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 #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/slab.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-ioctl.h>
  39 #include <media/v4l2-chip-ident.h>
  40
  41 #include "vpif_capture.h"
  42 #include "vpif.h"
  43
  44 MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
  45 MODULE_LICENSE("GPL");
  46 MODULE_VERSION(VPIF_CAPTURE_VERSION);
  47
  48 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  49 #define vpif_dbg(level, debug, fmt, arg...)     \
  50                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  51
  52 static int debug = 1;
  53 static u32 ch0_numbuffers = 3;
  54 static u32 ch1_numbuffers = 3;
  55 static u32 ch0_bufsize = 1920 * 1080 * 2;
  56 static u32 ch1_bufsize = 720 * 576 * 2;
  57
  58 module_param(debug, int, 0644);
  59 module_param(ch0_numbuffers, uint, S_IRUGO);
  60 module_param(ch1_numbuffers, uint, S_IRUGO);
  61 module_param(ch0_bufsize, uint, S_IRUGO);
  62 module_param(ch1_bufsize, uint, S_IRUGO);
  63
  64 MODULE_PARM_DESC(debug, "Debug level 0-1");
  65 MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
  66 MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
  67 MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
  68 MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
  69
  70 static struct vpif_config_params config_params = {
  71         .min_numbuffers = 3,
  72         .numbuffers[0] = 3,
  73         .numbuffers[1] = 3,
  74         .min_bufsize[0] = 720 * 480 * 2,
  75         .min_bufsize[1] = 720 * 480 * 2,
  76         .channel_bufsize[0] = 1920 * 1080 * 2,
  77         .channel_bufsize[1] = 720 * 576 * 2,
  78 };
  79
  80 /* global variables */
  81 static struct vpif_device vpif_obj = { {NULL} };
  82 static struct device *vpif_dev;
  83 static void vpif_calculate_offsets(struct channel_obj *ch);
  84 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  85
  86 /**
  87  * buffer_prepare :  callback function for buffer prepare
  88  * @vb: ptr to vb2_buffer
  89  *
  90  * This is the callback function for buffer prepare when vb2_qbuf()
  91  * function is called. The buffer is prepared and user space virtual address
  92  * or user address is converted into  physical address
  93  */
  94 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  95 {
  96         /* Get the file handle object and channel object */
  97         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
  98         struct vb2_queue *q = vb->vb2_queue;
  99         struct channel_obj *ch = fh->channel;
 100         struct common_obj *common;
 101         unsigned long addr;
 102
 103         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
 104
 105         common = &ch->common[VPIF_VIDEO_INDEX];
 106
 107         if (vb->state != VB2_BUF_STATE_ACTIVE &&
 108                 vb->state != VB2_BUF_STATE_PREPARED) {
 109                 vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 110                 if (vb2_plane_vaddr(vb, 0) &&
 111                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 112                         goto exit;
 113                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 114
 115                 if (q->streaming) {
 116                         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 117                                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 118                                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
 119                                 !IS_ALIGNED((addr + common->cbtm_off), 8))
 120                                 goto exit;
 121                 }
 122         }
 123         return 0;
 124 exit:
 125         vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
 126         return -EINVAL;
 127 }
 128
 129 /**
 130  * vpif_buffer_queue_setup : Callback function for buffer setup.
 131  * @vq: vb2_queue ptr
 132  * @fmt: v4l2 format
 133  * @nbuffers: ptr to number of buffers requested by application
 134  * @nplanes:: contains number of distinct video planes needed to hold a frame
 135  * @sizes[]: contains the size (in bytes) of each plane.
 136  * @alloc_ctxs: ptr to allocation context
 137  *
 138  * This callback function is called when reqbuf() is called to adjust
 139  * the buffer count and buffer size
 140  */
 141 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 142                                 const struct v4l2_format *fmt,
 143                                 unsigned int *nbuffers, unsigned int *nplanes,
 144                                 unsigned int sizes[], void *alloc_ctxs[])
 145 {
 146         /* Get the file handle object and channel object */
 147         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 148         struct channel_obj *ch = fh->channel;
 149         struct common_obj *common;
 150         unsigned long size;
 151
 152         common = &ch->common[VPIF_VIDEO_INDEX];
 153
 154         vpif_dbg(2, debug, "vpif_buffer_setup\n");
 155
 156         /* If memory type is not mmap, return */
 157         if (V4L2_MEMORY_MMAP == common->memory) {
 158                 /* Calculate the size of the buffer */
 159                 size = config_params.channel_bufsize[ch->channel_id];
 160                 /*
 161                  * Checking if the buffer size exceeds the available buffer
 162                  * ycmux_mode = 0 means 1 channel mode HD and
 163                  * ycmux_mode = 1 means 2 channels mode SD
 164                  */
 165                 if (ch->vpifparams.std_info.ycmux_mode == 0) {
 166                         if (config_params.video_limit[ch->channel_id])
 167                                 while (size * *nbuffers >
 168                                         (config_params.video_limit[0]
 169                                                 + config_params.video_limit[1]))
 170                                         (*nbuffers)--;
 171                 } else {
 172                         if (config_params.video_limit[ch->channel_id])
 173                                 while (size * *nbuffers >
 174                                 config_params.video_limit[ch->channel_id])
 175                                         (*nbuffers)--;
 176                 }
 177
 178         } else {
 179                 size = common->fmt.fmt.pix.sizeimage;
 180         }
 181
 182         if (*nbuffers < config_params.min_numbuffers)
 183                 *nbuffers = config_params.min_numbuffers;
 184
 185         *nplanes = 1;
 186         sizes[0] = size;
 187         alloc_ctxs[0] = common->alloc_ctx;
 188
 189         return 0;
 190 }
 191
 192 /**
 193  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 194  * @vb: ptr to vb2_buffer
 195  */
 196 static void vpif_buffer_queue(struct vb2_buffer *vb)
 197 {
 198         /* Get the file handle object and channel object */
 199         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 200         struct channel_obj *ch = fh->channel;
 201         struct vpif_cap_buffer *buf = container_of(vb,
 202                                 struct vpif_cap_buffer, vb);
 203         struct common_obj *common;
 204         unsigned long flags;
 205
 206         common = &ch->common[VPIF_VIDEO_INDEX];
 207
 208         vpif_dbg(2, debug, "vpif_buffer_queue\n");
 209
 210         spin_lock_irqsave(&common->irqlock, flags);
 211         /* add the buffer to the DMA queue */
 212         list_add_tail(&buf->list, &common->dma_queue);
 213         spin_unlock_irqrestore(&common->irqlock, flags);
 214 }
 215
 216 /**
 217  * vpif_buf_cleanup : Callback function to free buffer
 218  * @vb: ptr to vb2_buffer
 219  *
 220  * This function is called from the videobuf2 layer to free memory
 221  * allocated to  the buffers
 222  */
 223 static void vpif_buf_cleanup(struct vb2_buffer *vb)
 224 {
 225         /* Get the file handle object and channel object */
 226         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 227         struct vpif_cap_buffer *buf = container_of(vb,
 228                                         struct vpif_cap_buffer, vb);
 229         struct channel_obj *ch = fh->channel;
 230         struct common_obj *common;
 231         unsigned long flags;
 232
 233         common = &ch->common[VPIF_VIDEO_INDEX];
 234
 235         spin_lock_irqsave(&common->irqlock, flags);
 236         if (vb->state == VB2_BUF_STATE_ACTIVE)
 237                 list_del_init(&buf->list);
 238         spin_unlock_irqrestore(&common->irqlock, flags);
 239
 240 }
 241
 242 static void vpif_wait_prepare(struct vb2_queue *vq)
 243 {
 244         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 245         struct channel_obj *ch = fh->channel;
 246         struct common_obj *common;
 247
 248         common = &ch->common[VPIF_VIDEO_INDEX];
 249         mutex_unlock(&common->lock);
 250 }
 251
 252 static void vpif_wait_finish(struct vb2_queue *vq)
 253 {
 254         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 255         struct channel_obj *ch = fh->channel;
 256         struct common_obj *common;
 257
 258         common = &ch->common[VPIF_VIDEO_INDEX];
 259         mutex_lock(&common->lock);
 260 }
 261
 262 static int vpif_buffer_init(struct vb2_buffer *vb)
 263 {
 264         struct vpif_cap_buffer *buf = container_of(vb,
 265                                         struct vpif_cap_buffer, vb);
 266
 267         INIT_LIST_HEAD(&buf->list);
 268
 269         return 0;
 270 }
 271
 272 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
 273         { {1, 1} };
 274
 275 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 276 {
 277         struct vpif_capture_config *vpif_config_data =
 278                                         vpif_dev->platform_data;
 279         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 280         struct channel_obj *ch = fh->channel;
 281         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 282         struct vpif_params *vpif = &ch->vpifparams;
 283         unsigned long addr = 0;
 284         unsigned long flags;
 285         int ret;
 286
 287         /* If buffer queue is empty, return error */
 288         spin_lock_irqsave(&common->irqlock, flags);
 289         if (list_empty(&common->dma_queue)) {
 290                 spin_unlock_irqrestore(&common->irqlock, flags);
 291                 vpif_dbg(1, debug, "buffer queue is empty\n");
 292                 return -EIO;
 293         }
 294
 295         /* Get the next frame from the buffer queue */
 296         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
 297                                     struct vpif_cap_buffer, list);
 298         /* Remove buffer from the buffer queue */
 299         list_del(&common->cur_frm->list);
 300         spin_unlock_irqrestore(&common->irqlock, flags);
 301         /* Mark state of the current frame to active */
 302         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 303         /* Initialize field_id and started member */
 304         ch->field_id = 0;
 305         common->started = 1;
 306         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 307
 308         /* Calculate the offset for Y and C data in the buffer */
 309         vpif_calculate_offsets(ch);
 310
 311         if ((vpif->std_info.frm_fmt &&
 312             ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
 313              (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
 314             (!vpif->std_info.frm_fmt &&
 315              (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
 316                 vpif_dbg(1, debug, "conflict in field format and std format\n");
 317                 return -EINVAL;
 318         }
 319
 320         /* configure 1 or 2 channel mode */
