drivers/media/pci/solo6x10/solo6x10-v4l2.c

   1 /*
   2  * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
   3  *
   4  * Original author:
   5  * Ben Collins <bcollins@ubuntu.com>
   6  *
   7  * Additional work by:
   8  * John Brooks <john.brooks@bluecherry.net>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/kthread.h>
  24 #include <linux/freezer.h>
  25
  26 #include <media/v4l2-ioctl.h>
  27 #include <media/v4l2-common.h>
  28 #include <media/v4l2-event.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/videobuf2-dma-contig.h>
  31
  32 #include "solo6x10.h"
  33 #include "solo6x10-tw28.h"
  34
  35 /* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
  36 #define SOLO_HW_BPL             2048
  37 #define solo_vlines(__solo)     (__solo->video_vsize * 2)
  38 #define solo_image_size(__solo) (solo_bytesperline(__solo) * \
  39                                  solo_vlines(__solo))
  40 #define solo_bytesperline(__solo) (__solo->video_hsize * 2)
  41
  42 #define MIN_VID_BUFFERS         2
  43
  44 static inline void erase_on(struct solo_dev *solo_dev)
  45 {
  46         solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
  47         solo_dev->erasing = 1;
  48         solo_dev->frame_blank = 0;
  49 }
  50
  51 static inline int erase_off(struct solo_dev *solo_dev)
  52 {
  53         if (!solo_dev->erasing)
  54                 return 0;
  55
  56         /* First time around, assert erase off */
  57         if (!solo_dev->frame_blank)
  58                 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
  59         /* Keep the erasing flag on for 8 frames minimum */
  60         if (solo_dev->frame_blank++ >= 8)
  61                 solo_dev->erasing = 0;
  62
  63         return 1;
  64 }
  65
  66 void solo_video_in_isr(struct solo_dev *solo_dev)
  67 {
  68         wake_up_interruptible_all(&solo_dev->disp_thread_wait);
  69 }
  70
  71 static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
  72                            int sx, int sy, int ex, int ey, int scale)
  73 {
  74         if (ch >= solo_dev->nr_chans)
  75                 return;
  76
  77         /* Here, we just keep window/channel the same */
  78         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
  79                        SOLO_VI_WIN_CHANNEL(ch) |
  80                        SOLO_VI_WIN_SX(sx) |
  81                        SOLO_VI_WIN_EX(ex) |
  82                        SOLO_VI_WIN_SCALE(scale));
  83
  84         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
  85                        SOLO_VI_WIN_SY(sy) |
  86                        SOLO_VI_WIN_EY(ey));
  87 }
  88
  89 static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
  90 {
  91         u8 ch = idx * 4;
  92
  93         if (ch >= solo_dev->nr_chans)
  94                 return -EINVAL;
  95
  96         if (!on) {
  97                 u8 i;
  98
  99                 for (i = ch; i < ch + 4; i++)
 100                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 101                                        solo_vlines(solo_dev),
 102                                        solo_dev->video_hsize,
 103                                        solo_vlines(solo_dev), 0);
 104                 return 0;
 105         }
 106
 107         /* Row 1 */
 108         solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
 109                        solo_vlines(solo_dev) / 2, 3);
 110         solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
 111                        solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
 112         /* Row 2 */
 113         solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
 114                        solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
 115         solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
 116                        solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
 117                        solo_vlines(solo_dev), 3);
 118
 119         return 0;
 120 }
 121
 122 static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
 123 {
 124         int sy, ysize, hsize, i;
 125
 126         if (!on) {
 127                 for (i = 0; i < 16; i++)
 128                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 129                                        solo_vlines(solo_dev),
 130                                        solo_dev->video_hsize,
 131                                        solo_vlines(solo_dev), 0);
 132                 return 0;
 133         }
 134
 135         ysize = solo_vlines(solo_dev) / 4;
 136         hsize = solo_dev->video_hsize / 4;
