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 <media/v4l2-subdev.h>
  25
  26 #include "vsp1.h"
  27 #include "vsp1_bru.h"
  28 #include "vsp1_dl.h"
  29 #include "vsp1_drm.h"
  30 #include "vsp1_hsit.h"
  31 #include "vsp1_lif.h"
  32 #include "vsp1_lut.h"
  33 #include "vsp1_pipe.h"
  34 #include "vsp1_rwpf.h"
  35 #include "vsp1_sru.h"
  36 #include "vsp1_uds.h"
  37 #include "vsp1_video.h"
  38
  39 /* -----------------------------------------------------------------------------
  40  * Interrupt Handling
  41  */
  42
  43 static irqreturn_t vsp1_irq_handler(int irq, void *data)
  44 {
  45         u32 mask = VI6_WFP_IRQ_STA_DFE | VI6_WFP_IRQ_STA_FRE;
  46         struct vsp1_device *vsp1 = data;
  47         irqreturn_t ret = IRQ_NONE;
  48         unsigned int i;
  49         u32 status;
  50
  51         for (i = 0; i < vsp1->info->wpf_count; ++i) {
  52                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
  53
  54                 if (wpf == NULL)
  55                         continue;
  56
  57                 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
  58                 vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
  59
  60                 if (status & VI6_WFP_IRQ_STA_FRE) {
  61                         vsp1_pipeline_frame_end(wpf->pipe);
  62                         ret = IRQ_HANDLED;
  63                 }
  64         }
  65
  66         status = vsp1_read(vsp1, VI6_DISP_IRQ_STA);
  67         vsp1_write(vsp1, VI6_DISP_IRQ_STA, ~status & VI6_DISP_IRQ_STA_DST);
  68
  69         if (status & VI6_DISP_IRQ_STA_DST) {
  70                 vsp1_drm_display_start(vsp1);
  71                 ret = IRQ_HANDLED;
  72         }
  73
  74         return ret;
  75 }
  76
  77 /* -----------------------------------------------------------------------------
  78  * Entities
  79  */
  80
  81 /*
  82  * vsp1_create_sink_links - Create links from all sources to the given sink
  83  *
  84  * This function creates media links from all valid sources to the given sink
  85  * pad. Links that would be invalid according to the VSP1 hardware capabilities
  86  * are skipped. Those include all links
  87  *
  88  * - from a UDS to a UDS (UDS entities can't be chained)
  89  * - from an entity to itself (no loops are allowed)
  90  */
  91 static int vsp1_create_sink_links(struct vsp1_device *vsp1,
  92                                   struct vsp1_entity *sink)
  93 {
  94         struct media_entity *entity = &sink->subdev.entity;
  95         struct vsp1_entity *source;
  96         unsigned int pad;
  97         int ret;
  98
  99         list_for_each_entry(source, &vsp1->entities, list_dev) {
 100                 u32 flags;
 101
 102                 if (source->type == sink->type)
 103                         continue;
 104
 105                 if (source->type == VSP1_ENTITY_LIF ||
 106                     source->type == VSP1_ENTITY_WPF)
 107                         continue;
 108
 109                 flags = source->type == VSP1_ENTITY_RPF &&
 110                         sink->type == VSP1_ENTITY_WPF &&
 111                         source->index == sink->index
 112                       ? MEDIA_LNK_FL_ENABLED : 0;
 113
 114                 for (pad = 0; pad < entity->num_pads; ++pad) {
 115                         if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
 116                                 continue;
 117
 118                         ret = media_create_pad_link(&source->subdev.entity,
 119                                                        source->source_pad,
 120                                                        entity, pad, flags);
 121                         if (ret < 0)
 122                                 return ret;
 123
 124                         if (flags & MEDIA_LNK_FL_ENABLED)
 125                                 source->sink = entity;
 126                 }
 127         }
 128
 129         return 0;
 130 }
 131
 132 static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
 133 {
 134         struct vsp1_entity *entity;
