drivers/media/video/davinci/vpif_display.c

   1 /*
   2  * vpif-display - VPIF display driver
   3  * Display driver for TI DaVinci VPIF
   4  *
   5  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation version 2.
  10  *
  11  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  12  * kind, whether express or implied; without even the implied warranty
  13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/mm.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/workqueue.h>
  25 #include <linux/string.h>
  26 #include <linux/videodev2.h>
  27 #include <linux/wait.h>
  28 #include <linux/time.h>
  29 #include <linux/i2c.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/io.h>
  32 #include <linux/slab.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/page.h>
  36
  37 #include <media/adv7343.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ioctl.h>
  40 #include <media/v4l2-chip-ident.h>
  41
  42 #include <mach/dm646x.h>
  43
  44 #include "vpif_display.h"
  45 #include "vpif.h"
  46
  47 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(VPIF_DISPLAY_VERSION);
  50
  51 #define DM646X_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  52
  53 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  54 #define vpif_dbg(level, debug, fmt, arg...)     \
  55                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  56
  57 static int debug = 1;
  58 static u32 ch2_numbuffers = 3;
  59 static u32 ch3_numbuffers = 3;
  60 static u32 ch2_bufsize = 1920 * 1080 * 2;
  61 static u32 ch3_bufsize = 720 * 576 * 2;
  62
  63 module_param(debug, int, 0644);
  64 module_param(ch2_numbuffers, uint, S_IRUGO);
  65 module_param(ch3_numbuffers, uint, S_IRUGO);
  66 module_param(ch2_bufsize, uint, S_IRUGO);
  67 module_param(ch3_bufsize, uint, S_IRUGO);
  68
  69 MODULE_PARM_DESC(debug, "Debug level 0-1");
  70 MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
  71 MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
  72 MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
  73 MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)");
  74
  75 static struct vpif_config_params config_params = {
  76         .min_numbuffers         = 3,
  77         .numbuffers[0]          = 3,
  78         .numbuffers[1]          = 3,
  79         .min_bufsize[0]         = 720 * 480 * 2,
  80         .min_bufsize[1]         = 720 * 480 * 2,
  81         .channel_bufsize[0]     = 1920 * 1080 * 2,
  82         .channel_bufsize[1]     = 720 * 576 * 2,
  83 };
  84
  85 static struct vpif_device vpif_obj = { {NULL} };
  86 static struct device *vpif_dev;
  87
  88 /*
  89  * vpif_uservirt_to_phys: This function is used to convert user
  90  * space virtual address to physical address.
  91  */
  92 static u32 vpif_uservirt_to_phys(u32 virtp)
  93 {
  94         struct mm_struct *mm = current->mm;
  95         unsigned long physp = 0;
  96         struct vm_area_struct *vma;
  97
  98         vma = find_vma(mm, virtp);
  99
 100         /* For kernel direct-mapped memory, take the easy way */
 101         if (virtp >= PAGE_OFFSET) {
 102                 physp = virt_to_phys((void *)virtp);
 103         } else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) {
 104                 /* this will catch, kernel-allocated, mmaped-to-usermode addr */
 105                 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
 106         } else {
 107                 /* otherwise, use get_user_pages() for general userland pages */
 108                 int res, nr_pages = 1;
 109                 struct page *pages;
 110                 down_read(&current->mm->mmap_sem);
 111
 112                 res = get_user_pages(current, current->mm,
 113                                      virtp, nr_pages, 1, 0, &pages, NULL);
 114                 up_read(&current->mm->mmap_sem);
 115
 116                 if (res == nr_pages) {
 117                         physp = __pa(page_address(&pages[0]) +
 118                                                         (virtp & ~PAGE_MASK));
 119                 } else {
 120                         vpif_err("get_user_pages failed\n");
 121                         return 0;
 122                 }
 123         }
 124
 125         return physp;
 126 }
 127
 128 /*
 129  * buffer_prepare: This is the callback function called from videobuf_qbuf()
 130  * function the buffer is prepared and user space virtual address is converted
 131  * into physical address
 132  */
 133 static int vpif_buffer_prepare(struct videobuf_queue *q,
 134                                struct videobuf_buffer *vb,
 135                                enum v4l2_field field)
 136 {
 137         struct vpif_fh *fh = q->priv_data;
 138         struct common_obj *common;
 139         unsigned long addr;
 140
 141         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 142         if (VIDEOBUF_NEEDS_INIT == vb->state) {
 143                 vb->width       = common->width;
 144                 vb->height      = common->height;
 145                 vb->size        = vb->width * vb->height;
 146                 vb->field       = field;
 147         }
 148         vb->state = VIDEOBUF_PREPARED;
 149
 150         /* if user pointer memory mechanism is used, get the physical
 151          * address of the buffer */
 152         if (V4L2_MEMORY_USERPTR == common->memory) {
 153                 if (!vb->baddr) {
 154                         vpif_err("buffer_address is 0\n");
 155                         return -EINVAL;
 156                 }
 157
 158                 vb->boff = vpif_uservirt_to_phys(vb->baddr);
 159                 if (!ISALIGNED(vb->boff))
 160                         goto buf_align_exit;
 161         }
 162
 163         addr = vb->boff;
 164         if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
 165                 if (!ISALIGNED(addr + common->ytop_off) ||
 166                     !ISALIGNED(addr + common->ybtm_off) ||
 167                     !ISALIGNED(addr + common->ctop_off) ||
 168                     !ISALIGNED(addr + common->cbtm_off))
 169                         goto buf_align_exit;
 170         }
 171         return 0;
 172
 173 buf_align_exit:
 174         vpif_err("buffer offset not aligned to 8 bytes\n");
 175         return -EINVAL;
 176 }
 177
 178 /*
 179  * vpif_buffer_setup: This function allocates memory for the buffers
 180  */
 181 static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
 182                                 unsigned int *size)
 183 {
 184         struct vpif_fh *fh = q->priv_data;
 185         struct channel_obj *ch = fh->channel;
 186         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 187
 188         if (V4L2_MEMORY_MMAP != common->memory)
 189                 return 0;
 190
 191         *size = config_params.channel_bufsize[ch->channel_id];
 192         if (*count < config_params.min_numbuffers)
 193                 *count = config_params.min_numbuffers;
 194
 195         return 0;
 196 }
 197
 198 /*
 199  * vpif_buffer_queue: This function adds the buffer to DMA queue
 200  */
 201 static void vpif_buffer_queue(struct videobuf_queue *q,
 202                               struct videobuf_buffer *vb)
 203 {
 204         struct vpif_fh *fh = q->priv_data;
 205         struct common_obj *common;
 206
 207         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 208
 209         /* add the buffer to the DMA queue */
 210         list_add_tail(&vb->queue, &common->dma_queue);
 211         vb->state = VIDEOBUF_QUEUED;
 212 }
 213
 214 /*
 215  * vpif_buffer_release: This function is called from the videobuf layer to
 216  * free memory allocated to the buffers
 217  */
 218 static void vpif_buffer_release(struct videobuf_queue *q,
 219                                 struct videobuf_buffer *vb)
 220 {
 221         struct vpif_fh *fh = q->priv_data;
 222         struct channel_obj *ch = fh->channel;
 223         struct common_obj *common;
 224         unsigned int buf_size = 0;
 225
 226         common = &ch->common[VPIF_VIDEO_INDEX];
 227
 228         videobuf_dma_contig_free(q, vb);
 229         vb->state = VIDEOBUF_NEEDS_INIT;
 230
 231         if (V4L2_MEMORY_MMAP != common->memory)
 232                 return;
 233
 234         buf_size = config_params.channel_bufsize[ch->channel_id];
 235 }
 236
 237 static struct videobuf_queue_ops video_qops = {
 238         .buf_setup      = vpif_buffer_setup,
 239         .buf_prepare    = vpif_buffer_prepare,
 240         .buf_queue      = vpif_buffer_queue,
 241         .buf_release    = vpif_buffer_release,
 242 };
 243 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 244
 245 static void process_progressive_mode(struct common_obj *common)
 246 {
 247         unsigned long addr = 0;
 248
 249         /* Get the next buffer from buffer queue */
 250         common->next_frm = list_entry(common->dma_queue.next,
 251                                 struct videobuf_buffer, queue);
 252         /* Remove that buffer from the buffer queue */
 253         list_del(&common->next_frm->queue);
 254         /* Mark status of the buffer as active */
 255         common->next_frm->state = VIDEOBUF_ACTIVE;
 256
 257         /* Set top and bottom field addrs in VPIF registers */
 258         addr = videobuf_to_dma_contig(common->next_frm);
 259         common->set_addr(addr + common->ytop_off,
 260                                  addr + common->ybtm_off,
 261                                  addr + common->ctop_off,
 262                                  addr + common->cbtm_off);
 263 }
 264
 265 static void process_interlaced_mode(int fid, struct common_obj *common)
