drivers/media/platform/davinci/vpif_capture.c

   1 /*
   2  * Copyright (C) 2009 Texas Instruments Inc
   3  * Copyright (C) 2014 Lad, Prabhakar <prabhakar.csengg@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  * TODO : add support for VBI & HBI data service
  20  *        add static buffer allocation
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/slab.h>
  27
  28 #include <media/v4l2-ioctl.h>
  29
  30 #include "vpif.h"
  31 #include "vpif_capture.h"
  32
  33 MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
  34 MODULE_LICENSE("GPL");
  35 MODULE_VERSION(VPIF_CAPTURE_VERSION);
  36
  37 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  38 #define vpif_dbg(level, debug, fmt, arg...)     \
  39                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  40
  41 static int debug = 1;
  42
  43 module_param(debug, int, 0644);
  44
  45 MODULE_PARM_DESC(debug, "Debug level 0-1");
  46
  47 #define VPIF_DRIVER_NAME        "vpif_capture"
  48
  49 /* global variables */
  50 static struct vpif_device vpif_obj = { {NULL} };
  51 static struct device *vpif_dev;
  52 static void vpif_calculate_offsets(struct channel_obj *ch);
  53 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  54
  55 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = { {1, 1} };
  56
  57 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
  58 static int ycmux_mode;
  59
  60 static inline
  61 struct vpif_cap_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
  62 {
  63         return container_of(vb, struct vpif_cap_buffer, vb);
  64 }
  65
  66 /**
  67  * vpif_buffer_prepare :  callback function for buffer prepare
  68  * @vb: ptr to vb2_buffer
  69  *
  70  * This is the callback function for buffer prepare when vb2_qbuf()
  71  * function is called. The buffer is prepared and user space virtual address
  72  * or user address is converted into  physical address
  73  */
  74 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  75 {
  76         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  77         struct vb2_queue *q = vb->vb2_queue;
  78         struct channel_obj *ch = vb2_get_drv_priv(q);
  79         struct common_obj *common;
  80         unsigned long addr;
  81
  82         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
  83
  84         common = &ch->common[VPIF_VIDEO_INDEX];
  85
  86         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  87         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
  88                 return -EINVAL;
  89
  90         vbuf->field = common->fmt.fmt.pix.field;
  91
  92         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
  93         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
  94                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
  95                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
  96                 !IS_ALIGNED((addr + common->cbtm_off), 8)) {
  97                 vpif_dbg(1, debug, "offset is not aligned\n");
  98                 return -EINVAL;
  99         }
 100
 101         return 0;
 102 }
 103
 104 /**
 105  * vpif_buffer_queue_setup : Callback function for buffer setup.
 106  * @vq: vb2_queue ptr
 107  * @fmt: v4l2 format
 108  * @nbuffers: ptr to number of buffers requested by application
 109  * @nplanes:: contains number of distinct video planes needed to hold a frame
 110  * @sizes[]: contains the size (in bytes) of each plane.
 111  * @alloc_ctxs: ptr to allocation context
 112  *
 113  * This callback function is called when reqbuf() is called to adjust
 114  * the buffer count and buffer size
 115  */
 116 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 117                                 const void *parg,
 118                                 unsigned int *nbuffers, unsigned int *nplanes,
 119                                 unsigned int sizes[], void *alloc_ctxs[])
 120 {
 121         const struct v4l2_format *fmt = parg;
 122         struct channel_obj *ch = vb2_get_drv_priv(vq);
 123         struct common_obj *common;
 124
 125         common = &ch->common[VPIF_VIDEO_INDEX];
 126
 127         vpif_dbg(2, debug, "vpif_buffer_setup\n");
 128
 129         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
 130                 return -EINVAL;
 131
 132         if (vq->num_buffers + *nbuffers < 3)
 133                 *nbuffers = 3 - vq->num_buffers;
 134
 135         *nplanes = 1;
 136         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
 137         alloc_ctxs[0] = common->alloc_ctx;
 138
 139         /* Calculate the offset for Y and C data in the buffer */
 140         vpif_calculate_offsets(ch);
 141
 142         return 0;
 143 }
 144
 145 /**
 146  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 147  * @vb: ptr to vb2_buffer
 148  */
 149 static void vpif_buffer_queue(struct vb2_buffer *vb)
 150 {
 151         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 152         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 153         struct vpif_cap_buffer *buf = to_vpif_buffer(vbuf);
 154         struct common_obj *common;
 155         unsigned long flags;
 156
 157         common = &ch->common[VPIF_VIDEO_INDEX];
 158
 159         vpif_dbg(2, debug, "vpif_buffer_queue\n");
 160
 161         spin_lock_irqsave(&common->irqlock, flags);
 162         /* add the buffer to the DMA queue */
 163         list_add_tail(&buf->list, &common->dma_queue);
 164         spin_unlock_irqrestore(&common->irqlock, flags);
 165 }
 166
 167 /**
 168  * vpif_start_streaming : Starts the DMA engine for streaming
 169  * @vb: ptr to vb2_buffer
 170  * @count: number of buffers
 171  */
 172 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 173 {
 174         struct vpif_capture_config *vpif_config_data =
 175                                         vpif_dev->platform_data;
 176         struct channel_obj *ch = vb2_get_drv_priv(vq);
 177         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 178         struct vpif_params *vpif = &ch->vpifparams;
 179         struct vpif_cap_buffer *buf, *tmp;
 180         unsigned long addr, flags;
 181         int ret;
 182
 183         spin_lock_irqsave(&common->irqlock, flags);
 184
 185         /* Initialize field_id */
 186         ch->field_id = 0;
 187
 188         /* configure 1 or 2 channel mode */
 189         if (vpif_config_data->setup_input_channel_mode) {
 190                 ret = vpif_config_data->
 191                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
 192                 if (ret < 0) {
 193                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
 194                         goto err;
 195                 }
 196         }
 197
 198         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
 199         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
 200                 vpif_dbg(1, debug, "stream on failed in subdev\n");
 201                 goto err;
 202         }
 203
 204         /* Call vpif_set_params function to set the parameters and addresses */
 205         ret = vpif_set_video_params(vpif, ch->channel_id);
 206         if (ret < 0) {
 207                 vpif_dbg(1, debug, "can't set video params\n");
 208                 goto err;
 209         }
 210
 211         ycmux_mode = ret;
 212         vpif_config_addr(ch, ret);
 213
 214         /* Get the next frame from the buffer queue */
 215         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
 216                                     struct vpif_cap_buffer, list);
 217         /* Remove buffer from the buffer queue */
 218         list_del(&common->cur_frm->list);
 219         spin_unlock_irqrestore(&common->irqlock, flags);
 220
 221         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
 222
 223         common->set_addr(addr + common->ytop_off,
 224                          addr + common->ybtm_off,
 225                          addr + common->ctop_off,
 226                          addr + common->cbtm_off);
 227
 228         /**
 229          * Set interrupt for both the fields in VPIF Register enable channel in
 230          * VPIF register
 231          */
 232         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 233         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 234                 channel0_intr_assert();
 235                 channel0_intr_enable(1);
 236                 enable_channel0(1);
 237         }
 238         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
 239                 ycmux_mode == 2) {
 240                 channel1_intr_assert();
 241                 channel1_intr_enable(1);
 242                 enable_channel1(1);
 243         }
 244
 245         return 0;
 246
 247 err:
 248         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
 249                 list_del(&buf->list);
 250                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 251         }
 252         spin_unlock_irqrestore(&common->irqlock, flags);
 253
 254         return ret;
 255 }
 256
 257 /**
 258  * vpif_stop_streaming : Stop the DMA engine
 259  * @vq: ptr to vb2_queue
 260  *
 261  * This callback stops the DMA engine and any remaining buffers
 262  * in the DMA queue are released.