 135         unsigned int i;
 136         int ret;
 137
 138         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 139                 if (entity->type == VSP1_ENTITY_LIF ||
 140                     entity->type == VSP1_ENTITY_RPF)
 141                         continue;
 142
 143                 ret = vsp1_create_sink_links(vsp1, entity);
 144                 if (ret < 0)
 145                         return ret;
 146         }
 147
 148         if (vsp1->info->features & VSP1_HAS_LIF) {
 149                 ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
 150                                             RWPF_PAD_SOURCE,
 151                                             &vsp1->lif->entity.subdev.entity,
 152                                             LIF_PAD_SINK, 0);
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156
 157         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 158                 struct vsp1_rwpf *rpf = vsp1->rpf[i];
 159
 160                 ret = media_create_pad_link(&rpf->video->video.entity, 0,
 161                                             &rpf->entity.subdev.entity,
 162                                             RWPF_PAD_SINK,
 163                                             MEDIA_LNK_FL_ENABLED |
 164                                             MEDIA_LNK_FL_IMMUTABLE);
 165                 if (ret < 0)
 166                         return ret;
 167         }
 168
 169         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 170                 /* Connect the video device to the WPF. All connections are
 171                  * immutable except for the WPF0 source link if a LIF is
 172                  * present.
 173                  */
 174                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 175                 unsigned int flags = MEDIA_LNK_FL_ENABLED;
 176
 177                 if (!(vsp1->info->features & VSP1_HAS_LIF) || i != 0)
 178                         flags |= MEDIA_LNK_FL_IMMUTABLE;
 179
 180                 ret = media_create_pad_link(&wpf->entity.subdev.entity,
 181                                             RWPF_PAD_SOURCE,
 182                                             &wpf->video->video.entity, 0,
 183                                             flags);
 184                 if (ret < 0)
 185                         return ret;
 186         }
 187
 188         return 0;
 189 }
 190
 191 static void vsp1_destroy_entities(struct vsp1_device *vsp1)
 192 {
 193         struct vsp1_entity *entity, *_entity;
 194         struct vsp1_video *video, *_video;
 195
 196         list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
 197                 list_del(&entity->list_dev);
 198                 vsp1_entity_destroy(entity);
 199         }
 200
 201         list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
 202                 list_del(&video->list);
 203                 vsp1_video_cleanup(video);
 204         }
 205
 206         v4l2_device_unregister(&vsp1->v4l2_dev);
 207         media_device_unregister(&vsp1->media_dev);
 208         media_device_cleanup(&vsp1->media_dev);
 209
 210         if (!vsp1->info->uapi)
 211                 vsp1_drm_cleanup(vsp1);
 212 }
 213
 214 static int vsp1_create_entities(struct vsp1_device *vsp1)
 215 {
 216         struct media_device *mdev = &vsp1->media_dev;
 217         struct v4l2_device *vdev = &vsp1->v4l2_dev;
 218         struct vsp1_entity *entity;
 219         unsigned int i;
 220         int ret;
 221
 222         mdev->dev = vsp1->dev;
 223         strlcpy(mdev->model, "VSP1", sizeof(mdev->model));
 224         snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
 225                  dev_name(mdev->dev));
 226         media_device_init(mdev);
 227
 228         vsp1->media_ops.link_setup = vsp1_entity_link_setup;
 229         /* Don't perform link validation when the userspace API is disabled as
 230          * the pipeline is configured internally by the driver in that case, and
 231          * its configuration can thus be trusted.