 266 {
 267         /* device field id and local field id are in sync */
 268         /* If this is even field */
 269         if (0 == fid) {
 270                 if (common->cur_frm == common->next_frm)
 271                         return;
 272
 273                 /* one frame is displayed If next frame is
 274                  *  available, release cur_frm and move on */
 275                 /* Copy frame display time */
 276                 do_gettimeofday(&common->cur_frm->ts);
 277                 /* Change status of the cur_frm */
 278                 common->cur_frm->state = VIDEOBUF_DONE;
 279                 /* unlock semaphore on cur_frm */
 280                 wake_up_interruptible(&common->cur_frm->done);
 281                 /* Make cur_frm pointing to next_frm */
 282                 common->cur_frm = common->next_frm;
 283
 284         } else if (1 == fid) {  /* odd field */
 285                 if (list_empty(&common->dma_queue)
 286                     || (common->cur_frm != common->next_frm)) {
 287                         return;
 288                 }
 289                 /* one field is displayed configure the next
 290                  * frame if it is available else hold on current
 291                  * frame */
 292                 /* Get next from the buffer queue */
 293                 process_progressive_mode(common);
 294
 295         }
 296 }
 297
 298 /*
 299  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 300  * buffer from the queue and sets its address in VPIF registers
 301  */
 302 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 303 {
 304         struct vpif_device *dev = &vpif_obj;
 305         struct channel_obj *ch;
 306         struct common_obj *common;
 307         enum v4l2_field field;
 308         int fid = -1, i;
 309         int channel_id = 0;
 310
 311         channel_id = *(int *)(dev_id);
 312         ch = dev->dev[channel_id];
 313         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 314         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 315                 common = &ch->common[i];
 316                 /* If streaming is started in this channel */
 317                 if (0 == common->started)
 318                         continue;
 319
 320                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 321                         if (list_empty(&common->dma_queue))
 322                                 continue;
 323
 324                         /* Progressive mode */
 325                         if (!channel_first_int[i][channel_id]) {
 326                                 /* Mark status of the cur_frm to
 327                                  * done and unlock semaphore on it */
 328                                 do_gettimeofday(&common->cur_frm->ts);
 329                                 common->cur_frm->state = VIDEOBUF_DONE;
 330                                 wake_up_interruptible(&common->cur_frm->done);
 331                                 /* Make cur_frm pointing to next_frm */
 332                                 common->cur_frm = common->next_frm;
 333                         }
 334
 335                         channel_first_int[i][channel_id] = 0;
 336                         process_progressive_mode(common);
 337                 } else {
 338                         /* Interlaced mode */
 339                         /* If it is first interrupt, ignore it */
 340
 341                         if (channel_first_int[i][channel_id]) {
 342                                 channel_first_int[i][channel_id] = 0;
 343                                 continue;
 344                         }
 345
 346                         if (0 == i) {
 347                                 ch->field_id ^= 1;
 348                                 /* Get field id from VPIF registers */
 349                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 350                                 /* If fid does not match with stored field id */
 351                                 if (fid != ch->field_id) {
 352                                         /* Make them in sync */
 353                                         if (0 == fid)
 354                                                 ch->field_id = fid;
 355
 356                                         return IRQ_HANDLED;
 357                                 }
 358                         }
 359                         process_interlaced_mode(fid, common);
 360                 }
 361         }
 362
 363         return IRQ_HANDLED;
 364 }
 365
 366 static int vpif_update_std_info(struct channel_obj *ch)
 367 {
 368         struct video_obj *vid_ch = &ch->video;
 369         struct vpif_params *vpifparams = &ch->vpifparams;
 370         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 371         const struct vpif_channel_config_params *config;
 372
 373         int i;
 374
 375         for (i = 0; i < vpif_ch_params_count; i++) {
 376                 config = &ch_params[i];
 377                 if (config->hd_sd == 0) {
 378                         vpif_dbg(2, debug, "SD format\n");
 379                         if (config->stdid & vid_ch->stdid) {
 380                                 memcpy(std_info, config, sizeof(*config));
 381                                 break;
 382                         }
 383                 } else {
 384                         vpif_dbg(2, debug, "HD format\n");
 385                         if (config->dv_preset == vid_ch->dv_preset) {
 386                                 memcpy(std_info, config, sizeof(*config));
 387                                 break;
 388                         }
 389                 }
 390         }
 391
 392         if (i == vpif_ch_params_count) {
 393                 vpif_dbg(1, debug, "Format not found\n");
 394                 return -EINVAL;
 395         }
 396
 397         return 0;
 398 }
 399
 400 static int vpif_update_resolution(struct channel_obj *ch)
 401 {
 402         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 403         struct video_obj *vid_ch = &ch->video;
 404         struct vpif_params *vpifparams = &ch->vpifparams;
 405         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 406
 407         if (!vid_ch->stdid && !vid_ch->dv_preset && !vid_ch->bt_timings.height)
 408                 return -EINVAL;
 409
 410         if (vid_ch->stdid || vid_ch->dv_preset) {
 411                 if (vpif_update_std_info(ch))
 412                         return -EINVAL;
 413         }
 414
 415         common->fmt.fmt.pix.width = std_info->width;
 416         common->fmt.fmt.pix.height = std_info->height;
 417         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 418                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 419
 420         /* Set height and width paramateres */
 421         common->height = std_info->height;
 422         common->width = std_info->width;
 423
 424         return 0;
 425 }
 426
 427 /*
 428  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 429  * in the top and bottom field
 430  */
 431 static void vpif_calculate_offsets(struct channel_obj *ch)
 432 {
 433         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 434         struct vpif_params *vpifparams = &ch->vpifparams;
 435         enum v4l2_field field = common->fmt.fmt.pix.field;
 436         struct video_obj *vid_ch = &ch->video;
 437         unsigned int hpitch, vpitch, sizeimage;
 438
 439         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 440                 if (ch->vpifparams.std_info.frm_fmt)
 441                         vid_ch->buf_field = V4L2_FIELD_NONE;
 442                 else
 443                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 444         } else {
 445                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 446         }
 447
 448         if (V4L2_MEMORY_USERPTR == common->memory)
 449                 sizeimage = common->fmt.fmt.pix.sizeimage;
 450         else
 451                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 452
 453         hpitch = common->fmt.fmt.pix.bytesperline;
 454         vpitch = sizeimage / (hpitch * 2);
 455         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 456             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 457                 common->ytop_off = 0;
 458                 common->ybtm_off = hpitch;
 459                 common->ctop_off = sizeimage / 2;
 460                 common->cbtm_off = sizeimage / 2 + hpitch;
 461         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 462                 common->ytop_off = 0;
 463                 common->ybtm_off = sizeimage / 4;
 464                 common->ctop_off = sizeimage / 2;
 465                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 466         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 467                 common->ybtm_off = 0;
 468                 common->ytop_off = sizeimage / 4;
 469                 common->cbtm_off = sizeimage / 2;
 470                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 471         }
 472
 473         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 474             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 475                 vpifparams->video_params.storage_mode = 1;
 476         } else {
 477                 vpifparams->video_params.storage_mode = 0;
 478         }
 479
 480         if (ch->vpifparams.std_info.frm_fmt == 1) {
 481                 vpifparams->video_params.hpitch =
 482                     common->fmt.fmt.pix.bytesperline;
 483         } else {
