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 "vpif_display.h"
  43 #include "vpif.h"
  44
  45 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  46 MODULE_LICENSE("GPL");
  47 MODULE_VERSION(VPIF_DISPLAY_VERSION);
  48
  49 #define DM646X_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  50
  51 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  52 #define vpif_dbg(level, debug, fmt, arg...)     \
  53                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  54
  55 static int debug = 1;
  56 static u32 ch2_numbuffers = 3;
  57 static u32 ch3_numbuffers = 3;
  58 static u32 ch2_bufsize = 1920 * 1080 * 2;
  59 static u32 ch3_bufsize = 720 * 576 * 2;
  60
  61 module_param(debug, int, 0644);
  62 module_param(ch2_numbuffers, uint, S_IRUGO);
  63 module_param(ch3_numbuffers, uint, S_IRUGO);
  64 module_param(ch2_bufsize, uint, S_IRUGO);
  65 module_param(ch3_bufsize, uint, S_IRUGO);
  66
  67 MODULE_PARM_DESC(debug, "Debug level 0-1");
  68 MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
  69 MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
  70 MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
  71 MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)");
  72
  73 static struct vpif_config_params config_params = {
  74         .min_numbuffers         = 3,
  75         .numbuffers[0]          = 3,
  76         .numbuffers[1]          = 3,
  77         .min_bufsize[0]         = 720 * 480 * 2,
  78         .min_bufsize[1]         = 720 * 480 * 2,
  79         .channel_bufsize[0]     = 1920 * 1080 * 2,
  80         .channel_bufsize[1]     = 720 * 576 * 2,
  81 };
  82
  83 static struct vpif_device vpif_obj = { {NULL} };
  84 static struct device *vpif_dev;
  85
  86 /*
  87  * vpif_uservirt_to_phys: This function is used to convert user
  88  * space virtual address to physical address.
  89  */
  90 static u32 vpif_uservirt_to_phys(u32 virtp)
  91 {
  92         struct mm_struct *mm = current->mm;
  93         unsigned long physp = 0;
  94         struct vm_area_struct *vma;
  95
  96         vma = find_vma(mm, virtp);
  97
  98         /* For kernel direct-mapped memory, take the easy way */
  99         if (virtp >= PAGE_OFFSET) {
 100                 physp = virt_to_phys((void *)virtp);
 101         } else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) {
 102                 /* this will catch, kernel-allocated, mmaped-to-usermode addr */
 103                 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
 104         } else {
 105                 /* otherwise, use get_user_pages() for general userland pages */
 106                 int res, nr_pages = 1;
 107                 struct page *pages;
 108                 down_read(&current->mm->mmap_sem);
 109
 110                 res = get_user_pages(current, current->mm,
 111                                      virtp, nr_pages, 1, 0, &pages, NULL);
 112                 up_read(&current->mm->mmap_sem);
 113
 114                 if (res == nr_pages) {
 115                         physp = __pa(page_address(&pages[0]) +
 116                                                         (virtp & ~PAGE_MASK));
 117                 } else {
 118                         vpif_err("get_user_pages failed\n");
 119                         return 0;
 120                 }
 121         }
 122
 123         return physp;
 124 }
 125
 126 /*
 127  * buffer_prepare: This is the callback function called from videobuf_qbuf()
 128  * function the buffer is prepared and user space virtual address is converted
 129  * into physical address
 130  */
 131 static int vpif_buffer_prepare(struct videobuf_queue *q,
 132                                struct videobuf_buffer *vb,
 133                                enum v4l2_field field)
 134 {
 135         struct vpif_fh *fh = q->priv_data;
 136         struct common_obj *common;
 137         unsigned long addr;
 138
 139         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 140         if (VIDEOBUF_NEEDS_INIT == vb->state) {
 141                 vb->width       = common->width;
 142                 vb->height      = common->height;
 143                 vb->size        = vb->width * vb->height;
 144                 vb->field       = field;
 145         }
 146         vb->state = VIDEOBUF_PREPARED;
 147
 148         /* if user pointer memory mechanism is used, get the physical
 149          * address of the buffer */
 150         if (V4L2_MEMORY_USERPTR == common->memory) {
 151                 if (!vb->baddr) {
 152                         vpif_err("buffer_address is 0\n");
 153                         return -EINVAL;
 154                 }
 155
 156                 vb->boff = vpif_uservirt_to_phys(vb->baddr);
 157                 if (!ISALIGNED(vb->boff))
 158                         goto buf_align_exit;
 159         }
 160
 161         addr = vb->boff;
 162         if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
 163                 if (!ISALIGNED(addr + common->ytop_off) ||
 164                     !ISALIGNED(addr + common->ybtm_off) ||
 165                     !ISALIGNED(addr + common->ctop_off) ||
 166                     !ISALIGNED(addr + common->cbtm_off))
 167                         goto buf_align_exit;
 168         }
 169         return 0;
 170
 171 buf_align_exit:
 172         vpif_err("buffer offset not aligned to 8 bytes\n");
 173         return -EINVAL;
 174 }
 175
 176 /*
 177  * vpif_buffer_setup: This function allocates memory for the buffers
 178  */
 179 static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
 180                                 unsigned int *size)
 181 {
 182         struct vpif_fh *fh = q->priv_data;
 183         struct channel_obj *ch = fh->channel;
 184         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 185
 186         if (V4L2_MEMORY_MMAP != common->memory)
 187                 return 0;
 188
 189         *size = config_params.channel_bufsize[ch->channel_id];
 190         if (*count < config_params.min_numbuffers)
 191                 *count = config_params.min_numbuffers;
 192
 193         return 0;
 194 }
 195
 196 /*
 197  * vpif_buffer_queue: This function adds the buffer to DMA queue
 198  */
 199 static void vpif_buffer_queue(struct videobuf_queue *q,
 200                               struct videobuf_buffer *vb)
 201 {
 202         struct vpif_fh *fh = q->priv_data;
 203         struct common_obj *common;
 204
 205         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 206
 207         /* add the buffer to the DMA queue */
 208         list_add_tail(&vb->queue, &common->dma_queue);
 209         vb->state = VIDEOBUF_QUEUED;
 210 }
 211
 212 /*
 213  * vpif_buffer_release: This function is called from the videobuf layer to
 214  * free memory allocated to the buffers
 215  */
 216 static void vpif_buffer_release(struct videobuf_queue *q,
 217                                 struct videobuf_buffer *vb)
 218 {
 219         struct vpif_fh *fh = q->priv_data;
 220         struct channel_obj *ch = fh->channel;
 221         struct common_obj *common;
 222         unsigned int buf_size = 0;
 223
 224         common = &ch->common[VPIF_VIDEO_INDEX];
 225
 226         videobuf_dma_contig_free(q, vb);
 227         vb->state = VIDEOBUF_NEEDS_INIT;
 228
 229         if (V4L2_MEMORY_MMAP != common->memory)
 230                 return;
 231
 232         buf_size = config_params.channel_bufsize[ch->channel_id];
 233 }
 234
 235 static struct videobuf_queue_ops video_qops = {
 236         .buf_setup      = vpif_buffer_setup,
 237         .buf_prepare    = vpif_buffer_prepare,
 238         .buf_queue      = vpif_buffer_queue,
 239         .buf_release    = vpif_buffer_release,
 240 };
 241 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 242
 243 static void process_progressive_mode(struct common_obj *common)
 244 {
 245         unsigned long addr = 0;
 246
 247         /* Get the next buffer from buffer queue */
 248         common->next_frm = list_entry(common->dma_queue.next,
 249                                 struct videobuf_buffer, queue);
 250         /* Remove that buffer from the buffer queue */
 251         list_del(&common->next_frm->queue);
 252         /* Mark status of the buffer as active */
 253         common->next_frm->state = VIDEOBUF_ACTIVE;
 254
 255         /* Set top and bottom field addrs in VPIF registers */
 256         addr = videobuf_to_dma_contig(common->next_frm);
 257         common->set_addr(addr + common->ytop_off,
 258                                  addr + common->ybtm_off,
 259                                  addr + common->ctop_off,
 260                                  addr + common->cbtm_off);
 261 }
 262
 263 static void process_interlaced_mode(int fid, struct common_obj *common)
 264 {
 265         /* device field id and local field id are in sync */
 266         /* If this is even field */
 267         if (0 == fid) {
 268                 if (common->cur_frm == common->next_frm)
 269                         return;
 270
 271                 /* one frame is displayed If next frame is
 272                  *  available, release cur_frm and move on */
 273                 /* Copy frame display time */
 274                 do_gettimeofday(&common->cur_frm->ts);
 275                 /* Change status of the cur_frm */
 276                 common->cur_frm->state = VIDEOBUF_DONE;
 277                 /* unlock semaphore on cur_frm */
 278                 wake_up_interruptible(&common->cur_frm->done);
