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 static u32 ch0_numbuffers = 3;
  43 static u32 ch1_numbuffers = 3;
  44 static u32 ch0_bufsize = 1920 * 1080 * 2;
  45 static u32 ch1_bufsize = 720 * 576 * 2;
  46
  47 module_param(debug, int, 0644);
  48 module_param(ch0_numbuffers, uint, S_IRUGO);
  49 module_param(ch1_numbuffers, uint, S_IRUGO);
  50 module_param(ch0_bufsize, uint, S_IRUGO);
  51 module_param(ch1_bufsize, uint, S_IRUGO);
  52
  53 MODULE_PARM_DESC(debug, "Debug level 0-1");
  54 MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
  55 MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
  56 MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
  57 MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
  58
  59 static struct vpif_config_params config_params = {
  60         .min_numbuffers = 3,
  61         .numbuffers[0] = 3,
  62         .numbuffers[1] = 3,
  63         .min_bufsize[0] = 720 * 480 * 2,
  64         .min_bufsize[1] = 720 * 480 * 2,
  65         .channel_bufsize[0] = 1920 * 1080 * 2,
  66         .channel_bufsize[1] = 720 * 576 * 2,
  67 };
  68
  69 #define VPIF_DRIVER_NAME        "vpif_capture"
  70
  71 /* global variables */
  72 static struct vpif_device vpif_obj = { {NULL} };
  73 static struct device *vpif_dev;
  74 static void vpif_calculate_offsets(struct channel_obj *ch);
  75 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  76
  77 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = { {1, 1} };
  78
  79 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
  80 static int ycmux_mode;
  81
  82 static inline struct vpif_cap_buffer *to_vpif_buffer(struct vb2_buffer *vb)
  83 {
  84         return container_of(vb, struct vpif_cap_buffer, vb);
  85 }
  86
  87 /**
  88  * vpif_buffer_prepare :  callback function for buffer prepare
  89  * @vb: ptr to vb2_buffer
  90  *
  91  * This is the callback function for buffer prepare when vb2_qbuf()
  92  * function is called. The buffer is prepared and user space virtual address
  93  * or user address is converted into  physical address
  94  */
  95 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  96 {
  97         struct vb2_queue *q = vb->vb2_queue;
  98         struct channel_obj *ch = vb2_get_drv_priv(q);
  99         struct common_obj *common;
 100         unsigned long addr;
 101
 102         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
 103
 104         common = &ch->common[VPIF_VIDEO_INDEX];
 105
 106         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 107         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 108                 return -EINVAL;
 109
 110         vb->v4l2_buf.field = common->fmt.fmt.pix.field;
 111
 112         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 113         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 114                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 115                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
 116                 !IS_ALIGNED((addr + common->cbtm_off), 8)) {
 117                 vpif_dbg(1, debug, "offset is not aligned\n");
 118                 return -EINVAL;
 119         }
 120
 121         return 0;
 122 }
 123
 124 /**
 125  * vpif_buffer_queue_setup : Callback function for buffer setup.
 126  * @vq: vb2_queue ptr
 127  * @fmt: v4l2 format
 128  * @nbuffers: ptr to number of buffers requested by application
 129  * @nplanes:: contains number of distinct video planes needed to hold a frame
 130  * @sizes[]: contains the size (in bytes) of each plane.
 131  * @alloc_ctxs: ptr to allocation context
 132  *
 133  * This callback function is called when reqbuf() is called to adjust
 134  * the buffer count and buffer size
 135  */
 136 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 137                                 const struct v4l2_format *fmt,
 138                                 unsigned int *nbuffers, unsigned int *nplanes,
 139                                 unsigned int sizes[], void *alloc_ctxs[])
 140 {
 141         struct channel_obj *ch = vb2_get_drv_priv(vq);
 142         struct common_obj *common;
 143
 144         common = &ch->common[VPIF_VIDEO_INDEX];
 145
 146         vpif_dbg(2, debug, "vpif_buffer_setup\n");
 147
 148         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
 149                 return -EINVAL;
 150
 151         if (vq->num_buffers + *nbuffers < 3)
 152                 *nbuffers = 3 - vq->num_buffers;
 153
 154         *nplanes = 1;
 155         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
 156         alloc_ctxs[0] = common->alloc_ctx;
 157
 158         /* Calculate the offset for Y and C data in the buffer */
 159         vpif_calculate_offsets(ch);
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 166  * @vb: ptr to vb2_buffer
 167  */
 168 static void vpif_buffer_queue(struct vb2_buffer *vb)
 169 {
 170         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 171         struct vpif_cap_buffer *buf = to_vpif_buffer(vb);
 172         struct common_obj *common;
 173         unsigned long flags;
 174
 175         common = &ch->common[VPIF_VIDEO_INDEX];
 176
 177         vpif_dbg(2, debug, "vpif_buffer_queue\n");
 178
 179         spin_lock_irqsave(&common->irqlock, flags);
 180         /* add the buffer to the DMA queue */
 181         list_add_tail(&buf->list, &common->dma_queue);
 182         spin_unlock_irqrestore(&common->irqlock, flags);
 183 }
 184
 185 /**
 186  * vpif_start_streaming : Starts the DMA engine for streaming
 187  * @vb: ptr to vb2_buffer
 188  * @count: number of buffers
 189  */
 190 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 191 {
 192         struct vpif_capture_config *vpif_config_data =
 193                                         vpif_dev->platform_data;
 194         struct channel_obj *ch = vb2_get_drv_priv(vq);
 195         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 196         struct vpif_params *vpif = &ch->vpifparams;
 197         struct vpif_cap_buffer *buf, *tmp;
 198         unsigned long addr, flags;
 199         int ret;
 200
 201         spin_lock_irqsave(&common->irqlock, flags);
 202
 203         /* Initialize field_id */
 204         ch->field_id = 0;
 205
 206         /* configure 1 or 2 channel mode */
 207         if (vpif_config_data->setup_input_channel_mode) {
 208                 ret = vpif_config_data->
 209                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
 210                 if (ret < 0) {
 211                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
 212                         goto err;
 213                 }
 214         }
 215
 216         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
 217         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
 218                 vpif_dbg(1, debug, "stream on failed in subdev\n");
 219                 goto err;
 220         }
 221
 222         /* Call vpif_set_params function to set the parameters and addresses */
 223         ret = vpif_set_video_params(vpif, ch->channel_id);
 224         if (ret < 0) {
 225                 vpif_dbg(1, debug, "can't set video params\n");
 226                 goto err;
 227         }
 228
 229         ycmux_mode = ret;
 230         vpif_config_addr(ch, ret);
 231
 232         /* Get the next frame from the buffer queue */
 233         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
 234                                     struct vpif_cap_buffer, list);
 235         /* Remove buffer from the buffer queue */
 236         list_del(&common->cur_frm->list);
 237         spin_unlock_irqrestore(&common->irqlock, flags);
 238         /* Mark state of the current frame to active */
 239         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 240
 241         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 242
 243         common->set_addr(addr + common->ytop_off,
 244                          addr + common->ybtm_off,
 245                          addr + common->ctop_off,
 246                          addr + common->cbtm_off);
 247
 248         /**
 249          * Set interrupt for both the fields in VPIF Register enable channel in
 250          * VPIF register
 251          */
 252         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 253         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 254                 channel0_intr_assert();
 255                 channel0_intr_enable(1);
 256                 enable_channel0(1);
 257         }
 258         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
 259                 ycmux_mode == 2) {
 260                 channel1_intr_assert();
 261                 channel1_intr_enable(1);
 262                 enable_channel1(1);
 263         }
 264
 265         return 0;
 266
 267 err:
 268         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
 269                 list_del(&buf->list);
 270                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 271         }
 272         spin_unlock_irqrestore(&common->irqlock, flags);
 273
 274         return ret;
 275 }
 276
 277 /**
 278  * vpif_stop_streaming : Stop the DMA engine
 279  * @vq: ptr to vb2_queue
 280  *
 281  * This callback stops the DMA engine and any remaining buffers
 282  * in the DMA queue are released.
