drivers/media/platform/vsp1/vsp1_drv.c

   1 /*
   2  * vsp1_drv.c  --  R-Car VSP1 Driver
   3  *
   4  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/device.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_device.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/videodev2.h>
  23
  24 #include "vsp1.h"
  25 #include "vsp1_bru.h"
  26 #include "vsp1_hsit.h"
  27 #include "vsp1_lif.h"
  28 #include "vsp1_lut.h"
  29 #include "vsp1_rwpf.h"
  30 #include "vsp1_sru.h"
  31 #include "vsp1_uds.h"
  32 #include "vsp1_video.h"
  33
  34 /* -----------------------------------------------------------------------------
  35  * Interrupt Handling
  36  */
  37
  38 static irqreturn_t vsp1_irq_handler(int irq, void *data)
  39 {
  40         u32 mask = VI6_WFP_IRQ_STA_DFE | VI6_WFP_IRQ_STA_FRE;
  41         struct vsp1_device *vsp1 = data;
  42         irqreturn_t ret = IRQ_NONE;
  43         unsigned int i;
  44
  45         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
  46                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
  47                 struct vsp1_pipeline *pipe;
  48                 u32 status;
  49
  50                 if (wpf == NULL)
  51                         continue;
  52
  53                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
  54                 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
  55                 vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
  56
  57                 if (status & VI6_WFP_IRQ_STA_FRE) {
  58                         vsp1_pipeline_frame_end(pipe);
  59                         ret = IRQ_HANDLED;
  60                 }
  61         }
  62
  63         return ret;
  64 }
  65
  66 /* -----------------------------------------------------------------------------
  67  * Entities
  68  */
  69
  70 /*
  71  * vsp1_create_sink_links - Create links from all sources to the given sink
  72  *
  73  * This function creates media links from all valid sources to the given sink
  74  * pad. Links that would be invalid according to the VSP1 hardware capabilities
  75  * are skipped. Those include all links
  76  *
  77  * - from a UDS to a UDS (UDS entities can't be chained)
  78  * - from an entity to itself (no loops are allowed)
  79  */
  80 static int vsp1_create_sink_links(struct vsp1_device *vsp1,
  81                                   struct vsp1_entity *sink)
  82 {
  83         struct media_entity *entity = &sink->subdev.entity;
  84         struct vsp1_entity *source;
  85         unsigned int pad;
  86         int ret;
  87
  88         list_for_each_entry(source, &vsp1->entities, list_dev) {
  89                 u32 flags;
  90
  91                 if (source->type == sink->type)
  92                         continue;
  93
  94                 if (source->type == VSP1_ENTITY_LIF ||
  95                     source->type == VSP1_ENTITY_WPF)
  96                         continue;
  97
  98                 flags = source->type == VSP1_ENTITY_RPF &&
  99                         sink->type == VSP1_ENTITY_WPF &&
 100                         source->index == sink->index
 101                       ? MEDIA_LNK_FL_ENABLED : 0;
 102
 103                 for (pad = 0; pad < entity->num_pads; ++pad) {
 104                         if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
 105                                 continue;
 106
 107                         ret = media_create_pad_link(&source->subdev.entity,
 108                                                        source->source_pad,
 109                                                        entity, pad, flags);
 110                         if (ret < 0)
 111                                 return ret;
 112
 113                         if (flags & MEDIA_LNK_FL_ENABLED)
 114                                 source->sink = entity;
 115                 }
 116         }
 117
 118         return 0;
 119 }
 120
 121 static int vsp1_create_links(struct vsp1_device *vsp1)
 122 {
 123         struct vsp1_entity *entity;
 124         unsigned int i;
 125         int ret;
 126
 127         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 128                 if (entity->type == VSP1_ENTITY_LIF ||
 129                     entity->type == VSP1_ENTITY_RPF)
 130                         continue;
 131
 132                 ret = vsp1_create_sink_links(vsp1, entity);
 133                 if (ret < 0)
 134                         return ret;
 135         }
 136
 137         if (vsp1->pdata.features & VSP1_HAS_LIF) {
 138                 ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
 139                                             RWPF_PAD_SOURCE,
 140                                             &vsp1->lif->entity.subdev.entity,
 141                                             LIF_PAD_SINK, 0);
 142                 if (ret < 0)
 143                         return ret;
 144         }
 145
 146         for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
 147                 struct vsp1_rwpf *rpf = vsp1->rpf[i];
 148
 149                 ret = media_create_pad_link(&rpf->video->video.entity, 0,
 150                                             &rpf->entity.subdev.entity,
 151                                             RWPF_PAD_SINK,
 152                                             MEDIA_LNK_FL_ENABLED |
 153                                             MEDIA_LNK_FL_IMMUTABLE);
 154                 if (ret < 0)
 155                         return ret;
 156         }
 157
 158         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 159                 /* Connect the video device to the WPF. All connections are
 160                  * immutable except for the WPF0 source link if a LIF is
 161                  * present.