 321         if (vpif_config_data->setup_input_channel_mode) {
 322                 ret = vpif_config_data->
 323                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
 324                 if (ret < 0) {
 325                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
 326                         return ret;
 327                 }
 328         }
 329
 330         /* Call vpif_set_params function to set the parameters and addresses */
 331         ret = vpif_set_video_params(vpif, ch->channel_id);
 332
 333         if (ret < 0) {
 334                 vpif_dbg(1, debug, "can't set video params\n");
 335                 return ret;
 336         }
 337
 338         common->started = ret;
 339         vpif_config_addr(ch, ret);
 340
 341         common->set_addr(addr + common->ytop_off,
 342                          addr + common->ybtm_off,
 343                          addr + common->ctop_off,
 344                          addr + common->cbtm_off);
 345
 346         /**
 347          * Set interrupt for both the fields in VPIF Register enable channel in
 348          * VPIF register
 349          */
 350         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 351         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
 352                 channel0_intr_assert();
 353                 channel0_intr_enable(1);
 354                 enable_channel0(1);
 355         }
 356         if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
 357             (common->started == 2)) {
 358                 channel1_intr_assert();
 359                 channel1_intr_enable(1);
 360                 enable_channel1(1);
 361         }
 362
 363         return 0;
 364 }
 365
 366 /* abort streaming and wait for last buffer */
 367 static int vpif_stop_streaming(struct vb2_queue *vq)
 368 {
 369         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 370         struct channel_obj *ch = fh->channel;
 371         struct common_obj *common;
 372         unsigned long flags;
 373
 374         if (!vb2_is_streaming(vq))
 375                 return 0;
 376
 377         common = &ch->common[VPIF_VIDEO_INDEX];
 378
 379         /* release all active buffers */
 380         spin_lock_irqsave(&common->irqlock, flags);
 381         while (!list_empty(&common->dma_queue)) {
 382                 common->next_frm = list_entry(common->dma_queue.next,
 383                                                 struct vpif_cap_buffer, list);
 384                 list_del(&common->next_frm->list);
 385                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 386         }
 387         spin_unlock_irqrestore(&common->irqlock, flags);
 388
 389         return 0;
 390 }
 391
 392 static struct vb2_ops video_qops = {
 393         .queue_setup            = vpif_buffer_queue_setup,
 394         .wait_prepare           = vpif_wait_prepare,
 395         .wait_finish            = vpif_wait_finish,
 396         .buf_init               = vpif_buffer_init,
 397         .buf_prepare            = vpif_buffer_prepare,
 398         .start_streaming        = vpif_start_streaming,
 399         .stop_streaming         = vpif_stop_streaming,
 400         .buf_cleanup            = vpif_buf_cleanup,
 401         .buf_queue              = vpif_buffer_queue,
 402 };
 403
 404 /**
 405  * vpif_process_buffer_complete: process a completed buffer
 406  * @common: ptr to common channel object
 407  *
 408  * This function time stamp the buffer and mark it as DONE. It also
 409  * wake up any process waiting on the QUEUE and set the next buffer
 410  * as current
 411  */
 412 static void vpif_process_buffer_complete(struct common_obj *common)
 413 {
 414         v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 415         vb2_buffer_done(&common->cur_frm->vb,
 416                                             VB2_BUF_STATE_DONE);
 417         /* Make curFrm pointing to nextFrm */
 418         common->cur_frm = common->next_frm;
 419 }
 420
 421 /**
 422  * vpif_schedule_next_buffer: set next buffer address for capture
 423  * @common : ptr to common channel object
 424  *
 425  * This function will get next buffer from the dma queue and
 426  * set the buffer address in the vpif register for capture.
 427  * the buffer is marked active
 428  */
 429 static void vpif_schedule_next_buffer(struct common_obj *common)
 430 {
 431         unsigned long addr = 0;
 432
 433         spin_lock(&common->irqlock);
 434         common->next_frm = list_entry(common->dma_queue.next,
 435                                      struct vpif_cap_buffer, list);
 436         /* Remove that buffer from the buffer queue */
 437         list_del(&common->next_frm->list);
 438         spin_unlock(&common->irqlock);
 439         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 440         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 441
 442         /* Set top and bottom field addresses in VPIF registers */
 443         common->set_addr(addr + common->ytop_off,
 444                          addr + common->ybtm_off,
 445                          addr + common->ctop_off,
 446                          addr + common->cbtm_off);
 447 }
 448
 449 /**
 450  * vpif_channel_isr : ISR handler for vpif capture
 451  * @irq: irq number
 452  * @dev_id: dev_id ptr
 453  *
 454  * It changes status of the captured buffer, takes next buffer from the queue
 455  * and sets its address in VPIF registers
 456  */
 457 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 458 {
 459         struct vpif_device *dev = &vpif_obj;
 460         struct common_obj *common;
 461         struct channel_obj *ch;
 462         enum v4l2_field field;
 463         int channel_id = 0;
 464         int fid = -1, i;
 465
 466         channel_id = *(int *)(dev_id);
 467         if (!vpif_intr_status(channel_id))
 468                 return IRQ_NONE;
 469
 470         ch = dev->dev[channel_id];
 471
 472         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 473
 474         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
 475                 common = &ch->common[i];
 476                 /* skip If streaming is not started in this channel */
 477                 if (0 == common->started)
 478                         continue;
 479
 480                 /* Check the field format */
 481                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 482                         /* Progressive mode */
 483                         spin_lock(&common->irqlock);
 484                         if (list_empty(&common->dma_queue)) {
 485                                 spin_unlock(&common->irqlock);
 486                                 continue;
 487                         }
 488                         spin_unlock(&common->irqlock);
 489
 490                         if (!channel_first_int[i][channel_id])
 491                                 vpif_process_buffer_complete(common);
 492
 493                         channel_first_int[i][channel_id] = 0;
 494
 495                         vpif_schedule_next_buffer(common);
 496
 497
 498                         channel_first_int[i][channel_id] = 0;
 499                 } else {
 500                         /**
 501                          * Interlaced mode. If it is first interrupt, ignore
 502                          * it
 503                          */
 504                         if (channel_first_int[i][channel_id]) {
 505                                 channel_first_int[i][channel_id] = 0;
 506                                 continue;
 507                         }
 508                         if (0 == i) {
 509                                 ch->field_id ^= 1;
 510                                 /* Get field id from VPIF registers */
 511                                 fid = vpif_channel_getfid(ch->channel_id);
 512                                 if (fid != ch->field_id) {
 513                                         /**
 514                                          * If field id does not match stored
 515                                          * field id, make them in sync
 516                                          */
 517                                         if (0 == fid)
 518                                                 ch->field_id = fid;
 519                                         return IRQ_HANDLED;
 520                                 }
 521                         }
 522                         /* device field id and local field id are in sync */
 523                         if (0 == fid) {
 524                                 /* this is even field */
 525                                 if (common->cur_frm == common->next_frm)
 526                                         continue;
 527
 528                                 /* mark the current buffer as done */
 529                                 vpif_process_buffer_complete(common);
 530                         } else if (1 == fid) {
 531                                 /* odd field */
 532                                 spin_lock(&common->irqlock);
 533                                 if (list_empty(&common->dma_queue) ||
 534                                     (common->cur_frm != common->next_frm)) {
 535                                         spin_unlock(&common->irqlock);
 536                                         continue;
 537                                 }
 538                                 spin_unlock(&common->irqlock);
 539
 540                                 vpif_schedule_next_buffer(common);
 541                         }
 542                 }
 543         }
 544         return IRQ_HANDLED;
 545 }
 546
 547 /**
 548  * vpif_update_std_info() - update standard related info
 549  * @ch: ptr to channel object
 550  *
 551  * For a given standard selected by application, update values
 552  * in the device data structures
 553  */
 554 static int vpif_update_std_info(struct channel_obj *ch)
 555 {
 556         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 557         struct vpif_params *vpifparams = &ch->vpifparams;
 558         const struct vpif_channel_config_params *config;
 559         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 560         struct video_obj *vid_ch = &ch->video;
 561         int index;
 562
 563         vpif_dbg(2, debug, "vpif_update_std_info\n");
 564
 565         for (index = 0; index < vpif_ch_params_count; index++) {
 566                 config = &ch_params[index];
 567                 if (config->hd_sd == 0) {
 568                         vpif_dbg(2, debug, "SD format\n");
 569                         if (config->stdid & vid_ch->stdid) {
 570                                 memcpy(std_info, config, sizeof(*config));
 571                                 break;
 572                         }
 573                 } else {
 574                         vpif_dbg(2, debug, "HD format\n");
 575                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
 576                                 sizeof(vid_ch->dv_timings))) {
 577                                 memcpy(std_info, config, sizeof(*config));
 578                                 break;
 579                         }
 580                 }
 581         }
 582
 583         /* standard not found */
 584         if (index == vpif_ch_params_count)
 585                 return -EINVAL;
 586
 587         common->fmt.fmt.pix.width = std_info->width;
 588         common->width = std_info->width;
 589         common->fmt.fmt.pix.height = std_info->height;
 590         common->height = std_info->height;
 591         common->fmt.fmt.pix.bytesperline = std_info->width;
 592         vpifparams->video_params.hpitch = std_info->width;
 593         vpifparams->video_params.storage_mode = std_info->frm_fmt;
 594
 595         return 0;
 596 }
 597
