4l2_dev,
1151                         "vpfe_doioctl:error in setting input in decoder\n");
1152                 ret = -EINVAL;
1153                 goto unlock_out;
1154         }
1155         vpfe_dev->current_subdev = sdinfo;
1156         if (sd)
1157                 vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1158         vpfe_dev->current_input = index;
1159         vpfe_dev->std_index = 0;
1160
1161         /* set the bus/interface parameter for the sub device in ccdc */
1162         ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1163         if (ret)
1164                 goto unlock_out;
1165
1166         /* set the default image parameters in the device */
1167         ret = vpfe_config_image_format(vpfe_dev,
1168                                 vpfe_standards[vpfe_dev->std_index].std_id);
1169 unlock_out:
1170         mutex_unlock(&vpfe_dev->lock);
1171         return ret;
1172 }
1173
1174 static int vpfe_querystd(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;
1179
1180         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1181
1182         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1183         sdinfo = vpfe_dev->current_subdev;
1184         if (ret)
1185                 return ret;
1186         /* Call querystd function of decoder device */
1187         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1188                                          video, querystd, std_id);
1189         mutex_unlock(&vpfe_dev->lock);
1190         return ret;
1191 }
1192
1193 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1194 {
1195         struct vpfe_device *vpfe_dev = video_drvdata(file);
1196         struct vpfe_subdev_info *sdinfo;
1197         int ret;
1198
1199         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1200
1201         /* Call decoder driver function to set the standard */
1202         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1203         if (ret)
1204                 return ret;
1205
1206         sdinfo = vpfe_dev->current_subdev;
1207         /* If streaming is started, return device busy error */
1208         if (vpfe_dev->started) {
1209                 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1210                 ret = -EBUSY;
1211                 goto unlock_out;
1212         }
1213
1214         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1215                                          video, s_std, std_id);
1216         if (ret < 0) {
1217                 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1218                 goto unlock_out;
1219         }
1220         ret = vpfe_config_image_format(vpfe_dev, std_id);
1221
1222 unlock_out:
1223         mutex_unlock(&vpfe_dev->lock);
1224         return ret;
1225 }
1226
1227 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1228 {
1229         struct vpfe_device *vpfe_dev = video_drvdata(file);
1230
1231         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1232
1233         *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1234         return 0;
1235 }
1236 /*
1237  *  Videobuf operations
1238  */
1239 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1240                                 unsigned int *count,
1241                                 unsigned int *size)
1242 {
1243         struct vpfe_fh *fh = vq->priv_data;
1244         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1245
1246         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1247         *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1248         if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1249                 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1250                 *size = config_params.device_bufsize;
1251
1252         if (*count < config_params.min_numbuffers)
1253                 *count = config_params.min_numbuffers;
1254         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1255                 "count=%d, size=%d\n", *count, *size);
1256         return 0;
1257 }
1258
1259 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1260                                 struct videobuf_buffer *vb,
1261                                 enum v4l2_field field)
1262 {
1263         struct vpfe_fh *fh = vq->priv_data;
1264         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1265         unsigned long addr;
1266         int ret;
1267
1268         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1269
1270         /* If buffer is not initialized, initialize it */
1271         if (VIDEOBUF_NEEDS_INIT == vb->state) {
1272                 vb->width = vpfe_dev->fmt.fmt.pix.width;
1273                 vb->height = vpfe_dev->fmt.fmt.pix.height;
1274                 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1275                 vb->field = field;
1276
1277                 ret = videobuf_iolock(vq, vb, NULL);
1278                 if (ret < 0)
1279                         return ret;
1280
1281                 addr = videobuf_to_dma_contig(vb);
1282                 /* Make sure user addresses are aligned to 32 bytes */
1283                 if (!ALIGN(addr, 32))
1284                         return -EINVAL;
1285
1286                 vb->state = VIDEOBUF_PREPARED;
1287         }
1288         return 0;
1289 }
1290
1291 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1292                                 struct videobuf_buffer *vb)
1293 {
1294         /* Get the file handle object and device object */
1295         struct vpfe_fh *fh = vq->priv_data;
1296         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1297         unsigned long flags;
1298
1299         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1300
1301         /* add the buffer to the DMA queue */
1302         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1303         list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1304         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1305
1306         /* Change state of the buffer */
1307         vb->state = VIDEOBUF_QUEUED;