 137
 138         for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
 139                 solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
 140                                sy + ysize, 5);
 141                 solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
 142                                hsize * 2, sy + ysize, 5);
 143                 solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
 144                                hsize * 3, sy + ysize, 5);
 145                 solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
 146                                solo_dev->video_hsize, sy + ysize, 5);
 147         }
 148
 149         return 0;
 150 }
 151
 152 static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
 153 {
 154         u8 ext_ch;
 155
 156         if (ch < solo_dev->nr_chans) {
 157                 solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
 158                                on ? 0 : solo_vlines(solo_dev),
 159                                solo_dev->video_hsize, solo_vlines(solo_dev),
 160                                on ? 1 : 0);
 161                 return 0;
 162         }
 163
 164         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 165                 return -EINVAL;
 166
 167         ext_ch = ch - solo_dev->nr_chans;
 168
 169         /* 4up's first */
 170         if (ext_ch < 4)
 171                 return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
 172
 173         /* Remaining case is 16up for 16-port */
 174         return solo_v4l2_ch_ext_16up(solo_dev, on);
 175 }
 176
 177 static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
 178 {
 179         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 180                 return -EINVAL;
 181
 182         erase_on(solo_dev);
 183
 184         solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
 185         solo_v4l2_ch(solo_dev, ch, 1);
 186
 187         solo_dev->cur_disp_ch = ch;
 188
 189         return 0;
 190 }
 191
 192 static void solo_fillbuf(struct solo_dev *solo_dev,
 193                          struct vb2_buffer *vb)
 194 {
 195         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 196         dma_addr_t addr;
 197         unsigned int fdma_addr;
 198         int error = -1;
 199         int i;
 200
 201         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 202         if (!addr)
 203                 goto finish_buf;
 204
 205         if (erase_off(solo_dev)) {
 206                 void *p = vb2_plane_vaddr(vb, 0);
 207                 int image_size = solo_image_size(solo_dev);
 208
 209                 for (i = 0; i < image_size; i += 2) {
 210                         ((u8 *)p)[i] = 0x80;
 211                         ((u8 *)p)[i + 1] = 0x00;
 212                 }
 213                 error = 0;
 214         } else {
 215                 fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
 216                                 (SOLO_HW_BPL * solo_vlines(solo_dev)));
 217
 218                 error = solo_p2m_dma_t(solo_dev, 0, addr, fdma_addr,
 219                                        solo_bytesperline(solo_dev),
 220                                        solo_vlines(solo_dev), SOLO_HW_BPL);
 221         }
 222
 223 finish_buf:
 224         if (!error) {
 225                 vb2_set_plane_payload(vb, 0,
 226                         solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
 227                 vbuf->sequence = solo_dev->sequence++;
 228                 v4l2_get_timestamp(&vbuf->timestamp);
 229         }
 230
 231         vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 232 }
 233
 234 static void solo_thread_try(struct solo_dev *solo_dev)
 235 {
 236         struct solo_vb2_buf *vb;
 237
 238         /* Only "break" from this loop if slock is held, otherwise
 239          * just return. */
 240         for (;;) {
 241                 unsigned int cur_write;
 242
 243                 cur_write = SOLO_VI_STATUS0_PAGE(
 244                         solo_reg_read(solo_dev, SOLO_VI_STATUS0));
 245                 if (cur_write == solo_dev->old_write)
 246                         return;
 247
 248                 spin_lock(&solo_dev->slock);
 249
 250                 if (list_empty(&solo_dev->vidq_active))
 251                         break;
 252
 253                 vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
 254                                       list);
 255
 256                 solo_dev->old_write = cur_write;
 257                 list_del(&vb->list);
 258
 259                 spin_unlock(&solo_dev->slock);