 598 /**
 599  * vpif_calculate_offsets : This function calculates buffers offsets
 600  * @ch : ptr to channel object
 601  *
 602  * This function calculates buffer offsets for Y and C in the top and
 603  * bottom field
 604  */
 605 static void vpif_calculate_offsets(struct channel_obj *ch)
 606 {
 607         unsigned int hpitch, vpitch, sizeimage;
 608         struct video_obj *vid_ch = &(ch->video);
 609         struct vpif_params *vpifparams = &ch->vpifparams;
 610         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 611         enum v4l2_field field = common->fmt.fmt.pix.field;
 612
 613         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
 614
 615         if (V4L2_FIELD_ANY == field) {
 616                 if (vpifparams->std_info.frm_fmt)
 617                         vid_ch->buf_field = V4L2_FIELD_NONE;
 618                 else
 619                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 620         } else
 621                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 622
 623         sizeimage = common->fmt.fmt.pix.sizeimage;
 624
 625         hpitch = common->fmt.fmt.pix.bytesperline;
 626         vpitch = sizeimage / (hpitch * 2);
 627
 628         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 629             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 630                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 631                 common->ytop_off = 0;
 632                 common->ybtm_off = hpitch;
 633                 common->ctop_off = sizeimage / 2;
 634                 common->cbtm_off = sizeimage / 2 + hpitch;
 635         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 636                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 637                 common->ytop_off = 0;
 638                 common->ybtm_off = sizeimage / 4;
 639                 common->ctop_off = sizeimage / 2;
 640                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 641         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 642                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 643                 common->ybtm_off = 0;
 644                 common->ytop_off = sizeimage / 4;
 645                 common->cbtm_off = sizeimage / 2;
 646                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 647         }
 648         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 649             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
 650                 vpifparams->video_params.storage_mode = 1;
 651         else
 652                 vpifparams->video_params.storage_mode = 0;
 653
 654         if (1 == vpifparams->std_info.frm_fmt)
 655                 vpifparams->video_params.hpitch =
 656                     common->fmt.fmt.pix.bytesperline;
 657         else {
 658                 if ((field == V4L2_FIELD_ANY)
 659                     || (field == V4L2_FIELD_INTERLACED))
 660                         vpifparams->video_params.hpitch =
 661                             common->fmt.fmt.pix.bytesperline * 2;
 662                 else
 663                         vpifparams->video_params.hpitch =
 664                             common->fmt.fmt.pix.bytesperline;
 665         }
 666
 667         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
 668 }
 669
 670 /**
 671  * vpif_config_format: configure default frame format in the device
 672  * ch : ptr to channel object
 673  */
 674 static void vpif_config_format(struct channel_obj *ch)
 675 {
 676         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 677
 678         vpif_dbg(2, debug, "vpif_config_format\n");
 679
 680         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 681         if (config_params.numbuffers[ch->channel_id] == 0)
 682                 common->memory = V4L2_MEMORY_USERPTR;
 683         else
 684                 common->memory = V4L2_MEMORY_MMAP;
 685
 686         common->fmt.fmt.pix.sizeimage
 687             = config_params.channel_bufsize[ch->channel_id];
 688
 689         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 690                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 691         else
 692                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 693         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 694 }
 695
 696 /**
 697  * vpif_get_default_field() - Get default field type based on interface
 698  * @vpif_params - ptr to vpif params
 699  */
 700 static inline enum v4l2_field vpif_get_default_field(
 701                                 struct vpif_interface *iface)
 702 {
 703         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
 704                                                 V4L2_FIELD_INTERLACED;
 705 }
 706
 707 /**
 708  * vpif_check_format()  - check given pixel format for compatibility
 709  * @ch - channel  ptr
 710  * @pixfmt - Given pixel format
 711  * @update - update the values as per hardware requirement
 712  *
 713  * Check the application pixel format for S_FMT and update the input
 714  * values as per hardware limits for TRY_FMT. The default pixel and
 715  * field format is selected based on interface type.
 716  */
 717 static int vpif_check_format(struct channel_obj *ch,
 718                              struct v4l2_pix_format *pixfmt,
 719                              int update)
 720 {
 721         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 722         struct vpif_params *vpif_params = &ch->vpifparams;
 723         enum v4l2_field field = pixfmt->field;
 724         u32 sizeimage, hpitch, vpitch;
 725         int ret = -EINVAL;
 726
 727         vpif_dbg(2, debug, "vpif_check_format\n");
 728         /**
 729          * first check for the pixel format. If if_type is Raw bayer,
 730          * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
 731          * V4L2_PIX_FMT_YUV422P is supported
 732          */
 733         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
 734                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
 735                         if (!update) {
 736                                 vpif_dbg(2, debug, "invalid pix format\n");
 737                                 goto exit;
 738                         }
 739                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 740                 }
 741         } else {
 742                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
 743                         if (!update) {
 744                                 vpif_dbg(2, debug, "invalid pixel format\n");
 745                                 goto exit;
 746                         }
 747                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 748                 }
 749         }
 750
 751         if (!(VPIF_VALID_FIELD(field))) {
 752                 if (!update) {
 753                         vpif_dbg(2, debug, "invalid field format\n");
 754                         goto exit;
 755                 }
 756                 /**
 757                  * By default use FIELD_NONE for RAW Bayer capture
 758                  * and FIELD_INTERLACED for other interfaces
 759                  */
 760                 field = vpif_get_default_field(&vpif_params->iface);
 761         } else if (field == V4L2_FIELD_ANY)
 762                 /* unsupported field. Use default */
 763                 field = vpif_get_default_field(&vpif_params->iface);
 764
 765         /* validate the hpitch */
 766         hpitch = pixfmt->bytesperline;
 767         if (hpitch < vpif_params->std_info.width) {
 768                 if (!update) {
 769                         vpif_dbg(2, debug, "invalid hpitch\n");
 770                         goto exit;
 771                 }
 772                 hpitch = vpif_params->std_info.width;
 773         }
 774
 775         sizeimage = pixfmt->sizeimage;
 776
 777         vpitch = sizeimage / (hpitch * 2);
 778
 779         /* validate the vpitch */
 780         if (vpitch < vpif_params->std_info.height) {
 781                 if (!update) {
 782                         vpif_dbg(2, debug, "Invalid vpitch\n");
 783                         goto exit;
 784                 }
 785                 vpitch = vpif_params->std_info.height;
 786         }
 787
 788         /* Check for 8 byte alignment */
 789         if (!ALIGN(hpitch, 8)) {
 790                 if (!update) {
 791                         vpif_dbg(2, debug, "invalid pitch alignment\n");
 792                         goto exit;
 793                 }
 794                 /* adjust to next 8 byte boundary */
 795                 hpitch = (((hpitch + 7) / 8) * 8);
 796         }
 797         /* if update is set, modify the bytesperline and sizeimage */
 798         if (update) {
 799                 pixfmt->bytesperline = hpitch;
 800                 pixfmt->sizeimage = hpitch * vpitch * 2;
 801         }
 802         /**
 803          * Image width and height is always based on current standard width and
 804          * height
 805          */
 806         pixfmt->width = common->fmt.fmt.pix.width;
 807         pixfmt->height = common->fmt.fmt.pix.height;
 808         return 0;
 809 exit:
 810         return ret;
 811 }
 812
 813 /**
 814  * vpif_config_addr() - function to configure buffer address in vpif
 815  * @ch - channel ptr
 816  * @muxmode - channel mux mode
 817  */
 818 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 819 {
 820         struct common_obj *common;
 821
 822         vpif_dbg(2, debug, "vpif_config_addr\n");
 823
 824         common = &(ch->common[VPIF_VIDEO_INDEX]);
 825
 826         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
 827                 common->set_addr = ch1_set_videobuf_addr;
 828         else if (2 == muxmode)
 829                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
 830         else
 831                 common->set_addr = ch0_set_videobuf_addr;
 832 }
 833
 834 /**
 835  * vpif_mmap : It is used to map kernel space buffers into user spaces
 836  * @filep: file pointer
 837  * @vma: ptr to vm_area_struct
 838  */
 839 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 840 {
 841         /* Get the channel object and file handle object */
 842         struct vpif_fh *fh = filep->private_data;
 843         struct channel_obj *ch = fh->channel;
 844         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 845         int ret;
 846
 847         vpif_dbg(2, debug, "vpif_mmap\n");
 848
 849         if (mutex_lock_interruptible(&common->lock))
 850                 return -ERESTARTSYS;
 851         ret = vb2_mmap(&common->buffer_queue, vma);
 852         mutex_unlock(&common->lock);
 853         return ret;
 854 }
 855
 856 /**
 857  * vpif_poll: It is used for select/poll system call
 858  * @filep: file pointer
 859  * @wait: poll table to wait
 860  */
 861 static unsigned int vpif_poll(struct file *filep, poll_table * wait)
 862 {
 863         struct vpif_fh *fh = filep->private_data;
 864         struct channel_obj *channel = fh->channel;
 865         struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
 866         unsigned int res = 0;
 867
 868         vpif_dbg(2, debug, "vpif_poll\n");
 869
 870         if (common->started) {
 871                 mutex_lock(&common->lock);
 872                 res = vb2_poll(&common->buffer_queue, filep, wait);
 873                 mutex_unlock(&common->lock);
 874         }
 875         return res;
 876 }
 877
 878 /**
 879  * vpif_open : vpif open handler
 880  * @filep: file ptr
 881  *
 882  * It creates object of file handle structure and stores it in private_data
 883  * member of filepointer
 884  */
 885 static int vpif_open(struct file *filep)
 886 {
 887         struct video_device *vdev = video_devdata(filep);
