drivers/media/platform/s3c-camif/camif-core.c

   1 /*
   2  * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
   3  *
   4  * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
   5  * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 2 of the License,
  10  * or (at your option) any later version.
  11  */
  12 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
  13
  14 #include <linux/bug.h>
  15 #include <linux/clk.h>
  16 #include <linux/delay.h>
  17 #include <linux/device.h>
  18 #include <linux/errno.h>
  19 #include <linux/gpio.h>
  20 #include <linux/i2c.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/io.h>
  23 #include <linux/kernel.h>
  24 #include <linux/list.h>
  25 #include <linux/module.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/slab.h>
  29 #include <linux/types.h>
  30 #include <linux/version.h>
  31
  32 #include <media/media-device.h>
  33 #include <media/v4l2-ctrls.h>
  34 #include <media/v4l2-ioctl.h>
  35 #include <media/videobuf2-v4l2.h>
  36 #include <media/videobuf2-dma-contig.h>
  37
  38 #include "camif-core.h"
  39
  40 static char *camif_clocks[CLK_MAX_NUM] = {
  41         /* HCLK CAMIF clock */
  42         [CLK_GATE]      = "camif",
  43         /* CAMIF / external camera sensor master clock */
  44         [CLK_CAM]       = "camera",
  45 };
  46
  47 static const struct camif_fmt camif_formats[] = {
  48         {
  49                 .name           = "YUV 4:2:2 planar, Y/Cb/Cr",
  50                 .fourcc         = V4L2_PIX_FMT_YUV422P,
  51                 .depth          = 16,
  52                 .ybpp           = 1,
  53                 .color          = IMG_FMT_YCBCR422P,
  54                 .colplanes      = 3,
  55                 .flags          = FMT_FL_S3C24XX_CODEC |
  56                                   FMT_FL_S3C64XX,
  57         }, {
  58                 .name           = "YUV 4:2:0 planar, Y/Cb/Cr",
  59                 .fourcc         = V4L2_PIX_FMT_YUV420,
  60                 .depth          = 12,
  61                 .ybpp           = 1,
  62                 .color          = IMG_FMT_YCBCR420,
  63                 .colplanes      = 3,
  64                 .flags          = FMT_FL_S3C24XX_CODEC |
  65                                   FMT_FL_S3C64XX,
  66         }, {
  67                 .name           = "YVU 4:2:0 planar, Y/Cr/Cb",
  68                 .fourcc         = V4L2_PIX_FMT_YVU420,
  69                 .depth          = 12,
  70                 .ybpp           = 1,
  71                 .color          = IMG_FMT_YCRCB420,
  72                 .colplanes      = 3,
  73                 .flags          = FMT_FL_S3C24XX_CODEC |
  74                                   FMT_FL_S3C64XX,
  75         }, {
  76                 .name           = "RGB565, 16 bpp",
  77                 .fourcc         = V4L2_PIX_FMT_RGB565X,
  78                 .depth          = 16,
  79                 .ybpp           = 2,
  80                 .color          = IMG_FMT_RGB565,
  81                 .colplanes      = 1,
  82                 .flags          = FMT_FL_S3C24XX_PREVIEW |
  83                                   FMT_FL_S3C64XX,
  84         }, {
  85                 .name           = "XRGB8888, 32 bpp",
  86                 .fourcc         = V4L2_PIX_FMT_RGB32,
  87                 .depth          = 32,
  88                 .ybpp           = 4,
  89                 .color          = IMG_FMT_XRGB8888,
  90                 .colplanes      = 1,
  91                 .flags          = FMT_FL_S3C24XX_PREVIEW |
  92                                   FMT_FL_S3C64XX,
  93         }, {
  94                 .name           = "BGR666",
  95                 .fourcc         = V4L2_PIX_FMT_BGR666,
  96                 .depth          = 32,
  97                 .ybpp           = 4,
  98                 .color          = IMG_FMT_RGB666,
  99                 .colplanes      = 1,
 100                 .flags          = FMT_FL_S3C64XX,
 101         }
 102 };
 103
 104 /**
 105  * s3c_camif_find_format() - lookup camif color format by fourcc or an index
 106  * @vp: video path (DMA) description (codec/preview)
 107  * @pixelformat: fourcc to match, ignored if null
 108  * @index: index to the camif_formats array, ignored if negative
 109  */
 110 const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
 111                                               const u32 *pixelformat,
 112                                               int index)
 113 {
 114         const struct camif_fmt *fmt, *def_fmt = NULL;
 115         unsigned int i;
 116         int id = 0;
 117
 118         if (index >= (int)ARRAY_SIZE(camif_formats))
 119                 return NULL;
 120
