linux/drivers/media/pci/solo6x10/solo6x10-v4l2.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
   4 *
   5 * Original author:
   6 * Ben Collins <bcollins@ubuntu.com>
   7 *
   8 * Additional work by:
   9 * John Brooks <john.brooks@bluecherry.net>
  10 */
  11
  12#include <linux/kernel.h>
  13#include <linux/module.h>
  14#include <linux/kthread.h>
  15#include <linux/freezer.h>
  16
  17#include <media/v4l2-ioctl.h>
  18#include <media/v4l2-common.h>
  19#include <media/v4l2-event.h>
  20#include <media/videobuf2-v4l2.h>
  21#include <media/videobuf2-dma-contig.h>
  22
  23#include "solo6x10.h"
  24#include "solo6x10-tw28.h"
  25
  26/* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
  27#define SOLO_HW_BPL             2048
  28#define solo_vlines(__solo)     (__solo->video_vsize * 2)
  29#define solo_image_size(__solo) (solo_bytesperline(__solo) * \
  30                                 solo_vlines(__solo))
  31#define solo_bytesperline(__solo) (__solo->video_hsize * 2)
  32
  33#define MIN_VID_BUFFERS         2
  34
  35static inline void erase_on(struct solo_dev *solo_dev)
  36{
  37        solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
  38        solo_dev->erasing = 1;
  39        solo_dev->frame_blank = 0;
  40}
  41
  42static inline int erase_off(struct solo_dev *solo_dev)
  43{
  44        if (!solo_dev->erasing)
  45                return 0;
  46
  47        /* First time around, assert erase off */
  48        if (!solo_dev->frame_blank)
  49                solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
  50        /* Keep the erasing flag on for 8 frames minimum */
  51        if (solo_dev->frame_blank++ >= 8)
  52                solo_dev->erasing = 0;
  53
  54        return 1;
  55}
  56
  57void solo_video_in_isr(struct solo_dev *solo_dev)
  58{
  59        wake_up_interruptible_all(&solo_dev->disp_thread_wait);
  60}
  61
  62static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
  63                           int sx, int sy, int ex, int ey, int scale)
  64{
  65        if (ch >= solo_dev->nr_chans)
  66                return;
  67
  68        /* Here, we just keep window/channel the same */
  69        solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
  70                       SOLO_VI_WIN_CHANNEL(ch) |
  71                       SOLO_VI_WIN_SX(sx) |
  72                       SOLO_VI_WIN_EX(ex) |
  73                       SOLO_VI_WIN_SCALE(scale));
  74
  75        solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
  76                       SOLO_VI_WIN_SY(sy) |
  77                       SOLO_VI_WIN_EY(ey));
  78}
  79
  80static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
  81{
  82        u8 ch = idx * 4;
  83
  84        if (ch >= solo_dev->nr_chans)
  85                return -EINVAL;
  86
  87        if (!on) {
  88                u8 i;
  89
  90                for (i = ch; i < ch + 4; i++)
  91                        solo_win_setup(solo_dev, i, solo_dev->video_hsize,
  92                                       solo_vlines(solo_dev),
  93                                       solo_dev->video_hsize,
  94                                       solo_vlines(solo_dev), 0);
  95                return 0;
  96        }
  97
  98        /* Row 1 */
  99        solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
 100                       solo_vlines(solo_dev) / 2, 3);
 101        solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
 102                       solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
 103        /* Row 2 */
 104        solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
 105                       solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
 106        solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
 107                       solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
 108                       solo_vlines(solo_dev), 3);
 109
 110        return 0;
 111}
 112
 113static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
 114{
 115        int sy, ysize, hsize, i;
 116
 117        if (!on) {
 118                for (i = 0; i < 16; i++)
 119                        solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 120                                       solo_vlines(solo_dev),
 121                                       solo_dev->video_hsize,
 122                                       solo_vlines(solo_dev), 0);
 123                return 0;
 124        }
 125