 263  */
 264 static void vpif_stop_streaming(struct vb2_queue *vq)
 265 {
 266         struct channel_obj *ch = vb2_get_drv_priv(vq);
 267         struct common_obj *common;
 268         unsigned long flags;
 269         int ret;
 270
 271         common = &ch->common[VPIF_VIDEO_INDEX];
 272
 273         /* Disable channel as per its device type and channel id */
 274         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 275                 enable_channel0(0);
 276                 channel0_intr_enable(0);
 277         }
 278         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
 279                 ycmux_mode == 2) {
 280                 enable_channel1(0);
 281                 channel1_intr_enable(0);
 282         }
 283
 284         ycmux_mode = 0;
 285
 286         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
 287         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
 288                 vpif_dbg(1, debug, "stream off failed in subdev\n");
 289
 290         /* release all active buffers */
 291         spin_lock_irqsave(&common->irqlock, flags);
 292         if (common->cur_frm == common->next_frm) {
 293                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 294                                 VB2_BUF_STATE_ERROR);
 295         } else {
 296                 if (common->cur_frm != NULL)
 297                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 298                                         VB2_BUF_STATE_ERROR);
 299                 if (common->next_frm != NULL)
 300                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 301                                         VB2_BUF_STATE_ERROR);
 302         }
 303
 304         while (!list_empty(&common->dma_queue)) {
 305                 common->next_frm = list_entry(common->dma_queue.next,
 306                                                 struct vpif_cap_buffer, list);
 307                 list_del(&common->next_frm->list);
 308                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 309                                 VB2_BUF_STATE_ERROR);
 310         }
 311         spin_unlock_irqrestore(&common->irqlock, flags);
 312 }
 313
 314 static struct vb2_ops video_qops = {
 315         .queue_setup            = vpif_buffer_queue_setup,
 316         .buf_prepare            = vpif_buffer_prepare,
 317         .start_streaming        = vpif_start_streaming,
 318         .stop_streaming         = vpif_stop_streaming,
 319         .buf_queue              = vpif_buffer_queue,
 320         .wait_prepare           = vb2_ops_wait_prepare,
 321         .wait_finish            = vb2_ops_wait_finish,
 322 };
 323
 324 /**
 325  * vpif_process_buffer_complete: process a completed buffer
 326  * @common: ptr to common channel object
 327  *
 328  * This function time stamp the buffer and mark it as DONE. It also
 329  * wake up any process waiting on the QUEUE and set the next buffer
 330  * as current
 331  */
 332 static void vpif_process_buffer_complete(struct common_obj *common)
 333 {
 334         v4l2_get_timestamp(&common->cur_frm->vb.timestamp);
 335         vb2_buffer_done(&common->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
 336         /* Make curFrm pointing to nextFrm */
 337         common->cur_frm = common->next_frm;
 338 }
 339
 340 /**
 341  * vpif_schedule_next_buffer: set next buffer address for capture
 342  * @common : ptr to common channel object
 343  *
 344  * This function will get next buffer from the dma queue and
 345  * set the buffer address in the vpif register for capture.
 346  * the buffer is marked active
 347  */
 348 static void vpif_schedule_next_buffer(struct common_obj *common)
 349 {
 350         unsigned long addr = 0;
 351
 352         spin_lock(&common->irqlock);
 353         common->next_frm = list_entry(common->dma_queue.next,
 354                                      struct vpif_cap_buffer, list);
 355         /* Remove that buffer from the buffer queue */
 356         list_del(&common->next_frm->list);
 357         spin_unlock(&common->irqlock);
 358         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
 359
 360         /* Set top and bottom field addresses in VPIF registers */
 361         common->set_addr(addr + common->ytop_off,
 362                          addr + common->ybtm_off,
 363                          addr + common->ctop_off,
 364                          addr + common->cbtm_off);
 365 }
 366
 367 /**
 368  * vpif_channel_isr : ISR handler for vpif capture
 369  * @irq: irq number
 370  * @dev_id: dev_id ptr
 371  *
 372  * It changes status of the captured buffer, takes next buffer from the queue
 373  * and sets its address in VPIF registers
 374  */
 375 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 376 {
 377         struct vpif_device *dev = &vpif_obj;
 378         struct common_obj *common;
 379         struct channel_obj *ch;
 380         int channel_id = 0;
 381         int fid = -1, i;
 382
 383         channel_id = *(int *)(dev_id);
 384         if (!vpif_intr_status(channel_id))
 385                 return IRQ_NONE;
 386
 387         ch = dev->dev[channel_id];
 388
 389         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
 390                 common = &ch->common[i];
 391                 /* skip If streaming is not started in this channel */
 392                 /* Check the field format */
 393                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 394                         /* Progressive mode */
 395                         spin_lock(&common->irqlock);
 396                         if (list_empty(&common->dma_queue)) {
 397                                 spin_unlock(&common->irqlock);
 398                                 continue;
 399                         }
 400                         spin_unlock(&common->irqlock);
 401
 402                         if (!channel_first_int[i][channel_id])
 403                                 vpif_process_buffer_complete(common);
 404
 405                         channel_first_int[i][channel_id] = 0;
 406
 407                         vpif_schedule_next_buffer(common);
 408
 409
 410                         channel_first_int[i][channel_id] = 0;
 411                 } else {
 412                         /**
 413                          * Interlaced mode. If it is first interrupt, ignore
 414                          * it
 415                          */
 416                         if (channel_first_int[i][channel_id]) {
 417                                 channel_first_int[i][channel_id] = 0;
 418                                 continue;
 419                         }
 420                         if (0 == i) {
 421                                 ch->field_id ^= 1;
 422                                 /* Get field id from VPIF registers */
 423                                 fid = vpif_channel_getfid(ch->channel_id);
 424                                 if (fid != ch->field_id) {
 425                                         /**
 426                                          * If field id does not match stored
 427                                          * field id, make them in sync
 428                                          */
 429                                         if (0 == fid)
 430                                                 ch->field_id = fid;
 431                                         return IRQ_HANDLED;
 432                                 }
 433                         }
 434                         /* device field id and local field id are in sync */
 435                         if (0 == fid) {
 436                                 /* this is even field */
 437                                 if (common->cur_frm == common->next_frm)
 438                                         continue;
 439
 440                                 /* mark the current buffer as done */
 441                                 vpif_process_buffer_complete(common);
 442                         } else if (1 == fid) {
 443                                 /* odd field */
 444                                 spin_lock(&common->irqlock);
 445                                 if (list_empty(&common->dma_queue) ||
