drivers/media/platform/davinci/vpfe

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This source file includes following definitions.
vpfe_lookup_pix_format
vpfe_register_ccdc_device
vpfe_unregister_ccdc_device
vpfe_config_ccdc_image_format
vpfe_config_image_format
vpfe_initialize_device
vpfe_open
vpfe_schedule_next_buffer
vpfe_schedule_bottom_field
vpfe_process_buffer_complete
vpfe_isr
vdint1_isr
vpfe_detach_irq
vpfe_attach_irq
vpfe_stop_ccdc_capture
vpfe_release
vpfe_mmap
vpfe_poll
vpfe_check_format
vpfe_querycap
vpfe_g_fmt_vid_cap
vpfe_enum_fmt_vid_cap
vpfe_s_fmt_vid_cap
vpfe_try_fmt_vid_cap
vpfe_get_subdev_input_index
vpfe_get_app_input_index
vpfe_enum_input
vpfe_g_input
vpfe_s_input
vpfe_querystd
vpfe_s_std
vpfe_g_std
vpfe_videobuf_setup
vpfe_videobuf_prepare
vpfe_videobuf_queue
vpfe_videobuf_release
vpfe_reqbufs
vpfe_querybuf
vpfe_qbuf
vpfe_dqbuf
vpfe_calculate_offsets
vpfe_start_ccdc_capture
vpfe_streamon
vpfe_streamoff
vpfe_g_pixelaspect
vpfe_g_selection
vpfe_s_selection
vpfe_initialize
vpfe_probe
vpfe_remove
vpfe_suspend
vpfe_resume
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2008-2009 Texas Instruments Inc
   4  *
   5  * Driver name : VPFE Capture driver
   6  *    VPFE Capture driver allows applications to capture and stream video
   7  *    frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
   8  *    TVP5146 or  Raw Bayer RGB image data from an image sensor
   9  *    such as Microns' MT9T001, MT9T031 etc.
  10  *
  11  *    These SoCs have, in common, a Video Processing Subsystem (VPSS) that
  12  *    consists of a Video Processing Front End (VPFE) for capturing
  13  *    video/raw image data and Video Processing Back End (VPBE) for displaying
  14  *    YUV data through an in-built analog encoder or Digital LCD port. This
  15  *    driver is for capture through VPFE. A typical EVM using these SoCs have
  16  *    following high level configuration.
  17  *
  18  *    decoder(TVP5146/          YUV/
  19  *           MT9T001)   -->  Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
  20  *                              data input              |      |
  21  *                                                      V      |
  22  *                                                    SDRAM    |
  23  *                                                             V
  24  *                                                         Image Processor
  25  *                                                             |
  26  *                                                             V
  27  *                                                           SDRAM
  28  *    The data flow happens from a decoder connected to the VPFE over a
  29  *    YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
  30  *    and to the input of VPFE through an optional MUX (if more inputs are
  31  *    to be interfaced on the EVM). The input data is first passed through
  32  *    CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
  33  *    does very little or no processing on YUV data and does pre-process Raw
  34  *    Bayer RGB data through modules such as Defect Pixel Correction (DFC)
  35  *    Color Space Conversion (CSC), data gain/offset etc. After this, data
  36  *    can be written to SDRAM or can be connected to the image processing
  37  *    block such as IPIPE (on DM355 only).
  38  *
  39  *    Features supported
  40  *              - MMAP IO
  41  *              - Capture using TVP5146 over BT.656
  42  *              - support for interfacing decoders using sub device model
  43  *              - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
  44  *                data capture to SDRAM.
  45  *    TODO list
  46  *              - Support multiple REQBUF after open
  47  *              - Support for de-allocating buffers through REQBUF
  48  *              - Support for Raw Bayer RGB capture
  49  *              - Support for chaining Image Processor
  50  *              - Support for static allocation of buffers
  51  *              - Support for USERPTR IO
  52  *              - Support for STREAMON before QBUF
  53  *              - Support for control ioctls
  54  */
  55 #include <linux/module.h>
  56 #include <linux/slab.h>
  57 #include <linux/init.h>
  58 #include <linux/platform_device.h>
  59 #include <linux/interrupt.h>
  60 #include <media/v4l2-common.h>
  61 #include <linux/io.h>
  62 #include <media/davinci/vpfe_capture.h>
  63 #include "ccdc_hw_device.h"
  64 
  65 static int debug;
  66 static u32 numbuffers = 3;
  67 static u32 bufsize = (720 * 576 * 2);
  68 
  69 module_param(numbuffers, uint, S_IRUGO);
  70 module_param(bufsize, uint, S_IRUGO);
  71 module_param(debug, int, 0644);
  72 
  73 MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
  74 MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
  75 MODULE_PARM_DESC(debug, "Debug level 0-1");
  76 
  77 MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
  78 MODULE_LICENSE("GPL");
  79 MODULE_AUTHOR("Texas Instruments");
  80 
  81 /* standard information */
  82 struct vpfe_standard {
  83         v4l2_std_id std_id;
  84         unsigned int width;
  85         unsigned int height;
  86         struct v4l2_fract pixelaspect;
  87         /* 0 - progressive, 1 - interlaced */
  88         int frame_format;
  89 };
  90 
  91 /* ccdc configuration */
  92 struct ccdc_config {
  93         /* This make sure vpfe is probed and ready to go */
  94         int vpfe_probed;
  95         /* name of ccdc device */
  96         char name[32];
  97 };
  98 
  99 /* data structures */
 100 static struct vpfe_config_params config_params = {
 101         .min_numbuffers = 3,
 102         .numbuffers = 3,
 103         .min_bufsize = 720 * 480 * 2,
 104         .device_bufsize = 720 * 576 * 2,
 105 };
 106 
 107 /* ccdc device registered */
 108 static const struct ccdc_hw_device *ccdc_dev;
 109 /* lock for accessing ccdc information */
 110 static DEFINE_MUTEX(ccdc_lock);
 111 /* ccdc configuration */
 112 static struct ccdc_config *ccdc_cfg;
 113 
 114 static const struct vpfe_standard vpfe_standards[] = {
 115         {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
 116         {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
 117 };
 118 
 119 /* Used when raw Bayer image from ccdc is directly captured to SDRAM */
 120 static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
 121         {
 122                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 123                 .bpp = 1,
 124         },
 125         {
 126                 .pixelformat = V4L2_PIX_FMT_SBGGR16,
 127                 .bpp = 2,
 128         },
 129         {
 130                 .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
 131                 .bpp = 1,
 132         },
 133         {
 134                 .pixelformat = V4L2_PIX_FMT_UYVY,
 135                 .bpp = 2,
 136         },
 137         {
 138                 .pixelformat = V4L2_PIX_FMT_YUYV,
 139                 .bpp = 2,
 140         },
 141         {
 142                 .pixelformat = V4L2_PIX_FMT_NV12,
 143                 .bpp = 1,
 144         },
 145 };
 146 
 147 /*
 148  * vpfe_lookup_pix_format()
 149  * lookup an entry in the vpfe pix format table based on pix_format
 150  */
 151 static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
 152 {
 153         int i;
 154 
 155         for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
 156                 if (pix_format == vpfe_pix_fmts[i].pixelformat)
 157                         return &vpfe_pix_fmts[i];
 158         }
 159         return NULL;
 160 }
 161 
 162 /*
 163  * vpfe_register_ccdc_device. CCDC module calls this to
 164  * register with vpfe capture
 165  */
 166 int vpfe_register_ccdc_device(const struct ccdc_hw_device *dev)
 167 {
 168         int ret = 0;
 169         printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
 170 
 171         BUG_ON(!dev->hw_ops.open);
 172         BUG_ON(!dev->hw_ops.enable);
 173         BUG_ON(!dev->hw_ops.set_hw_if_params);
 174         BUG_ON(!dev->hw_ops.configure);
 175         BUG_ON(!dev->hw_ops.set_buftype);
 176         BUG_ON(!dev->hw_ops.get_buftype);
 177         BUG_ON(!dev->hw_ops.enum_pix);
 178         BUG_ON(!dev->hw_ops.set_frame_format);
 179         BUG_ON(!dev->hw_ops.get_frame_format);
 180         BUG_ON(!dev->hw_ops.get_pixel_format);
 181         BUG_ON(!dev->hw_ops.set_pixel_format);
 182         BUG_ON(!dev->hw_ops.set_image_window);
 183         BUG_ON(!dev->hw_ops.get_image_window);
 184         BUG_ON(!dev->hw_ops.get_line_length);
 185         BUG_ON(!dev->hw_ops.getfid);
 186 
 187         mutex_lock(&ccdc_lock);
 188         if (!ccdc_cfg) {
 189                 /*
 190                  * TODO. Will this ever happen? if so, we need to fix it.