 283  */
 284 static void vpif_stop_streaming(struct vb2_queue *vq)
 285 {
 286         struct channel_obj *ch = vb2_get_drv_priv(vq);
 287         struct common_obj *common;
 288         unsigned long flags;
 289         int ret;
 290
 291         common = &ch->common[VPIF_VIDEO_INDEX];
 292
 293         /* Disable channel as per its device type and channel id */
 294         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
 295                 enable_channel0(0);
 296                 channel0_intr_enable(0);
 297         }
 298         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
 299                 ycmux_mode == 2) {
 300                 enable_channel1(0);
 301                 channel1_intr_enable(0);
 302         }
 303
 304         ycmux_mode = 0;
 305
 306         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
 307         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
 308                 vpif_dbg(1, debug, "stream off failed in subdev\n");
 309
 310         /* release all active buffers */
 311         spin_lock_irqsave(&common->irqlock, flags);
 312         if (common->cur_frm == common->next_frm) {
 313                 vb2_buffer_done(&common->cur_frm->vb, VB2_BUF_STATE_ERROR);
 314         } else {
 315                 if (common->cur_frm != NULL)
 316                         vb2_buffer_done(&common->cur_frm->vb,
 317                                         VB2_BUF_STATE_ERROR);
 318                 if (common->next_frm != NULL)
 319                         vb2_buffer_done(&common->next_frm->vb,
 320                                         VB2_BUF_STATE_ERROR);
 321         }
 322
 323         while (!list_empty(&common->dma_queue)) {
 324                 common->next_frm = list_entry(common->dma_queue.next,
 325                                                 struct vpif_cap_buffer, list);
 326                 list_del(&common->next_frm->list);
 327                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 328         }
 329         spin_unlock_irqrestore(&common->irqlock, flags);
 330 }
 331
 332 static struct vb2_ops video_qops = {
 333         .queue_setup            = vpif_buffer_queue_setup,
 334         .buf_prepare            = vpif_buffer_prepare,
 335         .start_streaming        = vpif_start_streaming,
 336         .stop_streaming         = vpif_stop_streaming,
 337         .buf_queue              = vpif_buffer_queue,
 338 };
 339
 340 /**
 341  * vpif_process_buffer_complete: process a completed buffer
 342  * @common: ptr to common channel object
 343  *
 344  * This function time stamp the buffer and mark it as DONE. It also
 345  * wake up any process waiting on the QUEUE and set the next buffer
 346  * as current
 347  */
 348 static void vpif_process_buffer_complete(struct common_obj *common)
 349 {
 350         v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 351         vb2_buffer_done(&common->cur_frm->vb,
 352                                             VB2_BUF_STATE_DONE);
 353         /* Make curFrm pointing to nextFrm */
 354         common->cur_frm = common->next_frm;
 355 }
 356
 357 /**
 358  * vpif_schedule_next_buffer: set next buffer address for capture
 359  * @common : ptr to common channel object
 360  *
 361  * This function will get next buffer from the dma queue and
 362  * set the buffer address in the vpif register for capture.
 363  * the buffer is marked active
 364  */
 365 static void vpif_schedule_next_buffer(struct common_obj *common)
 366 {
 367         unsigned long addr = 0;
 368
 369         spin_lock(&common->irqlock);
 370         common->next_frm = list_entry(common->dma_queue.next,
 371                                      struct vpif_cap_buffer, list);
 372         /* Remove that buffer from the buffer queue */
 373         list_del(&common->next_frm->list);
 374         spin_unlock(&common->irqlock);
 375         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 376         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 377
 378         /* Set top and bottom field addresses in VPIF registers */
 379         common->set_addr(addr + common->ytop_off,
 380                          addr + common->ybtm_off,
 381                          addr + common->ctop_off,
 382                          addr + common->cbtm_off);
 383 }
 384
 385 /**
 386  * vpif_channel_isr : ISR handler for vpif capture
 387  * @irq: irq number
 388  * @dev_id: dev_id ptr
 389  *
 390  * It changes status of the captured buffer, takes next buffer from the queue
 391  * and sets its address in VPIF registers
 392  */
 393 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 394 {
 395         struct vpif_device *dev = &vpif_obj;
 396         struct common_obj *common;
 397         struct channel_obj *ch;
 398         enum v4l2_field field;
 399         int channel_id = 0;
 400         int fid = -1, i;
 401
 402         channel_id = *(int *)(dev_id);
 403         if (!vpif_intr_status(channel_id))
 404                 return IRQ_NONE;
 405
 406         ch = dev->dev[channel_id];
 407
 408         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 409
 410         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
 411                 common = &ch->common[i];
 412                 /* skip If streaming is not started in this channel */
 413                 /* Check the field format */
 414                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 415                         /* Progressive mode */
 416                         spin_lock(&common->irqlock);
 417                         if (list_empty(&common->dma_queue)) {
 418                                 spin_unlock(&common->irqlock);
 419                                 continue;
 420                         }
 421                         spin_unlock(&common->irqlock);
 422
 423                         if (!channel_first_int[i][channel_id])
 424                                 vpif_process_buffer_complete(common);
 425
 426                         channel_first_int[i][channel_id] = 0;
 427
 428                         vpif_schedule_next_buffer(common);
 429
 430
 431                         channel_first_int[i][channel_id] = 0;
 432                 } else {
 433                         /**
 434                          * Interlaced mode. If it is first interrupt, ignore
 435                          * it
 436                          */
 437                         if (channel_first_int[i][channel_id]) {
 438                                 channel_first_int[i][channel_id] = 0;
 439                                 continue;
 440                         }
 441                         if (0 == i) {
 442                                 ch->field_id ^= 1;
 443                                 /* Get field id from VPIF registers */
 444                                 fid = vpif_channel_getfid(ch->channel_id);
 445                                 if (fid != ch->field_id) {
 446                                         /**
 447                                          * If field id does not match stored
 448                                          * field id, make them in sync
 449                                          */
 450                                         if (0 == fid)
 451                                                 ch->field_id = fid;
 452                                         return IRQ_HANDLED;
 453                                 }
 454                         }
 455                         /* device field id and local field id are in sync */
 456                         if (0 == fid) {
 457                                 /* this is even field */
 458                                 if (common->cur_frm == common->next_frm)
 459                                         continue;
 460
 461                                 /* mark the current buffer as done */
 462                                 vpif_process_buffer_complete(common);