 162                  */
 163                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 164                 unsigned int flags = MEDIA_LNK_FL_ENABLED;
 165
 166                 if (!(vsp1->pdata.features & VSP1_HAS_LIF) || i != 0)
 167                         flags |= MEDIA_LNK_FL_IMMUTABLE;
 168
 169                 ret = media_create_pad_link(&wpf->entity.subdev.entity,
 170                                             RWPF_PAD_SOURCE,
 171                                             &wpf->video->video.entity, 0,
 172                                             flags);
 173                 if (ret < 0)
 174                         return ret;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static void vsp1_destroy_entities(struct vsp1_device *vsp1)
 181 {
 182         struct vsp1_entity *entity, *_entity;
 183         struct vsp1_video *video, *_video;
 184
 185         list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
 186                 list_del(&entity->list_dev);
 187                 vsp1_entity_destroy(entity);
 188         }
 189
 190         list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
 191                 list_del(&video->list);
 192                 vsp1_video_cleanup(video);
 193         }
 194
 195         v4l2_device_unregister(&vsp1->v4l2_dev);
 196         media_device_unregister(&vsp1->media_dev);
 197         media_device_cleanup(&vsp1->media_dev);
 198 }
 199
 200 static int vsp1_create_entities(struct vsp1_device *vsp1)
 201 {
 202         struct media_device *mdev = &vsp1->media_dev;
 203         struct v4l2_device *vdev = &vsp1->v4l2_dev;
 204         struct vsp1_entity *entity;
 205         unsigned int i;
 206         int ret;
 207
 208         mdev->dev = vsp1->dev;
 209         strlcpy(mdev->model, "VSP1", sizeof(mdev->model));
 210         snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
 211                  dev_name(mdev->dev));
 212         media_device_init(mdev);
 213
 214         vdev->mdev = mdev;
 215         ret = v4l2_device_register(vsp1->dev, vdev);
 216         if (ret < 0) {
 217                 dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
 218                         ret);
 219                 goto done;
 220         }
 221
 222         /* Instantiate all the entities. */
 223         if (vsp1->pdata.features & VSP1_HAS_BRU) {
 224                 vsp1->bru = vsp1_bru_create(vsp1);
 225                 if (IS_ERR(vsp1->bru)) {
 226                         ret = PTR_ERR(vsp1->bru);
 227                         goto done;
 228                 }
 229
 230                 list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
 231         }
 232
 233         vsp1->hsi = vsp1_hsit_create(vsp1, true);
 234         if (IS_ERR(vsp1->hsi)) {
 235                 ret = PTR_ERR(vsp1->hsi);
 236                 goto done;
 237         }
 238
 239         list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
 240
 241         vsp1->hst = vsp1_hsit_create(vsp1, false);
 242         if (IS_ERR(vsp1->hst)) {
 243                 ret = PTR_ERR(vsp1->hst);
 244                 goto done;
 245         }
 246
 247         list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
 248
 249         if (vsp1->pdata.features & VSP1_HAS_LIF) {
 250                 vsp1->lif = vsp1_lif_create(vsp1);
 251                 if (IS_ERR(vsp1->lif)) {
 252                         ret = PTR_ERR(vsp1->lif);
 253                         goto done;
 254                 }
 255
 256                 list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities);
 257         }
 258
 259         if (vsp1->pdata.features & VSP1_HAS_LUT) {
 260                 vsp1->lut = vsp1_lut_create(vsp1);
 261                 if (IS_ERR(vsp1->lut)) {
 262                         ret = PTR_ERR(vsp1->lut);
 263                         goto done;
 264                 }
 265
 266                 list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
 267         }
 268
 269         for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
 270                 struct vsp1_video *video;
 271                 struct vsp1_rwpf *rpf;
 272
 273                 rpf = vsp1_rpf_create(vsp1, i);
 274                 if (IS_ERR(rpf)) {
 275                         ret = PTR_ERR(rpf);
 276                         goto done;
 277                 }
 278
 279                 vsp1->rpf[i] = rpf;
 280                 list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
 281
 282                 video = vsp1_video_create(vsp1, rpf);
 283                 if (IS_ERR(video)) {
 284                         ret = PTR_ERR(video);
 285                         goto done;
 286                 }
 287
 288                 list_add_tail(&video->list, &vsp1->videos);
 289         }
 290
 291         if (vsp1->pdata.features & VSP1_HAS_SRU) {