 279                 /* Make cur_frm pointing to next_frm */
 280                 common->cur_frm = common->next_frm;
 281
 282         } else if (1 == fid) {  /* odd field */
 283                 if (list_empty(&common->dma_queue)
 284                     || (common->cur_frm != common->next_frm)) {
 285                         return;
 286                 }
 287                 /* one field is displayed configure the next
 288                  * frame if it is available else hold on current
 289                  * frame */
 290                 /* Get next from the buffer queue */
 291                 process_progressive_mode(common);
 292
 293         }
 294 }
 295
 296 /*
 297  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 298  * buffer from the queue and sets its address in VPIF registers
 299  */
 300 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 301 {
 302         struct vpif_device *dev = &vpif_obj;
 303         struct channel_obj *ch;
 304         struct common_obj *common;
 305         enum v4l2_field field;
 306         int fid = -1, i;
 307         int channel_id = 0;
 308
 309         channel_id = *(int *)(dev_id);
 310         ch = dev->dev[channel_id];
 311         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 312         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 313                 common = &ch->common[i];
 314                 /* If streaming is started in this channel */
 315                 if (0 == common->started)
 316                         continue;
 317
 318                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 319                         if (list_empty(&common->dma_queue))
 320                                 continue;
 321
 322                         /* Progressive mode */
 323                         if (!channel_first_int[i][channel_id]) {
 324                                 /* Mark status of the cur_frm to
 325                                  * done and unlock semaphore on it */
 326                                 do_gettimeofday(&common->cur_frm->ts);
 327                                 common->cur_frm->state = VIDEOBUF_DONE;
 328                                 wake_up_interruptible(&common->cur_frm->done);
 329                                 /* Make cur_frm pointing to next_frm */
 330                                 common->cur_frm = common->next_frm;
 331                         }
 332
 333                         channel_first_int[i][channel_id] = 0;
 334                         process_progressive_mode(common);
 335                 } else {
 336                         /* Interlaced mode */
 337                         /* If it is first interrupt, ignore it */
 338
 339                         if (channel_first_int[i][channel_id]) {
 340                                 channel_first_int[i][channel_id] = 0;
 341                                 continue;
 342                         }
 343
 344                         if (0 == i) {
 345                                 ch->field_id ^= 1;
 346                                 /* Get field id from VPIF registers */
 347                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 348                                 /* If fid does not match with stored field id */
 349                                 if (fid != ch->field_id) {
 350                                         /* Make them in sync */
 351                                         if (0 == fid)
 352                                                 ch->field_id = fid;
 353
 354                                         return IRQ_HANDLED;
 355                                 }
 356                         }
 357                         process_interlaced_mode(fid, common);
 358                 }
 359         }
 360
 361         return IRQ_HANDLED;
 362 }
 363
 364 static int vpif_update_std_info(struct channel_obj *ch)
 365 {
 366         struct video_obj *vid_ch = &ch->video;
 367         struct vpif_params *vpifparams = &ch->vpifparams;
 368         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 369         const struct vpif_channel_config_params *config;
 370
 371         int i;
 372
 373         for (i = 0; i < vpif_ch_params_count; i++) {
 374                 config = &ch_params[i];
 375                 if (config->hd_sd == 0) {
 376                         vpif_dbg(2, debug, "SD format\n");
 377                         if (config->stdid & vid_ch->stdid) {
 378                                 memcpy(std_info, config, sizeof(*config));
 379                                 break;
 380                         }
 381                 } else {
 382                         vpif_dbg(2, debug, "HD format\n");
 383                         if (config->dv_preset == vid_ch->dv_preset) {
 384                                 memcpy(std_info, config, sizeof(*config));
 385                                 break;
 386                         }
 387                 }
 388         }
 389
 390         if (i == vpif_ch_params_count) {
 391                 vpif_dbg(1, debug, "Format not found\n");
 392                 return -EINVAL;
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int vpif_update_resolution(struct channel_obj *ch)
 399 {
 400         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 401         struct video_obj *vid_ch = &ch->video;
 402         struct vpif_params *vpifparams = &ch->vpifparams;
 403         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 404
 405         if (!vid_ch->stdid && !vid_ch->dv_preset && !vid_ch->bt_timings.height)
 406                 return -EINVAL;
 407
 408         if (vid_ch->stdid || vid_ch->dv_preset) {
 409                 if (vpif_update_std_info(ch))
 410                         return -EINVAL;
 411         }
 412
 413         common->fmt.fmt.pix.width = std_info->width;
 414         common->fmt.fmt.pix.height = std_info->height;
 415         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 416                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 417
 418         /* Set height and width paramateres */
 419         common->height = std_info->height;
 420         common->width = std_info->width;
 421
 422         return 0;
 423 }
 424
 425 /*
 426  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 427  * in the top and bottom field
 428  */
 429 static void vpif_calculate_offsets(struct channel_obj *ch)
 430 {
 431         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 432         struct vpif_params *vpifparams = &ch->vpifparams;
 433         enum v4l2_field field = common->fmt.fmt.pix.field;
 434         struct video_obj *vid_ch = &ch->video;
 435         unsigned int hpitch, vpitch, sizeimage;
 436
 437         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 438                 if (ch->vpifparams.std_info.frm_fmt)
 439                         vid_ch->buf_field = V4L2_FIELD_NONE;
 440                 else
 441                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 442         } else {
 443                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 444         }
 445
 446         if (V4L2_MEMORY_USERPTR == common->memory)
 447                 sizeimage = common->fmt.fmt.pix.sizeimage;
 448         else
 449                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 450
 451         hpitch = common->fmt.fmt.pix.bytesperline;
 452         vpitch = sizeimage / (hpitch * 2);
 453         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 454             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 455                 common->ytop_off = 0;
 456                 common->ybtm_off = hpitch;
 457                 common->ctop_off = sizeimage / 2;
 458                 common->cbtm_off = sizeimage / 2 + hpitch;
 459         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 460                 common->ytop_off = 0;
 461                 common->ybtm_off = sizeimage / 4;
 462                 common->ctop_off = sizeimage / 2;
 463                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 464         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 465                 common->ybtm_off = 0;
 466                 common->ytop_off = sizeimage / 4;
 467                 common->cbtm_off = sizeimage / 2;
 468                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 469         }
 470
 471         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 472             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 473                 vpifparams->video_params.storage_mode = 1;
 474         } else {
 475                 vpifparams->video_params.storage_mode = 0;
 476         }
 477
 478         if (ch->vpifparams.std_info.frm_fmt == 1) {
 479                 vpifparams->video_params.hpitch =
 480                     common->fmt.fmt.pix.bytesperline;
 481         } else {
 482                 if ((field == V4L2_FIELD_ANY) ||
 483                         (field == V4L2_FIELD_INTERLACED))
 484                         vpifparams->video_params.hpitch =
 485                             common->fmt.fmt.pix.bytesperline * 2;
 486                 else
 487                         vpifparams->video_params.hpitch =
 488                             common->fmt.fmt.pix.bytesperline;
 489         }
 490
 491         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 492 }
 493
 494 static void vpif_config_format(struct channel_obj *ch)
 495 {