 463                         } else if (1 == fid) {
 464                                 /* odd field */
 465                                 spin_lock(&common->irqlock);
 466                                 if (list_empty(&common->dma_queue) ||
 467                                     (common->cur_frm != common->next_frm)) {
 468                                         spin_unlock(&common->irqlock);
 469                                         continue;
 470                                 }
 471                                 spin_unlock(&common->irqlock);
 472
 473                                 vpif_schedule_next_buffer(common);
 474                         }
 475                 }
 476         }
 477         return IRQ_HANDLED;
 478 }
 479
 480 /**
 481  * vpif_update_std_info() - update standard related info
 482  * @ch: ptr to channel object
 483  *
 484  * For a given standard selected by application, update values
 485  * in the device data structures
 486  */
 487 static int vpif_update_std_info(struct channel_obj *ch)
 488 {
 489         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 490         struct vpif_params *vpifparams = &ch->vpifparams;
 491         const struct vpif_channel_config_params *config;
 492         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 493         struct video_obj *vid_ch = &ch->video;
 494         int index;
 495
 496         vpif_dbg(2, debug, "vpif_update_std_info\n");
 497
 498         for (index = 0; index < vpif_ch_params_count; index++) {
 499                 config = &vpif_ch_params[index];
 500                 if (config->hd_sd == 0) {
 501                         vpif_dbg(2, debug, "SD format\n");
 502                         if (config->stdid & vid_ch->stdid) {
 503                                 memcpy(std_info, config, sizeof(*config));
 504                                 break;
 505                         }
 506                 } else {
 507                         vpif_dbg(2, debug, "HD format\n");
 508                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
 509                                 sizeof(vid_ch->dv_timings))) {
 510                                 memcpy(std_info, config, sizeof(*config));
 511                                 break;
 512                         }
 513                 }
 514         }
 515
 516         /* standard not found */
 517         if (index == vpif_ch_params_count)
 518                 return -EINVAL;
 519
 520         common->fmt.fmt.pix.width = std_info->width;
 521         common->width = std_info->width;
 522         common->fmt.fmt.pix.height = std_info->height;
 523         common->height = std_info->height;
 524         common->fmt.fmt.pix.bytesperline = std_info->width;
 525         vpifparams->video_params.hpitch = std_info->width;
 526         vpifparams->video_params.storage_mode = std_info->frm_fmt;
 527
 528         return 0;
 529 }
 530
 531 /**
 532  * vpif_calculate_offsets : This function calculates buffers offsets
 533  * @ch : ptr to channel object
 534  *
 535  * This function calculates buffer offsets for Y and C in the top and
 536  * bottom field
 537  */
 538 static void vpif_calculate_offsets(struct channel_obj *ch)
 539 {
 540         unsigned int hpitch, vpitch, sizeimage;
 541         struct video_obj *vid_ch = &(ch->video);
 542         struct vpif_params *vpifparams = &ch->vpifparams;
 543         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 544         enum v4l2_field field = common->fmt.fmt.pix.field;
 545
 546         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
 547
 548         if (V4L2_FIELD_ANY == field) {
 549                 if (vpifparams->std_info.frm_fmt)
 550                         vid_ch->buf_field = V4L2_FIELD_NONE;
 551                 else
 552                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 553         } else
 554                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 555
 556         sizeimage = common->fmt.fmt.pix.sizeimage;
 557
 558         hpitch = common->fmt.fmt.pix.bytesperline;
 559         vpitch = sizeimage / (hpitch * 2);
 560
 561         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 562             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 563                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 564                 common->ytop_off = 0;
 565                 common->ybtm_off = hpitch;
 566                 common->ctop_off = sizeimage / 2;
 567                 common->cbtm_off = sizeimage / 2 + hpitch;
 568         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 569                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 570                 common->ytop_off = 0;
 571                 common->ybtm_off = sizeimage / 4;
 572                 common->ctop_off = sizeimage / 2;
 573                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 574         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 575                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
 576                 common->ybtm_off = 0;
 577                 common->ytop_off = sizeimage / 4;
 578                 common->cbtm_off = sizeimage / 2;
 579                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 580         }
 581         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 582             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
 583                 vpifparams->video_params.storage_mode = 1;
 584         else
 585                 vpifparams->video_params.storage_mode = 0;
 586
 587         if (1 == vpifparams->std_info.frm_fmt)
 588                 vpifparams->video_params.hpitch =
 589                     common->fmt.fmt.pix.bytesperline;
 590         else {
 591                 if ((field == V4L2_FIELD_ANY)
 592                     || (field == V4L2_FIELD_INTERLACED))
 593                         vpifparams->video_params.hpitch =
 594                             common->fmt.fmt.pix.bytesperline * 2;
 595                 else
 596                         vpifparams->video_params.hpitch =
 597                             common->fmt.fmt.pix.bytesperline;
 598         }
 599
 600         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
 601 }
 602
 603 /**
 604  * vpif_config_format: configure default frame format in the device
 605  * ch : ptr to channel object
 606  */
 607 static void vpif_config_format(struct channel_obj *ch)
 608 {
 609         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 610
 611         vpif_dbg(2, debug, "vpif_config_format\n");
 612
 613         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 614         common->fmt.fmt.pix.sizeimage
 615             = config_params.channel_bufsize[ch->channel_id];
 616
 617         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
 618                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
 619         else
 620                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 621         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 622 }
 623
 624 /**
 625  * vpif_get_default_field() - Get default field type based on interface
 626  * @vpif_params - ptr to vpif params
 627  */
 628 static inline enum v4l2_field vpif_get_default_field(
 629                                 struct vpif_interface *iface)
 630 {
 631         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
 632                                                 V4L2_FIELD_INTERLACED;
 633 }
 634
 635 /**
 636  * vpif_check_format()  - check given pixel format for compatibility
 637  * @ch - channel  ptr
 638  * @pixfmt - Given pixel format
 639  * @update - update the values as per hardware requirement
 640  *
 641  * Check the application pixel format for S_FMT and update the input
 642  * values as per hardware limits for TRY_FMT. The default pixel and
 643  * field format is selected based on interface type.