 126        ysize = solo_vlines(solo_dev) / 4;
 127        hsize = solo_dev->video_hsize / 4;
 128
 129        for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
 130                solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
 131                               sy + ysize, 5);
 132                solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
 133                               hsize * 2, sy + ysize, 5);
 134                solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
 135                               hsize * 3, sy + ysize, 5);
 136                solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
 137                               solo_dev->video_hsize, sy + ysize, 5);
 138        }
 139
 140        return 0;
 141}
 142
 143static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
 144{
 145        u8 ext_ch;
 146
 147        if (ch < solo_dev->nr_chans) {
 148                solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
 149                               on ? 0 : solo_vlines(solo_dev),
 150                               solo_dev->video_hsize, solo_vlines(solo_dev),
 151                               on ? 1 : 0);
 152                return 0;
 153        }
 154
 155        if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 156                return -EINVAL;
 157
 158        ext_ch = ch - solo_dev->nr_chans;
 159
 160        /* 4up's first */
 161        if (ext_ch < 4)
 162                return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
 163
 164        /* Remaining case is 16up for 16-port */
 165        return solo_v4l2_ch_ext_16up(solo_dev, on);
 166}
 167
 168static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
 169{
 170        if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 171                return -EINVAL;
 172
 173        erase_on(solo_dev);
 174
 175        solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
 176        solo_v4l2_ch(solo_dev, ch, 1);
 177
 178        solo_dev->cur_disp_ch = ch;
 179
 180        return 0;
 181}
 182
 183static void solo_fillbuf(struct solo_dev *solo_dev,
 184                         struct vb2_buffer *vb)
 185{
 186        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 187        dma_addr_t addr;
 188        unsigned int fdma_addr;
 189        int error = -1;
 190        int i;
 191
 192        addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 193        if (!addr)
 194                goto finish_buf;
 195
 196        if (erase_off(solo_dev)) {
 197                void *p = vb2_plane_vaddr(vb, 0);
 198                int image_size = solo_image_size(solo_dev);
 199
 200                for (i = 0; i < image_size; i += 2) {
 201                        ((u8 *)p)[i] = 0x80;
 202                        ((u8 *)p)[i + 1] = 0x00;
 203                }
 204                error = 0;
 205        } else {
 206                fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
 207                                (SOLO_HW_BPL * solo_vlines(solo_dev)));
 208
 209                error = solo_p2m_dma_t(solo_dev, 0, addr, fdma_addr,
 210                                       solo_bytesperline(solo_dev),
 211                                       solo_vlines(solo_dev), SOLO_HW_BPL);
 212        }
 213
 214finish_buf:
 215        if (!error) {
 216                vb2_set_plane_payload(vb, 0,
 217                        solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
 218                vbuf->sequence = solo_dev->sequence++;
 219                vb->timestamp = ktime_get_ns();
 220        }
 221
 222        vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 223}
 224
 225static void solo_thread_try(struct solo_dev *solo_dev)
 226{
 227        struct solo_vb2_buf *vb;
 228
 229        /* Only "break" from this loop if slock is held, otherwise
 230         * just return. */
 231        for (;;) {
 232                unsigned int cur_write;
 233
 234                cur_write = SOLO_VI_STATUS0_PAGE(
 235                        solo_reg_read(solo_dev, SOLO_VI_STATUS0));
 236                if (cur_write == solo_dev->old_write)
 237                        return;
 238
 239                spin_lock(&solo_dev->slock);
 240
 241                if (list_empty(&solo_dev->vidq_active))
 242                        break;
 243
 244                vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
 245                                      list);
 246
 247                solo_dev->old_write = cur_write;