 260
 261                 solo_fillbuf(solo_dev, &vb->vb.vb2_buf);
 262         }
 263
 264         assert_spin_locked(&solo_dev->slock);
 265         spin_unlock(&solo_dev->slock);
 266 }
 267
 268 static int solo_thread(void *data)
 269 {
 270         struct solo_dev *solo_dev = data;
 271         DECLARE_WAITQUEUE(wait, current);
 272
 273         set_freezable();
 274         add_wait_queue(&solo_dev->disp_thread_wait, &wait);
 275
 276         for (;;) {
 277                 long timeout = schedule_timeout_interruptible(HZ);
 278
 279                 if (timeout == -ERESTARTSYS || kthread_should_stop())
 280                         break;
 281                 solo_thread_try(solo_dev);
 282                 try_to_freeze();
 283         }
 284
 285         remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
 286
 287         return 0;
 288 }
 289
 290 static int solo_start_thread(struct solo_dev *solo_dev)
 291 {
 292         int ret = 0;
 293
 294         solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
 295
 296         if (IS_ERR(solo_dev->kthread)) {
 297                 ret = PTR_ERR(solo_dev->kthread);
 298                 solo_dev->kthread = NULL;
 299                 return ret;
 300         }
 301         solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
 302
 303         return ret;
 304 }
 305
 306 static void solo_stop_thread(struct solo_dev *solo_dev)
 307 {
 308         if (!solo_dev->kthread)
 309                 return;
 310
 311         solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
 312         kthread_stop(solo_dev->kthread);
 313         solo_dev->kthread = NULL;
 314 }
 315
 316 static int solo_queue_setup(struct vb2_queue *q, const void *parg,
 317                            unsigned int *num_buffers, unsigned int *num_planes,
 318                            unsigned int sizes[], void *alloc_ctxs[])
 319 {
 320         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 321
 322         sizes[0] = solo_image_size(solo_dev);
 323         alloc_ctxs[0] = solo_dev->alloc_ctx;
 324         *num_planes = 1;
 325
 326         if (*num_buffers < MIN_VID_BUFFERS)
 327                 *num_buffers = MIN_VID_BUFFERS;
 328
 329         return 0;
 330 }
 331
 332 static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
 333 {
 334         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 335
 336         solo_dev->sequence = 0;
 337         return solo_start_thread(solo_dev);
 338 }
 339
 340 static void solo_stop_streaming(struct vb2_queue *q)
 341 {
 342         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 343
 344         solo_stop_thread(solo_dev);
 345         INIT_LIST_HEAD(&solo_dev->vidq_active);
 346 }
 347
 348 static void solo_buf_queue(struct vb2_buffer *vb)
 349 {
 350         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 351         struct vb2_queue *vq = vb->vb2_queue;
 352         struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
 353         struct solo_vb2_buf *solo_vb =
 354                 container_of(vbuf, struct solo_vb2_buf, vb);
 355
 356         spin_lock(&solo_dev->slock);
 357         list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
 358         spin_unlock(&solo_dev->slock);
 359         wake_up_interruptible(&solo_dev->disp_thread_wait);
 360 }
 361
 362 static const struct vb2_ops solo_video_qops = {
 363         .queue_setup    = solo_queue_setup,
 364         .buf_queue      = solo_buf_queue,
 365         .start_streaming = solo_start_streaming,
 366         .stop_streaming = solo_stop_streaming,
 367         .wait_prepare   = vb2_ops_wait_prepare,
 368         .wait_finish    = vb2_ops_wait_finish,
 369 };
 370
 371 static int solo_querycap(struct file *file, void  *priv,
 372                          struct v4l2_capability *cap)
 373 {
 374         struct solo_dev *solo_dev = video_drvdata(file);
 375
 376         strcpy(cap->driver, SOLO6X10_NAME);
 377         strcpy(cap->card, "Softlogic 6x10");
 378         snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
 379                  pci_name(solo_dev->pdev));
 380         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
 381                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 382         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 383         return 0;
 384 }
 385
 386 static int solo_enum_ext_input(struct solo_dev *solo_dev,
 387                                struct v4l2_input *input)
 388 {
 389         static const char * const dispnames_1[] = { "4UP" };
 390         static const char * const dispnames_2[] = { "4UP-1", "4UP-2" };