 644  */
 645 static int vpif_check_format(struct channel_obj *ch,
 646                              struct v4l2_pix_format *pixfmt,
 647                              int update)
 648 {
 649         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 650         struct vpif_params *vpif_params = &ch->vpifparams;
 651         enum v4l2_field field = pixfmt->field;
 652         u32 sizeimage, hpitch, vpitch;
 653         int ret = -EINVAL;
 654
 655         vpif_dbg(2, debug, "vpif_check_format\n");
 656         /**
 657          * first check for the pixel format. If if_type is Raw bayer,
 658          * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
 659          * V4L2_PIX_FMT_YUV422P is supported
 660          */
 661         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
 662                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
 663                         if (!update) {
 664                                 vpif_dbg(2, debug, "invalid pix format\n");
 665                                 goto exit;
 666                         }
 667                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
 668                 }
 669         } else {
 670                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
 671                         if (!update) {
 672                                 vpif_dbg(2, debug, "invalid pixel format\n");
 673                                 goto exit;
 674                         }
 675                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 676                 }
 677         }
 678
 679         if (!(VPIF_VALID_FIELD(field))) {
 680                 if (!update) {
 681                         vpif_dbg(2, debug, "invalid field format\n");
 682                         goto exit;
 683                 }
 684                 /**
 685                  * By default use FIELD_NONE for RAW Bayer capture
 686                  * and FIELD_INTERLACED for other interfaces
 687                  */
 688                 field = vpif_get_default_field(&vpif_params->iface);
 689         } else if (field == V4L2_FIELD_ANY)
 690                 /* unsupported field. Use default */
 691                 field = vpif_get_default_field(&vpif_params->iface);
 692
 693         /* validate the hpitch */
 694         hpitch = pixfmt->bytesperline;
 695         if (hpitch < vpif_params->std_info.width) {
 696                 if (!update) {
 697                         vpif_dbg(2, debug, "invalid hpitch\n");
 698                         goto exit;
 699                 }
 700                 hpitch = vpif_params->std_info.width;
 701         }
 702
 703         sizeimage = pixfmt->sizeimage;
 704
 705         vpitch = sizeimage / (hpitch * 2);
 706
 707         /* validate the vpitch */
 708         if (vpitch < vpif_params->std_info.height) {
 709                 if (!update) {
 710                         vpif_dbg(2, debug, "Invalid vpitch\n");
 711                         goto exit;
 712                 }
 713                 vpitch = vpif_params->std_info.height;
 714         }
 715
 716         /* Check for 8 byte alignment */
 717         if (!ALIGN(hpitch, 8)) {
 718                 if (!update) {
 719                         vpif_dbg(2, debug, "invalid pitch alignment\n");
 720                         goto exit;
 721                 }
 722                 /* adjust to next 8 byte boundary */
 723                 hpitch = (((hpitch + 7) / 8) * 8);
 724         }
 725         /* if update is set, modify the bytesperline and sizeimage */
 726         if (update) {
 727                 pixfmt->bytesperline = hpitch;
 728                 pixfmt->sizeimage = hpitch * vpitch * 2;
 729         }
 730         /**
 731          * Image width and height is always based on current standard width and
 732          * height
 733          */
 734         pixfmt->width = common->fmt.fmt.pix.width;
 735         pixfmt->height = common->fmt.fmt.pix.height;
 736         return 0;
 737 exit:
 738         return ret;
 739 }
 740
 741 /**
 742  * vpif_config_addr() - function to configure buffer address in vpif
 743  * @ch - channel ptr
 744  * @muxmode - channel mux mode
 745  */
 746 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 747 {
 748         struct common_obj *common;
 749
 750         vpif_dbg(2, debug, "vpif_config_addr\n");
 751
 752         common = &(ch->common[VPIF_VIDEO_INDEX]);
 753
 754         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
 755                 common->set_addr = ch1_set_videobuf_addr;
 756         else if (2 == muxmode)
 757                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
 758         else
 759                 common->set_addr = ch0_set_videobuf_addr;
 760 }
 761
 762 /**
 763  * vpif_input_to_subdev() - Maps input to sub device
 764  * @vpif_cfg - global config ptr
 765  * @chan_cfg - channel config ptr
 766  * @input_index - Given input index from application
 767  *
 768  * lookup the sub device information for a given input index.
 769  * we report all the inputs to application. inputs table also
 770  * has sub device name for the each input
 771  */
 772 static int vpif_input_to_subdev(
 773                 struct vpif_capture_config *vpif_cfg,
 774                 struct vpif_capture_chan_config *chan_cfg,
 775                 int input_index)
 776 {
 777         struct vpif_subdev_info *subdev_info;
 778         const char *subdev_name;
 779         int i;
 780
 781         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
 782
 783         subdev_name = chan_cfg->inputs[input_index].subdev_name;
 784         if (subdev_name == NULL)
 785                 return -1;
 786
 787         /* loop through the sub device list to get the sub device info */
 788         for (i = 0; i < vpif_cfg->subdev_count; i++) {
 789                 subdev_info = &vpif_cfg->subdev_info[i];
 790                 if (!strcmp(subdev_info->name, subdev_name))
 791                         return i;
 792         }
 793         return -1;
 794 }
 795
 796 /**
 797  * vpif_set_input() - Select an input
 798  * @vpif_cfg - global config ptr
 799  * @ch - channel
 800  * @_index - Given input index from application
 801  *
 802  * Select the given input.
 803  */
 804 static int vpif_set_input(
 805                 struct vpif_capture_config *vpif_cfg,
 806                 struct channel_obj *ch,
 807                 int index)
 808 {
 809         struct vpif_capture_chan_config *chan_cfg =
 810                         &vpif_cfg->chan_config[ch->channel_id];
 811         struct vpif_subdev_info *subdev_info = NULL;
 812         struct v4l2_subdev *sd = NULL;
 813         u32 input = 0, output = 0;
 814         int sd_index;
 815         int ret;
 816
 817         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
 818         if (sd_index >= 0) {
 819                 sd = vpif_obj.sd[sd_index];
 820                 subdev_info = &vpif_cfg->subdev_info[sd_index];
 821         }
 822
 823         /* first setup input path from sub device to vpif */
 824         if (sd && vpif_cfg->setup_input_path) {
 825                 ret = vpif_cfg->setup_input_path(ch->channel_id,
 826                                        subdev_info->name);
 827                 if (ret < 0) {
 828                         vpif_dbg(1, debug, "couldn't setup input path for the" \
 829                         " sub device %s, for input index %d\n",
 830                         subdev_info->name, index);
 831                         return ret;
 832                 }
 833         }
 834
 835         if (sd) {
 836                 input = chan_cfg->inputs[index].input_route;
 837                 output = chan_cfg->inputs[index].output_route;
 838                 ret = v4l2_subdev_call(sd, video, s_routing,
 839                                 input, output, 0);
 840                 if (ret < 0 && ret != -ENOIOCTLCMD) {
 841                         vpif_dbg(1, debug, "Failed to set input\n");
 842                         return ret;
 843                 }
 844         }
 845         ch->input_idx = index;
 846         ch->sd = sd;
 847         /* copy interface parameters to vpif */
 848         ch->vpifparams.iface = chan_cfg->vpif_if;
 849
 850         /* update tvnorms from the sub device input info */
 851         ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
 852         return 0;
 853 }
 854
 855 /**
 856  * vpif_querystd() - querystd handler
 857  * @file: file ptr
 858  * @priv: file handle
 859  * @std_id: ptr to std id
 860  *
 861  * This function is called to detect standard at the selected input
 862  */
 863 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 864 {
 865         struct video_device *vdev = video_devdata(file);
 866         struct channel_obj *ch = video_get_drvdata(vdev);
 867         int ret = 0;
 868
 869         vpif_dbg(2, debug, "vpif_querystd\n");
 870
 871         /* Call querystd function of decoder device */