 232          */
 233         if (vsp1->info->uapi)
 234                 vsp1->media_ops.link_validate = v4l2_subdev_link_validate;
 235
 236         vdev->mdev = mdev;
 237         ret = v4l2_device_register(vsp1->dev, vdev);
 238         if (ret < 0) {
 239                 dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
 240                         ret);
 241                 goto done;
 242         }
 243
 244         /* Instantiate all the entities. */
 245         if (vsp1->info->features & VSP1_HAS_BRU) {
 246                 vsp1->bru = vsp1_bru_create(vsp1);
 247                 if (IS_ERR(vsp1->bru)) {
 248                         ret = PTR_ERR(vsp1->bru);
 249                         goto done;
 250                 }
 251
 252                 list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
 253         }
 254
 255         vsp1->hsi = vsp1_hsit_create(vsp1, true);
 256         if (IS_ERR(vsp1->hsi)) {
 257                 ret = PTR_ERR(vsp1->hsi);
 258                 goto done;
 259         }
 260
 261         list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
 262
 263         vsp1->hst = vsp1_hsit_create(vsp1, false);
 264         if (IS_ERR(vsp1->hst)) {
 265                 ret = PTR_ERR(vsp1->hst);
 266                 goto done;
 267         }
 268
 269         list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
 270
 271         if (vsp1->info->features & VSP1_HAS_LIF) {
 272                 vsp1->lif = vsp1_lif_create(vsp1);
 273                 if (IS_ERR(vsp1->lif)) {
 274                         ret = PTR_ERR(vsp1->lif);
 275                         goto done;
 276                 }
 277
 278                 list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities);
 279         }
 280
 281         if (vsp1->info->features & VSP1_HAS_LUT) {
 282                 vsp1->lut = vsp1_lut_create(vsp1);
 283                 if (IS_ERR(vsp1->lut)) {
 284                         ret = PTR_ERR(vsp1->lut);
 285                         goto done;
 286                 }
 287
 288                 list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
 289         }
 290
 291         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 292                 struct vsp1_rwpf *rpf;
 293
 294                 rpf = vsp1_rpf_create(vsp1, i);
 295                 if (IS_ERR(rpf)) {
 296                         ret = PTR_ERR(rpf);
 297                         goto done;
 298                 }
 299
 300                 vsp1->rpf[i] = rpf;
 301                 list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
 302
 303                 if (vsp1->info->uapi) {
 304                         struct vsp1_video *video = vsp1_video_create(vsp1, rpf);
 305
 306                         if (IS_ERR(video)) {
 307                                 ret = PTR_ERR(video);
 308                                 goto done;
 309                         }
 310
 311                         list_add_tail(&video->list, &vsp1->videos);
 312                 }
 313         }
 314
 315         if (vsp1->info->features & VSP1_HAS_SRU) {
 316                 vsp1->sru = vsp1_sru_create(vsp1);
 317                 if (IS_ERR(vsp1->sru)) {
 318                         ret = PTR_ERR(vsp1->sru);
 319                         goto done;
 320                 }
 321
 322                 list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
 323         }
 324
 325         for (i = 0; i < vsp1->info->uds_count; ++i) {
 326                 struct vsp1_uds *uds;
 327
 328                 uds = vsp1_uds_create(vsp1, i);
 329                 if (IS_ERR(uds)) {
 330                         ret = PTR_ERR(uds);
 331                         goto done;
 332                 }
 333
 334                 vsp1->uds[i] = uds;
 335                 list_add_tail(&uds->entity.list_dev, &vsp1->entities);
 336         }
 337
 338         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 339                 struct vsp1_rwpf *wpf;
 340
 341                 wpf = vsp1_wpf_create(vsp1, i);
 342                 if (IS_ERR(wpf)) {
 343                         ret = PTR_ERR(wpf);
 344                         goto done;
 345                 }
 346
 347                 vsp1->wpf[i] = wpf;
 348                 list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
 349
 350                 if (vsp1->info->uapi) {
 351                         struct vsp1_video *video = vsp1_video_create(vsp1, wpf);
 352
 353                         if (IS_ERR(video)) {
 354                                 ret = PTR_ERR(video);
 355                                 goto done;
 356                         }
 357
 358                         list_add_tail(&video->list, &vsp1->videos);
 359                         wpf->entity.sink = &video->video.entity;
 360                 }
 361         }
 362
 363         /* Register all subdevs. */
 364         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 365                 ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
 366                                                   &entity->subdev);
 367                 if (ret < 0)
 368                         goto done;
 369         }
 370
 371         /* Create links. */
 372         if (vsp1->info->uapi)
 373                 ret = vsp1_uapi_create_links(vsp1);
 374         else
 375                 ret = vsp1_drm_create_links(vsp1);
 376         if (ret < 0)
 377                 goto done;
 378
 379         /* Register subdev nodes if the userspace API is enabled or initialize
 380          * the DRM pipeline otherwise.