1308 }
1309
1310 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1311                                   struct videobuf_buffer *vb)
1312 {
1313         struct vpfe_fh *fh = vq->priv_data;
1314         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1315         unsigned long flags;
1316
1317         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1318
1319         /*
1320          * We need to flush the buffer from the dma queue since
1321          * they are de-allocated
1322          */
1323         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1324         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1325         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1326         videobuf_dma_contig_free(vq, vb);
1327         vb->state = VIDEOBUF_NEEDS_INIT;
1328 }
1329
1330 static struct videobuf_queue_ops vpfe_videobuf_qops = {
1331         .buf_setup      = vpfe_videobuf_setup,
1332         .buf_prepare    = vpfe_videobuf_prepare,
1333         .buf_queue      = vpfe_videobuf_queue,
1334         .buf_release    = vpfe_videobuf_release,
1335 };
1336
1337 /*
1338  * vpfe_reqbufs. currently support REQBUF only once opening
1339  * the device.
1340  */
1341 static int vpfe_reqbufs(struct file *file, void *priv,
1342                         struct v4l2_requestbuffers *req_buf)
1343 {
1344         struct vpfe_device *vpfe_dev = video_drvdata(file);
1345         struct vpfe_fh *fh = file->private_data;
1346         int ret;
1347
1348         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1349
1350         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1351                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1352                 return -EINVAL;
1353         }
1354
1355         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1356         if (ret)
1357                 return ret;
1358
1359         if (vpfe_dev->io_usrs != 0) {
1360                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1361                 ret = -EBUSY;
1362                 goto unlock_out;
1363         }
1364
1365         vpfe_dev->memory = req_buf->memory;
1366         videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1367                                 &vpfe_videobuf_qops,
1368                                 vpfe_dev->pdev,
1369                                 &vpfe_dev->irqlock,
1370                                 req_buf->type,
1371                                 vpfe_dev->fmt.fmt.pix.field,
1372                                 sizeof(struct videobuf_buffer),
1373                                 fh, NULL);
1374
1375         fh->io_allowed = 1;
1376         vpfe_dev->io_usrs = 1;
1377         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1378         ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1379 unlock_out:
1380         mutex_unlock(&vpfe_dev->lock);
1381         return ret;
1382 }
1383
1384 static int vpfe_querybuf(struct file *file, void *priv,
1385                          struct v4l2_buffer *buf)
1386 {
1387         struct vpfe_device *vpfe_dev = video_drvdata(file);
1388
1389         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1390
1391         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1392                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1393                 return  -EINVAL;
1394         }
1395
1396         if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1397                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1398                 return -EINVAL;
1399         }
1400         /* Call videobuf_querybuf to get information */
1401         return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1402 }
1403
1404 static int vpfe_qbuf(struct file *file, void *priv,
1405                      struct v4l2_buffer *p)
1406 {
1407         struct vpfe_device *vpfe_dev = video_drvdata(file);
1408         struct vpfe_fh *fh = file->private_data;
1409
1410         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1411
1412         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1413                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1414                 return -EINVAL;
1415         }
1416
1417         /*
1418          * If this file handle is not allowed to do IO,
1419          * return error
1420          */
1421         if (!fh->io_allowed) {
1422                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1423                 return -EACCES;
1424         }
1425         return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1426 }
1427
1428 static int vpfe_dqbuf(struct file *file, void *priv,
1429                       struct v4l2_buffer *buf)
1430 {
1431         struct vpfe_device *vpfe_dev = video_drvdata(file);
1432
1433         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1434
1435         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1436                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1437                 return -EINVAL;
1438         }
1439         return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1440                                       buf, file->f_flags & O_NONBLOCK);
1441 }
1442
1443 /*
1444  * vpfe_calculate_offsets : This function calculates buffers offset
1445  * for top and bottom field
1446  */
1447 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1448 {
1449         struct v4l2_rect image_win;
1450
1451         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1452
1453         ccdc_dev->hw_ops.get_image_window(&image_win);
1454         vpfe_dev->field_off = image_win.height * image_win.width;
1455 }
1456
1457 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1458 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1459 {
1460         ccdc_dev->hw_ops.enable(1);
1461         if (ccdc_dev->hw_ops.enable_out_to_sdram)
1462                 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1463         vpfe_dev->started = 1;
1464 }
1465
1466 /*
1467  * vpfe_streamon. Assume the DMA queue is not empty.