 121         for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
 122                 fmt = &camif_formats[i];
 123                 if (vp && !(vp->fmt_flags & fmt->flags))
 124                         continue;
 125                 if (pixelformat && fmt->fourcc == *pixelformat)
 126                         return fmt;
 127                 if (index == id)
 128                         def_fmt = fmt;
 129                 id++;
 130         }
 131         return def_fmt;
 132 }
 133
 134 static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
 135 {
 136         unsigned int sh = 6;
 137
 138         if (src >= 64 * tar)
 139                 return -EINVAL;
 140
 141         while (sh--) {
 142                 unsigned int tmp = 1 << sh;
 143                 if (src >= tar * tmp) {
 144                         *shift = sh, *ratio = tmp;
 145                         return 0;
 146                 }
 147         }
 148         *shift = 0, *ratio = 1;
 149         return 0;
 150 }
 151
 152 int s3c_camif_get_scaler_config(struct camif_vp *vp,
 153                                 struct camif_scaler *scaler)
 154 {
 155         struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
 156         int source_x = camif_crop->width;
 157         int source_y = camif_crop->height;
 158         int target_x = vp->out_frame.rect.width;
 159         int target_y = vp->out_frame.rect.height;
 160         int ret;
 161
 162         if (vp->rotation == 90 || vp->rotation == 270)
 163                 swap(target_x, target_y);
 164
 165         ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
 166                                       &scaler->h_shift);
 167         if (ret < 0)
 168                 return ret;
 169
 170         ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
 171                                       &scaler->v_shift);
 172         if (ret < 0)
 173                 return ret;
 174
 175         scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
 176         scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
 177
 178         scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
 179         scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
 180
 181         scaler->scaleup_h = (target_x >= source_x);
 182         scaler->scaleup_v = (target_y >= source_y);
 183
 184         scaler->copy = 0;
 185
 186         pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
 187                  scaler->pre_h_ratio, scaler->h_shift,
 188                  scaler->pre_v_ratio, scaler->v_shift);
 189
 190         pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
 191                  source_x, source_y, target_x, target_y,
 192                  scaler->scaleup_h, scaler->scaleup_v);
 193
 194         return 0;
 195 }
 196
 197 static int camif_register_sensor(struct camif_dev *camif)
 198 {
 199         struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
 200         struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
 201         struct i2c_adapter *adapter;
 202         struct v4l2_subdev_format format;
 203         struct v4l2_subdev *sd;
 204         int ret;
 205
 206         camif->sensor.sd = NULL;
 207
 208         if (sensor->i2c_board_info.addr == 0)
 209                 return -EINVAL;
 210
 211         adapter = i2c_get_adapter(sensor->i2c_bus_num);
 212         if (adapter == NULL) {
 213                 v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
 214                           sensor->i2c_bus_num);
 215                 return -EPROBE_DEFER;
 216         }
 217
 218         sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
 219                                        &sensor->i2c_board_info, NULL);
 220         if (sd == NULL) {
 221                 i2c_put_adapter(adapter);
 222                 v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
 223                           sensor->i2c_board_info.type);
 224                 return -EPROBE_DEFER;
 225         }
 226         camif->sensor.sd = sd;
 227
 228         v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
 229
 230         /* Get initial pixel format and set it at the camif sink pad */
 231         format.pad = 0;
 232         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 233         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
 234
 235         if (ret < 0)
 236                 return 0;
 237
 238         format.pad = CAMIF_SD_PAD_SINK;
 239         v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
 240
 241         v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
 242                   format.format.width, format.format.height,
 243                   format.format.code);
 244         return 0;
 245 }