 248                list_del(&vb->list);
 249
 250                spin_unlock(&solo_dev->slock);
 251
 252                solo_fillbuf(solo_dev, &vb->vb.vb2_buf);
 253        }
 254
 255        assert_spin_locked(&solo_dev->slock);
 256        spin_unlock(&solo_dev->slock);
 257}
 258
 259static int solo_thread(void *data)
 260{
 261        struct solo_dev *solo_dev = data;
 262        DECLARE_WAITQUEUE(wait, current);
 263
 264        set_freezable();
 265        add_wait_queue(&solo_dev->disp_thread_wait, &wait);
 266
 267        for (;;) {
 268                long timeout = schedule_timeout_interruptible(HZ);
 269
 270                if (timeout == -ERESTARTSYS || kthread_should_stop())
 271                        break;
 272                solo_thread_try(solo_dev);
 273                try_to_freeze();
 274        }
 275
 276        remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
 277
 278        return 0;
 279}
 280
 281static int solo_start_thread(struct solo_dev *solo_dev)
 282{
 283        int ret = 0;
 284
 285        solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
 286
 287        if (IS_ERR(solo_dev->kthread)) {
 288                ret = PTR_ERR(solo_dev->kthread);
 289                solo_dev->kthread = NULL;
 290                return ret;
 291        }
 292        solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
 293
 294        return ret;
 295}
 296
 297static void solo_stop_thread(struct solo_dev *solo_dev)
 298{
 299        if (!solo_dev->kthread)
 300                return;
 301
 302        solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
 303        kthread_stop(solo_dev->kthread);
 304        solo_dev->kthread = NULL;
 305}
 306
 307static int solo_queue_setup(struct vb2_queue *q,
 308                           unsigned int *num_buffers, unsigned int *num_planes,
 309                           unsigned int sizes[], struct device *alloc_devs[])
 310{
 311        struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 312
 313        sizes[0] = solo_image_size(solo_dev);
 314        *num_planes = 1;
 315
 316        if (*num_buffers < MIN_VID_BUFFERS)
 317                *num_buffers = MIN_VID_BUFFERS;
 318
 319        return 0;
 320}
 321
 322static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
 323{
 324        struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 325
 326        solo_dev->sequence = 0;
 327        return solo_start_thread(solo_dev);
 328}
 329
 330static void solo_stop_streaming(struct vb2_queue *q)
 331{
 332        struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 333
 334        solo_stop_thread(solo_dev);
 335
 336        spin_lock(&solo_dev->slock);
 337        while (!list_empty(&solo_dev->vidq_active)) {
 338                struct solo_vb2_buf *buf = list_entry(
 339                                solo_dev->vidq_active.next,
 340                                struct solo_vb2_buf, list);
 341
 342                list_del(&buf->list);
 343                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 344        }
 345        spin_unlock(&solo_dev->slock);
 346        INIT_LIST_HEAD(&solo_dev->vidq_active);
 347}
 348
 349static void solo_buf_queue(struct vb2_buffer *vb)
 350{
 351        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 352        struct vb2_queue *vq = vb->vb2_queue;
 353        struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
 354        struct solo_vb2_buf *solo_vb =
 355                container_of(vbuf, struct solo_vb2_buf, vb);
 356
 357        spin_lock(&solo_dev->slock);
 358        list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
 359        spin_unlock(&solo_dev->slock);
 360        wake_up_interruptible(&solo_dev->disp_thread_wait);
 361}
 362
 363static const struct vb2_ops solo_video_qops = {
 364        .queue_setup    = solo_queue_setup,
 365        .buf_queue      = solo_buf_queue,
 366        .start_streaming = solo_start_streaming,
 367        .stop_streaming = solo_stop_streaming,
 368        .wait_prepare   = vb2_ops_wait_prepare,
 369        .wait_finish    = vb2_ops_wait_finish,
 370};
 371
 372static int solo_querycap(struct file *file, void  *priv,
 373                         struct v4l2_capability *cap)
 374{
 375        struct solo_dev *solo_dev = video_drvdata(file);
 376
 377        strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver));
 378        strscpy(cap->card, "Softlogic 6x10", sizeof(cap->card));
 379        snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