 872         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
 873
 874         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 875                 return -ENODATA;
 876         if (ret) {
 877                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
 878                 return ret;
 879         }
 880
 881         return 0;
 882 }
 883
 884 /**
 885  * vpif_g_std() - get STD handler
 886  * @file: file ptr
 887  * @priv: file handle
 888  * @std_id: ptr to std id
 889  */
 890 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
 891 {
 892         struct vpif_capture_config *config = vpif_dev->platform_data;
 893         struct video_device *vdev = video_devdata(file);
 894         struct channel_obj *ch = video_get_drvdata(vdev);
 895         struct vpif_capture_chan_config *chan_cfg;
 896         struct v4l2_input input;
 897
 898         vpif_dbg(2, debug, "vpif_g_std\n");
 899
 900         if (config->chan_config[ch->channel_id].inputs == NULL)
 901                 return -ENODATA;
 902
 903         chan_cfg = &config->chan_config[ch->channel_id];
 904         input = chan_cfg->inputs[ch->input_idx].input;
 905         if (input.capabilities != V4L2_IN_CAP_STD)
 906                 return -ENODATA;
 907
 908         *std = ch->video.stdid;
 909         return 0;
 910 }
 911
 912 /**
 913  * vpif_s_std() - set STD handler
 914  * @file: file ptr
 915  * @priv: file handle
 916  * @std_id: ptr to std id
 917  */
 918 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 919 {
 920         struct vpif_capture_config *config = vpif_dev->platform_data;
 921         struct video_device *vdev = video_devdata(file);
 922         struct channel_obj *ch = video_get_drvdata(vdev);
 923         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 924         struct vpif_capture_chan_config *chan_cfg;
 925         struct v4l2_input input;
 926         int ret;
 927
 928         vpif_dbg(2, debug, "vpif_s_std\n");
 929
 930         if (config->chan_config[ch->channel_id].inputs == NULL)
 931                 return -ENODATA;
 932
 933         chan_cfg = &config->chan_config[ch->channel_id];
 934         input = chan_cfg->inputs[ch->input_idx].input;
 935         if (input.capabilities != V4L2_IN_CAP_STD)
 936                 return -ENODATA;
 937
 938         if (vb2_is_busy(&common->buffer_queue))
 939                 return -EBUSY;
 940
 941         /* Call encoder subdevice function to set the standard */
 942         ch->video.stdid = std_id;
 943         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
 944
 945         /* Get the information about the standard */
 946         if (vpif_update_std_info(ch)) {
 947                 vpif_err("Error getting the standard info\n");
 948                 return -EINVAL;
 949         }
 950
 951         /* Configure the default format information */
 952         vpif_config_format(ch);
 953
 954         /* set standard in the sub device */
 955         ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
 956         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
 957                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
 958                 return ret;
 959         }
 960         return 0;
 961 }
 962
 963 /**
 964  * vpif_enum_input() - ENUMINPUT handler
 965  * @file: file ptr
 966  * @priv: file handle
 967  * @input: ptr to input structure
 968  */
 969 static int vpif_enum_input(struct file *file, void *priv,
 970                                 struct v4l2_input *input)
 971 {
 972
 973         struct vpif_capture_config *config = vpif_dev->platform_data;
 974         struct video_device *vdev = video_devdata(file);
 975         struct channel_obj *ch = video_get_drvdata(vdev);
 976         struct vpif_capture_chan_config *chan_cfg;
 977
 978         chan_cfg = &config->chan_config[ch->channel_id];
 979
 980         if (input->index >= chan_cfg->input_count) {
 981                 vpif_dbg(1, debug, "Invalid input index\n");
 982                 return -EINVAL;
 983         }
 984
 985         memcpy(input, &chan_cfg->inputs[input->index].input,
 986                 sizeof(*input));
 987         return 0;
 988 }
 989
 990 /**
 991  * vpif_g_input() - Get INPUT handler
 992  * @file: file ptr
 993  * @priv: file handle
 994  * @index: ptr to input index
 995  */
 996 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
 997 {
 998         struct video_device *vdev = video_devdata(file);
 999         struct channel_obj *ch = video_get_drvdata(vdev);
1000
1001         *index = ch->input_idx;
1002         return 0;
1003 }
1004
1005 /**
1006  * vpif_s_input() - Set INPUT handler
1007  * @file: file ptr
1008  * @priv: file handle
1009  * @index: input index
1010  */
1011 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1012 {
1013         struct vpif_capture_config *config = vpif_dev->platform_data;
1014         struct video_device *vdev = video_devdata(file);
1015         struct channel_obj *ch = video_get_drvdata(vdev);
1016         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1017         struct vpif_capture_chan_config *chan_cfg;
1018
1019         chan_cfg = &config->chan_config[ch->channel_id];
1020
1021         if (index >= chan_cfg->input_count)
1022                 return -EINVAL;
1023
1024         if (vb2_is_busy(&common->buffer_queue))
1025                 return -EBUSY;
1026
1027         return vpif_set_input(config, ch, index);
1028 }
1029
1030 /**
1031  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1032  * @file: file ptr
1033  * @priv: file handle
1034  * @index: input index
1035  */
1036 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
1037                                         struct v4l2_fmtdesc *fmt)
1038 {
1039         struct video_device *vdev = video_devdata(file);
1040         struct channel_obj *ch = video_get_drvdata(vdev);
1041
1042         if (fmt->index != 0) {
1043                 vpif_dbg(1, debug, "Invalid format index\n");
1044                 return -EINVAL;
1045         }
1046
1047         /* Fill in the information about format */
1048         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1049                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1050                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1051                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1052         } else {
1053                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1054                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1055                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1056         }
1057         return 0;
1058 }
1059
1060 /**
1061  * vpif_try_fmt_vid_cap() - TRY_FMT handler
1062  * @file: file ptr
1063  * @priv: file handle
1064  * @fmt: ptr to v4l2 format structure
1065  */
1066 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1067                                 struct v4l2_format *fmt)
1068 {
1069         struct video_device *vdev = video_devdata(file);
1070         struct channel_obj *ch = video_get_drvdata(vdev);
1071         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1072
1073         return vpif_check_format(ch, pixfmt, 1);
1074 }
1075
1076
1077 /**
1078  * vpif_g_fmt_vid_cap() - Set INPUT handler
1079  * @file: file ptr
1080  * @priv: file handle
1081  * @fmt: ptr to v4l2 format structure
1082  */
1083 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1084                                 struct v4l2_format *fmt)
1085 {
1086         struct video_device *vdev = video_devdata(file);
1087         struct channel_obj *ch = video_get_drvdata(vdev);
1088         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1089
1090         /* Check the validity of the buffer type */
1091         if (common->fmt.type != fmt->type)
1092                 return -EINVAL;
1093
1094         /* Fill in the information about format */
1095         *fmt = common->fmt;
1096         return 0;
1097 }
1098
1099 /**
1100  * vpif_s_fmt_vid_cap() - Set FMT handler
1101  * @file: file ptr
1102  * @priv: file handle
1103  * @fmt: ptr to v4l2 format structure
1104  */
1105 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1106                                 struct v4l2_format *fmt)
1107 {
1108         struct video_device *vdev = video_devdata(file);
1109         struct channel_obj *ch = video_get_drvdata(vdev);
1110         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1111         struct v4l2_pix_format *pixfmt;
1112         int ret = 0;
1113
1114         vpif_dbg(2, debug, "%s\n", __func__);
1115
1116         if (vb2_is_busy(&common->buffer_queue))
1117                 return -EBUSY;
1118
1119         pixfmt = &fmt->fmt.pix;
1120         /* Check for valid field format */
1121         ret = vpif_check_format(ch, pixfmt, 0);
1122
1123         if (ret)
1124                 return ret;
1125         /* store the format in the channel object */
1126         common->fmt = *fmt;
1127         return 0;