 292                 vsp1->sru = vsp1_sru_create(vsp1);
 293                 if (IS_ERR(vsp1->sru)) {
 294                         ret = PTR_ERR(vsp1->sru);
 295                         goto done;
 296                 }
 297
 298                 list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
 299         }
 300
 301         for (i = 0; i < vsp1->pdata.uds_count; ++i) {
 302                 struct vsp1_uds *uds;
 303
 304                 uds = vsp1_uds_create(vsp1, i);
 305                 if (IS_ERR(uds)) {
 306                         ret = PTR_ERR(uds);
 307                         goto done;
 308                 }
 309
 310                 vsp1->uds[i] = uds;
 311                 list_add_tail(&uds->entity.list_dev, &vsp1->entities);
 312         }
 313
 314         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 315                 struct vsp1_video *video;
 316                 struct vsp1_rwpf *wpf;
 317
 318                 wpf = vsp1_wpf_create(vsp1, i);
 319                 if (IS_ERR(wpf)) {
 320                         ret = PTR_ERR(wpf);
 321                         goto done;
 322                 }
 323
 324                 vsp1->wpf[i] = wpf;
 325                 list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
 326
 327                 video = vsp1_video_create(vsp1, wpf);
 328                 if (IS_ERR(video)) {
 329                         ret = PTR_ERR(video);
 330                         goto done;
 331                 }
 332
 333                 list_add_tail(&video->list, &vsp1->videos);
 334                 wpf->entity.sink = &video->video.entity;
 335         }
 336
 337         /* Register all subdevs. */
 338         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 339                 ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
 340                                                   &entity->subdev);
 341                 if (ret < 0)
 342                         goto done;
 343         }
 344
 345         /* Create links. */
 346         ret = vsp1_create_links(vsp1);
 347         if (ret < 0)
 348                 goto done;
 349
 350         ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
 351         if (ret < 0)
 352                 goto done;
 353
 354         ret = media_device_register(mdev);
 355
 356 done:
 357         if (ret < 0)
 358                 vsp1_destroy_entities(vsp1);
 359
 360         return ret;
 361 }
 362
 363 static int vsp1_device_init(struct vsp1_device *vsp1)
 364 {
 365         unsigned int i;
 366         u32 status;
 367
 368         /* Reset any channel that might be running. */
 369         status = vsp1_read(vsp1, VI6_STATUS);
 370
 371         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 372                 unsigned int timeout;
 373
 374                 if (!(status & VI6_STATUS_SYS_ACT(i)))
 375                         continue;
 376
 377                 vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(i));
 378                 for (timeout = 10; timeout > 0; --timeout) {
 379                         status = vsp1_read(vsp1, VI6_STATUS);
 380                         if (!(status & VI6_STATUS_SYS_ACT(i)))
 381                                 break;
 382
 383                         usleep_range(1000, 2000);
 384                 }
 385
 386                 if (!timeout) {
 387                         dev_err(vsp1->dev, "failed to reset wpf.%u\n", i);
 388                         return -ETIMEDOUT;
 389                 }
 390         }
 391
 392         vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
 393                    (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
 394
 395         for (i = 0; i < vsp1->pdata.rpf_count; ++i)
 396                 vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
 397
 398         for (i = 0; i < vsp1->pdata.uds_count; ++i)
 399                 vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
 400
 401         vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
 402         vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
 403         vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
 404         vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
 405         vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
 406         vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
 407
 408         vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 409                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 410         vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 411                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 412
 413         return 0;
 414 }
 415
 416 /*
 417  * vsp1_device_get - Acquire the VSP1 device
 418  *
 419  * Increment the VSP1 reference count and initialize the device if the first
 420  * reference is taken.