 446                                     (common->cur_frm != common->next_frm)) {
 447                                         spin_unlock(&common->irqlock);
 448                                         continue;
 449                                 }
 450                                 spin_unlock(&common->irqlock);
 451
 452                                 vpif_schedule_next_buffer(common);
 453                         }
 454                 }
 455         }
 456         return IRQ_HANDLED;
 457 }
 458
 459 /**
 460  * vpif_update_std_info() - update standard related info
 461  * @ch: ptr to channel object
 462  *
 463  * For a given standard selected by application, update values
 464  * in the device data structures
 465  */
 466 static int vpif_update_std_info(struct channel_obj *ch)
 467 {
 468         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 469         struct vpif_params *vpifparams = &ch->vpifparams;
 470         const struct vpif_channel_config_params *config;
 471         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 472         struct video_obj *vid_ch = &ch->video;
 473         int index;
 474
 475         vpif_dbg(2, debug, "vpif_update_std_info\n");
 476
 477         for (index = 0; index < vpif_ch_params_count; index++) {
 478                 config = &vpif_ch_params[index];
 479                 if (config->hd_sd == 0) {
 480                         vpif_dbg(2, debug, "SD format\n");
 481                         if (config->stdid & vid_ch->stdid) {
 482                                 memcpy(std_info, config, sizeof(*config));
 483                                 break;
 484                         }
 485                 } else {
 486                         vpif_dbg(2, debug, "HD format\n");
 487                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
 488                                 sizeof(vid_ch->dv_timings))) {
 489                                 memcpy(std_info, config, sizeof(*config));
 490                                 break;
 491                         }
 492                 }
 493         }
 494
 495         /* standard not found */
 496         if (index == vpif_ch_params_count)
 497                 return -EINVAL;
 498
 499         common->fmt.fmt.pix.width = std_info->width;
 500         common->width = std_info->width;
 501         common->fmt.fmt.pix.height = std_info->height;
 502         common->height = std_info->height;
 503         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
 504         common->fmt.fmt.pix.bytesperline = std_info->width;
 505         vpifparams->video_params.hpitch = std_info->width;
 506         vpifparams->video_params.storage_mode = std_info->frm_fmt;
 507
 508         if (vid_ch->stdid)
 509                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 510         else
 511                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
 512
 513         if (ch->vpifparams.std_info.frm_fmt)
 514                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
 515         else
 516                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
 517
 518         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 519                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 520         else
 521                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 522
 523         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 524
 525         return 0;
 526 }
 527
 528 /**
 529  * vpif_calculate_offsets : This function calculates buffers offsets
 530  * @ch : ptr to channel object
 531  *
 532  * This function calculates buffer offsets for Y and C in the top and
 533  * bottom field
 534  */
 535 static void vpif_calculate_offsets(struct channel_obj *ch)
 536 {
 537         unsigned int hpitch, sizeimage;
 538         struct video_obj *vid_ch = &(ch->video);
 539         struct vpif_params *vpifparams = &ch->vpifparams;
 540         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 541         enum v4l2_field field = common->fmt.fmt.pix.field;
 542
 543         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
 544
 545         if (V4L2_FIELD_ANY == field) {
 546                 if (vpifparams->std_info.frm_fmt)
 547                         vid_ch->buf_field = V4L2_FIELD_NONE;
 548                 else
 549                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 550         } else
 551                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 552
 553         sizeimage = common->fmt.fmt.pix.sizeimage;
 554
 555         hpitch = common->fmt.fmt.pix.bytesperline;
 556
 557         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 558             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 559                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 560                 common->ytop_off = 0;
 561                 common->ybtm_off = hpitch;
 562                 common->ctop_off = sizeimage / 2;
 563                 common->cbtm_off = sizeimage / 2 + hpitch;
 564         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 565                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 566                 common->ytop_off = 0;
 567                 common->ybtm_off = sizeimage / 4;
 568                 common->ctop_off = sizeimage / 2;
 569                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 570         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 571                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 572                 common->ybtm_off = 0;
 573                 common->ytop_off = sizeimage / 4;
 574                 common->cbtm_off = sizeimage / 2;
 575                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 576         }
 577         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 578             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
 579                 vpifparams->video_params.storage_mode = 1;
 580         else
 581                 vpifparams->video_params.storage_mode = 0;
 582
 583         if (1 == vpifparams->std_info.frm_fmt)
 584                 vpifparams->video_params.hpitch =
 585                     common->fmt.fmt.pix.bytesperline;
 586         else {
 587                 if ((field == V4L2_FIELD_ANY)
 588                     || (field == V4L2_FIELD_INTERLACED))
 589                         vpifparams->video_params.hpitch =
 590                             common->fmt.fmt.pix.bytesperline * 2;
 591                 else
 592                         vpifparams->video_params.hpitch =
 593                             common->fmt.fmt.pix.bytesperline;
 594         }
 595
 596         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
 597 }
 598
 599 /**
 600  * vpif_get_default_field() - Get default field type based on interface
 601  * @vpif_params - ptr to vpif params
 602  */
 603 static inline enum v4l2_field vpif_get_default_field(
 604                                 struct vpif_interface *iface)
 605 {
 606         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
 607                                                 V4L2_FIELD_INTERLACED;
 608 }
 609
 610 /**
 611  * vpif_config_addr() - function to configure buffer address in vpif
 612  * @ch - channel ptr
 613  * @muxmode - channel mux mode
 614  */
 615 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 616 {
 617         struct common_obj *common;
 618
 619         vpif_dbg(2, debug, "vpif_config_addr\n");
 620
 621         common = &(ch->common[VPIF_VIDEO_INDEX]);
 622
 623         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
 624                 common->set_addr = ch1_set_videobuf_addr;
 625         else if (2 == muxmode)
 626                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
 627         else
 628                 common->set_addr = ch0_set_videobuf_addr;
 629 }
 630
 631 /**
 632  * vpif_input_to_subdev() - Maps input to sub device
 633  * @vpif_cfg - global config ptr
 634  * @chan_cfg - channel config ptr
 635  * @input_index - Given input index from application
 636  *
 637  * lookup the sub device information for a given input index.
