drivers/media/platform/davinci/vpif_capture.c

   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
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/slab.h>
  26
  27 #include <media/v4l2-ioctl.h>
  28
  29 #include "vpif.h"
  30 #include "vpif_capture.h"
  31
  32 MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
  33 MODULE_LICENSE("GPL");
  34 MODULE_VERSION(VPIF_CAPTURE_VERSION);
  35
  36 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  37 #define vpif_dbg(level, debug, fmt, arg...)     \
  38                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  39
  40 static int debug = 1;
  41 static u32 ch0_numbuffers = 3;
  42 static u32 ch1_numbuffers = 3;
  43 static u32 ch0_bufsize = 1920 * 1080 * 2;
  44 static u32 ch1_bufsize = 720 * 576 * 2;
  45
  46 module_param(debug, int, 0644);
  47 module_param(ch0_numbuffers, uint, S_IRUGO);
  48 module_param(ch1_numbuffers, uint, S_IRUGO);
  49 module_param(ch0_bufsize, uint, S_IRUGO);
  50 module_param(ch1_bufsize, uint, S_IRUGO);
  51
  52 MODULE_PARM_DESC(debug, "Debug level 0-1");
  53 MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
  54 MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
  55 MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
  56 MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
  57
  58 static struct vpif_config_params config_params = {
  59         .min_numbuffers = 3,
  60         .numbuffers[0] = 3,
  61         .numbuffers[1] = 3,
  62         .min_bufsize[0] = 720 * 480 * 2,
  63         .min_bufsize[1] = 720 * 480 * 2,
  64         .channel_bufsize[0] = 1920 * 1080 * 2,
  65         .channel_bufsize[1] = 720 * 576 * 2,
  66 };
  67
  68 /* global variables */
  69 static struct vpif_device vpif_obj = { {NULL} };
  70 static struct device *vpif_dev;
  71 static void vpif_calculate_offsets(struct channel_obj *ch);
  72 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  73
  74 /**
  75  * buffer_prepare :  callback function for buffer prepare
  76  * @vb: ptr to vb2_buffer
  77  *
  78  * This is the callback function for buffer prepare when vb2_qbuf()
  79  * function is called. The buffer is prepared and user space virtual address
  80  * or user address is converted into  physical address
  81  */
  82 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  83 {
  84         /* Get the file handle object and channel object */
  85         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
  86         struct vb2_queue *q = vb->vb2_queue;
  87         struct channel_obj *ch = fh->channel;
  88         struct common_obj *common;
  89         unsigned long addr;
  90
  91         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
  92
  93         common = &ch->common[VPIF_VIDEO_INDEX];
  94
  95         if (vb->state != VB2_BUF_STATE_ACTIVE &&
  96                 vb->state != VB2_BUF_STATE_PREPARED) {
  97                 vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  98                 if (vb2_plane_vaddr(vb, 0) &&
  99                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 100                         goto exit;
 101                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 102
 103                 if (q->streaming) {
 104                         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 105                                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 106                                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
 107                                 !IS_ALIGNED((addr + common->cbtm_off), 8))
 108                                 goto exit;
 109                 }
 110         }
 111         return 0;
 112 exit:
 113         vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
 114         return -EINVAL;
 115 }
 116
 117 /**
 118  * vpif_buffer_queue_setup : Callback function for buffer setup.
 119  * @vq: vb2_queue ptr
 120  * @fmt: v4l2 format
 121  * @nbuffers: ptr to number of buffers requested by application
 122  * @nplanes:: contains number of distinct video planes needed to hold a frame
 123  * @sizes[]: contains the size (in bytes) of each plane.
 124  * @alloc_ctxs: ptr to allocation context
 125  *
 126  * This callback function is called when reqbuf() is called to adjust
 127  * the buffer count and buffer size
 128  */
 129 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 130                                 const struct v4l2_format *fmt,
 131                                 unsigned int *nbuffers, unsigned int *nplanes,
 132                                 unsigned int sizes[], void *alloc_ctxs[])
 133 {
 134         /* Get the file handle object and channel object */
 135         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 136         struct channel_obj *ch = fh->channel;
 137         struct common_obj *common;
 138         unsigned long size;
 139
 140         common = &ch->common[VPIF_VIDEO_INDEX];
 141
 142         vpif_dbg(2, debug, "vpif_buffer_setup\n");
 143
 144         /* If memory type is not mmap, return */
 145         if (V4L2_MEMORY_MMAP == common->memory) {
 146                 /* Calculate the size of the buffer */
 147                 size = config_params.channel_bufsize[ch->channel_id];
 148                 /*
 149                  * Checking if the buffer size exceeds the available buffer
 150                  * ycmux_mode = 0 means 1 channel mode HD and
 151                  * ycmux_mode = 1 means 2 channels mode SD
 152                  */
 153                 if (ch->vpifparams.std_info.ycmux_mode == 0) {
 154                         if (config_params.video_limit[ch->channel_id])
 155                                 while (size * *nbuffers >
 156                                         (config_params.video_limit[0]
 157                                                 + config_params.video_limit[1]))
 158                                         (*nbuffers)--;
 159                 } else {
 160                         if (config_params.video_limit[ch->channel_id])
 161                                 while (size * *nbuffers >
 162                                 config_params.video_limit[ch->channel_id])
 163                                         (*nbuffers)--;
 164                 }
 165
 166         } else {
 167                 size = common->fmt.fmt.pix.sizeimage;
 168         }
 169
 170         if (*nbuffers < config_params.min_numbuffers)
 171                 *nbuffers = config_params.min_numbuffers;
 172
 173         *nplanes = 1;
 174         sizes[0] = size;
 175         alloc_ctxs[0] = common->alloc_ctx;
 176
 177         return 0;
 178 }
 179
 180 /**
 181  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 182  * @vb: ptr to vb2_buffer
 183  */
 184 static void vpif_buffer_queue(struct vb2_buffer *vb)
 185 {
 186         /* Get the file handle object and channel object */
 187         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 188         struct channel_obj *ch = fh->channel;
 189         struct vpif_cap_buffer *buf = container_of(vb,
 190                                 struct vpif_cap_buffer, vb);
 191         struct common_obj *common;
 192         unsigned long flags;
 193
 194         common = &ch->common[VPIF_VIDEO_INDEX];
 195
 196         vpif_dbg(2, debug, "vpif_buffer_queue\n");
 197
 198         spin_lock_irqsave(&common->irqlock, flags);
 199         /* add the buffer to the DMA queue */
 200         list_add_tail(&buf->list, &common->dma_queue);
 201         spin_unlock_irqrestore(&common->irqlock, flags);
 202 }
 203
 204 /**
 205  * vpif_buf_cleanup : Callback function to free buffer
 206  * @vb: ptr to vb2_buffer
 207  *
 208  * This function is called from the videobuf2 layer to free memory
 209  * allocated to  the buffers
 210  */
 211 static void vpif_buf_cleanup(struct vb2_buffer *vb)
 212 {
 213         /* Get the file handle object and channel object */
 214         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 215         struct vpif_cap_buffer *buf = container_of(vb,
 216                                         struct vpif_cap_buffer, vb);
 217         struct channel_obj *ch = fh->channel;
 218         struct common_obj *common;
 219         unsigned long flags;
 220
 221         common = &ch->common[VPIF_VIDEO_INDEX];
 222
 223         spin_lock_irqsave(&common->irqlock, flags);
 224         if (vb->state == VB2_BUF_STATE_ACTIVE)
 225                 list_del_init(&buf->list);
 226         spin_unlock_irqrestore(&common->irqlock, flags);
 227
 228 }
 229
 230 static void vpif_wait_prepare(struct vb2_queue *vq)
 231 {
 232         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 233         struct channel_obj *ch = fh->channel;
 234         struct common_obj *common;
 235
 236         common = &ch->common[VPIF_VIDEO_INDEX];
 237         mutex_unlock(&common->lock);
 238 }
 239
 240 static void vpif_wait_finish(struct vb2_queue *vq)
 241 {
 242         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 243         struct channel_obj *ch = fh->channel;
 244         struct common_obj *common;
 245
 246         common = &ch->common[VPIF_VIDEO_INDEX];
 247         mutex_lock(&common->lock);
 248 }
 249
 250 static int vpif_buffer_init(struct vb2_buffer *vb)
 251 {
 252         struct vpif_cap_buffer *buf = container_of(vb,
 253                                         struct vpif_cap_buffer, vb);
 254
 255         INIT_LIST_HEAD(&buf->list);
 256
 257         return 0;
 258 }
 259
 260 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
 261         { {1, 1} };
 262
 263 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 264 {
 265         struct vpif_capture_config *vpif_config_data =
 266                                         vpif_dev->platform_data;
 267         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 268         struct channel_obj *ch = fh->channel;
 269         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 270         struct vpif_params *vpif = &ch->vpifparams;
 271         unsigned long addr = 0;
 272         unsigned long flags;
 273         int ret;
 274
 275         /* If buffer queue is empty, return error */
 276         spin_lock_irqsave(&common->irqlock, flags);
 277         if (list_empty(&common->dma_queue)) {
 278                 spin_unlock_irqrestore(&common->irqlock, flags);
 279                 vpif_dbg(1, debug, "buffer queue is empty\n");
 280                 return -EIO;
 281         }
 282
 283         /* Get the next frame from the buffer queue */
 284         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
 285                                     struct vpif_cap_buffer, list);
 286         /* Remove buffer from the buffer queue */
 287         list_del(&common->cur_frm->list);
 288         spin_unlock_irqrestore(&common->irqlock, flags);
 289         /* Mark state of the current frame to active */
 290         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 291         /* Initialize field_id and started member */
 292         ch->field_id = 0;
