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