 638  * we report all the inputs to application. inputs table also
 639  * has sub device name for the each input
 640  */
 641 static int vpif_input_to_subdev(
 642                 struct vpif_capture_config *vpif_cfg,
 643                 struct vpif_capture_chan_config *chan_cfg,
 644                 int input_index)
 645 {
 646         struct vpif_subdev_info *subdev_info;
 647         const char *subdev_name;
 648         int i;
 649
 650         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
 651
 652         subdev_name = chan_cfg->inputs[input_index].subdev_name;
 653         if (subdev_name == NULL)
 654                 return -1;
 655
 656         /* loop through the sub device list to get the sub device info */
 657         for (i = 0; i < vpif_cfg->subdev_count; i++) {
 658                 subdev_info = &vpif_cfg->subdev_info[i];
 659                 if (!strcmp(subdev_info->name, subdev_name))
 660                         return i;
 661         }
 662         return -1;
 663 }
 664
 665 /**
 666  * vpif_set_input() - Select an input
 667  * @vpif_cfg - global config ptr
 668  * @ch - channel
 669  * @_index - Given input index from application
 670  *
 671  * Select the given input.
 672  */
 673 static int vpif_set_input(
 674                 struct vpif_capture_config *vpif_cfg,
 675                 struct channel_obj *ch,
 676                 int index)
 677 {
 678         struct vpif_capture_chan_config *chan_cfg =
 679                         &vpif_cfg->chan_config[ch->channel_id];
 680         struct vpif_subdev_info *subdev_info = NULL;
 681         struct v4l2_subdev *sd = NULL;
 682         u32 input = 0, output = 0;
 683         int sd_index;
 684         int ret;
 685
 686         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
 687         if (sd_index >= 0) {
 688                 sd = vpif_obj.sd[sd_index];
 689                 subdev_info = &vpif_cfg->subdev_info[sd_index];
 690         }
 691
 692         /* first setup input path from sub device to vpif */
 693         if (sd && vpif_cfg->setup_input_path) {
 694                 ret = vpif_cfg->setup_input_path(ch->channel_id,
 695                                        subdev_info->name);
 696                 if (ret < 0) {
 697                         vpif_dbg(1, debug, "couldn't setup input path for the" \
 698                         " sub device %s, for input index %d\n",
 699                         subdev_info->name, index);
 700                         return ret;
 701                 }
 702         }
 703
 704         if (sd) {
 705                 input = chan_cfg->inputs[index].input_route;
 706                 output = chan_cfg->inputs[index].output_route;
 707                 ret = v4l2_subdev_call(sd, video, s_routing,
 708                                 input, output, 0);
 709                 if (ret < 0 && ret != -ENOIOCTLCMD) {
 710                         vpif_dbg(1, debug, "Failed to set input\n");
 711                         return ret;
 712                 }
 713         }
 714         ch->input_idx = index;
 715         ch->sd = sd;
 716         /* copy interface parameters to vpif */
 717         ch->vpifparams.iface = chan_cfg->vpif_if;
 718
 719         /* update tvnorms from the sub device input info */
 720         ch->video_dev.tvnorms = chan_cfg->inputs[index].input.std;
 721         return 0;
 722 }
 723
 724 /**
 725  * vpif_querystd() - querystd handler
 726  * @file: file ptr
 727  * @priv: file handle
 728  * @std_id: ptr to std id
 729  *
 730  * This function is called to detect standard at the selected input
 731  */
 732 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 733 {
 734         struct video_device *vdev = video_devdata(file);
 735         struct channel_obj *ch = video_get_drvdata(vdev);
 736         int ret = 0;
 737
 738         vpif_dbg(2, debug, "vpif_querystd\n");
 739
 740         /* Call querystd function of decoder device */
 741         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
 742
 743         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 744                 return -ENODATA;
 745         if (ret) {
 746                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
 747                 return ret;
 748         }
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * vpif_g_std() - get STD handler
 755  * @file: file ptr
 756  * @priv: file handle
 757  * @std_id: ptr to std id
 758  */
 759 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
 760 {
 761         struct vpif_capture_config *config = vpif_dev->platform_data;
 762         struct video_device *vdev = video_devdata(file);
 763         struct channel_obj *ch = video_get_drvdata(vdev);
 764         struct vpif_capture_chan_config *chan_cfg;
 765         struct v4l2_input input;
 766
 767         vpif_dbg(2, debug, "vpif_g_std\n");
 768
 769         if (config->chan_config[ch->channel_id].inputs == NULL)
 770                 return -ENODATA;
 771
 772         chan_cfg = &config->chan_config[ch->channel_id];
 773         input = chan_cfg->inputs[ch->input_idx].input;
 774         if (input.capabilities != V4L2_IN_CAP_STD)
 775                 return -ENODATA;
 776
 777         *std = ch->video.stdid;
 778         return 0;
 779 }
 780
 781 /**
 782  * vpif_s_std() - set STD handler
 783  * @file: file ptr
 784  * @priv: file handle
 785  * @std_id: ptr to std id
 786  */
 787 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 788 {
 789         struct vpif_capture_config *config = vpif_dev->platform_data;
 790         struct video_device *vdev = video_devdata(file);
 791         struct channel_obj *ch = video_get_drvdata(vdev);
 792         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 793         struct vpif_capture_chan_config *chan_cfg;
 794         struct v4l2_input input;
 795         int ret;
 796
 797         vpif_dbg(2, debug, "vpif_s_std\n");
 798
 799         if (config->chan_config[ch->channel_id].inputs == NULL)
 800                 return -ENODATA;
 801
 802         chan_cfg = &config->chan_config[ch->channel_id];
 803         input = chan_cfg->inputs[ch->input_idx].input;
 804         if (input.capabilities != V4L2_IN_CAP_STD)
 805                 return -ENODATA;
 806
 807         if (vb2_is_busy(&common->buffer_queue))
 808                 return -EBUSY;
 809
 810         /* Call encoder subdevice function to set the standard */
 811         ch->video.stdid = std_id;
 812         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
 813
 814         /* Get the information about the standard */
 815         if (vpif_update_std_info(ch)) {
 816                 vpif_err("Error getting the standard info\n");
 817                 return -EINVAL;
 818         }
 819
 820         /* set standard in the sub device */
 821         ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
 822         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
 823                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
 824                 return ret;
 825         }
 826         return 0;
 827 }
 828
 829 /**
 830  * vpif_enum_input() - ENUMINPUT handler
 831  * @file: file ptr
 832  * @priv: file handle
 833  * @input: ptr to input structure
 834  */
 835 static int vpif_enum_input(struct file *file, void *priv,
 836                                 struct v4l2_input *input)
 837 {
 838
 839         struct vpif_capture_config *config = vpif_dev->platform_data;
 840         struct video_device *vdev = video_devdata(file);
 841         struct channel_obj *ch = video_get_drvdata(vdev);