 496         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 497
 498         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 499         if (config_params.numbuffers[ch->channel_id] == 0)
 500                 common->memory = V4L2_MEMORY_USERPTR;
 501         else
 502                 common->memory = V4L2_MEMORY_MMAP;
 503
 504         common->fmt.fmt.pix.sizeimage =
 505                         config_params.channel_bufsize[ch->channel_id];
 506         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 507         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 508 }
 509
 510 static int vpif_check_format(struct channel_obj *ch,
 511                              struct v4l2_pix_format *pixfmt)
 512 {
 513         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 514         enum v4l2_field field = pixfmt->field;
 515         u32 sizeimage, hpitch, vpitch;
 516
 517         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 518                 goto invalid_fmt_exit;
 519
 520         if (!(VPIF_VALID_FIELD(field)))
 521                 goto invalid_fmt_exit;
 522
 523         if (pixfmt->bytesperline <= 0)
 524                 goto invalid_pitch_exit;
 525
 526         if (V4L2_MEMORY_USERPTR == common->memory)
 527                 sizeimage = pixfmt->sizeimage;
 528         else
 529                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 530
 531         if (vpif_update_resolution(ch))
 532                 return -EINVAL;
 533
 534         hpitch = pixfmt->bytesperline;
 535         vpitch = sizeimage / (hpitch * 2);
 536
 537         /* Check for valid value of pitch */
 538         if ((hpitch < ch->vpifparams.std_info.width) ||
 539             (vpitch < ch->vpifparams.std_info.height))
 540                 goto invalid_pitch_exit;
 541
 542         /* Check for 8 byte alignment */
 543         if (!ISALIGNED(hpitch)) {
 544                 vpif_err("invalid pitch alignment\n");
 545                 return -EINVAL;
 546         }
 547         pixfmt->width = common->fmt.fmt.pix.width;
 548         pixfmt->height = common->fmt.fmt.pix.height;
 549
 550         return 0;
 551
 552 invalid_fmt_exit:
 553         vpif_err("invalid field format\n");
 554         return -EINVAL;
 555
 556 invalid_pitch_exit:
 557         vpif_err("invalid pitch\n");
 558         return -EINVAL;
 559 }
 560
 561 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 562 {
 563         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 564
 565         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 566                 common->set_addr = ch3_set_videobuf_addr;
 567         } else {
 568                 if (2 == muxmode)
 569                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 570                 else
 571                         common->set_addr = ch2_set_videobuf_addr;
 572         }
 573 }
 574
 575 /*
 576  * vpif_mmap: It is used to map kernel space buffers into user spaces
 577  */
 578 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 579 {
 580         struct vpif_fh *fh = filep->private_data;
 581         struct channel_obj *ch = fh->channel;
 582         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 583
 584         vpif_dbg(2, debug, "vpif_mmap\n");
 585
 586         return videobuf_mmap_mapper(&common->buffer_queue, vma);
 587 }
 588
 589 /*
 590  * vpif_poll: It is used for select/poll system call
 591  */
 592 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 593 {
 594         struct vpif_fh *fh = filep->private_data;
 595         struct channel_obj *ch = fh->channel;
 596         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 597
 598         if (common->started)
 599                 return videobuf_poll_stream(filep, &common->buffer_queue, wait);
 600
 601         return 0;
 602 }
 603
 604 /*
 605  * vpif_open: It creates object of file handle structure and stores it in
 606  * private_data member of filepointer
 607  */
 608 static int vpif_open(struct file *filep)
 609 {
 610         struct video_device *vdev = video_devdata(filep);
 611         struct channel_obj *ch = NULL;
 612         struct vpif_fh *fh = NULL;
 613
 614         ch = video_get_drvdata(vdev);
 615         /* Allocate memory for the file handle object */
 616         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 617         if (fh == NULL) {
 618                 vpif_err("unable to allocate memory for file handle object\n");
 619                 return -ENOMEM;
 620         }
 621
 622         /* store pointer to fh in private_data member of filep */
 623         filep->private_data = fh;
 624         fh->channel = ch;
 625         fh->initialized = 0;
 626         if (!ch->initialized) {
 627                 fh->initialized = 1;
 628                 ch->initialized = 1;
 629                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 630         }
 631
 632         /* Increment channel usrs counter */
 633         atomic_inc(&ch->usrs);
 634         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 635         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 636         /* Initialize priority of this instance to default priority */
 637         fh->prio = V4L2_PRIORITY_UNSET;
 638         v4l2_prio_open(&ch->prio, &fh->prio);
 639
 640         return 0;
 641 }
 642
 643 /*
 644  * vpif_release: This function deletes buffer queue, frees the buffers and
 645  * the vpif file handle
 646  */
 647 static int vpif_release(struct file *filep)
 648 {
 649         struct vpif_fh *fh = filep->private_data;
 650         struct channel_obj *ch = fh->channel;
 651         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 652
 653         /* if this instance is doing IO */
 654         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 655                 /* Reset io_usrs member of channel object */
 656                 common->io_usrs = 0;
 657                 /* Disable channel */
 658                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 659                         enable_channel2(0);
 660                         channel2_intr_enable(0);
 661                 }
 662                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 663                     (2 == common->started)) {
 664                         enable_channel3(0);
 665                         channel3_intr_enable(0);
 666                 }
 667                 common->started = 0;
 668                 /* Free buffers allocated */
 669                 videobuf_queue_cancel(&common->buffer_queue);
 670                 videobuf_mmap_free(&common->buffer_queue);
 671                 common->numbuffers =
 672                     config_params.numbuffers[ch->channel_id];
 673         }
 674
 675         /* Decrement channel usrs counter */
 676         atomic_dec(&ch->usrs);
 677         /* If this file handle has initialize encoder device, reset it */
 678         if (fh->initialized)
 679                 ch->initialized = 0;
 680
 681         /* Close the priority */
 682         v4l2_prio_close(&ch->prio, fh->prio);
 683         filep->private_data = NULL;
 684         fh->initialized = 0;
 685         kfree(fh);
 686
 687         return 0;
 688 }
 689
 690 /* functions implementing ioctls */
 691 /**
 692  * vpif_querycap() - QUERYCAP handler
 693  * @file: file ptr
 694  * @priv: file handle
 695  * @cap: ptr to v4l2_capability structure
 696  */
 697 static int vpif_querycap(struct file *file, void  *priv,
 698                                 struct v4l2_capability *cap)
 699 {
 700         struct vpif_display_config *config = vpif_dev->platform_data;
 701
 702         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 703         strlcpy(cap->driver, "vpif display", sizeof(cap->driver));
 704         strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info));
 705         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 706
 707         return 0;
 708 }
 709
 710 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 711                                         struct v4l2_fmtdesc *fmt)
 712 {
 713         if (fmt->index != 0) {
 714                 vpif_err("Invalid format index\n");
 715                 return -EINVAL;
 716         }
 717
 718         /* Fill in the information about format */
 719         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 720         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 721         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 722
 723         return 0;
 724 }
 725
 726 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 727                                 struct v4l2_format *fmt)
 728 {
 729         struct vpif_fh *fh = priv;
 730         struct channel_obj *ch = fh->channel;
 731         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 732
 733         /* Check the validity of the buffer type */
 734         if (common->fmt.type != fmt->type)
 735                 return -EINVAL;
 736
 737         if (vpif_update_resolution(ch))
 738                 return -EINVAL;
 739         *fmt = common->fmt;
 740         return 0;
 741 }
 742
 743 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 744                                 struct v4l2_format *fmt)
 745 {
 746         struct vpif_fh *fh = priv;
 747         struct v4l2_pix_format *pixfmt;
 748         struct channel_obj *ch = fh->channel;
 749         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 750         int ret = 0;
 751