 246
 247 static void camif_unregister_sensor(struct camif_dev *camif)
 248 {
 249         struct v4l2_subdev *sd = camif->sensor.sd;
 250         struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
 251         struct i2c_adapter *adapter;
 252
 253         if (client == NULL)
 254                 return;
 255
 256         adapter = client->adapter;
 257         v4l2_device_unregister_subdev(sd);
 258         camif->sensor.sd = NULL;
 259         i2c_unregister_device(client);
 260         i2c_put_adapter(adapter);
 261 }
 262
 263 static int camif_create_media_links(struct camif_dev *camif)
 264 {
 265         int i, ret;
 266
 267         ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
 268                                 &camif->subdev.entity, CAMIF_SD_PAD_SINK,
 269                                 MEDIA_LNK_FL_IMMUTABLE |
 270                                 MEDIA_LNK_FL_ENABLED);
 271         if (ret)
 272                 return ret;
 273
 274         for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
 275                 ret = media_create_pad_link(&camif->subdev.entity, i,
 276                                 &camif->vp[i - 1].vdev.entity, 0,
 277                                 MEDIA_LNK_FL_IMMUTABLE |
 278                                 MEDIA_LNK_FL_ENABLED);
 279         }
 280
 281         return ret;
 282 }
 283
 284 static int camif_register_video_nodes(struct camif_dev *camif)
 285 {
 286         int ret = s3c_camif_register_video_node(camif, VP_CODEC);
 287         if (ret < 0)
 288                 return ret;
 289
 290         return s3c_camif_register_video_node(camif, VP_PREVIEW);
 291 }
 292
 293 static void camif_unregister_video_nodes(struct camif_dev *camif)
 294 {
 295         s3c_camif_unregister_video_node(camif, VP_CODEC);
 296         s3c_camif_unregister_video_node(camif, VP_PREVIEW);
 297 }
 298
 299 static void camif_unregister_media_entities(struct camif_dev *camif)
 300 {
 301         camif_unregister_video_nodes(camif);
 302         camif_unregister_sensor(camif);
 303         s3c_camif_unregister_subdev(camif);
 304 }
 305
 306 /*
 307  * Media device
 308  */
 309 static int camif_media_dev_init(struct camif_dev *camif)
 310 {
 311         struct media_device *md = &camif->media_dev;
 312         struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
 313         unsigned int ip_rev = camif->variant->ip_revision;
 314         int ret;
 315
 316         memset(md, 0, sizeof(*md));
 317         snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
 318                  ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
 319         strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
 320         md->hw_revision = ip_rev;
 321
 322         md->dev = camif->dev;
 323
 324         strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
 325         v4l2_dev->mdev = md;
 326
 327         media_device_init(md);
 328
 329         ret = v4l2_device_register(camif->dev, v4l2_dev);
 330         if (ret < 0)
 331                 return ret;
 332
 333         return ret;
 334 }
 335
 336 static void camif_clk_put(struct camif_dev *camif)
 337 {
 338         int i;
 339
 340         for (i = 0; i < CLK_MAX_NUM; i++) {
 341                 if (IS_ERR(camif->clock[i]))
 342                         continue;
 343                 clk_unprepare(camif->clock[i]);
 344                 clk_put(camif->clock[i]);
 345                 camif->clock[i] = ERR_PTR(-EINVAL);
 346         }
 347 }
 348
 349 static int camif_clk_get(struct camif_dev *camif)
 350 {
 351         int ret, i;
 352
 353         for (i = 1; i < CLK_MAX_NUM; i++)
 354                 camif->clock[i] = ERR_PTR(-EINVAL);
 355
 356         for (i = 0; i < CLK_MAX_NUM; i++) {
 357                 camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
 358                 if (IS_ERR(camif->clock[i])) {
 359                         ret = PTR_ERR(camif->clock[i]);
 360                         goto err;
 361                 }
 362                 ret = clk_prepare(camif->clock[i]);
 363                 if (ret < 0) {
 364                         clk_put(camif->clock[i]);
 365                         camif->clock[i] = NULL;
 366                         goto err;
 367                 }
 368         }
 369         return 0;
 370 err:
 371         camif_clk_put(camif);
 372         dev_err(camif->dev, "failed to get clock: %s\n",
 373                 camif_clocks[i]);
 374         return ret;
 375 }
 376
 377 /*
 378  * The CAMIF device has two relatively independent data processing paths
 379  * that can source data from memory or the common camera input frontend.
 380  * Register interrupts for each data processing path (camif_vp).