 381          */
 382         if (vsp1->info->uapi)
 383                 ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
 384         else
 385                 ret = vsp1_drm_init(vsp1);
 386         if (ret < 0)
 387                 goto done;
 388
 389         ret = media_device_register(mdev);
 390
 391 done:
 392         if (ret < 0)
 393                 vsp1_destroy_entities(vsp1);
 394
 395         return ret;
 396 }
 397
 398 int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
 399 {
 400         unsigned int timeout;
 401         u32 status;
 402
 403         status = vsp1_read(vsp1, VI6_STATUS);
 404         if (!(status & VI6_STATUS_SYS_ACT(index)))
 405                 return 0;
 406
 407         vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index));
 408         for (timeout = 10; timeout > 0; --timeout) {
 409                 status = vsp1_read(vsp1, VI6_STATUS);
 410                 if (!(status & VI6_STATUS_SYS_ACT(index)))
 411                         break;
 412
 413                 usleep_range(1000, 2000);
 414         }
 415
 416         if (!timeout) {
 417                 dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
 418                 return -ETIMEDOUT;
 419         }
 420
 421         return 0;
 422 }
 423
 424 static int vsp1_device_init(struct vsp1_device *vsp1)
 425 {
 426         unsigned int i;
 427         int ret;
 428
 429         /* Reset any channel that might be running. */
 430         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 431                 ret = vsp1_reset_wpf(vsp1, i);
 432                 if (ret < 0)
 433                         return ret;
 434         }
 435
 436         vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
 437                    (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
 438
 439         for (i = 0; i < vsp1->info->rpf_count; ++i)
 440                 vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
 441
 442         for (i = 0; i < vsp1->info->uds_count; ++i)
 443                 vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
 444
 445         vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
 446         vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
 447         vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
 448         vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
 449         vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
 450         vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
 451
 452         vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 453                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 454         vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 455                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 456
 457         vsp1_dlm_setup(vsp1);
 458
 459         return 0;
 460 }
 461
 462 /*
 463  * vsp1_device_get - Acquire the VSP1 device
 464  *
 465  * Increment the VSP1 reference count and initialize the device if the first
 466  * reference is taken.
 467  *
 468  * Return 0 on success or a negative error code otherwise.
 469  */
 470 int vsp1_device_get(struct vsp1_device *vsp1)
 471 {
 472         int ret = 0;
 473
 474         mutex_lock(&vsp1->lock);
 475         if (vsp1->ref_count > 0)
 476                 goto done;
 477
 478         ret = clk_prepare_enable(vsp1->clock);
 479         if (ret < 0)
 480                 goto done;
 481
 482         ret = vsp1_device_init(vsp1);
 483         if (ret < 0) {
 484                 clk_disable_unprepare(vsp1->clock);
 485                 goto done;
 486         }
 487
 488 done:
 489         if (!ret)
 490                 vsp1->ref_count++;
 491
 492         mutex_unlock(&vsp1->lock);
 493         return ret;
 494 }
 495
 496 /*
 497  * vsp1_device_put - Release the VSP1 device
 498  *
 499  * Decrement the VSP1 reference count and cleanup the device if the last
 500  * reference is released.