 484                 if ((field == V4L2_FIELD_ANY) ||
 485                         (field == V4L2_FIELD_INTERLACED))
 486                         vpifparams->video_params.hpitch =
 487                             common->fmt.fmt.pix.bytesperline * 2;
 488                 else
 489                         vpifparams->video_params.hpitch =
 490                             common->fmt.fmt.pix.bytesperline;
 491         }
 492
 493         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 494 }
 495
 496 static void vpif_config_format(struct channel_obj *ch)
 497 {
 498         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 499
 500         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 501         if (config_params.numbuffers[ch->channel_id] == 0)
 502                 common->memory = V4L2_MEMORY_USERPTR;
 503         else
 504                 common->memory = V4L2_MEMORY_MMAP;
 505
 506         common->fmt.fmt.pix.sizeimage =
 507                         config_params.channel_bufsize[ch->channel_id];
 508         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 509         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 510 }
 511
 512 static int vpif_check_format(struct channel_obj *ch,
 513                              struct v4l2_pix_format *pixfmt)
 514 {
 515         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 516         enum v4l2_field field = pixfmt->field;
 517         u32 sizeimage, hpitch, vpitch;
 518
 519         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 520                 goto invalid_fmt_exit;
 521
 522         if (!(VPIF_VALID_FIELD(field)))
 523                 goto invalid_fmt_exit;
 524
 525         if (pixfmt->bytesperline <= 0)
 526                 goto invalid_pitch_exit;
 527
 528         if (V4L2_MEMORY_USERPTR == common->memory)
 529                 sizeimage = pixfmt->sizeimage;
 530         else
 531                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 532
 533         if (vpif_update_resolution(ch))
 534                 return -EINVAL;
 535
 536         hpitch = pixfmt->bytesperline;
 537         vpitch = sizeimage / (hpitch * 2);
 538
 539         /* Check for valid value of pitch */
 540         if ((hpitch < ch->vpifparams.std_info.width) ||
 541             (vpitch < ch->vpifparams.std_info.height))
 542                 goto invalid_pitch_exit;
 543
 544         /* Check for 8 byte alignment */
 545         if (!ISALIGNED(hpitch)) {
 546                 vpif_err("invalid pitch alignment\n");
 547                 return -EINVAL;
 548         }
 549         pixfmt->width = common->fmt.fmt.pix.width;
 550         pixfmt->height = common->fmt.fmt.pix.height;
 551
 552         return 0;
 553
 554 invalid_fmt_exit:
 555         vpif_err("invalid field format\n");
 556         return -EINVAL;
 557
 558 invalid_pitch_exit:
 559         vpif_err("invalid pitch\n");
 560         return -EINVAL;
 561 }
 562
 563 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 564 {
 565         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 566
 567         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 568                 common->set_addr = ch3_set_videobuf_addr;
 569         } else {
 570                 if (2 == muxmode)
 571                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 572                 else
 573                         common->set_addr = ch2_set_videobuf_addr;
 574         }
 575 }
 576
 577 /*
 578  * vpif_mmap: It is used to map kernel space buffers into user spaces
 579  */
 580 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 581 {
 582         struct vpif_fh *fh = filep->private_data;
 583         struct channel_obj *ch = fh->channel;
 584         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 585
 586         vpif_dbg(2, debug, "vpif_mmap\n");
 587
 588         return videobuf_mmap_mapper(&common->buffer_queue, vma);
 589 }
 590
 591 /*
 592  * vpif_poll: It is used for select/poll system call
 593  */
 594 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 595 {
 596         struct vpif_fh *fh = filep->private_data;
 597         struct channel_obj *ch = fh->channel;
 598         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 599
 600         if (common->started)
 601                 return videobuf_poll_stream(filep, &common->buffer_queue, wait);
 602
 603         return 0;
 604 }
 605
 606 /*
 607  * vpif_open: It creates object of file handle structure and stores it in
 608  * private_data member of filepointer
 609  */
 610 static int vpif_open(struct file *filep)
 611 {
 612         struct video_device *vdev = video_devdata(filep);
 613         struct channel_obj *ch = NULL;
 614         struct vpif_fh *fh = NULL;
 615
 616         ch = video_get_drvdata(vdev);
 617         /* Allocate memory for the file handle object */
 618         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 619         if (fh == NULL) {
 620                 vpif_err("unable to allocate memory for file handle object\n");
 621                 return -ENOMEM;
 622         }
 623
 624         /* store pointer to fh in private_data member of filep */
 625         filep->private_data = fh;
 626         fh->channel = ch;
 627         fh->initialized = 0;
 628         if (!ch->initialized) {
 629                 fh->initialized = 1;
 630                 ch->initialized = 1;
 631                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 632         }
 633
 634         /* Increment channel usrs counter */
 635         atomic_inc(&ch->usrs);
 636         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 637         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 638         /* Initialize priority of this instance to default priority */
 639         fh->prio = V4L2_PRIORITY_UNSET;
 640         v4l2_prio_open(&ch->prio, &fh->prio);
 641
 642         return 0;
 643 }
 644
 645 /*
 646  * vpif_release: This function deletes buffer queue, frees the buffers and
 647  * the vpif file handle
 648  */
 649 static int vpif_release(struct file *filep)
 650 {
 651         struct vpif_fh *fh = filep->private_data;
 652         struct channel_obj *ch = fh->channel;
 653         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 654
 655         /* if this instance is doing IO */
 656         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 657                 /* Reset io_usrs member of channel object */
 658                 common->io_usrs = 0;
 659                 /* Disable channel */
 660                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 661                         enable_channel2(0);
 662                         channel2_intr_enable(0);
 663                 }
 664                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 665                     (2 == common->started)) {
 666                         enable_channel3(0);
 667                         channel3_intr_enable(0);
 668                 }
 669                 common->started = 0;
 670                 /* Free buffers allocated */
 671                 videobuf_queue_cancel(&common->buffer_queue);
 672                 videobuf_mmap_free(&common->buffer_queue);
 673                 common->numbuffers =
 674                     config_params.numbuffers[ch->channel_id];
 675         }
 676
 677         /* Decrement channel usrs counter */
 678         atomic_dec(&ch->usrs);
 679         /* If this file handle has initialize encoder device, reset it */
 680         if (fh->initialized)
 681                 ch->initialized = 0;
 682
 683         /* Close the priority */
 684         v4l2_prio_close(&ch->prio, fh->prio);
 685         filep->private_data = NULL;
 686         fh->initialized = 0;
 687         kfree(fh);
 688
 689         return 0;
 690 }
 691
 692 /* functions implementing ioctls */
 693 /**
 694  * vpif_querycap() - QUERYCAP handler
 695  * @file: file ptr
 696  * @priv: file handle
 697  * @cap: ptr to v4l2_capability structure
 698  */
 699 static int vpif_querycap(struct file *file, void  *priv,
 700                                 struct v4l2_capability *cap)
 701 {
 702         struct vpif_display_config *config = vpif_dev->platform_data;
 703
 704         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 705         strlcpy(cap->driver, "vpif display", sizeof(cap->driver));
 706         strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info));
 707         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 708
 709         return 0;
 710 }
 711
 712 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 713                                         struct v4l2_fmtdesc *fmt)
 714 {
 715         if (fmt->index != 0) {
 716                 vpif_err("Invalid format index\n");
 717                 return -EINVAL;
 718         }
 719
 720         /* Fill in the information about format */
 721         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 722         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 723         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 724
 725         return 0;
 726 }
 727
 728 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 729                                 struct v4l2_format *fmt)
 730 {
 731         struct vpif_fh *fh = priv;
 732         struct channel_obj *ch = fh->channel;
 733         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 734
 735         /* Check the validity of the buffer type */
 736         if (common->fmt.type != fmt->type)
 737                 return -EINVAL;
 738
 739         if (vpif_update_resolution(ch))
 740                 return -EINVAL;