 888         struct common_obj *common;
 889         struct video_obj *vid_ch;
 890         struct channel_obj *ch;
 891         struct vpif_fh *fh;
 892
 893         vpif_dbg(2, debug, "vpif_open\n");
 894
 895         ch = video_get_drvdata(vdev);
 896
 897         vid_ch = &ch->video;
 898         common = &ch->common[VPIF_VIDEO_INDEX];
 899
 900         /* Allocate memory for the file handle object */
 901         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 902         if (NULL == fh) {
 903                 vpif_err("unable to allocate memory for file handle object\n");
 904                 return -ENOMEM;
 905         }
 906
 907         if (mutex_lock_interruptible(&common->lock)) {
 908                 kfree(fh);
 909                 return -ERESTARTSYS;
 910         }
 911         /* store pointer to fh in private_data member of filep */
 912         filep->private_data = fh;
 913         fh->channel = ch;
 914         fh->initialized = 0;
 915         /* If decoder is not initialized. initialize it */
 916         if (!ch->initialized) {
 917                 fh->initialized = 1;
 918                 ch->initialized = 1;
 919                 memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
 920         }
 921         /* Increment channel usrs counter */
 922         ch->usrs++;
 923         /* Set io_allowed member to false */
 924         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 925         /* Initialize priority of this instance to default priority */
 926         fh->prio = V4L2_PRIORITY_UNSET;
 927         v4l2_prio_open(&ch->prio, &fh->prio);
 928         mutex_unlock(&common->lock);
 929         return 0;
 930 }
 931
 932 /**
 933  * vpif_release : function to clean up file close
 934  * @filep: file pointer
 935  *
 936  * This function deletes buffer queue, frees the buffers and the vpif file
 937  * handle
 938  */
 939 static int vpif_release(struct file *filep)
 940 {
 941         struct vpif_fh *fh = filep->private_data;
 942         struct channel_obj *ch = fh->channel;
 943         struct common_obj *common;
 944
 945         vpif_dbg(2, debug, "vpif_release\n");
 946
 947         common = &ch->common[VPIF_VIDEO_INDEX];
 948
 949         mutex_lock(&common->lock);
 950         /* if this instance is doing IO */
 951         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 952                 /* Reset io_usrs member of channel object */
 953                 common->io_usrs = 0;
 954                 /* Disable channel as per its device type and channel id */
 955                 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 956                         enable_channel0(0);
 957                         channel0_intr_enable(0);
 958                 }
 959                 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
 960                     (2 == common->started)) {
 961                         enable_channel1(0);
 962                         channel1_intr_enable(0);
 963                 }
 964                 common->started = 0;
 965                 /* Free buffers allocated */
 966                 vb2_queue_release(&common->buffer_queue);
 967                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 968         }
 969
 970         /* Decrement channel usrs counter */
 971         ch->usrs--;
 972
 973         /* Close the priority */
 974         v4l2_prio_close(&ch->prio, fh->prio);
 975
 976         if (fh->initialized)
 977                 ch->initialized = 0;
 978
 979         mutex_unlock(&common->lock);
 980         filep->private_data = NULL;
 981         kfree(fh);
 982         return 0;
 983 }
 984
 985 /**
 986  * vpif_reqbufs() - request buffer handler
 987  * @file: file ptr
 988  * @priv: file handle
 989  * @reqbuf: request buffer structure ptr
 990  */
 991 static int vpif_reqbufs(struct file *file, void *priv,
 992                         struct v4l2_requestbuffers *reqbuf)
 993 {
 994         struct vpif_fh *fh = priv;
 995         struct channel_obj *ch = fh->channel;
 996         struct common_obj *common;
 997         u8 index = 0;
 998         struct vb2_queue *q;
 999         int ret;
1000
1001         vpif_dbg(2, debug, "vpif_reqbufs\n");
1002
1003         /**
1004          * This file handle has not initialized the channel,
1005          * It is not allowed to do settings
1006          */
1007         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
1008             || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1009                 if (!fh->initialized) {
1010                         vpif_dbg(1, debug, "Channel Busy\n");
1011                         return -EBUSY;
1012                 }
1013         }
1014
1015         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type || !vpif_dev)
1016                 return -EINVAL;
1017
1018         index = VPIF_VIDEO_INDEX;
1019
1020         common = &ch->common[index];
1021
1022         if (0 != common->io_usrs)
1023                 return -EBUSY;
1024
1025         /* Initialize videobuf2 queue as per the buffer type */
1026         common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1027         if (IS_ERR(common->alloc_ctx)) {
1028                 vpif_err("Failed to get the context\n");
1029                 return PTR_ERR(common->alloc_ctx);
1030         }
1031         q = &common->buffer_queue;
1032         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1033         q->io_modes = VB2_MMAP | VB2_USERPTR;
1034         q->drv_priv = fh;
1035         q->ops = &video_qops;
1036         q->mem_ops = &vb2_dma_contig_memops;
1037         q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1038
1039         ret = vb2_queue_init(q);
1040         if (ret) {
1041                 vpif_err("vpif_capture: vb2_queue_init() failed\n");
1042                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1043                 return ret;
1044         }
1045         /* Set io allowed member of file handle to TRUE */
1046         fh->io_allowed[index] = 1;
1047         /* Increment io usrs member of channel object to 1 */
1048         common->io_usrs = 1;
1049         /* Store type of memory requested in channel object */
1050         common->memory = reqbuf->memory;
1051         INIT_LIST_HEAD(&common->dma_queue);
1052
1053         /* Allocate buffers */
1054         return vb2_reqbufs(&common->buffer_queue, reqbuf);
1055 }
1056
1057 /**
1058  * vpif_querybuf() - query buffer handler
1059  * @file: file ptr
1060  * @priv: file handle
1061  * @buf: v4l2 buffer structure ptr
1062  */
1063 static int vpif_querybuf(struct file *file, void *priv,
1064                                 struct v4l2_buffer *buf)
1065 {
1066         struct vpif_fh *fh = priv;
1067         struct channel_obj *ch = fh->channel;
1068         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1069
1070         vpif_dbg(2, debug, "vpif_querybuf\n");
1071
1072         if (common->fmt.type != buf->type)
1073                 return -EINVAL;
1074
1075         if (common->memory != V4L2_MEMORY_MMAP) {
1076                 vpif_dbg(1, debug, "Invalid memory\n");
1077                 return -EINVAL;
1078         }
1079
1080         return vb2_querybuf(&common->buffer_queue, buf);
1081 }
1082
1083 /**
1084  * vpif_qbuf() - query buffer handler
1085  * @file: file ptr
1086  * @priv: file handle
1087  * @buf: v4l2 buffer structure ptr
1088  */
1089 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1090 {
1091
1092         struct vpif_fh *fh = priv;
1093         struct channel_obj *ch = fh->channel;
1094         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1095         struct v4l2_buffer tbuf = *buf;
1096
1097         vpif_dbg(2, debug, "vpif_qbuf\n");
1098
1099         if (common->fmt.type != tbuf.type) {
1100                 vpif_err("invalid buffer type\n");
1101                 return -EINVAL;
1102         }
1103
1104         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1105                 vpif_err("fh io not allowed\n");
1106                 return -EACCES;
1107         }
1108
1109         return vb2_qbuf(&common->buffer_queue, buf);
1110 }
1111
1112 /**
1113  * vpif_dqbuf() - query buffer handler
1114  * @file: file ptr
1115  * @priv: file handle
1116  * @buf: v4l2 buffer structure ptr
1117  */
1118 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1119 {
1120         struct vpif_fh *fh = priv;
1121         struct channel_obj *ch = fh->channel;
1122         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1123
1124         vpif_dbg(2, debug, "vpif_dqbuf\n");
1125
1126         return vb2_dqbuf(&common->buffer_queue, buf,
1127                          (file->f_flags & O_NONBLOCK));
1128 }
1129
1130 /**
1131  * vpif_streamon() - streamon handler
1132  * @file: file ptr
1133  * @priv: file handle
1134  * @buftype: v4l2 buffer type
1135  */
1136 static int vpif_streamon(struct file *file, void *priv,
1137                                 enum v4l2_buf_type buftype)
1138 {
1139
1140         struct vpif_fh *fh = priv;
1141         struct channel_obj *ch = fh->channel;
1142         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1143         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1144         struct vpif_params *vpif;
1145         int ret = 0;
1146
1147         vpif_dbg(2, debug, "vpif_streamon\n");
1148
1149         vpif = &ch->vpifparams;
1150
1151         if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1152                 vpif_dbg(1, debug, "buffer type not supported\n");
1153                 return -EINVAL;
1154         }
1155
1156         /* If file handle is not allowed IO, return error */
1157         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1158                 vpif_dbg(1, debug, "io not allowed\n");
1159                 return -EACCES;
1160         }
1161
1162         /* If Streaming is already started, return error */
1163         if (common->started) {
1164                 vpif_dbg(1, debug, "channel->started\n");
1165                 return -EBUSY;
1166         }
1167
1168         if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
1169             oth_ch->common[VPIF_VIDEO_INDEX].started &&
1170             vpif->std_info.ycmux_mode == 0) ||
1171            ((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
1172             (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1173                 vpif_dbg(1, debug, "other channel is being used\n");
1174                 return -EBUSY;
1175         }
1176
1177         ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
1178         if (ret)
1179                 return ret;
1180
1181         /* Enable streamon on the sub device */
1182         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
1183
1184         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1185                 vpif_dbg(1, debug, "stream on failed in subdev\n");
1186                 return ret;
1187         }
1188
1189         /* Call vb2_streamon to start streaming in videobuf2 */
1190         ret = vb2_streamon(&common->buffer_queue, buftype);
1191         if (ret) {
1192                 vpif_dbg(1, debug, "vb2_streamon\n");
1193                 return ret;
1194         }
1195
1196         return ret;
1197 }
1198
1199 /**
1200  * vpif_streamoff() - streamoff handler
1201  * @file: file ptr
1202  * @priv: file handle
1203  * @buftype: v4l2 buffer type
1204  */
1205 static int vpif_streamoff(struct file *file, void *priv,
1206                                 enum v4l2_buf_type buftype)
1207 {
1208
1209         struct vpif_fh *fh = priv;
1210         struct channel_obj *ch = fh->channel;
1211         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1212         int ret;
1213
1214         vpif_dbg(2, debug, "vpif_streamoff\n");
1215