 842         struct vpif_capture_chan_config *chan_cfg;
 843
 844         chan_cfg = &config->chan_config[ch->channel_id];
 845
 846         if (input->index >= chan_cfg->input_count)
 847                 return -EINVAL;
 848
 849         memcpy(input, &chan_cfg->inputs[input->index].input,
 850                 sizeof(*input));
 851         return 0;
 852 }
 853
 854 /**
 855  * vpif_g_input() - Get INPUT handler
 856  * @file: file ptr
 857  * @priv: file handle
 858  * @index: ptr to input index
 859  */
 860 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
 861 {
 862         struct video_device *vdev = video_devdata(file);
 863         struct channel_obj *ch = video_get_drvdata(vdev);
 864
 865         *index = ch->input_idx;
 866         return 0;
 867 }
 868
 869 /**
 870  * vpif_s_input() - Set INPUT handler
 871  * @file: file ptr
 872  * @priv: file handle
 873  * @index: input index
 874  */
 875 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
 876 {
 877         struct vpif_capture_config *config = vpif_dev->platform_data;
 878         struct video_device *vdev = video_devdata(file);
 879         struct channel_obj *ch = video_get_drvdata(vdev);
 880         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 881         struct vpif_capture_chan_config *chan_cfg;
 882
 883         chan_cfg = &config->chan_config[ch->channel_id];
 884
 885         if (index >= chan_cfg->input_count)
 886                 return -EINVAL;
 887
 888         if (vb2_is_busy(&common->buffer_queue))
 889                 return -EBUSY;
 890
 891         return vpif_set_input(config, ch, index);
 892 }
 893
 894 /**
 895  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
 896  * @file: file ptr
 897  * @priv: file handle
 898  * @index: input index
 899  */
 900 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
 901                                         struct v4l2_fmtdesc *fmt)
 902 {
 903         struct video_device *vdev = video_devdata(file);
 904         struct channel_obj *ch = video_get_drvdata(vdev);
 905
 906         if (fmt->index != 0) {
 907                 vpif_dbg(1, debug, "Invalid format index\n");
 908                 return -EINVAL;
 909         }
 910
 911         /* Fill in the information about format */
 912         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
 913                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 914                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
 915                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 916         } else {
 917                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 918                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 919                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 920         }
 921         return 0;
 922 }
 923
 924 /**
 925  * vpif_try_fmt_vid_cap() - TRY_FMT handler
 926  * @file: file ptr
 927  * @priv: file handle
 928  * @fmt: ptr to v4l2 format structure
 929  */
 930 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
 931                                 struct v4l2_format *fmt)
 932 {
 933         struct video_device *vdev = video_devdata(file);
 934         struct channel_obj *ch = video_get_drvdata(vdev);
 935         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 936         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 937         struct vpif_params *vpif_params = &ch->vpifparams;
 938
 939         /*
 940          * to supress v4l-compliance warnings silently correct
 941          * the pixelformat
 942          */
 943         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
 944                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8)
 945                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 946         } else {
 947                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 948                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 949         }
 950
 951         common->fmt.fmt.pix.pixelformat = pixfmt->pixelformat;
 952
 953         vpif_update_std_info(ch);
 954
 955         pixfmt->field = common->fmt.fmt.pix.field;
 956         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
 957         pixfmt->bytesperline = common->fmt.fmt.pix.width;
 958         pixfmt->width = common->fmt.fmt.pix.width;
 959         pixfmt->height = common->fmt.fmt.pix.height;
 960         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
 961         pixfmt->priv = 0;
 962
 963         return 0;
 964 }
 965
 966
 967 /**
 968  * vpif_g_fmt_vid_cap() - Set INPUT handler
 969  * @file: file ptr
 970  * @priv: file handle
 971  * @fmt: ptr to v4l2 format structure
 972  */
 973 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
 974                                 struct v4l2_format *fmt)
 975 {
 976         struct video_device *vdev = video_devdata(file);
 977         struct channel_obj *ch = video_get_drvdata(vdev);
 978         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 979
 980         /* Check the validity of the buffer type */
 981         if (common->fmt.type != fmt->type)
 982                 return -EINVAL;
 983
 984         /* Fill in the information about format */
 985         *fmt = common->fmt;
 986         return 0;
 987 }
 988
 989 /**
 990  * vpif_s_fmt_vid_cap() - Set FMT handler
 991  * @file: file ptr
 992  * @priv: file handle
 993  * @fmt: ptr to v4l2 format structure
 994  */
 995 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
 996                                 struct v4l2_format *fmt)
 997 {
 998         struct video_device *vdev = video_devdata(file);
 999         struct channel_obj *ch = video_get_drvdata(vdev);
1000         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1001         int ret;
1002
1003         vpif_dbg(2, debug, "%s\n", __func__);
1004
1005         if (vb2_is_busy(&common->buffer_queue))
1006                 return -EBUSY;
1007
1008         ret = vpif_try_fmt_vid_cap(file, priv, fmt);
1009         if (ret)
1010                 return ret;
1011
1012         /* store the format in the channel object */
1013         common->fmt = *fmt;
1014         return 0;
1015 }
1016
1017 /**
1018  * vpif_querycap() - QUERYCAP handler
1019  * @file: file ptr
1020  * @priv: file handle
1021  * @cap: ptr to v4l2_capability structure
1022  */
1023 static int vpif_querycap(struct file *file, void  *priv,
1024                                 struct v4l2_capability *cap)
1025 {
1026         struct vpif_capture_config *config = vpif_dev->platform_data;
1027
1028         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1029         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1030         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
1031         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1032                  dev_name(vpif_dev));
1033         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1034
1035         return 0;
1036 }
1037
1038 /**
1039  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1040  * @file: file ptr
1041  * @priv: file handle
1042  * @timings: input timings
1043  */
1044 static int
1045 vpif_enum_dv_timings(struct file *file, void *priv,
1046                      struct v4l2_enum_dv_timings *timings)
1047 {
1048         struct vpif_capture_config *config = vpif_dev->platform_data;
1049         struct video_device *vdev = video_devdata(file);
1050         struct channel_obj *ch = video_get_drvdata(vdev);
1051         struct vpif_capture_chan_config *chan_cfg;
1052         struct v4l2_input input;