 293         common->started = 1;
 294         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 295
 296         /* Calculate the offset for Y and C data in the buffer */
 297         vpif_calculate_offsets(ch);
 298
 299         if ((vpif->std_info.frm_fmt &&
 300             ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
 301              (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
 302             (!vpif->std_info.frm_fmt &&
 303              (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
 304                 vpif_dbg(1, debug, "conflict in field format and std format\n");
 305                 return -EINVAL;
 306         }
 307
 308         /* configure 1 or 2 channel mode */
 309         if (vpif_config_data->setup_input_channel_mode) {
 310                 ret = vpif_config_data->
 311                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
 312                 if (ret < 0) {
 313                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
 314                         return ret;
 315                 }
 316         }
 317
 318         /* Call vpif_set_params function to set the parameters and addresses */
 319         ret = vpif_set_video_params(vpif, ch->channel_id);
 320
 321         if (ret < 0) {
 322                 vpif_dbg(1, debug, "can't set video params\n");
 323                 return ret;
 324         }
 325
 326         common->started = ret;
 327         vpif_config_addr(ch, ret);
 328
 329         common->set_addr(addr + common->ytop_off,
 330                          addr + common->ybtm_off,
 331                          addr + common->ctop_off,
 332                          addr + common->cbtm_off);
 333
 334         /**
 335          * Set interrupt for both the fields in VPIF Register enable channel in
 336          * VPIF register
 337          */
 338         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 339         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
 340                 channel0_intr_assert();
 341                 channel0_intr_enable(1);
 342                 enable_channel0(1);
 343         }
 344         if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
 345             (common->started == 2)) {
 346                 channel1_intr_assert();
 347                 channel1_intr_enable(1);
 348                 enable_channel1(1);
 349         }
 350
 351         return 0;
 352 }
 353
 354 /* abort streaming and wait for last buffer */
 355 static int vpif_stop_streaming(struct vb2_queue *vq)
 356 {
 357         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 358         struct channel_obj *ch = fh->channel;
 359         struct common_obj *common;
 360         unsigned long flags;
 361
 362         if (!vb2_is_streaming(vq))
 363                 return 0;
 364
 365         common = &ch->common[VPIF_VIDEO_INDEX];
 366
 367         /* release all active buffers */
 368         spin_lock_irqsave(&common->irqlock, flags);
 369         while (!list_empty(&common->dma_queue)) {
 370                 common->next_frm = list_entry(common->dma_queue.next,
 371                                                 struct vpif_cap_buffer, list);
 372                 list_del(&common->next_frm->list);
 373                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 374         }
 375         spin_unlock_irqrestore(&common->irqlock, flags);
 376
 377         return 0;
 378 }
 379
 380 static struct vb2_ops video_qops = {
 381         .queue_setup            = vpif_buffer_queue_setup,
 382         .wait_prepare           = vpif_wait_prepare,
 383         .wait_finish            = vpif_wait_finish,
 384         .buf_init               = vpif_buffer_init,
 385         .buf_prepare            = vpif_buffer_prepare,
 386         .start_streaming        = vpif_start_streaming,
 387         .stop_streaming         = vpif_stop_streaming,
 388         .buf_cleanup            = vpif_buf_cleanup,
 389         .buf_queue              = vpif_buffer_queue,
 390 };
 391
 392 /**
 393  * vpif_process_buffer_complete: process a completed buffer
 394  * @common: ptr to common channel object
 395  *
 396  * This function time stamp the buffer and mark it as DONE. It also
 397  * wake up any process waiting on the QUEUE and set the next buffer
 398  * as current
 399  */
 400 static void vpif_process_buffer_complete(struct common_obj *common)
 401 {
 402         v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 403         vb2_buffer_done(&common->cur_frm->vb,
 404                                             VB2_BUF_STATE_DONE);
 405         /* Make curFrm pointing to nextFrm */
 406         common->cur_frm = common->next_frm;
 407 }
 408
 409 /**
 410  * vpif_schedule_next_buffer: set next buffer address for capture
 411  * @common : ptr to common channel object
 412  *
 413  * This function will get next buffer from the dma queue and
 414  * set the buffer address in the vpif register for capture.
 415  * the buffer is marked active
 416  */
 417 static void vpif_schedule_next_buffer(struct common_obj *common)
 418 {
 419         unsigned long addr = 0;
 420
 421         spin_lock(&common->irqlock);
 422         common->next_frm = list_entry(common->dma_queue.next,
 423                                      struct vpif_cap_buffer, list);
 424         /* Remove that buffer from the buffer queue */
 425         list_del(&common->next_frm->list);
 426         spin_unlock(&common->irqlock);
 427         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 428         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 429
 430         /* Set top and bottom field addresses in VPIF registers */
 431         common->set_addr(addr + common->ytop_off,
 432                          addr + common->ybtm_off,
 433                          addr + common->ctop_off,
 434                          addr + common->cbtm_off);
 435 }
 436
 437 /**
 438  * vpif_channel_isr : ISR handler for vpif capture
 439  * @irq: irq number
 440  * @dev_id: dev_id ptr
 441  *
 442  * It changes status of the captured buffer, takes next buffer from the queue
 443  * and sets its address in VPIF registers
 444  */
 445 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 446 {
 447         struct vpif_device *dev = &vpif_obj;
 448         struct common_obj *common;
 449         struct channel_obj *ch;
 450         enum v4l2_field field;
 451         int channel_id = 0;
 452         int fid = -1, i;
 453
 454         channel_id = *(int *)(dev_id);
 455         if (!vpif_intr_status(channel_id))
 456                 return IRQ_NONE;
 457
 458         ch = dev->dev[channel_id];
 459
 460         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 461
 462         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
 463                 common = &ch->common[i];
 464                 /* skip If streaming is not started in this channel */
 465                 if (0 == common->started)
 466                         continue;
 467
 468                 /* Check the field format */
 469                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 470                         /* Progressive mode */
 471                         spin_lock(&common->irqlock);
 472                         if (list_empty(&common->dma_queue)) {
 473                                 spin_unlock(&common->irqlock);
 474                                 continue;
 475                         }
 476                         spin_unlock(&common->irqlock);
 477
 478                         if (!channel_first_int[i][channel_id])
 479                                 vpif_process_buffer_complete(common);
 480
 481                         channel_first_int[i][channel_id] = 0;
 482
 483                         vpif_schedule_next_buffer(common);
 484
 485
 486                         channel_first_int[i][channel_id] = 0;
 487                 } else {
 488                         /**
 489                          * Interlaced mode. If it is first interrupt, ignore
 490                          * it
 491                          */
 492                         if (channel_first_int[i][channel_id]) {
 493                                 channel_first_int[i][channel_id] = 0;
 494                                 continue;
 495                         }
 496                         if (0 == i) {
 497                                 ch->field_id ^= 1;
 498                                 /* Get field id from VPIF registers */
 499                                 fid = vpif_channel_getfid(ch->channel_id);
 500                                 if (fid != ch->field_id) {
 501                                         /**
 502                                          * If field id does not match stored
 503                                          * field id, make them in sync
 504                                          */
 505                                         if (0 == fid)
 506                                                 ch->field_id = fid;
 507                                         return IRQ_HANDLED;
 508                                 }
 509                         }
 510                         /* device field id and local field id are in sync */
 511                         if (0 == fid) {
 512                                 /* this is even field */
 513                                 if (common->cur_frm == common->next_frm)
 514                                         continue;
 515
 516                                 /* mark the current buffer as done */
 517                                 vpif_process_buffer_complete(common);
 518                         } else if (1 == fid) {
 519                                 /* odd field */
 520                                 spin_lock(&common->irqlock);
 521                                 if (list_empty(&common->dma_queue) ||
 522                                     (common->cur_frm != common->next_frm)) {
 523                                         spin_unlock(&common->irqlock);
 524                                         continue;
 525                                 }
 526                                 spin_unlock(&common->irqlock);
 527
 528                                 vpif_schedule_next_buffer(common);
 529                         }
 530                 }
 531         }
 532         return IRQ_HANDLED;
 533 }
 534
 535 /**
 536  * vpif_update_std_info() - update standard related info
 537  * @ch: ptr to channel object
 538  *
 539  * For a given standard selected by application, update values
 540  * in the device data structures
 541  */
 542 static int vpif_update_std_info(struct channel_obj *ch)
 543 {
 544         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 545         struct vpif_params *vpifparams = &ch->vpifparams;
 546         const struct vpif_channel_config_params *config;
 547         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 548         struct video_obj *vid_ch = &ch->video;
 549         int index;
 550