 191                  * Proabably we need to add the request to a linked list and
 192                  * walk through it during vpfe probe
 193                  */
 194                 printk(KERN_ERR "vpfe capture not initialized\n");
 195                 ret = -EFAULT;
 196                 goto unlock;
 197         }
 198 
 199         if (strcmp(dev->name, ccdc_cfg->name)) {
 200                 /* ignore this ccdc */
 201                 ret = -EINVAL;
 202                 goto unlock;
 203         }
 204 
 205         if (ccdc_dev) {
 206                 printk(KERN_ERR "ccdc already registered\n");
 207                 ret = -EINVAL;
 208                 goto unlock;
 209         }
 210 
 211         ccdc_dev = dev;
 212 unlock:
 213         mutex_unlock(&ccdc_lock);
 214         return ret;
 215 }
 216 EXPORT_SYMBOL(vpfe_register_ccdc_device);
 217 
 218 /*
 219  * vpfe_unregister_ccdc_device. CCDC module calls this to
 220  * unregister with vpfe capture
 221  */
 222 void vpfe_unregister_ccdc_device(const struct ccdc_hw_device *dev)
 223 {
 224         if (!dev) {
 225                 printk(KERN_ERR "invalid ccdc device ptr\n");
 226                 return;
 227         }
 228 
 229         printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
 230                 dev->name);
 231 
 232         if (strcmp(dev->name, ccdc_cfg->name)) {
 233                 /* ignore this ccdc */
 234                 return;
 235         }
 236 
 237         mutex_lock(&ccdc_lock);
 238         ccdc_dev = NULL;
 239         mutex_unlock(&ccdc_lock);
 240 }
 241 EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
 242 
 243 /*
 244  * vpfe_config_ccdc_image_format()
 245  * For a pix format, configure ccdc to setup the capture
 246  */
 247 static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
 248 {
 249         enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
 250         int ret = 0;
 251 
 252         if (ccdc_dev->hw_ops.set_pixel_format(
 253                         vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
 254                 v4l2_err(&vpfe_dev->v4l2_dev,
 255                         "couldn't set pix format in ccdc\n");
 256                 return -EINVAL;
 257         }
 258         /* configure the image window */
 259         ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
 260 
 261         switch (vpfe_dev->fmt.fmt.pix.field) {
 262         case V4L2_FIELD_INTERLACED:
 263                 /* do nothing, since it is default */
 264                 ret = ccdc_dev->hw_ops.set_buftype(
 265                                 CCDC_BUFTYPE_FLD_INTERLEAVED);
 266                 break;
 267         case V4L2_FIELD_NONE:
 268                 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
 269                 /* buffer type only applicable for interlaced scan */
 270                 break;
 271         case V4L2_FIELD_SEQ_TB:
 272                 ret = ccdc_dev->hw_ops.set_buftype(
 273                                 CCDC_BUFTYPE_FLD_SEPARATED);
 274                 break;
 275         default:
 276                 return -EINVAL;
 277         }
 278 
 279         /* set the frame format */
 280         if (!ret)
 281                 ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
 282         return ret;
 283 }
 284 /*
 285  * vpfe_config_image_format()
 286  * For a given standard, this functions sets up the default
 287  * pix format & crop values in the vpfe device and ccdc.  It first
 288  * starts with defaults based values from the standard table.
 289  * It then checks if sub device supports get_fmt and then override the
 290  * values based on that.Sets crop values to match with scan resolution
 291  * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
 292  * values in ccdc
 293  */
 294 static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
 295                                     v4l2_std_id std_id)
 296 {
 297         struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
 298         struct v4l2_subdev_format fmt = {
 299                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 300         };
 301         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 302         struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
 303         int i, ret;
 304 
 305         for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
 306                 if (vpfe_standards[i].std_id & std_id) {
 307                         vpfe_dev->std_info.active_pixels =
 308                                         vpfe_standards[i].width;
 309                         vpfe_dev->std_info.active_lines =
 310                                         vpfe_standards[i].height;
 311                         vpfe_dev->std_info.frame_format =
 312                                         vpfe_standards[i].frame_format;
 313                         vpfe_dev->std_index = i;
 314                         break;
 315                 }
 316         }
 317 
 318         if (i ==  ARRAY_SIZE(vpfe_standards)) {
 319                 v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
 320                 return -EINVAL;
 321         }
 322 
 323         vpfe_dev->crop.top = 0;
 324         vpfe_dev->crop.left = 0;
 325         vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
 326         vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
 327         pix->width = vpfe_dev->crop.width;
 328         pix->height = vpfe_dev->crop.height;
 329 
 330         /* first field and frame format based on standard frame format */
 331         if (vpfe_dev->std_info.frame_format) {
 332                 pix->field = V4L2_FIELD_INTERLACED;
 333                 /* assume V4L2_PIX_FMT_UYVY as default */
 334                 pix->pixelformat = V4L2_PIX_FMT_UYVY;
 335                 v4l2_fill_mbus_format(mbus_fmt, pix,
 336                                 MEDIA_BUS_FMT_YUYV10_2X10);
 337         } else {
 338                 pix->field = V4L2_FIELD_NONE;
 339                 /* assume V4L2_PIX_FMT_SBGGR8 */
 340                 pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
 341                 v4l2_fill_mbus_format(mbus_fmt, pix,
 342                                 MEDIA_BUS_FMT_SBGGR8_1X8);
 343         }
 344 
 345         /* if sub device supports get_fmt, override the defaults */
 346         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 347                         sdinfo->grp_id, pad, get_fmt, NULL, &fmt);
 348 
 349         if (ret && ret != -ENOIOCTLCMD) {
 350                 v4l2_err(&vpfe_dev->v4l2_dev,
 351                         "error in getting get_fmt from sub device\n");
 352                 return ret;
 353         }
 354         v4l2_fill_pix_format(pix, mbus_fmt);
 355         pix->bytesperline = pix->width * 2;
 356         pix->sizeimage = pix->bytesperline * pix->height;
 357 
 358         /* Sets the values in CCDC */
 359         ret = vpfe_config_ccdc_image_format(vpfe_dev);
 360         if (ret)
 361                 return ret;
 362 
 363         /* Update the values of sizeimage and bytesperline */
 364         pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
 365         pix->sizeimage = pix->bytesperline * pix->height;
 366 
 367         return 0;
 368 }
 369 
 370 static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
 371 {
 372         int ret;
 373 
 374         /* set first input of current subdevice as the current input */
 375         vpfe_dev->current_input = 0;
 376 
 377         /* set default standard */
 378         vpfe_dev->std_index = 0;
 379 
 380         /* Configure the default format information */
 381         ret = vpfe_config_image_format(vpfe_dev,
 382                                 vpfe_standards[vpfe_dev->std_index].std_id);
 383         if (ret)
 384                 return ret;
 385 
 386         /* now open the ccdc device to initialize it */
 387         mutex_lock(&ccdc_lock);
 388         if (!ccdc_dev) {
 389                 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
 390                 ret = -ENODEV;
 391                 goto unlock;
 392         }
 393 
 394         if (!try_module_get(ccdc_dev->owner)) {
 395                 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
 396                 ret = -ENODEV;
 397                 goto unlock;
 398         }
 399         ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
 400         if (!ret)
 401                 vpfe_dev->initialized = 1;
 402 
 403         /* Clear all VPFE/CCDC interrupts */
 404         if (vpfe_dev->cfg->clr_intr)
 405                 vpfe_dev->cfg->clr_intr(-1);
 406 
 407 unlock:
 408         mutex_unlock(&ccdc_lock);
 409         return ret;
 410 }
 411 
 412 /*
 413  * vpfe_open : It creates object of file handle structure and
 414  * stores it in private_data  member of filepointer
 415  */
 416 static int vpfe_open(struct file *file)
 417 {
 418         struct vpfe_device *vpfe_dev = video_drvdata(file);
 419         struct video_device *vdev = video_devdata(file);
 420         struct vpfe_fh *fh;
 421 
 422         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
 423 
 424         if (!vpfe_dev->cfg->num_subdevs) {
 425                 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
 426                 return -ENODEV;
 427         }
 428 
 429         /* Allocate memory for the file handle object */
 430         fh = kmalloc(sizeof(*fh), GFP_KERNEL);
 431         if (!fh)
