drivers/staging/media/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  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/kthread.h>
  28 #include <linux/freezer.h>
  29
  30 #include <media/v4l2-ioctl.h>
  31 #include <media/v4l2-common.h>
  32 #include <media/v4l2-event.h>
  33 #include <media/videobuf2-dma-contig.h>
  34
  35 #include "solo6x10.h"
  36 #include "solo6x10-tw28.h"
  37
  38 /* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
  39 #define SOLO_HW_BPL             2048
  40 #define solo_vlines(__solo)     (__solo->video_vsize * 2)
  41 #define solo_image_size(__solo) (solo_bytesperline(__solo) * \
  42                                  solo_vlines(__solo))
  43 #define solo_bytesperline(__solo) (__solo->video_hsize * 2)
  44
  45 #define MIN_VID_BUFFERS         2
  46
  47 static inline void erase_on(struct solo_dev *solo_dev)
  48 {
  49         solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
  50         solo_dev->erasing = 1;
  51         solo_dev->frame_blank = 0;
  52 }
  53
  54 static inline int erase_off(struct solo_dev *solo_dev)
  55 {
  56         if (!solo_dev->erasing)
  57                 return 0;
  58
  59         /* First time around, assert erase off */
  60         if (!solo_dev->frame_blank)
  61                 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
  62         /* Keep the erasing flag on for 8 frames minimum */
  63         if (solo_dev->frame_blank++ >= 8)
  64                 solo_dev->erasing = 0;
  65
  66         return 1;
  67 }
  68
  69 void solo_video_in_isr(struct solo_dev *solo_dev)
  70 {
  71         wake_up_interruptible_all(&solo_dev->disp_thread_wait);
  72 }
  73
  74 static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
  75                            int sx, int sy, int ex, int ey, int scale)
  76 {
  77         if (ch >= solo_dev->nr_chans)
  78                 return;
  79
  80         /* Here, we just keep window/channel the same */
  81         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
  82                        SOLO_VI_WIN_CHANNEL(ch) |
  83                        SOLO_VI_WIN_SX(sx) |
  84                        SOLO_VI_WIN_EX(ex) |
  85                        SOLO_VI_WIN_SCALE(scale));
  86
  87         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
  88                        SOLO_VI_WIN_SY(sy) |
  89                        SOLO_VI_WIN_EY(ey));
  90 }
  91
  92 static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
  93 {
  94         u8 ch = idx * 4;
  95
  96         if (ch >= solo_dev->nr_chans)
  97                 return -EINVAL;
  98
  99         if (!on) {
 100                 u8 i;
 101                 for (i = ch; i < ch + 4; i++)
 102                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 103                                        solo_vlines(solo_dev),
 104                                        solo_dev->video_hsize,
 105                                        solo_vlines(solo_dev), 0);
 106                 return 0;
 107         }
 108
 109         /* Row 1 */
 110         solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
 111                        solo_vlines(solo_dev) / 2, 3);
 112         solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
 113                        solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
 114         /* Row 2 */
 115         solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
 116                        solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
 117         solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
 118                        solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
 119                        solo_vlines(solo_dev), 3);
 120
 121         return 0;
 122 }
 123
 124 static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
 125 {
 126         int sy, ysize, hsize, i;
 127
 128         if (!on) {
 129                 for (i = 0; i < 16; i++)
 130                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 131                                        solo_vlines(solo_dev),
 132                                        solo_dev->video_hsize,
 133                                        solo_vlines(solo_dev), 0);
 134                 return 0;
 135         }
 136
 137         ysize = solo_vlines(solo_dev) / 4;
 138         hsize = solo_dev->video_hsize / 4;
 139
 140         for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
 141                 solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
 142                                sy + ysize, 5);
 143                 solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
 144                                hsize * 2, sy + ysize, 5);
 145                 solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
 146                                hsize * 3, sy + ysize, 5);
 147                 solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
 148                                solo_dev->video_hsize, sy + ysize, 5);