 501  */
 502 void vsp1_device_put(struct vsp1_device *vsp1)
 503 {
 504         mutex_lock(&vsp1->lock);
 505
 506         if (--vsp1->ref_count == 0)
 507                 clk_disable_unprepare(vsp1->clock);
 508
 509         mutex_unlock(&vsp1->lock);
 510 }
 511
 512 /* -----------------------------------------------------------------------------
 513  * Power Management
 514  */
 515
 516 #ifdef CONFIG_PM_SLEEP
 517 static int vsp1_pm_suspend(struct device *dev)
 518 {
 519         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 520
 521         WARN_ON(mutex_is_locked(&vsp1->lock));
 522
 523         if (vsp1->ref_count == 0)
 524                 return 0;
 525
 526         vsp1_pipelines_suspend(vsp1);
 527
 528         clk_disable_unprepare(vsp1->clock);
 529
 530         return 0;
 531 }
 532
 533 static int vsp1_pm_resume(struct device *dev)
 534 {
 535         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 536
 537         WARN_ON(mutex_is_locked(&vsp1->lock));
 538
 539         if (vsp1->ref_count == 0)
 540                 return 0;
 541
 542         clk_prepare_enable(vsp1->clock);
 543
 544         vsp1_pipelines_resume(vsp1);
 545
 546         return 0;
 547 }
 548 #endif
 549
 550 static const struct dev_pm_ops vsp1_pm_ops = {
 551         SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
 552 };
 553
 554 /* -----------------------------------------------------------------------------
 555  * Platform Driver
 556  */
 557
 558 static const struct vsp1_device_info vsp1_device_infos[] = {
 559         {
 560                 .version = VI6_IP_VERSION_MODEL_VSPS_H2,
 561                 .gen = 2,
 562                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT | VSP1_HAS_SRU,
 563                 .rpf_count = 5,
 564                 .uds_count = 3,
 565                 .wpf_count = 4,
 566                 .num_bru_inputs = 4,
 567                 .uapi = true,
 568         }, {
 569                 .version = VI6_IP_VERSION_MODEL_VSPR_H2,
 570                 .gen = 2,
 571                 .features = VSP1_HAS_BRU | VSP1_HAS_SRU,
 572                 .rpf_count = 5,
 573                 .uds_count = 1,
 574                 .wpf_count = 4,
 575                 .num_bru_inputs = 4,
 576                 .uapi = true,
 577         }, {
 578                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN2,
 579                 .gen = 2,
 580                 .features = VSP1_HAS_BRU | VSP1_HAS_LIF | VSP1_HAS_LUT,
 581                 .rpf_count = 4,
 582                 .uds_count = 1,
 583                 .wpf_count = 4,
 584                 .num_bru_inputs = 4,
 585                 .uapi = true,
 586         }, {
 587                 .version = VI6_IP_VERSION_MODEL_VSPS_M2,
 588                 .gen = 2,
 589                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT | VSP1_HAS_SRU,
 590                 .rpf_count = 5,
 591                 .uds_count = 3,
 592                 .wpf_count = 4,
 593                 .num_bru_inputs = 4,
 594                 .uapi = true,
 595         }, {
 596                 .version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
 597                 .gen = 3,
 598                 .features = VSP1_HAS_LUT | VSP1_HAS_SRU,
 599                 .rpf_count = 1,
 600                 .uds_count = 1,
 601                 .wpf_count = 1,
 602                 .uapi = true,
 603         }, {
 604                 .version = VI6_IP_VERSION_MODEL_VSPBD_GEN3,
 605                 .gen = 3,
 606                 .features = VSP1_HAS_BRU,
 607                 .rpf_count = 5,
 608                 .wpf_count = 1,
 609                 .num_bru_inputs = 5,
 610                 .uapi = true,
 611         }, {
 612                 .version = VI6_IP_VERSION_MODEL_VSPBC_GEN3,
 613                 .gen = 3,
 614                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT,
 615                 .rpf_count = 5,
 616                 .wpf_count = 1,
 617                 .num_bru_inputs = 5,
 618                 .uapi = true,
 619         }, {