 432                 return -ENOMEM;
 433 
 434         /* store pointer to fh in private_data member of file */
 435         file->private_data = fh;
 436         fh->vpfe_dev = vpfe_dev;
 437         v4l2_fh_init(&fh->fh, vdev);
 438         mutex_lock(&vpfe_dev->lock);
 439         /* If decoder is not initialized. initialize it */
 440         if (!vpfe_dev->initialized) {
 441                 if (vpfe_initialize_device(vpfe_dev)) {
 442                         mutex_unlock(&vpfe_dev->lock);
 443                         v4l2_fh_exit(&fh->fh);
 444                         kfree(fh);
 445                         return -ENODEV;
 446                 }
 447         }
 448         /* Increment device usrs counter */
 449         vpfe_dev->usrs++;
 450         /* Set io_allowed member to false */
 451         fh->io_allowed = 0;
 452         v4l2_fh_add(&fh->fh);
 453         mutex_unlock(&vpfe_dev->lock);
 454         return 0;
 455 }
 456 
 457 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
 458 {
 459         unsigned long addr;
 460 
 461         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
 462                                         struct videobuf_buffer, queue);
 463         list_del(&vpfe_dev->next_frm->queue);
 464         vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
 465         addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
 466 
 467         ccdc_dev->hw_ops.setfbaddr(addr);
 468 }
 469 
 470 static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
 471 {
 472         unsigned long addr;
 473 
 474         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
 475         addr += vpfe_dev->field_off;
 476         ccdc_dev->hw_ops.setfbaddr(addr);
 477 }
 478 
 479 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
 480 {
 481         vpfe_dev->cur_frm->ts = ktime_get_ns();
 482         vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
 483         vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
 484         wake_up_interruptible(&vpfe_dev->cur_frm->done);
 485         vpfe_dev->cur_frm = vpfe_dev->next_frm;
 486 }
 487 
 488 /* ISR for VINT0*/
 489 static irqreturn_t vpfe_isr(int irq, void *dev_id)
 490 {
 491         struct vpfe_device *vpfe_dev = dev_id;
 492         enum v4l2_field field;
 493         int fid;
 494 
 495         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
 496         field = vpfe_dev->fmt.fmt.pix.field;
 497 
 498         /* if streaming not started, don't do anything */
 499         if (!vpfe_dev->started)
 500                 goto clear_intr;
 501 
 502         /* only for 6446 this will be applicable */
 503         if (ccdc_dev->hw_ops.reset)
 504                 ccdc_dev->hw_ops.reset();
 505 
 506         if (field == V4L2_FIELD_NONE) {
 507                 /* handle progressive frame capture */
 508                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
 509                         "frame format is progressive...\n");
 510                 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 511                         vpfe_process_buffer_complete(vpfe_dev);
 512                 goto clear_intr;
 513         }
 514 
 515         /* interlaced or TB capture check which field we are in hardware */
 516         fid = ccdc_dev->hw_ops.getfid();
 517 
 518         /* switch the software maintained field id */
 519         vpfe_dev->field_id ^= 1;
 520         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
 521                 fid, vpfe_dev->field_id);
 522         if (fid == vpfe_dev->field_id) {
 523                 /* we are in-sync here,continue */
 524                 if (fid == 0) {
 525                         /*
 526                          * One frame is just being captured. If the next frame
 527                          * is available, release the current frame and move on
 528                          */
 529                         if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
 530                                 vpfe_process_buffer_complete(vpfe_dev);
 531                         /*
 532                          * based on whether the two fields are stored
 533                          * interleavely or separately in memory, reconfigure
 534                          * the CCDC memory address
 535                          */
 536                         if (field == V4L2_FIELD_SEQ_TB)
 537                                 vpfe_schedule_bottom_field(vpfe_dev);
 538                         goto clear_intr;
 539                 }
 540                 /*
 541                  * if one field is just being captured configure
 542                  * the next frame get the next frame from the empty
 543                  * queue if no frame is available hold on to the
 544                  * current buffer
 545                  */
 546                 spin_lock(&vpfe_dev->dma_queue_lock);
 547                 if (!list_empty(&vpfe_dev->dma_queue) &&
 548                     vpfe_dev->cur_frm == vpfe_dev->next_frm)
 549                         vpfe_schedule_next_buffer(vpfe_dev);
 550                 spin_unlock(&vpfe_dev->dma_queue_lock);
 551         } else if (fid == 0) {
 552                 /*
 553                  * out of sync. Recover from any hardware out-of-sync.
 554                  * May loose one frame
 555                  */
 556                 vpfe_dev->field_id = fid;
 557         }
 558 clear_intr:
 559         if (vpfe_dev->cfg->clr_intr)
 560                 vpfe_dev->cfg->clr_intr(irq);
 561 
 562         return IRQ_HANDLED;
 563 }
 564 
 565 /* vdint1_isr - isr handler for VINT1 interrupt */
 566 static irqreturn_t vdint1_isr(int irq, void *dev_id)
 567 {
 568         struct vpfe_device *vpfe_dev = dev_id;
 569 
 570         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
 571 
 572         /* if streaming not started, don't do anything */
 573         if (!vpfe_dev->started) {
 574                 if (vpfe_dev->cfg->clr_intr)
 575                         vpfe_dev->cfg->clr_intr(irq);
 576                 return IRQ_HANDLED;
 577         }
 578 
 579         spin_lock(&vpfe_dev->dma_queue_lock);
 580         if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
 581             !list_empty(&vpfe_dev->dma_queue) &&
 582             vpfe_dev->cur_frm == vpfe_dev->next_frm)
 583                 vpfe_schedule_next_buffer(vpfe_dev);
 584         spin_unlock(&vpfe_dev->dma_queue_lock);
 585 
 586         if (vpfe_dev->cfg->clr_intr)
 587                 vpfe_dev->cfg->clr_intr(irq);
 588 
 589         return IRQ_HANDLED;
 590 }
 591 
 592 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
 593 {
 594         enum ccdc_frmfmt frame_format;
 595 
 596         frame_format = ccdc_dev->hw_ops.get_frame_format();
 597         if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
 598                 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
 599 }
 600 
 601 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
 602 {
 603         enum ccdc_frmfmt frame_format;
 604 
 605         frame_format = ccdc_dev->hw_ops.get_frame_format();
 606         if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
 607                 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
 608                                     0, "vpfe_capture1",
 609                                     vpfe_dev);
 610         }
 611         return 0;
 612 }
 613 
 614 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
 615 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
 616 {
 617         vpfe_dev->started = 0;
 618         ccdc_dev->hw_ops.enable(0);
 619         if (ccdc_dev->hw_ops.enable_out_to_sdram)
 620                 ccdc_dev->hw_ops.enable_out_to_sdram(0);
 621 }
 622 
 623 /*
 624  * vpfe_release : This function deletes buffer queue, frees the
 625  * buffers and the vpfe file  handle
 626  */
 627 static int vpfe_release(struct file *file)
 628 {
 629         struct vpfe_device *vpfe_dev = video_drvdata(file);
 630         struct vpfe_fh *fh = file->private_data;
 631         struct vpfe_subdev_info *sdinfo;
 632         int ret;
 633 
 634         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
 635 
 636         /* Get the device lock */
 637         mutex_lock(&vpfe_dev->lock);
 638         /* if this instance is doing IO */
 639         if (fh->io_allowed) {
 640                 if (vpfe_dev->started) {
 641                         sdinfo = vpfe_dev->current_subdev;
 642                         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
 643                                                          sdinfo->grp_id,
 644                                                          video, s_stream, 0);
 645                         if (ret && (ret != -ENOIOCTLCMD))
 646                                 v4l2_err(&vpfe_dev->v4l2_dev,
 647                                 "stream off failed in subdev\n");
 648                         vpfe_stop_ccdc_capture(vpfe_dev);
 649                         vpfe_detach_irq(vpfe_dev);
 650                         videobuf_streamoff(&vpfe_dev->buffer_queue);
 651                 }
 652                 vpfe_dev->io_usrs = 0;
 653                 vpfe_dev->numbuffers = config_params.numbuffers;
 654                 videobuf_stop(&vpfe_dev->buffer_queue);
 655                 videobuf_mmap_free(&vpfe_dev->buffer_queue);
 656         }
 657 
 658         /* Decrement device usrs counter */
 659         vpfe_dev->usrs--;