 391         static const char * const dispnames_5[] = {
 392                 "4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
 393         };
 394         const char * const *dispnames;
 395
 396         if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
 397                 return -EINVAL;
 398
 399         if (solo_dev->nr_ext == 5)
 400                 dispnames = dispnames_5;
 401         else if (solo_dev->nr_ext == 2)
 402                 dispnames = dispnames_2;
 403         else
 404                 dispnames = dispnames_1;
 405
 406         snprintf(input->name, sizeof(input->name), "Multi %s",
 407                  dispnames[input->index - solo_dev->nr_chans]);
 408
 409         return 0;
 410 }
 411
 412 static int solo_enum_input(struct file *file, void *priv,
 413                            struct v4l2_input *input)
 414 {
 415         struct solo_dev *solo_dev = video_drvdata(file);
 416
 417         if (input->index >= solo_dev->nr_chans) {
 418                 int ret = solo_enum_ext_input(solo_dev, input);
 419
 420                 if (ret < 0)
 421                         return ret;
 422         } else {
 423                 snprintf(input->name, sizeof(input->name), "Camera %d",
 424                          input->index + 1);
 425
 426                 /* We can only check this for normal inputs */
 427                 if (!tw28_get_video_status(solo_dev, input->index))
 428                         input->status = V4L2_IN_ST_NO_SIGNAL;
 429         }
 430
 431         input->type = V4L2_INPUT_TYPE_CAMERA;
 432         input->std = solo_dev->vfd->tvnorms;
 433         return 0;
 434 }
 435
 436 static int solo_set_input(struct file *file, void *priv, unsigned int index)
 437 {
 438         struct solo_dev *solo_dev = video_drvdata(file);
 439         int ret = solo_v4l2_set_ch(solo_dev, index);
 440
 441         if (!ret) {
 442                 while (erase_off(solo_dev))
 443                         /* Do nothing */;
 444         }
 445
 446         return ret;
 447 }
 448
 449 static int solo_get_input(struct file *file, void *priv, unsigned int *index)
 450 {
 451         struct solo_dev *solo_dev = video_drvdata(file);
 452
 453         *index = solo_dev->cur_disp_ch;
 454
 455         return 0;
 456 }
 457
 458 static int solo_enum_fmt_cap(struct file *file, void *priv,
 459                              struct v4l2_fmtdesc *f)
 460 {
 461         if (f->index)
 462                 return -EINVAL;
 463
 464         f->pixelformat = V4L2_PIX_FMT_UYVY;
 465         strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));
 466
 467         return 0;
 468 }
 469
 470 static int solo_try_fmt_cap(struct file *file, void *priv,
 471                             struct v4l2_format *f)
 472 {
 473         struct solo_dev *solo_dev = video_drvdata(file);
 474         struct v4l2_pix_format *pix = &f->fmt.pix;
 475         int image_size = solo_image_size(solo_dev);
 476
 477         if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
 478                 return -EINVAL;
 479
 480         pix->width = solo_dev->video_hsize;
 481         pix->height = solo_vlines(solo_dev);
 482         pix->sizeimage = image_size;
 483         pix->field = V4L2_FIELD_INTERLACED;
 484         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 485         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 486         pix->priv = 0;
 487         return 0;
 488 }
 489
 490 static int solo_set_fmt_cap(struct file *file, void *priv,
 491                             struct v4l2_format *f)
 492 {
 493         struct solo_dev *solo_dev = video_drvdata(file);
 494
 495         if (vb2_is_busy(&solo_dev->vidq))
 496                 return -EBUSY;
 497
 498         /* For right now, if it doesn't match our running config,
 499          * then fail */
 500         return solo_try_fmt_cap(file, priv, f);
 501 }
 502
 503 static int solo_get_fmt_cap(struct file *file, void *priv,
 504                             struct v4l2_format *f)
 505 {
 506         struct solo_dev *solo_dev = video_drvdata(file);
 507         struct v4l2_pix_format *pix = &f->fmt.pix;
 508
 509         pix->width = solo_dev->video_hsize;
 510         pix->height = solo_vlines(solo_dev);
 511         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 512         pix->field = V4L2_FIELD_INTERLACED;
 513         pix->sizeimage = solo_image_size(solo_dev);
 514         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 515         pix->bytesperline = solo_bytesperline(solo_dev);
 516         pix->priv = 0;
 517
 518         return 0;
 519 }
 520