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
 155 {
 156         u8 ext_ch;
 157
 158         if (ch < solo_dev->nr_chans) {
 159                 solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
 160                                on ? 0 : solo_vlines(solo_dev),
 161                                solo_dev->video_hsize, solo_vlines(solo_dev),
 162                                on ? 1 : 0);
 163                 return 0;
 164         }
 165
 166         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 167                 return -EINVAL;
 168
 169         ext_ch = ch - solo_dev->nr_chans;
 170
 171         /* 4up's first */
 172         if (ext_ch < 4)
 173                 return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
 174
 175         /* Remaining case is 16up for 16-port */
 176         return solo_v4l2_ch_ext_16up(solo_dev, on);
 177 }
 178
 179 static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
 180 {
 181         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 182                 return -EINVAL;
 183
 184         erase_on(solo_dev);
 185
 186         solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
 187         solo_v4l2_ch(solo_dev, ch, 1);
 188
 189         solo_dev->cur_disp_ch = ch;
 190
 191         return 0;
 192 }
 193
 194 static void solo_fillbuf(struct solo_dev *solo_dev,
 195                          struct vb2_buffer *vb)
 196 {
 197         dma_addr_t vbuf;
 198         unsigned int fdma_addr;
 199         int error = -1;
 200         int i;
 201
 202         vbuf = vb2_dma_contig_plane_dma_addr(vb, 0);
 203         if (!vbuf)
 204                 goto finish_buf;
 205
 206         if (erase_off(solo_dev)) {
 207                 void *p = vb2_plane_vaddr(vb, 0);
 208                 int image_size = solo_image_size(solo_dev);
 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, vbuf, 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                 vb->v4l2_buf.sequence = solo_dev->sequence++;
 228                 v4l2_get_timestamp(&vb->v4l2_buf.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);
 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                 if (timeout == -ERESTARTSYS || kthread_should_stop())
 279                         break;
 280                 solo_thread_try(solo_dev);
 281                 try_to_freeze();
 282         }
 283
 284         remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
 285
 286         return 0;
 287 }
 288
 289 static int solo_start_thread(struct solo_dev *solo_dev)
 290 {
 291         int ret = 0;
 292
 293         solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
 294
 295         if (IS_ERR(solo_dev->kthread)) {
 296                 ret = PTR_ERR(solo_dev->kthread);
 297                 solo_dev->kthread = NULL;
 298                 return ret;
 299         }
 300         solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
 301
 302         return ret;
 303 }
 304
 305 static void solo_stop_thread(struct solo_dev *solo_dev)
 306 {
 307         if (!solo_dev->kthread)
 308                 return;
 309
 310         solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
 311         kthread_stop(solo_dev->kthread);
 312         solo_dev->kthread = NULL;
 313 }
 314
 315 static int solo_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
 316                            unsigned int *num_buffers, unsigned int *num_planes,
 317                            unsigned int sizes[], void *alloc_ctxs[])
 318 {
 319         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 320
 321         sizes[0] = solo_image_size(solo_dev);
 322         alloc_ctxs[0] = solo_dev->alloc_ctx;
 323         *num_planes = 1;
 324
 325         if (*num_buffers < MIN_VID_BUFFERS)
 326                 *num_buffers = MIN_VID_BUFFERS;
 327
 328         return 0;
 329 }
 330
 331 static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
 332 {
 333         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 334
 335         solo_dev->sequence = 0;
 336         return solo_start_thread(solo_dev);
 337 }
 338
 339 static int solo_stop_streaming(struct vb2_queue *q)
 340 {
 341         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 342
 343         solo_stop_thread(solo_dev);
 344         INIT_LIST_HEAD(&solo_dev->vidq_active);
 345         return 0;
 346 }
 347
 348 static void solo_buf_queue(struct vb2_buffer *vb)
 349 {
 350         struct vb2_queue *vq = vb->vb2_queue;
 351         struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
 352         struct solo_vb2_buf *solo_vb =
 353                 container_of(vb, struct solo_vb2_buf, vb);
 354
 355         spin_lock(&solo_dev->slock);
 356         list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
 357         spin_unlock(&solo_dev->slock);
 358         wake_up_interruptible(&solo_dev->disp_thread_wait);
 359 }
 360
 361 static const struct vb2_ops solo_video_qops = {
 362         .queue_setup    = solo_queue_setup,
