linux/drivers/media/video/davinci/vpif_capture.c
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   1/*
   2 * Copyright (C) 2009 Texas Instruments Inc
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 *
  18 * TODO : add support for VBI & HBI data service
  19 *        add static buffer allocation
  20 */
  21#include <linux/kernel.h>
  22#include <linux/init.h>
  23#include <linux/module.h>
  24#include <linux/errno.h>
  25#include <linux/fs.h>
  26#include <linux/mm.h>
  27#include <linux/interrupt.h>
  28#include <linux/workqueue.h>
  29#include <linux/string.h>
  30#include <linux/videodev2.h>
  31#include <linux/wait.h>
  32#include <linux/time.h>
  33#include <linux/i2c.h>
  34#include <linux/platform_device.h>
  35#include <linux/io.h>
  36#include <linux/version.h>
  37#include <linux/slab.h>
  38#include <media/v4l2-device.h>
  39#include <media/v4l2-ioctl.h>
  40
  41#include "vpif_capture.h"
  42#include "vpif.h"
  43
  44MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
  45MODULE_LICENSE("GPL");
  46
  47#define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  48#define vpif_dbg(level, debug, fmt, arg...)     \
  49                v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  50
  51static int debug = 1;
  52static u32 ch0_numbuffers = 3;
  53static u32 ch1_numbuffers = 3;
  54static u32 ch0_bufsize = 1920 * 1080 * 2;
  55static u32 ch1_bufsize = 720 * 576 * 2;
  56
  57module_param(debug, int, 0644);
  58module_param(ch0_numbuffers, uint, S_IRUGO);
  59module_param(ch1_numbuffers, uint, S_IRUGO);
  60module_param(ch0_bufsize, uint, S_IRUGO);
  61module_param(ch1_bufsize, uint, S_IRUGO);
  62
  63MODULE_PARM_DESC(debug, "Debug level 0-1");
  64MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
  65MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
  66MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
  67MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
  68
  69static struct vpif_config_params config_params = {
  70        .min_numbuffers = 3,
  71        .numbuffers[0] = 3,
  72        .numbuffers[1] = 3,
  73        .min_bufsize[0] = 720 * 480 * 2,
  74        .min_bufsize[1] = 720 * 480 * 2,
  75        .channel_bufsize[0] = 1920 * 1080 * 2,
  76        .channel_bufsize[1] = 720 * 576 * 2,
  77};
  78
  79/* global variables */
  80static struct vpif_device vpif_obj = { {NULL} };
  81static struct device *vpif_dev;
  82
  83/**
  84 * ch_params: video standard configuration parameters for vpif
  85 */
  86static const struct vpif_channel_config_params ch_params[] = {
  87        {
  88                "NTSC_M", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266,
  89                286, 525, 525, 0, 1, 0, V4L2_STD_525_60,
  90        },
  91        {
  92                "PAL_BDGHIK", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313,
  93                336, 624, 625, 0, 1, 0, V4L2_STD_625_50,
  94        },
  95};
  96
  97/**
  98 * vpif_uservirt_to_phys : translate user/virtual address to phy address
  99 * @virtp: user/virtual address
 100 *
 101 * This inline function is used to convert user space virtual address to
 102 * physical address.
 103 */
 104static inline u32 vpif_uservirt_to_phys(u32 virtp)
 105{
 106        unsigned long physp = 0;
 107        struct mm_struct *mm = current->mm;
 108        struct vm_area_struct *vma;
 109
 110        vma = find_vma(mm, virtp);
 111
 112        /* For kernel direct-mapped memory, take the easy way */
 113        if (virtp >= PAGE_OFFSET)
 114                physp = virt_to_phys((void *)virtp);
 115        else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff))
 116                /**
 117                 * this will catch, kernel-allocated, mmaped-to-usermode
 118                 * addresses
 119                 */
 120                physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
 121        else {
 122                /* otherwise, use get_user_pages() for general userland pages */
 123                int res, nr_pages = 1;
 124                        struct page *pages;
 125
 126                down_read(&current->mm->mmap_sem);
 127
 128                res = get_user_pages(current, current->mm,
 129                                     virtp, nr_pages, 1, 0, &pages, NULL);
 130                up_read(&current->mm->mmap_sem);
 131
 132                if (res == nr_pages)
 133                        physp = __pa(page_address(&pages[0]) +
 134                                     (virtp & ~PAGE_MASK));
 135                else {
 136                        vpif_err("get_user_pages failed\n");
 137                        return 0;
 138                }
 139        }
 140        return physp;
 141}
 142
 143/**
 144 * buffer_prepare :  callback function for buffer prepare
 145 * @q : buffer queue ptr
 146 * @vb: ptr to video buffer
 147 * @field: field info
 148 *
 149 * This is the callback function for buffer prepare when videobuf_qbuf()
 150 * function is called. The buffer is prepared and user space virtual address
 151 * or user address is converted into  physical address
 152 */
 153static int vpif_buffer_prepare(struct videobuf_queue *q,
 154                               struct videobuf_buffer *vb,
 155                               enum v4l2_field field)
 156{
 157        /* Get the file handle object and channel object */
 158        struct vpif_fh *fh = q->priv_data;
 159        struct channel_obj *ch = fh->channel;
 160        struct common_obj *common;
 161        unsigned long addr;
 162
 163
 164        vpif_dbg(2, debug, "vpif_buffer_prepare\n");
 165
 166        common = &ch->common[VPIF_VIDEO_INDEX];
 167
 168        /* If buffer is not initialized, initialize it */
 169        if (VIDEOBUF_NEEDS_INIT == vb->state) {
 170                vb->width = common->width;
 171                vb->height = common->height;
 172                vb->size = vb->width * vb->height;
 173                vb->field = field;
 174        }
 175        vb->state = VIDEOBUF_PREPARED;
 176        /**
 177         * if user pointer memory mechanism is used, get the physical
 178         * address of the buffer
 179         */
 180        if (V4L2_MEMORY_USERPTR == common->memory) {
 181                if (0 == vb->baddr) {
 182                        vpif_dbg(1, debug, "buffer address is 0\n");
 183                        return -EINVAL;
 184
 185                }
 186                vb->boff = vpif_uservirt_to_phys(vb->baddr);
 187                if (!IS_ALIGNED(vb->boff, 8))
 188                        goto exit;
 189        }
 190
 191        addr = vb->boff;
 192        if (q->streaming) {
 193                if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 194                    !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 195                    !IS_ALIGNED((addr + common->ctop_off), 8) ||
 196                    !IS_ALIGNED((addr + common->cbtm_off), 8))
 197                        goto exit;
 198        }
 199        return 0;
 200exit:
 201        vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
 202        return -EINVAL;
 203}
 204
 205/**
 206 * vpif_buffer_setup : Callback function for buffer setup.
 207 * @q: buffer queue ptr
 208 * @count: number of buffers
 209 * @size: size of the buffer
 210 *
 211 * This callback function is called when reqbuf() is called to adjust
 212 * the buffer count and buffer size
 213 */
 214static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
 215                             unsigned int *size)
 216{
 217        /* Get the file handle object and channel object */
 218        struct vpif_fh *fh = q->priv_data;
 219        struct channel_obj *ch = fh->channel;
 220        struct common_obj *common;
 221
 222        common = &ch->common[VPIF_VIDEO_INDEX];
 223
 224        vpif_dbg(2, debug, "vpif_buffer_setup\n");
 225
 226        /* If memory type is not mmap, return */
 227        if (V4L2_MEMORY_MMAP != common->memory)
 228                return 0;
 229
 230        /* Calculate the size of the buffer */
 231        *size = config_params.channel_bufsize[ch->channel_id];
 232
 233        if (*count < config_params.min_numbuffers)
 234                *count = config_params.min_numbuffers;
 235        return 0;
 236}
 237
 238/**
 239 * vpif_buffer_queue : Callback function to add buffer to DMA queue
 240 * @q: ptr to videobuf_queue
 241 * @vb: ptr to videobuf_buffer
 242 */
 243static void vpif_buffer_queue(struct videobuf_queue *q,
 244                              struct videobuf_buffer *vb)
 245{
 246        /* Get the file handle object and channel object */
 247        struct vpif_fh *fh = q->priv_data;
 248        struct channel_obj *ch = fh->channel;
 249        struct common_obj *common;
 250
 251        common = &ch->common[VPIF_VIDEO_INDEX];
 252
 253        vpif_dbg(2, debug, "vpif_buffer_queue\n");
 254
 255        /* add the buffer to the DMA queue */
 256        list_add_tail(&vb->queue, &common->dma_queue);
 257        /* Change state of the buffer */
 258        vb->state = VIDEOBUF_QUEUED;
 259}
 260
 261/**
 262 * vpif_buffer_release : Callback function to free buffer
 263 * @q: buffer queue ptr
 264 * @vb: ptr to video buffer
 265 *
 266 * This function is called from the videobuf layer to free memory
 267 * allocated to  the buffers
 268 */
 269static void vpif_buffer_release(struct videobuf_queue *q,
 270                                struct videobuf_buffer *vb)
 271{
 272        /* Get the file handle object and channel object */
 273        struct vpif_fh *fh = q->priv_data;
 274        struct channel_obj *ch = fh->channel;
 275        struct common_obj *common;
 276
 277        common = &ch->common[VPIF_VIDEO_INDEX];
 278
 279        videobuf_dma_contig_free(q, vb);
 280        vb->state = VIDEOBUF_NEEDS_INIT;
 281}
 282
 283static struct videobuf_queue_ops video_qops = {
 284        .buf_setup = vpif_buffer_setup,
 285        .buf_prepare = vpif_buffer_prepare,
 286        .buf_queue = vpif_buffer_queue,
 287        .buf_release = vpif_buffer_release,
 288};
 289
 290static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
 291        { {1, 1} };
 292
 293/**
 294 * vpif_process_buffer_complete: process a completed buffer
 295 * @common: ptr to common channel object
 296 *
 297 * This function time stamp the buffer and mark it as DONE. It also
 298 * wake up any process waiting on the QUEUE and set the next buffer
 299 * as current
 300 */
 301static void vpif_process_buffer_complete(struct common_obj *common)
 302{
 303        do_gettimeofday(&common->cur_frm->ts);
 304        common->cur_frm->state = VIDEOBUF_DONE;
 305        wake_up_interruptible(&common->cur_frm->done);
 306        /* Make curFrm pointing to nextFrm */
 307        common->cur_frm = common->next_frm;
 308}
 309
 310/**
 311 * vpif_schedule_next_buffer: set next buffer address for capture
 312 * @common : ptr to common channel object
 313 *
 314 * This function will get next buffer from the dma queue and
 315 * set the buffer address in the vpif register for capture.