 521 static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
 522 {
 523         struct solo_dev *solo_dev = video_drvdata(file);
 524
 525         if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
 526                 *i = V4L2_STD_NTSC_M;
 527         else
 528                 *i = V4L2_STD_PAL;
 529         return 0;
 530 }
 531
 532 int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
 533 {
 534         int i;
 535
 536         /* Make sure all video nodes are idle */
 537         if (vb2_is_busy(&solo_dev->vidq))
 538                 return -EBUSY;
 539         for (i = 0; i < solo_dev->nr_chans; i++)
 540                 if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
 541                         return -EBUSY;
 542         solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
 543                                          SOLO_VO_FMT_TYPE_NTSC;
 544         /* Reconfigure for the new standard */
 545         solo_disp_init(solo_dev);
 546         solo_enc_init(solo_dev);
 547         solo_tw28_init(solo_dev);
 548         for (i = 0; i < solo_dev->nr_chans; i++)
 549                 solo_update_mode(solo_dev->v4l2_enc[i]);
 550         return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
 551 }
 552
 553 static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
 554 {
 555         struct solo_dev *solo_dev = video_drvdata(file);
 556
 557         return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
 558 }
 559
 560 static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
 561 {
 562         struct solo_dev *solo_dev =
 563                 container_of(ctrl->handler, struct solo_dev, disp_hdl);
 564
 565         switch (ctrl->id) {
 566         case V4L2_CID_MOTION_TRACE:
 567                 if (ctrl->val) {
 568                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
 569                                         SOLO_VI_MOTION_Y_ADD |
 570                                         SOLO_VI_MOTION_Y_VALUE(0x20) |
 571                                         SOLO_VI_MOTION_CB_VALUE(0x10) |
 572                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 573                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
 574                                         SOLO_VI_MOTION_CR_ADD |
 575                                         SOLO_VI_MOTION_Y_VALUE(0x10) |
 576                                         SOLO_VI_MOTION_CB_VALUE(0x80) |
 577                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 578                 } else {
 579                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
 580                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
 581                 }
 582                 return 0;
 583         default:
 584                 break;
 585         }
 586         return -EINVAL;
 587 }
 588
 589 static const struct v4l2_file_operations solo_v4l2_fops = {
 590         .owner                  = THIS_MODULE,
 591         .open                   = v4l2_fh_open,
 592         .release                = vb2_fop_release,
 593         .read                   = vb2_fop_read,
 594         .poll                   = vb2_fop_poll,
 595         .mmap                   = vb2_fop_mmap,
 596         .unlocked_ioctl         = video_ioctl2,
 597 };
 598
 599 static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
 600         .vidioc_querycap                = solo_querycap,
 601         .vidioc_s_std                   = solo_s_std,
 602         .vidioc_g_std                   = solo_g_std,
 603         /* Input callbacks */
 604         .vidioc_enum_input              = solo_enum_input,
 605         .vidioc_s_input                 = solo_set_input,
 606         .vidioc_g_input                 = solo_get_input,
 607         /* Video capture format callbacks */
 608         .vidioc_enum_fmt_vid_cap        = solo_enum_fmt_cap,
 609         .vidioc_try_fmt_vid_cap         = solo_try_fmt_cap,
 610         .vidioc_s_fmt_vid_cap           = solo_set_fmt_cap,
 611         .vidioc_g_fmt_vid_cap           = solo_get_fmt_cap,
 612         /* Streaming I/O */
 613         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 614         .vidioc_querybuf                = vb2_ioctl_querybuf,
 615         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 616         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 617         .vidioc_streamon                = vb2_ioctl_streamon,
 618         .vidioc_streamoff               = vb2_ioctl_streamoff,
 619         /* Logging and events */
 620         .vidioc_log_status              = v4l2_ctrl_log_status,