 660         v4l2_fh_del(&fh->fh);
 661         v4l2_fh_exit(&fh->fh);
 662         /* If this is the last file handle */
 663         if (!vpfe_dev->usrs) {
 664                 vpfe_dev->initialized = 0;
 665                 if (ccdc_dev->hw_ops.close)
 666                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
 667                 module_put(ccdc_dev->owner);
 668         }
 669         mutex_unlock(&vpfe_dev->lock);
 670         file->private_data = NULL;
 671         /* Free memory allocated to file handle object */
 672         kfree(fh);
 673         return 0;
 674 }
 675 
 676 /*
 677  * vpfe_mmap : It is used to map kernel space buffers
 678  * into user spaces
 679  */
 680 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
 681 {
 682         /* Get the device object and file handle object */
 683         struct vpfe_device *vpfe_dev = video_drvdata(file);
 684 
 685         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
 686 
 687         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
 688 }
 689 
 690 /*
 691  * vpfe_poll: It is used for select/poll system call
 692  */
 693 static __poll_t vpfe_poll(struct file *file, poll_table *wait)
 694 {
 695         struct vpfe_device *vpfe_dev = video_drvdata(file);
 696 
 697         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
 698 
 699         if (vpfe_dev->started)
 700                 return videobuf_poll_stream(file,
 701                                             &vpfe_dev->buffer_queue, wait);
 702         return 0;
 703 }
 704 
 705 /* vpfe capture driver file operations */
 706 static const struct v4l2_file_operations vpfe_fops = {
 707         .owner = THIS_MODULE,
 708         .open = vpfe_open,
 709         .release = vpfe_release,
 710         .unlocked_ioctl = video_ioctl2,
 711         .mmap = vpfe_mmap,
 712         .poll = vpfe_poll
 713 };
 714 
 715 /*
 716  * vpfe_check_format()
 717  * This function adjust the input pixel format as per hardware
 718  * capabilities and update the same in pixfmt.
 719  * Following algorithm used :-
 720  *
 721  *      If given pixformat is not in the vpfe list of pix formats or not
 722  *      supported by the hardware, current value of pixformat in the device
 723  *      is used
 724  *      If given field is not supported, then current field is used. If field
 725  *      is different from current, then it is matched with that from sub device.
 726  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
 727  *      progressive. Maximum height is clamped to active active lines of scan
 728  *      Minimum width is 32 bytes in memory and width is clamped to active
 729  *      pixels of scan.
 730  *      bytesperline is a multiple of 32.
 731  */
 732 static const struct vpfe_pixel_format *
 733         vpfe_check_format(struct vpfe_device *vpfe_dev,
 734                           struct v4l2_pix_format *pixfmt)
 735 {
 736         u32 min_height = 1, min_width = 32, max_width, max_height;
 737         const struct vpfe_pixel_format *vpfe_pix_fmt;
 738         u32 pix;
 739         int temp, found;
 740 
 741         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 742         if (!vpfe_pix_fmt) {
 743                 /*
 744                  * use current pixel format in the vpfe device. We
 745                  * will find this pix format in the table
 746                  */
 747                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 748                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 749         }
 750 
 751         /* check if hw supports it */
 752         temp = 0;
 753         found = 0;
 754         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
 755                 if (vpfe_pix_fmt->pixelformat == pix) {
 756                         found = 1;
 757                         break;
 758                 }
 759                 temp++;
 760         }
 761 
 762         if (!found) {
 763                 /* use current pixel format */
 764                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
 765                 /*
 766                  * Since this is currently used in the vpfe device, we
 767                  * will find this pix format in the table
 768                  */
 769                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
 770         }
 771 
 772         /* check what field format is supported */
 773         if (pixfmt->field == V4L2_FIELD_ANY) {
 774                 /* if field is any, use current value as default */
 775                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 776         }
 777 
 778         /*
 779          * if field is not same as current field in the vpfe device
 780          * try matching the field with the sub device field
 781          */
 782         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
 783                 /*
 784                  * If field value is not in the supported fields, use current
 785                  * field used in the device as default
 786                  */
 787                 switch (pixfmt->field) {
 788                 case V4L2_FIELD_INTERLACED:
 789                 case V4L2_FIELD_SEQ_TB:
 790                         /* if sub device is supporting progressive, use that */
 791                         if (!vpfe_dev->std_info.frame_format)
 792                                 pixfmt->field = V4L2_FIELD_NONE;
 793                         break;
 794                 case V4L2_FIELD_NONE:
 795                         if (vpfe_dev->std_info.frame_format)
 796                                 pixfmt->field = V4L2_FIELD_INTERLACED;
 797                         break;
 798 
 799                 default:
 800                         /* use current field as default */
 801                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
 802                         break;
 803                 }
 804         }
 805 
 806         /* Now adjust image resolutions supported */
 807         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
 808             pixfmt->field == V4L2_FIELD_SEQ_TB)
 809                 min_height = 2;
 810 
 811         max_width = vpfe_dev->std_info.active_pixels;
 812         max_height = vpfe_dev->std_info.active_lines;
 813         min_width /= vpfe_pix_fmt->bpp;
 814 
 815         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
 816                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
 817 
 818         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
 819         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
 820 
 821         /* If interlaced, adjust height to be a multiple of 2 */
 822         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 823                 pixfmt->height &= (~1);
 824         /*
 825          * recalculate bytesperline and sizeimage since width
 826          * and height might have changed
 827          */
 828         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
 829                                 & ~31);
 830         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 831                 pixfmt->sizeimage =
 832                         pixfmt->bytesperline * pixfmt->height +
 833                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
 834         else
 835                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 836 
 837         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height = %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
 838                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
 839                  pixfmt->bytesperline, pixfmt->sizeimage);
 840         return vpfe_pix_fmt;
 841 }
 842 
 843 static int vpfe_querycap(struct file *file, void  *priv,
 844                                struct v4l2_capability *cap)
 845 {
 846         struct vpfe_device *vpfe_dev = video_drvdata(file);
 847 
 848         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
 849 
 850         strscpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 851         strscpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
 852         strscpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
 853         return 0;
 854 }
 855 
 856 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
 857                                 struct v4l2_format *fmt)
 858 {
 859         struct vpfe_device *vpfe_dev = video_drvdata(file);
 860 
 861         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
 862         /* Fill in the information about format */
 863         *fmt = vpfe_dev->fmt;
 864         return 0;
 865 }
 866 
 867 static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
 868                                    struct v4l2_fmtdesc *fmt)
 869 {
 870         struct vpfe_device *vpfe_dev = video_drvdata(file);
 871         const struct vpfe_pixel_format *pix_fmt;
 872         u32 pix;
 873 
 874         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
 875 
 876         if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
 877                 return -EINVAL;
 878 
 879         /* Fill in the information about format */
 880         pix_fmt = vpfe_lookup_pix_format(pix);
 881         if (pix_fmt) {
 882                 fmt->pixelformat = fmt->pixelformat;
 883                 return 0;
 884         }
 885         return -EINVAL;
 886 }
 887 
 888 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