1128 }
1129
1130 /**
1131  * vpif_querycap() - QUERYCAP handler
1132  * @file: file ptr
1133  * @priv: file handle
1134  * @cap: ptr to v4l2_capability structure
1135  */
1136 static int vpif_querycap(struct file *file, void  *priv,
1137                                 struct v4l2_capability *cap)
1138 {
1139         struct vpif_capture_config *config = vpif_dev->platform_data;
1140
1141         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1142         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1143         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
1144         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1145                  dev_name(vpif_dev));
1146         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1147
1148         return 0;
1149 }
1150
1151 /**
1152  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1153  * @file: file ptr
1154  * @priv: file handle
1155  * @timings: input timings
1156  */
1157 static int
1158 vpif_enum_dv_timings(struct file *file, void *priv,
1159                      struct v4l2_enum_dv_timings *timings)
1160 {
1161         struct vpif_capture_config *config = vpif_dev->platform_data;
1162         struct video_device *vdev = video_devdata(file);
1163         struct channel_obj *ch = video_get_drvdata(vdev);
1164         struct vpif_capture_chan_config *chan_cfg;
1165         struct v4l2_input input;
1166         int ret;
1167
1168         if (config->chan_config[ch->channel_id].inputs == NULL)
1169                 return -ENODATA;
1170
1171         chan_cfg = &config->chan_config[ch->channel_id];
1172         input = chan_cfg->inputs[ch->input_idx].input;
1173         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1174                 return -ENODATA;
1175
1176         timings->pad = 0;
1177
1178         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
1179         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1180                 return -EINVAL;
1181
1182         return ret;
1183 }
1184
1185 /**
1186  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1187  * @file: file ptr
1188  * @priv: file handle
1189  * @timings: input timings
1190  */
1191 static int
1192 vpif_query_dv_timings(struct file *file, void *priv,
1193                       struct v4l2_dv_timings *timings)
1194 {
1195         struct vpif_capture_config *config = vpif_dev->platform_data;
1196         struct video_device *vdev = video_devdata(file);
1197         struct channel_obj *ch = video_get_drvdata(vdev);
1198         struct vpif_capture_chan_config *chan_cfg;
1199         struct v4l2_input input;
1200         int ret;
1201
1202         if (config->chan_config[ch->channel_id].inputs == NULL)
1203                 return -ENODATA;
1204
1205         chan_cfg = &config->chan_config[ch->channel_id];
1206         input = chan_cfg->inputs[ch->input_idx].input;
1207         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1208                 return -ENODATA;
1209
1210         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1211         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1212                 return -ENODATA;
1213
1214         return ret;
1215 }
1216
1217 /**
1218  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1219  * @file: file ptr
1220  * @priv: file handle
1221  * @timings: digital video timings
1222  */
1223 static int vpif_s_dv_timings(struct file *file, void *priv,
1224                 struct v4l2_dv_timings *timings)
1225 {
1226         struct vpif_capture_config *config = vpif_dev->platform_data;
1227         struct video_device *vdev = video_devdata(file);
1228         struct channel_obj *ch = video_get_drvdata(vdev);
1229         struct vpif_params *vpifparams = &ch->vpifparams;
1230         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1231         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1232         struct video_obj *vid_ch = &ch->video;
1233         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1234         struct vpif_capture_chan_config *chan_cfg;
1235         struct v4l2_input input;
1236         int ret;
1237
1238         if (config->chan_config[ch->channel_id].inputs == NULL)
1239                 return -ENODATA;
1240
1241         chan_cfg = &config->chan_config[ch->channel_id];
1242         input = chan_cfg->inputs[ch->input_idx].input;
1243         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1244                 return -ENODATA;
1245
1246         if (timings->type != V4L2_DV_BT_656_1120) {
1247                 vpif_dbg(2, debug, "Timing type not defined\n");
1248                 return -EINVAL;
1249         }
1250
1251         if (vb2_is_busy(&common->buffer_queue))
1252                 return -EBUSY;
1253
1254         /* Configure subdevice timings, if any */
1255         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1256         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1257                 ret = 0;
1258         if (ret < 0) {
1259                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1260                 return ret;
1261         }
1262
1263         if (!(timings->bt.width && timings->bt.height &&
1264                                 (timings->bt.hbackporch ||
1265                                  timings->bt.hfrontporch ||
1266                                  timings->bt.hsync) &&
1267                                 timings->bt.vfrontporch &&
1268                                 (timings->bt.vbackporch ||
1269                                  timings->bt.vsync))) {
1270                 vpif_dbg(2, debug, "Timings for width, height, "
1271                                 "horizontal back porch, horizontal sync, "
1272                                 "horizontal front porch, vertical back porch, "
1273                                 "vertical sync and vertical back porch "
1274                                 "must be defined\n");
1275                 return -EINVAL;
1276         }
1277
1278         vid_ch->dv_timings = *timings;
1279
1280         /* Configure video port timings */
1281
1282         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1283         std_info->sav2eav = bt->width;
1284
1285         std_info->l1 = 1;
1286         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1287
1288         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1289         if (bt->interlaced) {
1290                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1291                         std_info->l5 = std_info->vsize/2 -
1292                                 (bt->vfrontporch - 1);
1293                         std_info->l7 = std_info->vsize/2 + 1;
1294                         std_info->l9 = std_info->l7 + bt->il_vsync +
1295                                 bt->il_vbackporch + 1;
1296                         std_info->l11 = std_info->vsize -
1297                                 (bt->il_vfrontporch - 1);
1298                 } else {
1299                         vpif_dbg(2, debug, "Required timing values for "
1300                                         "interlaced BT format missing\n");
1301                         return -EINVAL;
1302                 }
1303         } else {
1304                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1305         }
1306         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1307         std_info->width = bt->width;
1308         std_info->height = bt->height;
1309         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1310         std_info->ycmux_mode = 0;
1311         std_info->capture_format = 0;
1312         std_info->vbi_supported = 0;
1313         std_info->hd_sd = 1;
1314         std_info->stdid = 0;
1315
1316         vid_ch->stdid = 0;
1317         return 0;
1318 }
1319
1320 /**
1321  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1322  * @file: file ptr
1323  * @priv: file handle
1324  * @timings: digital video timings
1325  */
1326 static int vpif_g_dv_timings(struct file *file, void *priv,
1327                 struct v4l2_dv_timings *timings)
1328 {
1329         struct vpif_capture_config *config = vpif_dev->platform_data;
1330         struct video_device *vdev = video_devdata(file);
1331         struct channel_obj *ch = video_get_drvdata(vdev);
1332         struct video_obj *vid_ch = &ch->video;
1333         struct vpif_capture_chan_config *chan_cfg;
1334         struct v4l2_input input;
1335
1336         if (config->chan_config[ch->channel_id].inputs == NULL)
1337                 return -ENODATA;
1338
1339         chan_cfg = &config->chan_config[ch->channel_id];
1340         input = chan_cfg->inputs[ch->input_idx].input;
1341         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1342                 return -ENODATA;
1343
1344         *timings = vid_ch->dv_timings;
1345
1346         return 0;
1347 }
1348
1349 /*
1350  * vpif_log_status() - Status information
1351  * @file: file ptr
1352  * @priv: file handle
1353  *
1354  * Returns zero.
