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_rwpf.h"
  34 #include "vsp1_sru.h"
  35 #include "vsp1_uds.h"
  36 #include "vsp1_video.h"
  37
  38 /* -----------------------------------------------------------------------------
  39  * Interrupt Handling
  40  */
  41
  42 static irqreturn_t vsp1_irq_handler(int irq, void *data)
  43 {
  44         u32 mask = VI6_WFP_IRQ_STA_DFE | VI6_WFP_IRQ_STA_FRE;
  45         struct vsp1_device *vsp1 = data;
  46         irqreturn_t ret = IRQ_NONE;
  47         unsigned int i;
  48         u32 status;
  49
  50         for (i = 0; i < vsp1->info->wpf_count; ++i) {
  51                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
  52                 struct vsp1_pipeline *pipe;
  53
  54                 if (wpf == NULL)
  55                         continue;
  56
  57                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
  58                 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
  59                 vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
  60
  61                 if (status & VI6_WFP_IRQ_STA_FRE) {
  62                         vsp1_pipeline_frame_end(pipe);
  63                         ret = IRQ_HANDLED;
  64                 }
  65         }
  66
  67         status = vsp1_read(vsp1, VI6_DISP_IRQ_STA);
  68         vsp1_write(vsp1, VI6_DISP_IRQ_STA, ~status & VI6_DISP_IRQ_STA_DST);
  69
  70         if (status & VI6_DISP_IRQ_STA_DST) {
  71                 struct vsp1_rwpf *wpf = vsp1->wpf[0];
  72                 struct vsp1_pipeline *pipe;
  73
  74                 if (wpf) {
  75                         pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
  76                         vsp1_pipeline_display_start(pipe);
  77                 }
  78
  79                 ret = IRQ_HANDLED;
  80         }
  81
  82         return ret;
  83 }
  84
  85 /* -----------------------------------------------------------------------------
  86  * Entities
  87  */
  88
  89 /*
  90  * vsp1_create_sink_links - Create links from all sources to the given sink
  91  *
  92  * This function creates media links from all valid sources to the given sink
  93  * pad. Links that would be invalid according to the VSP1 hardware capabilities
  94  * are skipped. Those include all links
  95  *
  96  * - from a UDS to a UDS (UDS entities can't be chained)
  97  * - from an entity to itself (no loops are allowed)
  98  */
  99 static int vsp1_create_sink_links(struct vsp1_device *vsp1,
 100                                   struct vsp1_entity *sink)
 101 {
 102         struct media_entity *entity = &sink->subdev.entity;
 103         struct vsp1_entity *source;
 104         unsigned int pad;
 105         int ret;
 106
 107         list_for_each_entry(source, &vsp1->entities, list_dev) {
 108                 u32 flags;
 109
 110                 if (source->type == sink->type)
 111                         continue;
 112
 113                 if (source->type == VSP1_ENTITY_LIF ||
 114                     source->type == VSP1_ENTITY_WPF)
 115                         continue;
 116
 117                 flags = source->type == VSP1_ENTITY_RPF &&
 118                         sink->type == VSP1_ENTITY_WPF &&
 119                         source->index == sink->index
 120                       ? MEDIA_LNK_FL_ENABLED : 0;
 121
 122                 for (pad = 0; pad < entity->num_pads; ++pad) {
 123                         if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
 124                                 continue;
 125
 126                         ret = media_create_pad_link(&source->subdev.entity,
 127                                                        source->source_pad,
 128                                                        entity, pad, flags);
 129                         if (ret < 0)
 130                                 return ret;
 131
 132                         if (flags & MEDIA_LNK_FL_ENABLED)
 133                                 source->sink = entity;
 134                 }
 135         }
 136
 137         return 0;
 138 }
 139
 140 static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