 752         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 753             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 754                 if (!fh->initialized) {
 755                         vpif_dbg(1, debug, "Channel Busy\n");
 756                         return -EBUSY;
 757                 }
 758
 759                 /* Check for the priority */
 760                 ret = v4l2_prio_check(&ch->prio, fh->prio);
 761                 if (0 != ret)
 762                         return ret;
 763                 fh->initialized = 1;
 764         }
 765
 766         if (common->started) {
 767                 vpif_dbg(1, debug, "Streaming in progress\n");
 768                 return -EBUSY;
 769         }
 770
 771         pixfmt = &fmt->fmt.pix;
 772         /* Check for valid field format */
 773         ret = vpif_check_format(ch, pixfmt);
 774         if (ret)
 775                 return ret;
 776
 777         /* store the pix format in the channel object */
 778         common->fmt.fmt.pix = *pixfmt;
 779         /* store the format in the channel object */
 780         common->fmt = *fmt;
 781         return 0;
 782 }
 783
 784 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 785                                 struct v4l2_format *fmt)
 786 {
 787         struct vpif_fh *fh = priv;
 788         struct channel_obj *ch = fh->channel;
 789         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 790         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 791         int ret = 0;
 792
 793         ret = vpif_check_format(ch, pixfmt);
 794         if (ret) {
 795                 *pixfmt = common->fmt.fmt.pix;
 796                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 797         }
 798
 799         return ret;
 800 }
 801
 802 static int vpif_reqbufs(struct file *file, void *priv,
 803                         struct v4l2_requestbuffers *reqbuf)
 804 {
 805         struct vpif_fh *fh = priv;
 806         struct channel_obj *ch = fh->channel;
 807         struct common_obj *common;
 808         enum v4l2_field field;
 809         u8 index = 0;
 810
 811         /* This file handle has not initialized the channel,
 812            It is not allowed to do settings */
 813         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 814             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 815                 if (!fh->initialized) {
 816                         vpif_err("Channel Busy\n");
 817                         return -EBUSY;
 818                 }
 819         }
 820
 821         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 822                 return -EINVAL;
 823
 824         index = VPIF_VIDEO_INDEX;
 825
 826         common = &ch->common[index];
 827
 828         if (common->fmt.type != reqbuf->type)
 829                 return -EINVAL;
 830
 831         if (0 != common->io_usrs)
 832                 return -EBUSY;
 833
 834         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 835                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 836                         field = V4L2_FIELD_INTERLACED;
 837                 else
 838                         field = common->fmt.fmt.pix.field;
 839         } else {
 840                 field = V4L2_VBI_INTERLACED;
 841         }
 842
 843         /* Initialize videobuf queue as per the buffer type */
 844         videobuf_queue_dma_contig_init(&common->buffer_queue,
 845                                             &video_qops, NULL,
 846                                             &common->irqlock,
 847                                             reqbuf->type, field,
 848                                             sizeof(struct videobuf_buffer), fh,
 849                                             &common->lock);
 850
 851         /* Set io allowed member of file handle to TRUE */
 852         fh->io_allowed[index] = 1;
 853         /* Increment io usrs member of channel object to 1 */
 854         common->io_usrs = 1;
 855         /* Store type of memory requested in channel object */
 856         common->memory = reqbuf->memory;
 857         INIT_LIST_HEAD(&common->dma_queue);
 858
 859         /* Allocate buffers */
 860         return videobuf_reqbufs(&common->buffer_queue, reqbuf);
 861 }
 862
 863 static int vpif_querybuf(struct file *file, void *priv,
 864                                 struct v4l2_buffer *tbuf)
 865 {
 866         struct vpif_fh *fh = priv;
 867         struct channel_obj *ch = fh->channel;
 868         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 869
 870         if (common->fmt.type != tbuf->type)
 871                 return -EINVAL;
 872
 873         return videobuf_querybuf(&common->buffer_queue, tbuf);
 874 }
 875
 876 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 877 {
 878
 879         struct vpif_fh *fh = priv;
 880         struct channel_obj *ch = fh->channel;
 881         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 882         struct v4l2_buffer tbuf = *buf;
 883         struct videobuf_buffer *buf1;
 884         unsigned long addr = 0;
 885         unsigned long flags;
 886         int ret = 0;
 887
 888         if (common->fmt.type != tbuf.type)
 889                 return -EINVAL;
 890
 891         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
 892                 vpif_err("fh->io_allowed\n");
 893                 return -EACCES;
 894         }
 895
 896         if (!(list_empty(&common->dma_queue)) ||
 897             (common->cur_frm != common->next_frm) ||
 898             !(common->started) ||
 899             (common->started && (0 == ch->field_id)))
 900                 return videobuf_qbuf(&common->buffer_queue, buf);
 901
 902         /* bufferqueue is empty store buffer address in VPIF registers */
 903         mutex_lock(&common->buffer_queue.vb_lock);
 904         buf1 = common->buffer_queue.bufs[tbuf.index];
 905         if (buf1->memory != tbuf.memory) {
 906                 vpif_err("invalid buffer type\n");
 907                 goto qbuf_exit;
 908         }
 909
 910         if ((buf1->state == VIDEOBUF_QUEUED) ||
 911             (buf1->state == VIDEOBUF_ACTIVE)) {
 912                 vpif_err("invalid state\n");
 913                 goto qbuf_exit;
 914         }
 915
 916         switch (buf1->memory) {
 917         case V4L2_MEMORY_MMAP:
 918                 if (buf1->baddr == 0)
 919                         goto qbuf_exit;
 920                 break;
 921
 922         case V4L2_MEMORY_USERPTR:
 923                 if (tbuf.length < buf1->bsize)
 924                         goto qbuf_exit;
 925
 926                 if ((VIDEOBUF_NEEDS_INIT != buf1->state)
 927                             && (buf1->baddr != tbuf.m.userptr)) {
 928                         vpif_buffer_release(&common->buffer_queue, buf1);
 929                         buf1->baddr = tbuf.m.userptr;
 930                 }
 931                 break;
 932
 933         default:
 934                 goto qbuf_exit;
 935         }
 936
 937         local_irq_save(flags);
 938         ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
 939                                         common->buffer_queue.field);
 940         if (ret < 0) {
 941                 local_irq_restore(flags);
 942                 goto qbuf_exit;
 943         }
 944
 945         buf1->state = VIDEOBUF_ACTIVE;
 946         addr = buf1->boff;
 947         common->next_frm = buf1;
 948         if (tbuf.type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
 949                 common->set_addr((addr + common->ytop_off),
 950                                  (addr + common->ybtm_off),
 951                                  (addr + common->ctop_off),
 952                                  (addr + common->cbtm_off));
 953         }
 954
 955         local_irq_restore(flags);
 956         list_add_tail(&buf1->stream, &common->buffer_queue.stream);
 957         mutex_unlock(&common->buffer_queue.vb_lock);
 958         return 0;
 959
 960 qbuf_exit:
 961         mutex_unlock(&common->buffer_queue.vb_lock);
 962         return -EINVAL;
 963 }
 964
 965 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
 966 {
 967         struct vpif_fh *fh = priv;
 968         struct channel_obj *ch = fh->channel;
 969         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 970         int ret = 0;
 971
 972         if (!(*std_id & DM646X_V4L2_STD))
 973                 return -EINVAL;
 974
 975         if (common->started) {
 976                 vpif_err("streaming in progress\n");
 977                 return -EBUSY;
 978         }
 979
 980         /* Call encoder subdevice function to set the standard */
 981         ch->video.stdid = *std_id;
 982         ch->video.dv_preset = V4L2_DV_INVALID;
 983         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
 984
 985         /* Get the information about the standard */
 986         if (vpif_update_resolution(ch))
 987                 return -EINVAL;
 988
 989         if ((ch->vpifparams.std_info.width *
 990                 ch->vpifparams.std_info.height * 2) >
 991                 config_params.channel_bufsize[ch->channel_id]) {
 992                 vpif_err("invalid std for this size\n");
 993                 return -EINVAL;
 994         }
 995
 996         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
 997         /* Configure the default format information */
 998         vpif_config_format(ch);
 999