1216         if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1217                 vpif_dbg(1, debug, "buffer type not supported\n");
1218                 return -EINVAL;
1219         }
1220
1221         /* If io is allowed for this file handle, return error */
1222         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1223                 vpif_dbg(1, debug, "io not allowed\n");
1224                 return -EACCES;
1225         }
1226
1227         /* If streaming is not started, return error */
1228         if (!common->started) {
1229                 vpif_dbg(1, debug, "channel->started\n");
1230                 return -EINVAL;
1231         }
1232
1233         /* disable channel */
1234         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
1235                 enable_channel0(0);
1236                 channel0_intr_enable(0);
1237         } else {
1238                 enable_channel1(0);
1239                 channel1_intr_enable(0);
1240         }
1241
1242         common->started = 0;
1243
1244         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
1245
1246         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
1247                 vpif_dbg(1, debug, "stream off failed in subdev\n");
1248
1249         return vb2_streamoff(&common->buffer_queue, buftype);
1250 }
1251
1252 /**
1253  * vpif_input_to_subdev() - Maps input to sub device
1254  * @vpif_cfg - global config ptr
1255  * @chan_cfg - channel config ptr
1256  * @input_index - Given input index from application
1257  *
1258  * lookup the sub device information for a given input index.
1259  * we report all the inputs to application. inputs table also
1260  * has sub device name for the each input
1261  */
1262 static int vpif_input_to_subdev(
1263                 struct vpif_capture_config *vpif_cfg,
1264                 struct vpif_capture_chan_config *chan_cfg,
1265                 int input_index)
1266 {
1267         struct vpif_subdev_info *subdev_info;
1268         const char *subdev_name;
1269         int i;
1270
1271         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
1272
1273         subdev_name = chan_cfg->inputs[input_index].subdev_name;
1274         if (subdev_name == NULL)
1275                 return -1;
1276
1277         /* loop through the sub device list to get the sub device info */
1278         for (i = 0; i < vpif_cfg->subdev_count; i++) {
1279                 subdev_info = &vpif_cfg->subdev_info[i];
1280                 if (!strcmp(subdev_info->name, subdev_name))
1281                         return i;
1282         }
1283         return -1;
1284 }
1285
1286 /**
1287  * vpif_set_input() - Select an input
1288  * @vpif_cfg - global config ptr
1289  * @ch - channel
1290  * @_index - Given input index from application
1291  *
1292  * Select the given input.
1293  */
1294 static int vpif_set_input(
1295                 struct vpif_capture_config *vpif_cfg,
1296                 struct channel_obj *ch,
1297                 int index)
1298 {
1299         struct vpif_capture_chan_config *chan_cfg =
1300                         &vpif_cfg->chan_config[ch->channel_id];
1301         struct vpif_subdev_info *subdev_info = NULL;
1302         struct v4l2_subdev *sd = NULL;
1303         u32 input = 0, output = 0;
1304         int sd_index;
1305         int ret;
1306
1307         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
1308         if (sd_index >= 0) {
1309                 sd = vpif_obj.sd[sd_index];
1310                 subdev_info = &vpif_cfg->subdev_info[sd_index];
1311         }
1312
1313         /* first setup input path from sub device to vpif */
1314         if (sd && vpif_cfg->setup_input_path) {
1315                 ret = vpif_cfg->setup_input_path(ch->channel_id,
1316                                        subdev_info->name);
1317                 if (ret < 0) {
1318                         vpif_dbg(1, debug, "couldn't setup input path for the" \
1319                         " sub device %s, for input index %d\n",
1320                         subdev_info->name, index);
1321                         return ret;
1322                 }
1323         }
1324
1325         if (sd) {
1326                 input = chan_cfg->inputs[index].input_route;
1327                 output = chan_cfg->inputs[index].output_route;
1328                 ret = v4l2_subdev_call(sd, video, s_routing,
1329                                 input, output, 0);
1330                 if (ret < 0 && ret != -ENOIOCTLCMD) {
1331                         vpif_dbg(1, debug, "Failed to set input\n");
1332                         return ret;
1333                 }
1334         }
1335         ch->input_idx = index;
1336         ch->sd = sd;
1337         /* copy interface parameters to vpif */
1338         ch->vpifparams.iface = chan_cfg->vpif_if;
1339
1340         /* update tvnorms from the sub device input info */
1341         ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
1342         return 0;
1343 }
1344
1345 /**
1346  * vpif_querystd() - querystd handler
1347  * @file: file ptr
1348  * @priv: file handle
1349  * @std_id: ptr to std id
1350  *
1351  * This function is called to detect standard at the selected input
1352  */
1353 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1354 {
1355         struct vpif_fh *fh = priv;
1356         struct channel_obj *ch = fh->channel;
1357         int ret = 0;
1358
1359         vpif_dbg(2, debug, "vpif_querystd\n");
1360
1361         /* Call querystd function of decoder device */
1362         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
1363
1364         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1365                 return -ENODATA;
1366         if (ret) {
1367                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
1368                 return ret;
1369         }
1370
1371         return 0;
1372 }
1373
1374 /**
1375  * vpif_g_std() - get STD handler
1376  * @file: file ptr
1377  * @priv: file handle
1378  * @std_id: ptr to std id
1379  */
1380 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1381 {
1382         struct vpif_fh *fh = priv;
1383         struct channel_obj *ch = fh->channel;
1384
1385         vpif_dbg(2, debug, "vpif_g_std\n");
1386
1387         *std = ch->video.stdid;
1388         return 0;
1389 }
1390
1391 /**
1392  * vpif_s_std() - set STD handler
1393  * @file: file ptr
1394  * @priv: file handle
1395  * @std_id: ptr to std id
1396  */
1397 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1398 {
1399         struct vpif_fh *fh = priv;
1400         struct channel_obj *ch = fh->channel;
1401         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1402         int ret = 0;
1403
1404         vpif_dbg(2, debug, "vpif_s_std\n");
1405
1406         if (common->started) {
1407                 vpif_err("streaming in progress\n");
1408                 return -EBUSY;
1409         }
1410
1411         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1412             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1413                 if (!fh->initialized) {
1414                         vpif_dbg(1, debug, "Channel Busy\n");
1415                         return -EBUSY;
1416                 }
1417         }
1418
1419         ret = v4l2_prio_check(&ch->prio, fh->prio);
1420         if (0 != ret)
1421                 return ret;
1422
1423         fh->initialized = 1;
1424
1425         /* Call encoder subdevice function to set the standard */
1426         ch->video.stdid = *std_id;
1427         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1428
1429         /* Get the information about the standard */
1430         if (vpif_update_std_info(ch)) {
1431                 vpif_err("Error getting the standard info\n");
1432                 return -EINVAL;
1433         }
1434
1435         /* Configure the default format information */
1436         vpif_config_format(ch);
1437
1438         /* set standard in the sub device */
1439         ret = v4l2_subdev_call(ch->sd, core, s_std, *std_id);
1440         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1441                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1442                 return ret;
1443         }
1444         return 0;
1445 }
1446
1447 /**
1448  * vpif_enum_input() - ENUMINPUT handler
1449  * @file: file ptr
1450  * @priv: file handle
1451  * @input: ptr to input structure
1452  */
1453 static int vpif_enum_input(struct file *file, void *priv,
1454                                 struct v4l2_input *input)
1455 {
1456
1457         struct vpif_capture_config *config = vpif_dev->platform_data;
1458         struct vpif_capture_chan_config *chan_cfg;
1459         struct vpif_fh *fh = priv;
1460         struct channel_obj *ch = fh->channel;
1461
1462         chan_cfg = &config->chan_config[ch->channel_id];
1463
1464         if (input->index >= chan_cfg->input_count) {
1465                 vpif_dbg(1, debug, "Invalid input index\n");
1466                 return -EINVAL;
1467         }
1468
1469         memcpy(input, &chan_cfg->inputs[input->index].input,
1470                 sizeof(*input));
1471         return 0;
1472 }
1473
1474 /**
1475  * vpif_g_input() - Get INPUT handler
1476  * @file: file ptr
1477  * @priv: file handle
1478  * @index: ptr to input index
1479  */
1480 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
1481 {
1482         struct vpif_fh *fh = priv;
1483         struct channel_obj *ch = fh->channel;
1484
1485         *index = ch->input_idx;
1486         return 0;
1487 }
1488
1489 /**
1490  * vpif_s_input() - Set INPUT handler
1491  * @file: file ptr
1492  * @priv: file handle
1493  * @index: input index
1494  */
1495 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1496 {
1497         struct vpif_capture_config *config = vpif_dev->platform_data;
1498         struct vpif_capture_chan_config *chan_cfg;
1499         struct vpif_fh *fh = priv;
1500         struct channel_obj *ch = fh->channel;
1501         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1502         int ret;
1503
1504         chan_cfg = &config->chan_config[ch->channel_id];
1505
1506         if (index >= chan_cfg->input_count)
1507                 return -EINVAL;
1508
1509         if (common->started) {
1510                 vpif_err("Streaming in progress\n");
1511                 return -EBUSY;
1512         }
1513
1514         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1515             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1516                 if (!fh->initialized) {
1517                         vpif_dbg(1, debug, "Channel Busy\n");
1518                         return -EBUSY;
1519                 }
1520         }
1521
1522         ret = v4l2_prio_check(&ch->prio, fh->prio);
1523         if (0 != ret)
1524                 return ret;
1525
1526         fh->initialized = 1;
1527         return vpif_set_input(config, ch, index);
1528 }
1529
1530 /**
1531  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1532  * @file: file ptr
1533  * @priv: file handle
1534  * @index: input index
1535  */
1536 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
1537                                         struct v4l2_fmtdesc *fmt)
1538 {
1539         struct vpif_fh *fh = priv;
1540         struct channel_obj *ch = fh->channel;
1541
1542         if (fmt->index != 0) {
1543                 vpif_dbg(1, debug, "Invalid format index\n");
1544                 return -EINVAL;
1545         }
1546
1547         /* Fill in the information about format */
1548         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1549                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1550                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1551                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1552         } else {