 741         *fmt = common->fmt;
 742         return 0;
 743 }
 744
 745 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 746                                 struct v4l2_format *fmt)
 747 {
 748         struct vpif_fh *fh = priv;
 749         struct v4l2_pix_format *pixfmt;
 750         struct channel_obj *ch = fh->channel;
 751         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 752         int ret = 0;
 753
 754         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 755             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 756                 if (!fh->initialized) {
 757                         vpif_dbg(1, debug, "Channel Busy\n");
 758                         return -EBUSY;
 759                 }
 760
 761                 /* Check for the priority */
 762                 ret = v4l2_prio_check(&ch->prio, fh->prio);
 763                 if (0 != ret)
 764                         return ret;
 765                 fh->initialized = 1;
 766         }
 767
 768         if (common->started) {
 769                 vpif_dbg(1, debug, "Streaming in progress\n");
 770                 return -EBUSY;
 771         }
 772
 773         pixfmt = &fmt->fmt.pix;
 774         /* Check for valid field format */
 775         ret = vpif_check_format(ch, pixfmt);
 776         if (ret)
 777                 return ret;
 778
 779         /* store the pix format in the channel object */
 780         common->fmt.fmt.pix = *pixfmt;
 781         /* store the format in the channel object */
 782         common->fmt = *fmt;
 783         return 0;
 784 }
 785
 786 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 787                                 struct v4l2_format *fmt)
 788 {
 789         struct vpif_fh *fh = priv;
 790         struct channel_obj *ch = fh->channel;
 791         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 792         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 793         int ret = 0;
 794
 795         ret = vpif_check_format(ch, pixfmt);
 796         if (ret) {
 797                 *pixfmt = common->fmt.fmt.pix;
 798                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 799         }
 800
 801         return ret;
 802 }
 803
 804 static int vpif_reqbufs(struct file *file, void *priv,
 805                         struct v4l2_requestbuffers *reqbuf)
 806 {
 807         struct vpif_fh *fh = priv;
 808         struct channel_obj *ch = fh->channel;
 809         struct common_obj *common;
 810         enum v4l2_field field;
 811         u8 index = 0;
 812
 813         /* This file handle has not initialized the channel,
 814            It is not allowed to do settings */
 815         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 816             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 817                 if (!fh->initialized) {
 818                         vpif_err("Channel Busy\n");
 819                         return -EBUSY;
 820                 }
 821         }
 822
 823         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 824                 return -EINVAL;
 825
 826         index = VPIF_VIDEO_INDEX;
 827
 828         common = &ch->common[index];
 829
 830         if (common->fmt.type != reqbuf->type)
 831                 return -EINVAL;
 832
 833         if (0 != common->io_usrs)
 834                 return -EBUSY;
 835
 836         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 837                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 838                         field = V4L2_FIELD_INTERLACED;
 839                 else
 840                         field = common->fmt.fmt.pix.field;
 841         } else {
 842                 field = V4L2_VBI_INTERLACED;
 843         }
 844
 845         /* Initialize videobuf queue as per the buffer type */
 846         videobuf_queue_dma_contig_init(&common->buffer_queue,
 847                                             &video_qops, NULL,
 848                                             &common->irqlock,
 849                                             reqbuf->type, field,
 850                                             sizeof(struct videobuf_buffer), fh,
 851                                             &common->lock);
 852
 853         /* Set io allowed member of file handle to TRUE */
 854         fh->io_allowed[index] = 1;
 855         /* Increment io usrs member of channel object to 1 */
 856         common->io_usrs = 1;
 857         /* Store type of memory requested in channel object */
 858         common->memory = reqbuf->memory;
 859         INIT_LIST_HEAD(&common->dma_queue);
 860
 861         /* Allocate buffers */
 862         return videobuf_reqbufs(&common->buffer_queue, reqbuf);
 863 }
 864
 865 static int vpif_querybuf(struct file *file, void *priv,
 866                                 struct v4l2_buffer *tbuf)
 867 {
 868         struct vpif_fh *fh = priv;
 869         struct channel_obj *ch = fh->channel;
 870         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 871
 872         if (common->fmt.type != tbuf->type)
 873                 return -EINVAL;
 874
 875         return videobuf_querybuf(&common->buffer_queue, tbuf);
 876 }
 877
 878 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 879 {
 880
 881         struct vpif_fh *fh = priv;
 882         struct channel_obj *ch = fh->channel;
 883         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 884         struct v4l2_buffer tbuf = *buf;
 885         struct videobuf_buffer *buf1;
 886         unsigned long addr = 0;
 887         unsigned long flags;
 888         int ret = 0;
 889
 890         if (common->fmt.type != tbuf.type)
 891                 return -EINVAL;
 892
 893         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
 894                 vpif_err("fh->io_allowed\n");
 895                 return -EACCES;
 896         }
 897
 898         if (!(list_empty(&common->dma_queue)) ||
 899             (common->cur_frm != common->next_frm) ||
 900             !(common->started) ||
 901             (common->started && (0 == ch->field_id)))
 902                 return videobuf_qbuf(&common->buffer_queue, buf);
 903
 904         /* bufferqueue is empty store buffer address in VPIF registers */
 905         mutex_lock(&common->buffer_queue.vb_lock);
 906         buf1 = common->buffer_queue.bufs[tbuf.index];
 907         if (buf1->memory != tbuf.memory) {
 908                 vpif_err("invalid buffer type\n");
 909                 goto qbuf_exit;
 910         }
 911
 912         if ((buf1->state == VIDEOBUF_QUEUED) ||
 913             (buf1->state == VIDEOBUF_ACTIVE)) {
 914                 vpif_err("invalid state\n");
 915                 goto qbuf_exit;
 916         }
 917
 918         switch (buf1->memory) {
 919         case V4L2_MEMORY_MMAP:
 920                 if (buf1->baddr == 0)
 921                         goto qbuf_exit;
 922                 break;
 923
 924         case V4L2_MEMORY_USERPTR:
 925                 if (tbuf.length < buf1->bsize)
 926                         goto qbuf_exit;
 927
 928                 if ((VIDEOBUF_NEEDS_INIT != buf1->state)
 929                             && (buf1->baddr != tbuf.m.userptr)) {
 930                         vpif_buffer_release(&common->buffer_queue, buf1);
 931                         buf1->baddr = tbuf.m.userptr;
 932                 }
 933                 break;
 934
 935         default:
 936                 goto qbuf_exit;
 937         }
 938
 939         local_irq_save(flags);
 940         ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
 941                                         common->buffer_queue.field);
 942         if (ret < 0) {
 943                 local_irq_restore(flags);
 944                 goto qbuf_exit;
 945         }
 946
 947         buf1->state = VIDEOBUF_ACTIVE;
 948         addr = buf1->boff;
 949         common->next_frm = buf1;
 950         if (tbuf.type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
 951                 common->set_addr((addr + common->ytop_off),
 952                                  (addr + common->ybtm_off),
 953                                  (addr + common->ctop_off),
 954                                  (addr + common->cbtm_off));
 955         }
 956
 957         local_irq_restore(flags);
 958         list_add_tail(&buf1->stream, &common->buffer_queue.stream);
 959         mutex_unlock(&common->buffer_queue.vb_lock);
 960         return 0;
 961
 962 qbuf_exit:
 963         mutex_unlock(&common->buffer_queue.vb_lock);
 964         return -EINVAL;
 965 }
 966
 967 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
 968 {
 969         struct vpif_fh *fh = priv;
 970         struct channel_obj *ch = fh->channel;
 971         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 972         int ret = 0;
 973
 974         if (!(*std_id & DM646X_V4L2_STD))
 975                 return -EINVAL;
 976
 977         if (common->started) {
 978                 vpif_err("streaming in progress\n");
 979                 return -EBUSY;
 980         }
 981
 982         /* Call encoder subdevice function to set the standard */
 983         ch->video.stdid = *std_id;
 984         ch->video.dv_preset = V4L2_DV_INVALID;
 985         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
 986
 987         /* Get the information about the standard */
 988         if (vpif_update_resolution(ch))
 989                 return -EINVAL;
 990
 991         if ((ch->vpifparams.std_info.width *
 992                 ch->vpifparams.std_info.height * 2) >
 993                 config_params.channel_bufsize[ch->channel_id]) {