1000         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1001                                                 s_std_output, *std_id);
1002         if (ret < 0) {
1003                 vpif_err("Failed to set output standard\n");
1004                 return ret;
1005         }
1006
1007         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1008                                                         s_std, *std_id);
1009         if (ret < 0)
1010                 vpif_err("Failed to set standard for sub devices\n");
1011         return ret;
1012 }
1013
1014 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1015 {
1016         struct vpif_fh *fh = priv;
1017         struct channel_obj *ch = fh->channel;
1018
1019         *std = ch->video.stdid;
1020         return 0;
1021 }
1022
1023 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1024 {
1025         struct vpif_fh *fh = priv;
1026         struct channel_obj *ch = fh->channel;
1027         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1028
1029         return videobuf_dqbuf(&common->buffer_queue, p,
1030                                         (file->f_flags & O_NONBLOCK));
1031 }
1032
1033 static int vpif_streamon(struct file *file, void *priv,
1034                                 enum v4l2_buf_type buftype)
1035 {
1036         struct vpif_fh *fh = priv;
1037         struct channel_obj *ch = fh->channel;
1038         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1039         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1040         struct vpif_params *vpif = &ch->vpifparams;
1041         struct vpif_display_config *vpif_config_data =
1042                                         vpif_dev->platform_data;
1043         unsigned long addr = 0;
1044         int ret = 0;
1045
1046         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1047                 vpif_err("buffer type not supported\n");
1048                 return -EINVAL;
1049         }
1050
1051         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1052                 vpif_err("fh->io_allowed\n");
1053                 return -EACCES;
1054         }
1055
1056         /* If Streaming is already started, return error */
1057         if (common->started) {
1058                 vpif_err("channel->started\n");
1059                 return -EBUSY;
1060         }
1061
1062         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1063                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1064                 ch->vpifparams.std_info.ycmux_mode == 0)
1065                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1066                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1067                 vpif_err("other channel is using\n");
1068                 return -EBUSY;
1069         }
1070
1071         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1072         if (ret < 0)
1073                 return ret;
1074
1075         /* Call videobuf_streamon to start streaming in videobuf */
1076         ret = videobuf_streamon(&common->buffer_queue);
1077         if (ret < 0) {
1078                 vpif_err("videobuf_streamon\n");
1079                 return ret;
1080         }
1081
1082         /* If buffer queue is empty, return error */
1083         if (list_empty(&common->dma_queue)) {
1084                 vpif_err("buffer queue is empty\n");
1085                 return -EIO;
1086         }
1087
1088         /* Get the next frame from the buffer queue */
1089         common->next_frm = common->cur_frm =
1090                             list_entry(common->dma_queue.next,
1091                                        struct videobuf_buffer, queue);
1092
1093         list_del(&common->cur_frm->queue);
1094         /* Mark state of the current frame to active */
1095         common->cur_frm->state = VIDEOBUF_ACTIVE;
1096
1097         /* Initialize field_id and started member */
1098         ch->field_id = 0;
1099         common->started = 1;
1100         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1101                 addr = common->cur_frm->boff;
1102                 /* Calculate the offset for Y and C data  in the buffer */
1103                 vpif_calculate_offsets(ch);
1104
1105                 if ((ch->vpifparams.std_info.frm_fmt &&
1106                         ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
1107                         && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
1108                         || (!ch->vpifparams.std_info.frm_fmt
1109                         && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
1110                         vpif_err("conflict in field format and std format\n");
1111                         return -EINVAL;
1112                 }
1113
1114                 /* clock settings */
1115                 ret =
1116                  vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
1117                                                 ch->vpifparams.std_info.hd_sd);
1118                 if (ret < 0) {
1119                         vpif_err("can't set clock\n");
1120                         return ret;
1121                 }
1122
1123                 /* set the parameters and addresses */
1124                 ret = vpif_set_video_params(vpif, ch->channel_id + 2);
1125                 if (ret < 0)
1126                         return ret;
1127
1128                 common->started = ret;
1129                 vpif_config_addr(ch, ret);
1130                 common->set_addr((addr + common->ytop_off),
1131                                  (addr + common->ybtm_off),
1132                                  (addr + common->ctop_off),
1133                                  (addr + common->cbtm_off));
1134
1135                 /* Set interrupt for both the fields in VPIF
1136                    Register enable channel in VPIF register */
1137                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1138                         channel2_intr_assert();
1139                         channel2_intr_enable(1);
1140                         enable_channel2(1);
1141                 }
1142
1143                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
1144                         || (common->started == 2)) {
1145                         channel3_intr_assert();
1146                         channel3_intr_enable(1);
1147                         enable_channel3(1);
1148                 }
1149                 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
1150         }
1151         return ret;
1152 }
1153
1154 static int vpif_streamoff(struct file *file, void *priv,
1155                                 enum v4l2_buf_type buftype)
1156 {
1157         struct vpif_fh *fh = priv;
1158         struct channel_obj *ch = fh->channel;
1159         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1160
1161         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1162                 vpif_err("buffer type not supported\n");
1163                 return -EINVAL;
1164         }
1165
1166         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1167                 vpif_err("fh->io_allowed\n");
1168                 return -EACCES;
1169         }
1170
1171         if (!common->started) {
1172                 vpif_err("channel->started\n");
1173                 return -EINVAL;
1174         }
1175
1176         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1177                 /* disable channel */
1178                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1179                         enable_channel2(0);
1180                         channel2_intr_enable(0);
1181                 }
1182                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1183                                         (2 == common->started)) {
1184                         enable_channel3(0);
1185                         channel3_intr_enable(0);
1186                 }
1187         }
1188
1189         common->started = 0;
1190         return videobuf_streamoff(&common->buffer_queue);
1191 }
1192
1193 static int vpif_cropcap(struct file *file, void *priv,
1194                         struct v4l2_cropcap *crop)
1195 {
1196         struct vpif_fh *fh = priv;
1197         struct channel_obj *ch = fh->channel;
1198         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1199         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1200                 return -EINVAL;
1201
1202         crop->bounds.left = crop->bounds.top = 0;
1203         crop->defrect.left = crop->defrect.top = 0;
1204         crop->defrect.height = crop->bounds.height = common->height;
1205         crop->defrect.width = crop->bounds.width = common->width;
1206
1207         return 0;
1208 }
1209
1210 static int vpif_enum_output(struct file *file, void *fh,
1211                                 struct v4l2_output *output)
1212 {
1213
1214         struct vpif_display_config *config = vpif_dev->platform_data;
1215
1216         if (output->index >= config->output_count) {
1217                 vpif_dbg(1, debug, "Invalid output index\n");
1218                 return -EINVAL;
1219         }
1220
1221         strcpy(output->name, config->output[output->index]);
1222         output->type = V4L2_OUTPUT_TYPE_ANALOG;
1223         output->std = DM646X_V4L2_STD;
1224
1225         return 0;
1226 }
1227
1228 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1229 {
1230         struct vpif_fh *fh = priv;
1231         struct channel_obj *ch = fh->channel;