1553                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1554                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1555                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1556         }
1557         return 0;
1558 }
1559
1560 /**
1561  * vpif_try_fmt_vid_cap() - TRY_FMT handler
1562  * @file: file ptr
1563  * @priv: file handle
1564  * @fmt: ptr to v4l2 format structure
1565  */
1566 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1567                                 struct v4l2_format *fmt)
1568 {
1569         struct vpif_fh *fh = priv;
1570         struct channel_obj *ch = fh->channel;
1571         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1572
1573         return vpif_check_format(ch, pixfmt, 1);
1574 }
1575
1576
1577 /**
1578  * vpif_g_fmt_vid_cap() - Set INPUT handler
1579  * @file: file ptr
1580  * @priv: file handle
1581  * @fmt: ptr to v4l2 format structure
1582  */
1583 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1584                                 struct v4l2_format *fmt)
1585 {
1586         struct vpif_fh *fh = priv;
1587         struct channel_obj *ch = fh->channel;
1588         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1589
1590         /* Check the validity of the buffer type */
1591         if (common->fmt.type != fmt->type)
1592                 return -EINVAL;
1593
1594         /* Fill in the information about format */
1595         *fmt = common->fmt;
1596         return 0;
1597 }
1598
1599 /**
1600  * vpif_s_fmt_vid_cap() - Set FMT handler
1601  * @file: file ptr
1602  * @priv: file handle
1603  * @fmt: ptr to v4l2 format structure
1604  */
1605 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1606                                 struct v4l2_format *fmt)
1607 {
1608         struct vpif_fh *fh = priv;
1609         struct channel_obj *ch = fh->channel;
1610         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1611         struct v4l2_pix_format *pixfmt;
1612         int ret = 0;
1613
1614         vpif_dbg(2, debug, "%s\n", __func__);
1615
1616         /* If streaming is started, return error */
1617         if (common->started) {
1618                 vpif_dbg(1, debug, "Streaming is started\n");
1619                 return -EBUSY;
1620         }
1621
1622         if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1623             (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1624                 if (!fh->initialized) {
1625                         vpif_dbg(1, debug, "Channel Busy\n");
1626                         return -EBUSY;
1627                 }
1628         }
1629
1630         ret = v4l2_prio_check(&ch->prio, fh->prio);
1631         if (0 != ret)
1632                 return ret;
1633
1634         fh->initialized = 1;
1635
1636         pixfmt = &fmt->fmt.pix;
1637         /* Check for valid field format */
1638         ret = vpif_check_format(ch, pixfmt, 0);
1639
1640         if (ret)
1641                 return ret;
1642         /* store the format in the channel object */
1643         common->fmt = *fmt;
1644         return 0;
1645 }
1646
1647 /**
1648  * vpif_querycap() - QUERYCAP handler
1649  * @file: file ptr
1650  * @priv: file handle
1651  * @cap: ptr to v4l2_capability structure
1652  */
1653 static int vpif_querycap(struct file *file, void  *priv,
1654                                 struct v4l2_capability *cap)
1655 {
1656         struct vpif_capture_config *config = vpif_dev->platform_data;
1657
1658         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1659         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1660         snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
1661         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1662                  dev_name(vpif_dev));
1663         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1664
1665         return 0;
1666 }
1667
1668 /**
1669  * vpif_g_priority() - get priority handler
1670  * @file: file ptr
1671  * @priv: file handle
1672  * @prio: ptr to v4l2_priority structure
1673  */
1674 static int vpif_g_priority(struct file *file, void *priv,
1675                            enum v4l2_priority *prio)
1676 {
1677         struct vpif_fh *fh = priv;
1678         struct channel_obj *ch = fh->channel;
1679
1680         *prio = v4l2_prio_max(&ch->prio);
1681
1682         return 0;
1683 }
1684
1685 /**
1686  * vpif_s_priority() - set priority handler
1687  * @file: file ptr
1688  * @priv: file handle
1689  * @prio: ptr to v4l2_priority structure
1690  */
1691 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1692 {
1693         struct vpif_fh *fh = priv;
1694         struct channel_obj *ch = fh->channel;
1695
1696         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1697 }
1698
1699 /**
1700  * vpif_cropcap() - cropcap handler
1701  * @file: file ptr
1702  * @priv: file handle
1703  * @crop: ptr to v4l2_cropcap structure
1704  */
1705 static int vpif_cropcap(struct file *file, void *priv,
1706                         struct v4l2_cropcap *crop)
1707 {
1708         struct vpif_fh *fh = priv;
1709         struct channel_obj *ch = fh->channel;
1710         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1711
1712         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
1713                 return -EINVAL;
1714
1715         crop->bounds.left = 0;
1716         crop->bounds.top = 0;
1717         crop->bounds.height = common->height;
1718         crop->bounds.width = common->width;
1719         crop->defrect = crop->bounds;
1720         return 0;
1721 }
1722
1723 /**
1724  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1725  * @file: file ptr
1726  * @priv: file handle
1727  * @timings: input timings
1728  */
1729 static int
1730 vpif_enum_dv_timings(struct file *file, void *priv,
1731                      struct v4l2_enum_dv_timings *timings)
1732 {
1733         struct vpif_fh *fh = priv;
1734         struct channel_obj *ch = fh->channel;
1735         int ret;
1736
1737         ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1738         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1739                 return -EINVAL;
1740         return ret;
1741 }
1742
1743 /**
1744  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1745  * @file: file ptr
1746  * @priv: file handle
1747  * @timings: input timings
1748  */
1749 static int
1750 vpif_query_dv_timings(struct file *file, void *priv,
1751                       struct v4l2_dv_timings *timings)
1752 {
1753         struct vpif_fh *fh = priv;
1754         struct channel_obj *ch = fh->channel;
1755         int ret;
1756
1757         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1758         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1759                 return -ENODATA;
1760         return ret;
1761 }
1762
1763 /**
1764  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1765  * @file: file ptr
1766  * @priv: file handle
1767  * @timings: digital video timings
1768  */
1769 static int vpif_s_dv_timings(struct file *file, void *priv,
1770                 struct v4l2_dv_timings *timings)
1771 {
1772         struct vpif_fh *fh = priv;
1773         struct channel_obj *ch = fh->channel;
1774         struct vpif_params *vpifparams = &ch->vpifparams;
1775         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1776         struct video_obj *vid_ch = &ch->video;
1777         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1778         int ret;
1779
1780         if (timings->type != V4L2_DV_BT_656_1120) {
1781                 vpif_dbg(2, debug, "Timing type not defined\n");
1782                 return -EINVAL;
1783         }
1784
1785         /* Configure subdevice timings, if any */
1786         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1787         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1788                 ret = 0;
1789         if (ret < 0) {
1790                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1791                 return ret;
1792         }
1793
1794         if (!(timings->bt.width && timings->bt.height &&
1795                                 (timings->bt.hbackporch ||
1796                                  timings->bt.hfrontporch ||
1797                                  timings->bt.hsync) &&
1798                                 timings->bt.vfrontporch &&
1799                                 (timings->bt.vbackporch ||
1800                                  timings->bt.vsync))) {
1801                 vpif_dbg(2, debug, "Timings for width, height, "
1802                                 "horizontal back porch, horizontal sync, "
1803                                 "horizontal front porch, vertical back porch, "
1804                                 "vertical sync and vertical back porch "
1805                                 "must be defined\n");
1806                 return -EINVAL;
1807         }
1808
1809         vid_ch->dv_timings = *timings;
1810
1811         /* Configure video port timings */
1812
1813         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1814                 bt->hsync - 8;
1815         std_info->sav2eav = bt->width;
1816
1817         std_info->l1 = 1;
1818         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1819
1820         if (bt->interlaced) {
1821                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1822                         std_info->vsize = bt->height * 2 +
1823                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1824                                 bt->il_vfrontporch + bt->il_vsync +
1825                                 bt->il_vbackporch;
1826                         std_info->l5 = std_info->vsize/2 -
1827                                 (bt->vfrontporch - 1);
1828                         std_info->l7 = std_info->vsize/2 + 1;
1829                         std_info->l9 = std_info->l7 + bt->il_vsync +
1830                                 bt->il_vbackporch + 1;
1831                         std_info->l11 = std_info->vsize -
1832                                 (bt->il_vfrontporch - 1);
1833                 } else {
1834                         vpif_dbg(2, debug, "Required timing values for "
1835                                         "interlaced BT format missing\n");
1836                         return -EINVAL;
1837                 }
1838         } else {
1839                 std_info->vsize = bt->height + bt->vfrontporch +
1840                         bt->vsync + bt->vbackporch;
1841                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1842         }
1843         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1844         std_info->width = bt->width;
1845         std_info->height = bt->height;
1846         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1847         std_info->ycmux_mode = 0;
1848         std_info->capture_format = 0;
1849         std_info->vbi_supported = 0;
1850         std_info->hd_sd = 1;
1851         std_info->stdid = 0;
1852
1853         vid_ch->stdid = 0;
1854         return 0;
1855 }
1856
1857 /**
1858  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1859  * @file: file ptr
1860  * @priv: file handle
1861  * @timings: digital video timings
1862  */
1863 static int vpif_g_dv_timings(struct file *file, void *priv,
1864                 struct v4l2_dv_timings *timings)
1865 {
1866         struct vpif_fh *fh = priv;
1867         struct channel_obj *ch = fh->channel;
1868         struct video_obj *vid_ch = &ch->video;
1869
1870         *timings = vid_ch->dv_timings;
1871
1872         return 0;
1873 }
1874
1875 /*
1876  * vpif_g_chip_ident() - Identify the chip
1877  * @file: file ptr
1878  * @priv: file handle
1879  * @chip: chip identity
1880  *
1881  * Returns zero or -EINVAL if read operations fails.