 620                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN3,
 621                 .gen = 3,
 622                 .features = VSP1_HAS_BRU | VSP1_HAS_LIF,
 623                 .rpf_count = 5,
 624                 .wpf_count = 2,
 625                 .num_bru_inputs = 5,
 626         },
 627 };
 628
 629 static int vsp1_probe(struct platform_device *pdev)
 630 {
 631         struct vsp1_device *vsp1;
 632         struct resource *irq;
 633         struct resource *io;
 634         unsigned int i;
 635         u32 version;
 636         int ret;
 637
 638         vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
 639         if (vsp1 == NULL)
 640                 return -ENOMEM;
 641
 642         vsp1->dev = &pdev->dev;
 643         mutex_init(&vsp1->lock);
 644         INIT_LIST_HEAD(&vsp1->entities);
 645         INIT_LIST_HEAD(&vsp1->videos);
 646
 647         /* I/O, IRQ and clock resources */
 648         io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 649         vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
 650         if (IS_ERR(vsp1->mmio))
 651                 return PTR_ERR(vsp1->mmio);
 652
 653         vsp1->clock = devm_clk_get(&pdev->dev, NULL);
 654         if (IS_ERR(vsp1->clock)) {
 655                 dev_err(&pdev->dev, "failed to get clock\n");
 656                 return PTR_ERR(vsp1->clock);
 657         }
 658
 659         irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 660         if (!irq) {
 661                 dev_err(&pdev->dev, "missing IRQ\n");
 662                 return -EINVAL;
 663         }
 664
 665         ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
 666                               IRQF_SHARED, dev_name(&pdev->dev), vsp1);
 667         if (ret < 0) {
 668                 dev_err(&pdev->dev, "failed to request IRQ\n");
 669                 return ret;
 670         }
 671
 672         /* Configure device parameters based on the version register. */
 673         ret = clk_prepare_enable(vsp1->clock);
 674         if (ret < 0)
 675                 return ret;
 676
 677         version = vsp1_read(vsp1, VI6_IP_VERSION);
 678         clk_disable_unprepare(vsp1->clock);
 679
 680         for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
 681                 if ((version & VI6_IP_VERSION_MODEL_MASK) ==
 682                     vsp1_device_infos[i].version) {
 683                         vsp1->info = &vsp1_device_infos[i];
 684                         break;
 685                 }
 686         }
 687
 688         if (!vsp1->info) {
 689                 dev_err(&pdev->dev, "unsupported IP version 0x%08x\n", version);
 690                 return -ENXIO;
 691         }
 692
 693         dev_dbg(&pdev->dev, "IP version 0x%08x\n", version);
 694
 695         /* Instanciate entities */
 696         ret = vsp1_create_entities(vsp1);
 697         if (ret < 0) {
 698                 dev_err(&pdev->dev, "failed to create entities\n");
 699                 return ret;
 700         }
 701
 702         platform_set_drvdata(pdev, vsp1);
 703
 704         return 0;
 705 }
 706
 707 static int vsp1_remove(struct platform_device *pdev)
 708 {
 709         struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
 710
 711         vsp1_destroy_entities(vsp1);
 712
 713         return 0;
 714 }
 715
 716 static const struct of_device_id vsp1_of_match[] = {
 717         { .compatible = "renesas,vsp1" },
 718         { .compatible = "renesas,vsp2" },
 719         { },
 720 };
 721
 722 static struct platform_driver vsp1_platform_driver = {
 723         .probe          = vsp1_probe,
 724         .remove         = vsp1_remove,
 725         .driver         = {
 726                 .name   = "vsp1",
 727                 .pm     = &vsp1_pm_ops,
 728                 .of_match_table = vsp1_of_match,
 729         },
 730 };
 731
 732 module_platform_driver(vsp1_platform_driver);
 733
 734 MODULE_ALIAS("vsp1");
 735 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 736 MODULE_DESCRIPTION("Renesas VSP1 Driver");
 737 MODULE_LICENSE("GPL");