 994                 vpif_err("invalid std for this size\n");
 995                 return -EINVAL;
 996         }
 997
 998         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
 999         /* Configure the default format information */
1000         vpif_config_format(ch);
1001
1002         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1003                                                 s_std_output, *std_id);
1004         if (ret < 0) {
1005                 vpif_err("Failed to set output standard\n");
1006                 return ret;
1007         }
1008
1009         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1010                                                         s_std, *std_id);
1011         if (ret < 0)
1012                 vpif_err("Failed to set standard for sub devices\n");
1013         return ret;
1014 }
1015
1016 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1017 {
1018         struct vpif_fh *fh = priv;
1019         struct channel_obj *ch = fh->channel;
1020
1021         *std = ch->video.stdid;
1022         return 0;
1023 }
1024
1025 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1026 {
1027         struct vpif_fh *fh = priv;
1028         struct channel_obj *ch = fh->channel;
1029         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1030
1031         return videobuf_dqbuf(&common->buffer_queue, p,
1032                                         (file->f_flags & O_NONBLOCK));
1033 }
1034
1035 static int vpif_streamon(struct file *file, void *priv,
1036                                 enum v4l2_buf_type buftype)
1037 {
1038         struct vpif_fh *fh = priv;
1039         struct channel_obj *ch = fh->channel;
1040         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1041         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1042         struct vpif_params *vpif = &ch->vpifparams;
1043         struct vpif_display_config *vpif_config_data =
1044                                         vpif_dev->platform_data;
1045         unsigned long addr = 0;
1046         int ret = 0;
1047
1048         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1049                 vpif_err("buffer type not supported\n");
1050                 return -EINVAL;
1051         }
1052
1053         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1054                 vpif_err("fh->io_allowed\n");
1055                 return -EACCES;
1056         }
1057
1058         /* If Streaming is already started, return error */
1059         if (common->started) {
1060                 vpif_err("channel->started\n");
1061                 return -EBUSY;
1062         }
1063
1064         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1065                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1066                 ch->vpifparams.std_info.ycmux_mode == 0)
1067                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1068                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1069                 vpif_err("other channel is using\n");
1070                 return -EBUSY;
1071         }
1072
1073         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1074         if (ret < 0)
1075                 return ret;
1076
1077         /* Call videobuf_streamon to start streaming in videobuf */
1078         ret = videobuf_streamon(&common->buffer_queue);
1079         if (ret < 0) {
1080                 vpif_err("videobuf_streamon\n");
1081                 return ret;
1082         }
1083
1084         /* If buffer queue is empty, return error */
1085         if (list_empty(&common->dma_queue)) {
1086                 vpif_err("buffer queue is empty\n");
1087                 return -EIO;
1088         }
1089
1090         /* Get the next frame from the buffer queue */
1091         common->next_frm = common->cur_frm =
1092                             list_entry(common->dma_queue.next,
1093                                        struct videobuf_buffer, queue);
1094
1095         list_del(&common->cur_frm->queue);
1096         /* Mark state of the current frame to active */
1097         common->cur_frm->state = VIDEOBUF_ACTIVE;
1098
1099         /* Initialize field_id and started member */
1100         ch->field_id = 0;
1101         common->started = 1;
1102         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1103                 addr = common->cur_frm->boff;
1104                 /* Calculate the offset for Y and C data  in the buffer */
1105                 vpif_calculate_offsets(ch);
1106
1107                 if ((ch->vpifparams.std_info.frm_fmt &&
1108                         ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
1109                         && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
1110                         || (!ch->vpifparams.std_info.frm_fmt
1111                         && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
1112                         vpif_err("conflict in field format and std format\n");
1113                         return -EINVAL;
1114                 }
1115
1116                 /* clock settings */
1117                 ret =
1118                  vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
1119                                                 ch->vpifparams.std_info.hd_sd);
1120                 if (ret < 0) {
1121                         vpif_err("can't set clock\n");
1122                         return ret;
1123                 }
1124
1125                 /* set the parameters and addresses */
1126                 ret = vpif_set_video_params(vpif, ch->channel_id + 2);
1127                 if (ret < 0)
1128                         return ret;
1129
1130                 common->started = ret;
1131                 vpif_config_addr(ch, ret);
1132                 common->set_addr((addr + common->ytop_off),
1133                                  (addr + common->ybtm_off),
1134                                  (addr + common->ctop_off),
1135                                  (addr + common->cbtm_off));
1136
1137                 /* Set interrupt for both the fields in VPIF
1138                    Register enable channel in VPIF register */
1139                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1140                         channel2_intr_assert();
1141                         channel2_intr_enable(1);
1142                         enable_channel2(1);
1143                 }
1144
1145                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
1146                         || (common->started == 2)) {
1147                         channel3_intr_assert();
1148                         channel3_intr_enable(1);
1149                         enable_channel3(1);
1150                 }
1151                 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
1152         }
1153         return ret;
1154 }
1155
1156 static int vpif_streamoff(struct file *file, void *priv,
1157                                 enum v4l2_buf_type buftype)
1158 {
1159         struct vpif_fh *fh = priv;
1160         struct channel_obj *ch = fh->channel;
1161         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1162
1163         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1164                 vpif_err("buffer type not supported\n");
1165                 return -EINVAL;
1166         }
1167
1168         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1169                 vpif_err("fh->io_allowed\n");
1170                 return -EACCES;
1171         }
1172
1173         if (!common->started) {
1174                 vpif_err("channel->started\n");
1175                 return -EINVAL;
1176         }
1177
1178         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1179                 /* disable channel */
1180                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1181                         enable_channel2(0);
1182                         channel2_intr_enable(0);
1183                 }
1184                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1185                                         (2 == common->started)) {
1186                         enable_channel3(0);
1187                         channel3_intr_enable(0);
1188                 }
1189         }
1190
1191         common->started = 0;
1192         return videobuf_streamoff(&common->buffer_queue);
1193 }
1194
1195 static int vpif_cropcap(struct file *file, void *priv,
1196                         struct v4l2_cropcap *crop)
1197 {
1198         struct vpif_fh *fh = priv;
1199         struct channel_obj *ch = fh->channel;
1200         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1201         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1202                 return -EINVAL;
1203
1204         crop->bounds.left = crop->bounds.top = 0;
1205         crop->defrect.left = crop->defrect.top = 0;
1206         crop->defrect.height = crop->bounds.height = common->height;
1207         crop->defrect.width = crop->bounds.width = common->width;
1208
1209         return 0;
1210 }
1211
1212 static int vpif_enum_output(struct file *file, void *fh,
1213                                 struct v4l2_output *output)
1214 {
1215
1216         struct vpif_display_config *config = vpif_dev->platform_data;
1217
1218         if (output->index >= config->output_count) {
1219                 vpif_dbg(1, debug, "Invalid output index\n");
1220                 return -EINVAL;
1221         }
1222
1223         strcpy(output->name, config->output[output->index]);
1224         output->type = V4L2_OUTPUT_TYPE_ANALOG;
1225         output->std = DM646X_V4L2_STD;
1226
1227         return 0;