1468  * application is expected to call QBUF before calling
1469  * this ioctl. If not, driver returns error
1470  */
1471 static int vpfe_streamon(struct file *file, void *priv,
1472                          enum v4l2_buf_type buf_type)
1473 {
1474         struct vpfe_device *vpfe_dev = video_drvdata(file);
1475         struct vpfe_fh *fh = file->private_data;
1476         struct vpfe_subdev_info *sdinfo;
1477         unsigned long addr;
1478         int ret;
1479
1480         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1481
1482         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1483                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1484                 return -EINVAL;
1485         }
1486
1487         /* If file handle is not allowed IO, return error */
1488         if (!fh->io_allowed) {
1489                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1490                 return -EACCES;
1491         }
1492
1493         sdinfo = vpfe_dev->current_subdev;
1494         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1495                                         video, s_stream, 1);
1496
1497         if (ret && (ret != -ENOIOCTLCMD)) {
1498                 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1499                 return -EINVAL;
1500         }
1501
1502         /* If buffer queue is empty, return error */
1503         if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1504                 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1505                 return -EIO;
1506         }
1507
1508         /* Call videobuf_streamon to start streaming * in videobuf */
1509         ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1510         if (ret)
1511                 return ret;
1512
1513
1514         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1515         if (ret)
1516                 goto streamoff;
1517         /* Get the next frame from the buffer queue */
1518         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1519                                         struct videobuf_buffer, queue);
1520         vpfe_dev->cur_frm = vpfe_dev->next_frm;
1521         /* Remove buffer from the buffer queue */
1522         list_del(&vpfe_dev->cur_frm->queue);
1523         /* Mark state of the current frame to active */
1524         vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1525         /* Initialize field_id and started member */
1526         vpfe_dev->field_id = 0;
1527         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1528
1529         /* Calculate field offset */
1530         vpfe_calculate_offsets(vpfe_dev);
1531
1532         if (vpfe_attach_irq(vpfe_dev) < 0) {
1533                 v4l2_err(&vpfe_dev->v4l2_dev,
1534                          "Error in attaching interrupt handle\n");
1535                 ret = -EFAULT;
1536                 goto unlock_out;
1537         }
1538         if (ccdc_dev->hw_ops.configure() < 0) {
1539                 v4l2_err(&vpfe_dev->v4l2_dev,
1540                          "Error in configuring ccdc\n");
1541                 ret = -EINVAL;
1542                 goto unlock_out;
1543         }
1544         ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1545         vpfe_start_ccdc_capture(vpfe_dev);
1546         mutex_unlock(&vpfe_dev->lock);
1547         return ret;
1548 unlock_out:
1549         mutex_unlock(&vpfe_dev->lock);
1550 streamoff:
1551         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1552         return ret;
1553 }
1554
1555 static int vpfe_streamoff(struct file *file, void *priv,
1556                           enum v4l2_buf_type buf_type)
1557 {
1558         struct vpfe_device *vpfe_dev = video_drvdata(file);
1559         struct vpfe_fh *fh = file->private_data;
1560         struct vpfe_subdev_info *sdinfo;
1561         int ret;
1562
1563         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1564
1565         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1566                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1567                 return -EINVAL;
1568         }
1569
1570         /* If io is allowed for this file handle, return error */
1571         if (!fh->io_allowed) {
1572                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1573                 return -EACCES;
1574         }
1575
1576         /* If streaming is not started, return error */
1577         if (!vpfe_dev->started) {
1578                 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1579                 return -EINVAL;
1580         }