 381  */
 382 static int camif_request_irqs(struct platform_device *pdev,
 383                               struct camif_dev *camif)
 384 {
 385         int irq, ret, i;
 386
 387         for (i = 0; i < CAMIF_VP_NUM; i++) {
 388                 struct camif_vp *vp = &camif->vp[i];
 389
 390                 init_waitqueue_head(&vp->irq_queue);
 391
 392                 irq = platform_get_irq(pdev, i);
 393                 if (irq <= 0) {
 394                         dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
 395                         return -ENXIO;
 396                 }
 397
 398                 ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
 399                                        0, dev_name(&pdev->dev), vp);
 400                 if (ret < 0) {
 401                         dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
 402                         break;
 403                 }
 404         }
 405
 406         return ret;
 407 }
 408
 409 static int s3c_camif_probe(struct platform_device *pdev)
 410 {
 411         struct device *dev = &pdev->dev;
 412         struct s3c_camif_plat_data *pdata = dev->platform_data;
 413         struct s3c_camif_drvdata *drvdata;
 414         struct camif_dev *camif;
 415         struct resource *mres;
 416         int ret = 0;
 417
 418         camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
 419         if (!camif)
 420                 return -ENOMEM;
 421
 422         spin_lock_init(&camif->slock);
 423         mutex_init(&camif->lock);
 424
 425         camif->dev = dev;
 426
 427         if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
 428                 dev_err(dev, "wrong platform data\n");
 429                 return -EINVAL;
 430         }
 431
 432         camif->pdata = *pdata;
 433         drvdata = (void *)platform_get_device_id(pdev)->driver_data;
 434         camif->variant = drvdata->variant;
 435
 436         mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 437
 438         camif->io_base = devm_ioremap_resource(dev, mres);
 439         if (IS_ERR(camif->io_base))
 440                 return PTR_ERR(camif->io_base);
 441
 442         ret = camif_request_irqs(pdev, camif);
 443         if (ret < 0)
 444                 return ret;
 445
 446         ret = pdata->gpio_get();
 447         if (ret < 0)
 448                 return ret;
 449
 450         ret = s3c_camif_create_subdev(camif);
 451         if (ret < 0)
 452                 goto err_sd;
 453
 454         ret = camif_clk_get(camif);
 455         if (ret < 0)
 456                 goto err_clk;
 457
 458         platform_set_drvdata(pdev, camif);
 459         clk_set_rate(camif->clock[CLK_CAM],
 460                         camif->pdata.sensor.clock_frequency);
 461
 462         dev_info(dev, "sensor clock frequency: %lu\n",
 463                  clk_get_rate(camif->clock[CLK_CAM]));
 464         /*
 465          * Set initial pixel format, resolution and crop rectangle.
 466          * Must be done before a sensor subdev is registered as some
 467          * settings are overrode with values from sensor subdev.
 468          */
 469         s3c_camif_set_defaults(camif);
 470
 471         pm_runtime_enable(dev);
 472
 473         ret = pm_runtime_get_sync(dev);
 474         if (ret < 0)
 475                 goto err_pm;
 476
 477         ret = camif_media_dev_init(camif);
 478         if (ret < 0)
 479                 goto err_alloc;
 480
 481         ret = camif_register_sensor(camif);
 482         if (ret < 0)
 483                 goto err_sens;
 484
 485         ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
 486         if (ret < 0)
 487                 goto err_sens;
 488
 489         ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
 490         if (ret < 0)
 491                 goto err_sens;
 492
 493         ret = camif_register_video_nodes(camif);
 494         if (ret < 0)
 495                 goto err_sens;
 496
 497         ret = camif_create_media_links(camif);
 498         if (ret < 0)
 499                 goto err_sens;
 500
 501         ret = media_device_register(&camif->media_dev);
 502         if (ret < 0)
 503                 goto err_sens;
 504
 505         pm_runtime_put(dev);
 506         return 0;
 507
 508 err_sens:
 509         v4l2_device_unregister(&camif->v4l2_dev);
 510         media_device_unregister(&camif->media_dev);
 511         media_device_cleanup(&camif->media_dev);
 512         camif_unregister_media_entities(camif);
 513 err_alloc:
 514         pm_runtime_put(dev);
 515         pm_runtime_disable(dev);
 516 err_pm:
 517         camif_clk_put(camif);
 518 err_clk:
 519         s3c_camif_unregister_subdev(camif);
 520 err_sd:
 521         pdata->gpio_put();
 522         return ret;
 523 }
 524
 525 static int s3c_camif_remove(struct platform_device *pdev)
 526 {