1232         struct video_obj *vid_ch = &ch->video;
1233         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1234         int ret = 0;
1235
1236         if (common->started) {
1237                 vpif_err("Streaming in progress\n");
1238                 return -EBUSY;
1239         }
1240
1241         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1242                                                         s_routing, 0, i, 0);
1243
1244         if (ret < 0)
1245                 vpif_err("Failed to set output standard\n");
1246
1247         vid_ch->output_id = i;
1248         return ret;
1249 }
1250
1251 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1252 {
1253         struct vpif_fh *fh = priv;
1254         struct channel_obj *ch = fh->channel;
1255         struct video_obj *vid_ch = &ch->video;
1256
1257         *i = vid_ch->output_id;
1258
1259         return 0;
1260 }
1261
1262 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1263 {
1264         struct vpif_fh *fh = priv;
1265         struct channel_obj *ch = fh->channel;
1266
1267         *p = v4l2_prio_max(&ch->prio);
1268
1269         return 0;
1270 }
1271
1272 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1273 {
1274         struct vpif_fh *fh = priv;
1275         struct channel_obj *ch = fh->channel;
1276
1277         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1278 }
1279
1280 /**
1281  * vpif_enum_dv_presets() - ENUM_DV_PRESETS handler
1282  * @file: file ptr
1283  * @priv: file handle
1284  * @preset: input preset
1285  */
1286 static int vpif_enum_dv_presets(struct file *file, void *priv,
1287                 struct v4l2_dv_enum_preset *preset)
1288 {
1289         struct vpif_fh *fh = priv;
1290         struct channel_obj *ch = fh->channel;
1291         struct video_obj *vid_ch = &ch->video;
1292
1293         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1294                         video, enum_dv_presets, preset);
1295 }
1296
1297 /**
1298  * vpif_s_dv_presets() - S_DV_PRESETS handler
1299  * @file: file ptr
1300  * @priv: file handle
1301  * @preset: input preset
1302  */
1303 static int vpif_s_dv_preset(struct file *file, void *priv,
1304                 struct v4l2_dv_preset *preset)
1305 {
1306         struct vpif_fh *fh = priv;
1307         struct channel_obj *ch = fh->channel;
1308         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1309         struct video_obj *vid_ch = &ch->video;
1310         int ret = 0;
1311
1312         if (common->started) {
1313                 vpif_dbg(1, debug, "streaming in progress\n");
1314                 return -EBUSY;
1315         }
1316
1317         ret = v4l2_prio_check(&ch->prio, fh->prio);
1318         if (ret != 0)
1319                 return ret;
1320
1321         fh->initialized = 1;
1322
1323         /* Call encoder subdevice function to set the standard */
1324         if (mutex_lock_interruptible(&common->lock))
1325                 return -ERESTARTSYS;
1326
1327         ch->video.dv_preset = preset->preset;
1328         ch->video.stdid = V4L2_STD_UNKNOWN;
1329         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
1330
1331         /* Get the information about the standard */
1332         if (vpif_update_resolution(ch)) {
1333                 ret = -EINVAL;
1334         } else {
1335                 /* Configure the default format information */
1336                 vpif_config_format(ch);
1337
1338                 ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1339                                 video, s_dv_preset, preset);
1340         }
1341
1342         mutex_unlock(&common->lock);
1343
1344         return ret;
1345 }
1346 /**
1347  * vpif_g_dv_presets() - G_DV_PRESETS handler
1348  * @file: file ptr
1349  * @priv: file handle
1350  * @preset: input preset
1351  */
1352 static int vpif_g_dv_preset(struct file *file, void *priv,
1353                 struct v4l2_dv_preset *preset)
1354 {
1355         struct vpif_fh *fh = priv;
1356         struct channel_obj *ch = fh->channel;
1357
1358         preset->preset = ch->video.dv_preset;
1359
1360         return 0;
1361 }
1362 /**
1363  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1364  * @file: file ptr
1365  * @priv: file handle
1366  * @timings: digital video timings
1367  */
1368 static int vpif_s_dv_timings(struct file *file, void *priv,
1369                 struct v4l2_dv_timings *timings)
1370 {
1371         struct vpif_fh *fh = priv;
1372         struct channel_obj *ch = fh->channel;
1373         struct vpif_params *vpifparams = &ch->vpifparams;
1374         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1375         struct video_obj *vid_ch = &ch->video;
1376         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1377         int ret;
1378
1379         if (timings->type != V4L2_DV_BT_656_1120) {
1380                 vpif_dbg(2, debug, "Timing type not defined\n");
1381                 return -EINVAL;
1382         }
1383
1384         /* Configure subdevice timings, if any */
1385         ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1386                         video, s_dv_timings, timings);
1387         if (ret == -ENOIOCTLCMD) {
1388                 vpif_dbg(2, debug, "Custom DV timings not supported by "
1389                                 "subdevice\n");
1390                 return -EINVAL;
1391         }
1392         if (ret < 0) {
1393                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1394                 return ret;
1395         }
1396
1397         if (!(timings->bt.width && timings->bt.height &&
1398                                 (timings->bt.hbackporch ||
1399                                  timings->bt.hfrontporch ||
1400                                  timings->bt.hsync) &&
1401                                 timings->bt.vfrontporch &&
1402                                 (timings->bt.vbackporch ||
1403                                  timings->bt.vsync))) {
1404                 vpif_dbg(2, debug, "Timings for width, height, "
1405                                 "horizontal back porch, horizontal sync, "
1406                                 "horizontal front porch, vertical back porch, "
1407                                 "vertical sync and vertical back porch "
1408                                 "must be defined\n");
1409                 return -EINVAL;
1410         }
1411
1412         *bt = timings->bt;
1413
1414         /* Configure video port timings */
1415
1416         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1417                 bt->hsync - 8;
1418         std_info->sav2eav = bt->width;
1419
1420         std_info->l1 = 1;
1421         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1422
1423         if (bt->interlaced) {
1424                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1425                         std_info->vsize = bt->height * 2 +
1426                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1427                                 bt->il_vfrontporch + bt->il_vsync +
1428                                 bt->il_vbackporch;
1429                         std_info->l5 = std_info->vsize/2 -
1430                                 (bt->vfrontporch - 1);
1431                         std_info->l7 = std_info->vsize/2 + 1;
1432                         std_info->l9 = std_info->l7 + bt->il_vsync +
1433                                 bt->il_vbackporch + 1;
1434                         std_info->l11 = std_info->vsize -
1435                                 (bt->il_vfrontporch - 1);
1436                 } else {
1437                         vpif_dbg(2, debug, "Required timing values for "
1438                                         "interlaced BT format missing\n");
1439                         return -EINVAL;
1440                 }
1441         } else {
1442                 std_info->vsize = bt->height + bt->vfrontporch +
1443                         bt->vsync + bt->vbackporch;
1444                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1445         }
1446         strncpy(std_info->name, "Custom timings BT656/1120",
1447                         VPIF_MAX_NAME);
1448         std_info->width = bt->width;
1449         std_info->height = bt->height;
1450         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1451         std_info->ycmux_mode = 0;
1452         std_info->capture_format = 0;
1453         std_info->vbi_supported = 0;
1454         std_info->hd_sd = 1;
1455         std_info->stdid = 0;
1456         std_info->dv_preset = V4L2_DV_INVALID;
1457
1458         vid_ch->stdid = 0;
1459         vid_ch->dv_preset = V4L2_DV_INVALID;
1460
1461         return 0;
1462 }
1463
1464 /**
1465  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1466  * @file: file ptr
1467  * @priv: file handle
1468  * @timings: digital video timings
1469  */
1470 static int vpif_g_dv_timings(struct file *file, void *priv,
1471                 struct v4l2_dv_timings *timings)
1472 {
1473         struct vpif_fh *fh = priv;
1474         struct channel_obj *ch = fh->channel;
1475         struct video_obj *vid_ch = &ch->video;
1476         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1477
1478         timings->bt = *bt;
1479
1480         return 0;
1481 }
1482
1483 /*
1484  * vpif_g_chip_ident() - Identify the chip
1485  * @file: file ptr
1486  * @priv: file handle
1487  * @chip: chip identity
1488  *
1489  * Returns zero or -EINVAL if read operations fails.