 316 * the buffer is marked active
 317 */
 318static void vpif_schedule_next_buffer(struct common_obj *common)
 319{
 320        unsigned long addr = 0;
 321
 322        common->next_frm = list_entry(common->dma_queue.next,
 323                                     struct videobuf_buffer, queue);
 324        /* Remove that buffer from the buffer queue */
 325        list_del(&common->next_frm->queue);
 326        common->next_frm->state = VIDEOBUF_ACTIVE;
 327        if (V4L2_MEMORY_USERPTR == common->memory)
 328                addr = common->next_frm->boff;
 329        else
 330                addr = videobuf_to_dma_contig(common->next_frm);
 331
 332        /* Set top and bottom field addresses in VPIF registers */
 333        common->set_addr(addr + common->ytop_off,
 334                         addr + common->ybtm_off,
 335                         addr + common->ctop_off,
 336                         addr + common->cbtm_off);
 337}
 338
 339/**
 340 * vpif_channel_isr : ISR handler for vpif capture
 341 * @irq: irq number
 342 * @dev_id: dev_id ptr
 343 *
 344 * It changes status of the captured buffer, takes next buffer from the queue
 345 * and sets its address in VPIF  registers
 346 */
 347static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 348{
 349        struct vpif_device *dev = &vpif_obj;
 350        struct common_obj *common;
 351        struct channel_obj *ch;
 352        enum v4l2_field field;
 353        int channel_id = 0;
 354        int fid = -1, i;
 355
 356        channel_id = *(int *)(dev_id);
 357        ch = dev->dev[channel_id];
 358
 359        field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 360
 361        for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
 362                common = &ch->common[i];
 363                /* skip If streaming is not started in this channel */
 364                if (0 == common->started)
 365                        continue;
 366
 367                /* Check the field format */
 368                if (1 == ch->vpifparams.std_info.frm_fmt) {
 369                        /* Progressive mode */
 370                        if (list_empty(&common->dma_queue))
 371                                continue;
 372
 373                        if (!channel_first_int[i][channel_id])
 374                                vpif_process_buffer_complete(common);
 375
 376                        channel_first_int[i][channel_id] = 0;
 377
 378                        vpif_schedule_next_buffer(common);
 379
 380
 381                        channel_first_int[i][channel_id] = 0;
 382                } else {
 383                        /**
 384                         * Interlaced mode. If it is first interrupt, ignore
 385                         * it
 386                         */
 387                        if (channel_first_int[i][channel_id]) {
 388                                channel_first_int[i][channel_id] = 0;
 389                                continue;
 390                        }
 391                        if (0 == i) {
 392                                ch->field_id ^= 1;
 393                                /* Get field id from VPIF registers */
 394                                fid = vpif_channel_getfid(ch->channel_id);
 395                                if (fid != ch->field_id) {
 396                                        /**
 397                                         * If field id does not match stored
 398                                         * field id, make them in sync
 399                                         */
 400                                        if (0 == fid)
 401                                                ch->field_id = fid;
 402                                        return IRQ_HANDLED;
 403                                }
 404                        }
 405                        /* device field id and local field id are in sync */
 406                        if (0 == fid) {
 407                                /* this is even field */
 408                                if (common->cur_frm == common->next_frm)
 409                                        continue;
 410
 411                                /* mark the current buffer as done */
 412                                vpif_process_buffer_complete(common);
 413                        } else if (1 == fid) {
 414                                /* odd field */
 415                                if (list_empty(&common->dma_queue) ||
 416                                    (common->cur_frm != common->next_frm))
 417                                        continue;
 418
 419                                vpif_schedule_next_buffer(common);
 420                        }
 421                }
 422        }
 423        return IRQ_HANDLED;
 424}
 425
 426/**
 427 * vpif_update_std_info() - update standard related info
 428 * @ch: ptr to channel object
 429 *
 430 * For a given standard selected by application, update values
 431 * in the device data structures
 432 */
 433static int vpif_update_std_info(struct channel_obj *ch)
 434{
 435        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 436        struct vpif_params *vpifparams = &ch->vpifparams;
 437        const struct vpif_channel_config_params *config;
 438        struct vpif_channel_config_params *std_info;
 439        struct video_obj *vid_ch = &ch->video;
 440        int index;
 441
 442        vpif_dbg(2, debug, "vpif_update_std_info\n");
 443
 444        std_info = &vpifparams->std_info;
 445
 446        for (index = 0; index < ARRAY_SIZE(ch_params); index++) {
 447                config = &ch_params[index];
 448                if (config->stdid & vid_ch->stdid) {
 449                        memcpy(std_info, config, sizeof(*config));
 450                        break;
 451                }
 452        }
 453
 454        /* standard not found */
 455        if (index == ARRAY_SIZE(ch_params))
 456                return -EINVAL;
 457
 458        common->fmt.fmt.pix.width = std_info->width;
 459        common->width = std_info->width;
 460        common->fmt.fmt.pix.height = std_info->height;
 461        common->height = std_info->height;
 462        common->fmt.fmt.pix.bytesperline = std_info->width;
 463        vpifparams->video_params.hpitch = std_info->width;
 464        vpifparams->video_params.storage_mode = std_info->frm_fmt;
 465        return 0;
 466}
 467
 468/**
 469 * vpif_calculate_offsets : This function calculates buffers offsets
 470 * @ch : ptr to channel object
 471 *
 472 * This function calculates buffer offsets for Y and C in the top and
 473 * bottom field
 474 */
 475static void vpif_calculate_offsets(struct channel_obj *ch)
 476{
 477        unsigned int hpitch, vpitch, sizeimage;
 478        struct video_obj *vid_ch = &(ch->video);
 479        struct vpif_params *vpifparams = &ch->vpifparams;
 480        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 481        enum v4l2_field field = common->fmt.fmt.pix.field;
 482
 483        vpif_dbg(2, debug, "vpif_calculate_offsets\n");
 484
 485        if (V4L2_FIELD_ANY == field) {
 486                if (vpifparams->std_info.frm_fmt)
 487                        vid_ch->buf_field = V4L2_FIELD_NONE;
 488                else
 489                        vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 490        } else
 491                vid_ch->buf_field = common->fmt.fmt.pix.field;
 492
 493        if (V4L2_MEMORY_USERPTR == common->memory)
 494                sizeimage = common->fmt.fmt.pix.sizeimage;
 495        else
 496                sizeimage = config_params.channel_bufsize[ch->channel_id];
 497
 498        hpitch = common->fmt.fmt.pix.bytesperline;
 499        vpitch = sizeimage / (hpitch * 2);
 500
 501        if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 502            (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 503                /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 504                common->ytop_off = 0;
 505                common->ybtm_off = hpitch;
 506                common->ctop_off = sizeimage / 2;
 507                common->cbtm_off = sizeimage / 2 + hpitch;
 508        } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 509                /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 510                common->ytop_off = 0;
 511                common->ybtm_off = sizeimage / 4;
 512                common->ctop_off = sizeimage / 2;
 513                common->cbtm_off = common->ctop_off + sizeimage / 4;
 514        } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 515                /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 516                common->ybtm_off = 0;
 517                common->ytop_off = sizeimage / 4;
 518                common->cbtm_off = sizeimage / 2;
 519                common->ctop_off = common->cbtm_off + sizeimage / 4;
 520        }
 521        if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 522            (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
 523                vpifparams->video_params.storage_mode = 1;
 524        else
 525                vpifparams->video_params.storage_mode = 0;
 526
 527        if (1 == vpifparams->std_info.frm_fmt)
 528                vpifparams->video_params.hpitch =
 529                    common->fmt.fmt.pix.bytesperline;
 530        else {
 531                if ((field == V4L2_FIELD_ANY)
 532                    || (field == V4L2_FIELD_INTERLACED))
 533                        vpifparams->video_params.hpitch =
 534                            common->fmt.fmt.pix.bytesperline * 2;
 535                else
 536                        vpifparams->video_params.hpitch =
 537                            common->fmt.fmt.pix.bytesperline;
 538        }
 539
 540        ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
 541}
 542
 543/**
 544 * vpif_config_format: configure default frame format in the device
 545 * ch : ptr to channel object
 546 */
 547static void vpif_config_format(struct channel_obj *ch)
 548{
 549        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 550
 551        vpif_dbg(2, debug, "vpif_config_format\n");
 552
 553        common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 554        if (config_params.numbuffers[ch->channel_id] == 0)
 555                common->memory = V4L2_MEMORY_USERPTR;
 556        else
 557                common->memory = V4L2_MEMORY_MMAP;
 558
 559        common->fmt.fmt.pix.sizeimage
 560            = config_params.channel_bufsize[ch->channel_id];
 561
 562        if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 563                common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 564        else
 565                common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 566        common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 567}
 568
 569/**
 570 * vpif_get_default_field() - Get default field type based on interface
 571 * @vpif_params - ptr to vpif params
 572 */
 573static inline enum v4l2_field vpif_get_default_field(
 574                                struct vpif_interface *iface)
 575{
 576        return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
 577                                                V4L2_FIELD_INTERLACED;
 578}
 579
 580/**
 581 * vpif_check_format()  - check given pixel format for compatibility
 582 * @ch - channel  ptr
 583 * @pixfmt - Given pixel format
 584 * @update - update the values as per hardware requirement
 585 *
 586 * Check the application pixel format for S_FMT and update the input
 587 * values as per hardware limits for TRY_FMT. The default pixel and
 588 * field format is selected based on interface type.