 551         vpif_dbg(2, debug, "vpif_update_std_info\n");
 552
 553         for (index = 0; index < vpif_ch_params_count; index++) {
 554                 config = &vpif_ch_params[index];
 555                 if (config->hd_sd == 0) {
 556                         vpif_dbg(2, debug, "SD format\n");
 557                         if (config->stdid & vid_ch->stdid) {
 558                                 memcpy(std_info, config, sizeof(*config));
 559                                 break;
 560                         }
 561                 } else {
 562                         vpif_dbg(2, debug, "HD format\n");
 563                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
 564                                 sizeof(vid_ch->dv_timings))) {
 565                                 memcpy(std_info, config, sizeof(*config));
 566                                 break;
 567                         }
 568                 }
 569         }
 570
 571         /* standard not found */
 572         if (index == vpif_ch_params_count)
 573                 return -EINVAL;
 574
 575         common->fmt.fmt.pix.width = std_info->width;
 576         common->width = std_info->width;
 577         common->fmt.fmt.pix.height = std_info->height;
 578         common->height = std_info->height;
 579         common->fmt.fmt.pix.bytesperline = std_info->width;
 580         vpifparams->video_params.hpitch = std_info->width;
 581         vpifparams->video_params.storage_mode = std_info->frm_fmt;
 582
 583         return 0;
 584 }
 585
 586 /**
 587  * vpif_calculate_offsets : This function calculates buffers offsets
 588  * @ch : ptr to channel object
 589  *
 590  * This function calculates buffer offsets for Y and C in the top and
 591  * bottom field
 592  */
 593 static void vpif_calculate_offsets(struct channel_obj *ch)
 594 {
 595         unsigned int hpitch, vpitch, sizeimage;
 596         struct video_obj *vid_ch = &(ch->video);
 597         struct vpif_params *vpifparams = &ch->vpifparams;
 598         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 599         enum v4l2_field field = common->fmt.fmt.pix.field;
 600
 601         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
 602
 603         if (V4L2_FIELD_ANY == field) {
 604                 if (vpifparams->std_info.frm_fmt)
 605                         vid_ch->buf_field = V4L2_FIELD_NONE;
 606                 else
 607                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 608         } else
 609                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 610
 611         sizeimage = common->fmt.fmt.pix.sizeimage;
 612
 613         hpitch = common->fmt.fmt.pix.bytesperline;
 614         vpitch = sizeimage / (hpitch * 2);
 615
 616         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 617             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 618                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 619                 common->ytop_off = 0;
 620                 common->ybtm_off = hpitch;
 621                 common->ctop_off = sizeimage / 2;
 622                 common->cbtm_off = sizeimage / 2 + hpitch;
 623         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 624                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 625                 common->ytop_off = 0;
 626                 common->ybtm_off = sizeimage / 4;
 627                 common->ctop_off = sizeimage / 2;
 628                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 629         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 630                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 631                 common->ybtm_off = 0;
 632                 common->ytop_off = sizeimage / 4;
 633                 common->cbtm_off = sizeimage / 2;
 634                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 635         }
 636         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 637             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
 638                 vpifparams->video_params.storage_mode = 1;
 639         else
 640                 vpifparams->video_params.storage_mode = 0;
 641
 642         if (1 == vpifparams->std_info.frm_fmt)
 643                 vpifparams->video_params.hpitch =
 644                     common->fmt.fmt.pix.bytesperline;
 645         else {
 646                 if ((field == V4L2_FIELD_ANY)
 647                     || (field == V4L2_FIELD_INTERLACED))
 648                         vpifparams->video_params.hpitch =
 649                             common->fmt.fmt.pix.bytesperline * 2;
 650                 else
 651                         vpifparams->video_params.hpitch =
 652                             common->fmt.fmt.pix.bytesperline;
 653         }
 654
 655         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
 656 }
 657
 658 /**
 659  * vpif_config_format: configure default frame format in the device
 660  * ch : ptr to channel object
 661  */
 662 static void vpif_config_format(struct channel_obj *ch)
 663 {
 664         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 665
 666         vpif_dbg(2, debug, "vpif_config_format\n");
 667
 668         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 669         if (config_params.numbuffers[ch->channel_id] == 0)
 670                 common->memory = V4L2_MEMORY_USERPTR;
 671         else
 672                 common->memory = V4L2_MEMORY_MMAP;
 673
 674         common->fmt.fmt.pix.sizeimage
 675             = config_params.channel_bufsize[ch->channel_id];
 676
 677         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 678                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 679         else
 680                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 681         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 682 }
 683
 684 /**
 685  * vpif_get_default_field() - Get default field type based on interface
 686  * @vpif_params - ptr to vpif params
 687  */
 688 static inline enum v4l2_field vpif_get_default_field(
 689                                 struct vpif_interface *iface)
 690 {
 691         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
 692                                                 V4L2_FIELD_INTERLACED;
 693 }
 694
 695 /**
 696  * vpif_check_format()  - check given pixel format for compatibility
 697  * @ch - channel  ptr
 698  * @pixfmt - Given pixel format
 699  * @update - update the values as per hardware requirement
 700  *
 701  * Check the application pixel format for S_FMT and update the input
 702  * values as per hardware limits for TRY_FMT. The default pixel and
 703  * field format is selected based on interface type.
 704  */
 705 static int vpif_check_format(struct channel_obj *ch,
 706                              struct v4l2_pix_format *pixfmt,
 707                              int update)
 708 {
 709         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 710         struct vpif_params *vpif_params = &ch->vpifparams;
 711         enum v4l2_field field = pixfmt->field;
 712         u32 sizeimage, hpitch, vpitch;
 713         int ret = -EINVAL;
 714
 715         vpif_dbg(2, debug, "vpif_check_format\n");
 716         /**
 717          * first check for the pixel format. If if_type is Raw bayer,
 718          * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
 719          * V4L2_PIX_FMT_YUV422P is supported
 720          */
 721         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
 722                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
 723                         if (!update) {
 724                                 vpif_dbg(2, debug, "invalid pix format\n");
 725                                 goto exit;
 726                         }
 727                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 728                 }
 729         } else {
 730                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
 731                         if (!update) {
 732                                 vpif_dbg(2, debug, "invalid pixel format\n");
 733                                 goto exit;
 734                         }
 735                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 736                 }
 737         }
 738
 739         if (!(VPIF_VALID_FIELD(field))) {
 740                 if (!update) {
 741                         vpif_dbg(2, debug, "invalid field format\n");
 742                         goto exit;
 743                 }
 744                 /**
 745                  * By default use FIELD_NONE for RAW Bayer capture
 746                  * and FIELD_INTERLACED for other interfaces
 747                  */
 748                 field = vpif_get_default_field(&vpif_params->iface);
 749         } else if (field == V4L2_FIELD_ANY)
 750                 /* unsupported field. Use default */
 751                 field = vpif_get_default_field(&vpif_params->iface);
 752
 753         /* validate the hpitch */
 754         hpitch = pixfmt->bytesperline;
 755         if (hpitch < vpif_params->std_info.width) {
 756                 if (!update) {
 757                         vpif_dbg(2, debug, "invalid hpitch\n");
 758                         goto exit;
 759                 }
 760                 hpitch = vpif_params->std_info.width;
 761         }
 762
 763         sizeimage = pixfmt->sizeimage;
 764
 765         vpitch = sizeimage / (hpitch * 2);
 766
 767         /* validate the vpitch */
 768         if (vpitch < vpif_params->std_info.height) {
 769                 if (!update) {
 770                         vpif_dbg(2, debug, "Invalid vpitch\n");
 771                         goto exit;
 772                 }
 773                 vpitch = vpif_params->std_info.height;
 774         }
 775
 776         /* Check for 8 byte alignment */
 777         if (!ALIGN(hpitch, 8)) {
 778                 if (!update) {
 779                         vpif_dbg(2, debug, "invalid pitch alignment\n");
 780                         goto exit;
 781                 }
 782                 /* adjust to next 8 byte boundary */
 783                 hpitch = (((hpitch + 7) / 8) * 8);
 784         }
 785         /* if update is set, modify the bytesperline and sizeimage */
 786         if (update) {
 787                 pixfmt->bytesperline = hpitch;
 788                 pixfmt->sizeimage = hpitch * vpitch * 2;
 789         }
 790         /**
 791          * Image width and height is always based on current standard width and
 792          * height
 793          */
 794         pixfmt->width = common->fmt.fmt.pix.width;
 795         pixfmt->height = common->fmt.fmt.pix.height;
 796         return 0;
 797 exit:
 798         return ret;
 799 }
 800
 801 /**
 802  * vpif_config_addr() - function to configure buffer address in vpif
 803  * @ch - channel ptr
 804  * @muxmode - channel mux mode
 805  */
 806 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 807 {
 808         struct common_obj *common;
 809