 141 {
 142         struct vsp1_entity *entity;
 143         unsigned int i;
 144         int ret;
 145
 146         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 147                 if (entity->type == VSP1_ENTITY_LIF ||
 148                     entity->type == VSP1_ENTITY_RPF)
 149                         continue;
 150
 151                 ret = vsp1_create_sink_links(vsp1, entity);
 152                 if (ret < 0)
 153                         return ret;
 154         }
 155
 156         if (vsp1->info->features & VSP1_HAS_LIF) {
 157                 ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
 158                                             RWPF_PAD_SOURCE,
 159                                             &vsp1->lif->entity.subdev.entity,
 160                                             LIF_PAD_SINK, 0);
 161                 if (ret < 0)
 162                         return ret;
 163         }
 164
 165         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 166                 struct vsp1_rwpf *rpf = vsp1->rpf[i];
 167
 168                 ret = media_create_pad_link(&rpf->video->video.entity, 0,
 169                                             &rpf->entity.subdev.entity,
 170                                             RWPF_PAD_SINK,
 171                                             MEDIA_LNK_FL_ENABLED |
 172                                             MEDIA_LNK_FL_IMMUTABLE);
 173                 if (ret < 0)
 174                         return ret;
 175         }
 176
 177         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 178                 /* Connect the video device to the WPF. All connections are
 179                  * immutable except for the WPF0 source link if a LIF is
 180                  * present.
 181                  */
 182                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 183                 unsigned int flags = MEDIA_LNK_FL_ENABLED;
 184
 185                 if (!(vsp1->info->features & VSP1_HAS_LIF) || i != 0)
 186                         flags |= MEDIA_LNK_FL_IMMUTABLE;
 187
 188                 ret = media_create_pad_link(&wpf->entity.subdev.entity,
 189                                             RWPF_PAD_SOURCE,
 190                                             &wpf->video->video.entity, 0,
 191                                             flags);
 192                 if (ret < 0)
 193                         return ret;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static void vsp1_destroy_entities(struct vsp1_device *vsp1)
 200 {
 201         struct vsp1_entity *entity, *_entity;
 202         struct vsp1_video *video, *_video;
 203
 204         list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
 205                 list_del(&entity->list_dev);
 206                 vsp1_entity_destroy(entity);
 207         }
 208
 209         list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
 210                 list_del(&video->list);
 211                 vsp1_video_cleanup(video);
 212         }
 213
 214         v4l2_device_unregister(&vsp1->v4l2_dev);
 215         media_device_unregister(&vsp1->media_dev);
 216         media_device_cleanup(&vsp1->media_dev);
 217
 218         if (!vsp1->info->uapi)
 219                 vsp1_drm_cleanup(vsp1);
 220 }
 221
 222 static int vsp1_create_entities(struct vsp1_device *vsp1)
 223 {
 224         struct media_device *mdev = &vsp1->media_dev;
 225         struct v4l2_device *vdev = &vsp1->v4l2_dev;
 226         struct vsp1_entity *entity;
 227         unsigned int i;
 228         int ret;
 229
 230         mdev->dev = vsp1->dev;
 231         strlcpy(mdev->model, "VSP1", sizeof(mdev->model));
 232         snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
 233                  dev_name(mdev->dev));
 234         media_device_init(mdev);
 235
 236         vsp1->media_ops.link_setup = vsp1_entity_link_setup;
 237         /* Don't perform link validation when the userspace API is disabled as
 238          * the pipeline is configured internally by the driver in that case, and
 239          * its configuration can thus be trusted.