 380                 pci_name(solo_dev->pdev));
 381        return 0;
 382}
 383
 384static int solo_enum_ext_input(struct solo_dev *solo_dev,
 385                               struct v4l2_input *input)
 386{
 387        int ext = input->index - solo_dev->nr_chans;
 388        unsigned int nup, first;
 389
 390        if (ext >= solo_dev->nr_ext)
 391                return -EINVAL;
 392
 393        nup   = (ext == 4) ? 16 : 4;
 394        first = (ext & 3) << 2; /* first channel in the n-up */
 395        snprintf(input->name, sizeof(input->name),
 396                 "Multi %d-up (cameras %d-%d)",
 397                 nup, first + 1, first + nup);
 398        /* Possible outputs:
 399         *  Multi 4-up (cameras 1-4)
 400         *  Multi 4-up (cameras 5-8)
 401         *  Multi 4-up (cameras 9-12)
 402         *  Multi 4-up (cameras 13-16)
 403         *  Multi 16-up (cameras 1-16)
 404         */
 405        return 0;
 406}
 407
 408static int solo_enum_input(struct file *file, void *priv,
 409                           struct v4l2_input *input)
 410{
 411        struct solo_dev *solo_dev = video_drvdata(file);
 412
 413        if (input->index >= solo_dev->nr_chans) {
 414                int ret = solo_enum_ext_input(solo_dev, input);
 415
 416                if (ret < 0)
 417                        return ret;
 418        } else {
 419                snprintf(input->name, sizeof(input->name), "Camera %d",
 420                         input->index + 1);
 421
 422                /* We can only check this for normal inputs */
 423                if (!tw28_get_video_status(solo_dev, input->index))
 424                        input->status = V4L2_IN_ST_NO_SIGNAL;
 425        }
 426
 427        input->type = V4L2_INPUT_TYPE_CAMERA;
 428        input->std = solo_dev->vfd->tvnorms;
 429        return 0;
 430}
 431
 432static int solo_set_input(struct file *file, void *priv, unsigned int index)
 433{
 434        struct solo_dev *solo_dev = video_drvdata(file);
 435        int ret = solo_v4l2_set_ch(solo_dev, index);
 436
 437        if (!ret) {
 438                while (erase_off(solo_dev))
 439                        /* Do nothing */;
 440        }
 441
 442        return ret;
 443}
 444
 445static int solo_get_input(struct file *file, void *priv, unsigned int *index)
 446{
 447        struct solo_dev *solo_dev = video_drvdata(file);
 448
 449        *index = solo_dev->cur_disp_ch;
 450
 451        return 0;
 452}
 453
 454static int solo_enum_fmt_cap(struct file *file, void *priv,
 455                             struct v4l2_fmtdesc *f)
 456{
 457        if (f->index)
 458                return -EINVAL;
 459
 460        f->pixelformat = V4L2_PIX_FMT_UYVY;
 461        return 0;
 462}
 463
 464static int solo_try_fmt_cap(struct file *file, void *priv,
 465                            struct v4l2_format *f)
 466{
 467        struct solo_dev *solo_dev = video_drvdata(file);
 468        struct v4l2_pix_format *pix = &f->fmt.pix;
 469        int image_size = solo_image_size(solo_dev);
 470
 471        if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
 472                return -EINVAL;
 473
 474        pix->width = solo_dev->video_hsize;
 475        pix->height = solo_vlines(solo_dev);
 476        pix->sizeimage = image_size;
 477        pix->field = V4L2_FIELD_INTERLACED;
 478        pix->pixelformat = V4L2_PIX_FMT_UYVY;
 479        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 480        return 0;
 481}
 482
 483static int solo_set_fmt_cap(struct file *file, void *priv,
 484                            struct v4l2_format *f)
 485{
 486        struct solo_dev *solo_dev = video_drvdata(file);
 487
 488        if (vb2_is_busy(&solo_dev->vidq))
 489                return -EBUSY;
 490
 491        /* For right now, if it doesn't match our running config,
 492         * then fail */
 493        return solo_try_fmt_cap(file, priv, f);
 494}
 495
 496static int solo_get_fmt_cap(struct file *file, void *priv,
 497                            struct v4l2_format *f)
 498{
 499        struct solo_dev *solo_dev = video_drvdata(file);
 500        struct v4l2_pix_format *pix = &f->fmt.pix;
 501
 502        pix->width = solo_dev->video_hsize;
 503        pix->height = solo_vlines(solo_dev);
 504        pix->pixelformat = V4L2_PIX_FMT_UYVY;
 505        pix->field = V4L2_FIELD_INTERLACED;
 506        pix->sizeimage = solo_image_size(solo_dev);
 507        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 508        pix->bytesperline = solo_bytesperline(solo_dev);