 589 */
 590static int vpif_check_format(struct channel_obj *ch,
 591                             struct v4l2_pix_format *pixfmt,
 592                             int update)
 593{
 594        struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 595        struct vpif_params *vpif_params = &ch->vpifparams;
 596        enum v4l2_field field = pixfmt->field;
 597        u32 sizeimage, hpitch, vpitch;
 598        int ret = -EINVAL;
 599
 600        vpif_dbg(2, debug, "vpif_check_format\n");
 601        /**
 602         * first check for the pixel format. If if_type is Raw bayer,
 603         * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
 604         * V4L2_PIX_FMT_YUV422P is supported
 605         */
 606        if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
 607                if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
 608                        if (!update) {
 609                                vpif_dbg(2, debug, "invalid pix format\n");
 610                                goto exit;
 611                        }
 612                        pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 613                }
 614        } else {
 615                if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
 616                        if (!update) {
 617                                vpif_dbg(2, debug, "invalid pixel format\n");
 618                                goto exit;
 619                        }
 620                        pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 621                }
 622        }
 623
 624        if (!(VPIF_VALID_FIELD(field))) {
 625                if (!update) {
 626                        vpif_dbg(2, debug, "invalid field format\n");
 627                        goto exit;
 628                }
 629                /**
 630                 * By default use FIELD_NONE for RAW Bayer capture
 631                 * and FIELD_INTERLACED for other interfaces
 632                 */
 633                field = vpif_get_default_field(&vpif_params->iface);
 634        } else if (field == V4L2_FIELD_ANY)
 635                /* unsupported field. Use default */
 636                field = vpif_get_default_field(&vpif_params->iface);
 637
 638        /* validate the hpitch */
 639        hpitch = pixfmt->bytesperline;
 640        if (hpitch < vpif_params->std_info.width) {
 641                if (!update) {
 642                        vpif_dbg(2, debug, "invalid hpitch\n");
 643                        goto exit;
 644                }
 645                hpitch = vpif_params->std_info.width;
 646        }
 647
 648        if (V4L2_MEMORY_USERPTR == common->memory)
 649                sizeimage = pixfmt->sizeimage;
 650        else
 651                sizeimage = config_params.channel_bufsize[ch->channel_id];
 652
 653        vpitch = sizeimage / (hpitch * 2);
 654
 655        /* validate the vpitch */
 656        if (vpitch < vpif_params->std_info.height) {
 657                if (!update) {
 658                        vpif_dbg(2, debug, "Invalid vpitch\n");
 659                        goto exit;
 660                }
 661                vpitch = vpif_params->std_info.height;
 662        }
 663
 664        /* Check for 8 byte alignment */
 665        if (!ALIGN(hpitch, 8)) {
 666                if (!update) {
 667                        vpif_dbg(2, debug, "invalid pitch alignment\n");
 668                        goto exit;
 669                }
 670                /* adjust to next 8 byte boundary */
 671                hpitch = (((hpitch + 7) / 8) * 8);
 672        }
 673        /* if update is set, modify the bytesperline and sizeimage */
 674        if (update) {
 675                pixfmt->bytesperline = hpitch;
 676                pixfmt->sizeimage = hpitch * vpitch * 2;
 677        }
 678        /**
 679         * Image width and height is always based on current standard width and
 680         * height
 681         */
 682        pixfmt->width = common->fmt.fmt.pix.width;
 683        pixfmt->height = common->fmt.fmt.pix.height;
 684        return 0;
 685exit:
 686        return ret;
 687}
 688
 689/**
 690 * vpif_config_addr() - function to configure buffer address in vpif
 691 * @ch - channel ptr
 692 * @muxmode - channel mux mode
 693 */
 694static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 695{
 696        struct common_obj *common;
 697
 698        vpif_dbg(2, debug, "vpif_config_addr\n");
 699
 700        common = &(ch->common[VPIF_VIDEO_INDEX]);
 701
 702        if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
 703                common->set_addr = ch1_set_videobuf_addr;
 704        else if (2 == muxmode)
 705                common->set_addr = ch0_set_videobuf_addr_yc_nmux;
 706        else
 707                common->set_addr = ch0_set_videobuf_addr;
 708}
 709
 710/**
 711 * vpfe_mmap : It is used to map kernel space buffers into user spaces
 712 * @filep: file pointer
 713 * @vma: ptr to vm_area_struct
 714 */
 715static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 716{
 717        /* Get the channel object and file handle object */
 718        struct vpif_fh *fh = filep->private_data;
 719        struct channel_obj *ch = fh->channel;
 720        struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 721
 722        vpif_dbg(2, debug, "vpif_mmap\n");
 723
 724        return videobuf_mmap_mapper(&common->buffer_queue, vma);
 725}
 726
 727/**
 728 * vpif_poll: It is used for select/poll system call
 729 * @filep: file pointer
 730 * @wait: poll table to wait
 731 */
 732static unsigned int vpif_poll(struct file *filep, poll_table * wait)
 733{
 734        int err = 0;
 735        struct vpif_fh *fh = filep->private_data;
 736        struct channel_obj *channel = fh->channel;
 737        struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
 738
 739        vpif_dbg(2, debug, "vpif_poll\n");
 740
 741        if (common->started)
 742                err = videobuf_poll_stream(filep, &common->buffer_queue, wait);
 743
 744        return 0;
 745}
 746
 747/**
 748 * vpif_open : vpif open handler
 749 * @filep: file ptr
 750 *
 751 * It creates object of file handle structure and stores it in private_data
 752 * member of filepointer
 753 */
 754static int vpif_open(struct file *filep)
 755{
 756        struct vpif_capture_config *config = vpif_dev->platform_data;
 757        struct video_device *vdev = video_devdata(filep);
 758        struct common_obj *common;
 759        struct video_obj *vid_ch;
 760        struct channel_obj *ch;
 761        struct vpif_fh *fh;
 762        int i, ret = 0;
 763
 764        vpif_dbg(2, debug, "vpif_open\n");
 765
 766        ch = video_get_drvdata(vdev);
 767
 768        vid_ch = &ch->video;
 769        common = &ch->common[VPIF_VIDEO_INDEX];
 770
 771        if (mutex_lock_interruptible(&common->lock))
 772                return -ERESTARTSYS;
 773
 774        if (NULL == ch->curr_subdev_info) {
 775                /**
 776                 * search through the sub device to see a registered
 777                 * sub device and make it as current sub device
 778                 */
 779                for (i = 0; i < config->subdev_count; i++) {
 780                        if (vpif_obj.sd[i]) {
 781                                /* the sub device is registered */
 782                                ch->curr_subdev_info = &config->subdev_info[i];
 783                                /* make first input as the current input */
 784                                vid_ch->input_idx = 0;
 785                                break;
 786                        }
 787                }
 788                if (i == config->subdev_count) {
 789                        vpif_err("No sub device registered\n");
 790                        ret = -ENOENT;
 791                        goto exit;
 792                }
 793        }
 794
 795        /* Allocate memory for the file handle object */
 796        fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 797        if (NULL == fh) {
 798                vpif_err("unable to allocate memory for file handle object\n");
 799                ret = -ENOMEM;
 800                goto exit;
 801        }
 802
 803        /* store pointer to fh in private_data member of filep */
 804        filep->private_data = fh;
 805        fh->channel = ch;
 806        fh->initialized = 0;
 807        /* If decoder is not initialized. initialize it */
 808        if (!ch->initialized) {
 809                fh->initialized = 1;
 810                ch->initialized = 1;
 811                memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
 812        }
 813        /* Increment channel usrs counter */
 814        ch->usrs++;
 815        /* Set io_allowed member to false */
 816        fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 817        /* Initialize priority of this instance to default priority */
 818        fh->prio = V4L2_PRIORITY_UNSET;