 421  *
 422  * Return 0 on success or a negative error code otherwise.
 423  */
 424 int vsp1_device_get(struct vsp1_device *vsp1)
 425 {
 426         int ret = 0;
 427
 428         mutex_lock(&vsp1->lock);
 429         if (vsp1->ref_count > 0)
 430                 goto done;
 431
 432         ret = clk_prepare_enable(vsp1->clock);
 433         if (ret < 0)
 434                 goto done;
 435
 436         ret = vsp1_device_init(vsp1);
 437         if (ret < 0) {
 438                 clk_disable_unprepare(vsp1->clock);
 439                 goto done;
 440         }
 441
 442 done:
 443         if (!ret)
 444                 vsp1->ref_count++;
 445
 446         mutex_unlock(&vsp1->lock);
 447         return ret;
 448 }
 449
 450 /*
 451  * vsp1_device_put - Release the VSP1 device
 452  *
 453  * Decrement the VSP1 reference count and cleanup the device if the last
 454  * reference is released.
 455  */
 456 void vsp1_device_put(struct vsp1_device *vsp1)
 457 {
 458         mutex_lock(&vsp1->lock);
 459
 460         if (--vsp1->ref_count == 0)
 461                 clk_disable_unprepare(vsp1->clock);
 462
 463         mutex_unlock(&vsp1->lock);
 464 }
 465
 466 /* -----------------------------------------------------------------------------
 467  * Power Management
 468  */
 469
 470 #ifdef CONFIG_PM_SLEEP
 471 static int vsp1_pm_suspend(struct device *dev)
 472 {
 473         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 474
 475         WARN_ON(mutex_is_locked(&vsp1->lock));
 476
 477         if (vsp1->ref_count == 0)
 478                 return 0;
 479
 480         vsp1_pipelines_suspend(vsp1);
 481
 482         clk_disable_unprepare(vsp1->clock);
 483
 484         return 0;
 485 }
 486
 487 static int vsp1_pm_resume(struct device *dev)
 488 {
 489         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 490
 491         WARN_ON(mutex_is_locked(&vsp1->lock));
 492
 493         if (vsp1->ref_count == 0)
 494                 return 0;
 495
 496         clk_prepare_enable(vsp1->clock);
 497
 498         vsp1_pipelines_resume(vsp1);
 499
 500         return 0;
 501 }
 502 #endif
 503
 504 static const struct dev_pm_ops vsp1_pm_ops = {
 505         SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
 506 };
 507
 508 /* -----------------------------------------------------------------------------
 509  * Platform Driver
 510  */
 511
 512 static int vsp1_parse_dt(struct vsp1_device *vsp1)
 513 {
 514         struct device_node *np = vsp1->dev->of_node;
 515         struct vsp1_platform_data *pdata = &vsp1->pdata;
 516
 517         if (of_property_read_bool(np, "renesas,has-lif"))
 518                 pdata->features |= VSP1_HAS_LIF;
 519         if (of_property_read_bool(np, "renesas,has-lut"))
 520                 pdata->features |= VSP1_HAS_LUT;
 521         if (of_property_read_bool(np, "renesas,has-sru"))
 522                 pdata->features |= VSP1_HAS_SRU;
 523
 524         of_property_read_u32(np, "renesas,#rpf", &pdata->rpf_count);
 525         of_property_read_u32(np, "renesas,#uds", &pdata->uds_count);
 526         of_property_read_u32(np, "renesas,#wpf", &pdata->wpf_count);
 527
 528         if (pdata->rpf_count <= 0 || pdata->rpf_count > VSP1_MAX_RPF) {
 529                 dev_err(vsp1->dev, "invalid number of RPF (%u)\n",
 530                         pdata->rpf_count);
 531                 return -EINVAL;
 532         }
 533
 534         if (pdata->uds_count > VSP1_MAX_UDS) {