 810         vpif_dbg(2, debug, "vpif_config_addr\n");
 811
 812         common = &(ch->common[VPIF_VIDEO_INDEX]);
 813
 814         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
 815                 common->set_addr = ch1_set_videobuf_addr;
 816         else if (2 == muxmode)
 817                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
 818         else
 819                 common->set_addr = ch0_set_videobuf_addr;
 820 }
 821
 822 /**
 823  * vpif_mmap : It is used to map kernel space buffers into user spaces
 824  * @filep: file pointer
 825  * @vma: ptr to vm_area_struct
 826  */
 827 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 828 {
 829         /* Get the channel object and file handle object */
 830         struct vpif_fh *fh = filep->private_data;
 831         struct channel_obj *ch = fh->channel;
 832         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 833         int ret;
 834
 835         vpif_dbg(2, debug, "vpif_mmap\n");
 836
 837         if (mutex_lock_interruptible(&common->lock))
 838                 return -ERESTARTSYS;
 839         ret = vb2_mmap(&common->buffer_queue, vma);
 840         mutex_unlock(&common->lock);
 841         return ret;
 842 }
 843
 844 /**
 845  * vpif_poll: It is used for select/poll system call
 846  * @filep: file pointer
 847  * @wait: poll table to wait
 848  */
 849 static unsigned int vpif_poll(struct file *filep, poll_table * wait)
 850 {
 851         struct vpif_fh *fh = filep->private_data;
 852         struct channel_obj *channel = fh->channel;
 853         struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
 854         unsigned int res = 0;
 855
 856         vpif_dbg(2, debug, "vpif_poll\n");
 857
 858         if (common->started) {
 859                 mutex_lock(&common->lock);
 860                 res = vb2_poll(&common->buffer_queue, filep, wait);
 861                 mutex_unlock(&common->lock);
 862         }
 863         return res;
 864 }
 865
 866 /**
 867  * vpif_open : vpif open handler
 868  * @filep: file ptr
 869  *
 870  * It creates object of file handle structure and stores it in private_data
 871  * member of filepointer
 872  */
 873 static int vpif_open(struct file *filep)
 874 {
 875         struct video_device *vdev = video_devdata(filep);
 876         struct common_obj *common;
 877         struct video_obj *vid_ch;
 878         struct channel_obj *ch;
 879         struct vpif_fh *fh;
 880
 881         vpif_dbg(2, debug, "vpif_open\n");
 882
 883         ch = video_get_drvdata(vdev);
 884
 885         vid_ch = &ch->video;
 886         common = &ch->common[VPIF_VIDEO_INDEX];
 887
 888         /* Allocate memory for the file handle object */
 889         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 890         if (NULL == fh) {
 891                 vpif_err("unable to allocate memory for file handle object\n");
 892                 return -ENOMEM;
 893         }
 894
 895         if (mutex_lock_interruptible(&common->lock)) {
 896                 kfree(fh);
 897                 return -ERESTARTSYS;
 898         }
 899         /* store pointer to fh in private_data member of filep */
 900         filep->private_data = fh;
 901         fh->channel = ch;
 902         fh->initialized = 0;
 903         /* If decoder is not initialized. initialize it */
 904         if (!ch->initialized) {
 905                 fh->initialized = 1;
 906                 ch->initialized = 1;
 907                 memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
 908         }
 909         /* Increment channel usrs counter */
 910         ch->usrs++;
 911         /* Set io_allowed member to false */
 912         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 913         /* Initialize priority of this instance to default priority */
 914         fh->prio = V4L2_PRIORITY_UNSET;
 915         v4l2_prio_open(&ch->prio, &fh->prio);
 916         mutex_unlock(&common->lock);
 917         return 0;
 918 }
 919
 920 /**
 921  * vpif_release : function to clean up file close
 922  * @filep: file pointer
 923  *
 924  * This function deletes buffer queue, frees the buffers and the vpif file
 925  * handle
 926  */
 927 static int vpif_release(struct file *filep)
 928 {
 929         struct vpif_fh *fh = filep->private_data;
 930         struct channel_obj *ch = fh->channel;
 931         struct common_obj *common;
 932
 933         vpif_dbg(2, debug, "vpif_release\n");
 934
 935         common = &ch->common[VPIF_VIDEO_INDEX];
 936
 937         mutex_lock(&common->lock);
 938         /* if this instance is doing IO */
 939         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 940                 /* Reset io_usrs member of channel object */
 941                 common->io_usrs = 0;
 942                 /* Disable channel as per its device type and channel id */
 943                 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 944                         enable_channel0(0);
 945                         channel0_intr_enable(0);
 946                 }
 947                 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
 948                     (2 == common->started)) {
 949                         enable_channel1(0);
 950                         channel1_intr_enable(0);
 951                 }
 952                 common->started = 0;
 953                 /* Free buffers allocated */
 954                 vb2_queue_release(&common->buffer_queue);
 955                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 956         }
 957
 958         /* Decrement channel usrs counter */
 959         ch->usrs--;
 960
 961         /* Close the priority */
 962         v4l2_prio_close(&ch->prio, fh->prio);
 963
 964         if (fh->initialized)
 965                 ch->initialized = 0;
 966
 967         mutex_unlock(&common->lock);
 968         filep->private_data = NULL;
 969         kfree(fh);
 970         return 0;
 971 }
 972
 973 /**
 974  * vpif_reqbufs() - request buffer handler
 975  * @file: file ptr
 976  * @priv: file handle
 977  * @reqbuf: request buffer structure ptr
 978  */
 979 static int vpif_reqbufs(struct file *file, void *priv,
 980                         struct v4l2_requestbuffers *reqbuf)
 981 {
 982         struct vpif_fh *fh = priv;
 983         struct channel_obj *ch = fh->channel;
 984         struct common_obj *common;
 985         u8 index = 0;
 986         struct vb2_queue *q;
 987         int ret;
 988
 989         vpif_dbg(2, debug, "vpif_reqbufs\n");
 990
 991         /**
 992          * This file handle has not initialized the channel,
 993          * It is not allowed to do settings
 994          */
 995         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
 996             || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
 997                 if (!fh->initialized) {
 998                         vpif_dbg(1, debug, "Channel Busy\n");
 999                         return -EBUSY;
1000                 }
1001         }
1002
1003         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type || !vpif_dev)
1004                 return -EINVAL;
1005
1006         index = VPIF_VIDEO_INDEX;
1007
1008         common = &ch->common[index];
1009
1010         if (0 != common->io_usrs)
1011                 return -EBUSY;
1012
1013         /* Initialize videobuf2 queue as per the buffer type */
1014         common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1015         if (IS_ERR(common->alloc_ctx)) {
1016                 vpif_err("Failed to get the context\n");
1017                 return PTR_ERR(common->alloc_ctx);
1018         }
1019         q = &common->buffer_queue;
1020         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1021         q->io_modes = VB2_MMAP | VB2_USERPTR;
1022         q->drv_priv = fh;
1023         q->ops = &video_qops;
1024         q->mem_ops = &vb2_dma_contig_memops;
1025         q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1026         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1027
1028         ret = vb2_queue_init(q);
1029         if (ret) {
1030                 vpif_err("vpif_capture: vb2_queue_init() failed\n");
1031                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1032                 return ret;
1033         }
1034         /* Set io allowed member of file handle to TRUE */
1035         fh->io_allowed[index] = 1;
1036         /* Increment io usrs member of channel object to 1 */
1037         common->io_usrs = 1;
1038         /* Store type of memory requested in channel object */
1039         common->memory = reqbuf->memory;
1040         INIT_LIST_HEAD(&common->dma_queue);
1041
1042         /* Allocate buffers */
1043         return vb2_reqbufs(&common->buffer_queue, reqbuf);
1044 }
1045
1046 /**
1047  * vpif_querybuf() - query buffer handler
1048  * @file: file ptr
1049  * @priv: file handle
1050  * @buf: v4l2 buffer structure ptr
1051  */
1052 static int vpif_querybuf(struct file *file, void *priv,
1053                                 struct v4l2_buffer *buf)
1054 {
1055         struct vpif_fh *fh = priv;
1056         struct channel_obj *ch = fh->channel;
1057         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1058
1059         vpif_dbg(2, debug, "vpif_querybuf\n");
1060
1061         if (common->fmt.type != buf->type)
1062                 return -EINVAL;
1063
1064         if (common->memory != V4L2_MEMORY_MMAP) {
1065                 vpif_dbg(1, debug, "Invalid memory\n");
1066                 return -EINVAL;
1067         }
1068
1069         return vb2_querybuf(&common->buffer_queue, buf);
1070 }
1071
1072 /**
1073  * vpif_qbuf() - query buffer handler
1074  * @file: file ptr
1075  * @priv: file handle
1076  * @buf: v4l2 buffer structure ptr
1077  */
1078 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1079 {
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         struct v4l2_buffer tbuf = *buf;
1085
1086         vpif_dbg(2, debug, "vpif_qbuf\n");
1087
1088         if (common->fmt.type != tbuf.type) {
1089                 vpif_err("invalid buffer type\n");
1090                 return -EINVAL;
1091         }
1092
1093         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1094                 vpif_err("fh io not allowed\n");
1095                 return -EACCES;
1096         }
1097
1098         return vb2_qbuf(&common->buffer_queue, buf);
1099 }
1100
1101 /**
1102  * vpif_dqbuf() - query buffer handler
1103  * @file: file ptr
1104  * @priv: file handle
1105  * @buf: v4l2 buffer structure ptr
1106  */
1107 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1108 {
1109         struct vpif_fh *fh = priv;
1110         struct channel_obj *ch = fh->channel;
1111         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1112
1113         vpif_dbg(2, debug, "vpif_dqbuf\n");
1114
1115         return vb2_dqbuf(&common->buffer_queue, buf,
1116                          (file->f_flags & O_NONBLOCK));
1117 }
1118
1119 /**
1120  * vpif_streamon() - streamon handler
1121  * @file: file ptr
1122  * @priv: file handle