1581
1582         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1583         if (ret)
1584                 return ret;
1585
1586         vpfe_stop_ccdc_capture(vpfe_dev);
1587         vpfe_detach_irq(vpfe_dev);
1588
1589         sdinfo = vpfe_dev->current_subdev;
1590         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1591                                         video, s_stream, 0);
1592
1593         if (ret && (ret != -ENOIOCTLCMD))
1594                 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1595         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1596         mutex_unlock(&vpfe_dev->lock);
1597         return ret;
1598 }
1599
1600 static int vpfe_cropcap(struct file *file, void *priv,
1601                               struct v4l2_cropcap *crop)
1602 {
1603         struct vpfe_device *vpfe_dev = video_drvdata(file);
1604
1605         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1606
1607         if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1608                 return -EINVAL;
1609         /* If std_index is invalid, then just return (== 1:1 aspect) */
1610         if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1611                 return 0;
1612
1613         crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1614         return 0;
1615 }
1616
1617 static int vpfe_g_selection(struct file *file, void *priv,
1618                             struct v4l2_selection *sel)
1619 {
1620         struct vpfe_device *vpfe_dev = video_drvdata(file);
1621
1622         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_selection\n");
1623
1624         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1625                 return -EINVAL;
1626
1627         switch (sel->target) {
1628         case V4L2_SEL_TGT_CROP:
1629                 sel->r = vpfe_dev->crop;
1630                 break;
1631         case V4L2_SEL_TGT_CROP_DEFAULT:
1632         case V4L2_SEL_TGT_CROP_BOUNDS:
1633                 sel->r.width = vpfe_standards[vpfe_dev->std_index].width;
1634                 sel->r.height = vpfe_standards[vpfe_dev->std_index].height;
1635                 break;
1636         default:
1637                 return -EINVAL;
1638         }
1639         return 0;
1640 }
1641
1642 static int vpfe_s_selection(struct file *file, void *priv,
1643                             struct v4l2_selection *sel)
1644 {
1645         struct vpfe_device *vpfe_dev = video_drvdata(file);
1646         struct v4l2_rect rect = sel->r;
1647         int ret;
1648
1649         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_selection\n");
1650
1651         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1652             sel->target != V4L2_SEL_TGT_CROP)
1653                 return -EINVAL;
1654
1655         if (vpfe_dev->started) {
1656                 /* make sure streaming is not started */
1657                 v4l2_err(&vpfe_dev->v4l2_dev,
1658                         "Cannot change crop when streaming is ON\n");
1659                 return -EBUSY;
1660         }
1661
1662         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1663         if (ret)
1664                 return ret;
1665
1666         if (rect.top < 0 || rect.left < 0) {
1667                 v4l2_err(&vpfe_dev->v4l2_dev,
1668                         "doesn't support negative values for top & left\n");
1669                 ret = -EINVAL;
1670                 goto unlock_out;
1671         }
1672
1673         /* adjust the width to 16 pixel boundary */
1674         rect.width = ((rect.width + 15) & ~0xf);
1675
1676         /* make sure parameters are valid */
1677         if ((rect.left + rect.width >
1678                 vpfe_dev->std_info.active_pixels) ||
1679             (rect.top + rect.height >
1680                 vpfe_dev->std_info.active_lines)) {
1681                 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_SELECTION params\n");
1682                 ret = -EINVAL;
1683                 goto unlock_out;
1684         }
1685         ccdc_dev->hw_ops.set_image_window(&rect);
1686         vpfe_dev->fmt.fmt.pix.width = rect.width;
1687         vpfe_dev->fmt.fmt.pix.height = rect.height;
1688         vpfe_dev->fmt.fmt.pix.bytesperline =
1689                 ccdc_dev->hw_ops.get_line_length();
1690         vpfe_dev->fmt.fmt.pix.sizeimage =
1691                 vpfe_dev->fmt.fmt.pix.bytesperline *
1692                 vpfe_dev->fmt.fmt.pix.height;
1693         vpfe_dev->crop = rect;
1694         sel->r = rect;
1695 unlock_out:
1696         mutex_unlock(&vpfe_dev->lock);
1697         return ret;