1882  */
1883 static int vpif_g_chip_ident(struct file *file, void *priv,
1884                 struct v4l2_dbg_chip_ident *chip)
1885 {
1886         chip->ident = V4L2_IDENT_NONE;
1887         chip->revision = 0;
1888         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1889                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1890                 vpif_dbg(2, debug, "match_type is invalid.\n");
1891                 return -EINVAL;
1892         }
1893
1894         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1895                         g_chip_ident, chip);
1896 }
1897
1898 #ifdef CONFIG_VIDEO_ADV_DEBUG
1899 /*
1900  * vpif_dbg_g_register() - Read register
1901  * @file: file ptr
1902  * @priv: file handle
1903  * @reg: register to be read
1904  *
1905  * Debugging only
1906  * Returns zero or -EINVAL if read operations fails.
1907  */
1908 static int vpif_dbg_g_register(struct file *file, void *priv,
1909                 struct v4l2_dbg_register *reg){
1910         struct vpif_fh *fh = priv;
1911         struct channel_obj *ch = fh->channel;
1912
1913         return v4l2_subdev_call(ch->sd, core, g_register, reg);
1914 }
1915
1916 /*
1917  * vpif_dbg_s_register() - Write to register
1918  * @file: file ptr
1919  * @priv: file handle
1920  * @reg: register to be modified
1921  *
1922  * Debugging only
1923  * Returns zero or -EINVAL if write operations fails.
1924  */
1925 static int vpif_dbg_s_register(struct file *file, void *priv,
1926                 struct v4l2_dbg_register *reg){
1927         struct vpif_fh *fh = priv;
1928         struct channel_obj *ch = fh->channel;
1929
1930         return v4l2_subdev_call(ch->sd, core, s_register, reg);
1931 }
1932 #endif
1933
1934 /*
1935  * vpif_log_status() - Status information
1936  * @file: file ptr
1937  * @priv: file handle
1938  *
1939  * Returns zero.
1940  */
1941 static int vpif_log_status(struct file *filep, void *priv)
1942 {
1943         /* status for sub devices */
1944         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1945
1946         return 0;
1947 }
1948
1949 /* vpif capture ioctl operations */
1950 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1951         .vidioc_querycap                = vpif_querycap,
1952         .vidioc_g_priority              = vpif_g_priority,
1953         .vidioc_s_priority              = vpif_s_priority,
1954         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1955         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1956         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1957         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1958         .vidioc_enum_input              = vpif_enum_input,
1959         .vidioc_s_input                 = vpif_s_input,
1960         .vidioc_g_input                 = vpif_g_input,
1961         .vidioc_reqbufs                 = vpif_reqbufs,
1962         .vidioc_querybuf                = vpif_querybuf,
1963         .vidioc_querystd                = vpif_querystd,
1964         .vidioc_s_std                   = vpif_s_std,
1965         .vidioc_g_std                   = vpif_g_std,
1966         .vidioc_qbuf                    = vpif_qbuf,
1967         .vidioc_dqbuf                   = vpif_dqbuf,
1968         .vidioc_streamon                = vpif_streamon,
1969         .vidioc_streamoff               = vpif_streamoff,
1970         .vidioc_cropcap                 = vpif_cropcap,
1971         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1972         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1973         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1974         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1975         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1976 #ifdef CONFIG_VIDEO_ADV_DEBUG
1977         .vidioc_g_register              = vpif_dbg_g_register,
1978         .vidioc_s_register              = vpif_dbg_s_register,
1979 #endif
1980         .vidioc_log_status              = vpif_log_status,
1981 };
1982
1983 /* vpif file operations */
1984 static struct v4l2_file_operations vpif_fops = {
1985         .owner = THIS_MODULE,
1986         .open = vpif_open,
1987         .release = vpif_release,
1988         .unlocked_ioctl = video_ioctl2,
1989         .mmap = vpif_mmap,
1990         .poll = vpif_poll
1991 };
1992
1993 /* vpif video template */
1994 static struct video_device vpif_video_template = {
1995         .name           = "vpif",
1996         .fops           = &vpif_fops,
1997         .minor          = -1,
1998         .ioctl_ops      = &vpif_ioctl_ops,
1999 };
2000
2001 /**
2002  * initialize_vpif() - Initialize vpif data structures
2003  *
2004  * Allocate memory for data structures and initialize them
2005  */
2006 static int initialize_vpif(void)
2007 {
2008         int err = 0, i, j;
2009         int free_channel_objects_index;
2010
2011         /* Default number of buffers should be 3 */
2012         if ((ch0_numbuffers > 0) &&
2013             (ch0_numbuffers < config_params.min_numbuffers))
2014                 ch0_numbuffers = config_params.min_numbuffers;
2015         if ((ch1_numbuffers > 0) &&
2016             (ch1_numbuffers < config_params.min_numbuffers))
2017                 ch1_numbuffers = config_params.min_numbuffers;
2018
2019         /* Set buffer size to min buffers size if it is invalid */
2020         if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
2021                 ch0_bufsize =
2022                     config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
2023         if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
2024                 ch1_bufsize =
2025                     config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
2026
2027         config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
2028         config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
2029         if (ch0_numbuffers) {
2030                 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
2031                     = ch0_bufsize;
2032         }
2033         if (ch1_numbuffers) {
2034                 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
2035                     = ch1_bufsize;
2036         }
2037
2038         /* Allocate memory for six channel objects */
2039         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2040                 vpif_obj.dev[i] =
2041                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
2042                 /* If memory allocation fails, return error */
2043                 if (!vpif_obj.dev[i]) {
2044                         free_channel_objects_index = i;
2045                         err = -ENOMEM;
2046                         goto vpif_init_free_channel_objects;
2047                 }
2048         }
2049         return 0;
2050
2051 vpif_init_free_channel_objects:
2052         for (j = 0; j < free_channel_objects_index; j++)
2053                 kfree(vpif_obj.dev[j]);
2054         return err;
2055 }
2056
2057 /**
2058  * vpif_probe : This function probes the vpif capture driver
2059  * @pdev: platform device pointer
2060  *
2061  * This creates device entries by register itself to the V4L2 driver and
2062  * initializes fields of each channel objects
2063  */
2064 static __init int vpif_probe(struct platform_device *pdev)
2065 {
2066         struct vpif_subdev_info *subdevdata;
2067         struct vpif_capture_config *config;
2068         int i, j, k, err;
2069         int res_idx = 0;
2070         struct i2c_adapter *i2c_adap;
2071         struct channel_obj *ch;
2072         struct common_obj *common;
2073         struct video_device *vfd;
2074         struct resource *res;
2075         int subdev_count;
2076         size_t size;
2077
2078         vpif_dev = &pdev->dev;
2079
2080         err = initialize_vpif();
2081         if (err) {
2082                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
2083                 return err;
2084         }
2085
2086         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
2087         if (err) {
2088                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
2089                 return err;
2090         }
2091
2092         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
2093                 for (i = res->start; i <= res->end; i++) {
2094                         if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
2095                                         "VPIF_Capture", (void *)
2096                                         (&vpif_obj.dev[res_idx]->channel_id))) {
2097                                 err = -EBUSY;
2098                                 for (j = 0; j < i; j++)
2099                                         free_irq(j, (void *)
2100                                         (&vpif_obj.dev[res_idx]->channel_id));
2101                                 goto vpif_int_err;
2102                         }
2103                 }
2104                 res_idx++;
2105         }
2106
2107         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2108                 /* Get the pointer to the channel object */
2109                 ch = vpif_obj.dev[i];
2110                 /* Allocate memory for video device */
2111                 vfd = video_device_alloc();
2112                 if (NULL == vfd) {
2113                         for (j = 0; j < i; j++) {
2114                                 ch = vpif_obj.dev[j];
2115                                 video_device_release(ch->video_dev);
2116                         }
2117                         err = -ENOMEM;
2118                         goto vpif_int_err;
2119                 }
2120
2121                 /* Initialize field of video device */
2122                 *vfd = vpif_video_template;
2123                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
2124                 vfd->release = video_device_release;