1123  * @buftype: v4l2 buffer type
1124  */
1125 static int vpif_streamon(struct file *file, void *priv,
1126                                 enum v4l2_buf_type buftype)
1127 {
1128
1129         struct vpif_fh *fh = priv;
1130         struct channel_obj *ch = fh->channel;
1131         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1132         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1133         struct vpif_params *vpif;
1134         int ret = 0;
1135
1136         vpif_dbg(2, debug, "vpif_streamon\n");
1137
1138         vpif = &ch->vpifparams;
1139
1140         if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1141                 vpif_dbg(1, debug, "buffer type not supported\n");
1142                 return -EINVAL;
1143         }
1144
1145         /* If file handle is not allowed IO, return error */
1146         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1147                 vpif_dbg(1, debug, "io not allowed\n");
1148                 return -EACCES;
1149         }
1150
1151         /* If Streaming is already started, return error */
1152         if (common->started) {
1153                 vpif_dbg(1, debug, "channel->started\n");
1154                 return -EBUSY;
1155         }
1156
1157         if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
1158             oth_ch->common[VPIF_VIDEO_INDEX].started &&
1159             vpif->std_info.ycmux_mode == 0) ||
1160            ((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
1161             (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1162                 vpif_dbg(1, debug, "other channel is being used\n");
1163                 return -EBUSY;
1164         }
1165
1166         ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
1167         if (ret)
1168                 return ret;
1169
1170         /* Enable streamon on the sub device */
1171         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
1172
1173         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1174                 vpif_dbg(1, debug, "stream on failed in subdev\n");
1175                 return ret;
1176         }
1177
1178         /* Call vb2_streamon to start streaming in videobuf2 */
1179         ret = vb2_streamon(&common->buffer_queue, buftype);
1180         if (ret) {
1181                 vpif_dbg(1, debug, "vb2_streamon\n");
1182                 return ret;
1183         }
1184
1185         return ret;
1186 }
1187
1188 /**
1189  * vpif_streamoff() - streamoff handler
1190  * @file: file ptr
1191  * @priv: file handle
1192  * @buftype: v4l2 buffer type
1193  */
1194 static int vpif_streamoff(struct file *file, void *priv,
1195                                 enum v4l2_buf_type buftype)
1196 {
1197
1198         struct vpif_fh *fh = priv;
1199         struct channel_obj *ch = fh->channel;
1200         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1201         int ret;
1202
1203         vpif_dbg(2, debug, "vpif_streamoff\n");
1204
1205         if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1206                 vpif_dbg(1, debug, "buffer type not supported\n");
1207                 return -EINVAL;
1208         }
1209
1210         /* If io is allowed for this file handle, return error */
1211         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1212                 vpif_dbg(1, debug, "io not allowed\n");
1213                 return -EACCES;
1214         }
1215
1216         /* If streaming is not started, return error */
1217         if (!common->started) {
1218                 vpif_dbg(1, debug, "channel->started\n");
1219                 return -EINVAL;
1220         }
1221
1222         /* disable channel */
1223         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
1224                 enable_channel0(0);
1225                 channel0_intr_enable(0);
1226         } else {
1227                 enable_channel1(0);
1228                 channel1_intr_enable(0);
1229         }
1230
1231         common->started = 0;
1232
1233         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
1234
1235         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
1236                 vpif_dbg(1, debug, "stream off failed in subdev\n");
1237
1238         return vb2_streamoff(&common->buffer_queue, buftype);
1239 }
1240
1241 /**
1242  * vpif_input_to_subdev() - Maps input to sub device
1243  * @vpif_cfg - global config ptr
1244  * @chan_cfg - channel config ptr
1245  * @input_index - Given input index from application
1246  *
1247  * lookup the sub device information for a given input index.
1248  * we report all the inputs to application. inputs table also
1249  * has sub device name for the each input
1250  */
1251 static int vpif_input_to_subdev(
1252                 struct vpif_capture_config *vpif_cfg,
1253                 struct vpif_capture_chan_config *chan_cfg,
1254                 int input_index)
1255 {
1256         struct vpif_subdev_info *subdev_info;
1257         const char *subdev_name;
1258         int i;
1259
1260         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
1261
1262         subdev_name = chan_cfg->inputs[input_index].subdev_name;
1263         if (subdev_name == NULL)
1264                 return -1;
1265
1266         /* loop through the sub device list to get the sub device info */
1267         for (i = 0; i < vpif_cfg->subdev_count; i++) {
1268                 subdev_info = &vpif_cfg->subdev_info[i];
1269                 if (!strcmp(subdev_info->name, subdev_name))
1270                         return i;
1271         }
1272         return -1;
1273 }
1274
1275 /**
1276  * vpif_set_input() - Select an input
1277  * @vpif_cfg - global config ptr
1278  * @ch - channel
1279  * @_index - Given input index from application
1280  *
1281  * Select the given input.
1282  */
1283 static int vpif_set_input(
1284                 struct vpif_capture_config *vpif_cfg,
1285                 struct channel_obj *ch,
1286                 int index)
1287 {
1288         struct vpif_capture_chan_config *chan_cfg =
1289                         &vpif_cfg->chan_config[ch->channel_id];
1290         struct vpif_subdev_info *subdev_info = NULL;
1291         struct v4l2_subdev *sd = NULL;
1292         u32 input = 0, output = 0;
1293         int sd_index;
1294         int ret;
1295
1296         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
1297         if (sd_index >= 0) {
1298                 sd = vpif_obj.sd[sd_index];
1299                 subdev_info = &vpif_cfg->subdev_info[sd_index];
1300         }
1301
1302         /* first setup input path from sub device to vpif */
1303         if (sd && vpif_cfg->setup_input_path) {
1304                 ret = vpif_cfg->setup_input_path(ch->channel_id,
1305                                        subdev_info->name);
1306                 if (ret < 0) {
1307                         vpif_dbg(1, debug, "couldn't setup input path for the" \
1308                         " sub device %s, for input index %d\n",
1309                         subdev_info->name, index);
1310                         return ret;
1311                 }
1312         }
1313
1314         if (sd) {
1315                 input = chan_cfg->inputs[index].input_route;
1316                 output = chan_cfg->inputs[index].output_route;
1317                 ret = v4l2_subdev_call(sd, video, s_routing,
1318                                 input, output, 0);
1319                 if (ret < 0 && ret != -ENOIOCTLCMD) {
1320                         vpif_dbg(1, debug, "Failed to set input\n");
1321                         return ret;
1322                 }
1323         }
1324         ch->input_idx = index;
1325         ch->sd = sd;
1326         /* copy interface parameters to vpif */
1327         ch->vpifparams.iface = chan_cfg->vpif_if;
1328
1329         /* update tvnorms from the sub device input info */
1330         ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
1331         return 0;
1332 }
1333
1334 /**
1335  * vpif_querystd() - querystd handler
1336  * @file: file ptr
1337  * @priv: file handle
1338  * @std_id: ptr to std id
1339  *
1340  * This function is called to detect standard at the selected input
1341  */
1342 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1343 {
1344         struct vpif_fh *fh = priv;
1345         struct channel_obj *ch = fh->channel;
1346         int ret = 0;
1347
1348         vpif_dbg(2, debug, "vpif_querystd\n");
1349
1350         /* Call querystd function of decoder device */
1351         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
1352
1353         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1354                 return -ENODATA;
1355         if (ret) {
1356                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
1357                 return ret;
1358         }
1359
1360         return 0;
1361 }
1362
1363 /**
1364  * vpif_g_std() - get STD handler
1365  * @file: file ptr
1366  * @priv: file handle
1367  * @std_id: ptr to std id
1368  */
1369 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1370 {
1371         struct vpif_fh *fh = priv;
1372         struct channel_obj *ch = fh->channel;
1373
1374         vpif_dbg(2, debug, "vpif_g_std\n");
1375
1376         *std = ch->video.stdid;
1377         return 0;
1378 }
1379
1380 /**
1381  * vpif_s_std() - set STD handler
1382  * @file: file ptr
1383  * @priv: file handle
1384  * @std_id: ptr to std id
1385  */
1386 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1387 {
1388         struct vpif_fh *fh = priv;
1389         struct channel_obj *ch = fh->channel;
1390         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1391         int ret = 0;
1392
1393         vpif_dbg(2, debug, "vpif_s_std\n");
1394
1395         if (common->started) {
1396                 vpif_err("streaming in progress\n");
1397                 return -EBUSY;
1398         }
1399
1400         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1401             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1402                 if (!fh->initialized) {
1403                         vpif_dbg(1, debug, "Channel Busy\n");
1404                         return -EBUSY;
1405                 }
1406         }
1407
1408         ret = v4l2_prio_check(&ch->prio, fh->prio);
1409         if (0 != ret)
1410                 return ret;
1411
1412         fh->initialized = 1;
1413
1414         /* Call encoder subdevice function to set the standard */
1415         ch->video.stdid = std_id;
1416         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1417
1418         /* Get the information about the standard */
1419         if (vpif_update_std_info(ch)) {
1420                 vpif_err("Error getting the standard info\n");
1421                 return -EINVAL;
1422         }
1423
1424         /* Configure the default format information */
1425         vpif_config_format(ch);
1426
1427         /* set standard in the sub device */
1428         ret = v4l2_subdev_call(ch->sd, core, s_std, std_id);