1698 }
1699
1700
1701 static long vpfe_param_handler(struct file *file, void *priv,
1702                 bool valid_prio, unsigned int cmd, void *param)
1703 {
1704         struct vpfe_device *vpfe_dev = video_drvdata(file);
1705         int ret;
1706
1707         v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1708
1709         if (vpfe_dev->started) {
1710                 /* only allowed if streaming is not started */
1711                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1712                         "device already started\n");
1713                 return -EBUSY;
1714         }
1715
1716         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1717         if (ret)
1718                 return ret;
1719
1720         switch (cmd) {
1721         case VPFE_CMD_S_CCDC_RAW_PARAMS:
1722                 v4l2_warn(&vpfe_dev->v4l2_dev,
1723                           "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1724                 if (ccdc_dev->hw_ops.set_params) {
1725                         ret = ccdc_dev->hw_ops.set_params(param);
1726                         if (ret) {
1727                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1728                                         "Error setting parameters in CCDC\n");
1729                                 goto unlock_out;
1730                         }
1731                         ret = vpfe_get_ccdc_image_format(vpfe_dev,
1732                                                          &vpfe_dev->fmt);
1733                         if (ret < 0) {
1734                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1735                                         "Invalid image format at CCDC\n");
1736                                 goto unlock_out;
1737                         }
1738                 } else {
1739                         ret = -EINVAL;
1740                         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1741                                 "VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1742                 }
1743                 break;
1744         default:
1745                 ret = -ENOTTY;
1746         }
1747 unlock_out:
1748         mutex_unlock(&vpfe_dev->lock);
1749         return ret;
1750 }
1751
1752
1753 /* vpfe capture ioctl operations */
1754 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1755         .vidioc_querycap         = vpfe_querycap,
1756         .vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1757         .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1758         .vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1759         .vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1760         .vidioc_enum_input       = vpfe_enum_input,
1761         .vidioc_g_input          = vpfe_g_input,
1762         .vidioc_s_input          = vpfe_s_input,
1763         .vidioc_querystd         = vpfe_querystd,
1764         .vidioc_s_std            = vpfe_s_std,
1765         .vidioc_g_std            = vpfe_g_std,
1766         .vidioc_reqbufs          = vpfe_reqbufs,
1767         .vidioc_querybuf         = vpfe_querybuf,
1768         .vidioc_qbuf             = vpfe_qbuf,
1769         .vidioc_dqbuf            = vpfe_dqbuf,
1770         .vidioc_streamon         = vpfe_streamon,
1771         .vidioc_streamoff        = vpfe_streamoff,
1772         .vidioc_cropcap          = vpfe_cropcap,
1773         .vidioc_g_selection      = vpfe_g_selection,
1774         .vidioc_s_selection      = vpfe_s_selection,
1775         .vidioc_default          = vpfe_param_handler,
1776 };
1777
1778 static struct vpfe_device *vpfe_initialize(void)
1779 {
1780         struct vpfe_device *vpfe_dev;
1781
1782         /* Default number of buffers should be 3 */
1783         if ((numbuffers > 0) &&
1784             (numbuffers < config_params.min_numbuffers))
1785                 numbuffers = config_params.min_numbuffers;
1786
1787         /*
1788          * Set buffer size to min buffers size if invalid buffer size is
1789          * given
1790          */
1791         if (bufsize < config_params.min_bufsize)
1792                 bufsize = config_params.min_bufsize;
1793
1794         config_params.numbuffers = numbuffers;
1795
1796         if (numbuffers)
1797                 config_params.device_bufsize = bufsize;
1798
1799         /* Allocate memory for device objects */
1800         vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1801
1802         return vpfe_dev;
1803 }
1804
1805 /*
1806  * vpfe_probe : This function creates device entries by register
1807  * itself to the V4L2 driver and initializes fields of each