 621         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 622         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 623 };
 624
 625 static struct video_device solo_v4l2_template = {
 626         .name                   = SOLO6X10_NAME,
 627         .fops                   = &solo_v4l2_fops,
 628         .ioctl_ops              = &solo_v4l2_ioctl_ops,
 629         .minor                  = -1,
 630         .release                = video_device_release,
 631         .tvnorms                = V4L2_STD_NTSC_M | V4L2_STD_PAL,
 632 };
 633
 634 static const struct v4l2_ctrl_ops solo_ctrl_ops = {
 635         .s_ctrl = solo_s_ctrl,
 636 };
 637
 638 static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
 639         .ops = &solo_ctrl_ops,
 640         .id = V4L2_CID_MOTION_TRACE,
 641         .name = "Motion Detection Trace",
 642         .type = V4L2_CTRL_TYPE_BOOLEAN,
 643         .max = 1,
 644         .step = 1,
 645 };
 646
 647 int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 648 {
 649         int ret;
 650         int i;
 651
 652         init_waitqueue_head(&solo_dev->disp_thread_wait);
 653         spin_lock_init(&solo_dev->slock);
 654         mutex_init(&solo_dev->lock);
 655         INIT_LIST_HEAD(&solo_dev->vidq_active);
 656
 657         solo_dev->vfd = video_device_alloc();
 658         if (!solo_dev->vfd)
 659                 return -ENOMEM;
 660
 661         *solo_dev->vfd = solo_v4l2_template;
 662         solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
 663         solo_dev->vfd->queue = &solo_dev->vidq;
 664         solo_dev->vfd->lock = &solo_dev->lock;
 665         v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
 666         v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
 667         if (solo_dev->disp_hdl.error) {
 668                 ret = solo_dev->disp_hdl.error;
 669                 goto fail;
 670         }
 671         solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
 672
 673         video_set_drvdata(solo_dev->vfd, solo_dev);
 674
 675         solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 676         solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 677         solo_dev->vidq.ops = &solo_video_qops;
 678         solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
 679         solo_dev->vidq.drv_priv = solo_dev;
 680         solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 681         solo_dev->vidq.gfp_flags = __GFP_DMA32 | __GFP_KSWAPD_RECLAIM;
 682         solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
 683         solo_dev->vidq.lock = &solo_dev->lock;
 684         ret = vb2_queue_init(&solo_dev->vidq);
 685         if (ret < 0)
 686                 goto fail;
 687
 688         solo_dev->alloc_ctx = vb2_dma_contig_init_ctx(&solo_dev->pdev->dev);
 689         if (IS_ERR(solo_dev->alloc_ctx)) {
 690                 dev_err(&solo_dev->pdev->dev, "Can't allocate buffer context");
 691                 return PTR_ERR(solo_dev->alloc_ctx);
 692         }
 693
 694         /* Cycle all the channels and clear */
 695         for (i = 0; i < solo_dev->nr_chans; i++) {
 696                 solo_v4l2_set_ch(solo_dev, i);
 697                 while (erase_off(solo_dev))
 698                         /* Do nothing */;
 699         }
 700
 701         /* Set the default display channel */
 702         solo_v4l2_set_ch(solo_dev, 0);
 703         while (erase_off(solo_dev))
 704                 /* Do nothing */;
 705
 706         ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
 707         if (ret < 0)
 708                 goto fail;
 709
 710         snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
 711                  SOLO6X10_NAME, solo_dev->vfd->num);
 712
 713         dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
 714                  "%d inputs (%d extended)\n", solo_dev->vfd->num,
 715                  solo_dev->nr_chans, solo_dev->nr_ext);
 716
 717         return 0;
 718
 719 fail:
 720         video_device_release(solo_dev->vfd);
 721         vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
 722         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 723         solo_dev->vfd = NULL;
 724         return ret;
 725 }
 726
 727 void solo_v4l2_exit(struct solo_dev *solo_dev)
 728 {
 729         if (solo_dev->vfd == NULL)
 730                 return;
 731
 732         video_unregister_device(solo_dev->vfd);
 733         vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
 734         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 735         solo_dev->vfd = NULL;
 736 }