 819        v4l2_prio_open(&ch->prio, &fh->prio);
 820exit:
 821        mutex_unlock(&common->lock);
 822        return ret;
 823}
 824
 825/**
 826 * vpif_release : function to clean up file close
 827 * @filep: file pointer
 828 *
 829 * This function deletes buffer queue, frees the buffers and the vpfe file
 830 * handle
 831 */
 832static int vpif_release(struct file *filep)
 833{
 834        struct vpif_fh *fh = filep->private_data;
 835        struct channel_obj *ch = fh->channel;
 836        struct common_obj *common;
 837
 838        vpif_dbg(2, debug, "vpif_release\n");
 839
 840        common = &ch->common[VPIF_VIDEO_INDEX];
 841
 842        if (mutex_lock_interruptible(&common->lock))
 843                return -ERESTARTSYS;
 844
 845        /* if this instance is doing IO */
 846        if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 847                /* Reset io_usrs member of channel object */
 848                common->io_usrs = 0;
 849                /* Disable channel as per its device type and channel id */
 850                if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 851                        enable_channel0(0);
 852                        channel0_intr_enable(0);
 853                }
 854                if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
 855                    (2 == common->started)) {
 856                        enable_channel1(0);
 857                        channel1_intr_enable(0);
 858                }
 859                common->started = 0;
 860                /* Free buffers allocated */
 861                videobuf_queue_cancel(&common->buffer_queue);
 862                videobuf_mmap_free(&common->buffer_queue);
 863        }
 864
 865        /* Decrement channel usrs counter */
 866        ch->usrs--;
 867
 868        /* unlock mutex on channel object */
 869        mutex_unlock(&common->lock);
 870
 871        /* Close the priority */
 872        v4l2_prio_close(&ch->prio, fh->prio);
 873
 874        if (fh->initialized)
 875                ch->initialized = 0;
 876
 877        filep->private_data = NULL;
 878        kfree(fh);
 879        return 0;
 880}
 881
 882/**
 883 * vpif_reqbufs() - request buffer handler
 884 * @file: file ptr
 885 * @priv: file handle
 886 * @reqbuf: request buffer structure ptr
 887 */
 888static int vpif_reqbufs(struct file *file, void *priv,
 889                        struct v4l2_requestbuffers *reqbuf)
 890{
 891        struct vpif_fh *fh = priv;
 892        struct channel_obj *ch = fh->channel;
 893        struct common_obj *common;
 894        u8 index = 0;
 895        int ret = 0;
 896
 897        vpif_dbg(2, debug, "vpif_reqbufs\n");
 898
 899        /**
 900         * This file handle has not initialized the channel,
 901         * It is not allowed to do settings
 902         */
 903        if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
 904            || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
 905                if (!fh->initialized) {
 906                        vpif_dbg(1, debug, "Channel Busy\n");
 907                        return -EBUSY;
 908                }
 909        }
 910
 911        if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type)
 912                return -EINVAL;
 913
 914        index = VPIF_VIDEO_INDEX;
 915
 916        common = &ch->common[index];
 917
 918        if (mutex_lock_interruptible(&common->lock))
 919                return -ERESTARTSYS;
 920
 921        if (0 != common->io_usrs) {
 922                ret = -EBUSY;
 923                goto reqbuf_exit;
 924        }
 925
 926        /* Initialize videobuf queue as per the buffer type */
 927        videobuf_queue_dma_contig_init(&common->buffer_queue,
 928                                            &video_qops, NULL,
 929                                            &common->irqlock,
 930                                            reqbuf->type,
 931                                            common->fmt.fmt.pix.field,
 932                                            sizeof(struct videobuf_buffer), fh);
 933
 934        /* Set io allowed member of file handle to TRUE */
 935        fh->io_allowed[index] = 1;
 936        /* Increment io usrs member of channel object to 1 */
 937        common->io_usrs = 1;
 938        /* Store type of memory requested in channel object */
 939        common->memory = reqbuf->memory;
 940        INIT_LIST_HEAD(&common->dma_queue);
 941
 942        /* Allocate buffers */
 943        ret = videobuf_reqbufs(&common->buffer_queue, reqbuf);
 944
 945reqbuf_exit:
 946        mutex_unlock(&common->lock);
 947        return ret;
 948}
 949
 950/**
 951 * vpif_querybuf() - query buffer handler
 952 * @file: file ptr
 953 * @priv: file handle
 954 * @buf: v4l2 buffer structure ptr
 955 */
 956static int vpif_querybuf(struct file *file, void *priv,
 957                                struct v4l2_buffer *buf)
 958{
 959        struct vpif_fh *fh = priv;
 960        struct channel_obj *ch = fh->channel;
 961        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 962
 963        vpif_dbg(2, debug, "vpif_querybuf\n");
 964
 965        if (common->fmt.type != buf->type)
 966                return -EINVAL;
 967
 968        if (common->memory != V4L2_MEMORY_MMAP) {
 969                vpif_dbg(1, debug, "Invalid memory\n");
 970                return -EINVAL;
 971        }
 972
 973        return videobuf_querybuf(&common->buffer_queue, buf);
 974}
 975
 976/**
 977 * vpif_qbuf() - query buffer handler
 978 * @file: file ptr
 979 * @priv: file handle
 980 * @buf: v4l2 buffer structure ptr
 981 */
 982static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 983{
 984
 985        struct vpif_fh *fh = priv;
 986        struct channel_obj *ch = fh->channel;
 987        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 988        struct v4l2_buffer tbuf = *buf;
 989        struct videobuf_buffer *buf1;
 990        unsigned long addr = 0;
 991        unsigned long flags;
 992        int ret = 0;
 993
 994        vpif_dbg(2, debug, "vpif_qbuf\n");
 995
 996        if (common->fmt.type != tbuf.type) {
 997                vpif_err("invalid buffer type\n");
 998                return -EINVAL;
 999        }
1000
1001        if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1002                vpif_err("fh io not allowed \n");
1003                return -EACCES;
1004        }
1005
1006        if (!(list_empty(&common->dma_queue)) ||
1007            (common->cur_frm != common->next_frm) ||
1008            !common->started ||
1009            (common->started && (0 == ch->field_id)))
1010                return videobuf_qbuf(&common->buffer_queue, buf);
1011
1012        /* bufferqueue is empty store buffer address in VPIF registers */
1013        mutex_lock(&common->buffer_queue.vb_lock);
1014        buf1 = common->buffer_queue.bufs[tbuf.index];
1015
1016        if ((buf1->state == VIDEOBUF_QUEUED) ||
1017            (buf1->state == VIDEOBUF_ACTIVE)) {
1018                vpif_err("invalid state\n");
1019                goto qbuf_exit;
1020        }
1021
1022        switch (buf1->memory) {
1023        case V4L2_MEMORY_MMAP:
1024                if (buf1->baddr == 0)
1025                        goto qbuf_exit;
1026                break;
1027
1028        case V4L2_MEMORY_USERPTR:
1029                if (tbuf.length < buf1->bsize)
1030                        goto qbuf_exit;
1031
1032                if ((VIDEOBUF_NEEDS_INIT != buf1->state)
1033                            && (buf1->baddr != tbuf.m.userptr))
1034                        vpif_buffer_release(&common->buffer_queue, buf1);
1035                        buf1->baddr = tbuf.m.userptr;
1036                break;
1037
1038        default:
1039                goto qbuf_exit;
1040        }
1041
1042        local_irq_save(flags);
1043        ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
1044                                        common->buffer_queue.field);
1045        if (ret < 0) {
1046                local_irq_restore(flags);
1047                goto qbuf_exit;
1048        }
1049
1050        buf1->state = VIDEOBUF_ACTIVE;
1051
1052        if (V4L2_MEMORY_USERPTR == common->memory)
1053                addr = buf1->boff;
1054        else
1055                addr = videobuf_to_dma_contig(buf1);
1056
1057        common->next_frm = buf1;
1058        common->set_addr(addr + common->ytop_off,
1059                         addr + common->ybtm_off,
1060                         addr + common->ctop_off,
1061                         addr + common->cbtm_off);
1062
1063        local_irq_restore(flags);
1064        list_add_tail(&buf1->stream, &common->buffer_queue.stream);
1065        mutex_unlock(&common->buffer_queue.vb_lock);
1066        return 0;
1067
1068qbuf_exit:
1069        mutex_unlock(&common->buffer_queue.vb_lock);
1070        return -EINVAL;
1071}
1072
1073/**
1074 * vpif_dqbuf() - query buffer handler
1075 * @file: file ptr