1490  */
1491 static int vpif_g_chip_ident(struct file *file, void *priv,
1492                 struct v4l2_dbg_chip_ident *chip)
1493 {
1494         chip->ident = V4L2_IDENT_NONE;
1495         chip->revision = 0;
1496         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1497                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1498                 vpif_dbg(2, debug, "match_type is invalid.\n");
1499                 return -EINVAL;
1500         }
1501
1502         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1503                         g_chip_ident, chip);
1504 }
1505
1506 #ifdef CONFIG_VIDEO_ADV_DEBUG
1507 /*
1508  * vpif_dbg_g_register() - Read register
1509  * @file: file ptr
1510  * @priv: file handle
1511  * @reg: register to be read
1512  *
1513  * Debugging only
1514  * Returns zero or -EINVAL if read operations fails.
1515  */
1516 static int vpif_dbg_g_register(struct file *file, void *priv,
1517                 struct v4l2_dbg_register *reg){
1518         struct vpif_fh *fh = priv;
1519         struct channel_obj *ch = fh->channel;
1520         struct video_obj *vid_ch = &ch->video;
1521
1522         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1523                         g_register, reg);
1524 }
1525
1526 /*
1527  * vpif_dbg_s_register() - Write to register
1528  * @file: file ptr
1529  * @priv: file handle
1530  * @reg: register to be modified
1531  *
1532  * Debugging only
1533  * Returns zero or -EINVAL if write operations fails.
1534  */
1535 static int vpif_dbg_s_register(struct file *file, void *priv,
1536                 struct v4l2_dbg_register *reg){
1537         struct vpif_fh *fh = priv;
1538         struct channel_obj *ch = fh->channel;
1539         struct video_obj *vid_ch = &ch->video;
1540
1541         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1542                         s_register, reg);
1543 }
1544 #endif
1545
1546 /*
1547  * vpif_log_status() - Status information
1548  * @file: file ptr
1549  * @priv: file handle
1550  *
1551  * Returns zero.
1552  */
1553 static int vpif_log_status(struct file *filep, void *priv)
1554 {
1555         /* status for sub devices */
1556         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1557
1558         return 0;
1559 }
1560
1561 /* vpif display ioctl operations */
1562 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1563         .vidioc_querycap                = vpif_querycap,
1564         .vidioc_g_priority              = vpif_g_priority,
1565         .vidioc_s_priority              = vpif_s_priority,
1566         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1567         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1568         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1569         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1570         .vidioc_reqbufs                 = vpif_reqbufs,
1571         .vidioc_querybuf                = vpif_querybuf,
1572         .vidioc_qbuf                    = vpif_qbuf,
1573         .vidioc_dqbuf                   = vpif_dqbuf,
1574         .vidioc_streamon                = vpif_streamon,
1575         .vidioc_streamoff               = vpif_streamoff,
1576         .vidioc_s_std                   = vpif_s_std,
1577         .vidioc_g_std                   = vpif_g_std,
1578         .vidioc_enum_output             = vpif_enum_output,
1579         .vidioc_s_output                = vpif_s_output,
1580         .vidioc_g_output                = vpif_g_output,
1581         .vidioc_cropcap                 = vpif_cropcap,
1582         .vidioc_enum_dv_presets         = vpif_enum_dv_presets,
1583         .vidioc_s_dv_preset             = vpif_s_dv_preset,
1584         .vidioc_g_dv_preset             = vpif_g_dv_preset,
1585         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1586         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1587         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1588 #ifdef CONFIG_VIDEO_ADV_DEBUG
1589         .vidioc_g_register              = vpif_dbg_g_register,
1590         .vidioc_s_register              = vpif_dbg_s_register,
1591 #endif
1592         .vidioc_log_status              = vpif_log_status,
1593 };
1594
1595 static const struct v4l2_file_operations vpif_fops = {
1596         .owner          = THIS_MODULE,
1597         .open           = vpif_open,
1598         .release        = vpif_release,
1599         .unlocked_ioctl = video_ioctl2,
1600         .mmap           = vpif_mmap,
1601         .poll           = vpif_poll
1602 };
1603
1604 static struct video_device vpif_video_template = {
1605         .name           = "vpif",
1606         .fops           = &vpif_fops,
1607         .ioctl_ops      = &vpif_ioctl_ops,
1608         .tvnorms        = DM646X_V4L2_STD,
1609         .current_norm   = V4L2_STD_625_50,
1610
1611 };
1612
1613 /*Configure the channels, buffer sizei, request irq */
1614 static int initialize_vpif(void)
1615 {
1616         int free_channel_objects_index;
1617         int free_buffer_channel_index;
1618         int free_buffer_index;
1619         int err = 0, i, j;
1620
1621         /* Default number of buffers should be 3 */
1622         if ((ch2_numbuffers > 0) &&
1623             (ch2_numbuffers < config_params.min_numbuffers))
1624                 ch2_numbuffers = config_params.min_numbuffers;
1625         if ((ch3_numbuffers > 0) &&
1626             (ch3_numbuffers < config_params.min_numbuffers))
1627                 ch3_numbuffers = config_params.min_numbuffers;
1628
1629         /* Set buffer size to min buffers size if invalid buffer size is
1630          * given */
1631         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1632                 ch2_bufsize =
1633                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1634         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1635                 ch3_bufsize =
1636                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1637
1638         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1639
1640         if (ch2_numbuffers) {
1641                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1642                                                         ch2_bufsize;
1643         }
1644         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1645
1646         if (ch3_numbuffers) {
1647                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1648                                                         ch3_bufsize;
1649         }
1650
1651         /* Allocate memory for six channel objects */
1652         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1653                 vpif_obj.dev[i] =
1654                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1655                 /* If memory allocation fails, return error */
1656                 if (!vpif_obj.dev[i]) {
1657                         free_channel_objects_index = i;
1658                         err = -ENOMEM;
1659                         goto vpif_init_free_channel_objects;
1660                 }
1661         }
1662
1663         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1664         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1665         free_buffer_index = config_params.numbuffers[i - 1];
1666
1667         return 0;
1668
1669 vpif_init_free_channel_objects:
1670         for (j = 0; j < free_channel_objects_index; j++)
1671                 kfree(vpif_obj.dev[j]);
1672         return err;
1673 }
1674
1675 /*
1676  * vpif_probe: This function creates device entries by register itself to the
1677  * V4L2 driver and initializes fields of each channel objects
1678  */
1679 static __init int vpif_probe(struct platform_device *pdev)
1680 {
1681         struct vpif_subdev_info *subdevdata;
1682         struct vpif_display_config *config;
1683         int i, j = 0, k, q, m, err = 0;
1684         struct i2c_adapter *i2c_adap;
1685         struct common_obj *common;
1686         struct channel_obj *ch;
1687         struct video_device *vfd;
1688         struct resource *res;
1689         int subdev_count;
1690
1691         vpif_dev = &pdev->dev;
1692
1693         err = initialize_vpif();
1694
1695         if (err) {
1696                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1697                 return err;
1698         }
1699
1700         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1701         if (err) {
1702                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1703                 return err;
1704         }
1705
1706         k = 0;
1707         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1708                 for (i = res->start; i <= res->end; i++) {