 509
 510        return 0;
 511}
 512
 513static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
 514{
 515        struct solo_dev *solo_dev = video_drvdata(file);
 516
 517        if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
 518                *i = V4L2_STD_NTSC_M;
 519        else
 520                *i = V4L2_STD_PAL;
 521        return 0;
 522}
 523
 524int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
 525{
 526        int i;
 527
 528        /* Make sure all video nodes are idle */
 529        if (vb2_is_busy(&solo_dev->vidq))
 530                return -EBUSY;
 531        for (i = 0; i < solo_dev->nr_chans; i++)
 532                if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
 533                        return -EBUSY;
 534        solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
 535                                         SOLO_VO_FMT_TYPE_NTSC;
 536        /* Reconfigure for the new standard */
 537        solo_disp_init(solo_dev);
 538        solo_enc_init(solo_dev);
 539        solo_tw28_init(solo_dev);
 540        for (i = 0; i < solo_dev->nr_chans; i++)
 541                solo_update_mode(solo_dev->v4l2_enc[i]);
 542        return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
 543}
 544
 545static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
 546{
 547        struct solo_dev *solo_dev = video_drvdata(file);
 548
 549        return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
 550}
 551
 552static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
 553{
 554        struct solo_dev *solo_dev =
 555                container_of(ctrl->handler, struct solo_dev, disp_hdl);
 556
 557        switch (ctrl->id) {
 558        case V4L2_CID_MOTION_TRACE:
 559                if (ctrl->val) {
 560                        solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
 561                                        SOLO_VI_MOTION_Y_ADD |
 562                                        SOLO_VI_MOTION_Y_VALUE(0x20) |
 563                                        SOLO_VI_MOTION_CB_VALUE(0x10) |
 564                                        SOLO_VI_MOTION_CR_VALUE(0x10));
 565                        solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
 566                                        SOLO_VI_MOTION_CR_ADD |
 567                                        SOLO_VI_MOTION_Y_VALUE(0x10) |
 568                                        SOLO_VI_MOTION_CB_VALUE(0x80) |
 569                                        SOLO_VI_MOTION_CR_VALUE(0x10));
 570                } else {
 571                        solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
 572                        solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
 573                }
 574                return 0;
 575        default:
 576                break;
 577        }
 578        return -EINVAL;
 579}
 580
 581static const struct v4l2_file_operations solo_v4l2_fops = {
 582        .owner                  = THIS_MODULE,
 583        .open                   = v4l2_fh_open,
 584        .release                = vb2_fop_release,
 585        .read                   = vb2_fop_read,
 586        .poll                   = vb2_fop_poll,
 587        .mmap                   = vb2_fop_mmap,
 588        .unlocked_ioctl         = video_ioctl2,
 589};
 590
 591static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
 592        .vidioc_querycap                = solo_querycap,
 593        .vidioc_s_std                   = solo_s_std,
 594        .vidioc_g_std                   = solo_g_std,
 595        /* Input callbacks */
 596        .vidioc_enum_input              = solo_enum_input,
 597        .vidioc_s_input                 = solo_set_input,
 598        .vidioc_g_input                 = solo_get_input,
 599        /* Video capture format callbacks */
 600        .vidioc_enum_fmt_vid_cap        = solo_enum_fmt_cap,
 601        .vidioc_try_fmt_vid_cap         = solo_try_fmt_cap,
 602        .vidioc_s_fmt_vid_cap           = solo_set_fmt_cap,
 603        .vidioc_g_fmt_vid_cap           = solo_get_fmt_cap,
 604        /* Streaming I/O */
 605        .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 606        .vidioc_querybuf                = vb2_ioctl_querybuf,
 607        .vidioc_qbuf                    = vb2_ioctl_qbuf,
 608        .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 609        .vidioc_streamon                = vb2_ioctl_streamon,