 889                                 struct v4l2_format *fmt)
 890 {
 891         struct vpfe_device *vpfe_dev = video_drvdata(file);
 892         const struct vpfe_pixel_format *pix_fmts;
 893         int ret;
 894 
 895         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
 896 
 897         /* If streaming is started, return error */
 898         if (vpfe_dev->started) {
 899                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
 900                 return -EBUSY;
 901         }
 902 
 903         /* Check for valid frame format */
 904         pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
 905         if (!pix_fmts)
 906                 return -EINVAL;
 907 
 908         /* store the pixel format in the device  object */
 909         ret = mutex_lock_interruptible(&vpfe_dev->lock);
 910         if (ret)
 911                 return ret;
 912 
 913         /* First detach any IRQ if currently attached */
 914         vpfe_detach_irq(vpfe_dev);
 915         vpfe_dev->fmt = *fmt;
 916         /* set image capture parameters in the ccdc */
 917         ret = vpfe_config_ccdc_image_format(vpfe_dev);
 918         mutex_unlock(&vpfe_dev->lock);
 919         return ret;
 920 }
 921 
 922 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
 923                                   struct v4l2_format *f)
 924 {
 925         struct vpfe_device *vpfe_dev = video_drvdata(file);
 926         const struct vpfe_pixel_format *pix_fmts;
 927 
 928         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
 929 
 930         pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
 931         if (!pix_fmts)
 932                 return -EINVAL;
 933         return 0;
 934 }
 935 
 936 /*
 937  * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
 938  * given app input index
 939  */
 940 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
 941                                         int *subdev_index,
 942                                         int *subdev_input_index,
 943                                         int app_input_index)
 944 {
 945         struct vpfe_config *cfg = vpfe_dev->cfg;
 946         struct vpfe_subdev_info *sdinfo;
 947         int i, j = 0;
 948 
 949         for (i = 0; i < cfg->num_subdevs; i++) {
 950                 sdinfo = &cfg->sub_devs[i];
 951                 if (app_input_index < (j + sdinfo->num_inputs)) {
 952                         *subdev_index = i;
 953                         *subdev_input_index = app_input_index - j;
 954                         return 0;
 955                 }
 956                 j += sdinfo->num_inputs;
 957         }
 958         return -EINVAL;
 959 }
 960 
 961 /*
 962  * vpfe_get_app_input - Get app input index for a given subdev input index
 963  * driver stores the input index of the current sub device and translate it
 964  * when application request the current input
 965  */
 966 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
 967                                     int *app_input_index)
 968 {
 969         struct vpfe_config *cfg = vpfe_dev->cfg;
 970         struct vpfe_subdev_info *sdinfo;
 971         int i, j = 0;
 972 
 973         for (i = 0; i < cfg->num_subdevs; i++) {
 974                 sdinfo = &cfg->sub_devs[i];
 975                 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
 976                         if (vpfe_dev->current_input >= sdinfo->num_inputs)
 977                                 return -1;
 978                         *app_input_index = j + vpfe_dev->current_input;
 979                         return 0;
 980                 }
 981                 j += sdinfo->num_inputs;
 982         }
 983         return -EINVAL;
 984 }
 985 
 986 static int vpfe_enum_input(struct file *file, void *priv,
 987                                  struct v4l2_input *inp)
 988 {
 989         struct vpfe_device *vpfe_dev = video_drvdata(file);
 990         struct vpfe_subdev_info *sdinfo;
 991         int subdev, index ;
 992 
 993         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
 994 
 995         if (vpfe_get_subdev_input_index(vpfe_dev,
 996                                         &subdev,
 997                                         &index,
 998                                         inp->index) < 0) {
 999                 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found for the subdev\n");
1000                 return -EINVAL;
1001         }
1002         sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1003         *inp = sdinfo->inputs[index];
1004         return 0;
1005 }
1006 
1007 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1008 {
1009         struct vpfe_device *vpfe_dev = video_drvdata(file);
1010 
1011         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1012 
1013         return vpfe_get_app_input_index(vpfe_dev, index);
1014 }
1015 
1016 
1017 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1018 {
1019         struct vpfe_device *vpfe_dev = video_drvdata(file);
1020         struct v4l2_subdev *sd;
1021         struct vpfe_subdev_info *sdinfo;
1022         int subdev_index, inp_index;
1023         struct vpfe_route *route;
1024         u32 input, output;
1025         int ret;
1026 
1027         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1028 
1029         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1030         if (ret)
1031                 return ret;
1032 
1033         /*
1034          * If streaming is started return device busy
1035          * error
1036          */
1037         if (vpfe_dev->started) {
1038                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1039                 ret = -EBUSY;
1040                 goto unlock_out;
1041         }
1042         ret = vpfe_get_subdev_input_index(vpfe_dev,
1043                                           &subdev_index,
1044                                           &inp_index,
1045                                           index);
1046         if (ret < 0) {
1047                 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1048                 goto unlock_out;
1049         }
1050 
1051         sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1052         sd = vpfe_dev->sd[subdev_index];
1053         route = &sdinfo->routes[inp_index];
1054         if (route && sdinfo->can_route) {
1055                 input = route->input;
1056                 output = route->output;
1057         } else {
1058                 input = 0;
1059                 output = 0;
1060         }
1061 
1062         if (sd)
1063                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1064 
1065         if (ret) {
1066                 v4l2_err(&vpfe_dev->v4l2_dev,
1067                         "vpfe_doioctl:error in setting input in decoder\n");
1068                 ret = -EINVAL;
1069                 goto unlock_out;
1070         }
1071         vpfe_dev->current_subdev = sdinfo;
1072         if (sd)
1073                 vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1074         vpfe_dev->current_input = index;
1075         vpfe_dev->std_index = 0;
1076 
1077         /* set the bus/interface parameter for the sub device in ccdc */
1078         ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1079         if (ret)
1080                 goto unlock_out;
1081 
1082         /* set the default image parameters in the device */
1083         ret = vpfe_config_image_format(vpfe_dev,
1084                                 vpfe_standards[vpfe_dev->std_index].std_id);
1085 unlock_out:
1086         mutex_unlock(&vpfe_dev->lock);
1087         return ret;
1088 }
1089 
1090 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1091 {
1092         struct vpfe_device *vpfe_dev = video_drvdata(file);
1093         struct vpfe_subdev_info *sdinfo;
1094         int ret;
1095 
1096         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1097 
1098         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1099         sdinfo = vpfe_dev->current_subdev;
1100         if (ret)
1101                 return ret;
1102         /* Call querystd function of decoder device */
1103         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1104                                          video, querystd, std_id);
1105         mutex_unlock(&vpfe_dev->lock);
1106         return ret;
1107 }
1108 
1109 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1110 {
1111         struct vpfe_device *vpfe_dev = video_drvdata(file);
1112         struct vpfe_subdev_info *sdinfo;
1113         int ret;
1114 
1115         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1116 
1117         /* Call decoder driver function to set the standard */
1118         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1119         if (ret)
1120                 return ret;
1121 
1122         sdinfo = vpfe_dev->current_subdev;
1123         /* If streaming is started, return device busy error */
1124         if (vpfe_dev->started) {
1125                 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1126                 ret = -EBUSY;
1127                 goto unlock_out;
1128         }
1129 
1130         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1131                                          video, s_std, std_id);
1132         if (ret < 0) {
1133                 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1134                 goto unlock_out;
1135         }
1136         ret = vpfe_config_image_format(vpfe_dev, std_id);