1429         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1430                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1431                 return ret;
1432         }
1433         return 0;
1434 }
1435
1436 /**
1437  * vpif_enum_input() - ENUMINPUT handler
1438  * @file: file ptr
1439  * @priv: file handle
1440  * @input: ptr to input structure
1441  */
1442 static int vpif_enum_input(struct file *file, void *priv,
1443                                 struct v4l2_input *input)
1444 {
1445
1446         struct vpif_capture_config *config = vpif_dev->platform_data;
1447         struct vpif_capture_chan_config *chan_cfg;
1448         struct vpif_fh *fh = priv;
1449         struct channel_obj *ch = fh->channel;
1450
1451         chan_cfg = &config->chan_config[ch->channel_id];
1452
1453         if (input->index >= chan_cfg->input_count) {
1454                 vpif_dbg(1, debug, "Invalid input index\n");
1455                 return -EINVAL;
1456         }
1457
1458         memcpy(input, &chan_cfg->inputs[input->index].input,
1459                 sizeof(*input));
1460         return 0;
1461 }
1462
1463 /**
1464  * vpif_g_input() - Get INPUT handler
1465  * @file: file ptr
1466  * @priv: file handle
1467  * @index: ptr to input index
1468  */
1469 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
1470 {
1471         struct vpif_fh *fh = priv;
1472         struct channel_obj *ch = fh->channel;
1473
1474         *index = ch->input_idx;
1475         return 0;
1476 }
1477
1478 /**
1479  * vpif_s_input() - Set INPUT handler
1480  * @file: file ptr
1481  * @priv: file handle
1482  * @index: input index
1483  */
1484 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1485 {
1486         struct vpif_capture_config *config = vpif_dev->platform_data;
1487         struct vpif_capture_chan_config *chan_cfg;
1488         struct vpif_fh *fh = priv;
1489         struct channel_obj *ch = fh->channel;
1490         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1491         int ret;
1492
1493         chan_cfg = &config->chan_config[ch->channel_id];
1494
1495         if (index >= chan_cfg->input_count)
1496                 return -EINVAL;
1497
1498         if (common->started) {
1499                 vpif_err("Streaming in progress\n");
1500                 return -EBUSY;
1501         }
1502
1503         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1504             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1505                 if (!fh->initialized) {
1506                         vpif_dbg(1, debug, "Channel Busy\n");
1507                         return -EBUSY;
1508                 }
1509         }
1510
1511         ret = v4l2_prio_check(&ch->prio, fh->prio);
1512         if (0 != ret)
1513                 return ret;
1514
1515         fh->initialized = 1;
1516         return vpif_set_input(config, ch, index);
1517 }
1518
1519 /**
1520  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1521  * @file: file ptr
1522  * @priv: file handle
1523  * @index: input index
1524  */
1525 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
1526                                         struct v4l2_fmtdesc *fmt)
1527 {
1528         struct vpif_fh *fh = priv;
1529         struct channel_obj *ch = fh->channel;
1530
1531         if (fmt->index != 0) {
1532                 vpif_dbg(1, debug, "Invalid format index\n");
1533                 return -EINVAL;
1534         }
1535
1536         /* Fill in the information about format */
1537         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1538                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1539                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1540                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1541         } else {
1542                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1543                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1544                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1545         }
1546         return 0;
1547 }
1548
1549 /**
1550  * vpif_try_fmt_vid_cap() - TRY_FMT handler
1551  * @file: file ptr
1552  * @priv: file handle
1553  * @fmt: ptr to v4l2 format structure
1554  */
1555 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1556                                 struct v4l2_format *fmt)
1557 {
1558         struct vpif_fh *fh = priv;
1559         struct channel_obj *ch = fh->channel;
1560         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1561
1562         return vpif_check_format(ch, pixfmt, 1);
1563 }
1564
1565
1566 /**
1567  * vpif_g_fmt_vid_cap() - Set INPUT handler
1568  * @file: file ptr
1569  * @priv: file handle
1570  * @fmt: ptr to v4l2 format structure
1571  */
1572 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1573                                 struct v4l2_format *fmt)
1574 {
1575         struct vpif_fh *fh = priv;
1576         struct channel_obj *ch = fh->channel;
1577         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1578
1579         /* Check the validity of the buffer type */
1580         if (common->fmt.type != fmt->type)
1581                 return -EINVAL;
1582
1583         /* Fill in the information about format */
1584         *fmt = common->fmt;
1585         return 0;
1586 }
1587
1588 /**
1589  * vpif_s_fmt_vid_cap() - Set FMT handler
1590  * @file: file ptr
1591  * @priv: file handle
1592  * @fmt: ptr to v4l2 format structure
1593  */
1594 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1595                                 struct v4l2_format *fmt)
1596 {
1597         struct vpif_fh *fh = priv;
1598         struct channel_obj *ch = fh->channel;
1599         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1600         struct v4l2_pix_format *pixfmt;
1601         int ret = 0;
1602
1603         vpif_dbg(2, debug, "%s\n", __func__);
1604
1605         /* If streaming is started, return error */
1606         if (common->started) {
1607                 vpif_dbg(1, debug, "Streaming is started\n");
1608                 return -EBUSY;
1609         }
1610
1611         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1612             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1613                 if (!fh->initialized) {
1614                         vpif_dbg(1, debug, "Channel Busy\n");
1615                         return -EBUSY;
1616                 }
1617         }
1618
1619         ret = v4l2_prio_check(&ch->prio, fh->prio);
1620         if (0 != ret)
1621                 return ret;
1622
1623         fh->initialized = 1;
1624
1625         pixfmt = &fmt->fmt.pix;
1626         /* Check for valid field format */
1627         ret = vpif_check_format(ch, pixfmt, 0);
1628
1629         if (ret)
1630                 return ret;
1631         /* store the format in the channel object */
1632         common->fmt = *fmt;
1633         return 0;
1634 }
1635
1636 /**
1637  * vpif_querycap() - QUERYCAP handler
1638  * @file: file ptr
1639  * @priv: file handle
1640  * @cap: ptr to v4l2_capability structure
1641  */
1642 static int vpif_querycap(struct file *file, void  *priv,
1643                                 struct v4l2_capability *cap)
1644 {
1645         struct vpif_capture_config *config = vpif_dev->platform_data;
1646
1647         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1648         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1649         snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
1650         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1651                  dev_name(vpif_dev));
1652         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1653
1654         return 0;
1655 }
1656
1657 /**
1658  * vpif_g_priority() - get priority handler
1659  * @file: file ptr
1660  * @priv: file handle
1661  * @prio: ptr to v4l2_priority structure
1662  */
1663 static int vpif_g_priority(struct file *file, void *priv,
1664                            enum v4l2_priority *prio)
1665 {
1666         struct vpif_fh *fh = priv;
1667         struct channel_obj *ch = fh->channel;
1668
1669         *prio = v4l2_prio_max(&ch->prio);
1670
1671         return 0;
1672 }
1673
1674 /**
1675  * vpif_s_priority() - set priority handler
1676  * @file: file ptr
1677  * @priv: file handle
1678  * @prio: ptr to v4l2_priority structure
1679  */
1680 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1681 {
1682         struct vpif_fh *fh = priv;
1683         struct channel_obj *ch = fh->channel;
1684
1685         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1686 }
1687
1688 /**
1689  * vpif_cropcap() - cropcap handler
1690  * @file: file ptr
1691  * @priv: file handle
1692  * @crop: ptr to v4l2_cropcap structure
1693  */
1694 static int vpif_cropcap(struct file *file, void *priv,
1695                         struct v4l2_cropcap *crop)
1696 {
1697         struct vpif_fh *fh = priv;
1698         struct channel_obj *ch = fh->channel;
1699         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1700
1701         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
1702                 return -EINVAL;
1703
1704         crop->bounds.left = 0;
1705         crop->bounds.top = 0;
1706         crop->bounds.height = common->height;
1707         crop->bounds.width = common->width;
1708         crop->defrect = crop->bounds;
1709         return 0;
1710 }
1711
1712 /**
1713  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1714  * @file: file ptr
1715  * @priv: file handle
1716  * @timings: input timings
1717  */
1718 static int
1719 vpif_enum_dv_timings(struct file *file, void *priv,
1720                      struct v4l2_enum_dv_timings *timings)
1721 {
1722         struct vpif_fh *fh = priv;
1723         struct channel_obj *ch = fh->channel;
1724         int ret;
1725
1726         ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1727         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1728                 return -EINVAL;
1729         return ret;
1730 }
1731
1732 /**
1733  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1734  * @file: file ptr
1735  * @priv: file handle
1736  * @timings: input timings
1737  */
1738 static int
1739 vpif_query_dv_timings(struct file *file, void *priv,
1740                       struct v4l2_dv_timings *timings)
1741 {
1742         struct vpif_fh *fh = priv;
1743         struct channel_obj *ch = fh->channel;
1744         int ret;
1745
1746         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1747         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1748                 return -ENODATA;
1749         return ret;
1750 }
1751
1752 /**
1753  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1754  * @file: file ptr
1755  * @priv: file handle
1756  * @timings: digital video timings
1757  */
1758 static int vpif_s_dv_timings(struct file *file, void *priv,
1759                 struct v4l2_dv_timings *timings)
1760 {
1761         struct vpif_fh *fh = priv;
1762         struct channel_obj *ch = fh->channel;
1763         struct vpif_params *vpifparams = &ch->vpifparams;