1709                         if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
1710                                         "DM646x_Display",
1711                                 (void *)(&vpif_obj.dev[k]->channel_id))) {
1712                                 err = -EBUSY;
1713                                 goto vpif_int_err;
1714                         }
1715                 }
1716                 k++;
1717         }
1718
1719         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1720
1721                 /* Get the pointer to the channel object */
1722                 ch = vpif_obj.dev[i];
1723
1724                 /* Allocate memory for video device */
1725                 vfd = video_device_alloc();
1726                 if (vfd == NULL) {
1727                         for (j = 0; j < i; j++) {
1728                                 ch = vpif_obj.dev[j];
1729                                 video_device_release(ch->video_dev);
1730                         }
1731                         err = -ENOMEM;
1732                         goto vpif_int_err;
1733                 }
1734
1735                 /* Initialize field of video device */
1736                 *vfd = vpif_video_template;
1737                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1738                 vfd->release = video_device_release;
1739                 snprintf(vfd->name, sizeof(vfd->name),
1740                          "DM646x_VPIFDisplay_DRIVER_V%s",
1741                          VPIF_DISPLAY_VERSION);
1742
1743                 /* Set video_dev to the video device */
1744                 ch->video_dev = vfd;
1745         }
1746
1747         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1748                 ch = vpif_obj.dev[j];
1749                 /* Initialize field of the channel objects */
1750                 atomic_set(&ch->usrs, 0);
1751                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1752                         ch->common[k].numbuffers = 0;
1753                         common = &ch->common[k];
1754                         common->io_usrs = 0;
1755                         common->started = 0;
1756                         spin_lock_init(&common->irqlock);
1757                         mutex_init(&common->lock);
1758                         common->numbuffers = 0;
1759                         common->set_addr = NULL;
1760                         common->ytop_off = common->ybtm_off = 0;
1761                         common->ctop_off = common->cbtm_off = 0;
1762                         common->cur_frm = common->next_frm = NULL;
1763                         memset(&common->fmt, 0, sizeof(common->fmt));
1764                         common->numbuffers = config_params.numbuffers[k];
1765
1766                 }
1767                 ch->initialized = 0;
1768                 ch->channel_id = j;
1769                 if (j < 2)
1770                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1771                             config_params.numbuffers[ch->channel_id];
1772                 else
1773                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1774
1775                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1776
1777                 /* Initialize prio member of channel object */
1778                 v4l2_prio_init(&ch->prio);
1779                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1780                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1781                 /* Locking in file operations other than ioctl should be done
1782                    by the driver, not the V4L2 core.
1783                    This driver needs auditing so that this flag can be removed. */
1784                 set_bit(V4L2_FL_LOCK_ALL_FOPS, &ch->video_dev->flags);
1785                 ch->video_dev->lock = &common->lock;
1786
1787                 /* register video device */
1788                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1789                                 (int)ch, (int)&ch->video_dev);
1790
1791                 err = video_register_device(ch->video_dev,
1792                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1793                 if (err < 0)
1794                         goto probe_out;
1795
1796                 video_set_drvdata(ch->video_dev, ch);
1797         }
1798
1799         i2c_adap = i2c_get_adapter(1);
1800         config = pdev->dev.platform_data;
1801         subdev_count = config->subdev_count;
1802         subdevdata = config->subdevinfo;
1803         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1804                                                                 GFP_KERNEL);
1805         if (vpif_obj.sd == NULL) {
1806                 vpif_err("unable to allocate memory for subdevice pointers\n");
1807                 err = -ENOMEM;
1808                 goto probe_out;
1809         }
1810
1811         for (i = 0; i < subdev_count; i++) {
1812                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1813                                                 i2c_adap,
1814                                                 &subdevdata[i].board_info,
1815                                                 NULL);
1816                 if (!vpif_obj.sd[i]) {
1817                         vpif_err("Error registering v4l2 subdevice\n");
1818                         goto probe_subdev_out;
1819                 }
1820
1821                 if (vpif_obj.sd[i])
1822                         vpif_obj.sd[i]->grp_id = 1 << i;
1823         }
1824
1825         v4l2_info(&vpif_obj.v4l2_dev,
1826                         "DM646x VPIF display driver initialized\n");
1827         return 0;
1828
1829 probe_subdev_out:
1830         kfree(vpif_obj.sd);
1831 probe_out:
1832         for (k = 0; k < j; k++) {
1833                 ch = vpif_obj.dev[k];
1834                 video_unregister_device(ch->video_dev);
1835                 video_device_release(ch->video_dev);
1836                 ch->video_dev = NULL;
1837         }
1838 vpif_int_err:
1839         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1840         vpif_err("VPIF IRQ request failed\n");
1841         for (q = k; k >= 0; k--) {
1842                 for (m = i; m >= res->start; m--)
1843                         free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id));
1844                 res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1);
1845                 m = res->end;
1846         }
1847
1848         return err;
1849 }
1850
1851 /*
1852  * vpif_remove: It un-register channels from V4L2 driver
1853  */
1854 static int vpif_remove(struct platform_device *device)
1855 {
1856         struct channel_obj *ch;
1857         int i;
1858
1859         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1860
1861         /* un-register device */
1862         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1863                 /* Get the pointer to the channel object */
1864                 ch = vpif_obj.dev[i];
1865                 /* Unregister video device */
1866                 video_unregister_device(ch->video_dev);
1867
1868                 ch->video_dev = NULL;
1869         }
1870
1871         return 0;
1872 }
1873
1874 static __refdata struct platform_driver vpif_driver = {
1875         .driver = {
1876                         .name   = "vpif_display",
1877                         .owner  = THIS_MODULE,
1878         },
1879         .probe  = vpif_probe,
1880         .remove = vpif_remove,
1881 };
1882
1883 static __init int vpif_init(void)
1884 {
1885         return platform_driver_register(&vpif_driver);
1886 }
1887
1888 /*
1889  * vpif_cleanup: This function un-registers device and driver to the kernel,
1890  * frees requested irq handler and de-allocates memory allocated for channel
1891  * objects.
1892  */
1893 static void vpif_cleanup(void)
1894 {
1895         struct platform_device *pdev;
1896         struct resource *res;
1897         int irq_num;
1898         int i = 0;
1899
1900         pdev = container_of(vpif_dev, struct platform_device, dev);
1901
1902         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
1903                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
1904                         free_irq(irq_num,
1905                                  (void *)(&vpif_obj.dev[i]->channel_id));
1906                 i++;
1907         }
1908
1909         platform_driver_unregister(&vpif_driver);
1910         kfree(vpif_obj.sd);
1911         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
1912                 kfree(vpif_obj.dev[i]);
1913 }
1914
1915 module_init(vpif_init);
1916 module_exit(vpif_cleanup);