1137 
1138 unlock_out:
1139         mutex_unlock(&vpfe_dev->lock);
1140         return ret;
1141 }
1142 
1143 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1144 {
1145         struct vpfe_device *vpfe_dev = video_drvdata(file);
1146 
1147         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1148 
1149         *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1150         return 0;
1151 }
1152 /*
1153  *  Videobuf operations
1154  */
1155 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1156                                 unsigned int *count,
1157                                 unsigned int *size)
1158 {
1159         struct vpfe_fh *fh = vq->priv_data;
1160         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1161 
1162         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1163         *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1164         if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1165                 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1166                 *size = config_params.device_bufsize;
1167 
1168         if (*count < config_params.min_numbuffers)
1169                 *count = config_params.min_numbuffers;
1170         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1171                 "count=%d, size=%d\n", *count, *size);
1172         return 0;
1173 }
1174 
1175 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1176                                 struct videobuf_buffer *vb,
1177                                 enum v4l2_field field)
1178 {
1179         struct vpfe_fh *fh = vq->priv_data;
1180         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1181         unsigned long addr;
1182         int ret;
1183 
1184         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1185 
1186         /* If buffer is not initialized, initialize it */
1187         if (VIDEOBUF_NEEDS_INIT == vb->state) {
1188                 vb->width = vpfe_dev->fmt.fmt.pix.width;
1189                 vb->height = vpfe_dev->fmt.fmt.pix.height;
1190                 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1191                 vb->field = field;
1192 
1193                 ret = videobuf_iolock(vq, vb, NULL);
1194                 if (ret < 0)
1195                         return ret;
1196 
1197                 addr = videobuf_to_dma_contig(vb);
1198                 /* Make sure user addresses are aligned to 32 bytes */
1199                 if (!ALIGN(addr, 32))
1200                         return -EINVAL;
1201 
1202                 vb->state = VIDEOBUF_PREPARED;
1203         }
1204         return 0;
1205 }
1206 
1207 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1208                                 struct videobuf_buffer *vb)
1209 {
1210         /* Get the file handle object and device object */
1211         struct vpfe_fh *fh = vq->priv_data;
1212         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1213         unsigned long flags;
1214 
1215         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1216 
1217         /* add the buffer to the DMA queue */
1218         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1219         list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1220         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1221 
1222         /* Change state of the buffer */
1223         vb->state = VIDEOBUF_QUEUED;
1224 }
1225 
1226 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1227                                   struct videobuf_buffer *vb)
1228 {
1229         struct vpfe_fh *fh = vq->priv_data;
1230         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1231         unsigned long flags;
1232 
1233         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1234 
1235         /*
1236          * We need to flush the buffer from the dma queue since
1237          * they are de-allocated
1238          */
1239         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1240         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1241         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1242         videobuf_dma_contig_free(vq, vb);
1243         vb->state = VIDEOBUF_NEEDS_INIT;
1244 }
1245 
1246 static const struct videobuf_queue_ops vpfe_videobuf_qops = {
1247         .buf_setup      = vpfe_videobuf_setup,
1248         .buf_prepare    = vpfe_videobuf_prepare,
1249         .buf_queue      = vpfe_videobuf_queue,
1250         .buf_release    = vpfe_videobuf_release,
1251 };
1252 
1253 /*
1254  * vpfe_reqbufs. currently support REQBUF only once opening
1255  * the device.
1256  */
1257 static int vpfe_reqbufs(struct file *file, void *priv,
1258                         struct v4l2_requestbuffers *req_buf)
1259 {
1260         struct vpfe_device *vpfe_dev = video_drvdata(file);
1261         struct vpfe_fh *fh = file->private_data;
1262         int ret;
1263 
1264         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1265 
1266         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1267                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1268                 return -EINVAL;
1269         }
1270 
1271         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1272         if (ret)
1273                 return ret;
1274 
1275         if (vpfe_dev->io_usrs != 0) {
1276                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1277                 ret = -EBUSY;
1278                 goto unlock_out;
1279         }
1280 
1281         vpfe_dev->memory = req_buf->memory;
1282         videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1283                                 &vpfe_videobuf_qops,
1284                                 vpfe_dev->pdev,
1285                                 &vpfe_dev->irqlock,
1286                                 req_buf->type,
1287                                 vpfe_dev->fmt.fmt.pix.field,
1288                                 sizeof(struct videobuf_buffer),
1289                                 fh, NULL);
1290 
1291         fh->io_allowed = 1;
1292         vpfe_dev->io_usrs = 1;
1293         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1294         ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1295 unlock_out:
1296         mutex_unlock(&vpfe_dev->lock);
1297         return ret;
1298 }
1299 
1300 static int vpfe_querybuf(struct file *file, void *priv,
1301                          struct v4l2_buffer *buf)
1302 {
1303         struct vpfe_device *vpfe_dev = video_drvdata(file);
1304 
1305         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1306 
1307         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1308                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1309                 return  -EINVAL;
1310         }
1311 
1312         if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1313                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1314                 return -EINVAL;
1315         }
1316         /* Call videobuf_querybuf to get information */
1317         return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1318 }
1319 
1320 static int vpfe_qbuf(struct file *file, void *priv,
1321                      struct v4l2_buffer *p)
1322 {
1323         struct vpfe_device *vpfe_dev = video_drvdata(file);
1324         struct vpfe_fh *fh = file->private_data;
1325 
1326         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1327 
1328         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1329                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1330                 return -EINVAL;
1331         }
1332 
1333         /*
1334          * If this file handle is not allowed to do IO,
1335          * return error
1336          */
1337         if (!fh->io_allowed) {
1338                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1339                 return -EACCES;
1340         }
1341         return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1342 }
1343 
1344 static int vpfe_dqbuf(struct file *file, void *priv,
1345                       struct v4l2_buffer *buf)
1346 {
1347         struct vpfe_device *vpfe_dev = video_drvdata(file);
1348 
1349         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1350 
1351         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1352                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1353                 return -EINVAL;
1354         }
1355         return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1356                                       buf, file->f_flags & O_NONBLOCK);
1357 }
1358 
1359 /*
1360  * vpfe_calculate_offsets : This function calculates buffers offset
1361  * for top and bottom field
1362  */
1363 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1364 {
1365         struct v4l2_rect image_win;
1366 
1367         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1368 
1369         ccdc_dev->hw_ops.get_image_window(&image_win);
1370         vpfe_dev->field_off = image_win.height * image_win.width;
1371 }
1372 
1373 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1374 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1375 {
1376         ccdc_dev->hw_ops.enable(1);
1377         if (ccdc_dev->hw_ops.enable_out_to_sdram)
1378                 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1379         vpfe_dev->started = 1;
1380 }
1381 
1382 /*
1383  * vpfe_streamon. Assume the DMA queue is not empty.