 240          */
 241         if (vsp1->info->uapi)
 242                 vsp1->media_ops.link_validate = v4l2_subdev_link_validate;
 243
 244         vdev->mdev = mdev;
 245         ret = v4l2_device_register(vsp1->dev, vdev);
 246         if (ret < 0) {
 247                 dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
 248                         ret);
 249                 goto done;
 250         }
 251
 252         /* Instantiate all the entities. */
 253         if (vsp1->info->features & VSP1_HAS_BRU) {
 254                 vsp1->bru = vsp1_bru_create(vsp1);
 255                 if (IS_ERR(vsp1->bru)) {
 256                         ret = PTR_ERR(vsp1->bru);
 257                         goto done;
 258                 }
 259
 260                 list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
 261         }
 262
 263         vsp1->hsi = vsp1_hsit_create(vsp1, true);
 264         if (IS_ERR(vsp1->hsi)) {
 265                 ret = PTR_ERR(vsp1->hsi);
 266                 goto done;
 267         }
 268
 269         list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
 270
 271         vsp1->hst = vsp1_hsit_create(vsp1, false);
 272         if (IS_ERR(vsp1->hst)) {
 273                 ret = PTR_ERR(vsp1->hst);
 274                 goto done;
 275         }
 276
 277         list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
 278
 279         if (vsp1->info->features & VSP1_HAS_LIF) {
 280                 vsp1->lif = vsp1_lif_create(vsp1);
 281                 if (IS_ERR(vsp1->lif)) {
 282                         ret = PTR_ERR(vsp1->lif);
 283                         goto done;
 284                 }
 285
 286                 list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities);
 287         }
 288
 289         if (vsp1->info->features & VSP1_HAS_LUT) {
 290                 vsp1->lut = vsp1_lut_create(vsp1);
 291                 if (IS_ERR(vsp1->lut)) {
 292                         ret = PTR_ERR(vsp1->lut);
 293                         goto done;
 294                 }
 295
 296                 list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
 297         }
 298
 299         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 300                 struct vsp1_rwpf *rpf;
 301
 302                 rpf = vsp1_rpf_create(vsp1, i);
 303                 if (IS_ERR(rpf)) {
 304                         ret = PTR_ERR(rpf);
 305                         goto done;
 306                 }
 307
 308                 vsp1->rpf[i] = rpf;
 309                 list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
 310
 311                 if (vsp1->info->uapi) {
 312                         struct vsp1_video *video = vsp1_video_create(vsp1, rpf);
 313
 314                         if (IS_ERR(video)) {
 315                                 ret = PTR_ERR(video);
 316                                 goto done;
 317                         }
 318
 319                         list_add_tail(&video->list, &vsp1->videos);
 320                 }
 321         }
 322
 323         if (vsp1->info->features & VSP1_HAS_SRU) {
 324                 vsp1->sru = vsp1_sru_create(vsp1);
 325                 if (IS_ERR(vsp1->sru)) {
 326                         ret = PTR_ERR(vsp1->sru);
 327                         goto done;
 328                 }
 329
 330                 list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
 331         }
 332
 333         for (i = 0; i < vsp1->info->uds_count; ++i) {
 334                 struct vsp1_uds *uds;
 335
 336                 uds = vsp1_uds_create(vsp1, i);
 337                 if (IS_ERR(uds)) {
 338                         ret = PTR_ERR(uds);
 339                         goto done;
 340                 }
 341
 342                 vsp1->uds[i] = uds;
 343                 list_add_tail(&uds->entity.list_dev, &vsp1->entities);
 344         }
 345
 346         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 347                 struct vsp1_rwpf *wpf;
 348
 349                 wpf = vsp1_wpf_create(vsp1, i);
 350                 if (IS_ERR(wpf)) {
 351                         ret = PTR_ERR(wpf);
 352                         goto done;
 353                 }
 354
 355                 vsp1->wpf[i] = wpf;
 356                 list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
 357
 358                 if (vsp1->info->uapi) {
 359                         struct vsp1_video *video = vsp1_video_create(vsp1, wpf);
 360
 361                         if (IS_ERR(video)) {
 362                                 ret = PTR_ERR(video);
 363                                 goto done;
 364                         }
 365
 366                         list_add_tail(&video->list, &vsp1->videos);
 367                         wpf->entity.sink = &video->video.entity;
 368                 }
 369         }
 370
 371         /* Register all subdevs. */
 372         list_for_each_entry(entity, &vsp1->entities, list_dev) {
 373                 ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
 374                                                   &entity->subdev);
 375                 if (ret < 0)
 376                         goto done;
 377         }
 378
 379         /* Create links. */
 380         if (vsp1->info->uapi)
 381                 ret = vsp1_uapi_create_links(vsp1);
 382         else
 383                 ret = vsp1_drm_create_links(vsp1);
 384         if (ret < 0)
 385                 goto done;
 386
 387         /* Register subdev nodes if the userspace API is enabled or initialize
 388          * the DRM pipeline otherwise.