 363         .buf_queue      = solo_buf_queue,
 364         .start_streaming = solo_start_streaming,
 365         .stop_streaming = solo_stop_streaming,
 366         .wait_prepare   = vb2_ops_wait_prepare,
 367         .wait_finish    = vb2_ops_wait_finish,
 368 };
 369
 370 static int solo_querycap(struct file *file, void  *priv,
 371                          struct v4l2_capability *cap)
 372 {
 373         struct solo_dev *solo_dev = video_drvdata(file);
 374
 375         strcpy(cap->driver, SOLO6X10_NAME);
 376         strcpy(cap->card, "Softlogic 6x10");
 377         snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
 378                  pci_name(solo_dev->pdev));
 379         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
 380                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 381         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 382         return 0;
 383 }
 384
 385 static int solo_enum_ext_input(struct solo_dev *solo_dev,
 386                                struct v4l2_input *input)
 387 {
 388         static const char * const dispnames_1[] = { "4UP" };
 389         static const char * const dispnames_2[] = { "4UP-1", "4UP-2" };
 390         static const char * const dispnames_5[] = {
 391                 "4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
 392         };
 393         const char * const *dispnames;
 394
 395         if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
 396                 return -EINVAL;
 397
 398         if (solo_dev->nr_ext == 5)
 399                 dispnames = dispnames_5;
 400         else if (solo_dev->nr_ext == 2)
 401                 dispnames = dispnames_2;
 402         else
 403                 dispnames = dispnames_1;
 404
 405         snprintf(input->name, sizeof(input->name), "Multi %s",
 406                  dispnames[input->index - solo_dev->nr_chans]);
 407
 408         return 0;
 409 }
 410
 411 static int solo_enum_input(struct file *file, void *priv,
 412                            struct v4l2_input *input)
 413 {
 414         struct solo_dev *solo_dev = video_drvdata(file);
 415
 416         if (input->index >= solo_dev->nr_chans) {
 417                 int ret = solo_enum_ext_input(solo_dev, input);
 418                 if (ret < 0)
 419                         return ret;
 420         } else {
 421                 snprintf(input->name, sizeof(input->name), "Camera %d",
 422                          input->index + 1);
 423
 424                 /* We can only check this for normal inputs */
 425                 if (!tw28_get_video_status(solo_dev, input->index))
 426                         input->status = V4L2_IN_ST_NO_SIGNAL;
 427         }
 428
 429         input->type = V4L2_INPUT_TYPE_CAMERA;
 430         input->std = solo_dev->vfd->tvnorms;
 431         return 0;
 432 }
 433
 434 static int solo_set_input(struct file *file, void *priv, unsigned int index)
 435 {
 436         struct solo_dev *solo_dev = video_drvdata(file);
 437         int ret = solo_v4l2_set_ch(solo_dev, index);
 438
 439         if (!ret) {
 440                 while (erase_off(solo_dev))
 441                         /* Do nothing */;
 442         }
 443
 444         return ret;
 445 }
 446
 447 static int solo_get_input(struct file *file, void *priv, unsigned int *index)
 448 {
 449         struct solo_dev *solo_dev = video_drvdata(file);
 450
 451         *index = solo_dev->cur_disp_ch;
 452
 453         return 0;
 454 }
 455
 456 static int solo_enum_fmt_cap(struct file *file, void *priv,
 457                              struct v4l2_fmtdesc *f)
 458 {
 459         if (f->index)
 460                 return -EINVAL;
 461
 462         f->pixelformat = V4L2_PIX_FMT_UYVY;
 463         strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));
 464
 465         return 0;
 466 }
 467
 468 static int solo_try_fmt_cap(struct file *file, void *priv,
 469                             struct v4l2_format *f)
 470 {
 471         struct solo_dev *solo_dev = video_drvdata(file);
 472         struct v4l2_pix_format *pix = &f->fmt.pix;
 473         int image_size = solo_image_size(solo_dev);
 474
 475         if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
 476                 return -EINVAL;
 477
 478         pix->width = solo_dev->video_hsize;
 479         pix->height = solo_vlines(solo_dev);
 480         pix->sizeimage = image_size;
 481         pix->field = V4L2_FIELD_INTERLACED;
 482         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 483         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 484         pix->priv = 0;
 485         return 0;
 486 }
 487
 488 static int solo_set_fmt_cap(struct file *file, void *priv,
 489                             struct v4l2_format *f)
 490 {
 491         struct solo_dev *solo_dev = video_drvdata(file);
 492
 493         if (vb2_is_busy(&solo_dev->vidq))
 494                 return -EBUSY;
 495
 496         /* For right now, if it doesn't match our running config,
 497          * then fail */