1384  * application is expected to call QBUF before calling
1385  * this ioctl. If not, driver returns error
1386  */
1387 static int vpfe_streamon(struct file *file, void *priv,
1388                          enum v4l2_buf_type buf_type)
1389 {
1390         struct vpfe_device *vpfe_dev = video_drvdata(file);
1391         struct vpfe_fh *fh = file->private_data;
1392         struct vpfe_subdev_info *sdinfo;
1393         unsigned long addr;
1394         int ret;
1395 
1396         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1397 
1398         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1399                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1400                 return -EINVAL;
1401         }
1402 
1403         /* If file handle is not allowed IO, return error */
1404         if (!fh->io_allowed) {
1405                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1406                 return -EACCES;
1407         }
1408 
1409         sdinfo = vpfe_dev->current_subdev;
1410         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1411                                         video, s_stream, 1);
1412 
1413         if (ret && (ret != -ENOIOCTLCMD)) {
1414                 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1415                 return -EINVAL;
1416         }
1417 
1418         /* If buffer queue is empty, return error */
1419         if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1420                 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1421                 return -EIO;
1422         }
1423 
1424         /* Call videobuf_streamon to start streaming * in videobuf */
1425         ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1426         if (ret)
1427                 return ret;
1428 
1429 
1430         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1431         if (ret)
1432                 goto streamoff;
1433         /* Get the next frame from the buffer queue */
1434         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1435                                         struct videobuf_buffer, queue);
1436         vpfe_dev->cur_frm = vpfe_dev->next_frm;
1437         /* Remove buffer from the buffer queue */
1438         list_del(&vpfe_dev->cur_frm->queue);
1439         /* Mark state of the current frame to active */
1440         vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1441         /* Initialize field_id and started member */
1442         vpfe_dev->field_id = 0;
1443         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1444 
1445         /* Calculate field offset */
1446         vpfe_calculate_offsets(vpfe_dev);
1447 
1448         if (vpfe_attach_irq(vpfe_dev) < 0) {
1449                 v4l2_err(&vpfe_dev->v4l2_dev,
1450                          "Error in attaching interrupt handle\n");
1451                 ret = -EFAULT;
1452                 goto unlock_out;
1453         }
1454         if (ccdc_dev->hw_ops.configure() < 0) {
1455                 v4l2_err(&vpfe_dev->v4l2_dev,
1456                          "Error in configuring ccdc\n");
1457                 ret = -EINVAL;
1458                 goto unlock_out;
1459         }
1460         ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1461         vpfe_start_ccdc_capture(vpfe_dev);
1462         mutex_unlock(&vpfe_dev->lock);
1463         return ret;
1464 unlock_out:
1465         mutex_unlock(&vpfe_dev->lock);
1466 streamoff:
1467         videobuf_streamoff(&vpfe_dev->buffer_queue);
1468         return ret;
1469 }
1470 
1471 static int vpfe_streamoff(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         int ret;
1478 
1479         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1480 
1481         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1482                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1483                 return -EINVAL;
1484         }
1485 
1486         /* If io is allowed for this file handle, return error */
1487         if (!fh->io_allowed) {
1488                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1489                 return -EACCES;
1490         }
1491 
1492         /* If streaming is not started, return error */
1493         if (!vpfe_dev->started) {
1494                 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1495                 return -EINVAL;
1496         }
1497 
1498         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1499         if (ret)
1500                 return ret;
1501 
1502         vpfe_stop_ccdc_capture(vpfe_dev);
1503         vpfe_detach_irq(vpfe_dev);
1504 
1505         sdinfo = vpfe_dev->current_subdev;
1506         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1507                                         video, s_stream, 0);
1508 
1509         if (ret && (ret != -ENOIOCTLCMD))
1510                 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1511         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1512         mutex_unlock(&vpfe_dev->lock);
1513         return ret;
1514 }
1515 
1516 static int vpfe_g_pixelaspect(struct file *file, void *priv,
1517                               int type, struct v4l2_fract *f)
1518 {
1519         struct vpfe_device *vpfe_dev = video_drvdata(file);
1520 
1521         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_pixelaspect\n");
1522 
1523         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1524                 return -EINVAL;
1525         /* If std_index is invalid, then just return (== 1:1 aspect) */
1526         if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1527                 return 0;
1528 
1529         *f = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1530         return 0;
1531 }
1532 
1533 static int vpfe_g_selection(struct file *file, void *priv,
1534                             struct v4l2_selection *sel)
1535 {
1536         struct vpfe_device *vpfe_dev = video_drvdata(file);
1537 
1538         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_selection\n");
1539 
1540         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1541                 return -EINVAL;
1542 
1543         switch (sel->target) {
1544         case V4L2_SEL_TGT_CROP:
1545                 sel->r = vpfe_dev->crop;
1546                 break;
1547         case V4L2_SEL_TGT_CROP_DEFAULT:
1548         case V4L2_SEL_TGT_CROP_BOUNDS:
1549                 sel->r.width = vpfe_standards[vpfe_dev->std_index].width;
1550                 sel->r.height = vpfe_standards[vpfe_dev->std_index].height;
1551                 break;
1552         default:
1553                 return -EINVAL;
1554         }
1555         return 0;
1556 }
1557 
1558 static int vpfe_s_selection(struct file *file, void *priv,
1559                             struct v4l2_selection *sel)
1560 {
1561         struct vpfe_device *vpfe_dev = video_drvdata(file);
1562         struct v4l2_rect rect = sel->r;
1563         int ret;
1564 
1565         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_selection\n");
1566 
1567         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1568             sel->target != V4L2_SEL_TGT_CROP)
1569                 return -EINVAL;
1570 
1571         if (vpfe_dev->started) {
1572                 /* make sure streaming is not started */
1573                 v4l2_err(&vpfe_dev->v4l2_dev,
1574                         "Cannot change crop when streaming is ON\n");
1575                 return -EBUSY;
1576         }
1577 
1578         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1579         if (ret)
1580                 return ret;
1581 
1582         if (rect.top < 0 || rect.left < 0) {
1583                 v4l2_err(&vpfe_dev->v4l2_dev,
1584                         "doesn't support negative values for top & left\n");
1585                 ret = -EINVAL;
1586                 goto unlock_out;
1587         }
1588 
1589         /* adjust the width to 16 pixel boundary */
1590         rect.width = ((rect.width + 15) & ~0xf);
1591 
1592         /* make sure parameters are valid */
1593         if ((rect.left + rect.width >
1594                 vpfe_dev->std_info.active_pixels) ||
1595             (rect.top + rect.height >
1596                 vpfe_dev->std_info.active_lines)) {
1597                 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_SELECTION params\n");
1598                 ret = -EINVAL;
1599                 goto unlock_out;
1600         }
1601         ccdc_dev->hw_ops.set_image_window(&rect);
1602         vpfe_dev->fmt.fmt.pix.width = rect.width;
1603         vpfe_dev->fmt.fmt.pix.height = rect.height;
1604         vpfe_dev->fmt.fmt.pix.bytesperline =
1605                 ccdc_dev->hw_ops.get_line_length();
1606         vpfe_dev->fmt.fmt.pix.sizeimage =
1607                 vpfe_dev->fmt.fmt.pix.bytesperline *
1608                 vpfe_dev->fmt.fmt.pix.height;
1609         vpfe_dev->crop = rect;
1610         sel->r = rect;
1611 unlock_out:
1612         mutex_unlock(&vpfe_dev->lock);
1613         return ret;
1614 }
1615 
1616 /* vpfe capture ioctl operations */
1617 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1618         .vidioc_querycap         = vpfe_querycap,
1619         .vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1620         .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1621         .vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1622         .vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1623         .vidioc_enum_input       = vpfe_enum_input,
1624         .vidioc_g_input          = vpfe_g_input,
1625         .vidioc_s_input          = vpfe_s_input,
1626         .vidioc_querystd         = vpfe_querystd,
1627         .vidioc_s_std            = vpfe_s_std,
1628         .vidioc_g_std            = vpfe_g_std,
1629         .vidioc_reqbufs          = vpfe_reqbufs,
1630         .vidioc_querybuf         = vpfe_querybuf,
1631         .vidioc_qbuf             = vpfe_qbuf,
1632         .vidioc_dqbuf            = vpfe_dqbuf,
1633         .vidioc_streamon         = vpfe_streamon,
1634         .vidioc_streamoff        = vpfe_streamoff,
1635         .vidioc_g_pixelaspect    = vpfe_g_pixelaspect,
1636         .vidioc_g_selection      = vpfe_g_selection,
1637         .vidioc_s_selection      = vpfe_s_selection,
1638 };
1639 
1640 static struct vpfe_device *vpfe_initialize(void)
1641 {