1076 * @priv: file handle
1077 * @buf: v4l2 buffer structure ptr
1078 */
1079static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1080{
1081        struct vpif_fh *fh = priv;
1082        struct channel_obj *ch = fh->channel;
1083        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1084
1085        vpif_dbg(2, debug, "vpif_dqbuf\n");
1086
1087        return videobuf_dqbuf(&common->buffer_queue, buf,
1088                                        file->f_flags & O_NONBLOCK);
1089}
1090
1091/**
1092 * vpif_streamon() - streamon handler
1093 * @file: file ptr
1094 * @priv: file handle
1095 * @buftype: v4l2 buffer type
1096 */
1097static int vpif_streamon(struct file *file, void *priv,
1098                                enum v4l2_buf_type buftype)
1099{
1100
1101        struct vpif_capture_config *config = vpif_dev->platform_data;
1102        struct vpif_fh *fh = priv;
1103        struct channel_obj *ch = fh->channel;
1104        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1105        struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1106        struct vpif_params *vpif;
1107        unsigned long addr = 0;
1108        int ret = 0;
1109
1110        vpif_dbg(2, debug, "vpif_streamon\n");
1111
1112        vpif = &ch->vpifparams;
1113
1114        if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1115                vpif_dbg(1, debug, "buffer type not supported\n");
1116                return -EINVAL;
1117        }
1118
1119        /* If file handle is not allowed IO, return error */
1120        if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1121                vpif_dbg(1, debug, "io not allowed\n");
1122                return -EACCES;
1123        }
1124
1125        /* If Streaming is already started, return error */
1126        if (common->started) {
1127                vpif_dbg(1, debug, "channel->started\n");
1128                return -EBUSY;
1129        }
1130
1131        if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
1132            oth_ch->common[VPIF_VIDEO_INDEX].started &&
1133            vpif->std_info.ycmux_mode == 0) ||
1134           ((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
1135            (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1136                vpif_dbg(1, debug, "other channel is being used\n");
1137                return -EBUSY;
1138        }
1139
1140        ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
1141        if (ret)
1142                return ret;
1143
1144        /* Enable streamon on the sub device */
1145        ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1146                                s_stream, 1);
1147
1148        if (ret && (ret != -ENOIOCTLCMD)) {
1149                vpif_dbg(1, debug, "stream on failed in subdev\n");
1150                return ret;
1151        }
1152
1153        /* Call videobuf_streamon to start streaming in videobuf */
1154        ret = videobuf_streamon(&common->buffer_queue);
1155        if (ret) {
1156                vpif_dbg(1, debug, "videobuf_streamon\n");
1157                return ret;
1158        }
1159
1160        if (mutex_lock_interruptible(&common->lock)) {
1161                ret = -ERESTARTSYS;
1162                goto streamoff_exit;
1163        }
1164
1165        /* If buffer queue is empty, return error */
1166        if (list_empty(&common->dma_queue)) {
1167                vpif_dbg(1, debug, "buffer queue is empty\n");
1168                ret = -EIO;
1169                goto exit;
1170        }
1171
1172        /* Get the next frame from the buffer queue */
1173        common->cur_frm = list_entry(common->dma_queue.next,
1174                                    struct videobuf_buffer, queue);
1175        common->next_frm = common->cur_frm;
1176
1177        /* Remove buffer from the buffer queue */
1178        list_del(&common->cur_frm->queue);
1179        /* Mark state of the current frame to active */
1180        common->cur_frm->state = VIDEOBUF_ACTIVE;
1181        /* Initialize field_id and started member */
1182        ch->field_id = 0;
1183        common->started = 1;
1184
1185        if (V4L2_MEMORY_USERPTR == common->memory)
1186                addr = common->cur_frm->boff;
1187        else
1188                addr = videobuf_to_dma_contig(common->cur_frm);
1189
1190        /* Calculate the offset for Y and C data in the buffer */
1191        vpif_calculate_offsets(ch);
1192
1193        if ((vpif->std_info.frm_fmt &&
1194            ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
1195             (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
1196            (!vpif->std_info.frm_fmt &&
1197             (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
1198                vpif_dbg(1, debug, "conflict in field format and std format\n");
1199                ret = -EINVAL;
1200                goto exit;
1201        }
1202
1203        /* configure 1 or 2 channel mode */
1204        ret = config->setup_input_channel_mode(vpif->std_info.ycmux_mode);
1205
1206        if (ret < 0) {
1207                vpif_dbg(1, debug, "can't set vpif channel mode\n");
1208                goto exit;
1209        }
1210
1211        /* Call vpif_set_params function to set the parameters and addresses */
1212        ret = vpif_set_video_params(vpif, ch->channel_id);
1213
1214        if (ret < 0) {
1215                vpif_dbg(1, debug, "can't set video params\n");
1216                goto exit;
1217        }
1218
1219        common->started = ret;
1220        vpif_config_addr(ch, ret);
1221
1222        common->set_addr(addr + common->ytop_off,
1223                         addr + common->ybtm_off,
1224                         addr + common->ctop_off,
1225                         addr + common->cbtm_off);
1226
1227        /**
1228         * Set interrupt for both the fields in VPIF Register enable channel in
1229         * VPIF register
1230         */
1231        if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
1232                channel0_intr_assert();
1233                channel0_intr_enable(1);
1234                enable_channel0(1);
1235        }
1236        if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
1237            (common->started == 2)) {
1238                channel1_intr_assert();
1239                channel1_intr_enable(1);
1240                enable_channel1(1);
1241        }
1242        channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
1243        mutex_unlock(&common->lock);
1244        return ret;
1245
1246exit:
1247        mutex_unlock(&common->lock);
1248streamoff_exit:
1249        ret = videobuf_streamoff(&common->buffer_queue);
1250        return ret;
1251}
1252
1253/**
1254 * vpif_streamoff() - streamoff handler
1255 * @file: file ptr
1256 * @priv: file handle
1257 * @buftype: v4l2 buffer type
1258 */
1259static int vpif_streamoff(struct file *file, void *priv,
1260                                enum v4l2_buf_type buftype)
1261{
1262
1263        struct vpif_fh *fh = priv;
1264        struct channel_obj *ch = fh->channel;
1265        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1266        int ret;
1267
1268        vpif_dbg(2, debug, "vpif_streamoff\n");
1269
1270        if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1271                vpif_dbg(1, debug, "buffer type not supported\n");
1272                return -EINVAL;
1273        }
1274
1275        /* If io is allowed for this file handle, return error */
1276        if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1277                vpif_dbg(1, debug, "io not allowed\n");
1278                return -EACCES;
1279        }
1280
1281        /* If streaming is not started, return error */
1282        if (!common->started) {
1283                vpif_dbg(1, debug, "channel->started\n");
1284                return -EINVAL;
1285        }
1286
1287        if (mutex_lock_interruptible(&common->lock))
1288                return -ERESTARTSYS;
1289
1290        /* disable channel */
1291        if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
1292                enable_channel0(0);
1293                channel0_intr_enable(0);
1294        } else {
1295                enable_channel1(0);
1296                channel1_intr_enable(0);
1297        }
1298
1299        common->started = 0;
1300
1301        ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1302                                s_stream, 0);
1303
1304        if (ret && (ret != -ENOIOCTLCMD))
1305                vpif_dbg(1, debug, "stream off failed in subdev\n");
1306
1307        mutex_unlock(&common->lock);
1308
1309        return videobuf_streamoff(&common->buffer_queue);
1310}
1311
1312/**
1313 * vpif_map_sub_device_to_input() - Maps sub device to input
1314 * @ch - ptr to channel
1315 * @config - ptr to capture configuration
1316 * @input_index - Given input index from application
1317 * @sub_device_index - index into sd table
1318 *
1319 * lookup the sub device information for a given input index.