 498         return solo_try_fmt_cap(file, priv, f);
 499 }
 500
 501 static int solo_get_fmt_cap(struct file *file, void *priv,
 502                             struct v4l2_format *f)
 503 {
 504         struct solo_dev *solo_dev = video_drvdata(file);
 505         struct v4l2_pix_format *pix = &f->fmt.pix;
 506
 507         pix->width = solo_dev->video_hsize;
 508         pix->height = solo_vlines(solo_dev);
 509         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 510         pix->field = V4L2_FIELD_INTERLACED;
 511         pix->sizeimage = solo_image_size(solo_dev);
 512         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 513         pix->bytesperline = solo_bytesperline(solo_dev);
 514         pix->priv = 0;
 515
 516         return 0;
 517 }
 518
 519 static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
 520 {
 521         struct solo_dev *solo_dev = video_drvdata(file);
 522
 523         if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
 524                 *i = V4L2_STD_NTSC_M;
 525         else
 526                 *i = V4L2_STD_PAL;
 527         return 0;
 528 }
 529
 530 int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
 531 {
 532         int i;
 533
 534         /* Make sure all video nodes are idle */
 535         if (vb2_is_busy(&solo_dev->vidq))
 536                 return -EBUSY;
 537         for (i = 0; i < solo_dev->nr_chans; i++)
 538                 if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
 539                         return -EBUSY;
 540         solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
 541                                          SOLO_VO_FMT_TYPE_NTSC;
 542         /* Reconfigure for the new standard */
 543         solo_disp_init(solo_dev);
 544         solo_enc_init(solo_dev);
 545         solo_tw28_init(solo_dev);
 546         for (i = 0; i < solo_dev->nr_chans; i++)
 547                 solo_update_mode(solo_dev->v4l2_enc[i]);
 548         return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
 549 }
 550
 551 static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
 552 {
 553         struct solo_dev *solo_dev = video_drvdata(file);
 554
 555         return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
 556 }
 557
 558 static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
 559 {
 560         struct solo_dev *solo_dev =
 561                 container_of(ctrl->handler, struct solo_dev, disp_hdl);
 562
 563         switch (ctrl->id) {
 564         case V4L2_CID_MOTION_TRACE:
 565                 if (ctrl->val) {
 566                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
 567                                         SOLO_VI_MOTION_Y_ADD |
 568                                         SOLO_VI_MOTION_Y_VALUE(0x20) |
 569                                         SOLO_VI_MOTION_CB_VALUE(0x10) |
 570                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 571                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
 572                                         SOLO_VI_MOTION_CR_ADD |
 573                                         SOLO_VI_MOTION_Y_VALUE(0x10) |
 574                                         SOLO_VI_MOTION_CB_VALUE(0x80) |
 575                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 576                 } else {
 577                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
 578                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
 579                 }
 580                 return 0;
 581         default:
 582                 break;
 583         }
 584         return -EINVAL;
 585 }
 586
 587 static const struct v4l2_file_operations solo_v4l2_fops = {
 588         .owner                  = THIS_MODULE,
 589         .open                   = v4l2_fh_open,
 590         .release                = vb2_fop_release,
 591         .read                   = vb2_fop_read,
 592         .poll                   = vb2_fop_poll,
 593         .mmap                   = vb2_fop_mmap,
 594         .unlocked_ioctl         = video_ioctl2,
 595 };
 596
 597 static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
 598         .vidioc_querycap                = solo_querycap,
 599         .vidioc_s_std                   = solo_s_std,
 600         .vidioc_g_std                   = solo_g_std,
 601         /* Input callbacks */
 602         .vidioc_enum_input              = solo_enum_input,
 603         .vidioc_s_input                 = solo_set_input,
 604         .vidioc_g_input                 = solo_get_input,
 605         /* Video capture format callbacks */
 606         .vidioc_enum_fmt_vid_cap        = solo_enum_fmt_cap,
 607         .vidioc_try_fmt_vid_cap         = solo_try_fmt_cap,
 608         .vidioc_s_fmt_vid_cap           = solo_set_fmt_cap,
 609         .vidioc_g_fmt_vid_cap           = solo_get_fmt_cap,
 610         /* Streaming I/O */
 611         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 612         .vidioc_querybuf                = vb2_ioctl_querybuf,