1228 }
1229
1230 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1231 {
1232         struct vpif_fh *fh = priv;
1233         struct channel_obj *ch = fh->channel;
1234         struct video_obj *vid_ch = &ch->video;
1235         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1236         int ret = 0;
1237
1238         if (common->started) {
1239                 vpif_err("Streaming in progress\n");
1240                 return -EBUSY;
1241         }
1242
1243         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1244                                                         s_routing, 0, i, 0);
1245
1246         if (ret < 0)
1247                 vpif_err("Failed to set output standard\n");
1248
1249         vid_ch->output_id = i;
1250         return ret;
1251 }
1252
1253 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1254 {
1255         struct vpif_fh *fh = priv;
1256         struct channel_obj *ch = fh->channel;
1257         struct video_obj *vid_ch = &ch->video;
1258
1259         *i = vid_ch->output_id;
1260
1261         return 0;
1262 }
1263
1264 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1265 {
1266         struct vpif_fh *fh = priv;
1267         struct channel_obj *ch = fh->channel;
1268
1269         *p = v4l2_prio_max(&ch->prio);
1270
1271         return 0;
1272 }
1273
1274 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1275 {
1276         struct vpif_fh *fh = priv;
1277         struct channel_obj *ch = fh->channel;
1278
1279         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1280 }
1281
1282 /**
1283  * vpif_enum_dv_presets() - ENUM_DV_PRESETS handler
1284  * @file: file ptr
1285  * @priv: file handle
1286  * @preset: input preset
1287  */
1288 static int vpif_enum_dv_presets(struct file *file, void *priv,
1289                 struct v4l2_dv_enum_preset *preset)
1290 {
1291         struct vpif_fh *fh = priv;
1292         struct channel_obj *ch = fh->channel;
1293         struct video_obj *vid_ch = &ch->video;
1294
1295         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1296                         video, enum_dv_presets, preset);
1297 }
1298
1299 /**
1300  * vpif_s_dv_presets() - S_DV_PRESETS handler
1301  * @file: file ptr
1302  * @priv: file handle
1303  * @preset: input preset
1304  */
1305 static int vpif_s_dv_preset(struct file *file, void *priv,
1306                 struct v4l2_dv_preset *preset)
1307 {
1308         struct vpif_fh *fh = priv;
1309         struct channel_obj *ch = fh->channel;
1310         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1311         struct video_obj *vid_ch = &ch->video;
1312         int ret = 0;
1313
1314         if (common->started) {
1315                 vpif_dbg(1, debug, "streaming in progress\n");
1316                 return -EBUSY;
1317         }
1318
1319         ret = v4l2_prio_check(&ch->prio, fh->prio);
1320         if (ret != 0)
1321                 return ret;
1322
1323         fh->initialized = 1;
1324
1325         /* Call encoder subdevice function to set the standard */
1326         if (mutex_lock_interruptible(&common->lock))
1327                 return -ERESTARTSYS;
1328
1329         ch->video.dv_preset = preset->preset;
1330         ch->video.stdid = V4L2_STD_UNKNOWN;
1331         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
1332
1333         /* Get the information about the standard */
1334         if (vpif_update_resolution(ch)) {
1335                 ret = -EINVAL;
1336         } else {
1337                 /* Configure the default format information */
1338                 vpif_config_format(ch);
1339
1340                 ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1341                                 video, s_dv_preset, preset);
1342         }
1343
1344         mutex_unlock(&common->lock);
1345
1346         return ret;
1347 }
1348 /**
1349  * vpif_g_dv_presets() - G_DV_PRESETS handler
1350  * @file: file ptr
1351  * @priv: file handle
1352  * @preset: input preset
1353  */
1354 static int vpif_g_dv_preset(struct file *file, void *priv,
1355                 struct v4l2_dv_preset *preset)
1356 {
1357         struct vpif_fh *fh = priv;
1358         struct channel_obj *ch = fh->channel;
1359
1360         preset->preset = ch->video.dv_preset;
1361
1362         return 0;
1363 }
1364 /**
1365  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1366  * @file: file ptr
1367  * @priv: file handle
1368  * @timings: digital video timings
1369  */
1370 static int vpif_s_dv_timings(struct file *file, void *priv,
1371                 struct v4l2_dv_timings *timings)
1372 {
1373         struct vpif_fh *fh = priv;
1374         struct channel_obj *ch = fh->channel;
1375         struct vpif_params *vpifparams = &ch->vpifparams;
1376         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1377         struct video_obj *vid_ch = &ch->video;
1378         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1379         int ret;
1380
1381         if (timings->type != V4L2_DV_BT_656_1120) {
1382                 vpif_dbg(2, debug, "Timing type not defined\n");
1383                 return -EINVAL;
1384         }
1385
1386         /* Configure subdevice timings, if any */
1387         ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1388                         video, s_dv_timings, timings);
1389         if (ret == -ENOIOCTLCMD) {
1390                 vpif_dbg(2, debug, "Custom DV timings not supported by "
1391                                 "subdevice\n");
1392                 return -EINVAL;
1393         }
1394         if (ret < 0) {
1395                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1396                 return ret;
1397         }
1398
1399         if (!(timings->bt.width && timings->bt.height &&
1400                                 (timings->bt.hbackporch ||
1401                                  timings->bt.hfrontporch ||
1402                                  timings->bt.hsync) &&
1403                                 timings->bt.vfrontporch &&
1404                                 (timings->bt.vbackporch ||
1405                                  timings->bt.vsync))) {
1406                 vpif_dbg(2, debug, "Timings for width, height, "
1407                                 "horizontal back porch, horizontal sync, "
1408                                 "horizontal front porch, vertical back porch, "
1409                                 "vertical sync and vertical back porch "
1410                                 "must be defined\n");
1411                 return -EINVAL;
1412         }
1413
1414         *bt = timings->bt;
1415
1416         /* Configure video port timings */
1417
1418         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1419                 bt->hsync - 8;
1420         std_info->sav2eav = bt->width;
1421
1422         std_info->l1 = 1;
1423         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1424
1425         if (bt->interlaced) {
1426                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1427                         std_info->vsize = bt->height * 2 +
1428                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1429                                 bt->il_vfrontporch + bt->il_vsync +
1430                                 bt->il_vbackporch;
1431                         std_info->l5 = std_info->vsize/2 -
1432                                 (bt->vfrontporch - 1);
1433                         std_info->l7 = std_info->vsize/2 + 1;
1434                         std_info->l9 = std_info->l7 + bt->il_vsync +
1435                                 bt->il_vbackporch + 1;
1436                         std_info->l11 = std_info->vsize -
1437                                 (bt->il_vfrontporch - 1);
1438                 } else {
1439                         vpif_dbg(2, debug, "Required timing values for "
1440                                         "interlaced BT format missing\n");
1441                         return -EINVAL;
1442                 }
1443         } else {
1444                 std_info->vsize = bt->height + bt->vfrontporch +
1445                         bt->vsync + bt->vbackporch;
1446                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1447         }
1448         strncpy(std_info->name, "Custom timings BT656/1120",
1449                         VPIF_MAX_NAME);
1450         std_info->width = bt->width;
1451         std_info->height = bt->height;
1452         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1453         std_info->ycmux_mode = 0;
1454         std_info->capture_format = 0;
1455         std_info->vbi_supported = 0;
1456         std_info->hd_sd = 1;
1457         std_info->stdid = 0;
1458         std_info->dv_preset = V4L2_DV_INVALID;
1459
1460         vid_ch->stdid = 0;
1461         vid_ch->dv_preset = V4L2_DV_INVALID;
1462
1463         return 0;
1464 }
1465
1466 /**
1467  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1468  * @file: file ptr
1469  * @priv: file handle
1470  * @timings: digital video timings
1471  */
1472 static int vpif_g_dv_timings(struct file *file, void *priv,
1473                 struct v4l2_dv_timings *timings)
1474 {
1475         struct vpif_fh *fh = priv;
1476         struct channel_obj *ch = fh->channel;
1477         struct video_obj *vid_ch = &ch->video;
1478         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1479
1480         timings->bt = *bt;
1481
1482         return 0;
1483 }
1484
1485 /*
1486  * vpif_g_chip_ident() - Identify the chip
1487  * @file: file ptr
1488  * @priv: file handle
1489  * @chip: chip identity
1490  *
1491  * Returns zero or -EINVAL if read operations fails.