1320 * we report all the inputs to application. inputs table also
1321 * has sub device name for the each input
1322 */
1323static struct vpif_subdev_info *vpif_map_sub_device_to_input(
1324                                struct channel_obj *ch,
1325                                struct vpif_capture_config *vpif_cfg,
1326                                int input_index,
1327                                int *sub_device_index)
1328{
1329        struct vpif_capture_chan_config *chan_cfg;
1330        struct vpif_subdev_info *subdev_info = NULL;
1331        const char *subdev_name = NULL;
1332        int i;
1333
1334        vpif_dbg(2, debug, "vpif_map_sub_device_to_input\n");
1335
1336        chan_cfg = &vpif_cfg->chan_config[ch->channel_id];
1337
1338        /**
1339         * search through the inputs to find the sub device supporting
1340         * the input
1341         */
1342        for (i = 0; i < chan_cfg->input_count; i++) {
1343                /* For each sub device, loop through input */
1344                if (i == input_index) {
1345                        subdev_name = chan_cfg->inputs[i].subdev_name;
1346                        break;
1347                }
1348        }
1349
1350        /* if reached maximum. return null */
1351        if (i == chan_cfg->input_count || (NULL == subdev_name))
1352                return subdev_info;
1353
1354        /* loop through the sub device list to get the sub device info */
1355        for (i = 0; i < vpif_cfg->subdev_count; i++) {
1356                subdev_info = &vpif_cfg->subdev_info[i];
1357                if (!strcmp(subdev_info->name, subdev_name))
1358                        break;
1359        }
1360
1361        if (i == vpif_cfg->subdev_count)
1362                return subdev_info;
1363
1364        /* check if the sub device is registered */
1365        if (NULL == vpif_obj.sd[i])
1366                return NULL;
1367
1368        *sub_device_index = i;
1369        return subdev_info;
1370}
1371
1372/**
1373 * vpif_querystd() - querystd handler
1374 * @file: file ptr
1375 * @priv: file handle
1376 * @std_id: ptr to std id
1377 *
1378 * This function is called to detect standard at the selected input
1379 */
1380static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1381{
1382        struct vpif_fh *fh = priv;
1383        struct channel_obj *ch = fh->channel;
1384        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1385        int ret = 0;
1386
1387        vpif_dbg(2, debug, "vpif_querystd\n");
1388
1389        if (mutex_lock_interruptible(&common->lock))
1390                return -ERESTARTSYS;
1391
1392        /* Call querystd function of decoder device */
1393        ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1394                                querystd, std_id);
1395        if (ret < 0)
1396                vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1397
1398        mutex_unlock(&common->lock);
1399        return ret;
1400}
1401
1402/**
1403 * vpif_g_std() - get STD handler
1404 * @file: file ptr
1405 * @priv: file handle
1406 * @std_id: ptr to std id
1407 */
1408static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1409{
1410        struct vpif_fh *fh = priv;
1411        struct channel_obj *ch = fh->channel;
1412
1413        vpif_dbg(2, debug, "vpif_g_std\n");
1414
1415        *std = ch->video.stdid;
1416        return 0;
1417}
1418
1419/**
1420 * vpif_s_std() - set STD handler
1421 * @file: file ptr
1422 * @priv: file handle
1423 * @std_id: ptr to std id
1424 */
1425static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1426{
1427        struct vpif_fh *fh = priv;
1428        struct channel_obj *ch = fh->channel;
1429        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1430        int ret = 0;
1431
1432        vpif_dbg(2, debug, "vpif_s_std\n");
1433
1434        if (common->started) {
1435                vpif_err("streaming in progress\n");
1436                return -EBUSY;
1437        }
1438
1439        if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1440            (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1441                if (!fh->initialized) {
1442                        vpif_dbg(1, debug, "Channel Busy\n");
1443                        return -EBUSY;
1444                }
1445        }
1446
1447        ret = v4l2_prio_check(&ch->prio, fh->prio);
1448        if (0 != ret)
1449                return ret;
1450
1451        fh->initialized = 1;
1452
1453        /* Call encoder subdevice function to set the standard */
1454        if (mutex_lock_interruptible(&common->lock))
1455                return -ERESTARTSYS;
1456
1457        ch->video.stdid = *std_id;
1458
1459        /* Get the information about the standard */
1460        if (vpif_update_std_info(ch)) {
1461                ret = -EINVAL;
1462                vpif_err("Error getting the standard info\n");
1463                goto s_std_exit;
1464        }
1465
1466        /* Configure the default format information */
1467        vpif_config_format(ch);
1468
1469        /* set standard in the sub device */
1470        ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core,
1471                                s_std, *std_id);
1472        if (ret < 0)
1473                vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1474
1475s_std_exit:
1476        mutex_unlock(&common->lock);
1477        return ret;
1478}
1479
1480/**
1481 * vpif_enum_input() - ENUMINPUT handler
1482 * @file: file ptr
1483 * @priv: file handle
1484 * @input: ptr to input structure
1485 */
1486static int vpif_enum_input(struct file *file, void *priv,
1487                                struct v4l2_input *input)
1488{
1489
1490        struct vpif_capture_config *config = vpif_dev->platform_data;
1491        struct vpif_capture_chan_config *chan_cfg;
1492        struct vpif_fh *fh = priv;
1493        struct channel_obj *ch = fh->channel;
1494
1495        chan_cfg = &config->chan_config[ch->channel_id];
1496
1497        if (input->index >= chan_cfg->input_count) {
1498                vpif_dbg(1, debug, "Invalid input index\n");
1499                return -EINVAL;
1500        }
1501
1502        memcpy(input, &chan_cfg->inputs[input->index].input,
1503                sizeof(*input));
1504        return 0;
1505}
1506
1507/**
1508 * vpif_g_input() - Get INPUT handler
1509 * @file: file ptr
1510 * @priv: file handle
1511 * @index: ptr to input index
1512 */
1513static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
1514{
1515        struct vpif_fh *fh = priv;
1516        struct channel_obj *ch = fh->channel;
1517        struct video_obj *vid_ch = &ch->video;
1518
1519        *index = vid_ch->input_idx;
1520
1521        return 0;
1522}
1523
1524/**
1525 * vpif_s_input() - Set INPUT handler
1526 * @file: file ptr
1527 * @priv: file handle
1528 * @index: input index
1529 */
1530static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1531{
1532        struct vpif_capture_config *config = vpif_dev->platform_data;
1533        struct vpif_capture_chan_config *chan_cfg;
1534        struct vpif_fh *fh = priv;
1535        struct channel_obj *ch = fh->channel;
1536        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1537        struct video_obj *vid_ch = &ch->video;
1538        struct vpif_subdev_info *subdev_info;
1539        int ret = 0, sd_index = 0;
1540        u32 input = 0, output = 0;
1541
1542        chan_cfg = &config->chan_config[ch->channel_id];
1543
1544        if (common->started) {
1545                vpif_err("Streaming in progress\n");
1546                return -EBUSY;
1547        }
1548
1549        if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1550            (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1551                if (!fh->initialized) {
1552                        vpif_dbg(1, debug, "Channel Busy\n");
1553                        return -EBUSY;
1554                }
1555        }
1556
1557        ret = v4l2_prio_check(&ch->prio, fh->prio);
1558        if (0 != ret)
1559                return ret;
1560
1561        fh->initialized = 1;
1562        subdev_info = vpif_map_sub_device_to_input(ch, config, index,
1563                                                   &sd_index);
1564        if (NULL == subdev_info) {
1565                vpif_dbg(1, debug,
1566                        "couldn't lookup sub device for the input index\n");
1567                return -EINVAL;
1568        }
1569
1570        if (mutex_lock_interruptible(&common->lock))
1571                return -ERESTARTSYS;
1572
1573        /* first setup input path from sub device to vpif */
1574        if (config->setup_input_path) {
1575                ret = config->setup_input_path(ch->channel_id,
1576                                               subdev_info->name);
1577                if (ret < 0) {
1578                        vpif_dbg(1, debug, "couldn't setup input path for the"
1579                                " sub device %s, for input index %d\n",
1580                                subdev_info->name, index);
1581                        goto exit;
1582                }
1583        }
1584
1585        if (subdev_info->can_route) {
1586                input = subdev_info->input;
1587                output = subdev_info->output;
1588                ret = v4l2_subdev_call(vpif_obj.sd[sd_index], video, s_routing,
1589                                        input, output, 0);
1590                if (ret < 0) {
1591                        vpif_dbg(1, debug, "Failed to set input\n");
1592                        goto exit;
1593                }
1594        }
1595        vid_ch->input_idx = index;
1596        ch->curr_subdev_info = subdev_info;
1597        ch->curr_sd_index = sd_index;
1598        /* copy interface parameters to vpif */
1599        ch->vpifparams.iface = subdev_info->vpif_if;
1600
1601        /* update tvnorms from the sub device input info */
1602        ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
1603
1604exit:
1605        mutex_unlock(&common->lock);
1606        return ret;
1607}
1608
1609/**
1610 * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1611 * @file: file ptr