1764         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1765         struct video_obj *vid_ch = &ch->video;
1766         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1767         int ret;
1768
1769         if (timings->type != V4L2_DV_BT_656_1120) {
1770                 vpif_dbg(2, debug, "Timing type not defined\n");
1771                 return -EINVAL;
1772         }
1773
1774         /* Configure subdevice timings, if any */
1775         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1776         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1777                 ret = 0;
1778         if (ret < 0) {
1779                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1780                 return ret;
1781         }
1782
1783         if (!(timings->bt.width && timings->bt.height &&
1784                                 (timings->bt.hbackporch ||
1785                                  timings->bt.hfrontporch ||
1786                                  timings->bt.hsync) &&
1787                                 timings->bt.vfrontporch &&
1788                                 (timings->bt.vbackporch ||
1789                                  timings->bt.vsync))) {
1790                 vpif_dbg(2, debug, "Timings for width, height, "
1791                                 "horizontal back porch, horizontal sync, "
1792                                 "horizontal front porch, vertical back porch, "
1793                                 "vertical sync and vertical back porch "
1794                                 "must be defined\n");
1795                 return -EINVAL;
1796         }
1797
1798         vid_ch->dv_timings = *timings;
1799
1800         /* Configure video port timings */
1801
1802         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1803         std_info->sav2eav = bt->width;
1804
1805         std_info->l1 = 1;
1806         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1807
1808         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1809         if (bt->interlaced) {
1810                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1811                         std_info->l5 = std_info->vsize/2 -
1812                                 (bt->vfrontporch - 1);
1813                         std_info->l7 = std_info->vsize/2 + 1;
1814                         std_info->l9 = std_info->l7 + bt->il_vsync +
1815                                 bt->il_vbackporch + 1;
1816                         std_info->l11 = std_info->vsize -
1817                                 (bt->il_vfrontporch - 1);
1818                 } else {
1819                         vpif_dbg(2, debug, "Required timing values for "
1820                                         "interlaced BT format missing\n");
1821                         return -EINVAL;
1822                 }
1823         } else {
1824                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1825         }
1826         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1827         std_info->width = bt->width;
1828         std_info->height = bt->height;
1829         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1830         std_info->ycmux_mode = 0;
1831         std_info->capture_format = 0;
1832         std_info->vbi_supported = 0;
1833         std_info->hd_sd = 1;
1834         std_info->stdid = 0;
1835
1836         vid_ch->stdid = 0;
1837         return 0;
1838 }
1839
1840 /**
1841  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1842  * @file: file ptr
1843  * @priv: file handle
1844  * @timings: digital video timings
1845  */
1846 static int vpif_g_dv_timings(struct file *file, void *priv,
1847                 struct v4l2_dv_timings *timings)
1848 {
1849         struct vpif_fh *fh = priv;
1850         struct channel_obj *ch = fh->channel;
1851         struct video_obj *vid_ch = &ch->video;
1852
1853         *timings = vid_ch->dv_timings;
1854
1855         return 0;
1856 }
1857
1858 /*
1859  * vpif_log_status() - Status information
1860  * @file: file ptr
1861  * @priv: file handle
1862  *
1863  * Returns zero.
1864  */
1865 static int vpif_log_status(struct file *filep, void *priv)
1866 {
1867         /* status for sub devices */
1868         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1869
1870         return 0;
1871 }
1872
1873 /* vpif capture ioctl operations */
1874 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1875         .vidioc_querycap                = vpif_querycap,
1876         .vidioc_g_priority              = vpif_g_priority,
1877         .vidioc_s_priority              = vpif_s_priority,
1878         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1879         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1880         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1881         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1882         .vidioc_enum_input              = vpif_enum_input,
1883         .vidioc_s_input                 = vpif_s_input,
1884         .vidioc_g_input                 = vpif_g_input,
1885         .vidioc_reqbufs                 = vpif_reqbufs,
1886         .vidioc_querybuf                = vpif_querybuf,
1887         .vidioc_querystd                = vpif_querystd,
1888         .vidioc_s_std                   = vpif_s_std,
1889         .vidioc_g_std                   = vpif_g_std,
1890         .vidioc_qbuf                    = vpif_qbuf,
1891         .vidioc_dqbuf                   = vpif_dqbuf,
1892         .vidioc_streamon                = vpif_streamon,
1893         .vidioc_streamoff               = vpif_streamoff,
1894         .vidioc_cropcap                 = vpif_cropcap,
1895         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1896         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1897         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1898         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1899         .vidioc_log_status              = vpif_log_status,
1900 };
1901
1902 /* vpif file operations */
1903 static struct v4l2_file_operations vpif_fops = {
1904         .owner = THIS_MODULE,
1905         .open = vpif_open,
1906         .release = vpif_release,
1907         .unlocked_ioctl = video_ioctl2,
1908         .mmap = vpif_mmap,
1909         .poll = vpif_poll
1910 };
1911
1912 /* vpif video template */
1913 static struct video_device vpif_video_template = {
1914         .name           = "vpif",
1915         .fops           = &vpif_fops,
1916         .minor          = -1,
1917         .ioctl_ops      = &vpif_ioctl_ops,
1918 };
1919
1920 /**
1921  * initialize_vpif() - Initialize vpif data structures
1922  *
1923  * Allocate memory for data structures and initialize them
1924  */
1925 static int initialize_vpif(void)
1926 {
1927         int err = 0, i, j;
1928         int free_channel_objects_index;
1929
1930         /* Default number of buffers should be 3 */
1931         if ((ch0_numbuffers > 0) &&
1932             (ch0_numbuffers < config_params.min_numbuffers))
1933                 ch0_numbuffers = config_params.min_numbuffers;
1934         if ((ch1_numbuffers > 0) &&
1935             (ch1_numbuffers < config_params.min_numbuffers))
1936                 ch1_numbuffers = config_params.min_numbuffers;
1937
1938         /* Set buffer size to min buffers size if it is invalid */
1939         if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
1940                 ch0_bufsize =
1941                     config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
1942         if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
1943                 ch1_bufsize =
1944                     config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
1945
1946         config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
1947         config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
1948         if (ch0_numbuffers) {
1949                 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
1950                     = ch0_bufsize;
1951         }
1952         if (ch1_numbuffers) {
1953                 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
1954                     = ch1_bufsize;
1955         }
1956
1957         /* Allocate memory for six channel objects */
1958         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1959                 vpif_obj.dev[i] =
1960                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1961                 /* If memory allocation fails, return error */
1962                 if (!vpif_obj.dev[i]) {
1963                         free_channel_objects_index = i;
1964                         err = -ENOMEM;
1965                         goto vpif_init_free_channel_objects;
1966                 }
1967         }
1968         return 0;
1969
1970 vpif_init_free_channel_objects:
1971         for (j = 0; j < free_channel_objects_index; j++)
1972                 kfree(vpif_obj.dev[j]);
1973         return err;
1974 }
1975
1976 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1977                             struct v4l2_subdev *subdev,
1978                             struct v4l2_async_subdev *asd)
1979 {
1980         int i;
1981
1982         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1983                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1984                             subdev->name)) {
1985                         vpif_obj.sd[i] = subdev;
1986                         return 0;
1987                 }
1988
1989         return -EINVAL;
1990 }
1991
1992 static int vpif_probe_complete(void)
1993 {
1994         struct common_obj *common;
1995         struct channel_obj *ch;
1996         int i, j, err, k;
1997
1998         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1999                 ch = vpif_obj.dev[j];
2000                 ch->channel_id = j;
2001                 common = &(ch->common[VPIF_VIDEO_INDEX]);
2002                 spin_lock_init(&common->irqlock);
2003                 mutex_init(&common->lock);
2004                 ch->video_dev->lock = &common->lock;
2005                 /* Initialize prio member of channel object */
2006                 v4l2_prio_init(&ch->prio);
2007                 video_set_drvdata(ch->video_dev, ch);
2008
2009                 /* select input 0 */
2010                 err = vpif_set_input(vpif_obj.config, ch, 0);
2011                 if (err)
2012                         goto probe_out;
2013
2014                 err = video_register_device(ch->video_dev,
2015                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
2016                 if (err)
2017                         goto probe_out;
2018         }
2019
2020         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
2021         return 0;
2022
2023 probe_out:
2024         for (k = 0; k < j; k++) {
2025                 /* Get the pointer to the channel object */
2026                 ch = vpif_obj.dev[k];
2027                 /* Unregister video device */
2028                 video_unregister_device(ch->video_dev);
2029         }
2030         kfree(vpif_obj.sd);