 613         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 614         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 615         .vidioc_streamon                = vb2_ioctl_streamon,
 616         .vidioc_streamoff               = vb2_ioctl_streamoff,
 617         /* Logging and events */
 618         .vidioc_log_status              = v4l2_ctrl_log_status,
 619         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 620         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 621 };
 622
 623 static struct video_device solo_v4l2_template = {
 624         .name                   = SOLO6X10_NAME,
 625         .fops                   = &solo_v4l2_fops,
 626         .ioctl_ops              = &solo_v4l2_ioctl_ops,
 627         .minor                  = -1,
 628         .release                = video_device_release,
 629         .tvnorms                = V4L2_STD_NTSC_M | V4L2_STD_PAL,
 630 };
 631
 632 static const struct v4l2_ctrl_ops solo_ctrl_ops = {
 633         .s_ctrl = solo_s_ctrl,
 634 };
 635
 636 static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
 637         .ops = &solo_ctrl_ops,
 638         .id = V4L2_CID_MOTION_TRACE,
 639         .name = "Motion Detection Trace",
 640         .type = V4L2_CTRL_TYPE_BOOLEAN,
 641         .max = 1,
 642         .step = 1,
 643 };
 644
 645 int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 646 {
 647         int ret;
 648         int i;
 649
 650         init_waitqueue_head(&solo_dev->disp_thread_wait);
 651         spin_lock_init(&solo_dev->slock);
 652         mutex_init(&solo_dev->lock);
 653         INIT_LIST_HEAD(&solo_dev->vidq_active);
 654
 655         solo_dev->vfd = video_device_alloc();
 656         if (!solo_dev->vfd)
 657                 return -ENOMEM;
 658
 659         *solo_dev->vfd = solo_v4l2_template;
 660         solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
 661         solo_dev->vfd->queue = &solo_dev->vidq;
 662         solo_dev->vfd->lock = &solo_dev->lock;
 663         v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
 664         v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
 665         if (solo_dev->disp_hdl.error) {
 666                 ret = solo_dev->disp_hdl.error;
 667                 goto fail;
 668         }
 669         solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
 670         set_bit(V4L2_FL_USE_FH_PRIO, &solo_dev->vfd->flags);
 671
 672         video_set_drvdata(solo_dev->vfd, solo_dev);
 673
 674         solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 675         solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 676         solo_dev->vidq.ops = &solo_video_qops;
 677         solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
 678         solo_dev->vidq.drv_priv = solo_dev;
 679         solo_dev->vidq.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 680         solo_dev->vidq.gfp_flags = __GFP_DMA32;
 681         solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
 682         solo_dev->vidq.lock = &solo_dev->lock;
 683         ret = vb2_queue_init(&solo_dev->vidq);
 684         if (ret < 0)
 685                 goto fail;
 686
 687         solo_dev->alloc_ctx = vb2_dma_contig_init_ctx(&solo_dev->pdev->dev);
 688         if (IS_ERR(solo_dev->alloc_ctx)) {
 689                 dev_err(&solo_dev->pdev->dev, "Can't allocate buffer context");
 690                 return PTR_ERR(solo_dev->alloc_ctx);
 691         }
 692
 693         /* Cycle all the channels and clear */
 694         for (i = 0; i < solo_dev->nr_chans; i++) {
 695                 solo_v4l2_set_ch(solo_dev, i);
 696                 while (erase_off(solo_dev))
 697                         /* Do nothing */;
 698         }
 699
 700         /* Set the default display channel */
 701         solo_v4l2_set_ch(solo_dev, 0);
 702         while (erase_off(solo_dev))
 703                 /* Do nothing */;
 704
 705         ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
 706         if (ret < 0)
 707                 goto fail;
 708
 709         snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
 710                  SOLO6X10_NAME, solo_dev->vfd->num);
 711
 712         dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
 713                  "%d inputs (%d extended)\n", solo_dev->vfd->num,
 714                  solo_dev->nr_chans, solo_dev->nr_ext);
 715
 716         return 0;
 717
 718 fail:
 719         video_device_release(solo_dev->vfd);
 720         vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
 721         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 722         solo_dev->vfd = NULL;
 723         return ret;
 724 }
 725
 726 void solo_v4l2_exit(struct solo_dev *solo_dev)
 727 {
 728         if (solo_dev->vfd == NULL)
 729                 return;
 730
 731         video_unregister_device(solo_dev->vfd);
 732         vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
 733         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 734         solo_dev->vfd = NULL;
 735 }