 535                 dev_err(vsp1->dev, "invalid number of UDS (%u)\n",
 536                         pdata->uds_count);
 537                 return -EINVAL;
 538         }
 539
 540         if (pdata->wpf_count <= 0 || pdata->wpf_count > VSP1_MAX_WPF) {
 541                 dev_err(vsp1->dev, "invalid number of WPF (%u)\n",
 542                         pdata->wpf_count);
 543                 return -EINVAL;
 544         }
 545
 546         pdata->features |= VSP1_HAS_BRU;
 547         pdata->num_bru_inputs = 4;
 548
 549         return 0;
 550 }
 551
 552 static int vsp1_probe(struct platform_device *pdev)
 553 {
 554         struct vsp1_device *vsp1;
 555         struct resource *irq;
 556         struct resource *io;
 557         int ret;
 558
 559         vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
 560         if (vsp1 == NULL)
 561                 return -ENOMEM;
 562
 563         vsp1->dev = &pdev->dev;
 564         mutex_init(&vsp1->lock);
 565         INIT_LIST_HEAD(&vsp1->entities);
 566         INIT_LIST_HEAD(&vsp1->videos);
 567
 568         ret = vsp1_parse_dt(vsp1);
 569         if (ret < 0)
 570                 return ret;
 571
 572         /* I/O, IRQ and clock resources */
 573         io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 574         vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
 575         if (IS_ERR(vsp1->mmio))
 576                 return PTR_ERR(vsp1->mmio);
 577
 578         vsp1->clock = devm_clk_get(&pdev->dev, NULL);
 579         if (IS_ERR(vsp1->clock)) {
 580                 dev_err(&pdev->dev, "failed to get clock\n");
 581                 return PTR_ERR(vsp1->clock);
 582         }
 583
 584         irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 585         if (!irq) {
 586                 dev_err(&pdev->dev, "missing IRQ\n");
 587                 return -EINVAL;
 588         }
 589
 590         ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
 591                               IRQF_SHARED, dev_name(&pdev->dev), vsp1);
 592         if (ret < 0) {
 593                 dev_err(&pdev->dev, "failed to request IRQ\n");
 594                 return ret;
 595         }
 596
 597         /* Instanciate entities */
 598         ret = vsp1_create_entities(vsp1);
 599         if (ret < 0) {
 600                 dev_err(&pdev->dev, "failed to create entities\n");
 601                 return ret;
 602         }
 603
 604         platform_set_drvdata(pdev, vsp1);
 605
 606         return 0;
 607 }
 608
 609 static int vsp1_remove(struct platform_device *pdev)
 610 {
 611         struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
 612
 613         vsp1_destroy_entities(vsp1);
 614
 615         return 0;
 616 }
 617
 618 static const struct of_device_id vsp1_of_match[] = {
 619         { .compatible = "renesas,vsp1" },
 620         { },
 621 };
 622
 623 static struct platform_driver vsp1_platform_driver = {
 624         .probe          = vsp1_probe,
 625         .remove         = vsp1_remove,
 626         .driver         = {
 627                 .name   = "vsp1",
 628                 .pm     = &vsp1_pm_ops,
 629                 .of_match_table = vsp1_of_match,
 630         },
 631 };
 632
 633 module_platform_driver(vsp1_platform_driver);
 634
 635 MODULE_ALIAS("vsp1");
 636 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 637 MODULE_DESCRIPTION("Renesas VSP1 Driver");
 638 MODULE_LICENSE("GPL");