2125                 snprintf(vfd->name, sizeof(vfd->name),
2126                          "VPIF_Capture_DRIVER_V%s",
2127                          VPIF_CAPTURE_VERSION);
2128                 /* Set video_dev to the video device */
2129                 ch->video_dev = vfd;
2130         }
2131
2132         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2133         if (res) {
2134                 size = resource_size(res);
2135                 /* The resources are divided into two equal memory and when we
2136                  * have HD output we can add them together
2137                  */
2138                 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
2139                         ch = vpif_obj.dev[j];
2140                         ch->channel_id = j;
2141                         /* only enabled if second resource exists */
2142                         config_params.video_limit[ch->channel_id] = 0;
2143                         if (size)
2144                                 config_params.video_limit[ch->channel_id] =
2145                                                                         size/2;
2146                 }
2147         }
2148
2149         i2c_adap = i2c_get_adapter(1);
2150         config = pdev->dev.platform_data;
2151
2152         subdev_count = config->subdev_count;
2153         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
2154                                 GFP_KERNEL);
2155         if (vpif_obj.sd == NULL) {
2156                 vpif_err("unable to allocate memory for subdevice pointers\n");
2157                 err = -ENOMEM;
2158                 goto vpif_sd_error;
2159         }
2160
2161         for (i = 0; i < subdev_count; i++) {
2162                 subdevdata = &config->subdev_info[i];
2163                 vpif_obj.sd[i] =
2164                         v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
2165                                                   i2c_adap,
2166                                                   &subdevdata->board_info,
2167                                                   NULL);
2168
2169                 if (!vpif_obj.sd[i]) {
2170                         vpif_err("Error registering v4l2 subdevice\n");
2171                         goto probe_subdev_out;
2172                 }
2173                 v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n",
2174                           subdevdata->name);
2175         }
2176
2177         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
2178                 ch = vpif_obj.dev[j];
2179                 ch->channel_id = j;
2180                 common = &(ch->common[VPIF_VIDEO_INDEX]);
2181                 spin_lock_init(&common->irqlock);
2182                 mutex_init(&common->lock);
2183                 ch->video_dev->lock = &common->lock;
2184                 /* Initialize prio member of channel object */
2185                 v4l2_prio_init(&ch->prio);
2186                 video_set_drvdata(ch->video_dev, ch);
2187
2188                 /* select input 0 */
2189                 err = vpif_set_input(config, ch, 0);
2190                 if (err)
2191                         goto probe_out;
2192
2193                 err = video_register_device(ch->video_dev,
2194                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
2195                 if (err)
2196                         goto probe_out;
2197         }
2198         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
2199         return 0;
2200
2201 probe_out:
2202         for (k = 0; k < j; k++) {
2203                 /* Get the pointer to the channel object */
2204                 ch = vpif_obj.dev[k];
2205                 /* Unregister video device */
2206                 video_unregister_device(ch->video_dev);
2207         }
2208 probe_subdev_out:
2209         /* free sub devices memory */
2210         kfree(vpif_obj.sd);
2211
2212 vpif_sd_error:
2213         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2214                 ch = vpif_obj.dev[i];
2215                 /* Note: does nothing if ch->video_dev == NULL */
2216                 video_device_release(ch->video_dev);
2217         }
2218 vpif_int_err:
2219         v4l2_device_unregister(&vpif_obj.v4l2_dev);
2220         for (i = 0; i < res_idx; i++) {
2221                 res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
2222                 for (j = res->start; j <= res->end; j++)
2223                         free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
2224         }
2225         return err;
2226 }
2227
2228 /**
2229  * vpif_remove() - driver remove handler
2230  * @device: ptr to platform device structure
2231  *
2232  * The vidoe device is unregistered
2233  */
2234 static int vpif_remove(struct platform_device *device)
2235 {
2236         int i;
2237         struct channel_obj *ch;
2238
2239         v4l2_device_unregister(&vpif_obj.v4l2_dev);
2240
2241         /* un-register device */
2242         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2243                 /* Get the pointer to the channel object */
2244                 ch = vpif_obj.dev[i];
2245                 /* Unregister video device */
2246                 video_unregister_device(ch->video_dev);
2247         }
2248         return 0;
2249 }
2250
2251 #ifdef CONFIG_PM
2252 /**
2253  * vpif_suspend: vpif device suspend
2254  */
2255 static int vpif_suspend(struct device *dev)
2256 {
2257
2258         struct common_obj *common;
2259         struct channel_obj *ch;
2260         int i;
2261
2262         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2263                 /* Get the pointer to the channel object */
2264                 ch = vpif_obj.dev[i];
2265                 common = &ch->common[VPIF_VIDEO_INDEX];
2266                 mutex_lock(&common->lock);
2267                 if (ch->usrs && common->io_usrs) {
2268                         /* Disable channel */
2269                         if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2270                                 enable_channel0(0);
2271                                 channel0_intr_enable(0);
2272                         }
2273                         if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2274                             common->started == 2) {
2275                                 enable_channel1(0);
2276                                 channel1_intr_enable(0);
2277                         }
2278                 }
2279                 mutex_unlock(&common->lock);
2280         }
2281
2282         return 0;
2283 }
2284
2285 /*
2286  * vpif_resume: vpif device suspend
2287  */
2288 static int vpif_resume(struct device *dev)
2289 {
2290         struct common_obj *common;
2291         struct channel_obj *ch;
2292         int i;
2293
2294         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2295                 /* Get the pointer to the channel object */
2296                 ch = vpif_obj.dev[i];
2297                 common = &ch->common[VPIF_VIDEO_INDEX];
2298                 mutex_lock(&common->lock);
2299                 if (ch->usrs && common->io_usrs) {
2300                         /* Disable channel */
2301                         if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2302                                 enable_channel0(1);
2303                                 channel0_intr_enable(1);
2304                         }
2305                         if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2306                             common->started == 2) {
2307                                 enable_channel1(1);
2308                                 channel1_intr_enable(1);
2309                         }
2310                 }
2311                 mutex_unlock(&common->lock);
2312         }
2313
2314         return 0;
2315 }
2316
2317 static const struct dev_pm_ops vpif_dev_pm_ops = {
2318         .suspend = vpif_suspend,
2319         .resume = vpif_resume,
2320 };
2321
2322 #define vpif_pm_ops (&vpif_dev_pm_ops)
2323 #else
2324 #define vpif_pm_ops NULL
2325 #endif
2326
2327 static __refdata struct platform_driver vpif_driver = {
2328         .driver = {
2329                 .name   = "vpif_capture",
2330                 .owner  = THIS_MODULE,
2331                 .pm     = vpif_pm_ops,
2332         },
2333         .probe = vpif_probe,
2334         .remove = vpif_remove,
2335 };
2336
2337 /**
2338  * vpif_init: initialize the vpif driver
2339  *
2340  * This function registers device and driver to the kernel, requests irq
2341  * handler and allocates memory
2342  * for channel objects
2343  */
2344 static __init int vpif_init(void)
2345 {
2346         return platform_driver_register(&vpif_driver);
2347 }
2348
2349 /**
2350  * vpif_cleanup : This function clean up the vpif capture resources
2351  *
2352  * This will un-registers device and driver to the kernel, frees
2353  * requested irq handler and de-allocates memory allocated for channel
2354  * objects.
2355  */
2356 static void vpif_cleanup(void)
2357 {
2358         struct platform_device *pdev;
2359         struct resource *res;
2360         int irq_num;
2361         int i = 0;
2362
2363         pdev = container_of(vpif_dev, struct platform_device, dev);
2364         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2365                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
2366                         free_irq(irq_num,
2367                                  (void *)(&vpif_obj.dev[i]->channel_id));
2368                 i++;
2369         }
2370
2371         platform_driver_unregister(&vpif_driver);
2372
2373         kfree(vpif_obj.sd);
2374         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++)
2375                 kfree(vpif_obj.dev[i]);
2376 }
2377
2378 /* Function for module initialization and cleanup */
2379 module_init(vpif_init);
2380 module_exit(vpif_cleanup);