1492  */
1493 static int vpif_g_chip_ident(struct file *file, void *priv,
1494                 struct v4l2_dbg_chip_ident *chip)
1495 {
1496         chip->ident = V4L2_IDENT_NONE;
1497         chip->revision = 0;
1498         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1499                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1500                 vpif_dbg(2, debug, "match_type is invalid.\n");
1501                 return -EINVAL;
1502         }
1503
1504         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1505                         g_chip_ident, chip);
1506 }
1507
1508 #ifdef CONFIG_VIDEO_ADV_DEBUG
1509 /*
1510  * vpif_dbg_g_register() - Read register
1511  * @file: file ptr
1512  * @priv: file handle
1513  * @reg: register to be read
1514  *
1515  * Debugging only
1516  * Returns zero or -EINVAL if read operations fails.
1517  */
1518 static int vpif_dbg_g_register(struct file *file, void *priv,
1519                 struct v4l2_dbg_register *reg){
1520         struct vpif_fh *fh = priv;
1521         struct channel_obj *ch = fh->channel;
1522         struct video_obj *vid_ch = &ch->video;
1523
1524         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1525                         g_register, reg);
1526 }
1527
1528 /*
1529  * vpif_dbg_s_register() - Write to register
1530  * @file: file ptr
1531  * @priv: file handle
1532  * @reg: register to be modified
1533  *
1534  * Debugging only
1535  * Returns zero or -EINVAL if write operations fails.
1536  */
1537 static int vpif_dbg_s_register(struct file *file, void *priv,
1538                 struct v4l2_dbg_register *reg){
1539         struct vpif_fh *fh = priv;
1540         struct channel_obj *ch = fh->channel;
1541         struct video_obj *vid_ch = &ch->video;
1542
1543         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1544                         s_register, reg);
1545 }
1546 #endif
1547
1548 /*
1549  * vpif_log_status() - Status information
1550  * @file: file ptr
1551  * @priv: file handle
1552  *
1553  * Returns zero.
1554  */
1555 static int vpif_log_status(struct file *filep, void *priv)
1556 {
1557         /* status for sub devices */
1558         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1559
1560         return 0;
1561 }
1562
1563 /* vpif display ioctl operations */
1564 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1565         .vidioc_querycap                = vpif_querycap,
1566         .vidioc_g_priority              = vpif_g_priority,
1567         .vidioc_s_priority              = vpif_s_priority,
1568         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1569         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1570         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1571         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1572         .vidioc_reqbufs                 = vpif_reqbufs,
1573         .vidioc_querybuf                = vpif_querybuf,
1574         .vidioc_qbuf                    = vpif_qbuf,
1575         .vidioc_dqbuf                   = vpif_dqbuf,
1576         .vidioc_streamon                = vpif_streamon,
1577         .vidioc_streamoff               = vpif_streamoff,
1578         .vidioc_s_std                   = vpif_s_std,
1579         .vidioc_g_std                   = vpif_g_std,
1580         .vidioc_enum_output             = vpif_enum_output,
1581         .vidioc_s_output                = vpif_s_output,
1582         .vidioc_g_output                = vpif_g_output,
1583         .vidioc_cropcap                 = vpif_cropcap,
1584         .vidioc_enum_dv_presets         = vpif_enum_dv_presets,
1585         .vidioc_s_dv_preset             = vpif_s_dv_preset,
1586         .vidioc_g_dv_preset             = vpif_g_dv_preset,
1587         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1588         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1589         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1590 #ifdef CONFIG_VIDEO_ADV_DEBUG
1591         .vidioc_g_register              = vpif_dbg_g_register,
1592         .vidioc_s_register              = vpif_dbg_s_register,
1593 #endif
1594         .vidioc_log_status              = vpif_log_status,
1595 };
1596
1597 static const struct v4l2_file_operations vpif_fops = {
1598         .owner          = THIS_MODULE,
1599         .open           = vpif_open,
1600         .release        = vpif_release,
1601         .unlocked_ioctl = video_ioctl2,
1602         .mmap           = vpif_mmap,
1603         .poll           = vpif_poll
1604 };
1605
1606 static struct video_device vpif_video_template = {
1607         .name           = "vpif",
1608         .fops           = &vpif_fops,
1609         .ioctl_ops      = &vpif_ioctl_ops,
1610         .tvnorms        = DM646X_V4L2_STD,
1611         .current_norm   = V4L2_STD_625_50,
1612
1613 };
1614
1615 /*Configure the channels, buffer sizei, request irq */
1616 static int initialize_vpif(void)
1617 {
1618         int free_channel_objects_index;
1619         int free_buffer_channel_index;
1620         int free_buffer_index;
1621         int err = 0, i, j;
1622
1623         /* Default number of buffers should be 3 */
1624         if ((ch2_numbuffers > 0) &&
1625             (ch2_numbuffers < config_params.min_numbuffers))
1626                 ch2_numbuffers = config_params.min_numbuffers;
1627         if ((ch3_numbuffers > 0) &&
1628             (ch3_numbuffers < config_params.min_numbuffers))
1629                 ch3_numbuffers = config_params.min_numbuffers;
1630
1631         /* Set buffer size to min buffers size if invalid buffer size is
1632          * given */
1633         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1634                 ch2_bufsize =
1635                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1636         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1637                 ch3_bufsize =
1638                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1639
1640         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1641
1642         if (ch2_numbuffers) {
1643                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1644                                                         ch2_bufsize;
1645         }
1646         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1647
1648         if (ch3_numbuffers) {
1649                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1650                                                         ch3_bufsize;
1651         }
1652
1653         /* Allocate memory for six channel objects */
1654         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1655                 vpif_obj.dev[i] =
1656                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1657                 /* If memory allocation fails, return error */
1658                 if (!vpif_obj.dev[i]) {
1659                         free_channel_objects_index = i;
1660                         err = -ENOMEM;
1661                         goto vpif_init_free_channel_objects;
1662                 }
1663         }
1664
1665         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1666         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1667         free_buffer_index = config_params.numbuffers[i - 1];
1668
1669         return 0;
1670
1671 vpif_init_free_channel_objects:
1672         for (j = 0; j < free_channel_objects_index; j++)
1673                 kfree(vpif_obj.dev[j]);
1674         return err;
1675 }
1676
1677 /*
1678  * vpif_probe: This function creates device entries by register itself to the
1679  * V4L2 driver and initializes fields of each channel objects
1680  */
1681 static __init int vpif_probe(struct platform_device *pdev)
1682 {
1683         struct vpif_subdev_info *subdevdata;
1684         struct vpif_display_config *config;
1685         int i, j = 0, k, q, m, err = 0;
1686         struct i2c_adapter *i2c_adap;
1687         struct common_obj *common;
1688         struct channel_obj *ch;
1689         struct video_device *vfd;
1690         struct resource *res;
1691         int subdev_count;
1692
1693         vpif_dev = &pdev->dev;
1694
1695         err = initialize_vpif();
1696
1697         if (err) {
1698                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1699                 return err;
1700         }
1701
1702         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1703         if (err) {
1704                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1705                 return err;