 389          */
 390         if (vsp1->info->uapi) {
 391                 vsp1->use_dl = false;
 392                 ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
 393         } else {
 394                 vsp1->use_dl = true;
 395                 ret = vsp1_drm_init(vsp1);
 396         }
 397         if (ret < 0)
 398                 goto done;
 399
 400         ret = media_device_register(mdev);
 401
 402 done:
 403         if (ret < 0)
 404                 vsp1_destroy_entities(vsp1);
 405
 406         return ret;
 407 }
 408
 409 int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
 410 {
 411         unsigned int timeout;
 412         u32 status;
 413
 414         status = vsp1_read(vsp1, VI6_STATUS);
 415         if (!(status & VI6_STATUS_SYS_ACT(index)))
 416                 return 0;
 417
 418         vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index));
 419         for (timeout = 10; timeout > 0; --timeout) {
 420                 status = vsp1_read(vsp1, VI6_STATUS);
 421                 if (!(status & VI6_STATUS_SYS_ACT(index)))
 422                         break;
 423
 424                 usleep_range(1000, 2000);
 425         }
 426
 427         if (!timeout) {
 428                 dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
 429                 return -ETIMEDOUT;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int vsp1_device_init(struct vsp1_device *vsp1)
 436 {
 437         unsigned int i;
 438         int ret;
 439
 440         /* Reset any channel that might be running. */
 441         for (i = 0; i < vsp1->info->wpf_count; ++i) {
 442                 ret = vsp1_reset_wpf(vsp1, i);
 443                 if (ret < 0)
 444                         return ret;
 445         }
 446
 447         vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
 448                    (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
 449
 450         for (i = 0; i < vsp1->info->rpf_count; ++i)
 451                 vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
 452
 453         for (i = 0; i < vsp1->info->uds_count; ++i)
 454                 vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
 455
 456         vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
 457         vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
 458         vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
 459         vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
 460         vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
 461         vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
 462
 463         vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 464                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 465         vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
 466                    (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
 467
 468         if (vsp1->use_dl)
 469                 vsp1_dl_setup(vsp1);
 470
 471         return 0;
 472 }
 473
 474 /*
 475  * vsp1_device_get - Acquire the VSP1 device
 476  *
 477  * Increment the VSP1 reference count and initialize the device if the first
 478  * reference is taken.
 479  *
 480  * Return 0 on success or a negative error code otherwise.
 481  */
 482 int vsp1_device_get(struct vsp1_device *vsp1)
 483 {
 484         int ret = 0;
 485
 486         mutex_lock(&vsp1->lock);
 487         if (vsp1->ref_count > 0)
 488                 goto done;
 489
 490         ret = clk_prepare_enable(vsp1->clock);
 491         if (ret < 0)
 492                 goto done;
 493
 494         ret = vsp1_device_init(vsp1);
 495         if (ret < 0) {
 496                 clk_disable_unprepare(vsp1->clock);
 497                 goto done;
 498         }
 499
 500 done:
 501         if (!ret)
 502                 vsp1->ref_count++;
 503
 504         mutex_unlock(&vsp1->lock);
 505         return ret;
 506 }
 507
 508 /*
 509  * vsp1_device_put - Release the VSP1 device
 510  *
 511  * Decrement the VSP1 reference count and cleanup the device if the last
 512  * reference is released.