1612 * @priv: file handle
1613 * @index: input index
1614 */
1615static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
1616                                        struct v4l2_fmtdesc *fmt)
1617{
1618        struct vpif_fh *fh = priv;
1619        struct channel_obj *ch = fh->channel;
1620
1621        if (fmt->index != 0) {
1622                vpif_dbg(1, debug, "Invalid format index\n");
1623                return -EINVAL;
1624        }
1625
1626        /* Fill in the information about format */
1627        if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1628                fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1629                strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1630                fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1631        } else {
1632                fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1633                strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1634                fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1635        }
1636        return 0;
1637}
1638
1639/**
1640 * vpif_try_fmt_vid_cap() - TRY_FMT handler
1641 * @file: file ptr
1642 * @priv: file handle
1643 * @fmt: ptr to v4l2 format structure
1644 */
1645static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1646                                struct v4l2_format *fmt)
1647{
1648        struct vpif_fh *fh = priv;
1649        struct channel_obj *ch = fh->channel;
1650        struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1651
1652        return vpif_check_format(ch, pixfmt, 1);
1653}
1654
1655
1656/**
1657 * vpif_g_fmt_vid_cap() - Set INPUT handler
1658 * @file: file ptr
1659 * @priv: file handle
1660 * @fmt: ptr to v4l2 format structure
1661 */
1662static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1663                                struct v4l2_format *fmt)
1664{
1665        struct vpif_fh *fh = priv;
1666        struct channel_obj *ch = fh->channel;
1667        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1668
1669        /* Check the validity of the buffer type */
1670        if (common->fmt.type != fmt->type)
1671                return -EINVAL;
1672
1673        /* Fill in the information about format */
1674        if (mutex_lock_interruptible(&common->lock))
1675                return -ERESTARTSYS;
1676
1677        *fmt = common->fmt;
1678        mutex_unlock(&common->lock);
1679        return 0;
1680}
1681
1682/**
1683 * vpif_s_fmt_vid_cap() - Set FMT handler
1684 * @file: file ptr
1685 * @priv: file handle
1686 * @fmt: ptr to v4l2 format structure
1687 */
1688static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1689                                struct v4l2_format *fmt)
1690{
1691        struct vpif_fh *fh = priv;
1692        struct channel_obj *ch = fh->channel;
1693        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1694        struct v4l2_pix_format *pixfmt;
1695        int ret = 0;
1696
1697        vpif_dbg(2, debug, "VIDIOC_S_FMT\n");
1698
1699        /* If streaming is started, return error */
1700        if (common->started) {
1701                vpif_dbg(1, debug, "Streaming is started\n");
1702                return -EBUSY;
1703        }
1704
1705        if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1706            (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1707                if (!fh->initialized) {
1708                        vpif_dbg(1, debug, "Channel Busy\n");
1709                        return -EBUSY;
1710                }
1711        }
1712
1713        ret = v4l2_prio_check(&ch->prio, fh->prio);
1714        if (0 != ret)
1715                return ret;
1716
1717        fh->initialized = 1;
1718
1719        pixfmt = &fmt->fmt.pix;
1720        /* Check for valid field format */
1721        ret = vpif_check_format(ch, pixfmt, 0);
1722
1723        if (ret)
1724                return ret;
1725        /* store the format in the channel object */
1726        if (mutex_lock_interruptible(&common->lock))
1727                return -ERESTARTSYS;
1728
1729        common->fmt = *fmt;
1730        mutex_unlock(&common->lock);
1731
1732        return 0;
1733}
1734
1735/**
1736 * vpif_querycap() - QUERYCAP handler
1737 * @file: file ptr
1738 * @priv: file handle
1739 * @cap: ptr to v4l2_capability structure
1740 */
1741static int vpif_querycap(struct file *file, void  *priv,
1742                                struct v4l2_capability *cap)
1743{
1744        struct vpif_capture_config *config = vpif_dev->platform_data;
1745
1746        cap->version = VPIF_CAPTURE_VERSION_CODE;
1747        cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1748        strlcpy(cap->driver, "vpif capture", sizeof(cap->driver));
1749        strlcpy(cap->bus_info, "DM646x Platform", sizeof(cap->bus_info));
1750        strlcpy(cap->card, config->card_name, sizeof(cap->card));
1751
1752        return 0;
1753}
1754
1755/**
1756 * vpif_g_priority() - get priority handler
1757 * @file: file ptr
1758 * @priv: file handle
1759 * @prio: ptr to v4l2_priority structure
1760 */
1761static int vpif_g_priority(struct file *file, void *priv,
1762                           enum v4l2_priority *prio)
1763{
1764        struct vpif_fh *fh = priv;
1765        struct channel_obj *ch = fh->channel;
1766
1767        *prio = v4l2_prio_max(&ch->prio);
1768
1769        return 0;
1770}
1771
1772/**
1773 * vpif_s_priority() - set priority handler
1774 * @file: file ptr
1775 * @priv: file handle
1776 * @prio: ptr to v4l2_priority structure
1777 */
1778static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1779{
1780        struct vpif_fh *fh = priv;
1781        struct channel_obj *ch = fh->channel;
1782
1783        return v4l2_prio_change(&ch->prio, &fh->prio, p);
1784}
1785
1786/**
1787 * vpif_cropcap() - cropcap handler
1788 * @file: file ptr
1789 * @priv: file handle
1790 * @crop: ptr to v4l2_cropcap structure
1791 */
1792static int vpif_cropcap(struct file *file, void *priv,
1793                        struct v4l2_cropcap *crop)
1794{
1795        struct vpif_fh *fh = priv;
1796        struct channel_obj *ch = fh->channel;
1797        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1798
1799        if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
1800                return -EINVAL;
1801
1802        crop->bounds.left = 0;
1803        crop->bounds.top = 0;
1804        crop->bounds.height = common->height;
1805        crop->bounds.width = common->width;
1806        crop->defrect = crop->bounds;
1807        return 0;
1808}
1809
1810/* vpif capture ioctl operations */
1811static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1812        .vidioc_querycap                = vpif_querycap,
1813        .vidioc_g_priority              = vpif_g_priority,
1814        .vidioc_s_priority              = vpif_s_priority,
1815        .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1816        .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1817        .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1818        .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1819        .vidioc_enum_input              = vpif_enum_input,
1820        .vidioc_s_input                 = vpif_s_input,
1821        .vidioc_g_input                 = vpif_g_input,
1822        .vidioc_reqbufs                 = vpif_reqbufs,
1823        .vidioc_querybuf                = vpif_querybuf,
1824        .vidioc_querystd                = vpif_querystd,
1825        .vidioc_s_std                   = vpif_s_std,
1826        .vidioc_g_std                   = vpif_g_std,
1827        .vidioc_qbuf                    = vpif_qbuf,
1828        .vidioc_dqbuf                   = vpif_dqbuf,
1829        .vidioc_streamon                = vpif_streamon,
1830        .vidioc_streamoff               = vpif_streamoff,
1831        .vidioc_cropcap                 = vpif_cropcap,
1832};
1833
1834/* vpif file operations */
1835static struct v4l2_file_operations vpif_fops = {
1836        .owner = THIS_MODULE,
1837        .open = vpif_open,
1838        .release = vpif_release,
1839        .ioctl = video_ioctl2,
1840        .mmap = vpif_mmap,
1841        .poll = vpif_poll
1842};
1843
1844/* vpif video template */
1845static struct video_device vpif_video_template = {
1846        .name           = "vpif",
1847        .fops           = &vpif_fops,
1848        .minor          = -1,
1849        .ioctl_ops      = &vpif_ioctl_ops,
1850};
1851
1852/**
1853 * initialize_vpif() - Initialize vpif data structures
1854 *
1855 * Allocate memory for data structures and initialize them
1856 */
1857static int initialize_vpif(void)
1858{
1859        int err = 0, i, j;
1860        int free_channel_objects_index;
1861
1862        /* Default number of buffers should be 3 */
1863        if ((ch0_numbuffers > 0) &&
1864            (ch0_numbuffers < config_params.min_numbuffers))
1865                ch0_numbuffers = config_params.min_numbuffers;
1866        if ((ch1_numbuffers > 0) &&
1867            (ch1_numbuffers < config_params.min_numbuffers))
1868                ch1_numbuffers = config_params.min_numbuffers;
1869
1870        /* Set buffer size to min buffers size if it is invalid */
1871        if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
1872                ch0_bufsize =
1873                    config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
1874        if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
1875                ch1_bufsize =
1876                    config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
1877
1878        config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
1879        config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
1880        if (ch0_numbuffers) {
1881                config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
1882                    = ch0_bufsize;
1883        }
1884        if (ch1_numbuffers) {
1885                config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
1886                    = ch1_bufsize;
1887        }
1888
1889        /* Allocate memory for six channel objects */