 610        .vidioc_streamoff               = vb2_ioctl_streamoff,
 611        /* Logging and events */
 612        .vidioc_log_status              = v4l2_ctrl_log_status,
 613        .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 614        .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 615};
 616
 617static const struct video_device solo_v4l2_template = {
 618        .name                   = SOLO6X10_NAME,
 619        .fops                   = &solo_v4l2_fops,
 620        .ioctl_ops              = &solo_v4l2_ioctl_ops,
 621        .minor                  = -1,
 622        .release                = video_device_release,
 623        .tvnorms                = V4L2_STD_NTSC_M | V4L2_STD_PAL,
 624        .device_caps            = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 625                                  V4L2_CAP_STREAMING,
 626};
 627
 628static const struct v4l2_ctrl_ops solo_ctrl_ops = {
 629        .s_ctrl = solo_s_ctrl,
 630};
 631
 632static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
 633        .ops = &solo_ctrl_ops,
 634        .id = V4L2_CID_MOTION_TRACE,
 635        .name = "Motion Detection Trace",
 636        .type = V4L2_CTRL_TYPE_BOOLEAN,
 637        .max = 1,
 638        .step = 1,
 639};
 640
 641int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 642{
 643        int ret;
 644        int i;
 645
 646        init_waitqueue_head(&solo_dev->disp_thread_wait);
 647        spin_lock_init(&solo_dev->slock);
 648        mutex_init(&solo_dev->lock);
 649        INIT_LIST_HEAD(&solo_dev->vidq_active);
 650
 651        solo_dev->vfd = video_device_alloc();
 652        if (!solo_dev->vfd)
 653                return -ENOMEM;
 654
 655        *solo_dev->vfd = solo_v4l2_template;
 656        solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
 657        solo_dev->vfd->queue = &solo_dev->vidq;
 658        solo_dev->vfd->lock = &solo_dev->lock;
 659        v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
 660        v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
 661        if (solo_dev->disp_hdl.error) {
 662                ret = solo_dev->disp_hdl.error;
 663                goto fail;
 664        }
 665        solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
 666
 667        video_set_drvdata(solo_dev->vfd, solo_dev);
 668
 669        solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 670        solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 671        solo_dev->vidq.ops = &solo_video_qops;
 672        solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
 673        solo_dev->vidq.drv_priv = solo_dev;
 674        solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 675        solo_dev->vidq.gfp_flags = __GFP_DMA32 | __GFP_KSWAPD_RECLAIM;
 676        solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
 677        solo_dev->vidq.lock = &solo_dev->lock;
 678        solo_dev->vidq.dev = &solo_dev->pdev->dev;
 679        ret = vb2_queue_init(&solo_dev->vidq);
 680        if (ret < 0)
 681                goto fail;
 682
 683        /* Cycle all the channels and clear */
 684        for (i = 0; i < solo_dev->nr_chans; i++) {
 685                solo_v4l2_set_ch(solo_dev, i);
 686                while (erase_off(solo_dev))
 687                        /* Do nothing */;
 688        }
 689
 690        /* Set the default display channel */
 691        solo_v4l2_set_ch(solo_dev, 0);
 692        while (erase_off(solo_dev))
 693                /* Do nothing */;
 694
 695        ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
 696        if (ret < 0)
 697                goto fail;
 698
 699        snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
 700                 SOLO6X10_NAME, solo_dev->vfd->num);
 701
 702        dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with %d inputs (%d extended)\n",
 703                 solo_dev->vfd->num,
 704                 solo_dev->nr_chans, solo_dev->nr_ext);
 705
 706        return 0;
 707
 708fail:
 709        video_device_release(solo_dev->vfd);
 710        v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 711        solo_dev->vfd = NULL;
 712        return ret;
 713}
 714
 715void solo_v4l2_exit(struct solo_dev *solo_dev)
 716{
 717        if (solo_dev->vfd == NULL)
 718                return;
 719
 720        video_unregister_device(solo_dev->vfd);
 721        v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 722        solo_dev->vfd = NULL;
 723}
 724