 513  */
 514 void vsp1_device_put(struct vsp1_device *vsp1)
 515 {
 516         mutex_lock(&vsp1->lock);
 517
 518         if (--vsp1->ref_count == 0)
 519                 clk_disable_unprepare(vsp1->clock);
 520
 521         mutex_unlock(&vsp1->lock);
 522 }
 523
 524 /* -----------------------------------------------------------------------------
 525  * Power Management
 526  */
 527
 528 #ifdef CONFIG_PM_SLEEP
 529 static int vsp1_pm_suspend(struct device *dev)
 530 {
 531         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 532
 533         WARN_ON(mutex_is_locked(&vsp1->lock));
 534
 535         if (vsp1->ref_count == 0)
 536                 return 0;
 537
 538         vsp1_pipelines_suspend(vsp1);
 539
 540         clk_disable_unprepare(vsp1->clock);
 541
 542         return 0;
 543 }
 544
 545 static int vsp1_pm_resume(struct device *dev)
 546 {
 547         struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 548
 549         WARN_ON(mutex_is_locked(&vsp1->lock));
 550
 551         if (vsp1->ref_count == 0)
 552                 return 0;
 553
 554         clk_prepare_enable(vsp1->clock);
 555
 556         vsp1_pipelines_resume(vsp1);
 557
 558         return 0;
 559 }
 560 #endif
 561
 562 static const struct dev_pm_ops vsp1_pm_ops = {
 563         SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
 564 };
 565
 566 /* -----------------------------------------------------------------------------
 567  * Platform Driver
 568  */
 569
 570 static const struct vsp1_device_info vsp1_device_infos[] = {
 571         {
 572                 .version = VI6_IP_VERSION_MODEL_VSPS_H2,
 573                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT | VSP1_HAS_SRU,
 574                 .rpf_count = 5,
 575                 .uds_count = 3,
 576                 .wpf_count = 4,
 577                 .num_bru_inputs = 4,
 578                 .uapi = true,
 579         }, {
 580                 .version = VI6_IP_VERSION_MODEL_VSPR_H2,
 581                 .features = VSP1_HAS_BRU | VSP1_HAS_SRU,
 582                 .rpf_count = 5,
 583                 .uds_count = 1,
 584                 .wpf_count = 4,
 585                 .num_bru_inputs = 4,
 586                 .uapi = true,
 587         }, {
 588                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN2,
 589                 .features = VSP1_HAS_BRU | VSP1_HAS_LIF | VSP1_HAS_LUT,
 590                 .rpf_count = 4,
 591                 .uds_count = 1,
 592                 .wpf_count = 4,
 593                 .num_bru_inputs = 4,
 594                 .uapi = true,
 595         }, {
 596                 .version = VI6_IP_VERSION_MODEL_VSPS_M2,
 597                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT | VSP1_HAS_SRU,
 598                 .rpf_count = 5,
 599                 .uds_count = 3,
 600                 .wpf_count = 4,
 601                 .num_bru_inputs = 4,
 602                 .uapi = true,
 603         }, {
 604                 .version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
 605                 .features = VSP1_HAS_LUT | VSP1_HAS_SRU,
 606                 .rpf_count = 1,
 607                 .uds_count = 1,
 608                 .wpf_count = 1,
 609                 .uapi = true,
 610         }, {
 611                 .version = VI6_IP_VERSION_MODEL_VSPBD_GEN3,
 612                 .features = VSP1_HAS_BRU,
 613                 .rpf_count = 5,
 614                 .wpf_count = 1,
 615                 .num_bru_inputs = 5,
 616                 .uapi = true,
 617         }, {
 618                 .version = VI6_IP_VERSION_MODEL_VSPBC_GEN3,
 619                 .features = VSP1_HAS_BRU | VSP1_HAS_LUT,
 620                 .rpf_count = 5,
 621                 .wpf_count = 1,
 622                 .num_bru_inputs = 5,
 623                 .uapi = true,
 624         }, {
 625                 .version = VI6_IP_VERSION_MODEL_VSPD_GEN3,