1890        for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1891                vpif_obj.dev[i] =
1892                    kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1893                /* If memory allocation fails, return error */
1894                if (!vpif_obj.dev[i]) {
1895                        free_channel_objects_index = i;
1896                        err = -ENOMEM;
1897                        goto vpif_init_free_channel_objects;
1898                }
1899        }
1900        return 0;
1901
1902vpif_init_free_channel_objects:
1903        for (j = 0; j < free_channel_objects_index; j++)
1904                kfree(vpif_obj.dev[j]);
1905        return err;
1906}
1907
1908/**
1909 * vpif_probe : This function probes the vpif capture driver
1910 * @pdev: platform device pointer
1911 *
1912 * This creates device entries by register itself to the V4L2 driver and
1913 * initializes fields of each channel objects
1914 */
1915static __init int vpif_probe(struct platform_device *pdev)
1916{
1917        struct vpif_subdev_info *subdevdata;
1918        struct vpif_capture_config *config;
1919        int i, j, k, m, q, err;
1920        struct i2c_adapter *i2c_adap;
1921        struct channel_obj *ch;
1922        struct common_obj *common;
1923        struct video_device *vfd;
1924        struct resource *res;
1925        int subdev_count;
1926
1927        vpif_dev = &pdev->dev;
1928
1929        err = initialize_vpif();
1930        if (err) {
1931                v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1932                return err;
1933        }
1934
1935        k = 0;
1936        while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1937                for (i = res->start; i <= res->end; i++) {
1938                        if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
1939                                        "DM646x_Capture",
1940                                (void *)(&vpif_obj.dev[k]->channel_id))) {
1941                                err = -EBUSY;
1942                                i--;
1943                                goto vpif_int_err;
1944                        }
1945                }
1946                k++;
1947        }
1948
1949        for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1950                /* Get the pointer to the channel object */
1951                ch = vpif_obj.dev[i];
1952                /* Allocate memory for video device */
1953                vfd = video_device_alloc();
1954                if (NULL == vfd) {
1955                        for (j = 0; j < i; j++) {
1956                                ch = vpif_obj.dev[j];
1957                                video_device_release(ch->video_dev);
1958                        }
1959                        err = -ENOMEM;
1960                        goto vpif_dev_alloc_err;
1961                }
1962
1963                /* Initialize field of video device */
1964                *vfd = vpif_video_template;
1965                vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1966                vfd->release = video_device_release;
1967                snprintf(vfd->name, sizeof(vfd->name),
1968                         "DM646x_VPIFCapture_DRIVER_V%d.%d.%d",
1969                         (VPIF_CAPTURE_VERSION_CODE >> 16) & 0xff,
1970                         (VPIF_CAPTURE_VERSION_CODE >> 8) & 0xff,
1971                         (VPIF_CAPTURE_VERSION_CODE) & 0xff);
1972                /* Set video_dev to the video device */
1973                ch->video_dev = vfd;
1974        }
1975
1976        for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1977                ch = vpif_obj.dev[j];
1978                ch->channel_id = j;
1979                common = &(ch->common[VPIF_VIDEO_INDEX]);
1980                spin_lock_init(&common->irqlock);
1981                mutex_init(&common->lock);
1982                /* Initialize prio member of channel object */
1983                v4l2_prio_init(&ch->prio);
1984                err = video_register_device(ch->video_dev,
1985                                            VFL_TYPE_GRABBER, (j ? 1 : 0));
1986                if (err)
1987                        goto probe_out;
1988
1989                video_set_drvdata(ch->video_dev, ch);
1990
1991        }
1992
1993        i2c_adap = i2c_get_adapter(1);
1994        config = pdev->dev.platform_data;
1995
1996        subdev_count = config->subdev_count;
1997        vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1998                                GFP_KERNEL);
1999        if (vpif_obj.sd == NULL) {
2000                vpif_err("unable to allocate memory for subdevice pointers\n");
2001                err = -ENOMEM;
2002                goto probe_out;
2003        }
2004
2005        err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
2006        if (err) {
2007                v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
2008                goto probe_subdev_out;
2009        }
2010
2011        for (i = 0; i < subdev_count; i++) {
2012                subdevdata = &config->subdev_info[i];
2013                vpif_obj.sd[i] =
2014                        v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
2015                                                  i2c_adap,
2016                                                  subdevdata->name,
2017                                                  &subdevdata->board_info,
2018                                                  NULL);
2019
2020                if (!vpif_obj.sd[i]) {
2021                        vpif_err("Error registering v4l2 subdevice\n");
2022                        goto probe_subdev_out;
2023                }
2024                v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n",
2025                          subdevdata->name);
2026
2027                if (vpif_obj.sd[i])
2028                        vpif_obj.sd[i]->grp_id = 1 << i;
2029        }
2030        v4l2_info(&vpif_obj.v4l2_dev, "DM646x VPIF Capture driver"
2031                  " initialized\n");
2032
2033        return 0;
2034
2035probe_subdev_out:
2036        /* free sub devices memory */
2037        kfree(vpif_obj.sd);
2038
2039        j = VPIF_CAPTURE_MAX_DEVICES;
2040probe_out:
2041        v4l2_device_unregister(&vpif_obj.v4l2_dev);
2042        for (k = 0; k < j; k++) {
2043                /* Get the pointer to the channel object */
2044                ch = vpif_obj.dev[k];
2045                /* Unregister video device */
2046                video_unregister_device(ch->video_dev);
2047        }
2048
2049vpif_dev_alloc_err:
2050        k = VPIF_CAPTURE_MAX_DEVICES-1;
2051        res = platform_get_resource(pdev, IORESOURCE_IRQ, k);
2052        i = res->end;
2053
2054vpif_int_err:
2055        for (q = k; q >= 0; q--) {
2056                for (m = i; m >= (int)res->start; m--)
2057                        free_irq(m, (void *)(&vpif_obj.dev[q]->channel_id));
2058
2059                res = platform_get_resource(pdev, IORESOURCE_IRQ, q-1);
2060                if (res)
2061                        i = res->end;
2062        }
2063        return err;
2064}
2065
2066/**
2067 * vpif_remove() - driver remove handler
2068 * @device: ptr to platform device structure
2069 *
2070 * The vidoe device is unregistered
2071 */
2072static int vpif_remove(struct platform_device *device)
2073{
2074        int i;
2075        struct channel_obj *ch;
2076
2077        v4l2_device_unregister(&vpif_obj.v4l2_dev);
2078
2079        /* un-register device */
2080        for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2081                /* Get the pointer to the channel object */
2082                ch = vpif_obj.dev[i];
2083                /* Unregister video device */
2084                video_unregister_device(ch->video_dev);
2085        }
2086        return 0;
2087}
2088
2089/**
2090 * vpif_suspend: vpif device suspend
2091 *
2092 * TODO: Add suspend code here
2093 */
2094static int
2095vpif_suspend(struct device *dev)
2096{
2097        return -1;
2098}
2099
2100/**
2101 * vpif_resume: vpif device suspend
2102 *
2103 * TODO: Add resume code here
2104 */
2105static int
2106vpif_resume(struct device *dev)
2107{
2108        return -1;
2109}
2110
2111static const struct dev_pm_ops vpif_dev_pm_ops = {
2112        .suspend = vpif_suspend,
2113        .resume = vpif_resume,
2114};
2115
2116static struct platform_driver vpif_driver = {
2117        .driver = {
2118                .name   = "vpif_capture",
2119                .owner  = THIS_MODULE,
2120                .pm = &vpif_dev_pm_ops,
2121        },
2122        .probe = vpif_probe,
2123        .remove = vpif_remove,
2124};
2125
2126/**
2127 * vpif_init: initialize the vpif driver
2128 *
2129 * This function registers device and driver to the kernel, requests irq
2130 * handler and allocates memory
2131 * for channel objects
2132 */
2133static __init int vpif_init(void)
2134{
2135        return platform_driver_register(&vpif_driver);
2136}
2137
2138/**
2139 * vpif_cleanup : This function clean up the vpif capture resources
2140 *
2141 * This will un-registers device and driver to the kernel, frees
2142 * requested irq handler and de-allocates memory allocated for channel
2143 * objects.
2144 */
2145static void vpif_cleanup(void)
2146{
2147        struct platform_device *pdev;
2148        struct resource *res;
2149        int irq_num;
2150        int i = 0;
2151
2152        pdev = container_of(vpif_dev, struct platform_device, dev);
2153        while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2154                for (irq_num = res->start; irq_num <= res->end; irq_num++)
2155                        free_irq(irq_num,
2156                                 (void *)(&vpif_obj.dev[i]->channel_id));
2157                i++;
2158        }
2159
2160        platform_driver_unregister(&vpif_driver);
2161
2162        kfree(vpif_obj.sd);
2163        for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++)
2164                kfree(vpif_obj.dev[i]);
2165}
2166
2167/* Function for module initialization and cleanup */
2168module_init(vpif_init);
2169module_exit(vpif_cleanup);
2170