1642         struct vpfe_device *vpfe_dev;
1643 
1644         /* Default number of buffers should be 3 */
1645         if ((numbuffers > 0) &&
1646             (numbuffers < config_params.min_numbuffers))
1647                 numbuffers = config_params.min_numbuffers;
1648 
1649         /*
1650          * Set buffer size to min buffers size if invalid buffer size is
1651          * given
1652          */
1653         if (bufsize < config_params.min_bufsize)
1654                 bufsize = config_params.min_bufsize;
1655 
1656         config_params.numbuffers = numbuffers;
1657 
1658         if (numbuffers)
1659                 config_params.device_bufsize = bufsize;
1660 
1661         /* Allocate memory for device objects */
1662         vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1663 
1664         return vpfe_dev;
1665 }
1666 
1667 /*
1668  * vpfe_probe : This function creates device entries by register
1669  * itself to the V4L2 driver and initializes fields of each
1670  * device objects
1671  */
1672 static int vpfe_probe(struct platform_device *pdev)
1673 {
1674         struct vpfe_subdev_info *sdinfo;
1675         struct vpfe_config *vpfe_cfg;
1676         struct resource *res1;
1677         struct vpfe_device *vpfe_dev;
1678         struct i2c_adapter *i2c_adap;
1679         struct video_device *vfd;
1680         int ret, i, j;
1681         int num_subdevs = 0;
1682 
1683         /* Get the pointer to the device object */
1684         vpfe_dev = vpfe_initialize();
1685 
1686         if (!vpfe_dev) {
1687                 v4l2_err(pdev->dev.driver,
1688                         "Failed to allocate memory for vpfe_dev\n");
1689                 return -ENOMEM;
1690         }
1691 
1692         vpfe_dev->pdev = &pdev->dev;
1693 
1694         if (!pdev->dev.platform_data) {
1695                 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1696                 ret = -ENODEV;
1697                 goto probe_free_dev_mem;
1698         }
1699 
1700         vpfe_cfg = pdev->dev.platform_data;
1701         vpfe_dev->cfg = vpfe_cfg;
1702         if (!vpfe_cfg->ccdc || !vpfe_cfg->card_name || !vpfe_cfg->sub_devs) {
1703                 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1704                 ret = -ENOENT;
1705                 goto probe_free_dev_mem;
1706         }
1707 
1708         /* Allocate memory for ccdc configuration */
1709         ccdc_cfg = kmalloc(sizeof(*ccdc_cfg), GFP_KERNEL);
1710         if (!ccdc_cfg) {
1711                 ret = -ENOMEM;
1712                 goto probe_free_dev_mem;
1713         }
1714 
1715         mutex_lock(&ccdc_lock);
1716 
1717         strscpy(ccdc_cfg->name, vpfe_cfg->ccdc, sizeof(ccdc_cfg->name));
1718         /* Get VINT0 irq resource */
1719         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1720         if (!res1) {
1721                 v4l2_err(pdev->dev.driver,
1722                          "Unable to get interrupt for VINT0\n");
1723                 ret = -ENODEV;
1724                 goto probe_free_ccdc_cfg_mem;
1725         }
1726         vpfe_dev->ccdc_irq0 = res1->start;
1727 
1728         /* Get VINT1 irq resource */
1729         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1730         if (!res1) {
1731                 v4l2_err(pdev->dev.driver,
1732                          "Unable to get interrupt for VINT1\n");
1733                 ret = -ENODEV;
1734                 goto probe_free_ccdc_cfg_mem;
1735         }
1736         vpfe_dev->ccdc_irq1 = res1->start;
1737 
1738         ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1739                           "vpfe_capture0", vpfe_dev);
1740 
1741         if (0 != ret) {
1742                 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1743                 goto probe_free_ccdc_cfg_mem;
1744         }
1745 
1746         vfd = &vpfe_dev->video_dev;
1747         /* Initialize field of video device */
1748         vfd->release            = video_device_release_empty;
1749         vfd->fops               = &vpfe_fops;
1750         vfd->ioctl_ops          = &vpfe_ioctl_ops;
1751         vfd->tvnorms            = 0;
1752         vfd->v4l2_dev           = &vpfe_dev->v4l2_dev;
1753         vfd->device_caps        = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1754         snprintf(vfd->name, sizeof(vfd->name),
1755                  "%s_V%d.%d.%d",
1756                  CAPTURE_DRV_NAME,
1757                  (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1758                  (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1759                  (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1760 
1761         ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1762         if (ret) {
1763                 v4l2_err(pdev->dev.driver,
1764                         "Unable to register v4l2 device.\n");
1765                 goto probe_out_release_irq;
1766         }
1767         v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1768         spin_lock_init(&vpfe_dev->irqlock);
1769         spin_lock_init(&vpfe_dev->dma_queue_lock);
1770         mutex_init(&vpfe_dev->lock);
1771 
1772         /* Initialize field of the device objects */
1773         vpfe_dev->numbuffers = config_params.numbuffers;
1774 
1775         /* register video device */
1776         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1777                 "trying to register vpfe device.\n");
1778         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1779                 "video_dev=%p\n", &vpfe_dev->video_dev);
1780         vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1781         ret = video_register_device(&vpfe_dev->video_dev,
1782                                     VFL_TYPE_GRABBER, -1);
1783 
1784         if (ret) {
1785                 v4l2_err(pdev->dev.driver,
1786                         "Unable to register video device.\n");
1787                 goto probe_out_v4l2_unregister;
1788         }
1789 
1790         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1791         /* set the driver data in platform device */
1792         platform_set_drvdata(pdev, vpfe_dev);
1793         /* set driver private data */
1794         video_set_drvdata(&vpfe_dev->video_dev, vpfe_dev);
1795         i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1796         num_subdevs = vpfe_cfg->num_subdevs;
1797         vpfe_dev->sd = kmalloc_array(num_subdevs,
1798                                      sizeof(*vpfe_dev->sd),
1799                                      GFP_KERNEL);
1800         if (!vpfe_dev->sd) {
1801                 ret = -ENOMEM;
1802                 goto probe_out_video_unregister;
1803         }
1804 
1805         for (i = 0; i < num_subdevs; i++) {
1806                 struct v4l2_input *inps;
1807 
1808                 sdinfo = &vpfe_cfg->sub_devs[i];
1809 
1810                 /* Load up the subdevice */
1811                 vpfe_dev->sd[i] =
1812                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1813                                                   i2c_adap,
1814                                                   &sdinfo->board_info,
1815                                                   NULL);
1816                 if (vpfe_dev->sd[i]) {
1817                         v4l2_info(&vpfe_dev->v4l2_dev,
1818                                   "v4l2 sub device %s registered\n",
1819                                   sdinfo->name);
1820                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1821                         /* update tvnorms from the sub devices */
1822                         for (j = 0; j < sdinfo->num_inputs; j++) {
1823                                 inps = &sdinfo->inputs[j];
1824                                 vfd->tvnorms |= inps->std;
1825                         }
1826                 } else {
1827                         v4l2_info(&vpfe_dev->v4l2_dev,
1828                                   "v4l2 sub device %s register fails\n",
1829                                   sdinfo->name);
1830                         ret = -ENXIO;
1831                         goto probe_sd_out;
1832                 }
1833         }
1834 
1835         /* set first sub device as current one */
1836         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1837         vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1838 
1839         /* We have at least one sub device to work with */
1840         mutex_unlock(&ccdc_lock);
1841         return 0;
1842 
1843 probe_sd_out:
1844         kfree(vpfe_dev->sd);
1845 probe_out_video_unregister:
1846         video_unregister_device(&vpfe_dev->video_dev);
1847 probe_out_v4l2_unregister:
1848         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1849 probe_out_release_irq:
1850         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1851 probe_free_ccdc_cfg_mem:
1852         kfree(ccdc_cfg);
1853         mutex_unlock(&ccdc_lock);
1854 probe_free_dev_mem:
1855         kfree(vpfe_dev);
1856         return ret;
1857 }
1858 
1859 /*
1860  * vpfe_remove : It un-register device from V4L2 driver
1861  */
1862 static int vpfe_remove(struct platform_device *pdev)
1863 {
1864         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
1865 
1866         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
1867 
1868         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1869         kfree(vpfe_dev->sd);
1870         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1871         video_unregister_device(&vpfe_dev->video_dev);
1872         kfree(vpfe_dev);
1873         kfree(ccdc_cfg);
1874         return 0;
1875 }
1876 
1877 static int vpfe_suspend(struct device *dev)
1878 {
1879         return 0;
1880 }
1881 
1882 static int vpfe_resume(struct device *dev)
1883 {
1884         return 0;
1885 }
1886 
1887 static const struct dev_pm_ops vpfe_dev_pm_ops = {
1888         .suspend = vpfe_suspend,
1889         .resume = vpfe_resume,
1890 };
1891 
1892 static struct platform_driver vpfe_driver = {
1893         .driver = {
1894                 .name = CAPTURE_DRV_NAME,
1895                 .pm = &vpfe_dev_pm_ops,
1896         },
1897         .probe = vpfe_probe,
1898         .remove = vpfe_remove,
1899 };
1900 
1901 module_platform_driver(vpfe_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/platform/davinci/vpfe_capture.c

DEFINITIONS