 626                 .features = VSP1_HAS_BRU | VSP1_HAS_LIF,
 627                 .rpf_count = 5,
 628                 .wpf_count = 2,
 629                 .num_bru_inputs = 5,
 630         },
 631 };
 632
 633 static int vsp1_probe(struct platform_device *pdev)
 634 {
 635         struct vsp1_device *vsp1;
 636         struct resource *irq;
 637         struct resource *io;
 638         unsigned int i;
 639         u32 version;
 640         int ret;
 641
 642         vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
 643         if (vsp1 == NULL)
 644                 return -ENOMEM;
 645
 646         vsp1->dev = &pdev->dev;
 647         mutex_init(&vsp1->lock);
 648         INIT_LIST_HEAD(&vsp1->entities);
 649         INIT_LIST_HEAD(&vsp1->videos);
 650
 651         /* I/O, IRQ and clock resources */
 652         io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 653         vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
 654         if (IS_ERR(vsp1->mmio))
 655                 return PTR_ERR(vsp1->mmio);
 656
 657         vsp1->clock = devm_clk_get(&pdev->dev, NULL);
 658         if (IS_ERR(vsp1->clock)) {
 659                 dev_err(&pdev->dev, "failed to get clock\n");
 660                 return PTR_ERR(vsp1->clock);
 661         }
 662
 663         irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 664         if (!irq) {
 665                 dev_err(&pdev->dev, "missing IRQ\n");
 666                 return -EINVAL;
 667         }
 668
 669         ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
 670                               IRQF_SHARED, dev_name(&pdev->dev), vsp1);
 671         if (ret < 0) {
 672                 dev_err(&pdev->dev, "failed to request IRQ\n");
 673                 return ret;
 674         }
 675
 676         /* Configure device parameters based on the version register. */
 677         ret = clk_prepare_enable(vsp1->clock);
 678         if (ret < 0)
 679                 return ret;
 680
 681         version = vsp1_read(vsp1, VI6_IP_VERSION);
 682         clk_disable_unprepare(vsp1->clock);
 683
 684         for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
 685                 if ((version & VI6_IP_VERSION_MODEL_MASK) ==
 686                     vsp1_device_infos[i].version) {
 687                         vsp1->info = &vsp1_device_infos[i];
 688                         break;
 689                 }
 690         }
 691
 692         if (!vsp1->info) {
 693                 dev_err(&pdev->dev, "unsupported IP version 0x%08x\n", version);
 694                 return -ENXIO;
 695         }
 696
 697         dev_dbg(&pdev->dev, "IP version 0x%08x\n", version);
 698
 699         /* Instanciate entities */
 700         ret = vsp1_create_entities(vsp1);
 701         if (ret < 0) {
 702                 dev_err(&pdev->dev, "failed to create entities\n");
 703                 return ret;
 704         }
 705
 706         platform_set_drvdata(pdev, vsp1);
 707
 708         return 0;
 709 }
 710
 711 static int vsp1_remove(struct platform_device *pdev)
 712 {
 713         struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
 714
 715         vsp1_destroy_entities(vsp1);
 716
 717         return 0;
 718 }
 719
 720 static const struct of_device_id vsp1_of_match[] = {
 721         { .compatible = "renesas,vsp1" },
 722         { .compatible = "renesas,vsp2" },
 723         { },
 724 };
 725
 726 static struct platform_driver vsp1_platform_driver = {
 727         .probe          = vsp1_probe,
 728         .remove         = vsp1_remove,
 729         .driver         = {
 730                 .name   = "vsp1",
 731                 .pm     = &vsp1_pm_ops,
 732                 .of_match_table = vsp1_of_match,
 733         },
 734 };
 735
 736 module_platform_driver(vsp1_platform_driver);
 737
 738 MODULE_ALIAS("vsp1");
 739 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 740 MODULE_DESCRIPTION("Renesas VSP1 Driver");
 741 MODULE_LICENSE("GPL");