 527         struct camif_dev *camif = platform_get_drvdata(pdev);
 528         struct s3c_camif_plat_data *pdata = &camif->pdata;
 529
 530         media_device_unregister(&camif->media_dev);
 531         media_device_cleanup(&camif->media_dev);
 532         camif_unregister_media_entities(camif);
 533         v4l2_device_unregister(&camif->v4l2_dev);
 534
 535         pm_runtime_disable(&pdev->dev);
 536         camif_clk_put(camif);
 537         pdata->gpio_put();
 538
 539         return 0;
 540 }
 541
 542 static int s3c_camif_runtime_resume(struct device *dev)
 543 {
 544         struct camif_dev *camif = dev_get_drvdata(dev);
 545
 546         clk_enable(camif->clock[CLK_GATE]);
 547         /* null op on s3c244x */
 548         clk_enable(camif->clock[CLK_CAM]);
 549         return 0;
 550 }
 551
 552 static int s3c_camif_runtime_suspend(struct device *dev)
 553 {
 554         struct camif_dev *camif = dev_get_drvdata(dev);
 555
 556         /* null op on s3c244x */
 557         clk_disable(camif->clock[CLK_CAM]);
 558
 559         clk_disable(camif->clock[CLK_GATE]);
 560         return 0;
 561 }
 562
 563 static const struct s3c_camif_variant s3c244x_camif_variant = {
 564         .vp_pix_limits = {
 565                 [VP_CODEC] = {
 566                         .max_out_width          = 4096,
 567                         .max_sc_out_width       = 2048,
 568                         .out_width_align        = 16,
 569                         .min_out_width          = 16,
 570                         .max_height             = 4096,
 571                 },
 572                 [VP_PREVIEW] = {
 573                         .max_out_width          = 640,
 574                         .max_sc_out_width       = 640,
 575                         .out_width_align        = 16,
 576                         .min_out_width          = 16,
 577                         .max_height             = 480,
 578                 }
 579         },
 580         .pix_limits = {
 581                 .win_hor_offset_align   = 8,
 582         },
 583         .ip_revision = S3C244X_CAMIF_IP_REV,
 584 };
 585
 586 static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
 587         .variant        = &s3c244x_camif_variant,
 588         .bus_clk_freq   = 24000000UL,
 589 };
 590
 591 static const struct s3c_camif_variant s3c6410_camif_variant = {
 592         .vp_pix_limits = {
 593                 [VP_CODEC] = {
 594                         .max_out_width          = 4096,
 595                         .max_sc_out_width       = 2048,
 596                         .out_width_align        = 16,
 597                         .min_out_width          = 16,
 598                         .max_height             = 4096,
 599                 },
 600                 [VP_PREVIEW] = {
 601                         .max_out_width          = 4096,
 602                         .max_sc_out_width       = 720,
 603                         .out_width_align        = 16,
 604                         .min_out_width          = 16,
 605                         .max_height             = 4096,
 606                 }
 607         },
 608         .pix_limits = {
 609                 .win_hor_offset_align   = 8,
 610         },
 611         .ip_revision = S3C6410_CAMIF_IP_REV,
 612         .has_img_effect = 1,
 613         .vp_offset = 0x20,
 614 };
 615
 616 static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
 617         .variant        = &s3c6410_camif_variant,
 618         .bus_clk_freq   = 133000000UL,
 619 };
 620
 621 static const struct platform_device_id s3c_camif_driver_ids[] = {
 622         {
 623                 .name           = "s3c2440-camif",
 624                 .driver_data    = (unsigned long)&s3c244x_camif_drvdata,
 625         }, {
 626                 .name           = "s3c6410-camif",
 627                 .driver_data    = (unsigned long)&s3c6410_camif_drvdata,
 628         },
 629         { /* sentinel */ },
 630 };
 631 MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
 632
 633 static const struct dev_pm_ops s3c_camif_pm_ops = {
 634         .runtime_suspend        = s3c_camif_runtime_suspend,
 635         .runtime_resume         = s3c_camif_runtime_resume,
 636 };
 637
 638 static struct platform_driver s3c_camif_driver = {
 639         .probe          = s3c_camif_probe,
 640         .remove         = s3c_camif_remove,
 641         .id_table       = s3c_camif_driver_ids,
 642         .driver = {
 643                 .name   = S3C_CAMIF_DRIVER_NAME,
 644                 .pm     = &s3c_camif_pm_ops,
 645         }
 646 };
 647
 648 module_platform_driver(s3c_camif_driver);
 649
 650 MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
 651 MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
 652 MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
 653 MODULE_LICENSE("GPL");