1053         int ret;
1054
1055         if (config->chan_config[ch->channel_id].inputs == NULL)
1056                 return -ENODATA;
1057
1058         chan_cfg = &config->chan_config[ch->channel_id];
1059         input = chan_cfg->inputs[ch->input_idx].input;
1060         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1061                 return -ENODATA;
1062
1063         timings->pad = 0;
1064
1065         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
1066         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1067                 return -EINVAL;
1068
1069         return ret;
1070 }
1071
1072 /**
1073  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1074  * @file: file ptr
1075  * @priv: file handle
1076  * @timings: input timings
1077  */
1078 static int
1079 vpif_query_dv_timings(struct file *file, void *priv,
1080                       struct v4l2_dv_timings *timings)
1081 {
1082         struct vpif_capture_config *config = vpif_dev->platform_data;
1083         struct video_device *vdev = video_devdata(file);
1084         struct channel_obj *ch = video_get_drvdata(vdev);
1085         struct vpif_capture_chan_config *chan_cfg;
1086         struct v4l2_input input;
1087         int ret;
1088
1089         if (config->chan_config[ch->channel_id].inputs == NULL)
1090                 return -ENODATA;
1091
1092         chan_cfg = &config->chan_config[ch->channel_id];
1093         input = chan_cfg->inputs[ch->input_idx].input;
1094         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1095                 return -ENODATA;
1096
1097         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1098         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1099                 return -ENODATA;
1100
1101         return ret;
1102 }
1103
1104 /**
1105  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1106  * @file: file ptr
1107  * @priv: file handle
1108  * @timings: digital video timings
1109  */
1110 static int vpif_s_dv_timings(struct file *file, void *priv,
1111                 struct v4l2_dv_timings *timings)
1112 {
1113         struct vpif_capture_config *config = vpif_dev->platform_data;
1114         struct video_device *vdev = video_devdata(file);
1115         struct channel_obj *ch = video_get_drvdata(vdev);
1116         struct vpif_params *vpifparams = &ch->vpifparams;
1117         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1118         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1119         struct video_obj *vid_ch = &ch->video;
1120         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1121         struct vpif_capture_chan_config *chan_cfg;
1122         struct v4l2_input input;
1123         int ret;
1124
1125         if (config->chan_config[ch->channel_id].inputs == NULL)
1126                 return -ENODATA;
1127
1128         chan_cfg = &config->chan_config[ch->channel_id];
1129         input = chan_cfg->inputs[ch->input_idx].input;
1130         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1131                 return -ENODATA;
1132
1133         if (timings->type != V4L2_DV_BT_656_1120) {
1134                 vpif_dbg(2, debug, "Timing type not defined\n");
1135                 return -EINVAL;
1136         }
1137
1138         if (vb2_is_busy(&common->buffer_queue))
1139                 return -EBUSY;
1140
1141         /* Configure subdevice timings, if any */
1142         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1143         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1144                 ret = 0;
1145         if (ret < 0) {
1146                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1147                 return ret;
1148         }
1149
1150         if (!(timings->bt.width && timings->bt.height &&
1151                                 (timings->bt.hbackporch ||
1152                                  timings->bt.hfrontporch ||
1153                                  timings->bt.hsync) &&
1154                                 timings->bt.vfrontporch &&
1155                                 (timings->bt.vbackporch ||
1156                                  timings->bt.vsync))) {
1157                 vpif_dbg(2, debug, "Timings for width, height, "
1158                                 "horizontal back porch, horizontal sync, "
1159                                 "horizontal front porch, vertical back porch, "
1160                                 "vertical sync and vertical back porch "
1161                                 "must be defined\n");
1162                 return -EINVAL;
1163         }
1164
1165         vid_ch->dv_timings = *timings;
1166
1167         /* Configure video port timings */
1168
1169         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1170         std_info->sav2eav = bt->width;
1171
1172         std_info->l1 = 1;
1173         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1174
1175         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1176         if (bt->interlaced) {
1177                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1178                         std_info->l5 = std_info->vsize/2 -
1179                                 (bt->vfrontporch - 1);
1180                         std_info->l7 = std_info->vsize/2 + 1;
1181                         std_info->l9 = std_info->l7 + bt->il_vsync +
1182                                 bt->il_vbackporch + 1;
1183                         std_info->l11 = std_info->vsize -
1184                                 (bt->il_vfrontporch - 1);
1185                 } else {
1186                         vpif_dbg(2, debug, "Required timing values for "
1187                                         "interlaced BT format missing\n");
1188                         return -EINVAL;
1189                 }
1190         } else {
1191                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1192         }
1193         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1194         std_info->width = bt->width;
1195         std_info->height = bt->height;
1196         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1197         std_info->ycmux_mode = 0;
1198         std_info->capture_format = 0;
1199         std_info->vbi_supported = 0;
1200         std_info->hd_sd = 1;
1201         std_info->stdid = 0;
1202
1203         vid_ch->stdid = 0;
1204         return 0;
1205 }
1206
1207 /**
1208  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1209  * @file: file ptr
1210  * @priv: file handle
1211  * @timings: digital video timings
1212  */
1213 static int vpif_g_dv_timings(struct file *file, void *priv,
1214                 struct v4l2_dv_timings *timings)
1215 {
1216         struct vpif_capture_config *config = vpif_dev->platform_data;
1217         struct video_device *vdev = video_devdata(file);
1218         struct channel_obj *ch = video_get_drvdata(vdev);
1219         struct video_obj *vid_ch = &ch->video;
1220         struct vpif_capture_chan_config *chan_cfg;
1221         struct v4l2_input input;
1222
1223         if (config->chan_config[ch->channel_id].inputs == NULL)
1224                 return -ENODATA;
1225
1226         chan_cfg = &config->chan_config[ch->channel_id];
1227         input = chan_cfg->inputs[ch->input_idx].input;
1228         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1229                 return -ENODATA;
1230
1231         *timings = vid_ch->dv_timings;
1232
1233         return 0;
1234 }
1235
1236 /*
1237  * vpif_log_status() - Status information
1238  * @file: file ptr
1239  * @priv: file handle
1240  *
1241  * Returns zero.