1355  */
1356 static int vpif_log_status(struct file *filep, void *priv)
1357 {
1358         /* status for sub devices */
1359         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1360
1361         return 0;
1362 }
1363
1364 /* vpif capture ioctl operations */
1365 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1366         .vidioc_querycap                = vpif_querycap,
1367         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1368         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1369         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1370         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1371
1372         .vidioc_enum_input              = vpif_enum_input,
1373         .vidioc_s_input                 = vpif_s_input,
1374         .vidioc_g_input                 = vpif_g_input,
1375
1376         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1377         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1378         .vidioc_querybuf                = vb2_ioctl_querybuf,
1379         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1380         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1381         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1382         .vidioc_streamon                = vb2_ioctl_streamon,
1383         .vidioc_streamoff               = vb2_ioctl_streamoff,
1384
1385         .vidioc_querystd                = vpif_querystd,
1386         .vidioc_s_std                   = vpif_s_std,
1387         .vidioc_g_std                   = vpif_g_std,
1388
1389         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1390         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1391         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1392         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1393
1394         .vidioc_log_status              = vpif_log_status,
1395 };
1396
1397 /* vpif file operations */
1398 static struct v4l2_file_operations vpif_fops = {
1399         .owner = THIS_MODULE,
1400         .open = v4l2_fh_open,
1401         .release = vb2_fop_release,
1402         .unlocked_ioctl = video_ioctl2,
1403         .mmap = vb2_fop_mmap,
1404         .poll = vb2_fop_poll
1405 };
1406
1407 /**
1408  * initialize_vpif() - Initialize vpif data structures
1409  *
1410  * Allocate memory for data structures and initialize them
1411  */
1412 static int initialize_vpif(void)
1413 {
1414         int err = 0, i, j;
1415         int free_channel_objects_index;
1416
1417         /* Default number of buffers should be 3 */
1418         if ((ch0_numbuffers > 0) &&
1419             (ch0_numbuffers < config_params.min_numbuffers))
1420                 ch0_numbuffers = config_params.min_numbuffers;
1421         if ((ch1_numbuffers > 0) &&
1422             (ch1_numbuffers < config_params.min_numbuffers))
1423                 ch1_numbuffers = config_params.min_numbuffers;
1424
1425         /* Set buffer size to min buffers size if it is invalid */
1426         if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
1427                 ch0_bufsize =
1428                     config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
1429         if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
1430                 ch1_bufsize =
1431                     config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
1432
1433         config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
1434         config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
1435         if (ch0_numbuffers) {
1436                 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
1437                     = ch0_bufsize;
1438         }
1439         if (ch1_numbuffers) {
1440                 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
1441                     = ch1_bufsize;
1442         }
1443
1444         /* Allocate memory for six channel objects */
1445         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1446                 vpif_obj.dev[i] =
1447                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1448                 /* If memory allocation fails, return error */
1449                 if (!vpif_obj.dev[i]) {
1450                         free_channel_objects_index = i;
1451                         err = -ENOMEM;
1452                         goto vpif_init_free_channel_objects;
1453                 }
1454         }
1455         return 0;
1456
1457 vpif_init_free_channel_objects:
1458         for (j = 0; j < free_channel_objects_index; j++)
1459                 kfree(vpif_obj.dev[j]);
1460         return err;
1461 }
1462
1463 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1464                             struct v4l2_subdev *subdev,
1465                             struct v4l2_async_subdev *asd)
1466 {
1467         int i;
1468
1469         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1470                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1471                             subdev->name)) {
1472                         vpif_obj.sd[i] = subdev;
1473                         return 0;
1474                 }
1475
1476         return -EINVAL;
1477 }
1478
1479 static int vpif_probe_complete(void)
1480 {
1481         struct common_obj *common;
1482         struct video_device *vdev;
1483         struct channel_obj *ch;
1484         struct vb2_queue *q;
1485         int i, j, err, k;
1486
1487         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1488                 ch = vpif_obj.dev[j];
1489                 ch->channel_id = j;
1490                 common = &(ch->common[VPIF_VIDEO_INDEX]);
1491                 spin_lock_init(&common->irqlock);
1492                 mutex_init(&common->lock);
1493
1494                 /* select input 0 */
1495                 err = vpif_set_input(vpif_obj.config, ch, 0);
1496                 if (err)
1497                         goto probe_out;
1498
1499                 /* Initialize vb2 queue */
1500                 q = &common->buffer_queue;
1501                 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1502                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1503                 q->drv_priv = ch;
1504                 q->ops = &video_qops;
1505                 q->mem_ops = &vb2_dma_contig_memops;
1506                 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1507                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1508                 q->min_buffers_needed = 1;
1509                 q->lock = &common->lock;
1510
1511                 err = vb2_queue_init(q);
1512                 if (err) {
1513                         vpif_err("vpif_capture: vb2_queue_init() failed\n");
1514                         goto probe_out;
1515                 }
1516
1517                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1518                 if (IS_ERR(common->alloc_ctx)) {
1519                         vpif_err("Failed to get the context\n");
1520                         err = PTR_ERR(common->alloc_ctx);
1521                         goto probe_out;
1522                 }
1523
1524                 INIT_LIST_HEAD(&common->dma_queue);
1525
1526                 /* Initialize the video_device structure */
1527                 vdev = ch->video_dev;
1528                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1529                 vdev->release = video_device_release;
1530                 vdev->fops = &vpif_fops;
1531                 vdev->ioctl_ops = &vpif_ioctl_ops;
1532                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1533                 vdev->vfl_dir = VFL_DIR_RX;
1534                 vdev->queue = q;
1535                 vdev->lock = &common->lock;
1536                 set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
1537                 video_set_drvdata(ch->video_dev, ch);
1538                 err = video_register_device(vdev,
1539                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
1540                 if (err)
1541                         goto probe_out;
1542         }
1543
1544         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
1545         return 0;
1546
1547 probe_out:
1548         for (k = 0; k < j; k++) {
1549                 /* Get the pointer to the channel object */
1550                 ch = vpif_obj.dev[k];
1551                 common = &ch->common[k];
1552                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1553                 /* Unregister video device */
1554                 video_unregister_device(ch->video_dev);
1555         }
1556         kfree(vpif_obj.sd);
1557         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1558                 ch = vpif_obj.dev[i];
1559                 /* Note: does nothing if ch->video_dev == NULL */
1560                 video_device_release(ch->video_dev);
1561         }
1562         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1563
1564         return err;
1565 }
1566
1567 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1568 {
1569         return vpif_probe_complete();
1570 }
1571
1572 /**