1808  * device objects
1809  */
1810 static int vpfe_probe(struct platform_device *pdev)
1811 {
1812         struct vpfe_subdev_info *sdinfo;
1813         struct vpfe_config *vpfe_cfg;
1814         struct resource *res1;
1815         struct vpfe_device *vpfe_dev;
1816         struct i2c_adapter *i2c_adap;
1817         struct video_device *vfd;
1818         int ret, i, j;
1819         int num_subdevs = 0;
1820
1821         /* Get the pointer to the device object */
1822         vpfe_dev = vpfe_initialize();
1823
1824         if (!vpfe_dev) {
1825                 v4l2_err(pdev->dev.driver,
1826                         "Failed to allocate memory for vpfe_dev\n");
1827                 return -ENOMEM;
1828         }
1829
1830         vpfe_dev->pdev = &pdev->dev;
1831
1832         if (!pdev->dev.platform_data) {
1833                 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1834                 ret = -ENODEV;
1835                 goto probe_free_dev_mem;
1836         }
1837
1838         vpfe_cfg = pdev->dev.platform_data;
1839         vpfe_dev->cfg = vpfe_cfg;
1840         if (!vpfe_cfg->ccdc || !vpfe_cfg->card_name || !vpfe_cfg->sub_devs) {
1841                 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1842                 ret = -ENOENT;
1843                 goto probe_free_dev_mem;
1844         }
1845
1846         /* Allocate memory for ccdc configuration */
1847         ccdc_cfg = kmalloc(sizeof(*ccdc_cfg), GFP_KERNEL);
1848         if (!ccdc_cfg) {
1849                 ret = -ENOMEM;
1850                 goto probe_free_dev_mem;
1851         }
1852
1853         mutex_lock(&ccdc_lock);
1854
1855         strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1856         /* Get VINT0 irq resource */
1857         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1858         if (!res1) {
1859                 v4l2_err(pdev->dev.driver,
1860                          "Unable to get interrupt for VINT0\n");
1861                 ret = -ENODEV;
1862                 goto probe_free_ccdc_cfg_mem;
1863         }
1864         vpfe_dev->ccdc_irq0 = res1->start;
1865
1866         /* Get VINT1 irq resource */
1867         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1868         if (!res1) {
1869                 v4l2_err(pdev->dev.driver,
1870                          "Unable to get interrupt for VINT1\n");
1871                 ret = -ENODEV;
1872                 goto probe_free_ccdc_cfg_mem;
1873         }
1874         vpfe_dev->ccdc_irq1 = res1->start;
1875
1876         ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1877                           "vpfe_capture0", vpfe_dev);
1878
1879         if (0 != ret) {
1880                 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1881                 goto probe_free_ccdc_cfg_mem;
1882         }
1883
1884         vfd = &vpfe_dev->video_dev;
1885         /* Initialize field of video device */
1886         vfd->release            = video_device_release_empty;
1887         vfd->fops               = &vpfe_fops;
1888         vfd->ioctl_ops          = &vpfe_ioctl_ops;
1889         vfd->tvnorms            = 0;
1890         vfd->v4l2_dev           = &vpfe_dev->v4l2_dev;
1891         snprintf(vfd->name, sizeof(vfd->name),
1892                  "%s_V%d.%d.%d",
1893                  CAPTURE_DRV_NAME,
1894                  (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1895                  (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1896                  (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1897
1898         ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1899         if (ret) {
1900                 v4l2_err(pdev->dev.driver,
1901                         "Unable to register v4l2 device.\n");
1902                 goto probe_out_release_irq;
1903         }
1904         v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1905         spin_lock_init(&vpfe_dev->irqlock);
1906         spin_lock_init(&vpfe_dev->dma_queue_lock);
1907         mutex_init(&vpfe_dev->lock);
1908
1909         /* Initialize field of the device objects */
1910         vpfe_dev->numbuffers = config_params.numbuffers;
1911
1912         /* register video device */
1913         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1914                 "trying to register vpfe device.\n");
1915         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1916                 "video_dev=%p\n", &vpfe_dev->video_dev);
1917         vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1918         ret = video_register_device(&vpfe_dev->video_dev,