1242  */
1243 static int vpif_log_status(struct file *filep, void *priv)
1244 {
1245         /* status for sub devices */
1246         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1247
1248         return 0;
1249 }
1250
1251 /* vpif capture ioctl operations */
1252 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1253         .vidioc_querycap                = vpif_querycap,
1254         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1255         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1256         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1257         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1258
1259         .vidioc_enum_input              = vpif_enum_input,
1260         .vidioc_s_input                 = vpif_s_input,
1261         .vidioc_g_input                 = vpif_g_input,
1262
1263         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1264         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1265         .vidioc_querybuf                = vb2_ioctl_querybuf,
1266         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1267         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1268         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1269         .vidioc_streamon                = vb2_ioctl_streamon,
1270         .vidioc_streamoff               = vb2_ioctl_streamoff,
1271
1272         .vidioc_querystd                = vpif_querystd,
1273         .vidioc_s_std                   = vpif_s_std,
1274         .vidioc_g_std                   = vpif_g_std,
1275
1276         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1277         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1278         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1279         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1280
1281         .vidioc_log_status              = vpif_log_status,
1282 };
1283
1284 /* vpif file operations */
1285 static struct v4l2_file_operations vpif_fops = {
1286         .owner = THIS_MODULE,
1287         .open = v4l2_fh_open,
1288         .release = vb2_fop_release,
1289         .unlocked_ioctl = video_ioctl2,
1290         .mmap = vb2_fop_mmap,
1291         .poll = vb2_fop_poll
1292 };
1293
1294 /**
1295  * initialize_vpif() - Initialize vpif data structures
1296  *
1297  * Allocate memory for data structures and initialize them
1298  */
1299 static int initialize_vpif(void)
1300 {
1301         int err, i, j;
1302         int free_channel_objects_index;
1303
1304         /* Allocate memory for six channel objects */
1305         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1306                 vpif_obj.dev[i] =
1307                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1308                 /* If memory allocation fails, return error */
1309                 if (!vpif_obj.dev[i]) {
1310                         free_channel_objects_index = i;
1311                         err = -ENOMEM;
1312                         goto vpif_init_free_channel_objects;
1313                 }
1314         }
1315         return 0;
1316
1317 vpif_init_free_channel_objects:
1318         for (j = 0; j < free_channel_objects_index; j++)
1319                 kfree(vpif_obj.dev[j]);
1320         return err;
1321 }
1322
1323 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1324                             struct v4l2_subdev *subdev,
1325                             struct v4l2_async_subdev *asd)
1326 {
1327         int i;
1328
1329         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1330                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1331                             subdev->name)) {
1332                         vpif_obj.sd[i] = subdev;
1333                         return 0;
1334                 }
1335
1336         return -EINVAL;
1337 }
1338
1339 static int vpif_probe_complete(void)
1340 {
1341         struct common_obj *common;
1342         struct video_device *vdev;
1343         struct channel_obj *ch;
1344         struct vb2_queue *q;
1345         int j, err, k;
1346
1347         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1348                 ch = vpif_obj.dev[j];
1349                 ch->channel_id = j;
1350                 common = &(ch->common[VPIF_VIDEO_INDEX]);
1351                 spin_lock_init(&common->irqlock);
1352                 mutex_init(&common->lock);
1353
1354                 /* select input 0 */
1355                 err = vpif_set_input(vpif_obj.config, ch, 0);
1356                 if (err)
1357                         goto probe_out;
1358
1359                 /* set initial format */
1360                 ch->video.stdid = V4L2_STD_525_60;
1361                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1362                 vpif_update_std_info(ch);
1363
1364                 /* Initialize vb2 queue */
1365                 q = &common->buffer_queue;
1366                 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1367                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1368                 q->drv_priv = ch;
1369                 q->ops = &video_qops;
1370                 q->mem_ops = &vb2_dma_contig_memops;
1371                 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1372                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1373                 q->min_buffers_needed = 1;
1374                 q->lock = &common->lock;
1375
1376                 err = vb2_queue_init(q);
1377                 if (err) {
1378                         vpif_err("vpif_capture: vb2_queue_init() failed\n");
1379                         goto probe_out;
1380                 }
1381
1382                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1383                 if (IS_ERR(common->alloc_ctx)) {
1384                         vpif_err("Failed to get the context\n");
1385                         err = PTR_ERR(common->alloc_ctx);
1386                         goto probe_out;
1387                 }
1388
1389                 INIT_LIST_HEAD(&common->dma_queue);
1390
1391                 /* Initialize the video_device structure */
1392                 vdev = &ch->video_dev;
1393                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1394                 vdev->release = video_device_release_empty;
1395                 vdev->fops = &vpif_fops;
1396                 vdev->ioctl_ops = &vpif_ioctl_ops;
1397                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1398                 vdev->vfl_dir = VFL_DIR_RX;
1399                 vdev->queue = q;
1400                 vdev->lock = &common->lock;
1401                 video_set_drvdata(&ch->video_dev, ch);
1402                 err = video_register_device(vdev,
1403                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
1404                 if (err)
1405                         goto probe_out;
1406         }
1407
1408         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
1409         return 0;
1410
1411 probe_out:
1412         for (k = 0; k < j; k++) {
1413                 /* Get the pointer to the channel object */
1414                 ch = vpif_obj.dev[k];
1415                 common = &ch->common[k];
1416                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1417                 /* Unregister video device */
1418                 video_unregister_device(&ch->video_dev);
1419         }
1420         kfree(vpif_obj.sd);
1421         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1422
1423         return err;
1424 }
1425
1426 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1427 {
1428         return vpif_probe_complete();
1429 }
1430
1431 /**
1432  * vpif_probe : This function probes the vpif capture driver
1433  * @pdev: platform device pointer
1434  *
1435  * This creates device entries by register itself to the V4L2 driver and