1573  * vpif_probe : This function probes the vpif capture driver
1574  * @pdev: platform device pointer
1575  *
1576  * This creates device entries by register itself to the V4L2 driver and
1577  * initializes fields of each channel objects
1578  */
1579 static __init int vpif_probe(struct platform_device *pdev)
1580 {
1581         struct vpif_subdev_info *subdevdata;
1582         int i, j, err;
1583         int res_idx = 0;
1584         struct i2c_adapter *i2c_adap;
1585         struct channel_obj *ch;
1586         struct video_device *vfd;
1587         struct resource *res;
1588         int subdev_count;
1589
1590         vpif_dev = &pdev->dev;
1591
1592         err = initialize_vpif();
1593         if (err) {
1594                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1595                 return err;
1596         }
1597
1598         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1599         if (err) {
1600                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1601                 return err;
1602         }
1603
1604         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1605                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1606                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1607                                         (void *)(&vpif_obj.dev[res_idx]->
1608                                         channel_id));
1609                 if (err) {
1610                         err = -EINVAL;
1611                         goto vpif_unregister;
1612                 }
1613                 res_idx++;
1614         }
1615
1616         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1617                 /* Get the pointer to the channel object */
1618                 ch = vpif_obj.dev[i];
1619                 /* Allocate memory for video device */
1620                 vfd = video_device_alloc();
1621                 if (NULL == vfd) {
1622                         for (j = 0; j < i; j++) {
1623                                 ch = vpif_obj.dev[j];
1624                                 video_device_release(ch->video_dev);
1625                         }
1626                         err = -ENOMEM;
1627                         goto vpif_unregister;
1628                 }
1629
1630                 /* Set video_dev to the video device */
1631                 ch->video_dev = vfd;
1632         }
1633
1634         vpif_obj.config = pdev->dev.platform_data;
1635
1636         subdev_count = vpif_obj.config->subdev_count;
1637         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1638                                 GFP_KERNEL);
1639         if (vpif_obj.sd == NULL) {
1640                 vpif_err("unable to allocate memory for subdevice pointers\n");
1641                 err = -ENOMEM;
1642                 goto vpif_sd_error;
1643         }
1644
1645         if (!vpif_obj.config->asd_sizes) {
1646                 i2c_adap = i2c_get_adapter(1);
1647                 for (i = 0; i < subdev_count; i++) {
1648                         subdevdata = &vpif_obj.config->subdev_info[i];
1649                         vpif_obj.sd[i] =
1650                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1651                                                           i2c_adap,
1652                                                           &subdevdata->
1653                                                           board_info,
1654                                                           NULL);
1655
1656                         if (!vpif_obj.sd[i]) {
1657                                 vpif_err("Error registering v4l2 subdevice\n");
1658                                 err = -ENODEV;
1659                                 goto probe_subdev_out;
1660                         }
1661                         v4l2_info(&vpif_obj.v4l2_dev,
1662                                   "registered sub device %s\n",
1663                                    subdevdata->name);
1664                 }
1665                 vpif_probe_complete();
1666         } else {
1667                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1668                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1669                 vpif_obj.notifier.bound = vpif_async_bound;
1670                 vpif_obj.notifier.complete = vpif_async_complete;
1671                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1672                                                    &vpif_obj.notifier);
1673                 if (err) {
1674                         vpif_err("Error registering async notifier\n");
1675                         err = -EINVAL;
1676                         goto probe_subdev_out;
1677                 }
1678         }
1679
1680         return 0;
1681
1682 probe_subdev_out:
1683         /* free sub devices memory */
1684         kfree(vpif_obj.sd);
1685
1686 vpif_sd_error:
1687         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1688                 ch = vpif_obj.dev[i];
1689                 /* Note: does nothing if ch->video_dev == NULL */
1690                 video_device_release(ch->video_dev);
1691         }
1692 vpif_unregister:
1693         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1694
1695         return err;
1696 }
1697
1698 /**
1699  * vpif_remove() - driver remove handler
1700  * @device: ptr to platform device structure
1701  *
1702  * The vidoe device is unregistered
1703  */
1704 static int vpif_remove(struct platform_device *device)
1705 {
1706         struct common_obj *common;
1707         struct channel_obj *ch;
1708         int i;
1709
1710         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1711
1712         kfree(vpif_obj.sd);
1713         /* un-register device */
1714         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1715                 /* Get the pointer to the channel object */
1716                 ch = vpif_obj.dev[i];
1717                 common = &ch->common[i];
1718                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1719                 /* Unregister video device */
1720                 video_unregister_device(ch->video_dev);
1721                 kfree(vpif_obj.dev[i]);
1722         }
1723         return 0;
1724 }
1725
1726 #ifdef CONFIG_PM_SLEEP
1727 /**
1728  * vpif_suspend: vpif device suspend
1729  */
1730 static int vpif_suspend(struct device *dev)
1731 {
1732
1733         struct common_obj *common;
1734         struct channel_obj *ch;
1735         int i;
1736
1737         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1738                 /* Get the pointer to the channel object */
1739                 ch = vpif_obj.dev[i];
1740                 common = &ch->common[VPIF_VIDEO_INDEX];
1741
1742                 if (!vb2_is_streaming(&common->buffer_queue))
1743                         continue;
1744
1745                 mutex_lock(&common->lock);
1746                 /* Disable channel */
1747                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1748                         enable_channel0(0);
1749                         channel0_intr_enable(0);
1750                 }
1751                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1752                         ycmux_mode == 2) {
1753                         enable_channel1(0);
1754                         channel1_intr_enable(0);
1755                 }
1756                 mutex_unlock(&common->lock);
1757         }
1758
1759         return 0;
1760 }
1761
1762 /*
1763  * vpif_resume: vpif device suspend
1764  */
1765 static int vpif_resume(struct device *dev)
1766 {
1767         struct common_obj *common;
1768         struct channel_obj *ch;
1769         int i;
1770
1771         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1772                 /* Get the pointer to the channel object */
1773                 ch = vpif_obj.dev[i];
1774                 common = &ch->common[VPIF_VIDEO_INDEX];
1775
1776                 if (!vb2_is_streaming(&common->buffer_queue))
1777                         continue;
1778
1779                 mutex_lock(&common->lock);
1780                 /* Enable channel */
1781                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1782                         enable_channel0(1);
1783                         channel0_intr_enable(1);
1784                 }
1785                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1786                         ycmux_mode == 2) {
1787                         enable_channel1(1);
1788                         channel1_intr_enable(1);
1789                 }
1790                 mutex_unlock(&common->lock);
1791         }
1792
1793         return 0;
1794 }
1795 #endif
1796
1797 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1798
1799 static __refdata struct platform_driver vpif_driver = {
1800         .driver = {
1801                 .name   = VPIF_DRIVER_NAME,
1802                 .owner  = THIS_MODULE,
1803                 .pm     = &vpif_pm_ops,
1804         },
1805         .probe = vpif_probe,
1806         .remove = vpif_remove,
1807 };
1808
1809 module_platform_driver(vpif_driver);