1706         }
1707
1708         k = 0;
1709         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1710                 for (i = res->start; i <= res->end; i++) {
1711                         if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
1712                                         "DM646x_Display",
1713                                 (void *)(&vpif_obj.dev[k]->channel_id))) {
1714                                 err = -EBUSY;
1715                                 goto vpif_int_err;
1716                         }
1717                 }
1718                 k++;
1719         }
1720
1721         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1722
1723                 /* Get the pointer to the channel object */
1724                 ch = vpif_obj.dev[i];
1725
1726                 /* Allocate memory for video device */
1727                 vfd = video_device_alloc();
1728                 if (vfd == NULL) {
1729                         for (j = 0; j < i; j++) {
1730                                 ch = vpif_obj.dev[j];
1731                                 video_device_release(ch->video_dev);
1732                         }
1733                         err = -ENOMEM;
1734                         goto vpif_int_err;
1735                 }
1736
1737                 /* Initialize field of video device */
1738                 *vfd = vpif_video_template;
1739                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1740                 vfd->release = video_device_release;
1741                 snprintf(vfd->name, sizeof(vfd->name),
1742                          "DM646x_VPIFDisplay_DRIVER_V%s",
1743                          VPIF_DISPLAY_VERSION);
1744
1745                 /* Set video_dev to the video device */
1746                 ch->video_dev = vfd;
1747         }
1748
1749         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1750                 ch = vpif_obj.dev[j];
1751                 /* Initialize field of the channel objects */
1752                 atomic_set(&ch->usrs, 0);
1753                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1754                         ch->common[k].numbuffers = 0;
1755                         common = &ch->common[k];
1756                         common->io_usrs = 0;
1757                         common->started = 0;
1758                         spin_lock_init(&common->irqlock);
1759                         mutex_init(&common->lock);
1760                         common->numbuffers = 0;
1761                         common->set_addr = NULL;
1762                         common->ytop_off = common->ybtm_off = 0;
1763                         common->ctop_off = common->cbtm_off = 0;
1764                         common->cur_frm = common->next_frm = NULL;
1765                         memset(&common->fmt, 0, sizeof(common->fmt));
1766                         common->numbuffers = config_params.numbuffers[k];
1767
1768                 }
1769                 ch->initialized = 0;
1770                 ch->channel_id = j;
1771                 if (j < 2)
1772                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1773                             config_params.numbuffers[ch->channel_id];
1774                 else
1775                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1776
1777                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1778
1779                 /* Initialize prio member of channel object */
1780                 v4l2_prio_init(&ch->prio);
1781                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1782                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1783                 ch->video_dev->lock = &common->lock;
1784
1785                 /* register video device */
1786                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1787                                 (int)ch, (int)&ch->video_dev);
1788
1789                 err = video_register_device(ch->video_dev,
1790                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1791                 if (err < 0)
1792                         goto probe_out;
1793
1794                 video_set_drvdata(ch->video_dev, ch);
1795         }
1796
1797         i2c_adap = i2c_get_adapter(1);
1798         config = pdev->dev.platform_data;
1799         subdev_count = config->subdev_count;
1800         subdevdata = config->subdevinfo;
1801         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1802                                                                 GFP_KERNEL);
1803         if (vpif_obj.sd == NULL) {
1804                 vpif_err("unable to allocate memory for subdevice pointers\n");
1805                 err = -ENOMEM;
1806                 goto probe_out;
1807         }
1808
1809         for (i = 0; i < subdev_count; i++) {
1810                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1811                                                 i2c_adap,
1812                                                 &subdevdata[i].board_info,
1813                                                 NULL);
1814                 if (!vpif_obj.sd[i]) {
1815                         vpif_err("Error registering v4l2 subdevice\n");
1816                         goto probe_subdev_out;
1817                 }
1818
1819                 if (vpif_obj.sd[i])
1820                         vpif_obj.sd[i]->grp_id = 1 << i;
1821         }
1822
1823         v4l2_info(&vpif_obj.v4l2_dev,
1824                         "DM646x VPIF display driver initialized\n");
1825         return 0;
1826
1827 probe_subdev_out:
1828         kfree(vpif_obj.sd);
1829 probe_out:
1830         for (k = 0; k < j; k++) {
1831                 ch = vpif_obj.dev[k];
1832                 video_unregister_device(ch->video_dev);
1833                 video_device_release(ch->video_dev);
1834                 ch->video_dev = NULL;
1835         }
1836 vpif_int_err:
1837         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1838         vpif_err("VPIF IRQ request failed\n");
1839         for (q = k; k >= 0; k--) {
1840                 for (m = i; m >= res->start; m--)
1841                         free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id));
1842                 res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1);
1843                 m = res->end;
1844         }
1845
1846         return err;
1847 }
1848
1849 /*
1850  * vpif_remove: It un-register channels from V4L2 driver
1851  */
1852 static int vpif_remove(struct platform_device *device)
1853 {
1854         struct channel_obj *ch;
1855         int i;
1856
1857         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1858
1859         /* un-register device */
1860         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1861                 /* Get the pointer to the channel object */
1862                 ch = vpif_obj.dev[i];
1863                 /* Unregister video device */
1864                 video_unregister_device(ch->video_dev);
1865
1866                 ch->video_dev = NULL;
1867         }
1868
1869         return 0;
1870 }
1871
1872 static __refdata struct platform_driver vpif_driver = {
1873         .driver = {
1874                         .name   = "vpif_display",
1875                         .owner  = THIS_MODULE,
1876         },
1877         .probe  = vpif_probe,
1878         .remove = vpif_remove,
1879 };
1880
1881 static __init int vpif_init(void)
1882 {
1883         return platform_driver_register(&vpif_driver);
1884 }
1885
1886 /*
1887  * vpif_cleanup: This function un-registers device and driver to the kernel,
1888  * frees requested irq handler and de-allocates memory allocated for channel
1889  * objects.
1890  */
1891 static void vpif_cleanup(void)
1892 {
1893         struct platform_device *pdev;
1894         struct resource *res;
1895         int irq_num;
1896         int i = 0;
1897
1898         pdev = container_of(vpif_dev, struct platform_device, dev);
1899
1900         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
1901                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
1902                         free_irq(irq_num,
1903                                  (void *)(&vpif_obj.dev[i]->channel_id));
1904                 i++;
1905         }
1906
1907         platform_driver_unregister(&vpif_driver);
1908         kfree(vpif_obj.sd);
1909         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
1910                 kfree(vpif_obj.dev[i]);
1911 }
1912
1913 module_init(vpif_init);
1914 module_exit(vpif_cleanup);