1436  * initializes fields of each channel objects
1437  */
1438 static __init int vpif_probe(struct platform_device *pdev)
1439 {
1440         struct vpif_subdev_info *subdevdata;
1441         struct i2c_adapter *i2c_adap;
1442         struct resource *res;
1443         int subdev_count;
1444         int res_idx = 0;
1445         int i, err;
1446
1447         vpif_dev = &pdev->dev;
1448
1449         err = initialize_vpif();
1450         if (err) {
1451                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1452                 return err;
1453         }
1454
1455         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1456         if (err) {
1457                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1458                 return err;
1459         }
1460
1461         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1462                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1463                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1464                                         (void *)(&vpif_obj.dev[res_idx]->
1465                                         channel_id));
1466                 if (err) {
1467                         err = -EINVAL;
1468                         goto vpif_unregister;
1469                 }
1470                 res_idx++;
1471         }
1472
1473         vpif_obj.config = pdev->dev.platform_data;
1474
1475         subdev_count = vpif_obj.config->subdev_count;
1476         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1477                                 GFP_KERNEL);
1478         if (vpif_obj.sd == NULL) {
1479                 vpif_err("unable to allocate memory for subdevice pointers\n");
1480                 err = -ENOMEM;
1481                 goto vpif_unregister;
1482         }
1483
1484         if (!vpif_obj.config->asd_sizes) {
1485                 i2c_adap = i2c_get_adapter(1);
1486                 for (i = 0; i < subdev_count; i++) {
1487                         subdevdata = &vpif_obj.config->subdev_info[i];
1488                         vpif_obj.sd[i] =
1489                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1490                                                           i2c_adap,
1491                                                           &subdevdata->
1492                                                           board_info,
1493                                                           NULL);
1494
1495                         if (!vpif_obj.sd[i]) {
1496                                 vpif_err("Error registering v4l2 subdevice\n");
1497                                 err = -ENODEV;
1498                                 goto probe_subdev_out;
1499                         }
1500                         v4l2_info(&vpif_obj.v4l2_dev,
1501                                   "registered sub device %s\n",
1502                                    subdevdata->name);
1503                 }
1504                 vpif_probe_complete();
1505         } else {
1506                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1507                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1508                 vpif_obj.notifier.bound = vpif_async_bound;
1509                 vpif_obj.notifier.complete = vpif_async_complete;
1510                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1511                                                    &vpif_obj.notifier);
1512                 if (err) {
1513                         vpif_err("Error registering async notifier\n");
1514                         err = -EINVAL;
1515                         goto probe_subdev_out;
1516                 }
1517         }
1518
1519         return 0;
1520
1521 probe_subdev_out:
1522         /* free sub devices memory */
1523         kfree(vpif_obj.sd);
1524 vpif_unregister:
1525         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1526
1527         return err;
1528 }
1529
1530 /**
1531  * vpif_remove() - driver remove handler
1532  * @device: ptr to platform device structure
1533  *
1534  * The vidoe device is unregistered
1535  */
1536 static int vpif_remove(struct platform_device *device)
1537 {
1538         struct common_obj *common;
1539         struct channel_obj *ch;
1540         int i;
1541
1542         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1543
1544         kfree(vpif_obj.sd);
1545         /* un-register device */
1546         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1547                 /* Get the pointer to the channel object */
1548                 ch = vpif_obj.dev[i];
1549                 common = &ch->common[VPIF_VIDEO_INDEX];
1550                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1551                 /* Unregister video device */
1552                 video_unregister_device(&ch->video_dev);
1553                 kfree(vpif_obj.dev[i]);
1554         }
1555         return 0;
1556 }
1557
1558 #ifdef CONFIG_PM_SLEEP
1559 /**
1560  * vpif_suspend: vpif device suspend
1561  */
1562 static int vpif_suspend(struct device *dev)
1563 {
1564
1565         struct common_obj *common;
1566         struct channel_obj *ch;
1567         int i;
1568
1569         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1570                 /* Get the pointer to the channel object */
1571                 ch = vpif_obj.dev[i];
1572                 common = &ch->common[VPIF_VIDEO_INDEX];
1573
1574                 if (!vb2_start_streaming_called(&common->buffer_queue))
1575                         continue;
1576
1577                 mutex_lock(&common->lock);
1578                 /* Disable channel */
1579                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1580                         enable_channel0(0);
1581                         channel0_intr_enable(0);
1582                 }
1583                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1584                         ycmux_mode == 2) {
1585                         enable_channel1(0);
1586                         channel1_intr_enable(0);
1587                 }
1588                 mutex_unlock(&common->lock);
1589         }
1590
1591         return 0;
1592 }
1593
1594 /*
1595  * vpif_resume: vpif device suspend
1596  */
1597 static int vpif_resume(struct device *dev)
1598 {
1599         struct common_obj *common;
1600         struct channel_obj *ch;
1601         int i;
1602
1603         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1604                 /* Get the pointer to the channel object */
1605                 ch = vpif_obj.dev[i];
1606                 common = &ch->common[VPIF_VIDEO_INDEX];
1607
1608                 if (!vb2_start_streaming_called(&common->buffer_queue))
1609                         continue;
1610
1611                 mutex_lock(&common->lock);
1612                 /* Enable channel */
1613                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1614                         enable_channel0(1);
1615                         channel0_intr_enable(1);
1616                 }
1617                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1618                         ycmux_mode == 2) {
1619                         enable_channel1(1);
1620                         channel1_intr_enable(1);
1621                 }
1622                 mutex_unlock(&common->lock);
1623         }
1624
1625         return 0;
1626 }
1627 #endif
1628
1629 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1630
1631 static __refdata struct platform_driver vpif_driver = {
1632         .driver = {
1633                 .name   = VPIF_DRIVER_NAME,
1634                 .pm     = &vpif_pm_ops,
1635         },
1636         .probe = vpif_probe,
1637         .remove = vpif_remove,
1638 };
1639
1640 module_platform_driver(vpif_driver);