1919                                     VFL_TYPE_GRABBER, -1);
1920
1921         if (ret) {
1922                 v4l2_err(pdev->dev.driver,
1923                         "Unable to register video device.\n");
1924                 goto probe_out_v4l2_unregister;
1925         }
1926
1927         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1928         /* set the driver data in platform device */
1929         platform_set_drvdata(pdev, vpfe_dev);
1930         /* set driver private data */
1931         video_set_drvdata(&vpfe_dev->video_dev, vpfe_dev);
1932         i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1933         num_subdevs = vpfe_cfg->num_subdevs;
1934         vpfe_dev->sd = kmalloc_array(num_subdevs,
1935                                      sizeof(*vpfe_dev->sd),
1936                                      GFP_KERNEL);
1937         if (!vpfe_dev->sd) {
1938                 ret = -ENOMEM;
1939                 goto probe_out_video_unregister;
1940         }
1941
1942         for (i = 0; i < num_subdevs; i++) {
1943                 struct v4l2_input *inps;
1944
1945                 sdinfo = &vpfe_cfg->sub_devs[i];
1946
1947                 /* Load up the subdevice */
1948                 vpfe_dev->sd[i] =
1949                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1950                                                   i2c_adap,
1951                                                   &sdinfo->board_info,
1952                                                   NULL);
1953                 if (vpfe_dev->sd[i]) {
1954                         v4l2_info(&vpfe_dev->v4l2_dev,
1955                                   "v4l2 sub device %s registered\n",
1956                                   sdinfo->name);
1957                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1958                         /* update tvnorms from the sub devices */
1959                         for (j = 0; j < sdinfo->num_inputs; j++) {
1960                                 inps = &sdinfo->inputs[j];
1961                                 vfd->tvnorms |= inps->std;
1962                         }
1963                 } else {
1964                         v4l2_info(&vpfe_dev->v4l2_dev,
1965                                   "v4l2 sub device %s register fails\n",
1966                                   sdinfo->name);
1967                         ret = -ENXIO;
1968                         goto probe_sd_out;
1969                 }
1970         }
1971
1972         /* set first sub device as current one */
1973         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1974         vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1975
1976         /* We have at least one sub device to work with */
1977         mutex_unlock(&ccdc_lock);
1978         return 0;
1979
1980 probe_sd_out:
1981         kfree(vpfe_dev->sd);
1982 probe_out_video_unregister:
1983         video_unregister_device(&vpfe_dev->video_dev);
1984 probe_out_v4l2_unregister:
1985         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1986 probe_out_release_irq:
1987         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1988 probe_free_ccdc_cfg_mem:
1989         kfree(ccdc_cfg);
1990         mutex_unlock(&ccdc_lock);
1991 probe_free_dev_mem:
1992         kfree(vpfe_dev);
1993         return ret;
1994 }
1995
1996 /*
1997  * vpfe_remove : It un-register device from V4L2 driver
1998  */
1999 static int vpfe_remove(struct platform_device *pdev)
2000 {
2001         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2002
2003         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2004
2005         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2006         kfree(vpfe_dev->sd);
2007         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2008         video_unregister_device(&vpfe_dev->video_dev);
2009         kfree(vpfe_dev);
2010         kfree(ccdc_cfg);
2011         return 0;
2012 }
2013
2014 static int vpfe_suspend(struct device *dev)
2015 {
2016         return 0;
2017 }
2018
2019 static int vpfe_resume(struct device *dev)
2020 {
2021         return 0;
2022 }
2023
2024 static const struct dev_pm_ops vpfe_dev_pm_ops = {
2025         .suspend = vpfe_suspend,
2026         .resume = vpfe_resume,
2027 };
2028
2029 static struct platform_driver vpfe_driver = {
2030         .driver = {
2031                 .name = CAPTURE_DRV_NAME,
2032                 .pm = &vpfe_dev_pm_ops,
2033         },
2034         .probe = vpfe_probe,
2035         .remove = vpfe_remove,
2036 };
2037
2038 module_platform_driver(vpfe_driver);