2031         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2032                 ch = vpif_obj.dev[i];
2033                 /* Note: does nothing if ch->video_dev == NULL */
2034                 video_device_release(ch->video_dev);
2035         }
2036         v4l2_device_unregister(&vpif_obj.v4l2_dev);
2037
2038         return err;
2039 }
2040
2041 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
2042 {
2043         return vpif_probe_complete();
2044 }
2045
2046 /**
2047  * vpif_probe : This function probes the vpif capture driver
2048  * @pdev: platform device pointer
2049  *
2050  * This creates device entries by register itself to the V4L2 driver and
2051  * initializes fields of each channel objects
2052  */
2053 static __init int vpif_probe(struct platform_device *pdev)
2054 {
2055         struct vpif_subdev_info *subdevdata;
2056         int i, j, err;
2057         int res_idx = 0;
2058         struct i2c_adapter *i2c_adap;
2059         struct channel_obj *ch;
2060         struct video_device *vfd;
2061         struct resource *res;
2062         int subdev_count;
2063         size_t size;
2064
2065         vpif_dev = &pdev->dev;
2066
2067         err = initialize_vpif();
2068         if (err) {
2069                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
2070                 return err;
2071         }
2072
2073         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
2074         if (err) {
2075                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
2076                 return err;
2077         }
2078
2079         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
2080                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
2081                                         IRQF_SHARED, "VPIF_Capture",
2082                                         (void *)(&vpif_obj.dev[res_idx]->
2083                                         channel_id));
2084                 if (err) {
2085                         err = -EINVAL;
2086                         goto vpif_unregister;
2087                 }
2088                 res_idx++;
2089         }
2090
2091         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2092                 /* Get the pointer to the channel object */
2093                 ch = vpif_obj.dev[i];
2094                 /* Allocate memory for video device */
2095                 vfd = video_device_alloc();
2096                 if (NULL == vfd) {
2097                         for (j = 0; j < i; j++) {
2098                                 ch = vpif_obj.dev[j];
2099                                 video_device_release(ch->video_dev);
2100                         }
2101                         err = -ENOMEM;
2102                         goto vpif_unregister;
2103                 }
2104
2105                 /* Initialize field of video device */
2106                 *vfd = vpif_video_template;
2107                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
2108                 vfd->release = video_device_release;
2109                 snprintf(vfd->name, sizeof(vfd->name),
2110                          "VPIF_Capture_DRIVER_V%s",
2111                          VPIF_CAPTURE_VERSION);
2112                 /* Set video_dev to the video device */
2113                 ch->video_dev = vfd;
2114         }
2115
2116         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2117         if (res) {
2118                 size = resource_size(res);
2119                 /* The resources are divided into two equal memory and when we
2120                  * have HD output we can add them together
2121                  */
2122                 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
2123                         ch = vpif_obj.dev[j];
2124                         ch->channel_id = j;
2125                         /* only enabled if second resource exists */
2126                         config_params.video_limit[ch->channel_id] = 0;
2127                         if (size)
2128                                 config_params.video_limit[ch->channel_id] =
2129                                                                         size/2;
2130                 }
2131         }
2132
2133         vpif_obj.config = pdev->dev.platform_data;
2134
2135         subdev_count = vpif_obj.config->subdev_count;
2136         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
2137                                 GFP_KERNEL);
2138         if (vpif_obj.sd == NULL) {
2139                 vpif_err("unable to allocate memory for subdevice pointers\n");
2140                 err = -ENOMEM;
2141                 goto vpif_sd_error;
2142         }
2143
2144         if (!vpif_obj.config->asd_sizes) {
2145                 i2c_adap = i2c_get_adapter(1);
2146                 for (i = 0; i < subdev_count; i++) {
2147                         subdevdata = &vpif_obj.config->subdev_info[i];
2148                         vpif_obj.sd[i] =
2149                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
2150                                                           i2c_adap,
2151                                                           &subdevdata->
2152                                                           board_info,
2153                                                           NULL);
2154
2155                         if (!vpif_obj.sd[i]) {
2156                                 vpif_err("Error registering v4l2 subdevice\n");
2157                                 err = -ENODEV;
2158                                 goto probe_subdev_out;
2159                         }
2160                         v4l2_info(&vpif_obj.v4l2_dev,
2161                                   "registered sub device %s\n",
2162                                    subdevdata->name);
2163                 }
2164                 vpif_probe_complete();
2165         } else {
2166                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
2167                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
2168                 vpif_obj.notifier.bound = vpif_async_bound;
2169                 vpif_obj.notifier.complete = vpif_async_complete;
2170                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
2171                                                    &vpif_obj.notifier);
2172                 if (err) {
2173                         vpif_err("Error registering async notifier\n");
2174                         err = -EINVAL;
2175                         goto probe_subdev_out;
2176                 }
2177         }
2178
2179         return 0;
2180
2181 probe_subdev_out:
2182         /* free sub devices memory */
2183         kfree(vpif_obj.sd);
2184
2185 vpif_sd_error:
2186         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2187                 ch = vpif_obj.dev[i];
2188                 /* Note: does nothing if ch->video_dev == NULL */
2189                 video_device_release(ch->video_dev);
2190         }
2191 vpif_unregister:
2192         v4l2_device_unregister(&vpif_obj.v4l2_dev);
2193
2194         return err;
2195 }
2196
2197 /**
2198  * vpif_remove() - driver remove handler
2199  * @device: ptr to platform device structure
2200  *
2201  * The vidoe device is unregistered
2202  */
2203 static int vpif_remove(struct platform_device *device)
2204 {
2205         struct channel_obj *ch;
2206         int i;
2207
2208         v4l2_device_unregister(&vpif_obj.v4l2_dev);
2209
2210         kfree(vpif_obj.sd);
2211         /* un-register device */
2212         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2213                 /* Get the pointer to the channel object */
2214                 ch = vpif_obj.dev[i];
2215                 /* Unregister video device */
2216                 video_unregister_device(ch->video_dev);
2217                 kfree(vpif_obj.dev[i]);
2218         }
2219         return 0;
2220 }
2221
2222 #ifdef CONFIG_PM
2223 /**
2224  * vpif_suspend: vpif device suspend
2225  */
2226 static int vpif_suspend(struct device *dev)
2227 {
2228
2229         struct common_obj *common;
2230         struct channel_obj *ch;
2231         int i;
2232
2233         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2234                 /* Get the pointer to the channel object */
2235                 ch = vpif_obj.dev[i];
2236                 common = &ch->common[VPIF_VIDEO_INDEX];
2237                 mutex_lock(&common->lock);
2238                 if (ch->usrs && common->io_usrs) {
2239                         /* Disable channel */
2240                         if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2241                                 enable_channel0(0);
2242                                 channel0_intr_enable(0);
2243                         }
2244                         if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2245                             common->started == 2) {
2246                                 enable_channel1(0);
2247                                 channel1_intr_enable(0);
2248                         }
2249                 }
2250                 mutex_unlock(&common->lock);
2251         }
2252
2253         return 0;
2254 }
2255
2256 /*
2257  * vpif_resume: vpif device suspend
2258  */
2259 static int vpif_resume(struct device *dev)
2260 {
2261         struct common_obj *common;
2262         struct channel_obj *ch;
2263         int i;
2264
2265         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2266                 /* Get the pointer to the channel object */
2267                 ch = vpif_obj.dev[i];
2268                 common = &ch->common[VPIF_VIDEO_INDEX];
2269                 mutex_lock(&common->lock);
2270                 if (ch->usrs && common->io_usrs) {
2271                         /* Disable channel */
2272                         if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2273                                 enable_channel0(1);
2274                                 channel0_intr_enable(1);
2275                         }
2276                         if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2277                             common->started == 2) {
2278                                 enable_channel1(1);
2279                                 channel1_intr_enable(1);
2280                         }
2281                 }
2282                 mutex_unlock(&common->lock);
2283         }
2284
2285         return 0;
2286 }
2287
2288 static const struct dev_pm_ops vpif_dev_pm_ops = {
2289         .suspend = vpif_suspend,
2290         .resume = vpif_resume,
2291 };
2292
2293 #define vpif_pm_ops (&vpif_dev_pm_ops)
2294 #else
2295 #define vpif_pm_ops NULL
2296 #endif
2297
2298 static __refdata struct platform_driver vpif_driver = {
2299         .driver = {
2300                 .name   = "vpif_capture",
2301                 .owner  = THIS_MODULE,
2302                 .pm     = vpif_pm_ops,
2303         },
2304         .probe = vpif_probe,
2305         .remove = vpif_remove,
2306 };
2307
2308 module_platform_driver(vpif_driver);